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 ne->n_addrtype = AF_INET; 103 104 q = ne->n_aliases = ned->net_aliases; 105 cp = strpbrk(cp, " \t"); 106 if (cp != NULL) 107 *cp++ = '\0'; 108 while (cp && *cp) { 109 if (*cp == ' ' || *cp == '\t') { 110 cp++; 111 continue; 112 } 113 if (q > &ned->net_aliases[_MAXALIASES - 1]) 114 break; 115 p = strpbrk(cp, " \t"); 116 if (p != NULL) 117 *p++ = '\0'; 118 len = strlen(cp) + 1; 119 if (ep - bp < len) 120 break; 121 strlcpy(bp, cp, ep - bp); 122 *q++ = bp; 123 bp += len; 124 cp = p; 125 } 126 *q = NULL; 127 return 0; 128 } 129 #endif /* YP */ 130 131 int 132 _nis_getnetbyname(void *rval, void *cb_data, va_list ap) 133 { 134 #ifdef YP 135 const char *name; 136 struct netent *ne; 137 struct netent_data *ned; 138 int error; 139 140 name = va_arg(ap, const char *); 141 ne = va_arg(ap, struct netent *); 142 ned = va_arg(ap, struct netent_data *); 143 144 error = _getnetbynis(name, "networks.byname", AF_INET, ne, ned); 145 return (error == 0) ? NS_SUCCESS : NS_NOTFOUND; 146 #else 147 return NS_UNAVAIL; 148 #endif 149 150 } 151 152 int 153 _nis_getnetbyaddr(void *rval, void *cb_data, va_list ap) 154 { 155 #ifdef YP 156 uint32_t addr; 157 int af; 158 struct netent *ne; 159 struct netent_data *ned; 160 char *str, *cp; 161 uint32_t net2; 162 int nn; 163 unsigned int netbr[4]; 164 char buf[MAXDNAME]; 165 int error; 166 167 addr = va_arg(ap, uint32_t); 168 af = va_arg(ap, int); 169 ne = va_arg(ap, struct netent *); 170 ned = va_arg(ap, struct netent_data *); 171 172 if (af != AF_INET) { 173 errno = EAFNOSUPPORT; 174 return NS_UNAVAIL; 175 } 176 177 for (nn = 4, net2 = addr; net2; net2 >>= 8) { 178 netbr[--nn] = net2 & 0xff; 179 } 180 181 switch (nn) { 182 case 3: /* Class A */ 183 sprintf(buf, "%u", netbr[3]); 184 break; 185 case 2: /* Class B */ 186 sprintf(buf, "%u.%u", netbr[2], netbr[3]); 187 break; 188 case 1: /* Class C */ 189 sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); 190 break; 191 case 0: /* Class D - E */ 192 sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], 193 netbr[2], netbr[3]); 194 break; 195 } 196 197 str = (char *)&buf; 198 cp = str + (strlen(str) - 2); 199 200 while(!strcmp(cp, ".0")) { 201 *cp = '\0'; 202 cp = str + (strlen(str) - 2); 203 } 204 205 error = _getnetbynis(str, "networks.byaddr", af, ne, ned); 206 return (error == 0) ? NS_SUCCESS : NS_NOTFOUND; 207 #else 208 return NS_UNAVAIL; 209 #endif /* YP */ 210 } 211