ypxfr.c revision 1.13
1 /* $NetBSD: ypxfr.c,v 1.13 2005/06/19 23:43:51 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 1.13 2005/06/19 23:43:51 lukem Exp $"); 37 #endif 38 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <sys/socket.h> 42 43 #include <netinet/in.h> 44 #include <arpa/inet.h> 45 46 #include <err.h> 47 #include <fcntl.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 *); 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 mapname[] = "ypdbXXXXXX"; 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 mktemp(mapname); 216 db = create_db(domain, map, mapname); 217 if (db == NULL) 218 status = YPPUSH_DBM; 219 220 /* Add ORDER */ 221 if (status > 0) 222 status = add_order(db, new_ordernum); 223 224 /* Add MASTER */ 225 if (status > 0) 226 status = add_master(client, domain, map, db); 227 228 /* Add INTERDOMAIN */ 229 if (status > 0) 230 status = add_interdomain(client, domain, map, db); 231 232 /* Add SECURE */ 233 if (status > 0) 234 status = add_secure(client, domain, map, db); 235 236 if (status > 0) { 237 callback.foreach = ypxfr_foreach; 238 get_map(client, domain, map, &callback); 239 } 240 241 /* Close db */ 242 if (db != NULL) 243 ypdb_close(db); 244 245 /* Rename db */ 246 if (status > 0) 247 status = install_db(domain, map, mapname); 248 else 249 status = unlink_db(domain, map, mapname); 250 } 251 252 punt: 253 xfr_status = status; 254 255 if (client != NULL) 256 clnt_destroy(client); 257 258 /* YP_CLEAR */ 259 if (!cflag) { 260 client = yp_bind_local(YPPROG, YPVERS); 261 status = send_clear(client); 262 clnt_destroy(client); 263 } 264 265 if (Cflag > 0) { 266 /* Send Response */ 267 client = yp_bind_host(ipadd, atoi(prog), 1, atoi(port), 0); 268 status = send_reply(client, xfr_status, atoi(tid)); 269 clnt_destroy(client); 270 } 271 272 exit (0); 273 } 274 275 static int 276 ypxfr_foreach(int status, char *keystr, int keylen, char *valstr, 277 int vallen, char *data) 278 { 279 datum key, val; 280 281 if (status == YP_NOMORE) 282 return (0); 283 284 keystr[keylen] = '\0'; 285 valstr[vallen] = '\0'; 286 287 key.dptr = keystr; 288 key.dsize = strlen(keystr); 289 290 val.dptr = valstr; 291 val.dsize = strlen(valstr); 292 293 ypdb_store(db, key, val, YPDB_INSERT); 294 295 return (0); 296 } 297 298 int 299 get_local_ordernum(char *domain, char *map, u_int *lordernum) 300 { 301 char map_path[1024]; 302 char order_key[] = YP_LAST_KEY; 303 char order[MAX_LAST_LEN+1]; 304 struct stat finfo; 305 DBM *db; 306 datum k, v; 307 int status; 308 309 status = YPPUSH_SUCC; 310 311 snprintf(map_path, sizeof(map_path), "%s/%s", YP_DB_PATH, domain); 312 313 /* Make sure we serve the domain. */ 314 if ((stat(map_path, &finfo)) != 0 || 315 (S_ISDIR(finfo.st_mode) == 0)) { 316 warnx("domain `%s' not found locally", domain); 317 status = YPPUSH_NODOM; 318 goto out; 319 } 320 321 /* Make sure we serve the map. */ 322 snprintf(map_path, sizeof(map_path), "%s/%s/%s%s", 323 YP_DB_PATH, domain, map, YPDB_SUFFIX); 324 if (stat(map_path, &finfo) != 0) { 325 status = YPPUSH_NOMAP; 326 goto out; 327 } 328 329 /* Open the map file. */ 330 snprintf(map_path, sizeof(map_path), "%s/%s/%s", 331 YP_DB_PATH, domain, map); 332 db = ypdb_open(map_path, O_RDONLY, 0444); 333 if (db == NULL) { 334 status = YPPUSH_DBM; 335 goto out; 336 } 337 338 k.dptr = (char *)&order_key; 339 k.dsize = YP_LAST_LEN; 340 341 v = ypdb_fetch(db, k); 342 343 if (v.dptr == NULL) 344 *lordernum = 0; 345 else { 346 strncpy(order, v.dptr, v.dsize); 347 order[v.dsize] = '\0'; 348 *lordernum = (u_int)atoi((char *)&order); 349 } 350 ypdb_close(db); 351 352 out: 353 if ((status == YPPUSH_NOMAP) || (status == YPPUSH_DBM)) { 354 *lordernum = 0; 355 status = YPPUSH_SUCC; 356 } 357 358 return (status); 359 } 360 361 int 362 get_remote_ordernum(CLIENT *client, char *domain, char *map, 363 u_int lordernum, u_int *rordernum) 364 { 365 int status; 366 367 status = yp_order_host(client, domain, map, (int *)rordernum); 368 369 if (status == 0) { 370 if (*rordernum <= lordernum) 371 status = YPPUSH_AGE; 372 else 373 status = YPPUSH_SUCC; 374 } 375 376 return status; 377 } 378 379 void 380 get_map(CLIENT *client, char *domain, char *map, 381 struct ypall_callback *incallback) 382 { 383 384 (void)yp_all_host(client, domain, map, incallback); 385 } 386 387 DBM * 388 create_db(char *domain, char *map, char *temp_map) 389 { 390 char db_temp[255]; 391 DBM *db; 392 393 snprintf(db_temp, sizeof(db_temp), "%s/%s/%s", 394 YP_DB_PATH, domain, temp_map); 395 396 db = ypdb_open(db_temp, O_RDWR|O_CREAT|O_EXCL, 0444); 397 398 return db; 399 } 400 401 int 402 install_db(char *domain, char *map, char *temp_map) 403 { 404 char db_name[255], db_temp[255]; 405 406 snprintf(db_name, sizeof(db_name), "%s/%s/%s%s", 407 YP_DB_PATH, domain, map, YPDB_SUFFIX); 408 409 snprintf(db_temp, sizeof(db_temp), "%s/%s/%s%s", 410 YP_DB_PATH, domain, temp_map, YPDB_SUFFIX); 411 412 if (rename(db_temp, db_name)) { 413 warn("can't rename `%s' -> `%s'", db_temp, db_name); 414 return YPPUSH_YPERR; 415 } 416 417 return YPPUSH_SUCC; 418 } 419 420 int 421 unlink_db(char *domain, char *map, char *temp_map) 422 { 423 char db_temp[255]; 424 425 snprintf(db_temp, sizeof(db_temp), "%s/%s/%s%s", 426 YP_DB_PATH, domain, temp_map, YPDB_SUFFIX); 427 428 if (unlink(db_temp)) { 429 warn("can't unlink `%s'", db_temp); 430 return YPPUSH_YPERR; 431 } 432 433 return YPPUSH_SUCC; 434 } 435 436 int 437 add_order(DBM *db, u_int ordernum) 438 { 439 char datestr[11]; 440 datum key, val; 441 char keystr[] = YP_LAST_KEY; 442 int status; 443 444 snprintf(datestr, sizeof(datestr), "%010d", ordernum); 445 446 key.dptr = keystr; 447 key.dsize = strlen(keystr); 448 449 val.dptr = datestr; 450 val.dsize = strlen(datestr); 451 452 status = ypdb_store(db, key, val, YPDB_INSERT); 453 if(status >= 0) 454 status = YPPUSH_SUCC; 455 else 456 status = YPPUSH_DBM; 457 458 return (status); 459 } 460 461 int 462 add_master(CLIENT *client, char *domain, char *map, DBM *db) 463 { 464 char keystr[] = YP_MASTER_KEY; 465 char *master; 466 int status; 467 datum key, val; 468 469 master = NULL; 470 471 /* Get MASTER */ 472 status = yp_master_host(client, domain, map, &master); 473 474 if (master != NULL) { 475 key.dptr = keystr; 476 key.dsize = strlen(keystr); 477 478 val.dptr = master; 479 val.dsize = strlen(master); 480 481 status = ypdb_store(db, key, val, YPDB_INSERT); 482 if (status >= 0) 483 status = YPPUSH_SUCC; 484 else 485 status = YPPUSH_DBM; 486 } 487 488 return status; 489 } 490 491 int 492 add_interdomain(CLIENT *client, char *domain, char *map, DBM *db) 493 { 494 char keystr[] = YP_INTERDOMAIN_KEY; 495 char *value; 496 int vallen; 497 int status; 498 datum k, v; 499 500 /* Get INTERDOMAIN */ 501 k.dptr = keystr; 502 k.dsize = strlen(keystr); 503 504 status = yp_match_host(client, domain, map, 505 k.dptr, k.dsize, &value, &vallen); 506 507 if (status == 0 && value) { 508 v.dptr = value; 509 v.dsize = vallen; 510 511 if (v.dptr != NULL) { 512 status = ypdb_store(db, k, v, YPDB_INSERT); 513 if (status >= 0) 514 status = YPPUSH_SUCC; 515 else 516 status = YPPUSH_DBM; 517 } 518 } 519 520 return status; 521 } 522 523 int 524 add_secure(CLIENT *client, char *domain, char *map, DBM *db) 525 { 526 char keystr[] = YP_SECURE_KEY; 527 char *value; 528 int vallen; 529 int status; 530 datum k, v; 531 532 /* Get SECURE */ 533 k.dptr = keystr; 534 k.dsize = strlen(keystr); 535 536 status = yp_match_host(client, domain, map, 537 k.dptr, k.dsize, &value, &vallen); 538 539 if (status > 0) { 540 v.dptr = value; 541 v.dsize = vallen; 542 543 if (v.dptr != NULL) { 544 status = ypdb_store(db, k, v, YPDB_INSERT); 545 if (status >= 0) 546 status = YPPUSH_SUCC; 547 else 548 status = YPPUSH_DBM; 549 } 550 } 551 552 return status; 553 } 554 555 int 556 send_clear(CLIENT *client) 557 { 558 struct timeval tv; 559 int r; 560 int status; 561 562 status = YPPUSH_SUCC; 563 564 tv.tv_sec = 10; 565 tv.tv_usec = 0; 566 567 /* Send CLEAR */ 568 r = clnt_call(client, YPPROC_CLEAR, xdr_void, 0, xdr_void, 0, tv); 569 if (r != RPC_SUCCESS) { 570 clnt_perror(client, "yp_clear: clnt_call"); 571 status = YPPUSH_RPC; 572 } 573 574 return status; 575 } 576 577 int 578 send_reply(CLIENT *client, int status, int tid) 579 { 580 struct timeval tv; 581 struct ypresp_xfr resp; 582 int r; 583 584 tv.tv_sec = 10; 585 tv.tv_usec = 0; 586 587 resp.transid = tid; 588 resp.xfrstat = status; 589 590 /* Send XFRRESP */ 591 r = clnt_call(client, YPPUSHPROC_XFRRESP, xdr_ypresp_xfr, &resp, 592 xdr_void, 0, tv); 593 if (r != RPC_SUCCESS) { 594 clnt_perror(client, "yppushresp_xdr: clnt_call"); 595 status = YPPUSH_RPC; 596 } 597 598 return status; 599 } 600
Indexes created Sun Oct 12 09:09:55 GMT 2025