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";
47static chat rcsid[] = "$Id: getnetbyht.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $";
48#endif /* LIBC_SCCS and not lint */
49
50#include <sys/types.h>
51#include <sys/socket.h>
52#include <netinet/in.h>
53#include <arpa/inet.h>
54#include <arpa/nameser.h>
55#include <netdb.h>
56#include <stdio.h>
57#include <string.h>
58
59#define	MAXALIASES	35
60
61static FILE *netf;
62static char line[BUFSIZ+1];
63static struct netent net;
64static char *net_aliases[MAXALIASES];
65static int _net_stayopen;
66
67void
68_setnethtent(int f)
69{
70
71	if (netf == NULL)
72		netf = fopen(_PATH_NETWORKS, "r" );
73	else
74		rewind(netf);
75	_net_stayopen |= f;
76}
77
78void
79_endnethtent()
80{
81
82	if (netf) {
83		fclose(netf);
84		netf = NULL;
85	}
86	_net_stayopen = 0;
87}
88
89struct netent *
90getnetent()
91{
92	char *p;
93	register char *cp, **q;
94
95	if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
96		return (NULL);
97again:
98	p = fgets(line, sizeof line, netf);
99	if (p == NULL)
100		return (NULL);
101	if (*p == '#')
102		goto again;
103	cp = strpbrk(p, "#\n");
104	if (cp == NULL)
105		goto again;
106	*cp = '\0';
107	net.n_name = p;
108	cp = strpbrk(p, " \t");
109	if (cp == NULL)
110		goto again;
111	*cp++ = '\0';
112	while (*cp == ' ' || *cp == '\t')
113		cp++;
114	p = strpbrk(cp, " \t");
115	if (p != NULL)
116		*p++ = '\0';
117	net.n_net = inet_network(cp);
118	net.n_addrtype = AF_INET;
119	q = net.n_aliases = net_aliases;
120	if (p != NULL)
121		cp = p;
122	while (cp && *cp) {
123		if (*cp == ' ' || *cp == '\t') {
124			cp++;
125			continue;
126		}
127		if (q < &net_aliases[MAXALIASES - 1])
128			*q++ = cp;
129		cp = strpbrk(cp, " \t");
130		if (cp != NULL)
131			*cp++ = '\0';
132	}
133	*q = NULL;
134	return (&net);
135}
136
137struct netent *
138_getnetbyhtname(register const char *name)
139{
140	register struct netent *p;
141	register char **cp;
142
143	setnetent(_net_stayopen);
144	while ( NULL != (p = getnetent()) ) {
145		if (strcasecmp(p->n_name, name) == 0)
146			break;
147		for (cp = p->n_aliases; *cp != 0; cp++)
148			if (strcasecmp(*cp, name) == 0)
149				goto found;
150	}
151found:
152	if (!_net_stayopen)
153		endnetent();
154	return (p);
155}
156
157struct netent *
158_getnetbyhtaddr(register unsigned long net, register int type)
159{
160	register struct netent *p;
161
162	setnetent(_net_stayopen);
163	while ( NULL != (p = getnetent()) )
164		if (p->n_addrtype == type && p->n_net == net)
165			break;
166	if (!_net_stayopen)
167		endnetent();
168	return (p);
169}
170