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) 35 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro"; 36 #endif 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 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 71 static struct timeval tottimeout = { 60, 0 }; 72 static const struct timeval rmttimeout = { 3, 0 }; 73 static struct timeval rpcbrmttime = { 15, 0 }; 74 75 extern bool_t xdr_wrapstring(XDR *, char **); 76 77 static const char nullstring[] = "\000"; 78 79 #define CACHESIZE 6 80 81 struct 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 89 static struct address_cache *front; 90 static int cachesize; 91 92 #define CLCR_GET_RPCB_TIMEOUT 1 93 #define CLCR_SET_RPCB_TIMEOUT 2 94 95 96 extern int __rpc_lowvers; 97 98 static struct address_cache *check_cache(const char *, const char *); 99 static void delete_cache(struct netbuf *); 100 static void add_cache(const char *, const char *, struct netbuf *, char *); 101 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **); 102 static CLIENT *local_rpcb(void); 103 static 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 */ 111 bool_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 */ 149 150 static struct address_cache * 151 check_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 } 169 170 static void 171 delete_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 } 194 195 static void 196 add_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) { 217 out: 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 */ 276 static CLIENT * 277 getclnthandle(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 */ 422 static CLIENT * 423 local_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); 460 461 try_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 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 504 mutex_unlock(&loopnconf_lock); 505 return (NULL); 506 } 507 loopnconf = getnetconfigent(tmpnconf->nc_netid); 508 /* loopnconf is never freed */ 509 endnetconfig(nc_handle); 510 } 511 mutex_unlock(&loopnconf_lock); 512 client = getclnthandle(hostname, loopnconf, NULL); 513 return (client); 514 } 515 516 /* 517 * Set a mapping between program, version and address. 518 * Calls the rpcbind service to do the mapping. 519 * 520 * nconf - Network structure of transport 521 * address - Services netconfig address 522 */ 523 bool_t 524 rpcb_set(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf, 525 const struct netbuf *address) 526 { 527 CLIENT *client; 528 bool_t rslt = FALSE; 529 RPCB parms; 530 char uidbuf[32]; 531 532 /* parameter checking */ 533 if (nconf == NULL) { 534 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 535 return (FALSE); 536 } 537 if (address == NULL) { 538 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 539 return (FALSE); 540 } 541 client = local_rpcb(); 542 if (! client) { 543 return (FALSE); 544 } 545 546 /* convert to universal */ 547 /*LINTED const castaway*/ 548 parms.r_addr = taddr2uaddr((struct netconfig *) nconf, 549 (struct netbuf *)address); 550 if (!parms.r_addr) { 551 CLNT_DESTROY(client); 552 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 553 return (FALSE); /* no universal address */ 554 } 555 parms.r_prog = program; 556 parms.r_vers = version; 557 parms.r_netid = nconf->nc_netid; 558 /* 559 * Though uid is not being used directly, we still send it for 560 * completeness. For non-unix platforms, perhaps some other 561 * string or an empty string can be sent. 562 */ 563 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 564 parms.r_owner = uidbuf; 565 566 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb, 567 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 568 (char *)(void *)&rslt, tottimeout); 569 570 CLNT_DESTROY(client); 571 free(parms.r_addr); 572 return (rslt); 573 } 574 575 /* 576 * Remove the mapping between program, version and netbuf address. 577 * Calls the rpcbind service to do the un-mapping. 578 * If netbuf is NULL, unset for all the transports, otherwise unset 579 * only for the given transport. 580 */ 581 bool_t 582 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf) 583 { 584 CLIENT *client; 585 bool_t rslt = FALSE; 586 RPCB parms; 587 char uidbuf[32]; 588 589 client = local_rpcb(); 590 if (! client) { 591 return (FALSE); 592 } 593 594 parms.r_prog = program; 595 parms.r_vers = version; 596 if (nconf) 597 parms.r_netid = nconf->nc_netid; 598 else { 599 /*LINTED const castaway*/ 600 parms.r_netid = (char *) &nullstring[0]; /* unsets all */ 601 } 602 /*LINTED const castaway*/ 603 parms.r_addr = (char *) &nullstring[0]; 604 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 605 parms.r_owner = uidbuf; 606 607 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb, 608 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 609 (char *)(void *)&rslt, tottimeout); 610 611 CLNT_DESTROY(client); 612 return (rslt); 613 } 614 615 /* 616 * From the merged list, find the appropriate entry 617 */ 618 static struct netbuf * 619 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf) 620 { 621 struct netbuf *na = NULL; 622 rpcb_entry_list_ptr sp; 623 rpcb_entry *rmap; 624 625 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) { 626 rmap = &sp->rpcb_entry_map; 627 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) && 628 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) && 629 (nconf->nc_semantics == rmap->r_nc_semantics) && 630 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) { 631 na = uaddr2taddr(nconf, rmap->r_maddr); 632 #ifdef ND_DEBUG 633 fprintf(stderr, "\tRemote address is [%s].\n", 634 rmap->r_maddr); 635 if (!na) 636 fprintf(stderr, 637 "\tCouldn't resolve remote address!\n"); 638 #endif 639 break; 640 } 641 } 642 return (na); 643 } 644 645 /* 646 * Quick check to see if rpcbind is up. Tries to connect over 647 * local transport. 648 */ 649 static bool_t 650 __rpcbind_is_up(void) 651 { 652 struct netconfig *nconf; 653 struct sockaddr_un sun; 654 void *localhandle; 655 int sock; 656 657 nconf = NULL; 658 localhandle = setnetconfig(); 659 while ((nconf = getnetconfig(localhandle)) != NULL) { 660 if (nconf->nc_protofmly != NULL && 661 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 662 break; 663 } 664 if (nconf == NULL) 665 return (FALSE); 666 667 endnetconfig(localhandle); 668 669 memset(&sun, 0, sizeof sun); 670 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 671 if (sock < 0) 672 return (FALSE); 673 sun.sun_family = AF_LOCAL; 674 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path)); 675 sun.sun_len = SUN_LEN(&sun); 676 677 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) { 678 _close(sock); 679 return (FALSE); 680 } 681 682 _close(sock); 683 return (TRUE); 684 } 685 686 /* 687 * An internal function which optimizes rpcb_getaddr function. It also 688 * returns the client handle that it uses to contact the remote rpcbind. 689 * 690 * The algorithm used: If the transports is TCP or UDP, it first tries 691 * version 2 (portmap), 4 and then 3 (svr4). This order should be 692 * changed in the next OS release to 4, 2 and 3. We are assuming that by 693 * that time, version 4 would be available on many machines on the network. 694 * With this algorithm, we get performance as well as a plan for 695 * obsoleting version 2. 696 * 697 * For all other transports, the algorithm remains as 4 and then 3. 698 * 699 * XXX: Due to some problems with t_connect(), we do not reuse the same client 700 * handle for COTS cases and hence in these cases we do not return the 701 * client handle. This code will change if t_connect() ever 702 * starts working properly. Also look under clnt_vc.c. 703 */ 704 struct netbuf * 705 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version, 706 const struct netconfig *nconf, const char *host, 707 CLIENT **clpp, struct timeval *tp) 708 { 709 static bool_t check_rpcbind = TRUE; 710 CLIENT *client = NULL; 711 RPCB parms; 712 enum clnt_stat clnt_st; 713 char *ua = NULL; 714 rpcvers_t vers; 715 struct netbuf *address = NULL; 716 rpcvers_t start_vers = RPCBVERS4; 717 struct netbuf servaddr; 718 719 /* parameter checking */ 720 if (nconf == NULL) { 721 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 722 return (NULL); 723 } 724 725 parms.r_addr = NULL; 726 727 /* 728 * Use default total timeout if no timeout is specified. 729 */ 730 if (tp == NULL) 731 tp = &tottimeout; 732 733 #ifdef PORTMAP 734 /* Try version 2 for TCP or UDP */ 735 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 736 u_short port = 0; 737 struct netbuf remote; 738 rpcvers_t pmapvers = 2; 739 struct pmap pmapparms; 740 741 /* 742 * Try UDP only - there are some portmappers out 743 * there that use UDP only. 744 */ 745 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 746 struct netconfig *newnconf; 747 748 if ((newnconf = getnetconfigent("udp")) == NULL) { 749 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 750 return (NULL); 751 } 752 client = getclnthandle(host, newnconf, &parms.r_addr); 753 freenetconfigent(newnconf); 754 } else { 755 client = getclnthandle(host, nconf, &parms.r_addr); 756 } 757 if (client == NULL) 758 return (NULL); 759 760 /* 761 * Set version and retry timeout. 762 */ 763 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 764 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers); 765 766 pmapparms.pm_prog = program; 767 pmapparms.pm_vers = version; 768 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 769 IPPROTO_UDP : IPPROTO_TCP; 770 pmapparms.pm_port = 0; /* not needed */ 771 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 772 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 773 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 774 *tp); 775 if (clnt_st != RPC_SUCCESS) { 776 if ((clnt_st == RPC_PROGVERSMISMATCH) || 777 (clnt_st == RPC_PROGUNAVAIL)) 778 goto try_rpcbind; /* Try different versions */ 779 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 780 clnt_geterr(client, &rpc_createerr.cf_error); 781 goto error; 782 } else if (port == 0) { 783 address = NULL; 784 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 785 goto error; 786 } 787 port = htons(port); 788 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote); 789 if (((address = (struct netbuf *) 790 malloc(sizeof (struct netbuf))) == NULL) || 791 ((address->buf = (char *) 792 malloc(remote.len)) == NULL)) { 793 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 794 clnt_geterr(client, &rpc_createerr.cf_error); 795 free(address); 796 address = NULL; 797 goto error; 798 } 799 memcpy(address->buf, remote.buf, remote.len); 800 memcpy(&((char *)address->buf)[sizeof (short)], 801 (char *)(void *)&port, sizeof (short)); 802 address->len = address->maxlen = remote.len; 803 goto done; 804 } 805 #endif /* PORTMAP */ 806 807 try_rpcbind: 808 /* 809 * Check if rpcbind is up. This prevents needless delays when 810 * accessing applications such as the keyserver while booting 811 * disklessly. 812 */ 813 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 814 if (!__rpcbind_is_up()) { 815 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 816 rpc_createerr.cf_error.re_errno = 0; 817 goto error; 818 } 819 check_rpcbind = FALSE; 820 } 821 822 /* 823 * Now we try version 4 and then 3. 824 * We also send the remote system the address we used to 825 * contact it in case it can help to connect back with us 826 */ 827 parms.r_prog = program; 828 parms.r_vers = version; 829 /*LINTED const castaway*/ 830 parms.r_owner = (char *) &nullstring[0]; /* not needed; */ 831 /* just for xdring */ 832 parms.r_netid = nconf->nc_netid; /* not really needed */ 833 834 /* 835 * If a COTS transport is being used, try getting address via CLTS 836 * transport. This works only with version 4. 837 */ 838 if (nconf->nc_semantics == NC_TPI_COTS_ORD || 839 nconf->nc_semantics == NC_TPI_COTS) { 840 841 void *handle; 842 struct netconfig *nconf_clts; 843 rpcb_entry_list_ptr relp = NULL; 844 845 if (client == NULL) { 846 /* This did not go through the above PORTMAP/TCP code */ 847 if ((handle = __rpc_setconf("datagram_v")) != NULL) { 848 while ((nconf_clts = __rpc_getconf(handle)) 849 != NULL) { 850 if (strcmp(nconf_clts->nc_protofmly, 851 nconf->nc_protofmly) != 0) { 852 continue; 853 } 854 client = getclnthandle(host, nconf_clts, 855 &parms.r_addr); 856 break; 857 } 858 __rpc_endconf(handle); 859 } 860 if (client == NULL) 861 goto regular_rpcbind; /* Go the regular way */ 862 } else { 863 /* This is a UDP PORTMAP handle. Change to version 4 */ 864 vers = RPCBVERS4; 865 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 866 } 867 /* 868 * We also send the remote system the address we used to 869 * contact it in case it can help it connect back with us 870 */ 871 if (parms.r_addr == NULL) { 872 /*LINTED const castaway*/ 873 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */ 874 } 875 876 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 877 878 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST, 879 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 880 (xdrproc_t) xdr_rpcb_entry_list_ptr, 881 (char *)(void *)&relp, *tp); 882 if (clnt_st == RPC_SUCCESS) { 883 if ((address = got_entry(relp, nconf)) != NULL) { 884 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 885 (char *)(void *)&relp); 886 CLNT_CONTROL(client, CLGET_SVC_ADDR, 887 (char *)(void *)&servaddr); 888 __rpc_fixup_addr(address, &servaddr); 889 goto done; 890 } 891 /* Entry not found for this transport */ 892 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 893 (char *)(void *)&relp); 894 /* 895 * XXX: should have perhaps returned with error but 896 * since the remote machine might not always be able 897 * to send the address on all transports, we try the 898 * regular way with regular_rpcbind 899 */ 900 goto regular_rpcbind; 901 } else if ((clnt_st == RPC_PROGVERSMISMATCH) || 902 (clnt_st == RPC_PROGUNAVAIL)) { 903 start_vers = RPCBVERS; /* Try version 3 now */ 904 goto regular_rpcbind; /* Try different versions */ 905 } else { 906 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 907 clnt_geterr(client, &rpc_createerr.cf_error); 908 goto error; 909 } 910 } 911 912 regular_rpcbind: 913 914 /* Now the same transport is to be used to get the address */ 915 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) || 916 (nconf->nc_semantics == NC_TPI_COTS))) { 917 /* A CLTS type of client - destroy it */ 918 CLNT_DESTROY(client); 919 client = NULL; 920 } 921 922 if (client == NULL) { 923 client = getclnthandle(host, nconf, &parms.r_addr); 924 if (client == NULL) { 925 goto error; 926 } 927 } 928 if (parms.r_addr == NULL) { 929 /*LINTED const castaway*/ 930 parms.r_addr = (char *) &nullstring[0]; 931 } 932 933 /* First try from start_vers and then version 3 (RPCBVERS) */ 934 935 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime); 936 for (vers = start_vers; vers >= RPCBVERS; vers--) { 937 /* Set the version */ 938 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 939 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR, 940 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 941 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp); 942 if (clnt_st == RPC_SUCCESS) { 943 if ((ua == NULL) || (ua[0] == 0)) { 944 /* address unknown */ 945 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 946 goto error; 947 } 948 address = uaddr2taddr(nconf, ua); 949 #ifdef ND_DEBUG 950 fprintf(stderr, "\tRemote address is [%s]\n", ua); 951 if (!address) 952 fprintf(stderr, 953 "\tCouldn't resolve remote address!\n"); 954 #endif 955 xdr_free((xdrproc_t)xdr_wrapstring, 956 (char *)(void *)&ua); 957 958 if (! address) { 959 /* We don't know about your universal address */ 960 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 961 goto error; 962 } 963 CLNT_CONTROL(client, CLGET_SVC_ADDR, 964 (char *)(void *)&servaddr); 965 __rpc_fixup_addr(address, &servaddr); 966 goto done; 967 } else if (clnt_st == RPC_PROGVERSMISMATCH) { 968 struct rpc_err rpcerr; 969 970 clnt_geterr(client, &rpcerr); 971 if (rpcerr.re_vers.low > RPCBVERS4) 972 goto error; /* a new version, can't handle */ 973 } else if (clnt_st != RPC_PROGUNAVAIL) { 974 /* Cant handle this error */ 975 rpc_createerr.cf_stat = clnt_st; 976 clnt_geterr(client, &rpc_createerr.cf_error); 977 goto error; 978 } 979 } 980 981 error: 982 if (client) { 983 CLNT_DESTROY(client); 984 client = NULL; 985 } 986 done: 987 if (nconf->nc_semantics != NC_TPI_CLTS) { 988 /* This client is the connectionless one */ 989 if (client) { 990 CLNT_DESTROY(client); 991 client = NULL; 992 } 993 } 994 if (clpp) { 995 *clpp = client; 996 } else if (client) { 997 CLNT_DESTROY(client); 998 } 999 if (parms.r_addr != NULL && parms.r_addr != nullstring) 1000 free(parms.r_addr); 1001 return (address); 1002 } 1003 1004 1005 /* 1006 * Find the mapped address for program, version. 1007 * Calls the rpcbind service remotely to do the lookup. 1008 * Uses the transport specified in nconf. 1009 * Returns FALSE (0) if no map exists, else returns 1. 1010 * 1011 * Assuming that the address is all properly allocated 1012 */ 1013 int 1014 rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf, 1015 struct netbuf *address, const char *host) 1016 { 1017 struct netbuf *na; 1018 1019 if ((na = __rpcb_findaddr_timed(program, version, 1020 (struct netconfig *) nconf, (char *) host, 1021 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL) 1022 return (FALSE); 1023 1024 if (na->len > address->maxlen) { 1025 /* Too long address */ 1026 free(na->buf); 1027 free(na); 1028 rpc_createerr.cf_stat = RPC_FAILED; 1029 return (FALSE); 1030 } 1031 memcpy(address->buf, na->buf, (size_t)na->len); 1032 address->len = na->len; 1033 free(na->buf); 1034 free(na); 1035 return (TRUE); 1036 } 1037 1038 /* 1039 * Get a copy of the current maps. 1040 * Calls the rpcbind service remotely to get the maps. 1041 * 1042 * It returns only a list of the services 1043 * It returns NULL on failure. 1044 */ 1045 rpcblist * 1046 rpcb_getmaps(const struct netconfig *nconf, const char *host) 1047 { 1048 rpcblist_ptr head = NULL; 1049 CLIENT *client; 1050 enum clnt_stat clnt_st; 1051 rpcvers_t vers = 0; 1052 1053 client = getclnthandle(host, nconf, NULL); 1054 if (client == NULL) { 1055 return (head); 1056 } 1057 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1058 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1059 (char *)(void *)&head, tottimeout); 1060 if (clnt_st == RPC_SUCCESS) 1061 goto done; 1062 1063 if ((clnt_st != RPC_PROGVERSMISMATCH) && 1064 (clnt_st != RPC_PROGUNAVAIL)) { 1065 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1066 clnt_geterr(client, &rpc_createerr.cf_error); 1067 goto done; 1068 } 1069 1070 /* fall back to earlier version */ 1071 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1072 if (vers == RPCBVERS4) { 1073 vers = RPCBVERS; 1074 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1075 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1076 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1077 (char *)(void *)&head, tottimeout) == RPC_SUCCESS) 1078 goto done; 1079 } 1080 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1081 clnt_geterr(client, &rpc_createerr.cf_error); 1082 1083 done: 1084 CLNT_DESTROY(client); 1085 return (head); 1086 } 1087 1088 /* 1089 * rpcbinder remote-call-service interface. 1090 * This routine is used to call the rpcbind remote call service 1091 * which will look up a service program in the address maps, and then 1092 * remotely call that routine with the given parameters. This allows 1093 * programs to do a lookup and call in one step. 1094 * 1095 * nconf -Netconfig structure 1096 * host - Remote host name 1097 * proc - Remote proc identifiers 1098 * xdrargs, xdrres; XDR routines 1099 * argsp, resp - Argument and Result 1100 * tout - Timeout value for this call 1101 * addr_ptr - Preallocated netbuf address 1102 */ 1103 enum clnt_stat 1104 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog, 1105 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp, 1106 xdrproc_t xdrres, caddr_t resp, struct timeval tout, 1107 const struct netbuf *addr_ptr) 1108 { 1109 CLIENT *client; 1110 enum clnt_stat stat; 1111 struct r_rpcb_rmtcallargs a; 1112 struct r_rpcb_rmtcallres r; 1113 rpcvers_t rpcb_vers; 1114 1115 stat = 0; 1116 client = getclnthandle(host, nconf, NULL); 1117 if (client == NULL) { 1118 return (RPC_FAILED); 1119 } 1120 /*LINTED const castaway*/ 1121 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout); 1122 a.prog = prog; 1123 a.vers = vers; 1124 a.proc = proc; 1125 a.args.args_val = argsp; 1126 a.xdr_args = xdrargs; 1127 r.addr = NULL; 1128 r.results.results_val = resp; 1129 r.xdr_res = xdrres; 1130 1131 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1132 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1133 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1134 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1135 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1136 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1137 struct netbuf *na; 1138 /*LINTED const castaway*/ 1139 na = uaddr2taddr((struct netconfig *) nconf, r.addr); 1140 if (!na) { 1141 stat = RPC_N2AXLATEFAILURE; 1142 /*LINTED const castaway*/ 1143 ((struct netbuf *) addr_ptr)->len = 0; 1144 goto error; 1145 } 1146 if (na->len > addr_ptr->maxlen) { 1147 /* Too long address */ 1148 stat = RPC_FAILED; /* XXX A better error no */ 1149 free(na->buf); 1150 free(na); 1151 /*LINTED const castaway*/ 1152 ((struct netbuf *) addr_ptr)->len = 0; 1153 goto error; 1154 } 1155 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1156 /*LINTED const castaway*/ 1157 ((struct netbuf *)addr_ptr)->len = na->len; 1158 free(na->buf); 1159 free(na); 1160 break; 1161 } else if ((stat != RPC_PROGVERSMISMATCH) && 1162 (stat != RPC_PROGUNAVAIL)) { 1163 goto error; 1164 } 1165 } 1166 error: 1167 CLNT_DESTROY(client); 1168 if (r.addr) 1169 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1170 return (stat); 1171 } 1172 1173 /* 1174 * Gets the time on the remote host. 1175 * Returns 1 if succeeds else 0. 1176 */ 1177 bool_t 1178 rpcb_gettime(const char *host, time_t *timep) 1179 { 1180 CLIENT *client = NULL; 1181 void *handle; 1182 struct netconfig *nconf; 1183 rpcvers_t vers; 1184 enum clnt_stat st; 1185 1186 1187 if ((host == NULL) || (host[0] == 0)) { 1188 time(timep); 1189 return (TRUE); 1190 } 1191 1192 if ((handle = __rpc_setconf("netpath")) == NULL) { 1193 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1194 return (FALSE); 1195 } 1196 rpc_createerr.cf_stat = RPC_SUCCESS; 1197 while (client == NULL) { 1198 if ((nconf = __rpc_getconf(handle)) == NULL) { 1199 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1200 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1201 break; 1202 } 1203 client = getclnthandle(host, nconf, NULL); 1204 if (client) 1205 break; 1206 } 1207 __rpc_endconf(handle); 1208 if (client == (CLIENT *) NULL) { 1209 return (FALSE); 1210 } 1211 1212 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1213 (xdrproc_t) xdr_void, NULL, 1214 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1215 1216 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1217 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1218 if (vers == RPCBVERS4) { 1219 /* fall back to earlier version */ 1220 vers = RPCBVERS; 1221 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1222 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1223 (xdrproc_t) xdr_void, NULL, 1224 (xdrproc_t) xdr_int, (char *)(void *)timep, 1225 tottimeout); 1226 } 1227 } 1228 CLNT_DESTROY(client); 1229 return (st == RPC_SUCCESS? TRUE: FALSE); 1230 } 1231 1232 /* 1233 * Converts taddr to universal address. This routine should never 1234 * really be called because local n2a libraries are always provided. 1235 */ 1236 char * 1237 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr) 1238 { 1239 CLIENT *client; 1240 char *uaddr = NULL; 1241 1242 1243 /* parameter checking */ 1244 if (nconf == NULL) { 1245 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1246 return (NULL); 1247 } 1248 if (taddr == NULL) { 1249 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1250 return (NULL); 1251 } 1252 client = local_rpcb(); 1253 if (! client) { 1254 return (NULL); 1255 } 1256 1257 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1258 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1259 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout); 1260 CLNT_DESTROY(client); 1261 return (uaddr); 1262 } 1263 1264 /* 1265 * Converts universal address to netbuf. This routine should never 1266 * really be called because local n2a libraries are always provided. 1267 */ 1268 struct netbuf * 1269 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr) 1270 { 1271 CLIENT *client; 1272 struct netbuf *taddr; 1273 1274 1275 /* parameter checking */ 1276 if (nconf == NULL) { 1277 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1278 return (NULL); 1279 } 1280 if (uaddr == NULL) { 1281 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1282 return (NULL); 1283 } 1284 client = local_rpcb(); 1285 if (! client) { 1286 return (NULL); 1287 } 1288 1289 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1290 if (taddr == NULL) { 1291 CLNT_DESTROY(client); 1292 return (NULL); 1293 } 1294 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1295 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1296 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1297 tottimeout) != RPC_SUCCESS) { 1298 free(taddr); 1299 taddr = NULL; 1300 } 1301 CLNT_DESTROY(client); 1302 return (taddr); 1303 } 1304