1/* $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $ */ 2 3/*- 4 * Copyright (c) 2010, Oracle America, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of the "Oracle America, Inc." nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */ 32 33 34#if defined(LIBC_SCCS) && !defined(lint) 35static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro"; 36#endif 37#include <sys/cdefs.h> 38__FBSDID("$FreeBSD: stable/10/lib/libc/rpc/rpcb_clnt.c 320325 2017-06-25 05:46:03Z delphij $"); 39 40/* 41 * rpcb_clnt.c 42 * interface to rpcbind rpc service. 43 */ 44 45#include "namespace.h" 46#include "reentrant.h" 47#include <sys/types.h> 48#include <sys/socket.h> 49#include <sys/un.h> 50#include <sys/utsname.h> 51#include <rpc/rpc.h> 52#include <rpc/rpcb_prot.h> 53#include <rpc/nettype.h> 54#include <netconfig.h> 55#ifdef PORTMAP 56#include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */ 57#include <rpc/pmap_prot.h> 58#endif /* PORTMAP */ 59#include <stdio.h> 60#include <errno.h> 61#include <stdlib.h> 62#include <string.h> 63#include <unistd.h> 64#include <netdb.h> 65#include <syslog.h> 66#include "un-namespace.h" 67 68#include "rpc_com.h" 69#include "mt_misc.h" 70 71static struct timeval tottimeout = { 60, 0 }; 72static const struct timeval rmttimeout = { 3, 0 }; 73static struct timeval rpcbrmttime = { 15, 0 }; 74 75extern bool_t xdr_wrapstring(XDR *, char **); 76 77static const char nullstring[] = "\000"; 78 79#define CACHESIZE 6 80 81struct address_cache { 82 char *ac_host; 83 char *ac_netid; 84 char *ac_uaddr; 85 struct netbuf *ac_taddr; 86 struct address_cache *ac_next; 87}; 88 89static struct address_cache *front; 90static int cachesize; 91 92#define CLCR_GET_RPCB_TIMEOUT 1 93#define CLCR_SET_RPCB_TIMEOUT 2 94 95 96extern int __rpc_lowvers; 97 98static struct address_cache *check_cache(const char *, const char *); 99static void delete_cache(struct netbuf *); 100static void add_cache(const char *, const char *, struct netbuf *, char *); 101static CLIENT *getclnthandle(const char *, const struct netconfig *, char **); 102static CLIENT *local_rpcb(void); 103static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *); 104 105/* 106 * This routine adjusts the timeout used for calls to the remote rpcbind. 107 * Also, this routine can be used to set the use of portmapper version 2 108 * only when doing rpc_broadcasts 109 * These are private routines that may not be provided in future releases. 110 */ 111bool_t 112__rpc_control(int request, void *info) 113{ 114 switch (request) { 115 case CLCR_GET_RPCB_TIMEOUT: 116 *(struct timeval *)info = tottimeout; 117 break; 118 case CLCR_SET_RPCB_TIMEOUT: 119 tottimeout = *(struct timeval *)info; 120 break; 121 case CLCR_SET_LOWVERS: 122 __rpc_lowvers = *(int *)info; 123 break; 124 case CLCR_GET_LOWVERS: 125 *(int *)info = __rpc_lowvers; 126 break; 127 default: 128 return (FALSE); 129 } 130 return (TRUE); 131} 132 133/* 134 * It might seem that a reader/writer lock would be more reasonable here. 135 * However because getclnthandle(), the only user of the cache functions, 136 * may do a delete_cache() operation if a check_cache() fails to return an 137 * address useful to clnt_tli_create(), we may as well use a mutex. 138 */ 139/* 140 * As it turns out, if the cache lock is *not* a reader/writer lock, we will 141 * block all clnt_create's if we are trying to connect to a host that's down, 142 * since the lock will be held all during that time. 143 */ 144 145/* 146 * The routines check_cache(), add_cache(), delete_cache() manage the 147 * cache of rpcbind addresses for (host, netid). 148 */ 149 150static struct address_cache * 151check_cache(const char *host, const char *netid) 152{ 153 struct address_cache *cptr; 154 155 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 156 157 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 158 if (!strcmp(cptr->ac_host, host) && 159 !strcmp(cptr->ac_netid, netid)) { 160#ifdef ND_DEBUG 161 fprintf(stderr, "Found cache entry for %s: %s\n", 162 host, netid); 163#endif 164 return (cptr); 165 } 166 } 167 return ((struct address_cache *) NULL); 168} 169 170static void 171delete_cache(struct netbuf *addr) 172{ 173 struct address_cache *cptr, *prevptr = NULL; 174 175 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 176 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 177 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) { 178 free(cptr->ac_host); 179 free(cptr->ac_netid); 180 free(cptr->ac_taddr->buf); 181 free(cptr->ac_taddr); 182 free(cptr->ac_uaddr); 183 if (prevptr) 184 prevptr->ac_next = cptr->ac_next; 185 else 186 front = cptr->ac_next; 187 free(cptr); 188 cachesize--; 189 break; 190 } 191 prevptr = cptr; 192 } 193} 194 195static void 196add_cache(const char *host, const char *netid, struct netbuf *taddr, 197 char *uaddr) 198{ 199 struct address_cache *ad_cache, *cptr, *prevptr; 200 201 ad_cache = (struct address_cache *) 202 malloc(sizeof (struct address_cache)); 203 if (!ad_cache) { 204 return; 205 } 206 ad_cache->ac_host = strdup(host); 207 ad_cache->ac_netid = strdup(netid); 208 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL; 209 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf)); 210 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr || 211 (uaddr && !ad_cache->ac_uaddr)) { 212 goto out; 213 } 214 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len; 215 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len); 216 if (ad_cache->ac_taddr->buf == NULL) { 217out: 218 free(ad_cache->ac_host); 219 free(ad_cache->ac_netid); 220 free(ad_cache->ac_uaddr); 221 free(ad_cache->ac_taddr); 222 free(ad_cache); 223 return; 224 } 225 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len); 226#ifdef ND_DEBUG 227 fprintf(stderr, "Added to cache: %s : %s\n", host, netid); 228#endif 229 230/* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */ 231 232 rwlock_wrlock(&rpcbaddr_cache_lock); 233 if (cachesize < CACHESIZE) { 234 ad_cache->ac_next = front; 235 front = ad_cache; 236 cachesize++; 237 } else { 238 /* Free the last entry */ 239 cptr = front; 240 prevptr = NULL; 241 while (cptr->ac_next) { 242 prevptr = cptr; 243 cptr = cptr->ac_next; 244 } 245 246#ifdef ND_DEBUG 247 fprintf(stderr, "Deleted from cache: %s : %s\n", 248 cptr->ac_host, cptr->ac_netid); 249#endif 250 free(cptr->ac_host); 251 free(cptr->ac_netid); 252 free(cptr->ac_taddr->buf); 253 free(cptr->ac_taddr); 254 free(cptr->ac_uaddr); 255 256 if (prevptr) { 257 prevptr->ac_next = NULL; 258 ad_cache->ac_next = front; 259 front = ad_cache; 260 } else { 261 front = ad_cache; 262 ad_cache->ac_next = NULL; 263 } 264 free(cptr); 265 } 266 rwlock_unlock(&rpcbaddr_cache_lock); 267} 268 269/* 270 * This routine will return a client handle that is connected to the 271 * rpcbind. If targaddr is non-NULL, the "universal address" of the 272 * host will be stored in *targaddr; the caller is responsible for 273 * freeing this string. 274 * On error, returns NULL and free's everything. 275 */ 276static CLIENT * 277getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr) 278{ 279 CLIENT *client; 280 struct netbuf *addr, taddr; 281 struct netbuf addr_to_delete; 282 struct __rpc_sockinfo si; 283 struct addrinfo hints, *res, *tres; 284 struct address_cache *ad_cache; 285 char *tmpaddr; 286 287/* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */ 288 289 /* Get the address of the rpcbind. Check cache first */ 290 client = NULL; 291 addr_to_delete.len = 0; 292 rwlock_rdlock(&rpcbaddr_cache_lock); 293 ad_cache = NULL; 294 if (host != NULL) 295 ad_cache = check_cache(host, nconf->nc_netid); 296 if (ad_cache != NULL) { 297 addr = ad_cache->ac_taddr; 298 client = clnt_tli_create(RPC_ANYFD, nconf, addr, 299 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 300 if (client != NULL) { 301 if (targaddr) 302 *targaddr = strdup(ad_cache->ac_uaddr); 303 rwlock_unlock(&rpcbaddr_cache_lock); 304 return (client); 305 } 306 addr_to_delete.len = addr->len; 307 addr_to_delete.buf = (char *)malloc(addr->len); 308 if (addr_to_delete.buf == NULL) { 309 addr_to_delete.len = 0; 310 } else { 311 memcpy(addr_to_delete.buf, addr->buf, addr->len); 312 } 313 } 314 rwlock_unlock(&rpcbaddr_cache_lock); 315 if (addr_to_delete.len != 0) { 316 /* 317 * Assume this may be due to cache data being 318 * outdated 319 */ 320 rwlock_wrlock(&rpcbaddr_cache_lock); 321 delete_cache(&addr_to_delete); 322 rwlock_unlock(&rpcbaddr_cache_lock); 323 free(addr_to_delete.buf); 324 } 325 if (!__rpc_nconf2sockinfo(nconf, &si)) { 326 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 327 return NULL; 328 } 329 330 memset(&hints, 0, sizeof hints); 331 hints.ai_family = si.si_af; 332 hints.ai_socktype = si.si_socktype; 333 hints.ai_protocol = si.si_proto; 334 335#ifdef CLNT_DEBUG 336 printf("trying netid %s family %d proto %d socktype %d\n", 337 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype); 338#endif 339 340 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 341 client = local_rpcb(); 342 if (! client) { 343#ifdef ND_DEBUG 344 clnt_pcreateerror("rpcbind clnt interface"); 345#endif 346 return (NULL); 347 } else { 348 struct sockaddr_un sun; 349 if (targaddr) { 350 *targaddr = malloc(sizeof(sun.sun_path)); 351 if (*targaddr == NULL) { 352 CLNT_DESTROY(client); 353 return (NULL); 354 } 355 strncpy(*targaddr, _PATH_RPCBINDSOCK, 356 sizeof(sun.sun_path)); 357 } 358 return (client); 359 } 360 } else { 361 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) { 362 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 363 return NULL; 364 } 365 } 366 367 for (tres = res; tres != NULL; tres = tres->ai_next) { 368 taddr.buf = tres->ai_addr; 369 taddr.len = taddr.maxlen = tres->ai_addrlen; 370 371#ifdef ND_DEBUG 372 { 373 char *ua; 374 375 ua = taddr2uaddr(nconf, &taddr); 376 fprintf(stderr, "Got it [%s]\n", ua); 377 free(ua); 378 } 379#endif 380 381#ifdef ND_DEBUG 382 { 383 int i; 384 385 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n", 386 taddr.len, taddr.maxlen); 387 fprintf(stderr, "\tAddress is "); 388 for (i = 0; i < taddr.len; i++) 389 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]); 390 fprintf(stderr, "\n"); 391 } 392#endif 393 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr, 394 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 395#ifdef ND_DEBUG 396 if (! client) { 397 clnt_pcreateerror("rpcbind clnt interface"); 398 } 399#endif 400 401 if (client) { 402 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL; 403 add_cache(host, nconf->nc_netid, &taddr, tmpaddr); 404 if (targaddr) 405 *targaddr = tmpaddr; 406 break; 407 } 408 } 409 if (res) 410 freeaddrinfo(res); 411 return (client); 412} 413 414/* XXX */ 415#define IN4_LOCALHOST_STRING "127.0.0.1" 416#define IN6_LOCALHOST_STRING "::1" 417 418/* 419 * This routine will return a client handle that is connected to the local 420 * rpcbind. Returns NULL on error and free's everything. 421 */ 422static CLIENT * 423local_rpcb(void) 424{ 425 CLIENT *client; 426 static struct netconfig *loopnconf; 427 static char *hostname; 428 int sock; 429 size_t tsize; 430 struct netbuf nbuf; 431 struct sockaddr_un sun; 432 433 /* 434 * Try connecting to the local rpcbind through a local socket 435 * first. If this doesn't work, try all transports defined in 436 * the netconfig file. 437 */ 438 memset(&sun, 0, sizeof sun); 439 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 440 if (sock < 0) 441 goto try_nconf; 442 sun.sun_family = AF_LOCAL; 443 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 444 nbuf.len = sun.sun_len = SUN_LEN(&sun); 445 nbuf.maxlen = sizeof (struct sockaddr_un); 446 nbuf.buf = &sun; 447 448 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0); 449 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG, 450 (rpcvers_t)RPCBVERS, tsize, tsize); 451 452 if (client != NULL) { 453 /* Mark the socket to be closed in destructor */ 454 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL); 455 return client; 456 } 457 458 /* Nobody needs this socket anymore; free the descriptor. */ 459 _close(sock); 460 461try_nconf: 462 463/* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */ 464 mutex_lock(&loopnconf_lock); 465 if (loopnconf == NULL) { 466 struct netconfig *nconf, *tmpnconf = NULL; 467 void *nc_handle; 468 int fd; 469 470 nc_handle = setnetconfig(); 471 if (nc_handle == NULL) { 472 /* fails to open netconfig file */ 473 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 474 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 475 mutex_unlock(&loopnconf_lock); 476 return (NULL); 477 } 478 while ((nconf = getnetconfig(nc_handle)) != NULL) { 479#ifdef INET6 480 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 || 481#else 482 if (( 483#endif 484 strcmp(nconf->nc_protofmly, NC_INET) == 0) && 485 (nconf->nc_semantics == NC_TPI_COTS || 486 nconf->nc_semantics == NC_TPI_COTS_ORD)) { 487 fd = __rpc_nconf2fd(nconf); 488 /* 489 * Can't create a socket, assume that 490 * this family isn't configured in the kernel. 491 */ 492 if (fd < 0) 493 continue; 494 _close(fd); 495 tmpnconf = nconf; 496 if (!strcmp(nconf->nc_protofmly, NC_INET)) 497 hostname = IN4_LOCALHOST_STRING; 498 else 499 hostname = IN6_LOCALHOST_STRING; 500 } 501 } 502 if (tmpnconf == NULL) { 503 endnetconfig(nc_handle); 504 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 505 mutex_unlock(&loopnconf_lock); 506 return (NULL); 507 } 508 loopnconf = getnetconfigent(tmpnconf->nc_netid); 509 /* loopnconf is never freed */ 510 endnetconfig(nc_handle); 511 } 512 mutex_unlock(&loopnconf_lock); 513 client = getclnthandle(hostname, loopnconf, NULL); 514 return (client); 515} 516 517/* 518 * Set a mapping between program, version and address. 519 * Calls the rpcbind service to do the mapping. 520 * 521 * nconf - Network structure of transport 522 * address - Services netconfig address 523 */ 524bool_t 525rpcb_set(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf, 526 const struct netbuf *address) 527{ 528 CLIENT *client; 529 bool_t rslt = FALSE; 530 RPCB parms; 531 char uidbuf[32]; 532 533 /* parameter checking */ 534 if (nconf == NULL) { 535 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 536 return (FALSE); 537 } 538 if (address == NULL) { 539 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 540 return (FALSE); 541 } 542 client = local_rpcb(); 543 if (! client) { 544 return (FALSE); 545 } 546 547 /* convert to universal */ 548 /*LINTED const castaway*/ 549 parms.r_addr = taddr2uaddr((struct netconfig *) nconf, 550 (struct netbuf *)address); 551 if (!parms.r_addr) { 552 CLNT_DESTROY(client); 553 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 554 return (FALSE); /* no universal address */ 555 } 556 parms.r_prog = program; 557 parms.r_vers = version; 558 parms.r_netid = nconf->nc_netid; 559 /* 560 * Though uid is not being used directly, we still send it for 561 * completeness. For non-unix platforms, perhaps some other 562 * string or an empty string can be sent. 563 */ 564 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 565 parms.r_owner = uidbuf; 566 567 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb, 568 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 569 (char *)(void *)&rslt, tottimeout); 570 571 CLNT_DESTROY(client); 572 free(parms.r_addr); 573 return (rslt); 574} 575 576/* 577 * Remove the mapping between program, version and netbuf address. 578 * Calls the rpcbind service to do the un-mapping. 579 * If netbuf is NULL, unset for all the transports, otherwise unset 580 * only for the given transport. 581 */ 582bool_t 583rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf) 584{ 585 CLIENT *client; 586 bool_t rslt = FALSE; 587 RPCB parms; 588 char uidbuf[32]; 589 590 client = local_rpcb(); 591 if (! client) { 592 return (FALSE); 593 } 594 595 parms.r_prog = program; 596 parms.r_vers = version; 597 if (nconf) 598 parms.r_netid = nconf->nc_netid; 599 else { 600 /*LINTED const castaway*/ 601 parms.r_netid = (char *) &nullstring[0]; /* unsets all */ 602 } 603 /*LINTED const castaway*/ 604 parms.r_addr = (char *) &nullstring[0]; 605 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 606 parms.r_owner = uidbuf; 607 608 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb, 609 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 610 (char *)(void *)&rslt, tottimeout); 611 612 CLNT_DESTROY(client); 613 return (rslt); 614} 615 616/* 617 * From the merged list, find the appropriate entry 618 */ 619static struct netbuf * 620got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf) 621{ 622 struct netbuf *na = NULL; 623 rpcb_entry_list_ptr sp; 624 rpcb_entry *rmap; 625 626 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) { 627 rmap = &sp->rpcb_entry_map; 628 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) && 629 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) && 630 (nconf->nc_semantics == rmap->r_nc_semantics) && 631 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) { 632 na = uaddr2taddr(nconf, rmap->r_maddr); 633#ifdef ND_DEBUG 634 fprintf(stderr, "\tRemote address is [%s].\n", 635 rmap->r_maddr); 636 if (!na) 637 fprintf(stderr, 638 "\tCouldn't resolve remote address!\n"); 639#endif 640 break; 641 } 642 } 643 return (na); 644} 645 646/* 647 * Quick check to see if rpcbind is up. Tries to connect over 648 * local transport. 649 */ 650static bool_t 651__rpcbind_is_up(void) 652{ 653 struct netconfig *nconf; 654 struct sockaddr_un sun; 655 void *localhandle; 656 int sock; 657 658 nconf = NULL; 659 localhandle = setnetconfig(); 660 while ((nconf = getnetconfig(localhandle)) != NULL) { 661 if (nconf->nc_protofmly != NULL && 662 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 663 break; 664 } 665 endnetconfig(localhandle); 666 667 if (nconf == NULL) 668 return (FALSE); 669 670 memset(&sun, 0, sizeof sun); 671 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 672 if (sock < 0) 673 return (FALSE); 674 sun.sun_family = AF_LOCAL; 675 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path)); 676 sun.sun_len = SUN_LEN(&sun); 677 678 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) { 679 _close(sock); 680 return (FALSE); 681 } 682 683 _close(sock); 684 return (TRUE); 685} 686 687/* 688 * An internal function which optimizes rpcb_getaddr function. It also 689 * returns the client handle that it uses to contact the remote rpcbind. 690 * 691 * The algorithm used: If the transports is TCP or UDP, it first tries 692 * version 2 (portmap), 4 and then 3 (svr4). This order should be 693 * changed in the next OS release to 4, 2 and 3. We are assuming that by 694 * that time, version 4 would be available on many machines on the network. 695 * With this algorithm, we get performance as well as a plan for 696 * obsoleting version 2. 697 * 698 * For all other transports, the algorithm remains as 4 and then 3. 699 * 700 * XXX: Due to some problems with t_connect(), we do not reuse the same client 701 * handle for COTS cases and hence in these cases we do not return the 702 * client handle. This code will change if t_connect() ever 703 * starts working properly. Also look under clnt_vc.c. 704 */ 705struct netbuf * 706__rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version, 707 const struct netconfig *nconf, const char *host, 708 CLIENT **clpp, struct timeval *tp) 709{ 710 static bool_t check_rpcbind = TRUE; 711 CLIENT *client = NULL; 712 RPCB parms; 713 enum clnt_stat clnt_st; 714 char *ua = NULL; 715 rpcvers_t vers; 716 struct netbuf *address = NULL; 717 rpcvers_t start_vers = RPCBVERS4; 718 struct netbuf servaddr; 719 720 /* parameter checking */ 721 if (nconf == NULL) { 722 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 723 return (NULL); 724 } 725 726 parms.r_addr = NULL; 727 728 /* 729 * Use default total timeout if no timeout is specified. 730 */ 731 if (tp == NULL) 732 tp = &tottimeout; 733 734#ifdef PORTMAP 735 /* Try version 2 for TCP or UDP */ 736 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 737 u_short port = 0; 738 struct netbuf remote; 739 rpcvers_t pmapvers = 2; 740 struct pmap pmapparms; 741 742 /* 743 * Try UDP only - there are some portmappers out 744 * there that use UDP only. 745 */ 746 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 747 struct netconfig *newnconf; 748 749 if ((newnconf = getnetconfigent("udp")) == NULL) { 750 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 751 return (NULL); 752 } 753 client = getclnthandle(host, newnconf, &parms.r_addr); 754 freenetconfigent(newnconf); 755 } else { 756 client = getclnthandle(host, nconf, &parms.r_addr); 757 } 758 if (client == NULL) 759 return (NULL); 760 761 /* 762 * Set version and retry timeout. 763 */ 764 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 765 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers); 766 767 pmapparms.pm_prog = program; 768 pmapparms.pm_vers = version; 769 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 770 IPPROTO_UDP : IPPROTO_TCP; 771 pmapparms.pm_port = 0; /* not needed */ 772 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 773 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 774 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 775 *tp); 776 if (clnt_st != RPC_SUCCESS) { 777 if ((clnt_st == RPC_PROGVERSMISMATCH) || 778 (clnt_st == RPC_PROGUNAVAIL)) 779 goto try_rpcbind; /* Try different versions */ 780 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 781 clnt_geterr(client, &rpc_createerr.cf_error); 782 goto error; 783 } else if (port == 0) { 784 address = NULL; 785 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 786 goto error; 787 } 788 port = htons(port); 789 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote); 790 if (((address = (struct netbuf *) 791 malloc(sizeof (struct netbuf))) == NULL) || 792 ((address->buf = (char *) 793 malloc(remote.len)) == NULL)) { 794 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 795 clnt_geterr(client, &rpc_createerr.cf_error); 796 free(address); 797 address = NULL; 798 goto error; 799 } 800 memcpy(address->buf, remote.buf, remote.len); 801 memcpy(&((char *)address->buf)[sizeof (short)], 802 (char *)(void *)&port, sizeof (short)); 803 address->len = address->maxlen = remote.len; 804 goto done; 805 } 806#endif /* PORTMAP */ 807 808try_rpcbind: 809 /* 810 * Check if rpcbind is up. This prevents needless delays when 811 * accessing applications such as the keyserver while booting 812 * disklessly. 813 */ 814 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 815 if (!__rpcbind_is_up()) { 816 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 817 rpc_createerr.cf_error.re_errno = 0; 818 goto error; 819 } 820 check_rpcbind = FALSE; 821 } 822 823 /* 824 * Now we try version 4 and then 3. 825 * We also send the remote system the address we used to 826 * contact it in case it can help to connect back with us 827 */ 828 parms.r_prog = program; 829 parms.r_vers = version; 830 /*LINTED const castaway*/ 831 parms.r_owner = (char *) &nullstring[0]; /* not needed; */ 832 /* just for xdring */ 833 parms.r_netid = nconf->nc_netid; /* not really needed */ 834 835 /* 836 * If a COTS transport is being used, try getting address via CLTS 837 * transport. This works only with version 4. 838 */ 839 if (nconf->nc_semantics == NC_TPI_COTS_ORD || 840 nconf->nc_semantics == NC_TPI_COTS) { 841 842 void *handle; 843 struct netconfig *nconf_clts; 844 rpcb_entry_list_ptr relp = NULL; 845 846 if (client == NULL) { 847 /* This did not go through the above PORTMAP/TCP code */ 848 if ((handle = __rpc_setconf("datagram_v")) != NULL) { 849 while ((nconf_clts = __rpc_getconf(handle)) 850 != NULL) { 851 if (strcmp(nconf_clts->nc_protofmly, 852 nconf->nc_protofmly) != 0) { 853 continue; 854 } 855 client = getclnthandle(host, nconf_clts, 856 &parms.r_addr); 857 break; 858 } 859 __rpc_endconf(handle); 860 } 861 if (client == NULL) 862 goto regular_rpcbind; /* Go the regular way */ 863 } else { 864 /* This is a UDP PORTMAP handle. Change to version 4 */ 865 vers = RPCBVERS4; 866 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 867 } 868 /* 869 * We also send the remote system the address we used to 870 * contact it in case it can help it connect back with us 871 */ 872 if (parms.r_addr == NULL) { 873 /*LINTED const castaway*/ 874 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */ 875 } 876 877 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 878 879 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST, 880 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 881 (xdrproc_t) xdr_rpcb_entry_list_ptr, 882 (char *)(void *)&relp, *tp); 883 if (clnt_st == RPC_SUCCESS) { 884 if ((address = got_entry(relp, nconf)) != NULL) { 885 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 886 (char *)(void *)&relp); 887 CLNT_CONTROL(client, CLGET_SVC_ADDR, 888 (char *)(void *)&servaddr); 889 __rpc_fixup_addr(address, &servaddr); 890 goto done; 891 } 892 /* Entry not found for this transport */ 893 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 894 (char *)(void *)&relp); 895 /* 896 * XXX: should have perhaps returned with error but 897 * since the remote machine might not always be able 898 * to send the address on all transports, we try the 899 * regular way with regular_rpcbind 900 */ 901 goto regular_rpcbind; 902 } else if ((clnt_st == RPC_PROGVERSMISMATCH) || 903 (clnt_st == RPC_PROGUNAVAIL)) { 904 start_vers = RPCBVERS; /* Try version 3 now */ 905 goto regular_rpcbind; /* Try different versions */ 906 } else { 907 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 908 clnt_geterr(client, &rpc_createerr.cf_error); 909 goto error; 910 } 911 } 912 913regular_rpcbind: 914 915 /* Now the same transport is to be used to get the address */ 916 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) || 917 (nconf->nc_semantics == NC_TPI_COTS))) { 918 /* A CLTS type of client - destroy it */ 919 CLNT_DESTROY(client); 920 client = NULL; 921 } 922 923 if (client == NULL) { 924 client = getclnthandle(host, nconf, &parms.r_addr); 925 if (client == NULL) { 926 goto error; 927 } 928 } 929 if (parms.r_addr == NULL) { 930 /*LINTED const castaway*/ 931 parms.r_addr = (char *) &nullstring[0]; 932 } 933 934 /* First try from start_vers and then version 3 (RPCBVERS) */ 935 936 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime); 937 for (vers = start_vers; vers >= RPCBVERS; vers--) { 938 /* Set the version */ 939 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 940 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR, 941 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 942 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp); 943 if (clnt_st == RPC_SUCCESS) { 944 if ((ua == NULL) || (ua[0] == 0)) { 945 /* address unknown */ 946 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 947 goto error; 948 } 949 address = uaddr2taddr(nconf, ua); 950#ifdef ND_DEBUG 951 fprintf(stderr, "\tRemote address is [%s]\n", ua); 952 if (!address) 953 fprintf(stderr, 954 "\tCouldn't resolve remote address!\n"); 955#endif 956 xdr_free((xdrproc_t)xdr_wrapstring, 957 (char *)(void *)&ua); 958 959 if (! address) { 960 /* We don't know about your universal address */ 961 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 962 goto error; 963 } 964 CLNT_CONTROL(client, CLGET_SVC_ADDR, 965 (char *)(void *)&servaddr); 966 __rpc_fixup_addr(address, &servaddr); 967 goto done; 968 } else if (clnt_st == RPC_PROGVERSMISMATCH) { 969 struct rpc_err rpcerr; 970 971 clnt_geterr(client, &rpcerr); 972 if (rpcerr.re_vers.low > RPCBVERS4) 973 goto error; /* a new version, can't handle */ 974 } else if (clnt_st != RPC_PROGUNAVAIL) { 975 /* Cant handle this error */ 976 rpc_createerr.cf_stat = clnt_st; 977 clnt_geterr(client, &rpc_createerr.cf_error); 978 goto error; 979 } 980 } 981 982error: 983 if (client) { 984 CLNT_DESTROY(client); 985 client = NULL; 986 } 987done: 988 if (nconf->nc_semantics != NC_TPI_CLTS) { 989 /* This client is the connectionless one */ 990 if (client) { 991 CLNT_DESTROY(client); 992 client = NULL; 993 } 994 } 995 if (clpp) { 996 *clpp = client; 997 } else if (client) { 998 CLNT_DESTROY(client); 999 } 1000 if (parms.r_addr != NULL && parms.r_addr != nullstring) 1001 free(parms.r_addr); 1002 return (address); 1003} 1004 1005 1006/* 1007 * Find the mapped address for program, version. 1008 * Calls the rpcbind service remotely to do the lookup. 1009 * Uses the transport specified in nconf. 1010 * Returns FALSE (0) if no map exists, else returns 1. 1011 * 1012 * Assuming that the address is all properly allocated 1013 */ 1014bool_t 1015rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf, 1016 struct netbuf *address, const char *host) 1017{ 1018 struct netbuf *na; 1019 1020 if ((na = __rpcb_findaddr_timed(program, version, 1021 (struct netconfig *) nconf, (char *) host, 1022 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL) 1023 return (FALSE); 1024 1025 if (na->len > address->maxlen) { 1026 /* Too long address */ 1027 free(na->buf); 1028 free(na); 1029 rpc_createerr.cf_stat = RPC_FAILED; 1030 return (FALSE); 1031 } 1032 memcpy(address->buf, na->buf, (size_t)na->len); 1033 address->len = na->len; 1034 free(na->buf); 1035 free(na); 1036 return (TRUE); 1037} 1038 1039/* 1040 * Get a copy of the current maps. 1041 * Calls the rpcbind service remotely to get the maps. 1042 * 1043 * It returns only a list of the services 1044 * It returns NULL on failure. 1045 */ 1046rpcblist * 1047rpcb_getmaps(const struct netconfig *nconf, const char *host) 1048{ 1049 rpcblist_ptr head = NULL; 1050 CLIENT *client; 1051 enum clnt_stat clnt_st; 1052 rpcvers_t vers = 0; 1053 1054 client = getclnthandle(host, nconf, NULL); 1055 if (client == NULL) { 1056 return (head); 1057 } 1058 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1059 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1060 (char *)(void *)&head, tottimeout); 1061 if (clnt_st == RPC_SUCCESS) 1062 goto done; 1063 1064 if ((clnt_st != RPC_PROGVERSMISMATCH) && 1065 (clnt_st != RPC_PROGUNAVAIL)) { 1066 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1067 clnt_geterr(client, &rpc_createerr.cf_error); 1068 goto done; 1069 } 1070 1071 /* fall back to earlier version */ 1072 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1073 if (vers == RPCBVERS4) { 1074 vers = RPCBVERS; 1075 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1076 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1077 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1078 (char *)(void *)&head, tottimeout) == RPC_SUCCESS) 1079 goto done; 1080 } 1081 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1082 clnt_geterr(client, &rpc_createerr.cf_error); 1083 1084done: 1085 CLNT_DESTROY(client); 1086 return (head); 1087} 1088 1089/* 1090 * rpcbinder remote-call-service interface. 1091 * This routine is used to call the rpcbind remote call service 1092 * which will look up a service program in the address maps, and then 1093 * remotely call that routine with the given parameters. This allows 1094 * programs to do a lookup and call in one step. 1095 * 1096 * nconf -Netconfig structure 1097 * host - Remote host name 1098 * proc - Remote proc identifiers 1099 * xdrargs, xdrres; XDR routines 1100 * argsp, resp - Argument and Result 1101 * tout - Timeout value for this call 1102 * addr_ptr - Preallocated netbuf address 1103 */ 1104enum clnt_stat 1105rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog, 1106 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp, 1107 xdrproc_t xdrres, caddr_t resp, struct timeval tout, 1108 const struct netbuf *addr_ptr) 1109{ 1110 CLIENT *client; 1111 enum clnt_stat stat; 1112 struct r_rpcb_rmtcallargs a; 1113 struct r_rpcb_rmtcallres r; 1114 rpcvers_t rpcb_vers; 1115 1116 stat = 0; 1117 client = getclnthandle(host, nconf, NULL); 1118 if (client == NULL) { 1119 return (RPC_FAILED); 1120 } 1121 /*LINTED const castaway*/ 1122 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout); 1123 a.prog = prog; 1124 a.vers = vers; 1125 a.proc = proc; 1126 a.args.args_val = argsp; 1127 a.xdr_args = xdrargs; 1128 r.addr = NULL; 1129 r.results.results_val = resp; 1130 r.xdr_res = xdrres; 1131 1132 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1133 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1134 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1135 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1136 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1137 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1138 struct netbuf *na; 1139 /*LINTED const castaway*/ 1140 na = uaddr2taddr((struct netconfig *) nconf, r.addr); 1141 if (!na) { 1142 stat = RPC_N2AXLATEFAILURE; 1143 /*LINTED const castaway*/ 1144 ((struct netbuf *) addr_ptr)->len = 0; 1145 goto error; 1146 } 1147 if (na->len > addr_ptr->maxlen) { 1148 /* Too long address */ 1149 stat = RPC_FAILED; /* XXX A better error no */ 1150 free(na->buf); 1151 free(na); 1152 /*LINTED const castaway*/ 1153 ((struct netbuf *) addr_ptr)->len = 0; 1154 goto error; 1155 } 1156 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1157 /*LINTED const castaway*/ 1158 ((struct netbuf *)addr_ptr)->len = na->len; 1159 free(na->buf); 1160 free(na); 1161 break; 1162 } else if ((stat != RPC_PROGVERSMISMATCH) && 1163 (stat != RPC_PROGUNAVAIL)) { 1164 goto error; 1165 } 1166 } 1167error: 1168 CLNT_DESTROY(client); 1169 if (r.addr) 1170 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1171 return (stat); 1172} 1173 1174/* 1175 * Gets the time on the remote host. 1176 * Returns 1 if succeeds else 0. 1177 */ 1178bool_t 1179rpcb_gettime(const char *host, time_t *timep) 1180{ 1181 CLIENT *client = NULL; 1182 void *handle; 1183 struct netconfig *nconf; 1184 rpcvers_t vers; 1185 enum clnt_stat st; 1186 1187 1188 if ((host == NULL) || (host[0] == 0)) { 1189 time(timep); 1190 return (TRUE); 1191 } 1192 1193 if ((handle = __rpc_setconf("netpath")) == NULL) { 1194 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1195 return (FALSE); 1196 } 1197 rpc_createerr.cf_stat = RPC_SUCCESS; 1198 while (client == NULL) { 1199 if ((nconf = __rpc_getconf(handle)) == NULL) { 1200 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1201 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1202 break; 1203 } 1204 client = getclnthandle(host, nconf, NULL); 1205 if (client) 1206 break; 1207 } 1208 __rpc_endconf(handle); 1209 if (client == (CLIENT *) NULL) { 1210 return (FALSE); 1211 } 1212 1213 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1214 (xdrproc_t) xdr_void, NULL, 1215 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1216 1217 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1218 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1219 if (vers == RPCBVERS4) { 1220 /* fall back to earlier version */ 1221 vers = RPCBVERS; 1222 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1223 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1224 (xdrproc_t) xdr_void, NULL, 1225 (xdrproc_t) xdr_int, (char *)(void *)timep, 1226 tottimeout); 1227 } 1228 } 1229 CLNT_DESTROY(client); 1230 return (st == RPC_SUCCESS? TRUE: FALSE); 1231} 1232 1233/* 1234 * Converts taddr to universal address. This routine should never 1235 * really be called because local n2a libraries are always provided. 1236 */ 1237char * 1238rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr) 1239{ 1240 CLIENT *client; 1241 char *uaddr = NULL; 1242 1243 1244 /* parameter checking */ 1245 if (nconf == NULL) { 1246 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1247 return (NULL); 1248 } 1249 if (taddr == NULL) { 1250 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1251 return (NULL); 1252 } 1253 client = local_rpcb(); 1254 if (! client) { 1255 return (NULL); 1256 } 1257 1258 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1259 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1260 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout); 1261 CLNT_DESTROY(client); 1262 return (uaddr); 1263} 1264 1265/* 1266 * Converts universal address to netbuf. This routine should never 1267 * really be called because local n2a libraries are always provided. 1268 */ 1269struct netbuf * 1270rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr) 1271{ 1272 CLIENT *client; 1273 struct netbuf *taddr; 1274 1275 1276 /* parameter checking */ 1277 if (nconf == NULL) { 1278 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1279 return (NULL); 1280 } 1281 if (uaddr == NULL) { 1282 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1283 return (NULL); 1284 } 1285 client = local_rpcb(); 1286 if (! client) { 1287 return (NULL); 1288 } 1289 1290 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1291 if (taddr == NULL) { 1292 CLNT_DESTROY(client); 1293 return (NULL); 1294 } 1295 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1296 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1297 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1298 tottimeout) != RPC_SUCCESS) { 1299 free(taddr); 1300 taddr = NULL; 1301 } 1302 CLNT_DESTROY(client); 1303 return (taddr); 1304} 1305