f0171d33b4
According to style(9): > normally, include <sys/types.h> OR <sys/param.h>, but not both. (<sys/param.h> already includes <sys/types.h> when LOCORE is not defined).
336 lines
8.4 KiB
C
336 lines
8.4 KiB
C
/*
|
|
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
|
|
* Copyright (c) 1995-1999 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 ISC DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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 const char rcsid[] = "$Id: res_data.c,v 1.7 2008/12/11 09:59:00 marka Exp $";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "port_before.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 <ctype.h>
|
|
#include <netdb.h>
|
|
#include <resolv.h>
|
|
#include <res_update.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "port_after.h"
|
|
|
|
const char *_res_opcodes[] = {
|
|
"QUERY",
|
|
"IQUERY",
|
|
"CQUERYM",
|
|
"CQUERYU", /*%< experimental */
|
|
"NOTIFY", /*%< experimental */
|
|
"UPDATE",
|
|
"6",
|
|
"7",
|
|
"8",
|
|
"9",
|
|
"10",
|
|
"11",
|
|
"12",
|
|
"13",
|
|
"ZONEINIT",
|
|
"ZONEREF",
|
|
};
|
|
|
|
#ifdef BIND_UPDATE
|
|
const char *_res_sectioncodes[] = {
|
|
"ZONE",
|
|
"PREREQUISITES",
|
|
"UPDATE",
|
|
"ADDITIONAL",
|
|
};
|
|
#endif
|
|
|
|
#ifndef __BIND_NOSTATIC
|
|
|
|
/* Proto. */
|
|
|
|
int res_ourserver_p(const res_state, const struct sockaddr_in *);
|
|
|
|
__noinline int
|
|
res_init(void) {
|
|
extern int __res_vinit(res_state, int);
|
|
res_state statp = &_res;
|
|
|
|
/*
|
|
* 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 (!statp->retrans)
|
|
statp->retrans = RES_TIMEOUT;
|
|
if (!statp->retry)
|
|
statp->retry = RES_DFLRETRY;
|
|
if (!(statp->options & RES_INIT))
|
|
statp->options = RES_DEFAULT;
|
|
|
|
return (__res_vinit(statp, 1));
|
|
}
|
|
|
|
void
|
|
p_query(const u_char *msg) {
|
|
fp_query(msg, stdout);
|
|
}
|
|
|
|
void
|
|
fp_query(const u_char *msg, FILE *file) {
|
|
fp_nquery(msg, PACKETSZ, file);
|
|
}
|
|
|
|
void
|
|
fp_nquery(const u_char *msg, int len, FILE *file) {
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1)
|
|
return;
|
|
|
|
res_pquery(statp, msg, len, file);
|
|
}
|
|
|
|
int
|
|
res_mkquery(int op, /*!< opcode of query */
|
|
const char *dname, /*!< domain name */
|
|
int class, int type, /*!< class and type of query */
|
|
const u_char *data, /*!< resource record data */
|
|
int datalen, /*!< length of data */
|
|
const u_char *newrr_in, /*!< new rr for modify or append */
|
|
u_char *buf, /*!< buffer to put query */
|
|
int buflen) /*!< size of buffer */
|
|
{
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
return (-1);
|
|
}
|
|
return (res_nmkquery(statp, op, dname, class, type,
|
|
data, datalen,
|
|
newrr_in, buf, buflen));
|
|
}
|
|
|
|
int
|
|
res_mkupdate(ns_updrec *rrecp_in, u_char *buf, int buflen) {
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
return (-1);
|
|
}
|
|
|
|
return (res_nmkupdate(statp, rrecp_in, buf, buflen));
|
|
}
|
|
|
|
int
|
|
res_query(const char *name, /*!< domain name */
|
|
int class, int type, /*!< class and type of query */
|
|
u_char *answer, /*!< buffer to put answer */
|
|
int anslen) /*!< size of answer buffer */
|
|
{
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
return (-1);
|
|
}
|
|
return (res_nquery(statp, name, class, type, answer, anslen));
|
|
}
|
|
|
|
#ifndef _LIBC
|
|
void
|
|
res_send_setqhook(res_send_qhook hook) {
|
|
_res.qhook = hook;
|
|
}
|
|
|
|
void
|
|
res_send_setrhook(res_send_rhook hook) {
|
|
_res.rhook = hook;
|
|
}
|
|
#endif
|
|
|
|
int
|
|
res_isourserver(const struct sockaddr_in *inp) {
|
|
return (res_ourserver_p(&_res, inp));
|
|
}
|
|
|
|
int
|
|
res_send(const u_char *buf, int buflen, u_char *ans, int anssiz) {
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
/* errno should have been set by res_init() in this case. */
|
|
return (-1);
|
|
}
|
|
|
|
return (res_nsend(statp, buf, buflen, ans, anssiz));
|
|
}
|
|
|
|
#ifndef _LIBC
|
|
int
|
|
res_sendsigned(const u_char *buf, int buflen, ns_tsig_key *key,
|
|
u_char *ans, int anssiz)
|
|
{
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
/* errno should have been set by res_init() in this case. */
|
|
return (-1);
|
|
}
|
|
|
|
return (res_nsendsigned(statp, buf, buflen, key, ans, anssiz));
|
|
}
|
|
#endif
|
|
|
|
void
|
|
res_close(void) {
|
|
res_nclose(&_res);
|
|
}
|
|
|
|
int
|
|
res_update(ns_updrec *rrecp_in) {
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
return (-1);
|
|
}
|
|
|
|
return (res_nupdate(statp, rrecp_in, NULL));
|
|
}
|
|
|
|
int
|
|
res_search(const char *name, /*!< domain name */
|
|
int class, int type, /*!< class and type of query */
|
|
u_char *answer, /*!< buffer to put answer */
|
|
int anslen) /*!< size of answer */
|
|
{
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
return (-1);
|
|
}
|
|
|
|
return (res_nsearch(statp, name, class, type, answer, anslen));
|
|
}
|
|
|
|
int
|
|
res_querydomain(const char *name,
|
|
const char *domain,
|
|
int class, int type, /*!< class and type of query */
|
|
u_char *answer, /*!< buffer to put answer */
|
|
int anslen) /*!< size of answer */
|
|
{
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
return (-1);
|
|
}
|
|
|
|
return (res_nquerydomain(statp, name, domain,
|
|
class, type,
|
|
answer, anslen));
|
|
}
|
|
|
|
u_int
|
|
res_randomid(void) {
|
|
res_state statp = &_res;
|
|
if ((statp->options & RES_INIT) == 0U && res_init() == -1) {
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
return (-1);
|
|
}
|
|
|
|
return (res_nrandomid(statp));
|
|
}
|
|
|
|
int
|
|
res_opt(int n0, u_char *buf, int buflen, int anslen)
|
|
{
|
|
return (res_nopt(&_res, n0, buf, buflen, anslen));
|
|
}
|
|
|
|
const char *
|
|
hostalias(const char *name) {
|
|
static char abuf[MAXDNAME];
|
|
|
|
return (res_hostalias(&_res, name, abuf, sizeof abuf));
|
|
}
|
|
|
|
#ifdef ultrix
|
|
int
|
|
local_hostname_length(const char *hostname) {
|
|
int len_host, len_domain;
|
|
res_state statp;
|
|
|
|
statp = &_res;
|
|
if (!*statp->defdname)
|
|
res_init();
|
|
len_host = strlen(hostname);
|
|
len_domain = strlen(statp->defdname);
|
|
if (len_host > len_domain &&
|
|
!strcasecmp(hostname + len_host - len_domain, statp->defdname) &&
|
|
hostname[len_host - len_domain - 1] == '.')
|
|
return (len_host - len_domain - 1);
|
|
return (0);
|
|
}
|
|
#endif /*ultrix*/
|
|
|
|
/*
|
|
* Weak aliases for applications that use certain private entry points,
|
|
* and fail to include <resolv.h>.
|
|
*/
|
|
#undef res_init
|
|
__weak_reference(__res_init, res_init);
|
|
#undef p_query
|
|
__weak_reference(__p_query, p_query);
|
|
#undef res_mkquery
|
|
__weak_reference(__res_mkquery, res_mkquery);
|
|
#undef res_query
|
|
__weak_reference(__res_query, res_query);
|
|
#undef res_send
|
|
__weak_reference(__res_send, res_send);
|
|
#undef res_close
|
|
__weak_reference(__res_close, _res_close);
|
|
#undef res_search
|
|
__weak_reference(__res_search, res_search);
|
|
#undef res_querydomain
|
|
__weak_reference(__res_querydomain, res_querydomain);
|
|
|
|
#endif
|
|
|
|
/*! \file */
|