1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca> 5 * Copyright (c) 1998 Bill Paul <wpaul@ctr.columbia.edu> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote 17 * products derived from this software without specific prior written 18 * permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 21 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "namespace.h" 37 #include "reentrant.h" 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <sys/file.h> 41 #include <sys/uio.h> 42 #include <arpa/inet.h> 43 #include <errno.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <stdlib.h> 47 #include <unistd.h> 48 #include <rpc/rpc.h> 49 #include <rpc/xdr.h> 50 #include <rpcsvc/yp.h> 51 #include "un-namespace.h" 52 #include "libc_private.h" 53 54 /* 55 * We have to define these here due to clashes between yp_prot.h and 56 * yp.h. 57 */ 58 59 #define YPMATCHCACHE 60 61 #ifdef YPMATCHCACHE 62 struct ypmatch_ent { 63 char *ypc_map; 64 keydat ypc_key; 65 valdat ypc_val; 66 time_t ypc_expire_t; 67 struct ypmatch_ent *ypc_next; 68 }; 69 #define YPLIB_MAXCACHE 5 /* At most 5 entries */ 70 #define YPLIB_EXPIRE 5 /* Expire after 5 seconds */ 71 #endif 72 73 struct dom_binding { 74 struct dom_binding *dom_pnext; 75 char dom_domain[YPMAXDOMAIN + 1]; 76 struct sockaddr_in dom_server_addr; 77 u_short dom_server_port; 78 int dom_socket; 79 CLIENT *dom_client; 80 u_short dom_local_port; /* now I finally know what this is for. */ 81 long dom_vers; 82 #ifdef YPMATCHCACHE 83 struct ypmatch_ent *cache; 84 int ypmatch_cachecnt; 85 #endif 86 }; 87 88 #include <rpcsvc/ypclnt.h> 89 90 #ifndef BINDINGDIR 91 #define BINDINGDIR "/var/yp/binding" 92 #endif 93 #define MAX_RETRIES 20 94 95 bool_t xdr_ypresp_all_seq(XDR *xdrs, u_long *objp); 96 97 int (*ypresp_allfn)(); 98 void *ypresp_data; 99 100 static void _yp_unbind(struct dom_binding *); 101 struct dom_binding *_ypbindlist; 102 static char _yp_domain[MAXHOSTNAMELEN]; 103 int _yplib_timeout = 20; 104 105 static mutex_t _ypmutex = MUTEX_INITIALIZER; 106 #define YPLOCK() mutex_lock(&_ypmutex); 107 #define YPUNLOCK() mutex_unlock(&_ypmutex); 108 109 #ifdef YPMATCHCACHE 110 static void 111 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev, 112 struct ypmatch_ent *cur) 113 { 114 if (prev == NULL) 115 ypdb->cache = cur->ypc_next; 116 else 117 prev->ypc_next = cur->ypc_next; 118 119 free(cur->ypc_map); 120 free(cur->ypc_key.keydat_val); 121 free(cur->ypc_val.valdat_val); 122 free(cur); 123 124 ypdb->ypmatch_cachecnt--; 125 126 return; 127 } 128 129 static void 130 ypmatch_cache_flush(struct dom_binding *ypdb) 131 { 132 struct ypmatch_ent *n, *c = ypdb->cache; 133 134 while (c != NULL) { 135 n = c->ypc_next; 136 ypmatch_cache_delete(ypdb, NULL, c); 137 c = n; 138 } 139 140 return; 141 } 142 143 static void 144 ypmatch_cache_expire(struct dom_binding *ypdb) 145 { 146 struct ypmatch_ent *c = ypdb->cache; 147 struct ypmatch_ent *n, *p = NULL; 148 time_t t; 149 150 time(&t); 151 152 while (c != NULL) { 153 if (t >= c->ypc_expire_t) { 154 n = c->ypc_next; 155 ypmatch_cache_delete(ypdb, p, c); 156 c = n; 157 } else { 158 p = c; 159 c = c->ypc_next; 160 } 161 } 162 163 return; 164 } 165 166 static void 167 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key, 168 valdat *val) 169 { 170 struct ypmatch_ent *new; 171 172 /* Do an expire run to maybe open up a slot. */ 173 if (ypdb->ypmatch_cachecnt) 174 ypmatch_cache_expire(ypdb); 175 176 /* 177 * If there are no slots free, then force an expire of 178 * the least recently used entry. 179 */ 180 if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) { 181 struct ypmatch_ent *o = NULL, *c = ypdb->cache; 182 time_t oldest = 0; 183 184 oldest = ~oldest; 185 186 while (c != NULL) { 187 if (c->ypc_expire_t < oldest) { 188 oldest = c->ypc_expire_t; 189 o = c; 190 } 191 c = c->ypc_next; 192 } 193 194 if (o == NULL) 195 return; 196 o->ypc_expire_t = 0; 197 ypmatch_cache_expire(ypdb); 198 } 199 200 new = malloc(sizeof(struct ypmatch_ent)); 201 if (new == NULL) 202 return; 203 204 new->ypc_map = strdup(map); 205 if (new->ypc_map == NULL) { 206 free(new); 207 return; 208 } 209 new->ypc_key.keydat_val = malloc(key->keydat_len); 210 if (new->ypc_key.keydat_val == NULL) { 211 free(new->ypc_map); 212 free(new); 213 return; 214 } 215 new->ypc_val.valdat_val = malloc(val->valdat_len); 216 if (new->ypc_val.valdat_val == NULL) { 217 free(new->ypc_val.valdat_val); 218 free(new->ypc_map); 219 free(new); 220 return; 221 } 222 223 new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE; 224 new->ypc_key.keydat_len = key->keydat_len; 225 new->ypc_val.valdat_len = val->valdat_len; 226 bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len); 227 bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len); 228 229 new->ypc_next = ypdb->cache; 230 ypdb->cache = new; 231 232 ypdb->ypmatch_cachecnt++; 233 234 return; 235 } 236 237 static bool_t 238 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key, 239 valdat *val) 240 { 241 struct ypmatch_ent *c; 242 243 ypmatch_cache_expire(ypdb); 244 245 for (c = ypdb->cache; c != NULL; c = c->ypc_next) { 246 if (strcmp(map, c->ypc_map)) 247 continue; 248 if (key->keydat_len != c->ypc_key.keydat_len) 249 continue; 250 if (bcmp(key->keydat_val, c->ypc_key.keydat_val, 251 key->keydat_len)) 252 continue; 253 } 254 255 if (c == NULL) 256 return(FALSE); 257 258 val->valdat_len = c->ypc_val.valdat_len; 259 val->valdat_val = c->ypc_val.valdat_val; 260 261 return(TRUE); 262 } 263 #endif 264 265 const char * 266 ypbinderr_string(int incode) 267 { 268 static char err[80]; 269 switch (incode) { 270 case 0: 271 return ("Success"); 272 case YPBIND_ERR_ERR: 273 return ("Internal ypbind error"); 274 case YPBIND_ERR_NOSERV: 275 return ("Domain not bound"); 276 case YPBIND_ERR_RESC: 277 return ("System resource allocation failure"); 278 } 279 sprintf(err, "Unknown ypbind error: #%d\n", incode); 280 return (err); 281 } 282 283 int 284 _yp_dobind(char *dom, struct dom_binding **ypdb) 285 { 286 static pid_t pid = -1; 287 char path[MAXPATHLEN]; 288 struct dom_binding *ysd, *ysd2; 289 struct ypbind_resp ypbr; 290 struct timeval tv; 291 struct sockaddr_in clnt_sin; 292 int clnt_sock, fd; 293 pid_t gpid; 294 CLIENT *client; 295 int new = 0, r; 296 int retries = 0; 297 struct sockaddr_in check; 298 socklen_t checklen = sizeof(struct sockaddr_in); 299 300 /* Not allowed; bad doggie. Bad. */ 301 if (strchr(dom, '/') != NULL) 302 return(YPERR_BADARGS); 303 304 gpid = getpid(); 305 if (!(pid == -1 || pid == gpid)) { 306 ysd = _ypbindlist; 307 while (ysd) { 308 if (ysd->dom_client != NULL) 309 _yp_unbind(ysd); 310 ysd2 = ysd->dom_pnext; 311 free(ysd); 312 ysd = ysd2; 313 } 314 _ypbindlist = NULL; 315 } 316 pid = gpid; 317 318 if (ypdb != NULL) 319 *ypdb = NULL; 320 321 if (dom == NULL || strlen(dom) == 0) 322 return (YPERR_BADARGS); 323 324 for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext) 325 if (strcmp(dom, ysd->dom_domain) == 0) 326 break; 327 328 329 if (ysd == NULL) { 330 ysd = (struct dom_binding *)malloc(sizeof *ysd); 331 if (ysd == NULL) 332 return (YPERR_RESRC); 333 bzero((char *)ysd, sizeof *ysd); 334 ysd->dom_socket = -1; 335 ysd->dom_vers = 0; 336 new = 1; 337 } else { 338 /* Check the socket -- may have been hosed by the caller. */ 339 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check, 340 &checklen) == -1 || check.sin_family != AF_INET || 341 check.sin_port != ysd->dom_local_port) { 342 /* Socket became bogus somehow... need to rebind. */ 343 int save, sock; 344 345 sock = ysd->dom_socket; 346 save = _dup(ysd->dom_socket); 347 if (ysd->dom_client != NULL) 348 clnt_destroy(ysd->dom_client); 349 ysd->dom_vers = 0; 350 ysd->dom_client = NULL; 351 sock = _dup2(save, sock); 352 _close(save); 353 } 354 } 355 356 again: 357 retries++; 358 if (retries > MAX_RETRIES) { 359 if (new) 360 free(ysd); 361 return(YPERR_YPBIND); 362 } 363 #ifdef BINDINGDIR 364 if (ysd->dom_vers == 0) { 365 /* 366 * We're trying to make a new binding: zorch the 367 * existing handle now (if any). 368 */ 369 if (ysd->dom_client != NULL) { 370 clnt_destroy(ysd->dom_client); 371 ysd->dom_client = NULL; 372 ysd->dom_socket = -1; 373 } 374 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2); 375 if ((fd = _open(path, O_RDONLY | O_CLOEXEC)) == -1) { 376 /* no binding file, YP is dead. */ 377 /* Try to bring it back to life. */ 378 _close(fd); 379 goto skipit; 380 } 381 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) { 382 struct iovec iov[2]; 383 struct ypbind_resp ybr; 384 u_short ypb_port; 385 386 iov[0].iov_base = (caddr_t)&ypb_port; 387 iov[0].iov_len = sizeof ypb_port; 388 iov[1].iov_base = (caddr_t)&ybr; 389 iov[1].iov_len = sizeof ybr; 390 391 r = _readv(fd, iov, 2); 392 if (r != iov[0].iov_len + iov[1].iov_len) { 393 _close(fd); 394 ysd->dom_vers = -1; 395 goto again; 396 } 397 398 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 399 ysd->dom_server_addr.sin_family = AF_INET; 400 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in); 401 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr, 402 &ysd->dom_server_addr.sin_addr.s_addr, 403 sizeof(ysd->dom_server_addr.sin_addr.s_addr)); 404 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port, 405 &ysd->dom_server_addr.sin_port, 406 sizeof(ysd->dom_server_addr.sin_port)); 407 408 ysd->dom_server_port = ysd->dom_server_addr.sin_port; 409 _close(fd); 410 goto gotit; 411 } else { 412 /* no lock on binding file, YP is dead. */ 413 /* Try to bring it back to life. */ 414 _close(fd); 415 goto skipit; 416 } 417 } 418 skipit: 419 #endif 420 if (ysd->dom_vers == -1 || ysd->dom_vers == 0) { 421 /* 422 * We're trying to make a new binding: zorch the 423 * existing handle now (if any). 424 */ 425 if (ysd->dom_client != NULL) { 426 clnt_destroy(ysd->dom_client); 427 ysd->dom_client = NULL; 428 ysd->dom_socket = -1; 429 } 430 bzero((char *)&clnt_sin, sizeof clnt_sin); 431 clnt_sin.sin_family = AF_INET; 432 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 433 434 clnt_sock = RPC_ANYSOCK; 435 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock, 436 0, 0); 437 if (client == NULL) { 438 /* 439 * These conditions indicate ypbind just isn't 440 * alive -- we probably don't want to shoot our 441 * mouth off in this case; instead generate error 442 * messages only for really exotic problems. 443 */ 444 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED && 445 (rpc_createerr.cf_stat != RPC_SYSTEMERROR && 446 rpc_createerr.cf_error.re_errno == ECONNREFUSED)) 447 clnt_pcreateerror("clnttcp_create"); 448 if (new) 449 free(ysd); 450 return (YPERR_YPBIND); 451 } 452 453 /* 454 * Check the port number -- should be < IPPORT_RESERVED. 455 * If not, it's possible someone has registered a bogus 456 * ypbind with the portmapper and is trying to trick us. 457 */ 458 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) { 459 if (client != NULL) 460 clnt_destroy(client); 461 if (new) 462 free(ysd); 463 return(YPERR_YPBIND); 464 } 465 tv.tv_sec = _yplib_timeout/2; 466 tv.tv_usec = 0; 467 r = clnt_call(client, YPBINDPROC_DOMAIN, 468 (xdrproc_t)xdr_domainname, &dom, 469 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv); 470 if (r != RPC_SUCCESS) { 471 clnt_destroy(client); 472 ysd->dom_vers = -1; 473 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) { 474 if (new) 475 free(ysd); 476 return(YPERR_YPBIND); 477 } 478 fprintf(stderr, 479 "YP: server for domain %s not responding, retrying\n", dom); 480 goto again; 481 } else { 482 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 483 struct timespec time_to_sleep, time_remaining; 484 485 clnt_destroy(client); 486 ysd->dom_vers = -1; 487 488 time_to_sleep.tv_sec = _yplib_timeout/2; 489 time_to_sleep.tv_nsec = 0; 490 _nanosleep(&time_to_sleep, 491 &time_remaining); 492 goto again; 493 } 494 } 495 clnt_destroy(client); 496 497 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 498 ysd->dom_server_addr.sin_family = AF_INET; 499 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port, 500 &ysd->dom_server_addr.sin_port, 501 sizeof(ysd->dom_server_addr.sin_port)); 502 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr, 503 &ysd->dom_server_addr.sin_addr.s_addr, 504 sizeof(ysd->dom_server_addr.sin_addr.s_addr)); 505 506 /* 507 * We could do a reserved port check here too, but this 508 * could pose compatibility problems. The local ypbind is 509 * supposed to decide whether or not to trust yp servers 510 * on insecure ports. For now, we trust its judgement. 511 */ 512 ysd->dom_server_port = 513 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 514 gotit: 515 ysd->dom_vers = YPVERS; 516 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain)); 517 } 518 519 /* Don't rebuild the connection to the server unless we have to. */ 520 if (ysd->dom_client == NULL) { 521 tv.tv_sec = _yplib_timeout/2; 522 tv.tv_usec = 0; 523 ysd->dom_socket = RPC_ANYSOCK; 524 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr, 525 YPPROG, YPVERS, tv, &ysd->dom_socket, 65507, 65507); 526 if (ysd->dom_client == NULL) { 527 clnt_pcreateerror("clntudp_create"); 528 ysd->dom_vers = -1; 529 goto again; 530 } 531 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1) 532 perror("fcntl: F_SETFD"); 533 /* 534 * We want a port number associated with this socket 535 * so that we can check its authenticity later. 536 */ 537 checklen = sizeof(struct sockaddr_in); 538 bzero((char *)&check, checklen); 539 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen); 540 check.sin_family = AF_INET; 541 if (!_getsockname(ysd->dom_socket, 542 (struct sockaddr *)&check, &checklen)) { 543 ysd->dom_local_port = check.sin_port; 544 } else { 545 clnt_destroy(ysd->dom_client); 546 if (new) 547 free(ysd); 548 return(YPERR_YPBIND); 549 } 550 } 551 552 if (new) { 553 ysd->dom_pnext = _ypbindlist; 554 _ypbindlist = ysd; 555 } 556 557 /* 558 * Set low retry timeout to realistically handle UDP packet 559 * loss for YP packet bursts. 560 */ 561 tv.tv_sec = 1; 562 tv.tv_usec = 0; 563 clnt_control(ysd->dom_client, CLSET_RETRY_TIMEOUT, (char*)&tv); 564 565 if (ypdb != NULL) 566 *ypdb = ysd; 567 return (0); 568 } 569 570 static void 571 _yp_unbind(struct dom_binding *ypb) 572 { 573 struct sockaddr_in check; 574 socklen_t checklen = sizeof(struct sockaddr_in); 575 576 if (ypb->dom_client != NULL) { 577 /* Check the socket -- may have been hosed by the caller. */ 578 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check, 579 &checklen) == -1 || check.sin_family != AF_INET || 580 check.sin_port != ypb->dom_local_port) { 581 int save, sock; 582 583 sock = ypb->dom_socket; 584 save = _dup(ypb->dom_socket); 585 clnt_destroy(ypb->dom_client); 586 sock = _dup2(save, sock); 587 _close(save); 588 } else 589 clnt_destroy(ypb->dom_client); 590 } 591 592 ypb->dom_client = NULL; 593 ypb->dom_socket = -1; 594 ypb->dom_vers = -1; 595 #ifdef YPMATCHCACHE 596 ypmatch_cache_flush(ypb); 597 #endif 598 } 599 600 static int 601 yp_bind_locked(char *dom) 602 { 603 return (_yp_dobind(dom, NULL)); 604 } 605 606 int 607 yp_bind(char *dom) 608 { 609 int r; 610 611 YPLOCK(); 612 r = yp_bind_locked(dom); 613 YPUNLOCK(); 614 return (r); 615 } 616 617 static void 618 yp_unbind_locked(char *dom) 619 { 620 struct dom_binding *ypb, *ypbp; 621 622 ypbp = NULL; 623 for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) { 624 if (strcmp(dom, ypb->dom_domain) == 0) { 625 _yp_unbind(ypb); 626 if (ypbp) 627 ypbp->dom_pnext = ypb->dom_pnext; 628 else 629 _ypbindlist = ypb->dom_pnext; 630 free(ypb); 631 return; 632 } 633 ypbp = ypb; 634 } 635 return; 636 } 637 638 void 639 yp_unbind(char *dom) 640 { 641 YPLOCK(); 642 yp_unbind_locked(dom); 643 YPUNLOCK(); 644 } 645 646 int 647 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen, 648 char **outval, int *outvallen) 649 { 650 struct dom_binding *ysd; 651 struct ypresp_val yprv; 652 struct timeval tv; 653 struct ypreq_key yprk; 654 int r; 655 int retries = 0; 656 *outval = NULL; 657 *outvallen = 0; 658 659 /* Sanity check */ 660 661 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 662 inmap == NULL || !strlen(inmap) || 663 indomain == NULL || !strlen(indomain)) 664 return (YPERR_BADARGS); 665 666 YPLOCK(); 667 if (_yp_dobind(indomain, &ysd) != 0) { 668 YPUNLOCK(); 669 return(YPERR_DOMAIN); 670 } 671 672 yprk.domain = indomain; 673 yprk.map = inmap; 674 yprk.key.keydat_val = (char *)inkey; 675 yprk.key.keydat_len = inkeylen; 676 677 #ifdef YPMATCHCACHE 678 if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) { 679 /* 680 if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey, 681 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) { 682 */ 683 *outvallen = yprv.val.valdat_len; 684 *outval = (char *)malloc(*outvallen+1); 685 if (*outval == NULL) { 686 _yp_unbind(ysd); 687 *outvallen = 0; 688 YPUNLOCK(); 689 return (YPERR_RESRC); 690 } 691 bcopy(yprv.val.valdat_val, *outval, *outvallen); 692 (*outval)[*outvallen] = '\0'; 693 YPUNLOCK(); 694 return (0); 695 } 696 _yp_unbind(ysd); 697 #endif 698 699 again: 700 if (retries > MAX_RETRIES) { 701 YPUNLOCK(); 702 return (YPERR_RPC); 703 } 704 705 if (_yp_dobind(indomain, &ysd) != 0) { 706 YPUNLOCK(); 707 return (YPERR_DOMAIN); 708 } 709 710 tv.tv_sec = _yplib_timeout; 711 tv.tv_usec = 0; 712 713 bzero((char *)&yprv, sizeof yprv); 714 715 r = clnt_call(ysd->dom_client, YPPROC_MATCH, 716 (xdrproc_t)xdr_ypreq_key, &yprk, 717 (xdrproc_t)xdr_ypresp_val, &yprv, tv); 718 if (r != RPC_SUCCESS) { 719 clnt_perror(ysd->dom_client, "yp_match: clnt_call"); 720 _yp_unbind(ysd); 721 retries++; 722 goto again; 723 } 724 725 if (!(r = ypprot_err(yprv.stat))) { 726 *outvallen = yprv.val.valdat_len; 727 *outval = (char *)malloc(*outvallen+1); 728 if (*outval == NULL) { 729 _yp_unbind(ysd); 730 *outvallen = 0; 731 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv); 732 YPUNLOCK(); 733 return (YPERR_RESRC); 734 } 735 bcopy(yprv.val.valdat_val, *outval, *outvallen); 736 (*outval)[*outvallen] = '\0'; 737 #ifdef YPMATCHCACHE 738 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val); 739 #endif 740 } 741 742 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv); 743 YPUNLOCK(); 744 return (r); 745 } 746 747 static int 748 yp_get_default_domain_locked(char **domp) 749 { 750 *domp = NULL; 751 if (_yp_domain[0] == '\0') 752 if (getdomainname(_yp_domain, sizeof _yp_domain)) 753 return (YPERR_NODOM); 754 *domp = _yp_domain; 755 return (0); 756 } 757 758 int 759 yp_get_default_domain(char **domp) 760 { 761 int r; 762 763 YPLOCK(); 764 r = yp_get_default_domain_locked(domp); 765 YPUNLOCK(); 766 return (r); 767 } 768 769 int 770 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen, 771 char **outval, int *outvallen) 772 { 773 struct ypresp_key_val yprkv; 774 struct ypreq_nokey yprnk; 775 struct dom_binding *ysd; 776 struct timeval tv; 777 int r; 778 int retries = 0; 779 /* Sanity check */ 780 781 if (indomain == NULL || !strlen(indomain) || 782 inmap == NULL || !strlen(inmap)) 783 return (YPERR_BADARGS); 784 785 *outkey = *outval = NULL; 786 *outkeylen = *outvallen = 0; 787 788 YPLOCK(); 789 again: 790 if (retries > MAX_RETRIES) { 791 YPUNLOCK(); 792 return (YPERR_RPC); 793 } 794 795 if (_yp_dobind(indomain, &ysd) != 0) { 796 YPUNLOCK(); 797 return (YPERR_DOMAIN); 798 } 799 800 tv.tv_sec = _yplib_timeout; 801 tv.tv_usec = 0; 802 803 yprnk.domain = indomain; 804 yprnk.map = inmap; 805 bzero((char *)&yprkv, sizeof yprkv); 806 807 r = clnt_call(ysd->dom_client, YPPROC_FIRST, 808 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 809 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv); 810 if (r != RPC_SUCCESS) { 811 clnt_perror(ysd->dom_client, "yp_first: clnt_call"); 812 _yp_unbind(ysd); 813 retries++; 814 goto again; 815 } 816 if (!(r = ypprot_err(yprkv.stat))) { 817 *outkeylen = yprkv.key.keydat_len; 818 *outkey = (char *)malloc(*outkeylen+1); 819 if (*outkey == NULL) { 820 _yp_unbind(ysd); 821 *outkeylen = 0; 822 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 823 YPUNLOCK(); 824 return (YPERR_RESRC); 825 } 826 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 827 (*outkey)[*outkeylen] = '\0'; 828 *outvallen = yprkv.val.valdat_len; 829 *outval = (char *)malloc(*outvallen+1); 830 if (*outval == NULL) { 831 free(*outkey); 832 _yp_unbind(ysd); 833 *outkeylen = *outvallen = 0; 834 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 835 YPUNLOCK(); 836 return (YPERR_RESRC); 837 } 838 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 839 (*outval)[*outvallen] = '\0'; 840 } 841 842 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 843 YPUNLOCK(); 844 return (r); 845 } 846 847 int 848 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen, 849 char **outkey, int *outkeylen, char **outval, int *outvallen) 850 { 851 struct ypresp_key_val yprkv; 852 struct ypreq_key yprk; 853 struct dom_binding *ysd; 854 struct timeval tv; 855 int r; 856 int retries = 0; 857 /* Sanity check */ 858 859 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 860 inmap == NULL || !strlen(inmap) || 861 indomain == NULL || !strlen(indomain)) 862 return (YPERR_BADARGS); 863 864 *outkey = *outval = NULL; 865 *outkeylen = *outvallen = 0; 866 867 YPLOCK(); 868 again: 869 if (retries > MAX_RETRIES) { 870 YPUNLOCK(); 871 return (YPERR_RPC); 872 } 873 874 if (_yp_dobind(indomain, &ysd) != 0) { 875 YPUNLOCK(); 876 return (YPERR_DOMAIN); 877 } 878 879 tv.tv_sec = _yplib_timeout; 880 tv.tv_usec = 0; 881 882 yprk.domain = indomain; 883 yprk.map = inmap; 884 yprk.key.keydat_val = inkey; 885 yprk.key.keydat_len = inkeylen; 886 bzero((char *)&yprkv, sizeof yprkv); 887 888 r = clnt_call(ysd->dom_client, YPPROC_NEXT, 889 (xdrproc_t)xdr_ypreq_key, &yprk, 890 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv); 891 if (r != RPC_SUCCESS) { 892 clnt_perror(ysd->dom_client, "yp_next: clnt_call"); 893 _yp_unbind(ysd); 894 retries++; 895 goto again; 896 } 897 if (!(r = ypprot_err(yprkv.stat))) { 898 *outkeylen = yprkv.key.keydat_len; 899 *outkey = (char *)malloc(*outkeylen+1); 900 if (*outkey == NULL) { 901 _yp_unbind(ysd); 902 *outkeylen = 0; 903 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 904 YPUNLOCK(); 905 return (YPERR_RESRC); 906 } 907 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 908 (*outkey)[*outkeylen] = '\0'; 909 *outvallen = yprkv.val.valdat_len; 910 *outval = (char *)malloc(*outvallen+1); 911 if (*outval == NULL) { 912 free(*outkey); 913 _yp_unbind(ysd); 914 *outkeylen = *outvallen = 0; 915 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 916 YPUNLOCK(); 917 return (YPERR_RESRC); 918 } 919 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 920 (*outval)[*outvallen] = '\0'; 921 } 922 923 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 924 YPUNLOCK(); 925 return (r); 926 } 927 928 int 929 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback) 930 { 931 struct ypreq_nokey yprnk; 932 struct dom_binding *ysd; 933 struct timeval tv; 934 struct sockaddr_in clnt_sin; 935 CLIENT *clnt; 936 u_long status, savstat; 937 int clnt_sock; 938 int retries = 0; 939 /* Sanity check */ 940 941 if (indomain == NULL || !strlen(indomain) || 942 inmap == NULL || !strlen(inmap)) 943 return (YPERR_BADARGS); 944 945 YPLOCK(); 946 again: 947 if (retries > MAX_RETRIES) { 948 YPUNLOCK(); 949 return (YPERR_RPC); 950 } 951 952 if (_yp_dobind(indomain, &ysd) != 0) { 953 YPUNLOCK(); 954 return (YPERR_DOMAIN); 955 } 956 957 tv.tv_sec = _yplib_timeout; 958 tv.tv_usec = 0; 959 960 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */ 961 962 clnt_sock = RPC_ANYSOCK; 963 clnt_sin = ysd->dom_server_addr; 964 clnt_sin.sin_port = 0; 965 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0); 966 if (clnt == NULL) { 967 YPUNLOCK(); 968 printf("clnttcp_create failed\n"); 969 return (YPERR_PMAP); 970 } 971 972 yprnk.domain = indomain; 973 yprnk.map = inmap; 974 ypresp_allfn = incallback->foreach; 975 ypresp_data = (void *)incallback->data; 976 977 if (clnt_call(clnt, YPPROC_ALL, 978 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 979 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) { 980 clnt_perror(clnt, "yp_all: clnt_call"); 981 clnt_destroy(clnt); 982 _yp_unbind(ysd); 983 retries++; 984 goto again; 985 } 986 987 clnt_destroy(clnt); 988 savstat = status; 989 xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status); /* not really needed... */ 990 YPUNLOCK(); 991 if (savstat != YP_NOMORE) 992 return (ypprot_err(savstat)); 993 return (0); 994 } 995 996 int 997 yp_order(char *indomain, char *inmap, int *outorder) 998 { 999 struct dom_binding *ysd; 1000 struct ypresp_order ypro; 1001 struct ypreq_nokey yprnk; 1002 struct timeval tv; 1003 int r; 1004 1005 /* Sanity check */ 1006 1007 if (indomain == NULL || !strlen(indomain) || 1008 inmap == NULL || !strlen(inmap)) 1009 return (YPERR_BADARGS); 1010 1011 YPLOCK(); 1012 again: 1013 if (_yp_dobind(indomain, &ysd) != 0) { 1014 YPUNLOCK(); 1015 return (YPERR_DOMAIN); 1016 } 1017 1018 tv.tv_sec = _yplib_timeout; 1019 tv.tv_usec = 0; 1020 1021 yprnk.domain = indomain; 1022 yprnk.map = inmap; 1023 1024 bzero((char *)(char *)&ypro, sizeof ypro); 1025 1026 r = clnt_call(ysd->dom_client, YPPROC_ORDER, 1027 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 1028 (xdrproc_t)xdr_ypresp_order, &ypro, tv); 1029 1030 /* 1031 * NIS+ in YP compat mode doesn't support the YPPROC_ORDER 1032 * procedure. 1033 */ 1034 if (r == RPC_PROCUNAVAIL) { 1035 YPUNLOCK(); 1036 return(YPERR_YPERR); 1037 } 1038 1039 if (r != RPC_SUCCESS) { 1040 clnt_perror(ysd->dom_client, "yp_order: clnt_call"); 1041 _yp_unbind(ysd); 1042 goto again; 1043 } 1044 1045 if (!(r = ypprot_err(ypro.stat))) { 1046 *outorder = ypro.ordernum; 1047 } 1048 1049 xdr_free((xdrproc_t)xdr_ypresp_order, &ypro); 1050 YPUNLOCK(); 1051 return (r); 1052 } 1053 1054 int 1055 yp_master(char *indomain, char *inmap, char **outname) 1056 { 1057 struct dom_binding *ysd; 1058 struct ypresp_master yprm; 1059 struct ypreq_nokey yprnk; 1060 struct timeval tv; 1061 int r; 1062 1063 /* Sanity check */ 1064 1065 if (indomain == NULL || !strlen(indomain) || 1066 inmap == NULL || !strlen(inmap)) 1067 return (YPERR_BADARGS); 1068 YPLOCK(); 1069 again: 1070 if (_yp_dobind(indomain, &ysd) != 0) { 1071 YPUNLOCK(); 1072 return (YPERR_DOMAIN); 1073 } 1074 1075 tv.tv_sec = _yplib_timeout; 1076 tv.tv_usec = 0; 1077 1078 yprnk.domain = indomain; 1079 yprnk.map = inmap; 1080 1081 bzero((char *)&yprm, sizeof yprm); 1082 1083 r = clnt_call(ysd->dom_client, YPPROC_MASTER, 1084 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 1085 (xdrproc_t)xdr_ypresp_master, &yprm, tv); 1086 if (r != RPC_SUCCESS) { 1087 clnt_perror(ysd->dom_client, "yp_master: clnt_call"); 1088 _yp_unbind(ysd); 1089 goto again; 1090 } 1091 1092 if (!(r = ypprot_err(yprm.stat))) { 1093 *outname = (char *)strdup(yprm.peer); 1094 } 1095 1096 xdr_free((xdrproc_t)xdr_ypresp_master, &yprm); 1097 YPUNLOCK(); 1098 return (r); 1099 } 1100 1101 int 1102 yp_maplist(char *indomain, struct ypmaplist **outmaplist) 1103 { 1104 struct dom_binding *ysd; 1105 struct ypresp_maplist ypml; 1106 struct timeval tv; 1107 int r; 1108 1109 /* Sanity check */ 1110 1111 if (indomain == NULL || !strlen(indomain)) 1112 return (YPERR_BADARGS); 1113 1114 YPLOCK(); 1115 again: 1116 if (_yp_dobind(indomain, &ysd) != 0) { 1117 YPUNLOCK(); 1118 return (YPERR_DOMAIN); 1119 } 1120 1121 tv.tv_sec = _yplib_timeout; 1122 tv.tv_usec = 0; 1123 1124 bzero((char *)&ypml, sizeof ypml); 1125 1126 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST, 1127 (xdrproc_t)xdr_domainname, &indomain, 1128 (xdrproc_t)xdr_ypresp_maplist, &ypml,tv); 1129 if (r != RPC_SUCCESS) { 1130 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call"); 1131 _yp_unbind(ysd); 1132 goto again; 1133 } 1134 if (!(r = ypprot_err(ypml.stat))) { 1135 *outmaplist = ypml.maps; 1136 } 1137 1138 /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/ 1139 YPUNLOCK(); 1140 return (r); 1141 } 1142 1143 const char * 1144 yperr_string(int incode) 1145 { 1146 static char err[80]; 1147 1148 switch (incode) { 1149 case 0: 1150 return ("Success"); 1151 case YPERR_BADARGS: 1152 return ("Request arguments bad"); 1153 case YPERR_RPC: 1154 return ("RPC failure"); 1155 case YPERR_DOMAIN: 1156 return ("Can't bind to server which serves this domain"); 1157 case YPERR_MAP: 1158 return ("No such map in server's domain"); 1159 case YPERR_KEY: 1160 return ("No such key in map"); 1161 case YPERR_YPERR: 1162 return ("YP server error"); 1163 case YPERR_RESRC: 1164 return ("Local resource allocation failure"); 1165 case YPERR_NOMORE: 1166 return ("No more records in map database"); 1167 case YPERR_PMAP: 1168 return ("Can't communicate with portmapper"); 1169 case YPERR_YPBIND: 1170 return ("Can't communicate with ypbind"); 1171 case YPERR_YPSERV: 1172 return ("Can't communicate with ypserv"); 1173 case YPERR_NODOM: 1174 return ("Local domain name not set"); 1175 case YPERR_BADDB: 1176 return ("Server data base is bad"); 1177 case YPERR_VERS: 1178 return ("YP server version mismatch - server can't supply service."); 1179 case YPERR_ACCESS: 1180 return ("Access violation"); 1181 case YPERR_BUSY: 1182 return ("Database is busy"); 1183 } 1184 sprintf(err, "YP unknown error %d\n", incode); 1185 return (err); 1186 } 1187 1188 int 1189 ypprot_err(unsigned int incode) 1190 { 1191 switch (incode) { 1192 case YP_TRUE: 1193 return (0); 1194 case YP_FALSE: 1195 return (YPERR_YPBIND); 1196 case YP_NOMORE: 1197 return (YPERR_NOMORE); 1198 case YP_NOMAP: 1199 return (YPERR_MAP); 1200 case YP_NODOM: 1201 return (YPERR_DOMAIN); 1202 case YP_NOKEY: 1203 return (YPERR_KEY); 1204 case YP_BADOP: 1205 return (YPERR_YPERR); 1206 case YP_BADDB: 1207 return (YPERR_BADDB); 1208 case YP_YPERR: 1209 return (YPERR_YPERR); 1210 case YP_BADARGS: 1211 return (YPERR_BADARGS); 1212 case YP_VERS: 1213 return (YPERR_VERS); 1214 } 1215 return (YPERR_YPERR); 1216 } 1217 1218 int 1219 _yp_check(char **dom) 1220 { 1221 char *unused; 1222 1223 YPLOCK(); 1224 if (_yp_domain[0]=='\0') 1225 if (yp_get_default_domain_locked(&unused)) { 1226 YPUNLOCK(); 1227 return (0); 1228 } 1229 1230 if (dom) 1231 *dom = _yp_domain; 1232 1233 if (yp_bind_locked(_yp_domain) == 0) { 1234 yp_unbind_locked(_yp_domain); 1235 YPUNLOCK(); 1236 return (1); 1237 } 1238 YPUNLOCK(); 1239 return (0); 1240 } 1241