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1999-12-03  Andreas Jaeger  <aj@suse.de>

	* nss/getXXbyYY.c: Include <resolv.h>
	(FUNCTION_NAME): Use res_ninit instead of res_init.

	* nss/getXXbyYY_r.c [NEED__RES]: Include <resolv.h> for _res
	declaration and prototypes.
	Remove extra _res declaration.
	(INTERNAL): Use thread aware res_ninit function.

	* inet/gethstbyad_r.c: Include <resolv.h>.

	* resolv/res_data.c: Update from Bind 8.2.2-P5.  Moved res_init to
	res_libc.c.  Disabled unneeded functions.

	* resolv/res_libc.c: New file.

	* Versions.def: Add version GLIBC_2.2 for libpthread.
	Add versions GLIBC_2.1 and GLIBC_2.2 for libresolv.

	* include/resolv.h: Add internal interfaces.

	* resolv/Makefile (routines): Add new files.
	(libresolv-routines): Likewise.
	(distribute): Likewise.

	* resolv/gethnamaddr.c: Use thread safe resolver functions.
	* resolv/nss_dns/dns-host.c: Likewise.
	* resolv/nss_dns/dns-network.c: Likewise.

	* resolv/arpa/nameser.h: Update from Bind 8.2.2-P5.
	* resolv/nsap_addr.c: Likewise.
	* resolv/res_comp.c: Likewise.
	* resolv/res_debug.c: Likewise.
	* resolv/res_init.c: Likewise.
	* resolv/res_mkquery.c: Likewise.
	* resolv/res_query.c: Likewise.
	* resolv/res_send.c: Likewise.
	* resolv/resolv.h: Likewise.

	* resolv/Versions: Add __res_state and __res_ninit with version
	GLIBC_2.2 to libc.
	Add new interfaces with version GLIBC_2.2 to libresolv.

	* resolv/Banner: Update.

	* include/arpa/nameser_compat.h: New file.

	* resolv/ns_name.c: New file from Bind 8.2.2-P5.
	* resolv/ns_netint.c: Likewise.
	* resolv/ns_parse.c: Likewise.
	* resolv/ns_print.c: Likewise.
	* resolv/ns_samedomain.c: Likewise.
	* resolv/ns_ttl.c: Likewise.
	* resolv/arpa/nameser_compat.h: Likewise.
	* resolv/res_debug.h: Likewise.

	Some patches are based on work done by Adam D. Bradley
	<artdodge@cs.bu.edu>.

	* sysdeps/unix/sysv/linux/configure.in: Remove check for ldconfig,
	set always use_ldconfig instead.
This commit is contained in:
Ulrich Drepper
1999-12-04 18:05:55 +00:00
parent 591e1ffbf8
commit b43b13ac25
42 changed files with 4869 additions and 3113 deletions
Download Patch File Download Diff File Expand all files Collapse all files

436
resolv/res_init.c
View File

@ -1,6 +1,4 @@
/*
* ++Copyright++ 1985, 1989, 1993
* -
* Copyright (c) 1985, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
@ -27,7 +25,9 @@
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* -
*/
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
@ -45,68 +45,55 @@
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
* -
* --Copyright--
*/
/*
* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
static char rcsid[] = "$Id$";
static const char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
static const char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <stdio.h>
#include <ctype.h>
#include <resolv.h>
#if defined(BSD) && (BSD >= 199103)
# include <unistd.h>
# include <stdlib.h>
# include <string.h>
#else
# include "../conf/portability.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/*-------------------------------------- info about "sortlist" --------------
* Marc Majka 1994/04/16
* Allan Nathanson 1994/10/29 (BIND 4.9.3.x)
*
* NetInfo resolver configuration directory support.
*
* Allow a NetInfo directory to be created in the hierarchy which
* contains the same information as the resolver configuration file.
*
* - The local domain name is stored as the value of the "domain" property.
* - The Internet address(es) of the name server(s) are stored as values
* of the "nameserver" property.
* - The name server addresses are stored as values of the "nameserver"
* property.
* - The search list for host-name lookup is stored as values of the
* "search" property.
* - The sortlist comprised of IP address netmask pairs are stored as
* values of the "sortlist" property. The IP address and optional netmask
* should be separated by a slash (/) or ampersand (&) character.
* - Internal resolver variables can be set from the value of the "options"
* property.
*/
#if defined(NeXT)
# include <netinfo/ni.h>
# define NI_PATH_RESCONF "/locations/resolver"
# define NI_TIMEOUT 10
static int netinfo_res_init __P((int *haveenv, int *havesearch));
#endif
/* Options. Should all be left alone. */
#define RESOLVSORT
#define RFC1535
#undef DEBUG
#if defined(USE_OPTIONS_H)
# include "../conf/options.h"
#endif
static void
res_setoptions (res_state statp, const char *options, const char *source)
internal_function;
static void res_setoptions __P((char *, char *)) internal_function;
#ifdef RESOLVSORT
static const char sort_mask[] = "/&";
@ -122,12 +109,6 @@ static u_int32_t net_mask __P((struct in_addr));
* Resolver state default settings.
*/
struct __res_state _res
# if defined(__BIND_RES_TEXT)
= { RES_TIMEOUT, } /* Motorola, et al. */
# endif
;
/*
* Set up default settings. If the configuration file exist, the values
* there will have precedence. Otherwise, the server address is set to
@ -138,7 +119,7 @@ struct __res_state _res
* since it was noted that INADDR_ANY actually meant ``the first interface
* you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
* it had to be "up" in order for you to reach your own name server. It
* was later decided that since the recommended practice is to always
* was later decided that since the recommended practice is to always
* install local static routes through 127.0.0.1 for all your network
* interfaces, that we could solve this problem without a code change.
*
@ -150,12 +131,19 @@ struct __res_state _res
* Return 0 if completes successfully, -1 on error
*/
int
res_init()
{
res_ninit(res_state statp) {
extern int __res_vinit(res_state, int);
return (__res_vinit(statp, 0));
}
/* This function has to be reachable by res_data.c but not publically. */
int
__res_vinit(res_state statp, int preinit) {
register FILE *fp;
register char *cp, **pp;
register int n;
char buf[MAXDNAME];
char buf[BUFSIZ];
int nserv = 0; /* number of nameserver records read from file */
int haveenv = 0;
int havesearch = 0;
@ -167,54 +155,32 @@ res_init()
int dots;
#endif
/*
* These three fields used to be statically initialized. This made
* it hard to use this code in a shared library. It is necessary,
* now that we're doing dynamic initialization here, that we preserve
* the old semantics: if an application modifies one of these three
* fields of _res before res_init() is called, res_init() will not
* alter them. Of course, if an application is setting them to
* _zero_ before calling res_init(), hoping to override what used
* to be the static default, we can't detect it and unexpected results
* will follow. Zero for any of these fields would make no sense,
* so one can safely assume that the applications were already getting
* unexpected results.
*
* _res.options is tricky since some apps were known to diddle the bits
* before res_init() was first called. We can't replicate that semantic
* with dynamic initialization (they may have turned bits off that are
* set in RES_DEFAULT). Our solution is to declare such applications
* "broken". They could fool us by setting RES_INIT but none do (yet).
*/
if (!_res.retrans)
_res.retrans = RES_TIMEOUT;
if (!_res.retry)
_res.retry = 4;
if (!(_res.options & RES_INIT))
_res.options = RES_DEFAULT;
/*
* This one used to initialize implicitly to zero, so unless the app
* has set it to something in particular, we can randomize it now.
*/
if (!_res.id)
_res.id = res_randomid();
if (!preinit) {
statp->retrans = RES_TIMEOUT;
statp->retry = RES_DFLRETRY;
statp->options = RES_DEFAULT;
statp->id = res_randomid();
}
#ifdef USELOOPBACK
_res.nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
_res.nscount = 1;
statp->nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
#else
_res.nsaddr.sin_addr.s_addr = INADDR_ANY;
_res.nscount = 0;
statp->nsaddr.sin_addr.s_addr = INADDR_ANY;
#endif
_res.nsaddr.sin_family = AF_INET;
_res.nsaddr.sin_port = htons(NAMESERVER_PORT);
_res.ndots = 1;
_res.pfcode = 0;
statp->nsaddr.sin_family = AF_INET;
statp->nsaddr.sin_port = htons(NAMESERVER_PORT);
statp->nscount = 1;
statp->ndots = 1;
statp->pfcode = 0;
statp->_sock = -1;
statp->_flags = 0;
statp->qhook = NULL;
statp->rhook = NULL;
/* Allow user to override the local domain definition */
if ((cp = __secure_getenv("LOCALDOMAIN")) != NULL) {
(void)strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
(void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
haveenv++;
/*
@ -224,10 +190,10 @@ res_init()
* one that they want to use as an individual (even more
* important now that the rfc1535 stuff restricts searches)
*/
cp = _res.defdname;
pp = _res.dnsrch;
cp = statp->defdname;
pp = statp->dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
if (*cp == '\n') /* silly backwards compat */
break;
else if (*cp == ' ' || *cp == '\t') {
@ -251,9 +217,6 @@ res_init()
(line[sizeof(name) - 1] == ' ' || \
line[sizeof(name) - 1] == '\t'))
#ifdef NeXT
if (netinfo_res_init(&haveenv, &havesearch) == 0)
#endif
if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
/* read the config file */
while (fgets_unlocked(buf, sizeof(buf), fp) != NULL) {
@ -269,8 +232,9 @@ res_init()
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
*cp = '\0';
havesearch = 0;
continue;
@ -284,16 +248,18 @@ res_init()
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
*__strchrnul (_res.defdname, '\n') = '\0';
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
if ((cp = strchr(statp->defdname, '\n')) != NULL)
*cp = '\0';
/*
* Set search list to be blank-separated strings
* on rest of line.
*/
cp = _res.defdname;
pp = _res.dnsrch;
cp = statp->defdname;
pp = statp->dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
if (*cp == ' ' || *cp == '\t') {
*cp = 0;
n = 1;
@ -318,9 +284,9 @@ res_init()
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp != '\0') && (*cp != '\n') && inet_aton(cp, &a)) {
_res.nsaddr_list[nserv].sin_addr = a;
_res.nsaddr_list[nserv].sin_family = AF_INET;
_res.nsaddr_list[nserv].sin_port =
statp->nsaddr_list[nserv].sin_addr = a;
statp->nsaddr_list[nserv].sin_family = AF_INET;
statp->nsaddr_list[nserv].sin_port =
htons(NAMESERVER_PORT);
nserv++;
}
@ -343,7 +309,7 @@ res_init()
n = *cp;
*cp = 0;
if (inet_aton(net, &a)) {
_res.sort_list[nsort].addr = a;
statp->sort_list[nsort].addr = a;
if (ISSORTMASK(n)) {
*cp++ = n;
net = cp;
@ -353,14 +319,14 @@ res_init()
n = *cp;
*cp = 0;
if (inet_aton(net, &a)) {
_res.sort_list[nsort].mask = a.s_addr;
statp->sort_list[nsort].mask = a.s_addr;
} else {
_res.sort_list[nsort].mask =
net_mask(_res.sort_list[nsort].addr);
statp->sort_list[nsort].mask =
net_mask(statp->sort_list[nsort].addr);
}
} else {
_res.sort_list[nsort].mask =
net_mask(_res.sort_list[nsort].addr);
statp->sort_list[nsort].mask =
net_mask(statp->sort_list[nsort].addr);
}
nsort++;
}
@ -370,35 +336,35 @@ res_init()
}
#endif
if (MATCH(buf, "options")) {
res_setoptions(buf + sizeof("options") - 1, "conf");
res_setoptions(statp, buf + sizeof("options") - 1, "conf");
continue;
}
}
if (nserv > _res.nscount)
_res.nscount = nserv;
if (nserv > 1)
statp->nscount = nserv;
#ifdef RESOLVSORT
_res.nsort = nsort;
statp->nsort = nsort;
#endif
(void) fclose(fp);
}
if (_res.defdname[0] == 0 &&
__gethostname(buf, sizeof(_res.defdname) - 1) == 0 &&
if (statp->defdname[0] == 0 &&
__gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
(cp = strchr(buf, '.')) != NULL)
strcpy(_res.defdname, cp + 1);
strcpy(statp->defdname, cp + 1);
/* find components of local domain that might be searched */
if (havesearch == 0) {
pp = _res.dnsrch;
*pp++ = _res.defdname;
pp = statp->dnsrch;
*pp++ = statp->defdname;
*pp = NULL;
#ifndef RFC1535
dots = 0;
for (cp = _res.defdname; *cp; cp++)
for (cp = statp->defdname; *cp; cp++)
dots += (*cp == '.');
cp = _res.defdname;
while (pp < _res.dnsrch + MAXDFLSRCH) {
cp = statp->defdname;
while (pp < statp->dnsrch + MAXDFLSRCH) {
if (dots < LOCALDOMAINPARTS)
break;
cp = __rawmemchr(cp, '.') + 1; /* we know there is one */
@ -407,32 +373,31 @@ res_init()
}
*pp = NULL;
#ifdef DEBUG
if (_res.options & RES_DEBUG) {
if (statp->options & RES_DEBUG) {
printf(";; res_init()... default dnsrch list:\n");
for (pp = _res.dnsrch; *pp; pp++)
for (pp = statp->dnsrch; *pp; pp++)
printf(";;\t%s\n", *pp);
printf(";;\t..END..\n");
}
#endif /* DEBUG */
#endif
#endif /* !RFC1535 */
}
if ((cp = __secure_getenv("RES_OPTIONS")) != NULL)
res_setoptions(cp, "env");
_res.options |= RES_INIT;
res_setoptions(statp, cp, "env");
statp->options |= RES_INIT;
return (0);
}
static void
internal_function
res_setoptions(options, source)
char *options, *source;
res_setoptions(res_state statp, const char *options, const char *source)
{
char *cp = options;
const char *cp = options;
int i;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
if (statp->options & RES_DEBUG)
printf(";; res_setoptions(\"%s\", \"%s\")...\n",
options, source);
#endif
@ -444,24 +409,41 @@ res_setoptions(options, source)
if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
i = atoi(cp + sizeof("ndots:") - 1);
if (i <= RES_MAXNDOTS)
_res.ndots = i;
statp->ndots = i;
else
_res.ndots = RES_MAXNDOTS;
statp->ndots = RES_MAXNDOTS;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";;\tndots=%d\n", _res.ndots);
if (statp->options & RES_DEBUG)
printf(";;\tndots=%d\n", statp->ndots);
#endif
} else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) {
i = atoi(cp + sizeof("timeout:") - 1);
if (i <= RES_MAXRETRANS)
statp->retrans = i;
else
statp->retrans = RES_MAXRETRANS;
} else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){
i = atoi(cp + sizeof("attempts:") - 1);
if (i <= RES_MAXRETRY)
statp->retry = i;
else
statp->retry = RES_MAXRETRY;
} else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
#ifdef DEBUG
if (!(_res.options & RES_DEBUG)) {
if (!(statp->options & RES_DEBUG)) {
printf(";; res_setoptions(\"%s\", \"%s\")..\n",
options, source);
_res.options |= RES_DEBUG;
statp->options |= RES_DEBUG;
}
printf(";;\tdebug\n");
#endif
} else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
_res.options |= RES_USE_INET6;
statp->options |= RES_USE_INET6;
} else if (!strncmp(cp, "rotate", sizeof("rotate") - 1)) {
statp->options |= RES_ROTATE;
} else if (!strncmp(cp, "no-check-names",
sizeof("no-check-names") - 1)) {
statp->options |= RES_NOCHECKNAME;
} else {
/* XXX - print a warning here? */
}
@ -487,164 +469,8 @@ net_mask(in) /* XXX - should really use system's version of this */
}
#endif
#ifdef NeXT
static int
netinfo_res_init(haveenv, havesearch)
int *haveenv;
int *havesearch;
{
register int n;
void *domain, *parent;
ni_id dir;
ni_status status;
ni_namelist nl;
int nserv = 0;
#ifdef RESOLVSORT
int nsort = 0;
#endif
status = ni_open(NULL, ".", &domain);
if (status == NI_OK) {
ni_setreadtimeout(domain, NI_TIMEOUT);
ni_setabort(domain, 1);
/* climb the NetInfo hierarchy to find a resolver directory */
while (status == NI_OK) {
status = ni_pathsearch(domain, &dir, NI_PATH_RESCONF);
if (status == NI_OK) {
/* found a resolver directory */
if (*haveenv == 0) {
/* get the default domain name */
status = ni_lookupprop(domain, &dir, "domain", &nl);
if (status == NI_OK && nl.ni_namelist_len > 0) {
(void)strncpy(_res.defdname,
nl.ni_namelist_val[0],
sizeof(_res.defdname) - 1);
_res.defdname[sizeof(_res.defdname) - 1] = '\0';
ni_namelist_free(&nl);
*havesearch = 0;
}
/* get search list */
status = ni_lookupprop(domain, &dir, "search", &nl);
if (status == NI_OK && nl.ni_namelist_len > 0) {
(void)strncpy(_res.defdname,
nl.ni_namelist_val[0],
sizeof(_res.defdname) - 1);
_res.defdname[sizeof(_res.defdname) - 1] = '\0';
/* copy */
for (n = 0;
n < nl.ni_namelist_len && n < MAXDNSRCH;
n++) {
/* duplicate up to MAXDNSRCH servers */
char *cp = nl.ni_namelist_val[n];
_res.dnsrch[n] =
strcpy((char *)malloc(strlen(cp) + 1), cp);
}
ni_namelist_free(&nl);
*havesearch = 1;
}
}
/* get list of nameservers */
status = ni_lookupprop(domain, &dir, "nameserver", &nl);
if (status == NI_OK && nl.ni_namelist_len > 0) {
/* copy up to MAXNS servers */
for (n = 0;
n < nl.ni_namelist_len && nserv < MAXNS;
n++) {
struct in_addr a;
if (inet_aton(nl.ni_namelist_val[n], &a)) {
_res.nsaddr_list[nserv].sin_addr = a;
_res.nsaddr_list[nserv].sin_family = AF_INET;
_res.nsaddr_list[nserv].sin_port =
htons(NAMESERVER_PORT);
nserv++;
}
}
ni_namelist_free(&nl);
}
if (nserv > _res.nscount)
_res.nscount = nserv;
#ifdef RESOLVSORT
/* get sort order */
status = ni_lookupprop(domain, &dir, "sortlist", &nl);
if (status == NI_OK && nl.ni_namelist_len > 0) {
/* copy up to MAXRESOLVSORT address/netmask pairs */
for (n = 0;
n < nl.ni_namelist_len && nsort < MAXRESOLVSORT;
n++) {
char ch;
char *cp;
const char *sp;
struct in_addr a;
cp = NULL;
for (sp = sort_mask; *sp; sp++) {
char *cp1;
cp1 = strchr(nl.ni_namelist_val[n], *sp);
if (cp && cp1)
cp = (cp < cp1)? cp : cp1;
else if (cp1)
cp = cp1;
}
if (cp != NULL) {
ch = *cp;
*cp = '\0';
break;
}
if (inet_aton(nl.ni_namelist_val[n], &a)) {
_res.sort_list[nsort].addr = a;
if (*cp && ISSORTMASK(ch)) {
*cp++ = ch;
if (inet_aton(cp, &a)) {
_res.sort_list[nsort].mask = a.s_addr;
} else {
_res.sort_list[nsort].mask =
net_mask(_res.sort_list[nsort].addr);
}
} else {
_res.sort_list[nsort].mask =
net_mask(_res.sort_list[nsort].addr);
}
nsort++;
}
}
ni_namelist_free(&nl);
}
_res.nsort = nsort;
#endif
/* get resolver options */
status = ni_lookupprop(domain, &dir, "options", &nl);
if (status == NI_OK && nl.ni_namelist_len > 0) {
res_setoptions(nl.ni_namelist_val[0], "conf");
ni_namelist_free(&nl);
}
ni_free(domain);
return(1); /* using DNS configuration from NetInfo */
}
status = ni_open(domain, "..", &parent);
ni_free(domain);
if (status == NI_OK)
domain = parent;
}
}
return(0); /* if not using DNS configuration from NetInfo */
}
#endif /* NeXT */
u_int
res_randomid()
{
res_randomid(void) {
struct timeval now;
__gettimeofday(&now, NULL);