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3da59cd007
http://www.opengroup.org/onlinepubs/009695399/functions/gethostbyaddr.html gethostbyaddr_r() is changed as well. It breaks ABI backward compatibility on 64 bit arch. So, we fix it on 32 bit arch only for now. Reported by: Rostislav Krasny <rosti.bsd@gmail.com>
349 lines
7.9 KiB
C
349 lines
7.9 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <arpa/nameser.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.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 <resolv.h> /* XXX */
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#ifdef YP
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#include <rpc/rpc.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#include "netdb_private.h"
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#ifdef YP
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static int
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_gethostbynis(const char *name, char *map, int af, struct hostent *he,
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struct hostent_data *hed)
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{
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char *p, *bp, *ep;
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char *cp, **q;
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char *result;
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int resultlen, size, addrok = 0;
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char ypbuf[YPMAXRECORD + 2];
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res_state statp;
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statp = __res_state();
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switch(af) {
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case AF_INET:
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size = NS_INADDRSZ;
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break;
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case AF_INET6:
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size = NS_IN6ADDRSZ;
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break;
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default:
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errno = EAFNOSUPPORT;
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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return (-1);
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}
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if (hed->yp_domain == (char *)NULL)
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if (yp_get_default_domain (&hed->yp_domain)) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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return (-1);
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}
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if (yp_match(hed->yp_domain, map, name, strlen(name), &result,
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&resultlen)) {
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RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
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return (-1);
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}
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/* avoid potential memory leak */
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bcopy((char *)result, (char *)&ypbuf, resultlen);
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ypbuf[resultlen] = '\0';
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free(result);
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result = (char *)&ypbuf;
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if ((cp = index(result, '\n')))
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*cp = '\0';
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cp = strpbrk(result, " \t");
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*cp++ = '\0';
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he->h_addr_list = hed->h_addr_ptrs;
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he->h_addr = (char *)hed->host_addr;
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switch (af) {
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case AF_INET:
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addrok = inet_aton(result, (struct in_addr *)hed->host_addr);
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if (addrok != 1)
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break;
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if (statp->options & RES_USE_INET6) {
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_map_v4v6_address((char *)hed->host_addr,
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(char *)hed->host_addr);
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af = AF_INET6;
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size = NS_IN6ADDRSZ;
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}
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break;
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case AF_INET6:
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addrok = inet_pton(af, result, hed->host_addr);
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break;
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}
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if (addrok != 1) {
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RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
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return (-1);
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}
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he->h_addr_list[1] = NULL;
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he->h_length = size;
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he->h_addrtype = af;
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while (*cp == ' ' || *cp == '\t')
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cp++;
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bp = hed->hostbuf;
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ep = hed->hostbuf + sizeof hed->hostbuf;
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he->h_name = bp;
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q = he->h_aliases = hed->host_aliases;
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p = strpbrk(cp, " \t");
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if (p != NULL)
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*p++ = '\0';
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size = strlen(cp) + 1;
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if (ep - bp < size) {
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RES_SET_H_ERRNO(statp, NO_RECOVERY);
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return (-1);
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}
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strlcpy(bp, cp, ep - bp);
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bp += size;
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cp = p;
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while (cp && *cp) {
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if (*cp == ' ' || *cp == '\t') {
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cp++;
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continue;
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}
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if (q >= &hed->host_aliases[_MAXALIASES - 1])
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break;
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p = strpbrk(cp, " \t");
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if (p != NULL)
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*p++ = '\0';
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size = strlen(cp) + 1;
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if (ep - bp < size)
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break;
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strlcpy(bp, cp, ep - bp);
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*q++ = bp;
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bp += size;
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cp = p;
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}
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*q = NULL;
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return (0);
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}
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static int
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_gethostbynisname_r(const char *name, int af, struct hostent *he,
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struct hostent_data *hed)
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{
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char *map;
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switch (af) {
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case AF_INET:
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map = "hosts.byname";
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break;
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default:
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map = "ipnodes.byname";
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break;
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}
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return (_gethostbynis(name, map, af, he, hed));
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}
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static int
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_gethostbynisaddr_r(const void *addr, socklen_t len, int af,
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struct hostent *he, struct hostent_data *hed)
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{
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char *map;
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char numaddr[46];
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switch (af) {
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case AF_INET:
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map = "hosts.byaddr";
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break;
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default:
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map = "ipnodes.byaddr";
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break;
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}
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if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
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return (-1);
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return (_gethostbynis(numaddr, map, af, he, hed));
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}
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#endif /* YP */
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/* XXX _gethostbynisname/_gethostbynisaddr only used by getipnodeby*() */
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struct hostent *
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_gethostbynisname(const char *name, int af)
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{
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#ifdef YP
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struct hostent *he;
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struct hostent_data *hed;
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u_long oresopt;
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int error;
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res_state statp;
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statp = __res_state();
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if ((he = __hostent_init()) == NULL ||
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(hed = __hostent_data_init()) == NULL) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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return (NULL);
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}
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oresopt = statp->options;
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statp->options &= ~RES_USE_INET6;
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error = _gethostbynisname_r(name, af, he, hed);
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statp->options = oresopt;
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return (error == 0) ? he : NULL;
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#else
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return (NULL);
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#endif
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}
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struct hostent *
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_gethostbynisaddr(const void *addr, socklen_t len, int af)
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{
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#ifdef YP
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struct hostent *he;
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struct hostent_data *hed;
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u_long oresopt;
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int error;
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res_state statp;
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statp = __res_state();
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if ((he = __hostent_init()) == NULL ||
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(hed = __hostent_data_init()) == NULL) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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return (NULL);
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}
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oresopt = statp->options;
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statp->options &= ~RES_USE_INET6;
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error = _gethostbynisaddr_r(addr, len, af, he, hed);
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statp->options = oresopt;
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return (error == 0) ? he : NULL;
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#else
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return (NULL);
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#endif
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}
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int
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_nis_gethostbyname(void *rval, void *cb_data, va_list ap)
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{
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#ifdef YP
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const char *name;
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int af;
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char *buffer;
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size_t buflen;
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int *errnop, *h_errnop;
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struct hostent *hptr, he;
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struct hostent_data *hed;
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res_state statp;
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name = va_arg(ap, const char *);
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af = va_arg(ap, int);
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hptr = va_arg(ap, struct hostent *);
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buffer = va_arg(ap, char *);
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buflen = va_arg(ap, size_t);
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errnop = va_arg(ap, int *);
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h_errnop = va_arg(ap, int *);
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*((struct hostent **)rval) = NULL;
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statp = __res_state();
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if ((hed = __hostent_data_init()) == NULL) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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if (_gethostbynisname_r(name, af, &he, hed) != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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*((struct hostent **)rval) = hptr;
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return (NS_SUCCESS);
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#else
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*((struct hostent **)rval) = NULL;
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return (NS_UNAVAIL);
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#endif
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}
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int
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_nis_gethostbyaddr(void *rval, void *cb_data, va_list ap)
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{
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#ifdef YP
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const void *addr;
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socklen_t len;
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int af;
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char *buffer;
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size_t buflen;
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int *errnop, *h_errnop;
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struct hostent *hptr, he;
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struct hostent_data *hed;
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res_state statp;
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addr = va_arg(ap, const void *);
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len = va_arg(ap, socklen_t);
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af = va_arg(ap, int);
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hptr = va_arg(ap, struct hostent *);
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buffer = va_arg(ap, char *);
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buflen = va_arg(ap, size_t);
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errnop = va_arg(ap, int *);
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h_errnop = va_arg(ap, int *);
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*((struct hostent **)rval) = NULL;
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statp = __res_state();
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if ((hed = __hostent_data_init()) == NULL) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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if (_gethostbynisaddr_r(addr, len, af, &he, hed) != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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*((struct hostent **)rval) = hptr;
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return (NS_SUCCESS);
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#else
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*((struct hostent **)rval) = NULL;
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return (NS_UNAVAIL);
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#endif
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}
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