mirror of
https://sourceware.org/git/glibc.git
synced 2025-07-29 11:41:21 +03:00
resolv: Reformat res_vinit and related functions to GNU style
Also remove some obsolete comments.
This commit is contained in:
Florian Weimer
@ -1,3 +1,7 @@
|
|||||||
|
2017-06-19 Florian Weimer <fweimer@redhat.com>
|
||||||
|
|
||||||
|
* resolv/res_init.c: Reformat to GNU style.
|
||||||
|
|
||||||
2017-06-19 Florian Weimer <fweimer@redhat.com>
|
2017-06-19 Florian Weimer <fweimer@redhat.com>
|
||||||
|
|
||||||
* resolv/res_init.c (sort_mask_chars, ISSORTMASK): Remove.
|
* resolv/res_init.c (sort_mask_chars, ISSORTMASK): Remove.
|
||||||
|
|||||||
@ -1,3 +1,21 @@
|
|||||||
|
/* Resolver state initialization and resolv.conf parsing.
|
||||||
|
Copyright (C) 1995-2017 Free Software Foundation, Inc.
|
||||||
|
This file is part of the GNU C Library.
|
||||||
|
|
||||||
|
The GNU C Library is free software; you can redistribute it and/or
|
||||||
|
modify it under the terms of the GNU Lesser General Public
|
||||||
|
License as published by the Free Software Foundation; either
|
||||||
|
version 2.1 of the License, or (at your option) any later version.
|
||||||
|
|
||||||
|
The GNU C Library is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
Lesser General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU Lesser General Public
|
||||||
|
License along with the GNU C Library; if not, see
|
||||||
|
<http://www.gnu.org/licenses/>. */
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Copyright (c) 1985, 1989, 1993
|
* Copyright (c) 1985, 1989, 1993
|
||||||
* The Regents of the University of California. All rights reserved.
|
* The Regents of the University of California. All rights reserved.
|
||||||
@ -83,26 +101,15 @@
|
|||||||
#include <sys/types.h>
|
#include <sys/types.h>
|
||||||
#include <inet/net-internal.h>
|
#include <inet/net-internal.h>
|
||||||
|
|
||||||
static void res_setoptions (res_state, const char *, const char *)
|
static void res_setoptions (res_state, const char *, const char *);
|
||||||
internal_function;
|
static uint32_t net_mask (struct in_addr);
|
||||||
static u_int32_t net_mask (struct in_addr) __THROW;
|
|
||||||
|
|
||||||
unsigned long long int __res_initstamp attribute_hidden;
|
unsigned long long int __res_initstamp attribute_hidden;
|
||||||
|
|
||||||
/*
|
|
||||||
* Resolver state default settings.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Set up default settings. If the configuration file exist, the values
|
|
||||||
* there will have precedence. Otherwise, the server address is set to
|
|
||||||
* INADDR_LOOPBACK and the default domain name comes from gethostname.
|
|
||||||
*
|
|
||||||
* Return 0 if completes successfully, -1 on error
|
|
||||||
*/
|
|
||||||
int
|
int
|
||||||
res_ninit(res_state statp) {
|
res_ninit (res_state statp)
|
||||||
return (__res_vinit(statp, 0));
|
{
|
||||||
|
return __res_vinit (statp, 0);
|
||||||
}
|
}
|
||||||
libc_hidden_def (__res_ninit)
|
libc_hidden_def (__res_ninit)
|
||||||
|
|
||||||
@ -114,349 +121,374 @@ is_sort_mask (char ch)
|
|||||||
return ch == '/' || ch == '&';
|
return ch == '/' || ch == '&';
|
||||||
}
|
}
|
||||||
|
|
||||||
/* This function has to be reachable by res_data.c but not publically. */
|
/* Set up default settings. If the /etc/resolv.conf configuration
|
||||||
|
file exist, the values there will have precedence. Otherwise, the
|
||||||
|
server address is set to INADDR_LOOPBACK and the default domain
|
||||||
|
name comes from gethostname. The RES_OPTIONS and LOCALDOMAIN
|
||||||
|
environment variables can be used to override some settings.
|
||||||
|
Return 0 if completes successfully, -1 on error. */
|
||||||
int
|
int
|
||||||
__res_vinit(res_state statp, int preinit) {
|
__res_vinit (res_state statp, int preinit)
|
||||||
FILE *fp;
|
{
|
||||||
char *cp, **pp;
|
char *cp, **pp;
|
||||||
int n;
|
char buf[BUFSIZ];
|
||||||
char buf[BUFSIZ];
|
int nserv = 0; /* Number of nameservers read from file. */
|
||||||
int nserv = 0; /* number of nameservers read from file */
|
bool have_serv6 = false;
|
||||||
int have_serv6 = 0;
|
bool haveenv = false;
|
||||||
int haveenv = 0;
|
bool havesearch = false;
|
||||||
int havesearch = 0;
|
int nsort = 0;
|
||||||
int nsort = 0;
|
char *net;
|
||||||
char *net;
|
statp->_u._ext.initstamp = __res_initstamp;
|
||||||
statp->_u._ext.initstamp = __res_initstamp;
|
|
||||||
|
|
||||||
if (!preinit) {
|
if (!preinit)
|
||||||
statp->retrans = RES_TIMEOUT;
|
{
|
||||||
statp->retry = RES_DFLRETRY;
|
statp->retrans = RES_TIMEOUT;
|
||||||
statp->options = RES_DEFAULT;
|
statp->retry = RES_DFLRETRY;
|
||||||
statp->id = res_randomid();
|
statp->options = RES_DEFAULT;
|
||||||
}
|
statp->id = res_randomid ();
|
||||||
|
}
|
||||||
|
|
||||||
statp->nscount = 0;
|
statp->nscount = 0;
|
||||||
statp->defdname[0] = '\0';
|
statp->defdname[0] = '\0';
|
||||||
statp->ndots = 1;
|
statp->ndots = 1;
|
||||||
statp->pfcode = 0;
|
statp->pfcode = 0;
|
||||||
statp->_vcsock = -1;
|
statp->_vcsock = -1;
|
||||||
statp->_flags = 0;
|
statp->_flags = 0;
|
||||||
statp->__glibc_unused_qhook = NULL;
|
statp->__glibc_unused_qhook = NULL;
|
||||||
statp->__glibc_unused_rhook = NULL;
|
statp->__glibc_unused_rhook = NULL;
|
||||||
statp->_u._ext.nscount = 0;
|
statp->_u._ext.nscount = 0;
|
||||||
for (n = 0; n < MAXNS; n++)
|
for (int n = 0; n < MAXNS; n++)
|
||||||
statp->_u._ext.nsaddrs[n] = NULL;
|
statp->_u._ext.nsaddrs[n] = NULL;
|
||||||
|
|
||||||
/* Allow user to override the local domain definition */
|
/* Allow user to override the local domain definition. */
|
||||||
if ((cp = getenv("LOCALDOMAIN")) != NULL) {
|
if ((cp = getenv ("LOCALDOMAIN")) != NULL)
|
||||||
(void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
|
{
|
||||||
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
|
strncpy (statp->defdname, cp, sizeof (statp->defdname) - 1);
|
||||||
haveenv++;
|
statp->defdname[sizeof (statp->defdname) - 1] = '\0';
|
||||||
|
haveenv = true;
|
||||||
|
|
||||||
/*
|
/* Set search list to be blank-separated strings from rest of
|
||||||
* Set search list to be blank-separated strings
|
env value. Permits users of LOCALDOMAIN to still have a
|
||||||
* from rest of env value. Permits users of LOCALDOMAIN
|
search list, and anyone to set the one that they want to use
|
||||||
* to still have a search list, and anyone to set the
|
as an individual (even more important now that the rfc1535
|
||||||
* one that they want to use as an individual (even more
|
stuff restricts searches). */
|
||||||
* important now that the rfc1535 stuff restricts searches)
|
cp = statp->defdname;
|
||||||
*/
|
pp = statp->dnsrch;
|
||||||
cp = statp->defdname;
|
*pp++ = cp;
|
||||||
pp = statp->dnsrch;
|
for (int n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++)
|
||||||
*pp++ = cp;
|
{
|
||||||
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
|
if (*cp == '\n')
|
||||||
if (*cp == '\n') /* silly backwards compat */
|
break;
|
||||||
break;
|
else if (*cp == ' ' || *cp == '\t')
|
||||||
else if (*cp == ' ' || *cp == '\t') {
|
{
|
||||||
*cp = 0;
|
*cp = 0;
|
||||||
n = 1;
|
n = 1;
|
||||||
} else if (n) {
|
}
|
||||||
*pp++ = cp;
|
else if (n > 0)
|
||||||
n = 0;
|
{
|
||||||
havesearch = 1;
|
*pp++ = cp;
|
||||||
}
|
n = 0;
|
||||||
}
|
havesearch = true;
|
||||||
/* null terminate last domain if there are excess */
|
}
|
||||||
while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
|
}
|
||||||
cp++;
|
/* Null terminate last domain if there are excess. */
|
||||||
*cp = '\0';
|
while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
|
||||||
*pp++ = 0;
|
cp++;
|
||||||
}
|
*cp = '\0';
|
||||||
|
*pp++ = 0;
|
||||||
|
}
|
||||||
|
|
||||||
#define MATCH(line, name) \
|
#define MATCH(line, name) \
|
||||||
(!strncmp(line, name, sizeof(name) - 1) && \
|
(!strncmp (line, name, sizeof (name) - 1) \
|
||||||
(line[sizeof(name) - 1] == ' ' || \
|
&& (line[sizeof (name) - 1] == ' ' \
|
||||||
line[sizeof(name) - 1] == '\t'))
|
|| line[sizeof (name) - 1] == '\t'))
|
||||||
|
|
||||||
if ((fp = fopen(_PATH_RESCONF, "rce")) != NULL) {
|
FILE *fp = fopen (_PATH_RESCONF, "rce");
|
||||||
/* No threads use this stream. */
|
if (fp != NULL)
|
||||||
__fsetlocking (fp, FSETLOCKING_BYCALLER);
|
{
|
||||||
/* read the config file */
|
/* No threads use this stream. */
|
||||||
while (__fgets_unlocked(buf, sizeof(buf), fp) != NULL) {
|
__fsetlocking (fp, FSETLOCKING_BYCALLER);
|
||||||
/* skip comments */
|
/* Read the config file. */
|
||||||
if (*buf == ';' || *buf == '#')
|
while (__fgets_unlocked (buf, sizeof (buf), fp) != NULL)
|
||||||
continue;
|
{
|
||||||
/* read default domain name */
|
/* Skip comments. */
|
||||||
if (MATCH(buf, "domain")) {
|
if (*buf == ';' || *buf == '#')
|
||||||
if (haveenv) /* skip if have from environ */
|
continue;
|
||||||
continue;
|
/* Read default domain name. */
|
||||||
cp = buf + sizeof("domain") - 1;
|
if (MATCH (buf, "domain"))
|
||||||
while (*cp == ' ' || *cp == '\t')
|
{
|
||||||
cp++;
|
if (haveenv)
|
||||||
if ((*cp == '\0') || (*cp == '\n'))
|
/* LOCALDOMAIN overrides the configuration file. */
|
||||||
continue;
|
continue;
|
||||||
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
|
cp = buf + sizeof ("domain") - 1;
|
||||||
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
|
while (*cp == ' ' || *cp == '\t')
|
||||||
if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
|
cp++;
|
||||||
*cp = '\0';
|
if ((*cp == '\0') || (*cp == '\n'))
|
||||||
havesearch = 0;
|
continue;
|
||||||
continue;
|
strncpy (statp->defdname, cp, sizeof (statp->defdname) - 1);
|
||||||
}
|
statp->defdname[sizeof (statp->defdname) - 1] = '\0';
|
||||||
/* set search list */
|
if ((cp = strpbrk (statp->defdname, " \t\n")) != NULL)
|
||||||
if (MATCH(buf, "search")) {
|
*cp = '\0';
|
||||||
if (haveenv) /* skip if have from environ */
|
havesearch = false;
|
||||||
continue;
|
continue;
|
||||||
cp = buf + sizeof("search") - 1;
|
}
|
||||||
while (*cp == ' ' || *cp == '\t')
|
/* Set search list. */
|
||||||
cp++;
|
if (MATCH (buf, "search"))
|
||||||
if ((*cp == '\0') || (*cp == '\n'))
|
{
|
||||||
continue;
|
if (haveenv)
|
||||||
strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
|
/* LOCALDOMAIN overrides the configuration file. */
|
||||||
statp->defdname[sizeof(statp->defdname) - 1] = '\0';
|
continue;
|
||||||
if ((cp = strchr(statp->defdname, '\n')) != NULL)
|
cp = buf + sizeof ("search") - 1;
|
||||||
*cp = '\0';
|
while (*cp == ' ' || *cp == '\t')
|
||||||
/*
|
cp++;
|
||||||
* Set search list to be blank-separated strings
|
if ((*cp == '\0') || (*cp == '\n'))
|
||||||
* on rest of line.
|
continue;
|
||||||
*/
|
strncpy (statp->defdname, cp, sizeof (statp->defdname) - 1);
|
||||||
cp = statp->defdname;
|
statp->defdname[sizeof (statp->defdname) - 1] = '\0';
|
||||||
pp = statp->dnsrch;
|
if ((cp = strchr (statp->defdname, '\n')) != NULL)
|
||||||
*pp++ = cp;
|
*cp = '\0';
|
||||||
for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
|
/* Set search list to be blank-separated strings on rest
|
||||||
if (*cp == ' ' || *cp == '\t') {
|
of line. */
|
||||||
*cp = 0;
|
cp = statp->defdname;
|
||||||
n = 1;
|
pp = statp->dnsrch;
|
||||||
} else if (n) {
|
*pp++ = cp;
|
||||||
*pp++ = cp;
|
for (int n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++)
|
||||||
n = 0;
|
{
|
||||||
}
|
if (*cp == ' ' || *cp == '\t')
|
||||||
}
|
{
|
||||||
/* null terminate last domain if there are excess */
|
*cp = 0;
|
||||||
while (*cp != '\0' && *cp != ' ' && *cp != '\t')
|
n = 1;
|
||||||
cp++;
|
}
|
||||||
*cp = '\0';
|
else if (n)
|
||||||
*pp++ = 0;
|
{
|
||||||
havesearch = 1;
|
*pp++ = cp;
|
||||||
continue;
|
n = 0;
|
||||||
}
|
}
|
||||||
/* read nameservers to query */
|
}
|
||||||
if (MATCH(buf, "nameserver") && nserv < MAXNS) {
|
/* Null terminate last domain if there are excess. */
|
||||||
struct in_addr a;
|
while (*cp != '\0' && *cp != ' ' && *cp != '\t')
|
||||||
|
cp++;
|
||||||
|
*cp = '\0';
|
||||||
|
*pp++ = 0;
|
||||||
|
havesearch = true;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
/* Read nameservers to query. */
|
||||||
|
if (MATCH (buf, "nameserver") && nserv < MAXNS)
|
||||||
|
{
|
||||||
|
struct in_addr a;
|
||||||
|
|
||||||
cp = buf + sizeof("nameserver") - 1;
|
cp = buf + sizeof ("nameserver") - 1;
|
||||||
while (*cp == ' ' || *cp == '\t')
|
while (*cp == ' ' || *cp == '\t')
|
||||||
cp++;
|
cp++;
|
||||||
if ((*cp != '\0') && (*cp != '\n')
|
if ((*cp != '\0') && (*cp != '\n') && __inet_aton (cp, &a))
|
||||||
&& __inet_aton(cp, &a)) {
|
{
|
||||||
statp->nsaddr_list[nserv].sin_addr = a;
|
statp->nsaddr_list[nserv].sin_addr = a;
|
||||||
statp->nsaddr_list[nserv].sin_family = AF_INET;
|
statp->nsaddr_list[nserv].sin_family = AF_INET;
|
||||||
statp->nsaddr_list[nserv].sin_port =
|
statp->nsaddr_list[nserv].sin_port = htons (NAMESERVER_PORT);
|
||||||
htons(NAMESERVER_PORT);
|
nserv++;
|
||||||
nserv++;
|
}
|
||||||
} else {
|
else
|
||||||
struct in6_addr a6;
|
{
|
||||||
char *el;
|
struct in6_addr a6;
|
||||||
|
char *el;
|
||||||
|
|
||||||
if ((el = strpbrk(cp, " \t\n")) != NULL)
|
if ((el = strpbrk (cp, " \t\n")) != NULL)
|
||||||
*el = '\0';
|
*el = '\0';
|
||||||
if ((el = strchr(cp, SCOPE_DELIMITER)) != NULL)
|
if ((el = strchr (cp, SCOPE_DELIMITER)) != NULL)
|
||||||
*el = '\0';
|
*el = '\0';
|
||||||
if ((*cp != '\0') &&
|
if ((*cp != '\0') && (__inet_pton (AF_INET6, cp, &a6) > 0))
|
||||||
(__inet_pton(AF_INET6, cp, &a6) > 0)) {
|
{
|
||||||
struct sockaddr_in6 *sa6;
|
struct sockaddr_in6 *sa6;
|
||||||
|
|
||||||
sa6 = malloc(sizeof(*sa6));
|
sa6 = malloc (sizeof (*sa6));
|
||||||
if (sa6 != NULL) {
|
if (sa6 != NULL)
|
||||||
sa6->sin6_family = AF_INET6;
|
{
|
||||||
sa6->sin6_port = htons(NAMESERVER_PORT);
|
sa6->sin6_family = AF_INET6;
|
||||||
sa6->sin6_flowinfo = 0;
|
sa6->sin6_port = htons (NAMESERVER_PORT);
|
||||||
sa6->sin6_addr = a6;
|
sa6->sin6_flowinfo = 0;
|
||||||
|
sa6->sin6_addr = a6;
|
||||||
|
|
||||||
sa6->sin6_scope_id = 0;
|
sa6->sin6_scope_id = 0;
|
||||||
if (__glibc_likely (el != NULL)) {
|
if (__glibc_likely (el != NULL))
|
||||||
/* Ignore errors, for backwards
|
/* Ignore errors, for backwards
|
||||||
compatibility. */
|
compatibility. */
|
||||||
(void) __inet6_scopeid_pton
|
__inet6_scopeid_pton
|
||||||
(&a6, el + 1, &sa6->sin6_scope_id);
|
(&a6, el + 1, &sa6->sin6_scope_id);
|
||||||
}
|
|
||||||
|
|
||||||
statp->nsaddr_list[nserv].sin_family = 0;
|
statp->nsaddr_list[nserv].sin_family = 0;
|
||||||
statp->_u._ext.nsaddrs[nserv] = sa6;
|
statp->_u._ext.nsaddrs[nserv] = sa6;
|
||||||
statp->_u._ext.nssocks[nserv] = -1;
|
statp->_u._ext.nssocks[nserv] = -1;
|
||||||
have_serv6 = 1;
|
have_serv6 = true;
|
||||||
nserv++;
|
nserv++;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
if (MATCH(buf, "sortlist")) {
|
if (MATCH (buf, "sortlist"))
|
||||||
struct in_addr a;
|
{
|
||||||
|
struct in_addr a;
|
||||||
|
|
||||||
cp = buf + sizeof("sortlist") - 1;
|
cp = buf + sizeof ("sortlist") - 1;
|
||||||
while (nsort < MAXRESOLVSORT) {
|
while (nsort < MAXRESOLVSORT)
|
||||||
while (*cp == ' ' || *cp == '\t')
|
{
|
||||||
cp++;
|
while (*cp == ' ' || *cp == '\t')
|
||||||
if (*cp == '\0' || *cp == '\n' || *cp == ';')
|
cp++;
|
||||||
break;
|
if (*cp == '\0' || *cp == '\n' || *cp == ';')
|
||||||
net = cp;
|
break;
|
||||||
while (*cp && !is_sort_mask (*cp) && *cp != ';' &&
|
net = cp;
|
||||||
isascii(*cp) && !isspace(*cp))
|
while (*cp && !is_sort_mask (*cp) && *cp != ';'
|
||||||
cp++;
|
&& isascii (*cp) && !isspace (*cp))
|
||||||
n = *cp;
|
cp++;
|
||||||
*cp = 0;
|
char separator = *cp;
|
||||||
if (__inet_aton(net, &a)) {
|
*cp = 0;
|
||||||
statp->sort_list[nsort].addr = a;
|
if (__inet_aton (net, &a))
|
||||||
if (is_sort_mask (n)) {
|
{
|
||||||
*cp++ = n;
|
statp->sort_list[nsort].addr = a;
|
||||||
net = cp;
|
if (is_sort_mask (separator))
|
||||||
while (*cp && *cp != ';' &&
|
{
|
||||||
isascii(*cp) && !isspace(*cp))
|
*cp++ = separator;
|
||||||
cp++;
|
net = cp;
|
||||||
n = *cp;
|
while (*cp && *cp != ';'
|
||||||
*cp = 0;
|
&& isascii (*cp) && !isspace (*cp))
|
||||||
if (__inet_aton(net, &a)) {
|
cp++;
|
||||||
statp->sort_list[nsort].mask = a.s_addr;
|
separator = *cp;
|
||||||
} else {
|
*cp = 0;
|
||||||
statp->sort_list[nsort].mask =
|
if (__inet_aton (net, &a))
|
||||||
net_mask(statp->sort_list[nsort].addr);
|
statp->sort_list[nsort].mask = a.s_addr;
|
||||||
}
|
else
|
||||||
} else {
|
statp->sort_list[nsort].mask
|
||||||
statp->sort_list[nsort].mask =
|
= net_mask (statp->sort_list[nsort].addr);
|
||||||
net_mask(statp->sort_list[nsort].addr);
|
}
|
||||||
}
|
else
|
||||||
nsort++;
|
statp->sort_list[nsort].mask
|
||||||
}
|
= net_mask (statp->sort_list[nsort].addr);
|
||||||
*cp = n;
|
nsort++;
|
||||||
}
|
}
|
||||||
continue;
|
*cp = separator;
|
||||||
}
|
}
|
||||||
if (MATCH(buf, "options")) {
|
continue;
|
||||||
res_setoptions(statp, buf + sizeof("options") - 1, "conf");
|
}
|
||||||
continue;
|
if (MATCH (buf, "options"))
|
||||||
}
|
{
|
||||||
}
|
res_setoptions (statp, buf + sizeof ("options") - 1, "conf");
|
||||||
statp->nscount = nserv;
|
continue;
|
||||||
if (have_serv6) {
|
}
|
||||||
/* We try IPv6 servers again. */
|
}
|
||||||
statp->ipv6_unavail = false;
|
statp->nscount = nserv;
|
||||||
}
|
if (have_serv6)
|
||||||
statp->nsort = nsort;
|
/* We try IPv6 servers again. */
|
||||||
(void) fclose(fp);
|
statp->ipv6_unavail = false;
|
||||||
}
|
statp->nsort = nsort;
|
||||||
if (__glibc_unlikely (statp->nscount == 0)) {
|
fclose (fp);
|
||||||
statp->nsaddr.sin_addr = __inet_makeaddr(IN_LOOPBACKNET, 1);
|
}
|
||||||
statp->nsaddr.sin_family = AF_INET;
|
if (__glibc_unlikely (statp->nscount == 0))
|
||||||
statp->nsaddr.sin_port = htons(NAMESERVER_PORT);
|
{
|
||||||
statp->nscount = 1;
|
statp->nsaddr.sin_addr = __inet_makeaddr (IN_LOOPBACKNET, 1);
|
||||||
}
|
statp->nsaddr.sin_family = AF_INET;
|
||||||
if (statp->defdname[0] == 0 &&
|
statp->nsaddr.sin_port = htons (NAMESERVER_PORT);
|
||||||
__gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
|
statp->nscount = 1;
|
||||||
(cp = strchr(buf, '.')) != NULL)
|
}
|
||||||
strcpy(statp->defdname, cp + 1);
|
if (statp->defdname[0] == 0
|
||||||
|
&& __gethostname (buf, sizeof (statp->defdname) - 1) == 0
|
||||||
|
&& (cp = strchr (buf, '.')) != NULL)
|
||||||
|
strcpy (statp->defdname, cp + 1);
|
||||||
|
|
||||||
/* find components of local domain that might be searched */
|
/* Find components of local domain that might be searched. */
|
||||||
if (havesearch == 0) {
|
if (!havesearch)
|
||||||
pp = statp->dnsrch;
|
{
|
||||||
*pp++ = statp->defdname;
|
pp = statp->dnsrch;
|
||||||
*pp = NULL;
|
*pp++ = statp->defdname;
|
||||||
|
*pp = NULL;
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
||||||
if ((cp = getenv("RES_OPTIONS")) != NULL)
|
if ((cp = getenv ("RES_OPTIONS")) != NULL)
|
||||||
res_setoptions(statp, cp, "env");
|
res_setoptions (statp, cp, "env");
|
||||||
statp->options |= RES_INIT;
|
statp->options |= RES_INIT;
|
||||||
return (0);
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static void
|
static void
|
||||||
internal_function
|
res_setoptions (res_state statp, const char *options, const char *source)
|
||||||
res_setoptions(res_state statp, const char *options, const char *source) {
|
{
|
||||||
const char *cp = options;
|
const char *cp = options;
|
||||||
int i;
|
|
||||||
|
|
||||||
while (*cp) {
|
while (*cp)
|
||||||
/* skip leading and inner runs of spaces */
|
{
|
||||||
while (*cp == ' ' || *cp == '\t')
|
/* Skip leading and inner runs of spaces. */
|
||||||
cp++;
|
while (*cp == ' ' || *cp == '\t')
|
||||||
/* search for and process individual options */
|
cp++;
|
||||||
if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
|
/* Search for and process individual options. */
|
||||||
i = atoi(cp + sizeof("ndots:") - 1);
|
if (!strncmp (cp, "ndots:", sizeof ("ndots:") - 1))
|
||||||
if (i <= RES_MAXNDOTS)
|
{
|
||||||
statp->ndots = i;
|
int i = atoi (cp + sizeof ("ndots:") - 1);
|
||||||
else
|
if (i <= RES_MAXNDOTS)
|
||||||
statp->ndots = RES_MAXNDOTS;
|
statp->ndots = i;
|
||||||
} else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) {
|
else
|
||||||
i = atoi(cp + sizeof("timeout:") - 1);
|
statp->ndots = RES_MAXNDOTS;
|
||||||
if (i <= RES_MAXRETRANS)
|
}
|
||||||
statp->retrans = i;
|
else if (!strncmp (cp, "timeout:", sizeof ("timeout:") - 1))
|
||||||
else
|
{
|
||||||
statp->retrans = RES_MAXRETRANS;
|
int i = atoi (cp + sizeof ("timeout:") - 1);
|
||||||
} else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){
|
if (i <= RES_MAXRETRANS)
|
||||||
i = atoi(cp + sizeof("attempts:") - 1);
|
statp->retrans = i;
|
||||||
if (i <= RES_MAXRETRY)
|
else
|
||||||
statp->retry = i;
|
statp->retrans = RES_MAXRETRANS;
|
||||||
else
|
}
|
||||||
statp->retry = RES_MAXRETRY;
|
else if (!strncmp (cp, "attempts:", sizeof ("attempts:") - 1))
|
||||||
} else {
|
{
|
||||||
static const struct
|
int i = atoi (cp + sizeof ("attempts:") - 1);
|
||||||
{
|
if (i <= RES_MAXRETRY)
|
||||||
char str[22];
|
statp->retry = i;
|
||||||
uint8_t len;
|
else
|
||||||
uint8_t clear;
|
statp->retry = RES_MAXRETRY;
|
||||||
unsigned long int flag;
|
}
|
||||||
} options[] = {
|
else
|
||||||
|
{
|
||||||
|
static const struct
|
||||||
|
{
|
||||||
|
char str[22];
|
||||||
|
uint8_t len;
|
||||||
|
uint8_t clear;
|
||||||
|
unsigned long int flag;
|
||||||
|
} options[] = {
|
||||||
#define STRnLEN(str) str, sizeof (str) - 1
|
#define STRnLEN(str) str, sizeof (str) - 1
|
||||||
{ STRnLEN ("inet6"), 0, DEPRECATED_RES_USE_INET6 },
|
{ STRnLEN ("inet6"), 0, DEPRECATED_RES_USE_INET6 },
|
||||||
{ STRnLEN ("rotate"), 0, RES_ROTATE },
|
{ STRnLEN ("rotate"), 0, RES_ROTATE },
|
||||||
{ STRnLEN ("edns0"), 0, RES_USE_EDNS0 },
|
{ STRnLEN ("edns0"), 0, RES_USE_EDNS0 },
|
||||||
{ STRnLEN ("single-request-reopen"), 0, RES_SNGLKUPREOP },
|
{ STRnLEN ("single-request-reopen"), 0, RES_SNGLKUPREOP },
|
||||||
{ STRnLEN ("single-request"), 0, RES_SNGLKUP },
|
{ STRnLEN ("single-request"), 0, RES_SNGLKUP },
|
||||||
{ STRnLEN ("no_tld_query"), 0, RES_NOTLDQUERY },
|
{ STRnLEN ("no_tld_query"), 0, RES_NOTLDQUERY },
|
||||||
{ STRnLEN ("no-tld-query"), 0, RES_NOTLDQUERY },
|
{ STRnLEN ("no-tld-query"), 0, RES_NOTLDQUERY },
|
||||||
{ STRnLEN ("use-vc"), 0, RES_USEVC }
|
{ STRnLEN ("use-vc"), 0, RES_USEVC }
|
||||||
};
|
};
|
||||||
#define noptions (sizeof (options) / sizeof (options[0]))
|
#define noptions (sizeof (options) / sizeof (options[0]))
|
||||||
int i;
|
for (int i = 0; i < noptions; ++i)
|
||||||
for (i = 0; i < noptions; ++i)
|
if (strncmp (cp, options[i].str, options[i].len) == 0)
|
||||||
if (strncmp (cp, options[i].str, options[i].len) == 0)
|
{
|
||||||
{
|
if (options[i].clear)
|
||||||
if (options[i].clear)
|
statp->options &= options[i].flag;
|
||||||
statp->options &= options[i].flag;
|
else
|
||||||
else
|
statp->options |= options[i].flag;
|
||||||
statp->options |= options[i].flag;
|
break;
|
||||||
break;
|
}
|
||||||
}
|
}
|
||||||
if (i == noptions) {
|
/* Skip to next run of spaces. */
|
||||||
/* XXX - print a warning here? */
|
while (*cp && *cp != ' ' && *cp != '\t')
|
||||||
}
|
cp++;
|
||||||
}
|
}
|
||||||
/* skip to next run of spaces */
|
|
||||||
while (*cp && *cp != ' ' && *cp != '\t')
|
|
||||||
cp++;
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/* XXX - should really support CIDR which means explicit masks always. */
|
static uint32_t
|
||||||
/* XXX - should really use system's version of this */
|
|
||||||
static u_int32_t
|
|
||||||
net_mask (struct in_addr in)
|
net_mask (struct in_addr in)
|
||||||
{
|
{
|
||||||
u_int32_t i = ntohl(in.s_addr);
|
uint32_t i = ntohl (in.s_addr);
|
||||||
|
|
||||||
if (IN_CLASSA(i))
|
if (IN_CLASSA (i))
|
||||||
return (htonl(IN_CLASSA_NET));
|
return htonl (IN_CLASSA_NET);
|
||||||
else if (IN_CLASSB(i))
|
else if (IN_CLASSB (i))
|
||||||
return (htonl(IN_CLASSB_NET));
|
return htonl (IN_CLASSB_NET);
|
||||||
return (htonl(IN_CLASSC_NET));
|
return htonl (IN_CLASSC_NET);
|
||||||
}
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user