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 * @(#)getnetent.c 8.1 (Berkeley) 6/4/93 34 * $FreeBSD: src/lib/libc/net/getnetbyht.c,v 1.7.2.1 2002/07/07 11:34:42 robert Exp $ 35 * $DragonFly: src/lib/libc/net/getnetbyht.c,v 1.3 2004/10/25 19:38:01 drhodus Exp $ 36 */ 37 38 /* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro 39 * Dep. Matematica Universidade de Coimbra, Portugal, Europe 40 * 41 * Permission to use, copy, modify, and distribute this software for any 42 * purpose with or without fee is hereby granted, provided that the above 43 * copyright notice and this permission notice appear in all copies. 44 * 45 * from getnetent.c 1.1 (Coimbra) 93/06/02 46 */ 47 48 #include <sys/types.h> 49 #include <sys/socket.h> 50 #include <netinet/in.h> 51 #include <arpa/inet.h> 52 #include <arpa/nameser.h> 53 #include <netdb.h> 54 #include <stdio.h> 55 #include <string.h> 56 57 #define MAXALIASES 35 58 59 static FILE *netf; 60 static char line[BUFSIZ+1]; 61 static struct netent net; 62 static char *net_aliases[MAXALIASES]; 63 static int _net_stayopen; 64 65 void 66 _setnethtent(f) 67 int f; 68 { 69 70 if (netf == NULL) 71 netf = fopen(_PATH_NETWORKS, "r" ); 72 else 73 rewind(netf); 74 _net_stayopen |= f; 75 } 76 77 void 78 _endnethtent() 79 { 80 81 if (netf) { 82 fclose(netf); 83 netf = NULL; 84 } 85 _net_stayopen = 0; 86 } 87 88 struct netent * 89 getnetent() 90 { 91 char *p; 92 char *cp, **q; 93 94 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) 95 return (NULL); 96 again: 97 p = fgets(line, sizeof line, netf); 98 if (p == NULL) 99 return (NULL); 100 if (*p == '#') 101 goto again; 102 cp = strpbrk(p, "#\n"); 103 if (cp == NULL) 104 goto again; 105 *cp = '\0'; 106 net.n_name = p; 107 cp = strpbrk(p, " \t"); 108 if (cp == NULL) 109 goto again; 110 *cp++ = '\0'; 111 while (*cp == ' ' || *cp == '\t') 112 cp++; 113 p = strpbrk(cp, " \t"); 114 if (p != NULL) 115 *p++ = '\0'; 116 net.n_net = inet_network(cp); 117 net.n_addrtype = AF_INET; 118 q = net.n_aliases = net_aliases; 119 if (p != NULL) 120 cp = p; 121 while (cp && *cp) { 122 if (*cp == ' ' || *cp == '\t') { 123 cp++; 124 continue; 125 } 126 if (q < &net_aliases[MAXALIASES - 1]) 127 *q++ = cp; 128 cp = strpbrk(cp, " \t"); 129 if (cp != NULL) 130 *cp++ = '\0'; 131 } 132 *q = NULL; 133 return (&net); 134 } 135 136 struct netent * 137 _getnetbyhtname(name) 138 const char *name; 139 { 140 struct netent *p; 141 char **cp; 142 143 setnetent(_net_stayopen); 144 while ( (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 * 158 _getnetbyhtaddr(net, type) 159 unsigned long net; 160 int type; 161 { 162 struct netent *p; 163 164 setnetent(_net_stayopen); 165 while ( (p = getnetent()) ) 166 if (p->n_addrtype == type && p->n_net == net) 167 break; 168 if (!_net_stayopen) 169 endnetent(); 170 return (p); 171 } 172