bootparamd.c revision 1.20
1 /* $NetBSD: bootparamd.c,v 1.20 1999/06/06 02:47:48 thorpej Exp $ */ 2 3 /* 4 * This code is not copyright, and is placed in the public domain. 5 * Feel free to use and modify. Please send modifications and/or 6 * suggestions + bug fixes to Klas Heggemann <klas (at) nada.kth.se> 7 * 8 * Various small changes by Theo de Raadt <deraadt (at) fsa.ca> 9 * Parser rewritten (adding YP support) by Roland McGrath <roland (at) frob.com> 10 */ 11 12 #include <sys/cdefs.h> 13 #ifndef lint 14 __RCSID("$NetBSD: bootparamd.c,v 1.20 1999/06/06 02:47:48 thorpej Exp $"); 15 #endif 16 17 #include <sys/types.h> 18 #include <sys/ioctl.h> 19 #include <sys/stat.h> 20 #include <sys/socket.h> 21 22 #include <ctype.h> 23 #include <err.h> 24 #include <netdb.h> 25 #include <stdlib.h> 26 #include <stdio.h> 27 #include <string.h> 28 #include <syslog.h> 29 #include <unistd.h> 30 #include <util.h> 31 32 #include <netinet/in.h> 33 #include <arpa/inet.h> 34 35 #include <rpc/rpc.h> 36 #include <rpc/pmap_clnt.h> 37 #include <rpcsvc/bootparam_prot.h> 38 #include <rpcsvc/ypclnt.h> 39 40 #include "pathnames.h" 41 42 #define MAXLEN 800 43 44 static char hostname[MAX_MACHINE_NAME]; 45 static char askname[MAX_MACHINE_NAME]; 46 static char domain_name[MAX_MACHINE_NAME]; 47 48 extern void bootparamprog_1 __P((struct svc_req *, SVCXPRT *)); 49 50 int _rpcsvcdirty = 0; 51 int _rpcpmstart = 0; 52 int debug = 0; 53 int dolog = 0; 54 struct in_addr route_addr; 55 struct sockaddr_in my_addr; 56 extern char *__progname; 57 char *bootpfile = _PATH_BOOTPARAMS; 58 59 int main __P((int, char *[])); 60 int lookup_bootparam __P((char *, char *, char *, char **, char **)); 61 void usage __P((void)); 62 63 64 /* 65 * ever familiar 66 */ 67 int 68 main(argc, argv) 69 int argc; 70 char *argv[]; 71 { 72 SVCXPRT *transp; 73 struct hostent *he; 74 struct stat buf; 75 int c; 76 77 while ((c = getopt(argc, argv, "dsr:f:")) != -1) 78 switch (c) { 79 case 'd': 80 debug = 1; 81 break; 82 case 'r': 83 if (isdigit(*optarg)) { 84 if (inet_aton(optarg, &route_addr) != 0) 85 break; 86 } 87 he = gethostbyname(optarg); 88 if (he == 0) { 89 warnx("no such host: %s", optarg); 90 usage(); 91 } 92 memmove(&route_addr.s_addr, he->h_addr, he->h_length); 93 break; 94 case 'f': 95 bootpfile = optarg; 96 break; 97 case 's': 98 dolog = 1; 99 #ifndef LOG_DAEMON 100 openlog(__progname, 0, 0); 101 #else 102 openlog(__progname, 0, LOG_DAEMON); 103 setlogmask(LOG_UPTO(LOG_NOTICE)); 104 #endif 105 break; 106 default: 107 usage(); 108 } 109 110 if (stat(bootpfile, &buf)) 111 err(1, "%s", bootpfile); 112 113 if (route_addr.s_addr == 0) { 114 get_myaddress(&my_addr); 115 route_addr.s_addr = my_addr.sin_addr.s_addr; 116 } 117 if (!debug) { 118 if (daemon(0, 0)) 119 err(1, "can't detach from terminal"); 120 } 121 pidfile(NULL); 122 123 (void) pmap_unset(BOOTPARAMPROG, BOOTPARAMVERS); 124 125 transp = svcudp_create(RPC_ANYSOCK); 126 if (transp == NULL) 127 errx(1, "can't create udp service"); 128 129 if (!svc_register(transp, BOOTPARAMPROG, BOOTPARAMVERS, bootparamprog_1, 130 IPPROTO_UDP)) 131 errx(1, "unable to register BOOTPARAMPROG version %ld, udp", 132 BOOTPARAMVERS); 133 134 svc_run(); 135 errx(1, "svc_run returned"); 136 } 137 138 bp_whoami_res * 139 bootparamproc_whoami_1_svc(whoami, rqstp) 140 bp_whoami_arg *whoami; 141 struct svc_req *rqstp; 142 { 143 static bp_whoami_res res; 144 struct hostent *he; 145 struct in_addr haddr; 146 147 if (debug) 148 warnx("whoami got question for %d.%d.%d.%d", 149 255 & whoami->client_address.bp_address_u.ip_addr.net, 150 255 & whoami->client_address.bp_address_u.ip_addr.host, 151 255 & whoami->client_address.bp_address_u.ip_addr.lh, 152 255 & whoami->client_address.bp_address_u.ip_addr.impno); 153 if (dolog) 154 syslog(LOG_NOTICE, "whoami got question for %d.%d.%d.%d", 155 255 & whoami->client_address.bp_address_u.ip_addr.net, 156 255 & whoami->client_address.bp_address_u.ip_addr.host, 157 255 & whoami->client_address.bp_address_u.ip_addr.lh, 158 255 & whoami->client_address.bp_address_u.ip_addr.impno); 159 160 memmove((char *) &haddr, 161 (char *) &whoami->client_address.bp_address_u.ip_addr, 162 sizeof(haddr)); 163 he = gethostbyaddr((char *) &haddr, sizeof(haddr), AF_INET); 164 if (he) { 165 strncpy(askname, he->h_name, sizeof(askname)); 166 askname[sizeof(askname)-1] = 0; 167 } else { 168 strncpy(askname, inet_ntoa(haddr), sizeof(askname)); 169 askname[sizeof(askname)-1] = 0; 170 } 171 172 if (debug) 173 warnx("This is host %s", askname); 174 if (dolog) 175 syslog(LOG_NOTICE, "This is host %s", askname); 176 177 if (!lookup_bootparam(askname, hostname, NULL, NULL, NULL)) { 178 res.client_name = hostname; 179 getdomainname(domain_name, MAX_MACHINE_NAME); 180 res.domain_name = domain_name; 181 182 if (res.router_address.address_type != IP_ADDR_TYPE) { 183 res.router_address.address_type = IP_ADDR_TYPE; 184 memmove(&res.router_address.bp_address_u.ip_addr, 185 &route_addr.s_addr,4); 186 } 187 if (debug) 188 warnx("Returning %s %s %d.%d.%d.%d", 189 res.client_name, res.domain_name, 190 255 & res.router_address.bp_address_u.ip_addr.net, 191 255 & res.router_address.bp_address_u.ip_addr.host, 192 255 & res.router_address.bp_address_u.ip_addr.lh, 193 255 &res.router_address.bp_address_u.ip_addr.impno); 194 if (dolog) 195 syslog(LOG_NOTICE, "Returning %s %s %d.%d.%d.%d", 196 res.client_name, res.domain_name, 197 255 & res.router_address.bp_address_u.ip_addr.net, 198 255 & res.router_address.bp_address_u.ip_addr.host, 199 255 & res.router_address.bp_address_u.ip_addr.lh, 200 255 &res.router_address.bp_address_u.ip_addr.impno); 201 202 return (&res); 203 } 204 if (debug) 205 warnx("whoami failed"); 206 if (dolog) 207 syslog(LOG_NOTICE, "whoami failed"); 208 return (NULL); 209 } 210 211 212 bp_getfile_res * 213 bootparamproc_getfile_1_svc(getfile, rqstp) 214 bp_getfile_arg *getfile; 215 struct svc_req *rqstp; 216 { 217 static bp_getfile_res res; 218 struct hostent *he; 219 int err; 220 221 if (debug) 222 warnx("getfile got question for \"%s\" and file \"%s\"", 223 getfile->client_name, getfile->file_id); 224 225 if (dolog) 226 syslog(LOG_NOTICE, 227 "getfile got question for \"%s\" and file \"%s\"", 228 getfile->client_name, getfile->file_id); 229 230 he = NULL; 231 he = gethostbyname(getfile->client_name); 232 if (!he) 233 goto failed; 234 235 strncpy(askname, he->h_name, sizeof(askname)); 236 askname[sizeof(askname)-1] = 0; 237 err = lookup_bootparam(askname, NULL, getfile->file_id, 238 &res.server_name, &res.server_path); 239 if (err == 0) { 240 he = gethostbyname(res.server_name); 241 if (!he) 242 goto failed; 243 memmove(&res.server_address.bp_address_u.ip_addr, 244 he->h_addr, 4); 245 res.server_address.address_type = IP_ADDR_TYPE; 246 } else if (err == ENOENT && !strcmp(getfile->file_id, "dump")) { 247 /* Special for dump, answer with null strings. */ 248 res.server_name[0] = '\0'; 249 res.server_path[0] = '\0'; 250 memset(&res.server_address.bp_address_u.ip_addr, 0, 4); 251 } else { 252 failed: 253 if (debug) 254 warnx("getfile failed for %s", 255 getfile->client_name); 256 if (dolog) 257 syslog(LOG_NOTICE, 258 "getfile failed for %s", getfile->client_name); 259 return (NULL); 260 } 261 262 if (debug) 263 warnx( 264 "returning server:%s path:%s address: %d.%d.%d.%d", 265 res.server_name, res.server_path, 266 255 & res.server_address.bp_address_u.ip_addr.net, 267 255 & res.server_address.bp_address_u.ip_addr.host, 268 255 & res.server_address.bp_address_u.ip_addr.lh, 269 255 & res.server_address.bp_address_u.ip_addr.impno); 270 if (dolog) 271 syslog(LOG_NOTICE, 272 "returning server:%s path:%s address: %d.%d.%d.%d", 273 res.server_name, res.server_path, 274 255 & res.server_address.bp_address_u.ip_addr.net, 275 255 & res.server_address.bp_address_u.ip_addr.host, 276 255 & res.server_address.bp_address_u.ip_addr.lh, 277 255 & res.server_address.bp_address_u.ip_addr.impno); 278 return (&res); 279 } 280 281 282 int 283 lookup_bootparam(client, client_canonical, id, server, path) 284 char *client; 285 char *client_canonical; 286 char *id; 287 char **server; 288 char **path; 289 { 290 FILE *f = fopen(bootpfile, "r"); 291 #ifdef YP 292 static char *ypbuf = NULL; 293 static int ypbuflen = 0; 294 #endif 295 static char buf[BUFSIZ]; 296 char *bp, *word = NULL; 297 size_t idlen = id == NULL ? 0 : strlen(id); 298 int contin = 0; 299 int found = 0; 300 301 if (f == NULL) 302 return EINVAL; /* ? */ 303 304 while (fgets(buf, sizeof buf, f)) { 305 int wascontin = contin; 306 contin = buf[strlen(buf) - 2] == '\\'; 307 bp = buf + strspn(buf, " \t\n"); 308 309 switch (wascontin) { 310 case -1: 311 /* Continuation of uninteresting line */ 312 contin *= -1; 313 continue; 314 case 0: 315 /* New line */ 316 contin *= -1; 317 if (*bp == '#') 318 continue; 319 if ((word = strsep(&bp, " \t\n")) == NULL) 320 continue; 321 #ifdef YP 322 /* A + in the file means try YP now */ 323 if (!strcmp(word, "+")) { 324 char *ypdom; 325 326 if (yp_get_default_domain(&ypdom) || 327 yp_match(ypdom, "bootparams", client, 328 strlen(client), &ypbuf, &ypbuflen)) 329 continue; 330 bp = ypbuf; 331 word = client; 332 contin *= -1; 333 break; 334 } 335 #endif 336 /* See if this line's client is the one we are 337 * looking for */ 338 if (strcasecmp(word, client) != 0) { 339 /* 340 * If it didn't match, try getting the 341 * canonical host name of the client 342 * on this line and comparing that to 343 * the client we are looking for 344 */ 345 struct hostent *hp = gethostbyname(word); 346 if (hp == NULL ) { 347 if (debug) 348 warnx( 349 "Unknown bootparams host %s", word); 350 if (dolog) 351 syslog(LOG_NOTICE, 352 "Unknown bootparams host %s", word); 353 continue; 354 } 355 if (strcasecmp(hp->h_name, client)) 356 continue; 357 } 358 contin *= -1; 359 break; 360 case 1: 361 /* Continued line we want to parse below */ 362 break; 363 } 364 365 if (client_canonical) 366 strncpy(client_canonical, word, MAX_MACHINE_NAME); 367 368 /* We have found a line for CLIENT */ 369 if (id == NULL) { 370 (void) fclose(f); 371 return 0; 372 } 373 374 /* Look for a value for the parameter named by ID */ 375 while ((word = strsep(&bp, " \t\n")) != NULL) { 376 if (!strncmp(word, id, idlen) && word[idlen] == '=') { 377 /* We have found the entry we want */ 378 *server = &word[idlen + 1]; 379 *path = strchr(*server, ':'); 380 if (*path == NULL) 381 /* Malformed entry */ 382 continue; 383 *(*path)++ = '\0'; 384 (void) fclose(f); 385 return 0; 386 } 387 } 388 389 found = 1; 390 } 391 392 (void) fclose(f); 393 return found ? ENOENT : EPERM; 394 } 395 396 void 397 usage() 398 { 399 fprintf(stderr, 400 "usage: %s [-d] [-s] [-r router] [-f bootparmsfile]\n", __progname); 401 exit(1); 402 } 403
Indexes created Sat Sep 20 22:09:52 GMT 2025