1/*- 2 * Copyright (c) 1994, Garrett Wollman 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h> 27__FBSDID("$FreeBSD$"); 28 29#include <sys/param.h> 30#include <sys/socket.h> 31#include <netinet/in.h> 32#include <arpa/inet.h> 33#include <netdb.h> 34#include <resolv.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <ctype.h> 38#include <errno.h> 39#include <string.h> 40#include <stdarg.h> 41#include <nsswitch.h> 42#include <arpa/nameser.h> 43#ifdef YP 44#include <rpc/rpc.h> 45#include <rpcsvc/yp_prot.h> 46#include <rpcsvc/ypclnt.h> 47#endif 48#include "netdb_private.h" 49 50#ifdef YP 51static int 52_getnetbynis(const char *name, char *map, int af, struct netent *ne, 53 struct netent_data *ned) 54{ 55 char *p, *bp, *ep; 56 char *cp, **q; 57 char *result; 58 int resultlen, len; 59 char ypbuf[YPMAXRECORD + 2]; 60 61 switch(af) { 62 case AF_INET: 63 break; 64 default: 65 case AF_INET6: 66 errno = EAFNOSUPPORT; 67 return (-1); 68 } 69 70 if (ned->yp_domain == (char *)NULL) 71 if (yp_get_default_domain (&ned->yp_domain)) 72 return (-1); 73 74 if (yp_match(ned->yp_domain, map, name, strlen(name), &result, 75 &resultlen)) 76 return (-1); 77 78 bcopy((char *)result, (char *)&ypbuf, resultlen); 79 ypbuf[resultlen] = '\0'; 80 free(result); 81 result = (char *)&ypbuf; 82 83 if ((cp = strchr(result, '\n'))) 84 *cp = '\0'; 85 86 cp = strpbrk(result, " \t"); 87 *cp++ = '\0'; 88 bp = ned->netbuf; 89 ep = ned->netbuf + sizeof ned->netbuf; 90 len = strlen(result) + 1; 91 if (ep - bp < len) { 92 RES_SET_H_ERRNO(__res_state(), NO_RECOVERY); 93 return (-1); 94 } 95 strlcpy(bp, result, ep - bp); 96 ne->n_name = bp; 97 bp += len; 98 99 while (*cp == ' ' || *cp == '\t') 100 cp++; 101 102 ne->n_net = inet_network(cp); 103 ne->n_addrtype = AF_INET; 104 105 q = ne->n_aliases = ned->net_aliases; 106 cp = strpbrk(cp, " \t"); 107 if (cp != NULL) 108 *cp++ = '\0'; 109 while (cp && *cp) { 110 if (*cp == ' ' || *cp == '\t') { 111 cp++; 112 continue; 113 } 114 if (q > &ned->net_aliases[_MAXALIASES - 1]) 115 break; 116 p = strpbrk(cp, " \t"); 117 if (p != NULL) 118 *p++ = '\0'; 119 len = strlen(cp) + 1; 120 if (ep - bp < len) 121 break; 122 strlcpy(bp, cp, ep - bp); 123 *q++ = bp; 124 bp += len; 125 cp = p; 126 } 127 *q = NULL; 128 return (0); 129} 130#endif /* YP */ 131 132int 133_nis_getnetbyname(void *rval, void *cb_data, va_list ap) 134{ 135#ifdef YP 136 const char *name; 137 char *buffer; 138 size_t buflen; 139 int *errnop, *h_errnop; 140 struct netent *nptr, ne; 141 struct netent_data *ned; 142 res_state statp; 143 144 name = va_arg(ap, const char *); 145 nptr = va_arg(ap, struct netent *); 146 buffer = va_arg(ap, char *); 147 buflen = va_arg(ap, size_t); 148 errnop = va_arg(ap, int *); 149 h_errnop = va_arg(ap, int *); 150 151 statp = __res_state(); 152 if ((ned = __netent_data_init()) == NULL) { 153 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 154 *h_errnop = statp->res_h_errno; 155 return (NS_UNAVAIL); 156 } 157 158 if (_getnetbynis(name, "networks.byname", AF_INET, &ne, ned) != 0) { 159 *h_errnop = statp->res_h_errno; 160 return (NS_NOTFOUND); 161 } 162 if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { 163 *errnop = errno; 164 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 165 *h_errnop = statp->res_h_errno; 166 return (NS_RETURN); 167 } 168 *((struct netent **)rval) = nptr; 169 return (NS_SUCCESS); 170#else 171 return (NS_UNAVAIL); 172#endif 173 174} 175 176int 177_nis_getnetbyaddr(void *rval, void *cb_data, va_list ap) 178{ 179#ifdef YP 180 uint32_t addr; 181 int af; 182 char *buffer; 183 size_t buflen; 184 int *errnop, *h_errnop; 185 struct netent *nptr, ne; 186 struct netent_data *ned; 187 char *str, *cp; 188 uint32_t net2; 189 int nn; 190 unsigned int netbr[4]; 191 char buf[MAXDNAME]; 192 res_state statp; 193 194 addr = va_arg(ap, uint32_t); 195 af = va_arg(ap, int); 196 nptr = va_arg(ap, struct netent *); 197 buffer = va_arg(ap, char *); 198 buflen = va_arg(ap, size_t); 199 errnop = va_arg(ap, int *); 200 h_errnop = va_arg(ap, int *); 201 202 statp = __res_state(); 203 if ((ned = __netent_data_init()) == NULL) { 204 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 205 *h_errnop = statp->res_h_errno; 206 return (NS_UNAVAIL); 207 } 208 209 if (af != AF_INET) { 210 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 211 *h_errnop = statp->res_h_errno; 212 errno = EAFNOSUPPORT; 213 return (NS_UNAVAIL); 214 } 215 216 for (nn = 4, net2 = addr; net2; net2 >>= 8) { 217 netbr[--nn] = net2 & 0xff; 218 } 219 220 switch (nn) { 221 case 3: /* Class A */ 222 sprintf(buf, "%u", netbr[3]); 223 break; 224 case 2: /* Class B */ 225 sprintf(buf, "%u.%u", netbr[2], netbr[3]); 226 break; 227 case 1: /* Class C */ 228 sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); 229 break; 230 case 0: /* Class D - E */ 231 sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], 232 netbr[2], netbr[3]); 233 break; 234 } 235 236 str = (char *)&buf; 237 cp = str + (strlen(str) - 2); 238 239 while(!strcmp(cp, ".0")) { 240 *cp = '\0'; 241 cp = str + (strlen(str) - 2); 242 } 243 244 if (_getnetbynis(str, "networks.byaddr", af, &ne, ned) != 0) { 245 *h_errnop = statp->res_h_errno; 246 return (NS_NOTFOUND); 247 } 248 if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { 249 *errnop = errno; 250 RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 251 *h_errnop = statp->res_h_errno; 252 return (NS_RETURN); 253 } 254 *((struct netent **)rval) = nptr; 255 return (NS_SUCCESS); 256#else 257 return (NS_UNAVAIL); 258#endif /* YP */ 259} 260