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bind9/bin/named/server.c
Evan Hunt ba0313e649 fix spelling errors reported by Fossies.
2020-02-21 15:05:08 +11:00

15720 lines
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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <ctype.h>
#include <inttypes.h>
#include <limits.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <isc/aes.h>
#include <isc/app.h>
#include <isc/base64.h>
#include <isc/commandline.h>
#include <isc/dir.h>
#include <isc/file.h>
#include <isc/hash.h>
#include <isc/hex.h>
#include <isc/hmac.h>
#include <isc/httpd.h>
#include <isc/lex.h>
#include <isc/meminfo.h>
#include <isc/nonce.h>
#include <isc/parseint.h>
#include <isc/platform.h>
#include <isc/portset.h>
#include <isc/print.h>
#include <isc/refcount.h>
#include <isc/resource.h>
#include <isc/siphash.h>
#include <isc/socket.h>
#include <isc/stat.h>
#include <isc/stats.h>
#include <isc/stdio.h>
#include <isc/string.h>
#include <isc/task.h>
#include <isc/timer.h>
#include <isc/util.h>
#include <dns/adb.h>
#include <dns/badcache.h>
#include <dns/cache.h>
#include <dns/catz.h>
#include <dns/db.h>
#include <dns/dispatch.h>
#include <dns/dlz.h>
#include <dns/dns64.h>
#include <dns/dnsrps.h>
#include <dns/dyndb.h>
#include <dns/events.h>
#include <dns/fixedname.h>
#include <dns/forward.h>
#include <dns/geoip.h>
#include <dns/journal.h>
#include <dns/kasp.h>
#include <dns/keytable.h>
#include <dns/keyvalues.h>
#include <dns/lib.h>
#include <dns/master.h>
#include <dns/masterdump.h>
#include <dns/nta.h>
#include <dns/order.h>
#include <dns/peer.h>
#include <dns/portlist.h>
#include <dns/private.h>
#include <dns/rbt.h>
#include <dns/rdataclass.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/rdatastruct.h>
#include <dns/resolver.h>
#include <dns/rootns.h>
#include <dns/rriterator.h>
#include <dns/secalg.h>
#include <dns/soa.h>
#include <dns/stats.h>
#include <dns/tkey.h>
#include <dns/tsig.h>
#include <dns/ttl.h>
#include <dns/view.h>
#include <dns/zone.h>
#include <dns/zt.h>
#include <isccfg/grammar.h>
#include <isccfg/kaspconf.h>
#include <isccfg/namedconf.h>
#include <ns/client.h>
#include <ns/hooks.h>
#include <ns/interfacemgr.h>
#include <ns/listenlist.h>
#include <bind9/check.h>
#include <dst/dst.h>
#include <dst/result.h>
#include <named/config.h>
#include <named/control.h>
#include <sys/stat.h>
#include <sys/types.h>
#if defined(HAVE_GEOIP2)
#include <named/geoip.h>
#endif /* HAVE_GEOIP2 */
#include <named/log.h>
#include <named/logconf.h>
#include <named/main.h>
#include <named/os.h>
#include <named/server.h>
#include <named/statschannel.h>
#include <named/tkeyconf.h>
#include <named/tsigconf.h>
#include <named/zoneconf.h>
#ifdef HAVE_LIBSCF
#include <stdlib.h>
#include <named/smf_globals.h>
#endif /* ifdef HAVE_LIBSCF */
#ifdef HAVE_LMDB
#include <lmdb.h>
#define count_newzones count_newzones_db
#define configure_newzones configure_newzones_db
#define dumpzone dumpzone_db
#else /* HAVE_LMDB */
#define count_newzones count_newzones_file
#define configure_newzones configure_newzones_file
#define dumpzone dumpzone_file
#endif /* HAVE_LMDB */
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif /* ifndef SIZE_MAX */
#ifndef SIZE_AS_PERCENT
#define SIZE_AS_PERCENT ((size_t)-2)
#endif /* ifndef SIZE_AS_PERCENT */
#ifdef TUNE_LARGE
#define RESOLVER_NTASKS 523
#define UDPBUFFERS 32768
#define EXCLBUFFERS 32768
#else /* ifdef TUNE_LARGE */
#define RESOLVER_NTASKS 31
#define UDPBUFFERS 1000
#define EXCLBUFFERS 4096
#endif /* TUNE_LARGE */
#define MAX_TCP_TIMEOUT 65535
/*%
* Check an operation for failure. Assumes that the function
* using it has a 'result' variable and a 'cleanup' label.
*/
#define CHECK(op) \
do { \
result = (op); \
if (result != ISC_R_SUCCESS) \
goto cleanup; \
} while (0)
#define TCHECK(op) \
do { \
tresult = (op); \
if (tresult != ISC_R_SUCCESS) { \
isc_buffer_clear(*text); \
goto cleanup; \
} \
} while (0)
#define CHECKM(op, msg) \
do { \
result = (op); \
if (result != ISC_R_SUCCESS) { \
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL, \
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR, \
"%s: %s", msg, \
isc_result_totext(result)); \
goto cleanup; \
} \
} while (0)
#define CHECKMF(op, msg, file) \
do { \
result = (op); \
if (result != ISC_R_SUCCESS) { \
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL, \
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR, \
"%s '%s': %s", msg, file, \
isc_result_totext(result)); \
goto cleanup; \
} \
} while (0)
#define CHECKFATAL(op, msg) \
do { \
result = (op); \
if (result != ISC_R_SUCCESS) \
fatal(server, msg, result); \
} while (0)
/*%
* Maximum ADB size for views that share a cache. Use this limit to suppress
* the total of memory footprint, which should be the main reason for sharing
* a cache. Only effective when a finite max-cache-size is specified.
* This is currently defined to be 8MB.
*/
#define MAX_ADB_SIZE_FOR_CACHESHARE 8388608U
struct named_dispatch {
isc_sockaddr_t addr;
unsigned int dispatchgen;
dns_dispatch_t *dispatch;
ISC_LINK(struct named_dispatch) link;
};
struct named_cache {
dns_cache_t *cache;
dns_view_t *primaryview;
bool needflush;
bool adbsizeadjusted;
dns_rdataclass_t rdclass;
ISC_LINK(named_cache_t) link;
};
struct dumpcontext {
isc_mem_t *mctx;
bool dumpcache;
bool dumpzones;
bool dumpadb;
bool dumpbad;
bool dumpfail;
FILE *fp;
ISC_LIST(struct viewlistentry) viewlist;
struct viewlistentry *view;
struct zonelistentry *zone;
dns_dumpctx_t *mdctx;
dns_db_t *db;
dns_db_t *cache;
isc_task_t *task;
dns_dbversion_t *version;
};
struct viewlistentry {
dns_view_t *view;
ISC_LINK(struct viewlistentry) link;
ISC_LIST(struct zonelistentry) zonelist;
};
struct zonelistentry {
dns_zone_t *zone;
ISC_LINK(struct zonelistentry) link;
};
/*%
* Configuration context to retain for each view that allows
* new zones to be added at runtime.
*/
typedef struct ns_cfgctx {
isc_mem_t *mctx;
cfg_parser_t *conf_parser;
cfg_parser_t *add_parser;
cfg_obj_t *config;
cfg_obj_t *vconfig;
cfg_obj_t *nzf_config;
cfg_aclconfctx_t *actx;
} ns_cfgctx_t;
/*%
* A function to write out added-zone configuration to the new_zone_file
* specified in 'view'. Maybe called by delete_zoneconf().
*/
typedef isc_result_t (*nzfwriter_t)(const cfg_obj_t *config, dns_view_t *view);
/*%
* Holds state information for the initial zone loading process.
* Uses the isc_refcount structure to count the number of views
* with pending zone loads, dereferencing as each view finishes.
*/
typedef struct {
named_server_t *server;
bool reconfig;
isc_refcount_t refs;
} ns_zoneload_t;
typedef struct {
named_server_t *server;
} catz_cb_data_t;
typedef struct catz_chgzone_event {
ISC_EVENT_COMMON(struct catz_chgzone_event);
dns_catz_entry_t *entry;
dns_catz_zone_t *origin;
dns_view_t *view;
catz_cb_data_t *cbd;
bool mod;
} catz_chgzone_event_t;
typedef struct {
unsigned int magic;
#define DZARG_MAGIC ISC_MAGIC('D', 'z', 'a', 'r')
isc_buffer_t **text;
isc_result_t result;
} ns_dzarg_t;
/*
* These zones should not leak onto the Internet.
*/
const char *empty_zones[] = {
/* RFC 1918 */
"10.IN-ADDR.ARPA", "16.172.IN-ADDR.ARPA", "17.172.IN-ADDR.ARPA",
"18.172.IN-ADDR.ARPA", "19.172.IN-ADDR.ARPA", "20.172.IN-ADDR.ARPA",
"21.172.IN-ADDR.ARPA", "22.172.IN-ADDR.ARPA", "23.172.IN-ADDR.ARPA",
"24.172.IN-ADDR.ARPA", "25.172.IN-ADDR.ARPA", "26.172.IN-ADDR.ARPA",
"27.172.IN-ADDR.ARPA", "28.172.IN-ADDR.ARPA", "29.172.IN-ADDR.ARPA",
"30.172.IN-ADDR.ARPA", "31.172.IN-ADDR.ARPA", "168.192.IN-ADDR.ARPA",
/* RFC 6598 */
"64.100.IN-ADDR.ARPA", "65.100.IN-ADDR.ARPA", "66.100.IN-ADDR.ARPA",
"67.100.IN-ADDR.ARPA", "68.100.IN-ADDR.ARPA", "69.100.IN-ADDR.ARPA",
"70.100.IN-ADDR.ARPA", "71.100.IN-ADDR.ARPA", "72.100.IN-ADDR.ARPA",
"73.100.IN-ADDR.ARPA", "74.100.IN-ADDR.ARPA", "75.100.IN-ADDR.ARPA",
"76.100.IN-ADDR.ARPA", "77.100.IN-ADDR.ARPA", "78.100.IN-ADDR.ARPA",
"79.100.IN-ADDR.ARPA", "80.100.IN-ADDR.ARPA", "81.100.IN-ADDR.ARPA",
"82.100.IN-ADDR.ARPA", "83.100.IN-ADDR.ARPA", "84.100.IN-ADDR.ARPA",
"85.100.IN-ADDR.ARPA", "86.100.IN-ADDR.ARPA", "87.100.IN-ADDR.ARPA",
"88.100.IN-ADDR.ARPA", "89.100.IN-ADDR.ARPA", "90.100.IN-ADDR.ARPA",
"91.100.IN-ADDR.ARPA", "92.100.IN-ADDR.ARPA", "93.100.IN-ADDR.ARPA",
"94.100.IN-ADDR.ARPA", "95.100.IN-ADDR.ARPA", "96.100.IN-ADDR.ARPA",
"97.100.IN-ADDR.ARPA", "98.100.IN-ADDR.ARPA", "99.100.IN-ADDR.ARPA",
"100.100.IN-ADDR.ARPA", "101.100.IN-ADDR.ARPA", "102.100.IN-ADDR.ARPA",
"103.100.IN-ADDR.ARPA", "104.100.IN-ADDR.ARPA", "105.100.IN-ADDR.ARPA",
"106.100.IN-ADDR.ARPA", "107.100.IN-ADDR.ARPA", "108.100.IN-ADDR.ARPA",
"109.100.IN-ADDR.ARPA", "110.100.IN-ADDR.ARPA", "111.100.IN-ADDR.ARPA",
"112.100.IN-ADDR.ARPA", "113.100.IN-ADDR.ARPA", "114.100.IN-ADDR.ARPA",
"115.100.IN-ADDR.ARPA", "116.100.IN-ADDR.ARPA", "117.100.IN-ADDR.ARPA",
"118.100.IN-ADDR.ARPA", "119.100.IN-ADDR.ARPA", "120.100.IN-ADDR.ARPA",
"121.100.IN-ADDR.ARPA", "122.100.IN-ADDR.ARPA", "123.100.IN-ADDR.ARPA",
"124.100.IN-ADDR.ARPA", "125.100.IN-ADDR.ARPA", "126.100.IN-ADDR.ARPA",
"127.100.IN-ADDR.ARPA",
/* RFC 5735 and RFC 5737 */
"0.IN-ADDR.ARPA", /* THIS NETWORK */
"127.IN-ADDR.ARPA", /* LOOPBACK */
"254.169.IN-ADDR.ARPA", /* LINK LOCAL */
"2.0.192.IN-ADDR.ARPA", /* TEST NET */
"100.51.198.IN-ADDR.ARPA", /* TEST NET 2 */
"113.0.203.IN-ADDR.ARPA", /* TEST NET 3 */
"255.255.255.255.IN-ADDR.ARPA", /* BROADCAST */
/* Local IPv6 Unicast Addresses */
"0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6."
"ARPA",
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6."
"ARPA",
/* LOCALLY ASSIGNED LOCAL ADDRESS SCOPE */
"D.F.IP6.ARPA", "8.E.F.IP6.ARPA", /* LINK LOCAL */
"9.E.F.IP6.ARPA", /* LINK LOCAL */
"A.E.F.IP6.ARPA", /* LINK LOCAL */
"B.E.F.IP6.ARPA", /* LINK LOCAL */
/* Example Prefix, RFC 3849. */
"8.B.D.0.1.0.0.2.IP6.ARPA",
/* RFC 7534 */
"EMPTY.AS112.ARPA",
/* RFC 8375 */
"HOME.ARPA",
NULL
};
ISC_PLATFORM_NORETURN_PRE static void
fatal(named_server_t *server, const char *msg,
isc_result_t result) ISC_PLATFORM_NORETURN_POST;
static void
named_server_reload(isc_task_t *task, isc_event_t *event);
static isc_result_t
ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
cfg_aclconfctx_t *actx, isc_mem_t *mctx,
uint16_t family, ns_listenelt_t **target);
static isc_result_t
ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
cfg_aclconfctx_t *actx, isc_mem_t *mctx,
uint16_t family, ns_listenlist_t **target);
static isc_result_t
configure_forward(const cfg_obj_t *config, dns_view_t *view,
const dns_name_t *origin, const cfg_obj_t *forwarders,
const cfg_obj_t *forwardtype);
static isc_result_t
configure_alternates(const cfg_obj_t *config, dns_view_t *view,
const cfg_obj_t *alternates);
static isc_result_t
configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
dns_viewlist_t *viewlist, dns_kasplist_t *kasplist,
cfg_aclconfctx_t *aclconf, bool added, bool old_rpz_ok,
bool modify);
static isc_result_t
configure_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
isc_mem_t *mctx, cfg_aclconfctx_t *actx);
static isc_result_t
add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx);
static void
end_reserved_dispatches(named_server_t *server, bool all);
static void
newzone_cfgctx_destroy(void **cfgp);
static inline isc_result_t
putstr(isc_buffer_t **b, const char *str);
static isc_result_t
putmem(isc_buffer_t **b, const char *str, size_t len);
static isc_result_t
putuint8(isc_buffer_t **b, uint8_t val);
static inline isc_result_t
putnull(isc_buffer_t **b);
static int
count_zones(const cfg_obj_t *conf);
#ifdef HAVE_LMDB
static isc_result_t
migrate_nzf(dns_view_t *view);
static isc_result_t
nzd_writable(dns_view_t *view);
static isc_result_t
nzd_open(dns_view_t *view, unsigned int flags, MDB_txn **txnp, MDB_dbi *dbi);
static isc_result_t
nzd_env_reopen(dns_view_t *view);
static void
nzd_env_close(dns_view_t *view);
static isc_result_t
nzd_close(MDB_txn **txnp, bool commit);
static isc_result_t
nzd_count(dns_view_t *view, int *countp);
#else /* ifdef HAVE_LMDB */
static isc_result_t
nzf_append(dns_view_t *view, const cfg_obj_t *zconfig);
#endif /* ifdef HAVE_LMDB */
/*%
* Configure a single view ACL at '*aclp'. Get its configuration from
* 'vconfig' (for per-view configuration) and maybe from 'config'
*/
static isc_result_t
configure_view_acl(const cfg_obj_t *vconfig, const cfg_obj_t *config,
const cfg_obj_t *gconfig, const char *aclname,
const char *acltuplename, cfg_aclconfctx_t *actx,
isc_mem_t *mctx, dns_acl_t **aclp) {
isc_result_t result;
const cfg_obj_t *maps[4];
const cfg_obj_t *aclobj = NULL;
int i = 0;
if (*aclp != NULL) {
dns_acl_detach(aclp);
}
if (vconfig != NULL) {
maps[i++] = cfg_tuple_get(vconfig, "options");
}
if (config != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(config, "options", &options);
if (options != NULL) {
maps[i++] = options;
}
}
if (gconfig != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(gconfig, "options", &options);
if (options != NULL) {
maps[i++] = options;
}
}
maps[i] = NULL;
(void)named_config_get(maps, aclname, &aclobj);
if (aclobj == NULL) {
/*
* No value available. *aclp == NULL.
*/
return (ISC_R_SUCCESS);
}
if (acltuplename != NULL) {
/*
* If the ACL is given in an optional tuple, retrieve it.
* The parser should have ensured that a valid object be
* returned.
*/
aclobj = cfg_tuple_get(aclobj, acltuplename);
}
result = cfg_acl_fromconfig(aclobj, config, named_g_lctx, actx, mctx, 0,
aclp);
return (result);
}
/*%
* Configure a sortlist at '*aclp'. Essentially the same as
* configure_view_acl() except it calls cfg_acl_fromconfig with a
* nest_level value of 2.
*/
static isc_result_t
configure_view_sortlist(const cfg_obj_t *vconfig, const cfg_obj_t *config,
cfg_aclconfctx_t *actx, isc_mem_t *mctx,
dns_acl_t **aclp) {
isc_result_t result;
const cfg_obj_t *maps[3];
const cfg_obj_t *aclobj = NULL;
int i = 0;
if (*aclp != NULL) {
dns_acl_detach(aclp);
}
if (vconfig != NULL) {
maps[i++] = cfg_tuple_get(vconfig, "options");
}
if (config != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(config, "options", &options);
if (options != NULL) {
maps[i++] = options;
}
}
maps[i] = NULL;
(void)named_config_get(maps, "sortlist", &aclobj);
if (aclobj == NULL) {
return (ISC_R_SUCCESS);
}
/*
* Use a nest level of 3 for the "top level" of the sortlist;
* this means each entry in the top three levels will be stored
* as lists of separate, nested ACLs, rather than merged together
* into IP tables as is usually done with ACLs.
*/
result = cfg_acl_fromconfig(aclobj, config, named_g_lctx, actx, mctx, 3,
aclp);
return (result);
}
static isc_result_t
configure_view_nametable(const cfg_obj_t *vconfig, const cfg_obj_t *config,
const char *confname, const char *conftuplename,
isc_mem_t *mctx, dns_rbt_t **rbtp) {
isc_result_t result;
const cfg_obj_t *maps[3];
const cfg_obj_t *obj = NULL;
const cfg_listelt_t *element;
int i = 0;
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t b;
const char *str;
const cfg_obj_t *nameobj;
if (*rbtp != NULL) {
dns_rbt_destroy(rbtp);
}
if (vconfig != NULL) {
maps[i++] = cfg_tuple_get(vconfig, "options");
}
if (config != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(config, "options", &options);
if (options != NULL) {
maps[i++] = options;
}
}
maps[i] = NULL;
(void)named_config_get(maps, confname, &obj);
if (obj == NULL) {
/*
* No value available. *rbtp == NULL.
*/
return (ISC_R_SUCCESS);
}
if (conftuplename != NULL) {
obj = cfg_tuple_get(obj, conftuplename);
if (cfg_obj_isvoid(obj)) {
return (ISC_R_SUCCESS);
}
}
result = dns_rbt_create(mctx, NULL, NULL, rbtp);
if (result != ISC_R_SUCCESS) {
return (result);
}
name = dns_fixedname_initname(&fixed);
for (element = cfg_list_first(obj); element != NULL;
element = cfg_list_next(element))
{
nameobj = cfg_listelt_value(element);
str = cfg_obj_asstring(nameobj);
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
/*
* We don't need the node data, but need to set dummy data to
* avoid a partial match with an empty node. For example, if
* we have foo.example.com and bar.example.com, we'd get a match
* for baz.example.com, which is not the expected result.
* We simply use (void *)1 as the dummy data.
*/
result = dns_rbt_addname(*rbtp, name, (void *)1);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(nameobj, named_g_lctx, ISC_LOG_ERROR,
"failed to add %s for %s: %s", str,
confname, isc_result_totext(result));
goto cleanup;
}
}
return (result);
cleanup:
dns_rbt_destroy(rbtp);
return (result);
}
static isc_result_t
ta_fromconfig(const cfg_obj_t *key, bool *initialp, const char **namestrp,
unsigned char *digest, dns_rdata_ds_t *ds) {
isc_result_t result;
dns_rdata_dnskey_t keystruct;
dns_rdata_t rdata = DNS_RDATA_INIT;
uint32_t rdata1, rdata2, rdata3;
const char *datastr = NULL, *namestr = NULL;
unsigned char data[4096];
isc_buffer_t databuf;
unsigned char rrdata[4096];
isc_buffer_t rrdatabuf;
isc_region_t r;
dns_fixedname_t fname;
dns_name_t *name = NULL;
isc_buffer_t namebuf;
const char *atstr = NULL;
enum { INIT_DNSKEY,
STATIC_DNSKEY,
INIT_DS,
STATIC_DS,
TRUSTED } anchortype;
REQUIRE(namestrp != NULL && *namestrp == NULL);
REQUIRE(ds != NULL);
/* if DNSKEY, flags; if DS, key tag */
rdata1 = cfg_obj_asuint32(cfg_tuple_get(key, "rdata1"));
/* if DNSKEY, protocol; if DS, algorithm */
rdata2 = cfg_obj_asuint32(cfg_tuple_get(key, "rdata2"));
/* if DNSKEY, algorithm; if DS, digest type */
rdata3 = cfg_obj_asuint32(cfg_tuple_get(key, "rdata3"));
namestr = cfg_obj_asstring(cfg_tuple_get(key, "name"));
*namestrp = namestr;
name = dns_fixedname_initname(&fname);
isc_buffer_constinit(&namebuf, namestr, strlen(namestr));
isc_buffer_add(&namebuf, strlen(namestr));
CHECK(dns_name_fromtext(name, &namebuf, dns_rootname, 0, NULL));
if (*initialp) {
atstr = cfg_obj_asstring(cfg_tuple_get(key, "anchortype"));
if (strcasecmp(atstr, "static-key") == 0) {
*initialp = false;
anchortype = STATIC_DNSKEY;
} else if (strcasecmp(atstr, "static-ds") == 0) {
*initialp = false;
anchortype = STATIC_DS;
} else if (strcasecmp(atstr, "initial-key") == 0) {
anchortype = INIT_DNSKEY;
} else if (strcasecmp(atstr, "initial-ds") == 0) {
anchortype = INIT_DS;
} else {
cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
"key '%s': "
"invalid initialization method '%s'",
namestr, atstr);
result = ISC_R_FAILURE;
goto cleanup;
}
} else {
anchortype = TRUSTED;
}
isc_buffer_init(&databuf, data, sizeof(data));
isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));
*ds = (dns_rdata_ds_t){ .common.rdclass = dns_rdataclass_in,
.common.rdtype = dns_rdatatype_ds };
ISC_LINK_INIT(&ds->common, link);
switch (anchortype) {
case INIT_DNSKEY:
case STATIC_DNSKEY:
case TRUSTED:
/*
* This function should never be reached for view
* class other than IN
*/
keystruct.common.rdclass = dns_rdataclass_in;
keystruct.common.rdtype = dns_rdatatype_dnskey;
/*
* The key data in keystruct is not dynamically allocated.
*/
keystruct.mctx = NULL;
ISC_LINK_INIT(&keystruct.common, link);
if (rdata1 > 0xffff) {
CHECKM(ISC_R_RANGE, "key flags");
}
if (rdata1 & DNS_KEYFLAG_REVOKE) {
CHECKM(DST_R_BADKEYTYPE, "key flags revoke bit set");
}
if (rdata2 > 0xff) {
CHECKM(ISC_R_RANGE, "key protocol");
}
if (rdata3 > 0xff) {
CHECKM(ISC_R_RANGE, "key algorithm");
}
keystruct.flags = (uint16_t)rdata1;
keystruct.protocol = (uint8_t)rdata2;
keystruct.algorithm = (uint8_t)rdata3;
if (!dst_algorithm_supported(keystruct.algorithm)) {
CHECK(DST_R_UNSUPPORTEDALG);
}
datastr = cfg_obj_asstring(cfg_tuple_get(key, "data"));
CHECK(isc_base64_decodestring(datastr, &databuf));
isc_buffer_usedregion(&databuf, &r);
keystruct.datalen = r.length;
keystruct.data = r.base;
CHECK(dns_rdata_fromstruct(&rdata, keystruct.common.rdclass,
keystruct.common.rdtype, &keystruct,
&rrdatabuf));
CHECK(dns_ds_fromkeyrdata(name, &rdata, DNS_DSDIGEST_SHA256,
digest, ds));
break;
case INIT_DS:
case STATIC_DS:
if (rdata1 > 0xffff) {
CHECKM(ISC_R_RANGE, "key tag");
}
if (rdata2 > 0xff) {
CHECKM(ISC_R_RANGE, "key algorithm");
}
if (rdata3 > 0xff) {
CHECKM(ISC_R_RANGE, "digest type");
}
ds->key_tag = (uint16_t)rdata1;
ds->algorithm = (uint8_t)rdata2;
ds->digest_type = (uint8_t)rdata3;
datastr = cfg_obj_asstring(cfg_tuple_get(key, "data"));
CHECK(isc_hex_decodestring(datastr, &databuf));
isc_buffer_usedregion(&databuf, &r);
switch (ds->digest_type) {
case DNS_DSDIGEST_SHA1:
if (r.length != ISC_SHA1_DIGESTLENGTH) {
CHECK(ISC_R_UNEXPECTEDEND);
}
break;
case DNS_DSDIGEST_SHA256:
if (r.length != ISC_SHA256_DIGESTLENGTH) {
CHECK(ISC_R_UNEXPECTEDEND);
}
break;
case DNS_DSDIGEST_SHA384:
if (r.length != ISC_SHA384_DIGESTLENGTH) {
CHECK(ISC_R_UNEXPECTEDEND);
}
break;
default:
cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
"key '%s': "
"unknown ds digest type %u",
namestr, ds->digest_type);
result = ISC_R_FAILURE;
goto cleanup;
break;
}
ds->length = r.length;
ds->digest = digest;
memmove(ds->digest, r.base, r.length);
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
return (ISC_R_SUCCESS);
cleanup:
return (result);
}
/*%
* Parse 'key' in the context of view configuration 'vconfig'. If successful,
* add the key to 'secroots' if both of the following conditions are true:
*
* - 'keyname_match' is NULL or it matches the owner name of 'key',
* - support for the algorithm used by 'key' is not disabled by 'resolver'
* for the owner name of 'key'.
*
* 'managed' is true for managed keys and false for trusted keys. 'mctx' is
* the memory context to use for allocating memory.
*/
static isc_result_t
process_key(const cfg_obj_t *key, dns_keytable_t *secroots,
const dns_name_t *keyname_match, dns_resolver_t *resolver,
bool managed) {
dns_fixedname_t fkeyname;
dns_name_t *keyname = NULL;
const char *namestr = NULL;
dns_rdata_ds_t ds;
isc_result_t result;
bool initializing = managed;
unsigned char digest[ISC_MAX_MD_SIZE];
isc_buffer_t b;
result = ta_fromconfig(key, &initializing, &namestr, digest, &ds);
switch (result) {
case ISC_R_SUCCESS:
/*
* Trust anchor was parsed correctly.
*/
isc_buffer_constinit(&b, namestr, strlen(namestr));
isc_buffer_add(&b, strlen(namestr));
keyname = dns_fixedname_initname(&fkeyname);
result = dns_name_fromtext(keyname, &b, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS) {
return (result);
}
break;
case DST_R_UNSUPPORTEDALG:
case DST_R_BADKEYTYPE:
/*
* Key was parsed correctly, but it cannot be used; this is not
* a fatal error - log a warning about this key being ignored,
* but do not prevent any further ones from being processed.
*/
cfg_obj_log(key, named_g_lctx, ISC_LOG_WARNING,
"ignoring %s for '%s': %s",
initializing ? "initial-key" : "static-key",
namestr, isc_result_totext(result));
return (ISC_R_SUCCESS);
case DST_R_NOCRYPTO:
/*
* Crypto support is not available.
*/
cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
"ignoring %s for '%s': no crypto support",
initializing ? "initial-key" : "static-key",
namestr);
return (result);
default:
/*
* Something unexpected happened; we have no choice but to
* indicate an error so that the configuration loading process
* is interrupted.
*/
cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
"configuring %s for '%s': %s",
initializing ? "initial-key" : "static-key",
namestr, isc_result_totext(result));
return (ISC_R_FAILURE);
}
/*
* If the caller requested to only load keys for a specific name and
* the owner name of this key does not match the requested name, do not
* load it.
*/
if (keyname_match != NULL && !dns_name_equal(keyname_match, keyname)) {
goto done;
}
/*
* Ensure that 'resolver' allows using the algorithm of this key for
* its owner name. If it does not, do not load the key and log a
* warning, but do not prevent further keys from being processed.
*/
if (!dns_resolver_algorithm_supported(resolver, keyname, ds.algorithm))
{
cfg_obj_log(key, named_g_lctx, ISC_LOG_WARNING,
"ignoring %s for '%s': algorithm is disabled",
initializing ? "initial-key" : "static-key",
namestr);
goto done;
}
/*
* Add the key to 'secroots'. Keys from a "trust-anchors" or
* "managed-keys" statement may be either static or initializing
* keys. If it's not initializing, we don't want to treat it as
* managed, so we use 'initializing' twice here, for both the
* 'managed' and 'initializing' arguments to dns_keytable_add().
*/
result = dns_keytable_add(secroots, initializing, initializing, keyname,
&ds);
done:
return (result);
}
/*
* Load keys from configuration into key table. If 'keyname' is specified,
* only load keys matching that name. If 'managed' is true, load the key as
* an initializing key.
*/
static isc_result_t
load_view_keys(const cfg_obj_t *keys, dns_view_t *view, bool managed,
const dns_name_t *keyname) {
const cfg_listelt_t *elt, *elt2;
const cfg_obj_t *keylist;
isc_result_t result;
dns_keytable_t *secroots = NULL;
CHECK(dns_view_getsecroots(view, &secroots));
for (elt = cfg_list_first(keys); elt != NULL; elt = cfg_list_next(elt))
{
keylist = cfg_listelt_value(elt);
for (elt2 = cfg_list_first(keylist); elt2 != NULL;
elt2 = cfg_list_next(elt2)) {
CHECK(process_key(cfg_listelt_value(elt2), secroots,
keyname, view->resolver, managed));
}
}
cleanup:
if (secroots != NULL) {
dns_keytable_detach(&secroots);
}
if (result == DST_R_NOCRYPTO) {
result = ISC_R_SUCCESS;
}
return (result);
}
/*%
* Check whether a key has been successfully loaded.
*/
static bool
keyloaded(dns_view_t *view, const dns_name_t *name) {
isc_result_t result;
dns_keytable_t *secroots = NULL;
dns_keynode_t *keynode = NULL;
result = dns_view_getsecroots(view, &secroots);
if (result != ISC_R_SUCCESS) {
return (false);
}
result = dns_keytable_find(secroots, name, &keynode);
if (keynode != NULL) {
dns_keytable_detachkeynode(secroots, &keynode);
}
if (secroots != NULL) {
dns_keytable_detach(&secroots);
}
return (result == ISC_R_SUCCESS);
}
/*%
* Configure DNSSEC keys for a view.
*
* The per-view configuration values and the server-global defaults are read
* from 'vconfig' and 'config'.
*/
static isc_result_t
configure_view_dnsseckeys(dns_view_t *view, const cfg_obj_t *vconfig,
const cfg_obj_t *config, const cfg_obj_t *bindkeys,
bool auto_root, isc_mem_t *mctx) {
isc_result_t result = ISC_R_SUCCESS;
const cfg_obj_t *view_keys = NULL;
const cfg_obj_t *global_keys = NULL;
const cfg_obj_t *view_managed_keys = NULL;
const cfg_obj_t *view_trust_anchors = NULL;
const cfg_obj_t *global_managed_keys = NULL;
const cfg_obj_t *global_trust_anchors = NULL;
const cfg_obj_t *maps[4];
const cfg_obj_t *voptions = NULL;
const cfg_obj_t *options = NULL;
const cfg_obj_t *obj = NULL;
const char *directory;
int i = 0;
/* We don't need trust anchors for the _bind view */
if (strcmp(view->name, "_bind") == 0 &&
view->rdclass == dns_rdataclass_chaos) {
return (ISC_R_SUCCESS);
}
if (vconfig != NULL) {
voptions = cfg_tuple_get(vconfig, "options");
if (voptions != NULL) {
(void)cfg_map_get(voptions, "trusted-keys", &view_keys);
/* managed-keys and trust-anchors are synonyms. */
(void)cfg_map_get(voptions, "managed-keys",
&view_managed_keys);
(void)cfg_map_get(voptions, "trust-anchors",
&view_trust_anchors);
maps[i++] = voptions;
}
}
if (config != NULL) {
(void)cfg_map_get(config, "trusted-keys", &global_keys);
/* managed-keys and trust-anchors are synonyms. */
(void)cfg_map_get(config, "managed-keys", &global_managed_keys);
(void)cfg_map_get(config, "trust-anchors",
&global_trust_anchors);
(void)cfg_map_get(config, "options", &options);
if (options != NULL) {
maps[i++] = options;
}
}
maps[i++] = named_g_defaults;
maps[i] = NULL;
result = dns_view_initsecroots(view, mctx);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"couldn't create keytable");
return (ISC_R_UNEXPECTED);
}
result = dns_view_initntatable(view, named_g_taskmgr, named_g_timermgr);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"couldn't create NTA table");
return (ISC_R_UNEXPECTED);
}
if (auto_root && view->rdclass == dns_rdataclass_in) {
const cfg_obj_t *builtin_keys = NULL;
/*
* If bind.keys exists and is populated, it overrides
* the trust-anchors clause hard-coded in named_g_config.
*/
if (bindkeys != NULL) {
isc_log_write(named_g_lctx, DNS_LOGCATEGORY_SECURITY,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"obtaining root key for view %s "
"from '%s'",
view->name, named_g_server->bindkeysfile);
(void)cfg_map_get(bindkeys, "trust-anchors",
&builtin_keys);
if (builtin_keys == NULL) {
isc_log_write(
named_g_lctx, DNS_LOGCATEGORY_SECURITY,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"dnssec-validation auto: "
"WARNING: root zone key "
"not found");
}
}
if (builtin_keys == NULL) {
isc_log_write(named_g_lctx, DNS_LOGCATEGORY_SECURITY,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"using built-in root key for view %s",
view->name);
(void)cfg_map_get(named_g_config, "trust-anchors",
&builtin_keys);
}
if (builtin_keys != NULL) {
CHECK(load_view_keys(builtin_keys, view, true,
dns_rootname));
}
if (!keyloaded(view, dns_rootname)) {
isc_log_write(named_g_lctx, DNS_LOGCATEGORY_SECURITY,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"root key not loaded");
result = ISC_R_FAILURE;
goto cleanup;
}
}
if (view->rdclass == dns_rdataclass_in) {
CHECK(load_view_keys(view_keys, view, false, NULL));
CHECK(load_view_keys(view_trust_anchors, view, true, NULL));
CHECK(load_view_keys(view_managed_keys, view, true, NULL));
CHECK(load_view_keys(global_keys, view, false, NULL));
CHECK(load_view_keys(global_trust_anchors, view, true, NULL));
CHECK(load_view_keys(global_managed_keys, view, true, NULL));
}
/*
* Add key zone for managed keys.
*/
obj = NULL;
(void)named_config_get(maps, "managed-keys-directory", &obj);
directory = (obj != NULL ? cfg_obj_asstring(obj) : NULL);
if (directory != NULL) {
result = isc_file_isdirectory(directory);
}
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, DNS_LOGCATEGORY_SECURITY,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"invalid managed-keys-directory %s: %s",
directory, isc_result_totext(result));
goto cleanup;
} else if (directory != NULL) {
if (!isc_file_isdirwritable(directory)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"managed-keys-directory '%s' "
"is not writable",
directory);
result = ISC_R_NOPERM;
goto cleanup;
}
}
CHECK(add_keydata_zone(view, directory, named_g_mctx));
cleanup:
return (result);
}
static isc_result_t
mustbesecure(const cfg_obj_t *mbs, dns_resolver_t *resolver) {
const cfg_listelt_t *element;
const cfg_obj_t *obj;
const char *str;
dns_fixedname_t fixed;
dns_name_t *name;
bool value;
isc_result_t result;
isc_buffer_t b;
name = dns_fixedname_initname(&fixed);
for (element = cfg_list_first(mbs); element != NULL;
element = cfg_list_next(element))
{
obj = cfg_listelt_value(element);
str = cfg_obj_asstring(cfg_tuple_get(obj, "name"));
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
value = cfg_obj_asboolean(cfg_tuple_get(obj, "value"));
CHECK(dns_resolver_setmustbesecure(resolver, name, value));
}
result = ISC_R_SUCCESS;
cleanup:
return (result);
}
/*%
* Get a dispatch appropriate for the resolver of a given view.
*/
static isc_result_t
get_view_querysource_dispatch(const cfg_obj_t **maps, int af,
dns_dispatch_t **dispatchp, isc_dscp_t *dscpp,
bool is_firstview) {
isc_result_t result = ISC_R_FAILURE;
dns_dispatch_t *disp;
isc_sockaddr_t sa;
unsigned int attrs, attrmask;
const cfg_obj_t *obj = NULL;
unsigned int maxdispatchbuffers = UDPBUFFERS;
isc_dscp_t dscp = -1;
switch (af) {
case AF_INET:
result = named_config_get(maps, "query-source", &obj);
INSIST(result == ISC_R_SUCCESS);
break;
case AF_INET6:
result = named_config_get(maps, "query-source-v6", &obj);
INSIST(result == ISC_R_SUCCESS);
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
sa = *(cfg_obj_assockaddr(obj));
INSIST(isc_sockaddr_pf(&sa) == af);
dscp = cfg_obj_getdscp(obj);
if (dscp != -1 && dscpp != NULL) {
*dscpp = dscp;
}
/*
* If we don't support this address family, we're done!
*/
switch (af) {
case AF_INET:
result = isc_net_probeipv4();
break;
case AF_INET6:
result = isc_net_probeipv6();
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
if (result != ISC_R_SUCCESS) {
return (ISC_R_SUCCESS);
}
/*
* Try to find a dispatcher that we can share.
*/
attrs = 0;
attrs |= DNS_DISPATCHATTR_UDP;
switch (af) {
case AF_INET:
attrs |= DNS_DISPATCHATTR_IPV4;
break;
case AF_INET6:
attrs |= DNS_DISPATCHATTR_IPV6;
break;
}
if (isc_sockaddr_getport(&sa) == 0) {
attrs |= DNS_DISPATCHATTR_EXCLUSIVE;
maxdispatchbuffers = EXCLBUFFERS;
} else {
INSIST(obj != NULL);
if (is_firstview) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_INFO,
"using specific query-source port "
"suppresses port randomization and can be "
"insecure.");
}
}
attrmask = 0;
attrmask |= DNS_DISPATCHATTR_UDP;
attrmask |= DNS_DISPATCHATTR_TCP;
attrmask |= DNS_DISPATCHATTR_IPV4;
attrmask |= DNS_DISPATCHATTR_IPV6;
disp = NULL;
result = dns_dispatch_getudp(named_g_dispatchmgr, named_g_socketmgr,
named_g_taskmgr, &sa, 4096,
maxdispatchbuffers, 32768, 16411, 16433,
attrs, attrmask, &disp);
if (result != ISC_R_SUCCESS) {
isc_sockaddr_t any;
char buf[ISC_SOCKADDR_FORMATSIZE];
switch (af) {
case AF_INET:
isc_sockaddr_any(&any);
break;
case AF_INET6:
isc_sockaddr_any6(&any);
break;
}
if (isc_sockaddr_equal(&sa, &any)) {
return (ISC_R_SUCCESS);
}
isc_sockaddr_format(&sa, buf, sizeof(buf));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"could not get query source dispatcher (%s)",
buf);
return (result);
}
*dispatchp = disp;
return (ISC_R_SUCCESS);
}
static isc_result_t
configure_order(dns_order_t *order, const cfg_obj_t *ent) {
dns_rdataclass_t rdclass;
dns_rdatatype_t rdtype;
const cfg_obj_t *obj;
dns_fixedname_t fixed;
unsigned int mode = 0;
const char *str;
isc_buffer_t b;
isc_result_t result;
bool addroot;
result = named_config_getclass(cfg_tuple_get(ent, "class"),
dns_rdataclass_any, &rdclass);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = named_config_gettype(cfg_tuple_get(ent, "type"),
dns_rdatatype_any, &rdtype);
if (result != ISC_R_SUCCESS) {
return (result);
}
obj = cfg_tuple_get(ent, "name");
if (cfg_obj_isstring(obj)) {
str = cfg_obj_asstring(obj);
} else {
str = "*";
}
addroot = (strcmp(str, "*") == 0);
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
dns_fixedname_init(&fixed);
result = dns_name_fromtext(dns_fixedname_name(&fixed), &b, dns_rootname,
0, NULL);
if (result != ISC_R_SUCCESS) {
return (result);
}
obj = cfg_tuple_get(ent, "ordering");
INSIST(cfg_obj_isstring(obj));
str = cfg_obj_asstring(obj);
if (!strcasecmp(str, "fixed")) {
#if DNS_RDATASET_FIXED
mode = DNS_RDATASETATTR_FIXEDORDER;
#else /* if DNS_RDATASET_FIXED */
mode = DNS_RDATASETATTR_CYCLIC;
#endif /* DNS_RDATASET_FIXED */
} else if (!strcasecmp(str, "random")) {
mode = DNS_RDATASETATTR_RANDOMIZE;
} else if (!strcasecmp(str, "cyclic")) {
mode = DNS_RDATASETATTR_CYCLIC;
} else if (!strcasecmp(str, "none")) {
mode = DNS_RDATASETATTR_NONE;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
/*
* "*" should match everything including the root (BIND 8 compat).
* As dns_name_matcheswildcard(".", "*.") returns FALSE add a
* explicit entry for "." when the name is "*".
*/
if (addroot) {
result = dns_order_add(order, dns_rootname, rdtype, rdclass,
mode);
if (result != ISC_R_SUCCESS) {
return (result);
}
}
return (dns_order_add(order, dns_fixedname_name(&fixed), rdtype,
rdclass, mode));
}
static isc_result_t
configure_peer(const cfg_obj_t *cpeer, isc_mem_t *mctx, dns_peer_t **peerp) {
isc_netaddr_t na;
dns_peer_t *peer;
const cfg_obj_t *obj;
const char *str;
isc_result_t result;
unsigned int prefixlen;
cfg_obj_asnetprefix(cfg_map_getname(cpeer), &na, &prefixlen);
peer = NULL;
result = dns_peer_newprefix(mctx, &na, prefixlen, &peer);
if (result != ISC_R_SUCCESS) {
return (result);
}
obj = NULL;
(void)cfg_map_get(cpeer, "bogus", &obj);
if (obj != NULL) {
CHECK(dns_peer_setbogus(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "provide-ixfr", &obj);
if (obj != NULL) {
CHECK(dns_peer_setprovideixfr(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "request-expire", &obj);
if (obj != NULL) {
CHECK(dns_peer_setrequestexpire(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "request-ixfr", &obj);
if (obj != NULL) {
CHECK(dns_peer_setrequestixfr(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "request-nsid", &obj);
if (obj != NULL) {
CHECK(dns_peer_setrequestnsid(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "send-cookie", &obj);
if (obj != NULL) {
CHECK(dns_peer_setsendcookie(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "edns", &obj);
if (obj != NULL) {
CHECK(dns_peer_setsupportedns(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "edns-udp-size", &obj);
if (obj != NULL) {
uint32_t udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512U) {
udpsize = 512U;
}
if (udpsize > 4096U) {
udpsize = 4096U;
}
CHECK(dns_peer_setudpsize(peer, (uint16_t)udpsize));
}
obj = NULL;
(void)cfg_map_get(cpeer, "edns-version", &obj);
if (obj != NULL) {
uint32_t ednsversion = cfg_obj_asuint32(obj);
if (ednsversion > 255U) {
ednsversion = 255U;
}
CHECK(dns_peer_setednsversion(peer, (uint8_t)ednsversion));
}
obj = NULL;
(void)cfg_map_get(cpeer, "max-udp-size", &obj);
if (obj != NULL) {
uint32_t udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512U) {
udpsize = 512U;
}
if (udpsize > 4096U) {
udpsize = 4096U;
}
CHECK(dns_peer_setmaxudp(peer, (uint16_t)udpsize));
}
obj = NULL;
(void)cfg_map_get(cpeer, "padding", &obj);
if (obj != NULL) {
uint32_t padding = cfg_obj_asuint32(obj);
if (padding > 512U) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"server padding value cannot "
"exceed 512: lowering");
padding = 512U;
}
CHECK(dns_peer_setpadding(peer, (uint16_t)padding));
}
obj = NULL;
(void)cfg_map_get(cpeer, "tcp-only", &obj);
if (obj != NULL) {
CHECK(dns_peer_setforcetcp(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "tcp-keepalive", &obj);
if (obj != NULL) {
CHECK(dns_peer_settcpkeepalive(peer, cfg_obj_asboolean(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "transfers", &obj);
if (obj != NULL) {
CHECK(dns_peer_settransfers(peer, cfg_obj_asuint32(obj)));
}
obj = NULL;
(void)cfg_map_get(cpeer, "transfer-format", &obj);
if (obj != NULL) {
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "many-answers") == 0) {
CHECK(dns_peer_settransferformat(peer,
dns_many_answers));
} else if (strcasecmp(str, "one-answer") == 0) {
CHECK(dns_peer_settransferformat(peer, dns_one_answer));
} else {
INSIST(0);
ISC_UNREACHABLE();
}
}
obj = NULL;
(void)cfg_map_get(cpeer, "keys", &obj);
if (obj != NULL) {
result = dns_peer_setkeybycharp(peer, cfg_obj_asstring(obj));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
obj = NULL;
if (na.family == AF_INET) {
(void)cfg_map_get(cpeer, "transfer-source", &obj);
} else {
(void)cfg_map_get(cpeer, "transfer-source-v6", &obj);
}
if (obj != NULL) {
result = dns_peer_settransfersource(peer,
cfg_obj_assockaddr(obj));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
result = dns_peer_settransferdscp(peer, cfg_obj_getdscp(obj));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
}
obj = NULL;
if (na.family == AF_INET) {
(void)cfg_map_get(cpeer, "notify-source", &obj);
} else {
(void)cfg_map_get(cpeer, "notify-source-v6", &obj);
}
if (obj != NULL) {
result = dns_peer_setnotifysource(peer,
cfg_obj_assockaddr(obj));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
result = dns_peer_setnotifydscp(peer, cfg_obj_getdscp(obj));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
}
obj = NULL;
if (na.family == AF_INET) {
(void)cfg_map_get(cpeer, "query-source", &obj);
} else {
(void)cfg_map_get(cpeer, "query-source-v6", &obj);
}
if (obj != NULL) {
result = dns_peer_setquerysource(peer, cfg_obj_assockaddr(obj));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
result = dns_peer_setquerydscp(peer, cfg_obj_getdscp(obj));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
}
*peerp = peer;
return (ISC_R_SUCCESS);
cleanup:
dns_peer_detach(&peer);
return (result);
}
#ifdef HAVE_DLOPEN
static isc_result_t
configure_dyndb(const cfg_obj_t *dyndb, isc_mem_t *mctx,
const dns_dyndbctx_t *dctx) {
isc_result_t result = ISC_R_SUCCESS;
const cfg_obj_t *obj;
const char *name, *library;
/* Get the name of the dyndb instance and the library path . */
name = cfg_obj_asstring(cfg_tuple_get(dyndb, "name"));
library = cfg_obj_asstring(cfg_tuple_get(dyndb, "library"));
obj = cfg_tuple_get(dyndb, "parameters");
if (obj != NULL) {
result = dns_dyndb_load(library, name, cfg_obj_asstring(obj),
cfg_obj_file(obj), cfg_obj_line(obj),
mctx, dctx);
}
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dynamic database '%s' configuration failed: %s",
name, isc_result_totext(result));
}
return (result);
}
#endif /* ifdef HAVE_DLOPEN */
static isc_result_t
disable_algorithms(const cfg_obj_t *disabled, dns_resolver_t *resolver) {
isc_result_t result;
const cfg_obj_t *algorithms;
const cfg_listelt_t *element;
const char *str;
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t b;
name = dns_fixedname_initname(&fixed);
str = cfg_obj_asstring(cfg_tuple_get(disabled, "name"));
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
algorithms = cfg_tuple_get(disabled, "algorithms");
for (element = cfg_list_first(algorithms); element != NULL;
element = cfg_list_next(element))
{
isc_textregion_t r;
dns_secalg_t alg;
DE_CONST(cfg_obj_asstring(cfg_listelt_value(element)), r.base);
r.length = strlen(r.base);
result = dns_secalg_fromtext(&alg, &r);
if (result != ISC_R_SUCCESS) {
uint8_t ui;
result = isc_parse_uint8(&ui, r.base, 10);
alg = ui;
}
if (result != ISC_R_SUCCESS) {
cfg_obj_log(cfg_listelt_value(element), named_g_lctx,
ISC_LOG_ERROR, "invalid algorithm");
CHECK(result);
}
CHECK(dns_resolver_disable_algorithm(resolver, name, alg));
}
cleanup:
return (result);
}
static isc_result_t
disable_ds_digests(const cfg_obj_t *disabled, dns_resolver_t *resolver) {
isc_result_t result;
const cfg_obj_t *digests;
const cfg_listelt_t *element;
const char *str;
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t b;
name = dns_fixedname_initname(&fixed);
str = cfg_obj_asstring(cfg_tuple_get(disabled, "name"));
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
digests = cfg_tuple_get(disabled, "digests");
for (element = cfg_list_first(digests); element != NULL;
element = cfg_list_next(element))
{
isc_textregion_t r;
dns_dsdigest_t digest;
DE_CONST(cfg_obj_asstring(cfg_listelt_value(element)), r.base);
r.length = strlen(r.base);
/* disable_ds_digests handles numeric values. */
result = dns_dsdigest_fromtext(&digest, &r);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(cfg_listelt_value(element), named_g_lctx,
ISC_LOG_ERROR, "invalid algorithm");
CHECK(result);
}
CHECK(dns_resolver_disable_ds_digest(resolver, name, digest));
}
cleanup:
return (result);
}
static bool
on_disable_list(const cfg_obj_t *disablelist, dns_name_t *zonename) {
const cfg_listelt_t *element;
dns_fixedname_t fixed;
dns_name_t *name;
isc_result_t result;
const cfg_obj_t *value;
const char *str;
isc_buffer_t b;
name = dns_fixedname_initname(&fixed);
for (element = cfg_list_first(disablelist); element != NULL;
element = cfg_list_next(element))
{
value = cfg_listelt_value(element);
str = cfg_obj_asstring(value);
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
result = dns_name_fromtext(name, &b, dns_rootname, 0, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (dns_name_equal(name, zonename)) {
return (true);
}
}
return (false);
}
static isc_result_t
check_dbtype(dns_zone_t *zone, unsigned int dbtypec, const char **dbargv,
isc_mem_t *mctx) {
char **argv = NULL;
unsigned int i;
isc_result_t result = ISC_R_SUCCESS;
CHECK(dns_zone_getdbtype(zone, &argv, mctx));
/*
* Check that all the arguments match.
*/
for (i = 0; i < dbtypec; i++) {
if (argv[i] == NULL || strcmp(argv[i], dbargv[i]) != 0) {
CHECK(ISC_R_FAILURE);
/*
* Check that there are not extra arguments.
*/
}
}
/*
* Check that there are not extra arguments.
*/
if (i == dbtypec && argv[i] != NULL) {
result = ISC_R_FAILURE;
}
cleanup:
isc_mem_free(mctx, argv);
return (result);
}
static isc_result_t
setquerystats(dns_zone_t *zone, isc_mem_t *mctx, dns_zonestat_level_t level) {
isc_result_t result;
isc_stats_t *zoneqrystats;
dns_zone_setstatlevel(zone, level);
zoneqrystats = NULL;
if (level == dns_zonestat_full) {
result = isc_stats_create(mctx, &zoneqrystats,
ns_statscounter_max);
if (result != ISC_R_SUCCESS) {
return (result);
}
}
dns_zone_setrequeststats(zone, zoneqrystats);
if (zoneqrystats != NULL) {
isc_stats_detach(&zoneqrystats);
}
return (ISC_R_SUCCESS);
}
static named_cache_t *
cachelist_find(named_cachelist_t *cachelist, const char *cachename,
dns_rdataclass_t rdclass) {
named_cache_t *nsc;
for (nsc = ISC_LIST_HEAD(*cachelist); nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link))
{
if (nsc->rdclass == rdclass &&
strcmp(dns_cache_getname(nsc->cache), cachename) == 0)
{
return (nsc);
}
}
return (NULL);
}
static bool
cache_reusable(dns_view_t *originview, dns_view_t *view,
bool new_zero_no_soattl) {
if (originview->rdclass != view->rdclass ||
originview->checknames != view->checknames ||
dns_resolver_getzeronosoattl(originview->resolver) !=
new_zero_no_soattl ||
originview->acceptexpired != view->acceptexpired ||
originview->enablevalidation != view->enablevalidation ||
originview->maxcachettl != view->maxcachettl ||
originview->maxncachettl != view->maxncachettl)
{
return (false);
}
return (true);
}
static bool
cache_sharable(dns_view_t *originview, dns_view_t *view,
bool new_zero_no_soattl, uint64_t new_max_cache_size,
uint32_t new_stale_ttl) {
/*
* If the cache cannot even reused for the same view, it cannot be
* shared with other views.
*/
if (!cache_reusable(originview, view, new_zero_no_soattl)) {
return (false);
}
/*
* Check other cache related parameters that must be consistent among
* the sharing views.
*/
if (dns_cache_getservestalettl(originview->cache) != new_stale_ttl ||
dns_cache_getcachesize(originview->cache) != new_max_cache_size)
{
return (false);
}
return (true);
}
/*
* Callback from DLZ configure when the driver sets up a writeable zone
*/
static isc_result_t
dlzconfigure_callback(dns_view_t *view, dns_dlzdb_t *dlzdb, dns_zone_t *zone) {
dns_name_t *origin = dns_zone_getorigin(zone);
dns_rdataclass_t zclass = view->rdclass;
isc_result_t result;
result = dns_zonemgr_managezone(named_g_server->zonemgr, zone);
if (result != ISC_R_SUCCESS) {
return (result);
}
dns_zone_setstats(zone, named_g_server->zonestats);
return (named_zone_configure_writeable_dlz(dlzdb, zone, zclass,
origin));
}
static isc_result_t
dns64_reverse(dns_view_t *view, isc_mem_t *mctx, isc_netaddr_t *na,
unsigned int prefixlen, const char *server, const char *contact) {
char reverse[48 + sizeof("ip6.arpa.")] = { 0 };
char buf[sizeof("x.x.")];
const char *dns64_dbtype[4] = { "_dns64", "dns64", ".", "." };
const char *sep = ": view ";
const char *viewname = view->name;
const unsigned char *s6;
dns_fixedname_t fixed;
dns_name_t *name;
dns_zone_t *zone = NULL;
int dns64_dbtypec = 4;
isc_buffer_t b;
isc_result_t result;
REQUIRE(prefixlen == 32 || prefixlen == 40 || prefixlen == 48 ||
prefixlen == 56 || prefixlen == 64 || prefixlen == 96);
if (!strcmp(viewname, "_default")) {
sep = "";
viewname = "";
}
/*
* Construct the reverse name of the zone.
*/
s6 = na->type.in6.s6_addr;
while (prefixlen > 0) {
prefixlen -= 8;
snprintf(buf, sizeof(buf), "%x.%x.", s6[prefixlen / 8] & 0xf,
(s6[prefixlen / 8] >> 4) & 0xf);
strlcat(reverse, buf, sizeof(reverse));
}
strlcat(reverse, "ip6.arpa.", sizeof(reverse));
/*
* Create the actual zone.
*/
if (server != NULL) {
dns64_dbtype[2] = server;
}
if (contact != NULL) {
dns64_dbtype[3] = contact;
}
name = dns_fixedname_initname(&fixed);
isc_buffer_constinit(&b, reverse, strlen(reverse));
isc_buffer_add(&b, strlen(reverse));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
CHECK(dns_zone_create(&zone, mctx));
CHECK(dns_zone_setorigin(zone, name));
dns_zone_setview(zone, view);
CHECK(dns_zonemgr_managezone(named_g_server->zonemgr, zone));
dns_zone_setclass(zone, view->rdclass);
dns_zone_settype(zone, dns_zone_master);
dns_zone_setstats(zone, named_g_server->zonestats);
dns_zone_setdbtype(zone, dns64_dbtypec, dns64_dbtype);
if (view->queryacl != NULL) {
dns_zone_setqueryacl(zone, view->queryacl);
}
if (view->queryonacl != NULL) {
dns_zone_setqueryonacl(zone, view->queryonacl);
}
dns_zone_setdialup(zone, dns_dialuptype_no);
dns_zone_setnotifytype(zone, dns_notifytype_no);
dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, true);
CHECK(setquerystats(zone, mctx, dns_zonestat_none)); /* XXXMPA */
CHECK(dns_view_addzone(view, zone));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"dns64 reverse zone%s%s: %s", sep, viewname, reverse);
cleanup:
if (zone != NULL) {
dns_zone_detach(&zone);
}
return (result);
}
#ifdef USE_DNSRPS
typedef struct conf_dnsrps_ctx conf_dnsrps_ctx_t;
struct conf_dnsrps_ctx {
isc_result_t result;
char *cstr;
size_t cstr_size;
isc_mem_t *mctx;
};
/*
* Add to the DNSRPS configuration string.
*/
static bool
conf_dnsrps_sadd(conf_dnsrps_ctx_t *ctx, const char *p, ...) {
size_t new_len, cur_len, new_cstr_size;
char *new_cstr;
va_list args;
if (ctx->cstr == NULL) {
ctx->cstr = isc_mem_get(ctx->mctx, 256);
ctx->cstr[0] = '\0';
ctx->cstr_size = 256;
}
cur_len = strlen(ctx->cstr);
va_start(args, p);
new_len = vsnprintf(ctx->cstr + cur_len, ctx->cstr_size - cur_len, p,
args) +
1;
va_end(args);
if (cur_len + new_len <= ctx->cstr_size) {
return (true);
}
new_cstr_size = ((cur_len + new_len) / 256 + 1) * 256;
new_cstr = isc_mem_get(ctx->mctx, new_cstr_size);
memmove(new_cstr, ctx->cstr, cur_len);
isc_mem_put(ctx->mctx, ctx->cstr, ctx->cstr_size);
ctx->cstr_size = new_cstr_size;
ctx->cstr = new_cstr;
/* cannot use args twice after a single va_start()on some systems */
va_start(args, p);
vsnprintf(ctx->cstr + cur_len, ctx->cstr_size - cur_len, p, args);
va_end(args);
return (true);
}
/*
* Get an DNSRPS configuration value using the global and view options
* for the default. Return false upon failure.
*/
static bool
conf_dnsrps_get(const cfg_obj_t **sub_obj, const cfg_obj_t **maps,
const cfg_obj_t *obj, const char *name,
conf_dnsrps_ctx_t *ctx) {
if (ctx != NULL && ctx->result != ISC_R_SUCCESS) {
*sub_obj = NULL;
return (false);
}
*sub_obj = cfg_tuple_get(obj, name);
if (cfg_obj_isvoid(*sub_obj)) {
*sub_obj = NULL;
if (maps != NULL &&
ISC_R_SUCCESS != named_config_get(maps, name, sub_obj)) {
*sub_obj = NULL;
}
}
return (true);
}
/*
* Handle a DNSRPS boolean configuration value with the global and view
* options providing the default.
*/
static void
conf_dnsrps_yes_no(const cfg_obj_t *obj, const char *name,
conf_dnsrps_ctx_t *ctx) {
const cfg_obj_t *sub_obj;
if (!conf_dnsrps_get(&sub_obj, NULL, obj, name, ctx)) {
return;
}
if (sub_obj == NULL) {
return;
}
if (ctx == NULL) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"\"%s\" without \"dnsrps-enable yes\"", name);
return;
}
conf_dnsrps_sadd(ctx, " %s %s", name,
cfg_obj_asboolean(sub_obj) ? "yes" : "no");
}
static void
conf_dnsrps_num(const cfg_obj_t *obj, const char *name,
conf_dnsrps_ctx_t *ctx) {
const cfg_obj_t *sub_obj;
if (!conf_dnsrps_get(&sub_obj, NULL, obj, name, ctx)) {
return;
}
if (sub_obj == NULL) {
return;
}
if (ctx == NULL) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"\"%s\" without \"dnsrps-enable yes\"", name);
return;
}
if (cfg_obj_isduration(sub_obj)) {
conf_dnsrps_sadd(ctx, " %s %d", name,
cfg_obj_asduration(sub_obj));
} else {
conf_dnsrps_sadd(ctx, " %s %d", name,
cfg_obj_asuint32(sub_obj));
}
}
/*
* Convert the parsed RPZ configuration statement to a string for
* dns_rpz_new_zones().
*/
static isc_result_t
conf_dnsrps(dns_view_t *view, const cfg_obj_t **maps, bool nsip_enabled,
bool nsdname_enabled, dns_rpz_zbits_t *nsip_on,
dns_rpz_zbits_t *nsdname_on, char **rps_cstr, size_t *rps_cstr_size,
const cfg_obj_t *rpz_obj, const cfg_listelt_t *zone_element) {
conf_dnsrps_ctx_t ctx;
const cfg_obj_t *zone_obj, *obj;
dns_rpz_num_t rpz_num;
bool on;
const char *s;
memset(&ctx, 0, sizeof(ctx));
ctx.result = ISC_R_SUCCESS;
ctx.mctx = view->mctx;
for (rpz_num = 0; zone_element != NULL && ctx.result == ISC_R_SUCCESS;
++rpz_num)
{
zone_obj = cfg_listelt_value(zone_element);
s = cfg_obj_asstring(cfg_tuple_get(zone_obj, "zone name"));
conf_dnsrps_sadd(&ctx, "zone \"%s\"", s);
obj = cfg_tuple_get(zone_obj, "policy");
if (!cfg_obj_isvoid(obj)) {
s = cfg_obj_asstring(cfg_tuple_get(obj, "policy name"));
conf_dnsrps_sadd(&ctx, " policy %s", s);
if (strcasecmp(s, "cname") == 0) {
s = cfg_obj_asstring(
cfg_tuple_get(obj, "cname"));
conf_dnsrps_sadd(&ctx, " %s", s);
}
}
conf_dnsrps_yes_no(zone_obj, "recursive-only", &ctx);
conf_dnsrps_yes_no(zone_obj, "log", &ctx);
conf_dnsrps_num(zone_obj, "max-policy-ttl", &ctx);
obj = cfg_tuple_get(rpz_obj, "nsip-enable");
if (!cfg_obj_isvoid(obj)) {
if (cfg_obj_asboolean(obj)) {
*nsip_on |= DNS_RPZ_ZBIT(rpz_num);
} else {
*nsip_on &= ~DNS_RPZ_ZBIT(rpz_num);
}
}
on = ((*nsip_on & DNS_RPZ_ZBIT(rpz_num)) != 0);
if (nsip_enabled != on) {
conf_dnsrps_sadd(&ctx, on ? " nsip-enable yes "
: " nsip-enable no ");
}
obj = cfg_tuple_get(rpz_obj, "nsdname-enable");
if (!cfg_obj_isvoid(obj)) {
if (cfg_obj_asboolean(obj)) {
*nsdname_on |= DNS_RPZ_ZBIT(rpz_num);
} else {
*nsdname_on &= ~DNS_RPZ_ZBIT(rpz_num);
}
}
on = ((*nsdname_on & DNS_RPZ_ZBIT(rpz_num)) != 0);
if (nsdname_enabled != on) {
conf_dnsrps_sadd(&ctx, on ? " nsdname-enable yes "
: " nsdname-enable no ");
}
conf_dnsrps_sadd(&ctx, ";\n");
zone_element = cfg_list_next(zone_element);
}
conf_dnsrps_yes_no(rpz_obj, "recursive-only", &ctx);
conf_dnsrps_num(rpz_obj, "max-policy-ttl", &ctx);
conf_dnsrps_num(rpz_obj, "min-ns-dots", &ctx);
conf_dnsrps_yes_no(rpz_obj, "qname-wait-recurse", &ctx);
conf_dnsrps_yes_no(rpz_obj, "break-dnssec", &ctx);
if (!nsip_enabled) {
conf_dnsrps_sadd(&ctx, " nsip-enable no ");
}
if (!nsdname_enabled) {
conf_dnsrps_sadd(&ctx, " nsdname-enable no ");
}
/*
* Get the general dnsrpzd parameters from the response-policy
* statement in the view and the general options.
*/
if (conf_dnsrps_get(&obj, maps, rpz_obj, "dnsrps-options", &ctx) &&
obj != NULL) {
conf_dnsrps_sadd(&ctx, " %s\n", cfg_obj_asstring(obj));
}
if (ctx.result == ISC_R_SUCCESS) {
*rps_cstr = ctx.cstr;
*rps_cstr_size = ctx.cstr_size;
} else {
if (ctx.cstr != NULL) {
isc_mem_put(ctx.mctx, ctx.cstr, ctx.cstr_size);
}
*rps_cstr = NULL;
*rps_cstr_size = 0;
}
return (ctx.result);
}
#endif /* ifdef USE_DNSRPS */
static isc_result_t
configure_rpz_name(dns_view_t *view, const cfg_obj_t *obj, dns_name_t *name,
const char *str, const char *msg) {
isc_result_t result;
result = dns_name_fromstring(name, str, DNS_NAME_DOWNCASE, view->mctx);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(obj, named_g_lctx, DNS_RPZ_ERROR_LEVEL,
"invalid %s '%s'", msg, str);
}
return (result);
}
static isc_result_t
configure_rpz_name2(dns_view_t *view, const cfg_obj_t *obj, dns_name_t *name,
const char *str, const dns_name_t *origin) {
isc_result_t result;
result = dns_name_fromstring2(name, str, origin, DNS_NAME_DOWNCASE,
view->mctx);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(obj, named_g_lctx, DNS_RPZ_ERROR_LEVEL,
"invalid zone '%s'", str);
}
return (result);
}
static isc_result_t
configure_rpz_zone(dns_view_t *view, const cfg_listelt_t *element,
bool recursive_only_default, bool add_soa_default,
dns_ttl_t ttl_default, uint32_t minupdateinterval_default,
const dns_rpz_zone_t *old, bool *old_rpz_okp) {
const cfg_obj_t *rpz_obj, *obj;
const char *str;
dns_rpz_zone_t *zone = NULL;
isc_result_t result;
dns_rpz_num_t rpz_num;
REQUIRE(old != NULL || !*old_rpz_okp);
rpz_obj = cfg_listelt_value(element);
if (view->rpzs->p.num_zones >= DNS_RPZ_MAX_ZONES) {
cfg_obj_log(rpz_obj, named_g_lctx, DNS_RPZ_ERROR_LEVEL,
"limit of %d response policy zones exceeded",
DNS_RPZ_MAX_ZONES);
return (ISC_R_FAILURE);
}
result = dns_rpz_new_zone(view->rpzs, &zone);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(rpz_obj, named_g_lctx, DNS_RPZ_ERROR_LEVEL,
"Error creating new RPZ zone : %s",
isc_result_totext(result));
return (result);
}
obj = cfg_tuple_get(rpz_obj, "recursive-only");
if (cfg_obj_isvoid(obj) ? recursive_only_default
: cfg_obj_asboolean(obj)) {
view->rpzs->p.no_rd_ok &= ~DNS_RPZ_ZBIT(zone->num);
} else {
view->rpzs->p.no_rd_ok |= DNS_RPZ_ZBIT(zone->num);
}
obj = cfg_tuple_get(rpz_obj, "log");
if (!cfg_obj_isvoid(obj) && !cfg_obj_asboolean(obj)) {
view->rpzs->p.no_log |= DNS_RPZ_ZBIT(zone->num);
} else {
view->rpzs->p.no_log &= ~DNS_RPZ_ZBIT(zone->num);
}
obj = cfg_tuple_get(rpz_obj, "max-policy-ttl");
if (cfg_obj_isduration(obj)) {
zone->max_policy_ttl = cfg_obj_asduration(obj);
} else {
zone->max_policy_ttl = ttl_default;
}
obj = cfg_tuple_get(rpz_obj, "min-update-interval");
if (cfg_obj_isduration(obj)) {
zone->min_update_interval = cfg_obj_asduration(obj);
} else {
zone->min_update_interval = minupdateinterval_default;
}
if (*old_rpz_okp && zone->max_policy_ttl != old->max_policy_ttl) {
*old_rpz_okp = false;
}
str = cfg_obj_asstring(cfg_tuple_get(rpz_obj, "zone name"));
result = configure_rpz_name(view, rpz_obj, &zone->origin, str, "zone");
if (result != ISC_R_SUCCESS) {
return (result);
}
if (dns_name_equal(&zone->origin, dns_rootname)) {
cfg_obj_log(rpz_obj, named_g_lctx, DNS_RPZ_ERROR_LEVEL,
"invalid zone name '%s'", str);
return (DNS_R_EMPTYLABEL);
}
if (!view->rpzs->p.dnsrps_enabled) {
for (rpz_num = 0; rpz_num < view->rpzs->p.num_zones - 1;
++rpz_num) {
if (dns_name_equal(&view->rpzs->zones[rpz_num]->origin,
&zone->origin)) {
cfg_obj_log(rpz_obj, named_g_lctx,
DNS_RPZ_ERROR_LEVEL,
"duplicate '%s'", str);
result = DNS_R_DUPLICATE;
return (result);
}
}
}
if (*old_rpz_okp && !dns_name_equal(&old->origin, &zone->origin)) {
*old_rpz_okp = false;
}
result = configure_rpz_name2(view, rpz_obj, &zone->client_ip,
DNS_RPZ_CLIENT_IP_ZONE, &zone->origin);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = configure_rpz_name2(view, rpz_obj, &zone->ip, DNS_RPZ_IP_ZONE,
&zone->origin);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = configure_rpz_name2(view, rpz_obj, &zone->nsdname,
DNS_RPZ_NSDNAME_ZONE, &zone->origin);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = configure_rpz_name2(view, rpz_obj, &zone->nsip,
DNS_RPZ_NSIP_ZONE, &zone->origin);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = configure_rpz_name(view, rpz_obj, &zone->passthru,
DNS_RPZ_PASSTHRU_NAME, "name");
if (result != ISC_R_SUCCESS) {
return (result);
}
result = configure_rpz_name(view, rpz_obj, &zone->drop,
DNS_RPZ_DROP_NAME, "name");
if (result != ISC_R_SUCCESS) {
return (result);
}
result = configure_rpz_name(view, rpz_obj, &zone->tcp_only,
DNS_RPZ_TCP_ONLY_NAME, "name");
if (result != ISC_R_SUCCESS) {
return (result);
}
obj = cfg_tuple_get(rpz_obj, "policy");
if (cfg_obj_isvoid(obj)) {
zone->policy = DNS_RPZ_POLICY_GIVEN;
} else {
str = cfg_obj_asstring(cfg_tuple_get(obj, "policy name"));
zone->policy = dns_rpz_str2policy(str);
INSIST(zone->policy != DNS_RPZ_POLICY_ERROR);
if (zone->policy == DNS_RPZ_POLICY_CNAME) {
str = cfg_obj_asstring(cfg_tuple_get(obj, "cname"));
result = configure_rpz_name(view, rpz_obj, &zone->cname,
str, "cname");
if (result != ISC_R_SUCCESS) {
return (result);
}
}
}
if (*old_rpz_okp && (zone->policy != old->policy ||
!dns_name_equal(&old->cname, &zone->cname)))
{
*old_rpz_okp = false;
}
obj = cfg_tuple_get(rpz_obj, "add-soa");
if (cfg_obj_isvoid(obj)) {
zone->addsoa = add_soa_default;
} else {
zone->addsoa = cfg_obj_asboolean(obj);
}
return (ISC_R_SUCCESS);
}
static isc_result_t
configure_rpz(dns_view_t *view, const cfg_obj_t **maps,
const cfg_obj_t *rpz_obj, bool *old_rpz_okp) {
bool dnsrps_enabled;
const cfg_listelt_t *zone_element;
char *rps_cstr;
size_t rps_cstr_size;
const cfg_obj_t *sub_obj;
bool recursive_only_default, add_soa_default;
bool nsip_enabled, nsdname_enabled;
dns_rpz_zbits_t nsip_on, nsdname_on;
dns_ttl_t ttl_default;
uint32_t minupdateinterval_default;
dns_rpz_zones_t *zones;
const dns_rpz_zones_t *old;
dns_view_t *pview;
const dns_rpz_zone_t *old_zone;
isc_result_t result;
int i;
*old_rpz_okp = false;
zone_element = cfg_list_first(cfg_tuple_get(rpz_obj, "zone list"));
if (zone_element == NULL) {
return (ISC_R_SUCCESS);
}
nsip_enabled = true;
sub_obj = cfg_tuple_get(rpz_obj, "nsip-enable");
if (!cfg_obj_isvoid(sub_obj)) {
nsip_enabled = cfg_obj_asboolean(sub_obj);
}
nsip_on = nsip_enabled ? DNS_RPZ_ALL_ZBITS : 0;
nsdname_enabled = true;
sub_obj = cfg_tuple_get(rpz_obj, "nsdname-enable");
if (!cfg_obj_isvoid(sub_obj)) {
nsdname_enabled = cfg_obj_asboolean(sub_obj);
}
nsdname_on = nsdname_enabled ? DNS_RPZ_ALL_ZBITS : 0;
/*
* "dnsrps-enable yes|no" can be either a global or response-policy
* clause.
*/
dnsrps_enabled = false;
rps_cstr = NULL;
rps_cstr_size = 0;
sub_obj = NULL;
(void)named_config_get(maps, "dnsrps-enable", &sub_obj);
if (sub_obj != NULL) {
dnsrps_enabled = cfg_obj_asboolean(sub_obj);
}
sub_obj = cfg_tuple_get(rpz_obj, "dnsrps-enable");
if (!cfg_obj_isvoid(sub_obj)) {
dnsrps_enabled = cfg_obj_asboolean(sub_obj);
}
#ifndef USE_DNSRPS
if (dnsrps_enabled) {
cfg_obj_log(rpz_obj, named_g_lctx, DNS_RPZ_ERROR_LEVEL,
"\"dnsrps-enable yes\" but"
" without `./configure --enable-dnsrps`");
return (ISC_R_FAILURE);
}
#else /* ifndef USE_DNSRPS */
if (dnsrps_enabled) {
if (librpz == NULL) {
cfg_obj_log(rpz_obj, named_g_lctx, DNS_RPZ_ERROR_LEVEL,
"\"dnsrps-enable yes\" but %s",
librpz_lib_open_emsg.c);
return (ISC_R_FAILURE);
}
/*
* Generate the DNS Response Policy Service
* configuration string.
*/
result = conf_dnsrps(view, maps, nsip_enabled, nsdname_enabled,
&nsip_on, &nsdname_on, &rps_cstr,
&rps_cstr_size, rpz_obj, zone_element);
if (result != ISC_R_SUCCESS) {
return (result);
}
}
#endif /* ifndef USE_DNSRPS */
result = dns_rpz_new_zones(&view->rpzs, rps_cstr, rps_cstr_size,
view->mctx, named_g_taskmgr,
named_g_timermgr);
if (result != ISC_R_SUCCESS) {
return (result);
}
zones = view->rpzs;
zones->p.nsip_on = nsip_on;
zones->p.nsdname_on = nsdname_on;
sub_obj = cfg_tuple_get(rpz_obj, "recursive-only");
if (!cfg_obj_isvoid(sub_obj) && !cfg_obj_asboolean(sub_obj)) {
recursive_only_default = false;
} else {
recursive_only_default = true;
}
sub_obj = cfg_tuple_get(rpz_obj, "add-soa");
if (!cfg_obj_isvoid(sub_obj) && !cfg_obj_asboolean(sub_obj)) {
add_soa_default = false;
} else {
add_soa_default = true;
}
sub_obj = cfg_tuple_get(rpz_obj, "break-dnssec");
if (!cfg_obj_isvoid(sub_obj) && cfg_obj_asboolean(sub_obj)) {
zones->p.break_dnssec = true;
} else {
zones->p.break_dnssec = false;
}
sub_obj = cfg_tuple_get(rpz_obj, "max-policy-ttl");
if (cfg_obj_isduration(sub_obj)) {
ttl_default = cfg_obj_asduration(sub_obj);
} else {
ttl_default = DNS_RPZ_MAX_TTL_DEFAULT;
}
sub_obj = cfg_tuple_get(rpz_obj, "min-update-interval");
if (cfg_obj_isduration(sub_obj)) {
minupdateinterval_default = cfg_obj_asduration(sub_obj);
} else {
minupdateinterval_default = DNS_RPZ_MINUPDATEINTERVAL_DEFAULT;
}
sub_obj = cfg_tuple_get(rpz_obj, "min-ns-dots");
if (cfg_obj_isuint32(sub_obj)) {
zones->p.min_ns_labels = cfg_obj_asuint32(sub_obj) + 1;
} else {
zones->p.min_ns_labels = 2;
}
sub_obj = cfg_tuple_get(rpz_obj, "qname-wait-recurse");
if (cfg_obj_isvoid(sub_obj) || cfg_obj_asboolean(sub_obj)) {
zones->p.qname_wait_recurse = true;
} else {
zones->p.qname_wait_recurse = false;
}
sub_obj = cfg_tuple_get(rpz_obj, "nsip-wait-recurse");
if (cfg_obj_isvoid(sub_obj) || cfg_obj_asboolean(sub_obj)) {
zones->p.nsip_wait_recurse = true;
} else {
zones->p.nsip_wait_recurse = false;
}
pview = NULL;
result = dns_viewlist_find(&named_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result == ISC_R_SUCCESS) {
old = pview->rpzs;
} else {
old = NULL;
}
if (old == NULL) {
*old_rpz_okp = false;
} else {
*old_rpz_okp = true;
}
for (i = 0; zone_element != NULL;
++i, zone_element = cfg_list_next(zone_element))
{
INSIST(!*old_rpz_okp || old != NULL);
if (*old_rpz_okp && i < old->p.num_zones) {
old_zone = old->zones[i];
} else {
*old_rpz_okp = false;
old_zone = NULL;
}
result = configure_rpz_zone(
view, zone_element, recursive_only_default,
add_soa_default, ttl_default, minupdateinterval_default,
old_zone, old_rpz_okp);
if (result != ISC_R_SUCCESS) {
if (pview != NULL) {
dns_view_detach(&pview);
}
return (result);
}
}
/*
* If this is a reloading and the parameters and list of policy
* zones are unchanged, then use the same policy data.
* Data for individual zones that must be reloaded will be merged.
*/
if (*old_rpz_okp) {
if (old != NULL &&
memcmp(&old->p, &zones->p, sizeof(zones->p)) != 0) {
*old_rpz_okp = false;
} else if ((old == NULL || old->rps_cstr == NULL) !=
(zones->rps_cstr == NULL)) {
*old_rpz_okp = false;
} else if (old != NULL && zones->rps_cstr != NULL &&
strcmp(old->rps_cstr, zones->rps_cstr) != 0)
{
*old_rpz_okp = false;
}
}
if (*old_rpz_okp) {
dns_rpz_detach_rpzs(&view->rpzs);
dns_rpz_attach_rpzs(pview->rpzs, &view->rpzs);
} else if (old != NULL && pview != NULL) {
++pview->rpzs->rpz_ver;
view->rpzs->rpz_ver = pview->rpzs->rpz_ver;
cfg_obj_log(rpz_obj, named_g_lctx, DNS_RPZ_DEBUG_LEVEL1,
"updated RPZ policy: version %d",
view->rpzs->rpz_ver);
}
if (pview != NULL) {
dns_view_detach(&pview);
}
return (ISC_R_SUCCESS);
}
static void
catz_addmodzone_taskaction(isc_task_t *task, isc_event_t *event0) {
catz_chgzone_event_t *ev = (catz_chgzone_event_t *)event0;
isc_result_t result;
isc_buffer_t namebuf;
isc_buffer_t *confbuf;
char nameb[DNS_NAME_FORMATSIZE];
const cfg_obj_t *zlist = NULL;
cfg_obj_t *zoneconf = NULL;
cfg_obj_t *zoneobj = NULL;
ns_cfgctx_t *cfg;
dns_zone_t *zone = NULL;
cfg = (ns_cfgctx_t *)ev->view->new_zone_config;
if (cfg == NULL) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"catz: allow-new-zones statement missing from "
"config; cannot add zone from the catalog");
goto cleanup;
}
isc_buffer_init(&namebuf, nameb, DNS_NAME_FORMATSIZE);
dns_name_totext(dns_catz_entry_getname(ev->entry), true, &namebuf);
isc_buffer_putuint8(&namebuf, 0);
/* Zone shouldn't already exist */
result = dns_zt_find(ev->view->zonetable,
dns_catz_entry_getname(ev->entry), 0, NULL, &zone);
if (ev->mod == true) {
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: error \"%s\" while trying to "
"modify zone \"%s\"",
isc_result_totext(result), nameb);
goto cleanup;
} else {
if (!dns_zone_getadded(zone)) {
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: "
"catz_addmodzone_taskaction: "
"zone '%s' is not a dynamically "
"added zone",
nameb);
goto cleanup;
}
if (dns_zone_get_parentcatz(zone) != ev->origin) {
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: catz_delzone_taskaction: "
"zone '%s' exists in multiple "
"catalog zones",
nameb);
goto cleanup;
}
dns_zone_detach(&zone);
}
} else {
if (result == ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"catz: zone \"%s\" is overridden "
"by explicitly configured zone",
nameb);
goto cleanup;
} else if (result != ISC_R_NOTFOUND &&
result != DNS_R_PARTIALMATCH) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: error \"%s\" while trying to "
"add zone \"%s\"",
isc_result_totext(result), nameb);
goto cleanup;
} else { /* this can happen in case of DNS_R_PARTIALMATCH */
if (zone != NULL) {
dns_zone_detach(&zone);
}
}
}
RUNTIME_CHECK(zone == NULL);
/* Create a config for new zone */
confbuf = NULL;
result = dns_catz_generate_zonecfg(ev->origin, ev->entry, &confbuf);
if (result == ISC_R_SUCCESS) {
cfg_parser_reset(cfg->add_parser);
result = cfg_parse_buffer(cfg->add_parser, confbuf, "catz", 0,
&cfg_type_addzoneconf, 0, &zoneconf);
isc_buffer_free(&confbuf);
}
/*
* Fail if either dns_catz_generate_zonecfg() or cfg_parse_buffer3()
* failed.
*/
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"catz: error \"%s\" while trying to generate "
"config for zone \"%s\"",
isc_result_totext(result), nameb);
goto cleanup;
}
CHECK(cfg_map_get(zoneconf, "zone", &zlist));
if (!cfg_obj_islist(zlist)) {
CHECK(ISC_R_FAILURE);
}
/* For now we only support adding one zone at a time */
zoneobj = cfg_listelt_value(cfg_list_first(zlist));
/* Mark view unfrozen so that zone can be added */
result = isc_task_beginexclusive(task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_view_thaw(ev->view);
result = configure_zone(
cfg->config, zoneobj, cfg->vconfig, ev->cbd->server->mctx,
ev->view, &ev->cbd->server->viewlist,
&ev->cbd->server->kasplist, cfg->actx, true, false, ev->mod);
dns_view_freeze(ev->view);
isc_task_endexclusive(task);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: failed to configure zone \"%s\" - %d",
nameb, result);
goto cleanup;
}
/* Is it there yet? */
CHECK(dns_zt_find(ev->view->zonetable,
dns_catz_entry_getname(ev->entry), 0, NULL, &zone));
/*
* Load the zone from the master file. If this fails, we'll
* need to undo the configuration we've done already.
*/
result = dns_zone_load(zone, true);
if (result != ISC_R_SUCCESS) {
dns_db_t *dbp = NULL;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"catz: dns_zone_load() failed "
"with %s; reverting.",
isc_result_totext(result));
/* If the zone loaded partially, unload it */
if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(zone);
}
/* Remove the zone from the zone table */
dns_zt_unmount(ev->view->zonetable, zone);
goto cleanup;
}
/* Flag the zone as having been added at runtime */
dns_zone_setadded(zone, true);
dns_zone_set_parentcatz(zone, ev->origin);
cleanup:
if (zone != NULL) {
dns_zone_detach(&zone);
}
if (zoneconf != NULL) {
cfg_obj_destroy(cfg->add_parser, &zoneconf);
}
dns_catz_entry_detach(ev->origin, &ev->entry);
dns_catz_zone_detach(&ev->origin);
dns_view_detach(&ev->view);
isc_event_free(ISC_EVENT_PTR(&ev));
}
static void
catz_delzone_taskaction(isc_task_t *task, isc_event_t *event0) {
catz_chgzone_event_t *ev = (catz_chgzone_event_t *)event0;
isc_result_t result;
dns_zone_t *zone = NULL;
dns_db_t *dbp = NULL;
char cname[DNS_NAME_FORMATSIZE];
const char *file;
result = isc_task_beginexclusive(task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_name_format(dns_catz_entry_getname(ev->entry), cname,
DNS_NAME_FORMATSIZE);
result = dns_zt_find(ev->view->zonetable,
dns_catz_entry_getname(ev->entry), 0, NULL, &zone);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: catz_delzone_taskaction: "
"zone '%s' not found",
cname);
goto cleanup;
}
if (!dns_zone_getadded(zone)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: catz_delzone_taskaction: "
"zone '%s' is not a dynamically added zone",
cname);
goto cleanup;
}
if (dns_zone_get_parentcatz(zone) != ev->origin) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: catz_delzone_taskaction: zone "
"'%s' exists in multiple catalog zones",
cname);
goto cleanup;
}
/* Stop answering for this zone */
if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(zone);
}
CHECK(dns_zt_unmount(ev->view->zonetable, zone));
file = dns_zone_getfile(zone);
if (file != NULL) {
isc_file_remove(file);
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"catz: catz_delzone_taskaction: "
"zone '%s' deleted",
cname);
cleanup:
isc_task_endexclusive(task);
if (zone != NULL) {
dns_zone_detach(&zone);
}
dns_catz_entry_detach(ev->origin, &ev->entry);
dns_catz_zone_detach(&ev->origin);
dns_view_detach(&ev->view);
isc_event_free(ISC_EVENT_PTR(&ev));
}
static isc_result_t
catz_create_chg_task(dns_catz_entry_t *entry, dns_catz_zone_t *origin,
dns_view_t *view, isc_taskmgr_t *taskmgr, void *udata,
isc_eventtype_t type) {
catz_chgzone_event_t *event;
isc_task_t *task;
isc_result_t result;
isc_taskaction_t action = NULL;
switch (type) {
case DNS_EVENT_CATZADDZONE:
case DNS_EVENT_CATZMODZONE:
action = catz_addmodzone_taskaction;
break;
case DNS_EVENT_CATZDELZONE:
action = catz_delzone_taskaction;
break;
default:
REQUIRE(0);
}
event = (catz_chgzone_event_t *)isc_event_allocate(
view->mctx, origin, type, action, NULL, sizeof(*event));
event->cbd = (catz_cb_data_t *)udata;
event->entry = NULL;
event->origin = NULL;
event->view = NULL;
event->mod = (type == DNS_EVENT_CATZMODZONE);
dns_catz_entry_attach(entry, &event->entry);
dns_catz_zone_attach(origin, &event->origin);
dns_view_attach(view, &event->view);
task = NULL;
result = isc_taskmgr_excltask(taskmgr, &task);
REQUIRE(result == ISC_R_SUCCESS);
isc_task_send(task, ISC_EVENT_PTR(&event));
isc_task_detach(&task);
return (ISC_R_SUCCESS);
}
static isc_result_t
catz_addzone(dns_catz_entry_t *entry, dns_catz_zone_t *origin, dns_view_t *view,
isc_taskmgr_t *taskmgr, void *udata) {
return (catz_create_chg_task(entry, origin, view, taskmgr, udata,
DNS_EVENT_CATZADDZONE));
}
static isc_result_t
catz_delzone(dns_catz_entry_t *entry, dns_catz_zone_t *origin, dns_view_t *view,
isc_taskmgr_t *taskmgr, void *udata) {
return (catz_create_chg_task(entry, origin, view, taskmgr, udata,
DNS_EVENT_CATZDELZONE));
}
static isc_result_t
catz_modzone(dns_catz_entry_t *entry, dns_catz_zone_t *origin, dns_view_t *view,
isc_taskmgr_t *taskmgr, void *udata) {
return (catz_create_chg_task(entry, origin, view, taskmgr, udata,
DNS_EVENT_CATZMODZONE));
}
static isc_result_t
configure_catz_zone(dns_view_t *view, const cfg_obj_t *config,
const cfg_listelt_t *element) {
const cfg_obj_t *catz_obj, *obj;
dns_catz_zone_t *zone = NULL;
const char *str;
isc_result_t result;
dns_name_t origin;
dns_catz_options_t *opts;
dns_view_t *pview = NULL;
dns_name_init(&origin, NULL);
catz_obj = cfg_listelt_value(element);
str = cfg_obj_asstring(cfg_tuple_get(catz_obj, "zone name"));
result = dns_name_fromstring(&origin, str, DNS_NAME_DOWNCASE,
view->mctx);
if (result == ISC_R_SUCCESS && dns_name_equal(&origin, dns_rootname)) {
result = DNS_R_EMPTYLABEL;
}
if (result != ISC_R_SUCCESS) {
cfg_obj_log(catz_obj, named_g_lctx, DNS_CATZ_ERROR_LEVEL,
"catz: invalid zone name '%s'", str);
goto cleanup;
}
result = dns_catz_add_zone(view->catzs, &origin, &zone);
if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) {
cfg_obj_log(catz_obj, named_g_lctx, DNS_CATZ_ERROR_LEVEL,
"catz: unable to create catalog zone '%s', "
"error %s",
str, isc_result_totext(result));
goto cleanup;
}
if (result == ISC_R_EXISTS) {
isc_ht_iter_t *it = NULL;
result = dns_viewlist_find(&named_g_server->viewlist,
view->name, view->rdclass, &pview);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/*
* xxxwpk todo: reconfigure the zone!!!!
*/
cfg_obj_log(catz_obj, named_g_lctx, DNS_CATZ_ERROR_LEVEL,
"catz: catalog zone '%s' will not be reconfigured",
str);
/*
* We have to walk through all the member zones and attach
* them to current view
*/
result = dns_catz_get_iterator(zone, &it);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(catz_obj, named_g_lctx,
DNS_CATZ_ERROR_LEVEL,
"catz: unable to create iterator");
goto cleanup;
}
for (result = isc_ht_iter_first(it); result == ISC_R_SUCCESS;
result = isc_ht_iter_next(it))
{
dns_name_t *name = NULL;
dns_zone_t *dnszone = NULL;
dns_catz_entry_t *entry = NULL;
isc_result_t tresult;
isc_ht_iter_current(it, (void **)&entry);
name = dns_catz_entry_getname(entry);
tresult = dns_view_findzone(pview, name, &dnszone);
RUNTIME_CHECK(tresult == ISC_R_SUCCESS);
dns_zone_setview(dnszone, view);
dns_view_addzone(view, dnszone);
/*
* The dns_view_findzone() call above increments the
* zone's reference count, which we need to decrement
* back. However, as dns_zone_detach() sets the
* supplied pointer to NULL, calling it is deferred
* until the dnszone variable is no longer used.
*/
dns_zone_detach(&dnszone);
}
isc_ht_iter_destroy(&it);
result = ISC_R_SUCCESS;
}
dns_catz_zone_resetdefoptions(zone);
opts = dns_catz_zone_getdefoptions(zone);
obj = cfg_tuple_get(catz_obj, "default-masters");
if (obj != NULL && cfg_obj_istuple(obj)) {
result = named_config_getipandkeylist(config, obj, view->mctx,
&opts->masters);
}
obj = cfg_tuple_get(catz_obj, "in-memory");
if (obj != NULL && cfg_obj_isboolean(obj)) {
opts->in_memory = cfg_obj_asboolean(obj);
}
obj = cfg_tuple_get(catz_obj, "zone-directory");
if (!opts->in_memory && obj != NULL && cfg_obj_isstring(obj)) {
opts->zonedir = isc_mem_strdup(view->mctx,
cfg_obj_asstring(obj));
if (isc_file_isdirectory(opts->zonedir) != ISC_R_SUCCESS) {
cfg_obj_log(obj, named_g_lctx, DNS_CATZ_ERROR_LEVEL,
"catz: zone-directory '%s' "
"not found; zone files will not be "
"saved",
opts->zonedir);
opts->in_memory = true;
}
}
obj = cfg_tuple_get(catz_obj, "min-update-interval");
if (obj != NULL && cfg_obj_isduration(obj)) {
opts->min_update_interval = cfg_obj_asduration(obj);
}
cleanup:
if (pview != NULL) {
dns_view_detach(&pview);
}
dns_name_free(&origin, view->mctx);
return (result);
}
static catz_cb_data_t ns_catz_cbdata;
static dns_catz_zonemodmethods_t ns_catz_zonemodmethods = {
catz_addzone, catz_modzone, catz_delzone, &ns_catz_cbdata
};
static isc_result_t
configure_catz(dns_view_t *view, const cfg_obj_t *config,
const cfg_obj_t *catz_obj) {
const cfg_listelt_t *zone_element;
const dns_catz_zones_t *old = NULL;
dns_view_t *pview = NULL;
isc_result_t result;
/* xxxwpk TODO do it cleaner, once, somewhere */
ns_catz_cbdata.server = named_g_server;
zone_element = cfg_list_first(cfg_tuple_get(catz_obj, "zone list"));
if (zone_element == NULL) {
return (ISC_R_SUCCESS);
}
CHECK(dns_catz_new_zones(&view->catzs, &ns_catz_zonemodmethods,
view->mctx, named_g_taskmgr,
named_g_timermgr));
result = dns_viewlist_find(&named_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result == ISC_R_SUCCESS) {
old = pview->catzs;
}
if (old != NULL) {
dns_catz_catzs_detach(&view->catzs);
dns_catz_catzs_attach(pview->catzs, &view->catzs);
dns_catz_prereconfig(view->catzs);
}
while (zone_element != NULL) {
CHECK(configure_catz_zone(view, config, zone_element));
zone_element = cfg_list_next(zone_element);
}
if (old != NULL) {
dns_catz_postreconfig(view->catzs);
}
result = ISC_R_SUCCESS;
cleanup:
if (pview != NULL) {
dns_view_detach(&pview);
}
return (result);
}
#define CHECK_RRL(cond, pat, val1, val2) \
do { \
if (!(cond)) { \
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR, pat, \
val1, val2); \
result = ISC_R_RANGE; \
goto cleanup; \
} \
} while (0)
#define CHECK_RRL_RATE(rate, def, max_rate, name) \
do { \
obj = NULL; \
rrl->rate.str = name; \
result = cfg_map_get(map, name, &obj); \
if (result == ISC_R_SUCCESS) { \
rrl->rate.r = cfg_obj_asuint32(obj); \
CHECK_RRL(rrl->rate.r <= max_rate, name " %d > %d", \
rrl->rate.r, max_rate); \
} else { \
rrl->rate.r = def; \
} \
rrl->rate.scaled = rrl->rate.r; \
} while (0)
static isc_result_t
configure_rrl(dns_view_t *view, const cfg_obj_t *config, const cfg_obj_t *map) {
const cfg_obj_t *obj;
dns_rrl_t *rrl;
isc_result_t result;
int min_entries, i, j;
/*
* Most DNS servers have few clients, but intentinally open
* recursive and authoritative servers often have many.
* So start with a small number of entries unless told otherwise
* to reduce cold-start costs.
*/
min_entries = 500;
obj = NULL;
result = cfg_map_get(map, "min-table-size", &obj);
if (result == ISC_R_SUCCESS) {
min_entries = cfg_obj_asuint32(obj);
if (min_entries < 1) {
min_entries = 1;
}
}
result = dns_rrl_init(&rrl, view, min_entries);
if (result != ISC_R_SUCCESS) {
return (result);
}
i = ISC_MAX(20000, min_entries);
obj = NULL;
result = cfg_map_get(map, "max-table-size", &obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
CHECK_RRL(i >= min_entries,
"max-table-size %d < min-table-size %d", i,
min_entries);
}
rrl->max_entries = i;
CHECK_RRL_RATE(responses_per_second, 0, DNS_RRL_MAX_RATE,
"responses-per-second");
CHECK_RRL_RATE(referrals_per_second, rrl->responses_per_second.r,
DNS_RRL_MAX_RATE, "referrals-per-second");
CHECK_RRL_RATE(nodata_per_second, rrl->responses_per_second.r,
DNS_RRL_MAX_RATE, "nodata-per-second");
CHECK_RRL_RATE(nxdomains_per_second, rrl->responses_per_second.r,
DNS_RRL_MAX_RATE, "nxdomains-per-second");
CHECK_RRL_RATE(errors_per_second, rrl->responses_per_second.r,
DNS_RRL_MAX_RATE, "errors-per-second");
CHECK_RRL_RATE(all_per_second, 0, DNS_RRL_MAX_RATE, "all-per-second");
CHECK_RRL_RATE(slip, 2, DNS_RRL_MAX_SLIP, "slip");
i = 15;
obj = NULL;
result = cfg_map_get(map, "window", &obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
CHECK_RRL(i >= 1 && i <= DNS_RRL_MAX_WINDOW,
"window %d < 1 or > %d", i, DNS_RRL_MAX_WINDOW);
}
rrl->window = i;
i = 0;
obj = NULL;
result = cfg_map_get(map, "qps-scale", &obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
CHECK_RRL(i >= 1, "invalid 'qps-scale %d'%s", i, "");
}
rrl->qps_scale = i;
rrl->qps = 1.0;
i = 24;
obj = NULL;
result = cfg_map_get(map, "ipv4-prefix-length", &obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
CHECK_RRL(i >= 8 && i <= 32,
"invalid 'ipv4-prefix-length %d'%s", i, "");
}
rrl->ipv4_prefixlen = i;
if (i == 32) {
rrl->ipv4_mask = 0xffffffff;
} else {
rrl->ipv4_mask = htonl(0xffffffff << (32 - i));
}
i = 56;
obj = NULL;
result = cfg_map_get(map, "ipv6-prefix-length", &obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
CHECK_RRL(i >= 16 && i <= DNS_RRL_MAX_PREFIX,
"ipv6-prefix-length %d < 16 or > %d", i,
DNS_RRL_MAX_PREFIX);
}
rrl->ipv6_prefixlen = i;
for (j = 0; j < 4; ++j) {
if (i <= 0) {
rrl->ipv6_mask[j] = 0;
} else if (i < 32) {
rrl->ipv6_mask[j] = htonl(0xffffffff << (32 - i));
} else {
rrl->ipv6_mask[j] = 0xffffffff;
}
i -= 32;
}
obj = NULL;
result = cfg_map_get(map, "exempt-clients", &obj);
if (result == ISC_R_SUCCESS) {
result = cfg_acl_fromconfig(obj, config, named_g_lctx,
named_g_aclconfctx, named_g_mctx, 0,
&rrl->exempt);
CHECK_RRL(result == ISC_R_SUCCESS, "invalid %s%s",
"address match list", "");
}
obj = NULL;
result = cfg_map_get(map, "log-only", &obj);
if (result == ISC_R_SUCCESS && cfg_obj_asboolean(obj)) {
rrl->log_only = true;
} else {
rrl->log_only = false;
}
return (ISC_R_SUCCESS);
cleanup:
dns_rrl_view_destroy(view);
return (result);
}
static isc_result_t
add_soa(dns_db_t *db, dns_dbversion_t *version, const dns_name_t *name,
const dns_name_t *origin, const dns_name_t *contact) {
dns_dbnode_t *node = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdatalist_t rdatalist;
dns_rdataset_t rdataset;
isc_result_t result;
unsigned char buf[DNS_SOA_BUFFERSIZE];
CHECK(dns_soa_buildrdata(origin, contact, dns_db_class(db), 0, 28800,
7200, 604800, 86400, buf, &rdata));
dns_rdatalist_init(&rdatalist);
rdatalist.type = rdata.type;
rdatalist.rdclass = rdata.rdclass;
rdatalist.ttl = 86400;
ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
dns_rdataset_init(&rdataset);
CHECK(dns_rdatalist_tordataset(&rdatalist, &rdataset));
CHECK(dns_db_findnode(db, name, true, &node));
CHECK(dns_db_addrdataset(db, node, version, 0, &rdataset, 0, NULL));
cleanup:
if (node != NULL) {
dns_db_detachnode(db, &node);
}
return (result);
}
static isc_result_t
add_ns(dns_db_t *db, dns_dbversion_t *version, const dns_name_t *name,
const dns_name_t *nsname) {
dns_dbnode_t *node = NULL;
dns_rdata_ns_t ns;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdatalist_t rdatalist;
dns_rdataset_t rdataset;
isc_result_t result;
isc_buffer_t b;
unsigned char buf[DNS_NAME_MAXWIRE];
isc_buffer_init(&b, buf, sizeof(buf));
ns.common.rdtype = dns_rdatatype_ns;
ns.common.rdclass = dns_db_class(db);
ns.mctx = NULL;
dns_name_init(&ns.name, NULL);
dns_name_clone(nsname, &ns.name);
CHECK(dns_rdata_fromstruct(&rdata, dns_db_class(db), dns_rdatatype_ns,
&ns, &b));
dns_rdatalist_init(&rdatalist);
rdatalist.type = rdata.type;
rdatalist.rdclass = rdata.rdclass;
rdatalist.ttl = 86400;
ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
dns_rdataset_init(&rdataset);
CHECK(dns_rdatalist_tordataset(&rdatalist, &rdataset));
CHECK(dns_db_findnode(db, name, true, &node));
CHECK(dns_db_addrdataset(db, node, version, 0, &rdataset, 0, NULL));
cleanup:
if (node != NULL) {
dns_db_detachnode(db, &node);
}
return (result);
}
static isc_result_t
create_empty_zone(dns_zone_t *zone, dns_name_t *name, dns_view_t *view,
const cfg_obj_t *zonelist, const char **empty_dbtype,
int empty_dbtypec, dns_zonestat_level_t statlevel) {
char namebuf[DNS_NAME_FORMATSIZE];
const cfg_listelt_t *element;
const cfg_obj_t *obj;
const cfg_obj_t *zconfig;
const cfg_obj_t *zoptions;
const char *rbt_dbtype[4] = { "rbt" };
const char *sep = ": view ";
const char *str;
const char *viewname = view->name;
dns_db_t *db = NULL;
dns_dbversion_t *version = NULL;
dns_fixedname_t cfixed;
dns_fixedname_t fixed;
dns_fixedname_t nsfixed;
dns_name_t *contact;
dns_name_t *ns;
dns_name_t *zname;
dns_zone_t *myzone = NULL;
int rbt_dbtypec = 1;
isc_result_t result;
dns_namereln_t namereln;
int order;
unsigned int nlabels;
zname = dns_fixedname_initname(&fixed);
ns = dns_fixedname_initname(&nsfixed);
contact = dns_fixedname_initname(&cfixed);
/*
* Look for forward "zones" beneath this empty zone and if so
* create a custom db for the empty zone.
*/
for (element = cfg_list_first(zonelist); element != NULL;
element = cfg_list_next(element))
{
zconfig = cfg_listelt_value(element);
str = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
CHECK(dns_name_fromstring(zname, str, 0, NULL));
namereln = dns_name_fullcompare(zname, name, &order, &nlabels);
if (namereln != dns_namereln_subdomain) {
continue;
}
zoptions = cfg_tuple_get(zconfig, "options");
obj = NULL;
(void)cfg_map_get(zoptions, "type", &obj);
if (obj != NULL &&
strcasecmp(cfg_obj_asstring(obj), "forward") == 0) {
obj = NULL;
(void)cfg_map_get(zoptions, "forward", &obj);
if (obj == NULL) {
continue;
}
if (strcasecmp(cfg_obj_asstring(obj), "only") != 0) {
continue;
}
}
if (db == NULL) {
CHECK(dns_db_create(view->mctx, "rbt", name,
dns_dbtype_zone, view->rdclass, 0,
NULL, &db));
CHECK(dns_db_newversion(db, &version));
if (strcmp(empty_dbtype[2], "@") == 0) {
dns_name_clone(name, ns);
} else {
CHECK(dns_name_fromstring(ns, empty_dbtype[2],
0, NULL));
}
CHECK(dns_name_fromstring(contact, empty_dbtype[3], 0,
NULL));
CHECK(add_soa(db, version, name, ns, contact));
CHECK(add_ns(db, version, name, ns));
}
CHECK(add_ns(db, version, zname, dns_rootname));
}
/*
* Is the existing zone the ok to use?
*/
if (zone != NULL) {
unsigned int typec;
const char **dbargv;
if (db != NULL) {
typec = rbt_dbtypec;
dbargv = rbt_dbtype;
} else {
typec = empty_dbtypec;
dbargv = empty_dbtype;
}
result = check_dbtype(zone, typec, dbargv, view->mctx);
if (result != ISC_R_SUCCESS) {
zone = NULL;
}
if (zone != NULL && dns_zone_gettype(zone) != dns_zone_master) {
zone = NULL;
}
if (zone != NULL && dns_zone_getfile(zone) != NULL) {
zone = NULL;
}
if (zone != NULL) {
dns_zone_getraw(zone, &myzone);
if (myzone != NULL) {
dns_zone_detach(&myzone);
zone = NULL;
}
}
}
if (zone == NULL) {
CHECK(dns_zonemgr_createzone(named_g_server->zonemgr, &myzone));
zone = myzone;
CHECK(dns_zone_setorigin(zone, name));
CHECK(dns_zonemgr_managezone(named_g_server->zonemgr, zone));
if (db == NULL) {
dns_zone_setdbtype(zone, empty_dbtypec, empty_dbtype);
}
dns_zone_setclass(zone, view->rdclass);
dns_zone_settype(zone, dns_zone_master);
dns_zone_setstats(zone, named_g_server->zonestats);
}
dns_zone_setoption(zone, ~DNS_ZONEOPT_NOCHECKNS, false);
dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, true);
dns_zone_setnotifytype(zone, dns_notifytype_no);
dns_zone_setdialup(zone, dns_dialuptype_no);
dns_zone_setautomatic(zone, true);
if (view->queryacl != NULL) {
dns_zone_setqueryacl(zone, view->queryacl);
} else {
dns_zone_clearqueryacl(zone);
}
if (view->queryonacl != NULL) {
dns_zone_setqueryonacl(zone, view->queryonacl);
} else {
dns_zone_clearqueryonacl(zone);
}
dns_zone_clearupdateacl(zone);
if (view->transferacl != NULL) {
dns_zone_setxfracl(zone, view->transferacl);
} else {
dns_zone_clearxfracl(zone);
}
CHECK(setquerystats(zone, view->mctx, statlevel));
if (db != NULL) {
dns_db_closeversion(db, &version, true);
CHECK(dns_zone_replacedb(zone, db, false));
}
dns_zone_setoption(zone, DNS_ZONEOPT_AUTOEMPTY, true);
dns_zone_setview(zone, view);
CHECK(dns_view_addzone(view, zone));
if (!strcmp(viewname, "_default")) {
sep = "";
viewname = "";
}
dns_name_format(name, namebuf, sizeof(namebuf));
isc_log_write(named_g_lctx, DNS_LOGCATEGORY_ZONELOAD,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"automatic empty zone%s%s: %s", sep, viewname, namebuf);
cleanup:
if (myzone != NULL) {
dns_zone_detach(&myzone);
}
if (version != NULL) {
dns_db_closeversion(db, &version, false);
}
if (db != NULL) {
dns_db_detach(&db);
}
INSIST(version == NULL);
return (result);
}
#ifdef HAVE_DNSTAP
static isc_result_t
configure_dnstap(const cfg_obj_t **maps, dns_view_t *view) {
isc_result_t result;
const cfg_obj_t *obj, *obj2;
const cfg_listelt_t *element;
const char *dpath;
const cfg_obj_t *dlist = NULL;
dns_dtmsgtype_t dttypes = 0;
unsigned int i;
struct fstrm_iothr_options *fopt = NULL;
result = named_config_get(maps, "dnstap", &dlist);
if (result != ISC_R_SUCCESS) {
return (ISC_R_SUCCESS);
}
for (element = cfg_list_first(dlist); element != NULL;
element = cfg_list_next(element))
{
const char *str;
dns_dtmsgtype_t dt = 0;
obj = cfg_listelt_value(element);
obj2 = cfg_tuple_get(obj, "type");
str = cfg_obj_asstring(obj2);
if (strcasecmp(str, "client") == 0) {
dt |= DNS_DTTYPE_CQ | DNS_DTTYPE_CR;
} else if (strcasecmp(str, "auth") == 0) {
dt |= DNS_DTTYPE_AQ | DNS_DTTYPE_AR;
} else if (strcasecmp(str, "resolver") == 0) {
dt |= DNS_DTTYPE_RQ | DNS_DTTYPE_RR;
} else if (strcasecmp(str, "forwarder") == 0) {
dt |= DNS_DTTYPE_FQ | DNS_DTTYPE_FR;
} else if (strcasecmp(str, "update") == 0) {
dt |= DNS_DTTYPE_UQ | DNS_DTTYPE_UR;
} else if (strcasecmp(str, "all") == 0) {
dt |= DNS_DTTYPE_CQ | DNS_DTTYPE_CR | DNS_DTTYPE_AQ |
DNS_DTTYPE_AR | DNS_DTTYPE_RQ | DNS_DTTYPE_RR |
DNS_DTTYPE_FQ | DNS_DTTYPE_FR | DNS_DTTYPE_UQ |
DNS_DTTYPE_UR;
}
obj2 = cfg_tuple_get(obj, "mode");
if (obj2 == NULL || cfg_obj_isvoid(obj2)) {
dttypes |= dt;
continue;
}
str = cfg_obj_asstring(obj2);
if (strcasecmp(str, "query") == 0) {
dt &= ~DNS_DTTYPE_RESPONSE;
} else if (strcasecmp(str, "response") == 0) {
dt &= ~DNS_DTTYPE_QUERY;
}
dttypes |= dt;
}
if (named_g_server->dtenv == NULL && dttypes != 0) {
dns_dtmode_t dmode;
uint64_t max_size = 0;
uint32_t rolls = 0;
isc_log_rollsuffix_t suffix = isc_log_rollsuffix_increment;
obj = NULL;
CHECKM(named_config_get(maps, "dnstap-output", &obj),
"'dnstap-output' must be set if 'dnstap' is set");
obj2 = cfg_tuple_get(obj, "mode");
if (obj2 == NULL) {
CHECKM(ISC_R_FAILURE, "dnstap-output mode not found");
}
if (strcasecmp(cfg_obj_asstring(obj2), "file") == 0) {
dmode = dns_dtmode_file;
} else {
dmode = dns_dtmode_unix;
}
obj2 = cfg_tuple_get(obj, "path");
if (obj2 == NULL) {
CHECKM(ISC_R_FAILURE, "dnstap-output path not found");
}
dpath = cfg_obj_asstring(obj2);
obj2 = cfg_tuple_get(obj, "size");
if (obj2 != NULL && cfg_obj_isuint64(obj2)) {
max_size = cfg_obj_asuint64(obj2);
if (max_size > SIZE_MAX) {
cfg_obj_log(obj2, named_g_lctx, ISC_LOG_WARNING,
"'dnstap-output size "
"%" PRIu64 "' "
"is too large for this "
"system; reducing to %lu",
max_size, (unsigned long)SIZE_MAX);
max_size = SIZE_MAX;
}
}
obj2 = cfg_tuple_get(obj, "versions");
if (obj2 != NULL && cfg_obj_isuint32(obj2)) {
rolls = cfg_obj_asuint32(obj2);
} else {
rolls = ISC_LOG_ROLLINFINITE;
}
obj2 = cfg_tuple_get(obj, "suffix");
if (obj2 != NULL && cfg_obj_isstring(obj2) &&
strcasecmp(cfg_obj_asstring(obj2), "timestamp") == 0)
{
suffix = isc_log_rollsuffix_timestamp;
}
fopt = fstrm_iothr_options_init();
fstrm_iothr_options_set_num_input_queues(fopt, named_g_cpus);
fstrm_iothr_options_set_queue_model(
fopt, FSTRM_IOTHR_QUEUE_MODEL_MPSC);
obj = NULL;
result = named_config_get(maps, "fstrm-set-buffer-hint", &obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
fstrm_iothr_options_set_buffer_hint(fopt, i);
}
obj = NULL;
result = named_config_get(maps, "fstrm-set-flush-timeout",
&obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
fstrm_iothr_options_set_flush_timeout(fopt, i);
}
obj = NULL;
result = named_config_get(maps, "fstrm-set-input-queue-size",
&obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
fstrm_iothr_options_set_input_queue_size(fopt, i);
}
obj = NULL;
result = named_config_get(
maps, "fstrm-set-output-notify-threshold", &obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
fstrm_iothr_options_set_queue_notify_threshold(fopt, i);
}
obj = NULL;
result = named_config_get(maps, "fstrm-set-output-queue-model",
&obj);
if (result == ISC_R_SUCCESS) {
if (strcasecmp(cfg_obj_asstring(obj), "spsc") == 0) {
i = FSTRM_IOTHR_QUEUE_MODEL_SPSC;
} else {
i = FSTRM_IOTHR_QUEUE_MODEL_MPSC;
}
fstrm_iothr_options_set_queue_model(fopt, i);
}
obj = NULL;
result = named_config_get(maps, "fstrm-set-output-queue-size",
&obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asuint32(obj);
fstrm_iothr_options_set_output_queue_size(fopt, i);
}
obj = NULL;
result = named_config_get(maps, "fstrm-set-reopen-interval",
&obj);
if (result == ISC_R_SUCCESS) {
i = cfg_obj_asduration(obj);
fstrm_iothr_options_set_reopen_interval(fopt, i);
}
CHECKM(dns_dt_create(named_g_mctx, dmode, dpath, &fopt,
named_g_server->task,
&named_g_server->dtenv),
"unable to create dnstap environment");
CHECKM(dns_dt_setupfile(named_g_server->dtenv, max_size, rolls,
suffix),
"unable to set up dnstap logfile");
}
if (named_g_server->dtenv == NULL) {
return (ISC_R_SUCCESS);
}
obj = NULL;
result = named_config_get(maps, "dnstap-version", &obj);
if (result != ISC_R_SUCCESS) {
/* not specified; use the product and version */
dns_dt_setversion(named_g_server->dtenv, PRODUCT " " VERSION);
} else if (result == ISC_R_SUCCESS && !cfg_obj_isvoid(obj)) {
/* Quoted string */
dns_dt_setversion(named_g_server->dtenv, cfg_obj_asstring(obj));
}
obj = NULL;
result = named_config_get(maps, "dnstap-identity", &obj);
if (result == ISC_R_SUCCESS && cfg_obj_isboolean(obj)) {
/* "hostname" is interpreted as boolean true */
char buf[256];
result = named_os_gethostname(buf, sizeof(buf));
if (result == ISC_R_SUCCESS) {
dns_dt_setidentity(named_g_server->dtenv, buf);
}
} else if (result == ISC_R_SUCCESS && !cfg_obj_isvoid(obj)) {
/* Quoted string */
dns_dt_setidentity(named_g_server->dtenv,
cfg_obj_asstring(obj));
}
dns_dt_attach(named_g_server->dtenv, &view->dtenv);
view->dttypes = dttypes;
result = ISC_R_SUCCESS;
cleanup:
if (fopt != NULL) {
fstrm_iothr_options_destroy(&fopt);
}
return (result);
}
#endif /* HAVE_DNSTAP */
static isc_result_t
create_mapped_acl(void) {
isc_result_t result;
dns_acl_t *acl = NULL;
struct in6_addr in6 = IN6ADDR_V4MAPPED_INIT;
isc_netaddr_t addr;
isc_netaddr_fromin6(&addr, &in6);
result = dns_acl_create(named_g_mctx, 1, &acl);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = dns_iptable_addprefix(acl->iptable, &addr, 96, true);
if (result == ISC_R_SUCCESS) {
dns_acl_attach(acl, &named_g_mapped);
}
dns_acl_detach(&acl);
return (result);
}
#ifdef HAVE_DLOPEN
/*%
* A callback for the cfg_pluginlist_foreach() call in configure_view() below.
* If registering any plugin fails, registering subsequent ones is not
* attempted.
*/
static isc_result_t
register_one_plugin(const cfg_obj_t *config, const cfg_obj_t *obj,
const char *plugin_path, const char *parameters,
void *callback_data) {
dns_view_t *view = callback_data;
char full_path[PATH_MAX];
isc_result_t result;
result = ns_plugin_expandpath(plugin_path, full_path,
sizeof(full_path));
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"%s: plugin configuration failed: "
"unable to get full plugin path: %s",
plugin_path, isc_result_totext(result));
return (result);
}
result = ns_plugin_register(full_path, parameters, config,
cfg_obj_file(obj), cfg_obj_line(obj),
named_g_mctx, named_g_lctx,
named_g_aclconfctx, view);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"%s: plugin configuration failed: %s", full_path,
isc_result_totext(result));
}
return (result);
}
#endif /* ifdef HAVE_DLOPEN */
/*
* Configure 'view' according to 'vconfig', taking defaults from 'config'
* where values are missing in 'vconfig'.
*
* When configuring the default view, 'vconfig' will be NULL and the
* global defaults in 'config' used exclusively.
*/
static isc_result_t
configure_view(dns_view_t *view, dns_viewlist_t *viewlist, cfg_obj_t *config,
cfg_obj_t *vconfig, named_cachelist_t *cachelist,
dns_kasplist_t *kasplist, const cfg_obj_t *bindkeys,
isc_mem_t *mctx, cfg_aclconfctx_t *actx, bool need_hints) {
const cfg_obj_t *maps[4];
const cfg_obj_t *cfgmaps[3];
const cfg_obj_t *optionmaps[3];
const cfg_obj_t *options = NULL;
const cfg_obj_t *voptions = NULL;
const cfg_obj_t *forwardtype;
const cfg_obj_t *forwarders;
const cfg_obj_t *alternates;
const cfg_obj_t *zonelist;
const cfg_obj_t *dlzlist;
const cfg_obj_t *dlz;
unsigned int dlzargc;
char **dlzargv;
const cfg_obj_t *dyndb_list, *plugin_list;
const cfg_obj_t *disabled;
const cfg_obj_t *obj, *obj2;
const cfg_listelt_t *element;
in_port_t port;
dns_cache_t *cache = NULL;
isc_result_t result;
size_t max_cache_size;
uint32_t max_cache_size_percent = 0;
size_t max_adb_size;
uint32_t lame_ttl, fail_ttl;
uint32_t max_stale_ttl;
dns_tsig_keyring_t *ring = NULL;
dns_view_t *pview = NULL; /* Production view */
isc_mem_t *cmctx = NULL, *hmctx = NULL;
dns_dispatch_t *dispatch4 = NULL;
dns_dispatch_t *dispatch6 = NULL;
bool reused_cache = false;
bool shared_cache = false;
int i = 0, j = 0, k = 0;
const char *str;
const char *cachename = NULL;
dns_order_t *order = NULL;
uint32_t udpsize;
uint32_t maxbits;
unsigned int resopts = 0;
dns_zone_t *zone = NULL;
uint32_t max_clients_per_query;
bool empty_zones_enable;
const cfg_obj_t *disablelist = NULL;
isc_stats_t *resstats = NULL;
dns_stats_t *resquerystats = NULL;
bool auto_root = false;
named_cache_t *nsc;
bool zero_no_soattl;
dns_acl_t *clients = NULL, *mapped = NULL, *excluded = NULL;
unsigned int query_timeout, ndisp;
bool old_rpz_ok = false;
isc_dscp_t dscp4 = -1, dscp6 = -1;
dns_dyndbctx_t *dctx = NULL;
unsigned int resolver_param;
dns_ntatable_t *ntatable = NULL;
const char *qminmode = NULL;
REQUIRE(DNS_VIEW_VALID(view));
if (config != NULL) {
(void)cfg_map_get(config, "options", &options);
}
/*
* maps: view options, options, defaults
* cfgmaps: view options, config
* optionmaps: view options, options
*/
if (vconfig != NULL) {
voptions = cfg_tuple_get(vconfig, "options");
maps[i++] = voptions;
optionmaps[j++] = voptions;
cfgmaps[k++] = voptions;
}
if (options != NULL) {
maps[i++] = options;
optionmaps[j++] = options;
}
maps[i++] = named_g_defaults;
maps[i] = NULL;
optionmaps[j] = NULL;
if (config != NULL) {
cfgmaps[k++] = config;
}
cfgmaps[k] = NULL;
/*
* Set the view's port number for outgoing queries.
*/
CHECKM(named_config_getport(config, &port), "port");
dns_view_setdstport(view, port);
/*
* Make the list of response policy zone names for a view that
* is used for real lookups and so cares about hints.
*/
obj = NULL;
if (view->rdclass == dns_rdataclass_in && need_hints &&
named_config_get(maps, "response-policy", &obj) == ISC_R_SUCCESS)
{
CHECK(configure_rpz(view, maps, obj, &old_rpz_ok));
}
obj = NULL;
if (view->rdclass == dns_rdataclass_in && need_hints &&
named_config_get(maps, "catalog-zones", &obj) == ISC_R_SUCCESS)
{
CHECK(configure_catz(view, config, obj));
}
/*
* Configure the zones.
*/
zonelist = NULL;
if (voptions != NULL) {
(void)cfg_map_get(voptions, "zone", &zonelist);
} else {
(void)cfg_map_get(config, "zone", &zonelist);
}
/*
* Load zone configuration
*/
for (element = cfg_list_first(zonelist); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *zconfig = cfg_listelt_value(element);
CHECK(configure_zone(config, zconfig, vconfig, mctx, view,
viewlist, kasplist, actx, false,
old_rpz_ok, false));
}
/*
* Check that a master or slave zone was found for each
* zone named in the response policy statement
* unless we are using RPZ service interface.
*/
if (view->rpzs != NULL && !view->rpzs->p.dnsrps_enabled) {
dns_rpz_num_t n;
for (n = 0; n < view->rpzs->p.num_zones; ++n) {
if ((view->rpzs->defined & DNS_RPZ_ZBIT(n)) == 0) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(&view->rpzs->zones[n]->origin,
namebuf, sizeof(namebuf));
isc_log_write(named_g_lctx,
NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER,
DNS_RPZ_ERROR_LEVEL,
"rpz '%s'"
" is not a master or slave zone",
namebuf);
result = ISC_R_NOTFOUND;
goto cleanup;
}
}
}
/*
* If we're allowing added zones, then load zone configuration
* from the newzone file for zones that were added during previous
* runs.
*/
CHECK(configure_newzones(view, config, vconfig, mctx, actx));
/*
* Create Dynamically Loadable Zone driver.
*/
dlzlist = NULL;
if (voptions != NULL) {
(void)cfg_map_get(voptions, "dlz", &dlzlist);
} else {
(void)cfg_map_get(config, "dlz", &dlzlist);
}
for (element = cfg_list_first(dlzlist); element != NULL;
element = cfg_list_next(element))
{
dlz = cfg_listelt_value(element);
obj = NULL;
(void)cfg_map_get(dlz, "database", &obj);
if (obj != NULL) {
dns_dlzdb_t *dlzdb = NULL;
const cfg_obj_t *name, *search = NULL;
char *s = isc_mem_strdup(mctx, cfg_obj_asstring(obj));
if (s == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
result = isc_commandline_strtoargv(mctx, s, &dlzargc,
&dlzargv, 0);
if (result != ISC_R_SUCCESS) {
isc_mem_free(mctx, s);
goto cleanup;
}
name = cfg_map_getname(dlz);
result = dns_dlzcreate(mctx, cfg_obj_asstring(name),
dlzargv[0], dlzargc, dlzargv,
&dlzdb);
isc_mem_free(mctx, s);
isc_mem_put(mctx, dlzargv, dlzargc * sizeof(*dlzargv));
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
/*
* If the DLZ backend supports configuration,
* and is searchable, then call its configure
* method now. If not searchable, we'll take
* care of it when we process the zone statement.
*/
(void)cfg_map_get(dlz, "search", &search);
if (search == NULL || cfg_obj_asboolean(search)) {
dlzdb->search = true;
result = dns_dlzconfigure(
view, dlzdb, dlzconfigure_callback);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
ISC_LIST_APPEND(view->dlz_searched, dlzdb,
link);
} else {
dlzdb->search = false;
ISC_LIST_APPEND(view->dlz_unsearched, dlzdb,
link);
}
}
}
/*
* Obtain configuration parameters that affect the decision of whether
* we can reuse/share an existing cache.
*/
obj = NULL;
result = named_config_get(maps, "max-cache-size", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isstring(obj)) {
str = cfg_obj_asstring(obj);
INSIST(strcasecmp(str, "unlimited") == 0);
max_cache_size = 0;
} else if (cfg_obj_ispercentage(obj)) {
max_cache_size = SIZE_AS_PERCENT;
max_cache_size_percent = cfg_obj_aspercentage(obj);
} else {
isc_resourcevalue_t value;
value = cfg_obj_asuint64(obj);
if (value > SIZE_MAX) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"'max-cache-size "
"%" PRIu64 "' "
"is too large for this "
"system; reducing to %lu",
value, (unsigned long)SIZE_MAX);
value = SIZE_MAX;
}
max_cache_size = (size_t)value;
}
if (max_cache_size == SIZE_AS_PERCENT) {
uint64_t totalphys = isc_meminfo_totalphys();
max_cache_size =
(size_t)(totalphys * max_cache_size_percent / 100);
if (totalphys == 0) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"Unable to determine amount of physical "
"memory, setting 'max-cache-size' to "
"unlimited");
} else {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_INFO,
"'max-cache-size %d%%' "
"- setting to %" PRIu64 "MB "
"(out of %" PRIu64 "MB)",
max_cache_size_percent,
(uint64_t)(max_cache_size / (1024 * 1024)),
totalphys / (1024 * 1024));
}
}
/* Check-names. */
obj = NULL;
result = named_checknames_get(maps, "response", &obj);
INSIST(result == ISC_R_SUCCESS);
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "fail") == 0) {
resopts |= DNS_RESOLVER_CHECKNAMES |
DNS_RESOLVER_CHECKNAMESFAIL;
view->checknames = true;
} else if (strcasecmp(str, "warn") == 0) {
resopts |= DNS_RESOLVER_CHECKNAMES;
view->checknames = false;
} else if (strcasecmp(str, "ignore") == 0) {
view->checknames = false;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
obj = NULL;
result = named_config_get(maps, "zero-no-soa-ttl-cache", &obj);
INSIST(result == ISC_R_SUCCESS);
zero_no_soattl = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "dns64", &obj);
if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") &&
strcmp(view->name, "_meta"))
{
isc_netaddr_t na, suffix, *sp;
unsigned int prefixlen;
const char *server, *contact;
const cfg_obj_t *myobj;
myobj = NULL;
result = named_config_get(maps, "dns64-server", &myobj);
if (result == ISC_R_SUCCESS) {
server = cfg_obj_asstring(myobj);
} else {
server = NULL;
}
myobj = NULL;
result = named_config_get(maps, "dns64-contact", &myobj);
if (result == ISC_R_SUCCESS) {
contact = cfg_obj_asstring(myobj);
} else {
contact = NULL;
}
for (element = cfg_list_first(obj); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *map = cfg_listelt_value(element);
dns_dns64_t *dns64 = NULL;
unsigned int dns64options = 0;
cfg_obj_asnetprefix(cfg_map_getname(map), &na,
&prefixlen);
obj = NULL;
(void)cfg_map_get(map, "suffix", &obj);
if (obj != NULL) {
sp = &suffix;
isc_netaddr_fromsockaddr(
sp, cfg_obj_assockaddr(obj));
} else {
sp = NULL;
}
clients = mapped = excluded = NULL;
obj = NULL;
(void)cfg_map_get(map, "clients", &obj);
if (obj != NULL) {
result = cfg_acl_fromconfig(obj, config,
named_g_lctx, actx,
mctx, 0, &clients);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
obj = NULL;
(void)cfg_map_get(map, "mapped", &obj);
if (obj != NULL) {
result = cfg_acl_fromconfig(obj, config,
named_g_lctx, actx,
mctx, 0, &mapped);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
obj = NULL;
(void)cfg_map_get(map, "exclude", &obj);
if (obj != NULL) {
result = cfg_acl_fromconfig(obj, config,
named_g_lctx, actx,
mctx, 0, &excluded);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
} else {
if (named_g_mapped == NULL) {
result = create_mapped_acl();
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
dns_acl_attach(named_g_mapped, &excluded);
}
obj = NULL;
(void)cfg_map_get(map, "recursive-only", &obj);
if (obj != NULL && cfg_obj_asboolean(obj)) {
dns64options |= DNS_DNS64_RECURSIVE_ONLY;
}
obj = NULL;
(void)cfg_map_get(map, "break-dnssec", &obj);
if (obj != NULL && cfg_obj_asboolean(obj)) {
dns64options |= DNS_DNS64_BREAK_DNSSEC;
}
result = dns_dns64_create(mctx, &na, prefixlen, sp,
clients, mapped, excluded,
dns64options, &dns64);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
dns_dns64_append(&view->dns64, dns64);
view->dns64cnt++;
result = dns64_reverse(view, mctx, &na, prefixlen,
server, contact);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
if (clients != NULL) {
dns_acl_detach(&clients);
}
if (mapped != NULL) {
dns_acl_detach(&mapped);
}
if (excluded != NULL) {
dns_acl_detach(&excluded);
}
}
}
obj = NULL;
result = named_config_get(maps, "dnssec-accept-expired", &obj);
INSIST(result == ISC_R_SUCCESS);
view->acceptexpired = cfg_obj_asboolean(obj);
obj = NULL;
/* 'optionmaps', not 'maps': don't check named_g_defaults yet */
(void)named_config_get(optionmaps, "dnssec-validation", &obj);
if (obj == NULL) {
/*
* Default to VALIDATION_DEFAULT as set in config.c.
*/
(void)cfg_map_get(named_g_defaults, "dnssec-validation", &obj);
INSIST(obj != NULL);
}
if (obj != NULL) {
if (cfg_obj_isboolean(obj)) {
view->enablevalidation = cfg_obj_asboolean(obj);
} else {
/*
* If dnssec-validation is set but not boolean,
* then it must be "auto"
*/
view->enablevalidation = true;
auto_root = true;
}
}
obj = NULL;
result = named_config_get(maps, "max-cache-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
view->maxcachettl = cfg_obj_asduration(obj);
obj = NULL;
result = named_config_get(maps, "max-ncache-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
view->maxncachettl = cfg_obj_asduration(obj);
obj = NULL;
result = named_config_get(maps, "min-cache-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
view->mincachettl = cfg_obj_asduration(obj);
obj = NULL;
result = named_config_get(maps, "min-ncache-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
view->minncachettl = cfg_obj_asduration(obj);
obj = NULL;
result = named_config_get(maps, "synth-from-dnssec", &obj);
INSIST(result == ISC_R_SUCCESS);
view->synthfromdnssec = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "max-stale-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
max_stale_ttl = ISC_MAX(cfg_obj_asduration(obj), 1);
obj = NULL;
result = named_config_get(maps, "stale-answer-enable", &obj);
INSIST(result == ISC_R_SUCCESS);
view->staleanswersenable = cfg_obj_asboolean(obj);
result = dns_viewlist_find(&named_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result == ISC_R_SUCCESS) {
view->staleanswersok = pview->staleanswersok;
dns_view_detach(&pview);
} else {
view->staleanswersok = dns_stale_answer_conf;
}
/*
* Configure the view's cache.
*
* First, check to see if there are any attach-cache options. If yes,
* attempt to lookup an existing cache at attach it to the view. If
* there is not one, then try to reuse an existing cache if possible;
* otherwise create a new cache.
*
* Note that the ADB is not preserved or shared in either case.
*
* When a matching view is found, the associated statistics are also
* retrieved and reused.
*
* XXX Determining when it is safe to reuse or share a cache is tricky.
* When the view's configuration changes, the cached data may become
* invalid because it reflects our old view of the world. We check
* some of the configuration parameters that could invalidate the cache
* or otherwise make it unshareable, but there are other configuration
* options that should be checked. For example, if a view uses a
* forwarder, changes in the forwarder configuration may invalidate
* the cache. At the moment, it's the administrator's responsibility to
* ensure these configuration options don't invalidate reusing/sharing.
*/
obj = NULL;
result = named_config_get(maps, "attach-cache", &obj);
if (result == ISC_R_SUCCESS) {
cachename = cfg_obj_asstring(obj);
} else {
cachename = view->name;
}
cache = NULL;
nsc = cachelist_find(cachelist, cachename, view->rdclass);
if (nsc != NULL) {
if (!cache_sharable(nsc->primaryview, view, zero_no_soattl,
max_cache_size, max_stale_ttl))
{
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"views %s and %s can't share the cache "
"due to configuration parameter mismatch",
nsc->primaryview->name, view->name);
result = ISC_R_FAILURE;
goto cleanup;
}
dns_cache_attach(nsc->cache, &cache);
shared_cache = true;
} else {
if (strcmp(cachename, view->name) == 0) {
result = dns_viewlist_find(&named_g_server->viewlist,
cachename, view->rdclass,
&pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
{
goto cleanup;
}
if (pview != NULL) {
if (!cache_reusable(pview, view,
zero_no_soattl)) {
isc_log_write(named_g_lctx,
NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER,
ISC_LOG_DEBUG(1),
"cache cannot be reused "
"for view %s due to "
"configuration parameter "
"mismatch",
view->name);
} else {
INSIST(pview->cache != NULL);
isc_log_write(named_g_lctx,
NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER,
ISC_LOG_DEBUG(3),
"reusing existing cache");
reused_cache = true;
dns_cache_attach(pview->cache, &cache);
}
dns_view_getresstats(pview, &resstats);
dns_view_getresquerystats(pview,
&resquerystats);
dns_view_detach(&pview);
}
}
if (cache == NULL) {
/*
* Create a cache with the desired name. This normally
* equals the view name, but may also be a forward
* reference to a view that share the cache with this
* view but is not yet configured. If it is not the
* view name but not a forward reference either, then it
* is simply a named cache that is not shared.
*
* We use two separate memory contexts for the
* cache, for the main cache memory and the heap
* memory.
*/
isc_mem_create(&cmctx);
isc_mem_setname(cmctx, "cache", NULL);
isc_mem_create(&hmctx);
isc_mem_setname(hmctx, "cache_heap", NULL);
CHECK(dns_cache_create(cmctx, hmctx, named_g_taskmgr,
named_g_timermgr, view->rdclass,
cachename, "rbt", 0, NULL,
&cache));
isc_mem_detach(&cmctx);
isc_mem_detach(&hmctx);
}
nsc = isc_mem_get(mctx, sizeof(*nsc));
nsc->cache = NULL;
dns_cache_attach(cache, &nsc->cache);
nsc->primaryview = view;
nsc->needflush = false;
nsc->adbsizeadjusted = false;
nsc->rdclass = view->rdclass;
ISC_LINK_INIT(nsc, link);
ISC_LIST_APPEND(*cachelist, nsc, link);
}
dns_view_setcache(view, cache, shared_cache);
/*
* cache-file cannot be inherited if views are present, but this
* should be caught by the configuration checking stage.
*/
obj = NULL;
result = named_config_get(maps, "cache-file", &obj);
if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") != 0) {
CHECK(dns_cache_setfilename(cache, cfg_obj_asstring(obj)));
if (!reused_cache && !shared_cache) {
CHECK(dns_cache_load(cache));
}
}
dns_cache_setcachesize(cache, max_cache_size);
dns_cache_setservestalettl(cache, max_stale_ttl);
dns_cache_detach(&cache);
obj = NULL;
result = named_config_get(maps, "stale-answer-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
view->staleanswerttl = ISC_MAX(cfg_obj_asduration(obj), 1);
/*
* Resolver.
*
* XXXRTH Hardwired number of tasks.
*/
CHECK(get_view_querysource_dispatch(
maps, AF_INET, &dispatch4, &dscp4,
(ISC_LIST_PREV(view, link) == NULL)));
CHECK(get_view_querysource_dispatch(
maps, AF_INET6, &dispatch6, &dscp6,
(ISC_LIST_PREV(view, link) == NULL)));
if (dispatch4 == NULL && dispatch6 == NULL) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"unable to obtain neither an IPv4 nor"
" an IPv6 dispatch");
result = ISC_R_UNEXPECTED;
goto cleanup;
}
if (resstats == NULL) {
CHECK(isc_stats_create(mctx, &resstats,
dns_resstatscounter_max));
}
dns_view_setresstats(view, resstats);
if (resquerystats == NULL) {
CHECK(dns_rdatatypestats_create(mctx, &resquerystats));
}
dns_view_setresquerystats(view, resquerystats);
ndisp = 4 * ISC_MIN(named_g_udpdisp, MAX_UDP_DISPATCH);
CHECK(dns_view_createresolver(
view, named_g_taskmgr, RESOLVER_NTASKS, ndisp,
named_g_socketmgr, named_g_timermgr, resopts,
named_g_dispatchmgr, dispatch4, dispatch6));
if (dscp4 == -1) {
dscp4 = named_g_dscp;
}
if (dscp6 == -1) {
dscp6 = named_g_dscp;
}
if (dscp4 != -1) {
dns_resolver_setquerydscp4(view->resolver, dscp4);
}
if (dscp6 != -1) {
dns_resolver_setquerydscp6(view->resolver, dscp6);
}
/*
* Set the ADB cache size to 1/8th of the max-cache-size or
* MAX_ADB_SIZE_FOR_CACHESHARE when the cache is shared.
*/
max_adb_size = 0;
if (max_cache_size != 0U) {
max_adb_size = max_cache_size / 8;
if (max_adb_size == 0U) {
max_adb_size = 1; /* Force minimum. */
}
if (view != nsc->primaryview &&
max_adb_size > MAX_ADB_SIZE_FOR_CACHESHARE) {
max_adb_size = MAX_ADB_SIZE_FOR_CACHESHARE;
if (!nsc->adbsizeadjusted) {
dns_adb_setadbsize(nsc->primaryview->adb,
MAX_ADB_SIZE_FOR_CACHESHARE);
nsc->adbsizeadjusted = true;
}
}
}
dns_adb_setadbsize(view->adb, max_adb_size);
/*
* Set up ADB quotas
*/
{
uint32_t fps, freq;
double low, high, discount;
obj = NULL;
result = named_config_get(maps, "fetches-per-server", &obj);
INSIST(result == ISC_R_SUCCESS);
obj2 = cfg_tuple_get(obj, "fetches");
fps = cfg_obj_asuint32(obj2);
obj2 = cfg_tuple_get(obj, "response");
if (!cfg_obj_isvoid(obj2)) {
const char *resp = cfg_obj_asstring(obj2);
isc_result_t r = DNS_R_SERVFAIL;
if (strcasecmp(resp, "drop") == 0) {
r = DNS_R_DROP;
} else if (strcasecmp(resp, "fail") == 0) {
r = DNS_R_SERVFAIL;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
dns_resolver_setquotaresponse(view->resolver,
dns_quotatype_server, r);
}
obj = NULL;
result = named_config_get(maps, "fetch-quota-params", &obj);
INSIST(result == ISC_R_SUCCESS);
obj2 = cfg_tuple_get(obj, "frequency");
freq = cfg_obj_asuint32(obj2);
obj2 = cfg_tuple_get(obj, "low");
low = (double)cfg_obj_asfixedpoint(obj2) / 100.0;
obj2 = cfg_tuple_get(obj, "high");
high = (double)cfg_obj_asfixedpoint(obj2) / 100.0;
obj2 = cfg_tuple_get(obj, "discount");
discount = (double)cfg_obj_asfixedpoint(obj2) / 100.0;
dns_adb_setquota(view->adb, fps, freq, low, high, discount);
}
/*
* Set resolver's lame-ttl.
*/
obj = NULL;
result = named_config_get(maps, "lame-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
lame_ttl = cfg_obj_asduration(obj);
if (lame_ttl > 1800) {
lame_ttl = 1800;
}
dns_resolver_setlamettl(view->resolver, lame_ttl);
/*
* Set the resolver's query timeout.
*/
obj = NULL;
result = named_config_get(maps, "resolver-query-timeout", &obj);
INSIST(result == ISC_R_SUCCESS);
query_timeout = cfg_obj_asuint32(obj);
dns_resolver_settimeout(view->resolver, query_timeout);
/* Specify whether to use 0-TTL for negative response for SOA query */
dns_resolver_setzeronosoattl(view->resolver, zero_no_soattl);
/*
* Set the resolver's EDNS UDP size.
*/
obj = NULL;
result = named_config_get(maps, "edns-udp-size", &obj);
INSIST(result == ISC_R_SUCCESS);
udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512) {
udpsize = 512;
}
if (udpsize > 4096) {
udpsize = 4096;
}
dns_resolver_setudpsize(view->resolver, (uint16_t)udpsize);
/*
* Set the maximum UDP response size.
*/
obj = NULL;
result = named_config_get(maps, "max-udp-size", &obj);
INSIST(result == ISC_R_SUCCESS);
udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512) {
udpsize = 512;
}
if (udpsize > 4096) {
udpsize = 4096;
}
view->maxudp = udpsize;
/*
* Set the maximum UDP when a COOKIE is not provided.
*/
obj = NULL;
result = named_config_get(maps, "nocookie-udp-size", &obj);
INSIST(result == ISC_R_SUCCESS);
udpsize = cfg_obj_asuint32(obj);
if (udpsize < 128) {
udpsize = 128;
}
if (udpsize > view->maxudp) {
udpsize = view->maxudp;
}
view->nocookieudp = udpsize;
/*
* Set the maximum rsa exponent bits.
*/
obj = NULL;
result = named_config_get(maps, "max-rsa-exponent-size", &obj);
INSIST(result == ISC_R_SUCCESS);
maxbits = cfg_obj_asuint32(obj);
if (maxbits != 0 && maxbits < 35) {
maxbits = 35;
}
if (maxbits > 4096) {
maxbits = 4096;
}
view->maxbits = maxbits;
/*
* Set resolver retry parameters.
*/
obj = NULL;
CHECK(named_config_get(maps, "resolver-retry-interval", &obj));
resolver_param = cfg_obj_asuint32(obj);
if (resolver_param > 0) {
dns_resolver_setretryinterval(view->resolver, resolver_param);
}
obj = NULL;
CHECK(named_config_get(maps, "resolver-nonbackoff-tries", &obj));
resolver_param = cfg_obj_asuint32(obj);
if (resolver_param > 0) {
dns_resolver_setnonbackofftries(view->resolver, resolver_param);
}
/*
* Set supported DNSSEC algorithms.
*/
dns_resolver_reset_algorithms(view->resolver);
disabled = NULL;
(void)named_config_get(maps, "disable-algorithms", &disabled);
if (disabled != NULL) {
for (element = cfg_list_first(disabled); element != NULL;
element = cfg_list_next(element))
{
CHECK(disable_algorithms(cfg_listelt_value(element),
view->resolver));
}
}
/*
* Set supported DS digest types.
*/
dns_resolver_reset_ds_digests(view->resolver);
disabled = NULL;
(void)named_config_get(maps, "disable-ds-digests", &disabled);
if (disabled != NULL) {
for (element = cfg_list_first(disabled); element != NULL;
element = cfg_list_next(element))
{
CHECK(disable_ds_digests(cfg_listelt_value(element),
view->resolver));
}
}
/*
* A global or view "forwarders" option, if present,
* creates an entry for "." in the forwarding table.
*/
forwardtype = NULL;
forwarders = NULL;
(void)named_config_get(maps, "forward", &forwardtype);
(void)named_config_get(maps, "forwarders", &forwarders);
if (forwarders != NULL) {
CHECK(configure_forward(config, view, dns_rootname, forwarders,
forwardtype));
}
/*
* Dual Stack Servers.
*/
alternates = NULL;
(void)named_config_get(maps, "dual-stack-servers", &alternates);
if (alternates != NULL) {
CHECK(configure_alternates(config, view, alternates));
}
/*
* We have default hints for class IN if we need them.
*/
if (view->rdclass == dns_rdataclass_in && view->hints == NULL) {
dns_view_sethints(view, named_g_server->in_roothints);
}
/*
* If we still have no hints, this is a non-IN view with no
* "hints zone" configured. Issue a warning, except if this
* is a root server. Root servers never need to consult
* their hints, so it's no point requiring users to configure
* them.
*/
if (view->hints == NULL) {
dns_zone_t *rootzone = NULL;
(void)dns_view_findzone(view, dns_rootname, &rootzone);
if (rootzone != NULL) {
dns_zone_detach(&rootzone);
need_hints = false;
}
if (need_hints) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"no root hints for view '%s'",
view->name);
}
}
/*
* Configure the view's TSIG keys.
*/
CHECK(named_tsigkeyring_fromconfig(config, vconfig, view->mctx, &ring));
if (named_g_server->sessionkey != NULL) {
CHECK(dns_tsigkeyring_add(ring, named_g_server->session_keyname,
named_g_server->sessionkey));
}
dns_view_setkeyring(view, ring);
dns_tsigkeyring_detach(&ring);
/*
* See if we can re-use a dynamic key ring.
*/
result = dns_viewlist_find(&named_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS) {
goto cleanup;
}
if (pview != NULL) {
dns_view_getdynamickeyring(pview, &ring);
if (ring != NULL) {
dns_view_setdynamickeyring(view, ring);
}
dns_tsigkeyring_detach(&ring);
dns_view_detach(&pview);
} else {
dns_view_restorekeyring(view);
}
/*
* Configure the view's peer list.
*/
{
const cfg_obj_t *peers = NULL;
dns_peerlist_t *newpeers = NULL;
(void)named_config_get(cfgmaps, "server", &peers);
CHECK(dns_peerlist_new(mctx, &newpeers));
for (element = cfg_list_first(peers); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *cpeer = cfg_listelt_value(element);
dns_peer_t *peer;
CHECK(configure_peer(cpeer, mctx, &peer));
dns_peerlist_addpeer(newpeers, peer);
dns_peer_detach(&peer);
}
dns_peerlist_detach(&view->peers);
view->peers = newpeers; /* Transfer ownership. */
}
/*
* Configure the views rrset-order.
*/
{
const cfg_obj_t *rrsetorder = NULL;
(void)named_config_get(maps, "rrset-order", &rrsetorder);
CHECK(dns_order_create(mctx, &order));
for (element = cfg_list_first(rrsetorder); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *ent = cfg_listelt_value(element);
CHECK(configure_order(order, ent));
}
if (view->order != NULL) {
dns_order_detach(&view->order);
}
dns_order_attach(order, &view->order);
dns_order_detach(&order);
}
/*
* Copy the aclenv object.
*/
dns_aclenv_copy(&view->aclenv, ns_interfacemgr_getaclenv(
named_g_server->interfacemgr));
/*
* Configure the "match-clients" and "match-destinations" ACL.
* (These are only meaningful at the view level, but 'config'
* must be passed so that named ACLs defined at the global level
* can be retrieved.)
*/
CHECK(configure_view_acl(vconfig, config, NULL, "match-clients", NULL,
actx, named_g_mctx, &view->matchclients));
CHECK(configure_view_acl(vconfig, config, NULL, "match-destinations",
NULL, actx, named_g_mctx,
&view->matchdestinations));
/*
* Configure the "match-recursive-only" option.
*/
obj = NULL;
(void)named_config_get(maps, "match-recursive-only", &obj);
if (obj != NULL && cfg_obj_asboolean(obj)) {
view->matchrecursiveonly = true;
} else {
view->matchrecursiveonly = false;
}
/*
* Configure other configurable data.
*/
obj = NULL;
result = named_config_get(maps, "recursion", &obj);
INSIST(result == ISC_R_SUCCESS);
view->recursion = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "qname-minimization", &obj);
INSIST(result == ISC_R_SUCCESS);
qminmode = cfg_obj_asstring(obj);
INSIST(qminmode != NULL);
if (!strcmp(qminmode, "strict")) {
view->qminimization = true;
view->qmin_strict = true;
} else if (!strcmp(qminmode, "relaxed")) {
view->qminimization = true;
view->qmin_strict = false;
} else { /* "disabled" or "off" */
view->qminimization = false;
view->qmin_strict = false;
}
obj = NULL;
result = named_config_get(maps, "auth-nxdomain", &obj);
INSIST(result == ISC_R_SUCCESS);
view->auth_nxdomain = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "glue-cache", &obj);
INSIST(result == ISC_R_SUCCESS);
view->use_glue_cache = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "minimal-any", &obj);
INSIST(result == ISC_R_SUCCESS);
view->minimal_any = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "minimal-responses", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isboolean(obj)) {
if (cfg_obj_asboolean(obj)) {
view->minimalresponses = dns_minimal_yes;
} else {
view->minimalresponses = dns_minimal_no;
}
} else {
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "no-auth") == 0) {
view->minimalresponses = dns_minimal_noauth;
} else if (strcasecmp(str, "no-auth-recursive") == 0) {
view->minimalresponses = dns_minimal_noauthrec;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
}
obj = NULL;
result = named_config_get(maps, "transfer-format", &obj);
INSIST(result == ISC_R_SUCCESS);
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "many-answers") == 0) {
view->transfer_format = dns_many_answers;
} else if (strcasecmp(str, "one-answer") == 0) {
view->transfer_format = dns_one_answer;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
obj = NULL;
result = named_config_get(maps, "trust-anchor-telemetry", &obj);
INSIST(result == ISC_R_SUCCESS);
view->trust_anchor_telemetry = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "root-key-sentinel", &obj);
INSIST(result == ISC_R_SUCCESS);
view->root_key_sentinel = cfg_obj_asboolean(obj);
/*
* Set the "allow-query", "allow-query-cache", "allow-recursion",
* "allow-recursion-on" and "allow-query-cache-on" ACLs if
* configured in named.conf, but NOT from the global defaults.
* This is done by leaving the third argument to configure_view_acl()
* NULL.
*
* We ignore the global defaults here because these ACLs
* can inherit from each other. If any are still unset after
* applying the inheritance rules, we'll look up the defaults at
* that time.
*/
/* named.conf only */
CHECK(configure_view_acl(vconfig, config, NULL, "allow-query", NULL,
actx, named_g_mctx, &view->queryacl));
/* named.conf only */
CHECK(configure_view_acl(vconfig, config, NULL, "allow-query-cache",
NULL, actx, named_g_mctx, &view->cacheacl));
/* named.conf only */
CHECK(configure_view_acl(vconfig, config, NULL, "allow-query-cache-on",
NULL, actx, named_g_mctx, &view->cacheonacl));
if (strcmp(view->name, "_bind") != 0 &&
view->rdclass != dns_rdataclass_chaos) {
/* named.conf only */
CHECK(configure_view_acl(vconfig, config, NULL,
"allow-recursion", NULL, actx,
named_g_mctx, &view->recursionacl));
/* named.conf only */
CHECK(configure_view_acl(vconfig, config, NULL,
"allow-recursion-on", NULL, actx,
named_g_mctx, &view->recursiononacl));
}
if (view->recursion) {
/*
* "allow-query-cache" inherits from "allow-recursion" if set,
* otherwise from "allow-query" if set.
*/
if (view->cacheacl == NULL) {
if (view->recursionacl != NULL) {
dns_acl_attach(view->recursionacl,
&view->cacheacl);
} else if (view->queryacl != NULL) {
dns_acl_attach(view->queryacl, &view->cacheacl);
}
}
/*
* "allow-recursion" inherits from "allow-query-cache" if set,
* otherwise from "allow-query" if set.
*/
if (view->recursionacl == NULL) {
if (view->cacheacl != NULL) {
dns_acl_attach(view->cacheacl,
&view->recursionacl);
} else if (view->queryacl != NULL) {
dns_acl_attach(view->queryacl,
&view->recursionacl);
}
}
/*
* "allow-query-cache-on" inherits from "allow-recursion-on"
* if set.
*/
if (view->cacheonacl == NULL) {
if (view->recursiononacl != NULL) {
dns_acl_attach(view->recursiononacl,
&view->cacheonacl);
}
}
/*
* "allow-recursion-on" inherits from "allow-query-cache-on"
* if set.
*/
if (view->recursiononacl == NULL) {
if (view->cacheonacl != NULL) {
dns_acl_attach(view->cacheonacl,
&view->recursiononacl);
}
}
/*
* If any are still unset at this point, we now get default
* values for from the global config.
*/
if (view->recursionacl == NULL) {
/* global default only */
CHECK(configure_view_acl(
NULL, NULL, named_g_config, "allow-recursion",
NULL, actx, named_g_mctx, &view->recursionacl));
}
if (view->recursiononacl == NULL) {
/* global default only */
CHECK(configure_view_acl(NULL, NULL, named_g_config,
"allow-recursion-on", NULL,
actx, named_g_mctx,
&view->recursiononacl));
}
if (view->cacheacl == NULL) {
/* global default only */
CHECK(configure_view_acl(
NULL, NULL, named_g_config, "allow-query-cache",
NULL, actx, named_g_mctx, &view->cacheacl));
}
if (view->cacheonacl == NULL) {
/* global default only */
CHECK(configure_view_acl(NULL, NULL, named_g_config,
"allow-query-cache-on", NULL,
actx, named_g_mctx,
&view->cacheonacl));
}
} else {
/*
* We're not recursive; if the query-cache ACLs haven't
* been set at the options/view level, set them to none.
*/
if (view->cacheacl == NULL) {
CHECK(dns_acl_none(mctx, &view->cacheacl));
}
if (view->cacheonacl == NULL) {
CHECK(dns_acl_none(mctx, &view->cacheonacl));
}
}
/*
* Finished setting recursion and query-cache ACLs, so now we
* can get the allow-query default if it wasn't set in named.conf
*/
if (view->queryacl == NULL) {
/* global default only */
CHECK(configure_view_acl(NULL, NULL, named_g_config,
"allow-query", NULL, actx,
named_g_mctx, &view->queryacl));
}
/*
* Ignore case when compressing responses to the specified
* clients. This causes case not always to be preserved,
* and is needed by some broken clients.
*/
CHECK(configure_view_acl(vconfig, config, named_g_config,
"no-case-compress", NULL, actx, named_g_mctx,
&view->nocasecompress));
/*
* Disable name compression completely, this is a tradeoff
* between CPU and network usage.
*/
obj = NULL;
result = named_config_get(maps, "message-compression", &obj);
INSIST(result == ISC_R_SUCCESS);
view->msgcompression = cfg_obj_asboolean(obj);
/*
* Filter setting on addresses in the answer section.
*/
CHECK(configure_view_acl(vconfig, config, named_g_config,
"deny-answer-addresses", "acl", actx,
named_g_mctx, &view->denyansweracl));
CHECK(configure_view_nametable(vconfig, config, "deny-answer-addresses",
"except-from", named_g_mctx,
&view->answeracl_exclude));
/*
* Filter setting on names (CNAME/DNAME targets) in the answer section.
*/
CHECK(configure_view_nametable(vconfig, config, "deny-answer-aliases",
"name", named_g_mctx,
&view->denyanswernames));
CHECK(configure_view_nametable(vconfig, config, "deny-answer-aliases",
"except-from", named_g_mctx,
&view->answernames_exclude));
/*
* Configure sortlist, if set
*/
CHECK(configure_view_sortlist(vconfig, config, actx, named_g_mctx,
&view->sortlist));
/*
* Configure default allow-update and allow-update-forwarding ACLs,
* so they can be inherited by zones. (XXX: These are not
* read from the options/view level here. However, they may be
* read from there in zoneconf.c:configure_zone_acl() later.)
*/
if (view->updateacl == NULL) {
CHECK(configure_view_acl(NULL, NULL, named_g_config,
"allow-update", NULL, actx,
named_g_mctx, &view->updateacl));
}
if (view->upfwdacl == NULL) {
CHECK(configure_view_acl(NULL, NULL, named_g_config,
"allow-update-forwarding", NULL, actx,
named_g_mctx, &view->upfwdacl));
}
/*
* Configure default allow-transfer and allow-notify ACLs so they
* can be inherited by zones.
*/
if (view->transferacl == NULL) {
CHECK(configure_view_acl(vconfig, config, named_g_config,
"allow-transfer", NULL, actx,
named_g_mctx, &view->transferacl));
}
if (view->notifyacl == NULL) {
CHECK(configure_view_acl(vconfig, config, named_g_config,
"allow-notify", NULL, actx,
named_g_mctx, &view->notifyacl));
}
obj = NULL;
result = named_config_get(maps, "provide-ixfr", &obj);
INSIST(result == ISC_R_SUCCESS);
view->provideixfr = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "request-nsid", &obj);
INSIST(result == ISC_R_SUCCESS);
view->requestnsid = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "send-cookie", &obj);
INSIST(result == ISC_R_SUCCESS);
view->sendcookie = cfg_obj_asboolean(obj);
obj = NULL;
if (view->pad_acl != NULL) {
dns_acl_detach(&view->pad_acl);
}
result = named_config_get(optionmaps, "response-padding", &obj);
if (result == ISC_R_SUCCESS) {
const cfg_obj_t *padobj = cfg_tuple_get(obj, "block-size");
const cfg_obj_t *aclobj = cfg_tuple_get(obj, "acl");
uint32_t padding = cfg_obj_asuint32(padobj);
if (padding > 512U) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"response-padding block-size cannot "
"exceed 512: lowering");
padding = 512U;
}
view->padding = (uint16_t)padding;
CHECK(cfg_acl_fromconfig(aclobj, config, named_g_lctx, actx,
named_g_mctx, 0, &view->pad_acl));
}
obj = NULL;
result = named_config_get(maps, "require-server-cookie", &obj);
INSIST(result == ISC_R_SUCCESS);
view->requireservercookie = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "v6-bias", &obj);
INSIST(result == ISC_R_SUCCESS);
view->v6bias = cfg_obj_asuint32(obj) * 1000;
obj = NULL;
result = named_config_get(maps, "max-clients-per-query", &obj);
INSIST(result == ISC_R_SUCCESS);
max_clients_per_query = cfg_obj_asuint32(obj);
obj = NULL;
result = named_config_get(maps, "clients-per-query", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_resolver_setclientsperquery(view->resolver, cfg_obj_asuint32(obj),
max_clients_per_query);
obj = NULL;
result = named_config_get(maps, "max-recursion-depth", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_resolver_setmaxdepth(view->resolver, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "max-recursion-queries", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_resolver_setmaxqueries(view->resolver, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "fetches-per-zone", &obj);
INSIST(result == ISC_R_SUCCESS);
obj2 = cfg_tuple_get(obj, "fetches");
dns_resolver_setfetchesperzone(view->resolver, cfg_obj_asuint32(obj2));
obj2 = cfg_tuple_get(obj, "response");
if (!cfg_obj_isvoid(obj2)) {
const char *resp = cfg_obj_asstring(obj2);
isc_result_t r = DNS_R_SERVFAIL;
if (strcasecmp(resp, "drop") == 0) {
r = DNS_R_DROP;
} else if (strcasecmp(resp, "fail") == 0) {
r = DNS_R_SERVFAIL;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
dns_resolver_setquotaresponse(view->resolver,
dns_quotatype_zone, r);
}
obj = NULL;
result = named_config_get(maps, "prefetch", &obj);
if (result == ISC_R_SUCCESS) {
const cfg_obj_t *trigger, *eligible;
trigger = cfg_tuple_get(obj, "trigger");
view->prefetch_trigger = cfg_obj_asuint32(trigger);
if (view->prefetch_trigger > 10) {
view->prefetch_trigger = 10;
}
eligible = cfg_tuple_get(obj, "eligible");
if (cfg_obj_isvoid(eligible)) {
int m;
for (m = 1; maps[m] != NULL; m++) {
obj = NULL;
result = named_config_get(&maps[m], "prefetch",
&obj);
INSIST(result == ISC_R_SUCCESS);
eligible = cfg_tuple_get(obj, "eligible");
if (cfg_obj_isuint32(eligible)) {
break;
}
}
INSIST(cfg_obj_isuint32(eligible));
}
view->prefetch_eligible = cfg_obj_asuint32(eligible);
if (view->prefetch_eligible < view->prefetch_trigger + 6) {
view->prefetch_eligible = view->prefetch_trigger + 6;
}
}
/*
* For now, there is only one kind of trusted keys, the
* "security roots".
*/
CHECK(configure_view_dnsseckeys(view, vconfig, config, bindkeys,
auto_root, mctx));
dns_resolver_resetmustbesecure(view->resolver);
obj = NULL;
result = named_config_get(maps, "dnssec-must-be-secure", &obj);
if (result == ISC_R_SUCCESS) {
CHECK(mustbesecure(obj, view->resolver));
}
obj = NULL;
result = named_config_get(maps, "nta-recheck", &obj);
INSIST(result == ISC_R_SUCCESS);
view->nta_recheck = cfg_obj_asduration(obj);
obj = NULL;
result = named_config_get(maps, "nta-lifetime", &obj);
INSIST(result == ISC_R_SUCCESS);
view->nta_lifetime = cfg_obj_asduration(obj);
obj = NULL;
result = named_config_get(maps, "preferred-glue", &obj);
if (result == ISC_R_SUCCESS) {
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "a") == 0) {
view->preferred_glue = dns_rdatatype_a;
} else if (strcasecmp(str, "aaaa") == 0) {
view->preferred_glue = dns_rdatatype_aaaa;
} else {
view->preferred_glue = 0;
}
} else {
view->preferred_glue = 0;
}
obj = NULL;
result = named_config_get(maps, "root-delegation-only", &obj);
if (result == ISC_R_SUCCESS) {
dns_view_setrootdelonly(view, true);
}
if (result == ISC_R_SUCCESS && !cfg_obj_isvoid(obj)) {
const cfg_obj_t *exclude;
dns_fixedname_t fixed;
dns_name_t *name;
name = dns_fixedname_initname(&fixed);
for (element = cfg_list_first(obj); element != NULL;
element = cfg_list_next(element))
{
exclude = cfg_listelt_value(element);
CHECK(dns_name_fromstring(
name, cfg_obj_asstring(exclude), 0, NULL));
CHECK(dns_view_excludedelegationonly(view, name));
}
} else {
dns_view_setrootdelonly(view, false);
}
/*
* Load DynDB modules.
*/
dyndb_list = NULL;
if (voptions != NULL) {
(void)cfg_map_get(voptions, "dyndb", &dyndb_list);
} else {
(void)cfg_map_get(config, "dyndb", &dyndb_list);
}
#ifdef HAVE_DLOPEN
for (element = cfg_list_first(dyndb_list); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *dyndb = cfg_listelt_value(element);
if (dctx == NULL) {
const void *hashinit = isc_hash_get_initializer();
CHECK(dns_dyndb_createctx(mctx, hashinit, named_g_lctx,
view, named_g_server->zonemgr,
named_g_server->task,
named_g_timermgr, &dctx));
}
CHECK(configure_dyndb(dyndb, mctx, dctx));
}
#endif /* ifdef HAVE_DLOPEN */
/*
* Load plugins.
*/
plugin_list = NULL;
if (voptions != NULL) {
(void)cfg_map_get(voptions, "plugin", &plugin_list);
} else {
(void)cfg_map_get(config, "plugin", &plugin_list);
}
#ifdef HAVE_DLOPEN
if (plugin_list != NULL) {
INSIST(view->hooktable == NULL);
CHECK(ns_hooktable_create(view->mctx,
(ns_hooktable_t **)&view->hooktable));
view->hooktable_free = ns_hooktable_free;
ns_plugins_create(view->mctx, (ns_plugins_t **)&view->plugins);
view->plugins_free = ns_plugins_free;
CHECK(cfg_pluginlist_foreach(config, plugin_list, named_g_lctx,
register_one_plugin, view));
}
#endif /* ifdef HAVE_DLOPEN */
/*
* Setup automatic empty zones. If recursion is off then
* they are disabled by default.
*/
obj = NULL;
(void)named_config_get(maps, "empty-zones-enable", &obj);
(void)named_config_get(maps, "disable-empty-zone", &disablelist);
if (obj == NULL && disablelist == NULL &&
view->rdclass == dns_rdataclass_in) {
empty_zones_enable = view->recursion;
} else if (view->rdclass == dns_rdataclass_in) {
if (obj != NULL) {
empty_zones_enable = cfg_obj_asboolean(obj);
} else {
empty_zones_enable = view->recursion;
}
} else {
empty_zones_enable = false;
}
if (empty_zones_enable) {
const char *empty;
int empty_zone = 0;
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t buffer;
char server[DNS_NAME_FORMATSIZE + 1];
char contact[DNS_NAME_FORMATSIZE + 1];
const char *empty_dbtype[4] = { "_builtin", "empty", NULL,
NULL };
int empty_dbtypec = 4;
dns_zonestat_level_t statlevel = dns_zonestat_none;
name = dns_fixedname_initname(&fixed);
obj = NULL;
result = named_config_get(maps, "empty-server", &obj);
if (result == ISC_R_SUCCESS) {
CHECK(dns_name_fromstring(name, cfg_obj_asstring(obj),
0, NULL));
isc_buffer_init(&buffer, server, sizeof(server) - 1);
CHECK(dns_name_totext(name, false, &buffer));
server[isc_buffer_usedlength(&buffer)] = 0;
empty_dbtype[2] = server;
} else {
empty_dbtype[2] = "@";
}
obj = NULL;
result = named_config_get(maps, "empty-contact", &obj);
if (result == ISC_R_SUCCESS) {
CHECK(dns_name_fromstring(name, cfg_obj_asstring(obj),
0, NULL));
isc_buffer_init(&buffer, contact, sizeof(contact) - 1);
CHECK(dns_name_totext(name, false, &buffer));
contact[isc_buffer_usedlength(&buffer)] = 0;
empty_dbtype[3] = contact;
} else {
empty_dbtype[3] = ".";
}
obj = NULL;
result = named_config_get(maps, "zone-statistics", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isboolean(obj)) {
if (cfg_obj_asboolean(obj)) {
statlevel = dns_zonestat_full;
} else {
statlevel = dns_zonestat_none;
}
} else {
const char *levelstr = cfg_obj_asstring(obj);
if (strcasecmp(levelstr, "full") == 0) {
statlevel = dns_zonestat_full;
} else if (strcasecmp(levelstr, "terse") == 0) {
statlevel = dns_zonestat_terse;
} else if (strcasecmp(levelstr, "none") == 0) {
statlevel = dns_zonestat_none;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
}
for (empty = empty_zones[empty_zone]; empty != NULL;
empty = empty_zones[++empty_zone])
{
dns_forwarders_t *dnsforwarders = NULL;
/*
* Look for zone on drop list.
*/
CHECK(dns_name_fromstring(name, empty, 0, NULL));
if (disablelist != NULL &&
on_disable_list(disablelist, name)) {
continue;
}
/*
* This zone already exists.
*/
(void)dns_view_findzone(view, name, &zone);
if (zone != NULL) {
dns_zone_detach(&zone);
continue;
}
/*
* If we would forward this name don't add a
* empty zone for it.
*/
result = dns_fwdtable_find(view->fwdtable, name, NULL,
&dnsforwarders);
if (result == ISC_R_SUCCESS &&
dnsforwarders->fwdpolicy == dns_fwdpolicy_only) {
continue;
}
/*
* See if we can re-use a existing zone.
*/
result = dns_viewlist_find(&named_g_server->viewlist,
view->name, view->rdclass,
&pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
{
goto cleanup;
}
if (pview != NULL) {
(void)dns_view_findzone(pview, name, &zone);
dns_view_detach(&pview);
}
CHECK(create_empty_zone(zone, name, view, zonelist,
empty_dbtype, empty_dbtypec,
statlevel));
if (zone != NULL) {
dns_zone_detach(&zone);
}
}
}
obj = NULL;
result = named_config_get(maps, "rate-limit", &obj);
if (result == ISC_R_SUCCESS) {
result = configure_rrl(view, config, obj);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
/*
* Set the servfail-ttl.
*/
obj = NULL;
result = named_config_get(maps, "servfail-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
fail_ttl = cfg_obj_asduration(obj);
if (fail_ttl > 30) {
fail_ttl = 30;
}
dns_view_setfailttl(view, fail_ttl);
/*
* Name space to look up redirect information in.
*/
obj = NULL;
result = named_config_get(maps, "nxdomain-redirect", &obj);
if (result == ISC_R_SUCCESS) {
dns_name_t *name = dns_fixedname_name(&view->redirectfixed);
CHECK(dns_name_fromstring(name, cfg_obj_asstring(obj), 0,
NULL));
view->redirectzone = name;
} else {
view->redirectzone = NULL;
}
/*
* Exceptions to DNSSEC validation.
*/
obj = NULL;
result = named_config_get(maps, "validate-except", &obj);
if (result == ISC_R_SUCCESS) {
result = dns_view_getntatable(view, &ntatable);
}
if (result == ISC_R_SUCCESS) {
for (element = cfg_list_first(obj); element != NULL;
element = cfg_list_next(element))
{
dns_fixedname_t fntaname;
dns_name_t *ntaname;
ntaname = dns_fixedname_initname(&fntaname);
obj = cfg_listelt_value(element);
CHECK(dns_name_fromstring(
ntaname, cfg_obj_asstring(obj), 0, NULL));
CHECK(dns_ntatable_add(ntatable, ntaname, true, 0,
0xffffffffU));
}
}
#ifdef HAVE_DNSTAP
/*
* Set up the dnstap environment and configure message
* types to log.
*/
CHECK(configure_dnstap(maps, view));
#endif /* HAVE_DNSTAP */
result = ISC_R_SUCCESS;
cleanup:
if (ntatable != NULL) {
dns_ntatable_detach(&ntatable);
}
if (clients != NULL) {
dns_acl_detach(&clients);
}
if (mapped != NULL) {
dns_acl_detach(&mapped);
}
if (excluded != NULL) {
dns_acl_detach(&excluded);
}
if (ring != NULL) {
dns_tsigkeyring_detach(&ring);
}
if (zone != NULL) {
dns_zone_detach(&zone);
}
if (dispatch4 != NULL) {
dns_dispatch_detach(&dispatch4);
}
if (dispatch6 != NULL) {
dns_dispatch_detach(&dispatch6);
}
if (resstats != NULL) {
isc_stats_detach(&resstats);
}
if (resquerystats != NULL) {
dns_stats_detach(&resquerystats);
}
if (order != NULL) {
dns_order_detach(&order);
}
if (cmctx != NULL) {
isc_mem_detach(&cmctx);
}
if (hmctx != NULL) {
isc_mem_detach(&hmctx);
}
if (cache != NULL) {
dns_cache_detach(&cache);
}
if (dctx != NULL) {
dns_dyndb_destroyctx(&dctx);
}
return (result);
}
static isc_result_t
configure_hints(dns_view_t *view, const char *filename) {
isc_result_t result;
dns_db_t *db;
db = NULL;
result = dns_rootns_create(view->mctx, view->rdclass, filename, &db);
if (result == ISC_R_SUCCESS) {
dns_view_sethints(view, db);
dns_db_detach(&db);
}
return (result);
}
static isc_result_t
configure_alternates(const cfg_obj_t *config, dns_view_t *view,
const cfg_obj_t *alternates) {
const cfg_obj_t *portobj;
const cfg_obj_t *addresses;
const cfg_listelt_t *element;
isc_result_t result = ISC_R_SUCCESS;
in_port_t port;
/*
* Determine which port to send requests to.
*/
CHECKM(named_config_getport(config, &port), "port");
if (alternates != NULL) {
portobj = cfg_tuple_get(alternates, "port");
if (cfg_obj_isuint32(portobj)) {
uint32_t val = cfg_obj_asuint32(portobj);
if (val > UINT16_MAX) {
cfg_obj_log(portobj, named_g_lctx,
ISC_LOG_ERROR,
"port '%u' out of range", val);
return (ISC_R_RANGE);
}
port = (in_port_t)val;
}
}
addresses = NULL;
if (alternates != NULL) {
addresses = cfg_tuple_get(alternates, "addresses");
}
for (element = cfg_list_first(addresses); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *alternate = cfg_listelt_value(element);
isc_sockaddr_t sa;
if (!cfg_obj_issockaddr(alternate)) {
dns_fixedname_t fixed;
dns_name_t *name;
const char *str = cfg_obj_asstring(
cfg_tuple_get(alternate, "name"));
isc_buffer_t buffer;
in_port_t myport = port;
isc_buffer_constinit(&buffer, str, strlen(str));
isc_buffer_add(&buffer, strlen(str));
name = dns_fixedname_initname(&fixed);
CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
NULL));
portobj = cfg_tuple_get(alternate, "port");
if (cfg_obj_isuint32(portobj)) {
uint32_t val = cfg_obj_asuint32(portobj);
if (val > UINT16_MAX) {
cfg_obj_log(portobj, named_g_lctx,
ISC_LOG_ERROR,
"port '%u' out of range",
val);
return (ISC_R_RANGE);
}
myport = (in_port_t)val;
}
CHECK(dns_resolver_addalternate(view->resolver, NULL,
name, myport));
continue;
}
sa = *cfg_obj_assockaddr(alternate);
if (isc_sockaddr_getport(&sa) == 0) {
isc_sockaddr_setport(&sa, port);
}
CHECK(dns_resolver_addalternate(view->resolver, &sa, NULL, 0));
}
cleanup:
return (result);
}
static isc_result_t
configure_forward(const cfg_obj_t *config, dns_view_t *view,
const dns_name_t *origin, const cfg_obj_t *forwarders,
const cfg_obj_t *forwardtype) {
const cfg_obj_t *portobj, *dscpobj;
const cfg_obj_t *faddresses;
const cfg_listelt_t *element;
dns_fwdpolicy_t fwdpolicy = dns_fwdpolicy_none;
dns_forwarderlist_t fwdlist;
dns_forwarder_t *fwd;
isc_result_t result;
in_port_t port;
isc_dscp_t dscp = -1;
ISC_LIST_INIT(fwdlist);
/*
* Determine which port to send forwarded requests to.
*/
CHECKM(named_config_getport(config, &port), "port");
if (forwarders != NULL) {
portobj = cfg_tuple_get(forwarders, "port");
if (cfg_obj_isuint32(portobj)) {
uint32_t val = cfg_obj_asuint32(portobj);
if (val > UINT16_MAX) {
cfg_obj_log(portobj, named_g_lctx,
ISC_LOG_ERROR,
"port '%u' out of range", val);
return (ISC_R_RANGE);
}
port = (in_port_t)val;
}
}
/*
* DSCP value for forwarded requests.
*/
dscp = named_g_dscp;
if (forwarders != NULL) {
dscpobj = cfg_tuple_get(forwarders, "dscp");
if (cfg_obj_isuint32(dscpobj)) {
if (cfg_obj_asuint32(dscpobj) > 63) {
cfg_obj_log(dscpobj, named_g_lctx,
ISC_LOG_ERROR,
"dscp value '%u' is out of range",
cfg_obj_asuint32(dscpobj));
return (ISC_R_RANGE);
}
dscp = (isc_dscp_t)cfg_obj_asuint32(dscpobj);
}
}
faddresses = NULL;
if (forwarders != NULL) {
faddresses = cfg_tuple_get(forwarders, "addresses");
}
for (element = cfg_list_first(faddresses); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *forwarder = cfg_listelt_value(element);
fwd = isc_mem_get(view->mctx, sizeof(dns_forwarder_t));
fwd->addr = *cfg_obj_assockaddr(forwarder);
if (isc_sockaddr_getport(&fwd->addr) == 0) {
isc_sockaddr_setport(&fwd->addr, port);
}
fwd->dscp = cfg_obj_getdscp(forwarder);
if (fwd->dscp == -1) {
fwd->dscp = dscp;
}
ISC_LINK_INIT(fwd, link);
ISC_LIST_APPEND(fwdlist, fwd, link);
}
if (ISC_LIST_EMPTY(fwdlist)) {
if (forwardtype != NULL) {
cfg_obj_log(forwardtype, named_g_lctx, ISC_LOG_WARNING,
"no forwarders seen; disabling "
"forwarding");
}
fwdpolicy = dns_fwdpolicy_none;
} else {
if (forwardtype == NULL) {
fwdpolicy = dns_fwdpolicy_first;
} else {
const char *forwardstr = cfg_obj_asstring(forwardtype);
if (strcasecmp(forwardstr, "first") == 0) {
fwdpolicy = dns_fwdpolicy_first;
} else if (strcasecmp(forwardstr, "only") == 0) {
fwdpolicy = dns_fwdpolicy_only;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
}
}
result = dns_fwdtable_addfwd(view->fwdtable, origin, &fwdlist,
fwdpolicy);
if (result != ISC_R_SUCCESS) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(origin, namebuf, sizeof(namebuf));
cfg_obj_log(forwarders, named_g_lctx, ISC_LOG_WARNING,
"could not set up forwarding for domain '%s': %s",
namebuf, isc_result_totext(result));
goto cleanup;
}
result = ISC_R_SUCCESS;
cleanup:
while (!ISC_LIST_EMPTY(fwdlist)) {
fwd = ISC_LIST_HEAD(fwdlist);
ISC_LIST_UNLINK(fwdlist, fwd, link);
isc_mem_put(view->mctx, fwd, sizeof(dns_forwarder_t));
}
return (result);
}
static isc_result_t
get_viewinfo(const cfg_obj_t *vconfig, const char **namep,
dns_rdataclass_t *classp) {
isc_result_t result = ISC_R_SUCCESS;
const char *viewname;
dns_rdataclass_t viewclass;
REQUIRE(namep != NULL && *namep == NULL);
REQUIRE(classp != NULL);
if (vconfig != NULL) {
const cfg_obj_t *classobj = NULL;
viewname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
classobj = cfg_tuple_get(vconfig, "class");
CHECK(named_config_getclass(classobj, dns_rdataclass_in,
&viewclass));
if (dns_rdataclass_ismeta(viewclass)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"view '%s': class must not be meta",
viewname);
CHECK(ISC_R_FAILURE);
}
} else {
viewname = "_default";
viewclass = dns_rdataclass_in;
}
*namep = viewname;
*classp = viewclass;
cleanup:
return (result);
}
/*
* Find a view based on its configuration info and attach to it.
*
* If 'vconfig' is NULL, attach to the default view.
*/
static isc_result_t
find_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
dns_view_t **viewp) {
isc_result_t result;
const char *viewname = NULL;
dns_rdataclass_t viewclass;
dns_view_t *view = NULL;
result = get_viewinfo(vconfig, &viewname, &viewclass);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
if (result != ISC_R_SUCCESS) {
return (result);
}
*viewp = view;
return (ISC_R_SUCCESS);
}
/*
* Create a new view and add it to the list.
*
* If 'vconfig' is NULL, create the default view.
*
* The view created is attached to '*viewp'.
*/
static isc_result_t
create_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
dns_view_t **viewp) {
isc_result_t result;
const char *viewname = NULL;
dns_rdataclass_t viewclass;
dns_view_t *view = NULL;
result = get_viewinfo(vconfig, &viewname, &viewclass);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
if (result == ISC_R_SUCCESS) {
return (ISC_R_EXISTS);
}
if (result != ISC_R_NOTFOUND) {
return (result);
}
INSIST(view == NULL);
result = dns_view_create(named_g_mctx, viewclass, viewname, &view);
if (result != ISC_R_SUCCESS) {
return (result);
}
isc_nonce_buf(view->secret, sizeof(view->secret));
ISC_LIST_APPEND(*viewlist, view, link);
dns_view_attach(view, viewp);
return (ISC_R_SUCCESS);
}
/*
* Configure or reconfigure a zone.
*/
static isc_result_t
configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
dns_viewlist_t *viewlist, dns_kasplist_t *kasplist,
cfg_aclconfctx_t *aclconf, bool added, bool old_rpz_ok,
bool modify) {
dns_view_t *pview = NULL; /* Production view */
dns_zone_t *zone = NULL; /* New or reused zone */
dns_zone_t *raw = NULL; /* New or reused raw zone */
dns_zone_t *dupzone = NULL;
const cfg_obj_t *options = NULL;
const cfg_obj_t *zoptions = NULL;
const cfg_obj_t *typeobj = NULL;
const cfg_obj_t *forwarders = NULL;
const cfg_obj_t *forwardtype = NULL;
const cfg_obj_t *ixfrfromdiffs = NULL;
const cfg_obj_t *only = NULL;
const cfg_obj_t *signing = NULL;
const cfg_obj_t *viewobj = NULL;
isc_result_t result;
isc_result_t tresult;
isc_buffer_t buffer;
dns_fixedname_t fixorigin;
dns_name_t *origin;
const char *zname;
dns_rdataclass_t zclass;
const char *ztypestr;
dns_rpz_num_t rpz_num;
bool zone_is_catz = false;
options = NULL;
(void)cfg_map_get(config, "options", &options);
zoptions = cfg_tuple_get(zconfig, "options");
/*
* Get the zone origin as a dns_name_t.
*/
zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
isc_buffer_constinit(&buffer, zname, strlen(zname));
isc_buffer_add(&buffer, strlen(zname));
dns_fixedname_init(&fixorigin);
CHECK(dns_name_fromtext(dns_fixedname_name(&fixorigin), &buffer,
dns_rootname, 0, NULL));
origin = dns_fixedname_name(&fixorigin);
CHECK(named_config_getclass(cfg_tuple_get(zconfig, "class"),
view->rdclass, &zclass));
if (zclass != view->rdclass) {
const char *vname = NULL;
if (vconfig != NULL) {
vname = cfg_obj_asstring(
cfg_tuple_get(vconfig, "name"));
} else {
vname = "<default view>";
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"zone '%s': wrong class for view '%s'", zname,
vname);
result = ISC_R_FAILURE;
goto cleanup;
}
(void)cfg_map_get(zoptions, "in-view", &viewobj);
if (viewobj != NULL) {
const char *inview = cfg_obj_asstring(viewobj);
dns_view_t *otherview = NULL;
if (viewlist == NULL) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"'in-view' option is not permitted in "
"dynamically added zones");
result = ISC_R_FAILURE;
goto cleanup;
}
result = dns_viewlist_find(viewlist, inview, view->rdclass,
&otherview);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"view '%s' is not yet defined.", inview);
result = ISC_R_FAILURE;
goto cleanup;
}
result = dns_view_findzone(otherview, origin, &zone);
dns_view_detach(&otherview);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"zone '%s' not defined in view '%s'", zname,
inview);
result = ISC_R_FAILURE;
goto cleanup;
}
CHECK(dns_view_addzone(view, zone));
dns_zone_detach(&zone);
/*
* If the zone contains a 'forwarders' statement, configure
* selective forwarding. Note: this is not inherited from the
* other view.
*/
forwarders = NULL;
result = cfg_map_get(zoptions, "forwarders", &forwarders);
if (result == ISC_R_SUCCESS) {
forwardtype = NULL;
(void)cfg_map_get(zoptions, "forward", &forwardtype);
CHECK(configure_forward(config, view, origin,
forwarders, forwardtype));
}
result = ISC_R_SUCCESS;
goto cleanup;
}
(void)cfg_map_get(zoptions, "type", &typeobj);
if (typeobj == NULL) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"zone '%s' 'type' not specified", zname);
result = ISC_R_FAILURE;
goto cleanup;
}
ztypestr = cfg_obj_asstring(typeobj);
/*
* "hints zones" aren't zones. If we've got one,
* configure it and return.
*/
if (strcasecmp(ztypestr, "hint") == 0) {
const cfg_obj_t *fileobj = NULL;
if (cfg_map_get(zoptions, "file", &fileobj) != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"zone '%s': 'file' not specified", zname);
result = ISC_R_FAILURE;
goto cleanup;
}
if (dns_name_equal(origin, dns_rootname)) {
const char *hintsfile = cfg_obj_asstring(fileobj);
CHECK(configure_hints(view, hintsfile));
/*
* Hint zones may also refer to delegation only points.
*/
only = NULL;
tresult = cfg_map_get(zoptions, "delegation-only",
&only);
if (tresult == ISC_R_SUCCESS && cfg_obj_asboolean(only))
{
CHECK(dns_view_adddelegationonly(view, origin));
}
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"ignoring non-root hint zone '%s'",
zname);
result = ISC_R_SUCCESS;
}
/* Skip ordinary zone processing. */
goto cleanup;
}
/*
* "forward zones" aren't zones either. Translate this syntax into
* the appropriate selective forwarding configuration and return.
*/
if (strcasecmp(ztypestr, "forward") == 0) {
forwardtype = NULL;
forwarders = NULL;
(void)cfg_map_get(zoptions, "forward", &forwardtype);
(void)cfg_map_get(zoptions, "forwarders", &forwarders);
CHECK(configure_forward(config, view, origin, forwarders,
forwardtype));
/*
* Forward zones may also set delegation only.
*/
only = NULL;
tresult = cfg_map_get(zoptions, "delegation-only", &only);
if (tresult == ISC_R_SUCCESS && cfg_obj_asboolean(only)) {
CHECK(dns_view_adddelegationonly(view, origin));
}
goto cleanup;
}
/*
* "delegation-only zones" aren't zones either.
*/
if (strcasecmp(ztypestr, "delegation-only") == 0) {
result = dns_view_adddelegationonly(view, origin);
goto cleanup;
}
/*
* Redirect zones only require minimal configuration.
*/
if (strcasecmp(ztypestr, "redirect") == 0) {
if (view->redirect != NULL) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"redirect zone already exists");
result = ISC_R_EXISTS;
goto cleanup;
}
result = dns_viewlist_find(viewlist, view->name, view->rdclass,
&pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS) {
goto cleanup;
}
if (pview != NULL && pview->redirect != NULL) {
dns_zone_attach(pview->redirect, &zone);
dns_zone_setview(zone, view);
} else {
CHECK(dns_zonemgr_createzone(named_g_server->zonemgr,
&zone));
CHECK(dns_zone_setorigin(zone, origin));
dns_zone_setview(zone, view);
CHECK(dns_zonemgr_managezone(named_g_server->zonemgr,
zone));
dns_zone_setstats(zone, named_g_server->zonestats);
}
CHECK(named_zone_configure(config, vconfig, zconfig, aclconf,
kasplist, zone, NULL));
dns_zone_attach(zone, &view->redirect);
goto cleanup;
}
if (!modify) {
/*
* Check for duplicates in the new zone table.
*/
result = dns_view_findzone(view, origin, &dupzone);
if (result == ISC_R_SUCCESS) {
/*
* We already have this zone!
*/
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"zone '%s' already exists", zname);
dns_zone_detach(&dupzone);
result = ISC_R_EXISTS;
goto cleanup;
}
INSIST(dupzone == NULL);
}
/*
* Note whether this is a response policy zone and which one if so,
* unless we are using RPZ service interface. In that case, the
* BIND zone database has nothing to do with rpz and so we don't care.
*/
for (rpz_num = 0;; ++rpz_num) {
if (view->rpzs == NULL || rpz_num >= view->rpzs->p.num_zones ||
view->rpzs->p.dnsrps_enabled)
{
rpz_num = DNS_RPZ_INVALID_NUM;
break;
}
if (dns_name_equal(&view->rpzs->zones[rpz_num]->origin, origin))
{
break;
}
}
if (view->catzs != NULL &&
dns_catz_get_zone(view->catzs, origin) != NULL) {
zone_is_catz = true;
}
/*
* See if we can reuse an existing zone. This is
* only possible if all of these are true:
* - The zone's view exists
* - A zone with the right name exists in the view
* - The zone is compatible with the config
* options (e.g., an existing master zone cannot
* be reused if the options specify a slave zone)
* - The zone was not and is still not a response policy zone
* or the zone is a policy zone with an unchanged number
* and we are using the old policy zone summary data.
*/
result = dns_viewlist_find(&named_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS) {
goto cleanup;
}
if (pview != NULL) {
result = dns_view_findzone(pview, origin, &zone);
}
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS) {
goto cleanup;
}
if (zone != NULL && !named_zone_reusable(zone, zconfig)) {
dns_zone_detach(&zone);
}
if (zone != NULL && (rpz_num != dns_zone_get_rpz_num(zone) ||
(rpz_num != DNS_RPZ_INVALID_NUM && !old_rpz_ok)))
{
dns_zone_detach(&zone);
}
if (zone != NULL) {
/*
* We found a reusable zone. Make it use the
* new view.
*/
dns_zone_setview(zone, view);
} else {
/*
* We cannot reuse an existing zone, we have
* to create a new one.
*/
CHECK(dns_zonemgr_createzone(named_g_server->zonemgr, &zone));
CHECK(dns_zone_setorigin(zone, origin));
dns_zone_setview(zone, view);
CHECK(dns_zonemgr_managezone(named_g_server->zonemgr, zone));
dns_zone_setstats(zone, named_g_server->zonestats);
}
if (rpz_num != DNS_RPZ_INVALID_NUM) {
result = dns_zone_rpz_enable(zone, view->rpzs, rpz_num);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"zone '%s': incompatible"
" masterfile-format or database"
" for a response policy zone",
zname);
goto cleanup;
}
}
if (zone_is_catz) {
dns_zone_catz_enable(zone, view->catzs);
}
/*
* If the zone contains a 'forwarders' statement, configure
* selective forwarding.
*/
forwarders = NULL;
if (cfg_map_get(zoptions, "forwarders", &forwarders) == ISC_R_SUCCESS) {
forwardtype = NULL;
(void)cfg_map_get(zoptions, "forward", &forwardtype);
CHECK(configure_forward(config, view, origin, forwarders,
forwardtype));
}
/*
* Stub and forward zones may also refer to delegation only points.
*/
only = NULL;
if (cfg_map_get(zoptions, "delegation-only", &only) == ISC_R_SUCCESS) {
if (cfg_obj_asboolean(only)) {
CHECK(dns_view_adddelegationonly(view, origin));
}
}
/*
* Mark whether the zone was originally added at runtime or not
*/
dns_zone_setadded(zone, added);
signing = NULL;
if ((strcasecmp(ztypestr, "primary") == 0 ||
strcasecmp(ztypestr, "master") == 0 ||
strcasecmp(ztypestr, "secondary") == 0 ||
strcasecmp(ztypestr, "slave") == 0) &&
((cfg_map_get(zoptions, "inline-signing", &signing) ==
ISC_R_SUCCESS &&
cfg_obj_asboolean(signing)) ||
(cfg_map_get(zoptions, "dnssec-policy", &signing) ==
ISC_R_SUCCESS &&
signing != NULL &&
strcmp(cfg_obj_asstring(signing), "none") != 0)))
{
dns_zone_getraw(zone, &raw);
if (raw == NULL) {
CHECK(dns_zone_create(&raw, mctx));
CHECK(dns_zone_setorigin(raw, origin));
dns_zone_setview(raw, view);
dns_zone_setstats(raw, named_g_server->zonestats);
CHECK(dns_zone_link(zone, raw));
}
if (cfg_map_get(zoptions, "ixfr-from-differences",
&ixfrfromdiffs) == ISC_R_SUCCESS)
{
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"zone '%s': 'ixfr-from-differences' is "
"ignored for inline-signed zones",
zname);
}
}
/*
* Configure the zone.
*/
CHECK(named_zone_configure(config, vconfig, zconfig, aclconf, kasplist,
zone, raw));
/*
* Add the zone to its view in the new view list.
*/
if (!modify) {
CHECK(dns_view_addzone(view, zone));
}
if (zone_is_catz) {
/*
* force catz reload if the zone is loaded;
* if it's not it'll get reloaded on zone load
*/
dns_db_t *db = NULL;
tresult = dns_zone_getdb(zone, &db);
if (tresult == ISC_R_SUCCESS) {
dns_catz_dbupdate_callback(db, view->catzs);
dns_db_detach(&db);
}
}
/*
* Ensure that zone keys are reloaded on reconfig
*/
if ((dns_zone_getkeyopts(zone) & DNS_ZONEKEY_MAINTAIN) != 0) {
dns_zone_rekey(zone, false);
}
cleanup:
if (zone != NULL) {
dns_zone_detach(&zone);
}
if (raw != NULL) {
dns_zone_detach(&raw);
}
if (pview != NULL) {
dns_view_detach(&pview);
}
return (result);
}
/*
* Configure built-in zone for storing managed-key data.
*/
static isc_result_t
add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx) {
isc_result_t result;
dns_view_t *pview = NULL;
dns_zone_t *zone = NULL;
dns_acl_t *none = NULL;
char filename[PATH_MAX];
bool defaultview;
REQUIRE(view != NULL);
/* See if we can re-use an existing keydata zone. */
result = dns_viewlist_find(&named_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS) {
return (result);
}
if (pview != NULL) {
if (pview->managed_keys != NULL) {
dns_zone_attach(pview->managed_keys,
&view->managed_keys);
dns_zone_setview(pview->managed_keys, view);
dns_view_detach(&pview);
dns_zone_synckeyzone(view->managed_keys);
return (ISC_R_SUCCESS);
}
dns_view_detach(&pview);
}
/* No existing keydata zone was found; create one */
CHECK(dns_zonemgr_createzone(named_g_server->zonemgr, &zone));
CHECK(dns_zone_setorigin(zone, dns_rootname));
defaultview = (strcmp(view->name, "_default") == 0);
CHECK(isc_file_sanitize(
directory, defaultview ? "managed-keys" : view->name,
defaultview ? "bind" : "mkeys", filename, sizeof(filename)));
CHECK(dns_zone_setfile(zone, filename, dns_masterformat_text,
&dns_master_style_default));
dns_zone_setview(zone, view);
dns_zone_settype(zone, dns_zone_key);
dns_zone_setclass(zone, view->rdclass);
CHECK(dns_zonemgr_managezone(named_g_server->zonemgr, zone));
CHECK(dns_acl_none(mctx, &none));
dns_zone_setqueryacl(zone, none);
dns_zone_setqueryonacl(zone, none);
dns_acl_detach(&none);
dns_zone_setdialup(zone, dns_dialuptype_no);
dns_zone_setnotifytype(zone, dns_notifytype_no);
dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, true);
dns_zone_setjournalsize(zone, 0);
dns_zone_setstats(zone, named_g_server->zonestats);
CHECK(setquerystats(zone, mctx, dns_zonestat_none));
if (view->managed_keys != NULL) {
dns_zone_detach(&view->managed_keys);
}
dns_zone_attach(zone, &view->managed_keys);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"set up managed keys zone for view %s, file '%s'",
view->name, filename);
cleanup:
if (zone != NULL) {
dns_zone_detach(&zone);
}
if (none != NULL) {
dns_acl_detach(&none);
}
return (result);
}
/*
* Configure a single server quota.
*/
static void
configure_server_quota(const cfg_obj_t **maps, const char *name,
isc_quota_t *quota) {
const cfg_obj_t *obj = NULL;
isc_result_t result;
result = named_config_get(maps, name, &obj);
INSIST(result == ISC_R_SUCCESS);
isc_quota_max(quota, cfg_obj_asuint32(obj));
}
/*
* This function is called as soon as the 'directory' statement has been
* parsed. This can be extended to support other options if necessary.
*/
static isc_result_t
directory_callback(const char *clausename, const cfg_obj_t *obj, void *arg) {
isc_result_t result;
const char *directory;
REQUIRE(strcasecmp("directory", clausename) == 0);
UNUSED(arg);
UNUSED(clausename);
/*
* Change directory.
*/
directory = cfg_obj_asstring(obj);
if (!isc_file_ischdiridempotent(directory)) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"option 'directory' contains relative path '%s'",
directory);
}
if (!isc_file_isdirwritable(directory)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"directory '%s' is not writable", directory);
return (ISC_R_NOPERM);
}
result = isc_dir_chdir(directory);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"change directory to '%s' failed: %s", directory,
isc_result_totext(result));
return (result);
}
return (ISC_R_SUCCESS);
}
static isc_result_t
add_listenelt(isc_mem_t *mctx, ns_listenlist_t *list, isc_sockaddr_t *addr,
isc_dscp_t dscp, bool wcardport_ok) {
ns_listenelt_t *lelt = NULL;
dns_acl_t *src_acl = NULL;
isc_result_t result;
isc_sockaddr_t any_sa6;
isc_netaddr_t netaddr;
REQUIRE(isc_sockaddr_pf(addr) == AF_INET6);
isc_sockaddr_any6(&any_sa6);
if (!isc_sockaddr_equal(&any_sa6, addr) &&
(wcardport_ok || isc_sockaddr_getport(addr) != 0))
{
isc_netaddr_fromin6(&netaddr, &addr->type.sin6.sin6_addr);
result = dns_acl_create(mctx, 0, &src_acl);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = dns_iptable_addprefix(src_acl->iptable, &netaddr, 128,
true);
if (result != ISC_R_SUCCESS) {
goto clean;
}
result = ns_listenelt_create(mctx, isc_sockaddr_getport(addr),
dscp, src_acl, &lelt);
if (result != ISC_R_SUCCESS) {
goto clean;
}
ISC_LIST_APPEND(list->elts, lelt, link);
}
return (ISC_R_SUCCESS);
clean:
INSIST(lelt == NULL);
dns_acl_detach(&src_acl);
return (result);
}
/*
* Make a list of xxx-source addresses and call ns_interfacemgr_adjust()
* to update the listening interfaces accordingly.
* We currently only consider IPv6, because this only affects IPv6 wildcard
* sockets.
*/
static void
adjust_interfaces(named_server_t *server, isc_mem_t *mctx) {
isc_result_t result;
ns_listenlist_t *list = NULL;
dns_view_t *view;
dns_zone_t *zone, *next;
isc_sockaddr_t addr, *addrp;
isc_dscp_t dscp = -1;
result = ns_listenlist_create(mctx, &list);
if (result != ISC_R_SUCCESS) {
return;
}
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
dns_dispatch_t *dispatch6;
dispatch6 = dns_resolver_dispatchv6(view->resolver);
if (dispatch6 == NULL) {
continue;
}
result = dns_dispatch_getlocaladdress(dispatch6, &addr);
if (result != ISC_R_SUCCESS) {
goto fail;
}
/*
* We always add non-wildcard address regardless of whether
* the port is 'any' (the fourth arg is TRUE): if the port is
* specific, we need to add it since it may conflict with a
* listening interface; if it's zero, we'll dynamically open
* query ports, and some of them may override an existing
* wildcard IPv6 port.
*/
/* XXXMPA fix dscp */
result = add_listenelt(mctx, list, &addr, dscp, true);
if (result != ISC_R_SUCCESS) {
goto fail;
}
}
zone = NULL;
for (result = dns_zone_first(server->zonemgr, &zone);
result == ISC_R_SUCCESS;
next = NULL, result = dns_zone_next(zone, &next), zone = next)
{
dns_view_t *zoneview;
/*
* At this point the zone list may contain a stale zone
* just removed from the configuration. To see the validity,
* check if the corresponding view is in our current view list.
* There may also be old zones that are still in the process
* of shutting down and have detached from their old view
* (zoneview == NULL).
*/
zoneview = dns_zone_getview(zone);
if (zoneview == NULL) {
continue;
}
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL && view != zoneview;
view = ISC_LIST_NEXT(view, link))
{
}
if (view == NULL) {
continue;
}
addrp = dns_zone_getnotifysrc6(zone);
dscp = dns_zone_getnotifysrc6dscp(zone);
result = add_listenelt(mctx, list, addrp, dscp, false);
if (result != ISC_R_SUCCESS) {
goto fail;
}
addrp = dns_zone_getxfrsource6(zone);
dscp = dns_zone_getxfrsource6dscp(zone);
result = add_listenelt(mctx, list, addrp, dscp, false);
if (result != ISC_R_SUCCESS) {
goto fail;
}
}
ns_interfacemgr_adjust(server->interfacemgr, list, true);
clean:
ns_listenlist_detach(&list);
return;
fail:
/*
* Even when we failed the procedure, most of other interfaces
* should work correctly. We therefore just warn it.
*/
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"could not adjust the listen-on list; "
"some interfaces may not work");
goto clean;
}
/*
* This event callback is invoked to do periodic network interface
* scanning.
*/
static void
interface_timer_tick(isc_task_t *task, isc_event_t *event) {
named_server_t *server = (named_server_t *)event->ev_arg;
INSIST(task == server->task);
UNUSED(task);
isc_event_free(&event);
ns_interfacemgr_scan(server->interfacemgr, false);
}
static void
heartbeat_timer_tick(isc_task_t *task, isc_event_t *event) {
named_server_t *server = (named_server_t *)event->ev_arg;
dns_view_t *view;
UNUSED(task);
isc_event_free(&event);
view = ISC_LIST_HEAD(server->viewlist);
while (view != NULL) {
dns_view_dialup(view);
view = ISC_LIST_NEXT(view, link);
}
}
typedef struct {
isc_mem_t *mctx;
isc_task_t *task;
dns_rdataset_t rdataset;
dns_rdataset_t sigrdataset;
dns_fetch_t *fetch;
} ns_tat_t;
static int
cid(const void *a, const void *b) {
const uint16_t ida = *(const uint16_t *)a;
const uint16_t idb = *(const uint16_t *)b;
if (ida < idb) {
return (-1);
} else if (ida > idb) {
return (1);
} else {
return (0);
}
}
static void
tat_done(isc_task_t *task, isc_event_t *event) {
dns_fetchevent_t *devent;
ns_tat_t *tat;
UNUSED(task);
INSIST(event != NULL && event->ev_type == DNS_EVENT_FETCHDONE);
INSIST(event->ev_arg != NULL);
tat = event->ev_arg;
devent = (dns_fetchevent_t *)event;
/* Free resources which are not of interest */
if (devent->node != NULL) {
dns_db_detachnode(devent->db, &devent->node);
}
if (devent->db != NULL) {
dns_db_detach(&devent->db);
}
isc_event_free(&event);
dns_resolver_destroyfetch(&tat->fetch);
if (dns_rdataset_isassociated(&tat->rdataset)) {
dns_rdataset_disassociate(&tat->rdataset);
}
if (dns_rdataset_isassociated(&tat->sigrdataset)) {
dns_rdataset_disassociate(&tat->sigrdataset);
}
isc_task_detach(&tat->task);
isc_mem_putanddetach(&tat->mctx, tat, sizeof(*tat));
}
struct dotat_arg {
dns_view_t *view;
isc_task_t *task;
};
/*%
* Prepare the QNAME for the TAT query to be sent by processing the trust
* anchors present at 'keynode' of 'keytable'. Store the result in 'dst' and
* the domain name which 'keynode' is associated with in 'origin'.
*
* A maximum of 12 key IDs can be reported in a single TAT query due to the
* 63-octet length limit for any single label in a domain name. If there are
* more than 12 keys configured at 'keynode', only the first 12 will be
* reported in the TAT query.
*/
static isc_result_t
get_tat_qname(dns_name_t *target, dns_name_t *keyname, dns_keynode_t *keynode) {
dns_rdataset_t *dsset = NULL;
unsigned int i, n = 0;
uint16_t ids[12];
isc_textregion_t r;
char label[64];
int m;
if ((dsset = dns_keynode_dsset(keynode)) != NULL) {
isc_result_t result;
for (result = dns_rdataset_first(dsset);
result == ISC_R_SUCCESS; result = dns_rdataset_next(dsset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_ds_t ds;
dns_rdata_reset(&rdata);
dns_rdataset_current(dsset, &rdata);
result = dns_rdata_tostruct(&rdata, &ds, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (n < (sizeof(ids) / sizeof(ids[0]))) {
ids[n] = ds.key_tag;
n++;
}
}
}
if (n == 0) {
return (DNS_R_EMPTYNAME);
}
if (n > 1) {
qsort(ids, n, sizeof(ids[0]), cid);
}
/*
* Encoded as "_ta-xxxx\(-xxxx\)*" where xxxx is the hex version of
* of the keyid.
*/
label[0] = 0;
r.base = label;
r.length = sizeof(label);
m = snprintf(r.base, r.length, "_ta");
if (m < 0 || (unsigned)m > r.length) {
return (ISC_R_FAILURE);
}
isc_textregion_consume(&r, m);
for (i = 0; i < n; i++) {
m = snprintf(r.base, r.length, "-%04x", ids[i]);
if (m < 0 || (unsigned)m > r.length) {
return (ISC_R_FAILURE);
}
isc_textregion_consume(&r, m);
}
return (dns_name_fromstring2(target, label, keyname, 0, NULL));
}
static void
dotat(dns_keytable_t *keytable, dns_keynode_t *keynode, dns_name_t *keyname,
void *arg) {
struct dotat_arg *dotat_arg = arg;
char namebuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed, fdomain;
dns_name_t *tatname, *domain;
dns_rdataset_t nameservers;
isc_result_t result;
dns_view_t *view;
isc_task_t *task;
ns_tat_t *tat;
REQUIRE(keytable != NULL);
REQUIRE(keynode != NULL);
REQUIRE(dotat_arg != NULL);
view = dotat_arg->view;
task = dotat_arg->task;
tatname = dns_fixedname_initname(&fixed);
result = get_tat_qname(tatname, keyname, keynode);
if (result != ISC_R_SUCCESS) {
return;
}
dns_name_format(tatname, namebuf, sizeof(namebuf));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"%s: sending trust-anchor-telemetry query '%s/NULL'",
view->name, namebuf);
tat = isc_mem_get(dotat_arg->view->mctx, sizeof(*tat));
tat->mctx = NULL;
tat->task = NULL;
tat->fetch = NULL;
dns_rdataset_init(&tat->rdataset);
dns_rdataset_init(&tat->sigrdataset);
isc_mem_attach(dotat_arg->view->mctx, &tat->mctx);
isc_task_attach(task, &tat->task);
/*
* TAT queries should be sent to the authoritative servers for a given
* zone. If this function is called for a keytable node corresponding
* to a locally served zone, calling dns_resolver_createfetch() with
* NULL 'domain' and 'nameservers' arguments will cause 'tatname' to be
* resolved locally, without sending any TAT queries upstream.
*
* Work around this issue by calling dns_view_findzonecut() first. If
* the zone is served locally, the NS RRset for the given domain name
* will be retrieved from local data; if it is not, the deepest zone
* cut we have for it will be retrieved from cache. In either case,
* passing the results to dns_resolver_createfetch() will prevent it
* from returning NXDOMAIN for 'tatname' while still allowing it to
* chase down any potential delegations returned by upstream servers in
* order to eventually find the destination host to send the TAT query
* to.
*
* After the dns_view_findzonecut() call, 'domain' will hold the
* deepest zone cut we can find for 'keyname' while 'nameservers' will
* hold the NS RRset at that zone cut.
*/
domain = dns_fixedname_initname(&fdomain);
dns_rdataset_init(&nameservers);
result = dns_view_findzonecut(view, keyname, domain, NULL, 0, 0, true,
true, &nameservers, NULL);
if (result == ISC_R_SUCCESS) {
result = dns_resolver_createfetch(
view->resolver, tatname, dns_rdatatype_null, domain,
&nameservers, NULL, NULL, 0, 0, 0, NULL, tat->task,
tat_done, tat, &tat->rdataset, &tat->sigrdataset,
&tat->fetch);
}
/*
* 'domain' holds the dns_name_t pointer inside a dst_key_t structure.
* dns_resolver_createfetch() creates its own copy of 'domain' if it
* succeeds. Thus, 'domain' is not freed here.
*
* Even if dns_view_findzonecut() returned something else than
* ISC_R_SUCCESS, it still could have associated 'nameservers'.
* dns_resolver_createfetch() creates its own copy of 'nameservers' if
* it succeeds. Thus, we need to check whether 'nameservers' is
* associated and release it if it is.
*/
if (dns_rdataset_isassociated(&nameservers)) {
dns_rdataset_disassociate(&nameservers);
}
if (result != ISC_R_SUCCESS) {
isc_task_detach(&tat->task);
isc_mem_putanddetach(&tat->mctx, tat, sizeof(*tat));
}
}
static void
tat_timer_tick(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
named_server_t *server = (named_server_t *)event->ev_arg;
struct dotat_arg arg;
dns_view_t *view;
dns_keytable_t *secroots = NULL;
isc_event_free(&event);
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (!view->trust_anchor_telemetry || !view->enablevalidation) {
continue;
}
result = dns_view_getsecroots(view, &secroots);
if (result != ISC_R_SUCCESS) {
continue;
}
arg.view = view;
arg.task = task;
(void)dns_keytable_forall(secroots, dotat, &arg);
dns_keytable_detach(&secroots);
}
}
static void
pps_timer_tick(isc_task_t *task, isc_event_t *event) {
static unsigned int oldrequests = 0;
unsigned int requests = atomic_load_relaxed(&ns_client_requests);
UNUSED(task);
isc_event_free(&event);
/*
* Don't worry about wrapping as the overflow result will be right.
*/
dns_pps = (requests - oldrequests) / 1200;
oldrequests = requests;
}
/*
* Replace the current value of '*field', a dynamically allocated
* string or NULL, with a dynamically allocated copy of the
* null-terminated string pointed to by 'value', or NULL.
*/
static isc_result_t
setstring(named_server_t *server, char **field, const char *value) {
char *copy;
if (value != NULL) {
copy = isc_mem_strdup(server->mctx, value);
} else {
copy = NULL;
}
if (*field != NULL) {
isc_mem_free(server->mctx, *field);
}
*field = copy;
return (ISC_R_SUCCESS);
}
/*
* Replace the current value of '*field', a dynamically allocated
* string or NULL, with another dynamically allocated string
* or NULL if whether 'obj' is a string or void value, respectively.
*/
static isc_result_t
setoptstring(named_server_t *server, char **field, const cfg_obj_t *obj) {
if (cfg_obj_isvoid(obj)) {
return (setstring(server, field, NULL));
} else {
return (setstring(server, field, cfg_obj_asstring(obj)));
}
}
static void
set_limit(const cfg_obj_t **maps, const char *configname,
const char *description, isc_resource_t resourceid,
isc_resourcevalue_t defaultvalue) {
const cfg_obj_t *obj = NULL;
const char *resource;
isc_resourcevalue_t value;
isc_result_t result;
if (named_config_get(maps, configname, &obj) != ISC_R_SUCCESS) {
return;
}
if (cfg_obj_isstring(obj)) {
resource = cfg_obj_asstring(obj);
if (strcasecmp(resource, "unlimited") == 0) {
value = ISC_RESOURCE_UNLIMITED;
} else {
INSIST(strcasecmp(resource, "default") == 0);
value = defaultvalue;
}
} else {
value = cfg_obj_asuint64(obj);
}
result = isc_resource_setlimit(resourceid, value);
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL, NAMED_LOGMODULE_SERVER,
result == ISC_R_SUCCESS ? ISC_LOG_DEBUG(3) : ISC_LOG_WARNING,
"set maximum %s to %" PRIu64 ": %s", description, value,
isc_result_totext(result));
}
#define SETLIMIT(cfgvar, resource, description) \
set_limit(maps, cfgvar, description, isc_resource_##resource, \
named_g_init##resource)
static void
set_limits(const cfg_obj_t **maps) {
SETLIMIT("stacksize", stacksize, "stack size");
SETLIMIT("datasize", datasize, "data size");
SETLIMIT("coresize", coresize, "core size");
SETLIMIT("files", openfiles, "open files");
}
static void
portset_fromconf(isc_portset_t *portset, const cfg_obj_t *ports,
bool positive) {
const cfg_listelt_t *element;
for (element = cfg_list_first(ports); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *obj = cfg_listelt_value(element);
if (cfg_obj_isuint32(obj)) {
in_port_t port = (in_port_t)cfg_obj_asuint32(obj);
if (positive) {
isc_portset_add(portset, port);
} else {
isc_portset_remove(portset, port);
}
} else {
const cfg_obj_t *obj_loport, *obj_hiport;
in_port_t loport, hiport;
obj_loport = cfg_tuple_get(obj, "loport");
loport = (in_port_t)cfg_obj_asuint32(obj_loport);
obj_hiport = cfg_tuple_get(obj, "hiport");
hiport = (in_port_t)cfg_obj_asuint32(obj_hiport);
if (positive) {
isc_portset_addrange(portset, loport, hiport);
} else {
isc_portset_removerange(portset, loport,
hiport);
}
}
}
}
static isc_result_t
removed(dns_zone_t *zone, void *uap) {
const char *type;
if (dns_zone_getview(zone) != uap) {
return (ISC_R_SUCCESS);
}
switch (dns_zone_gettype(zone)) {
case dns_zone_master:
type = "master";
break;
case dns_zone_slave:
type = "slave";
break;
case dns_zone_mirror:
type = "mirror";
break;
case dns_zone_stub:
type = "stub";
break;
case dns_zone_staticstub:
type = "static-stub";
break;
case dns_zone_redirect:
type = "redirect";
break;
default:
type = "other";
break;
}
dns_zone_log(zone, ISC_LOG_INFO, "(%s) removed", type);
return (ISC_R_SUCCESS);
}
static void
cleanup_session_key(named_server_t *server, isc_mem_t *mctx) {
if (server->session_keyfile != NULL) {
isc_file_remove(server->session_keyfile);
isc_mem_free(mctx, server->session_keyfile);
server->session_keyfile = NULL;
}
if (server->session_keyname != NULL) {
if (dns_name_dynamic(server->session_keyname)) {
dns_name_free(server->session_keyname, mctx);
}
isc_mem_put(mctx, server->session_keyname, sizeof(dns_name_t));
server->session_keyname = NULL;
}
if (server->sessionkey != NULL) {
dns_tsigkey_detach(&server->sessionkey);
}
server->session_keyalg = DST_ALG_UNKNOWN;
server->session_keybits = 0;
}
static isc_result_t
generate_session_key(const char *filename, const char *keynamestr,
const dns_name_t *keyname, const char *algstr,
const dns_name_t *algname, unsigned int algtype,
uint16_t bits, isc_mem_t *mctx, dns_tsigkey_t **tsigkeyp) {
isc_result_t result = ISC_R_SUCCESS;
dst_key_t *key = NULL;
isc_buffer_t key_txtbuffer;
isc_buffer_t key_rawbuffer;
char key_txtsecret[256];
char key_rawsecret[64];
isc_region_t key_rawregion;
isc_stdtime_t now;
dns_tsigkey_t *tsigkey = NULL;
FILE *fp = NULL;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"generating session key for dynamic DNS");
/* generate key */
result = dst_key_generate(keyname, algtype, bits, 1, 0,
DNS_KEYPROTO_ANY, dns_rdataclass_in, mctx,
&key, NULL);
if (result != ISC_R_SUCCESS) {
return (result);
}
/*
* Dump the key to the buffer for later use. Should be done before
* we transfer the ownership of key to tsigkey.
*/
isc_buffer_init(&key_rawbuffer, &key_rawsecret, sizeof(key_rawsecret));
CHECK(dst_key_tobuffer(key, &key_rawbuffer));
isc_buffer_usedregion(&key_rawbuffer, &key_rawregion);
isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
CHECK(isc_base64_totext(&key_rawregion, -1, "", &key_txtbuffer));
/* Store the key in tsigkey. */
isc_stdtime_get(&now);
CHECK(dns_tsigkey_createfromkey(dst_key_name(key), algname, key, false,
NULL, now, now, mctx, NULL, &tsigkey));
/* Dump the key to the key file. */
fp = named_os_openfile(filename, S_IRUSR | S_IWUSR, true);
if (fp == NULL) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"could not create %s", filename);
result = ISC_R_NOPERM;
goto cleanup;
}
fprintf(fp,
"key \"%s\" {\n"
"\talgorithm %s;\n"
"\tsecret \"%.*s\";\n};\n",
keynamestr, algstr, (int)isc_buffer_usedlength(&key_txtbuffer),
(char *)isc_buffer_base(&key_txtbuffer));
CHECK(isc_stdio_flush(fp));
result = isc_stdio_close(fp);
fp = NULL;
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
dst_key_free(&key);
*tsigkeyp = tsigkey;
return (ISC_R_SUCCESS);
cleanup:
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"failed to generate session key "
"for dynamic DNS: %s",
isc_result_totext(result));
if (fp != NULL) {
(void)isc_stdio_close(fp);
(void)isc_file_remove(filename);
}
if (tsigkey != NULL) {
dns_tsigkey_detach(&tsigkey);
}
if (key != NULL) {
dst_key_free(&key);
}
return (result);
}
static isc_result_t
configure_session_key(const cfg_obj_t **maps, named_server_t *server,
isc_mem_t *mctx) {
const char *keyfile, *keynamestr, *algstr;
unsigned int algtype;
dns_fixedname_t fname;
dns_name_t *keyname;
const dns_name_t *algname;
isc_buffer_t buffer;
uint16_t bits;
const cfg_obj_t *obj;
bool need_deleteold = false;
bool need_createnew = false;
isc_result_t result;
obj = NULL;
result = named_config_get(maps, "session-keyfile", &obj);
if (result == ISC_R_SUCCESS) {
if (cfg_obj_isvoid(obj)) {
keyfile = NULL; /* disable it */
} else {
keyfile = cfg_obj_asstring(obj);
}
} else {
keyfile = named_g_defaultsessionkeyfile;
}
obj = NULL;
result = named_config_get(maps, "session-keyname", &obj);
INSIST(result == ISC_R_SUCCESS);
keynamestr = cfg_obj_asstring(obj);
isc_buffer_constinit(&buffer, keynamestr, strlen(keynamestr));
isc_buffer_add(&buffer, strlen(keynamestr));
keyname = dns_fixedname_initname(&fname);
result = dns_name_fromtext(keyname, &buffer, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS) {
return (result);
}
obj = NULL;
result = named_config_get(maps, "session-keyalg", &obj);
INSIST(result == ISC_R_SUCCESS);
algstr = cfg_obj_asstring(obj);
algname = NULL;
result = named_config_getkeyalgorithm2(algstr, &algname, &algtype,
&bits);
if (result != ISC_R_SUCCESS) {
const char *s = " (keeping current key)";
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"session-keyalg: "
"unsupported or unknown algorithm '%s'%s",
algstr, server->session_keyfile != NULL ? s : "");
return (result);
}
/* See if we need to (re)generate a new key. */
if (keyfile == NULL) {
if (server->session_keyfile != NULL) {
need_deleteold = true;
}
} else if (server->session_keyfile == NULL) {
need_createnew = true;
} else if (strcmp(keyfile, server->session_keyfile) != 0 ||
!dns_name_equal(server->session_keyname, keyname) ||
server->session_keyalg != algtype ||
server->session_keybits != bits)
{
need_deleteold = true;
need_createnew = true;
}
if (need_deleteold) {
INSIST(server->session_keyfile != NULL);
INSIST(server->session_keyname != NULL);
INSIST(server->sessionkey != NULL);
cleanup_session_key(server, mctx);
}
if (need_createnew) {
INSIST(server->sessionkey == NULL);
INSIST(server->session_keyfile == NULL);
INSIST(server->session_keyname == NULL);
INSIST(server->session_keyalg == DST_ALG_UNKNOWN);
INSIST(server->session_keybits == 0);
server->session_keyname = isc_mem_get(mctx, sizeof(dns_name_t));
dns_name_init(server->session_keyname, NULL);
dns_name_dup(keyname, mctx, server->session_keyname);
server->session_keyfile = isc_mem_strdup(mctx, keyfile);
server->session_keyalg = algtype;
server->session_keybits = bits;
CHECK(generate_session_key(keyfile, keynamestr, keyname, algstr,
algname, algtype, bits, mctx,
&server->sessionkey));
}
return (result);
cleanup:
cleanup_session_key(server, mctx);
return (result);
}
#ifndef HAVE_LMDB
static isc_result_t
count_newzones(dns_view_t *view, ns_cfgctx_t *nzcfg, int *num_zonesp) {
isc_result_t result;
/* The new zone file may not exist. That is OK. */
if (!isc_file_exists(view->new_zone_file)) {
*num_zonesp = 0;
return (ISC_R_SUCCESS);
}
/*
* In the case of NZF files, we also parse the configuration in
* the file at this stage.
*
* This may be called in multiple views, so we reset
* the parser each time.
*/
cfg_parser_reset(named_g_addparser);
result = cfg_parse_file(named_g_addparser, view->new_zone_file,
&cfg_type_addzoneconf, &nzcfg->nzf_config);
if (result == ISC_R_SUCCESS) {
int num_zones;
num_zones = count_zones(nzcfg->nzf_config);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"NZF file '%s' contains %d zones",
view->new_zone_file, num_zones);
if (num_zonesp != NULL) {
*num_zonesp = num_zones;
}
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error parsing NZF file '%s': %s",
view->new_zone_file, isc_result_totext(result));
}
return (result);
}
#else /* HAVE_LMDB */
static isc_result_t
count_newzones(dns_view_t *view, ns_cfgctx_t *nzcfg, int *num_zonesp) {
isc_result_t result;
int n;
UNUSED(nzcfg);
REQUIRE(num_zonesp != NULL);
CHECK(migrate_nzf(view));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"loading NZD zone count from '%s' "
"for view '%s'",
view->new_zone_db, view->name);
CHECK(nzd_count(view, &n));
*num_zonesp = n;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"NZD database '%s' contains %d zones", view->new_zone_db,
n);
cleanup:
if (result != ISC_R_SUCCESS) {
*num_zonesp = 0;
}
return (ISC_R_SUCCESS);
}
#endif /* HAVE_LMDB */
static isc_result_t
setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
cfg_parser_t *conf_parser, cfg_aclconfctx_t *actx,
int *num_zones) {
isc_result_t result = ISC_R_SUCCESS;
bool allow = false;
ns_cfgctx_t *nzcfg = NULL;
const cfg_obj_t *maps[4];
const cfg_obj_t *options = NULL, *voptions = NULL;
const cfg_obj_t *nz = NULL;
const cfg_obj_t *nzdir = NULL;
const char *dir = NULL;
const cfg_obj_t *obj = NULL;
int i = 0;
uint64_t mapsize = 0ULL;
REQUIRE(config != NULL);
if (vconfig != NULL) {
voptions = cfg_tuple_get(vconfig, "options");
}
if (voptions != NULL) {
maps[i++] = voptions;
}
result = cfg_map_get(config, "options", &options);
if (result == ISC_R_SUCCESS) {
maps[i++] = options;
}
maps[i++] = named_g_defaults;
maps[i] = NULL;
result = named_config_get(maps, "allow-new-zones", &nz);
if (result == ISC_R_SUCCESS) {
allow = cfg_obj_asboolean(nz);
}
result = named_config_get(maps, "new-zones-directory", &nzdir);
if (result == ISC_R_SUCCESS) {
dir = cfg_obj_asstring(nzdir);
if (dir != NULL) {
result = isc_file_isdirectory(dir);
}
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, DNS_LOGCATEGORY_SECURITY,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"invalid new-zones-directory %s: %s", dir,
isc_result_totext(result));
return (result);
}
if (!isc_file_isdirwritable(dir)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"new-zones-directory '%s' "
"is not writable",
dir);
return (ISC_R_NOPERM);
}
dns_view_setnewzonedir(view, dir);
}
#ifdef HAVE_LMDB
result = named_config_get(maps, "lmdb-mapsize", &obj);
if (result == ISC_R_SUCCESS && obj != NULL) {
mapsize = cfg_obj_asuint64(obj);
if (mapsize < (1ULL << 20)) { /* 1 megabyte */
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"'lmdb-mapsize "
"%" PRId64 "' "
"is too small",
mapsize);
return (ISC_R_FAILURE);
} else if (mapsize > (1ULL << 40)) { /* 1 terabyte */
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"'lmdb-mapsize "
"%" PRId64 "' "
"is too large",
mapsize);
return (ISC_R_FAILURE);
}
}
#else /* ifdef HAVE_LMDB */
UNUSED(obj);
#endif /* HAVE_LMDB */
/*
* A non-empty catalog-zones statement implies allow-new-zones
*/
if (!allow) {
const cfg_obj_t *cz = NULL;
result = named_config_get(maps, "catalog-zones", &cz);
if (result == ISC_R_SUCCESS) {
const cfg_listelt_t *e =
cfg_list_first(cfg_tuple_get(cz, "zone list"));
if (e != NULL) {
allow = true;
}
}
}
if (!allow) {
dns_view_setnewzones(view, false, NULL, NULL, 0ULL);
if (num_zones != NULL) {
*num_zones = 0;
}
return (ISC_R_SUCCESS);
}
nzcfg = isc_mem_get(view->mctx, sizeof(*nzcfg));
/*
* We attach the parser that was used for config as well
* as the one that will be used for added zones, to avoid
* a shutdown race later.
*/
memset(nzcfg, 0, sizeof(*nzcfg));
cfg_parser_attach(conf_parser, &nzcfg->conf_parser);
cfg_parser_attach(named_g_addparser, &nzcfg->add_parser);
isc_mem_attach(view->mctx, &nzcfg->mctx);
cfg_aclconfctx_attach(actx, &nzcfg->actx);
result = dns_view_setnewzones(view, true, nzcfg, newzone_cfgctx_destroy,
mapsize);
if (result != ISC_R_SUCCESS) {
dns_view_setnewzones(view, false, NULL, NULL, 0ULL);
return (result);
}
cfg_obj_attach(config, &nzcfg->config);
if (vconfig != NULL) {
cfg_obj_attach(vconfig, &nzcfg->vconfig);
}
result = count_newzones(view, nzcfg, num_zones);
return (result);
}
static void
configure_zone_setviewcommit(isc_result_t result, const cfg_obj_t *zconfig,
dns_view_t *view) {
const char *zname;
dns_fixedname_t fixorigin;
dns_name_t *origin;
isc_result_t result2;
dns_view_t *pview = NULL;
dns_zone_t *zone = NULL;
dns_zone_t *raw = NULL;
zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
origin = dns_fixedname_initname(&fixorigin);
result2 = dns_name_fromstring(origin, zname, 0, NULL);
if (result2 != ISC_R_SUCCESS) {
return;
}
result2 = dns_viewlist_find(&named_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result2 != ISC_R_SUCCESS) {
return;
}
result2 = dns_view_findzone(pview, origin, &zone);
if (result2 != ISC_R_SUCCESS) {
dns_view_detach(&pview);
return;
}
dns_zone_getraw(zone, &raw);
if (result == ISC_R_SUCCESS) {
dns_zone_setviewcommit(zone);
if (raw != NULL) {
dns_zone_setviewcommit(raw);
}
} else {
dns_zone_setviewrevert(zone);
if (raw != NULL) {
dns_zone_setviewrevert(raw);
}
}
if (raw != NULL) {
dns_zone_detach(&raw);
}
dns_zone_detach(&zone);
dns_view_detach(&pview);
}
#ifndef HAVE_LMDB
static isc_result_t
configure_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
isc_mem_t *mctx, cfg_aclconfctx_t *actx) {
isc_result_t result;
ns_cfgctx_t *nzctx;
const cfg_obj_t *zonelist;
const cfg_listelt_t *element;
nzctx = view->new_zone_config;
if (nzctx == NULL || nzctx->nzf_config == NULL) {
return (ISC_R_SUCCESS);
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"loading additional zones for view '%s'", view->name);
zonelist = NULL;
cfg_map_get(nzctx->nzf_config, "zone", &zonelist);
for (element = cfg_list_first(zonelist); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *zconfig = cfg_listelt_value(element);
CHECK(configure_zone(config, zconfig, vconfig, mctx, view,
&named_g_server->viewlist,
&named_g_server->kasplist, actx, true,
false, false));
}
result = ISC_R_SUCCESS;
cleanup:
for (element = cfg_list_first(zonelist); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *zconfig = cfg_listelt_value(element);
configure_zone_setviewcommit(result, zconfig, view);
}
return (result);
}
#else /* HAVE_LMDB */
static isc_result_t
data_to_cfg(dns_view_t *view, MDB_val *key, MDB_val *data, isc_buffer_t **text,
cfg_obj_t **zoneconfig) {
isc_result_t result;
const char *zone_name;
size_t zone_name_len;
const char *zone_config;
size_t zone_config_len;
cfg_obj_t *zoneconf = NULL;
REQUIRE(view != NULL);
REQUIRE(key != NULL);
REQUIRE(data != NULL);
REQUIRE(text != NULL);
REQUIRE(zoneconfig != NULL && *zoneconfig == NULL);
if (*text == NULL) {
isc_buffer_allocate(view->mctx, text, 256);
} else {
isc_buffer_clear(*text);
}
zone_name = (const char *)key->mv_data;
zone_name_len = key->mv_size;
INSIST(zone_name != NULL && zone_name_len > 0);
zone_config = (const char *)data->mv_data;
zone_config_len = data->mv_size;
INSIST(zone_config != NULL && zone_config_len > 0);
/* zone zonename { config; }; */
result = isc_buffer_reserve(text, 5 + zone_name_len + 1 +
zone_config_len + 2);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
CHECK(putstr(text, "zone "));
CHECK(putmem(text, (const void *)zone_name, zone_name_len));
CHECK(putstr(text, " "));
CHECK(putmem(text, (const void *)zone_config, zone_config_len));
CHECK(putstr(text, ";\n"));
cfg_parser_reset(named_g_addparser);
result = cfg_parse_buffer(named_g_addparser, *text, zone_name, 0,
&cfg_type_addzoneconf, 0, &zoneconf);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"parsing config for zone '%.*s' in "
"NZD database '%s' failed",
(int)zone_name_len, zone_name, view->new_zone_db);
goto cleanup;
}
*zoneconfig = zoneconf;
zoneconf = NULL;
result = ISC_R_SUCCESS;
cleanup:
if (zoneconf != NULL) {
cfg_obj_destroy(named_g_addparser, &zoneconf);
}
return (result);
}
/*%
* Prototype for a callback which can be used with for_all_newzone_cfgs().
*/
typedef isc_result_t (*newzone_cfg_cb_t)(const cfg_obj_t *zconfig,
cfg_obj_t *config, cfg_obj_t *vconfig,
isc_mem_t *mctx, dns_view_t *view,
cfg_aclconfctx_t *actx);
/*%
* For each zone found in a NZD opened by the caller, create an object
* representing its configuration and invoke "callback" with the created
* object, "config", "vconfig", "mctx", "view" and "actx" as arguments (all
* these are non-global variables required to invoke configure_zone()).
* Immediately interrupt processing if an error is encountered while
* transforming NZD data into a zone configuration object or if "callback"
* returns an error.
*/
static isc_result_t
for_all_newzone_cfgs(newzone_cfg_cb_t callback, cfg_obj_t *config,
cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
cfg_aclconfctx_t *actx, MDB_txn *txn, MDB_dbi dbi) {
const cfg_obj_t *zconfig, *zlist;
isc_result_t result = ISC_R_SUCCESS;
cfg_obj_t *zconfigobj = NULL;
isc_buffer_t *text = NULL;
MDB_cursor *cursor = NULL;
MDB_val data, key;
int status;
status = mdb_cursor_open(txn, dbi, &cursor);
if (status != MDB_SUCCESS) {
return (ISC_R_FAILURE);
}
for (status = mdb_cursor_get(cursor, &key, &data, MDB_FIRST);
status == MDB_SUCCESS;
status = mdb_cursor_get(cursor, &key, &data, MDB_NEXT))
{
/*
* Create a configuration object from data fetched from NZD.
*/
result = data_to_cfg(view, &key, &data, &text, &zconfigobj);
if (result != ISC_R_SUCCESS) {
break;
}
/*
* Extract zone configuration from configuration object.
*/
zlist = NULL;
result = cfg_map_get(zconfigobj, "zone", &zlist);
if (result != ISC_R_SUCCESS) {
break;
} else if (!cfg_obj_islist(zlist)) {
result = ISC_R_FAILURE;
break;
}
zconfig = cfg_listelt_value(cfg_list_first(zlist));
/*
* Invoke callback.
*/
result = callback(zconfig, config, vconfig, mctx, view, actx);
if (result != ISC_R_SUCCESS) {
break;
}
/*
* Destroy the configuration object created in this iteration.
*/
cfg_obj_destroy(named_g_addparser, &zconfigobj);
}
if (text != NULL) {
isc_buffer_free(&text);
}
if (zconfigobj != NULL) {
cfg_obj_destroy(named_g_addparser, &zconfigobj);
}
mdb_cursor_close(cursor);
return (result);
}
/*%
* Attempt to configure a zone found in NZD and return the result.
*/
static isc_result_t
configure_newzone(const cfg_obj_t *zconfig, cfg_obj_t *config,
cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
cfg_aclconfctx_t *actx) {
return (configure_zone(
config, zconfig, vconfig, mctx, view, &named_g_server->viewlist,
&named_g_server->kasplist, actx, true, false, false));
}
/*%
* Revert new view assignment for a zone found in NZD.
*/
static isc_result_t
configure_newzone_revert(const cfg_obj_t *zconfig, cfg_obj_t *config,
cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
cfg_aclconfctx_t *actx) {
UNUSED(config);
UNUSED(vconfig);
UNUSED(mctx);
UNUSED(actx);
configure_zone_setviewcommit(ISC_R_FAILURE, zconfig, view);
return (ISC_R_SUCCESS);
}
static isc_result_t
configure_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
isc_mem_t *mctx, cfg_aclconfctx_t *actx) {
isc_result_t result;
MDB_txn *txn = NULL;
MDB_dbi dbi;
if (view->new_zone_config == NULL) {
return (ISC_R_SUCCESS);
}
result = nzd_open(view, MDB_RDONLY, &txn, &dbi);
if (result != ISC_R_SUCCESS) {
return (ISC_R_SUCCESS);
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"loading NZD configs from '%s' "
"for view '%s'",
view->new_zone_db, view->name);
result = for_all_newzone_cfgs(configure_newzone, config, vconfig, mctx,
view, actx, txn, dbi);
if (result != ISC_R_SUCCESS) {
/*
* An error was encountered while attempting to configure zones
* found in NZD. As this error may have been caused by a
* configure_zone() failure, try restoring a sane configuration
* by reattaching all zones found in NZD to the old view. If
* this also fails, too bad, there is nothing more we can do in
* terms of trying to make things right.
*/
(void)for_all_newzone_cfgs(configure_newzone_revert, config,
vconfig, mctx, view, actx, txn, dbi);
}
(void)nzd_close(&txn, false);
return (result);
}
static isc_result_t
get_newzone_config(dns_view_t *view, const char *zonename,
cfg_obj_t **zoneconfig) {
isc_result_t result;
int status;
cfg_obj_t *zoneconf = NULL;
isc_buffer_t *text = NULL;
MDB_txn *txn = NULL;
MDB_dbi dbi;
MDB_val key, data;
char zname[DNS_NAME_FORMATSIZE];
dns_fixedname_t fname;
dns_name_t *name;
isc_buffer_t b;
INSIST(zoneconfig != NULL && *zoneconfig == NULL);
CHECK(nzd_open(view, MDB_RDONLY, &txn, &dbi));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"loading NZD config from '%s' "
"for zone '%s'",
view->new_zone_db, zonename);
/* Normalize zone name */
isc_buffer_constinit(&b, zonename, strlen(zonename));
isc_buffer_add(&b, strlen(zonename));
name = dns_fixedname_initname(&fname);
CHECK(dns_name_fromtext(name, &b, dns_rootname, DNS_NAME_DOWNCASE,
NULL));
dns_name_format(name, zname, sizeof(zname));
key.mv_data = zname;
key.mv_size = strlen(zname);
status = mdb_get(txn, dbi, &key, &data);
if (status != MDB_SUCCESS) {
CHECK(ISC_R_FAILURE);
}
CHECK(data_to_cfg(view, &key, &data, &text, &zoneconf));
*zoneconfig = zoneconf;
zoneconf = NULL;
result = ISC_R_SUCCESS;
cleanup:
(void)nzd_close(&txn, false);
if (zoneconf != NULL) {
cfg_obj_destroy(named_g_addparser, &zoneconf);
}
if (text != NULL) {
isc_buffer_free(&text);
}
return (result);
}
#endif /* HAVE_LMDB */
static int
count_zones(const cfg_obj_t *conf) {
const cfg_obj_t *zonelist = NULL;
const cfg_listelt_t *element;
int n = 0;
REQUIRE(conf != NULL);
cfg_map_get(conf, "zone", &zonelist);
for (element = cfg_list_first(zonelist); element != NULL;
element = cfg_list_next(element))
{
n++;
}
return (n);
}
static isc_result_t
check_lockfile(named_server_t *server, const cfg_obj_t *config,
bool first_time) {
isc_result_t result;
const char *filename = NULL;
const cfg_obj_t *maps[3];
const cfg_obj_t *options;
const cfg_obj_t *obj;
int i;
i = 0;
options = NULL;
result = cfg_map_get(config, "options", &options);
if (result == ISC_R_SUCCESS) {
maps[i++] = options;
}
maps[i++] = named_g_defaults;
maps[i] = NULL;
obj = NULL;
(void)named_config_get(maps, "lock-file", &obj);
if (!first_time) {
if (obj != NULL && !cfg_obj_isstring(obj) &&
server->lockfile != NULL &&
strcmp(cfg_obj_asstring(obj), server->lockfile) != 0)
{
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"changing 'lock-file' "
"has no effect until the "
"server is restarted");
}
return (ISC_R_SUCCESS);
}
if (obj != NULL) {
if (cfg_obj_isvoid(obj)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
"skipping lock-file check ");
return (ISC_R_SUCCESS);
} else if (named_g_forcelock) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"'lock-file' has no effect "
"because the server was run with -X");
server->lockfile = isc_mem_strdup(
server->mctx, named_g_defaultlockfile);
} else {
filename = cfg_obj_asstring(obj);
server->lockfile = isc_mem_strdup(server->mctx,
filename);
}
if (server->lockfile == NULL) {
return (ISC_R_NOMEMORY);
}
}
if (named_g_forcelock && named_g_defaultlockfile != NULL) {
INSIST(server->lockfile == NULL);
server->lockfile = isc_mem_strdup(server->mctx,
named_g_defaultlockfile);
}
if (server->lockfile == NULL) {
return (ISC_R_SUCCESS);
}
if (named_os_issingleton(server->lockfile)) {
return (ISC_R_SUCCESS);
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"could not lock %s; another named "
"process may be running",
server->lockfile);
return (ISC_R_FAILURE);
}
static isc_result_t
load_configuration(const char *filename, named_server_t *server,
bool first_time) {
cfg_obj_t *config = NULL, *bindkeys = NULL;
cfg_parser_t *conf_parser = NULL, *bindkeys_parser = NULL;
const cfg_listelt_t *element;
const cfg_obj_t *builtin_views;
const cfg_obj_t *maps[3];
const cfg_obj_t *obj;
const cfg_obj_t *options;
const cfg_obj_t *usev4ports, *avoidv4ports, *usev6ports, *avoidv6ports;
const cfg_obj_t *kasps;
dns_kasp_t *kasp = NULL;
dns_kasp_t *kasp_next = NULL;
dns_kasplist_t tmpkasplist, kasplist;
const cfg_obj_t *views;
dns_view_t *view = NULL;
dns_view_t *view_next = NULL;
dns_viewlist_t tmpviewlist;
dns_viewlist_t viewlist, builtin_viewlist;
in_port_t listen_port, udpport_low, udpport_high;
int i, backlog;
int num_zones = 0;
bool exclusive = false;
isc_interval_t interval;
isc_logconfig_t *logc = NULL;
isc_portset_t *v4portset = NULL;
isc_portset_t *v6portset = NULL;
isc_resourcevalue_t nfiles;
isc_result_t result, tresult;
uint32_t heartbeat_interval;
uint32_t interface_interval;
uint32_t reserved;
uint32_t udpsize;
uint32_t transfer_message_size;
named_cache_t *nsc;
named_cachelist_t cachelist, tmpcachelist;
ns_altsecret_t *altsecret;
ns_altsecretlist_t altsecrets, tmpaltsecrets;
unsigned int maxsocks;
uint32_t softquota = 0;
uint32_t max;
unsigned int initial, idle, keepalive, advertised;
dns_aclenv_t *env =
ns_interfacemgr_getaclenv(named_g_server->interfacemgr);
ISC_LIST_INIT(kasplist);
ISC_LIST_INIT(viewlist);
ISC_LIST_INIT(builtin_viewlist);
ISC_LIST_INIT(cachelist);
ISC_LIST_INIT(altsecrets);
/* Create the ACL configuration context */
if (named_g_aclconfctx != NULL) {
cfg_aclconfctx_detach(&named_g_aclconfctx);
}
CHECK(cfg_aclconfctx_create(named_g_mctx, &named_g_aclconfctx));
/*
* Shut down all dyndb instances.
*/
dns_dyndb_cleanup(false);
/*
* Parse the global default pseudo-config file.
*/
if (first_time) {
result = named_config_parsedefaults(named_g_parser,
&named_g_config);
if (result != ISC_R_SUCCESS) {
named_main_earlyfatal("unable to load "
"internal defaults: %s",
isc_result_totext(result));
}
RUNTIME_CHECK(cfg_map_get(named_g_config, "options",
&named_g_defaults) == ISC_R_SUCCESS);
}
/*
* Parse the configuration file using the new config code.
*/
config = NULL;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"loading configuration from '%s'", filename);
CHECK(cfg_parser_create(named_g_mctx, named_g_lctx, &conf_parser));
cfg_parser_setcallback(conf_parser, directory_callback, NULL);
result = cfg_parse_file(conf_parser, filename, &cfg_type_namedconf,
&config);
CHECK(result);
/*
* Check the validity of the configuration.
*
* (Ignore plugin parameters for now; they will be
* checked later when the modules are actually loaded and
* registered.)
*/
CHECK(bind9_check_namedconf(config, false, named_g_lctx, named_g_mctx));
/*
* Fill in the maps array, used for resolving defaults.
*/
i = 0;
options = NULL;
result = cfg_map_get(config, "options", &options);
if (result == ISC_R_SUCCESS) {
maps[i++] = options;
}
maps[i++] = named_g_defaults;
maps[i] = NULL;
/*
* If bind.keys exists, load it. If "dnssec-validation auto"
* is turned on, the root key found there will be used as a
* default trust anchor.
*/
obj = NULL;
result = named_config_get(maps, "bindkeys-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->bindkeysfile, cfg_obj_asstring(obj)),
"strdup");
INSIST(server->bindkeysfile != NULL);
if (access(server->bindkeysfile, R_OK) == 0) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"reading built-in trust anchors "
"from file '%s'",
server->bindkeysfile);
CHECK(cfg_parser_create(named_g_mctx, named_g_lctx,
&bindkeys_parser));
result = cfg_parse_file(bindkeys_parser, server->bindkeysfile,
&cfg_type_bindkeys, &bindkeys);
CHECK(result);
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"unable to open '%s'; using built-in keys "
"instead",
server->bindkeysfile);
}
/* Ensure exclusive access to configuration data. */
if (!exclusive) {
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
exclusive = true;
}
/*
* Set process limits, which (usually) needs to be done as root.
*/
set_limits(maps);
/*
* Check the process lockfile.
*/
CHECK(check_lockfile(server, config, first_time));
/*
* Check if max number of open sockets that the system allows is
* sufficiently large. Failing this condition is not necessarily fatal,
* but may cause subsequent runtime failures for a busy recursive
* server.
*/
result = isc_socketmgr_getmaxsockets(named_g_socketmgr, &maxsocks);
if (result != ISC_R_SUCCESS) {
maxsocks = 0;
}
result = isc_resource_getcurlimit(isc_resource_openfiles, &nfiles);
if (result == ISC_R_SUCCESS && (isc_resourcevalue_t)maxsocks > nfiles) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"max open files (%" PRIu64 ")"
" is smaller than max sockets (%u)",
nfiles, maxsocks);
}
/*
* Set the number of socket reserved for TCP, stdio etc.
*/
obj = NULL;
result = named_config_get(maps, "reserved-sockets", &obj);
INSIST(result == ISC_R_SUCCESS);
reserved = cfg_obj_asuint32(obj);
if (maxsocks != 0) {
if (maxsocks < 128U) { /* Prevent underflow. */
reserved = 0;
} else if (reserved > maxsocks - 128U) { /* Minimum UDP space.
*/
reserved = maxsocks - 128;
}
}
/* Minimum TCP/stdio space. */
if (reserved < 128U) {
reserved = 128;
}
if (reserved + 128U > maxsocks && maxsocks != 0) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"less than 128 UDP sockets available after "
"applying 'reserved-sockets' and 'maxsockets'");
}
isc_socketmgr_setreserved(named_g_socketmgr, reserved);
#if defined(HAVE_GEOIP2)
/*
* Release any previously opened GeoIP2 databases.
*/
named_geoip_unload();
/*
* Initialize GeoIP databases from the configured location.
* This should happen before configuring any ACLs, so that we
* know what databases are available and can reject any GeoIP
* ACLs that can't work.
*/
obj = NULL;
result = named_config_get(maps, "geoip-directory", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isstring(obj)) {
char *dir;
DE_CONST(cfg_obj_asstring(obj), dir);
named_geoip_load(dir);
}
named_g_aclconfctx->geoip = named_g_geoip;
#endif /* HAVE_GEOIP2 */
/*
* Configure various server options.
*/
configure_server_quota(maps, "transfers-out",
&server->sctx->xfroutquota);
configure_server_quota(maps, "tcp-clients", &server->sctx->tcpquota);
configure_server_quota(maps, "recursive-clients",
&server->sctx->recursionquota);
max = isc_quota_getmax(&server->sctx->recursionquota);
if (max > 1000) {
unsigned margin = ISC_MAX(100, named_g_cpus + 1);
if (margin + 100 > max) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"'recursive-clients %d' too low when "
"running with %d worker threads",
max, named_g_cpus);
CHECK(ISC_R_RANGE);
}
softquota = max - margin;
} else {
softquota = (max * 90) / 100;
}
isc_quota_soft(&server->sctx->recursionquota, softquota);
/*
* Set "blackhole". Only legal at options level; there is
* no default.
*/
CHECK(configure_view_acl(NULL, config, NULL, "blackhole", NULL,
named_g_aclconfctx, named_g_mctx,
&server->sctx->blackholeacl));
if (server->sctx->blackholeacl != NULL) {
dns_dispatchmgr_setblackhole(named_g_dispatchmgr,
server->sctx->blackholeacl);
}
/*
* Set "keep-response-order". Only legal at options or
* global defaults level.
*/
CHECK(configure_view_acl(NULL, config, named_g_config,
"keep-response-order", NULL,
named_g_aclconfctx, named_g_mctx,
&server->sctx->keepresporder));
obj = NULL;
result = named_config_get(maps, "match-mapped-addresses", &obj);
INSIST(result == ISC_R_SUCCESS);
env->match_mapped = cfg_obj_asboolean(obj);
CHECKM(named_statschannels_configure(named_g_server, config,
named_g_aclconfctx),
"configuring statistics server(s)");
obj = NULL;
result = named_config_get(maps, "tcp-initial-timeout", &obj);
INSIST(result == ISC_R_SUCCESS);
initial = cfg_obj_asuint32(obj);
if (initial > 1200) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"tcp-initial-timeout value is out of range: "
"lowering to 1200");
initial = 1200;
} else if (initial < 25) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"tcp-initial-timeout value is out of range: "
"raising to 25");
initial = 25;
}
obj = NULL;
result = named_config_get(maps, "tcp-idle-timeout", &obj);
INSIST(result == ISC_R_SUCCESS);
idle = cfg_obj_asuint32(obj);
if (idle > 1200) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"tcp-idle-timeout value is out of range: "
"lowering to 1200");
idle = 1200;
} else if (idle < 1) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"tcp-idle-timeout value is out of range: "
"raising to 1");
idle = 1;
}
obj = NULL;
result = named_config_get(maps, "tcp-keepalive-timeout", &obj);
INSIST(result == ISC_R_SUCCESS);
keepalive = cfg_obj_asuint32(obj);
if (keepalive > MAX_TCP_TIMEOUT) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"tcp-keepalive-timeout value is out of range: "
"lowering to %u",
MAX_TCP_TIMEOUT);
keepalive = MAX_TCP_TIMEOUT;
} else if (keepalive < 1) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"tcp-keepalive-timeout value is out of range: "
"raising to 1");
keepalive = 1;
}
obj = NULL;
result = named_config_get(maps, "tcp-advertised-timeout", &obj);
INSIST(result == ISC_R_SUCCESS);
advertised = cfg_obj_asuint32(obj);
if (advertised > MAX_TCP_TIMEOUT) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_WARNING,
"tcp-advertized-timeout value is out of range: "
"lowering to %u",
MAX_TCP_TIMEOUT);
advertised = MAX_TCP_TIMEOUT;
}
isc_nm_tcp_settimeouts(named_g_nm, initial, idle, keepalive,
advertised);
/*
* Configure sets of UDP query source ports.
*/
CHECKM(isc_portset_create(named_g_mctx, &v4portset), "creating UDP "
"port set");
CHECKM(isc_portset_create(named_g_mctx, &v6portset), "creating UDP "
"port set");
usev4ports = NULL;
usev6ports = NULL;
avoidv4ports = NULL;
avoidv6ports = NULL;
(void)named_config_get(maps, "use-v4-udp-ports", &usev4ports);
if (usev4ports != NULL) {
portset_fromconf(v4portset, usev4ports, true);
} else {
CHECKM(isc_net_getudpportrange(AF_INET, &udpport_low,
&udpport_high),
"get the default UDP/IPv4 port range");
if (udpport_low == udpport_high) {
isc_portset_add(v4portset, udpport_low);
} else {
isc_portset_addrange(v4portset, udpport_low,
udpport_high);
}
if (!ns_server_getoption(server->sctx, NS_SERVER_DISABLE4)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"using default UDP/IPv4 port range: "
"[%d, %d]",
udpport_low, udpport_high);
}
}
(void)named_config_get(maps, "avoid-v4-udp-ports", &avoidv4ports);
if (avoidv4ports != NULL) {
portset_fromconf(v4portset, avoidv4ports, false);
}
(void)named_config_get(maps, "use-v6-udp-ports", &usev6ports);
if (usev6ports != NULL) {
portset_fromconf(v6portset, usev6ports, true);
} else {
CHECKM(isc_net_getudpportrange(AF_INET6, &udpport_low,
&udpport_high),
"get the default UDP/IPv6 port range");
if (udpport_low == udpport_high) {
isc_portset_add(v6portset, udpport_low);
} else {
isc_portset_addrange(v6portset, udpport_low,
udpport_high);
}
if (!ns_server_getoption(server->sctx, NS_SERVER_DISABLE6)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"using default UDP/IPv6 port range: "
"[%d, %d]",
udpport_low, udpport_high);
}
}
(void)named_config_get(maps, "avoid-v6-udp-ports", &avoidv6ports);
if (avoidv6ports != NULL) {
portset_fromconf(v6portset, avoidv6ports, false);
}
dns_dispatchmgr_setavailports(named_g_dispatchmgr, v4portset,
v6portset);
/*
* Set the EDNS UDP size when we don't match a view.
*/
obj = NULL;
result = named_config_get(maps, "edns-udp-size", &obj);
INSIST(result == ISC_R_SUCCESS);
udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512) {
udpsize = 512;
}
if (udpsize > 4096) {
udpsize = 4096;
}
server->sctx->udpsize = (uint16_t)udpsize;
/* Set the transfer message size for TCP */
obj = NULL;
result = named_config_get(maps, "transfer-message-size", &obj);
INSIST(result == ISC_R_SUCCESS);
transfer_message_size = cfg_obj_asuint32(obj);
if (transfer_message_size < 512) {
transfer_message_size = 512;
} else if (transfer_message_size > 65535) {
transfer_message_size = 65535;
}
server->sctx->transfer_tcp_message_size =
(uint16_t)transfer_message_size;
/*
* Configure the zone manager.
*/
obj = NULL;
result = named_config_get(maps, "transfers-in", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_settransfersin(server->zonemgr, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "transfers-per-ns", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_settransfersperns(server->zonemgr, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "notify-rate", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_setnotifyrate(server->zonemgr, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "startup-notify-rate", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_setstartupnotifyrate(server->zonemgr,
cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "serial-query-rate", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_setserialqueryrate(server->zonemgr, cfg_obj_asuint32(obj));
/*
* Determine which port to use for listening for incoming connections.
*/
if (named_g_port != 0) {
listen_port = named_g_port;
} else {
CHECKM(named_config_getport(config, &listen_port), "port");
}
/*
* Determining the default DSCP code point.
*/
CHECKM(named_config_getdscp(config, &named_g_dscp), "dscp");
/*
* Find the listen queue depth.
*/
obj = NULL;
result = named_config_get(maps, "tcp-listen-queue", &obj);
INSIST(result == ISC_R_SUCCESS);
backlog = cfg_obj_asuint32(obj);
if ((backlog > 0) && (backlog < 10)) {
backlog = 10;
}
ns_interfacemgr_setbacklog(server->interfacemgr, backlog);
/*
* Configure the interface manager according to the "listen-on"
* statement.
*/
{
const cfg_obj_t *clistenon = NULL;
ns_listenlist_t *listenon = NULL;
clistenon = NULL;
/*
* Even though listen-on is present in the default
* configuration, this way is easier.
*/
if (options != NULL) {
(void)cfg_map_get(options, "listen-on", &clistenon);
}
if (clistenon != NULL) {
/* check return code? */
(void)ns_listenlist_fromconfig(
clistenon, config, named_g_aclconfctx,
named_g_mctx, AF_INET, &listenon);
} else {
/*
* Not specified, use default.
*/
CHECK(ns_listenlist_default(named_g_mctx, listen_port,
-1, true, &listenon));
}
if (listenon != NULL) {
ns_interfacemgr_setlistenon4(server->interfacemgr,
listenon);
ns_listenlist_detach(&listenon);
}
}
/*
* Ditto for IPv6.
*/
{
const cfg_obj_t *clistenon = NULL;
ns_listenlist_t *listenon = NULL;
if (options != NULL) {
(void)cfg_map_get(options, "listen-on-v6", &clistenon);
}
if (clistenon != NULL) {
/* check return code? */
(void)ns_listenlist_fromconfig(
clistenon, config, named_g_aclconfctx,
named_g_mctx, AF_INET6, &listenon);
} else {
/*
* Not specified, use default.
*/
CHECK(ns_listenlist_default(named_g_mctx, listen_port,
-1, true, &listenon));
}
if (listenon != NULL) {
ns_interfacemgr_setlistenon6(server->interfacemgr,
listenon);
ns_listenlist_detach(&listenon);
}
}
/*
* Rescan the interface list to pick up changes in the
* listen-on option. It's important that we do this before we try
* to configure the query source, since the dispatcher we use might
* be shared with an interface.
*/
result = ns_interfacemgr_scan(server->interfacemgr, true);
/*
* Check that named is able to TCP listen on at least one
* interface. Otherwise, another named process could be running
* and we should fail.
*/
if (first_time && (result == ISC_R_ADDRINUSE)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"unable to listen on any configured interfaces");
result = ISC_R_FAILURE;
goto cleanup;
}
/*
* Arrange for further interface scanning to occur periodically
* as specified by the "interface-interval" option.
*/
obj = NULL;
result = named_config_get(maps, "interface-interval", &obj);
INSIST(result == ISC_R_SUCCESS);
interface_interval = cfg_obj_asduration(obj);
if (interface_interval == 0) {
CHECK(isc_timer_reset(server->interface_timer,
isc_timertype_inactive, NULL, NULL,
true));
} else if (server->interface_interval != interface_interval) {
isc_interval_set(&interval, interface_interval, 0);
CHECK(isc_timer_reset(server->interface_timer,
isc_timertype_ticker, NULL, &interval,
false));
}
server->interface_interval = interface_interval;
/*
* Enable automatic interface scans.
*/
obj = NULL;
result = named_config_get(maps, "automatic-interface-scan", &obj);
INSIST(result == ISC_R_SUCCESS);
server->sctx->interface_auto = cfg_obj_asboolean(obj);
/*
* Configure the dialup heartbeat timer.
*/
obj = NULL;
result = named_config_get(maps, "heartbeat-interval", &obj);
INSIST(result == ISC_R_SUCCESS);
heartbeat_interval = cfg_obj_asuint32(obj) * 60;
if (heartbeat_interval == 0) {
CHECK(isc_timer_reset(server->heartbeat_timer,
isc_timertype_inactive, NULL, NULL,
true));
} else if (server->heartbeat_interval != heartbeat_interval) {
isc_interval_set(&interval, heartbeat_interval, 0);
CHECK(isc_timer_reset(server->heartbeat_timer,
isc_timertype_ticker, NULL, &interval,
false));
}
server->heartbeat_interval = heartbeat_interval;
isc_interval_set(&interval, 1200, 0);
CHECK(isc_timer_reset(server->pps_timer, isc_timertype_ticker, NULL,
&interval, false));
isc_interval_set(&interval, named_g_tat_interval, 0);
CHECK(isc_timer_reset(server->tat_timer, isc_timertype_ticker, NULL,
&interval, false));
/*
* Write the PID file.
*/
obj = NULL;
if (named_config_get(maps, "pid-file", &obj) == ISC_R_SUCCESS) {
if (cfg_obj_isvoid(obj)) {
named_os_writepidfile(NULL, first_time);
} else {
named_os_writepidfile(cfg_obj_asstring(obj),
first_time);
}
} else {
named_os_writepidfile(named_g_defaultpidfile, first_time);
}
/*
* Configure the server-wide session key. This must be done before
* configure views because zone configuration may need to know
* session-keyname.
*
* Failure of session key generation isn't fatal at this time; if it
* turns out that a session key is really needed but doesn't exist,
* we'll treat it as a fatal error then.
*/
(void)configure_session_key(maps, server, named_g_mctx);
/*
* Create the DNSSEC key and signing policies (KASP).
*/
kasps = NULL;
(void)cfg_map_get(config, "dnssec-policy", &kasps);
for (element = cfg_list_first(kasps); element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *kconfig = cfg_listelt_value(element);
kasp = NULL;
CHECK(cfg_kasp_fromconfig(kconfig, named_g_mctx, named_g_lctx,
&kasplist, &kasp));
INSIST(kasp != NULL);
dns_kasp_freeze(kasp);
dns_kasp_detach(&kasp);
}
/*
* Create the default kasp.
*/
kasp = NULL;
CHECK(cfg_kasp_fromconfig(NULL, named_g_mctx, named_g_lctx, &kasplist,
&kasp));
INSIST(kasp != NULL);
dns_kasp_freeze(kasp);
dns_kasp_detach(&kasp);
tmpkasplist = server->kasplist;
server->kasplist = kasplist;
kasplist = tmpkasplist;
/*
* Configure the views.
*/
views = NULL;
(void)cfg_map_get(config, "view", &views);
/*
* Create the views and count all the configured zones in
* order to correctly size the zone manager's task table.
* (We only count zones for configured views; the built-in
* "bind" view can be ignored as it only adds a negligible
* number of zones.)
*
* If we're allowing new zones, we need to be able to find the
* new zone file and count those as well. So we setup the new
* zone configuration context, but otherwise view configuration
* waits until after the zone manager's task list has been sized.
*/
for (element = cfg_list_first(views); element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *vconfig = cfg_listelt_value(element);
const cfg_obj_t *voptions = cfg_tuple_get(vconfig, "options");
int nzf_num_zones;
view = NULL;
CHECK(create_view(vconfig, &viewlist, &view));
INSIST(view != NULL);
num_zones += count_zones(voptions);
CHECK(setup_newzones(view, config, vconfig, conf_parser,
named_g_aclconfctx, &nzf_num_zones));
num_zones += nzf_num_zones;
dns_view_detach(&view);
}
/*
* If there were no explicit views then we do the default
* view here.
*/
if (views == NULL) {
int nzf_num_zones;
CHECK(create_view(NULL, &viewlist, &view));
INSIST(view != NULL);
num_zones = count_zones(config);
CHECK(setup_newzones(view, config, NULL, conf_parser,
named_g_aclconfctx, &nzf_num_zones));
num_zones += nzf_num_zones;
dns_view_detach(&view);
}
/*
* Zones have been counted; set the zone manager task pool size.
*/
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"sizing zone task pool based on %d zones", num_zones);
CHECK(dns_zonemgr_setsize(named_g_server->zonemgr, num_zones));
/*
* Configure and freeze all explicit views. Explicit
* views that have zones were already created at parsing
* time, but views with no zones must be created here.
*/
for (element = cfg_list_first(views); element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *vconfig = cfg_listelt_value(element);
view = NULL;
CHECK(find_view(vconfig, &viewlist, &view));
CHECK(configure_view(view, &viewlist, config, vconfig,
&cachelist, &server->kasplist, bindkeys,
named_g_mctx, named_g_aclconfctx, true));
dns_view_freeze(view);
dns_view_detach(&view);
}
/*
* Make sure we have a default view if and only if there
* were no explicit views.
*/
if (views == NULL) {
view = NULL;
CHECK(find_view(NULL, &viewlist, &view));
CHECK(configure_view(view, &viewlist, config, NULL, &cachelist,
&server->kasplist, bindkeys, named_g_mctx,
named_g_aclconfctx, true));
dns_view_freeze(view);
dns_view_detach(&view);
}
/*
* Create (or recreate) the built-in views.
*/
builtin_views = NULL;
RUNTIME_CHECK(cfg_map_get(named_g_config, "view", &builtin_views) ==
ISC_R_SUCCESS);
for (element = cfg_list_first(builtin_views); element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *vconfig = cfg_listelt_value(element);
CHECK(create_view(vconfig, &builtin_viewlist, &view));
CHECK(configure_view(view, &viewlist, config, vconfig,
&cachelist, &server->kasplist, bindkeys,
named_g_mctx, named_g_aclconfctx, false));
dns_view_freeze(view);
dns_view_detach(&view);
view = NULL;
}
/* Now combine the two viewlists into one */
ISC_LIST_APPENDLIST(viewlist, builtin_viewlist, link);
/*
* Commit any dns_zone_setview() calls on all zones in the new
* view.
*/
for (view = ISC_LIST_HEAD(viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
dns_view_setviewcommit(view);
}
/* Swap our new view list with the production one. */
tmpviewlist = server->viewlist;
server->viewlist = viewlist;
viewlist = tmpviewlist;
/* Make the view list available to each of the views */
view = ISC_LIST_HEAD(server->viewlist);
while (view != NULL) {
view->viewlist = &server->viewlist;
view = ISC_LIST_NEXT(view, link);
}
/* Swap our new cache list with the production one. */
tmpcachelist = server->cachelist;
server->cachelist = cachelist;
cachelist = tmpcachelist;
/* Load the TKEY information from the configuration. */
if (options != NULL) {
dns_tkeyctx_t *t = NULL;
CHECKM(named_tkeyctx_fromconfig(options, named_g_mctx, &t),
"configuring TKEY");
if (server->sctx->tkeyctx != NULL) {
dns_tkeyctx_destroy(&server->sctx->tkeyctx);
}
server->sctx->tkeyctx = t;
}
/*
* Bind the control port(s).
*/
CHECKM(named_controls_configure(named_g_server->controls, config,
named_g_aclconfctx),
"binding control channel(s)");
#ifdef HAVE_LMDB
/*
* If we're using LMDB, we may have created newzones databases
* as root, making it impossible to reopen them later after
* switching to a new userid. We close them now, and reopen
* after relinquishing privileges them.
*/
if (first_time) {
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
nzd_env_close(view);
}
}
#endif /* HAVE_LMDB */
/*
* Relinquish root privileges.
*/
if (first_time) {
named_os_changeuser();
}
/*
* Check that the working directory is writable.
*/
if (!isc_file_isdirwritable(".")) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"the working directory is not writable");
result = ISC_R_NOPERM;
goto cleanup;
}
#ifdef HAVE_LMDB
/*
* Reopen NZD databases.
*/
if (first_time) {
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
nzd_env_reopen(view);
}
}
#endif /* HAVE_LMDB */
/*
* Configure the logging system.
*
* Do this after changing UID to make sure that any log
* files specified in named.conf get created by the
* unprivileged user, not root.
*/
if (named_g_logstderr) {
const cfg_obj_t *logobj = NULL;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"not using config file logging "
"statement for logging due to "
"-g option");
(void)cfg_map_get(config, "logging", &logobj);
if (logobj != NULL) {
result = named_logconfig(NULL, logobj);
if (result != ISC_R_SUCCESS) {
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"checking logging configuration "
"failed: %s",
isc_result_totext(result));
goto cleanup;
}
}
} else {
const cfg_obj_t *logobj = NULL;
CHECKM(isc_logconfig_create(named_g_lctx, &logc),
"creating new logging configuration");
logobj = NULL;
(void)cfg_map_get(config, "logging", &logobj);
if (logobj != NULL) {
CHECKM(named_logconfig(logc, logobj), "configuring "
"logging");
} else {
CHECKM(named_log_setdefaultchannels(logc),
"setting up default logging channels");
CHECKM(named_log_setunmatchedcategory(logc),
"setting up default 'category unmatched'");
CHECKM(named_log_setdefaultcategory(logc),
"setting up default 'category default'");
}
CHECKM(isc_logconfig_use(named_g_lctx, logc),
"installing logging configuration");
logc = NULL;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
"now using logging configuration from "
"config file");
}
/*
* Set the default value of the query logging flag depending
* whether a "queries" category has been defined. This is
* a disgusting hack, but we need to do this for BIND 8
* compatibility.
*/
if (first_time) {
const cfg_obj_t *logobj = NULL;
const cfg_obj_t *categories = NULL;
obj = NULL;
if (named_config_get(maps, "querylog", &obj) == ISC_R_SUCCESS) {
ns_server_setoption(server->sctx, NS_SERVER_LOGQUERIES,
cfg_obj_asboolean(obj));
} else {
(void)cfg_map_get(config, "logging", &logobj);
if (logobj != NULL) {
(void)cfg_map_get(logobj, "category",
&categories);
}
if (categories != NULL) {
for (element = cfg_list_first(categories);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *catobj;
const char *str;
obj = cfg_listelt_value(element);
catobj = cfg_tuple_get(obj, "name");
str = cfg_obj_asstring(catobj);
if (strcasecmp(str, "queries") == 0) {
ns_server_setoption(
server->sctx,
NS_SERVER_LOGQUERIES,
true);
}
}
}
}
}
obj = NULL;
if (options != NULL &&
cfg_map_get(options, "memstatistics", &obj) == ISC_R_SUCCESS)
{
named_g_memstatistics = cfg_obj_asboolean(obj);
} else {
named_g_memstatistics =
((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0);
}
obj = NULL;
if (named_config_get(maps, "memstatistics-file", &obj) == ISC_R_SUCCESS)
{
named_main_setmemstats(cfg_obj_asstring(obj));
} else if (named_g_memstatistics) {
named_main_setmemstats("named.memstats");
} else {
named_main_setmemstats(NULL);
}
obj = NULL;
result = named_config_get(maps, "statistics-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->statsfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = named_config_get(maps, "dump-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->dumpfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = named_config_get(maps, "secroots-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->secrootsfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = named_config_get(maps, "recursing-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->recfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = named_config_get(maps, "version", &obj);
if (result == ISC_R_SUCCESS) {
CHECKM(setoptstring(server, &server->version, obj), "strdup");
server->version_set = true;
} else {
server->version_set = false;
}
obj = NULL;
result = named_config_get(maps, "hostname", &obj);
if (result == ISC_R_SUCCESS) {
CHECKM(setoptstring(server, &server->hostname, obj), "strdup");
server->hostname_set = true;
} else {
server->hostname_set = false;
}
obj = NULL;
result = named_config_get(maps, "server-id", &obj);
server->sctx->gethostname = NULL;
if (result == ISC_R_SUCCESS && cfg_obj_isboolean(obj)) {
/* The parser translates "hostname" to true */
server->sctx->gethostname = named_os_gethostname;
result = ns_server_setserverid(server->sctx, NULL);
} else if (result == ISC_R_SUCCESS && !cfg_obj_isvoid(obj)) {
/* Found a quoted string */
result = ns_server_setserverid(server->sctx,
cfg_obj_asstring(obj));
} else {
result = ns_server_setserverid(server->sctx, NULL);
}
RUNTIME_CHECK(result == ISC_R_SUCCESS);
obj = NULL;
result = named_config_get(maps, "flush-zones-on-shutdown", &obj);
if (result == ISC_R_SUCCESS) {
server->flushonshutdown = cfg_obj_asboolean(obj);
} else {
server->flushonshutdown = false;
}
obj = NULL;
result = named_config_get(maps, "answer-cookie", &obj);
INSIST(result == ISC_R_SUCCESS);
server->sctx->answercookie = cfg_obj_asboolean(obj);
obj = NULL;
result = named_config_get(maps, "cookie-algorithm", &obj);
INSIST(result == ISC_R_SUCCESS);
if (strcasecmp(cfg_obj_asstring(obj), "siphash24") == 0) {
server->sctx->cookiealg = ns_cookiealg_siphash24;
} else if (strcasecmp(cfg_obj_asstring(obj), "aes") == 0) {
server->sctx->cookiealg = ns_cookiealg_aes;
} else {
INSIST(0);
ISC_UNREACHABLE();
}
obj = NULL;
result = named_config_get(maps, "cookie-secret", &obj);
if (result == ISC_R_SUCCESS) {
const char *str;
bool first = true;
isc_buffer_t b;
unsigned int usedlength;
unsigned int expectedlength;
for (element = cfg_list_first(obj); element != NULL;
element = cfg_list_next(element))
{
obj = cfg_listelt_value(element);
str = cfg_obj_asstring(obj);
if (first) {
memset(server->sctx->secret, 0,
sizeof(server->sctx->secret));
isc_buffer_init(&b, server->sctx->secret,
sizeof(server->sctx->secret));
result = isc_hex_decodestring(str, &b);
if (result != ISC_R_SUCCESS &&
result != ISC_R_NOSPACE) {
goto cleanup;
}
first = false;
} else {
altsecret = isc_mem_get(server->sctx->mctx,
sizeof(*altsecret));
isc_buffer_init(&b, altsecret->secret,
sizeof(altsecret->secret));
result = isc_hex_decodestring(str, &b);
if (result != ISC_R_SUCCESS &&
result != ISC_R_NOSPACE) {
isc_mem_put(server->sctx->mctx,
altsecret,
sizeof(*altsecret));
goto cleanup;
}
ISC_LIST_INITANDAPPEND(altsecrets, altsecret,
link);
}
usedlength = isc_buffer_usedlength(&b);
switch (server->sctx->cookiealg) {
case ns_cookiealg_siphash24:
expectedlength = ISC_SIPHASH24_KEY_LENGTH;
if (usedlength != expectedlength) {
CHECKM(ISC_R_RANGE, "SipHash-2-4 "
"cookie-secret "
"must be 128 bits");
}
break;
case ns_cookiealg_aes:
expectedlength = ISC_AES128_KEYLENGTH;
if (usedlength != expectedlength) {
CHECKM(ISC_R_RANGE, "AES cookie-secret "
"must be 128 bits");
}
break;
}
}
} else {
isc_nonce_buf(server->sctx->secret,
sizeof(server->sctx->secret));
}
/*
* Swap altsecrets lists.
*/
tmpaltsecrets = server->sctx->altsecrets;
server->sctx->altsecrets = altsecrets;
altsecrets = tmpaltsecrets;
(void)named_server_loadnta(server);
#ifdef USE_DNSRPS
/*
* Start and connect to the DNS Response Policy Service
* daemon, dnsrpzd, for each view that uses DNSRPS.
*/
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
result = dns_dnsrps_connect(view->rpzs);
if (result != ISC_R_SUCCESS) {
view = NULL;
goto cleanup;
}
}
#endif /* ifdef USE_DNSRPS */
result = ISC_R_SUCCESS;
cleanup:
if (logc != NULL) {
isc_logconfig_destroy(&logc);
}
if (v4portset != NULL) {
isc_portset_destroy(named_g_mctx, &v4portset);
}
if (v6portset != NULL) {
isc_portset_destroy(named_g_mctx, &v6portset);
}
if (conf_parser != NULL) {
if (config != NULL) {
cfg_obj_destroy(conf_parser, &config);
}
cfg_parser_destroy(&conf_parser);
}
if (bindkeys_parser != NULL) {
if (bindkeys != NULL) {
cfg_obj_destroy(bindkeys_parser, &bindkeys);
}
cfg_parser_destroy(&bindkeys_parser);
}
if (view != NULL) {
dns_view_detach(&view);
}
if (kasp != NULL) {
dns_kasp_detach(&kasp);
}
ISC_LIST_APPENDLIST(viewlist, builtin_viewlist, link);
/*
* This cleans up either the old production view list
* or our temporary list depending on whether they
* were swapped above or not.
*/
for (view = ISC_LIST_HEAD(viewlist); view != NULL; view = view_next) {
view_next = ISC_LIST_NEXT(view, link);
ISC_LIST_UNLINK(viewlist, view, link);
if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") != 0)
{
dns_view_setviewrevert(view);
(void)dns_zt_apply(view->zonetable, false, NULL,
removed, view);
}
dns_view_detach(&view);
}
/*
* Same cleanup for kasp list.
*/
for (kasp = ISC_LIST_HEAD(kasplist); kasp != NULL; kasp = kasp_next) {
kasp_next = ISC_LIST_NEXT(kasp, link);
ISC_LIST_UNLINK(kasplist, kasp, link);
dns_kasp_detach(&kasp);
}
/* Same cleanup for cache list. */
while ((nsc = ISC_LIST_HEAD(cachelist)) != NULL) {
ISC_LIST_UNLINK(cachelist, nsc, link);
dns_cache_detach(&nsc->cache);
isc_mem_put(server->mctx, nsc, sizeof(*nsc));
}
/* Cleanup for altsecrets list. */
while ((altsecret = ISC_LIST_HEAD(altsecrets)) != NULL) {
ISC_LIST_UNLINK(altsecrets, altsecret, link);
isc_mem_put(server->sctx->mctx, altsecret, sizeof(*altsecret));
}
/*
* Adjust the listening interfaces in accordance with the source
* addresses specified in views and zones.
*/
if (isc_net_probeipv6() == ISC_R_SUCCESS) {
adjust_interfaces(server, named_g_mctx);
}
/*
* Record the time of most recent configuration
*/
tresult = isc_time_now(&named_g_configtime);
if (tresult != ISC_R_SUCCESS) {
named_main_earlyfatal("isc_time_now() failed: %s",
isc_result_totext(result));
}
/* Relinquish exclusive access to configuration data. */
if (exclusive) {
isc_task_endexclusive(server->task);
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
"load_configuration: %s", isc_result_totext(result));
return (result);
}
static isc_result_t
view_loaded(void *arg) {
isc_result_t result;
ns_zoneload_t *zl = (ns_zoneload_t *)arg;
named_server_t *server = zl->server;
bool reconfig = zl->reconfig;
/*
* Force zone maintenance. Do this after loading
* so that we know when we need to force AXFR of
* slave zones whose master files are missing.
*
* We use the zoneload reference counter to let us
* know when all views are finished.
*/
if (isc_refcount_decrement(&zl->refs) == 1) {
isc_refcount_destroy(&zl->refs);
isc_mem_put(server->mctx, zl, sizeof(*zl));
/*
* To maintain compatibility with log parsing tools that might
* be looking for this string after "rndc reconfig", we keep it
* as it is
*/
if (reconfig) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"any newly configured zones are now "
"loaded");
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_NOTICE,
"all zones loaded");
}
CHECKFATAL(dns_zonemgr_forcemaint(server->zonemgr),
"forcing zone maintenance");
named_os_started();
#ifdef HAVE_FIPS_MODE
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_NOTICE,
"FIPS mode is %s",
FIPS_mode() ? "enabled" : "disabled");
#endif /* ifdef HAVE_FIPS_MODE */
server->reload_status = NAMED_RELOAD_DONE;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_NOTICE,
"running");
}
return (ISC_R_SUCCESS);
}
static isc_result_t
load_zones(named_server_t *server, bool init, bool reconfig) {
isc_result_t result;
dns_view_t *view;
ns_zoneload_t *zl;
zl = isc_mem_get(server->mctx, sizeof(*zl));
zl->server = server;
zl->reconfig = reconfig;
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
isc_refcount_init(&zl->refs, 1);
/*
* Schedule zones to be loaded from disk.
*/
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (view->managed_keys != NULL) {
result = dns_zone_load(view->managed_keys, false);
if (result != ISC_R_SUCCESS &&
result != DNS_R_UPTODATE &&
result != DNS_R_CONTINUE)
{
goto cleanup;
}
}
if (view->redirect != NULL) {
result = dns_zone_load(view->redirect, false);
if (result != ISC_R_SUCCESS &&
result != DNS_R_UPTODATE &&
result != DNS_R_CONTINUE)
{
goto cleanup;
}
}
/*
* 'dns_view_asyncload' calls view_loaded if there are no
* zones.
*/
isc_refcount_increment(&zl->refs);
result = dns_view_asyncload(view, reconfig, view_loaded, zl);
if (result != ISC_R_SUCCESS) {
(void)isc_refcount_decrement(&zl->refs);
goto cleanup;
}
}
cleanup:
if (isc_refcount_decrement(&zl->refs) == 1) {
isc_refcount_destroy(&zl->refs);
isc_mem_put(server->mctx, zl, sizeof(*zl));
} else if (init) {
/*
* Place the task manager into privileged mode. This
* ensures that after we leave task-exclusive mode, no
* other tasks will be able to run except for the ones
* that are loading zones. (This should only be done during
* the initial server setup; it isn't necessary during
* a reload.)
*/
isc_taskmgr_setprivilegedmode(named_g_taskmgr);
}
isc_task_endexclusive(server->task);
return (result);
}
static void
run_server(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
named_server_t *server = (named_server_t *)event->ev_arg;
dns_geoip_databases_t *geoip;
INSIST(task == server->task);
isc_event_free(&event);
CHECKFATAL(dns_dispatchmgr_create(named_g_mctx, &named_g_dispatchmgr),
"creating dispatch manager");
dns_dispatchmgr_setstats(named_g_dispatchmgr, server->resolverstats);
#if defined(HAVE_GEOIP2)
geoip = named_g_geoip;
#else /* if defined(HAVE_GEOIP2) */
geoip = NULL;
#endif /* if defined(HAVE_GEOIP2) */
CHECKFATAL(ns_interfacemgr_create(
named_g_mctx, server->sctx, named_g_taskmgr,
named_g_timermgr, named_g_socketmgr, named_g_nm,
named_g_dispatchmgr, server->task, named_g_udpdisp,
geoip, named_g_cpus, &server->interfacemgr),
"creating interface manager");
CHECKFATAL(isc_timer_create(named_g_timermgr, isc_timertype_inactive,
NULL, NULL, server->task,
interface_timer_tick, server,
&server->interface_timer),
"creating interface timer");
CHECKFATAL(isc_timer_create(named_g_timermgr, isc_timertype_inactive,
NULL, NULL, server->task,
heartbeat_timer_tick, server,
&server->heartbeat_timer),
"creating heartbeat timer");
CHECKFATAL(isc_timer_create(named_g_timermgr, isc_timertype_inactive,
NULL, NULL, server->task, tat_timer_tick,
server, &server->tat_timer),
"creating trust anchor telemetry timer");
CHECKFATAL(isc_timer_create(named_g_timermgr, isc_timertype_inactive,
NULL, NULL, server->task, pps_timer_tick,
server, &server->pps_timer),
"creating pps timer");
CHECKFATAL(
cfg_parser_create(named_g_mctx, named_g_lctx, &named_g_parser),
"creating default configuration parser");
CHECKFATAL(cfg_parser_create(named_g_mctx, named_g_lctx,
&named_g_addparser),
"creating additional configuration parser");
CHECKFATAL(load_configuration(named_g_conffile, server, true),
"loading configuration");
CHECKFATAL(load_zones(server, true, false), "loading zones");
#ifdef ENABLE_AFL
named_g_run_done = true;
#endif /* ifdef ENABLE_AFL */
}
void
named_server_flushonshutdown(named_server_t *server, bool flush) {
REQUIRE(NAMED_SERVER_VALID(server));
server->flushonshutdown = flush;
}
static void
shutdown_server(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
dns_view_t *view, *view_next = NULL;
dns_kasp_t *kasp, *kasp_next = NULL;
named_server_t *server = (named_server_t *)event->ev_arg;
bool flush = server->flushonshutdown;
named_cache_t *nsc;
UNUSED(task);
INSIST(task == server->task);
/*
* We need to shutdown the interface before going
* exclusive (which would pause the netmgr).
*/
ns_interfacemgr_shutdown(server->interfacemgr);
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO, "shutting down%s",
flush ? ": flushing changes" : "");
named_statschannels_shutdown(server);
named_controls_shutdown(server->controls);
end_reserved_dispatches(server, true);
cleanup_session_key(server, server->mctx);
if (named_g_aclconfctx != NULL) {
cfg_aclconfctx_detach(&named_g_aclconfctx);
}
cfg_obj_destroy(named_g_parser, &named_g_config);
cfg_parser_destroy(&named_g_parser);
cfg_parser_destroy(&named_g_addparser);
(void)named_server_saventa(server);
for (kasp = ISC_LIST_HEAD(server->kasplist); kasp != NULL;
kasp = kasp_next) {
kasp_next = ISC_LIST_NEXT(kasp, link);
ISC_LIST_UNLINK(server->kasplist, kasp, link);
dns_kasp_detach(&kasp);
}
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = view_next) {
view_next = ISC_LIST_NEXT(view, link);
ISC_LIST_UNLINK(server->viewlist, view, link);
if (flush) {
dns_view_flushanddetach(&view);
} else {
dns_view_detach(&view);
}
}
/*
* Shut down all dyndb instances.
*/
dns_dyndb_cleanup(true);
while ((nsc = ISC_LIST_HEAD(server->cachelist)) != NULL) {
ISC_LIST_UNLINK(server->cachelist, nsc, link);
dns_cache_detach(&nsc->cache);
isc_mem_put(server->mctx, nsc, sizeof(*nsc));
}
isc_timer_detach(&server->interface_timer);
isc_timer_detach(&server->heartbeat_timer);
isc_timer_detach(&server->pps_timer);
isc_timer_detach(&server->tat_timer);
ns_interfacemgr_detach(&server->interfacemgr);
dns_dispatchmgr_destroy(&named_g_dispatchmgr);
dns_zonemgr_shutdown(server->zonemgr);
if (named_g_sessionkey != NULL) {
dns_tsigkey_detach(&named_g_sessionkey);
dns_name_free(&named_g_sessionkeyname, server->mctx);
}
#if defined(HAVE_GEOIP2)
named_geoip_shutdown();
#endif /* HAVE_GEOIP2 */
dns_db_detach(&server->in_roothints);
isc_task_endexclusive(server->task);
isc_task_detach(&server->task);
isc_event_free(&event);
}
/*%
* Find a view that matches the source and destination addresses of a query.
*/
static isc_result_t
get_matching_view(isc_netaddr_t *srcaddr, isc_netaddr_t *destaddr,
dns_message_t *message, dns_aclenv_t *env,
isc_result_t *sigresult, dns_view_t **viewp) {
dns_view_t *view;
REQUIRE(message != NULL);
REQUIRE(sigresult != NULL);
REQUIRE(viewp != NULL && *viewp == NULL);
for (view = ISC_LIST_HEAD(named_g_server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (message->rdclass == view->rdclass ||
message->rdclass == dns_rdataclass_any) {
const dns_name_t *tsig = NULL;
*sigresult = dns_message_rechecksig(message, view);
if (*sigresult == ISC_R_SUCCESS) {
dns_tsigkey_t *tsigkey;
tsigkey = message->tsigkey;
tsig = dns_tsigkey_identity(tsigkey);
}
if (dns_acl_allowed(srcaddr, tsig, view->matchclients,
env) &&
dns_acl_allowed(destaddr, tsig,
view->matchdestinations, env) &&
!(view->matchrecursiveonly &&
(message->flags & DNS_MESSAGEFLAG_RD) == 0))
{
dns_view_attach(view, viewp);
return (ISC_R_SUCCESS);
}
}
}
return (ISC_R_NOTFOUND);
}
void
named_server_create(isc_mem_t *mctx, named_server_t **serverp) {
isc_result_t result;
named_server_t *server = isc_mem_get(mctx, sizeof(*server));
if (server == NULL) {
fatal(server, "allocating server object", ISC_R_NOMEMORY);
}
server->mctx = mctx;
server->task = NULL;
server->zonemgr = NULL;
#ifdef USE_DNSRPS
CHECKFATAL(dns_dnsrps_server_create(), "initializing RPZ service "
"interface");
#endif /* ifdef USE_DNSRPS */
/* Initialize server data structures. */
server->interfacemgr = NULL;
ISC_LIST_INIT(server->kasplist);
ISC_LIST_INIT(server->viewlist);
server->in_roothints = NULL;
/* Must be first. */
CHECKFATAL(dst_lib_init(named_g_mctx, named_g_engine), "initializing "
"DST");
CHECKFATAL(dns_rootns_create(mctx, dns_rdataclass_in, NULL,
&server->in_roothints),
"setting up root hints");
isc_mutex_init(&server->reload_event_lock);
server->reload_event = isc_event_allocate(
named_g_mctx, server, NAMED_EVENT_RELOAD, named_server_reload,
server, sizeof(isc_event_t));
CHECKFATAL(server->reload_event == NULL ? ISC_R_NOMEMORY
: ISC_R_SUCCESS,
"allocating reload event");
server->reload_status = NAMED_RELOAD_IN_PROGRESS;
/*
* Setup the server task, which is responsible for coordinating
* startup and shutdown of the server, as well as all exclusive
* tasks.
*/
CHECKFATAL(isc_task_create(named_g_taskmgr, 0, &server->task),
"creating server task");
isc_task_setname(server->task, "server", server);
isc_taskmgr_setexcltask(named_g_taskmgr, server->task);
server->sctx = NULL;
CHECKFATAL(ns_server_create(mctx, get_matching_view, &server->sctx),
"creating server context");
#if defined(HAVE_GEOIP2)
/*
* GeoIP must be initialized before the interface
* manager (which includes the ACL environment)
* is created.
*/
named_geoip_init();
#endif /* HAVE_GEOIP2 */
#ifdef ENABLE_AFL
server->sctx->fuzztype = named_g_fuzz_type;
server->sctx->fuzznotify = named_fuzz_notify;
#endif /* ifdef ENABLE_AFL */
CHECKFATAL(isc_task_onshutdown(server->task, shutdown_server, server),
"isc_task_onshutdown");
CHECKFATAL(
isc_app_onrun(named_g_mctx, server->task, run_server, server),
"isc_app_onrun");
server->interface_timer = NULL;
server->heartbeat_timer = NULL;
server->pps_timer = NULL;
server->tat_timer = NULL;
server->interface_interval = 0;
server->heartbeat_interval = 0;
CHECKFATAL(dns_zonemgr_create(named_g_mctx, named_g_taskmgr,
named_g_timermgr, named_g_socketmgr,
&server->zonemgr),
"dns_zonemgr_create");
CHECKFATAL(dns_zonemgr_setsize(server->zonemgr, 1000), "dns_zonemgr_"
"setsize");
server->statsfile = isc_mem_strdup(server->mctx, "named.stats");
CHECKFATAL(server->statsfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
"isc_mem_strdup");
server->bindkeysfile = isc_mem_strdup(server->mctx,
named_g_defaultbindkeys);
CHECKFATAL(server->bindkeysfile == NULL ? ISC_R_NOMEMORY
: ISC_R_SUCCESS,
"isc_mem_strdup");
server->dumpfile = isc_mem_strdup(server->mctx, "named_dump.db");
CHECKFATAL(server->dumpfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
"isc_mem_strdup");
server->secrootsfile = isc_mem_strdup(server->mctx, "named.secroots");
CHECKFATAL(server->secrootsfile == NULL ? ISC_R_NOMEMORY
: ISC_R_SUCCESS,
"isc_mem_strdup");
server->recfile = isc_mem_strdup(server->mctx, "named.recursing");
CHECKFATAL(server->recfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
"isc_mem_strdup");
server->hostname_set = false;
server->hostname = NULL;
server->version_set = false;
server->version = NULL;
server->zonestats = NULL;
server->resolverstats = NULL;
server->sockstats = NULL;
CHECKFATAL(isc_stats_create(server->mctx, &server->sockstats,
isc_sockstatscounter_max),
"isc_stats_create");
isc_socketmgr_setstats(named_g_socketmgr, server->sockstats);
isc_nm_setstats(named_g_nm, server->sockstats);
CHECKFATAL(isc_stats_create(named_g_mctx, &server->zonestats,
dns_zonestatscounter_max),
"dns_stats_create (zone)");
CHECKFATAL(isc_stats_create(named_g_mctx, &server->resolverstats,
dns_resstatscounter_max),
"dns_stats_create (resolver)");
server->flushonshutdown = false;
server->controls = NULL;
CHECKFATAL(named_controls_create(server, &server->controls),
"named_controls_create");
server->dispatchgen = 0;
ISC_LIST_INIT(server->dispatches);
ISC_LIST_INIT(server->statschannels);
ISC_LIST_INIT(server->cachelist);
server->sessionkey = NULL;
server->session_keyfile = NULL;
server->session_keyname = NULL;
server->session_keyalg = DST_ALG_UNKNOWN;
server->session_keybits = 0;
server->lockfile = NULL;
server->dtenv = NULL;
server->magic = NAMED_SERVER_MAGIC;
*serverp = server;
}
void
named_server_destroy(named_server_t **serverp) {
named_server_t *server = *serverp;
REQUIRE(NAMED_SERVER_VALID(server));
#ifdef HAVE_DNSTAP
if (server->dtenv != NULL) {
dns_dt_detach(&server->dtenv);
}
#endif /* HAVE_DNSTAP */
#ifdef USE_DNSRPS
dns_dnsrps_server_destroy();
#endif /* ifdef USE_DNSRPS */
named_controls_destroy(&server->controls);
isc_stats_detach(&server->zonestats);
isc_stats_detach(&server->sockstats);
isc_stats_detach(&server->resolverstats);
if (server->sctx != NULL) {
ns_server_detach(&server->sctx);
}
isc_mem_free(server->mctx, server->statsfile);
isc_mem_free(server->mctx, server->bindkeysfile);
isc_mem_free(server->mctx, server->dumpfile);
isc_mem_free(server->mctx, server->secrootsfile);
isc_mem_free(server->mctx, server->recfile);
if (server->version != NULL) {
isc_mem_free(server->mctx, server->version);
}
if (server->hostname != NULL) {
isc_mem_free(server->mctx, server->hostname);
}
if (server->lockfile != NULL) {
isc_mem_free(server->mctx, server->lockfile);
}
if (server->zonemgr != NULL) {
dns_zonemgr_detach(&server->zonemgr);
}
dst_lib_destroy();
isc_event_free(&server->reload_event);
INSIST(ISC_LIST_EMPTY(server->kasplist));
INSIST(ISC_LIST_EMPTY(server->viewlist));
INSIST(ISC_LIST_EMPTY(server->cachelist));
server->magic = 0;
isc_mem_put(server->mctx, server, sizeof(*server));
*serverp = NULL;
}
static void
fatal(named_server_t *server, const char *msg, isc_result_t result) {
if (server != NULL) {
/*
* Prevent races between the OpenSSL on_exit registered
* function and any other OpenSSL calls from other tasks
* by requesting exclusive access to the task manager.
*/
(void)isc_task_beginexclusive(server->task);
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_CRITICAL, "%s: %s", msg,
isc_result_totext(result));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_CRITICAL,
"exiting (due to fatal error)");
named_os_shutdown();
exit(1);
}
static void
start_reserved_dispatches(named_server_t *server) {
REQUIRE(NAMED_SERVER_VALID(server));
server->dispatchgen++;
}
static void
end_reserved_dispatches(named_server_t *server, bool all) {
named_dispatch_t *dispatch, *nextdispatch;
REQUIRE(NAMED_SERVER_VALID(server));
for (dispatch = ISC_LIST_HEAD(server->dispatches); dispatch != NULL;
dispatch = nextdispatch)
{
nextdispatch = ISC_LIST_NEXT(dispatch, link);
if (!all && server->dispatchgen == dispatch->dispatchgen) {
continue;
}
ISC_LIST_UNLINK(server->dispatches, dispatch, link);
dns_dispatch_detach(&dispatch->dispatch);
isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
}
}
void
named_add_reserved_dispatch(named_server_t *server,
const isc_sockaddr_t *addr) {
named_dispatch_t *dispatch;
in_port_t port;
char addrbuf[ISC_SOCKADDR_FORMATSIZE];
isc_result_t result;
unsigned int attrs, attrmask;
REQUIRE(NAMED_SERVER_VALID(server));
port = isc_sockaddr_getport(addr);
if (port == 0 || port >= 1024) {
return;
}
for (dispatch = ISC_LIST_HEAD(server->dispatches); dispatch != NULL;
dispatch = ISC_LIST_NEXT(dispatch, link))
{
if (isc_sockaddr_equal(&dispatch->addr, addr)) {
break;
}
}
if (dispatch != NULL) {
dispatch->dispatchgen = server->dispatchgen;
return;
}
dispatch = isc_mem_get(server->mctx, sizeof(*dispatch));
dispatch->addr = *addr;
dispatch->dispatchgen = server->dispatchgen;
dispatch->dispatch = NULL;
attrs = 0;
attrs |= DNS_DISPATCHATTR_UDP;
switch (isc_sockaddr_pf(addr)) {
case AF_INET:
attrs |= DNS_DISPATCHATTR_IPV4;
break;
case AF_INET6:
attrs |= DNS_DISPATCHATTR_IPV6;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
attrmask = 0;
attrmask |= DNS_DISPATCHATTR_UDP;
attrmask |= DNS_DISPATCHATTR_TCP;
attrmask |= DNS_DISPATCHATTR_IPV4;
attrmask |= DNS_DISPATCHATTR_IPV6;
result = dns_dispatch_getudp(named_g_dispatchmgr, named_g_socketmgr,
named_g_taskmgr, &dispatch->addr, 4096,
UDPBUFFERS, 32768, 16411, 16433, attrs,
attrmask, &dispatch->dispatch);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
ISC_LIST_INITANDPREPEND(server->dispatches, dispatch, link);
return;
cleanup:
isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
isc_sockaddr_format(addr, addrbuf, sizeof(addrbuf));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"unable to create dispatch for reserved port %s: %s",
addrbuf, isc_result_totext(result));
}
static isc_result_t
loadconfig(named_server_t *server) {
isc_result_t result;
start_reserved_dispatches(server);
result = load_configuration(named_g_conffile, server, false);
if (result == ISC_R_SUCCESS) {
end_reserved_dispatches(server, false);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"reloading configuration succeeded");
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"reloading configuration failed: %s",
isc_result_totext(result));
server->reload_status = NAMED_RELOAD_FAILED;
}
return (result);
}
static isc_result_t
reload(named_server_t *server) {
isc_result_t result;
server->reload_status = NAMED_RELOAD_IN_PROGRESS;
CHECK(loadconfig(server));
result = load_zones(server, false, false);
if (result == ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"reloading zones succeeded");
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"reloading zones failed: %s",
isc_result_totext(result));
server->reload_status = NAMED_RELOAD_FAILED;
}
cleanup:
return (result);
}
/*
* Handle a reload event (from SIGHUP).
*/
static void
named_server_reload(isc_task_t *task, isc_event_t *event) {
named_server_t *server = (named_server_t *)event->ev_arg;
INSIST(task == server->task);
UNUSED(task);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"received SIGHUP signal to reload zones");
(void)reload(server);
LOCK(&server->reload_event_lock);
INSIST(server->reload_event == NULL);
server->reload_event = event;
UNLOCK(&server->reload_event_lock);
}
void
named_server_reloadwanted(named_server_t *server) {
LOCK(&server->reload_event_lock);
if (server->reload_event != NULL) {
isc_task_send(server->task, &server->reload_event);
}
UNLOCK(&server->reload_event_lock);
}
void
named_server_scan_interfaces(named_server_t *server) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
"automatic interface rescan");
ns_interfacemgr_scan(server->interfacemgr, true);
}
/*
* Get the next token from lexer 'lex'.
*
* NOTE: the token value for string tokens always uses the same pointer
* value. Multiple calls to this function on the same lexer will always
* return either that value (lex->data) or NULL. It is necessary to copy
* the token into local storage if it needs to be referenced after the next
* call to next_token().
*/
static char *
next_token(isc_lex_t *lex, isc_buffer_t **text) {
isc_result_t result;
isc_token_t token;
token.type = isc_tokentype_unknown;
result = isc_lex_gettoken(lex, ISC_LEXOPT_EOF | ISC_LEXOPT_QSTRING,
&token);
switch (result) {
case ISC_R_NOMORE:
(void)isc_lex_close(lex);
break;
case ISC_R_SUCCESS:
if (token.type == isc_tokentype_eof) {
(void)isc_lex_close(lex);
}
break;
case ISC_R_NOSPACE:
if (text != NULL) {
(void)putstr(text, "token too large");
(void)putnull(text);
}
return (NULL);
default:
if (text != NULL) {
(void)putstr(text, isc_result_totext(result));
(void)putnull(text);
}
return (NULL);
}
if (token.type == isc_tokentype_string ||
token.type == isc_tokentype_qstring) {
return (token.value.as_textregion.base);
}
return (NULL);
}
/*
* Find the zone specified in the control channel command, if any.
* If a zone is specified, point '*zonep' at it, otherwise
* set '*zonep' to NULL, and f 'zonename' is not NULL, copy
* the zone name into it (N.B. 'zonename' must have space to hold
* a full DNS name).
*
* If 'zonetxt' is set, the caller has already pulled a token
* off the command line that is to be used as the zone name. (This
* is sometimes done when it's necessary to check for an optional
* argument before the zone name, as in "rndc sync [-clean] zone".)
*/
static isc_result_t
zone_from_args(named_server_t *server, isc_lex_t *lex, const char *zonetxt,
dns_zone_t **zonep, char *zonename, isc_buffer_t **text,
bool skip) {
char *ptr;
char *classtxt;
const char *viewtxt = NULL;
dns_fixedname_t fname;
dns_name_t *name;
isc_result_t result;
dns_view_t *view = NULL;
dns_rdataclass_t rdclass;
char problem[DNS_NAME_FORMATSIZE + 500] = "";
char zonebuf[DNS_NAME_FORMATSIZE];
bool redirect = false;
REQUIRE(zonep != NULL && *zonep == NULL);
if (skip) {
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
}
/* Look for the zone name. */
if (zonetxt == NULL) {
zonetxt = next_token(lex, text);
}
if (zonetxt == NULL) {
return (ISC_R_SUCCESS);
}
/* Copy zonetxt because it'll be overwritten by next_token() */
/* To locate a zone named "-redirect" use "-redirect." */
if (strcmp(zonetxt, "-redirect") == 0) {
redirect = true;
strlcpy(zonebuf, ".", DNS_NAME_FORMATSIZE);
} else {
strlcpy(zonebuf, zonetxt, DNS_NAME_FORMATSIZE);
}
if (zonename != NULL) {
strlcpy(zonename, redirect ? "." : zonetxt,
DNS_NAME_FORMATSIZE);
}
name = dns_fixedname_initname(&fname);
CHECK(dns_name_fromstring(name, zonebuf, 0, NULL));
/* Look for the optional class name. */
classtxt = next_token(lex, text);
if (classtxt != NULL) {
isc_textregion_t r;
r.base = classtxt;
r.length = strlen(classtxt);
CHECK(dns_rdataclass_fromtext(&rdclass, &r));
/* Look for the optional view name. */
viewtxt = next_token(lex, text);
} else {
rdclass = dns_rdataclass_in;
}
if (viewtxt == NULL) {
if (redirect) {
result = dns_viewlist_find(&server->viewlist,
"_default",
dns_rdataclass_in, &view);
if (result != ISC_R_SUCCESS || view->redirect == NULL) {
result = ISC_R_NOTFOUND;
snprintf(problem, sizeof(problem),
"redirect zone not found in "
"_default view");
} else {
dns_zone_attach(view->redirect, zonep);
result = ISC_R_SUCCESS;
}
} else {
result = dns_viewlist_findzone(&server->viewlist, name,
(classtxt == NULL),
rdclass, zonep);
if (result == ISC_R_NOTFOUND) {
snprintf(problem, sizeof(problem),
"no matching zone '%s' in any view",
zonebuf);
} else if (result == ISC_R_MULTIPLE) {
snprintf(problem, sizeof(problem),
"zone '%s' was found in multiple "
"views",
zonebuf);
}
}
} else {
result = dns_viewlist_find(&server->viewlist, viewtxt, rdclass,
&view);
if (result != ISC_R_SUCCESS) {
snprintf(problem, sizeof(problem),
"no matching view '%s'", viewtxt);
goto report;
}
if (redirect) {
if (view->redirect != NULL) {
dns_zone_attach(view->redirect, zonep);
result = ISC_R_SUCCESS;
} else {
result = ISC_R_NOTFOUND;
}
} else {
result = dns_zt_find(view->zonetable, name, 0, NULL,
zonep);
}
if (result != ISC_R_SUCCESS) {
snprintf(problem, sizeof(problem),
"no matching zone '%s' in view '%s'", zonebuf,
viewtxt);
}
}
/* Partial match? */
if (result != ISC_R_SUCCESS && *zonep != NULL) {
dns_zone_detach(zonep);
}
if (result == DNS_R_PARTIALMATCH) {
result = ISC_R_NOTFOUND;
}
report:
if (result != ISC_R_SUCCESS) {
isc_result_t tresult;
tresult = putstr(text, problem);
if (tresult == ISC_R_SUCCESS) {
(void)putnull(text);
}
}
cleanup:
if (view != NULL) {
dns_view_detach(&view);
}
return (result);
}
/*
* Act on a "retransfer" command from the command channel.
*/
isc_result_t
named_server_retransfercommand(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result;
dns_zone_t *zone = NULL;
dns_zone_t *raw = NULL;
dns_zonetype_t type;
result = zone_from_args(server, lex, NULL, &zone, NULL, text, true);
if (result != ISC_R_SUCCESS) {
return (result);
}
if (zone == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
dns_zone_getraw(zone, &raw);
if (raw != NULL) {
dns_zone_detach(&zone);
dns_zone_attach(raw, &zone);
dns_zone_detach(&raw);
}
type = dns_zone_gettype(zone);
if (type == dns_zone_slave || type == dns_zone_mirror ||
type == dns_zone_stub ||
(type == dns_zone_redirect &&
dns_zone_getredirecttype(zone) == dns_zone_slave))
{
dns_zone_forcereload(zone);
} else {
result = ISC_R_NOTFOUND;
}
dns_zone_detach(&zone);
return (result);
}
/*
* Act on a "reload" command from the command channel.
*/
isc_result_t
named_server_reloadcommand(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result;
dns_zone_t *zone = NULL;
dns_zonetype_t type;
const char *msg = NULL;
result = zone_from_args(server, lex, NULL, &zone, NULL, text, true);
if (result != ISC_R_SUCCESS) {
return (result);
}
if (zone == NULL) {
result = reload(server);
if (result == ISC_R_SUCCESS) {
msg = "server reload successful";
}
} else {
type = dns_zone_gettype(zone);
if (type == dns_zone_slave || type == dns_zone_mirror ||
type == dns_zone_stub) {
dns_zone_refresh(zone);
dns_zone_detach(&zone);
msg = "zone refresh queued";
} else {
result = dns_zone_load(zone, false);
dns_zone_detach(&zone);
switch (result) {
case ISC_R_SUCCESS:
msg = "zone reload successful";
break;
case DNS_R_CONTINUE:
msg = "zone reload queued";
result = ISC_R_SUCCESS;
break;
case DNS_R_UPTODATE:
msg = "zone reload up-to-date";
result = ISC_R_SUCCESS;
break;
default:
/* failure message will be generated by rndc */
break;
}
}
}
if (msg != NULL) {
(void)putstr(text, msg);
(void)putnull(text);
}
return (result);
}
/*
* Act on a "reconfig" command from the command channel.
*/
isc_result_t
named_server_reconfigcommand(named_server_t *server) {
isc_result_t result;
server->reload_status = NAMED_RELOAD_IN_PROGRESS;
CHECK(loadconfig(server));
result = load_zones(server, false, true);
if (result == ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"scheduled loading new zones");
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"loading new zones failed: %s",
isc_result_totext(result));
server->reload_status = NAMED_RELOAD_FAILED;
}
cleanup:
return (result);
}
/*
* Act on a "notify" command from the command channel.
*/
isc_result_t
named_server_notifycommand(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result;
dns_zone_t *zone = NULL;
const char msg[] = "zone notify queued";
result = zone_from_args(server, lex, NULL, &zone, NULL, text, true);
if (result != ISC_R_SUCCESS) {
return (result);
}
if (zone == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
dns_zone_notify(zone);
dns_zone_detach(&zone);
(void)putstr(text, msg);
(void)putnull(text);
return (ISC_R_SUCCESS);
}
/*
* Act on a "refresh" command from the command channel.
*/
isc_result_t
named_server_refreshcommand(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result;
dns_zone_t *zone = NULL, *raw = NULL;
const char msg1[] = "zone refresh queued";
const char msg2[] = "not a slave, mirror, or stub zone";
dns_zonetype_t type;
result = zone_from_args(server, lex, NULL, &zone, NULL, text, true);
if (result != ISC_R_SUCCESS) {
return (result);
}
if (zone == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
dns_zone_getraw(zone, &raw);
if (raw != NULL) {
dns_zone_detach(&zone);
dns_zone_attach(raw, &zone);
dns_zone_detach(&raw);
}
type = dns_zone_gettype(zone);
if (type == dns_zone_slave || type == dns_zone_mirror ||
type == dns_zone_stub) {
dns_zone_refresh(zone);
dns_zone_detach(&zone);
(void)putstr(text, msg1);
(void)putnull(text);
return (ISC_R_SUCCESS);
}
dns_zone_detach(&zone);
(void)putstr(text, msg2);
(void)putnull(text);
return (ISC_R_FAILURE);
}
isc_result_t
named_server_togglequerylog(named_server_t *server, isc_lex_t *lex) {
bool prev, value;
char *ptr;
/* Skip the command name. */
ptr = next_token(lex, NULL);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
prev = ns_server_getoption(server->sctx, NS_SERVER_LOGQUERIES);
ptr = next_token(lex, NULL);
if (ptr == NULL) {
value = !prev;
} else if (!strcasecmp(ptr, "on") || !strcasecmp(ptr, "yes") ||
!strcasecmp(ptr, "enable") || !strcasecmp(ptr, "true"))
{
value = true;
} else if (!strcasecmp(ptr, "off") || !strcasecmp(ptr, "no") ||
!strcasecmp(ptr, "disable") || !strcasecmp(ptr, "false"))
{
value = false;
} else {
return (DNS_R_SYNTAX);
}
if (value == prev) {
return (ISC_R_SUCCESS);
}
ns_server_setoption(server->sctx, NS_SERVER_LOGQUERIES, value);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"query logging is now %s", value ? "on" : "off");
return (ISC_R_SUCCESS);
}
static isc_result_t
ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
cfg_aclconfctx_t *actx, isc_mem_t *mctx,
uint16_t family, ns_listenlist_t **target) {
isc_result_t result;
const cfg_listelt_t *element;
ns_listenlist_t *dlist = NULL;
REQUIRE(target != NULL && *target == NULL);
result = ns_listenlist_create(mctx, &dlist);
if (result != ISC_R_SUCCESS) {
return (result);
}
for (element = cfg_list_first(listenlist); element != NULL;
element = cfg_list_next(element))
{
ns_listenelt_t *delt = NULL;
const cfg_obj_t *listener = cfg_listelt_value(element);
result = ns_listenelt_fromconfig(listener, config, actx, mctx,
family, &delt);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
ISC_LIST_APPEND(dlist->elts, delt, link);
}
*target = dlist;
return (ISC_R_SUCCESS);
cleanup:
ns_listenlist_detach(&dlist);
return (result);
}
/*
* Create a listen list from the corresponding configuration
* data structure.
*/
static isc_result_t
ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
cfg_aclconfctx_t *actx, isc_mem_t *mctx,
uint16_t family, ns_listenelt_t **target) {
isc_result_t result;
const cfg_obj_t *portobj, *dscpobj;
in_port_t port;
isc_dscp_t dscp = -1;
ns_listenelt_t *delt = NULL;
REQUIRE(target != NULL && *target == NULL);
portobj = cfg_tuple_get(listener, "port");
if (!cfg_obj_isuint32(portobj)) {
if (named_g_port != 0) {
port = named_g_port;
} else {
result = named_config_getport(config, &port);
if (result != ISC_R_SUCCESS) {
return (result);
}
}
} else {
if (cfg_obj_asuint32(portobj) >= UINT16_MAX) {
cfg_obj_log(portobj, named_g_lctx, ISC_LOG_ERROR,
"port value '%u' is out of range",
cfg_obj_asuint32(portobj));
return (ISC_R_RANGE);
}
port = (in_port_t)cfg_obj_asuint32(portobj);
}
dscpobj = cfg_tuple_get(listener, "dscp");
if (!cfg_obj_isuint32(dscpobj)) {
dscp = named_g_dscp;
} else {
if (cfg_obj_asuint32(dscpobj) > 63) {
cfg_obj_log(dscpobj, named_g_lctx, ISC_LOG_ERROR,
"dscp value '%u' is out of range",
cfg_obj_asuint32(dscpobj));
return (ISC_R_RANGE);
}
dscp = (isc_dscp_t)cfg_obj_asuint32(dscpobj);
}
result = ns_listenelt_create(mctx, port, dscp, NULL, &delt);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = cfg_acl_fromconfig2(cfg_tuple_get(listener, "acl"), config,
named_g_lctx, actx, mctx, 0, family,
&delt->acl);
if (result != ISC_R_SUCCESS) {
ns_listenelt_destroy(delt);
return (result);
}
*target = delt;
return (ISC_R_SUCCESS);
}
isc_result_t
named_server_dumpstats(named_server_t *server) {
isc_result_t result;
FILE *fp = NULL;
CHECKMF(isc_stdio_open(server->statsfile, "a", &fp),
"could not open statistics dump file", server->statsfile);
result = named_stats_dump(server, fp);
cleanup:
if (fp != NULL) {
(void)isc_stdio_close(fp);
}
if (result == ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpstats complete");
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumpstats failed: %s",
dns_result_totext(result));
}
return (result);
}
static isc_result_t
add_zone_tolist(dns_zone_t *zone, void *uap) {
struct dumpcontext *dctx = uap;
struct zonelistentry *zle;
zle = isc_mem_get(dctx->mctx, sizeof *zle);
zle->zone = NULL;
dns_zone_attach(zone, &zle->zone);
ISC_LINK_INIT(zle, link);
ISC_LIST_APPEND(ISC_LIST_TAIL(dctx->viewlist)->zonelist, zle, link);
return (ISC_R_SUCCESS);
}
static isc_result_t
add_view_tolist(struct dumpcontext *dctx, dns_view_t *view) {
struct viewlistentry *vle;
isc_result_t result = ISC_R_SUCCESS;
/*
* Prevent duplicate views.
*/
for (vle = ISC_LIST_HEAD(dctx->viewlist); vle != NULL;
vle = ISC_LIST_NEXT(vle, link))
{
if (vle->view == view) {
return (ISC_R_SUCCESS);
}
}
vle = isc_mem_get(dctx->mctx, sizeof *vle);
vle->view = NULL;
dns_view_attach(view, &vle->view);
ISC_LINK_INIT(vle, link);
ISC_LIST_INIT(vle->zonelist);
ISC_LIST_APPEND(dctx->viewlist, vle, link);
if (dctx->dumpzones) {
result = dns_zt_apply(view->zonetable, true, NULL,
add_zone_tolist, dctx);
}
return (result);
}
static void
dumpcontext_destroy(struct dumpcontext *dctx) {
struct viewlistentry *vle;
struct zonelistentry *zle;
vle = ISC_LIST_HEAD(dctx->viewlist);
while (vle != NULL) {
ISC_LIST_UNLINK(dctx->viewlist, vle, link);
zle = ISC_LIST_HEAD(vle->zonelist);
while (zle != NULL) {
ISC_LIST_UNLINK(vle->zonelist, zle, link);
dns_zone_detach(&zle->zone);
isc_mem_put(dctx->mctx, zle, sizeof *zle);
zle = ISC_LIST_HEAD(vle->zonelist);
}
dns_view_detach(&vle->view);
isc_mem_put(dctx->mctx, vle, sizeof *vle);
vle = ISC_LIST_HEAD(dctx->viewlist);
}
if (dctx->version != NULL) {
dns_db_closeversion(dctx->db, &dctx->version, false);
}
if (dctx->db != NULL) {
dns_db_detach(&dctx->db);
}
if (dctx->cache != NULL) {
dns_db_detach(&dctx->cache);
}
if (dctx->task != NULL) {
isc_task_detach(&dctx->task);
}
if (dctx->fp != NULL) {
(void)isc_stdio_close(dctx->fp);
}
if (dctx->mdctx != NULL) {
dns_dumpctx_detach(&dctx->mdctx);
}
isc_mem_put(dctx->mctx, dctx, sizeof *dctx);
}
static void
dumpdone(void *arg, isc_result_t result) {
struct dumpcontext *dctx = arg;
char buf[1024 + 32];
const dns_master_style_t *style;
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
if (dctx->mdctx != NULL) {
dns_dumpctx_detach(&dctx->mdctx);
}
if (dctx->view == NULL) {
dctx->view = ISC_LIST_HEAD(dctx->viewlist);
if (dctx->view == NULL) {
goto done;
}
INSIST(dctx->zone == NULL);
} else {
goto resume;
}
nextview:
fprintf(dctx->fp, ";\n; Start view %s\n;\n", dctx->view->view->name);
resume:
if (dctx->dumpcache && dns_view_iscacheshared(dctx->view->view)) {
fprintf(dctx->fp, ";\n; Cache of view '%s' is shared as '%s'\n",
dctx->view->view->name,
dns_cache_getname(dctx->view->view->cache));
} else if (dctx->zone == NULL && dctx->cache == NULL && dctx->dumpcache)
{
style = &dns_master_style_cache;
/* start cache dump */
if (dctx->view->view->cachedb != NULL) {
dns_db_attach(dctx->view->view->cachedb, &dctx->cache);
}
if (dctx->cache != NULL) {
fprintf(dctx->fp,
";\n; Cache dump of view '%s' (cache %s)\n;\n",
dctx->view->view->name,
dns_cache_getname(dctx->view->view->cache));
result = dns_master_dumptostreaminc(
dctx->mctx, dctx->cache, NULL, style, dctx->fp,
dctx->task, dumpdone, dctx, &dctx->mdctx);
if (result == DNS_R_CONTINUE) {
return;
}
if (result == ISC_R_NOTIMPLEMENTED) {
fprintf(dctx->fp, "; %s\n",
dns_result_totext(result));
} else if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
}
if ((dctx->dumpadb || dctx->dumpbad || dctx->dumpfail) &&
dctx->cache == NULL && dctx->view->view->cachedb != NULL)
{
dns_db_attach(dctx->view->view->cachedb, &dctx->cache);
}
if (dctx->cache != NULL) {
if (dctx->dumpadb) {
dns_adb_dump(dctx->view->view->adb, dctx->fp);
}
if (dctx->dumpbad) {
dns_resolver_printbadcache(dctx->view->view->resolver,
dctx->fp);
}
if (dctx->dumpfail) {
dns_badcache_print(dctx->view->view->failcache,
"SERVFAIL cache", dctx->fp);
}
dns_db_detach(&dctx->cache);
}
if (dctx->dumpzones) {
style = &dns_master_style_full;
nextzone:
if (dctx->version != NULL) {
dns_db_closeversion(dctx->db, &dctx->version, false);
}
if (dctx->db != NULL) {
dns_db_detach(&dctx->db);
}
if (dctx->zone == NULL) {
dctx->zone = ISC_LIST_HEAD(dctx->view->zonelist);
} else {
dctx->zone = ISC_LIST_NEXT(dctx->zone, link);
}
if (dctx->zone != NULL) {
/* start zone dump */
dns_zone_name(dctx->zone->zone, buf, sizeof(buf));
fprintf(dctx->fp, ";\n; Zone dump of '%s'\n;\n", buf);
result = dns_zone_getdb(dctx->zone->zone, &dctx->db);
if (result != ISC_R_SUCCESS) {
fprintf(dctx->fp, "; %s\n",
dns_result_totext(result));
goto nextzone;
}
dns_db_currentversion(dctx->db, &dctx->version);
result = dns_master_dumptostreaminc(
dctx->mctx, dctx->db, dctx->version, style,
dctx->fp, dctx->task, dumpdone, dctx,
&dctx->mdctx);
if (result == DNS_R_CONTINUE) {
return;
}
if (result == ISC_R_NOTIMPLEMENTED) {
fprintf(dctx->fp, "; %s\n",
dns_result_totext(result));
result = ISC_R_SUCCESS;
POST(result);
goto nextzone;
}
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
}
if (dctx->view != NULL) {
dctx->view = ISC_LIST_NEXT(dctx->view, link);
if (dctx->view != NULL) {
goto nextview;
}
}
done:
fprintf(dctx->fp, "; Dump complete\n");
result = isc_stdio_flush(dctx->fp);
if (result == ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpdb complete");
}
cleanup:
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumpdb failed: %s", dns_result_totext(result));
}
dumpcontext_destroy(dctx);
}
isc_result_t
named_server_dumpdb(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
struct dumpcontext *dctx = NULL;
dns_view_t *view;
isc_result_t result;
char *ptr;
const char *sep;
bool found;
/* Skip the command name. */
ptr = next_token(lex, NULL);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
dctx = isc_mem_get(server->mctx, sizeof(*dctx));
dctx->mctx = server->mctx;
dctx->dumpcache = true;
dctx->dumpadb = true;
dctx->dumpbad = true;
dctx->dumpfail = true;
dctx->dumpzones = false;
dctx->fp = NULL;
ISC_LIST_INIT(dctx->viewlist);
dctx->view = NULL;
dctx->zone = NULL;
dctx->cache = NULL;
dctx->mdctx = NULL;
dctx->db = NULL;
dctx->cache = NULL;
dctx->task = NULL;
dctx->version = NULL;
isc_task_attach(server->task, &dctx->task);
CHECKMF(isc_stdio_open(server->dumpfile, "w", &dctx->fp),
"could not open dump file", server->dumpfile);
ptr = next_token(lex, NULL);
sep = (ptr == NULL) ? "" : ": ";
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpdb started%s%s", sep, (ptr != NULL) ? ptr : "");
if (ptr != NULL && strcmp(ptr, "-all") == 0) {
/* also dump zones */
dctx->dumpzones = true;
ptr = next_token(lex, NULL);
} else if (ptr != NULL && strcmp(ptr, "-cache") == 0) {
/* this is the default */
ptr = next_token(lex, NULL);
} else if (ptr != NULL && strcmp(ptr, "-zones") == 0) {
/* only dump zones, suppress caches */
dctx->dumpadb = false;
dctx->dumpbad = false;
dctx->dumpcache = false;
dctx->dumpfail = false;
dctx->dumpzones = true;
ptr = next_token(lex, NULL);
} else if (ptr != NULL && strcmp(ptr, "-adb") == 0) {
/* only dump adb, suppress other caches */
dctx->dumpbad = false;
dctx->dumpcache = false;
dctx->dumpfail = false;
ptr = next_token(lex, NULL);
} else if (ptr != NULL && strcmp(ptr, "-bad") == 0) {
/* only dump badcache, suppress other caches */
dctx->dumpadb = false;
dctx->dumpcache = false;
dctx->dumpfail = false;
ptr = next_token(lex, NULL);
} else if (ptr != NULL && strcmp(ptr, "-fail") == 0) {
/* only dump servfail cache, suppress other caches */
dctx->dumpadb = false;
dctx->dumpbad = false;
dctx->dumpcache = false;
ptr = next_token(lex, NULL);
}
nextview:
found = false;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (ptr != NULL && strcmp(view->name, ptr) != 0) {
continue;
}
found = true;
CHECK(add_view_tolist(dctx, view));
}
if (ptr != NULL) {
if (!found) {
CHECK(putstr(text, "view '"));
CHECK(putstr(text, ptr));
CHECK(putstr(text, "' not found"));
CHECK(putnull(text));
result = ISC_R_NOTFOUND;
dumpdone(dctx, result);
return (result);
}
ptr = next_token(lex, NULL);
if (ptr != NULL) {
goto nextview;
}
}
dumpdone(dctx, ISC_R_SUCCESS);
return (ISC_R_SUCCESS);
cleanup:
dumpcontext_destroy(dctx);
return (result);
}
isc_result_t
named_server_dumpsecroots(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
dns_view_t *view;
dns_keytable_t *secroots = NULL;
dns_ntatable_t *ntatable = NULL;
isc_result_t result;
char *ptr;
FILE *fp = NULL;
isc_time_t now;
char tbuf[64];
unsigned int used = isc_buffer_usedlength(*text);
bool first = true;
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* "-" here means print the output instead of dumping to file */
ptr = next_token(lex, text);
if (ptr != NULL && strcmp(ptr, "-") == 0) {
ptr = next_token(lex, text);
} else {
result = isc_stdio_open(server->secrootsfile, "w", &fp);
if (result != ISC_R_SUCCESS) {
(void)putstr(text, "could not open ");
(void)putstr(text, server->secrootsfile);
CHECKMF(result, "could not open secroots dump file",
server->secrootsfile);
}
}
TIME_NOW(&now);
isc_time_formattimestamp(&now, tbuf, sizeof(tbuf));
CHECK(putstr(text, "secure roots as of "));
CHECK(putstr(text, tbuf));
CHECK(putstr(text, ":\n"));
used = isc_buffer_usedlength(*text);
do {
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (ptr != NULL && strcmp(view->name, ptr) != 0) {
continue;
}
if (secroots != NULL) {
dns_keytable_detach(&secroots);
}
result = dns_view_getsecroots(view, &secroots);
if (result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
continue;
}
if (first || used != isc_buffer_usedlength(*text)) {
CHECK(putstr(text, "\n"));
first = false;
}
CHECK(putstr(text, " Start view "));
CHECK(putstr(text, view->name));
CHECK(putstr(text, "\n Secure roots:\n\n"));
used = isc_buffer_usedlength(*text);
CHECK(dns_keytable_totext(secroots, text));
if (ntatable != NULL) {
dns_ntatable_detach(&ntatable);
}
result = dns_view_getntatable(view, &ntatable);
if (result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
continue;
}
if (used != isc_buffer_usedlength(*text)) {
CHECK(putstr(text, "\n"));
}
CHECK(putstr(text, " Negative trust anchors:\n\n"));
used = isc_buffer_usedlength(*text);
CHECK(dns_ntatable_totext(ntatable, NULL, text));
}
if (ptr != NULL) {
ptr = next_token(lex, text);
}
} while (ptr != NULL);
cleanup:
if (secroots != NULL) {
dns_keytable_detach(&secroots);
}
if (ntatable != NULL) {
dns_ntatable_detach(&ntatable);
}
if (fp != NULL) {
if (used != isc_buffer_usedlength(*text)) {
(void)putstr(text, "\n");
}
fprintf(fp, "%.*s", (int)isc_buffer_usedlength(*text),
(char *)isc_buffer_base(*text));
isc_buffer_clear(*text);
(void)isc_stdio_close(fp);
} else if (isc_buffer_usedlength(*text) > 0) {
(void)putnull(text);
}
if (result == ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpsecroots complete");
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumpsecroots failed: %s",
dns_result_totext(result));
}
return (result);
}
isc_result_t
named_server_dumprecursing(named_server_t *server) {
FILE *fp = NULL;
dns_view_t *view;
isc_result_t result;
CHECKMF(isc_stdio_open(server->recfile, "w", &fp),
"could not open dump file", server->recfile);
fprintf(fp, ";\n; Recursing Queries\n;\n");
ns_interfacemgr_dumprecursing(fp, server->interfacemgr);
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
fprintf(fp, ";\n; Active fetch domains [view: %s]\n;\n",
view->name);
dns_resolver_dumpfetches(view->resolver, isc_statsformat_file,
fp);
}
fprintf(fp, "; Dump complete\n");
cleanup:
if (fp != NULL) {
result = isc_stdio_close(fp);
}
if (result == ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumprecursing complete");
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumprecursing failed: %s",
dns_result_totext(result));
}
return (result);
}
isc_result_t
named_server_setdebuglevel(named_server_t *server, isc_lex_t *lex) {
char *ptr;
char *endp;
long newlevel;
UNUSED(server);
/* Skip the command name. */
ptr = next_token(lex, NULL);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Look for the new level name. */
ptr = next_token(lex, NULL);
if (ptr == NULL) {
if (named_g_debuglevel < 99) {
named_g_debuglevel++;
}
} else {
newlevel = strtol(ptr, &endp, 10);
if (*endp != '\0' || newlevel < 0 || newlevel > 99) {
return (ISC_R_RANGE);
}
named_g_debuglevel = (unsigned int)newlevel;
}
isc_log_setdebuglevel(named_g_lctx, named_g_debuglevel);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"debug level is now %u", named_g_debuglevel);
return (ISC_R_SUCCESS);
}
isc_result_t
named_server_validation(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
char *ptr;
dns_view_t *view;
bool changed = false;
isc_result_t result;
bool enable = true, set = true, first = true;
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Find out what we are to do. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (!strcasecmp(ptr, "on") || !strcasecmp(ptr, "yes") ||
!strcasecmp(ptr, "enable") || !strcasecmp(ptr, "true"))
{
enable = true;
} else if (!strcasecmp(ptr, "off") || !strcasecmp(ptr, "no") ||
!strcasecmp(ptr, "disable") || !strcasecmp(ptr, "false"))
{
enable = false;
} else if (!strcasecmp(ptr, "check") || !strcasecmp(ptr, "status")) {
set = false;
} else {
return (DNS_R_SYNTAX);
}
/* Look for the view name. */
ptr = next_token(lex, text);
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if ((ptr != NULL && strcasecmp(ptr, view->name) != 0) ||
strcasecmp("_bind", view->name) == 0)
{
continue;
}
if (set) {
CHECK(dns_view_flushcache(view, false));
view->enablevalidation = enable;
changed = true;
} else {
if (!first) {
CHECK(putstr(text, "\n"));
}
CHECK(putstr(text, "DNSSEC validation is "));
CHECK(putstr(text, view->enablevalidation
? "enabled"
: "disabled"));
CHECK(putstr(text, " (view "));
CHECK(putstr(text, view->name));
CHECK(putstr(text, ")"));
first = false;
}
}
CHECK(putnull(text));
if (!set) {
result = ISC_R_SUCCESS;
} else if (changed) {
result = ISC_R_SUCCESS;
} else {
result = ISC_R_FAILURE;
}
cleanup:
isc_task_endexclusive(server->task);
return (result);
}
isc_result_t
named_server_flushcache(named_server_t *server, isc_lex_t *lex) {
char *ptr;
dns_view_t *view;
bool flushed;
bool found;
isc_result_t result;
named_cache_t *nsc;
/* Skip the command name. */
ptr = next_token(lex, NULL);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Look for the view name. */
ptr = next_token(lex, NULL);
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
flushed = true;
found = false;
/*
* Flushing a cache is tricky when caches are shared by multiple views.
* We first identify which caches should be flushed in the local cache
* list, flush these caches, and then update other views that refer to
* the flushed cache DB.
*/
if (ptr != NULL) {
/*
* Mark caches that need to be flushed. This is an O(#view^2)
* operation in the very worst case, but should be normally
* much more lightweight because only a few (most typically just
* one) views will match.
*/
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (strcasecmp(ptr, view->name) != 0) {
continue;
}
found = true;
for (nsc = ISC_LIST_HEAD(server->cachelist);
nsc != NULL; nsc = ISC_LIST_NEXT(nsc, link))
{
if (nsc->cache == view->cache) {
break;
}
}
INSIST(nsc != NULL);
nsc->needflush = true;
}
} else {
found = true;
}
/* Perform flush */
for (nsc = ISC_LIST_HEAD(server->cachelist); nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link))
{
if (ptr != NULL && !nsc->needflush) {
continue;
}
nsc->needflush = true;
result = dns_view_flushcache(nsc->primaryview, false);
if (result != ISC_R_SUCCESS) {
flushed = false;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing cache in view '%s' failed: %s",
nsc->primaryview->name,
isc_result_totext(result));
}
}
/*
* Fix up views that share a flushed cache: let the views update the
* cache DB they're referring to. This could also be an expensive
* operation, but should typically be marginal: the inner loop is only
* necessary for views that share a cache, and if there are many such
* views the number of shared cache should normally be small.
* A worst case is that we have n views and n/2 caches, each shared by
* two views. Then this will be a O(n^2/4) operation.
*/
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (!dns_view_iscacheshared(view)) {
continue;
}
for (nsc = ISC_LIST_HEAD(server->cachelist); nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link))
{
if (!nsc->needflush || nsc->cache != view->cache) {
continue;
}
result = dns_view_flushcache(view, true);
if (result != ISC_R_SUCCESS) {
flushed = false;
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"fixing cache in view '%s' "
"failed: %s",
view->name, isc_result_totext(result));
}
}
}
/* Cleanup the cache list. */
for (nsc = ISC_LIST_HEAD(server->cachelist); nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link))
{
nsc->needflush = false;
}
if (flushed && found) {
if (ptr != NULL) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing cache in view '%s' succeeded",
ptr);
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing caches in all views succeeded");
}
result = ISC_R_SUCCESS;
} else {
if (!found) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing cache in view '%s' failed: "
"view not found",
ptr);
result = ISC_R_NOTFOUND;
} else {
result = ISC_R_FAILURE;
}
}
isc_task_endexclusive(server->task);
return (result);
}
isc_result_t
named_server_flushnode(named_server_t *server, isc_lex_t *lex, bool tree) {
char *ptr, *viewname;
char target[DNS_NAME_FORMATSIZE];
dns_view_t *view;
bool flushed;
bool found;
isc_result_t result;
isc_buffer_t b;
dns_fixedname_t fixed;
dns_name_t *name;
/* Skip the command name. */
ptr = next_token(lex, NULL);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Find the domain name to flush. */
ptr = next_token(lex, NULL);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
strlcpy(target, ptr, DNS_NAME_FORMATSIZE);
isc_buffer_constinit(&b, target, strlen(target));
isc_buffer_add(&b, strlen(target));
name = dns_fixedname_initname(&fixed);
result = dns_name_fromtext(name, &b, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS) {
return (result);
}
/* Look for the view name. */
viewname = next_token(lex, NULL);
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
flushed = true;
found = false;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (viewname != NULL && strcasecmp(viewname, view->name) != 0) {
continue;
}
found = true;
/*
* It's a little inefficient to try flushing name for all views
* if some of the views share a single cache. But since the
* operation is lightweight we prefer simplicity here.
*/
result = dns_view_flushnode(view, name, tree);
if (result != ISC_R_SUCCESS) {
flushed = false;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing %s '%s' in cache view '%s' "
"failed: %s",
tree ? "tree" : "name", target,
view->name, isc_result_totext(result));
}
}
if (flushed && found) {
if (viewname != NULL) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing %s '%s' in cache view '%s' "
"succeeded",
tree ? "tree" : "name", target, viewname);
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing %s '%s' in all cache views "
"succeeded",
tree ? "tree" : "name", target);
}
result = ISC_R_SUCCESS;
} else {
if (!found) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing %s '%s' in cache view '%s' "
"failed: view not found",
tree ? "tree" : "name", target, viewname);
}
result = ISC_R_FAILURE;
}
isc_task_endexclusive(server->task);
return (result);
}
isc_result_t
named_server_status(named_server_t *server, isc_buffer_t **text) {
isc_result_t result;
unsigned int zonecount, xferrunning, xferdeferred, soaqueries;
unsigned int automatic;
const char *ob = "", *cb = "", *alt = "";
char boottime[ISC_FORMATHTTPTIMESTAMP_SIZE];
char configtime[ISC_FORMATHTTPTIMESTAMP_SIZE];
char line[1024], hostname[256];
if (named_g_server->version_set) {
ob = " (";
cb = ")";
if (named_g_server->version == NULL) {
alt = "version.bind/txt/ch disabled";
} else {
alt = named_g_server->version;
}
}
zonecount = dns_zonemgr_getcount(server->zonemgr, DNS_ZONESTATE_ANY);
xferrunning = dns_zonemgr_getcount(server->zonemgr,
DNS_ZONESTATE_XFERRUNNING);
xferdeferred = dns_zonemgr_getcount(server->zonemgr,
DNS_ZONESTATE_XFERDEFERRED);
soaqueries = dns_zonemgr_getcount(server->zonemgr,
DNS_ZONESTATE_SOAQUERY);
automatic = dns_zonemgr_getcount(server->zonemgr,
DNS_ZONESTATE_AUTOMATIC);
isc_time_formathttptimestamp(&named_g_boottime, boottime,
sizeof(boottime));
isc_time_formathttptimestamp(&named_g_configtime, configtime,
sizeof(configtime));
snprintf(line, sizeof(line), "version: %s %s%s%s <id:%s>%s%s%s\n",
named_g_product, named_g_version,
(*named_g_description != '\0') ? " " : "", named_g_description,
named_g_srcid, ob, alt, cb);
CHECK(putstr(text, line));
result = named_os_gethostname(hostname, sizeof(hostname));
if (result != ISC_R_SUCCESS) {
strlcpy(hostname, "localhost", sizeof(hostname));
}
snprintf(line, sizeof(line), "running on %s: %s\n", hostname,
named_os_uname());
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "boot time: %s\n", boottime);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "last configured: %s\n", configtime);
CHECK(putstr(text, line));
if (named_g_chrootdir != NULL) {
snprintf(line, sizeof(line), "configuration file: %s (%s%s)\n",
named_g_conffile, named_g_chrootdir, named_g_conffile);
} else {
snprintf(line, sizeof(line), "configuration file: %s\n",
named_g_conffile);
}
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "CPUs found: %u\n", named_g_cpus_detected);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "worker threads: %u\n", named_g_cpus);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "UDP listeners per interface: %u\n",
named_g_udpdisp);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "number of zones: %u (%u automatic)\n",
zonecount, automatic);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "debug level: %u\n", named_g_debuglevel);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "xfers running: %u\n", xferrunning);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "xfers deferred: %u\n", xferdeferred);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "soa queries in progress: %u\n",
soaqueries);
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "query logging is %s\n",
ns_server_getoption(server->sctx, NS_SERVER_LOGQUERIES)
? "ON"
: "OFF");
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "recursive clients: %u/%u/%u\n",
isc_quota_getused(&server->sctx->recursionquota),
isc_quota_getsoft(&server->sctx->recursionquota),
isc_quota_getmax(&server->sctx->recursionquota));
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "tcp clients: %u/%u\n",
isc_quota_getused(&server->sctx->tcpquota),
isc_quota_getmax(&server->sctx->tcpquota));
CHECK(putstr(text, line));
snprintf(line, sizeof(line), "TCP high-water: %u\n",
(unsigned)ns_stats_get_counter(server->sctx->nsstats,
ns_statscounter_tcphighwater));
CHECK(putstr(text, line));
if (server->reload_status != NAMED_RELOAD_DONE) {
snprintf(line, sizeof(line), "reload/reconfig %s\n",
(server->reload_status == NAMED_RELOAD_FAILED
? "failed"
: "in progress"));
CHECK(putstr(text, line));
}
CHECK(putstr(text, "server is up and running"));
CHECK(putnull(text));
return (ISC_R_SUCCESS);
cleanup:
return (result);
}
isc_result_t
named_server_testgen(isc_lex_t *lex, isc_buffer_t **text) {
isc_result_t result;
char *ptr;
unsigned long count;
unsigned long i;
const unsigned char chars[] = "abcdefghijklmnopqrstuvwxyz0123456789";
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
ptr = next_token(lex, text);
if (ptr == NULL) {
count = 26;
} else {
count = strtoul(ptr, NULL, 10);
}
CHECK(isc_buffer_reserve(text, count));
for (i = 0; i < count; i++) {
CHECK(putuint8(text, chars[i % (sizeof(chars) - 1)]));
}
CHECK(putnull(text));
cleanup:
return (result);
}
static isc_result_t
delete_keynames(dns_tsig_keyring_t *ring, char *target,
unsigned int *foundkeys) {
char namestr[DNS_NAME_FORMATSIZE];
isc_result_t result;
dns_rbtnodechain_t chain;
dns_name_t foundname;
dns_fixedname_t fixedorigin;
dns_name_t *origin;
dns_rbtnode_t *node;
dns_tsigkey_t *tkey;
dns_name_init(&foundname, NULL);
origin = dns_fixedname_initname(&fixedorigin);
again:
dns_rbtnodechain_init(&chain);
result = dns_rbtnodechain_first(&chain, ring->keys, &foundname, origin);
if (result == ISC_R_NOTFOUND) {
dns_rbtnodechain_invalidate(&chain);
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
dns_rbtnodechain_invalidate(&chain);
return (result);
}
for (;;) {
node = NULL;
dns_rbtnodechain_current(&chain, &foundname, origin, &node);
tkey = node->data;
if (tkey != NULL) {
if (!tkey->generated) {
goto nextkey;
}
dns_name_format(&tkey->name, namestr, sizeof(namestr));
if (strcmp(namestr, target) == 0) {
(*foundkeys)++;
dns_rbtnodechain_invalidate(&chain);
(void)dns_rbt_deletename(ring->keys,
&tkey->name, false);
goto again;
}
}
nextkey:
result = dns_rbtnodechain_next(&chain, &foundname, origin);
if (result == ISC_R_NOMORE) {
break;
}
if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
dns_rbtnodechain_invalidate(&chain);
return (result);
}
}
return (ISC_R_SUCCESS);
}
isc_result_t
named_server_tsigdelete(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result;
dns_view_t *view;
unsigned int foundkeys = 0;
char *ptr, *viewname;
char target[DNS_NAME_FORMATSIZE];
char fbuf[16];
(void)next_token(lex, text); /* skip command name */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
strlcpy(target, ptr, DNS_NAME_FORMATSIZE);
viewname = next_token(lex, text);
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (viewname == NULL || strcmp(view->name, viewname) == 0) {
RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_write);
result = delete_keynames(view->dynamickeys, target,
&foundkeys);
RWUNLOCK(&view->dynamickeys->lock,
isc_rwlocktype_write);
if (result != ISC_R_SUCCESS) {
isc_task_endexclusive(server->task);
return (result);
}
}
}
isc_task_endexclusive(server->task);
snprintf(fbuf, sizeof(fbuf), "%u", foundkeys);
CHECK(putstr(text, fbuf));
CHECK(putstr(text, " tsig keys deleted."));
CHECK(putnull(text));
cleanup:
return (result);
}
static isc_result_t
list_keynames(dns_view_t *view, dns_tsig_keyring_t *ring, isc_buffer_t **text,
unsigned int *foundkeys) {
char namestr[DNS_NAME_FORMATSIZE];
char creatorstr[DNS_NAME_FORMATSIZE];
isc_result_t result;
dns_rbtnodechain_t chain;
dns_name_t foundname;
dns_fixedname_t fixedorigin;
dns_name_t *origin;
dns_rbtnode_t *node;
dns_tsigkey_t *tkey;
const char *viewname;
if (view != NULL) {
viewname = view->name;
} else {
viewname = "(global)";
}
dns_name_init(&foundname, NULL);
origin = dns_fixedname_initname(&fixedorigin);
dns_rbtnodechain_init(&chain);
result = dns_rbtnodechain_first(&chain, ring->keys, &foundname, origin);
if (result == ISC_R_NOTFOUND) {
dns_rbtnodechain_invalidate(&chain);
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
dns_rbtnodechain_invalidate(&chain);
return (result);
}
for (;;) {
node = NULL;
dns_rbtnodechain_current(&chain, &foundname, origin, &node);
tkey = node->data;
if (tkey != NULL) {
dns_name_format(&tkey->name, namestr, sizeof(namestr));
if (tkey->generated) {
dns_name_format(tkey->creator, creatorstr,
sizeof(creatorstr));
if (*foundkeys != 0) {
CHECK(putstr(text, "\n"));
}
CHECK(putstr(text, "view \""));
CHECK(putstr(text, viewname));
CHECK(putstr(text, "\"; type \"dynamic\"; key "
"\""));
CHECK(putstr(text, namestr));
CHECK(putstr(text, "\"; creator \""));
CHECK(putstr(text, creatorstr));
CHECK(putstr(text, "\";"));
} else {
if (*foundkeys != 0) {
CHECK(putstr(text, "\n"));
}
CHECK(putstr(text, "view \""));
CHECK(putstr(text, viewname));
CHECK(putstr(text, "\"; type \"static\"; key "
"\""));
CHECK(putstr(text, namestr));
CHECK(putstr(text, "\";"));
}
(*foundkeys)++;
}
result = dns_rbtnodechain_next(&chain, &foundname, origin);
if (result == ISC_R_NOMORE || result == DNS_R_NEWORIGIN) {
break;
}
}
return (ISC_R_SUCCESS);
cleanup:
dns_rbtnodechain_invalidate(&chain);
return (result);
}
isc_result_t
named_server_tsiglist(named_server_t *server, isc_buffer_t **text) {
isc_result_t result;
dns_view_t *view;
unsigned int foundkeys = 0;
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
RWLOCK(&view->statickeys->lock, isc_rwlocktype_read);
result = list_keynames(view, view->statickeys, text,
&foundkeys);
RWUNLOCK(&view->statickeys->lock, isc_rwlocktype_read);
if (result != ISC_R_SUCCESS) {
isc_task_endexclusive(server->task);
return (result);
}
RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
result = list_keynames(view, view->dynamickeys, text,
&foundkeys);
RWUNLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
if (result != ISC_R_SUCCESS) {
isc_task_endexclusive(server->task);
return (result);
}
}
isc_task_endexclusive(server->task);
if (foundkeys == 0) {
CHECK(putstr(text, "no tsig keys found."));
}
if (isc_buffer_usedlength(*text) > 0) {
CHECK(putnull(text));
}
cleanup:
return (result);
}
/*
* Act on a "sign" or "loadkeys" command from the command channel.
*/
isc_result_t
named_server_rekey(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result;
dns_zone_t *zone = NULL;
dns_zonetype_t type;
uint16_t keyopts;
bool fullsign = false;
char *ptr;
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (strcasecmp(ptr, NAMED_COMMAND_SIGN) == 0) {
fullsign = true;
}
result = zone_from_args(server, lex, NULL, &zone, NULL, text, false);
if (result != ISC_R_SUCCESS) {
return (result);
}
if (zone == NULL) {
return (ISC_R_UNEXPECTEDEND); /* XXX: or do all zones? */
}
type = dns_zone_gettype(zone);
if (type != dns_zone_master) {
dns_zone_detach(&zone);
return (DNS_R_NOTMASTER);
}
keyopts = dns_zone_getkeyopts(zone);
/*
* "rndc loadkeys" requires "auto-dnssec maintain"
* or a "dnssec-policy".
*/
if ((keyopts & DNS_ZONEKEY_ALLOW) == 0) {
result = ISC_R_NOPERM;
} else if ((keyopts & DNS_ZONEKEY_MAINTAIN) == 0 && !fullsign) {
result = ISC_R_NOPERM;
} else {
dns_zone_rekey(zone, fullsign);
}
dns_zone_detach(&zone);
return (result);
}
/*
* Act on a "sync" command from the command channel.
*/
static isc_result_t
synczone(dns_zone_t *zone, void *uap) {
bool cleanup = *(bool *)uap;
isc_result_t result;
dns_zone_t *raw = NULL;
char *journal;
dns_zone_getraw(zone, &raw);
if (raw != NULL) {
synczone(raw, uap);
dns_zone_detach(&raw);
}
result = dns_zone_flush(zone);
if (result != ISC_R_SUCCESS) {
cleanup = false;
}
if (cleanup) {
journal = dns_zone_getjournal(zone);
if (journal != NULL) {
(void)isc_file_remove(journal);
}
}
return (result);
}
isc_result_t
named_server_sync(named_server_t *server, isc_lex_t *lex, isc_buffer_t **text) {
isc_result_t result, tresult;
dns_view_t *view;
dns_zone_t *zone = NULL;
char classstr[DNS_RDATACLASS_FORMATSIZE];
char zonename[DNS_NAME_FORMATSIZE];
const char *vname, *sep, *arg;
bool cleanup = false;
(void)next_token(lex, text);
arg = next_token(lex, text);
if (arg != NULL &&
(strcmp(arg, "-clean") == 0 || strcmp(arg, "-clear") == 0)) {
cleanup = true;
arg = next_token(lex, text);
}
result = zone_from_args(server, lex, arg, &zone, NULL, text, false);
if (result != ISC_R_SUCCESS) {
return (result);
}
if (zone == NULL) {
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
tresult = ISC_R_SUCCESS;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
result = dns_zt_apply(view->zonetable, false, NULL,
synczone, &cleanup);
if (result != ISC_R_SUCCESS && tresult == ISC_R_SUCCESS)
{
tresult = result;
}
}
isc_task_endexclusive(server->task);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumping all zones%s: %s",
cleanup ? ", removing journal files" : "",
isc_result_totext(result));
return (tresult);
}
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = synczone(zone, &cleanup);
isc_task_endexclusive(server->task);
view = dns_zone_getview(zone);
if (strcmp(view->name, "_default") == 0 ||
strcmp(view->name, "_bind") == 0) {
vname = "";
sep = "";
} else {
vname = view->name;
sep = " ";
}
dns_rdataclass_format(dns_zone_getclass(zone), classstr,
sizeof(classstr));
dns_name_format(dns_zone_getorigin(zone), zonename, sizeof(zonename));
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL, NAMED_LOGMODULE_SERVER,
ISC_LOG_INFO, "sync: dumping zone '%s/%s'%s%s%s: %s", zonename,
classstr, sep, vname, cleanup ? ", removing journal file" : "",
isc_result_totext(result));
dns_zone_detach(&zone);
return (result);
}
/*
* Act on a "freeze" or "thaw" command from the command channel.
*/
isc_result_t
named_server_freeze(named_server_t *server, bool freeze, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result, tresult;
dns_zone_t *mayberaw = NULL, *raw = NULL;
dns_zonetype_t type;
char classstr[DNS_RDATACLASS_FORMATSIZE];
char zonename[DNS_NAME_FORMATSIZE];
dns_view_t *view;
const char *vname, *sep;
bool frozen;
const char *msg = NULL;
result = zone_from_args(server, lex, NULL, &mayberaw, NULL, text, true);
if (result != ISC_R_SUCCESS) {
return (result);
}
if (mayberaw == NULL) {
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
tresult = ISC_R_SUCCESS;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
result = dns_view_freezezones(view, freeze);
if (result != ISC_R_SUCCESS && tresult == ISC_R_SUCCESS)
{
tresult = result;
}
}
isc_task_endexclusive(server->task);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"%s all zones: %s",
freeze ? "freezing" : "thawing",
isc_result_totext(tresult));
return (tresult);
}
dns_zone_getraw(mayberaw, &raw);
if (raw != NULL) {
dns_zone_detach(&mayberaw);
dns_zone_attach(raw, &mayberaw);
dns_zone_detach(&raw);
}
type = dns_zone_gettype(mayberaw);
if (type != dns_zone_master) {
dns_zone_detach(&mayberaw);
return (DNS_R_NOTMASTER);
}
if (freeze && !dns_zone_isdynamic(mayberaw, true)) {
dns_zone_detach(&mayberaw);
return (DNS_R_NOTDYNAMIC);
}
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
frozen = dns_zone_getupdatedisabled(mayberaw);
if (freeze) {
if (frozen) {
msg = "WARNING: The zone was already frozen.\n"
"Someone else may be editing it or "
"it may still be re-loading.";
result = DNS_R_FROZEN;
}
if (result == ISC_R_SUCCESS) {
result = dns_zone_flush(mayberaw);
if (result != ISC_R_SUCCESS) {
msg = "Flushing the zone updates to "
"disk failed.";
}
}
if (result == ISC_R_SUCCESS) {
dns_zone_setupdatedisabled(mayberaw, freeze);
}
} else {
if (frozen) {
result = dns_zone_loadandthaw(mayberaw);
switch (result) {
case ISC_R_SUCCESS:
case DNS_R_UPTODATE:
msg = "The zone reload and thaw was "
"successful.";
result = ISC_R_SUCCESS;
break;
case DNS_R_CONTINUE:
msg = "A zone reload and thaw was started.\n"
"Check the logs to see the result.";
result = ISC_R_SUCCESS;
break;
}
}
}
isc_task_endexclusive(server->task);
if (msg != NULL) {
(void)putstr(text, msg);
(void)putnull(text);
}
view = dns_zone_getview(mayberaw);
if (strcmp(view->name, "_default") == 0 ||
strcmp(view->name, "_bind") == 0) {
vname = "";
sep = "";
} else {
vname = view->name;
sep = " ";
}
dns_rdataclass_format(dns_zone_getclass(mayberaw), classstr,
sizeof(classstr));
dns_name_format(dns_zone_getorigin(mayberaw), zonename,
sizeof(zonename));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"%s zone '%s/%s'%s%s: %s",
freeze ? "freezing" : "thawing", zonename, classstr, sep,
vname, isc_result_totext(result));
dns_zone_detach(&mayberaw);
return (result);
}
#ifdef HAVE_LIBSCF
/*
* This function adds a message for rndc to echo if named
* is managed by smf and is also running chroot.
*/
isc_result_t
named_smf_add_message(isc_buffer_t **text) {
return (putstr(text, "use svcadm(1M) to manage named"));
}
#endif /* HAVE_LIBSCF */
#ifndef HAVE_LMDB
/*
* Emit a comment at the top of the nzf file containing the viewname
* Expects the fp to already be open for writing
*/
#define HEADER1 "# New zone file for view: "
#define HEADER2 \
"\n# This file contains configuration for zones added by\n" \
"# the 'rndc addzone' command. DO NOT EDIT BY HAND.\n"
static isc_result_t
add_comment(FILE *fp, const char *viewname) {
isc_result_t result;
CHECK(isc_stdio_write(HEADER1, sizeof(HEADER1) - 1, 1, fp, NULL));
CHECK(isc_stdio_write(viewname, strlen(viewname), 1, fp, NULL));
CHECK(isc_stdio_write(HEADER2, sizeof(HEADER2) - 1, 1, fp, NULL));
cleanup:
return (result);
}
static void
dumpzone(void *arg, const char *buf, int len) {
FILE *fp = arg;
(void)isc_stdio_write(buf, len, 1, fp, NULL);
}
static isc_result_t
nzf_append(dns_view_t *view, const cfg_obj_t *zconfig) {
isc_result_t result;
off_t offset;
FILE *fp = NULL;
bool offsetok = false;
LOCK(&view->new_zone_lock);
CHECK(isc_stdio_open(view->new_zone_file, "a", &fp));
CHECK(isc_stdio_seek(fp, 0, SEEK_END));
CHECK(isc_stdio_tell(fp, &offset));
offsetok = true;
if (offset == 0) {
CHECK(add_comment(fp, view->name));
}
CHECK(isc_stdio_write("zone ", 5, 1, fp, NULL));
cfg_printx(zconfig, CFG_PRINTER_ONELINE, dumpzone, fp);
CHECK(isc_stdio_write(";\n", 2, 1, fp, NULL));
CHECK(isc_stdio_flush(fp));
result = isc_stdio_close(fp);
fp = NULL;
cleanup:
if (fp != NULL) {
(void)isc_stdio_close(fp);
if (offsetok) {
isc_result_t result2;
result2 = isc_file_truncate(view->new_zone_file,
offset);
if (result2 != ISC_R_SUCCESS) {
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error truncating NZF file '%s' "
"during rollback from append: "
"%s",
view->new_zone_file,
isc_result_totext(result2));
}
}
}
UNLOCK(&view->new_zone_lock);
return (result);
}
static isc_result_t
nzf_writeconf(const cfg_obj_t *config, dns_view_t *view) {
const cfg_obj_t *zl = NULL;
cfg_list_t *list;
const cfg_listelt_t *elt;
FILE *fp = NULL;
char tmp[1024];
isc_result_t result;
result = isc_file_template(view->new_zone_file, "nzf-XXXXXXXX", tmp,
sizeof(tmp));
if (result == ISC_R_SUCCESS) {
result = isc_file_openunique(tmp, &fp);
}
if (result != ISC_R_SUCCESS) {
return (result);
}
cfg_map_get(config, "zone", &zl);
if (!cfg_obj_islist(zl)) {
CHECK(ISC_R_FAILURE);
}
DE_CONST(&zl->value.list, list);
CHECK(add_comment(fp, view->name)); /* force a comment */
for (elt = ISC_LIST_HEAD(*list); elt != NULL;
elt = ISC_LIST_NEXT(elt, link)) {
const cfg_obj_t *zconfig = cfg_listelt_value(elt);
CHECK(isc_stdio_write("zone ", 5, 1, fp, NULL));
cfg_printx(zconfig, CFG_PRINTER_ONELINE, dumpzone, fp);
CHECK(isc_stdio_write(";\n", 2, 1, fp, NULL));
}
CHECK(isc_stdio_flush(fp));
result = isc_stdio_close(fp);
fp = NULL;
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
CHECK(isc_file_rename(tmp, view->new_zone_file));
return (result);
cleanup:
if (fp != NULL) {
(void)isc_stdio_close(fp);
}
(void)isc_file_remove(tmp);
return (result);
}
#else /* HAVE_LMDB */
static void
nzd_setkey(MDB_val *key, dns_name_t *name, char *namebuf, size_t buflen) {
dns_fixedname_t fixed;
dns_fixedname_init(&fixed);
dns_name_downcase(name, dns_fixedname_name(&fixed), NULL);
dns_name_format(dns_fixedname_name(&fixed), namebuf, buflen);
key->mv_data = namebuf;
key->mv_size = strlen(namebuf);
}
static void
dumpzone(void *arg, const char *buf, int len) {
ns_dzarg_t *dzarg = arg;
isc_result_t result;
REQUIRE(dzarg != NULL && ISC_MAGIC_VALID(dzarg, DZARG_MAGIC));
result = putmem(dzarg->text, buf, len);
if (result != ISC_R_SUCCESS && dzarg->result == ISC_R_SUCCESS) {
dzarg->result = result;
}
}
static isc_result_t
nzd_save(MDB_txn **txnp, MDB_dbi dbi, dns_zone_t *zone,
const cfg_obj_t *zconfig) {
isc_result_t result;
int status;
dns_view_t *view;
bool commit = false;
isc_buffer_t *text = NULL;
char namebuf[1024];
MDB_val key, data;
ns_dzarg_t dzarg;
view = dns_zone_getview(zone);
nzd_setkey(&key, dns_zone_getorigin(zone), namebuf, sizeof(namebuf));
LOCK(&view->new_zone_lock);
if (zconfig == NULL) {
/* We're deleting the zone from the database */
status = mdb_del(*txnp, dbi, &key, NULL);
if (status != MDB_SUCCESS && status != MDB_NOTFOUND) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error deleting zone %s "
"from NZD database: %s",
namebuf, mdb_strerror(status));
result = ISC_R_FAILURE;
goto cleanup;
} else if (status != MDB_NOTFOUND) {
commit = true;
}
} else {
/* We're creating or overwriting the zone */
const cfg_obj_t *zoptions;
isc_buffer_allocate(view->mctx, &text, 256);
zoptions = cfg_tuple_get(zconfig, "options");
if (zoptions == NULL) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Unable to get options from config in "
"nzd_save()");
result = ISC_R_FAILURE;
goto cleanup;
}
dzarg.magic = DZARG_MAGIC;
dzarg.text = &text;
dzarg.result = ISC_R_SUCCESS;
cfg_printx(zoptions, CFG_PRINTER_ONELINE, dumpzone, &dzarg);
if (dzarg.result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error writing zone config to "
"buffer in nzd_save(): %s",
isc_result_totext(dzarg.result));
result = dzarg.result;
goto cleanup;
}
data.mv_data = isc_buffer_base(text);
data.mv_size = isc_buffer_usedlength(text);
status = mdb_put(*txnp, dbi, &key, &data, 0);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error inserting zone in "
"NZD database: %s",
mdb_strerror(status));
result = ISC_R_FAILURE;
goto cleanup;
}
commit = true;
}
result = ISC_R_SUCCESS;
cleanup:
if (!commit || result != ISC_R_SUCCESS) {
(void)mdb_txn_abort(*txnp);
} else {
status = mdb_txn_commit(*txnp);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error committing "
"NZD database: %s",
mdb_strerror(status));
result = ISC_R_FAILURE;
}
}
*txnp = NULL;
UNLOCK(&view->new_zone_lock);
if (text != NULL) {
isc_buffer_free(&text);
}
return (result);
}
static isc_result_t
nzd_writable(dns_view_t *view) {
isc_result_t result = ISC_R_SUCCESS;
int status;
MDB_dbi dbi;
MDB_txn *txn = NULL;
REQUIRE(view != NULL);
status = mdb_txn_begin((MDB_env *)view->new_zone_dbenv, 0, 0, &txn);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"mdb_txn_begin: %s", mdb_strerror(status));
return (ISC_R_FAILURE);
}
status = mdb_dbi_open(txn, NULL, 0, &dbi);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"mdb_dbi_open: %s", mdb_strerror(status));
result = ISC_R_FAILURE;
}
mdb_txn_abort(txn);
return (result);
}
static isc_result_t
nzd_open(dns_view_t *view, unsigned int flags, MDB_txn **txnp, MDB_dbi *dbi) {
int status;
MDB_txn *txn = NULL;
REQUIRE(view != NULL);
REQUIRE(txnp != NULL && *txnp == NULL);
REQUIRE(dbi != NULL);
status = mdb_txn_begin((MDB_env *)view->new_zone_dbenv, 0, flags, &txn);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"mdb_txn_begin: %s", mdb_strerror(status));
goto cleanup;
}
status = mdb_dbi_open(txn, NULL, 0, dbi);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"mdb_dbi_open: %s", mdb_strerror(status));
goto cleanup;
}
*txnp = txn;
cleanup:
if (status != MDB_SUCCESS) {
if (txn != NULL) {
mdb_txn_abort(txn);
}
return (ISC_R_FAILURE);
}
return (ISC_R_SUCCESS);
}
/*
* nzd_env_close() and nzd_env_reopen are a kluge to address the
* problem of an NZD file possibly being created before we drop
* root privileges.
*/
static void
nzd_env_close(dns_view_t *view) {
const char *dbpath = NULL;
char dbpath_copy[PATH_MAX];
char lockpath[PATH_MAX];
int status, ret;
if (view->new_zone_dbenv == NULL) {
return;
}
status = mdb_env_get_path(view->new_zone_dbenv, &dbpath);
INSIST(status == MDB_SUCCESS);
snprintf(lockpath, sizeof(lockpath), "%s-lock", dbpath);
strlcpy(dbpath_copy, dbpath, sizeof(dbpath_copy));
mdb_env_close((MDB_env *)view->new_zone_dbenv);
/*
* Database files must be owned by the eventual user, not by root.
*/
ret = chown(dbpath_copy, ns_os_uid(), -1);
UNUSED(ret);
/*
* Some platforms need the lockfile not to exist when we reopen the
* environment.
*/
(void)isc_file_remove(lockpath);
view->new_zone_dbenv = NULL;
}
static isc_result_t
nzd_env_reopen(dns_view_t *view) {
isc_result_t result;
MDB_env *env = NULL;
int status;
if (view->new_zone_db == NULL) {
return (ISC_R_SUCCESS);
}
nzd_env_close(view);
status = mdb_env_create(&env);
if (status != MDB_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_OTHER, ISC_LOG_ERROR,
"mdb_env_create failed: %s",
mdb_strerror(status));
CHECK(ISC_R_FAILURE);
}
if (view->new_zone_mapsize != 0ULL) {
status = mdb_env_set_mapsize(env, view->new_zone_mapsize);
if (status != MDB_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_OTHER, ISC_LOG_ERROR,
"mdb_env_set_mapsize failed: %s",
mdb_strerror(status));
CHECK(ISC_R_FAILURE);
}
}
status = mdb_env_open(env, view->new_zone_db, DNS_LMDB_FLAGS, 0600);
if (status != MDB_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_OTHER, ISC_LOG_ERROR,
"mdb_env_open of '%s' failed: %s",
view->new_zone_db, mdb_strerror(status));
CHECK(ISC_R_FAILURE);
}
view->new_zone_dbenv = env;
env = NULL;
result = ISC_R_SUCCESS;
cleanup:
if (env != NULL) {
mdb_env_close(env);
}
return (result);
}
static isc_result_t
nzd_close(MDB_txn **txnp, bool commit) {
isc_result_t result = ISC_R_SUCCESS;
int status;
REQUIRE(txnp != NULL);
if (*txnp != NULL) {
if (commit) {
status = mdb_txn_commit(*txnp);
if (status != MDB_SUCCESS) {
result = ISC_R_FAILURE;
}
} else {
mdb_txn_abort(*txnp);
}
*txnp = NULL;
}
return (result);
}
static isc_result_t
nzd_count(dns_view_t *view, int *countp) {
isc_result_t result;
int status;
MDB_txn *txn = NULL;
MDB_dbi dbi;
MDB_stat statbuf;
REQUIRE(countp != NULL);
result = nzd_open(view, MDB_RDONLY, &txn, &dbi);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
status = mdb_stat(txn, dbi, &statbuf);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"mdb_stat: %s", mdb_strerror(status));
result = ISC_R_FAILURE;
goto cleanup;
}
*countp = statbuf.ms_entries;
cleanup:
(void)nzd_close(&txn, false);
return (result);
}
static isc_result_t
migrate_nzf(dns_view_t *view) {
isc_result_t result;
cfg_obj_t *nzf_config = NULL;
int status, n;
isc_buffer_t *text = NULL;
bool commit = false;
const cfg_obj_t *zonelist;
const cfg_listelt_t *element;
char tempname[PATH_MAX];
MDB_txn *txn = NULL;
MDB_dbi dbi;
MDB_val key, data;
ns_dzarg_t dzarg;
/*
* If NZF file doesn't exist, or NZD DB exists and already
* has data, return without attempting migration.
*/
if (!isc_file_exists(view->new_zone_file)) {
result = ISC_R_SUCCESS;
goto cleanup;
}
result = nzd_count(view, &n);
if (result == ISC_R_SUCCESS && n > 0) {
result = ISC_R_SUCCESS;
goto cleanup;
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"Migrating zones from NZF file '%s' to "
"NZD database '%s'",
view->new_zone_file, view->new_zone_db);
/*
* Instead of blindly copying lines, we parse the NZF file using
* the configuration parser, because it validates it against the
* config type, giving us a guarantee that valid configuration
* will be written to DB.
*/
cfg_parser_reset(named_g_addparser);
result = cfg_parse_file(named_g_addparser, view->new_zone_file,
&cfg_type_addzoneconf, &nzf_config);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error parsing NZF file '%s': %s",
view->new_zone_file, isc_result_totext(result));
goto cleanup;
}
zonelist = NULL;
CHECK(cfg_map_get(nzf_config, "zone", &zonelist));
if (!cfg_obj_islist(zonelist)) {
CHECK(ISC_R_FAILURE);
}
CHECK(nzd_open(view, 0, &txn, &dbi));
isc_buffer_allocate(view->mctx, &text, 256);
for (element = cfg_list_first(zonelist); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *zconfig;
const cfg_obj_t *zoptions;
char zname[DNS_NAME_FORMATSIZE];
dns_fixedname_t fname;
dns_name_t *name;
const char *origin;
isc_buffer_t b;
zconfig = cfg_listelt_value(element);
origin = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
if (origin == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
/* Normalize zone name */
isc_buffer_constinit(&b, origin, strlen(origin));
isc_buffer_add(&b, strlen(origin));
name = dns_fixedname_initname(&fname);
CHECK(dns_name_fromtext(name, &b, dns_rootname,
DNS_NAME_DOWNCASE, NULL));
dns_name_format(name, zname, sizeof(zname));
key.mv_data = zname;
key.mv_size = strlen(zname);
zoptions = cfg_tuple_get(zconfig, "options");
if (zoptions == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
isc_buffer_clear(text);
dzarg.magic = DZARG_MAGIC;
dzarg.text = &text;
dzarg.result = ISC_R_SUCCESS;
cfg_printx(zoptions, CFG_PRINTER_ONELINE, dumpzone, &dzarg);
if (dzarg.result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error writing zone config to "
"buffer in migrate_nzf(): %s",
isc_result_totext(result));
result = dzarg.result;
goto cleanup;
}
data.mv_data = isc_buffer_base(text);
data.mv_size = isc_buffer_usedlength(text);
status = mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE);
if (status != MDB_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"Error inserting zone in "
"NZD database: %s",
mdb_strerror(status));
result = ISC_R_FAILURE;
goto cleanup;
}
commit = true;
}
result = ISC_R_SUCCESS;
/*
* Leaving the NZF file in place is harmless as we won't use it
* if an NZD database is found for the view. But we rename NZF file
* to a backup name here.
*/
strlcpy(tempname, view->new_zone_file, sizeof(tempname));
if (strlen(tempname) < sizeof(tempname) - 1) {
strlcat(tempname, "~", sizeof(tempname));
isc_file_rename(view->new_zone_file, tempname);
}
cleanup:
if (result != ISC_R_SUCCESS) {
(void)nzd_close(&txn, false);
} else {
result = nzd_close(&txn, commit);
}
if (text != NULL) {
isc_buffer_free(&text);
}
if (nzf_config != NULL) {
cfg_obj_destroy(named_g_addparser, &nzf_config);
}
return (result);
}
#endif /* HAVE_LMDB */
static isc_result_t
newzone_parse(named_server_t *server, char *command, dns_view_t **viewp,
cfg_obj_t **zoneconfp, const cfg_obj_t **zoneobjp,
bool *redirectp, isc_buffer_t **text) {
isc_result_t result;
isc_buffer_t argbuf;
bool redirect = false;
cfg_obj_t *zoneconf = NULL;
const cfg_obj_t *zlist = NULL;
const cfg_obj_t *zoneobj = NULL;
const cfg_obj_t *zoptions = NULL;
const cfg_obj_t *obj = NULL;
const char *viewname = NULL;
dns_rdataclass_t rdclass;
dns_view_t *view = NULL;
const char *bn = NULL;
REQUIRE(viewp != NULL && *viewp == NULL);
REQUIRE(zoneobjp != NULL && *zoneobjp == NULL);
REQUIRE(zoneconfp != NULL && *zoneconfp == NULL);
REQUIRE(redirectp != NULL);
/* Try to parse the argument string */
isc_buffer_init(&argbuf, command, (unsigned int)strlen(command));
isc_buffer_add(&argbuf, strlen(command));
if (strncasecmp(command, "add", 3) == 0) {
bn = "addzone";
} else if (strncasecmp(command, "mod", 3) == 0) {
bn = "modzone";
} else {
INSIST(0);
ISC_UNREACHABLE();
}
/*
* Convert the "addzone" or "modzone" to just "zone", for
* the benefit of the parser
*/
isc_buffer_forward(&argbuf, 3);
cfg_parser_reset(named_g_addparser);
CHECK(cfg_parse_buffer(named_g_addparser, &argbuf, bn, 0,
&cfg_type_addzoneconf, 0, &zoneconf));
CHECK(cfg_map_get(zoneconf, "zone", &zlist));
if (!cfg_obj_islist(zlist)) {
CHECK(ISC_R_FAILURE);
}
/* For now we only support adding one zone at a time */
zoneobj = cfg_listelt_value(cfg_list_first(zlist));
/* Check the zone type for ones that are not supported by addzone. */
zoptions = cfg_tuple_get(zoneobj, "options");
obj = NULL;
(void)cfg_map_get(zoptions, "type", &obj);
if (obj == NULL) {
(void)cfg_map_get(zoptions, "in-view", &obj);
if (obj != NULL) {
(void)putstr(text, "'in-view' zones not supported by ");
(void)putstr(text, bn);
} else {
(void)putstr(text, "zone type not specified");
}
CHECK(ISC_R_FAILURE);
}
if (strcasecmp(cfg_obj_asstring(obj), "hint") == 0 ||
strcasecmp(cfg_obj_asstring(obj), "forward") == 0 ||
strcasecmp(cfg_obj_asstring(obj), "delegation-only") == 0)
{
(void)putstr(text, "'");
(void)putstr(text, cfg_obj_asstring(obj));
(void)putstr(text, "' zones not supported by ");
(void)putstr(text, bn);
CHECK(ISC_R_FAILURE);
}
if (strcasecmp(cfg_obj_asstring(obj), "redirect") == 0) {
redirect = true;
}
/* Make sense of optional class argument */
obj = cfg_tuple_get(zoneobj, "class");
CHECK(named_config_getclass(obj, dns_rdataclass_in, &rdclass));
/* Make sense of optional view argument */
obj = cfg_tuple_get(zoneobj, "view");
if (obj && cfg_obj_isstring(obj)) {
viewname = cfg_obj_asstring(obj);
}
if (viewname == NULL || *viewname == '\0') {
viewname = "_default";
}
result = dns_viewlist_find(&server->viewlist, viewname, rdclass, &view);
if (result == ISC_R_NOTFOUND) {
(void)putstr(text, "no matching view found for '");
(void)putstr(text, viewname);
(void)putstr(text, "'");
goto cleanup;
} else if (result != ISC_R_SUCCESS) {
goto cleanup;
}
*viewp = view;
*zoneobjp = zoneobj;
*zoneconfp = zoneconf;
*redirectp = redirect;
return (ISC_R_SUCCESS);
cleanup:
if (zoneconf != NULL) {
cfg_obj_destroy(named_g_addparser, &zoneconf);
}
if (view != NULL) {
dns_view_detach(&view);
}
return (result);
}
static isc_result_t
delete_zoneconf(dns_view_t *view, cfg_parser_t *pctx, const cfg_obj_t *config,
const dns_name_t *zname, nzfwriter_t nzfwriter) {
isc_result_t result = ISC_R_NOTFOUND;
const cfg_listelt_t *elt = NULL;
const cfg_obj_t *zl = NULL;
cfg_list_t *list;
dns_fixedname_t myfixed;
dns_name_t *myname;
REQUIRE(view != NULL);
REQUIRE(pctx != NULL);
REQUIRE(config != NULL);
REQUIRE(zname != NULL);
LOCK(&view->new_zone_lock);
cfg_map_get(config, "zone", &zl);
if (!cfg_obj_islist(zl)) {
CHECK(ISC_R_FAILURE);
}
DE_CONST(&zl->value.list, list);
myname = dns_fixedname_initname(&myfixed);
for (elt = ISC_LIST_HEAD(*list); elt != NULL;
elt = ISC_LIST_NEXT(elt, link)) {
const cfg_obj_t *zconf = cfg_listelt_value(elt);
const char *zn;
cfg_listelt_t *e;
zn = cfg_obj_asstring(cfg_tuple_get(zconf, "name"));
result = dns_name_fromstring(myname, zn, 0, NULL);
if (result != ISC_R_SUCCESS || !dns_name_equal(zname, myname)) {
continue;
}
DE_CONST(elt, e);
ISC_LIST_UNLINK(*list, e, link);
cfg_obj_destroy(pctx, &e->obj);
isc_mem_put(pctx->mctx, e, sizeof(*e));
result = ISC_R_SUCCESS;
break;
}
/*
* Write config to NZF file if appropriate
*/
if (nzfwriter != NULL && view->new_zone_file != NULL) {
result = nzfwriter(config, view);
}
cleanup:
UNLOCK(&view->new_zone_lock);
return (result);
}
static isc_result_t
do_addzone(named_server_t *server, ns_cfgctx_t *cfg, dns_view_t *view,
dns_name_t *name, cfg_obj_t *zoneconf, const cfg_obj_t *zoneobj,
bool redirect, isc_buffer_t **text) {
isc_result_t result, tresult;
dns_zone_t *zone = NULL;
#ifndef HAVE_LMDB
FILE *fp = NULL;
bool cleanup_config = false;
#else /* HAVE_LMDB */
MDB_txn *txn = NULL;
MDB_dbi dbi;
UNUSED(zoneconf);
#endif /* HAVE_LMDB */
/* Zone shouldn't already exist */
if (redirect) {
result = (view->redirect != NULL) ? ISC_R_SUCCESS
: ISC_R_NOTFOUND;
} else {
result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
}
if (result == ISC_R_SUCCESS) {
result = ISC_R_EXISTS;
goto cleanup;
} else if (result == DNS_R_PARTIALMATCH) {
/* Create our sub-zone anyway */
dns_zone_detach(&zone);
zone = NULL;
} else if (result != ISC_R_NOTFOUND) {
goto cleanup;
}
#ifndef HAVE_LMDB
/*
* Make sure we can open the configuration save file
*/
result = isc_stdio_open(view->new_zone_file, "a", &fp);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "unable to create '"));
TCHECK(putstr(text, view->new_zone_file));
TCHECK(putstr(text, "': "));
TCHECK(putstr(text, isc_result_totext(result)));
goto cleanup;
}
(void)isc_stdio_close(fp);
fp = NULL;
#else /* HAVE_LMDB */
/* Make sure we can open the NZD database */
result = nzd_writable(view);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "unable to open NZD database for '"));
TCHECK(putstr(text, view->new_zone_db));
TCHECK(putstr(text, "'"));
result = ISC_R_FAILURE;
goto cleanup;
}
#endif /* HAVE_LMDB */
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/* Mark view unfrozen and configure zone */
dns_view_thaw(view);
result = configure_zone(cfg->config, zoneobj, cfg->vconfig,
server->mctx, view, &server->viewlist,
&server->kasplist, cfg->actx, true, false,
false);
dns_view_freeze(view);
isc_task_endexclusive(server->task);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "configure_zone failed: "));
TCHECK(putstr(text, isc_result_totext(result)));
goto cleanup;
}
/* Is it there yet? */
if (redirect) {
if (view->redirect == NULL) {
CHECK(ISC_R_NOTFOUND);
}
dns_zone_attach(view->redirect, &zone);
} else {
result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"added new zone was not found: %s",
isc_result_totext(result));
goto cleanup;
}
}
#ifndef HAVE_LMDB
/*
* If there wasn't a previous newzone config, just save the one
* we've created. If there was a previous one, merge the new
* zone into it.
*/
if (cfg->nzf_config == NULL) {
cfg_obj_attach(zoneconf, &cfg->nzf_config);
} else {
cfg_obj_t *z;
DE_CONST(zoneobj, z);
CHECK(cfg_parser_mapadd(cfg->add_parser, cfg->nzf_config, z,
"zone"));
}
cleanup_config = true;
#endif /* HAVE_LMDB */
/*
* Load the zone from the master file. If this fails, we'll
* need to undo the configuration we've done already.
*/
result = dns_zone_load(zone, true);
if (result != ISC_R_SUCCESS) {
dns_db_t *dbp = NULL;
TCHECK(putstr(text, "dns_zone_loadnew failed: "));
TCHECK(putstr(text, isc_result_totext(result)));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"addzone failed; reverting.");
/* If the zone loaded partially, unload it */
if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(zone);
}
/* Remove the zone from the zone table */
dns_zt_unmount(view->zonetable, zone);
goto cleanup;
}
/* Flag the zone as having been added at runtime */
dns_zone_setadded(zone, true);
#ifdef HAVE_LMDB
/* Save the new zone configuration into the NZD */
CHECK(nzd_open(view, 0, &txn, &dbi));
CHECK(nzd_save(&txn, dbi, zone, zoneobj));
#else /* ifdef HAVE_LMDB */
/* Append the zone configuration to the NZF */
result = nzf_append(view, zoneobj);
#endif /* HAVE_LMDB */
cleanup:
#ifndef HAVE_LMDB
if (fp != NULL) {
(void)isc_stdio_close(fp);
}
if (result != ISC_R_SUCCESS && cleanup_config) {
tresult = delete_zoneconf(view, cfg->add_parser,
cfg->nzf_config, name, NULL);
RUNTIME_CHECK(tresult == ISC_R_SUCCESS);
}
#else /* HAVE_LMDB */
if (txn != NULL) {
(void)nzd_close(&txn, false);
}
#endif /* HAVE_LMDB */
if (zone != NULL) {
dns_zone_detach(&zone);
}
return (result);
}
static isc_result_t
do_modzone(named_server_t *server, ns_cfgctx_t *cfg, dns_view_t *view,
dns_name_t *name, const char *zname, const cfg_obj_t *zoneobj,
bool redirect, isc_buffer_t **text) {
isc_result_t result, tresult;
dns_zone_t *zone = NULL;
bool added;
bool exclusive = false;
#ifndef HAVE_LMDB
FILE *fp = NULL;
cfg_obj_t *z;
#else /* HAVE_LMDB */
MDB_txn *txn = NULL;
MDB_dbi dbi;
#endif /* HAVE_LMDB */
/* Zone must already exist */
if (redirect) {
if (view->redirect != NULL) {
dns_zone_attach(view->redirect, &zone);
result = ISC_R_SUCCESS;
} else {
result = ISC_R_NOTFOUND;
}
} else {
result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
}
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
added = dns_zone_getadded(zone);
dns_zone_detach(&zone);
#ifndef HAVE_LMDB
cfg = (ns_cfgctx_t *)view->new_zone_config;
if (cfg == NULL) {
TCHECK(putstr(text, "new zone config is not set"));
CHECK(ISC_R_FAILURE);
}
#endif /* ifndef HAVE_LMDB */
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
exclusive = true;
#ifndef HAVE_LMDB
/* Make sure we can open the configuration save file */
result = isc_stdio_open(view->new_zone_file, "a", &fp);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "unable to open '"));
TCHECK(putstr(text, view->new_zone_file));
TCHECK(putstr(text, "': "));
TCHECK(putstr(text, isc_result_totext(result)));
goto cleanup;
}
(void)isc_stdio_close(fp);
fp = NULL;
#else /* HAVE_LMDB */
/* Make sure we can open the NZD database */
result = nzd_writable(view);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "unable to open NZD database for '"));
TCHECK(putstr(text, view->new_zone_db));
TCHECK(putstr(text, "'"));
result = ISC_R_FAILURE;
goto cleanup;
}
#endif /* HAVE_LMDB */
/* Reconfigure the zone */
dns_view_thaw(view);
result = configure_zone(cfg->config, zoneobj, cfg->vconfig,
server->mctx, view, &server->viewlist,
&server->kasplist, cfg->actx, true, false,
true);
dns_view_freeze(view);
exclusive = false;
isc_task_endexclusive(server->task);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "configure_zone failed: "));
TCHECK(putstr(text, isc_result_totext(result)));
goto cleanup;
}
/* Is it there yet? */
if (redirect) {
if (view->redirect == NULL) {
CHECK(ISC_R_NOTFOUND);
}
dns_zone_attach(view->redirect, &zone);
} else {
CHECK(dns_zt_find(view->zonetable, name, 0, NULL, &zone));
}
#ifndef HAVE_LMDB
/* Remove old zone from configuration (and NZF file if applicable) */
if (added) {
result = delete_zoneconf(view, cfg->add_parser, cfg->nzf_config,
dns_zone_getorigin(zone),
nzf_writeconf);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "former zone configuration "
"not deleted: "));
TCHECK(putstr(text, isc_result_totext(result)));
goto cleanup;
}
}
#endif /* HAVE_LMDB */
if (!added) {
if (cfg->vconfig == NULL) {
result = delete_zoneconf(
view, cfg->conf_parser, cfg->config,
dns_zone_getorigin(zone), NULL);
} else {
const cfg_obj_t *voptions = cfg_tuple_get(cfg->vconfig,
"options");
result = delete_zoneconf(
view, cfg->conf_parser, voptions,
dns_zone_getorigin(zone), NULL);
}
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "former zone configuration "
"not deleted: "));
TCHECK(putstr(text, isc_result_totext(result)));
goto cleanup;
}
}
/* Load the zone from the master file if it needs reloading. */
result = dns_zone_load(zone, true);
/*
* Dynamic zones need no reloading, so we can pass this result.
*/
if (result == DNS_R_DYNAMIC) {
result = ISC_R_SUCCESS;
}
if (result != ISC_R_SUCCESS) {
dns_db_t *dbp = NULL;
TCHECK(putstr(text, "failed to load zone '"));
TCHECK(putstr(text, zname));
TCHECK(putstr(text, "': "));
TCHECK(putstr(text, isc_result_totext(result)));
TCHECK(putstr(text, "\nThe zone is no longer being served. "));
TCHECK(putstr(text, "Use 'rndc addzone' to correct\n"));
TCHECK(putstr(text, "the problem and restore service."));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"modzone failed; removing zone.");
/* If the zone loaded partially, unload it */
if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(zone);
}
/* Remove the zone from the zone table */
dns_zt_unmount(view->zonetable, zone);
goto cleanup;
}
#ifndef HAVE_LMDB
/* Store the new zone configuration; also in NZF if applicable */
DE_CONST(zoneobj, z);
CHECK(cfg_parser_mapadd(cfg->add_parser, cfg->nzf_config, z, "zone"));
#endif /* HAVE_LMDB */
if (added) {
#ifdef HAVE_LMDB
CHECK(nzd_open(view, 0, &txn, &dbi));
CHECK(nzd_save(&txn, dbi, zone, zoneobj));
#else /* ifdef HAVE_LMDB */
result = nzf_append(view, zoneobj);
if (result != ISC_R_SUCCESS) {
TCHECK(putstr(text, "\nNew zone config not saved: "));
TCHECK(putstr(text, isc_result_totext(result)));
goto cleanup;
}
#endif /* HAVE_LMDB */
TCHECK(putstr(text, "zone '"));
TCHECK(putstr(text, zname));
TCHECK(putstr(text, "' reconfigured."));
} else {
TCHECK(putstr(text, "zone '"));
TCHECK(putstr(text, zname));
TCHECK(putstr(text, "' must also be reconfigured in\n"));
TCHECK(putstr(text, "named.conf to make changes permanent."));
}
cleanup:
if (exclusive) {
isc_task_endexclusive(server->task);
}
#ifndef HAVE_LMDB
if (fp != NULL) {
(void)isc_stdio_close(fp);
}
#else /* HAVE_LMDB */
if (txn != NULL) {
(void)nzd_close(&txn, false);
}
#endif /* HAVE_LMDB */
if (zone != NULL) {
dns_zone_detach(&zone);
}
return (result);
}
/*
* Act on an "addzone" or "modzone" command from the command channel.
*/
isc_result_t
named_server_changezone(named_server_t *server, char *command,
isc_buffer_t **text) {
isc_result_t result;
bool addzone;
bool redirect = false;
ns_cfgctx_t *cfg = NULL;
cfg_obj_t *zoneconf = NULL;
const cfg_obj_t *zoneobj = NULL;
const char *zonename;
dns_view_t *view = NULL;
isc_buffer_t buf;
dns_fixedname_t fname;
dns_name_t *dnsname;
if (strncasecmp(command, "add", 3) == 0) {
addzone = true;
} else {
INSIST(strncasecmp(command, "mod", 3) == 0);
addzone = false;
}
CHECK(newzone_parse(server, command, &view, &zoneconf, &zoneobj,
&redirect, text));
/* Are we accepting new zones in this view? */
#ifdef HAVE_LMDB
if (view->new_zone_db == NULL)
#else /* ifdef HAVE_LMDB */
if (view->new_zone_file == NULL)
#endif /* HAVE_LMDB */
{
(void)putstr(text, "Not allowing new zones in view '");
(void)putstr(text, view->name);
(void)putstr(text, "'");
result = ISC_R_NOPERM;
goto cleanup;
}
cfg = (ns_cfgctx_t *)view->new_zone_config;
if (cfg == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
zonename = cfg_obj_asstring(cfg_tuple_get(zoneobj, "name"));
isc_buffer_constinit(&buf, zonename, strlen(zonename));
isc_buffer_add(&buf, strlen(zonename));
dnsname = dns_fixedname_initname(&fname);
CHECK(dns_name_fromtext(dnsname, &buf, dns_rootname, 0, NULL));
if (redirect) {
if (!dns_name_equal(dnsname, dns_rootname)) {
(void)putstr(text, "redirect zones must be called "
"\".\"");
CHECK(ISC_R_FAILURE);
}
}
if (addzone) {
CHECK(do_addzone(server, cfg, view, dnsname, zoneconf, zoneobj,
redirect, text));
} else {
CHECK(do_modzone(server, cfg, view, dnsname, zonename, zoneobj,
redirect, text));
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"%s zone %s in view %s via %s",
addzone ? "added" : "updated", zonename, view->name,
addzone ? NAMED_COMMAND_ADDZONE : NAMED_COMMAND_MODZONE);
/* Changing a zone counts as reconfiguration */
CHECK(isc_time_now(&named_g_configtime));
cleanup:
if (isc_buffer_usedlength(*text) > 0) {
(void)putnull(text);
}
if (zoneconf != NULL) {
cfg_obj_destroy(named_g_addparser, &zoneconf);
}
if (view != NULL) {
dns_view_detach(&view);
}
return (result);
}
static bool
inuse(const char *file, bool first, isc_buffer_t **text) {
if (file != NULL && isc_file_exists(file)) {
if (first) {
(void)putstr(text, "The following files were in use "
"and may now be removed:\n");
} else {
(void)putstr(text, "\n");
}
(void)putstr(text, file);
(void)putnull(text);
return (false);
}
return (first);
}
typedef struct {
dns_zone_t *zone;
bool cleanup;
} ns_dzctx_t;
/*
* Carry out a zone deletion scheduled by named_server_delzone().
*/
static void
rmzone(isc_task_t *task, isc_event_t *event) {
ns_dzctx_t *dz = (ns_dzctx_t *)event->ev_arg;
dns_zone_t *zone, *raw = NULL, *mayberaw;
char zonename[DNS_NAME_FORMATSIZE];
dns_view_t *view;
ns_cfgctx_t *cfg;
dns_db_t *dbp = NULL;
bool added;
isc_result_t result;
#ifdef HAVE_LMDB
MDB_txn *txn = NULL;
MDB_dbi dbi;
#endif /* ifdef HAVE_LMDB */
REQUIRE(dz != NULL);
isc_event_free(&event);
/* Dig out configuration for this zone */
zone = dz->zone;
view = dns_zone_getview(zone);
cfg = (ns_cfgctx_t *)view->new_zone_config;
dns_name_format(dns_zone_getorigin(zone), zonename, sizeof(zonename));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"deleting zone %s in view %s via delzone", zonename,
view->name);
/* Remove the zone from configuration (and NZF file if applicable) */
added = dns_zone_getadded(zone);
if (added && cfg != NULL) {
#ifdef HAVE_LMDB
/* Make sure we can open the NZD database */
result = nzd_open(view, 0, &txn, &dbi);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"unable to open NZD database for '%s'",
view->new_zone_db);
} else {
result = nzd_save(&txn, dbi, zone, NULL);
}
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"unable to "
"delete zone configuration: %s",
isc_result_totext(result));
}
#else /* ifdef HAVE_LMDB */
result = delete_zoneconf(view, cfg->add_parser, cfg->nzf_config,
dns_zone_getorigin(zone),
nzf_writeconf);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"unable to "
"delete zone configuration: %s",
isc_result_totext(result));
}
#endif /* HAVE_LMDB */
}
if (!added && cfg != NULL) {
if (cfg->vconfig != NULL) {
const cfg_obj_t *voptions = cfg_tuple_get(cfg->vconfig,
"options");
result = delete_zoneconf(
view, cfg->conf_parser, voptions,
dns_zone_getorigin(zone), NULL);
} else {
result = delete_zoneconf(
view, cfg->conf_parser, cfg->config,
dns_zone_getorigin(zone), NULL);
}
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"unable to "
"delete zone configuration: %s",
isc_result_totext(result));
}
}
/* Unload zone database */
if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(zone);
}
/* Clean up stub/slave zone files if requested to do so */
dns_zone_getraw(zone, &raw);
mayberaw = (raw != NULL) ? raw : zone;
if (added && dz->cleanup) {
const char *file;
file = dns_zone_getfile(mayberaw);
result = isc_file_remove(file);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"file %s not removed: %s", file,
isc_result_totext(result));
}
file = dns_zone_getjournal(mayberaw);
result = isc_file_remove(file);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"file %s not removed: %s", file,
isc_result_totext(result));
}
if (zone != mayberaw) {
file = dns_zone_getfile(zone);
result = isc_file_remove(file);
if (result != ISC_R_SUCCESS) {
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"file %s not removed: %s", file,
isc_result_totext(result));
}
file = dns_zone_getjournal(zone);
result = isc_file_remove(file);
if (result != ISC_R_SUCCESS) {
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"file %s not removed: %s", file,
isc_result_totext(result));
}
}
}
#ifdef HAVE_LMDB
if (txn != NULL) {
(void)nzd_close(&txn, false);
}
#endif /* ifdef HAVE_LMDB */
if (raw != NULL) {
dns_zone_detach(&raw);
}
dns_zone_detach(&zone);
isc_mem_put(named_g_mctx, dz, sizeof(*dz));
isc_task_detach(&task);
}
/*
* Act on a "delzone" command from the command channel.
*/
isc_result_t
named_server_delzone(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result, tresult;
dns_zone_t *zone = NULL;
dns_zone_t *raw = NULL;
dns_zone_t *mayberaw;
dns_view_t *view = NULL;
char zonename[DNS_NAME_FORMATSIZE];
bool cleanup = false;
const char *ptr;
bool added;
ns_dzctx_t *dz = NULL;
isc_event_t *dzevent = NULL;
isc_task_t *task = NULL;
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Find out what we are to do. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (strcmp(ptr, "-clean") == 0 || strcmp(ptr, "-clear") == 0) {
cleanup = true;
ptr = next_token(lex, text);
}
CHECK(zone_from_args(server, lex, ptr, &zone, zonename, text, false));
if (zone == NULL) {
result = ISC_R_UNEXPECTEDEND;
goto cleanup;
}
INSIST(zonename != NULL);
/* Is this a policy zone? */
if (dns_zone_get_rpz_num(zone) != DNS_RPZ_INVALID_NUM) {
TCHECK(putstr(text, "zone '"));
TCHECK(putstr(text, zonename));
TCHECK(putstr(text, "' cannot be deleted: response-policy "
"zone."));
result = ISC_R_FAILURE;
goto cleanup;
}
view = dns_zone_getview(zone);
if (dns_zone_gettype(zone) == dns_zone_redirect) {
dns_zone_detach(&view->redirect);
} else {
CHECK(dns_zt_unmount(view->zonetable, zone));
}
/* Send cleanup event */
dz = isc_mem_get(named_g_mctx, sizeof(*dz));
dz->cleanup = cleanup;
dz->zone = NULL;
dns_zone_attach(zone, &dz->zone);
dzevent = isc_event_allocate(named_g_mctx, server, NAMED_EVENT_DELZONE,
rmzone, dz, sizeof(isc_event_t));
dns_zone_gettask(zone, &task);
isc_task_send(task, &dzevent);
dz = NULL;
/* Inform user about cleaning up stub/slave zone files */
dns_zone_getraw(zone, &raw);
mayberaw = (raw != NULL) ? raw : zone;
added = dns_zone_getadded(zone);
if (!added) {
TCHECK(putstr(text, "zone '"));
TCHECK(putstr(text, zonename));
TCHECK(putstr(text, "' is no longer active and will be "
"deleted.\n"));
TCHECK(putstr(text, "To keep it from returning "));
TCHECK(putstr(text, "when the server is restarted, it\n"));
TCHECK(putstr(text, "must also be removed from named.conf."));
} else if (cleanup) {
TCHECK(putstr(text, "zone '"));
TCHECK(putstr(text, zonename));
TCHECK(putstr(text, "' and associated files will be deleted."));
} else if (dns_zone_gettype(mayberaw) == dns_zone_slave ||
dns_zone_gettype(mayberaw) == dns_zone_mirror ||
dns_zone_gettype(mayberaw) == dns_zone_stub)
{
bool first;
const char *file;
TCHECK(putstr(text, "zone '"));
TCHECK(putstr(text, zonename));
TCHECK(putstr(text, "' will be deleted."));
file = dns_zone_getfile(mayberaw);
first = inuse(file, true, text);
file = dns_zone_getjournal(mayberaw);
first = inuse(file, first, text);
if (zone != mayberaw) {
file = dns_zone_getfile(zone);
first = inuse(file, first, text);
file = dns_zone_getjournal(zone);
(void)inuse(file, first, text);
}
}
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"zone %s scheduled for removal via delzone", zonename);
/* Removing a zone counts as reconfiguration */
CHECK(isc_time_now(&named_g_configtime));
result = ISC_R_SUCCESS;
cleanup:
if (isc_buffer_usedlength(*text) > 0) {
(void)putnull(text);
}
if (raw != NULL) {
dns_zone_detach(&raw);
}
if (zone != NULL) {
dns_zone_detach(&zone);
}
return (result);
}
static const cfg_obj_t *
find_name_in_list_from_map(const cfg_obj_t *config,
const char *map_key_for_list, const char *name,
bool redirect) {
const cfg_obj_t *list = NULL;
const cfg_listelt_t *element;
const cfg_obj_t *obj = NULL;
dns_fixedname_t fixed1, fixed2;
dns_name_t *name1 = NULL, *name2 = NULL;
isc_result_t result;
if (strcmp(map_key_for_list, "zone") == 0) {
name1 = dns_fixedname_initname(&fixed1);
name2 = dns_fixedname_initname(&fixed2);
result = dns_name_fromstring(name1, name, 0, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
}
cfg_map_get(config, map_key_for_list, &list);
for (element = cfg_list_first(list); element != NULL;
element = cfg_list_next(element))
{
const char *vname;
obj = cfg_listelt_value(element);
INSIST(obj != NULL);
vname = cfg_obj_asstring(cfg_tuple_get(obj, "name"));
if (vname == NULL) {
obj = NULL;
continue;
}
if (name1 != NULL) {
result = dns_name_fromstring(name2, vname, 0, NULL);
if (result == ISC_R_SUCCESS &&
dns_name_equal(name1, name2)) {
const cfg_obj_t *zoptions;
const cfg_obj_t *typeobj = NULL;
zoptions = cfg_tuple_get(obj, "options");
if (zoptions != NULL) {
cfg_map_get(zoptions, "type", &typeobj);
}
if (redirect && typeobj != NULL &&
strcasecmp(cfg_obj_asstring(typeobj),
"redirect") == 0)
{
break;
} else if (!redirect) {
break;
}
}
} else if (strcasecmp(vname, name) == 0) {
break;
}
obj = NULL;
}
return (obj);
}
static void
emitzone(void *arg, const char *buf, int len) {
ns_dzarg_t *dzarg = arg;
isc_result_t result;
REQUIRE(dzarg != NULL && ISC_MAGIC_VALID(dzarg, DZARG_MAGIC));
result = putmem(dzarg->text, buf, len);
if (result != ISC_R_SUCCESS && dzarg->result == ISC_R_SUCCESS) {
dzarg->result = result;
}
}
/*
* Act on a "showzone" command from the command channel.
*/
isc_result_t
named_server_showzone(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result;
const cfg_obj_t *vconfig = NULL, *zconfig = NULL;
char zonename[DNS_NAME_FORMATSIZE];
const cfg_obj_t *map;
dns_view_t *view = NULL;
dns_zone_t *zone = NULL;
ns_cfgctx_t *cfg = NULL;
bool exclusive = false;
#ifdef HAVE_LMDB
cfg_obj_t *nzconfig = NULL;
#endif /* HAVE_LMDB */
bool added, redirect;
ns_dzarg_t dzarg;
/* Parse parameters */
CHECK(zone_from_args(server, lex, NULL, &zone, zonename, text, true));
if (zone == NULL) {
result = ISC_R_UNEXPECTEDEND;
goto cleanup;
}
redirect = dns_zone_gettype(zone) == dns_zone_redirect;
added = dns_zone_getadded(zone);
view = dns_zone_getview(zone);
dns_zone_detach(&zone);
cfg = (ns_cfgctx_t *)view->new_zone_config;
if (cfg == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
exclusive = true;
if (!added) {
/* Find the view statement */
vconfig = find_name_in_list_from_map(cfg->config, "view",
view->name, false);
/* Find the zone statement */
if (vconfig != NULL) {
map = cfg_tuple_get(vconfig, "options");
} else {
map = cfg->config;
}
zconfig = find_name_in_list_from_map(map, "zone", zonename,
redirect);
}
#ifndef HAVE_LMDB
if (zconfig == NULL && cfg->nzf_config != NULL) {
zconfig = find_name_in_list_from_map(cfg->nzf_config, "zone",
zonename, redirect);
}
#else /* HAVE_LMDB */
if (zconfig == NULL) {
const cfg_obj_t *zlist = NULL;
CHECK(get_newzone_config(view, zonename, &nzconfig));
CHECK(cfg_map_get(nzconfig, "zone", &zlist));
if (!cfg_obj_islist(zlist)) {
CHECK(ISC_R_FAILURE);
}
zconfig = cfg_listelt_value(cfg_list_first(zlist));
}
#endif /* HAVE_LMDB */
if (zconfig == NULL) {
CHECK(ISC_R_NOTFOUND);
}
CHECK(putstr(text, "zone "));
dzarg.magic = DZARG_MAGIC;
dzarg.text = text;
dzarg.result = ISC_R_SUCCESS;
cfg_printx(zconfig, CFG_PRINTER_ONELINE, emitzone, &dzarg);
CHECK(dzarg.result);
CHECK(putstr(text, ";"));
result = ISC_R_SUCCESS;
cleanup:
#ifdef HAVE_LMDB
if (nzconfig != NULL) {
cfg_obj_destroy(named_g_addparser, &nzconfig);
}
#endif /* HAVE_LMDB */
if (isc_buffer_usedlength(*text) > 0) {
(void)putnull(text);
}
if (exclusive) {
isc_task_endexclusive(server->task);
}
return (result);
}
static void
newzone_cfgctx_destroy(void **cfgp) {
ns_cfgctx_t *cfg;
REQUIRE(cfgp != NULL && *cfgp != NULL);
cfg = *cfgp;
if (cfg->conf_parser != NULL) {
if (cfg->config != NULL) {
cfg_obj_destroy(cfg->conf_parser, &cfg->config);
}
if (cfg->vconfig != NULL) {
cfg_obj_destroy(cfg->conf_parser, &cfg->vconfig);
}
cfg_parser_destroy(&cfg->conf_parser);
}
if (cfg->add_parser != NULL) {
if (cfg->nzf_config != NULL) {
cfg_obj_destroy(cfg->add_parser, &cfg->nzf_config);
}
cfg_parser_destroy(&cfg->add_parser);
}
if (cfg->actx != NULL) {
cfg_aclconfctx_detach(&cfg->actx);
}
isc_mem_putanddetach(&cfg->mctx, cfg, sizeof(*cfg));
*cfgp = NULL;
}
static isc_result_t
generate_salt(unsigned char *salt, size_t saltlen) {
unsigned char text[512 + 1];
isc_region_t r;
isc_buffer_t buf;
isc_result_t result;
if (saltlen > 256U) {
return (ISC_R_RANGE);
}
isc_nonce_buf(salt, saltlen);
r.base = salt;
r.length = (unsigned int)saltlen;
isc_buffer_init(&buf, text, sizeof(text));
result = isc_hex_totext(&r, 2, "", &buf);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
text[saltlen * 2] = 0;
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"generated salt: %s", text);
return (ISC_R_SUCCESS);
}
isc_result_t
named_server_signing(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result = ISC_R_SUCCESS;
dns_zone_t *zone = NULL;
dns_name_t *origin;
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdatatype_t privatetype;
dns_rdataset_t privset;
bool first = true;
bool list = false, clear = false;
bool chain = false;
bool setserial = false;
uint32_t serial = 0;
char keystr[DNS_SECALG_FORMATSIZE + 7]; /* <5-digit keyid>/<alg> */
unsigned short hash = 0, flags = 0, iter = 0, saltlen = 0;
unsigned char salt[255];
const char *ptr;
size_t n;
dns_rdataset_init(&privset);
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Find out what we are to do. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (strcasecmp(ptr, "-list") == 0) {
list = true;
} else if ((strcasecmp(ptr, "-clear") == 0) ||
(strcasecmp(ptr, "-clean") == 0)) {
clear = true;
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
strlcpy(keystr, ptr, sizeof(keystr));
} else if (strcasecmp(ptr, "-nsec3param") == 0) {
char hashbuf[64], flagbuf[64], iterbuf[64];
char nbuf[256];
chain = true;
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (strcasecmp(ptr, "none") == 0) {
hash = 0;
} else {
strlcpy(hashbuf, ptr, sizeof(hashbuf));
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
strlcpy(flagbuf, ptr, sizeof(flagbuf));
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
strlcpy(iterbuf, ptr, sizeof(iterbuf));
n = snprintf(nbuf, sizeof(nbuf), "%s %s %s", hashbuf,
flagbuf, iterbuf);
if (n == sizeof(nbuf)) {
return (ISC_R_NOSPACE);
}
n = sscanf(nbuf, "%hu %hu %hu", &hash, &flags, &iter);
if (n != 3U) {
return (ISC_R_BADNUMBER);
}
if (hash > 0xffU || flags > 0xffU) {
return (ISC_R_RANGE);
}
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
} else if (strcasecmp(ptr, "auto") == 0) {
/* Auto-generate a random salt.
* XXXMUKS: This currently uses the
* minimum recommended length by RFC
* 5155 (64 bits). It should be made
* configurable.
*/
saltlen = 8;
CHECK(generate_salt(salt, saltlen));
} else if (strcmp(ptr, "-") != 0) {
isc_buffer_t buf;
isc_buffer_init(&buf, salt, sizeof(salt));
CHECK(isc_hex_decodestring(ptr, &buf));
saltlen = isc_buffer_usedlength(&buf);
}
}
} else if (strcasecmp(ptr, "-serial") == 0) {
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
CHECK(isc_parse_uint32(&serial, ptr, 10));
setserial = true;
} else {
CHECK(DNS_R_SYNTAX);
}
CHECK(zone_from_args(server, lex, NULL, &zone, NULL, text, false));
if (zone == NULL) {
CHECK(ISC_R_UNEXPECTEDEND);
}
if (clear) {
CHECK(dns_zone_keydone(zone, keystr));
(void)putstr(text, "request queued");
(void)putnull(text);
} else if (chain) {
CHECK(dns_zone_setnsec3param(zone, (uint8_t)hash,
(uint8_t)flags, iter,
(uint8_t)saltlen, salt, true));
(void)putstr(text, "nsec3param request queued");
(void)putnull(text);
} else if (setserial) {
CHECK(dns_zone_setserial(zone, serial));
(void)putstr(text, "serial request queued");
(void)putnull(text);
} else if (list) {
privatetype = dns_zone_getprivatetype(zone);
origin = dns_zone_getorigin(zone);
CHECK(dns_zone_getdb(zone, &db));
CHECK(dns_db_findnode(db, origin, false, &node));
dns_db_currentversion(db, &version);
result = dns_db_findrdataset(db, node, version, privatetype,
dns_rdatatype_none, 0, &privset,
NULL);
if (result == ISC_R_NOTFOUND) {
(void)putstr(text, "No signing records found");
(void)putnull(text);
result = ISC_R_SUCCESS;
goto cleanup;
}
for (result = dns_rdataset_first(&privset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&privset))
{
dns_rdata_t priv = DNS_RDATA_INIT;
char output[BUFSIZ];
isc_buffer_t buf;
dns_rdataset_current(&privset, &priv);
isc_buffer_init(&buf, output, sizeof(output));
CHECK(dns_private_totext(&priv, &buf));
if (!first) {
CHECK(putstr(text, "\n"));
}
CHECK(putstr(text, output));
first = false;
}
if (!first) {
CHECK(putnull(text));
}
if (result == ISC_R_NOMORE) {
result = ISC_R_SUCCESS;
}
}
cleanup:
if (dns_rdataset_isassociated(&privset)) {
dns_rdataset_disassociate(&privset);
}
if (node != NULL) {
dns_db_detachnode(db, &node);
}
if (version != NULL) {
dns_db_closeversion(db, &version, false);
}
if (db != NULL) {
dns_db_detach(&db);
}
if (zone != NULL) {
dns_zone_detach(&zone);
}
return (result);
}
static isc_result_t
putmem(isc_buffer_t **b, const char *str, size_t len) {
isc_result_t result;
result = isc_buffer_reserve(b, (unsigned int)len);
if (result != ISC_R_SUCCESS) {
return (ISC_R_NOSPACE);
}
isc_buffer_putmem(*b, (const unsigned char *)str, (unsigned int)len);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
putstr(isc_buffer_t **b, const char *str) {
return (putmem(b, str, strlen(str)));
}
static isc_result_t
putuint8(isc_buffer_t **b, uint8_t val) {
isc_result_t result;
result = isc_buffer_reserve(b, 1);
if (result != ISC_R_SUCCESS) {
return (ISC_R_NOSPACE);
}
isc_buffer_putuint8(*b, val);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
putnull(isc_buffer_t **b) {
return (putuint8(b, 0));
}
isc_result_t
named_server_zonestatus(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
isc_result_t result = ISC_R_SUCCESS;
dns_zone_t *zone = NULL, *raw = NULL, *mayberaw = NULL;
const char *type, *file;
char zonename[DNS_NAME_FORMATSIZE];
uint32_t serial, signed_serial, nodes;
char serbuf[16], sserbuf[16], nodebuf[16];
char resignbuf[DNS_NAME_FORMATSIZE + DNS_RDATATYPE_FORMATSIZE + 2];
char lbuf[ISC_FORMATHTTPTIMESTAMP_SIZE];
char xbuf[ISC_FORMATHTTPTIMESTAMP_SIZE];
char rbuf[ISC_FORMATHTTPTIMESTAMP_SIZE];
char kbuf[ISC_FORMATHTTPTIMESTAMP_SIZE];
char rtbuf[ISC_FORMATHTTPTIMESTAMP_SIZE];
isc_time_t loadtime, expiretime, refreshtime;
isc_time_t refreshkeytime, resigntime;
dns_zonetype_t zonetype;
bool dynamic = false, frozen = false;
bool hasraw = false;
bool secure, maintain, allow;
dns_db_t *db = NULL, *rawdb = NULL;
char **incfiles = NULL;
int nfiles = 0;
isc_time_settoepoch(&loadtime);
isc_time_settoepoch(&refreshtime);
isc_time_settoepoch(&expiretime);
isc_time_settoepoch(&refreshkeytime);
isc_time_settoepoch(&resigntime);
CHECK(zone_from_args(server, lex, NULL, &zone, zonename, text, true));
if (zone == NULL) {
result = ISC_R_UNEXPECTEDEND;
goto cleanup;
}
/* Inline signing? */
CHECK(dns_zone_getdb(zone, &db));
dns_zone_getraw(zone, &raw);
hasraw = (raw != NULL);
if (hasraw) {
mayberaw = raw;
zonetype = dns_zone_gettype(raw);
CHECK(dns_zone_getdb(raw, &rawdb));
} else {
mayberaw = zone;
zonetype = dns_zone_gettype(zone);
}
switch (zonetype) {
case dns_zone_master:
type = "master";
break;
case dns_zone_slave:
type = "slave";
break;
case dns_zone_mirror:
type = "mirror";
break;
case dns_zone_stub:
type = "stub";
break;
case dns_zone_staticstub:
type = "staticstub";
break;
case dns_zone_redirect:
type = "redirect";
break;
case dns_zone_key:
type = "key";
break;
case dns_zone_dlz:
type = "dlz";
break;
default:
type = "unknown";
}
/* Serial number */
result = dns_zone_getserial(mayberaw, &serial);
/* XXXWPK TODO this is to mirror old behavior with dns_zone_getserial */
if (result != ISC_R_SUCCESS) {
serial = 0;
}
snprintf(serbuf, sizeof(serbuf), "%u", serial);
if (hasraw) {
result = dns_zone_getserial(zone, &signed_serial);
/* XXXWPK TODO ut supra */
if (result != ISC_R_SUCCESS) {
serial = 0;
}
snprintf(sserbuf, sizeof(sserbuf), "%u", signed_serial);
}
/* Database node count */
nodes = dns_db_nodecount(hasraw ? rawdb : db);
snprintf(nodebuf, sizeof(nodebuf), "%u", nodes);
/* Security */
secure = dns_db_issecure(db);
allow = ((dns_zone_getkeyopts(zone) & DNS_ZONEKEY_ALLOW) != 0);
maintain = ((dns_zone_getkeyopts(zone) & DNS_ZONEKEY_MAINTAIN) != 0);
/* Master files */
file = dns_zone_getfile(mayberaw);
nfiles = dns_zone_getincludes(mayberaw, &incfiles);
/* Load time */
dns_zone_getloadtime(zone, &loadtime);
isc_time_formathttptimestamp(&loadtime, lbuf, sizeof(lbuf));
/* Refresh/expire times */
if (zonetype == dns_zone_slave || zonetype == dns_zone_mirror ||
zonetype == dns_zone_stub || zonetype == dns_zone_redirect)
{
dns_zone_getexpiretime(mayberaw, &expiretime);
isc_time_formathttptimestamp(&expiretime, xbuf, sizeof(xbuf));
dns_zone_getrefreshtime(mayberaw, &refreshtime);
isc_time_formathttptimestamp(&refreshtime, rbuf, sizeof(rbuf));
}
/* Key refresh time */
if (zonetype == dns_zone_master ||
(zonetype == dns_zone_slave && hasraw)) {
dns_zone_getrefreshkeytime(zone, &refreshkeytime);
isc_time_formathttptimestamp(&refreshkeytime, kbuf,
sizeof(kbuf));
}
/* Dynamic? */
if (zonetype == dns_zone_master) {
dynamic = dns_zone_isdynamic(mayberaw, true);
frozen = dynamic && !dns_zone_isdynamic(mayberaw, false);
}
/* Next resign event */
if (secure &&
(zonetype == dns_zone_master ||
(zonetype == dns_zone_slave && hasraw)) &&
((dns_zone_getkeyopts(zone) & DNS_ZONEKEY_NORESIGN) == 0))
{
dns_name_t *name;
dns_fixedname_t fixed;
dns_rdataset_t next;
dns_rdataset_init(&next);
name = dns_fixedname_initname(&fixed);
result = dns_db_getsigningtime(db, &next, name);
if (result == ISC_R_SUCCESS) {
isc_stdtime_t timenow;
char namebuf[DNS_NAME_FORMATSIZE];
char typebuf[DNS_RDATATYPE_FORMATSIZE];
isc_stdtime_get(&timenow);
dns_name_format(name, namebuf, sizeof(namebuf));
dns_rdatatype_format(next.covers, typebuf,
sizeof(typebuf));
snprintf(resignbuf, sizeof(resignbuf), "%s/%s", namebuf,
typebuf);
isc_time_set(
&resigntime,
next.resign -
dns_zone_getsigresigninginterval(zone),
0);
isc_time_formathttptimestamp(&resigntime, rtbuf,
sizeof(rtbuf));
dns_rdataset_disassociate(&next);
}
}
/* Create text */
CHECK(putstr(text, "name: "));
CHECK(putstr(text, zonename));
CHECK(putstr(text, "\ntype: "));
CHECK(putstr(text, type));
if (file != NULL) {
int i;
CHECK(putstr(text, "\nfiles: "));
CHECK(putstr(text, file));
for (i = 0; i < nfiles; i++) {
CHECK(putstr(text, ", "));
if (incfiles[i] != NULL) {
CHECK(putstr(text, incfiles[i]));
}
}
}
CHECK(putstr(text, "\nserial: "));
CHECK(putstr(text, serbuf));
if (hasraw) {
CHECK(putstr(text, "\nsigned serial: "));
CHECK(putstr(text, sserbuf));
}
CHECK(putstr(text, "\nnodes: "));
CHECK(putstr(text, nodebuf));
if (!isc_time_isepoch(&loadtime)) {
CHECK(putstr(text, "\nlast loaded: "));
CHECK(putstr(text, lbuf));
}
if (!isc_time_isepoch(&refreshtime)) {
CHECK(putstr(text, "\nnext refresh: "));
CHECK(putstr(text, rbuf));
}
if (!isc_time_isepoch(&expiretime)) {
CHECK(putstr(text, "\nexpires: "));
CHECK(putstr(text, xbuf));
}
if (secure) {
CHECK(putstr(text, "\nsecure: yes"));
if (hasraw) {
CHECK(putstr(text, "\ninline signing: yes"));
} else {
CHECK(putstr(text, "\ninline signing: no"));
}
} else {
CHECK(putstr(text, "\nsecure: no"));
}
if (maintain) {
CHECK(putstr(text, "\nkey maintenance: automatic"));
if (!isc_time_isepoch(&refreshkeytime)) {
CHECK(putstr(text, "\nnext key event: "));
CHECK(putstr(text, kbuf));
}
} else if (allow) {
CHECK(putstr(text, "\nkey maintenance: on command"));
} else if (secure || hasraw) {
CHECK(putstr(text, "\nkey maintenance: none"));
}
if (!isc_time_isepoch(&resigntime)) {
CHECK(putstr(text, "\nnext resign node: "));
CHECK(putstr(text, resignbuf));
CHECK(putstr(text, "\nnext resign time: "));
CHECK(putstr(text, rtbuf));
}
if (dynamic) {
CHECK(putstr(text, "\ndynamic: yes"));
if (frozen) {
CHECK(putstr(text, "\nfrozen: yes"));
} else {
CHECK(putstr(text, "\nfrozen: no"));
}
} else {
CHECK(putstr(text, "\ndynamic: no"));
}
CHECK(putstr(text, "\nreconfigurable via modzone: "));
CHECK(putstr(text, dns_zone_getadded(zone) ? "yes" : "no"));
cleanup:
/* Indicate truncated output if possible. */
if (result == ISC_R_NOSPACE) {
(void)putstr(text, "\n...");
}
if ((result == ISC_R_SUCCESS || result == ISC_R_NOSPACE)) {
(void)putnull(text);
}
if (db != NULL) {
dns_db_detach(&db);
}
if (rawdb != NULL) {
dns_db_detach(&rawdb);
}
if (incfiles != NULL && mayberaw != NULL) {
int i;
isc_mem_t *mctx = dns_zone_getmctx(mayberaw);
for (i = 0; i < nfiles; i++) {
if (incfiles[i] != NULL) {
isc_mem_free(mctx, incfiles[i]);
}
}
isc_mem_free(mctx, incfiles);
}
if (raw != NULL) {
dns_zone_detach(&raw);
}
if (zone != NULL) {
dns_zone_detach(&zone);
}
return (result);
}
static inline bool
argcheck(char *cmd, const char *full) {
size_t l;
if (cmd == NULL || cmd[0] != '-') {
return (false);
}
cmd++;
l = strlen(cmd);
if (l > strlen(full) || strncasecmp(cmd, full, l) != 0) {
return (false);
}
return (true);
}
isc_result_t
named_server_nta(named_server_t *server, isc_lex_t *lex, bool readonly,
isc_buffer_t **text) {
dns_view_t *view;
dns_ntatable_t *ntatable = NULL;
isc_result_t result = ISC_R_SUCCESS;
char *ptr, *nametext = NULL, *viewname;
char namebuf[DNS_NAME_FORMATSIZE];
char viewbuf[DNS_NAME_FORMATSIZE];
isc_stdtime_t now, when;
isc_time_t t;
char tbuf[64];
const char *msg = NULL;
bool dump = false, force = false;
dns_fixedname_t fn;
const dns_name_t *ntaname;
dns_name_t *fname;
dns_ttl_t ntattl;
bool ttlset = false, excl = false, viewfound = false;
dns_rdataclass_t rdclass = dns_rdataclass_in;
bool first = true;
UNUSED(force);
fname = dns_fixedname_initname(&fn);
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
for (;;) {
/* Check for options */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (strcmp(ptr, "--") == 0) {
break;
} else if (argcheck(ptr, "dump")) {
dump = true;
} else if (argcheck(ptr, "remove")) {
ntattl = 0;
ttlset = true;
} else if (argcheck(ptr, "force")) {
force = true;
continue;
} else if (argcheck(ptr, "lifetime")) {
isc_textregion_t tr;
ptr = next_token(lex, text);
if (ptr == NULL) {
msg = "No lifetime specified";
CHECK(ISC_R_UNEXPECTEDEND);
}
tr.base = ptr;
tr.length = strlen(ptr);
result = dns_ttl_fromtext(&tr, &ntattl);
if (result != ISC_R_SUCCESS) {
msg = "could not parse NTA lifetime";
CHECK(result);
}
if (ntattl > 604800) {
msg = "NTA lifetime cannot exceed one week";
CHECK(ISC_R_RANGE);
}
ttlset = true;
continue;
} else if (argcheck(ptr, "class")) {
isc_textregion_t tr;
ptr = next_token(lex, text);
if (ptr == NULL) {
msg = "No class specified";
CHECK(ISC_R_UNEXPECTEDEND);
}
tr.base = ptr;
tr.length = strlen(ptr);
CHECK(dns_rdataclass_fromtext(&rdclass, &tr));
continue;
} else if (ptr[0] == '-') {
msg = "Unknown option";
CHECK(DNS_R_SYNTAX);
} else {
nametext = ptr;
}
break;
}
/*
* If -dump was specified, list NTA's and return
*/
if (dump) {
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (ntatable != NULL) {
dns_ntatable_detach(&ntatable);
}
result = dns_view_getntatable(view, &ntatable);
if (result == ISC_R_NOTFOUND) {
continue;
}
CHECK(dns_ntatable_totext(ntatable, view->name, text));
}
CHECK(putnull(text));
goto cleanup;
}
if (readonly) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_CONTROL, ISC_LOG_INFO,
"rejecting restricted control channel "
"NTA command");
CHECK(ISC_R_FAILURE);
}
/* Get the NTA name if not found above. */
if (nametext == NULL) {
nametext = next_token(lex, text);
}
if (nametext == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Copy nametext as it'll be overwritten by next_token() */
strlcpy(namebuf, nametext, DNS_NAME_FORMATSIZE);
if (strcmp(namebuf, ".") == 0) {
ntaname = dns_rootname;
} else {
isc_buffer_t b;
isc_buffer_init(&b, namebuf, strlen(namebuf));
isc_buffer_add(&b, strlen(namebuf));
CHECK(dns_name_fromtext(fname, &b, dns_rootname, 0, NULL));
ntaname = fname;
}
/* Look for the view name. */
viewname = next_token(lex, text);
if (viewname != NULL) {
strlcpy(viewbuf, viewname, DNS_NAME_FORMATSIZE);
viewname = viewbuf;
}
if (next_token(lex, text) != NULL) {
CHECK(DNS_R_SYNTAX);
}
isc_stdtime_get(&now);
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
excl = true;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (viewname != NULL && strcmp(view->name, viewname) != 0) {
continue;
}
viewfound = true;
if (view->rdclass != rdclass && rdclass != dns_rdataclass_any) {
continue;
}
if (view->nta_lifetime == 0) {
continue;
}
if (!ttlset) {
ntattl = view->nta_lifetime;
}
if (ntatable != NULL) {
dns_ntatable_detach(&ntatable);
}
result = dns_view_getntatable(view, &ntatable);
if (result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
continue;
}
result = dns_view_flushnode(view, ntaname, true);
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"flush tree '%s' in cache view '%s': %s", namebuf,
view->name, isc_result_totext(result));
if (ntattl != 0) {
CHECK(dns_ntatable_add(ntatable, ntaname, force, now,
ntattl));
when = now + ntattl;
isc_time_set(&t, when, 0);
isc_time_formattimestamp(&t, tbuf, sizeof(tbuf));
if (!first) {
CHECK(putstr(text, "\n"));
}
first = false;
CHECK(putstr(text, "Negative trust anchor added: "));
CHECK(putstr(text, namebuf));
CHECK(putstr(text, "/"));
CHECK(putstr(text, view->name));
CHECK(putstr(text, ", expires "));
CHECK(putstr(text, tbuf));
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"added NTA '%s' (%d sec) in view '%s'",
namebuf, ntattl, view->name);
} else {
bool wasremoved;
result = dns_ntatable_delete(ntatable, ntaname);
if (result == ISC_R_SUCCESS) {
wasremoved = true;
} else if (result == ISC_R_NOTFOUND) {
wasremoved = false;
} else {
goto cleanup;
}
if (!first) {
CHECK(putstr(text, "\n"));
}
first = false;
CHECK(putstr(text, "Negative trust anchor "));
CHECK(putstr(text,
wasremoved ? "removed: " : "not found: "));
CHECK(putstr(text, namebuf));
CHECK(putstr(text, "/"));
CHECK(putstr(text, view->name));
if (wasremoved) {
isc_log_write(
named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
"removed NTA '%s' in view %s", namebuf,
view->name);
}
}
result = dns_view_saventa(view);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"error writing NTA file "
"for view '%s': %s",
view->name, isc_result_totext(result));
}
}
if (!viewfound) {
msg = "No such view";
CHECK(ISC_R_NOTFOUND);
}
(void)putnull(text);
cleanup:
if (msg != NULL) {
(void)putstr(text, msg);
(void)putnull(text);
}
if (excl) {
isc_task_endexclusive(server->task);
}
if (ntatable != NULL) {
dns_ntatable_detach(&ntatable);
}
return (result);
}
isc_result_t
named_server_saventa(named_server_t *server) {
dns_view_t *view;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
isc_result_t result = dns_view_saventa(view);
if (result != ISC_R_SUCCESS) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"error writing NTA file "
"for view '%s': %s",
view->name, isc_result_totext(result));
}
}
return (ISC_R_SUCCESS);
}
isc_result_t
named_server_loadnta(named_server_t *server) {
dns_view_t *view;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
isc_result_t result = dns_view_loadnta(view);
if ((result != ISC_R_SUCCESS) &&
(result != ISC_R_FILENOTFOUND) &&
(result != ISC_R_NOTFOUND))
{
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"error loading NTA file "
"for view '%s': %s",
view->name, isc_result_totext(result));
}
}
return (ISC_R_SUCCESS);
}
static isc_result_t
mkey_refresh(dns_view_t *view, isc_buffer_t **text) {
isc_result_t result;
char msg[DNS_NAME_FORMATSIZE + 500] = "";
snprintf(msg, sizeof(msg), "refreshing managed keys for '%s'",
view->name);
CHECK(putstr(text, msg));
CHECK(dns_zone_synckeyzone(view->managed_keys));
cleanup:
return (result);
}
static isc_result_t
mkey_destroy(named_server_t *server, dns_view_t *view, isc_buffer_t **text) {
isc_result_t result;
char msg[DNS_NAME_FORMATSIZE + 500] = "";
bool exclusive = false;
const char *file = NULL;
dns_db_t *dbp = NULL;
dns_zone_t *mkzone = NULL;
bool removed_a_file = false;
if (view->managed_keys == NULL) {
CHECK(ISC_R_NOTFOUND);
}
snprintf(msg, sizeof(msg), "destroying managed-keys database for '%s'",
view->name);
CHECK(putstr(text, msg));
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
exclusive = true;
/* Remove and clean up managed keys zone from view */
mkzone = view->managed_keys;
view->managed_keys = NULL;
(void)dns_zone_flush(mkzone);
/* Unload zone database */
if (dns_zone_getdb(mkzone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(mkzone);
}
/* Delete files */
file = dns_zone_getfile(mkzone);
result = isc_file_remove(file);
if (result == ISC_R_SUCCESS) {
removed_a_file = true;
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"file %s not removed: %s", file,
isc_result_totext(result));
}
file = dns_zone_getjournal(mkzone);
result = isc_file_remove(file);
if (result == ISC_R_SUCCESS) {
removed_a_file = true;
} else {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"file %s not removed: %s", file,
isc_result_totext(result));
}
if (!removed_a_file) {
CHECK(putstr(text, "error: no files could be removed"));
CHECK(ISC_R_FAILURE);
}
dns_zone_detach(&mkzone);
result = ISC_R_SUCCESS;
cleanup:
if (exclusive) {
isc_task_endexclusive(server->task);
}
return (result);
}
static isc_result_t
mkey_dumpzone(dns_view_t *view, isc_buffer_t **text) {
isc_result_t result;
dns_db_t *db = NULL;
dns_dbversion_t *ver = NULL;
dns_rriterator_t rrit;
isc_stdtime_t now;
dns_name_t *prevname = NULL;
isc_stdtime_get(&now);
CHECK(dns_zone_getdb(view->managed_keys, &db));
dns_db_currentversion(db, &ver);
dns_rriterator_init(&rrit, db, ver, 0);
for (result = dns_rriterator_first(&rrit); result == ISC_R_SUCCESS;
result = dns_rriterator_nextrrset(&rrit))
{
char buf[DNS_NAME_FORMATSIZE + 500];
dns_name_t *name = NULL;
dns_rdataset_t *kdset = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_keydata_t kd;
uint32_t ttl;
dns_rriterator_current(&rrit, &name, &ttl, &kdset, NULL);
if (kdset == NULL || kdset->type != dns_rdatatype_keydata ||
!dns_rdataset_isassociated(kdset))
{
continue;
}
if (name != prevname) {
char nbuf[DNS_NAME_FORMATSIZE];
dns_name_format(name, nbuf, sizeof(nbuf));
snprintf(buf, sizeof(buf), "\n\n name: %s", nbuf);
CHECK(putstr(text, buf));
}
for (result = dns_rdataset_first(kdset);
result == ISC_R_SUCCESS; result = dns_rdataset_next(kdset))
{
char alg[DNS_SECALG_FORMATSIZE];
char tbuf[ISC_FORMATHTTPTIMESTAMP_SIZE];
dns_keytag_t keyid;
isc_region_t r;
isc_time_t t;
bool revoked;
dns_rdata_reset(&rdata);
dns_rdataset_current(kdset, &rdata);
result = dns_rdata_tostruct(&rdata, &kd, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_toregion(&rdata, &r);
isc_region_consume(&r, 12);
keyid = dst_region_computeid(&r);
snprintf(buf, sizeof(buf), "\n keyid: %u", keyid);
CHECK(putstr(text, buf));
dns_secalg_format(kd.algorithm, alg, sizeof(alg));
snprintf(buf, sizeof(buf), "\n\talgorithm: %s", alg);
CHECK(putstr(text, buf));
revoked = ((kd.flags & DNS_KEYFLAG_REVOKE) != 0);
snprintf(buf, sizeof(buf), "\n\tflags:%s%s%s",
revoked ? " REVOKE" : "",
((kd.flags & DNS_KEYFLAG_KSK) != 0) ? " SEP"
: "",
(kd.flags == 0) ? " (none)" : "");
CHECK(putstr(text, buf));
isc_time_set(&t, kd.refresh, 0);
isc_time_formathttptimestamp(&t, tbuf, sizeof(tbuf));
snprintf(buf, sizeof(buf), "\n\tnext refresh: %s",
tbuf);
CHECK(putstr(text, buf));
if (kd.removehd != 0) {
isc_time_set(&t, kd.removehd, 0);
isc_time_formathttptimestamp(&t, tbuf,
sizeof(tbuf));
snprintf(buf, sizeof(buf), "\n\tremove at: %s",
tbuf);
CHECK(putstr(text, buf));
}
isc_time_set(&t, kd.addhd, 0);
isc_time_formathttptimestamp(&t, tbuf, sizeof(tbuf));
if (kd.addhd == 0) {
snprintf(buf, sizeof(buf), "\n\tno trust");
} else if (revoked) {
snprintf(buf, sizeof(buf), "\n\ttrust revoked");
} else if (kd.addhd <= now) {
snprintf(buf, sizeof(buf),
"\n\ttrusted since: %s", tbuf);
} else if (kd.addhd > now) {
snprintf(buf, sizeof(buf),
"\n\ttrust pending: %s", tbuf);
}
CHECK(putstr(text, buf));
}
}
if (result == ISC_R_NOMORE) {
result = ISC_R_SUCCESS;
}
cleanup:
if (ver != NULL) {
dns_rriterator_destroy(&rrit);
dns_db_closeversion(db, &ver, false);
}
if (db != NULL) {
dns_db_detach(&db);
}
return (result);
}
static isc_result_t
mkey_status(dns_view_t *view, isc_buffer_t **text) {
isc_result_t result;
char msg[ISC_FORMATHTTPTIMESTAMP_SIZE];
isc_time_t t;
CHECK(putstr(text, "view: "));
CHECK(putstr(text, view->name));
CHECK(putstr(text, "\nnext scheduled event: "));
dns_zone_getrefreshkeytime(view->managed_keys, &t);
if (isc_time_isepoch(&t)) {
CHECK(putstr(text, "never"));
} else {
isc_time_formathttptimestamp(&t, msg, sizeof(msg));
CHECK(putstr(text, msg));
}
CHECK(mkey_dumpzone(view, text));
cleanup:
return (result);
}
isc_result_t
named_server_mkeys(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
char *cmd, *classtxt, *viewtxt = NULL;
isc_result_t result = ISC_R_SUCCESS;
dns_view_t *view = NULL;
dns_rdataclass_t rdclass;
char msg[DNS_NAME_FORMATSIZE + 500] = "";
enum { NONE, STATUS, REFRESH, SYNC, DESTROY } opt = NONE;
bool found = false;
bool first = true;
/* Skip rndc command name */
cmd = next_token(lex, text);
if (cmd == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* Get managed-keys subcommand */
cmd = next_token(lex, text);
if (cmd == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (strcasecmp(cmd, "status") == 0) {
opt = STATUS;
} else if (strcasecmp(cmd, "refresh") == 0) {
opt = REFRESH;
} else if (strcasecmp(cmd, "sync") == 0) {
opt = SYNC;
} else if (strcasecmp(cmd, "destroy") == 0) {
opt = DESTROY;
} else {
snprintf(msg, sizeof(msg), "unknown command '%s'", cmd);
(void)putstr(text, msg);
result = ISC_R_UNEXPECTED;
goto cleanup;
}
/* Look for the optional class name. */
classtxt = next_token(lex, text);
if (classtxt != NULL) {
isc_textregion_t r;
r.base = classtxt;
r.length = strlen(classtxt);
result = dns_rdataclass_fromtext(&rdclass, &r);
if (result != ISC_R_SUCCESS) {
snprintf(msg, sizeof(msg), "unknown class '%s'",
classtxt);
(void)putstr(text, msg);
goto cleanup;
}
viewtxt = next_token(lex, text);
}
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (viewtxt != NULL && (rdclass != view->rdclass ||
strcmp(view->name, viewtxt) != 0))
{
continue;
}
if (view->managed_keys == NULL) {
if (viewtxt != NULL) {
snprintf(msg, sizeof(msg),
"view '%s': no managed keys", viewtxt);
CHECK(putstr(text, msg));
goto cleanup;
} else {
continue;
}
}
found = true;
switch (opt) {
case REFRESH:
if (!first) {
CHECK(putstr(text, "\n"));
}
CHECK(mkey_refresh(view, text));
break;
case STATUS:
if (!first) {
CHECK(putstr(text, "\n\n"));
}
CHECK(mkey_status(view, text));
break;
case SYNC:
CHECK(dns_zone_flush(view->managed_keys));
break;
case DESTROY:
if (!first) {
CHECK(putstr(text, "\n"));
}
CHECK(mkey_destroy(server, view, text));
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
if (viewtxt != NULL) {
break;
}
first = false;
}
if (!found) {
CHECK(putstr(text, "no views with managed keys"));
}
cleanup:
if (isc_buffer_usedlength(*text) > 0) {
(void)putnull(text);
}
return (result);
}
isc_result_t
named_server_dnstap(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
#ifdef HAVE_DNSTAP
char *ptr;
isc_result_t result;
bool reopen = false;
int backups = 0;
if (server->dtenv == NULL) {
return (ISC_R_NOTFOUND);
}
/* Check the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
/* "dnstap-reopen" was used in 9.11.0b1 */
if (strcasecmp(ptr, "dnstap-reopen") == 0) {
reopen = true;
} else {
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
}
if (reopen || strcasecmp(ptr, "-reopen") == 0) {
backups = ISC_LOG_ROLLNEVER;
} else if ((strcasecmp(ptr, "-roll") == 0)) {
unsigned int n;
ptr = next_token(lex, text);
if (ptr != NULL) {
unsigned int u;
n = sscanf(ptr, "%u", &u);
if (n != 1U || u > INT_MAX) {
return (ISC_R_BADNUMBER);
}
backups = u;
} else {
backups = ISC_LOG_ROLLINFINITE;
}
} else {
return (DNS_R_SYNTAX);
}
result = dns_dt_reopen(server->dtenv, backups);
return (result);
#else /* ifdef HAVE_DNSTAP */
UNUSED(server);
UNUSED(lex);
UNUSED(text);
return (ISC_R_NOTIMPLEMENTED);
#endif /* ifdef HAVE_DNSTAP */
}
isc_result_t
named_server_tcptimeouts(isc_lex_t *lex, isc_buffer_t **text) {
char *ptr;
isc_result_t result = ISC_R_SUCCESS;
unsigned int initial, idle, keepalive, advertised;
char msg[128];
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
isc_nm_tcp_gettimeouts(named_g_nm, &initial, &idle, &keepalive,
&advertised);
/* Look for optional arguments. */
ptr = next_token(lex, NULL);
if (ptr != NULL) {
CHECK(isc_parse_uint32(&initial, ptr, 10));
if (initial > 1200) {
CHECK(ISC_R_RANGE);
}
if (initial < 25) {
CHECK(ISC_R_RANGE);
}
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
CHECK(isc_parse_uint32(&idle, ptr, 10));
if (idle > 1200) {
CHECK(ISC_R_RANGE);
}
if (idle < 1) {
CHECK(ISC_R_RANGE);
}
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
CHECK(isc_parse_uint32(&keepalive, ptr, 10));
if (keepalive > MAX_TCP_TIMEOUT) {
CHECK(ISC_R_RANGE);
}
if (keepalive < 1) {
CHECK(ISC_R_RANGE);
}
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
CHECK(isc_parse_uint32(&advertised, ptr, 10));
if (advertised > MAX_TCP_TIMEOUT) {
CHECK(ISC_R_RANGE);
}
result = isc_task_beginexclusive(named_g_server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
isc_nm_tcp_settimeouts(named_g_nm, initial, idle, keepalive,
advertised);
isc_task_endexclusive(named_g_server->task);
}
snprintf(msg, sizeof(msg), "tcp-initial-timeout=%u\n", initial);
CHECK(putstr(text, msg));
snprintf(msg, sizeof(msg), "tcp-idle-timeout=%u\n", idle);
CHECK(putstr(text, msg));
snprintf(msg, sizeof(msg), "tcp-keepalive-timeout=%u\n", keepalive);
CHECK(putstr(text, msg));
snprintf(msg, sizeof(msg), "tcp-advertised-timeout=%u", advertised);
CHECK(putstr(text, msg));
cleanup:
if (isc_buffer_usedlength(*text) > 0) {
(void)putnull(text);
}
return (result);
}
isc_result_t
named_server_servestale(named_server_t *server, isc_lex_t *lex,
isc_buffer_t **text) {
char *ptr, *classtxt, *viewtxt = NULL;
char msg[128];
dns_rdataclass_t rdclass = dns_rdataclass_in;
dns_view_t *view;
bool found = false;
dns_stale_answer_t staleanswersok = dns_stale_answer_conf;
bool wantstatus = false;
isc_result_t result = ISC_R_SUCCESS;
bool exclusive = false;
/* Skip the command name. */
ptr = next_token(lex, text);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
ptr = next_token(lex, NULL);
if (ptr == NULL) {
return (ISC_R_UNEXPECTEDEND);
}
if (!strcasecmp(ptr, "on") || !strcasecmp(ptr, "yes") ||
!strcasecmp(ptr, "enable") || !strcasecmp(ptr, "true"))
{
staleanswersok = dns_stale_answer_yes;
} else if (!strcasecmp(ptr, "off") || !strcasecmp(ptr, "no") ||
!strcasecmp(ptr, "disable") || !strcasecmp(ptr, "false"))
{
staleanswersok = dns_stale_answer_no;
} else if (strcasecmp(ptr, "reset") == 0) {
staleanswersok = dns_stale_answer_conf;
} else if (!strcasecmp(ptr, "check") || !strcasecmp(ptr, "status")) {
wantstatus = true;
} else {
return (DNS_R_SYNTAX);
}
/* Look for the optional class name. */
classtxt = next_token(lex, text);
if (classtxt != NULL) {
isc_textregion_t r;
/* Look for the optional view name. */
viewtxt = next_token(lex, text);
/*
* If 'classtext' is not a valid class then it us a view name.
*/
r.base = classtxt;
r.length = strlen(classtxt);
result = dns_rdataclass_fromtext(&rdclass, &r);
if (result != ISC_R_SUCCESS) {
if (viewtxt != NULL) {
snprintf(msg, sizeof(msg), "unknown class '%s'",
classtxt);
(void)putstr(text, msg);
goto cleanup;
}
viewtxt = classtxt;
classtxt = NULL;
}
}
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
exclusive = true;
for (view = ISC_LIST_HEAD(server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
dns_ttl_t stale_ttl = 0;
dns_db_t *db = NULL;
if (classtxt != NULL && rdclass != view->rdclass) {
continue;
}
if (viewtxt != NULL && strcmp(view->name, viewtxt) != 0) {
continue;
}
if (!wantstatus) {
view->staleanswersok = staleanswersok;
found = true;
continue;
}
db = NULL;
dns_db_attach(view->cachedb, &db);
(void)dns_db_getservestalettl(db, &stale_ttl);
dns_db_detach(&db);
if (found) {
CHECK(putstr(text, "\n"));
}
CHECK(putstr(text, view->name));
CHECK(putstr(text, ": "));
switch (view->staleanswersok) {
case dns_stale_answer_yes:
if (stale_ttl > 0) {
CHECK(putstr(text, "on (rndc)"));
} else {
CHECK(putstr(text, "off (not-cached)"));
}
break;
case dns_stale_answer_no:
CHECK(putstr(text, "off (rndc)"));
break;
case dns_stale_answer_conf:
if (view->staleanswersenable && stale_ttl > 0) {
CHECK(putstr(text, "on"));
} else if (view->staleanswersenable) {
CHECK(putstr(text, "off (not-cached)"));
} else {
CHECK(putstr(text, "off"));
}
break;
}
if (stale_ttl > 0) {
snprintf(msg, sizeof(msg),
" (stale-answer-ttl=%u max-stale-ttl=%u)",
view->staleanswerttl, stale_ttl);
CHECK(putstr(text, msg));
}
found = true;
}
if (!found) {
result = ISC_R_NOTFOUND;
}
cleanup:
if (exclusive) {
isc_task_endexclusive(named_g_server->task);
}
if (isc_buffer_usedlength(*text) > 0) {
(void)putnull(text);
}
return (result);
}
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