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 if (cptr->ac_uaddr) 183 free(cptr->ac_uaddr); 184 if (prevptr) 185 prevptr->ac_next = cptr->ac_next; 186 else 187 front = cptr->ac_next; 188 free(cptr); 189 cachesize--; 190 break; 191 } 192 prevptr = cptr; 193 } 194 } 195 196 static void 197 add_cache(host, netid, taddr, uaddr) 198 const char *host, *netid; 199 char *uaddr; 200 struct netbuf *taddr; 201 { 202 struct address_cache *ad_cache, *cptr, *prevptr; 203 204 ad_cache = (struct address_cache *) 205 malloc(sizeof (struct address_cache)); 206 if (!ad_cache) { 207 return; 208 } 209 ad_cache->ac_host = strdup(host); 210 ad_cache->ac_netid = strdup(netid); 211 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL; 212 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf)); 213 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr || 214 (uaddr && !ad_cache->ac_uaddr)) { 215 goto out; 216 } 217 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len; 218 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len); 219 if (ad_cache->ac_taddr->buf == NULL) { 220 out: 221 if (ad_cache->ac_host) 222 free(ad_cache->ac_host); 223 if (ad_cache->ac_netid) 224 free(ad_cache->ac_netid); 225 if (ad_cache->ac_uaddr) 226 free(ad_cache->ac_uaddr); 227 if (ad_cache->ac_taddr) 228 free(ad_cache->ac_taddr); 229 free(ad_cache); 230 return; 231 } 232 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len); 233 #ifdef ND_DEBUG 234 fprintf(stderr, "Added to cache: %s : %s\n", host, netid); 235 #endif 236 237 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */ 238 239 rwlock_wrlock(&rpcbaddr_cache_lock); 240 if (cachesize < CACHESIZE) { 241 ad_cache->ac_next = front; 242 front = ad_cache; 243 cachesize++; 244 } else { 245 /* Free the last entry */ 246 cptr = front; 247 prevptr = NULL; 248 while (cptr->ac_next) { 249 prevptr = cptr; 250 cptr = cptr->ac_next; 251 } 252 253 #ifdef ND_DEBUG 254 fprintf(stderr, "Deleted from cache: %s : %s\n", 255 cptr->ac_host, cptr->ac_netid); 256 #endif 257 free(cptr->ac_host); 258 free(cptr->ac_netid); 259 free(cptr->ac_taddr->buf); 260 free(cptr->ac_taddr); 261 if (cptr->ac_uaddr) 262 free(cptr->ac_uaddr); 263 264 if (prevptr) { 265 prevptr->ac_next = NULL; 266 ad_cache->ac_next = front; 267 front = ad_cache; 268 } else { 269 front = ad_cache; 270 ad_cache->ac_next = NULL; 271 } 272 free(cptr); 273 } 274 rwlock_unlock(&rpcbaddr_cache_lock); 275 } 276 277 /* 278 * This routine will return a client handle that is connected to the 279 * rpcbind. If targaddr is non-NULL, the "universal address" of the 280 * host will be stored in *targaddr; the caller is responsible for 281 * freeing this string. 282 * On error, returns NULL and free's everything. 283 */ 284 static CLIENT * 285 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr) 286 { 287 CLIENT *client; 288 struct netbuf *addr, taddr; 289 struct netbuf addr_to_delete; 290 struct __rpc_sockinfo si; 291 struct addrinfo hints, *res, *tres; 292 struct address_cache *ad_cache; 293 char *tmpaddr; 294 295 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */ 296 297 /* Get the address of the rpcbind. Check cache first */ 298 client = NULL; 299 addr_to_delete.len = 0; 300 rwlock_rdlock(&rpcbaddr_cache_lock); 301 ad_cache = NULL; 302 if (host != NULL) 303 ad_cache = check_cache(host, nconf->nc_netid); 304 if (ad_cache != NULL) { 305 addr = ad_cache->ac_taddr; 306 client = clnt_tli_create(RPC_ANYFD, nconf, addr, 307 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 308 if (client != NULL) { 309 if (targaddr) 310 *targaddr = strdup(ad_cache->ac_uaddr); 311 rwlock_unlock(&rpcbaddr_cache_lock); 312 return (client); 313 } 314 addr_to_delete.len = addr->len; 315 addr_to_delete.buf = (char *)malloc(addr->len); 316 if (addr_to_delete.buf == NULL) { 317 addr_to_delete.len = 0; 318 } else { 319 memcpy(addr_to_delete.buf, addr->buf, addr->len); 320 } 321 } 322 rwlock_unlock(&rpcbaddr_cache_lock); 323 if (addr_to_delete.len != 0) { 324 /* 325 * Assume this may be due to cache data being 326 * outdated 327 */ 328 rwlock_wrlock(&rpcbaddr_cache_lock); 329 delete_cache(&addr_to_delete); 330 rwlock_unlock(&rpcbaddr_cache_lock); 331 free(addr_to_delete.buf); 332 } 333 if (!__rpc_nconf2sockinfo(nconf, &si)) { 334 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 335 return NULL; 336 } 337 338 memset(&hints, 0, sizeof hints); 339 hints.ai_family = si.si_af; 340 hints.ai_socktype = si.si_socktype; 341 hints.ai_protocol = si.si_proto; 342 343 #ifdef CLNT_DEBUG 344 printf("trying netid %s family %d proto %d socktype %d\n", 345 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype); 346 #endif 347 348 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 349 client = local_rpcb(); 350 if (! client) { 351 #ifdef ND_DEBUG 352 clnt_pcreateerror("rpcbind clnt interface"); 353 #endif 354 return (NULL); 355 } else { 356 struct sockaddr_un sun; 357 if (targaddr) { 358 *targaddr = malloc(sizeof(sun.sun_path)); 359 if (*targaddr == NULL) { 360 CLNT_DESTROY(client); 361 return (NULL); 362 } 363 strncpy(*targaddr, _PATH_RPCBINDSOCK, 364 sizeof(sun.sun_path)); 365 } 366 return (client); 367 } 368 } else { 369 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) { 370 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 371 return NULL; 372 } 373 } 374 375 for (tres = res; tres != NULL; tres = tres->ai_next) { 376 taddr.buf = tres->ai_addr; 377 taddr.len = taddr.maxlen = tres->ai_addrlen; 378 379 #ifdef ND_DEBUG 380 { 381 char *ua; 382 383 ua = taddr2uaddr(nconf, &taddr); 384 fprintf(stderr, "Got it [%s]\n", ua); 385 free(ua); 386 } 387 #endif 388 389 #ifdef ND_DEBUG 390 { 391 int i; 392 393 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n", 394 taddr.len, taddr.maxlen); 395 fprintf(stderr, "\tAddress is "); 396 for (i = 0; i < taddr.len; i++) 397 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]); 398 fprintf(stderr, "\n"); 399 } 400 #endif 401 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr, 402 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 403 #ifdef ND_DEBUG 404 if (! client) { 405 clnt_pcreateerror("rpcbind clnt interface"); 406 } 407 #endif 408 409 if (client) { 410 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL; 411 add_cache(host, nconf->nc_netid, &taddr, tmpaddr); 412 if (targaddr) 413 *targaddr = tmpaddr; 414 break; 415 } 416 } 417 if (res) 418 freeaddrinfo(res); 419 return (client); 420 } 421 422 /* XXX */ 423 #define IN4_LOCALHOST_STRING "127.0.0.1" 424 #define IN6_LOCALHOST_STRING "::1" 425 426 /* 427 * This routine will return a client handle that is connected to the local 428 * rpcbind. Returns NULL on error and free's everything. 429 */ 430 static CLIENT * 431 local_rpcb() 432 { 433 CLIENT *client; 434 static struct netconfig *loopnconf; 435 static char *hostname; 436 int sock; 437 size_t tsize; 438 struct netbuf nbuf; 439 struct sockaddr_un sun; 440 441 /* 442 * Try connecting to the local rpcbind through a local socket 443 * first. If this doesn't work, try all transports defined in 444 * the netconfig file. 445 */ 446 memset(&sun, 0, sizeof sun); 447 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 448 if (sock < 0) 449 goto try_nconf; 450 sun.sun_family = AF_LOCAL; 451 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 452 nbuf.len = sun.sun_len = SUN_LEN(&sun); 453 nbuf.maxlen = sizeof (struct sockaddr_un); 454 nbuf.buf = &sun; 455 456 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0); 457 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG, 458 (rpcvers_t)RPCBVERS, tsize, tsize); 459 460 if (client != NULL) { 461 /* Mark the socket to be closed in destructor */ 462 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL); 463 return client; 464 } 465 466 /* Nobody needs this socket anymore; free the descriptor. */ 467 _close(sock); 468 469 try_nconf: 470 471 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */ 472 mutex_lock(&loopnconf_lock); 473 if (loopnconf == NULL) { 474 struct netconfig *nconf, *tmpnconf = NULL; 475 void *nc_handle; 476 int fd; 477 478 nc_handle = setnetconfig(); 479 if (nc_handle == NULL) { 480 /* fails to open netconfig file */ 481 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 482 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 483 mutex_unlock(&loopnconf_lock); 484 return (NULL); 485 } 486 while ((nconf = getnetconfig(nc_handle)) != NULL) { 487 #ifdef INET6 488 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 || 489 #else 490 if (( 491 #endif 492 strcmp(nconf->nc_protofmly, NC_INET) == 0) && 493 (nconf->nc_semantics == NC_TPI_COTS || 494 nconf->nc_semantics == NC_TPI_COTS_ORD)) { 495 fd = __rpc_nconf2fd(nconf); 496 /* 497 * Can't create a socket, assume that 498 * this family isn't configured in the kernel. 499 */ 500 if (fd < 0) 501 continue; 502 _close(fd); 503 tmpnconf = nconf; 504 if (!strcmp(nconf->nc_protofmly, NC_INET)) 505 hostname = IN4_LOCALHOST_STRING; 506 else 507 hostname = IN6_LOCALHOST_STRING; 508 } 509 } 510 if (tmpnconf == NULL) { 511 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 512 mutex_unlock(&loopnconf_lock); 513 return (NULL); 514 } 515 loopnconf = getnetconfigent(tmpnconf->nc_netid); 516 /* loopnconf is never freed */ 517 endnetconfig(nc_handle); 518 } 519 mutex_unlock(&loopnconf_lock); 520 client = getclnthandle(hostname, loopnconf, NULL); 521 return (client); 522 } 523 524 /* 525 * Set a mapping between program, version and address. 526 * Calls the rpcbind service to do the mapping. 527 * 528 * nconf - Network structure of transport 529 * address - Services netconfig address 530 */ 531 bool_t 532 rpcb_set(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf, 533 const struct netbuf *address) 534 { 535 CLIENT *client; 536 bool_t rslt = FALSE; 537 RPCB parms; 538 char uidbuf[32]; 539 540 /* parameter checking */ 541 if (nconf == NULL) { 542 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 543 return (FALSE); 544 } 545 if (address == NULL) { 546 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 547 return (FALSE); 548 } 549 client = local_rpcb(); 550 if (! client) { 551 return (FALSE); 552 } 553 554 /* convert to universal */ 555 /*LINTED const castaway*/ 556 parms.r_addr = taddr2uaddr((struct netconfig *) nconf, 557 (struct netbuf *)address); 558 if (!parms.r_addr) { 559 CLNT_DESTROY(client); 560 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 561 return (FALSE); /* no universal address */ 562 } 563 parms.r_prog = program; 564 parms.r_vers = version; 565 parms.r_netid = nconf->nc_netid; 566 /* 567 * Though uid is not being used directly, we still send it for 568 * completeness. For non-unix platforms, perhaps some other 569 * string or an empty string can be sent. 570 */ 571 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 572 parms.r_owner = uidbuf; 573 574 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb, 575 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 576 (char *)(void *)&rslt, tottimeout); 577 578 CLNT_DESTROY(client); 579 free(parms.r_addr); 580 return (rslt); 581 } 582 583 /* 584 * Remove the mapping between program, version and netbuf address. 585 * Calls the rpcbind service to do the un-mapping. 586 * If netbuf is NULL, unset for all the transports, otherwise unset 587 * only for the given transport. 588 */ 589 bool_t 590 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf) 591 { 592 CLIENT *client; 593 bool_t rslt = FALSE; 594 RPCB parms; 595 char uidbuf[32]; 596 597 client = local_rpcb(); 598 if (! client) { 599 return (FALSE); 600 } 601 602 parms.r_prog = program; 603 parms.r_vers = version; 604 if (nconf) 605 parms.r_netid = nconf->nc_netid; 606 else { 607 /*LINTED const castaway*/ 608 parms.r_netid = (char *) &nullstring[0]; /* unsets all */ 609 } 610 /*LINTED const castaway*/ 611 parms.r_addr = (char *) &nullstring[0]; 612 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 613 parms.r_owner = uidbuf; 614 615 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb, 616 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 617 (char *)(void *)&rslt, tottimeout); 618 619 CLNT_DESTROY(client); 620 return (rslt); 621 } 622 623 /* 624 * From the merged list, find the appropriate entry 625 */ 626 static struct netbuf * 627 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf) 628 { 629 struct netbuf *na = NULL; 630 rpcb_entry_list_ptr sp; 631 rpcb_entry *rmap; 632 633 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) { 634 rmap = &sp->rpcb_entry_map; 635 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) && 636 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) && 637 (nconf->nc_semantics == rmap->r_nc_semantics) && 638 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) { 639 na = uaddr2taddr(nconf, rmap->r_maddr); 640 #ifdef ND_DEBUG 641 fprintf(stderr, "\tRemote address is [%s].\n", 642 rmap->r_maddr); 643 if (!na) 644 fprintf(stderr, 645 "\tCouldn't resolve remote address!\n"); 646 #endif 647 break; 648 } 649 } 650 return (na); 651 } 652 653 /* 654 * Quick check to see if rpcbind is up. Tries to connect over 655 * local transport. 656 */ 657 static bool_t 658 __rpcbind_is_up(void) 659 { 660 struct netconfig *nconf; 661 struct sockaddr_un sun; 662 void *localhandle; 663 int sock; 664 665 nconf = NULL; 666 localhandle = setnetconfig(); 667 while ((nconf = getnetconfig(localhandle)) != NULL) { 668 if (nconf->nc_protofmly != NULL && 669 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 670 break; 671 } 672 if (nconf == NULL) 673 return (FALSE); 674 675 endnetconfig(localhandle); 676 677 memset(&sun, 0, sizeof sun); 678 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 679 if (sock < 0) 680 return (FALSE); 681 sun.sun_family = AF_LOCAL; 682 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path)); 683 sun.sun_len = SUN_LEN(&sun); 684 685 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) { 686 _close(sock); 687 return (FALSE); 688 } 689 690 _close(sock); 691 return (TRUE); 692 } 693 694 /* 695 * An internal function which optimizes rpcb_getaddr function. It also 696 * returns the client handle that it uses to contact the remote rpcbind. 697 * 698 * The algorithm used: If the transports is TCP or UDP, it first tries 699 * version 2 (portmap), 4 and then 3 (svr4). This order should be 700 * changed in the next OS release to 4, 2 and 3. We are assuming that by 701 * that time, version 4 would be available on many machines on the network. 702 * With this algorithm, we get performance as well as a plan for 703 * obsoleting version 2. 704 * 705 * For all other transports, the algorithm remains as 4 and then 3. 706 * 707 * XXX: Due to some problems with t_connect(), we do not reuse the same client 708 * handle for COTS cases and hence in these cases we do not return the 709 * client handle. This code will change if t_connect() ever 710 * starts working properly. Also look under clnt_vc.c. 711 */ 712 struct netbuf * 713 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version, 714 const struct netconfig *nconf, const char *host, 715 CLIENT **clpp, struct timeval *tp) 716 { 717 static bool_t check_rpcbind = TRUE; 718 CLIENT *client = NULL; 719 RPCB parms; 720 enum clnt_stat clnt_st; 721 char *ua = NULL; 722 rpcvers_t vers; 723 struct netbuf *address = NULL; 724 rpcvers_t start_vers = RPCBVERS4; 725 struct netbuf servaddr; 726 727 /* parameter checking */ 728 if (nconf == NULL) { 729 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 730 return (NULL); 731 } 732 733 parms.r_addr = NULL; 734 735 /* 736 * Use default total timeout if no timeout is specified. 737 */ 738 if (tp == NULL) 739 tp = &tottimeout; 740 741 #ifdef PORTMAP 742 /* Try version 2 for TCP or UDP */ 743 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 744 u_short port = 0; 745 struct netbuf remote; 746 rpcvers_t pmapvers = 2; 747 struct pmap pmapparms; 748 749 /* 750 * Try UDP only - there are some portmappers out 751 * there that use UDP only. 752 */ 753 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 754 struct netconfig *newnconf; 755 756 if ((newnconf = getnetconfigent("udp")) == NULL) { 757 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 758 return (NULL); 759 } 760 client = getclnthandle(host, newnconf, &parms.r_addr); 761 freenetconfigent(newnconf); 762 } else { 763 client = getclnthandle(host, nconf, &parms.r_addr); 764 } 765 if (client == NULL) 766 return (NULL); 767 768 /* 769 * Set version and retry timeout. 770 */ 771 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 772 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers); 773 774 pmapparms.pm_prog = program; 775 pmapparms.pm_vers = version; 776 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 777 IPPROTO_UDP : IPPROTO_TCP; 778 pmapparms.pm_port = 0; /* not needed */ 779 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 780 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 781 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 782 *tp); 783 if (clnt_st != RPC_SUCCESS) { 784 if ((clnt_st == RPC_PROGVERSMISMATCH) || 785 (clnt_st == RPC_PROGUNAVAIL)) 786 goto try_rpcbind; /* Try different versions */ 787 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 788 clnt_geterr(client, &rpc_createerr.cf_error); 789 goto error; 790 } else if (port == 0) { 791 address = NULL; 792 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 793 goto error; 794 } 795 port = htons(port); 796 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote); 797 if (((address = (struct netbuf *) 798 malloc(sizeof (struct netbuf))) == NULL) || 799 ((address->buf = (char *) 800 malloc(remote.len)) == NULL)) { 801 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 802 clnt_geterr(client, &rpc_createerr.cf_error); 803 if (address) { 804 free(address); 805 address = NULL; 806 } 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 int 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 enum clnt_stat 1106 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp, 1107 xdrres, resp, tout, addr_ptr) 1108 const struct netconfig *nconf; /* Netconfig structure */ 1109 const char *host; /* Remote host name */ 1110 rpcprog_t prog; 1111 rpcvers_t vers; 1112 rpcproc_t proc; /* Remote proc identifiers */ 1113 xdrproc_t xdrargs, xdrres; /* XDR routines */ 1114 caddr_t argsp, resp; /* Argument and Result */ 1115 struct timeval tout; /* Timeout value for this call */ 1116 const struct netbuf *addr_ptr; /* Preallocated netbuf address */ 1117 { 1118 CLIENT *client; 1119 enum clnt_stat stat; 1120 struct r_rpcb_rmtcallargs a; 1121 struct r_rpcb_rmtcallres r; 1122 rpcvers_t rpcb_vers; 1123 1124 stat = 0; 1125 client = getclnthandle(host, nconf, NULL); 1126 if (client == NULL) { 1127 return (RPC_FAILED); 1128 } 1129 /*LINTED const castaway*/ 1130 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout); 1131 a.prog = prog; 1132 a.vers = vers; 1133 a.proc = proc; 1134 a.args.args_val = argsp; 1135 a.xdr_args = xdrargs; 1136 r.addr = NULL; 1137 r.results.results_val = resp; 1138 r.xdr_res = xdrres; 1139 1140 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1141 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1142 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1143 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1144 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1145 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1146 struct netbuf *na; 1147 /*LINTED const castaway*/ 1148 na = uaddr2taddr((struct netconfig *) nconf, r.addr); 1149 if (!na) { 1150 stat = RPC_N2AXLATEFAILURE; 1151 /*LINTED const castaway*/ 1152 ((struct netbuf *) addr_ptr)->len = 0; 1153 goto error; 1154 } 1155 if (na->len > addr_ptr->maxlen) { 1156 /* Too long address */ 1157 stat = RPC_FAILED; /* XXX A better error no */ 1158 free(na->buf); 1159 free(na); 1160 /*LINTED const castaway*/ 1161 ((struct netbuf *) addr_ptr)->len = 0; 1162 goto error; 1163 } 1164 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1165 /*LINTED const castaway*/ 1166 ((struct netbuf *)addr_ptr)->len = na->len; 1167 free(na->buf); 1168 free(na); 1169 break; 1170 } else if ((stat != RPC_PROGVERSMISMATCH) && 1171 (stat != RPC_PROGUNAVAIL)) { 1172 goto error; 1173 } 1174 } 1175 error: 1176 CLNT_DESTROY(client); 1177 if (r.addr) 1178 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1179 return (stat); 1180 } 1181 1182 /* 1183 * Gets the time on the remote host. 1184 * Returns 1 if succeeds else 0. 1185 */ 1186 bool_t 1187 rpcb_gettime(const char *host, time_t *timep) 1188 { 1189 CLIENT *client = NULL; 1190 void *handle; 1191 struct netconfig *nconf; 1192 rpcvers_t vers; 1193 enum clnt_stat st; 1194 1195 1196 if ((host == NULL) || (host[0] == 0)) { 1197 time(timep); 1198 return (TRUE); 1199 } 1200 1201 if ((handle = __rpc_setconf("netpath")) == NULL) { 1202 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1203 return (FALSE); 1204 } 1205 rpc_createerr.cf_stat = RPC_SUCCESS; 1206 while (client == NULL) { 1207 if ((nconf = __rpc_getconf(handle)) == NULL) { 1208 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1209 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1210 break; 1211 } 1212 client = getclnthandle(host, nconf, NULL); 1213 if (client) 1214 break; 1215 } 1216 __rpc_endconf(handle); 1217 if (client == (CLIENT *) NULL) { 1218 return (FALSE); 1219 } 1220 1221 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1222 (xdrproc_t) xdr_void, NULL, 1223 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1224 1225 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1226 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1227 if (vers == RPCBVERS4) { 1228 /* fall back to earlier version */ 1229 vers = RPCBVERS; 1230 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1231 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1232 (xdrproc_t) xdr_void, NULL, 1233 (xdrproc_t) xdr_int, (char *)(void *)timep, 1234 tottimeout); 1235 } 1236 } 1237 CLNT_DESTROY(client); 1238 return (st == RPC_SUCCESS? TRUE: FALSE); 1239 } 1240 1241 /* 1242 * Converts taddr to universal address. This routine should never 1243 * really be called because local n2a libraries are always provided. 1244 */ 1245 char * 1246 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr) 1247 { 1248 CLIENT *client; 1249 char *uaddr = NULL; 1250 1251 1252 /* parameter checking */ 1253 if (nconf == NULL) { 1254 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1255 return (NULL); 1256 } 1257 if (taddr == NULL) { 1258 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1259 return (NULL); 1260 } 1261 client = local_rpcb(); 1262 if (! client) { 1263 return (NULL); 1264 } 1265 1266 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1267 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1268 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout); 1269 CLNT_DESTROY(client); 1270 return (uaddr); 1271 } 1272 1273 /* 1274 * Converts universal address to netbuf. This routine should never 1275 * really be called because local n2a libraries are always provided. 1276 */ 1277 struct netbuf * 1278 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr) 1279 { 1280 CLIENT *client; 1281 struct netbuf *taddr; 1282 1283 1284 /* parameter checking */ 1285 if (nconf == NULL) { 1286 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1287 return (NULL); 1288 } 1289 if (uaddr == NULL) { 1290 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1291 return (NULL); 1292 } 1293 client = local_rpcb(); 1294 if (! client) { 1295 return (NULL); 1296 } 1297 1298 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1299 if (taddr == NULL) { 1300 CLNT_DESTROY(client); 1301 return (NULL); 1302 } 1303 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1304 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1305 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1306 tottimeout) != RPC_SUCCESS) { 1307 free(taddr); 1308 taddr = NULL; 1309 } 1310 CLNT_DESTROY(client); 1311 return (taddr); 1312 } 1313