ypxfr.c revision 1.18
1 /* $NetBSD: ypxfr.c,v 1.18 2009/11/05 15:23:55 chuck 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #ifndef lint 31 __RCSID("$NetBSD: ypxfr.c,v 1.18 2009/11/05 15:23:55 chuck Exp $"); 32 #endif 33 34 #include <sys/param.h> 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/socket.h> 38 39 #include <netinet/in.h> 40 #include <arpa/inet.h> 41 42 #include <err.h> 43 #include <netdb.h> 44 #include <string.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <syslog.h> 48 #include <unistd.h> 49 50 #include <rpc/rpc.h> 51 #include <rpc/xdr.h> 52 #include <rpcsvc/yp_prot.h> 53 #include <rpcsvc/ypclnt.h> 54 55 #include "yplib_host.h" 56 #include "ypdb.h" 57 #include "ypdef.h" 58 59 DBM *db; 60 61 static int yperr2yppush(int); 62 static int ypxfr_foreach(int, char *, int, char *, int, char *); 63 64 int main(int, char *[]); 65 int get_local_ordernum(char *, char *, u_int *); 66 int get_remote_ordernum(CLIENT *, char *, char *, u_int, u_int *); 67 void get_map(CLIENT *, char *, char *, struct ypall_callback *); 68 DBM *create_db(char *, char *, char *, size_t); 69 int install_db(char *, char *, char *); 70 int unlink_db(char *, char *, char *); 71 int add_order(DBM *, u_int); 72 int add_master(CLIENT *, char *, char *, DBM *); 73 int add_interdomain(CLIENT *, char *, char *, DBM *); 74 int add_secure(CLIENT *, char *, char *, DBM *); 75 int send_clear(CLIENT *); 76 int send_reply(CLIENT *, int, int); 77 78 int 79 main(int argc, char **argv) 80 { 81 int need_usage = 0, cflag = 0, fflag = 0, Cflag = 0; 82 int ch; 83 char *domain; 84 char *host = NULL; 85 char *srcdomain = NULL; 86 char *tid = NULL; 87 char *prog = NULL; 88 char *ipadd = NULL; 89 char *port = NULL; 90 char *map = NULL; 91 u_int ordernum, new_ordernum; 92 struct ypall_callback callback; 93 CLIENT *client; 94 char temp_map[MAXPATHLEN]; 95 int status, xfr_status; 96 97 status = YPPUSH_SUCC; 98 client = NULL; 99 100 if (yp_get_default_domain(&domain)) 101 errx(1, "can't get YP domain name"); 102 103 while ((ch = getopt(argc, argv, "cd:fh:s:C:")) != -1) { 104 switch (ch) { 105 case 'c': 106 cflag = 1; 107 break; 108 109 case 'd': 110 domain = optarg; 111 break; 112 113 case 'f': 114 fflag = 1; 115 break; 116 117 case 'h': 118 host = optarg; 119 break; 120 121 case 's': 122 srcdomain = optarg; 123 break; 124 125 case 'C': 126 if (optind + 3 >= argc) { 127 need_usage = 1; 128 optind = argc; 129 break; 130 } 131 Cflag = 1; 132 tid = optarg; 133 prog = argv[optind++]; 134 ipadd = argv[optind++]; 135 port = argv[optind++]; 136 break; 137 138 default: 139 need_usage = 1; 140 } 141 } 142 argc -= optind; argv += optind; 143 144 if (argc != 1) 145 need_usage = 1; 146 147 map = argv[0]; 148 149 if (need_usage) { 150 status = YPPUSH_BADARGS; 151 fprintf(stderr, "usage: %s [-cf] [-d domain] [-h host] %s\n", 152 getprogname(), 153 "[-s domain] [-C tid prog ipadd port] mapname"); 154 exit(1); 155 } 156 157 #ifdef DEBUG 158 openlog("ypxfr", LOG_PID, LOG_DAEMON); 159 160 syslog(LOG_DEBUG, "ypxfr: Arguments:"); 161 syslog(LOG_DEBUG, "YP clear to local: %s", (cflag) ? "no" : "yes"); 162 syslog(LOG_DEBUG, " Force transfer: %s", (fflag) ? "yes" : "no"); 163 syslog(LOG_DEBUG, " domain: %s", domain); 164 syslog(LOG_DEBUG, " host: %s", host); 165 syslog(LOG_DEBUG, " source domain: %s", srcdomain); 166 syslog(LOG_DEBUG, " transid: %s", tid); 167 syslog(LOG_DEBUG, " prog: %s", prog); 168 syslog(LOG_DEBUG, " port: %s", port); 169 syslog(LOG_DEBUG, " ipadd: %s", ipadd); 170 syslog(LOG_DEBUG, " map: %s", map); 171 #endif 172 173 if (fflag != 0) 174 ordernum = 0; 175 else { 176 status = get_local_ordernum(domain, map, &ordernum); 177 if (status < 0) 178 goto punt; 179 } 180 181 #ifdef DEBUG 182 syslog(LOG_DEBUG, "Get Master"); 183 #endif 184 185 if (host == NULL) { 186 if (srcdomain == NULL) 187 status = yp_master(domain, map, &host); 188 else 189 status = yp_master(srcdomain, map, &host); 190 191 if (status == 0) 192 status = YPPUSH_SUCC; 193 else { 194 status = YPPUSH_MADDR; 195 goto punt; 196 } 197 } 198 199 #ifdef DEBUG 200 syslog(LOG_DEBUG, "Connect host: %s", host); 201 #endif 202 203 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1); 204 205 status = get_remote_ordernum(client, domain, map, ordernum, 206 &new_ordernum); 207 208 209 if (status == YPPUSH_SUCC) { 210 /* Create temporary db */ 211 db = create_db(domain, map, temp_map, sizeof(temp_map)); 212 if (db == NULL) 213 status = YPPUSH_DBM; 214 215 /* Add ORDER */ 216 if (status > 0) 217 status = add_order(db, new_ordernum); 218 219 /* Add MASTER */ 220 if (status > 0) 221 status = add_master(client, domain, map, db); 222 223 /* Add INTERDOMAIN */ 224 if (status > 0) 225 status = add_interdomain(client, domain, map, db); 226 227 /* Add SECURE */ 228 if (status > 0) 229 status = add_secure(client, domain, map, db); 230 231 if (status > 0) { 232 callback.foreach = ypxfr_foreach; 233 get_map(client, domain, map, &callback); 234 } 235 236 /* Close db */ 237 if (db != NULL) 238 ypdb_close(db); 239 240 /* Rename db */ 241 if (status > 0) 242 status = install_db(domain, map, temp_map); 243 else 244 status = unlink_db(domain, map, temp_map); 245 } 246 247 punt: 248 xfr_status = status; 249 250 if (client != NULL) 251 clnt_destroy(client); 252 253 /* YP_CLEAR */ 254 if (!cflag) { 255 client = yp_bind_local(YPPROG, YPVERS); 256 status = send_clear(client); 257 clnt_destroy(client); 258 } 259 260 if (Cflag > 0) { 261 /* Send Response */ 262 client = yp_bind_host(ipadd, atoi(prog), 1, atoi(port), 0); 263 status = send_reply(client, xfr_status, atoi(tid)); 264 clnt_destroy(client); 265 } 266 267 exit (0); 268 } 269 270 /* 271 * yperr2yppush: convert error codes from functions like yp_order_host, 272 * yp_master_host, and yp_match_host into YPPUSH rpc status values. 273 */ 274 static int 275 yperr2yppush(int yperr) { 276 switch (yperr) { 277 case YPERR_DOMAIN: 278 return(YPPUSH_NODOM); 279 case YPERR_MAP: 280 return(YPPUSH_NOMAP); 281 case YPERR_KEY: 282 return(YPPUSH_YPERR); 283 case YPERR_BADDB: 284 return(YPPUSH_YPERR); 285 } 286 287 /* 288 * generic error status for the rest (BADARGS, RPC, YPERR, RESRC, 289 * NOMORE, PMAP, YPBIND, YPSERV, NODOM, VERS, ACCESS, BUSY) 290 */ 291 return(YPPUSH_XFRERR); /* generic error status */ 292 } 293 294 static int 295 ypxfr_foreach(int status, char *keystr, int keylen, char *valstr, 296 int vallen, char *data) 297 { 298 datum key, val; 299 300 if (status == YP_NOMORE) 301 return (0); 302 303 keystr[keylen] = '\0'; 304 valstr[vallen] = '\0'; 305 306 key.dptr = keystr; 307 key.dsize = strlen(keystr); 308 309 val.dptr = valstr; 310 val.dsize = strlen(valstr); 311 312 /* XXX: suspect... ignoring return value here */ 313 ypdb_store(db, key, val, YPDB_INSERT); 314 315 return (0); 316 } 317 318 int 319 get_local_ordernum(char *domain, char *map, u_int *lordernum) 320 { 321 char map_path[1024]; 322 char order_key[] = YP_LAST_KEY; 323 char order[MAX_LAST_LEN+1]; 324 struct stat finfo; 325 DBM *ldb; 326 datum k, v; 327 unsigned int status; 328 329 status = YPPUSH_SUCC; 330 331 snprintf(map_path, sizeof(map_path), "%s/%s", YP_DB_PATH, domain); 332 333 /* Make sure we serve the domain. */ 334 if ((stat(map_path, &finfo)) != 0 || 335 (S_ISDIR(finfo.st_mode) == 0)) { 336 warnx("domain `%s' not found locally", domain); 337 status = YPPUSH_NODOM; 338 goto out; 339 } 340 341 /* Make sure we serve the map. */ 342 snprintf(map_path, sizeof(map_path), "%s/%s/%s%s", 343 YP_DB_PATH, domain, map, YPDB_SUFFIX); 344 if (stat(map_path, &finfo) != 0) { 345 status = YPPUSH_NOMAP; 346 goto out; 347 } 348 349 /* Open the map file. */ 350 snprintf(map_path, sizeof(map_path), "%s/%s/%s", 351 YP_DB_PATH, domain, map); 352 ldb = ypdb_open(map_path); 353 if (ldb == NULL) { 354 status = YPPUSH_DBM; 355 goto out; 356 } 357 358 k.dptr = (char *)&order_key; 359 k.dsize = YP_LAST_LEN; 360 361 v = ypdb_fetch(ldb, k); 362 363 if (v.dptr == NULL) 364 *lordernum = 0; 365 else { 366 strncpy(order, v.dptr, v.dsize); 367 order[v.dsize] = '\0'; 368 *lordernum = (u_int)atoi((char *)&order); 369 } 370 ypdb_close(ldb); 371 372 out: 373 if ((status == YPPUSH_NOMAP) || (status == YPPUSH_DBM)) { 374 *lordernum = 0; 375 status = YPPUSH_SUCC; 376 } 377 378 return (status); 379 } 380 381 int 382 get_remote_ordernum(CLIENT *client, char *domain, char *map, 383 u_int lordernum, u_int *rordernum) 384 { 385 int status; 386 387 status = yp_order_host(client, domain, map, (int *)rordernum); 388 389 if (status == 0) { 390 if (*rordernum <= lordernum) 391 status = YPPUSH_AGE; 392 else 393 status = YPPUSH_SUCC; 394 } else { 395 status = yperr2yppush(status); 396 } 397 398 return status; 399 } 400 401 void 402 get_map(CLIENT *client, char *domain, char *map, 403 struct ypall_callback *incallback) 404 { 405 406 (void)yp_all_host(client, domain, map, incallback); 407 } 408 409 DBM * 410 create_db(char *domain, char *map, char *db_temp, size_t db_temp_len) 411 { 412 static const char template[] = "ypdbXXXXXX"; 413 DBM *ldb; 414 415 snprintf(db_temp, db_temp_len, "%s/%s/%s", 416 YP_DB_PATH, domain, template); 417 418 ldb = ypdb_mktemp(db_temp); 419 420 return ldb; 421 } 422 423 int 424 install_db(char *domain, char *map, char *db_temp) 425 { 426 char db_name[MAXPATHLEN]; 427 428 snprintf(db_name, sizeof(db_name), "%s/%s/%s%s", 429 YP_DB_PATH, domain, map, YPDB_SUFFIX); 430 431 if (rename(db_temp, db_name)) { 432 warn("can't rename `%s' -> `%s'", db_temp, db_name); 433 return YPPUSH_YPERR; 434 } 435 436 return YPPUSH_SUCC; 437 } 438 439 int 440 unlink_db(char *domain, char *map, char *db_temp) 441 { 442 443 if (unlink(db_temp)) { 444 warn("can't unlink `%s'", db_temp); 445 return YPPUSH_YPERR; 446 } 447 448 return YPPUSH_SUCC; 449 } 450 451 int 452 add_order(DBM *ldb, u_int ordernum) 453 { 454 char datestr[11]; 455 datum key, val; 456 char keystr[] = YP_LAST_KEY; 457 int status; 458 459 snprintf(datestr, sizeof(datestr), "%010d", ordernum); 460 461 key.dptr = keystr; 462 key.dsize = strlen(keystr); 463 464 val.dptr = datestr; 465 val.dsize = strlen(datestr); 466 467 status = ypdb_store(ldb, key, val, YPDB_INSERT); 468 if(status >= 0) 469 status = YPPUSH_SUCC; 470 else 471 status = YPPUSH_DBM; 472 473 return (status); 474 } 475 476 int 477 add_master(CLIENT *client, char *domain, char *map, DBM *ldb) 478 { 479 char keystr[] = YP_MASTER_KEY; 480 char *master; 481 int status; 482 datum key, val; 483 484 master = NULL; 485 486 /* Get MASTER */ 487 status = yp_master_host(client, domain, map, &master); 488 489 if (master != NULL) { 490 key.dptr = keystr; 491 key.dsize = strlen(keystr); 492 493 val.dptr = master; 494 val.dsize = strlen(master); 495 496 status = ypdb_store(ldb, key, val, YPDB_INSERT); 497 if (status >= 0) 498 status = YPPUSH_SUCC; 499 else 500 status = YPPUSH_DBM; 501 } else { 502 status = yperr2yppush(status); 503 } 504 505 return status; 506 } 507 508 int 509 add_interdomain(CLIENT *client, char *domain, char *map, DBM *ldb) 510 { 511 char keystr[] = YP_INTERDOMAIN_KEY; 512 char *value; 513 int vallen; 514 int status; 515 datum k, v; 516 517 /* Get INTERDOMAIN */ 518 k.dptr = keystr; 519 k.dsize = strlen(keystr); 520 521 status = yp_match_host(client, domain, map, 522 k.dptr, k.dsize, &value, &vallen); 523 524 if (status == 0 && value) { 525 v.dptr = value; 526 v.dsize = vallen; 527 528 if (v.dptr != NULL) { 529 status = ypdb_store(ldb, k, v, YPDB_INSERT); 530 if (status >= 0) 531 status = YPPUSH_SUCC; 532 else 533 status = YPPUSH_DBM; 534 } 535 } else { 536 status = yperr2yppush(status); 537 } 538 539 return status; 540 } 541 542 int 543 add_secure(CLIENT *client, char *domain, char *map, DBM *ldb) 544 { 545 char keystr[] = YP_SECURE_KEY; 546 char *value; 547 int vallen; 548 int status; 549 datum k, v; 550 551 /* Get SECURE */ 552 k.dptr = keystr; 553 k.dsize = strlen(keystr); 554 555 status = yp_match_host(client, domain, map, 556 k.dptr, k.dsize, &value, &vallen); 557 558 if (status == 0 && value != 0) { 559 v.dptr = value; 560 v.dsize = vallen; 561 562 if (v.dptr != NULL) { 563 status = ypdb_store(ldb, k, v, YPDB_INSERT); 564 if (status >= 0) 565 status = YPPUSH_SUCC; 566 else 567 status = YPPUSH_DBM; 568 } 569 } else { 570 status = yperr2yppush(status); 571 } 572 573 return status; 574 } 575 576 int 577 send_clear(CLIENT *client) 578 { 579 struct timeval tv; 580 int r; 581 int status; 582 583 status = YPPUSH_SUCC; 584 585 tv.tv_sec = 10; 586 tv.tv_usec = 0; 587 588 /* Send CLEAR */ 589 r = clnt_call(client, YPPROC_CLEAR, xdr_void, 0, xdr_void, 0, tv); 590 if (r != RPC_SUCCESS) { 591 clnt_perror(client, "yp_clear: clnt_call"); 592 status = YPPUSH_RPC; 593 } 594 595 return status; 596 } 597 598 int 599 send_reply(CLIENT *client, int status, int tid) 600 { 601 struct timeval tv; 602 struct ypresp_xfr resp; 603 int r; 604 605 tv.tv_sec = 10; 606 tv.tv_usec = 0; 607 608 resp.transid = tid; 609 resp.xfrstat = status; 610 611 /* Send XFRRESP */ 612 r = clnt_call(client, YPPUSHPROC_XFRRESP, xdr_ypresp_xfr, &resp, 613 xdr_void, 0, tv); 614 if (r != RPC_SUCCESS) { 615 clnt_perror(client, "yppushresp_xdr: clnt_call"); 616 status = YPPUSH_RPC; 617 } 618 619 return status; 620 } 621
Indexes created Sun Oct 12 09:09:55 GMT 2025