getnetbynis.c revision 8870 
1/*-
2 * Copyright (c) 1994, Garrett Wollman
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#if defined(LIBC_SCCS) && !defined(lint)
27static char sccsid[] = "@(#)$Id: getnetbynis.c,v 1.2 1994/09/26 02:50:43 wollman Exp $";
28static char rcsid[] = "$Id: getnetbynis.c,v 1.2 1994/09/26 02:50:43 wollman Exp $";
29#endif /* LIBC_SCCS and not lint */
30
31#include <sys/param.h>
32#include <sys/socket.h>
33#include <netinet/in.h>
34#include <arpa/inet.h>
35#include <netdb.h>
36#include <stdio.h>
37#include <ctype.h>
38#include <errno.h>
39#include <string.h>
40
41#define	MAXALIASES	35
42#define	MAXADDRS	35
43
44#ifdef YP
45static char *host_aliases[MAXALIASES];
46#endif /* YP */
47
48static struct netent *
49_getnetbynis(name, map)
50	char *name, *map;
51{
52#ifdef YP
53	register char *cp, **q;
54	static char *result;
55	int resultlen;
56	static struct netent h;
57	static char *domain = (char *)NULL;
58
59	if (domain == (char *)NULL)
60		if (yp_get_default_domain (&domain))
61			return (NULL);
62
63	if (result) {
64		free(result);
65		result = 0;
66	}
67
68	if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
69		return (NULL);
70
71	if ((cp = index(result, '\n')))
72		*cp = '\0';
73
74	cp = strpbrk(result, " \t");
75	*cp++ = '\0';
76	h.n_name = result;
77
78	while (*cp == ' ' || *cp == '\t')
79		cp++;
80
81	h.n_net = inet_network(cp);
82	h.n_addrtype = AF_INET;
83
84	q = h.n_aliases = host_aliases;
85	cp = strpbrk(cp, " \t");
86	if (cp != NULL)
87		*cp++ = '\0';
88	while (cp && *cp) {
89		if (*cp == ' ' || *cp == '\t') {
90			cp++;
91			continue;
92		}
93		if (q < &host_aliases[MAXALIASES - 1])
94			*q++ = cp;
95		cp = strpbrk(cp, " \t");
96		if (cp != NULL)
97			*cp++ = '\0';
98	}
99	*q = NULL;
100	return (&h);
101#else
102	return (NULL);
103#endif
104}
105
106struct netent *
107_getnetbynisname(name)
108	char *name;
109{
110	return _getnetbynis(name, "networks.byname");
111}
112
113struct netent *
114_getnetbynisaddr(addr, type)
115	long addr;
116	int type;
117{
118	struct in_addr in;
119	char *str, *cp;
120	struct netent *np;
121
122	if (type != AF_INET)
123		return (NULL);
124
125	in.s_addr = addr;
126	str = inet_ntoa(in);
127	cp = str + strlen(str) - 2;
128	while(!strcmp(cp, ".0")) {
129		*cp = '\0';
130		cp = str + strlen(str) - 2;
131	}
132
133	return _getnetbynis(str, "networks.byaddr");
134}
135