1 /* $NetBSD: rpcb_clnt.c,v 1.31 2015/03/26 11:31:57 justin Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 /* 34 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 35 */ 36 37 /* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro"; 43 #else 44 __RCSID("$NetBSD: rpcb_clnt.c,v 1.31 2015/03/26 11:31:57 justin Exp $"); 45 #endif 46 #endif 47 48 /* 49 * rpcb_clnt.c 50 * interface to rpcbind rpc service. 51 * 52 * Copyright (C) 1988, Sun Microsystems, Inc. 53 */ 54 55 #include "namespace.h" 56 #include "reentrant.h" 57 #include <sys/types.h> 58 #include <sys/socket.h> 59 #include <sys/un.h> 60 #include <sys/utsname.h> 61 #include <rpc/rpc.h> 62 #include <rpc/rpcb_prot.h> 63 #include <rpc/nettype.h> 64 #include <netconfig.h> 65 #ifdef PORTMAP 66 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */ 67 #include <rpc/pmap_prot.h> 68 #endif 69 #include <assert.h> 70 #include <errno.h> 71 #include <netdb.h> 72 #include <stdio.h> 73 #include <stdlib.h> 74 #include <string.h> 75 #include <syslog.h> 76 #include <unistd.h> 77 78 #include "svc_fdset.h" 79 #include "rpc_internal.h" 80 81 #ifdef __weak_alias 82 __weak_alias(rpcb_set,_rpcb_set) 83 __weak_alias(rpcb_unset,_rpcb_unset) 84 __weak_alias(rpcb_getmaps,_rpcb_getmaps) 85 __weak_alias(rpcb_taddr2uaddr,_rpcb_taddr2uaddr) 86 __weak_alias(rpcb_uaddr2taddr,_rpcb_uaddr2taddr) 87 #endif 88 89 static struct timeval tottimeout = { 60, 0 }; 90 static const struct timeval rmttimeout = { 3, 0 }; 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 { 129 130 _DIAGASSERT(info != NULL); 131 132 switch (request) { 133 case CLCR_GET_RPCB_TIMEOUT: 134 *(struct timeval *)info = tottimeout; 135 break; 136 case CLCR_SET_RPCB_TIMEOUT: 137 tottimeout = *(struct timeval *)info; 138 break; 139 case CLCR_SET_LOWVERS: 140 __rpc_lowvers = *(int *)info; 141 break; 142 case CLCR_GET_LOWVERS: 143 *(int *)info = __rpc_lowvers; 144 break; 145 default: 146 return (FALSE); 147 } 148 return (TRUE); 149 } 150 151 /* 152 * It might seem that a reader/writer lock would be more reasonable here. 153 * However because getclnthandle(), the only user of the cache functions, 154 * may do a delete_cache() operation if a check_cache() fails to return an 155 * address useful to clnt_tli_create(), we may as well use a mutex. 156 */ 157 /* 158 * As it turns out, if the cache lock is *not* a reader/writer lock, we will 159 * block all clnt_create's if we are trying to connect to a host that's down, 160 * since the lock will be held all during that time. 161 */ 162 #ifdef _REENTRANT 163 extern rwlock_t rpcbaddr_cache_lock; 164 #endif 165 166 /* 167 * The routines check_cache(), add_cache(), delete_cache() manage the 168 * cache of rpcbind addresses for (host, netid). 169 */ 170 171 static struct address_cache * 172 check_cache(const char *host, const char *netid) 173 { 174 struct address_cache *cptr; 175 176 _DIAGASSERT(host != NULL); 177 _DIAGASSERT(netid != NULL); 178 179 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 180 181 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 182 if (!strcmp(cptr->ac_host, host) && 183 !strcmp(cptr->ac_netid, netid)) { 184 #ifdef ND_DEBUG 185 fprintf(stderr, "Found cache entry for %s: %s\n", 186 host, netid); 187 #endif 188 return (cptr); 189 } 190 } 191 return NULL; 192 } 193 194 static void 195 delete_cache(struct netbuf *addr) 196 { 197 struct address_cache *cptr, *prevptr = NULL; 198 199 _DIAGASSERT(addr != NULL); 200 201 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 202 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 203 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) { 204 free(cptr->ac_host); 205 free(cptr->ac_netid); 206 free(cptr->ac_taddr->buf); 207 free(cptr->ac_taddr); 208 if (cptr->ac_uaddr) 209 free(cptr->ac_uaddr); 210 if (prevptr) 211 prevptr->ac_next = cptr->ac_next; 212 else 213 front = cptr->ac_next; 214 free(cptr); 215 cachesize--; 216 break; 217 } 218 prevptr = cptr; 219 } 220 } 221 222 static void 223 add_cache(const char *host, const char *netid, struct netbuf *taddr, 224 char *uaddr) 225 { 226 struct address_cache *ad_cache, *cptr, *prevptr; 227 228 _DIAGASSERT(host != NULL); 229 _DIAGASSERT(netid != NULL); 230 /* uaddr may be NULL */ 231 /* taddr may be NULL ??? */ 232 233 ad_cache = malloc(sizeof(*ad_cache)); 234 if (!ad_cache) { 235 return; 236 } 237 ad_cache->ac_host = strdup(host); 238 ad_cache->ac_netid = strdup(netid); 239 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL; 240 ad_cache->ac_taddr = malloc(sizeof(*ad_cache->ac_taddr)); 241 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr || 242 (uaddr && !ad_cache->ac_uaddr)) { 243 goto out; 244 } 245 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len; 246 ad_cache->ac_taddr->buf = malloc(taddr->len); 247 if (ad_cache->ac_taddr->buf == NULL) { 248 out: 249 if (ad_cache->ac_host) 250 free(ad_cache->ac_host); 251 if (ad_cache->ac_netid) 252 free(ad_cache->ac_netid); 253 if (ad_cache->ac_uaddr) 254 free(ad_cache->ac_uaddr); 255 if (ad_cache->ac_taddr) 256 free(ad_cache->ac_taddr); 257 free(ad_cache); 258 return; 259 } 260 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len); 261 #ifdef ND_DEBUG 262 fprintf(stderr, "Added to cache: %s : %s\n", host, netid); 263 #endif 264 265 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */ 266 267 rwlock_wrlock(&rpcbaddr_cache_lock); 268 if (cachesize < CACHESIZE) { 269 ad_cache->ac_next = front; 270 front = ad_cache; 271 cachesize++; 272 } else { 273 /* Free the last entry */ 274 cptr = front; 275 prevptr = NULL; 276 while (cptr->ac_next) { 277 prevptr = cptr; 278 cptr = cptr->ac_next; 279 } 280 281 #ifdef ND_DEBUG 282 fprintf(stderr, "Deleted from cache: %s : %s\n", 283 cptr->ac_host, cptr->ac_netid); 284 #endif 285 free(cptr->ac_host); 286 free(cptr->ac_netid); 287 free(cptr->ac_taddr->buf); 288 free(cptr->ac_taddr); 289 if (cptr->ac_uaddr) 290 free(cptr->ac_uaddr); 291 292 if (prevptr) { 293 prevptr->ac_next = NULL; 294 ad_cache->ac_next = front; 295 front = ad_cache; 296 } else { 297 front = ad_cache; 298 ad_cache->ac_next = NULL; 299 } 300 free(cptr); 301 } 302 rwlock_unlock(&rpcbaddr_cache_lock); 303 } 304 305 /* 306 * This routine will return a client handle that is connected to the 307 * rpcbind. Returns NULL on error and free's everything. 308 */ 309 static CLIENT * 310 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr) 311 { 312 CLIENT *client; 313 struct netbuf *addr, taddr; 314 struct netbuf addr_to_delete; 315 struct __rpc_sockinfo si; 316 struct addrinfo hints, *res, *tres; 317 struct address_cache *ad_cache; 318 char *tmpaddr; 319 320 _DIAGASSERT(host != NULL); 321 _DIAGASSERT(nconf != NULL); 322 /* targaddr may be NULL */ 323 324 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */ 325 326 /* Get the address of the rpcbind. Check cache first */ 327 client = NULL; 328 addr_to_delete.len = 0; 329 addr_to_delete.buf = NULL; 330 rwlock_rdlock(&rpcbaddr_cache_lock); 331 ad_cache = check_cache(host, nconf->nc_netid); 332 if (ad_cache != NULL) { 333 addr = ad_cache->ac_taddr; 334 client = clnt_tli_create(RPC_ANYFD, nconf, addr, 335 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 336 if (client != NULL) { 337 if (targaddr) 338 *targaddr = ad_cache->ac_uaddr; 339 rwlock_unlock(&rpcbaddr_cache_lock); 340 return (client); 341 } 342 addr_to_delete.len = addr->len; 343 addr_to_delete.buf = malloc(addr->len); 344 if (addr_to_delete.buf == NULL) { 345 addr_to_delete.len = 0; 346 } else { 347 memcpy(addr_to_delete.buf, addr->buf, addr->len); 348 } 349 } 350 rwlock_unlock(&rpcbaddr_cache_lock); 351 if (addr_to_delete.len != 0) { 352 /* 353 * Assume this may be due to cache data being 354 * outdated 355 */ 356 rwlock_wrlock(&rpcbaddr_cache_lock); 357 delete_cache(&addr_to_delete); 358 rwlock_unlock(&rpcbaddr_cache_lock); 359 free(addr_to_delete.buf); 360 } 361 if (!__rpc_nconf2sockinfo(nconf, &si)) { 362 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 363 return NULL; 364 } 365 366 memset(&hints, 0, sizeof hints); 367 hints.ai_family = si.si_af; 368 hints.ai_socktype = si.si_socktype; 369 hints.ai_protocol = si.si_proto; 370 371 #ifdef CLNT_DEBUG 372 printf("trying netid %s family %d proto %d socktype %d\n", 373 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype); 374 #endif 375 376 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) { 377 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 378 return NULL; 379 } 380 381 for (tres = res; tres != NULL; tres = tres->ai_next) { 382 taddr.buf = tres->ai_addr; 383 taddr.len = taddr.maxlen = tres->ai_addrlen; 384 385 #ifdef ND_DEBUG 386 { 387 char *ua; 388 389 ua = taddr2uaddr(nconf, &taddr); 390 fprintf(stderr, "Got it [%s]\n", ua); 391 free(ua); 392 } 393 #endif 394 395 #ifdef ND_DEBUG 396 { 397 int i; 398 399 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n", 400 taddr.len, taddr.maxlen); 401 fprintf(stderr, "\tAddress is "); 402 for (i = 0; i < taddr.len; i++) 403 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]); 404 fprintf(stderr, "\n"); 405 } 406 #endif 407 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr, 408 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 409 #ifdef ND_DEBUG 410 if (! client) { 411 clnt_pcreateerror("rpcbind clnt interface"); 412 } 413 #endif 414 415 if (client) { 416 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL; 417 add_cache(host, nconf->nc_netid, &taddr, tmpaddr); 418 if (targaddr) 419 *targaddr = tmpaddr; 420 break; 421 } 422 } 423 freeaddrinfo(res); 424 return (client); 425 } 426 427 /* XXX */ 428 #define IN4_LOCALHOST_STRING "127.0.0.1" 429 #define IN6_LOCALHOST_STRING "::1" 430 431 /* 432 * This routine will return a client handle that is connected to the local 433 * rpcbind. Returns NULL on error and free's everything. 434 */ 435 static CLIENT * 436 local_rpcb(void) 437 { 438 CLIENT *client; 439 static struct netconfig *loopnconf; 440 static const char *hostname; 441 #ifdef _REENTRANT 442 extern mutex_t loopnconf_lock; 443 #endif 444 int sock; 445 size_t tsize; 446 struct netbuf nbuf; 447 struct sockaddr_un sun; 448 449 /* 450 * Try connecting to the local rpcbind through a local socket 451 * first. If this doesn't work, try all transports defined in 452 * the netconfig file. 453 */ 454 memset(&sun, 0, sizeof sun); 455 sock = socket(AF_LOCAL, SOCK_STREAM, 0); 456 if (sock < 0) 457 goto try_nconf; 458 sun.sun_family = AF_LOCAL; 459 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 460 tsize = SUN_LEN(&sun); 461 _DIAGASSERT(__type_fit(uint8_t, tsize)); 462 nbuf.len = sun.sun_len = (uint8_t)tsize; 463 nbuf.maxlen = sizeof (struct sockaddr_un); 464 nbuf.buf = &sun; 465 466 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0); 467 _DIAGASSERT(__type_fit(u_int, tsize)); 468 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG, 469 (rpcvers_t)RPCBVERS, (u_int)tsize, (u_int)tsize); 470 471 if (client != NULL) { 472 /* XXX - mark the socket to be closed in destructor */ 473 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL); 474 return client; 475 } 476 477 /* XXX - nobody needs this socket anymore, free the descriptor */ 478 close(sock); 479 480 try_nconf: 481 482 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */ 483 mutex_lock(&loopnconf_lock); 484 if (loopnconf == NULL) { 485 struct netconfig *nconf, *tmpnconf = NULL; 486 void *nc_handle; 487 int fd; 488 489 nc_handle = setnetconfig(); 490 if (nc_handle == NULL) { 491 /* fails to open netconfig file */ 492 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 493 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 494 mutex_unlock(&loopnconf_lock); 495 return (NULL); 496 } 497 while ((nconf = getnetconfig(nc_handle)) != NULL) { 498 #ifdef INET6 499 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 || 500 #else 501 if (( 502 #endif 503 strcmp(nconf->nc_protofmly, NC_INET) == 0) && 504 (nconf->nc_semantics == NC_TPI_COTS || 505 nconf->nc_semantics == NC_TPI_COTS_ORD)) { 506 fd = __rpc_nconf2fd(nconf); 507 /* 508 * Can't create a socket, assume that 509 * this family isn't configured in the kernel. 510 */ 511 if (fd < 0) 512 continue; 513 close(fd); 514 tmpnconf = nconf; 515 if (!strcmp(nconf->nc_protofmly, NC_INET)) 516 hostname = IN4_LOCALHOST_STRING; 517 else 518 hostname = IN6_LOCALHOST_STRING; 519 } 520 } 521 if (tmpnconf == NULL) { 522 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 523 mutex_unlock(&loopnconf_lock); 524 return (NULL); 525 } 526 loopnconf = getnetconfigent(tmpnconf->nc_netid); 527 /* loopnconf is never freed */ 528 endnetconfig(nc_handle); 529 } 530 mutex_unlock(&loopnconf_lock); 531 client = getclnthandle(hostname, loopnconf, NULL); 532 return (client); 533 } 534 535 /* 536 * Set a mapping between program, version and address. 537 * Calls the rpcbind service to do the mapping. 538 */ 539 bool_t 540 rpcb_set(rpcprog_t program, rpcvers_t version, 541 const struct netconfig *nconf, /* Network structure of transport */ 542 const struct netbuf *address) /* Services netconfig address */ 543 { 544 CLIENT *client; 545 bool_t rslt = FALSE; 546 RPCB parms; 547 char uidbuf[32]; 548 549 /* parameter checking */ 550 if (nconf == NULL) { 551 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 552 return (FALSE); 553 } 554 if (address == NULL) { 555 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 556 return (FALSE); 557 } 558 client = local_rpcb(); 559 if (! client) { 560 return (FALSE); 561 } 562 563 /* convert to universal */ 564 parms.r_addr = taddr2uaddr(__UNCONST(nconf), __UNCONST(address)); 565 if (!parms.r_addr) { 566 CLNT_DESTROY(client); 567 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 568 return (FALSE); /* no universal address */ 569 } 570 parms.r_prog = program; 571 parms.r_vers = version; 572 parms.r_netid = nconf->nc_netid; 573 /* 574 * Though uid is not being used directly, we still send it for 575 * completeness. For non-unix platforms, perhaps some other 576 * string or an empty string can be sent. 577 */ 578 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 579 parms.r_owner = uidbuf; 580 581 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb, 582 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 583 (char *)(void *)&rslt, tottimeout) != RPC_SUCCESS) { 584 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 585 clnt_geterr(client, &rpc_createerr.cf_error); 586 } 587 588 CLNT_DESTROY(client); 589 free(parms.r_addr); 590 return (rslt); 591 } 592 593 /* 594 * Remove the mapping between program, version and netbuf address. 595 * Calls the rpcbind service to do the un-mapping. 596 * If netbuf is NULL, unset for all the transports, otherwise unset 597 * only for the given transport. 598 */ 599 bool_t 600 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf) 601 { 602 CLIENT *client; 603 bool_t rslt = FALSE; 604 RPCB parms; 605 char uidbuf[32]; 606 607 client = local_rpcb(); 608 if (! client) { 609 return (FALSE); 610 } 611 612 parms.r_prog = program; 613 parms.r_vers = version; 614 if (nconf) 615 parms.r_netid = nconf->nc_netid; 616 else { 617 parms.r_netid = __UNCONST(&nullstring[0]); /* unsets all */ 618 } 619 parms.r_addr = __UNCONST(&nullstring[0]); 620 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 621 parms.r_owner = uidbuf; 622 623 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb, 624 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 625 (char *)(void *)&rslt, tottimeout) != RPC_SUCCESS) { 626 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 627 clnt_geterr(client, &rpc_createerr.cf_error); 628 } 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 _DIAGASSERT(nconf != NULL); 645 646 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) { 647 rmap = &sp->rpcb_entry_map; 648 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) && 649 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) && 650 (nconf->nc_semantics == rmap->r_nc_semantics) && 651 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) { 652 na = uaddr2taddr(nconf, rmap->r_maddr); 653 #ifdef ND_DEBUG 654 fprintf(stderr, "\tRemote address is [%s].\n", 655 rmap->r_maddr); 656 if (!na) 657 fprintf(stderr, 658 "\tCouldn't resolve remote address!\n"); 659 #endif 660 break; 661 } 662 } 663 return (na); 664 } 665 666 /* 667 * An internal function which optimizes rpcb_getaddr function. It also 668 * returns the client handle that it uses to contact the remote rpcbind. 669 * 670 * The algorithm used: If the transports is TCP or UDP, it first tries 671 * version 2 (portmap), 4 and then 3 (svr4). This order should be 672 * changed in the next OS release to 4, 2 and 3. We are assuming that by 673 * that time, version 4 would be available on many machines on the network. 674 * With this algorithm, we get performance as well as a plan for 675 * obsoleting version 2. 676 * 677 * For all other transports, the algorithm remains as 4 and then 3. 678 * 679 * XXX: Due to some problems with t_connect(), we do not reuse the same client 680 * handle for COTS cases and hence in these cases we do not return the 681 * client handle. This code will change if t_connect() ever 682 * starts working properly. Also look under clnt_vc.c. 683 */ 684 struct netbuf * 685 __rpcb_findaddr(rpcprog_t program, rpcvers_t version, 686 const struct netconfig *nconf, const char *host, CLIENT **clpp) 687 { 688 CLIENT *client = NULL; 689 RPCB parms; 690 enum clnt_stat clnt_st; 691 char *ua = NULL; 692 rpcvers_t vers; 693 struct netbuf *address = NULL; 694 rpcvers_t start_vers = RPCBVERS4; 695 struct netbuf servaddr; 696 697 /* nconf is handled below */ 698 _DIAGASSERT(host != NULL); 699 /* clpp may be NULL */ 700 701 /* parameter checking */ 702 if (nconf == NULL) { 703 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 704 return (NULL); 705 } 706 707 parms.r_addr = NULL; 708 709 #ifdef PORTMAP 710 /* Try version 2 for TCP or UDP */ 711 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 712 u_short port = 0; 713 struct netbuf remote; 714 rpcvers_t pmapvers = 2; 715 struct pmap pmapparms; 716 717 /* 718 * Try UDP only - there are some portmappers out 719 * there that use UDP only. 720 */ 721 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 722 struct netconfig *newnconf; 723 724 if ((newnconf = getnetconfigent("udp")) == NULL) { 725 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 726 return (NULL); 727 } 728 client = getclnthandle(host, newnconf, &parms.r_addr); 729 freenetconfigent(newnconf); 730 } else { 731 client = getclnthandle(host, nconf, &parms.r_addr); 732 } 733 if (client == NULL) { 734 return (NULL); 735 } 736 737 /* Set the version */ 738 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&pmapvers); 739 pmapparms.pm_prog = program; 740 pmapparms.pm_vers = version; 741 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 742 IPPROTO_UDP : IPPROTO_TCP; 743 pmapparms.pm_port = 0; /* not needed */ 744 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 745 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 746 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 747 tottimeout); 748 if (clnt_st != RPC_SUCCESS) { 749 if ((clnt_st == RPC_PROGVERSMISMATCH) || 750 (clnt_st == RPC_PROGUNAVAIL)) 751 goto try_rpcbind; /* Try different versions */ 752 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 753 clnt_geterr(client, &rpc_createerr.cf_error); 754 goto error; 755 } else if (port == 0) { 756 address = NULL; 757 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 758 goto error; 759 } 760 port = htons(port); 761 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)(void *)&remote); 762 if (((address = malloc(sizeof(struct netbuf))) == NULL) || 763 ((address->buf = malloc(remote.len)) == NULL)) { 764 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 765 clnt_geterr(client, &rpc_createerr.cf_error); 766 if (address) { 767 free(address); 768 address = NULL; 769 } 770 goto error; 771 } 772 memcpy(address->buf, remote.buf, remote.len); 773 memcpy(&((char *)address->buf)[sizeof (short)], 774 (char *)(void *)&port, sizeof (short)); 775 address->len = address->maxlen = remote.len; 776 goto done; 777 } 778 #endif 779 780 try_rpcbind: 781 /* 782 * Now we try version 4 and then 3. 783 * We also send the remote system the address we used to 784 * contact it in case it can help to connect back with us 785 */ 786 parms.r_prog = program; 787 parms.r_vers = version; 788 parms.r_owner = __UNCONST(&nullstring[0]); /* not needed; */ 789 /* just for xdring */ 790 parms.r_netid = nconf->nc_netid; /* not really needed */ 791 792 /* 793 * If a COTS transport is being used, try getting address via CLTS 794 * transport. This works only with version 4. 795 * NOTE: This is being done for all transports EXCEPT LOOPBACK 796 * because with loopback the cost to go to a COTS is same as 797 * the cost to go through CLTS, plus you get the advantage of 798 * finding out immediately if the local rpcbind process is dead. 799 */ 800 #if 1 801 if ((nconf->nc_semantics == NC_TPI_COTS_ORD || 802 nconf->nc_semantics == NC_TPI_COTS) && 803 (strcmp(nconf->nc_protofmly, NC_LOOPBACK) != 0)) 804 #else 805 if (client != NULL) { 806 CLNT_DESTROY(client); 807 client = NULL; 808 } 809 if (nconf->nc_semantics == NC_TPI_CLTS) 810 #endif 811 { 812 void *handle; 813 struct netconfig *nconf_clts; 814 rpcb_entry_list_ptr relp = NULL; 815 816 if (client == NULL) { 817 /* This did not go through the above PORTMAP/TCP code */ 818 #if 1 819 if ((handle = __rpc_setconf("datagram_v")) != NULL) 820 #else 821 if ((handle = __rpc_setconf("circuit_v")) != NULL) 822 #endif 823 { 824 while ((nconf_clts = __rpc_getconf(handle)) 825 != NULL) { 826 if (strcmp(nconf_clts->nc_protofmly, 827 nconf->nc_protofmly) != 0) { 828 continue; 829 } 830 client = getclnthandle(host, nconf_clts, 831 &parms.r_addr); 832 break; 833 } 834 __rpc_endconf(handle); 835 } 836 if (client == NULL) 837 goto regular_rpcbind; /* Go the regular way */ 838 } else { 839 /* This is a UDP PORTMAP handle. Change to version 4 */ 840 vers = RPCBVERS4; 841 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 842 } 843 /* 844 * We also send the remote system the address we used to 845 * contact it in case it can help it connect back with us 846 */ 847 if (parms.r_addr == NULL) { 848 /* for XDRing */ 849 parms.r_addr = __UNCONST(&nullstring[0]); 850 } 851 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST, 852 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 853 (xdrproc_t) xdr_rpcb_entry_list_ptr, 854 (char *)(void *)&relp, tottimeout); 855 if (clnt_st == RPC_SUCCESS) { 856 if ((address = got_entry(relp, nconf)) != NULL) { 857 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 858 (char *)(void *)&relp); 859 CLNT_CONTROL(client, CLGET_SVC_ADDR, 860 (char *)(void *)&servaddr); 861 __rpc_fixup_addr(address, &servaddr); 862 goto done; 863 } 864 /* Entry not found for this transport */ 865 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 866 (char *)(void *)&relp); 867 /* 868 * XXX: should have perhaps returned with error but 869 * since the remote machine might not always be able 870 * to send the address on all transports, we try the 871 * regular way with regular_rpcbind 872 */ 873 goto regular_rpcbind; 874 } else if ((clnt_st == RPC_PROGVERSMISMATCH) || 875 (clnt_st == RPC_PROGUNAVAIL)) { 876 start_vers = RPCBVERS; /* Try version 3 now */ 877 goto regular_rpcbind; /* Try different versions */ 878 } else { 879 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 880 clnt_geterr(client, &rpc_createerr.cf_error); 881 goto error; 882 } 883 } 884 885 regular_rpcbind: 886 887 /* Now the same transport is to be used to get the address */ 888 #if 1 889 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) || 890 (nconf->nc_semantics == NC_TPI_COTS))) 891 #else 892 if (client && nconf->nc_semantics == NC_TPI_CLTS) 893 #endif 894 { 895 /* A CLTS type of client - destroy it */ 896 CLNT_DESTROY(client); 897 client = NULL; 898 } 899 900 if (client == NULL) { 901 client = getclnthandle(host, nconf, &parms.r_addr); 902 if (client == NULL) { 903 goto error; 904 } 905 } 906 if (parms.r_addr == NULL) 907 parms.r_addr = __UNCONST(&nullstring[0]); 908 909 /* First try from start_vers and then version 3 (RPCBVERS) */ 910 for (vers = start_vers; vers >= RPCBVERS; vers--) { 911 /* Set the version */ 912 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 913 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR, 914 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 915 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, 916 tottimeout); 917 if (clnt_st == RPC_SUCCESS) { 918 if ((ua == NULL) || (ua[0] == 0)) { 919 /* address unknown */ 920 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 921 goto error; 922 } 923 address = uaddr2taddr(nconf, ua); 924 #ifdef ND_DEBUG 925 fprintf(stderr, "\tRemote address is [%s]\n", ua); 926 if (!address) 927 fprintf(stderr, 928 "\tCouldn't resolve remote address!\n"); 929 #endif 930 xdr_free((xdrproc_t)xdr_wrapstring, 931 (char *)(void *)&ua); 932 933 if (! address) { 934 /* We don't know about your universal address */ 935 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 936 goto error; 937 } 938 CLNT_CONTROL(client, CLGET_SVC_ADDR, 939 (char *)(void *)&servaddr); 940 __rpc_fixup_addr(address, &servaddr); 941 goto done; 942 } else if (clnt_st == RPC_PROGVERSMISMATCH) { 943 struct rpc_err rpcerr; 944 945 clnt_geterr(client, &rpcerr); 946 if (rpcerr.re_vers.low > RPCBVERS4) 947 goto error; /* a new version, can't handle */ 948 } else if (clnt_st != RPC_PROGUNAVAIL) { 949 /* Cant handle this error */ 950 rpc_createerr.cf_stat = clnt_st; 951 clnt_geterr(client, &rpc_createerr.cf_error); 952 goto error; 953 } 954 } 955 956 error: 957 if (client) { 958 CLNT_DESTROY(client); 959 client = NULL; 960 } 961 done: 962 if (nconf->nc_semantics != NC_TPI_CLTS) { 963 /* This client is the connectionless one */ 964 if (client) { 965 CLNT_DESTROY(client); 966 client = NULL; 967 } 968 } 969 if (clpp) { 970 *clpp = client; 971 } else if (client) { 972 CLNT_DESTROY(client); 973 } 974 return (address); 975 } 976 977 978 /* 979 * Find the mapped address for program, version. 980 * Calls the rpcbind service remotely to do the lookup. 981 * Uses the transport specified in nconf. 982 * Returns FALSE (0) if no map exists, else returns 1. 983 * 984 * Assuming that the address is all properly allocated 985 */ 986 bool_t 987 rpcb_getaddr(const rpcprog_t program, const rpcvers_t version, 988 const struct netconfig *nconf, struct netbuf *address, 989 const char *host) 990 { 991 struct netbuf *na; 992 993 _DIAGASSERT(address != NULL); 994 995 if ((na = __rpcb_findaddr(program, version, nconf, 996 host, NULL)) == NULL) 997 return (FALSE); 998 999 if (na->len > address->maxlen) { 1000 /* Too long address */ 1001 free(na->buf); 1002 free(na); 1003 rpc_createerr.cf_stat = RPC_FAILED; 1004 return (FALSE); 1005 } 1006 memcpy(address->buf, na->buf, (size_t)na->len); 1007 address->len = na->len; 1008 free(na->buf); 1009 free(na); 1010 return (TRUE); 1011 } 1012 1013 /* 1014 * Get a copy of the current maps. 1015 * Calls the rpcbind service remotely to get the maps. 1016 * 1017 * It returns only a list of the services 1018 * It returns NULL on failure. 1019 */ 1020 rpcblist * 1021 rpcb_getmaps(const struct netconfig *nconf, const char *host) 1022 { 1023 rpcblist_ptr head = NULL; 1024 CLIENT *client; 1025 enum clnt_stat clnt_st; 1026 rpcvers_t vers = 0; 1027 1028 client = getclnthandle(host, nconf, NULL); 1029 if (client == NULL) { 1030 return (head); 1031 } 1032 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1033 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1034 (char *)(void *)&head, tottimeout); 1035 if (clnt_st == RPC_SUCCESS) 1036 goto done; 1037 1038 if ((clnt_st != RPC_PROGVERSMISMATCH) && 1039 (clnt_st != RPC_PROGUNAVAIL)) { 1040 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1041 clnt_geterr(client, &rpc_createerr.cf_error); 1042 goto done; 1043 } 1044 1045 /* fall back to earlier version */ 1046 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1047 if (vers == RPCBVERS4) { 1048 vers = RPCBVERS; 1049 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1050 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1051 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1052 (char *)(void *)&head, tottimeout) == RPC_SUCCESS) 1053 goto done; 1054 } 1055 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1056 clnt_geterr(client, &rpc_createerr.cf_error); 1057 1058 done: 1059 CLNT_DESTROY(client); 1060 return (head); 1061 } 1062 1063 /* 1064 * rpcbinder remote-call-service interface. 1065 * This routine is used to call the rpcbind remote call service 1066 * which will look up a service program in the address maps, and then 1067 * remotely call that routine with the given parameters. This allows 1068 * programs to do a lookup and call in one step. 1069 */ 1070 enum clnt_stat 1071 rpcb_rmtcall( 1072 const struct netconfig *nconf, /* Netconfig structure */ 1073 const char *host, /* Remote host name */ 1074 rpcprog_t prog, 1075 rpcvers_t vers, 1076 rpcproc_t proc, /* Remote proc identifiers */ 1077 xdrproc_t xdrargs, 1078 const char *argsp, /* Argument */ 1079 xdrproc_t xdrres, /* XDR routines */ 1080 caddr_t resp, /* Result */ 1081 struct timeval tout, /* Timeout value for this call */ 1082 const struct netbuf *addr_ptr) /* Preallocated netbuf address */ 1083 { 1084 CLIENT *client; 1085 enum clnt_stat stat; 1086 struct r_rpcb_rmtcallargs a; 1087 struct r_rpcb_rmtcallres r; 1088 rpcvers_t rpcb_vers; 1089 1090 stat = RPC_FAILED; /* XXXGCC -Wuninitialized [dreamcast] */ 1091 1092 client = getclnthandle(host, nconf, NULL); 1093 if (client == NULL) { 1094 return (RPC_FAILED); 1095 } 1096 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, __UNCONST(&rmttimeout)); 1097 a.prog = prog; 1098 a.vers = vers; 1099 a.proc = proc; 1100 a.args.args_val = argsp; 1101 a.xdr_args = xdrargs; 1102 r.addr = NULL; 1103 r.results.results_val = resp; 1104 r.xdr_res = xdrres; 1105 1106 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1107 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1108 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1109 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1110 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1111 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1112 struct netbuf *na; 1113 na = uaddr2taddr(__UNCONST(nconf), r.addr); 1114 if (!na) { 1115 stat = RPC_N2AXLATEFAILURE; 1116 ((struct netbuf *)__UNCONST(addr_ptr))->len = 0; 1117 goto error; 1118 } 1119 if (na->len > addr_ptr->maxlen) { 1120 /* Too long address */ 1121 stat = RPC_FAILED; /* XXX A better error no */ 1122 free(na->buf); 1123 free(na); 1124 ((struct netbuf *)__UNCONST(addr_ptr))->len = 0; 1125 goto error; 1126 } 1127 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1128 ((struct netbuf *)__UNCONST(addr_ptr))->len = na->len; 1129 free(na->buf); 1130 free(na); 1131 break; 1132 } else if ((stat != RPC_PROGVERSMISMATCH) && 1133 (stat != RPC_PROGUNAVAIL)) { 1134 goto error; 1135 } 1136 } 1137 error: 1138 CLNT_DESTROY(client); 1139 if (r.addr) 1140 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1141 return (stat); 1142 } 1143 1144 /* 1145 * Gets the time on the remote host. 1146 * Returns 1 if succeeds else 0. 1147 */ 1148 bool_t 1149 rpcb_gettime(const char *host, time_t *timep) 1150 { 1151 CLIENT *client = NULL; 1152 void *handle; 1153 struct netconfig *nconf; 1154 rpcvers_t vers; 1155 enum clnt_stat st; 1156 1157 1158 if ((host == NULL) || (host[0] == 0)) { 1159 time(timep); 1160 return (TRUE); 1161 } 1162 1163 if ((handle = __rpc_setconf("netpath")) == NULL) { 1164 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1165 return (FALSE); 1166 } 1167 rpc_createerr.cf_stat = RPC_SUCCESS; 1168 while (client == NULL) { 1169 if ((nconf = __rpc_getconf(handle)) == NULL) { 1170 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1171 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1172 break; 1173 } 1174 client = getclnthandle(host, nconf, NULL); 1175 if (client) 1176 break; 1177 } 1178 __rpc_endconf(handle); 1179 if (client == NULL) { 1180 return (FALSE); 1181 } 1182 1183 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1184 (xdrproc_t) xdr_void, NULL, 1185 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1186 1187 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1188 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1189 if (vers == RPCBVERS4) { 1190 /* fall back to earlier version */ 1191 vers = RPCBVERS; 1192 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1193 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1194 (xdrproc_t) xdr_void, NULL, 1195 (xdrproc_t) xdr_int, (char *)(void *)timep, 1196 tottimeout); 1197 } 1198 } 1199 CLNT_DESTROY(client); 1200 return (st == RPC_SUCCESS? TRUE: FALSE); 1201 } 1202 1203 /* 1204 * Converts taddr to universal address. This routine should never 1205 * really be called because local n2a libraries are always provided. 1206 */ 1207 char * 1208 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr) 1209 { 1210 CLIENT *client; 1211 char *uaddr = NULL; 1212 1213 /* parameter checking */ 1214 if (nconf == NULL) { 1215 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1216 return (NULL); 1217 } 1218 if (taddr == NULL) { 1219 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1220 return (NULL); 1221 } 1222 client = local_rpcb(); 1223 if (! client) { 1224 return (NULL); 1225 } 1226 1227 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1228 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1229 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout) 1230 != RPC_SUCCESS) { 1231 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 1232 clnt_geterr(client, &rpc_createerr.cf_error); 1233 } 1234 CLNT_DESTROY(client); 1235 return (uaddr); 1236 } 1237 1238 /* 1239 * Converts universal address to netbuf. This routine should never 1240 * really be called because local n2a libraries are always provided. 1241 */ 1242 struct netbuf * 1243 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr) 1244 { 1245 CLIENT *client; 1246 struct netbuf *taddr; 1247 1248 1249 /* parameter checking */ 1250 if (nconf == NULL) { 1251 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1252 return (NULL); 1253 } 1254 if (uaddr == NULL) { 1255 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1256 return (NULL); 1257 } 1258 client = local_rpcb(); 1259 if (! client) { 1260 return (NULL); 1261 } 1262 1263 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1264 if (taddr == NULL) { 1265 CLNT_DESTROY(client); 1266 return (NULL); 1267 } 1268 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1269 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1270 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1271 tottimeout) != RPC_SUCCESS) { 1272 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 1273 clnt_geterr(client, &rpc_createerr.cf_error); 1274 free(taddr); 1275 taddr = NULL; 1276 } 1277 CLNT_DESTROY(client); 1278 return (taddr); 1279 } 1280