/*
|
/*
|
* Copyright (c) 1995-1999 by Internet Software Consortium.
|
* Copyright (c) 1995-1999 by Internet Software Consortium.
|
*
|
*
|
* Permission to use, copy, modify, and distribute this software for any
|
* Permission to use, copy, modify, and distribute this software for any
|
* purpose with or without fee is hereby granted, provided that the above
|
* purpose with or without fee is hereby granted, provided that the above
|
* copyright notice and this permission notice appear in all copies.
|
* copyright notice and this permission notice appear in all copies.
|
*
|
*
|
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
|
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
|
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
|
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
|
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
|
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
|
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
|
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
|
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
|
* 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
|
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
|
* SOFTWARE.
|
* SOFTWARE.
|
*/
|
*/
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
#if defined(LIBC_SCCS) && !defined(lint)
|
static const char rcsid[] = "$BINDId: res_data.c,v 8.17 1999/10/13 17:11:31 vixie Exp $";
|
static const char rcsid[] = "$BINDId: res_data.c,v 8.17 1999/10/13 17:11:31 vixie Exp $";
|
#endif /* LIBC_SCCS and not lint */
|
#endif /* LIBC_SCCS and not lint */
|
|
|
#include <sys/types.h>
|
#include <sys/types.h>
|
#include <sys/param.h>
|
#include <sys/param.h>
|
#include <sys/socket.h>
|
#include <sys/socket.h>
|
#include <sys/time.h>
|
#include <sys/time.h>
|
|
|
#include <netinet/in.h>
|
#include <netinet/in.h>
|
#include <arpa/inet.h>
|
#include <arpa/inet.h>
|
#include <arpa/nameser.h>
|
#include <arpa/nameser.h>
|
|
|
#include <ctype.h>
|
#include <ctype.h>
|
#include <netdb.h>
|
#include <netdb.h>
|
#include <resolv.h>
|
#include <resolv.h>
|
#ifdef BIND_UPDATE
|
#ifdef BIND_UPDATE
|
#include <res_update.h>
|
#include <res_update.h>
|
#endif
|
#endif
|
#include <stdio.h>
|
#include <stdio.h>
|
#include <stdlib.h>
|
#include <stdlib.h>
|
#include <string.h>
|
#include <string.h>
|
#include <unistd.h>
|
#include <unistd.h>
|
#include "libc-symbols.h"
|
#include "libc-symbols.h"
|
|
|
const char *_res_opcodes[] = {
|
const char *_res_opcodes[] = {
|
"QUERY",
|
"QUERY",
|
"IQUERY",
|
"IQUERY",
|
"CQUERYM",
|
"CQUERYM",
|
"CQUERYU", /* experimental */
|
"CQUERYU", /* experimental */
|
"NOTIFY", /* experimental */
|
"NOTIFY", /* experimental */
|
"UPDATE",
|
"UPDATE",
|
"6",
|
"6",
|
"7",
|
"7",
|
"8",
|
"8",
|
"9",
|
"9",
|
"10",
|
"10",
|
"11",
|
"11",
|
"12",
|
"12",
|
"13",
|
"13",
|
"ZONEINIT",
|
"ZONEINIT",
|
"ZONEREF",
|
"ZONEREF",
|
};
|
};
|
libresolv_hidden_data_def (_res_opcodes)
|
libresolv_hidden_data_def (_res_opcodes)
|
|
|
#ifdef BIND_UPDATE
|
#ifdef BIND_UPDATE
|
const char *_res_sectioncodes[] attribute_hidden = {
|
const char *_res_sectioncodes[] attribute_hidden = {
|
"ZONE",
|
"ZONE",
|
"PREREQUISITES",
|
"PREREQUISITES",
|
"UPDATE",
|
"UPDATE",
|
"ADDITIONAL",
|
"ADDITIONAL",
|
};
|
};
|
#endif
|
#endif
|
|
|
#ifndef __BIND_NOSTATIC
|
#ifndef __BIND_NOSTATIC
|
#ifdef _LIBC
|
#ifdef _LIBC
|
/* The definition has been moved to res_libc.c. */
|
/* The definition has been moved to res_libc.c. */
|
#else
|
#else
|
#undef _res
|
#undef _res
|
struct __res_state _res
|
struct __res_state _res
|
# if defined(__BIND_RES_TEXT)
|
# if defined(__BIND_RES_TEXT)
|
= { RES_TIMEOUT, } /* Motorola, et al. */
|
= { RES_TIMEOUT, } /* Motorola, et al. */
|
# endif
|
# endif
|
;
|
;
|
#endif
|
#endif
|
|
|
/* Proto. */
|
/* Proto. */
|
#ifndef _LIBC
|
#ifndef _LIBC
|
int res_ourserver_p(const res_state, const struct sockaddr_in *);
|
int res_ourserver_p(const res_state, const struct sockaddr_in *);
|
void res_pquery(const res_state, const u_char *, int, FILE *);
|
void res_pquery(const res_state, const u_char *, int, FILE *);
|
#endif
|
#endif
|
|
|
#ifndef _LIBC
|
#ifndef _LIBC
|
/* Moved to res_libc.c since res_init() should go into libc.so but the
|
/* Moved to res_libc.c since res_init() should go into libc.so but the
|
rest of this file not. */
|
rest of this file not. */
|
int
|
int
|
res_init(void) {
|
res_init(void) {
|
extern int __res_vinit(res_state, int);
|
extern int __res_vinit(res_state, int);
|
|
|
/*
|
/*
|
* These three fields used to be statically initialized. This made
|
* These three fields used to be statically initialized. This made
|
* it hard to use this code in a shared library. It is necessary,
|
* it hard to use this code in a shared library. It is necessary,
|
* now that we're doing dynamic initialization here, that we preserve
|
* now that we're doing dynamic initialization here, that we preserve
|
* the old semantics: if an application modifies one of these three
|
* the old semantics: if an application modifies one of these three
|
* fields of _res before res_init() is called, res_init() will not
|
* fields of _res before res_init() is called, res_init() will not
|
* alter them. Of course, if an application is setting them to
|
* alter them. Of course, if an application is setting them to
|
* _zero_ before calling res_init(), hoping to override what used
|
* _zero_ before calling res_init(), hoping to override what used
|
* to be the static default, we can't detect it and unexpected results
|
* 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,
|
* will follow. Zero for any of these fields would make no sense,
|
* so one can safely assume that the applications were already getting
|
* so one can safely assume that the applications were already getting
|
* unexpected results.
|
* unexpected results.
|
*
|
*
|
* _res.options is tricky since some apps were known to diddle the bits
|
* _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
|
* before res_init() was first called. We can't replicate that semantic
|
* with dynamic initialization (they may have turned bits off that are
|
* with dynamic initialization (they may have turned bits off that are
|
* set in RES_DEFAULT). Our solution is to declare such applications
|
* set in RES_DEFAULT). Our solution is to declare such applications
|
* "broken". They could fool us by setting RES_INIT but none do (yet).
|
* "broken". They could fool us by setting RES_INIT but none do (yet).
|
*/
|
*/
|
if (!_res.retrans)
|
if (!_res.retrans)
|
_res.retrans = RES_TIMEOUT;
|
_res.retrans = RES_TIMEOUT;
|
if (!_res.retry)
|
if (!_res.retry)
|
_res.retry = 4;
|
_res.retry = 4;
|
if (!(_res.options & RES_INIT))
|
if (!(_res.options & RES_INIT))
|
_res.options = RES_DEFAULT;
|
_res.options = RES_DEFAULT;
|
|
|
/*
|
/*
|
* This one used to initialize implicitly to zero, so unless the app
|
* This one used to initialize implicitly to zero, so unless the app
|
* has set it to something in particular, we can randomize it now.
|
* has set it to something in particular, we can randomize it now.
|
*/
|
*/
|
if (!_res.id)
|
if (!_res.id)
|
_res.id = res_randomid();
|
_res.id = res_randomid();
|
|
|
return (__res_vinit(&_res, 1));
|
return (__res_vinit(&_res, 1));
|
}
|
}
|
#endif
|
#endif
|
|
|
void
|
void
|
p_query(const u_char *msg) {
|
p_query(const u_char *msg) {
|
fp_query(msg, stdout);
|
fp_query(msg, stdout);
|
}
|
}
|
|
|
void
|
void
|
fp_query(const u_char *msg, FILE *file) {
|
fp_query(const u_char *msg, FILE *file) {
|
fp_nquery(msg, PACKETSZ, file);
|
fp_nquery(msg, PACKETSZ, file);
|
}
|
}
|
libresolv_hidden_def (fp_query)
|
libresolv_hidden_def (fp_query)
|
|
|
void
|
void
|
fp_nquery(const u_char *msg, int len, FILE *file) {
|
fp_nquery(const u_char *msg, int len, FILE *file) {
|
if (__res_maybe_init (&_res, 0) == -1)
|
if (__res_maybe_init (&_res, 0) == -1)
|
return;
|
return;
|
|
|
res_pquery(&_res, msg, len, file);
|
res_pquery(&_res, msg, len, file);
|
}
|
}
|
libresolv_hidden_def (fp_nquery)
|
libresolv_hidden_def (fp_nquery)
|
|
|
int
|
int
|
res_mkquery(int op, /* opcode of query */
|
res_mkquery(int op, /* opcode of query */
|
const char *dname, /* domain name */
|
const char *dname, /* domain name */
|
int class, int type, /* class and type of query */
|
int class, int type, /* class and type of query */
|
const u_char *data, /* resource record data */
|
const u_char *data, /* resource record data */
|
int datalen, /* length of data */
|
int datalen, /* length of data */
|
const u_char *newrr_in, /* new rr for modify or append */
|
const u_char *newrr_in, /* new rr for modify or append */
|
u_char *buf, /* buffer to put query */
|
u_char *buf, /* buffer to put query */
|
int buflen) /* size of buffer */
|
int buflen) /* size of buffer */
|
{
|
{
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
return (-1);
|
return (-1);
|
}
|
}
|
return (res_nmkquery(&_res, op, dname, class, type,
|
return (res_nmkquery(&_res, op, dname, class, type,
|
data, datalen,
|
data, datalen,
|
newrr_in, buf, buflen));
|
newrr_in, buf, buflen));
|
}
|
}
|
|
|
#ifdef BIND_UPDATE
|
#ifdef BIND_UPDATE
|
int
|
int
|
res_mkupdate(ns_updrec *rrecp_in, u_char *buf, int buflen) {
|
res_mkupdate(ns_updrec *rrecp_in, u_char *buf, int buflen) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
return (res_nmkupdate(&_res, rrecp_in, buf, buflen));
|
return (res_nmkupdate(&_res, rrecp_in, buf, buflen));
|
}
|
}
|
#endif
|
#endif
|
|
|
int
|
int
|
res_query(const char *name, /* domain name */
|
res_query(const char *name, /* domain name */
|
int class, int type, /* class and type of query */
|
int class, int type, /* class and type of query */
|
u_char *answer, /* buffer to put answer */
|
u_char *answer, /* buffer to put answer */
|
int anslen) /* size of answer buffer */
|
int anslen) /* size of answer buffer */
|
{
|
{
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
return (-1);
|
return (-1);
|
}
|
}
|
return (res_nquery(&_res, name, class, type, answer, anslen));
|
return (res_nquery(&_res, name, class, type, answer, anslen));
|
}
|
}
|
|
|
void
|
void
|
res_send_setqhook(res_send_qhook hook) {
|
res_send_setqhook(res_send_qhook hook) {
|
_res.qhook = hook;
|
_res.qhook = hook;
|
}
|
}
|
|
|
void
|
void
|
res_send_setrhook(res_send_rhook hook) {
|
res_send_setrhook(res_send_rhook hook) {
|
_res.rhook = hook;
|
_res.rhook = hook;
|
}
|
}
|
|
|
int
|
int
|
res_isourserver(const struct sockaddr_in *inp) {
|
res_isourserver(const struct sockaddr_in *inp) {
|
return (res_ourserver_p(&_res, (const struct sockaddr_in6 *) inp));
|
return (res_ourserver_p(&_res, (const struct sockaddr_in6 *) inp));
|
}
|
}
|
|
|
int
|
int
|
res_send(const u_char *buf, int buflen, u_char *ans, int anssiz) {
|
res_send(const u_char *buf, int buflen, u_char *ans, int anssiz) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
/* errno should have been set by res_init() in this case. */
|
/* errno should have been set by res_init() in this case. */
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
return (res_nsend(&_res, buf, buflen, ans, anssiz));
|
return (res_nsend(&_res, buf, buflen, ans, anssiz));
|
}
|
}
|
|
|
#ifndef _LIBC
|
#ifndef _LIBC
|
int
|
int
|
res_sendsigned(const u_char *buf, int buflen, ns_tsig_key *key,
|
res_sendsigned(const u_char *buf, int buflen, ns_tsig_key *key,
|
u_char *ans, int anssiz)
|
u_char *ans, int anssiz)
|
{
|
{
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
/* errno should have been set by res_init() in this case. */
|
/* errno should have been set by res_init() in this case. */
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
return (res_nsendsigned(&_res, buf, buflen, key, ans, anssiz));
|
return (res_nsendsigned(&_res, buf, buflen, key, ans, anssiz));
|
}
|
}
|
#endif
|
#endif
|
|
|
void
|
void
|
res_close(void) {
|
res_close(void) {
|
#ifdef _LIBC
|
#ifdef _LIBC
|
/*
|
/*
|
* Some stupid programs out there call res_close() before res_init().
|
* Some stupid programs out there call res_close() before res_init().
|
* Since _res._vcsock isn't explicitly initialized, these means that
|
* Since _res._vcsock isn't explicitly initialized, these means that
|
* we could do a close(0), which might lead to some security problems.
|
* we could do a close(0), which might lead to some security problems.
|
* Therefore we check if res_init() was called before by looking at
|
* Therefore we check if res_init() was called before by looking at
|
* the RES_INIT bit in _res.options. If it hasn't been set we bail out
|
* the RES_INIT bit in _res.options. If it hasn't been set we bail out
|
* early. */
|
* early. */
|
if ((_res.options & RES_INIT) == 0)
|
if ((_res.options & RES_INIT) == 0)
|
return;
|
return;
|
#endif
|
#endif
|
res_nclose(&_res);
|
res_nclose(&_res);
|
}
|
}
|
|
|
#ifdef BIND_UPDATE
|
#ifdef BIND_UPDATE
|
int
|
int
|
res_update(ns_updrec *rrecp_in) {
|
res_update(ns_updrec *rrecp_in) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
return (res_nupdate(&_res, rrecp_in, NULL));
|
return (res_nupdate(&_res, rrecp_in, NULL));
|
}
|
}
|
#endif
|
#endif
|
|
|
int
|
int
|
res_search(const char *name, /* domain name */
|
res_search(const char *name, /* domain name */
|
int class, int type, /* class and type of query */
|
int class, int type, /* class and type of query */
|
u_char *answer, /* buffer to put answer */
|
u_char *answer, /* buffer to put answer */
|
int anslen) /* size of answer */
|
int anslen) /* size of answer */
|
{
|
{
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
return (res_nsearch(&_res, name, class, type, answer, anslen));
|
return (res_nsearch(&_res, name, class, type, answer, anslen));
|
}
|
}
|
|
|
int
|
int
|
res_querydomain(const char *name,
|
res_querydomain(const char *name,
|
const char *domain,
|
const char *domain,
|
int class, int type, /* class and type of query */
|
int class, int type, /* class and type of query */
|
u_char *answer, /* buffer to put answer */
|
u_char *answer, /* buffer to put answer */
|
int anslen) /* size of answer */
|
int anslen) /* size of answer */
|
{
|
{
|
if (__res_maybe_init (&_res, 1) == -1) {
|
if (__res_maybe_init (&_res, 1) == -1) {
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
RES_SET_H_ERRNO(&_res, NETDB_INTERNAL);
|
return (-1);
|
return (-1);
|
}
|
}
|
|
|
return (res_nquerydomain(&_res, name, domain,
|
return (res_nquerydomain(&_res, name, domain,
|
class, type,
|
class, type,
|
answer, anslen));
|
answer, anslen));
|
}
|
}
|
|
|
const char *
|
const char *
|
hostalias(const char *name) {
|
hostalias(const char *name) {
|
static char abuf[MAXDNAME];
|
static char abuf[MAXDNAME];
|
|
|
return (res_hostalias(&_res, name, abuf, sizeof abuf));
|
return (res_hostalias(&_res, name, abuf, sizeof abuf));
|
}
|
}
|
libresolv_hidden_def (hostalias)
|
libresolv_hidden_def (hostalias)
|
|
|
#ifdef ultrix
|
#ifdef ultrix
|
int
|
int
|
local_hostname_length(const char *hostname) {
|
local_hostname_length(const char *hostname) {
|
int len_host, len_domain;
|
int len_host, len_domain;
|
|
|
if (!*_res.defdname)
|
if (!*_res.defdname)
|
res_init();
|
res_init();
|
len_host = strlen(hostname);
|
len_host = strlen(hostname);
|
len_domain = strlen(_res.defdname);
|
len_domain = strlen(_res.defdname);
|
if (len_host > len_domain &&
|
if (len_host > len_domain &&
|
!strcasecmp(hostname + len_host - len_domain, _res.defdname) &&
|
!strcasecmp(hostname + len_host - len_domain, _res.defdname) &&
|
hostname[len_host - len_domain - 1] == '.')
|
hostname[len_host - len_domain - 1] == '.')
|
return (len_host - len_domain - 1);
|
return (len_host - len_domain - 1);
|
return (0);
|
return (0);
|
}
|
}
|
#endif /*ultrix*/
|
#endif /*ultrix*/
|
|
|
#endif
|
#endif
|
|
|
|
|
#include <shlib-compat.h>
|
#include <shlib-compat.h>
|
|
|
#if SHLIB_COMPAT(libresolv, GLIBC_2_0, GLIBC_2_2)
|
#if SHLIB_COMPAT(libresolv, GLIBC_2_0, GLIBC_2_2)
|
# undef res_mkquery
|
# undef res_mkquery
|
# undef res_query
|
# undef res_query
|
# undef res_querydomain
|
# undef res_querydomain
|
# undef res_search
|
# undef res_search
|
weak_alias (__res_mkquery, res_mkquery);
|
weak_alias (__res_mkquery, res_mkquery);
|
weak_alias (__res_query, res_query);
|
weak_alias (__res_query, res_query);
|
weak_alias (__res_querydomain, res_querydomain);
|
weak_alias (__res_querydomain, res_querydomain);
|
weak_alias (__res_search, res_search);
|
weak_alias (__res_search, res_search);
|
#endif
|
#endif
|
|
|
