| File: | src/usr.sbin/ypserv/ypxfr/ypxfr.c |
| Warning: | line 255, column 5 Value stored to 'status' is never read |
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| 1 | /* $OpenBSD: ypxfr.c,v 1.39 2015/02/09 23:00:15 deraadt Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1994 Mats O Jansson <moj@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/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | #include <sys/socket.h> |
| 32 | |
| 33 | #include <netinet/in.h> |
| 34 | #include <arpa/inet.h> |
| 35 | |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <unistd.h> |
| 39 | #include <fcntl.h> |
| 40 | #include <string.h> |
| 41 | #include <netdb.h> |
| 42 | |
| 43 | #include <rpc/rpc.h> |
| 44 | #include <rpc/xdr.h> |
| 45 | #include <rpcsvc/yp.h> |
| 46 | #include <rpcsvc/ypclnt.h> |
| 47 | |
| 48 | #include "yplib_host.h" |
| 49 | #include "yplog.h" |
| 50 | #include "ypdb.h" |
| 51 | #include "ypdef.h" |
| 52 | |
| 53 | DBM *db; |
| 54 | |
| 55 | static int |
| 56 | ypxfr_foreach(u_long status, char *keystr, int keylen, char *valstr, int vallen, |
| 57 | void *data) |
| 58 | { |
| 59 | datum key, val; |
| 60 | |
| 61 | if (status == YP_NOMORE) |
| 62 | return(0); |
| 63 | |
| 64 | keystr[keylen] = '\0'; |
| 65 | valstr[vallen] = '\0'; |
| 66 | |
| 67 | key.dptr = keystr; |
| 68 | key.dsize = strlen(keystr); |
| 69 | |
| 70 | val.dptr = valstr; |
| 71 | val.dsize = strlen(valstr); |
| 72 | |
| 73 | ypdb_store(db, key, val, YPDB_INSERT0); |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static int |
| 78 | get_local_ordernum(char *domain, char *map, u_int32_t *lordernum) |
| 79 | { |
| 80 | char map_path[PATH_MAX1024], order[MAX_LAST_LEN10+1]; |
| 81 | char order_key[] = YP_LAST_KEY"YP_LAST_MODIFIED"; |
| 82 | struct stat finfo; |
| 83 | datum k, v; |
| 84 | int status; |
| 85 | DBM *db; |
| 86 | |
| 87 | /* This routine returns YPPUSH_SUCC or YPPUSH_NODOM */ |
| 88 | |
| 89 | status = YPPUSH_SUCC; |
| 90 | |
| 91 | snprintf(map_path, sizeof map_path, "%s/%s", YP_DB_PATH"/var/yp", domain); |
| 92 | if (!((stat(map_path, &finfo) == 0) && S_ISDIR(finfo.st_mode)((finfo.st_mode & 0170000) == 0040000))) { |
| 93 | fprintf(stderr(&__sF[2]), "ypxfr: domain %s not found locally\n", |
| 94 | domain); |
| 95 | status = YPPUSH_NODOM; |
| 96 | goto bail; |
| 97 | } |
| 98 | |
| 99 | snprintf(map_path, sizeof map_path, "%s/%s/%s%s", |
| 100 | YP_DB_PATH"/var/yp", domain, map, YPDB_SUFFIX".db"); |
| 101 | if (!(stat(map_path, &finfo) == 0)) { |
| 102 | status = YPPUSH_NOMAP; |
| 103 | goto bail; |
| 104 | } |
| 105 | |
| 106 | snprintf(map_path, sizeof map_path, "%s/%s/%s", |
| 107 | YP_DB_PATH"/var/yp", domain, map); |
| 108 | db = ypdb_open(map_path, O_RDONLY0x0000, 0444); |
| 109 | if (db == NULL((void *)0)) { |
| 110 | status = YPPUSH_DBM; |
| 111 | goto bail; |
| 112 | } |
| 113 | |
| 114 | k.dptr = (char *)&order_key; |
| 115 | k.dsize = YP_LAST_LEN(sizeof("YP_LAST_MODIFIED")-1); |
| 116 | |
| 117 | v = ypdb_fetch(db, k); |
| 118 | |
| 119 | if (v.dptr == NULL((void *)0)) { |
| 120 | *lordernum = 0; |
| 121 | } else { |
| 122 | strlcpy(order, v.dptr, sizeof order); |
| 123 | *lordernum = (u_int32_t)atol(order); |
| 124 | } |
| 125 | |
| 126 | ypdb_close(db); |
| 127 | bail: |
| 128 | if (status == YPPUSH_NOMAP || status == YPPUSH_DBM) { |
| 129 | *lordernum = 0; |
| 130 | status = YPPUSH_SUCC; |
| 131 | } |
| 132 | return (status); |
| 133 | |
| 134 | } |
| 135 | |
| 136 | static int |
| 137 | get_remote_ordernum(CLIENT *client, char *domain, char *map, |
| 138 | u_int32_t lordernum, u_int32_t *rordernum) |
| 139 | { |
| 140 | int status; |
| 141 | |
| 142 | status = yp_order_host(client, domain, map, rordernum); |
| 143 | |
| 144 | if (status == 0) { |
| 145 | if (*rordernum <= lordernum) |
| 146 | status = YPPUSH_AGE; |
| 147 | else |
| 148 | status = YPPUSH_SUCC; |
| 149 | } |
| 150 | return status; |
| 151 | } |
| 152 | |
| 153 | static int |
| 154 | get_map(CLIENT *client, char *domain, char *map, |
| 155 | struct ypall_callback *incallback) |
| 156 | { |
| 157 | int status; |
| 158 | |
| 159 | status = yp_all_host(client, domain, map, incallback); |
| 160 | if (status == 0 || status == YPERR_NOMORE8) |
| 161 | status = YPPUSH_SUCC; |
| 162 | else |
| 163 | status = YPPUSH_YPERR; |
| 164 | return (status); |
| 165 | } |
| 166 | |
| 167 | static DBM * |
| 168 | create_db(char *domain, char *map, char *temp_map) |
| 169 | { |
| 170 | return ypdb_open_suf(temp_map, O_RDWR0x0002, 0444); |
| 171 | } |
| 172 | |
| 173 | static int |
| 174 | install_db(char *domain, char *map, char *temp_map) |
| 175 | { |
| 176 | char db_name[PATH_MAX1024]; |
| 177 | |
| 178 | snprintf(db_name, sizeof db_name, "%s/%s/%s%s", |
| 179 | YP_DB_PATH"/var/yp", domain, map, YPDB_SUFFIX".db"); |
| 180 | rename(temp_map, db_name); |
| 181 | return YPPUSH_SUCC; |
| 182 | } |
| 183 | |
| 184 | static int |
| 185 | add_order(DBM *db, u_int32_t ordernum) |
| 186 | { |
| 187 | char datestr[11]; |
| 188 | datum key, val; |
| 189 | char keystr[] = YP_LAST_KEY"YP_LAST_MODIFIED"; |
| 190 | int status; |
| 191 | |
| 192 | snprintf(datestr, sizeof datestr, "%010u", ordernum); |
| 193 | |
| 194 | key.dptr = keystr; |
| 195 | key.dsize = strlen(keystr); |
| 196 | |
| 197 | val.dptr = datestr; |
| 198 | val.dsize = strlen(datestr); |
| 199 | |
| 200 | status = ypdb_store(db, key, val, YPDB_INSERT0); |
| 201 | if (status >= 0) |
| 202 | status = YPPUSH_SUCC; |
| 203 | else |
| 204 | status = YPPUSH_DBM; |
| 205 | return (status); |
| 206 | } |
| 207 | |
| 208 | static int |
| 209 | add_master(CLIENT *client, char *domain, char *map, DBM *db) |
| 210 | { |
| 211 | char keystr[] = YP_MASTER_KEY"YP_MASTER_NAME", *master = NULL((void *)0); |
| 212 | datum key, val; |
| 213 | int status; |
| 214 | |
| 215 | /* Get MASTER */ |
| 216 | status = yp_master_host(client, domain, map, &master); |
| 217 | |
| 218 | if (master != NULL((void *)0)) { |
| 219 | key.dptr = keystr; |
| 220 | key.dsize = strlen(keystr); |
| 221 | |
| 222 | val.dptr = master; |
| 223 | val.dsize = strlen(master); |
| 224 | |
| 225 | status = ypdb_store(db, key, val, YPDB_INSERT0); |
| 226 | if (status >= 0) |
| 227 | status = YPPUSH_SUCC; |
| 228 | else |
| 229 | status = YPPUSH_DBM; |
| 230 | } |
| 231 | return (status); |
| 232 | } |
| 233 | |
| 234 | static int |
| 235 | add_interdomain(CLIENT *client, char *domain, char *map, DBM *db) |
| 236 | { |
| 237 | char keystr[] = YP_INTERDOMAIN_KEY"YP_INTERDOMAIN", *value; |
| 238 | int vallen, status; |
| 239 | datum k, v; |
| 240 | |
| 241 | /* Get INTERDOMAIN */ |
| 242 | |
| 243 | k.dptr = keystr; |
| 244 | k.dsize = strlen(keystr); |
| 245 | |
| 246 | status = yp_match_host(client, domain, map, |
| 247 | k.dptr, k.dsize, &value, &vallen); |
| 248 | if (status == 0 && value) { |
| 249 | v.dptr = value; |
| 250 | v.dsize = vallen; |
| 251 | |
| 252 | if (v.dptr != NULL((void *)0)) { |
| 253 | status = ypdb_store(db, k, v, YPDB_INSERT0); |
| 254 | if (status >= 0) |
| 255 | status = YPPUSH_SUCC; |
Value stored to 'status' is never read | |
| 256 | else |
| 257 | status = YPPUSH_DBM; |
| 258 | } |
| 259 | } |
| 260 | return 1; |
| 261 | } |
| 262 | |
| 263 | static int |
| 264 | add_secure(CLIENT *client, char *domain, char *map, DBM *db) |
| 265 | { |
| 266 | char keystr[] = YP_SECURE_KEY"YP_SECURE", *value; |
| 267 | int vallen, status; |
| 268 | datum k, v; |
| 269 | |
| 270 | /* Get SECURE */ |
| 271 | |
| 272 | k.dptr = keystr; |
| 273 | k.dsize = strlen(keystr); |
| 274 | |
| 275 | status = yp_match_host(client, domain, map, |
| 276 | k.dptr, k.dsize, &value, &vallen); |
| 277 | if (status == 0 && value) { |
| 278 | v.dptr = value; |
| 279 | v.dsize = vallen; |
| 280 | |
| 281 | if (v.dptr != NULL((void *)0)) { |
| 282 | status = ypdb_store(db, k, v, YPDB_INSERT0); |
| 283 | if (status >= 0) |
| 284 | status = YPPUSH_SUCC; |
| 285 | else |
| 286 | status = YPPUSH_DBM; |
| 287 | } |
| 288 | } |
| 289 | return status; |
| 290 | } |
| 291 | |
| 292 | static int |
| 293 | send_clear(CLIENT *client) |
| 294 | { |
| 295 | struct timeval tv; |
| 296 | int status, r; |
| 297 | |
| 298 | status = YPPUSH_SUCC; |
| 299 | |
| 300 | tv.tv_sec = 10; |
| 301 | tv.tv_usec = 0; |
| 302 | |
| 303 | /* Send CLEAR */ |
| 304 | r = clnt_call(client, YPPROC_CLEAR, xdr_void, 0, xdr_void, 0, tv)((*(client)->cl_ops->cl_call)(client, ((u_long)7), xdr_void , (caddr_t)0, xdr_void, (caddr_t)0, tv)); |
| 305 | if (r != RPC_SUCCESS) |
| 306 | clnt_perror(client, "yp_clear: clnt_call"); |
| 307 | return status; |
| 308 | |
| 309 | } |
| 310 | |
| 311 | static int |
| 312 | send_reply(CLIENT *client, u_long status, u_long tid) |
| 313 | { |
| 314 | struct ypresp_xfr resp; |
| 315 | struct timeval tv; |
| 316 | int r; |
| 317 | |
| 318 | tv.tv_sec = 10; |
| 319 | tv.tv_usec = 0; |
| 320 | |
| 321 | resp.transid = tid; |
| 322 | resp.xfrstat = status; |
| 323 | |
| 324 | /* Send CLEAR */ |
| 325 | r = clnt_call(client, 1, xdr_ypresp_xfr, &resp, xdr_void, 0, tv)((*(client)->cl_ops->cl_call)(client, 1, xdr_ypresp_xfr , (caddr_t)&resp, xdr_void, (caddr_t)0, tv)); |
| 326 | if (r != RPC_SUCCESS) |
| 327 | clnt_perror(client, "yppushresp_xdr: clnt_call"); |
| 328 | return status; |
| 329 | |
| 330 | } |
| 331 | |
| 332 | static void |
| 333 | usage(void) |
| 334 | { |
| 335 | fprintf(stderr(&__sF[2]), |
| 336 | "usage: ypxfr [-cf] [-C tid prog ipadd port] [-d domain] " |
| 337 | "[-h host] [-s domain]\n" |
| 338 | " mapname\n"); |
| 339 | exit(1); |
| 340 | } |
| 341 | |
| 342 | int |
| 343 | main(int argc, char *argv[]) |
| 344 | { |
| 345 | int cflag = 0, fflag = 0, Cflag = 0; |
| 346 | char *domain, *host = NULL((void *)0), *srcdomain = NULL((void *)0); |
| 347 | char *tid = NULL((void *)0), *prog = NULL((void *)0), *ipadd = NULL((void *)0); |
| 348 | char *port = NULL((void *)0), *map = NULL((void *)0); |
| 349 | int status, xfr_status, ch, srvport; |
| 350 | u_int32_t ordernum, new_ordernum; |
| 351 | struct ypall_callback callback; |
| 352 | CLIENT *client = NULL((void *)0); |
| 353 | extern char *optarg; |
| 354 | |
| 355 | yp_get_default_domain(&domain); |
| 356 | |
| 357 | while ((ch = getopt(argc, argv, "cd:fh:s:C:")) != -1) |
| 358 | switch (ch) { |
| 359 | case 'c': |
| 360 | cflag = 1; |
| 361 | break; |
| 362 | case 'd': |
| 363 | if (strchr(optarg, '/')) /* Ha ha, we are not listening */ |
| 364 | break; |
| 365 | domain = optarg; |
| 366 | break; |
| 367 | case 'f': |
| 368 | fflag = 1; |
| 369 | break; |
| 370 | case 'h': |
| 371 | host = optarg; |
| 372 | break; |
| 373 | case 's': |
| 374 | if (strchr(optarg, '/')) /* Ha ha, we are not listening */ |
| 375 | break; |
| 376 | srcdomain = optarg; |
| 377 | break; |
| 378 | case 'C': |
| 379 | if (optind + 3 >= argc) |
| 380 | usage(); |
| 381 | Cflag = 1; |
| 382 | tid = optarg; |
| 383 | prog = argv[optind++]; |
| 384 | ipadd = argv[optind++]; |
| 385 | port = argv[optind++]; |
| 386 | break; |
| 387 | default: |
| 388 | usage(); |
| 389 | break; |
| 390 | } |
| 391 | |
| 392 | status = YPPUSH_SUCC; |
| 393 | |
| 394 | if (optind + 1 != argc) |
| 395 | usage(); |
| 396 | |
| 397 | map = argv[optind]; |
| 398 | |
| 399 | if (status > 0) { |
| 400 | ypopenlog(); |
| 401 | |
| 402 | yplog("ypxfr: Arguments:"); |
| 403 | yplog("YP clear to local: %s", (cflag) ? "no" : "yes"); |
| 404 | yplog(" Force transfer: %s", (fflag) ? "yes" : "no"); |
| 405 | yplog(" domain: %s", domain); |
| 406 | yplog(" host: %s", host); |
| 407 | yplog(" source domain: %s", srcdomain); |
| 408 | yplog(" transid: %s", tid); |
| 409 | yplog(" prog: %s", prog); |
| 410 | yplog(" port: %s", port); |
| 411 | yplog(" ipadd: %s", ipadd); |
| 412 | yplog(" map: %s", map); |
| 413 | |
| 414 | if (fflag != 0) { |
| 415 | ordernum = 0; |
| 416 | } else { |
| 417 | status = get_local_ordernum(domain, map, &ordernum); |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | if (status > 0) { |
| 422 | yplog("Get Master"); |
| 423 | |
| 424 | if (host == NULL((void *)0)) { |
| 425 | if (srcdomain == NULL((void *)0)) { |
| 426 | status = yp_master(domain, map, &host); |
| 427 | } else { |
| 428 | status = yp_master(srcdomain, map, &host); |
| 429 | } |
| 430 | if (status == 0) { |
| 431 | status = YPPUSH_SUCC; |
| 432 | } else { |
| 433 | status = -status; |
| 434 | } |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | /* XXX this is raceable if portmap has holes! */ |
| 439 | if (status > 0) { |
| 440 | yplog("Check for reserved port on host: %s", host); |
| 441 | |
| 442 | srvport = getrpcport(host, YPPROG((u_long)100004), YPVERS((u_long)2), IPPROTO_TCP6); |
| 443 | if (srvport >= IPPORT_RESERVED1024) |
| 444 | status = YPPUSH_REFUSED; |
| 445 | } |
| 446 | |
| 447 | if (status > 0) { |
| 448 | yplog("Connect host: %s", host); |
| 449 | |
| 450 | client = yp_bind_host(host, YPPROG((u_long)100004), YPVERS((u_long)2), 0, 1); |
| 451 | |
| 452 | status = get_remote_ordernum(client, domain, map, |
| 453 | ordernum, &new_ordernum); |
| 454 | } |
| 455 | |
| 456 | if (status == YPPUSH_SUCC) { |
| 457 | char tmpmapname[PATH_MAX1024]; |
| 458 | int fd; |
| 459 | |
| 460 | /* Create temporary db */ |
| 461 | snprintf(tmpmapname, sizeof tmpmapname, |
| 462 | "%s/%s/ypdbXXXXXXXXXX", YP_DB_PATH"/var/yp", domain); |
| 463 | fd = mkstemp(tmpmapname); |
| 464 | if (fd == -1) |
| 465 | status = YPPUSH_DBM; |
| 466 | else |
| 467 | close(fd); |
| 468 | |
| 469 | if (status > 0) { |
| 470 | db = create_db(domain, map, tmpmapname); |
| 471 | if (db == NULL((void *)0)) |
| 472 | status = YPPUSH_DBM; |
| 473 | } |
| 474 | |
| 475 | /* Add ORDER */ |
| 476 | if (status > 0) |
| 477 | status = add_order(db, new_ordernum); |
| 478 | |
| 479 | /* Add MASTER */ |
| 480 | if (status > 0) |
| 481 | status = add_master(client, domain, map, db); |
| 482 | |
| 483 | /* Add INTERDOMAIN */ |
| 484 | if (status > 0) |
| 485 | status = add_interdomain(client, domain, map, db); |
| 486 | |
| 487 | /* Add SECURE */ |
| 488 | if (status > 0) |
| 489 | status = add_secure(client, domain, map, db); |
| 490 | |
| 491 | if (status > 0) { |
| 492 | callback.foreach = ypxfr_foreach; |
| 493 | status = get_map(client, domain, map, &callback); |
| 494 | } |
| 495 | |
| 496 | /* Close db */ |
| 497 | if (db != NULL((void *)0)) |
| 498 | ypdb_close(db); |
| 499 | |
| 500 | /* Rename db */ |
| 501 | if (status > 0) { |
| 502 | status = install_db(domain, map, tmpmapname); |
| 503 | } else { |
| 504 | unlink(tmpmapname); |
| 505 | status = YPPUSH_SUCC; |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | xfr_status = status; |
| 510 | |
| 511 | if (client != NULL((void *)0)) |
| 512 | clnt_destroy(client)((*(client)->cl_ops->cl_destroy)(client)); |
| 513 | |
| 514 | /* YP_CLEAR */ |
| 515 | |
| 516 | if (!cflag) { |
| 517 | client = yp_bind_local(YPPROG((u_long)100004), YPVERS((u_long)2)); |
| 518 | status = send_clear(client); |
| 519 | clnt_destroy(client)((*(client)->cl_ops->cl_destroy)(client)); |
| 520 | } |
| 521 | |
| 522 | if (Cflag > 0) { |
| 523 | /* Send Response */ |
| 524 | client = yp_bind_host(ipadd, atoi(prog), 1, atoi(port), 0); |
| 525 | status = send_reply(client, xfr_status, atoi(tid)); |
| 526 | clnt_destroy(client)((*(client)->cl_ops->cl_destroy)(client)); |
| 527 | } |
| 528 | return (0); |
| 529 | } |