155 lines
4.1 KiB
C
155 lines
4.1 KiB
C
/*-
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* Copyright (c) 1994, Garrett Wollman
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)$FreeBSD$";
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static char rcsid[] = "$FreeBSD$";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#include <stdarg.h>
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#include <nsswitch.h>
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#include <arpa/nameser.h> /* XXX hack for _res */
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#include <resolv.h> /* XXX hack for _res */
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extern int _ht_gethostbyname(void *, void *, va_list);
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extern int _dns_gethostbyname(void *, void *, va_list);
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extern int _nis_gethostbyname(void *, void *, va_list);
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extern int _ht_gethostbyaddr(void *, void *, va_list);
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extern int _dns_gethostbyaddr(void *, void *, va_list);
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extern int _nis_gethostbyaddr(void *, void *, va_list);
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/* Host lookup order if nsswitch.conf is broken or nonexistant */
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static const ns_src default_src[] = {
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{ NSSRC_FILES, NS_SUCCESS },
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{ NSSRC_DNS, NS_SUCCESS },
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{ 0 }
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};
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struct hostent *
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gethostbyname(const char *name)
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{
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struct hostent *hp;
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if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
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h_errno = NETDB_INTERNAL;
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return (NULL);
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}
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if (_res.options & RES_USE_INET6) { /* XXX */
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hp = gethostbyname2(name, AF_INET6); /* XXX */
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if (hp) /* XXX */
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return (hp); /* XXX */
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} /* XXX */
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return (gethostbyname2(name, AF_INET));
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}
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struct hostent *
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gethostbyname2(const char *name, int type)
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{
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struct hostent *hp = 0;
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int rval;
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static const ns_dtab dtab[] = {
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NS_FILES_CB(_ht_gethostbyname, NULL)
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{ NSSRC_DNS, _dns_gethostbyname, NULL },
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NS_NIS_CB(_nis_gethostbyname, NULL) /* force -DHESIOD */
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{ 0 }
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};
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rval = nsdispatch((void *)&hp, dtab, NSDB_HOSTS, "gethostbyname",
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default_src, name, type);
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if (rval != NS_SUCCESS)
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return NULL;
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else
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return hp;
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}
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struct hostent *
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gethostbyaddr(const char *addr, int len, int type)
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{
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struct hostent *hp = 0;
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int rval;
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static const ns_dtab dtab[] = {
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NS_FILES_CB(_ht_gethostbyaddr, NULL)
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{ NSSRC_DNS, _dns_gethostbyaddr, NULL },
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NS_NIS_CB(_nis_gethostbyaddr, NULL) /* force -DHESIOD */
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{ 0 }
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};
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rval = nsdispatch((void *)&hp, dtab, NSDB_HOSTS, "gethostbyaddr",
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default_src, addr, len, type);
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if (rval != NS_SUCCESS)
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return NULL;
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else
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return hp;
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}
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#ifdef _THREAD_SAFE
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struct hostent_data;
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/*
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* Temporary function (not thread safe)
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*/
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int gethostbyaddr_r(const char *addr, int len, int type,
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struct hostent *result, struct hostent_data *buffer)
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{
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struct hostent *hp;
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int ret;
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if ((hp = gethostbyaddr(addr, len, type)) == NULL) {
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ret = -1;
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} else {
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memcpy(result, hp, sizeof(struct hostent));
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ret = 0;
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}
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return(ret);
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}
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#endif
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void
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sethostent(stayopen)
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int stayopen;
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{
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_sethosthtent(stayopen);
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_sethostdnsent(stayopen);
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}
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void
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endhostent()
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{
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_endhosthtent();
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_endhostdnsent();
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}
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