| /* |
| * 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 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 const char rcsid[] = "$BINDId: res_data.c,v 8.17 1999/10/13 17:11:31 vixie Exp $"; |
| #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 <ctype.h> |
| #include <netdb.h> |
| #include <resolv.h> |
| #ifdef BIND_UPDATE |
| #include <res_update.h> |
| #endif |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| const char *_res_opcodes[] = { |
| "QUERY", |
| "IQUERY", |
| "CQUERYM", |
| "CQUERYU", /* experimental */ |
| "NOTIFY", /* experimental */ |
| "UPDATE", |
| "6", |
| "7", |
| "8", |
| "9", |
| "10", |
| "11", |
| "12", |
| "13", |
| "ZONEINIT", |
| "ZONEREF", |
| }; |
| libresolv_hidden_data_def (_res_opcodes) |
| |
| #ifdef BIND_UPDATE |
| const char *_res_sectioncodes[] attribute_hidden = { |
| "ZONE", |
| "PREREQUISITES", |
| "UPDATE", |
| "ADDITIONAL", |
| }; |
| #endif |
| |
| #ifndef __BIND_NOSTATIC |
| #ifdef _LIBC |
| /* The definition has been moved to res_libc.c. */ |
| #else |
| #undef _res |
| struct __res_state _res |
| # if defined(__BIND_RES_TEXT) |
| = { RES_TIMEOUT, } /* Motorola, et al. */ |
| # endif |
| ; |
| #endif |
| |
| /* Proto. */ |
| #ifndef _LIBC |
| int res_ourserver_p(const res_state, const struct sockaddr_in *); |
| void res_pquery(const res_state, const u_char *, int, FILE *); |
| #endif |
| |
| #ifndef _LIBC |
| /* Moved to res_libc.c since res_init() should go into libc.so but the |
| rest of this file not. */ |
| int |
| res_init(void) { |
| extern int __res_vinit(res_state, int); |
| |
| /* |
| * 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(); |
| |
| return (__res_vinit(&_res, 1)); |
| } |
| #endif |
| |
| 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); |
| } |
| libresolv_hidden_def (fp_query) |
| |
| void |
| fp_nquery(const u_char *msg, int len, FILE *file) { |
| if (__res_maybe_init (&_res, 0) == -1) |
| return; |
| |
| res_pquery(&_res, msg, len, file); |
| } |
| libresolv_hidden_def (fp_nquery) |
| |
| 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 */ |
| { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| RES_SET_H_ERRNO(&_res, NETDB_INTERNAL); |
| return (-1); |
| } |
| return (res_nmkquery(&_res, op, dname, class, type, |
| data, datalen, |
| newrr_in, buf, buflen)); |
| } |
| |
| #ifdef BIND_UPDATE |
| int |
| res_mkupdate(ns_updrec *rrecp_in, u_char *buf, int buflen) { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| RES_SET_H_ERRNO(&_res, NETDB_INTERNAL); |
| return (-1); |
| } |
| |
| return (res_nmkupdate(&_res, rrecp_in, buf, buflen)); |
| } |
| #endif |
| |
| 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 */ |
| { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| RES_SET_H_ERRNO(&_res, NETDB_INTERNAL); |
| return (-1); |
| } |
| return (res_nquery(&_res, name, class, type, answer, anslen)); |
| } |
| |
| void |
| res_send_setqhook(res_send_qhook hook) { |
| _res.qhook = hook; |
| } |
| |
| void |
| res_send_setrhook(res_send_rhook hook) { |
| _res.rhook = hook; |
| } |
| |
| int |
| res_isourserver(const struct sockaddr_in *inp) { |
| return (res_ourserver_p(&_res, (const struct sockaddr_in6 *) inp)); |
| } |
| |
| int |
| res_send(const u_char *buf, int buflen, u_char *ans, int anssiz) { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| /* errno should have been set by res_init() in this case. */ |
| return (-1); |
| } |
| |
| return (res_nsend(&_res, buf, buflen, ans, anssiz)); |
| } |
| |
| #ifndef _LIBC |
| int |
| res_sendsigned(const u_char *buf, int buflen, ns_tsig_key *key, |
| u_char *ans, int anssiz) |
| { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| /* errno should have been set by res_init() in this case. */ |
| return (-1); |
| } |
| |
| return (res_nsendsigned(&_res, buf, buflen, key, ans, anssiz)); |
| } |
| #endif |
| |
| void |
| res_close(void) { |
| #ifdef _LIBC |
| /* |
| * Some stupid programs out there call res_close() before res_init(). |
| * Since _res._vcsock isn't explicitly initialized, these means that |
| * 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 |
| * the RES_INIT bit in _res.options. If it hasn't been set we bail out |
| * early. */ |
| if ((_res.options & RES_INIT) == 0) |
| return; |
| #endif |
| /* We don't free the name server addresses because we never |
| did it and it would be done implicitly on shutdown. */ |
| __res_iclose(&_res, false); |
| } |
| |
| #ifdef BIND_UPDATE |
| int |
| res_update(ns_updrec *rrecp_in) { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| RES_SET_H_ERRNO(&_res, NETDB_INTERNAL); |
| return (-1); |
| } |
| |
| return (res_nupdate(&_res, rrecp_in, NULL)); |
| } |
| #endif |
| |
| 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 */ |
| { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| RES_SET_H_ERRNO(&_res, NETDB_INTERNAL); |
| return (-1); |
| } |
| |
| return (res_nsearch(&_res, 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 */ |
| { |
| if (__res_maybe_init (&_res, 1) == -1) { |
| RES_SET_H_ERRNO(&_res, NETDB_INTERNAL); |
| return (-1); |
| } |
| |
| return (res_nquerydomain(&_res, name, domain, |
| class, type, |
| answer, anslen)); |
| } |
| |
| const char * |
| hostalias(const char *name) { |
| static char abuf[MAXDNAME]; |
| |
| return (res_hostalias(&_res, name, abuf, sizeof abuf)); |
| } |
| libresolv_hidden_def (hostalias) |
| |
| #ifdef ultrix |
| int |
| local_hostname_length(const char *hostname) { |
| int len_host, len_domain; |
| |
| if (!*_res.defdname) |
| res_init(); |
| len_host = strlen(hostname); |
| len_domain = strlen(_res.defdname); |
| if (len_host > len_domain && |
| !strcasecmp(hostname + len_host - len_domain, _res.defdname) && |
| hostname[len_host - len_domain - 1] == '.') |
| return (len_host - len_domain - 1); |
| return (0); |
| } |
| #endif /*ultrix*/ |
| |
| #endif |
| |
| |
| #include <shlib-compat.h> |
| |
| #if SHLIB_COMPAT(libresolv, GLIBC_2_0, GLIBC_2_2) |
| # undef res_mkquery |
| # undef res_query |
| # undef res_querydomain |
| # undef res_search |
| weak_alias (__res_mkquery, res_mkquery); |
| weak_alias (__res_query, res_query); |
| weak_alias (__res_querydomain, res_querydomain); |
| weak_alias (__res_search, res_search); |
| #endif |