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 <stdio.h> 35 #include <stdlib.h> 36 #include <ctype.h> 37 #include <errno.h> 38 #include <string.h> 39 #include <stdarg.h> 40 #include <nsswitch.h> 41 #include <arpa/nameser.h> 42 #ifdef YP 43 #include <rpc/rpc.h> 44 #include <rpcsvc/yp_prot.h> 45 #include <rpcsvc/ypclnt.h> 46 #endif 47 #include "netdb_private.h" 48 49 #ifdef YP 50 static int 51 _getnetbynis(const char *name, char *map, int af, struct netent *ne, 52 struct netent_data *ned) 53 { 54 char *p, *bp, *ep; 55 char *cp, **q; 56 char *result; 57 int resultlen, len; 58 char ypbuf[YPMAXRECORD + 2]; 59 60 switch(af) { 61 case AF_INET: 62 break; 63 default: 64 case AF_INET6: 65 errno = EAFNOSUPPORT; 66 return -1; 67 } 68 69 if (ned->yp_domain == (char *)NULL) 70 if (yp_get_default_domain (&ned->yp_domain)) 71 return -1; 72 73 if (yp_match(ned->yp_domain, map, name, strlen(name), &result, 74 &resultlen)) 75 return -1; 76 77 bcopy((char *)result, (char *)&ypbuf, resultlen); 78 ypbuf[resultlen] = '\0'; 79 free(result); 80 result = (char *)&ypbuf; 81 82 if ((cp = index(result, '\n'))) 83 *cp = '\0'; 84 85 cp = strpbrk(result, " \t"); 86 *cp++ = '\0'; 87 bp = ned->netbuf; 88 ep = ned->netbuf + sizeof ned->netbuf; 89 len = strlen(result) + 1; 90 if (ep - bp < len) { 91 h_errno = NO_RECOVERY; 92 return -1; 93 } 94 strlcpy(bp, result, ep - bp); 95 ne->n_name = bp; 96 bp += len; 97 98 while (*cp == ' ' || *cp == '\t') 99 cp++; 100 101 ne->n_net = inet_network(cp); 102 #if __LONG_BIT == 64 103 ne->__n_pad0 = 0; /* ABI compatibility */ 104 #endif 105 ne->n_addrtype = AF_INET; 106 107 q = ne->n_aliases = ned->net_aliases; 108 cp = strpbrk(cp, " \t"); 109 if (cp != NULL) 110 *cp++ = '\0'; 111 while (cp && *cp) { 112 if (*cp == ' ' || *cp == '\t') { 113 cp++; 114 continue; 115 } 116 if (q > &ned->net_aliases[_MAXALIASES - 1]) 117 break; 118 p = strpbrk(cp, " \t"); 119 if (p != NULL) 120 *p++ = '\0'; 121 len = strlen(cp) + 1; 122 if (ep - bp < len) 123 break; 124 strlcpy(bp, cp, ep - bp); 125 *q++ = bp; 126 bp += len; 127 cp = p; 128 } 129 *q = NULL; 130 return 0; 131 } 132 #endif /* YP */ 133 134 int 135 _nis_getnetbyname(void *rval, void *cb_data, va_list ap) 136 { 137 #ifdef YP 138 const char *name; 139 struct netent *ne; 140 struct netent_data *ned; 141 int error; 142 143 name = va_arg(ap, const char *); 144 ne = va_arg(ap, struct netent *); 145 ned = va_arg(ap, struct netent_data *); 146 147 error = _getnetbynis(name, "networks.byname", AF_INET, ne, ned); 148 return (error == 0) ? NS_SUCCESS : NS_NOTFOUND; 149 #else 150 return NS_UNAVAIL; 151 #endif 152 153 } 154 155 int 156 _nis_getnetbyaddr(void *rval, void *cb_data, va_list ap) 157 { 158 #ifdef YP 159 uint32_t addr; 160 int af; 161 struct netent *ne; 162 struct netent_data *ned; 163 char *str, *cp; 164 uint32_t net2; 165 int nn; 166 unsigned int netbr[4]; 167 char buf[MAXDNAME]; 168 int error; 169 170 addr = va_arg(ap, uint32_t); 171 af = va_arg(ap, int); 172 ne = va_arg(ap, struct netent *); 173 ned = va_arg(ap, struct netent_data *); 174 175 if (af != AF_INET) { 176 errno = EAFNOSUPPORT; 177 return NS_UNAVAIL; 178 } 179 180 for (nn = 4, net2 = addr; net2; net2 >>= 8) { 181 netbr[--nn] = net2 & 0xff; 182 } 183 184 switch (nn) { 185 case 3: /* Class A */ 186 sprintf(buf, "%u", netbr[3]); 187 break; 188 case 2: /* Class B */ 189 sprintf(buf, "%u.%u", netbr[2], netbr[3]); 190 break; 191 case 1: /* Class C */ 192 sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); 193 break; 194 case 0: /* Class D - E */ 195 sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], 196 netbr[2], netbr[3]); 197 break; 198 } 199 200 str = (char *)&buf; 201 cp = str + (strlen(str) - 2); 202 203 while(!strcmp(cp, ".0")) { 204 *cp = '\0'; 205 cp = str + (strlen(str) - 2); 206 } 207 208 error = _getnetbynis(str, "networks.byaddr", af, ne, ned); 209 return (error == 0) ? NS_SUCCESS : NS_NOTFOUND; 210 #else 211 return NS_UNAVAIL; 212 #endif /* YP */ 213 } 214