1 /* $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $ */ 2 3 /* 4 * The contents of this file are subject to the Sun Standards 5 * License Version 1.0 the (the "License";) You may not use 6 * this file except in compliance with the License. You may 7 * obtain a copy of the License at lib/libc/rpc/LICENSE 8 * 9 * Software distributed under the License is distributed on 10 * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either 11 * express or implied. See the License for the specific 12 * language governing rights and limitations under the License. 13 * 14 * The Original Code is Copyright 1998 by Sun Microsystems, Inc 15 * 16 * The Initial Developer of the Original Code is: Sun 17 * Microsystems, Inc. 18 * 19 * All Rights Reserved. 20 * 21 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 22 * unrestricted use provided that this legend is included on all tape 23 * media and as a part of the software program in whole or part. Users 24 * may copy or modify Sun RPC without charge, but are not authorized 25 * to license or distribute it to anyone else except as part of a product or 26 * program developed by the user. 27 * 28 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 29 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 31 * 32 * Sun RPC is provided with no support and without any obligation on the 33 * part of Sun Microsystems, Inc. to assist in its use, correction, 34 * modification or enhancement. 35 * 36 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 37 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 38 * OR ANY PART THEREOF. 39 * 40 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 41 * or profits or other special, indirect and consequential damages, even if 42 * Sun has been advised of the possibility of such damages. 43 * 44 * Sun Microsystems, Inc. 45 * 2550 Garcia Avenue 46 * Mountain View, California 94043 47 */ 48 /* 49 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 50 */ 51 52 /* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */ 53 54 55 #if defined(LIBC_SCCS) && !defined(lint) 56 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro"; 57 #endif 58 #include <sys/cdefs.h> 59 __FBSDID("$FreeBSD$"); 60 61 /* 62 * rpcb_clnt.c 63 * interface to rpcbind rpc service. 64 * 65 * Copyright (C) 1988, Sun Microsystems, Inc. 66 */ 67 68 #include "namespace.h" 69 #include "reentrant.h" 70 #include <sys/types.h> 71 #include <sys/socket.h> 72 #include <sys/un.h> 73 #include <sys/utsname.h> 74 #include <rpc/rpc.h> 75 #include <rpc/rpcb_prot.h> 76 #include <rpc/nettype.h> 77 #include <netconfig.h> 78 #ifdef PORTMAP 79 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */ 80 #include <rpc/pmap_prot.h> 81 #endif /* PORTMAP */ 82 #include <stdio.h> 83 #include <errno.h> 84 #include <stdlib.h> 85 #include <string.h> 86 #include <unistd.h> 87 #include <netdb.h> 88 #include <syslog.h> 89 #include "un-namespace.h" 90 91 #include "rpc_com.h" 92 #include "mt_misc.h" 93 94 static struct timeval tottimeout = { 60, 0 }; 95 static const struct timeval rmttimeout = { 3, 0 }; 96 static struct timeval rpcbrmttime = { 15, 0 }; 97 98 extern bool_t xdr_wrapstring(XDR *, char **); 99 100 static const char nullstring[] = "\000"; 101 102 #define CACHESIZE 6 103 104 struct address_cache { 105 char *ac_host; 106 char *ac_netid; 107 char *ac_uaddr; 108 struct netbuf *ac_taddr; 109 struct address_cache *ac_next; 110 }; 111 112 static struct address_cache *front; 113 static int cachesize; 114 115 #define CLCR_GET_RPCB_TIMEOUT 1 116 #define CLCR_SET_RPCB_TIMEOUT 2 117 118 119 extern int __rpc_lowvers; 120 121 static struct address_cache *check_cache(const char *, const char *); 122 static void delete_cache(struct netbuf *); 123 static void add_cache(const char *, const char *, struct netbuf *, char *); 124 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **); 125 static CLIENT *local_rpcb(void); 126 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *); 127 128 /* 129 * This routine adjusts the timeout used for calls to the remote rpcbind. 130 * Also, this routine can be used to set the use of portmapper version 2 131 * only when doing rpc_broadcasts 132 * These are private routines that may not be provided in future releases. 133 */ 134 bool_t 135 __rpc_control(request, info) 136 int request; 137 void *info; 138 { 139 switch (request) { 140 case CLCR_GET_RPCB_TIMEOUT: 141 *(struct timeval *)info = tottimeout; 142 break; 143 case CLCR_SET_RPCB_TIMEOUT: 144 tottimeout = *(struct timeval *)info; 145 break; 146 case CLCR_SET_LOWVERS: 147 __rpc_lowvers = *(int *)info; 148 break; 149 case CLCR_GET_LOWVERS: 150 *(int *)info = __rpc_lowvers; 151 break; 152 default: 153 return (FALSE); 154 } 155 return (TRUE); 156 } 157 158 /* 159 * It might seem that a reader/writer lock would be more reasonable here. 160 * However because getclnthandle(), the only user of the cache functions, 161 * may do a delete_cache() operation if a check_cache() fails to return an 162 * address useful to clnt_tli_create(), we may as well use a mutex. 163 */ 164 /* 165 * As it turns out, if the cache lock is *not* a reader/writer lock, we will 166 * block all clnt_create's if we are trying to connect to a host that's down, 167 * since the lock will be held all during that time. 168 */ 169 170 /* 171 * The routines check_cache(), add_cache(), delete_cache() manage the 172 * cache of rpcbind addresses for (host, netid). 173 */ 174 175 static struct address_cache * 176 check_cache(host, netid) 177 const char *host, *netid; 178 { 179 struct address_cache *cptr; 180 181 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 182 183 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 184 if (!strcmp(cptr->ac_host, host) && 185 !strcmp(cptr->ac_netid, netid)) { 186 #ifdef ND_DEBUG 187 fprintf(stderr, "Found cache entry for %s: %s\n", 188 host, netid); 189 #endif 190 return (cptr); 191 } 192 } 193 return ((struct address_cache *) NULL); 194 } 195 196 static void 197 delete_cache(addr) 198 struct netbuf *addr; 199 { 200 struct address_cache *cptr, *prevptr = NULL; 201 202 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */ 203 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) { 204 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) { 205 free(cptr->ac_host); 206 free(cptr->ac_netid); 207 free(cptr->ac_taddr->buf); 208 free(cptr->ac_taddr); 209 if (cptr->ac_uaddr) 210 free(cptr->ac_uaddr); 211 if (prevptr) 212 prevptr->ac_next = cptr->ac_next; 213 else 214 front = cptr->ac_next; 215 free(cptr); 216 cachesize--; 217 break; 218 } 219 prevptr = cptr; 220 } 221 } 222 223 static void 224 add_cache(host, netid, taddr, uaddr) 225 const char *host, *netid; 226 char *uaddr; 227 struct netbuf *taddr; 228 { 229 struct address_cache *ad_cache, *cptr, *prevptr; 230 231 ad_cache = (struct address_cache *) 232 malloc(sizeof (struct address_cache)); 233 if (!ad_cache) { 234 return; 235 } 236 ad_cache->ac_host = strdup(host); 237 ad_cache->ac_netid = strdup(netid); 238 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL; 239 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf)); 240 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr || 241 (uaddr && !ad_cache->ac_uaddr)) { 242 return; 243 } 244 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len; 245 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len); 246 if (ad_cache->ac_taddr->buf == NULL) { 247 return; 248 } 249 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len); 250 #ifdef ND_DEBUG 251 fprintf(stderr, "Added to cache: %s : %s\n", host, netid); 252 #endif 253 254 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */ 255 256 rwlock_wrlock(&rpcbaddr_cache_lock); 257 if (cachesize < CACHESIZE) { 258 ad_cache->ac_next = front; 259 front = ad_cache; 260 cachesize++; 261 } else { 262 /* Free the last entry */ 263 cptr = front; 264 prevptr = NULL; 265 while (cptr->ac_next) { 266 prevptr = cptr; 267 cptr = cptr->ac_next; 268 } 269 270 #ifdef ND_DEBUG 271 fprintf(stderr, "Deleted from cache: %s : %s\n", 272 cptr->ac_host, cptr->ac_netid); 273 #endif 274 free(cptr->ac_host); 275 free(cptr->ac_netid); 276 free(cptr->ac_taddr->buf); 277 free(cptr->ac_taddr); 278 if (cptr->ac_uaddr) 279 free(cptr->ac_uaddr); 280 281 if (prevptr) { 282 prevptr->ac_next = NULL; 283 ad_cache->ac_next = front; 284 front = ad_cache; 285 } else { 286 front = ad_cache; 287 ad_cache->ac_next = NULL; 288 } 289 free(cptr); 290 } 291 rwlock_unlock(&rpcbaddr_cache_lock); 292 } 293 294 /* 295 * This routine will return a client handle that is connected to the 296 * rpcbind. If targaddr is non-NULL, the "universal address" of the 297 * host will be stored in *targaddr; the caller is responsible for 298 * freeing this string. 299 * On error, returns NULL and free's everything. 300 */ 301 static CLIENT * 302 getclnthandle(host, nconf, targaddr) 303 const char *host; 304 const struct netconfig *nconf; 305 char **targaddr; 306 { 307 CLIENT *client; 308 struct netbuf *addr, taddr; 309 struct netbuf addr_to_delete; 310 struct __rpc_sockinfo si; 311 struct addrinfo hints, *res, *tres; 312 struct address_cache *ad_cache; 313 char *tmpaddr; 314 315 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */ 316 317 /* Get the address of the rpcbind. Check cache first */ 318 client = NULL; 319 addr_to_delete.len = 0; 320 rwlock_rdlock(&rpcbaddr_cache_lock); 321 ad_cache = NULL; 322 if (host != NULL) 323 ad_cache = check_cache(host, nconf->nc_netid); 324 if (ad_cache != NULL) { 325 addr = ad_cache->ac_taddr; 326 client = clnt_tli_create(RPC_ANYFD, nconf, addr, 327 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 328 if (client != NULL) { 329 if (targaddr) 330 *targaddr = strdup(ad_cache->ac_uaddr); 331 rwlock_unlock(&rpcbaddr_cache_lock); 332 return (client); 333 } 334 addr_to_delete.len = addr->len; 335 addr_to_delete.buf = (char *)malloc(addr->len); 336 if (addr_to_delete.buf == NULL) { 337 addr_to_delete.len = 0; 338 } else { 339 memcpy(addr_to_delete.buf, addr->buf, addr->len); 340 } 341 } 342 rwlock_unlock(&rpcbaddr_cache_lock); 343 if (addr_to_delete.len != 0) { 344 /* 345 * Assume this may be due to cache data being 346 * outdated 347 */ 348 rwlock_wrlock(&rpcbaddr_cache_lock); 349 delete_cache(&addr_to_delete); 350 rwlock_unlock(&rpcbaddr_cache_lock); 351 free(addr_to_delete.buf); 352 } 353 if (!__rpc_nconf2sockinfo(nconf, &si)) { 354 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 355 return NULL; 356 } 357 358 memset(&hints, 0, sizeof hints); 359 hints.ai_family = si.si_af; 360 hints.ai_socktype = si.si_socktype; 361 hints.ai_protocol = si.si_proto; 362 363 #ifdef CLNT_DEBUG 364 printf("trying netid %s family %d proto %d socktype %d\n", 365 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype); 366 #endif 367 368 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 369 client = local_rpcb(); 370 if (! client) { 371 #ifdef ND_DEBUG 372 clnt_pcreateerror("rpcbind clnt interface"); 373 #endif 374 return (NULL); 375 } else { 376 struct sockaddr_un sun; 377 378 *targaddr = malloc(sizeof(sun.sun_path)); 379 strncpy(*targaddr, _PATH_RPCBINDSOCK, 380 sizeof(sun.sun_path)); 381 return (client); 382 } 383 } else { 384 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) { 385 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 386 return NULL; 387 } 388 } 389 390 for (tres = res; tres != NULL; tres = tres->ai_next) { 391 taddr.buf = tres->ai_addr; 392 taddr.len = taddr.maxlen = tres->ai_addrlen; 393 394 #ifdef ND_DEBUG 395 { 396 char *ua; 397 398 ua = taddr2uaddr(nconf, &taddr); 399 fprintf(stderr, "Got it [%s]\n", ua); 400 free(ua); 401 } 402 #endif 403 404 #ifdef ND_DEBUG 405 { 406 int i; 407 408 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n", 409 taddr.len, taddr.maxlen); 410 fprintf(stderr, "\tAddress is "); 411 for (i = 0; i < taddr.len; i++) 412 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]); 413 fprintf(stderr, "\n"); 414 } 415 #endif 416 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr, 417 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 418 #ifdef ND_DEBUG 419 if (! client) { 420 clnt_pcreateerror("rpcbind clnt interface"); 421 } 422 #endif 423 424 if (client) { 425 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL; 426 add_cache(host, nconf->nc_netid, &taddr, tmpaddr); 427 if (targaddr) 428 *targaddr = tmpaddr; 429 break; 430 } 431 } 432 if (res) 433 freeaddrinfo(res); 434 return (client); 435 } 436 437 /* XXX */ 438 #define IN4_LOCALHOST_STRING "127.0.0.1" 439 #define IN6_LOCALHOST_STRING "::1" 440 441 /* 442 * This routine will return a client handle that is connected to the local 443 * rpcbind. Returns NULL on error and free's everything. 444 */ 445 static CLIENT * 446 local_rpcb() 447 { 448 CLIENT *client; 449 static struct netconfig *loopnconf; 450 static char *hostname; 451 int sock; 452 size_t tsize; 453 struct netbuf nbuf; 454 struct sockaddr_un sun; 455 456 /* 457 * Try connecting to the local rpcbind through a local socket 458 * first. If this doesn't work, try all transports defined in 459 * the netconfig file. 460 */ 461 memset(&sun, 0, sizeof sun); 462 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 463 if (sock < 0) 464 goto try_nconf; 465 sun.sun_family = AF_LOCAL; 466 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 467 nbuf.len = sun.sun_len = SUN_LEN(&sun); 468 nbuf.maxlen = sizeof (struct sockaddr_un); 469 nbuf.buf = &sun; 470 471 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0); 472 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG, 473 (rpcvers_t)RPCBVERS, tsize, tsize); 474 475 if (client != NULL) { 476 /* Mark the socket to be closed in destructor */ 477 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL); 478 return client; 479 } 480 481 /* Nobody needs this socket anymore; free the descriptor. */ 482 _close(sock); 483 484 try_nconf: 485 486 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */ 487 mutex_lock(&loopnconf_lock); 488 if (loopnconf == NULL) { 489 struct netconfig *nconf, *tmpnconf = NULL; 490 void *nc_handle; 491 int fd; 492 493 nc_handle = setnetconfig(); 494 if (nc_handle == NULL) { 495 /* fails to open netconfig file */ 496 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 497 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 498 mutex_unlock(&loopnconf_lock); 499 return (NULL); 500 } 501 while ((nconf = getnetconfig(nc_handle)) != NULL) { 502 #ifdef INET6 503 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 || 504 #else 505 if (( 506 #endif 507 strcmp(nconf->nc_protofmly, NC_INET) == 0) && 508 (nconf->nc_semantics == NC_TPI_COTS || 509 nconf->nc_semantics == NC_TPI_COTS_ORD)) { 510 fd = __rpc_nconf2fd(nconf); 511 /* 512 * Can't create a socket, assume that 513 * this family isn't configured in the kernel. 514 */ 515 if (fd < 0) 516 continue; 517 _close(fd); 518 tmpnconf = nconf; 519 if (!strcmp(nconf->nc_protofmly, NC_INET)) 520 hostname = IN4_LOCALHOST_STRING; 521 else 522 hostname = IN6_LOCALHOST_STRING; 523 } 524 } 525 if (tmpnconf == NULL) { 526 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 527 mutex_unlock(&loopnconf_lock); 528 return (NULL); 529 } 530 loopnconf = getnetconfigent(tmpnconf->nc_netid); 531 /* loopnconf is never freed */ 532 endnetconfig(nc_handle); 533 } 534 mutex_unlock(&loopnconf_lock); 535 client = getclnthandle(hostname, loopnconf, NULL); 536 return (client); 537 } 538 539 /* 540 * Set a mapping between program, version and address. 541 * Calls the rpcbind service to do the mapping. 542 */ 543 bool_t 544 rpcb_set(program, version, nconf, address) 545 rpcprog_t program; 546 rpcvers_t version; 547 const struct netconfig *nconf; /* Network structure of transport */ 548 const struct netbuf *address; /* Services netconfig address */ 549 { 550 CLIENT *client; 551 bool_t rslt = FALSE; 552 RPCB parms; 553 char uidbuf[32]; 554 555 /* parameter checking */ 556 if (nconf == NULL) { 557 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 558 return (FALSE); 559 } 560 if (address == NULL) { 561 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 562 return (FALSE); 563 } 564 client = local_rpcb(); 565 if (! client) { 566 return (FALSE); 567 } 568 569 /* convert to universal */ 570 /*LINTED const castaway*/ 571 parms.r_addr = taddr2uaddr((struct netconfig *) nconf, 572 (struct netbuf *)address); 573 if (!parms.r_addr) { 574 CLNT_DESTROY(client); 575 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 576 return (FALSE); /* no universal address */ 577 } 578 parms.r_prog = program; 579 parms.r_vers = version; 580 parms.r_netid = nconf->nc_netid; 581 /* 582 * Though uid is not being used directly, we still send it for 583 * completeness. For non-unix platforms, perhaps some other 584 * string or an empty string can be sent. 585 */ 586 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 587 parms.r_owner = uidbuf; 588 589 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb, 590 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 591 (char *)(void *)&rslt, tottimeout); 592 593 CLNT_DESTROY(client); 594 free(parms.r_addr); 595 return (rslt); 596 } 597 598 /* 599 * Remove the mapping between program, version and netbuf address. 600 * Calls the rpcbind service to do the un-mapping. 601 * If netbuf is NULL, unset for all the transports, otherwise unset 602 * only for the given transport. 603 */ 604 bool_t 605 rpcb_unset(program, version, nconf) 606 rpcprog_t program; 607 rpcvers_t version; 608 const struct netconfig *nconf; 609 { 610 CLIENT *client; 611 bool_t rslt = FALSE; 612 RPCB parms; 613 char uidbuf[32]; 614 615 client = local_rpcb(); 616 if (! client) { 617 return (FALSE); 618 } 619 620 parms.r_prog = program; 621 parms.r_vers = version; 622 if (nconf) 623 parms.r_netid = nconf->nc_netid; 624 else { 625 /*LINTED const castaway*/ 626 parms.r_netid = (char *) &nullstring[0]; /* unsets all */ 627 } 628 /*LINTED const castaway*/ 629 parms.r_addr = (char *) &nullstring[0]; 630 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 631 parms.r_owner = uidbuf; 632 633 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb, 634 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 635 (char *)(void *)&rslt, tottimeout); 636 637 CLNT_DESTROY(client); 638 return (rslt); 639 } 640 641 /* 642 * From the merged list, find the appropriate entry 643 */ 644 static struct netbuf * 645 got_entry(relp, nconf) 646 rpcb_entry_list_ptr relp; 647 const struct netconfig *nconf; 648 { 649 struct netbuf *na = NULL; 650 rpcb_entry_list_ptr sp; 651 rpcb_entry *rmap; 652 653 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) { 654 rmap = &sp->rpcb_entry_map; 655 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) && 656 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) && 657 (nconf->nc_semantics == rmap->r_nc_semantics) && 658 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) { 659 na = uaddr2taddr(nconf, rmap->r_maddr); 660 #ifdef ND_DEBUG 661 fprintf(stderr, "\tRemote address is [%s].\n", 662 rmap->r_maddr); 663 if (!na) 664 fprintf(stderr, 665 "\tCouldn't resolve remote address!\n"); 666 #endif 667 break; 668 } 669 } 670 return (na); 671 } 672 673 /* 674 * Quick check to see if rpcbind is up. Tries to connect over 675 * local transport. 676 */ 677 static bool_t 678 __rpcbind_is_up() 679 { 680 struct netconfig *nconf; 681 struct sockaddr_un sun; 682 void *localhandle; 683 int sock; 684 685 nconf = NULL; 686 localhandle = setnetconfig(); 687 while ((nconf = getnetconfig(localhandle)) != NULL) { 688 if (nconf->nc_protofmly != NULL && 689 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 690 break; 691 } 692 if (nconf == NULL) 693 return (FALSE); 694 695 endnetconfig(localhandle); 696 697 memset(&sun, 0, sizeof sun); 698 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 699 if (sock < 0) 700 return (FALSE); 701 sun.sun_family = AF_LOCAL; 702 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path)); 703 sun.sun_len = SUN_LEN(&sun); 704 705 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) { 706 _close(sock); 707 return (FALSE); 708 } 709 710 _close(sock); 711 return (TRUE); 712 } 713 714 /* 715 * An internal function which optimizes rpcb_getaddr function. It also 716 * returns the client handle that it uses to contact the remote rpcbind. 717 * 718 * The algorithm used: If the transports is TCP or UDP, it first tries 719 * version 2 (portmap), 4 and then 3 (svr4). This order should be 720 * changed in the next OS release to 4, 2 and 3. We are assuming that by 721 * that time, version 4 would be available on many machines on the network. 722 * With this algorithm, we get performance as well as a plan for 723 * obsoleting version 2. 724 * 725 * For all other transports, the algorithm remains as 4 and then 3. 726 * 727 * XXX: Due to some problems with t_connect(), we do not reuse the same client 728 * handle for COTS cases and hence in these cases we do not return the 729 * client handle. This code will change if t_connect() ever 730 * starts working properly. Also look under clnt_vc.c. 731 */ 732 struct netbuf * 733 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp) 734 rpcprog_t program; 735 rpcvers_t version; 736 const struct netconfig *nconf; 737 const char *host; 738 CLIENT **clpp; 739 struct timeval *tp; 740 { 741 static bool_t check_rpcbind = TRUE; 742 CLIENT *client = NULL; 743 RPCB parms; 744 enum clnt_stat clnt_st; 745 char *ua = NULL; 746 rpcvers_t vers; 747 struct netbuf *address = NULL; 748 rpcvers_t start_vers = RPCBVERS4; 749 struct netbuf servaddr; 750 751 /* parameter checking */ 752 if (nconf == NULL) { 753 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 754 return (NULL); 755 } 756 757 parms.r_addr = NULL; 758 759 /* 760 * Use default total timeout if no timeout is specified. 761 */ 762 if (tp == NULL) 763 tp = &tottimeout; 764 765 #ifdef PORTMAP 766 /* Try version 2 for TCP or UDP */ 767 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 768 u_short port = 0; 769 struct netbuf remote; 770 rpcvers_t pmapvers = 2; 771 struct pmap pmapparms; 772 773 /* 774 * Try UDP only - there are some portmappers out 775 * there that use UDP only. 776 */ 777 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 778 struct netconfig *newnconf; 779 780 if ((newnconf = getnetconfigent("udp")) == NULL) { 781 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 782 return (NULL); 783 } 784 client = getclnthandle(host, newnconf, &parms.r_addr); 785 freenetconfigent(newnconf); 786 } else { 787 client = getclnthandle(host, nconf, &parms.r_addr); 788 } 789 if (client == NULL) 790 return (NULL); 791 792 /* 793 * Set version and retry timeout. 794 */ 795 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 796 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers); 797 798 pmapparms.pm_prog = program; 799 pmapparms.pm_vers = version; 800 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 801 IPPROTO_UDP : IPPROTO_TCP; 802 pmapparms.pm_port = 0; /* not needed */ 803 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 804 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 805 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 806 *tp); 807 if (clnt_st != RPC_SUCCESS) { 808 if ((clnt_st == RPC_PROGVERSMISMATCH) || 809 (clnt_st == RPC_PROGUNAVAIL)) 810 goto try_rpcbind; /* Try different versions */ 811 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 812 clnt_geterr(client, &rpc_createerr.cf_error); 813 goto error; 814 } else if (port == 0) { 815 address = NULL; 816 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 817 goto error; 818 } 819 port = htons(port); 820 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote); 821 if (((address = (struct netbuf *) 822 malloc(sizeof (struct netbuf))) == NULL) || 823 ((address->buf = (char *) 824 malloc(remote.len)) == NULL)) { 825 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 826 clnt_geterr(client, &rpc_createerr.cf_error); 827 if (address) { 828 free(address); 829 address = NULL; 830 } 831 goto error; 832 } 833 memcpy(address->buf, remote.buf, remote.len); 834 memcpy(&((char *)address->buf)[sizeof (short)], 835 (char *)(void *)&port, sizeof (short)); 836 address->len = address->maxlen = remote.len; 837 goto done; 838 } 839 #endif /* PORTMAP */ 840 841 try_rpcbind: 842 /* 843 * Check if rpcbind is up. This prevents needless delays when 844 * accessing applications such as the keyserver while booting 845 * disklessly. 846 */ 847 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 848 if (!__rpcbind_is_up()) { 849 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 850 rpc_createerr.cf_error.re_errno = 0; 851 goto error; 852 } 853 check_rpcbind = FALSE; 854 } 855 856 /* 857 * Now we try version 4 and then 3. 858 * We also send the remote system the address we used to 859 * contact it in case it can help to connect back with us 860 */ 861 parms.r_prog = program; 862 parms.r_vers = version; 863 /*LINTED const castaway*/ 864 parms.r_owner = (char *) &nullstring[0]; /* not needed; */ 865 /* just for xdring */ 866 parms.r_netid = nconf->nc_netid; /* not really needed */ 867 868 /* 869 * If a COTS transport is being used, try getting address via CLTS 870 * transport. This works only with version 4. 871 */ 872 if (nconf->nc_semantics == NC_TPI_COTS_ORD || 873 nconf->nc_semantics == NC_TPI_COTS) { 874 875 void *handle; 876 struct netconfig *nconf_clts; 877 rpcb_entry_list_ptr relp = NULL; 878 879 if (client == NULL) { 880 /* This did not go through the above PORTMAP/TCP code */ 881 if ((handle = __rpc_setconf("datagram_v")) != NULL) { 882 while ((nconf_clts = __rpc_getconf(handle)) 883 != NULL) { 884 if (strcmp(nconf_clts->nc_protofmly, 885 nconf->nc_protofmly) != 0) { 886 continue; 887 } 888 client = getclnthandle(host, nconf_clts, 889 &parms.r_addr); 890 break; 891 } 892 __rpc_endconf(handle); 893 } 894 if (client == NULL) 895 goto regular_rpcbind; /* Go the regular way */ 896 } else { 897 /* This is a UDP PORTMAP handle. Change to version 4 */ 898 vers = RPCBVERS4; 899 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 900 } 901 /* 902 * We also send the remote system the address we used to 903 * contact it in case it can help it connect back with us 904 */ 905 if (parms.r_addr == NULL) { 906 /*LINTED const castaway*/ 907 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */ 908 } 909 910 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 911 912 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST, 913 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 914 (xdrproc_t) xdr_rpcb_entry_list_ptr, 915 (char *)(void *)&relp, *tp); 916 if (clnt_st == RPC_SUCCESS) { 917 if ((address = got_entry(relp, nconf)) != NULL) { 918 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 919 (char *)(void *)&relp); 920 CLNT_CONTROL(client, CLGET_SVC_ADDR, 921 (char *)(void *)&servaddr); 922 __rpc_fixup_addr(address, &servaddr); 923 goto done; 924 } 925 /* Entry not found for this transport */ 926 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 927 (char *)(void *)&relp); 928 /* 929 * XXX: should have perhaps returned with error but 930 * since the remote machine might not always be able 931 * to send the address on all transports, we try the 932 * regular way with regular_rpcbind 933 */ 934 goto regular_rpcbind; 935 } else if ((clnt_st == RPC_PROGVERSMISMATCH) || 936 (clnt_st == RPC_PROGUNAVAIL)) { 937 start_vers = RPCBVERS; /* Try version 3 now */ 938 goto regular_rpcbind; /* Try different versions */ 939 } else { 940 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 941 clnt_geterr(client, &rpc_createerr.cf_error); 942 goto error; 943 } 944 } 945 946 regular_rpcbind: 947 948 /* Now the same transport is to be used to get the address */ 949 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) || 950 (nconf->nc_semantics == NC_TPI_COTS))) { 951 /* A CLTS type of client - destroy it */ 952 CLNT_DESTROY(client); 953 client = NULL; 954 } 955 956 if (client == NULL) { 957 client = getclnthandle(host, nconf, &parms.r_addr); 958 if (client == NULL) { 959 goto error; 960 } 961 } 962 if (parms.r_addr == NULL) { 963 /*LINTED const castaway*/ 964 parms.r_addr = (char *) &nullstring[0]; 965 } 966 967 /* First try from start_vers and then version 3 (RPCBVERS) */ 968 969 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime); 970 for (vers = start_vers; vers >= RPCBVERS; vers--) { 971 /* Set the version */ 972 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 973 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR, 974 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 975 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp); 976 if (clnt_st == RPC_SUCCESS) { 977 if ((ua == NULL) || (ua[0] == 0)) { 978 /* address unknown */ 979 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 980 goto error; 981 } 982 address = uaddr2taddr(nconf, ua); 983 #ifdef ND_DEBUG 984 fprintf(stderr, "\tRemote address is [%s]\n", ua); 985 if (!address) 986 fprintf(stderr, 987 "\tCouldn't resolve remote address!\n"); 988 #endif 989 xdr_free((xdrproc_t)xdr_wrapstring, 990 (char *)(void *)&ua); 991 992 if (! address) { 993 /* We don't know about your universal address */ 994 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 995 goto error; 996 } 997 CLNT_CONTROL(client, CLGET_SVC_ADDR, 998 (char *)(void *)&servaddr); 999 __rpc_fixup_addr(address, &servaddr); 1000 goto done; 1001 } else if (clnt_st == RPC_PROGVERSMISMATCH) { 1002 struct rpc_err rpcerr; 1003 1004 clnt_geterr(client, &rpcerr); 1005 if (rpcerr.re_vers.low > RPCBVERS4) 1006 goto error; /* a new version, can't handle */ 1007 } else if (clnt_st != RPC_PROGUNAVAIL) { 1008 /* Cant handle this error */ 1009 rpc_createerr.cf_stat = clnt_st; 1010 clnt_geterr(client, &rpc_createerr.cf_error); 1011 goto error; 1012 } 1013 } 1014 1015 if ((address == NULL) || (address->len == 0)) { 1016 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 1017 clnt_geterr(client, &rpc_createerr.cf_error); 1018 } 1019 1020 error: 1021 if (client) { 1022 CLNT_DESTROY(client); 1023 client = NULL; 1024 } 1025 done: 1026 if (nconf->nc_semantics != NC_TPI_CLTS) { 1027 /* This client is the connectionless one */ 1028 if (client) { 1029 CLNT_DESTROY(client); 1030 client = NULL; 1031 } 1032 } 1033 if (clpp) { 1034 *clpp = client; 1035 } else if (client) { 1036 CLNT_DESTROY(client); 1037 } 1038 if (parms.r_addr != NULL && parms.r_addr != nullstring) 1039 free(parms.r_addr); 1040 return (address); 1041 } 1042 1043 1044 /* 1045 * Find the mapped address for program, version. 1046 * Calls the rpcbind service remotely to do the lookup. 1047 * Uses the transport specified in nconf. 1048 * Returns FALSE (0) if no map exists, else returns 1. 1049 * 1050 * Assuming that the address is all properly allocated 1051 */ 1052 int 1053 rpcb_getaddr(program, version, nconf, address, host) 1054 rpcprog_t program; 1055 rpcvers_t version; 1056 const struct netconfig *nconf; 1057 struct netbuf *address; 1058 const char *host; 1059 { 1060 struct netbuf *na; 1061 1062 if ((na = __rpcb_findaddr_timed(program, version, 1063 (struct netconfig *) nconf, (char *) host, 1064 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL) 1065 return (FALSE); 1066 1067 if (na->len > address->maxlen) { 1068 /* Too long address */ 1069 free(na->buf); 1070 free(na); 1071 rpc_createerr.cf_stat = RPC_FAILED; 1072 return (FALSE); 1073 } 1074 memcpy(address->buf, na->buf, (size_t)na->len); 1075 address->len = na->len; 1076 free(na->buf); 1077 free(na); 1078 return (TRUE); 1079 } 1080 1081 /* 1082 * Get a copy of the current maps. 1083 * Calls the rpcbind service remotely to get the maps. 1084 * 1085 * It returns only a list of the services 1086 * It returns NULL on failure. 1087 */ 1088 rpcblist * 1089 rpcb_getmaps(nconf, host) 1090 const struct netconfig *nconf; 1091 const char *host; 1092 { 1093 rpcblist_ptr head = NULL; 1094 CLIENT *client; 1095 enum clnt_stat clnt_st; 1096 rpcvers_t vers = 0; 1097 1098 client = getclnthandle(host, nconf, NULL); 1099 if (client == NULL) { 1100 return (head); 1101 } 1102 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1103 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1104 (char *)(void *)&head, tottimeout); 1105 if (clnt_st == RPC_SUCCESS) 1106 goto done; 1107 1108 if ((clnt_st != RPC_PROGVERSMISMATCH) && 1109 (clnt_st != RPC_PROGUNAVAIL)) { 1110 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1111 clnt_geterr(client, &rpc_createerr.cf_error); 1112 goto done; 1113 } 1114 1115 /* fall back to earlier version */ 1116 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1117 if (vers == RPCBVERS4) { 1118 vers = RPCBVERS; 1119 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1120 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1121 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1122 (char *)(void *)&head, tottimeout) == RPC_SUCCESS) 1123 goto done; 1124 } 1125 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1126 clnt_geterr(client, &rpc_createerr.cf_error); 1127 1128 done: 1129 CLNT_DESTROY(client); 1130 return (head); 1131 } 1132 1133 /* 1134 * rpcbinder remote-call-service interface. 1135 * This routine is used to call the rpcbind remote call service 1136 * which will look up a service program in the address maps, and then 1137 * remotely call that routine with the given parameters. This allows 1138 * programs to do a lookup and call in one step. 1139 */ 1140 enum clnt_stat 1141 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp, 1142 xdrres, resp, tout, addr_ptr) 1143 const struct netconfig *nconf; /* Netconfig structure */ 1144 const char *host; /* Remote host name */ 1145 rpcprog_t prog; 1146 rpcvers_t vers; 1147 rpcproc_t proc; /* Remote proc identifiers */ 1148 xdrproc_t xdrargs, xdrres; /* XDR routines */ 1149 caddr_t argsp, resp; /* Argument and Result */ 1150 struct timeval tout; /* Timeout value for this call */ 1151 const struct netbuf *addr_ptr; /* Preallocated netbuf address */ 1152 { 1153 CLIENT *client; 1154 enum clnt_stat stat; 1155 struct r_rpcb_rmtcallargs a; 1156 struct r_rpcb_rmtcallres r; 1157 rpcvers_t rpcb_vers; 1158 1159 stat = 0; 1160 client = getclnthandle(host, nconf, NULL); 1161 if (client == NULL) { 1162 return (RPC_FAILED); 1163 } 1164 /*LINTED const castaway*/ 1165 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout); 1166 a.prog = prog; 1167 a.vers = vers; 1168 a.proc = proc; 1169 a.args.args_val = argsp; 1170 a.xdr_args = xdrargs; 1171 r.addr = NULL; 1172 r.results.results_val = resp; 1173 r.xdr_res = xdrres; 1174 1175 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1176 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1177 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1178 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1179 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1180 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1181 struct netbuf *na; 1182 /*LINTED const castaway*/ 1183 na = uaddr2taddr((struct netconfig *) nconf, r.addr); 1184 if (!na) { 1185 stat = RPC_N2AXLATEFAILURE; 1186 /*LINTED const castaway*/ 1187 ((struct netbuf *) addr_ptr)->len = 0; 1188 goto error; 1189 } 1190 if (na->len > addr_ptr->maxlen) { 1191 /* Too long address */ 1192 stat = RPC_FAILED; /* XXX A better error no */ 1193 free(na->buf); 1194 free(na); 1195 /*LINTED const castaway*/ 1196 ((struct netbuf *) addr_ptr)->len = 0; 1197 goto error; 1198 } 1199 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1200 /*LINTED const castaway*/ 1201 ((struct netbuf *)addr_ptr)->len = na->len; 1202 free(na->buf); 1203 free(na); 1204 break; 1205 } else if ((stat != RPC_PROGVERSMISMATCH) && 1206 (stat != RPC_PROGUNAVAIL)) { 1207 goto error; 1208 } 1209 } 1210 error: 1211 CLNT_DESTROY(client); 1212 if (r.addr) 1213 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1214 return (stat); 1215 } 1216 1217 /* 1218 * Gets the time on the remote host. 1219 * Returns 1 if succeeds else 0. 1220 */ 1221 bool_t 1222 rpcb_gettime(host, timep) 1223 const char *host; 1224 time_t *timep; 1225 { 1226 CLIENT *client = NULL; 1227 void *handle; 1228 struct netconfig *nconf; 1229 rpcvers_t vers; 1230 enum clnt_stat st; 1231 1232 1233 if ((host == NULL) || (host[0] == 0)) { 1234 time(timep); 1235 return (TRUE); 1236 } 1237 1238 if ((handle = __rpc_setconf("netpath")) == NULL) { 1239 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1240 return (FALSE); 1241 } 1242 rpc_createerr.cf_stat = RPC_SUCCESS; 1243 while (client == NULL) { 1244 if ((nconf = __rpc_getconf(handle)) == NULL) { 1245 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1246 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1247 break; 1248 } 1249 client = getclnthandle(host, nconf, NULL); 1250 if (client) 1251 break; 1252 } 1253 __rpc_endconf(handle); 1254 if (client == (CLIENT *) NULL) { 1255 return (FALSE); 1256 } 1257 1258 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1259 (xdrproc_t) xdr_void, NULL, 1260 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1261 1262 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1263 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1264 if (vers == RPCBVERS4) { 1265 /* fall back to earlier version */ 1266 vers = RPCBVERS; 1267 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1268 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1269 (xdrproc_t) xdr_void, NULL, 1270 (xdrproc_t) xdr_int, (char *)(void *)timep, 1271 tottimeout); 1272 } 1273 } 1274 CLNT_DESTROY(client); 1275 return (st == RPC_SUCCESS? TRUE: FALSE); 1276 } 1277 1278 /* 1279 * Converts taddr to universal address. This routine should never 1280 * really be called because local n2a libraries are always provided. 1281 */ 1282 char * 1283 rpcb_taddr2uaddr(nconf, taddr) 1284 struct netconfig *nconf; 1285 struct netbuf *taddr; 1286 { 1287 CLIENT *client; 1288 char *uaddr = NULL; 1289 1290 1291 /* parameter checking */ 1292 if (nconf == NULL) { 1293 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1294 return (NULL); 1295 } 1296 if (taddr == NULL) { 1297 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1298 return (NULL); 1299 } 1300 client = local_rpcb(); 1301 if (! client) { 1302 return (NULL); 1303 } 1304 1305 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1306 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1307 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout); 1308 CLNT_DESTROY(client); 1309 return (uaddr); 1310 } 1311 1312 /* 1313 * Converts universal address to netbuf. This routine should never 1314 * really be called because local n2a libraries are always provided. 1315 */ 1316 struct netbuf * 1317 rpcb_uaddr2taddr(nconf, uaddr) 1318 struct netconfig *nconf; 1319 char *uaddr; 1320 { 1321 CLIENT *client; 1322 struct netbuf *taddr; 1323 1324 1325 /* parameter checking */ 1326 if (nconf == NULL) { 1327 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1328 return (NULL); 1329 } 1330 if (uaddr == NULL) { 1331 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1332 return (NULL); 1333 } 1334 client = local_rpcb(); 1335 if (! client) { 1336 return (NULL); 1337 } 1338 1339 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1340 if (taddr == NULL) { 1341 CLNT_DESTROY(client); 1342 return (NULL); 1343 } 1344 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1345 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1346 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1347 tottimeout) != RPC_SUCCESS) { 1348 free(taddr); 1349 taddr = NULL; 1350 } 1351 CLNT_DESTROY(client); 1352 return (taddr); 1353 } 1354