282 lines
6.5 KiB
C
282 lines
6.5 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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#include <sys/types.h>
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#include <sys/types.h>
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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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#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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#ifdef YP
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static char *host_aliases[MAXALIASES];
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static char hostaddr[MAXADDRS];
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static char *host_addrs[2];
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static struct hostent *
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_gethostbynis(name, map, af)
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const char *name;
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char *map;
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int af;
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{
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char *cp, **q;
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char *result;
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int resultlen,size;
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static struct hostent h;
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static char *domain = (char *)NULL;
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static char ypbuf[YPMAXRECORD + 2];
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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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default:
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case AF_INET6:
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size = NS_IN6ADDRSZ;
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errno = EAFNOSUPPORT;
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h_errno = NETDB_INTERNAL;
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return NULL;
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}
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if (domain == (char *)NULL)
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if (yp_get_default_domain (&domain)) {
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h_errno = NETDB_INTERNAL;
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return ((struct hostent *)NULL);
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}
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if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) {
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h_errno = HOST_NOT_FOUND;
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return ((struct hostent *)NULL);
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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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h.h_addr_list = host_addrs;
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h.h_addr = hostaddr;
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*((u_long *)h.h_addr) = inet_addr(result);
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h.h_length = size;
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h.h_addrtype = AF_INET;
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while (*cp == ' ' || *cp == '\t')
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cp++;
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h.h_name = cp;
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q = h.h_aliases = host_aliases;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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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 < &host_aliases[MAXALIASES - 1])
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*q++ = cp;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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}
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*q = NULL;
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return (&h);
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}
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static struct hostent *
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_gethostbynis_r(name, map, af, hp, buffer, buflen, herr)
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const char *name;
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char *map;
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int af;
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struct hostent *hp;
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char *buffer;
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int buflen;
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int *herr;
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{
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char *cp, **q;
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char *result;
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int resultlen,size;
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char *domain = (char *)NULL;
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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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default:
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case AF_INET6:
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size = NS_IN6ADDRSZ;
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errno = EAFNOSUPPORT;
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*herr = NETDB_INTERNAL;
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return NULL;
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}
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if (domain == (char *)NULL)
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if (yp_get_default_domain (&domain)) {
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*herr = NETDB_INTERNAL;
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return ((struct hostent *)NULL);
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}
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if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) {
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*herr = HOST_NOT_FOUND;
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return ((struct hostent *)NULL);
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}
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/* avoid potential memory leak */
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bcopy((char *)result, buffer, resultlen);
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buffer[resultlen] = '\0';
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free(result);
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result = buffer;
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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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*((u_long *)hp->__host_addrs[0]) = inet_addr(result);
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hp->__host_addrs[1] = NULL;
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hp->h_addr_list = hp->__host_addrs;
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hp->h_addr = hp->__host_addrs[0];
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hp->h_length = size;
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hp->h_addrtype = AF_INET;
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while (*cp == ' ' || *cp == '\t')
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cp++;
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hp->h_name = cp;
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q = hp->__host_aliases;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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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 < &hp->__host_aliases[MAXALIASES - 1])
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*q++ = cp;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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}
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hp->h_aliases = hp->__host_aliases;
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*q = NULL;
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return (&hp);
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}
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#endif /* YP */
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/* XXX _gethostbynisname/_gethostbynisaddr only used by getaddrinfo */
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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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return _gethostbynis(name, "hosts.byname", af);
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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 char *addr, int len, int af)
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{
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#ifdef YP
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return _gethostbynis(inet_ntoa(*(struct in_addr *)addr),
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"hosts.byaddr", af);
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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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struct hostent *resultbuf;
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char *buf;
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int buflen;
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int *herr;
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name = va_arg(ap, const char *);
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af = va_arg(ap, int);
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resultbuf = va_arg(ap, struct hostent *);
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buf = va_arg(ap, char *);
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buflen = va_arg(ap, int);
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herr = va_arg(ap, int *);
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*(struct hostent **)rval = _gethostbynis_r(name, "hosts.byname", af, resultbuf, buf, buflen, herr);
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return (*(struct hostent **)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND;
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#else
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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 char *addr;
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int len;
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int af;
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struct hostent *resultbuf;
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char *buf;
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int buflen;
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int *herr;
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addr = va_arg(ap, const char *);
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len = va_arg(ap, int);
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af = va_arg(ap, int);
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resultbuf = va_arg(ap, struct hostent *);
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buf = va_arg(ap, char *);
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buflen = va_arg(ap, int);
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herr = va_arg(ap, int *);
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*(struct hostent **)rval = _gethostbynis_r(inet_ntoa(*(struct in_addr *)addr),"hosts.byaddr", af);
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return (*(struct hostent **)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND;
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#else
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return NS_UNAVAIL;
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#endif
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}
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