1 /* 2 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef LINT 31 static char *rcsid = "$Id: yplib.c,v 1.22 1996/06/04 17:35:15 jraynard Exp $"; 32 #endif 33 34 #include <sys/param.h> 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 #include <sys/file.h> 38 #include <sys/uio.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <string.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <rpc/rpc.h> 45 #include <rpc/xdr.h> 46 #include <rpcsvc/yp.h> 47 48 49 /* 50 * We have to define these here due to clashes between yp_prot.h and 51 * yp.h. 52 */ 53 54 struct dom_binding { 55 struct dom_binding *dom_pnext; 56 char dom_domain[YPMAXDOMAIN + 1]; 57 struct sockaddr_in dom_server_addr; 58 u_short dom_server_port; 59 int dom_socket; 60 CLIENT *dom_client; 61 u_short dom_local_port; /* now I finally know what this is for. */ 62 long dom_vers; 63 }; 64 65 #include <rpcsvc/ypclnt.h> 66 67 #ifndef BINDINGDIR 68 #define BINDINGDIR "/var/yp/binding" 69 #endif 70 #define YPMATCHCACHE 71 #define MAX_RETRIES 20 72 73 extern bool_t xdr_domainname(), xdr_ypbind_resp(); 74 extern bool_t xdr_ypreq_key(), xdr_ypresp_val(); 75 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val(); 76 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq(); 77 extern bool_t xdr_ypresp_master(); 78 79 int (*ypresp_allfn)(); 80 void *ypresp_data; 81 82 struct dom_binding *_ypbindlist; 83 static char _yp_domain[MAXHOSTNAMELEN]; 84 int _yplib_timeout = 10; 85 86 #ifdef YPMATCHCACHE 87 int _yplib_cache = 5; 88 89 static struct ypmatch_ent { 90 struct ypmatch_ent *next; 91 char *map, *key, *val; 92 int keylen, vallen; 93 time_t expire_t; 94 } *ypmc; 95 96 static void 97 ypmatch_add(map, key, keylen, val, vallen) 98 char *map; 99 char *key; 100 int keylen; 101 char *val; 102 int vallen; 103 { 104 struct ypmatch_ent *ep; 105 time_t t; 106 107 time(&t); 108 109 for(ep=ypmc; ep; ep=ep->next) 110 if(ep->expire_t < t) 111 break; 112 if(ep==NULL) { 113 ep = (struct ypmatch_ent *)malloc(sizeof *ep); 114 bzero((char *)ep, sizeof *ep); 115 if(ypmc) 116 ep->next = ypmc; 117 ypmc = ep; 118 } 119 120 if(ep->key) 121 free(ep->key); 122 if(ep->val) 123 free(ep->val); 124 125 ep->key = NULL; 126 ep->val = NULL; 127 128 ep->key = (char *)malloc(keylen); 129 if(ep->key==NULL) 130 return; 131 132 ep->val = (char *)malloc(vallen); 133 if(ep->key==NULL) { 134 free(ep->key); 135 ep->key = NULL; 136 return; 137 } 138 ep->keylen = keylen; 139 ep->vallen = vallen; 140 141 bcopy(key, ep->key, ep->keylen); 142 bcopy(val, ep->val, ep->vallen); 143 144 if(ep->map) { 145 if( strcmp(ep->map, map) ) { 146 free(ep->map); 147 ep->map = strdup(map); 148 } 149 } else { 150 ep->map = strdup(map); 151 } 152 153 ep->expire_t = t + _yplib_cache; 154 } 155 156 static bool_t 157 ypmatch_find(map, key, keylen, val, vallen) 158 char *map; 159 char *key; 160 int keylen; 161 char **val; 162 int *vallen; 163 { 164 struct ypmatch_ent *ep; 165 time_t t; 166 167 if(ypmc==NULL) 168 return 0; 169 170 time(&t); 171 172 for(ep=ypmc; ep; ep=ep->next) { 173 if(ep->keylen != keylen) 174 continue; 175 if(strcmp(ep->map, map)) 176 continue; 177 if(bcmp(ep->key, key, keylen)) 178 continue; 179 if(t > ep->expire_t) 180 continue; 181 182 *val = ep->val; 183 *vallen = ep->vallen; 184 return 1; 185 } 186 return 0; 187 } 188 #endif 189 190 char * 191 ypbinderr_string(incode) 192 int incode; 193 { 194 static char err[80]; 195 switch(incode) { 196 case 0: 197 return "Success"; 198 case YPBIND_ERR_ERR: 199 return "Internal ypbind error"; 200 case YPBIND_ERR_NOSERV: 201 return "Domain not bound"; 202 case YPBIND_ERR_RESC: 203 return "System resource allocation failure"; 204 } 205 sprintf(err, "Unknown ypbind error: #%d\n", incode); 206 return err; 207 } 208 209 int 210 _yp_dobind(dom, ypdb) 211 char *dom; 212 struct dom_binding **ypdb; 213 { 214 static pid_t pid = -1; 215 char path[MAXPATHLEN]; 216 struct dom_binding *ysd, *ysd2; 217 struct ypbind_resp ypbr; 218 struct timeval tv; 219 struct sockaddr_in clnt_sin; 220 int clnt_sock, fd; 221 pid_t gpid; 222 CLIENT *client; 223 int new = 0, r; 224 int retries = 0; 225 struct sockaddr_in check; 226 int checklen = sizeof(struct sockaddr_in); 227 228 gpid = getpid(); 229 if( !(pid==-1 || pid==gpid) ) { 230 ysd = _ypbindlist; 231 while(ysd) { 232 if(ysd->dom_client) 233 clnt_destroy(ysd->dom_client); 234 ysd2 = ysd->dom_pnext; 235 free(ysd); 236 ysd = ysd2; 237 } 238 _ypbindlist = NULL; 239 } 240 pid = gpid; 241 242 if(ypdb!=NULL) 243 *ypdb = NULL; 244 245 if(dom==NULL || strlen(dom)==0) 246 return YPERR_BADARGS; 247 248 for(ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext) 249 if( strcmp(dom, ysd->dom_domain) == 0) 250 break; 251 252 253 if(ysd==NULL) { 254 ysd = (struct dom_binding *)malloc(sizeof *ysd); 255 bzero((char *)ysd, sizeof *ysd); 256 ysd->dom_socket = -1; 257 ysd->dom_vers = 0; 258 new = 1; 259 } else { 260 /* Check the socket -- may have been hosed by the caller. */ 261 if (getsockname(ysd->dom_socket, (struct sockaddr *)&check, 262 &checklen) == -1 || check.sin_family != AF_INET || 263 check.sin_port != ysd->dom_local_port) { 264 /* Socket became bogus somehow... need to rebind. */ 265 int save, sock; 266 267 sock = ysd->dom_socket; 268 save = dup(ysd->dom_socket); 269 clnt_destroy(ysd->dom_client); 270 ysd->dom_vers = 0; 271 ysd->dom_client = NULL; 272 sock = dup2(save, sock); 273 close(save); 274 } 275 } 276 277 again: 278 retries++; 279 if (retries > MAX_RETRIES) { 280 if (new) 281 free(ysd); 282 return(YPERR_YPBIND); 283 } 284 #ifdef BINDINGDIR 285 if(ysd->dom_vers==0) { 286 /* 287 * We're trying to make a new binding: zorch the 288 * existing handle now (if any). 289 */ 290 if(ysd->dom_client) { 291 clnt_destroy(ysd->dom_client); 292 ysd->dom_client = NULL; 293 ysd->dom_socket = -1; 294 } 295 sprintf(path, "%s/%s.%d", BINDINGDIR, dom, 2); 296 if( (fd=open(path, O_RDONLY)) == -1) { 297 /* no binding file, YP is dead. */ 298 /* Try to bring it back to life. */ 299 close(fd); 300 goto skipit; 301 } 302 if( flock(fd, LOCK_EX|LOCK_NB) == -1 && errno==EWOULDBLOCK) { 303 struct iovec iov[2]; 304 struct ypbind_resp ybr; 305 u_short ypb_port; 306 307 iov[0].iov_base = (caddr_t)&ypb_port; 308 iov[0].iov_len = sizeof ypb_port; 309 iov[1].iov_base = (caddr_t)&ybr; 310 iov[1].iov_len = sizeof ybr; 311 312 r = readv(fd, iov, 2); 313 if(r != iov[0].iov_len + iov[1].iov_len) { 314 close(fd); 315 ysd->dom_vers = -1; 316 goto again; 317 } 318 319 bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 320 ysd->dom_server_addr.sin_family = AF_INET; 321 ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in); 322 ysd->dom_server_addr.sin_addr.s_addr = 323 *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 324 ysd->dom_server_addr.sin_port = 325 *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 326 327 ysd->dom_server_port = ysd->dom_server_addr.sin_port; 328 close(fd); 329 goto gotit; 330 } else { 331 /* no lock on binding file, YP is dead. */ 332 /* Try to bring it back to life. */ 333 close(fd); 334 goto skipit; 335 } 336 } 337 skipit: 338 #endif 339 if(ysd->dom_vers==-1 || ysd->dom_vers==0) { 340 /* 341 * We're trying to make a new binding: zorch the 342 * existing handle now (if any). 343 */ 344 if(ysd->dom_client) { 345 clnt_destroy(ysd->dom_client); 346 ysd->dom_client = NULL; 347 ysd->dom_socket = -1; 348 } 349 bzero((char *)&clnt_sin, sizeof clnt_sin); 350 clnt_sin.sin_family = AF_INET; 351 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 352 353 clnt_sock = RPC_ANYSOCK; 354 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock, 355 0, 0); 356 if(client==NULL) { 357 /* 358 * These conditions indicate ypbind just isn't 359 * alive -- we probably don't want to shoot our 360 * mouth off in this case; instead generate error 361 * messages only for really exotic problems. 362 */ 363 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED && 364 (rpc_createerr.cf_stat != RPC_SYSTEMERROR && 365 rpc_createerr.cf_error.re_errno == ECONNREFUSED)) 366 clnt_pcreateerror("clnttcp_create"); 367 if(new) 368 free(ysd); 369 return (YPERR_YPBIND); 370 } 371 372 /* 373 * Check the port number -- should be < IPPORT_RESERVED. 374 * If not, it's possible someone has registered a bogus 375 * ypbind with the portmapper and is trying to trick us. 376 */ 377 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) { 378 clnt_destroy(client); 379 if (new) 380 free(ysd); 381 return(YPERR_YPBIND); 382 } 383 tv.tv_sec = _yplib_timeout/2; 384 tv.tv_usec = 0; 385 r = clnt_call(client, YPBINDPROC_DOMAIN, 386 xdr_domainname, (char *)&dom, xdr_ypbind_resp, &ypbr, tv); 387 if(r != RPC_SUCCESS) { 388 clnt_destroy(client); 389 ysd->dom_vers = -1; 390 if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) { 391 if (new) 392 free(ysd); 393 return(YPERR_YPBIND); 394 } 395 fprintf(stderr, 396 "YP: server for domain %s not responding, retrying\n", dom); 397 goto again; 398 } else { 399 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 400 clnt_destroy(client); 401 ysd->dom_vers = -1; 402 sleep(_yplib_timeout/2); 403 goto again; 404 } 405 } 406 clnt_destroy(client); 407 408 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr); 409 ysd->dom_server_addr.sin_family = AF_INET; 410 ysd->dom_server_addr.sin_port = 411 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 412 ysd->dom_server_addr.sin_addr.s_addr = 413 *(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 414 415 /* 416 * We could do a reserved port check here too, but this 417 * could pose compatibility problems. The local ypbind is 418 * supposed to decide whether or not to trust yp servers 419 * on insecure ports. For now, we trust its judgement. 420 */ 421 ysd->dom_server_port = 422 *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port; 423 gotit: 424 ysd->dom_vers = YPVERS; 425 strcpy(ysd->dom_domain, dom); 426 } 427 428 /* Don't rebuild the connection to the server unless we have to. */ 429 if (ysd->dom_client == NULL) { 430 tv.tv_sec = _yplib_timeout/2; 431 tv.tv_usec = 0; 432 ysd->dom_socket = RPC_ANYSOCK; 433 ysd->dom_client = clntudp_create(&ysd->dom_server_addr, 434 YPPROG, YPVERS, tv, &ysd->dom_socket); 435 if(ysd->dom_client==NULL) { 436 clnt_pcreateerror("clntudp_create"); 437 ysd->dom_vers = -1; 438 goto again; 439 } 440 if( fcntl(ysd->dom_socket, F_SETFD, 1) == -1) 441 perror("fcntl: F_SETFD"); 442 /* 443 * We want a port number associated with this socket 444 * so that we can check its authenticity later. 445 */ 446 checklen = sizeof(struct sockaddr_in); 447 bzero((char *)&check, checklen); 448 bind(ysd->dom_socket, (struct sockaddr *)&check, checklen); 449 check.sin_family = AF_INET; 450 if (!getsockname(ysd->dom_socket, 451 (struct sockaddr *)&check, &checklen)) { 452 ysd->dom_local_port = check.sin_port; 453 } else { 454 clnt_destroy(ysd->dom_client); 455 if (new) 456 free(ysd); 457 return(YPERR_YPBIND); 458 } 459 } 460 461 if(new) { 462 ysd->dom_pnext = _ypbindlist; 463 _ypbindlist = ysd; 464 } 465 466 if(ypdb!=NULL) 467 *ypdb = ysd; 468 return 0; 469 } 470 471 static void 472 _yp_unbind(ypb) 473 struct dom_binding *ypb; 474 { 475 if (ypb->dom_client) 476 clnt_destroy(ypb->dom_client); 477 ypb->dom_client = NULL; 478 ypb->dom_socket = -1; 479 ypb->dom_vers = -1; 480 } 481 482 int 483 yp_bind(dom) 484 char *dom; 485 { 486 return _yp_dobind(dom, NULL); 487 } 488 489 void 490 yp_unbind(dom) 491 char *dom; 492 { 493 struct dom_binding *ypb, *ypbp; 494 495 ypbp = NULL; 496 for(ypb=_ypbindlist; ypb; ypb=ypb->dom_pnext) { 497 if( strcmp(dom, ypb->dom_domain) == 0) { 498 _yp_unbind(ypb); 499 if(ypbp) 500 ypbp->dom_pnext = ypb->dom_pnext; 501 else 502 _ypbindlist = ypb->dom_pnext; 503 free(ypb); 504 return; 505 } 506 ypbp = ypb; 507 } 508 return; 509 } 510 511 int 512 yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen) 513 char *indomain; 514 char *inmap; 515 const char *inkey; 516 int inkeylen; 517 char **outval; 518 int *outvallen; 519 { 520 struct dom_binding *ysd; 521 struct ypresp_val yprv; 522 struct timeval tv; 523 struct ypreq_key yprk; 524 int r; 525 526 *outval = NULL; 527 *outvallen = 0; 528 529 /* Sanity check */ 530 531 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 532 inmap == NULL || !strlen(inmap) || 533 indomain == NULL || !strlen(indomain)) 534 return YPERR_BADARGS; 535 536 #ifdef YPMATCHCACHE 537 if( !strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey, 538 inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) { 539 *outvallen = yprv.val.valdat_len; 540 *outval = (char *)malloc(*outvallen+1); 541 bcopy(yprv.val.valdat_val, *outval, *outvallen); 542 (*outval)[*outvallen] = '\0'; 543 return 0; 544 } 545 #endif 546 547 again: 548 if( _yp_dobind(indomain, &ysd) != 0) 549 return YPERR_DOMAIN; 550 551 tv.tv_sec = _yplib_timeout; 552 tv.tv_usec = 0; 553 554 yprk.domain = indomain; 555 yprk.map = inmap; 556 yprk.key.keydat_val = (char *)inkey; 557 yprk.key.keydat_len = inkeylen; 558 559 bzero((char *)&yprv, sizeof yprv); 560 561 r = clnt_call(ysd->dom_client, YPPROC_MATCH, 562 xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv); 563 if(r != RPC_SUCCESS) { 564 clnt_perror(ysd->dom_client, "yp_match: clnt_call"); 565 _yp_unbind(ysd); 566 goto again; 567 } 568 569 if( !(r=ypprot_err(yprv.stat)) ) { 570 *outvallen = yprv.val.valdat_len; 571 *outval = (char *)malloc(*outvallen+1); 572 bcopy(yprv.val.valdat_val, *outval, *outvallen); 573 (*outval)[*outvallen] = '\0'; 574 #ifdef YPMATCHCACHE 575 if( strcmp(_yp_domain, indomain)==0 ) 576 ypmatch_add(inmap, inkey, inkeylen, *outval, *outvallen); 577 #endif 578 } 579 580 xdr_free(xdr_ypresp_val, (char *)&yprv); 581 return r; 582 } 583 584 int 585 yp_get_default_domain(domp) 586 char **domp; 587 { 588 *domp = NULL; 589 if(_yp_domain[0] == '\0') 590 if( getdomainname(_yp_domain, sizeof _yp_domain)) 591 return YPERR_NODOM; 592 *domp = _yp_domain; 593 return 0; 594 } 595 596 int 597 yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen) 598 char *indomain; 599 char *inmap; 600 char **outkey; 601 int *outkeylen; 602 char **outval; 603 int *outvallen; 604 { 605 struct ypresp_key_val yprkv; 606 struct ypreq_nokey yprnk; 607 struct dom_binding *ysd; 608 struct timeval tv; 609 int r; 610 611 /* Sanity check */ 612 613 if (indomain == NULL || !strlen(indomain) || 614 inmap == NULL || !strlen(inmap)) 615 return YPERR_BADARGS; 616 617 *outkey = *outval = NULL; 618 *outkeylen = *outvallen = 0; 619 620 again: 621 if( _yp_dobind(indomain, &ysd) != 0) 622 return YPERR_DOMAIN; 623 624 tv.tv_sec = _yplib_timeout; 625 tv.tv_usec = 0; 626 627 yprnk.domain = indomain; 628 yprnk.map = inmap; 629 bzero((char *)&yprkv, sizeof yprkv); 630 631 r = clnt_call(ysd->dom_client, YPPROC_FIRST, 632 xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv); 633 if(r != RPC_SUCCESS) { 634 clnt_perror(ysd->dom_client, "yp_first: clnt_call"); 635 _yp_unbind(ysd); 636 goto again; 637 } 638 if( !(r=ypprot_err(yprkv.stat)) ) { 639 *outkeylen = yprkv.key.keydat_len; 640 *outkey = (char *)malloc(*outkeylen+1); 641 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 642 (*outkey)[*outkeylen] = '\0'; 643 *outvallen = yprkv.val.valdat_len; 644 *outval = (char *)malloc(*outvallen+1); 645 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 646 (*outval)[*outvallen] = '\0'; 647 } 648 649 xdr_free(xdr_ypresp_key_val, (char *)&yprkv); 650 return r; 651 } 652 653 int 654 yp_next(indomain, inmap, inkey, inkeylen, outkey, outkeylen, outval, outvallen) 655 char *indomain; 656 char *inmap; 657 char *inkey; 658 int inkeylen; 659 char **outkey; 660 int *outkeylen; 661 char **outval; 662 int *outvallen; 663 { 664 struct ypresp_key_val yprkv; 665 struct ypreq_key yprk; 666 struct dom_binding *ysd; 667 struct timeval tv; 668 int r; 669 670 /* Sanity check */ 671 672 if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 || 673 inmap == NULL || !strlen(inmap) || 674 indomain == NULL || !strlen(indomain)) 675 return YPERR_BADARGS; 676 677 *outkey = *outval = NULL; 678 *outkeylen = *outvallen = 0; 679 680 again: 681 if( _yp_dobind(indomain, &ysd) != 0) 682 return YPERR_DOMAIN; 683 684 tv.tv_sec = _yplib_timeout; 685 tv.tv_usec = 0; 686 687 yprk.domain = indomain; 688 yprk.map = inmap; 689 yprk.key.keydat_val = inkey; 690 yprk.key.keydat_len = inkeylen; 691 bzero((char *)&yprkv, sizeof yprkv); 692 693 r = clnt_call(ysd->dom_client, YPPROC_NEXT, 694 xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv); 695 if(r != RPC_SUCCESS) { 696 clnt_perror(ysd->dom_client, "yp_next: clnt_call"); 697 _yp_unbind(ysd); 698 goto again; 699 } 700 if( !(r=ypprot_err(yprkv.stat)) ) { 701 *outkeylen = yprkv.key.keydat_len; 702 *outkey = (char *)malloc(*outkeylen+1); 703 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen); 704 (*outkey)[*outkeylen] = '\0'; 705 *outvallen = yprkv.val.valdat_len; 706 *outval = (char *)malloc(*outvallen+1); 707 bcopy(yprkv.val.valdat_val, *outval, *outvallen); 708 (*outval)[*outvallen] = '\0'; 709 } 710 711 xdr_free(xdr_ypresp_key_val, (char *)&yprkv); 712 return r; 713 } 714 715 int 716 yp_all(indomain, inmap, incallback) 717 char *indomain; 718 char *inmap; 719 struct ypall_callback *incallback; 720 { 721 struct ypreq_nokey yprnk; 722 struct dom_binding *ysd; 723 struct timeval tv; 724 struct sockaddr_in clnt_sin; 725 CLIENT *clnt; 726 u_long status, savstat; 727 int clnt_sock; 728 729 /* Sanity check */ 730 731 if (indomain == NULL || !strlen(indomain) || 732 inmap == NULL || !strlen(inmap)) 733 return YPERR_BADARGS; 734 735 again: 736 737 if( _yp_dobind(indomain, &ysd) != 0) 738 return YPERR_DOMAIN; 739 740 tv.tv_sec = _yplib_timeout; 741 tv.tv_usec = 0; 742 743 /* YPPROC_ALL manufactures its own channel to ypserv using TCP */ 744 745 clnt_sock = RPC_ANYSOCK; 746 clnt_sin = ysd->dom_server_addr; 747 clnt_sin.sin_port = 0; 748 clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0); 749 if(clnt==NULL) { 750 printf("clnttcp_create failed\n"); 751 return YPERR_PMAP; 752 } 753 754 yprnk.domain = indomain; 755 yprnk.map = inmap; 756 ypresp_allfn = incallback->foreach; 757 ypresp_data = (void *)incallback->data; 758 759 if (clnt_call(clnt, YPPROC_ALL, 760 xdr_ypreq_nokey, &yprnk, 761 xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) { 762 clnt_perror(ysd->dom_client, "yp_next: clnt_call"); 763 clnt_destroy(clnt); 764 _yp_unbind(ysd); 765 goto again; 766 } 767 768 clnt_destroy(clnt); 769 savstat = status; 770 xdr_free(xdr_ypresp_all_seq, (char *)&status); /* not really needed... */ 771 if(savstat != YP_NOMORE) 772 return ypprot_err(savstat); 773 return 0; 774 } 775 776 int 777 yp_order(indomain, inmap, outorder) 778 char *indomain; 779 char *inmap; 780 int *outorder; 781 { 782 struct dom_binding *ysd; 783 struct ypresp_order ypro; 784 struct ypreq_nokey yprnk; 785 struct timeval tv; 786 int r; 787 788 /* Sanity check */ 789 790 if (indomain == NULL || !strlen(indomain) || 791 inmap == NULL || !strlen(inmap)) 792 return YPERR_BADARGS; 793 794 again: 795 if( _yp_dobind(indomain, &ysd) != 0) 796 return YPERR_DOMAIN; 797 798 tv.tv_sec = _yplib_timeout; 799 tv.tv_usec = 0; 800 801 yprnk.domain = indomain; 802 yprnk.map = inmap; 803 804 bzero((char *)(char *)&ypro, sizeof ypro); 805 806 r = clnt_call(ysd->dom_client, YPPROC_ORDER, 807 xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv); 808 if(r != RPC_SUCCESS) { 809 clnt_perror(ysd->dom_client, "yp_order: clnt_call"); 810 _yp_unbind(ysd); 811 goto again; 812 } 813 814 if( !(r=ypprot_err(ypro.stat)) ) { 815 *outorder = ypro.ordernum; 816 } 817 818 xdr_free(xdr_ypresp_order, (char *)&ypro); 819 return (r); 820 } 821 822 int 823 yp_master(indomain, inmap, outname) 824 char *indomain; 825 char *inmap; 826 char **outname; 827 { 828 struct dom_binding *ysd; 829 struct ypresp_master yprm; 830 struct ypreq_nokey yprnk; 831 struct timeval tv; 832 int r; 833 834 /* Sanity check */ 835 836 if (indomain == NULL || !strlen(indomain) || 837 inmap == NULL || !strlen(inmap)) 838 return YPERR_BADARGS; 839 again: 840 if( _yp_dobind(indomain, &ysd) != 0) 841 return YPERR_DOMAIN; 842 843 tv.tv_sec = _yplib_timeout; 844 tv.tv_usec = 0; 845 846 yprnk.domain = indomain; 847 yprnk.map = inmap; 848 849 bzero((char *)&yprm, sizeof yprm); 850 851 r = clnt_call(ysd->dom_client, YPPROC_MASTER, 852 xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv); 853 if(r != RPC_SUCCESS) { 854 clnt_perror(ysd->dom_client, "yp_master: clnt_call"); 855 _yp_unbind(ysd); 856 goto again; 857 } 858 859 if( !(r=ypprot_err(yprm.stat)) ) { 860 *outname = (char *)strdup(yprm.peer); 861 } 862 863 xdr_free(xdr_ypresp_master, (char *)&yprm); 864 return (r); 865 } 866 int 867 yp_maplist(indomain, outmaplist) 868 char *indomain; 869 struct ypmaplist **outmaplist; 870 { 871 struct dom_binding *ysd; 872 struct ypresp_maplist ypml; 873 struct timeval tv; 874 int r; 875 876 /* Sanity check */ 877 878 if (indomain == NULL || !strlen(indomain)) 879 return YPERR_BADARGS; 880 881 again: 882 if( _yp_dobind(indomain, &ysd) != 0) 883 return YPERR_DOMAIN; 884 885 tv.tv_sec = _yplib_timeout; 886 tv.tv_usec = 0; 887 888 bzero((char *)&ypml, sizeof ypml); 889 890 r = clnt_call(ysd->dom_client, YPPROC_MAPLIST, 891 xdr_domainname,(char *)&indomain,xdr_ypresp_maplist,&ypml,tv); 892 if (r != RPC_SUCCESS) { 893 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call"); 894 _yp_unbind(ysd); 895 goto again; 896 } 897 if( !(r=ypprot_err(ypml.stat)) ) { 898 *outmaplist = ypml.maps; 899 } 900 901 /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/ 902 return (r); 903 } 904 905 char * 906 yperr_string(incode) 907 int incode; 908 { 909 static char err[80]; 910 911 switch(incode) { 912 case 0: 913 return "Success"; 914 case YPERR_BADARGS: 915 return "Request arguments bad"; 916 case YPERR_RPC: 917 return "RPC failure"; 918 case YPERR_DOMAIN: 919 return "Can't bind to server which serves this domain"; 920 case YPERR_MAP: 921 return "No such map in server's domain"; 922 case YPERR_KEY: 923 return "No such key in map"; 924 case YPERR_YPERR: 925 return "YP server error"; 926 case YPERR_RESRC: 927 return "Local resource allocation failure"; 928 case YPERR_NOMORE: 929 return "No more records in map database"; 930 case YPERR_PMAP: 931 return "Can't communicate with portmapper"; 932 case YPERR_YPBIND: 933 return "Can't communicate with ypbind"; 934 case YPERR_YPSERV: 935 return "Can't communicate with ypserv"; 936 case YPERR_NODOM: 937 return "Local domain name not set"; 938 case YPERR_BADDB: 939 return "Server data base is bad"; 940 case YPERR_VERS: 941 return "YP server version mismatch - server can't supply service."; 942 case YPERR_ACCESS: 943 return "Access violation"; 944 case YPERR_BUSY: 945 return "Database is busy"; 946 } 947 sprintf(err, "YP unknown error %d\n", incode); 948 return err; 949 } 950 951 int 952 ypprot_err(incode) 953 unsigned int incode; 954 { 955 switch(incode) { 956 case YP_TRUE: 957 return 0; 958 case YP_FALSE: 959 return YPERR_YPBIND; 960 case YP_NOMORE: 961 return YPERR_NOMORE; 962 case YP_NOMAP: 963 return YPERR_MAP; 964 case YP_NODOM: 965 return YPERR_DOMAIN; 966 case YP_NOKEY: 967 return YPERR_KEY; 968 case YP_BADOP: 969 return YPERR_YPERR; 970 case YP_BADDB: 971 return YPERR_BADDB; 972 case YP_YPERR: 973 return YPERR_YPERR; 974 case YP_BADARGS: 975 return YPERR_BADARGS; 976 case YP_VERS: 977 return YPERR_VERS; 978 } 979 return YPERR_YPERR; 980 } 981 982 int 983 _yp_check(dom) 984 char **dom; 985 { 986 char *unused; 987 988 if( _yp_domain[0]=='\0' ) 989 if( yp_get_default_domain(&unused) ) 990 return 0; 991 992 if(dom) 993 *dom = _yp_domain; 994 995 if( yp_bind(_yp_domain)==0 ) { 996 yp_unbind(_yp_domain); 997 return 1; 998 } 999 return 0; 1000 } 1001