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                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 504                         mutex_unlock(&loopnconf_lock);
 505                         return (NULL);
 506                 }
 507                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 508                 /* loopnconf is never freed */
 509                 endnetconfig(nc_handle);
 510         }
 511         mutex_unlock(&loopnconf_lock);
 512         client = getclnthandle(hostname, loopnconf, NULL);
 513         return (client);
 514 }
 515
 516 /*
 517  * Set a mapping between program, version and address.
 518  * Calls the rpcbind service to do the mapping.
 519  *
 520  * nconf   - Network structure of transport
 521  * address - Services netconfig address
 522  */
 523 bool_t
 524 rpcb_set(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
 525     const struct netbuf *address)
 526 {
 527         CLIENT *client;
 528         bool_t rslt = FALSE;
 529         RPCB parms;
 530         char uidbuf[32];
 531
 532         /* parameter checking */
 533         if (nconf == NULL) {
 534                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 535                 return (FALSE);
 536         }
 537         if (address == NULL) {
 538                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 539                 return (FALSE);
 540         }
 541         client = local_rpcb();
 542         if (! client) {
 543                 return (FALSE);
 544         }
 545
 546         /* convert to universal */
 547         /*LINTED const castaway*/
 548         parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
 549                                    (struct netbuf *)address);
 550         if (!parms.r_addr) {
 551                 CLNT_DESTROY(client);
 552                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 553                 return (FALSE); /* no universal address */
 554         }
 555         parms.r_prog = program;
 556         parms.r_vers = version;
 557         parms.r_netid = nconf->nc_netid;
 558         /*
 559          * Though uid is not being used directly, we still send it for
 560          * completeness.  For non-unix platforms, perhaps some other
 561          * string or an empty string can be sent.
 562          */
 563         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 564         parms.r_owner = uidbuf;
 565
 566         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 567             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 568             (char *)(void *)&rslt, tottimeout);
 569
 570         CLNT_DESTROY(client);
 571         free(parms.r_addr);
 572         return (rslt);
 573 }
 574
 575 /*
 576  * Remove the mapping between program, version and netbuf address.
 577  * Calls the rpcbind service to do the un-mapping.
 578  * If netbuf is NULL, unset for all the transports, otherwise unset
 579  * only for the given transport.
 580  */
 581 bool_t
 582 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
 583 {
 584         CLIENT *client;
 585         bool_t rslt = FALSE;
 586         RPCB parms;
 587         char uidbuf[32];
 588
 589         client = local_rpcb();
 590         if (! client) {
 591                 return (FALSE);
 592         }
 593
 594         parms.r_prog = program;
 595         parms.r_vers = version;
 596         if (nconf)
 597                 parms.r_netid = nconf->nc_netid;
 598         else {
 599                 /*LINTED const castaway*/
 600                 parms.r_netid = (char *) &nullstring[0]; /* unsets  all */
 601         }
 602         /*LINTED const castaway*/
 603         parms.r_addr = (char *) &nullstring[0];
 604         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 605         parms.r_owner = uidbuf;
 606
 607         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 608             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 609             (char *)(void *)&rslt, tottimeout);
 610
 611         CLNT_DESTROY(client);
 612         return (rslt);
 613 }
 614
 615 /*
 616  * From the merged list, find the appropriate entry
 617  */
 618 static struct netbuf *
 619 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
 620 {
 621         struct netbuf *na = NULL;
 622         rpcb_entry_list_ptr sp;
 623         rpcb_entry *rmap;
 624
 625         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 626                 rmap = &sp->rpcb_entry_map;
 627                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 628                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 629                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 630                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 631                         na = uaddr2taddr(nconf, rmap->r_maddr);
 632 #ifdef ND_DEBUG
 633                         fprintf(stderr, "\tRemote address is [%s].\n",
 634                                 rmap->r_maddr);
 635                         if (!na)
 636                                 fprintf(stderr,
 637                                     "\tCouldn't resolve remote address!\n");
 638 #endif
 639                         break;
 640                 }
 641         }
 642         return (na);
 643 }
 644
 645 /*
 646  * Quick check to see if rpcbind is up.  Tries to connect over
 647  * local transport.
 648  */
 649 static bool_t
 650 __rpcbind_is_up(void)
 651 {
 652         struct netconfig *nconf;
 653         struct sockaddr_un sun;
 654         void *localhandle;
 655         int sock;
 656
 657         nconf = NULL;
 658         localhandle = setnetconfig();
 659         while ((nconf = getnetconfig(localhandle)) != NULL) {
 660                 if (nconf->nc_protofmly != NULL &&
 661                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 662                          break;
 663         }
 664         endnetconfig(localhandle);
 665
 666         if (nconf == NULL)
 667                 return (FALSE);
 668
 669         memset(&sun, 0, sizeof sun);
 670         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 671         if (sock < 0)
 672                 return (FALSE);
 673         sun.sun_family = AF_LOCAL;
 674         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 675         sun.sun_len = SUN_LEN(&sun);
 676
 677         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 678                 _close(sock);
 679                 return (FALSE);
 680         }
 681
 682         _close(sock);
 683         return (TRUE);
 684 }
 685
 686 /*
 687  * An internal function which optimizes rpcb_getaddr function.  It also
 688  * returns the client handle that it uses to contact the remote rpcbind.
 689  *
 690  * The algorithm used: If the transports is TCP or UDP, it first tries
 691  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 692  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 693  * that time, version 4 would be available on many machines on the network.
 694  * With this algorithm, we get performance as well as a plan for
 695  * obsoleting version 2.
 696  *
 697  * For all other transports, the algorithm remains as 4 and then 3.
 698  *
 699  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 700  * handle for COTS cases and hence in these cases we do not return the
 701  * client handle.  This code will change if t_connect() ever
 702  * starts working properly.  Also look under clnt_vc.c.
 703  */
 704 struct netbuf *
 705 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
 706     const struct netconfig *nconf, const char *host,
 707     CLIENT **clpp, struct timeval *tp)
 708 {
 709         static bool_t check_rpcbind = TRUE;
 710         CLIENT *client = NULL;
 711         RPCB parms;
 712         enum clnt_stat clnt_st;
 713         char *ua = NULL;
 714         rpcvers_t vers;
 715         struct netbuf *address = NULL;
 716         rpcvers_t start_vers = RPCBVERS4;
 717         struct netbuf servaddr;
 718
 719         /* parameter checking */
 720         if (nconf == NULL) {
 721                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 722                 return (NULL);
 723         }
 724
 725         parms.r_addr = NULL;
 726
 727         /*
 728          * Use default total timeout if no timeout is specified.
 729          */
 730         if (tp == NULL)
 731                 tp = &tottimeout;
 732
 733 #ifdef PORTMAP
 734         /* Try version 2 for TCP or UDP */
 735         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 736                 u_short port = 0;
 737                 struct netbuf remote;
 738                 rpcvers_t pmapvers = 2;
 739                 struct pmap pmapparms;
 740
 741                 /*
 742                  * Try UDP only - there are some portmappers out
 743                  * there that use UDP only.
 744                  */
 745                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 746                         struct netconfig *newnconf;
 747
 748                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 749                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 750                                 return (NULL);
 751                         }
 752                         client = getclnthandle(host, newnconf, &parms.r_addr);
 753                         freenetconfigent(newnconf);
 754                 } else {
 755                         client = getclnthandle(host, nconf, &parms.r_addr);
 756                 }
 757                 if (client == NULL)
 758                         return (NULL);
 759
 760                 /*
 761                  * Set version and retry timeout.
 762                  */
 763                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 764                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 765
 766                 pmapparms.pm_prog = program;
 767                 pmapparms.pm_vers = version;
 768                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 769                                         IPPROTO_UDP : IPPROTO_TCP;
 770                 pmapparms.pm_port = 0;  /* not needed */
 771                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 772                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 773                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 774                     *tp);
 775                 if (clnt_st != RPC_SUCCESS) {
 776                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 777                                 (clnt_st == RPC_PROGUNAVAIL))
 778                                 goto try_rpcbind; /* Try different versions */
 779                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 780                         clnt_geterr(client, &rpc_createerr.cf_error);
 781                         goto error;
 782                 } else if (port == 0) {
 783                         address = NULL;
 784                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 785                         goto error;
 786                 }
 787                 port = htons(port);
 788                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 789                 if (((address = (struct netbuf *)
 790                         malloc(sizeof (struct netbuf))) == NULL) ||
 791                     ((address->buf = (char *)
 792                         malloc(remote.len)) == NULL)) {
 793                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 794                         clnt_geterr(client, &rpc_createerr.cf_error);
 795                         free(address);
 796                         address = NULL;
 797                         goto error;
 798                 }
 799                 memcpy(address->buf, remote.buf, remote.len);
 800                 memcpy(&((char *)address->buf)[sizeof (short)],
 801                                 (char *)(void *)&port, sizeof (short));
 802                 address->len = address->maxlen = remote.len;
 803                 goto done;
 804         }
 805 #endif                          /* PORTMAP */
 806
 807 try_rpcbind:
 808         /*
 809          * Check if rpcbind is up.  This prevents needless delays when
 810          * accessing applications such as the keyserver while booting
 811          * disklessly.
 812          */
 813         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 814                 if (!__rpcbind_is_up()) {
 815                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 816                         rpc_createerr.cf_error.re_errno = 0;
 817                         goto error;
 818                 }
 819                 check_rpcbind = FALSE;
 820         }
 821
 822         /*
 823          * Now we try version 4 and then 3.
 824          * We also send the remote system the address we used to
 825          * contact it in case it can help to connect back with us
 826          */
 827         parms.r_prog = program;
 828         parms.r_vers = version;
 829         /*LINTED const castaway*/
 830         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 831                                                         /* just for xdring */
 832         parms.r_netid = nconf->nc_netid; /* not really needed */
 833
 834         /*
 835          * If a COTS transport is being used, try getting address via CLTS
 836          * transport.  This works only with version 4.
 837          */
 838         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 839                         nconf->nc_semantics == NC_TPI_COTS) {
 840
 841                 void *handle;
 842                 struct netconfig *nconf_clts;
 843                 rpcb_entry_list_ptr relp = NULL;
 844
 845                 if (client == NULL) {
 846                         /* This did not go through the above PORTMAP/TCP code */
 847                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 848                                 while ((nconf_clts = __rpc_getconf(handle))
 849                                         != NULL) {
 850                                         if (strcmp(nconf_clts->nc_protofmly,
 851                                                 nconf->nc_protofmly) != 0) {
 852                                                 continue;
 853                                         }
 854                                         client = getclnthandle(host, nconf_clts,
 855                                                         &parms.r_addr);
 856                                         break;
 857                                 }
 858                                 __rpc_endconf(handle);
 859                         }
 860                         if (client == NULL)
 861                                 goto regular_rpcbind;   /* Go the regular way */
 862                 } else {
 863                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 864                         vers = RPCBVERS4;
 865                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 866                 }
 867                 /*
 868                  * We also send the remote system the address we used to
 869                  * contact it in case it can help it connect back with us
 870                  */
 871                 if (parms.r_addr == NULL) {
 872                         /*LINTED const castaway*/
 873                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 874                 }
 875
 876                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 877
 878                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 879                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 880                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 881                     (char *)(void *)&relp, *tp);
 882                 if (clnt_st == RPC_SUCCESS) {
 883                         if ((address = got_entry(relp, nconf)) != NULL) {
 884                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 885                                     (char *)(void *)&relp);
 886                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 887                                         (char *)(void *)&servaddr);
 888                                 __rpc_fixup_addr(address, &servaddr);
 889                                 goto done;
 890                         }
 891                         /* Entry not found for this transport */
 892                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 893                             (char *)(void *)&relp);
 894                         /*
 895                          * XXX: should have perhaps returned with error but
 896                          * since the remote machine might not always be able
 897                          * to send the address on all transports, we try the
 898                          * regular way with regular_rpcbind
 899                          */
 900                         goto regular_rpcbind;
 901                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 902                         (clnt_st == RPC_PROGUNAVAIL)) {
 903                         start_vers = RPCBVERS;  /* Try version 3 now */
 904                         goto regular_rpcbind; /* Try different versions */
 905                 } else {
 906                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 907                         clnt_geterr(client, &rpc_createerr.cf_error);
 908                         goto error;
 909                 }
 910         }
 911
 912 regular_rpcbind:
 913
 914         /* Now the same transport is to be used to get the address */
 915         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 916                         (nconf->nc_semantics == NC_TPI_COTS))) {
 917                 /* A CLTS type of client - destroy it */
 918                 CLNT_DESTROY(client);
 919                 client = NULL;
 920         }
 921
 922         if (client == NULL) {
 923                 client = getclnthandle(host, nconf, &parms.r_addr);
 924                 if (client == NULL) {
 925                         goto error;
 926                 }
 927         }
 928         if (parms.r_addr == NULL) {
 929                 /*LINTED const castaway*/
 930                 parms.r_addr = (char *) &nullstring[0];
 931         }
 932
 933         /* First try from start_vers and then version 3 (RPCBVERS) */
 934
 935         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 936         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 937                 /* Set the version */
 938                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 939                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 940                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 941                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 942                 if (clnt_st == RPC_SUCCESS) {
 943                         if ((ua == NULL) || (ua[0] == 0)) {
 944                                 /* address unknown */
 945                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 946                                 goto error;
 947                         }
 948                         address = uaddr2taddr(nconf, ua);
 949 #ifdef ND_DEBUG
 950                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 951                         if (!address)
 952                                 fprintf(stderr,
 953                                         "\tCouldn't resolve remote address!\n");
 954 #endif
 955                         xdr_free((xdrproc_t)xdr_wrapstring,
 956                             (char *)(void *)&ua);
 957
 958                         if (! address) {
 959                                 /* We don't know about your universal address */
 960                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 961                                 goto error;
 962                         }
 963                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
 964                             (char *)(void *)&servaddr);
 965                         __rpc_fixup_addr(address, &servaddr);
 966                         goto done;
 967                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
 968                         struct rpc_err rpcerr;
 969
 970                         clnt_geterr(client, &rpcerr);
 971                         if (rpcerr.re_vers.low > RPCBVERS4)
 972                                 goto error;  /* a new version, can't handle */
 973                 } else if (clnt_st != RPC_PROGUNAVAIL) {
 974                         /* Cant handle this error */
 975                         rpc_createerr.cf_stat = clnt_st;
 976                         clnt_geterr(client, &rpc_createerr.cf_error);
 977                         goto error;
 978                 }
 979         }
 980
 981 error:
 982         if (client) {
 983                 CLNT_DESTROY(client);
 984                 client = NULL;
 985         }
 986 done:
 987         if (nconf->nc_semantics != NC_TPI_CLTS) {
 988                 /* This client is the connectionless one */
 989                 if (client) {
 990                         CLNT_DESTROY(client);
 991                         client = NULL;
 992                 }
 993         }
 994         if (clpp) {
 995                 *clpp = client;
 996         } else if (client) {
 997                 CLNT_DESTROY(client);
 998         }
 999         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1000                 free(parms.r_addr);
1001         return (address);
1002 }
1003
1004
1005 /*
1006  * Find the mapped address for program, version.
1007  * Calls the rpcbind service remotely to do the lookup.
1008  * Uses the transport specified in nconf.
1009  * Returns FALSE (0) if no map exists, else returns 1.
1010  *
1011  * Assuming that the address is all properly allocated
1012  */
1013 int
1014 rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
1015     struct netbuf *address, const char *host)
1016 {
1017         struct netbuf *na;
1018
1019         if ((na = __rpcb_findaddr_timed(program, version,
1020             (struct netconfig *) nconf, (char *) host,
1021             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1022                 return (FALSE);
1023
1024         if (na->len > address->maxlen) {
1025                 /* Too long address */
1026                 free(na->buf);
1027                 free(na);
1028                 rpc_createerr.cf_stat = RPC_FAILED;
1029                 return (FALSE);
1030         }
1031         memcpy(address->buf, na->buf, (size_t)na->len);
1032         address->len = na->len;
1033         free(na->buf);
1034         free(na);
1035         return (TRUE);
1036 }
1037
1038 /*
1039  * Get a copy of the current maps.
1040  * Calls the rpcbind service remotely to get the maps.
1041  *
1042  * It returns only a list of the services
1043  * It returns NULL on failure.
1044  */
1045 rpcblist *
1046 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1047 {
1048         rpcblist_ptr head = NULL;
1049         CLIENT *client;
1050         enum clnt_stat clnt_st;
1051         rpcvers_t vers = 0;
1052
1053         client = getclnthandle(host, nconf, NULL);
1054         if (client == NULL) {
1055                 return (head);
1056         }
1057         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1058             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1059             (char *)(void *)&head, tottimeout);
1060         if (clnt_st == RPC_SUCCESS)
1061                 goto done;
1062
1063         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1064             (clnt_st != RPC_PROGUNAVAIL)) {
1065                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1066                 clnt_geterr(client, &rpc_createerr.cf_error);
1067                 goto done;
1068         }
1069
1070         /* fall back to earlier version */
1071         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1072         if (vers == RPCBVERS4) {
1073                 vers = RPCBVERS;
1074                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1075                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1076                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1077                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1078                         goto done;
1079         }
1080         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1081         clnt_geterr(client, &rpc_createerr.cf_error);
1082
1083 done:
1084         CLNT_DESTROY(client);
1085         return (head);
1086 }
1087
1088 /*
1089  * rpcbinder remote-call-service interface.
1090  * This routine is used to call the rpcbind remote call service
1091  * which will look up a service program in the address maps, and then
1092  * remotely call that routine with the given parameters. This allows
1093  * programs to do a lookup and call in one step.
1094  *
1095  * nconf    -Netconfig structure
1096  * host     - Remote host name
1097  * proc     - Remote proc identifiers
1098  * xdrargs, xdrres;  XDR routines
1099  * argsp, resp - Argument and Result
1100  * tout     - Timeout value for this call
1101  * addr_ptr - Preallocated netbuf address
1102  */
1103 enum clnt_stat
1104 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog,
1105     rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp,
1106     xdrproc_t xdrres, caddr_t resp, struct timeval tout,
1107     const struct netbuf *addr_ptr)
1108 {
1109         CLIENT *client;
1110         enum clnt_stat stat;
1111         struct r_rpcb_rmtcallargs a;
1112         struct r_rpcb_rmtcallres r;
1113         rpcvers_t rpcb_vers;
1114
1115         stat = 0;
1116         client = getclnthandle(host, nconf, NULL);
1117         if (client == NULL) {
1118                 return (RPC_FAILED);
1119         }
1120         /*LINTED const castaway*/
1121         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1122         a.prog = prog;
1123         a.vers = vers;
1124         a.proc = proc;
1125         a.args.args_val = argsp;
1126         a.xdr_args = xdrargs;
1127         r.addr = NULL;
1128         r.results.results_val = resp;
1129         r.xdr_res = xdrres;
1130
1131         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1132                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1133                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1134                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1135                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1136                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1137                         struct netbuf *na;
1138                         /*LINTED const castaway*/
1139                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1140                         if (!na) {
1141                                 stat = RPC_N2AXLATEFAILURE;
1142                                 /*LINTED const castaway*/
1143                                 ((struct netbuf *) addr_ptr)->len = 0;
1144                                 goto error;
1145                         }
1146                         if (na->len > addr_ptr->maxlen) {
1147                                 /* Too long address */
1148                                 stat = RPC_FAILED; /* XXX A better error no */
1149                                 free(na->buf);
1150                                 free(na);
1151                                 /*LINTED const castaway*/
1152                                 ((struct netbuf *) addr_ptr)->len = 0;
1153                                 goto error;
1154                         }
1155                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1156                         /*LINTED const castaway*/
1157                         ((struct netbuf *)addr_ptr)->len = na->len;
1158                         free(na->buf);
1159                         free(na);
1160                         break;
1161                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1162                             (stat != RPC_PROGUNAVAIL)) {
1163                         goto error;
1164                 }
1165         }
1166 error:
1167         CLNT_DESTROY(client);
1168         if (r.addr)
1169                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1170         return (stat);
1171 }
1172
1173 /*
1174  * Gets the time on the remote host.
1175  * Returns 1 if succeeds else 0.
1176  */
1177 bool_t
1178 rpcb_gettime(const char *host, time_t *timep)
1179 {
1180         CLIENT *client = NULL;
1181         void *handle;
1182         struct netconfig *nconf;
1183         rpcvers_t vers;
1184         enum clnt_stat st;
1185
1186
1187         if ((host == NULL) || (host[0] == 0)) {
1188                 time(timep);
1189                 return (TRUE);
1190         }
1191
1192         if ((handle = __rpc_setconf("netpath")) == NULL) {
1193                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1194                 return (FALSE);
1195         }
1196         rpc_createerr.cf_stat = RPC_SUCCESS;
1197         while (client == NULL) {
1198                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1199                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1200                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1201                         break;
1202                 }
1203                 client = getclnthandle(host, nconf, NULL);
1204                 if (client)
1205                         break;
1206         }
1207         __rpc_endconf(handle);
1208         if (client == (CLIENT *) NULL) {
1209                 return (FALSE);
1210         }
1211
1212         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1213                 (xdrproc_t) xdr_void, NULL,
1214                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1215
1216         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1217                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1218                 if (vers == RPCBVERS4) {
1219                         /* fall back to earlier version */
1220                         vers = RPCBVERS;
1221                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1222                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1223                                 (xdrproc_t) xdr_void, NULL,
1224                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1225                                 tottimeout);
1226                 }
1227         }
1228         CLNT_DESTROY(client);
1229         return (st == RPC_SUCCESS? TRUE: FALSE);
1230 }
1231
1232 /*
1233  * Converts taddr to universal address.  This routine should never
1234  * really be called because local n2a libraries are always provided.
1235  */
1236 char *
1237 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1238 {
1239         CLIENT *client;
1240         char *uaddr = NULL;
1241
1242
1243         /* parameter checking */
1244         if (nconf == NULL) {
1245                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1246                 return (NULL);
1247         }
1248         if (taddr == NULL) {
1249                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1250                 return (NULL);
1251         }
1252         client = local_rpcb();
1253         if (! client) {
1254                 return (NULL);
1255         }
1256
1257         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1258             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1259             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1260         CLNT_DESTROY(client);
1261         return (uaddr);
1262 }
1263
1264 /*
1265  * Converts universal address to netbuf.  This routine should never
1266  * really be called because local n2a libraries are always provided.
1267  */
1268 struct netbuf *
1269 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1270 {
1271         CLIENT *client;
1272         struct netbuf *taddr;
1273
1274
1275         /* parameter checking */
1276         if (nconf == NULL) {
1277                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1278                 return (NULL);
1279         }
1280         if (uaddr == NULL) {
1281                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1282                 return (NULL);
1283         }
1284         client = local_rpcb();
1285         if (! client) {
1286                 return (NULL);
1287         }
1288
1289         taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1290         if (taddr == NULL) {
1291                 CLNT_DESTROY(client);
1292                 return (NULL);
1293         }
1294         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1295             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1296             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1297             tottimeout) != RPC_SUCCESS) {
1298                 free(taddr);
1299                 taddr = NULL;
1300         }
1301         CLNT_DESTROY(client);
1302         return (taddr);
1303 }