1 /* 2 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char rcsid[] = 32 "$FreeBSD$"; 33 #endif /* not lint */ 34 35 #include <sys/param.h> 36 #include <sys/types.h> 37 #include <sys/socket.h> 38 #include <netinet/in.h> 39 #include <arpa/inet.h> 40 #include <ctype.h> 41 #include <err.h> 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <rpc/rpc.h> 48 #include <rpc/xdr.h> 49 #include <rpcsvc/yp.h> 50 struct dom_binding{}; 51 #include <rpcsvc/ypclnt.h> 52 53 #define ERR_USAGE 1 /* bad arguments - display 'usage' message */ 54 #define ERR_NOSUCHHOST 2 /* no such host */ 55 #define ERR_NOBINDING 3 /* error from ypbind -- domain not bound */ 56 #define ERR_NOYPBIND 4 /* ypbind not running */ 57 #define ERR_NOMASTER 5 /* could not find master server */ 58 59 extern bool_t xdr_domainname(); 60 61 struct ypalias { 62 char *alias, *name; 63 } ypaliases[] = { 64 { "passwd", "passwd.byname" }, 65 { "master.passwd", "master.passwd.byname" }, 66 { "group", "group.byname" }, 67 { "networks", "networks.byaddr" }, 68 { "hosts", "hosts.byaddr" }, 69 { "protocols", "protocols.bynumber" }, 70 { "services", "services.byname" }, 71 { "aliases", "mail.aliases" }, 72 { "ethers", "ethers.byname" }, 73 }; 74 75 static void 76 usage() 77 { 78 fprintf(stderr, "%s\n%s\n", 79 "usage: ypwhich [-d domain] [[-t] -m [mname] | host]", 80 " ypwhich -x"); 81 exit(ERR_USAGE); 82 } 83 84 85 /* 86 * Like yp_bind except can query a specific host 87 */ 88 int 89 bind_host(dom, sin) 90 char *dom; 91 struct sockaddr_in *sin; 92 { 93 struct hostent *hent = NULL; 94 struct ypbind_resp ypbr; 95 struct timeval tv; 96 CLIENT *client; 97 int sock, r; 98 struct in_addr ss_addr; 99 100 sock = RPC_ANYSOCK; 101 tv.tv_sec = 15; 102 tv.tv_usec = 0; 103 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock); 104 if(client==NULL) { 105 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND)); 106 return YPERR_YPBIND; 107 } 108 109 tv.tv_sec = 5; 110 tv.tv_usec = 0; 111 r = clnt_call(client, YPBINDPROC_DOMAIN, 112 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 113 if( r != RPC_SUCCESS) { 114 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND)); 115 clnt_destroy(client); 116 return YPERR_YPBIND; 117 } else { 118 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 119 warnx("can't yp_bind: reason: %s", 120 ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error)); 121 clnt_destroy(client); 122 return r; 123 } 124 } 125 clnt_destroy(client); 126 127 ss_addr = *(struct in_addr *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 128 /*printf("%08x\n", ss_addr);*/ 129 hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET); 130 if (hent) 131 printf("%s\n", hent->h_name); 132 else 133 printf("%s\n", inet_ntoa(ss_addr)); 134 return 0; 135 } 136 137 int 138 main(argc, argv) 139 char **argv; 140 { 141 char *domainname = NULL, *master, *map = NULL; 142 struct ypmaplist *ypml, *y; 143 struct hostent *hent; 144 struct sockaddr_in sin; 145 int notrans, mode, getmap; 146 int c, r, i; 147 148 getmap = notrans = mode = 0; 149 while( (c=getopt(argc, argv, "xd:mt")) != -1) 150 switch(c) { 151 case 'x': 152 for(i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 153 printf("\"%s\" is an alias for \"%s\"\n", 154 ypaliases[i].alias, 155 ypaliases[i].name); 156 exit(0); 157 case 'd': 158 domainname = optarg; 159 break; 160 case 't': 161 notrans++; 162 break; 163 case 'm': 164 mode++; 165 break; 166 default: 167 usage(); 168 } 169 170 if(!domainname) 171 yp_get_default_domain(&domainname); 172 173 if(mode==0) { 174 switch(argc-optind) { 175 case 0: 176 bzero(&sin, sizeof sin); 177 sin.sin_family = AF_INET; 178 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 179 180 if(bind_host(domainname, &sin)) 181 exit(ERR_NOBINDING); 182 break; 183 case 1: 184 bzero(&sin, sizeof sin); 185 sin.sin_family = AF_INET; 186 if( (sin.sin_addr.s_addr=inet_addr(argv[optind]))==-1) { 187 hent = gethostbyname(argv[optind]); 188 if(!hent) 189 errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]); 190 bcopy((char *)hent->h_addr_list[0], 191 (char *)&sin.sin_addr, sizeof sin.sin_addr); 192 } 193 if(bind_host(domainname, &sin)) 194 exit(ERR_NOBINDING); 195 break; 196 default: 197 usage(); 198 } 199 exit(0); 200 } 201 202 if( argc-optind > 1) 203 usage(); 204 205 if(argv[optind]) { 206 map = argv[optind]; 207 for(i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 208 if( strcmp(map, ypaliases[i].alias) == 0) 209 map = ypaliases[i].name; 210 r = yp_master(domainname, map, &master); 211 switch(r) { 212 case 0: 213 printf("%s\n", master); 214 free(master); 215 break; 216 case YPERR_YPBIND: 217 errx(ERR_NOYPBIND, "not running ypbind"); 218 default: 219 errx(ERR_NOMASTER, "can't find master for map %s. reason: %s", 220 map, yperr_string(r)); 221 } 222 exit(0); 223 } 224 225 ypml = NULL; 226 r = yp_maplist(domainname, &ypml); 227 switch(r) { 228 case 0: 229 for(y=ypml; y; ) { 230 ypml = y; 231 r = yp_master(domainname, ypml->map, &master); 232 switch(r) { 233 case 0: 234 printf("%s %s\n", ypml->map, master); 235 free(master); 236 break; 237 default: 238 warnx("can't find the master of %s: reason: %s", 239 ypml->map, yperr_string(r)); 240 break; 241 } 242 y = ypml->next; 243 free(ypml); 244 } 245 break; 246 case YPERR_YPBIND: 247 errx(ERR_NOYPBIND, "not running ypbind"); 248 default: 249 errx(ERR_NOMASTER, "can't get map list for domain %s. reason: %s", 250 domainname, yperr_string(r)); 251 } 252 exit(0); 253 } 254