1 /* 2 * The contents of this file are subject to the Sun Standards 3 * License Version 1.0 the (the "License";) You may not use 4 * this file except in compliance with the License. You may 5 * obtain a copy of the License at lib/libc/rpc/LICENSE 6 * 7 * Software distributed under the License is distributed on 8 * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either 9 * express or implied. See the License for the specific 10 * language governing rights and limitations under the License. 11 * 12 * The Original Code is Copyright 1998 by Sun Microsystems, Inc 13 * 14 * The Initial Developer of the Original Code is: Sun 15 * Microsystems, Inc. 16 * 17 * All Rights Reserved. 18 * 19 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 20 * unrestricted use provided that this legend is included on all tape 21 * media and as a part of the software program in whole or part. Users 22 * may copy or modify Sun RPC without charge, but are not authorized 23 * to license or distribute it to anyone else except as part of a product or 24 * program developed by the user. 25 * 26 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 27 * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 29 * 30 * Sun RPC is provided with no support and without any obligation on the 31 * part of Sun Microsystems, Inc. to assist in its use, correction, 32 * modification or enhancement. 33 * 34 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 35 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 36 * OR ANY PART THEREOF. 37 * 38 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 39 * or profits or other special, indirect and consequential damages, even if 40 * Sun has been advised of the possibility of such damages. 41 * 42 * Sun Microsystems, Inc. 43 * 2550 Garcia Avenue 44 * Mountain View, California 94043 45 * @(#)rpcb_clnt.c 1.27 94/04/24 SMI; 1.30 89/06/21 Copyr 1988 Sun Micro 46 * $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $ 47 * $FreeBSD: src/lib/libc/rpc/rpcb_clnt.c,v 1.17 2007/09/20 22:35:24 matteo Exp $ 48 */ 49 /* 50 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 51 */ 52 53 /* 54 * rpcb_clnt.c 55 * interface to rpcbind rpc service. 56 * 57 * Copyright (C) 1988, Sun Microsystems, Inc. 58 */ 59 60 #include "namespace.h" 61 #include "reentrant.h" 62 #include <sys/types.h> 63 #include <sys/socket.h> 64 #include <sys/un.h> 65 #include <sys/utsname.h> 66 #include <rpc/rpc.h> 67 #include <rpc/rpcb_prot.h> 68 #include <rpc/nettype.h> 69 #include <netconfig.h> 70 #ifdef PORTMAP 71 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */ 72 #include <rpc/pmap_prot.h> 73 #endif /* PORTMAP */ 74 #include <stdio.h> 75 #include <errno.h> 76 #include <stdlib.h> 77 #include <string.h> 78 #include <unistd.h> 79 #include <netdb.h> 80 #include <syslog.h> 81 #include "un-namespace.h" 82 83 #include "rpc_com.h" 84 #include "mt_misc.h" 85 86 static struct timeval tottimeout = { 60, 0 }; 87 static const struct timeval rmttimeout = { 3, 0 }; 88 static struct timeval rpcbrmttime = { 15, 0 }; 89 90 extern bool_t xdr_wrapstring(XDR *, char **); 91 92 static const char nullstring[] = "\000"; 93 94 #define CACHESIZE 6 95 96 struct address_cache { 97 char *ac_host; 98 char *ac_netid; 99 char *ac_uaddr; 100 struct netbuf *ac_taddr; 101 struct address_cache *ac_next; 102 }; 103 104 static struct address_cache *front; 105 static int cachesize; 106 107 #define CLCR_GET_RPCB_TIMEOUT 1 108 #define CLCR_SET_RPCB_TIMEOUT 2 109 110 111 extern int __rpc_lowvers; 112 113 static struct address_cache *check_cache(const char *, const char *); 114 static void delete_cache(struct netbuf *); 115 static void add_cache(const char *, const char *, struct netbuf *, char *); 116 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **); 117 static CLIENT *local_rpcb(void); 118 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *); 119 120 /* 121 * This routine adjusts the timeout used for calls to the remote rpcbind. 122 * Also, this routine can be used to set the use of portmapper version 2 123 * only when doing rpc_broadcasts 124 * These are private routines that may not be provided in future releases. 125 */ 126 bool_t 127 __rpc_control(int request, void *info) 128 { 129 switch (request) { 130 case CLCR_GET_RPCB_TIMEOUT: 131 *(struct timeval *)info = tottimeout; 132 break; 133 case CLCR_SET_RPCB_TIMEOUT: 134 tottimeout = *(struct timeval *)info; 135 break; 136 case CLCR_SET_LOWVERS: 137 __rpc_lowvers = *(int *)info; 138 break; 139 case CLCR_GET_LOWVERS: 140 *(int *)info = __rpc_lowvers; 141 break; 142 default: 143 return (FALSE); 144 } 145 return (TRUE); 146 } 147 148 /* 149 * It might seem that a reader/writer lock would be more reasonable here. 150 * However because getclnthandle(), the only user of the cache functions, 151 * may do a delete_cache() operation if a check_cache() fails to return an 152 * address useful to clnt_tli_create(), we may as well use a mutex. 153 */ 154 /* 155 * As it turns out, if the cache lock is *not* a reader/writer lock, we will 156 * block all clnt_create's if we are trying to connect to a host that's down, 157 * since the lock will be held all during that time. 158 */ 159 160 /* 161 * The routines check_cache(), add_cache(), delete_cache() manage the 162 * cache of rpcbind addresses for (host, netid). 163 */ 164 165 static struct address_cache * 166 check_cache(const char *host, const char *netid) 167 { 168 struct address_cache *cptr; 169 170 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 171 172 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 173 if (!strcmp(cptr->ac_host, host) && 174 !strcmp(cptr->ac_netid, netid)) { 175 #ifdef ND_DEBUG 176 fprintf(stderr, "Found cache entry for %s: %s\n", 177 host, netid); 178 #endif 179 return (cptr); 180 } 181 } 182 return (NULL); 183 } 184 185 static void 186 delete_cache(struct netbuf *addr) 187 { 188 struct address_cache *cptr, *prevptr = NULL; 189 190 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 191 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 192 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) { 193 free(cptr->ac_host); 194 free(cptr->ac_netid); 195 free(cptr->ac_taddr->buf); 196 free(cptr->ac_taddr); 197 if (cptr->ac_uaddr) 198 free(cptr->ac_uaddr); 199 if (prevptr) 200 prevptr->ac_next = cptr->ac_next; 201 else 202 front = cptr->ac_next; 203 free(cptr); 204 cachesize--; 205 break; 206 } 207 prevptr = cptr; 208 } 209 } 210 211 static void 212 add_cache(const char *host, const char *netid, struct netbuf *taddr, 213 char *uaddr) 214 { 215 struct address_cache *ad_cache, *cptr, *prevptr; 216 217 ad_cache = (struct address_cache *) 218 malloc(sizeof (struct address_cache)); 219 if (!ad_cache) { 220 return; 221 } 222 ad_cache->ac_host = strdup(host); 223 ad_cache->ac_netid = strdup(netid); 224 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL; 225 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf)); 226 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr || 227 (uaddr && !ad_cache->ac_uaddr)) { 228 goto out; 229 } 230 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len; 231 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len); 232 if (ad_cache->ac_taddr->buf == NULL) { 233 out: 234 if (ad_cache->ac_host) 235 free(ad_cache->ac_host); 236 if (ad_cache->ac_netid) 237 free(ad_cache->ac_netid); 238 if (ad_cache->ac_uaddr) 239 free(ad_cache->ac_uaddr); 240 if (ad_cache->ac_taddr) 241 free(ad_cache->ac_taddr); 242 free(ad_cache); 243 return; 244 } 245 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len); 246 #ifdef ND_DEBUG 247 fprintf(stderr, "Added to cache: %s : %s\n", host, netid); 248 #endif 249 250 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */ 251 252 rwlock_wrlock(&rpcbaddr_cache_lock); 253 if (cachesize < CACHESIZE) { 254 ad_cache->ac_next = front; 255 front = ad_cache; 256 cachesize++; 257 } else { 258 /* Free the last entry */ 259 cptr = front; 260 prevptr = NULL; 261 while (cptr->ac_next) { 262 prevptr = cptr; 263 cptr = cptr->ac_next; 264 } 265 266 #ifdef ND_DEBUG 267 fprintf(stderr, "Deleted from cache: %s : %s\n", 268 cptr->ac_host, cptr->ac_netid); 269 #endif 270 free(cptr->ac_host); 271 free(cptr->ac_netid); 272 free(cptr->ac_taddr->buf); 273 free(cptr->ac_taddr); 274 if (cptr->ac_uaddr) 275 free(cptr->ac_uaddr); 276 277 if (prevptr) { 278 prevptr->ac_next = NULL; 279 ad_cache->ac_next = front; 280 front = ad_cache; 281 } else { 282 front = ad_cache; 283 ad_cache->ac_next = NULL; 284 } 285 free(cptr); 286 } 287 rwlock_unlock(&rpcbaddr_cache_lock); 288 } 289 290 /* 291 * This routine will return a client handle that is connected to the 292 * rpcbind. If targaddr is non-NULL, the "universal address" of the 293 * host will be stored in *targaddr; the caller is responsible for 294 * freeing this string. 295 * On error, returns NULL and free's everything. 296 */ 297 static CLIENT * 298 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr) 299 { 300 CLIENT *client; 301 struct netbuf *addr, taddr; 302 struct netbuf addr_to_delete; 303 struct __rpc_sockinfo si; 304 struct addrinfo hints, *res, *tres; 305 struct address_cache *ad_cache; 306 char *tmpaddr; 307 308 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */ 309 310 /* Get the address of the rpcbind. Check cache first */ 311 client = NULL; 312 addr_to_delete.len = 0; 313 rwlock_rdlock(&rpcbaddr_cache_lock); 314 ad_cache = NULL; 315 if (host != NULL) 316 ad_cache = check_cache(host, nconf->nc_netid); 317 if (ad_cache != NULL) { 318 addr = ad_cache->ac_taddr; 319 client = clnt_tli_create(RPC_ANYFD, nconf, addr, 320 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 321 if (client != NULL) { 322 if (targaddr) 323 *targaddr = strdup(ad_cache->ac_uaddr); 324 rwlock_unlock(&rpcbaddr_cache_lock); 325 return (client); 326 } 327 addr_to_delete.len = addr->len; 328 addr_to_delete.buf = (char *)malloc(addr->len); 329 if (addr_to_delete.buf == NULL) { 330 addr_to_delete.len = 0; 331 } else { 332 memcpy(addr_to_delete.buf, addr->buf, addr->len); 333 } 334 } 335 rwlock_unlock(&rpcbaddr_cache_lock); 336 if (addr_to_delete.len != 0) { 337 /* 338 * Assume this may be due to cache data being 339 * outdated 340 */ 341 rwlock_wrlock(&rpcbaddr_cache_lock); 342 delete_cache(&addr_to_delete); 343 rwlock_unlock(&rpcbaddr_cache_lock); 344 free(addr_to_delete.buf); 345 } 346 if (!__rpc_nconf2sockinfo(nconf, &si)) { 347 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 348 return NULL; 349 } 350 351 memset(&hints, 0, sizeof hints); 352 hints.ai_family = si.si_af; 353 hints.ai_socktype = si.si_socktype; 354 hints.ai_protocol = si.si_proto; 355 356 #ifdef CLNT_DEBUG 357 printf("trying netid %s family %d proto %d socktype %d\n", 358 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype); 359 #endif 360 361 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 362 client = local_rpcb(); 363 if (! client) { 364 #ifdef ND_DEBUG 365 clnt_pcreateerror("rpcbind clnt interface"); 366 #endif 367 return (NULL); 368 } else { 369 struct sockaddr_un sun; 370 if (targaddr) { 371 *targaddr = malloc(sizeof(sun.sun_path)); 372 if (*targaddr == NULL) { 373 CLNT_DESTROY(client); 374 return (NULL); 375 } 376 strncpy(*targaddr, _PATH_RPCBINDSOCK, 377 sizeof(sun.sun_path)); 378 } 379 return (client); 380 } 381 } else { 382 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) { 383 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 384 return NULL; 385 } 386 } 387 388 for (tres = res; tres != NULL; tres = tres->ai_next) { 389 taddr.buf = tres->ai_addr; 390 taddr.len = taddr.maxlen = tres->ai_addrlen; 391 392 #ifdef ND_DEBUG 393 { 394 char *ua; 395 396 ua = taddr2uaddr(nconf, &taddr); 397 fprintf(stderr, "Got it [%s]\n", ua); 398 free(ua); 399 } 400 #endif 401 402 #ifdef ND_DEBUG 403 { 404 int i; 405 406 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n", 407 taddr.len, taddr.maxlen); 408 fprintf(stderr, "\tAddress is "); 409 for (i = 0; i < taddr.len; i++) 410 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]); 411 fprintf(stderr, "\n"); 412 } 413 #endif 414 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr, 415 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 416 #ifdef ND_DEBUG 417 if (! client) { 418 clnt_pcreateerror("rpcbind clnt interface"); 419 } 420 #endif 421 422 if (client) { 423 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL; 424 add_cache(host, nconf->nc_netid, &taddr, tmpaddr); 425 if (targaddr) 426 *targaddr = tmpaddr; 427 break; 428 } 429 } 430 if (res) 431 freeaddrinfo(res); 432 return (client); 433 } 434 435 /* XXX */ 436 #define IN4_LOCALHOST_STRING "127.0.0.1" 437 #define IN6_LOCALHOST_STRING "::1" 438 439 /* 440 * This routine will return a client handle that is connected to the local 441 * rpcbind. Returns NULL on error and free's everything. 442 */ 443 static CLIENT * 444 local_rpcb(void) 445 { 446 CLIENT *client; 447 static struct netconfig *loopnconf; 448 static char *hostname; 449 int sock; 450 size_t tsize; 451 struct netbuf nbuf; 452 struct sockaddr_un sun; 453 454 /* 455 * Try connecting to the local rpcbind through a local socket 456 * first. If this doesn't work, try all transports defined in 457 * the netconfig file. 458 */ 459 memset(&sun, 0, sizeof sun); 460 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 461 if (sock < 0) 462 goto try_nconf; 463 sun.sun_family = AF_LOCAL; 464 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 465 nbuf.len = sun.sun_len = SUN_LEN(&sun); 466 nbuf.maxlen = sizeof (struct sockaddr_un); 467 nbuf.buf = &sun; 468 469 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0); 470 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG, 471 (rpcvers_t)RPCBVERS, tsize, tsize); 472 473 if (client != NULL) { 474 /* Mark the socket to be closed in destructor */ 475 CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL); 476 return client; 477 } 478 479 /* Nobody needs this socket anymore; free the descriptor. */ 480 _close(sock); 481 482 try_nconf: 483 484 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */ 485 mutex_lock(&loopnconf_lock); 486 if (loopnconf == NULL) { 487 struct netconfig *nconf, *tmpnconf = NULL; 488 void *nc_handle; 489 int fd; 490 491 nc_handle = setnetconfig(); 492 if (nc_handle == NULL) { 493 /* fails to open netconfig file */ 494 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 495 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 496 mutex_unlock(&loopnconf_lock); 497 return (NULL); 498 } 499 while ((nconf = getnetconfig(nc_handle)) != NULL) { 500 #ifdef INET6 501 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 || 502 #else 503 if (( 504 #endif 505 strcmp(nconf->nc_protofmly, NC_INET) == 0) && 506 (nconf->nc_semantics == NC_TPI_COTS || 507 nconf->nc_semantics == NC_TPI_COTS_ORD)) { 508 fd = __rpc_nconf2fd(nconf); 509 /* 510 * Can't create a socket, assume that 511 * this family isn't configured in the kernel. 512 */ 513 if (fd < 0) 514 continue; 515 _close(fd); 516 tmpnconf = nconf; 517 if (!strcmp(nconf->nc_protofmly, NC_INET)) 518 hostname = IN4_LOCALHOST_STRING; 519 else 520 hostname = IN6_LOCALHOST_STRING; 521 } 522 } 523 if (tmpnconf == NULL) { 524 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 525 mutex_unlock(&loopnconf_lock); 526 return (NULL); 527 } 528 loopnconf = getnetconfigent(tmpnconf->nc_netid); 529 /* loopnconf is never freed */ 530 endnetconfig(nc_handle); 531 } 532 mutex_unlock(&loopnconf_lock); 533 client = getclnthandle(hostname, loopnconf, NULL); 534 return (client); 535 } 536 537 /* 538 * Set a mapping between program, version and address. 539 * Calls the rpcbind service to do the mapping. 540 */ 541 bool_t 542 rpcb_set(rpcprog_t program, rpcvers_t version, 543 const struct netconfig *nconf, /* Network structure of transport */ 544 const struct netbuf *address) /* Services netconfig address */ 545 { 546 CLIENT *client; 547 bool_t rslt = FALSE; 548 RPCB parms; 549 char uidbuf[32]; 550 551 /* parameter checking */ 552 if (nconf == NULL) { 553 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 554 return (FALSE); 555 } 556 if (address == NULL) { 557 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 558 return (FALSE); 559 } 560 client = local_rpcb(); 561 if (! client) { 562 return (FALSE); 563 } 564 565 /* convert to universal */ 566 /*LINTED const castaway*/ 567 parms.r_addr = taddr2uaddr((struct netconfig *) nconf, 568 (struct netbuf *)address); 569 if (!parms.r_addr) { 570 CLNT_DESTROY(client); 571 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 572 return (FALSE); /* no universal address */ 573 } 574 parms.r_prog = program; 575 parms.r_vers = version; 576 parms.r_netid = nconf->nc_netid; 577 /* 578 * Though uid is not being used directly, we still send it for 579 * completeness. For non-unix platforms, perhaps some other 580 * string or an empty string can be sent. 581 */ 582 snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 583 parms.r_owner = uidbuf; 584 585 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb, 586 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 587 (char *)(void *)&rslt, tottimeout); 588 589 CLNT_DESTROY(client); 590 free(parms.r_addr); 591 return (rslt); 592 } 593 594 /* 595 * Remove the mapping between program, version and netbuf address. 596 * Calls the rpcbind service to do the un-mapping. 597 * If netbuf is NULL, unset for all the transports, otherwise unset 598 * only for the given transport. 599 */ 600 bool_t 601 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf) 602 { 603 CLIENT *client; 604 bool_t rslt = FALSE; 605 RPCB parms; 606 char uidbuf[32]; 607 608 client = local_rpcb(); 609 if (! client) { 610 return (FALSE); 611 } 612 613 parms.r_prog = program; 614 parms.r_vers = version; 615 if (nconf) 616 parms.r_netid = nconf->nc_netid; 617 else { 618 /*LINTED const castaway*/ 619 parms.r_netid = (char *) &nullstring[0]; /* unsets all */ 620 } 621 /*LINTED const castaway*/ 622 parms.r_addr = (char *) &nullstring[0]; 623 snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 624 parms.r_owner = uidbuf; 625 626 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb, 627 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 628 (char *)(void *)&rslt, tottimeout); 629 630 CLNT_DESTROY(client); 631 return (rslt); 632 } 633 634 /* 635 * From the merged list, find the appropriate entry 636 */ 637 static struct netbuf * 638 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf) 639 { 640 struct netbuf *na = NULL; 641 rpcb_entry_list_ptr sp; 642 rpcb_entry *rmap; 643 644 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) { 645 rmap = &sp->rpcb_entry_map; 646 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) && 647 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) && 648 (nconf->nc_semantics == rmap->r_nc_semantics) && 649 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) { 650 na = uaddr2taddr(nconf, rmap->r_maddr); 651 #ifdef ND_DEBUG 652 fprintf(stderr, "\tRemote address is [%s].\n", 653 rmap->r_maddr); 654 if (!na) 655 fprintf(stderr, 656 "\tCouldn't resolve remote address!\n"); 657 #endif 658 break; 659 } 660 } 661 return (na); 662 } 663 664 /* 665 * Quick check to see if rpcbind is up. Tries to connect over 666 * local transport. 667 */ 668 static bool_t 669 __rpcbind_is_up(void) 670 { 671 struct netconfig *nconf; 672 struct sockaddr_un sun; 673 void *localhandle; 674 int sock; 675 676 nconf = NULL; 677 localhandle = setnetconfig(); 678 while ((nconf = getnetconfig(localhandle)) != NULL) { 679 if (nconf->nc_protofmly != NULL && 680 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 681 break; 682 } 683 if (nconf == NULL) 684 return (FALSE); 685 686 endnetconfig(localhandle); 687 688 memset(&sun, 0, sizeof sun); 689 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 690 if (sock < 0) 691 return (FALSE); 692 sun.sun_family = AF_LOCAL; 693 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path)); 694 sun.sun_len = SUN_LEN(&sun); 695 696 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) { 697 _close(sock); 698 return (FALSE); 699 } 700 701 _close(sock); 702 return (TRUE); 703 } 704 705 /* 706 * An internal function which optimizes rpcb_getaddr function. It also 707 * returns the client handle that it uses to contact the remote rpcbind. 708 * 709 * The algorithm used: If the transports is TCP or UDP, it first tries 710 * version 2 (portmap), 4 and then 3 (svr4). This order should be 711 * changed in the next OS release to 4, 2 and 3. We are assuming that by 712 * that time, version 4 would be available on many machines on the network. 713 * With this algorithm, we get performance as well as a plan for 714 * obsoleting version 2. 715 * 716 * For all other transports, the algorithm remains as 4 and then 3. 717 * 718 * XXX: Due to some problems with t_connect(), we do not reuse the same client 719 * handle for COTS cases and hence in these cases we do not return the 720 * client handle. This code will change if t_connect() ever 721 * starts working properly. Also look under clnt_vc.c. 722 */ 723 struct netbuf * 724 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version, 725 const struct netconfig *nconf, const char *host, 726 CLIENT **clpp, struct timeval *tp) 727 { 728 static bool_t check_rpcbind = TRUE; 729 CLIENT *client = NULL; 730 RPCB parms; 731 enum clnt_stat clnt_st; 732 char *ua = NULL; 733 rpcvers_t vers; 734 struct netbuf *address = NULL; 735 rpcvers_t start_vers = RPCBVERS4; 736 struct netbuf servaddr; 737 738 /* parameter checking */ 739 if (nconf == NULL) { 740 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 741 return (NULL); 742 } 743 744 parms.r_addr = NULL; 745 746 /* 747 * Use default total timeout if no timeout is specified. 748 */ 749 if (tp == NULL) 750 tp = &tottimeout; 751 752 #ifdef PORTMAP 753 /* Try version 2 for TCP or UDP */ 754 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 755 u_short port = 0; 756 struct netbuf remote; 757 rpcvers_t pmapvers = 2; 758 struct pmap pmapparms; 759 760 /* 761 * Try UDP only - there are some portmappers out 762 * there that use UDP only. 763 */ 764 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 765 struct netconfig *newnconf; 766 767 if ((newnconf = getnetconfigent("udp")) == NULL) { 768 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 769 return (NULL); 770 } 771 client = getclnthandle(host, newnconf, &parms.r_addr); 772 freenetconfigent(newnconf); 773 } else { 774 client = getclnthandle(host, nconf, &parms.r_addr); 775 } 776 if (client == NULL) 777 return (NULL); 778 779 /* 780 * Set version and retry timeout. 781 */ 782 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 783 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers); 784 785 pmapparms.pm_prog = program; 786 pmapparms.pm_vers = version; 787 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 788 IPPROTO_UDP : IPPROTO_TCP; 789 pmapparms.pm_port = 0; /* not needed */ 790 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 791 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 792 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 793 *tp); 794 if (clnt_st != RPC_SUCCESS) { 795 if ((clnt_st == RPC_PROGVERSMISMATCH) || 796 (clnt_st == RPC_PROGUNAVAIL)) 797 goto try_rpcbind; /* Try different versions */ 798 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 799 clnt_geterr(client, &rpc_createerr.cf_error); 800 goto error; 801 } else if (port == 0) { 802 address = NULL; 803 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 804 goto error; 805 } 806 port = htons(port); 807 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote); 808 if (((address = (struct netbuf *) 809 malloc(sizeof (struct netbuf))) == NULL) || 810 ((address->buf = (char *) 811 malloc(remote.len)) == NULL)) { 812 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 813 clnt_geterr(client, &rpc_createerr.cf_error); 814 if (address) { 815 free(address); 816 address = NULL; 817 } 818 goto error; 819 } 820 memcpy(address->buf, remote.buf, remote.len); 821 memcpy(&((char *)address->buf)[sizeof (short)], 822 (char *)(void *)&port, sizeof (short)); 823 address->len = address->maxlen = remote.len; 824 goto done; 825 } 826 #endif /* PORTMAP */ 827 828 try_rpcbind: 829 /* 830 * Check if rpcbind is up. This prevents needless delays when 831 * accessing applications such as the keyserver while booting 832 * disklessly. 833 */ 834 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 835 if (!__rpcbind_is_up()) { 836 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 837 rpc_createerr.cf_error.re_errno = 0; 838 goto error; 839 } 840 check_rpcbind = FALSE; 841 } 842 843 /* 844 * Now we try version 4 and then 3. 845 * We also send the remote system the address we used to 846 * contact it in case it can help to connect back with us 847 */ 848 parms.r_prog = program; 849 parms.r_vers = version; 850 /*LINTED const castaway*/ 851 parms.r_owner = (char *) &nullstring[0]; /* not needed; */ 852 /* just for xdring */ 853 parms.r_netid = nconf->nc_netid; /* not really needed */ 854 855 /* 856 * If a COTS transport is being used, try getting address via CLTS 857 * transport. This works only with version 4. 858 */ 859 if (nconf->nc_semantics == NC_TPI_COTS_ORD || 860 nconf->nc_semantics == NC_TPI_COTS) { 861 862 void *handle; 863 struct netconfig *nconf_clts; 864 rpcb_entry_list_ptr relp = NULL; 865 866 if (client == NULL) { 867 /* This did not go through the above PORTMAP/TCP code */ 868 if ((handle = __rpc_setconf("datagram_v")) != NULL) { 869 while ((nconf_clts = __rpc_getconf(handle)) 870 != NULL) { 871 if (strcmp(nconf_clts->nc_protofmly, 872 nconf->nc_protofmly) != 0) { 873 continue; 874 } 875 client = getclnthandle(host, nconf_clts, 876 &parms.r_addr); 877 break; 878 } 879 __rpc_endconf(handle); 880 } 881 if (client == NULL) 882 goto regular_rpcbind; /* Go the regular way */ 883 } else { 884 /* This is a UDP PORTMAP handle. Change to version 4 */ 885 vers = RPCBVERS4; 886 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 887 } 888 /* 889 * We also send the remote system the address we used to 890 * contact it in case it can help it connect back with us 891 */ 892 if (parms.r_addr == NULL) { 893 /*LINTED const castaway*/ 894 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */ 895 } 896 897 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 898 899 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST, 900 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 901 (xdrproc_t) xdr_rpcb_entry_list_ptr, 902 (char *)(void *)&relp, *tp); 903 if (clnt_st == RPC_SUCCESS) { 904 if ((address = got_entry(relp, nconf)) != NULL) { 905 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 906 (char *)(void *)&relp); 907 CLNT_CONTROL(client, CLGET_SVC_ADDR, 908 (char *)(void *)&servaddr); 909 __rpc_fixup_addr(address, &servaddr); 910 goto done; 911 } 912 /* Entry not found for this transport */ 913 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 914 (char *)(void *)&relp); 915 /* 916 * XXX: should have perhaps returned with error but 917 * since the remote machine might not always be able 918 * to send the address on all transports, we try the 919 * regular way with regular_rpcbind 920 */ 921 goto regular_rpcbind; 922 } else if ((clnt_st == RPC_PROGVERSMISMATCH) || 923 (clnt_st == RPC_PROGUNAVAIL)) { 924 start_vers = RPCBVERS; /* Try version 3 now */ 925 goto regular_rpcbind; /* Try different versions */ 926 } else { 927 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 928 clnt_geterr(client, &rpc_createerr.cf_error); 929 goto error; 930 } 931 } 932 933 regular_rpcbind: 934 935 /* Now the same transport is to be used to get the address */ 936 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) || 937 (nconf->nc_semantics == NC_TPI_COTS))) { 938 /* A CLTS type of client - destroy it */ 939 CLNT_DESTROY(client); 940 client = NULL; 941 } 942 943 if (client == NULL) { 944 client = getclnthandle(host, nconf, &parms.r_addr); 945 if (client == NULL) { 946 goto error; 947 } 948 } 949 if (parms.r_addr == NULL) { 950 /*LINTED const castaway*/ 951 parms.r_addr = (char *) &nullstring[0]; 952 } 953 954 /* First try from start_vers and then version 3 (RPCBVERS) */ 955 956 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime); 957 for (vers = start_vers; vers >= RPCBVERS; vers--) { 958 /* Set the version */ 959 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 960 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR, 961 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 962 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp); 963 if (clnt_st == RPC_SUCCESS) { 964 if ((ua == NULL) || (ua[0] == 0)) { 965 /* address unknown */ 966 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 967 goto error; 968 } 969 address = uaddr2taddr(nconf, ua); 970 #ifdef ND_DEBUG 971 fprintf(stderr, "\tRemote address is [%s]\n", ua); 972 if (!address) 973 fprintf(stderr, 974 "\tCouldn't resolve remote address!\n"); 975 #endif 976 xdr_free((xdrproc_t)xdr_wrapstring, 977 (char *)(void *)&ua); 978 979 if (! address) { 980 /* We don't know about your universal address */ 981 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 982 goto error; 983 } 984 CLNT_CONTROL(client, CLGET_SVC_ADDR, 985 (char *)(void *)&servaddr); 986 __rpc_fixup_addr(address, &servaddr); 987 goto done; 988 } else if (clnt_st == RPC_PROGVERSMISMATCH) { 989 struct rpc_err rpcerr; 990 991 clnt_geterr(client, &rpcerr); 992 if (rpcerr.re_vers.low > RPCBVERS4) 993 goto error; /* a new version, can't handle */ 994 } else if (clnt_st != RPC_PROGUNAVAIL) { 995 /* Cant handle this error */ 996 rpc_createerr.cf_stat = clnt_st; 997 clnt_geterr(client, &rpc_createerr.cf_error); 998 goto error; 999 } 1000 } 1001 1002 error: 1003 if (client) { 1004 CLNT_DESTROY(client); 1005 client = NULL; 1006 } 1007 done: 1008 if (nconf->nc_semantics != NC_TPI_CLTS) { 1009 /* This client is the connectionless one */ 1010 if (client) { 1011 CLNT_DESTROY(client); 1012 client = NULL; 1013 } 1014 } 1015 if (clpp) { 1016 *clpp = client; 1017 } else if (client) { 1018 CLNT_DESTROY(client); 1019 } 1020 if (parms.r_addr != NULL && parms.r_addr != nullstring) 1021 free(parms.r_addr); 1022 return (address); 1023 } 1024 1025 1026 /* 1027 * Find the mapped address for program, version. 1028 * Calls the rpcbind service remotely to do the lookup. 1029 * Uses the transport specified in nconf. 1030 * Returns FALSE (0) if no map exists, else returns 1. 1031 * 1032 * Assuming that the address is all properly allocated 1033 */ 1034 int 1035 rpcb_getaddr(rpcprog_t program, rpcvers_t version, 1036 const struct netconfig *nconf, struct netbuf *address, 1037 const char *host) 1038 { 1039 struct netbuf *na; 1040 1041 if ((na = __rpcb_findaddr_timed(program, version, 1042 (struct netconfig *) nconf, (char *) host, 1043 NULL, NULL)) == NULL) 1044 return (FALSE); 1045 1046 if (na->len > address->maxlen) { 1047 /* Too long address */ 1048 free(na->buf); 1049 free(na); 1050 rpc_createerr.cf_stat = RPC_FAILED; 1051 return (FALSE); 1052 } 1053 memcpy(address->buf, na->buf, (size_t)na->len); 1054 address->len = na->len; 1055 free(na->buf); 1056 free(na); 1057 return (TRUE); 1058 } 1059 1060 /* 1061 * Get a copy of the current maps. 1062 * Calls the rpcbind service remotely to get the maps. 1063 * 1064 * It returns only a list of the services 1065 * It returns NULL on failure. 1066 */ 1067 rpcblist * 1068 rpcb_getmaps(const struct netconfig *nconf, const char *host) 1069 { 1070 rpcblist_ptr head = NULL; 1071 CLIENT *client; 1072 enum clnt_stat clnt_st; 1073 rpcvers_t vers = 0; 1074 1075 client = getclnthandle(host, nconf, NULL); 1076 if (client == NULL) { 1077 return (head); 1078 } 1079 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1080 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1081 (char *)(void *)&head, tottimeout); 1082 if (clnt_st == RPC_SUCCESS) 1083 goto done; 1084 1085 if ((clnt_st != RPC_PROGVERSMISMATCH) && 1086 (clnt_st != RPC_PROGUNAVAIL)) { 1087 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1088 clnt_geterr(client, &rpc_createerr.cf_error); 1089 goto done; 1090 } 1091 1092 /* fall back to earlier version */ 1093 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1094 if (vers == RPCBVERS4) { 1095 vers = RPCBVERS; 1096 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1097 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1098 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1099 (char *)(void *)&head, tottimeout) == RPC_SUCCESS) 1100 goto done; 1101 } 1102 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1103 clnt_geterr(client, &rpc_createerr.cf_error); 1104 1105 done: 1106 CLNT_DESTROY(client); 1107 return (head); 1108 } 1109 1110 /* 1111 * rpcbinder remote-call-service interface. 1112 * This routine is used to call the rpcbind remote call service 1113 * which will look up a service program in the address maps, and then 1114 * remotely call that routine with the given parameters. This allows 1115 * programs to do a lookup and call in one step. 1116 */ 1117 enum clnt_stat 1118 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog, 1119 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp, 1120 xdrproc_t xdrres, caddr_t resp, struct timeval tout, 1121 const struct netbuf *addr_ptr) 1122 { 1123 CLIENT *client; 1124 enum clnt_stat stat; 1125 struct r_rpcb_rmtcallargs a; 1126 struct r_rpcb_rmtcallres r; 1127 rpcvers_t rpcb_vers; 1128 1129 stat = 0; 1130 client = getclnthandle(host, nconf, NULL); 1131 if (client == NULL) { 1132 return (RPC_FAILED); 1133 } 1134 /*LINTED const castaway*/ 1135 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout); 1136 a.prog = prog; 1137 a.vers = vers; 1138 a.proc = proc; 1139 a.args.args_val = argsp; 1140 a.xdr_args = xdrargs; 1141 r.addr = NULL; 1142 r.results.results_val = resp; 1143 r.xdr_res = xdrres; 1144 1145 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1146 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1147 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1148 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1149 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1150 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1151 struct netbuf *na; 1152 /*LINTED const castaway*/ 1153 na = uaddr2taddr((struct netconfig *) nconf, r.addr); 1154 if (!na) { 1155 stat = RPC_N2AXLATEFAILURE; 1156 /*LINTED const castaway*/ 1157 ((struct netbuf *) addr_ptr)->len = 0; 1158 goto error; 1159 } 1160 if (na->len > addr_ptr->maxlen) { 1161 /* Too long address */ 1162 stat = RPC_FAILED; /* XXX A better error no */ 1163 free(na->buf); 1164 free(na); 1165 /*LINTED const castaway*/ 1166 ((struct netbuf *) addr_ptr)->len = 0; 1167 goto error; 1168 } 1169 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1170 /*LINTED const castaway*/ 1171 ((struct netbuf *)addr_ptr)->len = na->len; 1172 free(na->buf); 1173 free(na); 1174 break; 1175 } else if ((stat != RPC_PROGVERSMISMATCH) && 1176 (stat != RPC_PROGUNAVAIL)) { 1177 goto error; 1178 } 1179 } 1180 error: 1181 CLNT_DESTROY(client); 1182 if (r.addr) 1183 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1184 return (stat); 1185 } 1186 1187 /* 1188 * Gets the time on the remote host. 1189 * Returns 1 if succeeds else 0. 1190 */ 1191 bool_t 1192 rpcb_gettime(const char *host, time_t *timep) 1193 { 1194 CLIENT *client = NULL; 1195 void *handle; 1196 struct netconfig *nconf; 1197 rpcvers_t vers; 1198 enum clnt_stat st; 1199 1200 1201 if ((host == NULL) || (host[0] == 0)) { 1202 time(timep); 1203 return (TRUE); 1204 } 1205 1206 if ((handle = __rpc_setconf("netpath")) == NULL) { 1207 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1208 return (FALSE); 1209 } 1210 rpc_createerr.cf_stat = RPC_SUCCESS; 1211 while (client == NULL) { 1212 if ((nconf = __rpc_getconf(handle)) == NULL) { 1213 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1214 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1215 break; 1216 } 1217 client = getclnthandle(host, nconf, NULL); 1218 if (client) 1219 break; 1220 } 1221 __rpc_endconf(handle); 1222 if (client == NULL) { 1223 return (FALSE); 1224 } 1225 1226 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1227 (xdrproc_t) xdr_void, NULL, 1228 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1229 1230 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1231 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1232 if (vers == RPCBVERS4) { 1233 /* fall back to earlier version */ 1234 vers = RPCBVERS; 1235 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1236 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1237 (xdrproc_t) xdr_void, NULL, 1238 (xdrproc_t) xdr_int, (char *)(void *)timep, 1239 tottimeout); 1240 } 1241 } 1242 CLNT_DESTROY(client); 1243 return (st == RPC_SUCCESS); 1244 } 1245 1246 /* 1247 * Converts taddr to universal address. This routine should never 1248 * really be called because local n2a libraries are always provided. 1249 */ 1250 char * 1251 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr) 1252 { 1253 CLIENT *client; 1254 char *uaddr = NULL; 1255 1256 1257 /* parameter checking */ 1258 if (nconf == NULL) { 1259 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1260 return (NULL); 1261 } 1262 if (taddr == NULL) { 1263 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1264 return (NULL); 1265 } 1266 client = local_rpcb(); 1267 if (! client) { 1268 return (NULL); 1269 } 1270 1271 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1272 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1273 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout); 1274 CLNT_DESTROY(client); 1275 return (uaddr); 1276 } 1277 1278 /* 1279 * Converts universal address to netbuf. This routine should never 1280 * really be called because local n2a libraries are always provided. 1281 */ 1282 struct netbuf * 1283 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr) 1284 { 1285 CLIENT *client; 1286 struct netbuf *taddr; 1287 1288 1289 /* parameter checking */ 1290 if (nconf == NULL) { 1291 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1292 return (NULL); 1293 } 1294 if (uaddr == NULL) { 1295 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1296 return (NULL); 1297 } 1298 client = local_rpcb(); 1299 if (! client) { 1300 return (NULL); 1301 } 1302 1303 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1304 if (taddr == NULL) { 1305 CLNT_DESTROY(client); 1306 return (NULL); 1307 } 1308 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1309 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1310 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1311 tottimeout) != RPC_SUCCESS) { 1312 free(taddr); 1313 taddr = NULL; 1314 } 1315 CLNT_DESTROY(client); 1316 return (taddr); 1317 } 1318