| 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 | * $FreeBSD: src/lib/libc/net/getnetbynis.c,v 1.11 1999/08/28 00:00:07 peter Exp $ |
| 26 | * $DragonFly: src/lib/libc/net/getnetbynis.c,v 1.4 2005/11/13 02:04:47 swildner Exp $ |
| 27 | */ |
| 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 | |
| 48 | #define MAXALIASES 35 |
| 49 | #define MAXADDRS 35 |
| 50 | |
| 51 | #ifdef YP |
| 52 | static char *host_aliases[MAXALIASES]; |
| 53 | |
| 54 | static struct netent * |
| 55 | _getnetbynis(const char *name, char *map, int af) |
| 56 | { |
| 57 | char *cp, **q; |
| 58 | static char *result; |
| 59 | int resultlen; |
| 60 | static struct netent h; |
| 61 | static char *domain = NULL; |
| 62 | static char ypbuf[YPMAXRECORD + 2]; |
| 63 | |
| 64 | switch(af) { |
| 65 | case AF_INET: |
| 66 | break; |
| 67 | default: |
| 68 | case AF_INET6: |
| 69 | errno = EAFNOSUPPORT; |
| 70 | return NULL; |
| 71 | } |
| 72 | |
| 73 | if (domain == NULL) |
| 74 | if (yp_get_default_domain (&domain)) |
| 75 | return (NULL); |
| 76 | |
| 77 | if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) |
| 78 | return (NULL); |
| 79 | |
| 80 | bcopy((char *)result, (char *)&ypbuf, resultlen); |
| 81 | ypbuf[resultlen] = '\0'; |
| 82 | free(result); |
| 83 | result = (char *)&ypbuf; |
| 84 | |
| 85 | if ((cp = index(result, '\n'))) |
| 86 | *cp = '\0'; |
| 87 | |
| 88 | cp = strpbrk(result, " \t"); |
| 89 | *cp++ = '\0'; |
| 90 | h.n_name = result; |
| 91 | |
| 92 | while (*cp == ' ' || *cp == '\t') |
| 93 | cp++; |
| 94 | |
| 95 | h.n_net = inet_network(cp); |
| 96 | h.n_addrtype = AF_INET; |
| 97 | |
| 98 | q = h.n_aliases = host_aliases; |
| 99 | cp = strpbrk(cp, " \t"); |
| 100 | if (cp != NULL) |
| 101 | *cp++ = '\0'; |
| 102 | while (cp && *cp) { |
| 103 | if (*cp == ' ' || *cp == '\t') { |
| 104 | cp++; |
| 105 | continue; |
| 106 | } |
| 107 | if (q < &host_aliases[MAXALIASES - 1]) |
| 108 | *q++ = cp; |
| 109 | cp = strpbrk(cp, " \t"); |
| 110 | if (cp != NULL) |
| 111 | *cp++ = '\0'; |
| 112 | } |
| 113 | *q = NULL; |
| 114 | return (&h); |
| 115 | } |
| 116 | #endif /* YP */ |
| 117 | |
| 118 | int |
| 119 | _nis_getnetbyname(void *rval, void *cb_data, va_list ap) |
| 120 | { |
| 121 | #ifdef YP |
| 122 | const char *name; |
| 123 | |
| 124 | name = va_arg(ap, const char *); |
| 125 | |
| 126 | *(struct netent **)rval = _getnetbynis(name, "networks.byname", AF_INET); |
| 127 | return (*(struct netent **)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND; |
| 128 | #else |
| 129 | return NS_UNAVAIL; |
| 130 | #endif |
| 131 | |
| 132 | } |
| 133 | |
| 134 | int |
| 135 | _nis_getnetbyaddr(void *rval, void *cb_data, va_list ap) |
| 136 | { |
| 137 | #ifdef YP |
| 138 | char *str, *cp; |
| 139 | unsigned long addr, net2; |
| 140 | int af, nn; |
| 141 | unsigned int netbr[4]; |
| 142 | char buf[MAXDNAME]; |
| 143 | |
| 144 | addr = va_arg(ap, unsigned long); |
| 145 | af = va_arg(ap, int); |
| 146 | |
| 147 | *(struct netent **)rval = NULL; |
| 148 | |
| 149 | if (af != AF_INET) { |
| 150 | errno = EAFNOSUPPORT; |
| 151 | return NS_UNAVAIL; |
| 152 | } |
| 153 | |
| 154 | for (nn = 4, net2 = addr; net2; net2 >>= 8) { |
| 155 | netbr[--nn] = net2 & 0xff; |
| 156 | } |
| 157 | |
| 158 | switch (nn) { |
| 159 | case 3: /* Class A */ |
| 160 | sprintf(buf, "%u", netbr[3]); |
| 161 | break; |
| 162 | case 2: /* Class B */ |
| 163 | sprintf(buf, "%u.%u", netbr[2], netbr[3]); |
| 164 | break; |
| 165 | case 1: /* Class C */ |
| 166 | sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); |
| 167 | break; |
| 168 | case 0: /* Class D - E */ |
| 169 | sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], |
| 170 | netbr[2], netbr[3]); |
| 171 | break; |
| 172 | } |
| 173 | |
| 174 | str = (char *)&buf; |
| 175 | cp = str + (strlen(str) - 2); |
| 176 | |
| 177 | while(!strcmp(cp, ".0")) { |
| 178 | *cp = '\0'; |
| 179 | cp = str + (strlen(str) - 2); |
| 180 | } |
| 181 | |
| 182 | *(struct netent **)rval = _getnetbynis(str, "networks.byaddr", af); |
| 183 | return (*(struct netent**)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND; |
| 184 | #else |
| 185 | return NS_UNAVAIL; |
| 186 | #endif /* YP */ |
| 187 | } |