1 /* 2 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca> 3 * Copyright (c) 1998 Bill Paul <wpaul@ctr.columbia.edu> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote 15 * products derived from this software without specific prior written 16 * permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD: src/lib/libc/yp/yplib.c,v 1.51 2007/07/24 13:06:08 simon Exp $ 31 */ 32 33 #include "namespace.h" 34 #include "reentrant.h" 35 #include <sys/param.h> 36 #include <sys/types.h> 37 #include <sys/socket.h> 38 #include <sys/file.h> 39 #include <sys/uio.h> 40 #include <arpa/inet.h> 41 #include <errno.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <rpc/rpc.h> 47 #include <rpc/xdr.h> 48 #include <rpcsvc/yp.h> 49 #include "un-namespace.h" 50 #include "libc_private.h" 51 52 bool_t xdr_ypresp_all_seq(XDR *, u_long *); 53 54 int (*ypresp_allfn)(unsigned long, char *, int, char *, int, void *); 55 56 /* 57 * We have to define these here due to clashes between yp_prot.h and 58 * yp.h. 59 */ 60 61 #define YPMATCHCACHE 62 63 #ifdef YPMATCHCACHE 64 struct ypmatch_ent { 65 char *ypc_map; 66 keydat ypc_key; 67 valdat ypc_val; 68 time_t ypc_expire_t; 69 struct ypmatch_ent *ypc_next; 70 }; 71 #define YPLIB_MAXCACHE 5 /* At most 5 entries */ 72 #define YPLIB_EXPIRE 5 /* Expire after 5 seconds */ 73 #endif 74 75 struct dom_binding { 76 struct dom_binding *dom_pnext; 77 char dom_domain[YPMAXDOMAIN + 1]; 78 struct sockaddr_in dom_server_addr; 79 u_short dom_server_port; 80 int dom_socket; 81 CLIENT *dom_client; 82 u_short dom_local_port; /* now I finally know what this is for. */ 83 long dom_vers; 84 #ifdef YPMATCHCACHE 85 struct ypmatch_ent *cache; 86 int ypmatch_cachecnt; 87 #endif 88 }; 89 90 #include <rpcsvc/yp.h> 91 #include <rpcsvc/ypclnt.h> 92 93 #ifndef BINDINGDIR 94 #define BINDINGDIR "/var/yp/binding" 95 #endif 96 #define MAX_RETRIES 20 97 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 = ypdb->cache; 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 char * 266 ypbinderr_string(int incode) 267 { 268 const char *errstr; 269 static char err[80]; 270 switch (incode) { 271 case 0: 272 errstr = "Success"; 273 break; 274 case YPBIND_ERR_ERR: 275 errstr = "Internal ypbind error"; 276 break; 277 case YPBIND_ERR_NOSERV: 278 errstr = "Domain not bound"; 279 break; 280 case YPBIND_ERR_RESC: 281 errstr = "System resource allocation failure"; 282 break; 283 default: 284 errstr = NULL; 285 break; 286 } 287 if (errstr != NULL) 288 strlcpy(err, errstr, sizeof(err)); 289 else 290 snprintf(err, sizeof(err), "Unknown ypbind error: #%d\n", incode); 291 return (err); 292 } 293 294 int 295 _yp_dobind(const char *dom, struct dom_binding **ypdb) 296 { 297 static pid_t pid = -1; 298 char path[MAXPATHLEN]; 299 struct dom_binding *ysd, *ysd2; 300 struct ypbind_resp ypbr; 301 struct timeval tv; 302 struct sockaddr_in clnt_sin; 303 int clnt_sock, fd; 304 pid_t gpid; 305 CLIENT *client; 306 int new = 0; 307 ssize_t r; 308 int retries = 0; 309 struct sockaddr_in check; 310 socklen_t checklen = sizeof(struct sockaddr_in); 311 312 /* Not allowed; bad doggie. Bad. */ 313 if (strchr(dom, '/') != NULL) 314 return(YPERR_BADARGS); 315 316 gpid = getpid(); 317 if (!(pid == -1 || pid == gpid)) { 318 ysd = _ypbindlist; 319 while (ysd) { 320 if (ysd->dom_client != NULL) 321 _yp_unbind(ysd); 322 ysd2 = ysd->dom_pnext; 323 free(ysd); 324 ysd = ysd2; 325 } 326 _ypbindlist = NULL; 327 } 328 pid = gpid; 329 330 if (ypdb != NULL) 331 *ypdb = NULL; 332 333 if (dom == NULL || strlen(dom) == 0) 334 return (YPERR_BADARGS); 335 336 for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext) 337 if (strcmp(dom, ysd->dom_domain) == 0) 338 break; 339 340 341 if (ysd == NULL) { 342 ysd = (struct dom_binding *)malloc(sizeof *ysd); 343 bzero((char *)ysd, sizeof *ysd); 344 ysd->dom_socket = -1; 345 ysd->dom_vers = 0; 346 new = 1; 347 } else { 348 /* Check the socket -- may have been hosed by the caller. */ 349 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check, 350 &checklen) == -1 || check.sin_family != AF_INET || 351 check.sin_port != ysd->dom_local_port) { 352 /* Socket became bogus somehow... need to rebind. */ 353 int save, sock; 354 355 sock = ysd->dom_socket; 356 save = _dup(ysd->dom_socket); 357 if (ysd->dom_client != NULL) 358 clnt_destroy(ysd->dom_client); 359 ysd->dom_vers = 0; 360 ysd->dom_client = NULL; 361 sock = _dup2(save, sock); 362 _close(save); 363 } 364 } 365 366 again: 367 retries++; 368 if (retries > MAX_RETRIES) { 369 if (new) 370 free(ysd); 371 return(YPERR_YPBIND); 372 } 373 #ifdef BINDINGDIR 374 if (ysd->dom_vers == 0) { 375 /* 376 * We're trying to make a new binding: zorch the 377 * existing handle now (if any). 378 */ 379 if (ysd->dom_client != NULL) { 380 clnt_destroy(ysd->dom_client); 381 ysd->dom_client = NULL; 382 ysd->dom_socket = -1; 383 } 384 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2); 385 if ((fd = _open(path, O_RDONLY | O_CLOEXEC)) == -1) { 386 /* no binding file, YP is dead. */ 387 /* Try to bring it back to life. */ 388 _close(fd); 389 goto skipit; 390 } 391 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) { 392 struct iovec iov[2]; 393 struct ypbind_resp ybr; 394 u_short ypb_port; 395 396 iov[0].iov_base = (caddr_t)&ypb_port; 397 iov[0].iov_len = sizeof ypb_port; 398 iov[1].iov_base = (caddr_t)&ybr; 399 iov[1].iov_len = sizeof ybr; 400 401 r = _readv(fd, iov, 2); 402 if (r != (ssize_t)(iov[0].iov_len + iov[1].iov_len)) { 403 _close(fd); 404 ysd->dom_vers = -1; 405 goto again; 406 } 407 408 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 409 ysd->dom_server_addr.sin_family = AF_INET; 410 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in); 411 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr, 412 &ysd->dom_server_addr.sin_addr.s_addr, 413 sizeof(ysd->dom_server_addr.sin_addr.s_addr)); 414 bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port, 415 &ysd->dom_server_addr.sin_port, 416 sizeof(ysd->dom_server_addr.sin_port)); 417 418 ysd->dom_server_port = ysd->dom_server_addr.sin_port; 419 _close(fd); 420 goto gotit; 421 } else { 422 /* no lock on binding file, YP is dead. */ 423 /* Try to bring it back to life. */ 424 _close(fd); 425 goto skipit; 426 } 427 } 428 skipit: 429 #endif 430 if (ysd->dom_vers == -1 || ysd->dom_vers == 0) { 431 /* 432 * We're trying to make a new binding: zorch the 433 * existing handle now (if any). 434 */ 435 if (ysd->dom_client != NULL) { 436 clnt_destroy(ysd->dom_client); 437 ysd->dom_client = NULL; 438 ysd->dom_socket = -1; 439 } 440 bzero((char *)&clnt_sin, sizeof clnt_sin); 441 clnt_sin.sin_family = AF_INET; 442 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 443 444 clnt_sock = RPC_ANYSOCK; 445 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock, 446 0, 0); 447 if (client == NULL) { 448 /* 449 * These conditions indicate ypbind just isn't 450 * alive -- we probably don't want to shoot our 451 * mouth off in this case; instead generate error 452 * messages only for really exotic problems. 453 */ 454 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED && 455 (rpc_createerr.cf_stat != RPC_SYSTEMERROR && 456 rpc_createerr.cf_error.re_errno == ECONNREFUSED)) 457 clnt_pcreateerror("clnttcp_create"); 458 if (new) 459 free(ysd); 460 return (YPERR_YPBIND); 461 } 462 463 /* 464 * Check the port number -- should be < IPPORT_RESERVED. 465 * If not, it's possible someone has registered a bogus 466 * ypbind with the portmapper and is trying to trick us. 467 */ 468 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) { 469 if (client != NULL) 470 clnt_destroy(client); 471 if (new) 472 free(ysd); 473 return(YPERR_YPBIND); 474 } 475 tv.tv_sec = _yplib_timeout/2; 476 tv.tv_usec = 0; 477 r = clnt_call(client, YPBINDPROC_DOMAIN, 478 (xdrproc_t)xdr_domainname, &dom, 479 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv); 480 if (r != RPC_SUCCESS) { 481 clnt_destroy(client); 482 ysd->dom_vers = -1; 483 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) { 484 if (new) 485 free(ysd); 486 return(YPERR_YPBIND); 487 } 488 fprintf(stderr, 489 "YP: server for domain %s not responding, retrying\n", dom); 490 goto again; 491 } else { 492 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 493 struct timespec time_to_sleep, time_remaining; 494 495 clnt_destroy(client); 496 ysd->dom_vers = -1; 497 498 time_to_sleep.tv_sec = _yplib_timeout/2; 499 time_to_sleep.tv_nsec = 0; 500 _nanosleep(&time_to_sleep, 501 &time_remaining); 502 goto again; 503 } 504 } 505 clnt_destroy(client); 506 507 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 508 ysd->dom_server_addr.sin_family = AF_INET; 509 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port, 510 &ysd->dom_server_addr.sin_port, 511 sizeof(ysd->dom_server_addr.sin_port)); 512 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr, 513 &ysd->dom_server_addr.sin_addr.s_addr, 514 sizeof(ysd->dom_server_addr.sin_addr.s_addr)); 515 516 /* 517 * We could do a reserved port check here too, but this 518 * could pose compatibility problems. The local ypbind is 519 * supposed to decide whether or not to trust yp servers 520 * on insecure ports. For now, we trust its judgement. 521 */ 522 ysd->dom_server_port = 523 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 524 gotit: 525 ysd->dom_vers = YPVERS; 526 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain)); 527 } 528 529 /* Don't rebuild the connection to the server unless we have to. */ 530 if (ysd->dom_client == NULL) { 531 tv.tv_sec = _yplib_timeout/2; 532 tv.tv_usec = 0; 533 ysd->dom_socket = RPC_ANYSOCK; 534 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr, 535 YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304); 536 if (ysd->dom_client == NULL) { 537 clnt_pcreateerror("clntudp_create"); 538 ysd->dom_vers = -1; 539 goto again; 540 } 541 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1) 542 perror("fcntl: F_SETFD"); 543 /* 544 * We want a port number associated with this socket 545 * so that we can check its authenticity later. 546 */ 547 checklen = sizeof(struct sockaddr_in); 548 bzero((char *)&check, checklen); 549 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen); 550 check.sin_family = AF_INET; 551 if (!_getsockname(ysd->dom_socket, 552 (struct sockaddr *)&check, &checklen)) { 553 ysd->dom_local_port = check.sin_port; 554 } else { 555 clnt_destroy(ysd->dom_client); 556 if (new) 557 free(ysd); 558 return(YPERR_YPBIND); 559 } 560 } 561 562 if (new) { 563 ysd->dom_pnext = _ypbindlist; 564 _ypbindlist = ysd; 565 } 566 567 /* 568 * Set low retry timeout to realistically handle UDP packet 569 * loss for YP packet bursts. 570 */ 571 tv.tv_sec = 1; 572 tv.tv_usec = 0; 573 clnt_control(ysd->dom_client, CLSET_RETRY_TIMEOUT, (char*)&tv); 574 575 if (ypdb != NULL) 576 *ypdb = ysd; 577 return (0); 578 } 579 580 static void 581 _yp_unbind(struct dom_binding *ypb) 582 { 583 struct sockaddr_in check; 584 socklen_t checklen = sizeof(struct sockaddr_in); 585 586 if (ypb->dom_client != NULL) { 587 /* Check the socket -- may have been hosed by the caller. */ 588 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check, 589 &checklen) == -1 || check.sin_family != AF_INET || 590 check.sin_port != ypb->dom_local_port) { 591 int save, sock; 592 593 sock = ypb->dom_socket; 594 save = _dup(ypb->dom_socket); 595 clnt_destroy(ypb->dom_client); 596 sock = _dup2(save, sock); 597 _close(save); 598 } else 599 clnt_destroy(ypb->dom_client); 600 } 601 602 ypb->dom_client = NULL; 603 ypb->dom_socket = -1; 604 ypb->dom_vers = -1; 605 #ifdef YPMATCHCACHE 606 ypmatch_cache_flush(ypb); 607 #endif 608 } 609 610 static int 611 yp_bind_locked(char *dom) 612 { 613 return (_yp_dobind(dom, NULL)); 614 } 615 616 int 617 yp_bind(char *dom) 618 { 619 int r; 620 621 YPLOCK(); 622 r = yp_bind_locked(dom); 623 YPUNLOCK(); 624 return (r); 625 } 626 627 static void 628 yp_unbind_locked(char *dom) 629 { 630 struct dom_binding *ypb, *ypbp; 631 632 ypbp = NULL; 633 for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) { 634 if (strcmp(dom, ypb->dom_domain) == 0) { 635 _yp_unbind(ypb); 636 if (ypbp) 637 ypbp->dom_pnext = ypb->dom_pnext; 638 else 639 _ypbindlist = ypb->dom_pnext; 640 free(ypb); 641 return; 642 } 643 ypbp = ypb; 644 } 645 return; 646 } 647 648 void 649 yp_unbind(char *dom) 650 { 651 YPLOCK(); 652 yp_unbind_locked(dom); 653 YPUNLOCK(); 654 } 655 656 int 657 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen, 658 char **outval, int *outvallen) 659 { 660 struct dom_binding *ysd; 661 struct ypresp_val yprv; 662 struct timeval tv; 663 struct ypreq_key yprk; 664 int r; 665 666 *outval = NULL; 667 *outvallen = 0; 668 669 /* Sanity check */ 670 671 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 672 inmap == NULL || !strlen(inmap) || 673 indomain == NULL || !strlen(indomain)) 674 return (YPERR_BADARGS); 675 676 YPLOCK(); 677 if (_yp_dobind(indomain, &ysd) != 0) { 678 YPUNLOCK(); 679 return(YPERR_DOMAIN); 680 } 681 682 yprk.domain = indomain; 683 yprk.map = inmap; 684 yprk.key.keydat_val = (char *)inkey; 685 yprk.key.keydat_len = inkeylen; 686 687 #ifdef YPMATCHCACHE 688 if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) { 689 /* 690 if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey, 691 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) { 692 */ 693 *outvallen = yprv.val.valdat_len; 694 *outval = (char *)malloc(*outvallen+1); 695 bcopy(yprv.val.valdat_val, *outval, *outvallen); 696 (*outval)[*outvallen] = '\0'; 697 YPUNLOCK(); 698 return (0); 699 } 700 #endif 701 702 again: 703 if (_yp_dobind(indomain, &ysd) != 0) { 704 YPUNLOCK(); 705 return (YPERR_DOMAIN); 706 } 707 708 tv.tv_sec = _yplib_timeout; 709 tv.tv_usec = 0; 710 711 bzero((char *)&yprv, sizeof yprv); 712 713 r = clnt_call(ysd->dom_client, YPPROC_MATCH, 714 (xdrproc_t)xdr_ypreq_key, &yprk, 715 (xdrproc_t)xdr_ypresp_val, &yprv, tv); 716 if (r != RPC_SUCCESS) { 717 clnt_perror(ysd->dom_client, "yp_match: clnt_call"); 718 _yp_unbind(ysd); 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 bcopy(yprv.val.valdat_val, *outval, *outvallen); 726 (*outval)[*outvallen] = '\0'; 727 #ifdef YPMATCHCACHE 728 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val); 729 #endif 730 } 731 732 xdr_free((xdrproc_t)xdr_ypresp_val, &yprv); 733 YPUNLOCK(); 734 return (r); 735 } 736 737 static int 738 yp_get_default_domain_locked(char **domp) 739 { 740 *domp = NULL; 741 if (_yp_domain[0] == '\0') 742 if (getdomainname(_yp_domain, sizeof _yp_domain)) 743 return (YPERR_NODOM); 744 *domp = _yp_domain; 745 return (0); 746 } 747 748 int 749 yp_get_default_domain(char **domp) 750 { 751 int r; 752 753 YPLOCK(); 754 r = yp_get_default_domain_locked(domp); 755 YPUNLOCK(); 756 return (r); 757 } 758 759 int 760 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen, 761 char **outval, int *outvallen) 762 { 763 struct ypresp_key_val yprkv; 764 struct ypreq_nokey yprnk; 765 struct dom_binding *ysd; 766 struct timeval tv; 767 int r; 768 769 /* Sanity check */ 770 771 if (indomain == NULL || !strlen(indomain) || 772 inmap == NULL || !strlen(inmap)) 773 return (YPERR_BADARGS); 774 775 *outkey = *outval = NULL; 776 *outkeylen = *outvallen = 0; 777 778 YPLOCK(); 779 again: 780 if (_yp_dobind(indomain, &ysd) != 0) { 781 YPUNLOCK(); 782 return (YPERR_DOMAIN); 783 } 784 785 tv.tv_sec = _yplib_timeout; 786 tv.tv_usec = 0; 787 788 yprnk.domain = indomain; 789 yprnk.map = inmap; 790 bzero((char *)&yprkv, sizeof yprkv); 791 792 r = clnt_call(ysd->dom_client, YPPROC_FIRST, 793 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 794 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv); 795 if (r != RPC_SUCCESS) { 796 clnt_perror(ysd->dom_client, "yp_first: clnt_call"); 797 _yp_unbind(ysd); 798 goto again; 799 } 800 if (!(r = ypprot_err(yprkv.stat))) { 801 *outkeylen = yprkv.key.keydat_len; 802 *outkey = (char *)malloc(*outkeylen+1); 803 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 804 (*outkey)[*outkeylen] = '\0'; 805 *outvallen = yprkv.val.valdat_len; 806 *outval = (char *)malloc(*outvallen+1); 807 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 808 (*outval)[*outvallen] = '\0'; 809 } 810 811 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 812 YPUNLOCK(); 813 return (r); 814 } 815 816 int 817 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen, 818 char **outkey, int *outkeylen, char **outval, int *outvallen) 819 { 820 struct ypresp_key_val yprkv; 821 struct ypreq_key yprk; 822 struct dom_binding *ysd; 823 struct timeval tv; 824 int r; 825 826 /* Sanity check */ 827 828 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 829 inmap == NULL || !strlen(inmap) || 830 indomain == NULL || !strlen(indomain)) 831 return (YPERR_BADARGS); 832 833 *outkey = *outval = NULL; 834 *outkeylen = *outvallen = 0; 835 836 YPLOCK(); 837 again: 838 if (_yp_dobind(indomain, &ysd) != 0) { 839 YPUNLOCK(); 840 return (YPERR_DOMAIN); 841 } 842 843 tv.tv_sec = _yplib_timeout; 844 tv.tv_usec = 0; 845 846 yprk.domain = indomain; 847 yprk.map = inmap; 848 yprk.key.keydat_val = inkey; 849 yprk.key.keydat_len = inkeylen; 850 bzero((char *)&yprkv, sizeof yprkv); 851 852 r = clnt_call(ysd->dom_client, YPPROC_NEXT, 853 (xdrproc_t)xdr_ypreq_key, &yprk, 854 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv); 855 if (r != RPC_SUCCESS) { 856 clnt_perror(ysd->dom_client, "yp_next: clnt_call"); 857 _yp_unbind(ysd); 858 goto again; 859 } 860 if (!(r = ypprot_err(yprkv.stat))) { 861 *outkeylen = yprkv.key.keydat_len; 862 *outkey = (char *)malloc(*outkeylen+1); 863 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 864 (*outkey)[*outkeylen] = '\0'; 865 *outvallen = yprkv.val.valdat_len; 866 *outval = (char *)malloc(*outvallen+1); 867 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 868 (*outval)[*outvallen] = '\0'; 869 } 870 871 xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv); 872 YPUNLOCK(); 873 return (r); 874 } 875 876 int 877 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback) 878 { 879 struct ypreq_nokey yprnk; 880 struct dom_binding *ysd; 881 struct timeval tv; 882 struct sockaddr_in clnt_sin; 883 CLIENT *clnt; 884 u_long status, savstat; 885 int clnt_sock; 886 887 /* Sanity check */ 888 889 if (indomain == NULL || !strlen(indomain) || 890 inmap == NULL || !strlen(inmap)) 891 return (YPERR_BADARGS); 892 893 YPLOCK(); 894 again: 895 896 if (_yp_dobind(indomain, &ysd) != 0) { 897 YPUNLOCK(); 898 return (YPERR_DOMAIN); 899 } 900 901 tv.tv_sec = _yplib_timeout; 902 tv.tv_usec = 0; 903 904 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */ 905 906 clnt_sock = RPC_ANYSOCK; 907 clnt_sin = ysd->dom_server_addr; 908 clnt_sin.sin_port = 0; 909 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0); 910 if (clnt == NULL) { 911 YPUNLOCK(); 912 printf("clnttcp_create failed\n"); 913 return (YPERR_PMAP); 914 } 915 916 yprnk.domain = indomain; 917 yprnk.map = inmap; 918 ypresp_allfn = incallback->foreach; 919 ypresp_data = (void *)incallback->data; 920 921 if (clnt_call(clnt, YPPROC_ALL, 922 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 923 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) { 924 clnt_perror(ysd->dom_client, "yp_all: clnt_call"); 925 clnt_destroy(clnt); 926 _yp_unbind(ysd); 927 goto again; 928 } 929 930 clnt_destroy(clnt); 931 savstat = status; 932 xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status); /* not really needed... */ 933 YPUNLOCK(); 934 if (savstat != YP_NOMORE) 935 return (ypprot_err(savstat)); 936 return (0); 937 } 938 939 int 940 yp_order(char *indomain, char *inmap, int *outorder) 941 { 942 struct dom_binding *ysd; 943 struct ypresp_order ypro; 944 struct ypreq_nokey yprnk; 945 struct timeval tv; 946 int r; 947 948 /* Sanity check */ 949 950 if (indomain == NULL || !strlen(indomain) || 951 inmap == NULL || !strlen(inmap)) 952 return (YPERR_BADARGS); 953 954 YPLOCK(); 955 again: 956 if (_yp_dobind(indomain, &ysd) != 0) { 957 YPUNLOCK(); 958 return (YPERR_DOMAIN); 959 } 960 961 tv.tv_sec = _yplib_timeout; 962 tv.tv_usec = 0; 963 964 yprnk.domain = indomain; 965 yprnk.map = inmap; 966 967 bzero((char *)(char *)&ypro, sizeof ypro); 968 969 r = clnt_call(ysd->dom_client, YPPROC_ORDER, 970 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 971 (xdrproc_t)xdr_ypresp_order, &ypro, tv); 972 973 /* 974 * NIS+ in YP compat mode doesn't support the YPPROC_ORDER 975 * procedure. 976 */ 977 if (r == RPC_PROCUNAVAIL) { 978 YPUNLOCK(); 979 return(YPERR_YPERR); 980 } 981 982 if (r != RPC_SUCCESS) { 983 clnt_perror(ysd->dom_client, "yp_order: clnt_call"); 984 _yp_unbind(ysd); 985 goto again; 986 } 987 988 if (!(r = ypprot_err(ypro.stat))) { 989 *outorder = ypro.ordernum; 990 } 991 992 xdr_free((xdrproc_t)xdr_ypresp_order, &ypro); 993 YPUNLOCK(); 994 return (r); 995 } 996 997 int 998 yp_master(char *indomain, char *inmap, char **outname) 999 { 1000 struct dom_binding *ysd; 1001 struct ypresp_master yprm; 1002 struct ypreq_nokey yprnk; 1003 struct timeval tv; 1004 int r; 1005 1006 /* Sanity check */ 1007 1008 if (indomain == NULL || !strlen(indomain) || 1009 inmap == NULL || !strlen(inmap)) 1010 return (YPERR_BADARGS); 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 *)&yprm, sizeof yprm); 1025 1026 r = clnt_call(ysd->dom_client, YPPROC_MASTER, 1027 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 1028 (xdrproc_t)xdr_ypresp_master, &yprm, tv); 1029 if (r != RPC_SUCCESS) { 1030 clnt_perror(ysd->dom_client, "yp_master: clnt_call"); 1031 _yp_unbind(ysd); 1032 goto again; 1033 } 1034 1035 if (!(r = ypprot_err(yprm.stat))) { 1036 *outname = (char *)strdup(yprm.peer); 1037 } 1038 1039 xdr_free((xdrproc_t)xdr_ypresp_master, &yprm); 1040 YPUNLOCK(); 1041 return (r); 1042 } 1043 1044 int 1045 yp_maplist(char *indomain, struct ypmaplist **outmaplist) 1046 { 1047 struct dom_binding *ysd; 1048 struct ypresp_maplist ypml; 1049 struct timeval tv; 1050 int r; 1051 1052 /* Sanity check */ 1053 1054 if (indomain == NULL || !strlen(indomain)) 1055 return (YPERR_BADARGS); 1056 1057 YPLOCK(); 1058 again: 1059 if (_yp_dobind(indomain, &ysd) != 0) { 1060 YPUNLOCK(); 1061 return (YPERR_DOMAIN); 1062 } 1063 1064 tv.tv_sec = _yplib_timeout; 1065 tv.tv_usec = 0; 1066 1067 bzero((char *)&ypml, sizeof ypml); 1068 1069 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST, 1070 (xdrproc_t)xdr_domainname, &indomain, 1071 (xdrproc_t)xdr_ypresp_maplist, &ypml, tv); 1072 if (r != RPC_SUCCESS) { 1073 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call"); 1074 _yp_unbind(ysd); 1075 goto again; 1076 } 1077 if (!(r = ypprot_err(ypml.stat))) { 1078 *outmaplist = ypml.maps; 1079 } 1080 1081 /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/ 1082 YPUNLOCK(); 1083 return (r); 1084 } 1085 1086 char * 1087 yperr_string(int incode) 1088 { 1089 const char *errstr; 1090 static char err[80]; 1091 1092 switch (incode) { 1093 case 0: 1094 errstr = "Success"; 1095 break; 1096 case YPERR_BADARGS: 1097 errstr = "Request arguments bad"; 1098 break; 1099 case YPERR_RPC: 1100 errstr = "RPC failure"; 1101 break; 1102 case YPERR_DOMAIN: 1103 errstr = "Can't bind to server which serves this domain"; 1104 break; 1105 case YPERR_MAP: 1106 errstr = "No such map in server's domain"; 1107 break; 1108 case YPERR_KEY: 1109 errstr = "No such key in map"; 1110 break; 1111 case YPERR_YPERR: 1112 errstr = "YP server error"; 1113 break; 1114 case YPERR_RESRC: 1115 errstr = "Local resource allocation failure"; 1116 break; 1117 case YPERR_NOMORE: 1118 errstr = "No more records in map database"; 1119 break; 1120 case YPERR_PMAP: 1121 errstr = "Can't communicate with portmapper"; 1122 break; 1123 case YPERR_YPBIND: 1124 errstr = "Can't communicate with ypbind"; 1125 break; 1126 case YPERR_YPSERV: 1127 errstr = "Can't communicate with ypserv"; 1128 break; 1129 case YPERR_NODOM: 1130 errstr = "Local domain name not set"; 1131 break; 1132 case YPERR_BADDB: 1133 errstr = "Server data base is bad"; 1134 break; 1135 case YPERR_VERS: 1136 errstr = "YP server version mismatch - server can't supply service."; 1137 break; 1138 case YPERR_ACCESS: 1139 errstr = "Access violation"; 1140 break; 1141 case YPERR_BUSY: 1142 errstr = "Database is busy"; 1143 break; 1144 default: 1145 errstr = NULL; 1146 break; 1147 } 1148 if (errstr != NULL) 1149 strlcpy(err, errstr, sizeof(err)); 1150 else 1151 snprintf(err, sizeof(err), "YP unknown error %d\n", incode); 1152 return (err); 1153 } 1154 1155 int 1156 ypprot_err(unsigned int incode) 1157 { 1158 switch (incode) { 1159 case YP_TRUE: 1160 return (0); 1161 case YP_FALSE: 1162 return (YPERR_YPBIND); 1163 case YP_NOMORE: 1164 return (YPERR_NOMORE); 1165 case YP_NOMAP: 1166 return (YPERR_MAP); 1167 case YP_NODOM: 1168 return (YPERR_DOMAIN); 1169 case YP_NOKEY: 1170 return (YPERR_KEY); 1171 case YP_BADOP: 1172 return (YPERR_YPERR); 1173 case YP_BADDB: 1174 return (YPERR_BADDB); 1175 case YP_YPERR: 1176 return (YPERR_YPERR); 1177 case YP_BADARGS: 1178 return (YPERR_BADARGS); 1179 case YP_VERS: 1180 return (YPERR_VERS); 1181 } 1182 return (YPERR_YPERR); 1183 } 1184 1185 int 1186 _yp_check(char **dom) 1187 { 1188 char *unused; 1189 1190 YPLOCK(); 1191 if (_yp_domain[0]=='\0') 1192 if (yp_get_default_domain_locked(&unused)) { 1193 YPUNLOCK(); 1194 return (0); 1195 } 1196 1197 if (dom) 1198 *dom = _yp_domain; 1199 1200 if (yp_bind_locked(_yp_domain) == 0) { 1201 yp_unbind_locked(_yp_domain); 1202 YPUNLOCK(); 1203 return (1); 1204 } 1205 YPUNLOCK(); 1206 return (0); 1207 } 1208