ff27d2a474
broken. The translation from network number to ASCII string was not working correctly (you would sometimes get things like 0.244.0.0 instead of 244.0.0). Also copied results of yp_match() to a static buffer for consistency with gethostbynis.c. Note: _getnetbynisaddr() chops off trailing .0's, i.e. 244.0.0 is truncated to 244. By contrast, getnetbyht.c code (for local /etc/networks lookups) leaves the traling .0's in place. This means that the NIS and local file lookups will match different things when looking up the same network number. I'm not sure which is the correct behavior. (I think the DNS lookup code tries all combinations -- should the NIS and local host lookup routines do that too?)
164 lines
4.0 KiB
C
164 lines
4.0 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[] = "@(#)$Id: getnetbynis.c,v 1.4 1995/10/22 14:39:06 phk Exp $";
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static char rcsid[] = "$Id: getnetbynis.c,v 1.4 1995/10/22 14:39:06 phk Exp $";
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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 <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 <arpa/nameser.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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#define MAXALIASES 35
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#define MAXADDRS 35
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#ifdef YP
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static char *host_aliases[MAXALIASES];
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#endif /* YP */
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static struct netent *
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_getnetbynis(name, map)
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char *name, *map;
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{
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#ifdef YP
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register char *cp, **q;
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static char *result;
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int resultlen;
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static struct netent h;
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static char *domain = (char *)NULL;
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static char ypbuf[YPMAXRECORD];
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if (domain == (char *)NULL)
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if (yp_get_default_domain (&domain))
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return (NULL);
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if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
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return (NULL);
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bcopy((char *)result, (char *)&ypbuf, resultlen);
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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.n_name = result;
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while (*cp == ' ' || *cp == '\t')
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cp++;
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h.n_net = inet_network(cp);
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h.n_addrtype = AF_INET;
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q = h.n_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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#else
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return (NULL);
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#endif
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}
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struct netent *
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_getnetbynisname(name)
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char *name;
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{
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return _getnetbynis(name, "networks.byname");
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}
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struct netent *
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_getnetbynisaddr(addr, type)
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long addr;
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int type;
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{
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char *str, *cp;
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unsigned long net2;
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int nn;
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unsigned int netbr[4];
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char buf[MAXDNAME];
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if (type != AF_INET)
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return (NULL);
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for (nn = 4, net2 = addr; net2; net2 >>= 8) {
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netbr[--nn] = net2 & 0xff;
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}
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switch (nn) {
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case 3: /* Class A */
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sprintf(buf, "%u", netbr[3]);
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break;
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case 2: /* Class B */
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sprintf(buf, "%u.%u", netbr[2], netbr[3]);
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break;
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case 1: /* Class C */
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sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]);
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break;
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case 0: /* Class D - E */
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sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1],
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netbr[2], netbr[3]);
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break;
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}
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str = (char *)&buf;
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cp = str + (strlen(str) - 2);
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while(!strcmp(cp, ".0")) {
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*cp = '\0';
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cp = str + (strlen(str) - 2);
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}
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return _getnetbynis(str, "networks.byaddr");
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}
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