lib/libc/rpc/rpcb_clnt.c

   1 /*      $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2010, Oracle America, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  * - Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright notice,
  12  *   this list of conditions and the following disclaimer in the documentation
  13  *   and/or other materials provided with the distribution.
  14  * - Neither the name of the "Oracle America, Inc." nor the names of its
  15  *   contributors may be used to endorse or promote products derived
  16  *   from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* #ident       "@(#)rpcb_clnt.c        1.27    94/04/24 SMI" */
  32
  33
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
  36 #endif
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD$");
  39
  40 /*
  41  * rpcb_clnt.c
  42  * interface to rpcbind rpc service.
  43  */
  44
  45 #include "namespace.h"
  46 #include "reentrant.h"
  47 #include <sys/types.h>
  48 #include <sys/socket.h>
  49 #include <sys/un.h>
  50 #include <sys/utsname.h>
  51 #include <rpc/rpc.h>
  52 #include <rpc/rpcb_prot.h>
  53 #include <rpc/nettype.h>
  54 #include <netconfig.h>
  55 #ifdef PORTMAP
  56 #include <netinet/in.h>         /* FOR IPPROTO_TCP/UDP definitions */
  57 #include <rpc/pmap_prot.h>
  58 #endif                          /* PORTMAP */
  59 #include <stdio.h>
  60 #include <errno.h>
  61 #include <stdlib.h>
  62 #include <string.h>
  63 #include <unistd.h>
  64 #include <netdb.h>
  65 #include <syslog.h>
  66 #include "un-namespace.h"
  67
  68 #include "rpc_com.h"
  69 #include "mt_misc.h"
  70
  71 static struct timeval tottimeout = { 60, 0 };
  72 static const struct timeval rmttimeout = { 3, 0 };
  73 static struct timeval rpcbrmttime = { 15, 0 };
  74
  75 extern bool_t xdr_wrapstring(XDR *, char **);
  76
  77 static const char nullstring[] = "\000";
  78
  79 #define CACHESIZE 6
  80
  81 struct address_cache {
  82         char *ac_host;
  83         char *ac_netid;
  84         char *ac_uaddr;
  85         struct netbuf *ac_taddr;
  86         struct address_cache *ac_next;
  87 };
  88
  89 static struct address_cache *front;
  90 static int cachesize;
  91
  92 #define CLCR_GET_RPCB_TIMEOUT   1
  93 #define CLCR_SET_RPCB_TIMEOUT   2
  94
  95
  96 extern int __rpc_lowvers;
  97
  98 static struct address_cache *check_cache(const char *, const char *);
  99 static void delete_cache(struct netbuf *);
 100 static void add_cache(const char *, const char *, struct netbuf *, char *);
 101 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
 102 static CLIENT *local_rpcb(void);
 103 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
 104
 105 /*
 106  * This routine adjusts the timeout used for calls to the remote rpcbind.
 107  * Also, this routine can be used to set the use of portmapper version 2
 108  * only when doing rpc_broadcasts
 109  * These are private routines that may not be provided in future releases.
 110  */
 111 bool_t
 112 __rpc_control(int request, void *info)
 113 {
 114         switch (request) {
 115         case CLCR_GET_RPCB_TIMEOUT:
 116                 *(struct timeval *)info = tottimeout;
 117                 break;
 118         case CLCR_SET_RPCB_TIMEOUT:
 119                 tottimeout = *(struct timeval *)info;
 120                 break;
 121         case CLCR_SET_LOWVERS:
 122                 __rpc_lowvers = *(int *)info;
 123                 break;
 124         case CLCR_GET_LOWVERS:
 125                 *(int *)info = __rpc_lowvers;
 126                 break;
 127         default:
 128                 return (FALSE);
 129         }
 130         return (TRUE);
 131 }
 132
 133 /*
 134  *      It might seem that a reader/writer lock would be more reasonable here.
 135  *      However because getclnthandle(), the only user of the cache functions,
 136  *      may do a delete_cache() operation if a check_cache() fails to return an
 137  *      address useful to clnt_tli_create(), we may as well use a mutex.
 138  */
 139 /*
 140  * As it turns out, if the cache lock is *not* a reader/writer lock, we will
 141  * block all clnt_create's if we are trying to connect to a host that's down,
 142  * since the lock will be held all during that time.
 143  */
 144
 145 /*
 146  * The routines check_cache(), add_cache(), delete_cache() manage the
 147  * cache of rpcbind addresses for (host, netid).
 148  */
 149
 150 static struct address_cache *
 151 check_cache(const char *host, const char *netid)
 152 {
 153         struct address_cache *cptr;
 154
 155         /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 156
 157         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 158                 if (!strcmp(cptr->ac_host, host) &&
 159                     !strcmp(cptr->ac_netid, netid)) {
 160 #ifdef ND_DEBUG
 161                         fprintf(stderr, "Found cache entry for %s: %s\n",
 162                                 host, netid);
 163 #endif
 164                         return (cptr);
 165                 }
 166         }
 167         return ((struct address_cache *) NULL);
 168 }
 169
 170 static void
 171 delete_cache(struct netbuf *addr)
 172 {
 173         struct address_cache *cptr, *prevptr = NULL;
 174
 175         /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 176         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 177                 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
 178                         free(cptr->ac_host);
 179                         free(cptr->ac_netid);
 180                         free(cptr->ac_taddr->buf);
 181                         free(cptr->ac_taddr);
 182                         free(cptr->ac_uaddr);
 183                         if (prevptr)
 184                                 prevptr->ac_next = cptr->ac_next;
 185                         else
 186                                 front = cptr->ac_next;
 187                         free(cptr);
 188                         cachesize--;
 189                         break;
 190                 }
 191                 prevptr = cptr;
 192         }
 193 }
 194
 195 static void
 196 add_cache(const char *host, const char *netid, struct netbuf *taddr,
 197     char *uaddr)
 198 {
 199         struct address_cache  *ad_cache, *cptr, *prevptr;
 200
 201         ad_cache = (struct address_cache *)
 202                         malloc(sizeof (struct address_cache));
 203         if (!ad_cache) {
 204                 return;
 205         }
 206         ad_cache->ac_host = strdup(host);
 207         ad_cache->ac_netid = strdup(netid);
 208         ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
 209         ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
 210         if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
 211                 (uaddr && !ad_cache->ac_uaddr)) {
 212                 goto out;
 213         }
 214         ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
 215         ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
 216         if (ad_cache->ac_taddr->buf == NULL) {
 217 out:
 218                 free(ad_cache->ac_host);
 219                 free(ad_cache->ac_netid);
 220                 free(ad_cache->ac_uaddr);
 221                 free(ad_cache->ac_taddr);
 222                 free(ad_cache);
 223                 return;
 224         }
 225         memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
 226 #ifdef ND_DEBUG
 227         fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
 228 #endif
 229
 230 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  cptr */
 231
 232         rwlock_wrlock(&rpcbaddr_cache_lock);
 233         if (cachesize < CACHESIZE) {
 234                 ad_cache->ac_next = front;
 235                 front = ad_cache;
 236                 cachesize++;
 237         } else {
 238                 /* Free the last entry */
 239                 cptr = front;
 240                 prevptr = NULL;
 241                 while (cptr->ac_next) {
 242                         prevptr = cptr;
 243                         cptr = cptr->ac_next;
 244                 }
 245
 246 #ifdef ND_DEBUG
 247                 fprintf(stderr, "Deleted from cache: %s : %s\n",
 248                         cptr->ac_host, cptr->ac_netid);
 249 #endif
 250                 free(cptr->ac_host);
 251                 free(cptr->ac_netid);
 252                 free(cptr->ac_taddr->buf);
 253                 free(cptr->ac_taddr);
 254                 free(cptr->ac_uaddr);
 255
 256                 if (prevptr) {
 257                         prevptr->ac_next = NULL;
 258                         ad_cache->ac_next = front;
 259                         front = ad_cache;
 260                 } else {
 261                         front = ad_cache;
 262                         ad_cache->ac_next = NULL;
 263                 }
 264                 free(cptr);
 265         }
 266         rwlock_unlock(&rpcbaddr_cache_lock);
 267 }
 268
 269 /*
 270  * This routine will return a client handle that is connected to the
 271  * rpcbind. If targaddr is non-NULL, the "universal address" of the
 272  * host will be stored in *targaddr; the caller is responsible for
 273  * freeing this string.
 274  * On error, returns NULL and free's everything.
 275  */
 276 static CLIENT *
 277 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
 278 {
 279         CLIENT *client;
 280         struct netbuf *addr, taddr;
 281         struct netbuf addr_to_delete;
 282         struct __rpc_sockinfo si;
 283         struct addrinfo hints, *res, *tres;
 284         struct address_cache *ad_cache;
 285         char *tmpaddr;
 286
 287 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  ad_cache */
 288
 289         /* Get the address of the rpcbind.  Check cache first */
 290         client = NULL;
 291         addr_to_delete.len = 0;
 292         rwlock_rdlock(&rpcbaddr_cache_lock);
 293         ad_cache = NULL;
 294         if (host != NULL)
 295                 ad_cache = check_cache(host, nconf->nc_netid);
 296         if (ad_cache != NULL) {
 297                 addr = ad_cache->ac_taddr;
 298                 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
 299                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 300                 if (client != NULL) {
 301                         if (targaddr)
 302                                 *targaddr = strdup(ad_cache->ac_uaddr);
 303                         rwlock_unlock(&rpcbaddr_cache_lock);
 304                         return (client);
 305                 }
 306                 addr_to_delete.len = addr->len;
 307                 addr_to_delete.buf = (char *)malloc(addr->len);
 308                 if (addr_to_delete.buf == NULL) {
 309                         addr_to_delete.len = 0;
 310                 } else {
 311                         memcpy(addr_to_delete.buf, addr->buf, addr->len);
 312                 }
 313         }
 314         rwlock_unlock(&rpcbaddr_cache_lock);
 315         if (addr_to_delete.len != 0) {
 316                 /*
 317                  * Assume this may be due to cache data being
 318                  *  outdated
 319                  */
 320                 rwlock_wrlock(&rpcbaddr_cache_lock);
 321                 delete_cache(&addr_to_delete);
 322                 rwlock_unlock(&rpcbaddr_cache_lock);
 323                 free(addr_to_delete.buf);
 324         }
 325         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 326                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 327                 return NULL;
 328         }
 329
 330         memset(&hints, 0, sizeof hints);
 331         hints.ai_family = si.si_af;
 332         hints.ai_socktype = si.si_socktype;
 333         hints.ai_protocol = si.si_proto;
 334
 335 #ifdef CLNT_DEBUG
 336         printf("trying netid %s family %d proto %d socktype %d\n",
 337             nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
 338 #endif
 339
 340         if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 341                 client = local_rpcb();
 342                 if (! client) {
 343 #ifdef ND_DEBUG
 344                         clnt_pcreateerror("rpcbind clnt interface");
 345 #endif
 346                         return (NULL);
 347                 } else {
 348                         struct sockaddr_un sun;
 349                         if (targaddr) {
 350                             *targaddr = malloc(sizeof(sun.sun_path));
 351                             if (*targaddr == NULL) {
 352                                 CLNT_DESTROY(client);
 353                                 return (NULL);
 354                             }
 355                             strncpy(*targaddr, _PATH_RPCBINDSOCK,
 356                                 sizeof(sun.sun_path));
 357                         }
 358                         return (client);
 359                 }
 360         } else {
 361                 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
 362                         rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
 363                         return NULL;
 364                 }
 365         }
 366
 367         for (tres = res; tres != NULL; tres = tres->ai_next) {
 368                 taddr.buf = tres->ai_addr;
 369                 taddr.len = taddr.maxlen = tres->ai_addrlen;
 370
 371 #ifdef ND_DEBUG
 372                 {
 373                         char *ua;
 374
 375                         ua = taddr2uaddr(nconf, &taddr);
 376                         fprintf(stderr, "Got it [%s]\n", ua);
 377                         free(ua);
 378                 }
 379 #endif
 380
 381 #ifdef ND_DEBUG
 382                 {
 383                         int i;
 384
 385                         fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
 386                                 taddr.len, taddr.maxlen);
 387                         fprintf(stderr, "\tAddress is ");
 388                         for (i = 0; i < taddr.len; i++)
 389                                 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
 390                         fprintf(stderr, "\n");
 391                 }
 392 #endif
 393                 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
 394                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 395 #ifdef ND_DEBUG
 396                 if (! client) {
 397                         clnt_pcreateerror("rpcbind clnt interface");
 398                 }
 399 #endif
 400
 401                 if (client) {
 402                         tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
 403                         add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
 404                         if (targaddr)
 405                                 *targaddr = tmpaddr;
 406                         break;
 407                 }
 408         }
 409         if (res)
 410                 freeaddrinfo(res);
 411         return (client);
 412 }
 413
 414 /* XXX */
 415 #define IN4_LOCALHOST_STRING    "127.0.0.1"
 416 #define IN6_LOCALHOST_STRING    "::1"
 417
 418 /*
 419  * This routine will return a client handle that is connected to the local
 420  * rpcbind. Returns NULL on error and free's everything.
 421  */
 422 static CLIENT *
 423 local_rpcb(void)
 424 {
 425         CLIENT *client;
 426         static struct netconfig *loopnconf;
 427         static char *hostname;
 428         int sock;
 429         size_t tsize;
 430         struct netbuf nbuf;
 431         struct sockaddr_un sun;
 432
 433         /*
 434          * Try connecting to the local rpcbind through a local socket
 435          * first. If this doesn't work, try all transports defined in
 436          * the netconfig file.
 437          */
 438         memset(&sun, 0, sizeof sun);
 439         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 440         if (sock < 0)
 441                 goto try_nconf;
 442         sun.sun_family = AF_LOCAL;
 443         strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 444         nbuf.len = sun.sun_len = SUN_LEN(&sun);
 445         nbuf.maxlen = sizeof (struct sockaddr_un);
 446         nbuf.buf = &sun;
 447
 448         tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
 449         client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
 450             (rpcvers_t)RPCBVERS, tsize, tsize);
 451
 452         if (client != NULL) {
 453                 /* Mark the socket to be closed in destructor */
 454                 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
 455                 return client;
 456         }
 457
 458         /* Nobody needs this socket anymore; free the descriptor. */
 459         _close(sock);
 460
 461 try_nconf:
 462
 463 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
 464         mutex_lock(&loopnconf_lock);
 465         if (loopnconf == NULL) {
 466                 struct netconfig *nconf, *tmpnconf = NULL;
 467                 void *nc_handle;
 468                 int fd;
 469
 470                 nc_handle = setnetconfig();
 471                 if (nc_handle == NULL) {
 472                         /* fails to open netconfig file */
 473                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 474                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 475                         mutex_unlock(&loopnconf_lock);
 476                         return (NULL);
 477                 }
 478                 while ((nconf = getnetconfig(nc_handle)) != NULL) {
 479 #ifdef INET6
 480                         if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
 481 #else
 482                         if ((
 483 #endif
 484                              strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
 485                             (nconf->nc_semantics == NC_TPI_COTS ||
 486                              nconf->nc_semantics == NC_TPI_COTS_ORD)) {
 487                                 fd = __rpc_nconf2fd(nconf);
 488                                 /*
 489                                  * Can't create a socket, assume that
 490                                  * this family isn't configured in the kernel.
 491                                  */
 492                                 if (fd < 0)
 493                                         continue;
 494                                 _close(fd);
 495                                 tmpnconf = nconf;
 496                                 if (!strcmp(nconf->nc_protofmly, NC_INET))
 497                                         hostname = IN4_LOCALHOST_STRING;
 498                                 else
 499                                         hostname = IN6_LOCALHOST_STRING;
 500                         }
 501                 }
 502                 if (tmpnconf == NULL) {
 503                         endnetconfig(nc_handle);
 504                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 505                         mutex_unlock(&loopnconf_lock);
 506                         return (NULL);
 507                 }
 508                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 509                 /* loopnconf is never freed */
 510                 endnetconfig(nc_handle);
 511         }
 512         mutex_unlock(&loopnconf_lock);
 513         client = getclnthandle(hostname, loopnconf, NULL);
 514         return (client);
 515 }
 516
 517 /*
 518  * Set a mapping between program, version and address.
 519  * Calls the rpcbind service to do the mapping.
 520  *
 521  * nconf   - Network structure of transport
 522  * address - Services netconfig address
 523  */
 524 bool_t
 525 rpcb_set(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
 526     const struct netbuf *address)
 527 {
 528         CLIENT *client;
 529         bool_t rslt = FALSE;
 530         RPCB parms;
 531         char uidbuf[32];
 532
 533         /* parameter checking */
 534         if (nconf == NULL) {
 535                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 536                 return (FALSE);
 537         }
 538         if (address == NULL) {
 539                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 540                 return (FALSE);
 541         }
 542         client = local_rpcb();
 543         if (! client) {
 544                 return (FALSE);
 545         }
 546
 547         /* convert to universal */
 548         /*LINTED const castaway*/
 549         parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
 550                                    (struct netbuf *)address);
 551         if (!parms.r_addr) {
 552                 CLNT_DESTROY(client);
 553                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 554                 return (FALSE); /* no universal address */
 555         }
 556         parms.r_prog = program;
 557         parms.r_vers = version;
 558         parms.r_netid = nconf->nc_netid;
 559         /*
 560          * Though uid is not being used directly, we still send it for
 561          * completeness.  For non-unix platforms, perhaps some other
 562          * string or an empty string can be sent.
 563          */
 564         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 565         parms.r_owner = uidbuf;
 566
 567         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 568             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 569             (char *)(void *)&rslt, tottimeout);
 570
 571         CLNT_DESTROY(client);
 572         free(parms.r_addr);
 573         return (rslt);
 574 }
 575
 576 /*
 577  * Remove the mapping between program, version and netbuf address.
 578  * Calls the rpcbind service to do the un-mapping.
 579  * If netbuf is NULL, unset for all the transports, otherwise unset
 580  * only for the given transport.
 581  */
 582 bool_t
 583 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
 584 {
 585         CLIENT *client;
 586         bool_t rslt = FALSE;
 587         RPCB parms;
 588         char uidbuf[32];
 589
 590         client = local_rpcb();
 591         if (! client) {
 592                 return (FALSE);
 593         }
 594
 595         parms.r_prog = program;
 596         parms.r_vers = version;
 597         if (nconf)
 598                 parms.r_netid = nconf->nc_netid;
 599         else {
 600                 /*LINTED const castaway*/
 601                 parms.r_netid = (char *) &nullstring[0]; /* unsets  all */
 602         }
 603         /*LINTED const castaway*/
 604         parms.r_addr = (char *) &nullstring[0];
 605         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 606         parms.r_owner = uidbuf;
 607
 608         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 609             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 610             (char *)(void *)&rslt, tottimeout);
 611
 612         CLNT_DESTROY(client);
 613         return (rslt);
 614 }
 615
 616 /*
 617  * From the merged list, find the appropriate entry
 618  */
 619 static struct netbuf *
 620 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
 621 {
 622         struct netbuf *na = NULL;
 623         rpcb_entry_list_ptr sp;
 624         rpcb_entry *rmap;
 625
 626         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 627                 rmap = &sp->rpcb_entry_map;
 628                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 629                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 630                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 631                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 632                         na = uaddr2taddr(nconf, rmap->r_maddr);
 633 #ifdef ND_DEBUG
 634                         fprintf(stderr, "\tRemote address is [%s].\n",
 635                                 rmap->r_maddr);
 636                         if (!na)
 637                                 fprintf(stderr,
 638                                     "\tCouldn't resolve remote address!\n");
 639 #endif
 640                         break;
 641                 }
 642         }
 643         return (na);
 644 }
 645
 646 /*
 647  * Quick check to see if rpcbind is up.  Tries to connect over
 648  * local transport.
 649  */
 650 static bool_t
 651 __rpcbind_is_up(void)
 652 {
 653         struct netconfig *nconf;
 654         struct sockaddr_un sun;
 655         void *localhandle;
 656         int sock;
 657
 658         nconf = NULL;
 659         localhandle = setnetconfig();
 660         while ((nconf = getnetconfig(localhandle)) != NULL) {
 661                 if (nconf->nc_protofmly != NULL &&
 662                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 663                          break;
 664         }
 665         endnetconfig(localhandle);
 666
 667         if (nconf == NULL)
 668                 return (FALSE);
 669
 670         memset(&sun, 0, sizeof sun);
 671         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 672         if (sock < 0)
 673                 return (FALSE);
 674         sun.sun_family = AF_LOCAL;
 675         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 676         sun.sun_len = SUN_LEN(&sun);
 677
 678         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 679                 _close(sock);
 680                 return (FALSE);
 681         }
 682
 683         _close(sock);
 684         return (TRUE);
 685 }
 686
 687 /*
 688  * An internal function which optimizes rpcb_getaddr function.  It also
 689  * returns the client handle that it uses to contact the remote rpcbind.
 690  *
 691  * The algorithm used: If the transports is TCP or UDP, it first tries
 692  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 693  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 694  * that time, version 4 would be available on many machines on the network.
 695  * With this algorithm, we get performance as well as a plan for
 696  * obsoleting version 2.
 697  *
 698  * For all other transports, the algorithm remains as 4 and then 3.
 699  *
 700  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 701  * handle for COTS cases and hence in these cases we do not return the
 702  * client handle.  This code will change if t_connect() ever
 703  * starts working properly.  Also look under clnt_vc.c.
 704  */
 705 struct netbuf *
 706 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
 707     const struct netconfig *nconf, const char *host,
 708     CLIENT **clpp, struct timeval *tp)
 709 {
 710         static bool_t check_rpcbind = TRUE;
 711         CLIENT *client = NULL;
 712         RPCB parms;
 713         enum clnt_stat clnt_st;
 714         char *ua = NULL;
 715         rpcvers_t vers;
 716         struct netbuf *address = NULL;
 717         rpcvers_t start_vers = RPCBVERS4;
 718         struct netbuf servaddr;
 719
 720         /* parameter checking */
 721         if (nconf == NULL) {
 722                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 723                 return (NULL);
 724         }
 725
 726         parms.r_addr = NULL;
 727
 728         /*
 729          * Use default total timeout if no timeout is specified.
 730          */
 731         if (tp == NULL)
 732                 tp = &tottimeout;
 733
 734 #ifdef PORTMAP
 735         /* Try version 2 for TCP or UDP */
 736         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 737                 u_short port = 0;
 738                 struct netbuf remote;
 739                 rpcvers_t pmapvers = 2;
 740                 struct pmap pmapparms;
 741
 742                 /*
 743                  * Try UDP only - there are some portmappers out
 744                  * there that use UDP only.
 745                  */
 746                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 747                         struct netconfig *newnconf;
 748
 749                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 750                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 751                                 return (NULL);
 752                         }
 753                         client = getclnthandle(host, newnconf, &parms.r_addr);
 754                         freenetconfigent(newnconf);
 755                 } else {
 756                         client = getclnthandle(host, nconf, &parms.r_addr);
 757                 }
 758                 if (client == NULL)
 759                         return (NULL);
 760
 761                 /*
 762                  * Set version and retry timeout.
 763                  */
 764                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 765                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 766
 767                 pmapparms.pm_prog = program;
 768                 pmapparms.pm_vers = version;
 769                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 770                                         IPPROTO_UDP : IPPROTO_TCP;
 771                 pmapparms.pm_port = 0;  /* not needed */
 772                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 773                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 774                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 775                     *tp);
 776                 if (clnt_st != RPC_SUCCESS) {
 777                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 778                                 (clnt_st == RPC_PROGUNAVAIL))
 779                                 goto try_rpcbind; /* Try different versions */
 780                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 781                         clnt_geterr(client, &rpc_createerr.cf_error);
 782                         goto error;
 783                 } else if (port == 0) {
 784                         address = NULL;
 785                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 786                         goto error;
 787                 }
 788                 port = htons(port);
 789                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 790                 if (((address = (struct netbuf *)
 791                         malloc(sizeof (struct netbuf))) == NULL) ||
 792                     ((address->buf = (char *)
 793                         malloc(remote.len)) == NULL)) {
 794                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 795                         clnt_geterr(client, &rpc_createerr.cf_error);
 796                         free(address);
 797                         address = NULL;
 798                         goto error;
 799                 }
 800                 memcpy(address->buf, remote.buf, remote.len);
 801                 memcpy(&((char *)address->buf)[sizeof (short)],
 802                                 (char *)(void *)&port, sizeof (short));
 803                 address->len = address->maxlen = remote.len;
 804                 goto done;
 805         }
 806 #endif                          /* PORTMAP */
 807
 808 try_rpcbind:
 809         /*
 810          * Check if rpcbind is up.  This prevents needless delays when
 811          * accessing applications such as the keyserver while booting
 812          * disklessly.
 813          */
 814         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 815                 if (!__rpcbind_is_up()) {
 816                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 817                         rpc_createerr.cf_error.re_errno = 0;
 818                         goto error;
 819                 }
 820                 check_rpcbind = FALSE;
 821         }
 822
 823         /*
 824          * Now we try version 4 and then 3.
 825          * We also send the remote system the address we used to
 826          * contact it in case it can help to connect back with us
 827          */
 828         parms.r_prog = program;
 829         parms.r_vers = version;
 830         /*LINTED const castaway*/
 831         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 832                                                         /* just for xdring */
 833         parms.r_netid = nconf->nc_netid; /* not really needed */
 834
 835         /*
 836          * If a COTS transport is being used, try getting address via CLTS
 837          * transport.  This works only with version 4.
 838          */
 839         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 840                         nconf->nc_semantics == NC_TPI_COTS) {
 841
 842                 void *handle;
 843                 struct netconfig *nconf_clts;
 844                 rpcb_entry_list_ptr relp = NULL;
 845
 846                 if (client == NULL) {
 847                         /* This did not go through the above PORTMAP/TCP code */
 848                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 849                                 while ((nconf_clts = __rpc_getconf(handle))
 850                                         != NULL) {
 851                                         if (strcmp(nconf_clts->nc_protofmly,
 852                                                 nconf->nc_protofmly) != 0) {
 853                                                 continue;
 854                                         }
 855                                         client = getclnthandle(host, nconf_clts,
 856                                                         &parms.r_addr);
 857                                         break;
 858                                 }
 859                                 __rpc_endconf(handle);
 860                         }
 861                         if (client == NULL)
 862                                 goto regular_rpcbind;   /* Go the regular way */
 863                 } else {
 864                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 865                         vers = RPCBVERS4;
 866                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 867                 }
 868                 /*
 869                  * We also send the remote system the address we used to
 870                  * contact it in case it can help it connect back with us
 871                  */
 872                 if (parms.r_addr == NULL) {
 873                         /*LINTED const castaway*/
 874                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 875                 }
 876
 877                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 878
 879                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 880                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 881                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 882                     (char *)(void *)&relp, *tp);
 883                 if (clnt_st == RPC_SUCCESS) {
 884                         if ((address = got_entry(relp, nconf)) != NULL) {
 885                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 886                                     (char *)(void *)&relp);
 887                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 888                                         (char *)(void *)&servaddr);
 889                                 __rpc_fixup_addr(address, &servaddr);
 890                                 goto done;
 891                         }
 892                         /* Entry not found for this transport */
 893                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 894                             (char *)(void *)&relp);
 895                         /*
 896                          * XXX: should have perhaps returned with error but
 897                          * since the remote machine might not always be able
 898                          * to send the address on all transports, we try the
 899                          * regular way with regular_rpcbind
 900                          */
 901                         goto regular_rpcbind;
 902                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 903                         (clnt_st == RPC_PROGUNAVAIL)) {
 904                         start_vers = RPCBVERS;  /* Try version 3 now */
 905                         goto regular_rpcbind; /* Try different versions */
 906                 } else {
 907                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 908                         clnt_geterr(client, &rpc_createerr.cf_error);
 909                         goto error;
 910                 }
 911         }
 912
 913 regular_rpcbind:
 914
 915         /* Now the same transport is to be used to get the address */
 916         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 917                         (nconf->nc_semantics == NC_TPI_COTS))) {
 918                 /* A CLTS type of client - destroy it */
 919                 CLNT_DESTROY(client);
 920                 client = NULL;
 921         }
 922
 923         if (client == NULL) {
 924                 client = getclnthandle(host, nconf, &parms.r_addr);
 925                 if (client == NULL) {
 926                         goto error;
 927                 }
 928         }
 929         if (parms.r_addr == NULL) {
 930                 /*LINTED const castaway*/
 931                 parms.r_addr = (char *) &nullstring[0];
 932         }
 933
 934         /* First try from start_vers and then version 3 (RPCBVERS) */
 935
 936         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 937         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 938                 /* Set the version */
 939                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 940                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 941                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 942                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 943                 if (clnt_st == RPC_SUCCESS) {
 944                         if ((ua == NULL) || (ua[0] == 0)) {
 945                                 /* address unknown */
 946                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 947                                 goto error;
 948                         }
 949                         address = uaddr2taddr(nconf, ua);
 950 #ifdef ND_DEBUG
 951                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 952                         if (!address)
 953                                 fprintf(stderr,
 954                                         "\tCouldn't resolve remote address!\n");
 955 #endif
 956                         xdr_free((xdrproc_t)xdr_wrapstring,
 957                             (char *)(void *)&ua);
 958
 959                         if (! address) {
 960                                 /* We don't know about your universal address */
 961                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 962                                 goto error;
 963                         }
 964                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
 965                             (char *)(void *)&servaddr);
 966                         __rpc_fixup_addr(address, &servaddr);
 967                         goto done;
 968                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
 969                         struct rpc_err rpcerr;
 970
 971                         clnt_geterr(client, &rpcerr);
 972                         if (rpcerr.re_vers.low > RPCBVERS4)
 973                                 goto error;  /* a new version, can't handle */
 974                 } else if (clnt_st != RPC_PROGUNAVAIL) {
 975                         /* Cant handle this error */
 976                         rpc_createerr.cf_stat = clnt_st;
 977                         clnt_geterr(client, &rpc_createerr.cf_error);
 978                         goto error;
 979                 }
 980         }
 981
 982 error:
 983         if (client) {
 984                 CLNT_DESTROY(client);
 985                 client = NULL;
 986         }
 987 done:
 988         if (nconf->nc_semantics != NC_TPI_CLTS) {
 989                 /* This client is the connectionless one */
 990                 if (client) {
 991                         CLNT_DESTROY(client);
 992                         client = NULL;
 993                 }
 994         }
 995         if (clpp) {
 996                 *clpp = client;
 997         } else if (client) {
 998                 CLNT_DESTROY(client);
 999         }
1000         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1001                 free(parms.r_addr);
1002         return (address);
1003 }
1004
1005
1006 /*
1007  * Find the mapped address for program, version.
1008  * Calls the rpcbind service remotely to do the lookup.
1009  * Uses the transport specified in nconf.
1010  * Returns FALSE (0) if no map exists, else returns 1.
1011  *
1012  * Assuming that the address is all properly allocated
1013  */
1014 bool_t
1015 rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
1016     struct netbuf *address, const char *host)
1017 {
1018         struct netbuf *na;
1019
1020         if ((na = __rpcb_findaddr_timed(program, version,
1021             (struct netconfig *) nconf, (char *) host,
1022             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1023                 return (FALSE);
1024
1025         if (na->len > address->maxlen) {
1026                 /* Too long address */
1027                 free(na->buf);
1028                 free(na);
1029                 rpc_createerr.cf_stat = RPC_FAILED;
1030                 return (FALSE);
1031         }
1032         memcpy(address->buf, na->buf, (size_t)na->len);
1033         address->len = na->len;
1034         free(na->buf);
1035         free(na);
1036         return (TRUE);
1037 }
1038
1039 /*
1040  * Get a copy of the current maps.
1041  * Calls the rpcbind service remotely to get the maps.
1042  *
1043  * It returns only a list of the services
1044  * It returns NULL on failure.
1045  */
1046 rpcblist *
1047 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1048 {
1049         rpcblist_ptr head = NULL;
1050         CLIENT *client;
1051         enum clnt_stat clnt_st;
1052         rpcvers_t vers = 0;
1053
1054         client = getclnthandle(host, nconf, NULL);
1055         if (client == NULL) {
1056                 return (head);
1057         }
1058         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1059             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1060             (char *)(void *)&head, tottimeout);
1061         if (clnt_st == RPC_SUCCESS)
1062                 goto done;
1063
1064         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1065             (clnt_st != RPC_PROGUNAVAIL)) {
1066                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1067                 clnt_geterr(client, &rpc_createerr.cf_error);
1068                 goto done;
1069         }
1070
1071         /* fall back to earlier version */
1072         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1073         if (vers == RPCBVERS4) {
1074                 vers = RPCBVERS;
1075                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1076                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1077                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1078                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1079                         goto done;
1080         }
1081         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1082         clnt_geterr(client, &rpc_createerr.cf_error);
1083
1084 done:
1085         CLNT_DESTROY(client);
1086         return (head);
1087 }
1088
1089 /*
1090  * rpcbinder remote-call-service interface.
1091  * This routine is used to call the rpcbind remote call service
1092  * which will look up a service program in the address maps, and then
1093  * remotely call that routine with the given parameters. This allows
1094  * programs to do a lookup and call in one step.
1095  *
1096  * nconf    -Netconfig structure
1097  * host     - Remote host name
1098  * proc     - Remote proc identifiers
1099  * xdrargs, xdrres;  XDR routines
1100  * argsp, resp - Argument and Result
1101  * tout     - Timeout value for this call
1102  * addr_ptr - Preallocated netbuf address
1103  */
1104 enum clnt_stat
1105 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog,
1106     rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp,
1107     xdrproc_t xdrres, caddr_t resp, struct timeval tout,
1108     const struct netbuf *addr_ptr)
1109 {
1110         CLIENT *client;
1111         enum clnt_stat stat;
1112         struct r_rpcb_rmtcallargs a;
1113         struct r_rpcb_rmtcallres r;
1114         rpcvers_t rpcb_vers;
1115
1116         stat = 0;
1117         client = getclnthandle(host, nconf, NULL);
1118         if (client == NULL) {
1119                 return (RPC_FAILED);
1120         }
1121         /*LINTED const castaway*/
1122         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1123         a.prog = prog;
1124         a.vers = vers;
1125         a.proc = proc;
1126         a.args.args_val = argsp;
1127         a.xdr_args = xdrargs;
1128         r.addr = NULL;
1129         r.results.results_val = resp;
1130         r.xdr_res = xdrres;
1131
1132         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1133                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1134                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1135                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1136                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1137                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1138                         struct netbuf *na;
1139                         /*LINTED const castaway*/
1140                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1141                         if (!na) {
1142                                 stat = RPC_N2AXLATEFAILURE;
1143                                 /*LINTED const castaway*/
1144                                 ((struct netbuf *) addr_ptr)->len = 0;
1145                                 goto error;
1146                         }
1147                         if (na->len > addr_ptr->maxlen) {
1148                                 /* Too long address */
1149                                 stat = RPC_FAILED; /* XXX A better error no */
1150                                 free(na->buf);
1151                                 free(na);
1152                                 /*LINTED const castaway*/
1153                                 ((struct netbuf *) addr_ptr)->len = 0;
1154                                 goto error;
1155                         }
1156                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1157                         /*LINTED const castaway*/
1158                         ((struct netbuf *)addr_ptr)->len = na->len;
1159                         free(na->buf);
1160                         free(na);
1161                         break;
1162                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1163                             (stat != RPC_PROGUNAVAIL)) {
1164                         goto error;
1165                 }
1166         }
1167 error:
1168         CLNT_DESTROY(client);
1169         if (r.addr)
1170                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1171         return (stat);
1172 }
1173
1174 /*
1175  * Gets the time on the remote host.
1176  * Returns 1 if succeeds else 0.
1177  */
1178 bool_t
1179 rpcb_gettime(const char *host, time_t *timep)
1180 {
1181         CLIENT *client = NULL;
1182         void *handle;
1183         struct netconfig *nconf;
1184         rpcvers_t vers;
1185         enum clnt_stat st;
1186
1187
1188         if ((host == NULL) || (host[0] == 0)) {
1189                 time(timep);
1190                 return (TRUE);
1191         }
1192
1193         if ((handle = __rpc_setconf("netpath")) == NULL) {
1194                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1195                 return (FALSE);
1196         }
1197         rpc_createerr.cf_stat = RPC_SUCCESS;
1198         while (client == NULL) {
1199                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1200                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1201                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1202                         break;
1203                 }
1204                 client = getclnthandle(host, nconf, NULL);
1205                 if (client)
1206                         break;
1207         }
1208         __rpc_endconf(handle);
1209         if (client == (CLIENT *) NULL) {
1210                 return (FALSE);
1211         }
1212
1213         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1214                 (xdrproc_t) xdr_void, NULL,
1215                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1216
1217         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1218                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1219                 if (vers == RPCBVERS4) {
1220                         /* fall back to earlier version */
1221                         vers = RPCBVERS;
1222                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1223                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1224                                 (xdrproc_t) xdr_void, NULL,
1225                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1226                                 tottimeout);
1227                 }
1228         }
1229         CLNT_DESTROY(client);
1230         return (st == RPC_SUCCESS? TRUE: FALSE);
1231 }
1232
1233 /*
1234  * Converts taddr to universal address.  This routine should never
1235  * really be called because local n2a libraries are always provided.
1236  */
1237 char *
1238 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1239 {
1240         CLIENT *client;
1241         char *uaddr = NULL;
1242
1243
1244         /* parameter checking */
1245         if (nconf == NULL) {
1246                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1247                 return (NULL);
1248         }
1249         if (taddr == NULL) {
1250                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1251                 return (NULL);
1252         }
1253         client = local_rpcb();
1254         if (! client) {
1255                 return (NULL);
1256         }
1257
1258         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1259             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1260             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1261         CLNT_DESTROY(client);
1262         return (uaddr);
1263 }
1264
1265 /*
1266  * Converts universal address to netbuf.  This routine should never
1267  * really be called because local n2a libraries are always provided.
1268  */
1269 struct netbuf *
1270 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1271 {
1272         CLIENT *client;
1273         struct netbuf *taddr;
1274
1275
1276         /* parameter checking */
1277         if (nconf == NULL) {
1278                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1279                 return (NULL);
1280         }
1281         if (uaddr == NULL) {
1282                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1283                 return (NULL);
1284         }
1285         client = local_rpcb();
1286         if (! client) {
1287                 return (NULL);
1288         }
1289
1290         taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1291         if (taddr == NULL) {
1292                 CLNT_DESTROY(client);
1293                 return (NULL);
1294         }
1295         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1296             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1297             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1298             tottimeout) != RPC_SUCCESS) {
1299                 free(taddr);
1300                 taddr = NULL;
1301         }
1302         CLNT_DESTROY(client);
1303         return (taddr);
1304 }