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[] = "$Id$"; 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 68 _setnethtent(f) 69 int f; 70 { 71 72 if (netf == NULL) 73 netf = fopen(_PATH_NETWORKS, "r" ); 74 else 75 rewind(netf); 76 _net_stayopen |= f; 77 } 78 79 void 80 _endnethtent() 81 { 82 83 if (netf) { 84 fclose(netf); 85 netf = NULL; 86 } 87 _net_stayopen = 0; 88 } 89 90 struct netent * 91 getnetent() 92 { 93 char *p; 94 register char *cp, **q; 95 96 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) 97 return (NULL); 98 again: 99 p = fgets(line, sizeof line, netf); 100 if (p == NULL) 101 return (NULL); 102 if (*p == '#') 103 goto again; 104 cp = strpbrk(p, "#\n"); 105 if (cp == NULL) 106 goto again; 107 *cp = '\0'; 108 net.n_name = p; 109 cp = strpbrk(p, " \t"); 110 if (cp == NULL) 111 goto again; 112 *cp++ = '\0'; 113 while (*cp == ' ' || *cp == '\t') 114 cp++; 115 p = strpbrk(cp, " \t"); 116 if (p != NULL) 117 *p++ = '\0'; 118 net.n_net = inet_network(cp); 119 net.n_addrtype = AF_INET; 120 q = net.n_aliases = net_aliases; 121 if (p != NULL) 122 cp = p; 123 while (cp && *cp) { 124 if (*cp == ' ' || *cp == '\t') { 125 cp++; 126 continue; 127 } 128 if (q < &net_aliases[MAXALIASES - 1]) 129 *q++ = cp; 130 cp = strpbrk(cp, " \t"); 131 if (cp != NULL) 132 *cp++ = '\0'; 133 } 134 *q = NULL; 135 return (&net); 136 } 137 138 struct netent * 139 _getnetbyhtname(name) 140 register const char *name; 141 { 142 register struct netent *p; 143 register char **cp; 144 145 setnetent(_net_stayopen); 146 while ( (p = getnetent()) ) { 147 if (strcasecmp(p->n_name, name) == 0) 148 break; 149 for (cp = p->n_aliases; *cp != 0; cp++) 150 if (strcasecmp(*cp, name) == 0) 151 goto found; 152 } 153 found: 154 if (!_net_stayopen) 155 endnetent(); 156 return (p); 157 } 158 159 struct netent * 160 _getnetbyhtaddr(net, type) 161 register unsigned long net; 162 register int type; 163 { 164 register struct netent *p; 165 166 setnetent(_net_stayopen); 167 while ( (p = getnetent()) ) 168 if (p->n_addrtype == type && p->n_net == net) 169 break; 170 if (!_net_stayopen) 171 endnetent(); 172 return (p); 173 } 174