getnetbyht.c revision 139612 
1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
35 *	Dep. Matematica Universidade de Coimbra, Portugal, Europe
36 *
37 * Permission to use, copy, modify, and distribute this software for any
38 * purpose with or without fee is hereby granted, provided that the above
39 * copyright notice and this permission notice appear in all copies.
40 *
41 * from getnetent.c	1.1 (Coimbra) 93/06/02
42 */
43
44#if defined(LIBC_SCCS) && !defined(lint)
45static char sccsid[] = "@(#)getnetent.c	8.1 (Berkeley) 6/4/93";
46static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp";
47#endif /* LIBC_SCCS and not lint */
48#include <sys/cdefs.h>
49__FBSDID("$FreeBSD: head/lib/libc/net/getnetbyht.c 139612 2005-01-03 11:07:45Z sobomax $");
50
51#include <sys/types.h>
52#include <sys/socket.h>
53#include <netinet/in.h>
54#include <arpa/inet.h>
55#include <arpa/nameser.h>
56#include <netdb.h>
57#include <stdio.h>
58#include <string.h>
59#include <stdarg.h>
60#include <nsswitch.h>
61
62#define	MAXALIASES	35
63
64static FILE *netf;
65static char line[BUFSIZ+1];
66static struct netent net;
67static char *net_aliases[MAXALIASES];
68static int _net_stayopen;
69
70void
71_setnethtent(f)
72	int f;
73{
74
75	if (netf == NULL)
76		netf = fopen(_PATH_NETWORKS, "r" );
77	else
78		rewind(netf);
79	_net_stayopen |= f;
80}
81
82void
83_endnethtent()
84{
85
86	if (netf) {
87		fclose(netf);
88		netf = NULL;
89	}
90	_net_stayopen = 0;
91}
92
93struct netent *
94getnetent()
95{
96	char *p;
97	char *cp, **q;
98
99	if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
100		return (NULL);
101again:
102	p = fgets(line, sizeof line, netf);
103	if (p == NULL)
104		return (NULL);
105	if (*p == '#')
106		goto again;
107	cp = strpbrk(p, "#\n");
108	if (cp != NULL)
109		*cp = '\0';
110	net.n_name = p;
111	cp = strpbrk(p, " \t");
112	if (cp == NULL)
113		goto again;
114	*cp++ = '\0';
115	while (*cp == ' ' || *cp == '\t')
116		cp++;
117	p = strpbrk(cp, " \t");
118	if (p != NULL)
119		*p++ = '\0';
120	net.n_net = inet_network(cp);
121	net.n_addrtype = AF_INET;
122	q = net.n_aliases = net_aliases;
123	if (p != NULL)
124		cp = p;
125	while (cp && *cp) {
126		if (*cp == ' ' || *cp == '\t') {
127			cp++;
128			continue;
129		}
130		if (q < &net_aliases[MAXALIASES - 1])
131			*q++ = cp;
132		cp = strpbrk(cp, " \t");
133		if (cp != NULL)
134			*cp++ = '\0';
135	}
136	*q = NULL;
137	return (&net);
138}
139
140int
141_ht_getnetbyname(void *rval, void *cb_data, va_list ap)
142{
143	const char *name;
144	struct netent *p;
145	char **cp;
146
147	name = va_arg(ap, const char *);
148
149	setnetent(_net_stayopen);
150	while ( (p = getnetent()) ) {
151		if (strcasecmp(p->n_name, name) == 0)
152			break;
153		for (cp = p->n_aliases; *cp != 0; cp++)
154			if (strcasecmp(*cp, name) == 0)
155				goto found;
156	}
157found:
158	if (!_net_stayopen)
159		endnetent();
160	*(struct netent **)rval = p;
161	return (p != NULL) ? NS_SUCCESS : NS_NOTFOUND;
162}
163
164int
165_ht_getnetbyaddr(void *rval, void *cb_data, va_list ap)
166{
167	unsigned long net;
168	int type;
169	struct netent *p;
170
171	net = va_arg(ap, unsigned long);
172	type = va_arg(ap, int);
173
174	setnetent(_net_stayopen);
175	while ( (p = getnetent()) )
176		if (p->n_addrtype == type && p->n_net == net)
177			break;
178	if (!_net_stayopen)
179		endnetent();
180	*(struct netent **)rval = p;
181	return (p != NULL) ? NS_SUCCESS : NS_NOTFOUND;
182}
183