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 31 #ifndef LINT 32 static char *rcsid = "$Id: yplib.c,v 1.29 1997/04/10 20:26:04 wpaul Exp $"; 33 #endif 34 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 <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 49 /* 50 * We have to define these here due to clashes between yp_prot.h and 51 * yp.h. 52 */ 53 54 #define YPMATCHCACHE 55 56 #ifdef YPMATCHCACHE 57 struct ypmatch_ent { 58 char *ypc_map; 59 keydat ypc_key; 60 valdat ypc_val; 61 time_t ypc_expire_t; 62 struct ypmatch_ent *ypc_next; 63 }; 64 #define YPLIB_MAXCACHE 5 /* At most 5 entries */ 65 #define YPLIB_EXPIRE 5 /* Expire after 5 seconds */ 66 #endif 67 68 struct dom_binding { 69 struct dom_binding *dom_pnext; 70 char dom_domain[YPMAXDOMAIN + 1]; 71 struct sockaddr_in dom_server_addr; 72 u_short dom_server_port; 73 int dom_socket; 74 CLIENT *dom_client; 75 u_short dom_local_port; /* now I finally know what this is for. */ 76 long dom_vers; 77 #ifdef YPMATCHCACHE 78 struct ypmatch_ent *cache; 79 int ypmatch_cachecnt; 80 #endif 81 }; 82 83 #include <rpcsvc/ypclnt.h> 84 85 #ifndef BINDINGDIR 86 #define BINDINGDIR "/var/yp/binding" 87 #endif 88 #define MAX_RETRIES 20 89 90 extern bool_t xdr_domainname(), xdr_ypbind_resp(); 91 extern bool_t xdr_ypreq_key(), xdr_ypresp_val(); 92 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val(); 93 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq(); 94 extern bool_t xdr_ypresp_master(); 95 96 int (*ypresp_allfn)(); 97 void *ypresp_data; 98 99 static void _yp_unbind __P(( struct dom_binding * )); 100 struct dom_binding *_ypbindlist; 101 static char _yp_domain[MAXHOSTNAMELEN]; 102 int _yplib_timeout = 10; 103 104 #ifdef YPMATCHCACHE 105 static void ypmatch_cache_delete(ypdb, prev, cur) 106 struct dom_binding *ypdb; 107 struct ypmatch_ent *prev; 108 struct ypmatch_ent *cur; 109 { 110 if (prev == NULL) 111 ypdb->cache = cur->ypc_next; 112 else 113 prev->ypc_next = cur->ypc_next; 114 115 free(cur->ypc_map); 116 free(cur->ypc_key.keydat_val); 117 free(cur->ypc_val.valdat_val); 118 free(cur); 119 120 ypdb->ypmatch_cachecnt--; 121 122 return; 123 } 124 125 static void ypmatch_cache_flush(ypdb) 126 struct dom_binding *ypdb; 127 { 128 struct ypmatch_ent *n, *c = ypdb->cache; 129 130 while (c != NULL) { 131 n = c->ypc_next; 132 ypmatch_cache_delete(ypdb, NULL, c); 133 c = n; 134 } 135 136 return; 137 } 138 139 static void ypmatch_cache_expire(ypdb) 140 struct dom_binding *ypdb; 141 { 142 struct ypmatch_ent *c = ypdb->cache; 143 struct ypmatch_ent *n, *p = NULL; 144 time_t t; 145 146 time(&t); 147 148 while (c != NULL) { 149 if (t >= c->ypc_expire_t) { 150 n = c->ypc_next; 151 ypmatch_cache_delete(ypdb, p, c); 152 c = n; 153 } else { 154 p = c; 155 c = c->ypc_next; 156 } 157 } 158 159 return; 160 } 161 162 static void ypmatch_cache_insert(ypdb, map, key, val) 163 struct dom_binding *ypdb; 164 char *map; 165 keydat *key; 166 valdat *val; 167 { 168 struct ypmatch_ent *new; 169 170 /* Do an expire run to maybe open up a slot. */ 171 if (ypdb->ypmatch_cachecnt) 172 ypmatch_cache_expire(ypdb); 173 174 /* 175 * If there are no slots free, then force an expire of 176 * the least recently used entry. 177 */ 178 if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) { 179 struct ypmatch_ent *o = NULL, *c = ypdb->cache; 180 time_t oldest = 0; 181 182 oldest = ~oldest; 183 184 while(c != NULL) { 185 if (c->ypc_expire_t < oldest) { 186 oldest = c->ypc_expire_t; 187 o = c; 188 } 189 c = c->ypc_next; 190 } 191 192 if (o == NULL) 193 return; 194 o->ypc_expire_t = 0; 195 ypmatch_cache_expire(ypdb); 196 } 197 198 new = malloc(sizeof(struct ypmatch_ent)); 199 if (new == NULL) 200 return; 201 202 new->ypc_map = strdup(map); 203 if (new->ypc_map == NULL) { 204 free(new); 205 return; 206 } 207 new->ypc_key.keydat_val = malloc(key->keydat_len); 208 if (new->ypc_key.keydat_val == NULL) { 209 free(new->ypc_map); 210 free(new); 211 return; 212 } 213 new->ypc_val.valdat_val = malloc(val->valdat_len); 214 if (new->ypc_val.valdat_val == NULL) { 215 free(new->ypc_val.valdat_val); 216 free(new->ypc_map); 217 free(new); 218 return; 219 } 220 221 new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE; 222 new->ypc_key.keydat_len = key->keydat_len; 223 new->ypc_val.valdat_len = val->valdat_len; 224 bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len); 225 bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len); 226 227 new->ypc_next = ypdb->cache; 228 ypdb->cache = new; 229 230 ypdb->ypmatch_cachecnt++; 231 232 return; 233 } 234 235 static bool_t ypmatch_cache_lookup(ypdb, map, key, val) 236 struct dom_binding *ypdb; 237 char *map; 238 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(incode) 267 int incode; 268 { 269 static char err[80]; 270 switch(incode) { 271 case 0: 272 return "Success"; 273 case YPBIND_ERR_ERR: 274 return "Internal ypbind error"; 275 case YPBIND_ERR_NOSERV: 276 return "Domain not bound"; 277 case YPBIND_ERR_RESC: 278 return "System resource allocation failure"; 279 } 280 sprintf(err, "Unknown ypbind error: #%d\n", incode); 281 return err; 282 } 283 284 int 285 _yp_dobind(dom, ypdb) 286 char *dom; 287 struct dom_binding **ypdb; 288 { 289 static pid_t pid = -1; 290 char path[MAXPATHLEN]; 291 struct dom_binding *ysd, *ysd2; 292 struct ypbind_resp ypbr; 293 struct timeval tv; 294 struct sockaddr_in clnt_sin; 295 int clnt_sock, fd; 296 pid_t gpid; 297 CLIENT *client; 298 int new = 0, r; 299 int retries = 0; 300 struct sockaddr_in check; 301 int checklen = sizeof(struct sockaddr_in); 302 303 /* Not allowed; bad doggie. Bad. */ 304 if (strchr(dom, '/') != NULL) 305 return(YPERR_BADARGS); 306 307 gpid = getpid(); 308 if( !(pid==-1 || pid==gpid) ) { 309 ysd = _ypbindlist; 310 while(ysd) { 311 if(ysd->dom_client != NULL) 312 _yp_unbind(ysd); 313 ysd2 = ysd->dom_pnext; 314 free(ysd); 315 ysd = ysd2; 316 } 317 _ypbindlist = NULL; 318 } 319 pid = gpid; 320 321 if(ypdb!=NULL) 322 *ypdb = NULL; 323 324 if(dom==NULL || strlen(dom)==0) 325 return YPERR_BADARGS; 326 327 for(ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext) 328 if( strcmp(dom, ysd->dom_domain) == 0) 329 break; 330 331 332 if(ysd==NULL) { 333 ysd = (struct dom_binding *)malloc(sizeof *ysd); 334 bzero((char *)ysd, sizeof *ysd); 335 ysd->dom_socket = -1; 336 ysd->dom_vers = 0; 337 new = 1; 338 } else { 339 /* Check the socket -- may have been hosed by the caller. */ 340 if (getsockname(ysd->dom_socket, (struct sockaddr *)&check, 341 &checklen) == -1 || check.sin_family != AF_INET || 342 check.sin_port != ysd->dom_local_port) { 343 /* Socket became bogus somehow... need to rebind. */ 344 int save, sock; 345 346 sock = ysd->dom_socket; 347 save = dup(ysd->dom_socket); 348 if (ysd->dom_client != NULL) 349 clnt_destroy(ysd->dom_client); 350 ysd->dom_vers = 0; 351 ysd->dom_client = NULL; 352 sock = dup2(save, sock); 353 close(save); 354 } 355 } 356 357 again: 358 retries++; 359 if (retries > MAX_RETRIES) { 360 if (new) 361 free(ysd); 362 return(YPERR_YPBIND); 363 } 364 #ifdef BINDINGDIR 365 if(ysd->dom_vers==0) { 366 /* 367 * We're trying to make a new binding: zorch the 368 * existing handle now (if any). 369 */ 370 if(ysd->dom_client != NULL) { 371 clnt_destroy(ysd->dom_client); 372 ysd->dom_client = NULL; 373 ysd->dom_socket = -1; 374 } 375 sprintf(path, "%s/%s.%d", BINDINGDIR, dom, 2); 376 if( (fd=open(path, O_RDONLY)) == -1) { 377 /* no binding file, YP is dead. */ 378 /* Try to bring it back to life. */ 379 close(fd); 380 goto skipit; 381 } 382 if( flock(fd, LOCK_EX|LOCK_NB) == -1 && errno==EWOULDBLOCK) { 383 struct iovec iov[2]; 384 struct ypbind_resp ybr; 385 u_short ypb_port; 386 387 iov[0].iov_base = (caddr_t)&ypb_port; 388 iov[0].iov_len = sizeof ypb_port; 389 iov[1].iov_base = (caddr_t)&ybr; 390 iov[1].iov_len = sizeof ybr; 391 392 r = readv(fd, iov, 2); 393 if(r != iov[0].iov_len + iov[1].iov_len) { 394 close(fd); 395 ysd->dom_vers = -1; 396 goto again; 397 } 398 399 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 400 ysd->dom_server_addr.sin_family = AF_INET; 401 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in); 402 ysd->dom_server_addr.sin_addr.s_addr = 403 *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 404 ysd->dom_server_addr.sin_port = 405 *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 406 407 ysd->dom_server_port = ysd->dom_server_addr.sin_port; 408 close(fd); 409 goto gotit; 410 } else { 411 /* no lock on binding file, YP is dead. */ 412 /* Try to bring it back to life. */ 413 close(fd); 414 goto skipit; 415 } 416 } 417 skipit: 418 #endif 419 if(ysd->dom_vers==-1 || ysd->dom_vers==0) { 420 /* 421 * We're trying to make a new binding: zorch the 422 * existing handle now (if any). 423 */ 424 if(ysd->dom_client != NULL) { 425 clnt_destroy(ysd->dom_client); 426 ysd->dom_client = NULL; 427 ysd->dom_socket = -1; 428 } 429 bzero((char *)&clnt_sin, sizeof clnt_sin); 430 clnt_sin.sin_family = AF_INET; 431 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 432 433 clnt_sock = RPC_ANYSOCK; 434 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock, 435 0, 0); 436 if(client==NULL) { 437 /* 438 * These conditions indicate ypbind just isn't 439 * alive -- we probably don't want to shoot our 440 * mouth off in this case; instead generate error 441 * messages only for really exotic problems. 442 */ 443 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED && 444 (rpc_createerr.cf_stat != RPC_SYSTEMERROR && 445 rpc_createerr.cf_error.re_errno == ECONNREFUSED)) 446 clnt_pcreateerror("clnttcp_create"); 447 if(new) 448 free(ysd); 449 return (YPERR_YPBIND); 450 } 451 452 /* 453 * Check the port number -- should be < IPPORT_RESERVED. 454 * If not, it's possible someone has registered a bogus 455 * ypbind with the portmapper and is trying to trick us. 456 */ 457 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) { 458 if (client != NULL) 459 clnt_destroy(client); 460 if (new) 461 free(ysd); 462 return(YPERR_YPBIND); 463 } 464 tv.tv_sec = _yplib_timeout/2; 465 tv.tv_usec = 0; 466 r = clnt_call(client, YPBINDPROC_DOMAIN, 467 xdr_domainname, (char *)&dom, xdr_ypbind_resp, &ypbr, tv); 468 if(r != RPC_SUCCESS) { 469 clnt_destroy(client); 470 ysd->dom_vers = -1; 471 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) { 472 if (new) 473 free(ysd); 474 return(YPERR_YPBIND); 475 } 476 fprintf(stderr, 477 "YP: server for domain %s not responding, retrying\n", dom); 478 goto again; 479 } else { 480 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 481 clnt_destroy(client); 482 ysd->dom_vers = -1; 483 sleep(_yplib_timeout/2); 484 goto again; 485 } 486 } 487 clnt_destroy(client); 488 489 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 490 ysd->dom_server_addr.sin_family = AF_INET; 491 ysd->dom_server_addr.sin_port = 492 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 493 ysd->dom_server_addr.sin_addr.s_addr = 494 *(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 495 496 /* 497 * We could do a reserved port check here too, but this 498 * could pose compatibility problems. The local ypbind is 499 * supposed to decide whether or not to trust yp servers 500 * on insecure ports. For now, we trust its judgement. 501 */ 502 ysd->dom_server_port = 503 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 504 gotit: 505 ysd->dom_vers = YPVERS; 506 strcpy(ysd->dom_domain, dom); 507 } 508 509 /* Don't rebuild the connection to the server unless we have to. */ 510 if (ysd->dom_client == NULL) { 511 tv.tv_sec = _yplib_timeout/2; 512 tv.tv_usec = 0; 513 ysd->dom_socket = RPC_ANYSOCK; 514 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr, 515 YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304); 516 if(ysd->dom_client==NULL) { 517 clnt_pcreateerror("clntudp_create"); 518 ysd->dom_vers = -1; 519 goto again; 520 } 521 if( fcntl(ysd->dom_socket, F_SETFD, 1) == -1) 522 perror("fcntl: F_SETFD"); 523 /* 524 * We want a port number associated with this socket 525 * so that we can check its authenticity later. 526 */ 527 checklen = sizeof(struct sockaddr_in); 528 bzero((char *)&check, checklen); 529 bind(ysd->dom_socket, (struct sockaddr *)&check, checklen); 530 check.sin_family = AF_INET; 531 if (!getsockname(ysd->dom_socket, 532 (struct sockaddr *)&check, &checklen)) { 533 ysd->dom_local_port = check.sin_port; 534 } else { 535 clnt_destroy(ysd->dom_client); 536 if (new) 537 free(ysd); 538 return(YPERR_YPBIND); 539 } 540 } 541 542 if(new) { 543 ysd->dom_pnext = _ypbindlist; 544 _ypbindlist = ysd; 545 } 546 547 if(ypdb!=NULL) 548 *ypdb = ysd; 549 return 0; 550 } 551 552 static void 553 _yp_unbind(ypb) 554 struct dom_binding *ypb; 555 { 556 struct sockaddr_in check; 557 int checklen = sizeof(struct sockaddr_in); 558 559 if (ypb->dom_client != NULL) { 560 /* Check the socket -- may have been hosed by the caller. */ 561 if (getsockname(ypb->dom_socket, (struct sockaddr *)&check, 562 &checklen) == -1 || check.sin_family != AF_INET || 563 check.sin_port != ypb->dom_local_port) { 564 int save, sock; 565 566 sock = ypb->dom_socket; 567 save = dup(ypb->dom_socket); 568 clnt_destroy(ypb->dom_client); 569 sock = dup2(save, sock); 570 close(save); 571 } else 572 clnt_destroy(ypb->dom_client); 573 } 574 575 ypb->dom_client = NULL; 576 ypb->dom_socket = -1; 577 ypb->dom_vers = -1; 578 #ifdef YPMATCHCACHE 579 ypmatch_cache_flush(ypb); 580 #endif 581 } 582 583 int 584 yp_bind(dom) 585 char *dom; 586 { 587 return _yp_dobind(dom, NULL); 588 } 589 590 void 591 yp_unbind(dom) 592 char *dom; 593 { 594 struct dom_binding *ypb, *ypbp; 595 596 ypbp = NULL; 597 for(ypb=_ypbindlist; ypb; ypb=ypb->dom_pnext) { 598 if( strcmp(dom, ypb->dom_domain) == 0) { 599 _yp_unbind(ypb); 600 if(ypbp) 601 ypbp->dom_pnext = ypb->dom_pnext; 602 else 603 _ypbindlist = ypb->dom_pnext; 604 free(ypb); 605 return; 606 } 607 ypbp = ypb; 608 } 609 return; 610 } 611 612 int 613 yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen) 614 char *indomain; 615 char *inmap; 616 const char *inkey; 617 int inkeylen; 618 char **outval; 619 int *outvallen; 620 { 621 struct dom_binding *ysd; 622 struct ypresp_val yprv; 623 struct timeval tv; 624 struct ypreq_key yprk; 625 int r; 626 627 *outval = NULL; 628 *outvallen = 0; 629 630 /* Sanity check */ 631 632 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 633 inmap == NULL || !strlen(inmap) || 634 indomain == NULL || !strlen(indomain)) 635 return YPERR_BADARGS; 636 637 if (_yp_dobind(indomain, &ysd) != 0) 638 return(YPERR_DOMAIN); 639 640 yprk.domain = indomain; 641 yprk.map = inmap; 642 yprk.key.keydat_val = (char *)inkey; 643 yprk.key.keydat_len = inkeylen; 644 645 #ifdef YPMATCHCACHE 646 if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) { 647 /* 648 if( !strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey, 649 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) { 650 */ 651 *outvallen = yprv.val.valdat_len; 652 *outval = (char *)malloc(*outvallen+1); 653 bcopy(yprv.val.valdat_val, *outval, *outvallen); 654 (*outval)[*outvallen] = '\0'; 655 return 0; 656 } 657 #endif 658 659 again: 660 if( _yp_dobind(indomain, &ysd) != 0) 661 return YPERR_DOMAIN; 662 663 tv.tv_sec = _yplib_timeout; 664 tv.tv_usec = 0; 665 666 bzero((char *)&yprv, sizeof yprv); 667 668 r = clnt_call(ysd->dom_client, YPPROC_MATCH, 669 xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv); 670 if(r != RPC_SUCCESS) { 671 clnt_perror(ysd->dom_client, "yp_match: clnt_call"); 672 _yp_unbind(ysd); 673 goto again; 674 } 675 676 if( !(r=ypprot_err(yprv.stat)) ) { 677 *outvallen = yprv.val.valdat_len; 678 *outval = (char *)malloc(*outvallen+1); 679 bcopy(yprv.val.valdat_val, *outval, *outvallen); 680 (*outval)[*outvallen] = '\0'; 681 #ifdef YPMATCHCACHE 682 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val); 683 #endif 684 } 685 686 xdr_free(xdr_ypresp_val, (char *)&yprv); 687 return r; 688 } 689 690 int 691 yp_get_default_domain(domp) 692 char **domp; 693 { 694 *domp = NULL; 695 if(_yp_domain[0] == '\0') 696 if( getdomainname(_yp_domain, sizeof _yp_domain)) 697 return YPERR_NODOM; 698 *domp = _yp_domain; 699 return 0; 700 } 701 702 int 703 yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen) 704 char *indomain; 705 char *inmap; 706 char **outkey; 707 int *outkeylen; 708 char **outval; 709 int *outvallen; 710 { 711 struct ypresp_key_val yprkv; 712 struct ypreq_nokey yprnk; 713 struct dom_binding *ysd; 714 struct timeval tv; 715 int r; 716 717 /* Sanity check */ 718 719 if (indomain == NULL || !strlen(indomain) || 720 inmap == NULL || !strlen(inmap)) 721 return YPERR_BADARGS; 722 723 *outkey = *outval = NULL; 724 *outkeylen = *outvallen = 0; 725 726 again: 727 if( _yp_dobind(indomain, &ysd) != 0) 728 return YPERR_DOMAIN; 729 730 tv.tv_sec = _yplib_timeout; 731 tv.tv_usec = 0; 732 733 yprnk.domain = indomain; 734 yprnk.map = inmap; 735 bzero((char *)&yprkv, sizeof yprkv); 736 737 r = clnt_call(ysd->dom_client, YPPROC_FIRST, 738 xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv); 739 if(r != RPC_SUCCESS) { 740 clnt_perror(ysd->dom_client, "yp_first: clnt_call"); 741 _yp_unbind(ysd); 742 goto again; 743 } 744 if( !(r=ypprot_err(yprkv.stat)) ) { 745 *outkeylen = yprkv.key.keydat_len; 746 *outkey = (char *)malloc(*outkeylen+1); 747 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 748 (*outkey)[*outkeylen] = '\0'; 749 *outvallen = yprkv.val.valdat_len; 750 *outval = (char *)malloc(*outvallen+1); 751 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 752 (*outval)[*outvallen] = '\0'; 753 } 754 755 xdr_free(xdr_ypresp_key_val, (char *)&yprkv); 756 return r; 757 } 758 759 int 760 yp_next(indomain, inmap, inkey, inkeylen, outkey, outkeylen, outval, outvallen) 761 char *indomain; 762 char *inmap; 763 char *inkey; 764 int inkeylen; 765 char **outkey; 766 int *outkeylen; 767 char **outval; 768 int *outvallen; 769 { 770 struct ypresp_key_val yprkv; 771 struct ypreq_key yprk; 772 struct dom_binding *ysd; 773 struct timeval tv; 774 int r; 775 776 /* Sanity check */ 777 778 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 779 inmap == NULL || !strlen(inmap) || 780 indomain == NULL || !strlen(indomain)) 781 return YPERR_BADARGS; 782 783 *outkey = *outval = NULL; 784 *outkeylen = *outvallen = 0; 785 786 again: 787 if( _yp_dobind(indomain, &ysd) != 0) 788 return YPERR_DOMAIN; 789 790 tv.tv_sec = _yplib_timeout; 791 tv.tv_usec = 0; 792 793 yprk.domain = indomain; 794 yprk.map = inmap; 795 yprk.key.keydat_val = inkey; 796 yprk.key.keydat_len = inkeylen; 797 bzero((char *)&yprkv, sizeof yprkv); 798 799 r = clnt_call(ysd->dom_client, YPPROC_NEXT, 800 xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv); 801 if(r != RPC_SUCCESS) { 802 clnt_perror(ysd->dom_client, "yp_next: clnt_call"); 803 _yp_unbind(ysd); 804 goto again; 805 } 806 if( !(r=ypprot_err(yprkv.stat)) ) { 807 *outkeylen = yprkv.key.keydat_len; 808 *outkey = (char *)malloc(*outkeylen+1); 809 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 810 (*outkey)[*outkeylen] = '\0'; 811 *outvallen = yprkv.val.valdat_len; 812 *outval = (char *)malloc(*outvallen+1); 813 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 814 (*outval)[*outvallen] = '\0'; 815 } 816 817 xdr_free(xdr_ypresp_key_val, (char *)&yprkv); 818 return r; 819 } 820 821 int 822 yp_all(indomain, inmap, incallback) 823 char *indomain; 824 char *inmap; 825 struct ypall_callback *incallback; 826 { 827 struct ypreq_nokey yprnk; 828 struct dom_binding *ysd; 829 struct timeval tv; 830 struct sockaddr_in clnt_sin; 831 CLIENT *clnt; 832 u_long status, savstat; 833 int clnt_sock; 834 835 /* Sanity check */ 836 837 if (indomain == NULL || !strlen(indomain) || 838 inmap == NULL || !strlen(inmap)) 839 return YPERR_BADARGS; 840 841 again: 842 843 if( _yp_dobind(indomain, &ysd) != 0) 844 return YPERR_DOMAIN; 845 846 tv.tv_sec = _yplib_timeout; 847 tv.tv_usec = 0; 848 849 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */ 850 851 clnt_sock = RPC_ANYSOCK; 852 clnt_sin = ysd->dom_server_addr; 853 clnt_sin.sin_port = 0; 854 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0); 855 if(clnt==NULL) { 856 printf("clnttcp_create failed\n"); 857 return YPERR_PMAP; 858 } 859 860 yprnk.domain = indomain; 861 yprnk.map = inmap; 862 ypresp_allfn = incallback->foreach; 863 ypresp_data = (void *)incallback->data; 864 865 if (clnt_call(clnt, YPPROC_ALL, 866 xdr_ypreq_nokey, &yprnk, 867 xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) { 868 clnt_perror(ysd->dom_client, "yp_next: clnt_call"); 869 clnt_destroy(clnt); 870 _yp_unbind(ysd); 871 goto again; 872 } 873 874 clnt_destroy(clnt); 875 savstat = status; 876 xdr_free(xdr_ypresp_all_seq, (char *)&status); /* not really needed... */ 877 if(savstat != YP_NOMORE) 878 return ypprot_err(savstat); 879 return 0; 880 } 881 882 int 883 yp_order(indomain, inmap, outorder) 884 char *indomain; 885 char *inmap; 886 int *outorder; 887 { 888 struct dom_binding *ysd; 889 struct ypresp_order ypro; 890 struct ypreq_nokey yprnk; 891 struct timeval tv; 892 int r; 893 894 /* Sanity check */ 895 896 if (indomain == NULL || !strlen(indomain) || 897 inmap == NULL || !strlen(inmap)) 898 return YPERR_BADARGS; 899 900 again: 901 if( _yp_dobind(indomain, &ysd) != 0) 902 return YPERR_DOMAIN; 903 904 tv.tv_sec = _yplib_timeout; 905 tv.tv_usec = 0; 906 907 yprnk.domain = indomain; 908 yprnk.map = inmap; 909 910 bzero((char *)(char *)&ypro, sizeof ypro); 911 912 r = clnt_call(ysd->dom_client, YPPROC_ORDER, 913 xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv); 914 915 /* 916 * NIS+ in YP compat mode doesn't support the YPPROC_ORDER 917 * procedure. 918 */ 919 if (r == RPC_PROCUNAVAIL) { 920 return(YPERR_YPERR); 921 } 922 923 if(r != RPC_SUCCESS) { 924 clnt_perror(ysd->dom_client, "yp_order: clnt_call"); 925 _yp_unbind(ysd); 926 goto again; 927 } 928 929 if( !(r=ypprot_err(ypro.stat)) ) { 930 *outorder = ypro.ordernum; 931 } 932 933 xdr_free(xdr_ypresp_order, (char *)&ypro); 934 return (r); 935 } 936 937 int 938 yp_master(indomain, inmap, outname) 939 char *indomain; 940 char *inmap; 941 char **outname; 942 { 943 struct dom_binding *ysd; 944 struct ypresp_master yprm; 945 struct ypreq_nokey yprnk; 946 struct timeval tv; 947 int r; 948 949 /* Sanity check */ 950 951 if (indomain == NULL || !strlen(indomain) || 952 inmap == NULL || !strlen(inmap)) 953 return YPERR_BADARGS; 954 again: 955 if( _yp_dobind(indomain, &ysd) != 0) 956 return YPERR_DOMAIN; 957 958 tv.tv_sec = _yplib_timeout; 959 tv.tv_usec = 0; 960 961 yprnk.domain = indomain; 962 yprnk.map = inmap; 963 964 bzero((char *)&yprm, sizeof yprm); 965 966 r = clnt_call(ysd->dom_client, YPPROC_MASTER, 967 xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv); 968 if(r != RPC_SUCCESS) { 969 clnt_perror(ysd->dom_client, "yp_master: clnt_call"); 970 _yp_unbind(ysd); 971 goto again; 972 } 973 974 if( !(r=ypprot_err(yprm.stat)) ) { 975 *outname = (char *)strdup(yprm.peer); 976 } 977 978 xdr_free(xdr_ypresp_master, (char *)&yprm); 979 return (r); 980 } 981 int 982 yp_maplist(indomain, outmaplist) 983 char *indomain; 984 struct ypmaplist **outmaplist; 985 { 986 struct dom_binding *ysd; 987 struct ypresp_maplist ypml; 988 struct timeval tv; 989 int r; 990 991 /* Sanity check */ 992 993 if (indomain == NULL || !strlen(indomain)) 994 return YPERR_BADARGS; 995 996 again: 997 if( _yp_dobind(indomain, &ysd) != 0) 998 return YPERR_DOMAIN; 999 1000 tv.tv_sec = _yplib_timeout; 1001 tv.tv_usec = 0; 1002 1003 bzero((char *)&ypml, sizeof ypml); 1004 1005 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST, 1006 xdr_domainname,(char *)&indomain,xdr_ypresp_maplist,&ypml,tv); 1007 if (r != RPC_SUCCESS) { 1008 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call"); 1009 _yp_unbind(ysd); 1010 goto again; 1011 } 1012 if( !(r=ypprot_err(ypml.stat)) ) { 1013 *outmaplist = ypml.maps; 1014 } 1015 1016 /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/ 1017 return (r); 1018 } 1019 1020 char * 1021 yperr_string(incode) 1022 int incode; 1023 { 1024 static char err[80]; 1025 1026 switch(incode) { 1027 case 0: 1028 return "Success"; 1029 case YPERR_BADARGS: 1030 return "Request arguments bad"; 1031 case YPERR_RPC: 1032 return "RPC failure"; 1033 case YPERR_DOMAIN: 1034 return "Can't bind to server which serves this domain"; 1035 case YPERR_MAP: 1036 return "No such map in server's domain"; 1037 case YPERR_KEY: 1038 return "No such key in map"; 1039 case YPERR_YPERR: 1040 return "YP server error"; 1041 case YPERR_RESRC: 1042 return "Local resource allocation failure"; 1043 case YPERR_NOMORE: 1044 return "No more records in map database"; 1045 case YPERR_PMAP: 1046 return "Can't communicate with portmapper"; 1047 case YPERR_YPBIND: 1048 return "Can't communicate with ypbind"; 1049 case YPERR_YPSERV: 1050 return "Can't communicate with ypserv"; 1051 case YPERR_NODOM: 1052 return "Local domain name not set"; 1053 case YPERR_BADDB: 1054 return "Server data base is bad"; 1055 case YPERR_VERS: 1056 return "YP server version mismatch - server can't supply service."; 1057 case YPERR_ACCESS: 1058 return "Access violation"; 1059 case YPERR_BUSY: 1060 return "Database is busy"; 1061 } 1062 sprintf(err, "YP unknown error %d\n", incode); 1063 return err; 1064 } 1065 1066 int 1067 ypprot_err(incode) 1068 unsigned int incode; 1069 { 1070 switch(incode) { 1071 case YP_TRUE: 1072 return 0; 1073 case YP_FALSE: 1074 return YPERR_YPBIND; 1075 case YP_NOMORE: 1076 return YPERR_NOMORE; 1077 case YP_NOMAP: 1078 return YPERR_MAP; 1079 case YP_NODOM: 1080 return YPERR_DOMAIN; 1081 case YP_NOKEY: 1082 return YPERR_KEY; 1083 case YP_BADOP: 1084 return YPERR_YPERR; 1085 case YP_BADDB: 1086 return YPERR_BADDB; 1087 case YP_YPERR: 1088 return YPERR_YPERR; 1089 case YP_BADARGS: 1090 return YPERR_BADARGS; 1091 case YP_VERS: 1092 return YPERR_VERS; 1093 } 1094 return YPERR_YPERR; 1095 } 1096 1097 int 1098 _yp_check(dom) 1099 char **dom; 1100 { 1101 char *unused; 1102 1103 if( _yp_domain[0]=='\0' ) 1104 if( yp_get_default_domain(&unused) ) 1105 return 0; 1106 1107 if(dom) 1108 *dom = _yp_domain; 1109 1110 if( yp_bind(_yp_domain)==0 ) { 1111 yp_unbind(_yp_domain); 1112 return 1; 1113 } 1114 return 0; 1115 } 1116