ypxfr.c revision 1.15
1 /* $NetBSD: ypxfr.c,v 1.15 2008/02/29 03:00:47 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Mats O Jansson <moj (at) stacken.kth.se> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mats O Jansson 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #ifndef lint 36 __RCSID("$NetBSD: ypxfr.c,v 1.15 2008/02/29 03:00:47 lukem Exp $"); 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <sys/socket.h> 43 44 #include <netinet/in.h> 45 #include <arpa/inet.h> 46 47 #include <err.h> 48 #include <netdb.h> 49 #include <string.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <syslog.h> 53 #include <unistd.h> 54 55 #include <rpc/rpc.h> 56 #include <rpc/xdr.h> 57 #include <rpcsvc/yp_prot.h> 58 #include <rpcsvc/ypclnt.h> 59 60 #include "yplib_host.h" 61 #include "ypdb.h" 62 #include "ypdef.h" 63 64 DBM *db; 65 66 static int ypxfr_foreach(int, char *, int, char *, int, char *); 67 68 int main(int, char *[]); 69 int get_local_ordernum(char *, char *, u_int *); 70 int get_remote_ordernum(CLIENT *, char *, char *, u_int, u_int *); 71 void get_map(CLIENT *, char *, char *, struct ypall_callback *); 72 DBM *create_db(char *, char *, char *, size_t); 73 int install_db(char *, char *, char *); 74 int unlink_db(char *, char *, char *); 75 int add_order(DBM *, u_int); 76 int add_master(CLIENT *, char *, char *, DBM *); 77 int add_interdomain(CLIENT *, char *, char *, DBM *); 78 int add_secure(CLIENT *, char *, char *, DBM *); 79 int send_clear(CLIENT *); 80 int send_reply(CLIENT *, int, int); 81 82 int 83 main(int argc, char **argv) 84 { 85 int need_usage = 0, cflag = 0, fflag = 0, Cflag = 0; 86 int ch; 87 char *domain; 88 char *host = NULL; 89 char *srcdomain = NULL; 90 char *tid = NULL; 91 char *prog = NULL; 92 char *ipadd = NULL; 93 char *port = NULL; 94 char *map = NULL; 95 u_int ordernum, new_ordernum; 96 struct ypall_callback callback; 97 CLIENT *client; 98 char temp_map[MAXPATHLEN]; 99 int status, xfr_status; 100 101 status = YPPUSH_SUCC; 102 client = NULL; 103 104 if (yp_get_default_domain(&domain)) 105 errx(1, "can't get YP domain name"); 106 107 while ((ch = getopt(argc, argv, "cd:fh:s:C:")) != -1) { 108 switch (ch) { 109 case 'c': 110 cflag = 1; 111 break; 112 113 case 'd': 114 domain = optarg; 115 break; 116 117 case 'f': 118 fflag = 1; 119 break; 120 121 case 'h': 122 host = optarg; 123 break; 124 125 case 's': 126 srcdomain = optarg; 127 break; 128 129 case 'C': 130 if (optind + 3 >= argc) { 131 need_usage = 1; 132 optind = argc; 133 break; 134 } 135 Cflag = 1; 136 tid = optarg; 137 prog = argv[optind++]; 138 ipadd = argv[optind++]; 139 port = argv[optind++]; 140 break; 141 142 default: 143 need_usage = 1; 144 } 145 } 146 argc -= optind; argv += optind; 147 148 if (argc != 1) 149 need_usage = 1; 150 151 map = argv[0]; 152 153 if (need_usage) { 154 status = YPPUSH_BADARGS; 155 fprintf(stderr, "usage: %s [-cf] [-d domain] [-h host] %s\n", 156 getprogname(), 157 "[-s domain] [-C tid prog ipadd port] mapname"); 158 goto punt; 159 } 160 161 #ifdef DEBUG 162 openlog("ypxfr", LOG_PID, LOG_DAEMON); 163 164 syslog(LOG_DEBUG, "ypxfr: Arguments:"); 165 syslog(LOG_DEBUG, "YP clear to local: %s", (cflag) ? "no" : "yes"); 166 syslog(LOG_DEBUG, " Force transfer: %s", (fflag) ? "yes" : "no"); 167 syslog(LOG_DEBUG, " domain: %s", domain); 168 syslog(LOG_DEBUG, " host: %s", host); 169 syslog(LOG_DEBUG, " source domain: %s", srcdomain); 170 syslog(LOG_DEBUG, " transid: %s", tid); 171 syslog(LOG_DEBUG, " prog: %s", prog); 172 syslog(LOG_DEBUG, " port: %s", port); 173 syslog(LOG_DEBUG, " ipadd: %s", ipadd); 174 syslog(LOG_DEBUG, " map: %s", map); 175 #endif 176 177 if (fflag != 0) 178 ordernum = 0; 179 else { 180 status = get_local_ordernum(domain, map, &ordernum); 181 if (status < 0) 182 goto punt; 183 } 184 185 #ifdef DEBUG 186 syslog(LOG_DEBUG, "Get Master"); 187 #endif 188 189 if (host == NULL) { 190 if (srcdomain == NULL) 191 status = yp_master(domain, map, &host); 192 else 193 status = yp_master(srcdomain, map, &host); 194 195 if (status == 0) 196 status = YPPUSH_SUCC; 197 else { 198 status = -status; 199 goto punt; 200 } 201 } 202 203 #ifdef DEBUG 204 syslog(LOG_DEBUG, "Connect host: %s", host); 205 #endif 206 207 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1); 208 209 status = get_remote_ordernum(client, domain, map, ordernum, 210 &new_ordernum); 211 212 213 if (status == YPPUSH_SUCC) { 214 /* Create temporary db */ 215 db = create_db(domain, map, temp_map, sizeof(temp_map)); 216 if (db == NULL) 217 status = YPPUSH_DBM; 218 219 /* Add ORDER */ 220 if (status > 0) 221 status = add_order(db, new_ordernum); 222 223 /* Add MASTER */ 224 if (status > 0) 225 status = add_master(client, domain, map, db); 226 227 /* Add INTERDOMAIN */ 228 if (status > 0) 229 status = add_interdomain(client, domain, map, db); 230 231 /* Add SECURE */ 232 if (status > 0) 233 status = add_secure(client, domain, map, db); 234 235 if (status > 0) { 236 callback.foreach = ypxfr_foreach; 237 get_map(client, domain, map, &callback); 238 } 239 240 /* Close db */ 241 if (db != NULL) 242 ypdb_close(db); 243 244 /* Rename db */ 245 if (status > 0) 246 status = install_db(domain, map, temp_map); 247 else 248 status = unlink_db(domain, map, temp_map); 249 } 250 251 punt: 252 xfr_status = status; 253 254 if (client != NULL) 255 clnt_destroy(client); 256 257 /* YP_CLEAR */ 258 if (!cflag) { 259 client = yp_bind_local(YPPROG, YPVERS); 260 status = send_clear(client); 261 clnt_destroy(client); 262 } 263 264 if (Cflag > 0) { 265 /* Send Response */ 266 client = yp_bind_host(ipadd, atoi(prog), 1, atoi(port), 0); 267 status = send_reply(client, xfr_status, atoi(tid)); 268 clnt_destroy(client); 269 } 270 271 exit (0); 272 } 273 274 static int 275 ypxfr_foreach(int status, char *keystr, int keylen, char *valstr, 276 int vallen, char *data) 277 { 278 datum key, val; 279 280 if (status == YP_NOMORE) 281 return (0); 282 283 keystr[keylen] = '\0'; 284 valstr[vallen] = '\0'; 285 286 key.dptr = keystr; 287 key.dsize = strlen(keystr); 288 289 val.dptr = valstr; 290 val.dsize = strlen(valstr); 291 292 ypdb_store(db, key, val, YPDB_INSERT); 293 294 return (0); 295 } 296 297 int 298 get_local_ordernum(char *domain, char *map, u_int *lordernum) 299 { 300 char map_path[1024]; 301 char order_key[] = YP_LAST_KEY; 302 char order[MAX_LAST_LEN+1]; 303 struct stat finfo; 304 DBM *db; 305 datum k, v; 306 int status; 307 308 status = YPPUSH_SUCC; 309 310 snprintf(map_path, sizeof(map_path), "%s/%s", YP_DB_PATH, domain); 311 312 /* Make sure we serve the domain. */ 313 if ((stat(map_path, &finfo)) != 0 || 314 (S_ISDIR(finfo.st_mode) == 0)) { 315 warnx("domain `%s' not found locally", domain); 316 status = YPPUSH_NODOM; 317 goto out; 318 } 319 320 /* Make sure we serve the map. */ 321 snprintf(map_path, sizeof(map_path), "%s/%s/%s%s", 322 YP_DB_PATH, domain, map, YPDB_SUFFIX); 323 if (stat(map_path, &finfo) != 0) { 324 status = YPPUSH_NOMAP; 325 goto out; 326 } 327 328 /* Open the map file. */ 329 snprintf(map_path, sizeof(map_path), "%s/%s/%s", 330 YP_DB_PATH, domain, map); 331 db = ypdb_open(map_path); 332 if (db == NULL) { 333 status = YPPUSH_DBM; 334 goto out; 335 } 336 337 k.dptr = (char *)&order_key; 338 k.dsize = YP_LAST_LEN; 339 340 v = ypdb_fetch(db, k); 341 342 if (v.dptr == NULL) 343 *lordernum = 0; 344 else { 345 strncpy(order, v.dptr, v.dsize); 346 order[v.dsize] = '\0'; 347 *lordernum = (u_int)atoi((char *)&order); 348 } 349 ypdb_close(db); 350 351 out: 352 if ((status == YPPUSH_NOMAP) || (status == YPPUSH_DBM)) { 353 *lordernum = 0; 354 status = YPPUSH_SUCC; 355 } 356 357 return (status); 358 } 359 360 int 361 get_remote_ordernum(CLIENT *client, char *domain, char *map, 362 u_int lordernum, u_int *rordernum) 363 { 364 int status; 365 366 status = yp_order_host(client, domain, map, (int *)rordernum); 367 368 if (status == 0) { 369 if (*rordernum <= lordernum) 370 status = YPPUSH_AGE; 371 else 372 status = YPPUSH_SUCC; 373 } 374 375 return status; 376 } 377 378 void 379 get_map(CLIENT *client, char *domain, char *map, 380 struct ypall_callback *incallback) 381 { 382 383 (void)yp_all_host(client, domain, map, incallback); 384 } 385 386 DBM * 387 create_db(char *domain, char *map, char *db_temp, size_t db_temp_len) 388 { 389 static const char template[] = "ypdbXXXXXX"; 390 DBM *db; 391 392 snprintf(db_temp, db_temp_len, "%s/%s/%s", 393 YP_DB_PATH, domain, template); 394 395 db = ypdb_mktemp(db_temp); 396 397 return db; 398 } 399 400 int 401 install_db(char *domain, char *map, char *db_temp) 402 { 403 char db_name[MAXPATHLEN]; 404 405 snprintf(db_name, sizeof(db_name), "%s/%s/%s%s", 406 YP_DB_PATH, domain, map, YPDB_SUFFIX); 407 408 if (rename(db_temp, db_name)) { 409 warn("can't rename `%s' -> `%s'", db_temp, db_name); 410 return YPPUSH_YPERR; 411 } 412 413 return YPPUSH_SUCC; 414 } 415 416 int 417 unlink_db(char *domain, char *map, char *db_temp) 418 { 419 420 if (unlink(db_temp)) { 421 warn("can't unlink `%s'", db_temp); 422 return YPPUSH_YPERR; 423 } 424 425 return YPPUSH_SUCC; 426 } 427 428 int 429 add_order(DBM *db, u_int ordernum) 430 { 431 char datestr[11]; 432 datum key, val; 433 char keystr[] = YP_LAST_KEY; 434 int status; 435 436 snprintf(datestr, sizeof(datestr), "%010d", ordernum); 437 438 key.dptr = keystr; 439 key.dsize = strlen(keystr); 440 441 val.dptr = datestr; 442 val.dsize = strlen(datestr); 443 444 status = ypdb_store(db, key, val, YPDB_INSERT); 445 if(status >= 0) 446 status = YPPUSH_SUCC; 447 else 448 status = YPPUSH_DBM; 449 450 return (status); 451 } 452 453 int 454 add_master(CLIENT *client, char *domain, char *map, DBM *db) 455 { 456 char keystr[] = YP_MASTER_KEY; 457 char *master; 458 int status; 459 datum key, val; 460 461 master = NULL; 462 463 /* Get MASTER */ 464 status = yp_master_host(client, domain, map, &master); 465 466 if (master != NULL) { 467 key.dptr = keystr; 468 key.dsize = strlen(keystr); 469 470 val.dptr = master; 471 val.dsize = strlen(master); 472 473 status = ypdb_store(db, key, val, YPDB_INSERT); 474 if (status >= 0) 475 status = YPPUSH_SUCC; 476 else 477 status = YPPUSH_DBM; 478 } 479 480 return status; 481 } 482 483 int 484 add_interdomain(CLIENT *client, char *domain, char *map, DBM *db) 485 { 486 char keystr[] = YP_INTERDOMAIN_KEY; 487 char *value; 488 int vallen; 489 int status; 490 datum k, v; 491 492 /* Get INTERDOMAIN */ 493 k.dptr = keystr; 494 k.dsize = strlen(keystr); 495 496 status = yp_match_host(client, domain, map, 497 k.dptr, k.dsize, &value, &vallen); 498 499 if (status == 0 && value) { 500 v.dptr = value; 501 v.dsize = vallen; 502 503 if (v.dptr != NULL) { 504 status = ypdb_store(db, k, v, YPDB_INSERT); 505 if (status >= 0) 506 status = YPPUSH_SUCC; 507 else 508 status = YPPUSH_DBM; 509 } 510 } 511 512 return status; 513 } 514 515 int 516 add_secure(CLIENT *client, char *domain, char *map, DBM *db) 517 { 518 char keystr[] = YP_SECURE_KEY; 519 char *value; 520 int vallen; 521 int status; 522 datum k, v; 523 524 /* Get SECURE */ 525 k.dptr = keystr; 526 k.dsize = strlen(keystr); 527 528 status = yp_match_host(client, domain, map, 529 k.dptr, k.dsize, &value, &vallen); 530 531 if (status == 0 && value > 0) { 532 v.dptr = value; 533 v.dsize = vallen; 534 535 if (v.dptr != NULL) { 536 status = ypdb_store(db, k, v, YPDB_INSERT); 537 if (status >= 0) 538 status = YPPUSH_SUCC; 539 else 540 status = YPPUSH_DBM; 541 } 542 } 543 544 return status; 545 } 546 547 int 548 send_clear(CLIENT *client) 549 { 550 struct timeval tv; 551 int r; 552 int status; 553 554 status = YPPUSH_SUCC; 555 556 tv.tv_sec = 10; 557 tv.tv_usec = 0; 558 559 /* Send CLEAR */ 560 r = clnt_call(client, YPPROC_CLEAR, xdr_void, 0, xdr_void, 0, tv); 561 if (r != RPC_SUCCESS) { 562 clnt_perror(client, "yp_clear: clnt_call"); 563 status = YPPUSH_RPC; 564 } 565 566 return status; 567 } 568 569 int 570 send_reply(CLIENT *client, int status, int tid) 571 { 572 struct timeval tv; 573 struct ypresp_xfr resp; 574 int r; 575 576 tv.tv_sec = 10; 577 tv.tv_usec = 0; 578 579 resp.transid = tid; 580 resp.xfrstat = status; 581 582 /* Send XFRRESP */ 583 r = clnt_call(client, YPPUSHPROC_XFRRESP, xdr_ypresp_xfr, &resp, 584 xdr_void, 0, tv); 585 if (r != RPC_SUCCESS) { 586 clnt_perror(client, "yppushresp_xdr: clnt_call"); 587 status = YPPUSH_RPC; 588 } 589 590 return status; 591 } 592
Indexes created Sun Oct 12 20:09:57 GMT 2025