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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)getnetent.c 8.1 (Berkeley) 6/4/93 30 * $FreeBSD: src/lib/libc/net/getnetbyht.c,v 1.7.2.1 2002/07/07 11:34:42 robert Exp $ 31 * $DragonFly: src/lib/libc/net/getnetbyht.c,v 1.4 2005/09/19 09:34:53 asmodai Exp $ 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 #include <sys/types.h> 45 #include <sys/socket.h> 46 #include <netinet/in.h> 47 #include <arpa/inet.h> 48 #include <arpa/nameser.h> 49 #include <netdb.h> 50 #include <stdio.h> 51 #include <string.h> 52 53 #define MAXALIASES 35 54 55 static FILE *netf; 56 static char line[BUFSIZ+1]; 57 static struct netent net; 58 static char *net_aliases[MAXALIASES]; 59 static int _net_stayopen; 60 61 void 62 _setnethtent(f) 63 int f; 64 { 65 66 if (netf == NULL) 67 netf = fopen(_PATH_NETWORKS, "r" ); 68 else 69 rewind(netf); 70 _net_stayopen |= f; 71 } 72 73 void 74 _endnethtent() 75 { 76 77 if (netf) { 78 fclose(netf); 79 netf = NULL; 80 } 81 _net_stayopen = 0; 82 } 83 84 struct netent * 85 getnetent() 86 { 87 char *p; 88 char *cp, **q; 89 90 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) 91 return (NULL); 92 again: 93 p = fgets(line, sizeof line, netf); 94 if (p == NULL) 95 return (NULL); 96 if (*p == '#') 97 goto again; 98 cp = strpbrk(p, "#\n"); 99 if (cp == NULL) 100 goto again; 101 *cp = '\0'; 102 net.n_name = p; 103 cp = strpbrk(p, " \t"); 104 if (cp == NULL) 105 goto again; 106 *cp++ = '\0'; 107 while (*cp == ' ' || *cp == '\t') 108 cp++; 109 p = strpbrk(cp, " \t"); 110 if (p != NULL) 111 *p++ = '\0'; 112 net.n_net = inet_network(cp); 113 net.n_addrtype = AF_INET; 114 q = net.n_aliases = net_aliases; 115 if (p != NULL) 116 cp = p; 117 while (cp && *cp) { 118 if (*cp == ' ' || *cp == '\t') { 119 cp++; 120 continue; 121 } 122 if (q < &net_aliases[MAXALIASES - 1]) 123 *q++ = cp; 124 cp = strpbrk(cp, " \t"); 125 if (cp != NULL) 126 *cp++ = '\0'; 127 } 128 *q = NULL; 129 return (&net); 130 } 131 132 struct netent * 133 _getnetbyhtname(name) 134 const char *name; 135 { 136 struct netent *p; 137 char **cp; 138 139 setnetent(_net_stayopen); 140 while ( (p = getnetent()) ) { 141 if (strcasecmp(p->n_name, name) == 0) 142 break; 143 for (cp = p->n_aliases; *cp != 0; cp++) 144 if (strcasecmp(*cp, name) == 0) 145 goto found; 146 } 147 found: 148 if (!_net_stayopen) 149 endnetent(); 150 return (p); 151 } 152 153 struct netent * 154 _getnetbyhtaddr(net, type) 155 unsigned long net; 156 int type; 157 { 158 struct netent *p; 159 160 setnetent(_net_stayopen); 161 while ( (p = getnetent()) ) 162 if (p->n_addrtype == type && p->n_net == net) 163 break; 164 if (!_net_stayopen) 165 endnetent(); 166 return (p); 167 } 168