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)
45 static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";
46 static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp";
47 static 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
61 static FILE *netf;
62 static char line[BUFSIZ+1];
63 static struct netent net;
64 static char *net_aliases[MAXALIASES];
65 static int _net_stayopen;
66
67 void
_setnethtent(int f)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
78 void
_endnethtent()79 _endnethtent()
80 {
81
82 if (netf) {
83 fclose(netf);
84 netf = NULL;
85 }
86 _net_stayopen = 0;
87 }
88
89 struct netent *
getnetent()90 getnetent()
91 {
92 char *p;
93 register char *cp, **q;
94
95 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
96 return (NULL);
97 again:
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
137 struct netent *
_getnetbyhtname(register const char * name)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 }
151 found:
152 if (!_net_stayopen)
153 endnetent();
154 return (p);
155 }
156
157 struct netent *
_getnetbyhtaddr(register unsigned long net,register int type)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