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 #if defined(LIBC_SCCS) && !defined(lint) 27 static const char rcsid[] = 28 "$FreeBSD$"; 29 #endif /* LIBC_SCCS and not lint */ 30 31 #include <sys/param.h> 32 #include <sys/socket.h> 33 #include <netinet/in.h> 34 #include <arpa/inet.h> 35 #include <netdb.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <ctype.h> 39 #include <errno.h> 40 #include <string.h> 41 #include <stdarg.h> 42 #include <nsswitch.h> 43 #include <arpa/nameser.h> 44 #ifdef YP 45 #include <rpc/rpc.h> 46 #include <rpcsvc/yp_prot.h> 47 #include <rpcsvc/ypclnt.h> 48 #endif 49 50 #define MAXALIASES 35 51 #define MAXADDRS 35 52 53 #ifdef YP 54 static char *host_aliases[MAXALIASES]; 55 56 static struct netent * 57 _getnetbynis(const char *name, char *map, int af) 58 { 59 register char *cp, **q; 60 static char *result; 61 int resultlen; 62 static struct netent h; 63 static char *domain = (char *)NULL; 64 static char ypbuf[YPMAXRECORD + 2]; 65 66 switch(af) { 67 case AF_INET: 68 break; 69 default: 70 case AF_INET6: 71 errno = EAFNOSUPPORT; 72 return NULL; 73 } 74 75 if (domain == (char *)NULL) 76 if (yp_get_default_domain (&domain)) 77 return (NULL); 78 79 if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) 80 return (NULL); 81 82 bcopy((char *)result, (char *)&ypbuf, resultlen); 83 ypbuf[resultlen] = '\0'; 84 free(result); 85 result = (char *)&ypbuf; 86 87 if ((cp = index(result, '\n'))) 88 *cp = '\0'; 89 90 cp = strpbrk(result, " \t"); 91 *cp++ = '\0'; 92 h.n_name = result; 93 94 while (*cp == ' ' || *cp == '\t') 95 cp++; 96 97 h.n_net = inet_network(cp); 98 h.n_addrtype = AF_INET; 99 100 q = h.n_aliases = host_aliases; 101 cp = strpbrk(cp, " \t"); 102 if (cp != NULL) 103 *cp++ = '\0'; 104 while (cp && *cp) { 105 if (*cp == ' ' || *cp == '\t') { 106 cp++; 107 continue; 108 } 109 if (q < &host_aliases[MAXALIASES - 1]) 110 *q++ = cp; 111 cp = strpbrk(cp, " \t"); 112 if (cp != NULL) 113 *cp++ = '\0'; 114 } 115 *q = NULL; 116 return (&h); 117 } 118 #endif /* YP */ 119 120 int 121 _nis_getnetbyname(void *rval, void *cb_data, va_list ap) 122 { 123 #ifdef YP 124 const char *name; 125 126 name = va_arg(ap, const char *); 127 128 *(struct netent **)rval = _getnetbynis(name, "networks.byname", AF_INET); 129 return (*(struct netent **)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND; 130 #else 131 return NS_UNAVAIL; 132 #endif 133 134 } 135 136 int 137 _nis_getnetbyaddr(void *rval, void *cb_data, va_list ap) 138 { 139 #ifdef YP 140 unsigned long addr; 141 int af; 142 char *str, *cp; 143 unsigned long net2; 144 int nn; 145 unsigned int netbr[4]; 146 char buf[MAXDNAME]; 147 148 addr = va_arg(ap, unsigned long); 149 af = va_arg(ap, int); 150 151 *(struct netent **)rval = NULL; 152 153 if (af != AF_INET) { 154 errno = EAFNOSUPPORT; 155 return NS_UNAVAIL; 156 } 157 158 for (nn = 4, net2 = addr; net2; net2 >>= 8) { 159 netbr[--nn] = net2 & 0xff; 160 } 161 162 switch (nn) { 163 case 3: /* Class A */ 164 sprintf(buf, "%u", netbr[3]); 165 break; 166 case 2: /* Class B */ 167 sprintf(buf, "%u.%u", netbr[2], netbr[3]); 168 break; 169 case 1: /* Class C */ 170 sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); 171 break; 172 case 0: /* Class D - E */ 173 sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], 174 netbr[2], netbr[3]); 175 break; 176 } 177 178 str = (char *)&buf; 179 cp = str + (strlen(str) - 2); 180 181 while(!strcmp(cp, ".0")) { 182 *cp = '\0'; 183 cp = str + (strlen(str) - 2); 184 } 185 186 *(struct netent **)rval = _getnetbynis(str, "networks.byaddr", af); 187 return (*(struct netent**)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND; 188 #else 189 return NS_UNAVAIL; 190 #endif /* YP */ 191 } 192