getnetbyht.c revision 146904
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) 45static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93"; 46static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp"; 47#endif /* LIBC_SCCS and not lint */ 48#include <sys/cdefs.h> 49__FBSDID("$FreeBSD: head/lib/libc/net/getnetbyht.c 146904 2005-06-03 03:32:06Z ume $"); 50 51#include <sys/types.h> 52#include <sys/socket.h> 53#include <netinet/in.h> 54#include <arpa/inet.h> 55#include <arpa/nameser.h> 56#include <netdb.h> 57#include <stdio.h> 58#include <string.h> 59#include <stdarg.h> 60#include <nsswitch.h> 61#include "netdb_private.h" 62 63void 64_setnethtent(int f, struct netent_data *ned) 65{ 66 67 if (ned->netf == NULL) 68 ned->netf = fopen(_PATH_NETWORKS, "r"); 69 else 70 rewind(ned->netf); 71 ned->stayopen |= f; 72} 73 74void 75_endnethtent(struct netent_data *ned) 76{ 77 78 if (ned->netf) { 79 fclose(ned->netf); 80 ned->netf = NULL; 81 } 82 ned->stayopen = 0; 83} 84 85int 86getnetent_r(struct netent *ne, struct netent_data *ned) 87{ 88 char *p, *bp, *ep; 89 char *cp, **q; 90 int len; 91 char line[BUFSIZ + 1]; 92 93 if (ned->netf == NULL && 94 (ned->netf = fopen(_PATH_NETWORKS, "r")) == NULL) 95 return -1; 96again: 97 p = fgets(line, sizeof line, ned->netf); 98 if (p == NULL) 99 return -1; 100 if (*p == '#') 101 goto again; 102 cp = strpbrk(p, "#\n"); 103 if (cp != NULL) 104 *cp = '\0'; 105 bp = ned->netbuf; 106 ep = ned->netbuf + sizeof ned->netbuf; 107 ne->n_name = bp; 108 cp = strpbrk(p, " \t"); 109 if (cp == NULL) 110 goto again; 111 *cp++ = '\0'; 112 len = strlen(p) + 1; 113 if (ep - bp < len) { 114 h_errno = NO_RECOVERY; 115 return -1; 116 } 117 strlcpy(bp, p, ep - bp); 118 bp += len; 119 while (*cp == ' ' || *cp == '\t') 120 cp++; 121 p = strpbrk(cp, " \t"); 122 if (p != NULL) 123 *p++ = '\0'; 124 ne->n_net = inet_network(cp); 125 ne->n_addrtype = AF_INET; 126 q = ne->n_aliases = ned->net_aliases; 127 if (p != NULL) { 128 cp = p; 129 while (cp && *cp) { 130 if (*cp == ' ' || *cp == '\t') { 131 cp++; 132 continue; 133 } 134 if (q >= &ned->net_aliases[_MAXALIASES - 1]) 135 break; 136 p = strpbrk(cp, " \t"); 137 if (p != NULL) 138 *p++ = '\0'; 139 len = strlen(cp) + 1; 140 if (ep - bp < len) 141 break; 142 strlcpy(bp, cp, ep - bp); 143 *q++ = bp; 144 bp += len; 145 cp = p; 146 } 147 } 148 *q = NULL; 149 return 0; 150} 151 152struct netent * 153getnetent(void) 154{ 155 struct netdata *nd; 156 157 if ((nd = __netdata_init()) == NULL) 158 return NULL; 159 if (getnetent_r(&nd->net, &nd->data) != 0) 160 return NULL; 161 return &nd->net; 162} 163 164int 165_ht_getnetbyname(void *rval, void *cb_data, va_list ap) 166{ 167 const char *name; 168 struct netent *ne; 169 struct netent_data *ned; 170 char **cp; 171 int error; 172 173 name = va_arg(ap, const char *); 174 ne = va_arg(ap, struct netent *); 175 ned = va_arg(ap, struct netent_data *); 176 177 setnetent_r(ned->stayopen, ned); 178 while ((error = getnetent_r(ne, ned)) == 0) { 179 if (strcasecmp(ne->n_name, name) == 0) 180 break; 181 for (cp = ne->n_aliases; *cp != 0; cp++) 182 if (strcasecmp(*cp, name) == 0) 183 goto found; 184 } 185found: 186 if (!ned->stayopen) 187 endnetent_r(ned); 188 return (error == 0) ? NS_SUCCESS : NS_NOTFOUND; 189} 190 191int 192_ht_getnetbyaddr(void *rval, void *cb_data, va_list ap) 193{ 194 uint32_t net; 195 int type; 196 struct netent *ne; 197 struct netent_data *ned; 198 int error; 199 200 net = va_arg(ap, uint32_t); 201 type = va_arg(ap, int); 202 ne = va_arg(ap, struct netent *); 203 ned = va_arg(ap, struct netent_data *); 204 205 setnetent_r(ned->stayopen, ned); 206 while ((error = getnetent_r(ne, ned)) == 0) 207 if (ne->n_addrtype == type && ne->n_net == net) 208 break; 209 if (!ned->stayopen) 210 endnetent_r(ned); 211 return (error == 0) ? NS_SUCCESS : NS_NOTFOUND; 212} 213