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 goto out; 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 out: 248 if (ad_cache->ac_host) 249 free(ad_cache->ac_host); 250 if (ad_cache->ac_netid) 251 free(ad_cache->ac_netid); 252 if (ad_cache->ac_uaddr) 253 free(ad_cache->ac_uaddr); 254 if (ad_cache->ac_taddr) 255 free(ad_cache->ac_taddr); 256 free(ad_cache); 257 return; 258 } 259 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len); 260 #ifdef ND_DEBUG 261 fprintf(stderr, "Added to cache: %s : %s\n", host, netid); 262 #endif 263 264 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */ 265 266 rwlock_wrlock(&rpcbaddr_cache_lock); 267 if (cachesize < CACHESIZE) { 268 ad_cache->ac_next = front; 269 front = ad_cache; 270 cachesize++; 271 } else { 272 /* Free the last entry */ 273 cptr = front; 274 prevptr = NULL; 275 while (cptr->ac_next) { 276 prevptr = cptr; 277 cptr = cptr->ac_next; 278 } 279 280 #ifdef ND_DEBUG 281 fprintf(stderr, "Deleted from cache: %s : %s\n", 282 cptr->ac_host, cptr->ac_netid); 283 #endif 284 free(cptr->ac_host); 285 free(cptr->ac_netid); 286 free(cptr->ac_taddr->buf); 287 free(cptr->ac_taddr); 288 if (cptr->ac_uaddr) 289 free(cptr->ac_uaddr); 290 291 if (prevptr) { 292 prevptr->ac_next = NULL; 293 ad_cache->ac_next = front; 294 front = ad_cache; 295 } else { 296 front = ad_cache; 297 ad_cache->ac_next = NULL; 298 } 299 free(cptr); 300 } 301 rwlock_unlock(&rpcbaddr_cache_lock); 302 } 303 304 /* 305 * This routine will return a client handle that is connected to the 306 * rpcbind. If targaddr is non-NULL, the "universal address" of the 307 * host will be stored in *targaddr; the caller is responsible for 308 * freeing this string. 309 * On error, returns NULL and free's everything. 310 */ 311 static CLIENT * 312 getclnthandle(host, nconf, targaddr) 313 const char *host; 314 const struct netconfig *nconf; 315 char **targaddr; 316 { 317 CLIENT *client; 318 struct netbuf *addr, taddr; 319 struct netbuf addr_to_delete; 320 struct __rpc_sockinfo si; 321 struct addrinfo hints, *res, *tres; 322 struct address_cache *ad_cache; 323 char *tmpaddr; 324 325 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */ 326 327 /* Get the address of the rpcbind. Check cache first */ 328 client = NULL; 329 addr_to_delete.len = 0; 330 rwlock_rdlock(&rpcbaddr_cache_lock); 331 ad_cache = NULL; 332 if (host != NULL) 333 ad_cache = check_cache(host, nconf->nc_netid); 334 if (ad_cache != NULL) { 335 addr = ad_cache->ac_taddr; 336 client = clnt_tli_create(RPC_ANYFD, nconf, addr, 337 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 338 if (client != NULL) { 339 if (targaddr) 340 *targaddr = strdup(ad_cache->ac_uaddr); 341 rwlock_unlock(&rpcbaddr_cache_lock); 342 return (client); 343 } 344 addr_to_delete.len = addr->len; 345 addr_to_delete.buf = (char *)malloc(addr->len); 346 if (addr_to_delete.buf == NULL) { 347 addr_to_delete.len = 0; 348 } else { 349 memcpy(addr_to_delete.buf, addr->buf, addr->len); 350 } 351 } 352 rwlock_unlock(&rpcbaddr_cache_lock); 353 if (addr_to_delete.len != 0) { 354 /* 355 * Assume this may be due to cache data being 356 * outdated 357 */ 358 rwlock_wrlock(&rpcbaddr_cache_lock); 359 delete_cache(&addr_to_delete); 360 rwlock_unlock(&rpcbaddr_cache_lock); 361 free(addr_to_delete.buf); 362 } 363 if (!__rpc_nconf2sockinfo(nconf, &si)) { 364 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 365 return NULL; 366 } 367 368 memset(&hints, 0, sizeof hints); 369 hints.ai_family = si.si_af; 370 hints.ai_socktype = si.si_socktype; 371 hints.ai_protocol = si.si_proto; 372 373 #ifdef CLNT_DEBUG 374 printf("trying netid %s family %d proto %d socktype %d\n", 375 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype); 376 #endif 377 378 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 379 client = local_rpcb(); 380 if (! client) { 381 #ifdef ND_DEBUG 382 clnt_pcreateerror("rpcbind clnt interface"); 383 #endif 384 return (NULL); 385 } else { 386 struct sockaddr_un sun; 387 if (targaddr) { 388 *targaddr = malloc(sizeof(sun.sun_path)); 389 if (*targaddr == NULL) { 390 CLNT_DESTROY(client); 391 return (NULL); 392 } 393 strncpy(*targaddr, _PATH_RPCBINDSOCK, 394 sizeof(sun.sun_path)); 395 } 396 return (client); 397 } 398 } else { 399 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) { 400 rpc_createerr.cf_stat = RPC_UNKNOWNHOST; 401 return NULL; 402 } 403 } 404 405 for (tres = res; tres != NULL; tres = tres->ai_next) { 406 taddr.buf = tres->ai_addr; 407 taddr.len = taddr.maxlen = tres->ai_addrlen; 408 409 #ifdef ND_DEBUG 410 { 411 char *ua; 412 413 ua = taddr2uaddr(nconf, &taddr); 414 fprintf(stderr, "Got it [%s]\n", ua); 415 free(ua); 416 } 417 #endif 418 419 #ifdef ND_DEBUG 420 { 421 int i; 422 423 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n", 424 taddr.len, taddr.maxlen); 425 fprintf(stderr, "\tAddress is "); 426 for (i = 0; i < taddr.len; i++) 427 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]); 428 fprintf(stderr, "\n"); 429 } 430 #endif 431 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr, 432 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0); 433 #ifdef ND_DEBUG 434 if (! client) { 435 clnt_pcreateerror("rpcbind clnt interface"); 436 } 437 #endif 438 439 if (client) { 440 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL; 441 add_cache(host, nconf->nc_netid, &taddr, tmpaddr); 442 if (targaddr) 443 *targaddr = tmpaddr; 444 break; 445 } 446 } 447 if (res) 448 freeaddrinfo(res); 449 return (client); 450 } 451 452 /* XXX */ 453 #define IN4_LOCALHOST_STRING "127.0.0.1" 454 #define IN6_LOCALHOST_STRING "::1" 455 456 /* 457 * This routine will return a client handle that is connected to the local 458 * rpcbind. Returns NULL on error and free's everything. 459 */ 460 static CLIENT * 461 local_rpcb() 462 { 463 CLIENT *client; 464 static struct netconfig *loopnconf; 465 static char *hostname; 466 int sock; 467 size_t tsize; 468 struct netbuf nbuf; 469 struct sockaddr_un sun; 470 471 /* 472 * Try connecting to the local rpcbind through a local socket 473 * first. If this doesn't work, try all transports defined in 474 * the netconfig file. 475 */ 476 memset(&sun, 0, sizeof sun); 477 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 478 if (sock < 0) 479 goto try_nconf; 480 sun.sun_family = AF_LOCAL; 481 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 482 nbuf.len = sun.sun_len = SUN_LEN(&sun); 483 nbuf.maxlen = sizeof (struct sockaddr_un); 484 nbuf.buf = &sun; 485 486 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0); 487 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG, 488 (rpcvers_t)RPCBVERS, tsize, tsize); 489 490 if (client != NULL) { 491 /* Mark the socket to be closed in destructor */ 492 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL); 493 return client; 494 } 495 496 /* Nobody needs this socket anymore; free the descriptor. */ 497 _close(sock); 498 499 try_nconf: 500 501 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */ 502 mutex_lock(&loopnconf_lock); 503 if (loopnconf == NULL) { 504 struct netconfig *nconf, *tmpnconf = NULL; 505 void *nc_handle; 506 int fd; 507 508 nc_handle = setnetconfig(); 509 if (nc_handle == NULL) { 510 /* fails to open netconfig file */ 511 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 512 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 513 mutex_unlock(&loopnconf_lock); 514 return (NULL); 515 } 516 while ((nconf = getnetconfig(nc_handle)) != NULL) { 517 #ifdef INET6 518 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 || 519 #else 520 if (( 521 #endif 522 strcmp(nconf->nc_protofmly, NC_INET) == 0) && 523 (nconf->nc_semantics == NC_TPI_COTS || 524 nconf->nc_semantics == NC_TPI_COTS_ORD)) { 525 fd = __rpc_nconf2fd(nconf); 526 /* 527 * Can't create a socket, assume that 528 * this family isn't configured in the kernel. 529 */ 530 if (fd < 0) 531 continue; 532 _close(fd); 533 tmpnconf = nconf; 534 if (!strcmp(nconf->nc_protofmly, NC_INET)) 535 hostname = IN4_LOCALHOST_STRING; 536 else 537 hostname = IN6_LOCALHOST_STRING; 538 } 539 } 540 if (tmpnconf == NULL) { 541 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 542 mutex_unlock(&loopnconf_lock); 543 return (NULL); 544 } 545 loopnconf = getnetconfigent(tmpnconf->nc_netid); 546 /* loopnconf is never freed */ 547 endnetconfig(nc_handle); 548 } 549 mutex_unlock(&loopnconf_lock); 550 client = getclnthandle(hostname, loopnconf, NULL); 551 return (client); 552 } 553 554 /* 555 * Set a mapping between program, version and address. 556 * Calls the rpcbind service to do the mapping. 557 */ 558 bool_t 559 rpcb_set(program, version, nconf, address) 560 rpcprog_t program; 561 rpcvers_t version; 562 const struct netconfig *nconf; /* Network structure of transport */ 563 const struct netbuf *address; /* Services netconfig address */ 564 { 565 CLIENT *client; 566 bool_t rslt = FALSE; 567 RPCB parms; 568 char uidbuf[32]; 569 570 /* parameter checking */ 571 if (nconf == NULL) { 572 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 573 return (FALSE); 574 } 575 if (address == NULL) { 576 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 577 return (FALSE); 578 } 579 client = local_rpcb(); 580 if (! client) { 581 return (FALSE); 582 } 583 584 /* convert to universal */ 585 /*LINTED const castaway*/ 586 parms.r_addr = taddr2uaddr((struct netconfig *) nconf, 587 (struct netbuf *)address); 588 if (!parms.r_addr) { 589 CLNT_DESTROY(client); 590 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 591 return (FALSE); /* no universal address */ 592 } 593 parms.r_prog = program; 594 parms.r_vers = version; 595 parms.r_netid = nconf->nc_netid; 596 /* 597 * Though uid is not being used directly, we still send it for 598 * completeness. For non-unix platforms, perhaps some other 599 * string or an empty string can be sent. 600 */ 601 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 602 parms.r_owner = uidbuf; 603 604 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb, 605 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 606 (char *)(void *)&rslt, tottimeout); 607 608 CLNT_DESTROY(client); 609 free(parms.r_addr); 610 return (rslt); 611 } 612 613 /* 614 * Remove the mapping between program, version and netbuf address. 615 * Calls the rpcbind service to do the un-mapping. 616 * If netbuf is NULL, unset for all the transports, otherwise unset 617 * only for the given transport. 618 */ 619 bool_t 620 rpcb_unset(program, version, nconf) 621 rpcprog_t program; 622 rpcvers_t version; 623 const struct netconfig *nconf; 624 { 625 CLIENT *client; 626 bool_t rslt = FALSE; 627 RPCB parms; 628 char uidbuf[32]; 629 630 client = local_rpcb(); 631 if (! client) { 632 return (FALSE); 633 } 634 635 parms.r_prog = program; 636 parms.r_vers = version; 637 if (nconf) 638 parms.r_netid = nconf->nc_netid; 639 else { 640 /*LINTED const castaway*/ 641 parms.r_netid = (char *) &nullstring[0]; /* unsets all */ 642 } 643 /*LINTED const castaway*/ 644 parms.r_addr = (char *) &nullstring[0]; 645 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid()); 646 parms.r_owner = uidbuf; 647 648 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb, 649 (char *)(void *)&parms, (xdrproc_t) xdr_bool, 650 (char *)(void *)&rslt, tottimeout); 651 652 CLNT_DESTROY(client); 653 return (rslt); 654 } 655 656 /* 657 * From the merged list, find the appropriate entry 658 */ 659 static struct netbuf * 660 got_entry(relp, nconf) 661 rpcb_entry_list_ptr relp; 662 const struct netconfig *nconf; 663 { 664 struct netbuf *na = NULL; 665 rpcb_entry_list_ptr sp; 666 rpcb_entry *rmap; 667 668 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) { 669 rmap = &sp->rpcb_entry_map; 670 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) && 671 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) && 672 (nconf->nc_semantics == rmap->r_nc_semantics) && 673 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) { 674 na = uaddr2taddr(nconf, rmap->r_maddr); 675 #ifdef ND_DEBUG 676 fprintf(stderr, "\tRemote address is [%s].\n", 677 rmap->r_maddr); 678 if (!na) 679 fprintf(stderr, 680 "\tCouldn't resolve remote address!\n"); 681 #endif 682 break; 683 } 684 } 685 return (na); 686 } 687 688 /* 689 * Quick check to see if rpcbind is up. Tries to connect over 690 * local transport. 691 */ 692 static bool_t 693 __rpcbind_is_up() 694 { 695 struct netconfig *nconf; 696 struct sockaddr_un sun; 697 void *localhandle; 698 int sock; 699 700 nconf = NULL; 701 localhandle = setnetconfig(); 702 while ((nconf = getnetconfig(localhandle)) != NULL) { 703 if (nconf->nc_protofmly != NULL && 704 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 705 break; 706 } 707 if (nconf == NULL) 708 return (FALSE); 709 710 endnetconfig(localhandle); 711 712 memset(&sun, 0, sizeof sun); 713 sock = _socket(AF_LOCAL, SOCK_STREAM, 0); 714 if (sock < 0) 715 return (FALSE); 716 sun.sun_family = AF_LOCAL; 717 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path)); 718 sun.sun_len = SUN_LEN(&sun); 719 720 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) { 721 _close(sock); 722 return (FALSE); 723 } 724 725 _close(sock); 726 return (TRUE); 727 } 728 729 /* 730 * An internal function which optimizes rpcb_getaddr function. It also 731 * returns the client handle that it uses to contact the remote rpcbind. 732 * 733 * The algorithm used: If the transports is TCP or UDP, it first tries 734 * version 2 (portmap), 4 and then 3 (svr4). This order should be 735 * changed in the next OS release to 4, 2 and 3. We are assuming that by 736 * that time, version 4 would be available on many machines on the network. 737 * With this algorithm, we get performance as well as a plan for 738 * obsoleting version 2. 739 * 740 * For all other transports, the algorithm remains as 4 and then 3. 741 * 742 * XXX: Due to some problems with t_connect(), we do not reuse the same client 743 * handle for COTS cases and hence in these cases we do not return the 744 * client handle. This code will change if t_connect() ever 745 * starts working properly. Also look under clnt_vc.c. 746 */ 747 struct netbuf * 748 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp) 749 rpcprog_t program; 750 rpcvers_t version; 751 const struct netconfig *nconf; 752 const char *host; 753 CLIENT **clpp; 754 struct timeval *tp; 755 { 756 static bool_t check_rpcbind = TRUE; 757 CLIENT *client = NULL; 758 RPCB parms; 759 enum clnt_stat clnt_st; 760 char *ua = NULL; 761 rpcvers_t vers; 762 struct netbuf *address = NULL; 763 rpcvers_t start_vers = RPCBVERS4; 764 struct netbuf servaddr; 765 766 /* parameter checking */ 767 if (nconf == NULL) { 768 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 769 return (NULL); 770 } 771 772 parms.r_addr = NULL; 773 774 /* 775 * Use default total timeout if no timeout is specified. 776 */ 777 if (tp == NULL) 778 tp = &tottimeout; 779 780 #ifdef PORTMAP 781 /* Try version 2 for TCP or UDP */ 782 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 783 u_short port = 0; 784 struct netbuf remote; 785 rpcvers_t pmapvers = 2; 786 struct pmap pmapparms; 787 788 /* 789 * Try UDP only - there are some portmappers out 790 * there that use UDP only. 791 */ 792 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 793 struct netconfig *newnconf; 794 795 if ((newnconf = getnetconfigent("udp")) == NULL) { 796 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 797 return (NULL); 798 } 799 client = getclnthandle(host, newnconf, &parms.r_addr); 800 freenetconfigent(newnconf); 801 } else { 802 client = getclnthandle(host, nconf, &parms.r_addr); 803 } 804 if (client == NULL) 805 return (NULL); 806 807 /* 808 * Set version and retry timeout. 809 */ 810 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 811 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers); 812 813 pmapparms.pm_prog = program; 814 pmapparms.pm_vers = version; 815 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ? 816 IPPROTO_UDP : IPPROTO_TCP; 817 pmapparms.pm_port = 0; /* not needed */ 818 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 819 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms, 820 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port, 821 *tp); 822 if (clnt_st != RPC_SUCCESS) { 823 if ((clnt_st == RPC_PROGVERSMISMATCH) || 824 (clnt_st == RPC_PROGUNAVAIL)) 825 goto try_rpcbind; /* Try different versions */ 826 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 827 clnt_geterr(client, &rpc_createerr.cf_error); 828 goto error; 829 } else if (port == 0) { 830 address = NULL; 831 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 832 goto error; 833 } 834 port = htons(port); 835 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote); 836 if (((address = (struct netbuf *) 837 malloc(sizeof (struct netbuf))) == NULL) || 838 ((address->buf = (char *) 839 malloc(remote.len)) == NULL)) { 840 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 841 clnt_geterr(client, &rpc_createerr.cf_error); 842 if (address) { 843 free(address); 844 address = NULL; 845 } 846 goto error; 847 } 848 memcpy(address->buf, remote.buf, remote.len); 849 memcpy(&((char *)address->buf)[sizeof (short)], 850 (char *)(void *)&port, sizeof (short)); 851 address->len = address->maxlen = remote.len; 852 goto done; 853 } 854 #endif /* PORTMAP */ 855 856 try_rpcbind: 857 /* 858 * Check if rpcbind is up. This prevents needless delays when 859 * accessing applications such as the keyserver while booting 860 * disklessly. 861 */ 862 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 863 if (!__rpcbind_is_up()) { 864 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 865 rpc_createerr.cf_error.re_errno = 0; 866 goto error; 867 } 868 check_rpcbind = FALSE; 869 } 870 871 /* 872 * Now we try version 4 and then 3. 873 * We also send the remote system the address we used to 874 * contact it in case it can help to connect back with us 875 */ 876 parms.r_prog = program; 877 parms.r_vers = version; 878 /*LINTED const castaway*/ 879 parms.r_owner = (char *) &nullstring[0]; /* not needed; */ 880 /* just for xdring */ 881 parms.r_netid = nconf->nc_netid; /* not really needed */ 882 883 /* 884 * If a COTS transport is being used, try getting address via CLTS 885 * transport. This works only with version 4. 886 */ 887 if (nconf->nc_semantics == NC_TPI_COTS_ORD || 888 nconf->nc_semantics == NC_TPI_COTS) { 889 890 void *handle; 891 struct netconfig *nconf_clts; 892 rpcb_entry_list_ptr relp = NULL; 893 894 if (client == NULL) { 895 /* This did not go through the above PORTMAP/TCP code */ 896 if ((handle = __rpc_setconf("datagram_v")) != NULL) { 897 while ((nconf_clts = __rpc_getconf(handle)) 898 != NULL) { 899 if (strcmp(nconf_clts->nc_protofmly, 900 nconf->nc_protofmly) != 0) { 901 continue; 902 } 903 client = getclnthandle(host, nconf_clts, 904 &parms.r_addr); 905 break; 906 } 907 __rpc_endconf(handle); 908 } 909 if (client == NULL) 910 goto regular_rpcbind; /* Go the regular way */ 911 } else { 912 /* This is a UDP PORTMAP handle. Change to version 4 */ 913 vers = RPCBVERS4; 914 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 915 } 916 /* 917 * We also send the remote system the address we used to 918 * contact it in case it can help it connect back with us 919 */ 920 if (parms.r_addr == NULL) { 921 /*LINTED const castaway*/ 922 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */ 923 } 924 925 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime); 926 927 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST, 928 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 929 (xdrproc_t) xdr_rpcb_entry_list_ptr, 930 (char *)(void *)&relp, *tp); 931 if (clnt_st == RPC_SUCCESS) { 932 if ((address = got_entry(relp, nconf)) != NULL) { 933 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 934 (char *)(void *)&relp); 935 CLNT_CONTROL(client, CLGET_SVC_ADDR, 936 (char *)(void *)&servaddr); 937 __rpc_fixup_addr(address, &servaddr); 938 goto done; 939 } 940 /* Entry not found for this transport */ 941 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr, 942 (char *)(void *)&relp); 943 /* 944 * XXX: should have perhaps returned with error but 945 * since the remote machine might not always be able 946 * to send the address on all transports, we try the 947 * regular way with regular_rpcbind 948 */ 949 goto regular_rpcbind; 950 } else if ((clnt_st == RPC_PROGVERSMISMATCH) || 951 (clnt_st == RPC_PROGUNAVAIL)) { 952 start_vers = RPCBVERS; /* Try version 3 now */ 953 goto regular_rpcbind; /* Try different versions */ 954 } else { 955 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 956 clnt_geterr(client, &rpc_createerr.cf_error); 957 goto error; 958 } 959 } 960 961 regular_rpcbind: 962 963 /* Now the same transport is to be used to get the address */ 964 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) || 965 (nconf->nc_semantics == NC_TPI_COTS))) { 966 /* A CLTS type of client - destroy it */ 967 CLNT_DESTROY(client); 968 client = NULL; 969 } 970 971 if (client == NULL) { 972 client = getclnthandle(host, nconf, &parms.r_addr); 973 if (client == NULL) { 974 goto error; 975 } 976 } 977 if (parms.r_addr == NULL) { 978 /*LINTED const castaway*/ 979 parms.r_addr = (char *) &nullstring[0]; 980 } 981 982 /* First try from start_vers and then version 3 (RPCBVERS) */ 983 984 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime); 985 for (vers = start_vers; vers >= RPCBVERS; vers--) { 986 /* Set the version */ 987 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 988 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR, 989 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms, 990 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp); 991 if (clnt_st == RPC_SUCCESS) { 992 if ((ua == NULL) || (ua[0] == 0)) { 993 /* address unknown */ 994 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 995 goto error; 996 } 997 address = uaddr2taddr(nconf, ua); 998 #ifdef ND_DEBUG 999 fprintf(stderr, "\tRemote address is [%s]\n", ua); 1000 if (!address) 1001 fprintf(stderr, 1002 "\tCouldn't resolve remote address!\n"); 1003 #endif 1004 xdr_free((xdrproc_t)xdr_wrapstring, 1005 (char *)(void *)&ua); 1006 1007 if (! address) { 1008 /* We don't know about your universal address */ 1009 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE; 1010 goto error; 1011 } 1012 CLNT_CONTROL(client, CLGET_SVC_ADDR, 1013 (char *)(void *)&servaddr); 1014 __rpc_fixup_addr(address, &servaddr); 1015 goto done; 1016 } else if (clnt_st == RPC_PROGVERSMISMATCH) { 1017 struct rpc_err rpcerr; 1018 1019 clnt_geterr(client, &rpcerr); 1020 if (rpcerr.re_vers.low > RPCBVERS4) 1021 goto error; /* a new version, can't handle */ 1022 } else if (clnt_st != RPC_PROGUNAVAIL) { 1023 /* Cant handle this error */ 1024 rpc_createerr.cf_stat = clnt_st; 1025 clnt_geterr(client, &rpc_createerr.cf_error); 1026 goto error; 1027 } 1028 } 1029 1030 error: 1031 if (client) { 1032 CLNT_DESTROY(client); 1033 client = NULL; 1034 } 1035 done: 1036 if (nconf->nc_semantics != NC_TPI_CLTS) { 1037 /* This client is the connectionless one */ 1038 if (client) { 1039 CLNT_DESTROY(client); 1040 client = NULL; 1041 } 1042 } 1043 if (clpp) { 1044 *clpp = client; 1045 } else if (client) { 1046 CLNT_DESTROY(client); 1047 } 1048 if (parms.r_addr != NULL && parms.r_addr != nullstring) 1049 free(parms.r_addr); 1050 return (address); 1051 } 1052 1053 1054 /* 1055 * Find the mapped address for program, version. 1056 * Calls the rpcbind service remotely to do the lookup. 1057 * Uses the transport specified in nconf. 1058 * Returns FALSE (0) if no map exists, else returns 1. 1059 * 1060 * Assuming that the address is all properly allocated 1061 */ 1062 int 1063 rpcb_getaddr(program, version, nconf, address, host) 1064 rpcprog_t program; 1065 rpcvers_t version; 1066 const struct netconfig *nconf; 1067 struct netbuf *address; 1068 const char *host; 1069 { 1070 struct netbuf *na; 1071 1072 if ((na = __rpcb_findaddr_timed(program, version, 1073 (struct netconfig *) nconf, (char *) host, 1074 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL) 1075 return (FALSE); 1076 1077 if (na->len > address->maxlen) { 1078 /* Too long address */ 1079 free(na->buf); 1080 free(na); 1081 rpc_createerr.cf_stat = RPC_FAILED; 1082 return (FALSE); 1083 } 1084 memcpy(address->buf, na->buf, (size_t)na->len); 1085 address->len = na->len; 1086 free(na->buf); 1087 free(na); 1088 return (TRUE); 1089 } 1090 1091 /* 1092 * Get a copy of the current maps. 1093 * Calls the rpcbind service remotely to get the maps. 1094 * 1095 * It returns only a list of the services 1096 * It returns NULL on failure. 1097 */ 1098 rpcblist * 1099 rpcb_getmaps(nconf, host) 1100 const struct netconfig *nconf; 1101 const char *host; 1102 { 1103 rpcblist_ptr head = NULL; 1104 CLIENT *client; 1105 enum clnt_stat clnt_st; 1106 rpcvers_t vers = 0; 1107 1108 client = getclnthandle(host, nconf, NULL); 1109 if (client == NULL) { 1110 return (head); 1111 } 1112 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1113 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1114 (char *)(void *)&head, tottimeout); 1115 if (clnt_st == RPC_SUCCESS) 1116 goto done; 1117 1118 if ((clnt_st != RPC_PROGVERSMISMATCH) && 1119 (clnt_st != RPC_PROGUNAVAIL)) { 1120 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1121 clnt_geterr(client, &rpc_createerr.cf_error); 1122 goto done; 1123 } 1124 1125 /* fall back to earlier version */ 1126 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1127 if (vers == RPCBVERS4) { 1128 vers = RPCBVERS; 1129 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1130 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP, 1131 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr, 1132 (char *)(void *)&head, tottimeout) == RPC_SUCCESS) 1133 goto done; 1134 } 1135 rpc_createerr.cf_stat = RPC_RPCBFAILURE; 1136 clnt_geterr(client, &rpc_createerr.cf_error); 1137 1138 done: 1139 CLNT_DESTROY(client); 1140 return (head); 1141 } 1142 1143 /* 1144 * rpcbinder remote-call-service interface. 1145 * This routine is used to call the rpcbind remote call service 1146 * which will look up a service program in the address maps, and then 1147 * remotely call that routine with the given parameters. This allows 1148 * programs to do a lookup and call in one step. 1149 */ 1150 enum clnt_stat 1151 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp, 1152 xdrres, resp, tout, addr_ptr) 1153 const struct netconfig *nconf; /* Netconfig structure */ 1154 const char *host; /* Remote host name */ 1155 rpcprog_t prog; 1156 rpcvers_t vers; 1157 rpcproc_t proc; /* Remote proc identifiers */ 1158 xdrproc_t xdrargs, xdrres; /* XDR routines */ 1159 caddr_t argsp, resp; /* Argument and Result */ 1160 struct timeval tout; /* Timeout value for this call */ 1161 const struct netbuf *addr_ptr; /* Preallocated netbuf address */ 1162 { 1163 CLIENT *client; 1164 enum clnt_stat stat; 1165 struct r_rpcb_rmtcallargs a; 1166 struct r_rpcb_rmtcallres r; 1167 rpcvers_t rpcb_vers; 1168 1169 stat = 0; 1170 client = getclnthandle(host, nconf, NULL); 1171 if (client == NULL) { 1172 return (RPC_FAILED); 1173 } 1174 /*LINTED const castaway*/ 1175 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout); 1176 a.prog = prog; 1177 a.vers = vers; 1178 a.proc = proc; 1179 a.args.args_val = argsp; 1180 a.xdr_args = xdrargs; 1181 r.addr = NULL; 1182 r.results.results_val = resp; 1183 r.xdr_res = xdrres; 1184 1185 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) { 1186 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers); 1187 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT, 1188 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a, 1189 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout); 1190 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) { 1191 struct netbuf *na; 1192 /*LINTED const castaway*/ 1193 na = uaddr2taddr((struct netconfig *) nconf, r.addr); 1194 if (!na) { 1195 stat = RPC_N2AXLATEFAILURE; 1196 /*LINTED const castaway*/ 1197 ((struct netbuf *) addr_ptr)->len = 0; 1198 goto error; 1199 } 1200 if (na->len > addr_ptr->maxlen) { 1201 /* Too long address */ 1202 stat = RPC_FAILED; /* XXX A better error no */ 1203 free(na->buf); 1204 free(na); 1205 /*LINTED const castaway*/ 1206 ((struct netbuf *) addr_ptr)->len = 0; 1207 goto error; 1208 } 1209 memcpy(addr_ptr->buf, na->buf, (size_t)na->len); 1210 /*LINTED const castaway*/ 1211 ((struct netbuf *)addr_ptr)->len = na->len; 1212 free(na->buf); 1213 free(na); 1214 break; 1215 } else if ((stat != RPC_PROGVERSMISMATCH) && 1216 (stat != RPC_PROGUNAVAIL)) { 1217 goto error; 1218 } 1219 } 1220 error: 1221 CLNT_DESTROY(client); 1222 if (r.addr) 1223 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr); 1224 return (stat); 1225 } 1226 1227 /* 1228 * Gets the time on the remote host. 1229 * Returns 1 if succeeds else 0. 1230 */ 1231 bool_t 1232 rpcb_gettime(host, timep) 1233 const char *host; 1234 time_t *timep; 1235 { 1236 CLIENT *client = NULL; 1237 void *handle; 1238 struct netconfig *nconf; 1239 rpcvers_t vers; 1240 enum clnt_stat st; 1241 1242 1243 if ((host == NULL) || (host[0] == 0)) { 1244 time(timep); 1245 return (TRUE); 1246 } 1247 1248 if ((handle = __rpc_setconf("netpath")) == NULL) { 1249 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1250 return (FALSE); 1251 } 1252 rpc_createerr.cf_stat = RPC_SUCCESS; 1253 while (client == NULL) { 1254 if ((nconf = __rpc_getconf(handle)) == NULL) { 1255 if (rpc_createerr.cf_stat == RPC_SUCCESS) 1256 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1257 break; 1258 } 1259 client = getclnthandle(host, nconf, NULL); 1260 if (client) 1261 break; 1262 } 1263 __rpc_endconf(handle); 1264 if (client == (CLIENT *) NULL) { 1265 return (FALSE); 1266 } 1267 1268 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1269 (xdrproc_t) xdr_void, NULL, 1270 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout); 1271 1272 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) { 1273 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers); 1274 if (vers == RPCBVERS4) { 1275 /* fall back to earlier version */ 1276 vers = RPCBVERS; 1277 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers); 1278 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME, 1279 (xdrproc_t) xdr_void, NULL, 1280 (xdrproc_t) xdr_int, (char *)(void *)timep, 1281 tottimeout); 1282 } 1283 } 1284 CLNT_DESTROY(client); 1285 return (st == RPC_SUCCESS? TRUE: FALSE); 1286 } 1287 1288 /* 1289 * Converts taddr to universal address. This routine should never 1290 * really be called because local n2a libraries are always provided. 1291 */ 1292 char * 1293 rpcb_taddr2uaddr(nconf, taddr) 1294 struct netconfig *nconf; 1295 struct netbuf *taddr; 1296 { 1297 CLIENT *client; 1298 char *uaddr = NULL; 1299 1300 1301 /* parameter checking */ 1302 if (nconf == NULL) { 1303 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1304 return (NULL); 1305 } 1306 if (taddr == NULL) { 1307 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1308 return (NULL); 1309 } 1310 client = local_rpcb(); 1311 if (! client) { 1312 return (NULL); 1313 } 1314 1315 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR, 1316 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1317 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout); 1318 CLNT_DESTROY(client); 1319 return (uaddr); 1320 } 1321 1322 /* 1323 * Converts universal address to netbuf. This routine should never 1324 * really be called because local n2a libraries are always provided. 1325 */ 1326 struct netbuf * 1327 rpcb_uaddr2taddr(nconf, uaddr) 1328 struct netconfig *nconf; 1329 char *uaddr; 1330 { 1331 CLIENT *client; 1332 struct netbuf *taddr; 1333 1334 1335 /* parameter checking */ 1336 if (nconf == NULL) { 1337 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 1338 return (NULL); 1339 } 1340 if (uaddr == NULL) { 1341 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 1342 return (NULL); 1343 } 1344 client = local_rpcb(); 1345 if (! client) { 1346 return (NULL); 1347 } 1348 1349 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf)); 1350 if (taddr == NULL) { 1351 CLNT_DESTROY(client); 1352 return (NULL); 1353 } 1354 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR, 1355 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, 1356 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr, 1357 tottimeout) != RPC_SUCCESS) { 1358 free(taddr); 1359 taddr = NULL; 1360 } 1361 CLNT_DESTROY(client); 1362 return (taddr); 1363 } 1364