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