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 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 79 _endnethtent() 80 { 81 82 if (netf) { 83 fclose(netf); 84 netf = NULL; 85 } 86 _net_stayopen = 0; 87 } 88 89 struct netent * 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 * 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 * 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
