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 #endif /* LIBC_SCCS and not lint */ 48 #include <sys/cdefs.h> 49 __FBSDID("$FreeBSD$"); 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 <resolv.h> 58 #include <stdio.h> 59 #include <string.h> 60 #include <stdarg.h> 61 #include <nsswitch.h> 62 #include "netdb_private.h" 63 64 void 65 _setnethtent(int f, struct netent_data *ned) 66 { 67 68 if (ned->netf == NULL) 69 ned->netf = fopen(_PATH_NETWORKS, "r"); 70 else 71 rewind(ned->netf); 72 ned->stayopen |= f; 73 } 74 75 void 76 _endnethtent(struct netent_data *ned) 77 { 78 79 if (ned->netf) { 80 fclose(ned->netf); 81 ned->netf = NULL; 82 } 83 ned->stayopen = 0; 84 } 85 86 static int 87 getnetent_p(struct netent *ne, struct netent_data *ned) 88 { 89 char *p, *bp, *ep; 90 char *cp, **q; 91 int len; 92 char line[BUFSIZ + 1]; 93 94 if (ned->netf == NULL && 95 (ned->netf = fopen(_PATH_NETWORKS, "r")) == NULL) 96 return (-1); 97 again: 98 p = fgets(line, sizeof line, ned->netf); 99 if (p == NULL) 100 return (-1); 101 if (*p == '#') 102 goto again; 103 cp = strpbrk(p, "#\n"); 104 if (cp != NULL) 105 *cp = '\0'; 106 bp = ned->netbuf; 107 ep = ned->netbuf + sizeof ned->netbuf; 108 ne->n_name = bp; 109 cp = strpbrk(p, " \t"); 110 if (cp == NULL) 111 goto again; 112 *cp++ = '\0'; 113 len = strlen(p) + 1; 114 if (ep - bp < len) { 115 RES_SET_H_ERRNO(__res_state(), NO_RECOVERY); 116 return (-1); 117 } 118 strlcpy(bp, p, ep - bp); 119 bp += len; 120 while (*cp == ' ' || *cp == '\t') 121 cp++; 122 p = strpbrk(cp, " \t"); 123 if (p != NULL) 124 *p++ = '\0'; 125 ne->n_net = inet_network(cp); 126 ne->n_addrtype = AF_INET; 127 q = ne->n_aliases = ned->net_aliases; 128 if (p != NULL) { 129 cp = p; 130 while (cp && *cp) { 131 if (*cp == ' ' || *cp == '\t') { 132 cp++; 133 continue; 134 } 135 if (q >= &ned->net_aliases[_MAXALIASES - 1]) 136 break; 137 p = strpbrk(cp, " \t"); 138 if (p != NULL) 139 *p++ = '\0'; 140 len = strlen(cp) + 1; 141 if (ep - bp < len) 142 break; 143 strlcpy(bp, cp, ep - bp); 144 *q++ = bp; 145 bp += len; 146 cp = p; 147 } 148 } 149 *q = NULL; 150 return (0); 151 } 152 153 int 154 getnetent_r(struct netent *nptr, char *buffer, size_t buflen, 155 struct netent **result, int *h_errnop) 156 { 157 struct netent_data *ned; 158 struct netent ne; 159 res_state statp; 160 161 statp = __res_state(); 162 if ((ned = __netent_data_init()) == NULL) { 163 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 164 *h_errnop = statp->res_h_errno; 165 return (-1); 166 } 167 if (getnetent_p(&ne, ned) != 0) 168 return (-1); 169 if (__copy_netent(&ne, nptr, buffer, buflen) != 0) 170 return (-1); 171 *result = nptr; 172 return (0); 173 } 174 175 struct netent * 176 getnetent(void) 177 { 178 struct netdata *nd; 179 struct netent *rval; 180 int ret_h_errno; 181 182 if ((nd = __netdata_init()) == NULL) 183 return (NULL); 184 if (getnetent_r(&nd->net, nd->data, sizeof(nd->data), &rval, 185 &ret_h_errno) != 0) 186 return (NULL); 187 return (rval); 188 } 189 190 int 191 _ht_getnetbyname(void *rval, void *cb_data, va_list ap) 192 { 193 const char *name; 194 char *buffer; 195 size_t buflen; 196 int *errnop, *h_errnop; 197 struct netent *nptr, ne; 198 struct netent_data *ned; 199 char **cp; 200 res_state statp; 201 int error; 202 203 name = va_arg(ap, const char *); 204 nptr = va_arg(ap, struct netent *); 205 buffer = va_arg(ap, char *); 206 buflen = va_arg(ap, size_t); 207 errnop = va_arg(ap, int *); 208 h_errnop = va_arg(ap, int *); 209 210 statp = __res_state(); 211 if ((ned = __netent_data_init()) == NULL) { 212 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 213 *h_errnop = statp->res_h_errno; 214 return (NS_UNAVAIL); 215 } 216 217 _setnethtent(ned->stayopen, ned); 218 while ((error = getnetent_p(&ne, ned)) == 0) { 219 if (strcasecmp(ne.n_name, name) == 0) 220 break; 221 for (cp = ne.n_aliases; *cp != 0; cp++) 222 if (strcasecmp(*cp, name) == 0) 223 goto found; 224 } 225 found: 226 if (!ned->stayopen) 227 _endnethtent(ned); 228 if (error != 0) { 229 *h_errnop = statp->res_h_errno; 230 return (NS_NOTFOUND); 231 } 232 if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { 233 *h_errnop = statp->res_h_errno; 234 return (NS_NOTFOUND); 235 } 236 *((struct netent **)rval) = nptr; 237 return (NS_SUCCESS); 238 } 239 240 int 241 _ht_getnetbyaddr(void *rval, void *cb_data, va_list ap) 242 { 243 uint32_t net; 244 int type; 245 char *buffer; 246 size_t buflen; 247 int *errnop, *h_errnop; 248 struct netent *nptr, ne; 249 struct netent_data *ned; 250 res_state statp; 251 int error; 252 253 net = va_arg(ap, uint32_t); 254 type = va_arg(ap, int); 255 nptr = va_arg(ap, struct netent *); 256 buffer = va_arg(ap, char *); 257 buflen = va_arg(ap, size_t); 258 errnop = va_arg(ap, int *); 259 h_errnop = va_arg(ap, int *); 260 261 statp = __res_state(); 262 if ((ned = __netent_data_init()) == NULL) { 263 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 264 *h_errnop = statp->res_h_errno; 265 return (NS_UNAVAIL); 266 } 267 268 _setnethtent(ned->stayopen, ned); 269 while ((error = getnetent_p(&ne, ned)) == 0) 270 if (ne.n_addrtype == type && ne.n_net == net) 271 break; 272 if (!ned->stayopen) 273 _endnethtent(ned); 274 if (error != 0) { 275 *h_errnop = statp->res_h_errno; 276 return (NS_NOTFOUND); 277 } 278 if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { 279 *h_errnop = statp->res_h_errno; 280 return (NS_NOTFOUND); 281 } 282 *((struct netent **)rval) = nptr; 283 return (NS_SUCCESS); 284 } 285