1 /* $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2010, Oracle America, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials 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 "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */ 34 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro"; 38 #endif 39 /* 40 * rpcb_clnt.c 41 * interface to rpcbind rpc service. 42 */ 43 44 #include "namespace.h" 45 #include "reentrant.h" 46 #include <sys/types.h> 47 #include <sys/socket.h> 48 #include <sys/un.h> 49 #include <sys/utsname.h> 50 #include <rpc/rpc.h> 51 #include <rpc/rpcb_prot.h> 52 #include <rpc/nettype.h> 53 #include <netconfig.h> 54 #ifdef PORTMAP 55 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */ 56 #include <rpc/pmap_prot.h> 57 #endif /* PORTMAP */ 58 #include <stdio.h> 59 #include <errno.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 #include <netdb.h> 64 #include <syslog.h> 65 #include "un-namespace.h" 66 67 #include "rpc_com.h" 68 #include "mt_misc.h" 69 70 static struct timeval tottimeout = { 60, 0 }; 71 static const struct timeval rmttimeout = { 3, 0 }; 72 static struct timeval rpcbrmttime = { 15, 0 }; 73 74 extern bool_t xdr_wrapstring(XDR *, char **); 75 76 static const char nullstring[] = "\000"; 77 78 #define CACHESIZE 6 79 80 struct address_cache { 81 char *ac_host; 82 char *ac_netid; 83 char *ac_uaddr; 84 struct netbuf *ac_taddr; 85 struct address_cache *ac_next; 86 }; 87 88 static struct address_cache *front; 89 static int cachesize; 90 91 #define CLCR_GET_RPCB_TIMEOUT 1 92 #define CLCR_SET_RPCB_TIMEOUT 2 93 94 95 extern int __rpc_lowvers; 96 97 static struct address_cache *check_cache(const char *, const char *); 98 static void delete_cache(struct netbuf *); 99 static void add_cache(const char *, const char *, struct netbuf *, char *); 100 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **); 101 static CLIENT *local_rpcb(void); 102 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *); 103 104 /* 105 * This routine adjusts the timeout used for calls to the remote rpcbind. 106 * Also, this routine can be used to set the use of portmapper version 2 107 * only when doing rpc_broadcasts 108 * These are private routines that may not be provided in future releases. 109 */ 110 bool_t 111 __rpc_control(int request, void *info) 112 { 113 switch (request) { 114 case CLCR_GET_RPCB_TIMEOUT: 115 *(struct timeval *)info = tottimeout; 116 break; 117 case CLCR_SET_RPCB_TIMEOUT: 118 tottimeout = *(struct timeval *)info; 119 break; 120 case CLCR_SET_LOWVERS: 121 __rpc_lowvers = *(int *)info; 122 break; 123 case CLCR_GET_LOWVERS: 124 *(int *)info = __rpc_lowvers; 125 break; 126 default: 127 return (FALSE); 128 } 129 return (TRUE); 130 } 131 132 /* 133 * It might seem that a reader/writer lock would be more reasonable here. 134 * However because getclnthandle(), the only user of the cache functions, 135 * may do a delete_cache() operation if a check_cache() fails to return an 136 * address useful to clnt_tli_create(), we may as well use a mutex. 137 */ 138 /* 139 * As it turns out, if the cache lock is *not* a reader/writer lock, we will 140 * block all clnt_create's if we are trying to connect to a host that's down, 141 * since the lock will be held all during that time. 142 */ 143 144 /* 145 * The routines check_cache(), add_cache(), delete_cache() manage the 146 * cache of rpcbind addresses for (host, netid). 147 */ 148 149 static struct address_cache * 150 check_cache(const char *host, const char *netid) 151 { 152 struct address_cache *cptr; 153 154 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 155 156 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 157 if (!strcmp(cptr->ac_host, host) && 158 !strcmp(cptr->ac_netid, netid)) { 159 #ifdef ND_DEBUG 160 fprintf(stderr, "Found cache entry for %s: %s\n", 161 host, netid); 162 #endif 163 return (cptr); 164 } 165 } 166 return ((struct address_cache *) NULL); 167 } 168 169 static void 170 delete_cache(struct netbuf *addr) 171 { 172 struct address_cache *cptr, *prevptr = NULL; 173 174 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 175 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 176 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) { 177 free(cptr->ac_host); 178 free(cptr->ac_netid); 179 free(cptr->ac_taddr->buf); 180 free(cptr->ac_taddr); 181 free(cptr->ac_uaddr); 182 if (prevptr) 183 prevptr->ac_next = cptr->ac_next; 184 else 185 front = cptr->ac_next; 186 free(cptr); 187 cachesize--; 188 break; 189 } 190 prevptr = cptr; 191 } 192 } 193 194 static void 195 add_cache(const char *host, const char *netid, struct netbuf *taddr, 196 char *uaddr) 197 { 198 struct address_cache *ad_cache, *cptr, *prevptr; 199 200 ad_cache = (struct address_cache *) 201 malloc(sizeof (struct address_cache)); 202 if (!ad_cache) { 203 return; 204 } 205 ad_cache->ac_host = strdup(host); 206 ad_cache->ac_netid = strdup(netid); 207 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL; 208 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf)); 209 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr || 210 (uaddr && !ad_cache->ac_uaddr)) { 211 goto out; 212 } 213 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len; 214 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len); 215 if (ad_cache->ac_taddr->buf == NULL) { 216 out: 217 free(ad_cache->ac_host); 218 free(ad_cache->ac_netid); 219 free(ad_cache->ac_uaddr); 220 free(ad_cache->ac_taddr); 221 free(ad_cache); 222 return; 223 } 224 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len); 225 #ifdef ND_DEBUG 226 fprintf(stderr, "Added to cache: %s : %s\n", host, netid); 227 #endif 228 229 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */ 230 231 rwlock_wrlock(&rpcbaddr_cache_lock); 232 if (cachesize < CACHESIZE) { 233 ad_cache->ac_next = front; 234 front = ad_cache; 235 cachesize++; 236 } else { 237 /* Free the last entry */ 238 cptr = front; 239 prevptr = NULL; 240 while (cptr->ac_next) { 241 prevptr = cptr; 242 cptr = cptr->ac_next; 243 } 244 245 #ifdef ND_DEBUG 246 fprintf(stderr, "Deleted from cache: %s : %s\n", 247 cptr->ac_host, cptr->ac_netid); 248 #endif 249 free(cptr->ac_host); 250 free(cptr->ac_netid); 251 free(cptr->ac_taddr->buf); 252 free(cptr->ac_taddr); 253 free(cptr->ac_uaddr); 254 255 if (prevptr) { 256 prevptr->ac_next = NULL; 257 ad_cache->ac_next = front; 258 front = ad_cache; 259 } else { 260 front = ad_cache; 261 ad_cache->ac_next = NULL; 262 } 263 free(cptr); 264 } 265 rwlock_unlock(&rpcbaddr_cache_lock); 266 } 267 268 /* 269 * This routine will return a client handle that is connected to the 270 * rpcbind. If targaddr is non-NULL, the "universal address" of the 271 * host will be stored in *targaddr; the caller is responsible for 272 * freeing this string. 273 * On error, returns NULL and free's everything. 274 */ 275 static CLIENT * 276 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr) 277 { 278 CLIENT *client; 279 struct netbuf *addr, taddr; 280 struct netbuf addr_to_delete; 281 struct __rpc_sockinfo si; 282 struct addrinfo hints, *res, *tres; 283 struct address_cache *ad_cache; 284 char *tmpaddr; 285 286 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */ 287 288 /* Get the address of the rpcbind. Check cache first */ 289 client = NULL; 290 addr_to_delete.len = 0; 291 rwlock_rdlock(&rpcbaddr_cache_lock); 292 ad_cache = NULL; 293 if (host != NULL) 294 ad_cache = check_cache(host, nconf->nc_netid); 295 if (ad_cache != NULL) { 296 addr = ad_cache->ac_taddr; 297 client = clnt_tli_create(RPC_ANYFD, nconf, addr, 298 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 299 if (client != NULL) { 300 if (targaddr) 301 *targaddr = strdup(ad_cache->ac_uaddr); 302 rwlock_unlock(&rpcbaddr_cache_lock); 303 return (client); 304 } 305 addr_to_delete.len = addr->len; 306 addr_to_delete.buf = (char *)malloc(addr->len); 307 if (addr_to_delete.buf == NULL) { 308 addr_to_delete.len = 0; 309 } else { 310 memcpy(addr_to_delete.buf, addr->buf, addr->len); 311 } 312 } 313 rwlock_unlock(&rpcbaddr_cache_lock); 314 if (addr_to_delete.len != 0) { 315 /* 316 * Assume this may be due to cache data being 317 * outdated 318 */ 319 rwlock_wrlock(&rpcbaddr_cache_lock); 320 delete_cache(&addr_to_delete); 321 rwlock_unlock(&rpcbaddr_cache_lock); 322 free(addr_to_delete.buf); 323 } 324 if (!__rpc_nconf2sockinfo(nconf, &si)) { 325 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 326 return NULL; 327 } 328 329 memset(&hints, 0, sizeof hints); 330 hints.ai_family = si.si_af; 331 hints.ai_socktype = si.si_socktype; 332 hints.ai_protocol = si.si_proto; 333 334 #ifdef CLNT_DEBUG 335 printf("trying netid %s family %d proto %d socktype %d\n", 336 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype); 337 #endif 338 339 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 340 client = local_rpcb(); 341 if (! client) { 342 #ifdef ND_DEBUG 343 clnt_pcreateerror("rpcbind clnt interface"); 344 #endif 345 return (NULL); 346 } else { 347 struct sockaddr_un sun; 348 if (targaddr) { 349 *targaddr = malloc(sizeof(sun.sun_path)); 350 if (*targaddr == NULL) { 351 CLNT_DESTROY(client); 352 return (NULL); 353 } 354 strncpy(*targaddr, _PATH_RPCBINDSOCK, 355 sizeof(sun.sun_path)); 356 } 357 return (client); 358 } 359 } else { 360 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) { 361 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 362 return NULL; 363 } 364 } 365 366 for (tres = res; tres != NULL; tres = tres->ai_next) { 367 taddr.buf = tres->ai_addr; 368 taddr.len = taddr.maxlen = tres->ai_addrlen; 369 370 #ifdef ND_DEBUG 371 { 372 char *ua; 373 374 ua = taddr2uaddr(nconf, &taddr); 375 fprintf(stderr, "Got it [%s]\n", ua); 376 free(ua); 377 } 378 #endif 379 380 #ifdef ND_DEBUG 381 { 382 int i; 383 384 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n", 385 taddr.len, taddr.maxlen); 386 fprintf(stderr, "\tAddress is "); 387 for (i = 0; i < taddr.len; i++) 388 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]); 389 fprintf(stderr, "\n"); 390 } 391 #endif 392 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr, 393 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 394 #ifdef ND_DEBUG 395 if (! client) { 396 clnt_pcreateerror("rpcbind clnt interface"); 397 } 398 #endif 399 400 if (client) { 401 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL; 402 add_cache(host, nconf->nc_netid, &taddr, tmpaddr); 403 if (targaddr) 404 *targaddr = tmpaddr; 405 break; 406 } 407 } 408 if (res) 409 freeaddrinfo(res); 410 return (client); 411 } 412 413 /* XXX */ 414 #define IN4_LOCALHOST_STRING "127.0.0.1" 415 #define IN6_LOCALHOST_STRING "::1" 416 417 /* 418 * This routine will return a client handle that is connected to the local 419 * rpcbind. Returns NULL on error and free's everything. 420 */ 421 static CLIENT * 422 local_rpcb(void) 423 { 424 CLIENT *client; 425 static struct netconfig *loopnconf; 426 static char *hostname; 427 int sock; 428 size_t tsize; 429 struct netbuf nbuf; 430 struct sockaddr_un sun; 431 432 /* 433 * Try connecting to the local rpcbind through a local socket 434 * first. If this doesn't work, try all transports defined in 435 * the netconfig file. 436 */ 437 memset(&sun, 0, sizeof sun); 438 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 439 if (sock < 0) 440 goto try_nconf; 441 sun.sun_family = AF_LOCAL; 442 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 443 nbuf.len = sun.sun_len = SUN_LEN(&sun); 444 nbuf.maxlen = sizeof (struct sockaddr_un); 445 nbuf.buf = &sun; 446 447 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0); 448 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG, 449 (rpcvers_t)RPCBVERS, tsize, tsize); 450 451 if (client != NULL) { 452 /* Mark the socket to be closed in destructor */ 453 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL); 454 return client; 455 } 456 457 /* Nobody needs this socket anymore; free the descriptor. */ 458 _close(sock); 459 460 try_nconf: 461 462 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */ 463 mutex_lock(&loopnconf_lock); 464 if (loopnconf == NULL) { 465 struct netconfig *nconf, *tmpnconf = NULL; 466 void *nc_handle; 467 int fd; 468 469 nc_handle = setnetconfig(); 470 if (nc_handle == NULL) { 471 /* fails to open netconfig file */ 472 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 473 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 474 mutex_unlock(&loopnconf_lock); 475 return (NULL); 476 } 477 while ((nconf = getnetconfig(nc_handle)) != NULL) { 478 #ifdef INET6 479 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 || 480 #else 481 if (( 482 #endif 483 strcmp(nconf->nc_protofmly, NC_INET) == 0) && 484 (nconf->nc_semantics == NC_TPI_COTS || 485 nconf->nc_semantics == NC_TPI_COTS_ORD)) { 486 fd = __rpc_nconf2fd(nconf); 487 /* 488 * Can't create a socket, assume that 489 * this family isn't configured in the kernel. 490 */ 491 if (fd < 0) 492 continue; 493 _close(fd); 494 tmpnconf = nconf; 495 if (!strcmp(nconf->nc_protofmly, NC_INET)) 496 hostname = IN4_LOCALHOST_STRING; 497 else 498 hostname = IN6_LOCALHOST_STRING; 499 } 500 } 501 if (tmpnconf == NULL) { 502 endnetconfig(nc_handle); 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 endnetconfig(localhandle); 665 666 if (nconf == NULL) 667 return (FALSE); 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 * The comment below is now very old, having 743 * been committed to FreeBSD during an import 744 * from NetBSD in 2001. I do not believe there 745 * will still be any rpcbind servers that do 746 * UDP only and, since Azure requires use of 747 * TCP for NFSv3 mounts, comment this out 748 * so that NFSv3 mounts on Azure can work. 749 */ 750 #ifdef notnow 751 /* 752 * Try UDP only - there are some portmappers out 753 * there that use UDP only. 754 */ 755 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 756 struct netconfig *newnconf; 757 758 if ((newnconf = getnetconfigent("udp")) == NULL) { 759 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 760 return (NULL); 761 } 762 client = getclnthandle(host, newnconf, &parms.r_addr); 763 freenetconfigent(newnconf); 764 } else 765 #endif 766 client = getclnthandle(host, nconf, &parms.r_addr); 767 if (client == NULL) 768 return (NULL); 769 770 /* 771 * Set version and retry timeout. 772 */ 773 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 774 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers); 775 776 pmapparms.pm_prog = program; 777 pmapparms.pm_vers = version; 778 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 779 IPPROTO_UDP : IPPROTO_TCP; 780 pmapparms.pm_port = 0; /* not needed */ 781 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 782 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 783 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 784 *tp); 785 if (clnt_st != RPC_SUCCESS) { 786 if ((clnt_st == RPC_PROGVERSMISMATCH) || 787 (clnt_st == RPC_PROGUNAVAIL)) 788 goto try_rpcbind; /* Try different versions */ 789 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 790 clnt_geterr(client, &rpc_createerr.cf_error); 791 goto error; 792 } else if (port == 0) { 793 address = NULL; 794 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 795 goto error; 796 } 797 port = htons(port); 798 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote); 799 if (((address = (struct netbuf *) 800 malloc(sizeof (struct netbuf))) == NULL) || 801 ((address->buf = (char *) 802 malloc(remote.len)) == NULL)) { 803 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 804 clnt_geterr(client, &rpc_createerr.cf_error); 805 free(address); 806 address = NULL; 807 goto error; 808 } 809 memcpy(address->buf, remote.buf, remote.len); 810 memcpy(&((char *)address->buf)[sizeof (short)], 811 (char *)(void *)&port, sizeof (short)); 812 address->len = address->maxlen = remote.len; 813 goto done; 814 } 815 #endif /* PORTMAP */ 816 817 try_rpcbind: 818 /* 819 * Check if rpcbind is up. This prevents needless delays when 820 * accessing applications such as the keyserver while booting 821 * disklessly. 822 */ 823 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 824 if (!__rpcbind_is_up()) { 825 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 826 rpc_createerr.cf_error.re_errno = 0; 827 goto error; 828 } 829 check_rpcbind = FALSE; 830 } 831 832 /* 833 * Now we try version 4 and then 3. 834 * We also send the remote system the address we used to 835 * contact it in case it can help to connect back with us 836 */ 837 parms.r_prog = program; 838 parms.r_vers = version; 839 /*LINTED const castaway*/ 840 parms.r_owner = (char *) &nullstring[0]; /* not needed; */ 841 /* just for xdring */ 842 parms.r_netid = nconf->nc_netid; /* not really needed */ 843 844 /* 845 * If a COTS transport is being used, try getting address via CLTS 846 * transport. This works only with version 4. 847 */ 848 if (nconf->nc_semantics == NC_TPI_COTS_ORD || 849 nconf->nc_semantics == NC_TPI_COTS) { 850 851 void *handle; 852 struct netconfig *nconf_clts; 853 rpcb_entry_list_ptr relp = NULL; 854 855 if (client == NULL) { 856 /* This did not go through the above PORTMAP/TCP code */ 857 if ((handle = __rpc_setconf("datagram_v")) != NULL) { 858 while ((nconf_clts = __rpc_getconf(handle)) 859 != NULL) { 860 if (strcmp(nconf_clts->nc_protofmly, 861 nconf->nc_protofmly) != 0) { 862 continue; 863 } 864 client = getclnthandle(host, nconf_clts, 865 &parms.r_addr); 866 break; 867 } 868 __rpc_endconf(handle); 869 } 870 if (client == NULL) 871 goto regular_rpcbind; /* Go the regular way */ 872 } else { 873 /* This is a UDP PORTMAP handle. Change to version 4 */ 874 vers = RPCBVERS4; 875 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 876 } 877 /* 878 * We also send the remote system the address we used to 879 * contact it in case it can help it connect back with us 880 */ 881 if (parms.r_addr == NULL) { 882 /*LINTED const castaway*/ 883 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */ 884 } 885 886 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 887 888 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST, 889 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 890 (xdrproc_t) xdr_rpcb_entry_list_ptr, 891 (char *)(void *)&relp, *tp); 892 if (clnt_st == RPC_SUCCESS) { 893 if ((address = got_entry(relp, nconf)) != NULL) { 894 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 895 (char *)(void *)&relp); 896 CLNT_CONTROL(client, CLGET_SVC_ADDR, 897 (char *)(void *)&servaddr); 898 __rpc_fixup_addr(address, &servaddr); 899 goto done; 900 } 901 /* Entry not found for this transport */ 902 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 903 (char *)(void *)&relp); 904 /* 905 * XXX: should have perhaps returned with error but 906 * since the remote machine might not always be able 907 * to send the address on all transports, we try the 908 * regular way with regular_rpcbind 909 */ 910 goto regular_rpcbind; 911 } else if ((clnt_st == RPC_PROGVERSMISMATCH) || 912 (clnt_st == RPC_PROGUNAVAIL)) { 913 start_vers = RPCBVERS; /* Try version 3 now */ 914 goto regular_rpcbind; /* Try different versions */ 915 } else { 916 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 917 clnt_geterr(client, &rpc_createerr.cf_error); 918 goto error; 919 } 920 } 921 922 regular_rpcbind: 923 924 /* Now the same transport is to be used to get the address */ 925 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) || 926 (nconf->nc_semantics == NC_TPI_COTS))) { 927 /* A CLTS type of client - destroy it */ 928 CLNT_DESTROY(client); 929 client = NULL; 930 } 931 932 if (client == NULL) { 933 client = getclnthandle(host, nconf, &parms.r_addr); 934 if (client == NULL) { 935 goto error; 936 } 937 } 938 if (parms.r_addr == NULL) { 939 /*LINTED const castaway*/ 940 parms.r_addr = (char *) &nullstring[0]; 941 } 942 943 /* First try from start_vers and then version 3 (RPCBVERS) */ 944 945 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime); 946 for (vers = start_vers; vers >= RPCBVERS; vers--) { 947 /* Set the version */ 948 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 949 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR, 950 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 951 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp); 952 if (clnt_st == RPC_SUCCESS) { 953 if ((ua == NULL) || (ua[0] == 0)) { 954 /* address unknown */ 955 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 956 goto error; 957 } 958 address = uaddr2taddr(nconf, ua); 959 #ifdef ND_DEBUG 960 fprintf(stderr, "\tRemote address is [%s]\n", ua); 961 if (!address) 962 fprintf(stderr, 963 "\tCouldn't resolve remote address!\n"); 964 #endif 965 xdr_free((xdrproc_t)xdr_wrapstring, 966 (char *)(void *)&ua); 967 968 if (! address) { 969 /* We don't know about your universal address */ 970 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 971 goto error; 972 } 973 CLNT_CONTROL(client, CLGET_SVC_ADDR, 974 (char *)(void *)&servaddr); 975 __rpc_fixup_addr(address, &servaddr); 976 goto done; 977 } else if (clnt_st == RPC_PROGVERSMISMATCH) { 978 struct rpc_err rpcerr; 979 980 clnt_geterr(client, &rpcerr); 981 if (rpcerr.re_vers.low > RPCBVERS4) 982 goto error; /* a new version, can't handle */ 983 } else if (clnt_st != RPC_PROGUNAVAIL) { 984 /* Cant handle this error */ 985 rpc_createerr.cf_stat = clnt_st; 986 clnt_geterr(client, &rpc_createerr.cf_error); 987 goto error; 988 } 989 } 990 991 error: 992 if (client) { 993 CLNT_DESTROY(client); 994 client = NULL; 995 } 996 done: 997 if (nconf->nc_semantics != NC_TPI_CLTS) { 998 /* This client is the connectionless one */ 999 if (client) { 1000 CLNT_DESTROY(client); 1001 client = NULL; 1002 } 1003 } 1004 if (clpp) { 1005 *clpp = client; 1006 } else if (client) { 1007 CLNT_DESTROY(client); 1008 } 1009 if (parms.r_addr != NULL && parms.r_addr != nullstring) 1010 free(parms.r_addr); 1011 return (address); 1012 } 1013 1014 1015 /* 1016 * Find the mapped address for program, version. 1017 * Calls the rpcbind service remotely to do the lookup. 1018 * Uses the transport specified in nconf. 1019 * Returns FALSE (0) if no map exists, else returns 1. 1020 * 1021 * Assuming that the address is all properly allocated 1022 */ 1023 bool_t 1024 rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf, 1025 struct netbuf *address, const char *host) 1026 { 1027 struct netbuf *na; 1028 1029 if ((na = __rpcb_findaddr_timed(program, version, 1030 (struct netconfig *) nconf, (char *) host, 1031 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL) 1032 return (FALSE); 1033 1034 if (na->len > address->maxlen) { 1035 /* Too long address */ 1036 free(na->buf); 1037 free(na); 1038 rpc_createerr.cf_stat = RPC_FAILED; 1039 return (FALSE); 1040 } 1041 memcpy(address->buf, na->buf, (size_t)na->len); 1042 address->len = na->len; 1043 free(na->buf); 1044 free(na); 1045 return (TRUE); 1046 } 1047 1048 /* 1049 * Get a copy of the current maps. 1050 * Calls the rpcbind service remotely to get the maps. 1051 * 1052 * It returns only a list of the services 1053 * It returns NULL on failure. 1054 */ 1055 rpcblist * 1056 rpcb_getmaps(const struct netconfig *nconf, const char *host) 1057 { 1058 rpcblist_ptr head = NULL; 1059 CLIENT *client; 1060 enum clnt_stat clnt_st; 1061 rpcvers_t vers = 0; 1062 1063 client = getclnthandle(host, nconf, NULL); 1064 if (client == NULL) { 1065 return (head); 1066 } 1067 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1068 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1069 (char *)(void *)&head, tottimeout); 1070 if (clnt_st == RPC_SUCCESS) 1071 goto done; 1072 1073 if ((clnt_st != RPC_PROGVERSMISMATCH) && 1074 (clnt_st != RPC_PROGUNAVAIL)) { 1075 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1076 clnt_geterr(client, &rpc_createerr.cf_error); 1077 goto done; 1078 } 1079 1080 /* fall back to earlier version */ 1081 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1082 if (vers == RPCBVERS4) { 1083 vers = RPCBVERS; 1084 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1085 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1086 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1087 (char *)(void *)&head, tottimeout) == RPC_SUCCESS) 1088 goto done; 1089 } 1090 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1091 clnt_geterr(client, &rpc_createerr.cf_error); 1092 1093 done: 1094 CLNT_DESTROY(client); 1095 return (head); 1096 } 1097 1098 /* 1099 * rpcbinder remote-call-service interface. 1100 * This routine is used to call the rpcbind remote call service 1101 * which will look up a service program in the address maps, and then 1102 * remotely call that routine with the given parameters. This allows 1103 * programs to do a lookup and call in one step. 1104 * 1105 * nconf -Netconfig structure 1106 * host - Remote host name 1107 * proc - Remote proc identifiers 1108 * xdrargs, xdrres; XDR routines 1109 * argsp, resp - Argument and Result 1110 * tout - Timeout value for this call 1111 * addr_ptr - Preallocated netbuf address 1112 */ 1113 enum clnt_stat 1114 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog, 1115 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp, 1116 xdrproc_t xdrres, caddr_t resp, struct timeval tout, 1117 const struct netbuf *addr_ptr) 1118 { 1119 CLIENT *client; 1120 enum clnt_stat stat; 1121 struct r_rpcb_rmtcallargs a; 1122 struct r_rpcb_rmtcallres r; 1123 rpcvers_t rpcb_vers; 1124 1125 stat = 0; 1126 client = getclnthandle(host, nconf, NULL); 1127 if (client == NULL) { 1128 return (RPC_FAILED); 1129 } 1130 /*LINTED const castaway*/ 1131 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout); 1132 a.prog = prog; 1133 a.vers = vers; 1134 a.proc = proc; 1135 a.args.args_val = argsp; 1136 a.xdr_args = xdrargs; 1137 r.addr = NULL; 1138 r.results.results_val = resp; 1139 r.xdr_res = xdrres; 1140 1141 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1142 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1143 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1144 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1145 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1146 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1147 struct netbuf *na; 1148 /*LINTED const castaway*/ 1149 na = uaddr2taddr((struct netconfig *) nconf, r.addr); 1150 if (!na) { 1151 stat = RPC_N2AXLATEFAILURE; 1152 /*LINTED const castaway*/ 1153 ((struct netbuf *) addr_ptr)->len = 0; 1154 goto error; 1155 } 1156 if (na->len > addr_ptr->maxlen) { 1157 /* Too long address */ 1158 stat = RPC_FAILED; /* XXX A better error no */ 1159 free(na->buf); 1160 free(na); 1161 /*LINTED const castaway*/ 1162 ((struct netbuf *) addr_ptr)->len = 0; 1163 goto error; 1164 } 1165 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1166 /*LINTED const castaway*/ 1167 ((struct netbuf *)addr_ptr)->len = na->len; 1168 free(na->buf); 1169 free(na); 1170 break; 1171 } else if ((stat != RPC_PROGVERSMISMATCH) && 1172 (stat != RPC_PROGUNAVAIL)) { 1173 goto error; 1174 } 1175 } 1176 error: 1177 CLNT_DESTROY(client); 1178 if (r.addr) 1179 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1180 return (stat); 1181 } 1182 1183 /* 1184 * Gets the time on the remote host. 1185 * Returns 1 if succeeds else 0. 1186 */ 1187 bool_t 1188 rpcb_gettime(const char *host, time_t *timep) 1189 { 1190 CLIENT *client = NULL; 1191 void *handle; 1192 struct netconfig *nconf; 1193 rpcvers_t vers; 1194 enum clnt_stat st; 1195 1196 1197 if ((host == NULL) || (host[0] == 0)) { 1198 time(timep); 1199 return (TRUE); 1200 } 1201 1202 if ((handle = __rpc_setconf("netpath")) == NULL) { 1203 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1204 return (FALSE); 1205 } 1206 rpc_createerr.cf_stat = RPC_SUCCESS; 1207 while (client == NULL) { 1208 if ((nconf = __rpc_getconf(handle)) == NULL) { 1209 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1210 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1211 break; 1212 } 1213 client = getclnthandle(host, nconf, NULL); 1214 if (client) 1215 break; 1216 } 1217 __rpc_endconf(handle); 1218 if (client == (CLIENT *) NULL) { 1219 return (FALSE); 1220 } 1221 1222 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1223 (xdrproc_t) xdr_void, NULL, 1224 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1225 1226 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1227 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1228 if (vers == RPCBVERS4) { 1229 /* fall back to earlier version */ 1230 vers = RPCBVERS; 1231 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1232 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1233 (xdrproc_t) xdr_void, NULL, 1234 (xdrproc_t) xdr_int, (char *)(void *)timep, 1235 tottimeout); 1236 } 1237 } 1238 CLNT_DESTROY(client); 1239 return (st == RPC_SUCCESS? TRUE: FALSE); 1240 } 1241 1242 /* 1243 * Converts taddr to universal address. This routine should never 1244 * really be called because local n2a libraries are always provided. 1245 */ 1246 char * 1247 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr) 1248 { 1249 CLIENT *client; 1250 char *uaddr = NULL; 1251 1252 1253 /* parameter checking */ 1254 if (nconf == NULL) { 1255 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1256 return (NULL); 1257 } 1258 if (taddr == NULL) { 1259 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1260 return (NULL); 1261 } 1262 client = local_rpcb(); 1263 if (! client) { 1264 return (NULL); 1265 } 1266 1267 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1268 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1269 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout); 1270 CLNT_DESTROY(client); 1271 return (uaddr); 1272 } 1273 1274 /* 1275 * Converts universal address to netbuf. This routine should never 1276 * really be called because local n2a libraries are always provided. 1277 */ 1278 struct netbuf * 1279 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr) 1280 { 1281 CLIENT *client; 1282 struct netbuf *taddr; 1283 1284 1285 /* parameter checking */ 1286 if (nconf == NULL) { 1287 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1288 return (NULL); 1289 } 1290 if (uaddr == NULL) { 1291 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1292 return (NULL); 1293 } 1294 client = local_rpcb(); 1295 if (! client) { 1296 return (NULL); 1297 } 1298 1299 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1300 if (taddr == NULL) { 1301 CLNT_DESTROY(client); 1302 return (NULL); 1303 } 1304 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1305 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1306 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1307 tottimeout) != RPC_SUCCESS) { 1308 free(taddr); 1309 taddr = NULL; 1310 } 1311 CLNT_DESTROY(client); 1312 return (taddr); 1313 } 1314