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 1.5 2005/11/13 02:04:47 swildner 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(int f) 63 { 64 65 if (netf == NULL) 66 netf = fopen(_PATH_NETWORKS, "r" ); 67 else 68 rewind(netf); 69 _net_stayopen |= f; 70 } 71 72 void 73 _endnethtent(void) 74 { 75 76 if (netf) { 77 fclose(netf); 78 netf = NULL; 79 } 80 _net_stayopen = 0; 81 } 82 83 struct netent * 84 getnetent(void) 85 { 86 char *p; 87 char *cp, **q; 88 89 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) 90 return (NULL); 91 again: 92 p = fgets(line, sizeof line, netf); 93 if (p == NULL) 94 return (NULL); 95 if (*p == '#') 96 goto again; 97 cp = strpbrk(p, "#\n"); 98 if (cp == NULL) 99 goto again; 100 *cp = '\0'; 101 net.n_name = p; 102 cp = strpbrk(p, " \t"); 103 if (cp == NULL) 104 goto again; 105 *cp++ = '\0'; 106 while (*cp == ' ' || *cp == '\t') 107 cp++; 108 p = strpbrk(cp, " \t"); 109 if (p != NULL) 110 *p++ = '\0'; 111 net.n_net = inet_network(cp); 112 net.n_addrtype = AF_INET; 113 q = net.n_aliases = net_aliases; 114 if (p != NULL) 115 cp = p; 116 while (cp && *cp) { 117 if (*cp == ' ' || *cp == '\t') { 118 cp++; 119 continue; 120 } 121 if (q < &net_aliases[MAXALIASES - 1]) 122 *q++ = cp; 123 cp = strpbrk(cp, " \t"); 124 if (cp != NULL) 125 *cp++ = '\0'; 126 } 127 *q = NULL; 128 return (&net); 129 } 130 131 struct netent * 132 _getnetbyhtname(const char *name) 133 { 134 struct netent *p; 135 char **cp; 136 137 setnetent(_net_stayopen); 138 while ( (p = getnetent()) ) { 139 if (strcasecmp(p->n_name, name) == 0) 140 break; 141 for (cp = p->n_aliases; *cp != 0; cp++) 142 if (strcasecmp(*cp, name) == 0) 143 goto found; 144 } 145 found: 146 if (!_net_stayopen) 147 endnetent(); 148 return (p); 149 } 150 151 struct netent * 152 _getnetbyhtaddr(unsigned long net, int type) 153 { 154 struct netent *p; 155 156 setnetent(_net_stayopen); 157 while ( (p = getnetent()) ) 158 if (p->n_addrtype == type && p->n_net == net) 159 break; 160 if (!_net_stayopen) 161 endnetent(); 162 return (p); 163 } 164