lib/libc/rpc/rpcb_clnt.c

   1 /*
   2  * The contents of this file are subject to the Sun Standards
   3  * License Version 1.0 the (the "License";) You may not use
   4  * this file except in compliance with the License.  You may
   5  * obtain a copy of the License at lib/libc/rpc/LICENSE
   6  *
   7  * Software distributed under the License is distributed on
   8  * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
   9  * express or implied.  See the License for the specific
  10  * language governing rights and limitations under the License.
  11  *
  12  * The Original Code is Copyright 1998 by Sun Microsystems, Inc
  13  *
  14  * The Initial Developer of the Original Code is:  Sun
  15  * Microsystems, Inc.
  16  *
  17  * All Rights Reserved.
  18  *
  19  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  20  * unrestricted use provided that this legend is included on all tape
  21  * media and as a part of the software program in whole or part.  Users
  22  * may copy or modify Sun RPC without charge, but are not authorized
  23  * to license or distribute it to anyone else except as part of a product or
  24  * program developed by the user.
  25  *
  26  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  27  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  29  *
  30  * Sun RPC is provided with no support and without any obligation on the
  31  * part of Sun Microsystems, Inc. to assist in its use, correction,
  32  * modification or enhancement.
  33  *
  34  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  35  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  36  * OR ANY PART THEREOF.
  37  *
  38  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  39  * or profits or other special, indirect and consequential damages, even if
  40  * Sun has been advised of the possibility of such damages.
  41  *
  42  * Sun Microsystems, Inc.
  43  * 2550 Garcia Avenue
  44  * Mountain View, California  94043
  45  * @(#)rpcb_clnt.c      1.27    94/04/24 SMI; 1.30 89/06/21 Copyr 1988 Sun Micro
  46  * $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $
  47  * $FreeBSD: src/lib/libc/rpc/rpcb_clnt.c,v 1.17 2007/09/20 22:35:24 matteo Exp $
  48  */
  49 /*
  50  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  51  */
  52
  53 /*
  54  * rpcb_clnt.c
  55  * interface to rpcbind rpc service.
  56  *
  57  * Copyright (C) 1988, Sun Microsystems, Inc.
  58  */
  59
  60 #include "namespace.h"
  61 #include "reentrant.h"
  62 #include <sys/types.h>
  63 #include <sys/socket.h>
  64 #include <sys/un.h>
  65 #include <sys/utsname.h>
  66 #include <rpc/rpc.h>
  67 #include <rpc/rpcb_prot.h>
  68 #include <rpc/nettype.h>
  69 #include <netconfig.h>
  70 #ifdef PORTMAP
  71 #include <netinet/in.h>         /* FOR IPPROTO_TCP/UDP definitions */
  72 #include <rpc/pmap_prot.h>
  73 #endif                          /* PORTMAP */
  74 #include <stdio.h>
  75 #include <errno.h>
  76 #include <stdlib.h>
  77 #include <string.h>
  78 #include <unistd.h>
  79 #include <netdb.h>
  80 #include <syslog.h>
  81 #include "un-namespace.h"
  82
  83 #include "rpc_com.h"
  84 #include "mt_misc.h"
  85
  86 static struct timeval tottimeout = { 60, 0 };
  87 static const struct timeval rmttimeout = { 3, 0 };
  88 static struct timeval rpcbrmttime = { 15, 0 };
  89
  90 extern bool_t xdr_wrapstring(XDR *, char **);
  91
  92 static const char nullstring[] = "\000";
  93
  94 #define CACHESIZE 6
  95
  96 struct address_cache {
  97         char *ac_host;
  98         char *ac_netid;
  99         char *ac_uaddr;
 100         struct netbuf *ac_taddr;
 101         struct address_cache *ac_next;
 102 };
 103
 104 static struct address_cache *front;
 105 static int cachesize;
 106
 107 #define CLCR_GET_RPCB_TIMEOUT   1
 108 #define CLCR_SET_RPCB_TIMEOUT   2
 109
 110
 111 extern int __rpc_lowvers;
 112
 113 static struct address_cache *check_cache(const char *, const char *);
 114 static void delete_cache(struct netbuf *);
 115 static void add_cache(const char *, const char *, struct netbuf *, char *);
 116 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
 117 static CLIENT *local_rpcb(void);
 118 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
 119
 120 /*
 121  * This routine adjusts the timeout used for calls to the remote rpcbind.
 122  * Also, this routine can be used to set the use of portmapper version 2
 123  * only when doing rpc_broadcasts
 124  * These are private routines that may not be provided in future releases.
 125  */
 126 bool_t
 127 __rpc_control(int request, void *info)
 128 {
 129         switch (request) {
 130         case CLCR_GET_RPCB_TIMEOUT:
 131                 *(struct timeval *)info = tottimeout;
 132                 break;
 133         case CLCR_SET_RPCB_TIMEOUT:
 134                 tottimeout = *(struct timeval *)info;
 135                 break;
 136         case CLCR_SET_LOWVERS:
 137                 __rpc_lowvers = *(int *)info;
 138                 break;
 139         case CLCR_GET_LOWVERS:
 140                 *(int *)info = __rpc_lowvers;
 141                 break;
 142         default:
 143                 return (FALSE);
 144         }
 145         return (TRUE);
 146 }
 147
 148 /*
 149  *      It might seem that a reader/writer lock would be more reasonable here.
 150  *      However because getclnthandle(), the only user of the cache functions,
 151  *      may do a delete_cache() operation if a check_cache() fails to return an
 152  *      address useful to clnt_tli_create(), we may as well use a mutex.
 153  */
 154 /*
 155  * As it turns out, if the cache lock is *not* a reader/writer lock, we will
 156  * block all clnt_create's if we are trying to connect to a host that's down,
 157  * since the lock will be held all during that time.
 158  */
 159
 160 /*
 161  * The routines check_cache(), add_cache(), delete_cache() manage the
 162  * cache of rpcbind addresses for (host, netid).
 163  */
 164
 165 static struct address_cache *
 166 check_cache(const char *host, const char *netid)
 167 {
 168         struct address_cache *cptr;
 169
 170         /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 171
 172         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 173                 if (!strcmp(cptr->ac_host, host) &&
 174                     !strcmp(cptr->ac_netid, netid)) {
 175 #ifdef ND_DEBUG
 176                         fprintf(stderr, "Found cache entry for %s: %s\n",
 177                                 host, netid);
 178 #endif
 179                         return (cptr);
 180                 }
 181         }
 182         return ((struct address_cache *) NULL);
 183 }
 184
 185 static void
 186 delete_cache(struct netbuf *addr)
 187 {
 188         struct address_cache *cptr, *prevptr = NULL;
 189
 190         /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 191         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 192                 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
 193                         free(cptr->ac_host);
 194                         free(cptr->ac_netid);
 195                         free(cptr->ac_taddr->buf);
 196                         free(cptr->ac_taddr);
 197                         if (cptr->ac_uaddr)
 198                                 free(cptr->ac_uaddr);
 199                         if (prevptr)
 200                                 prevptr->ac_next = cptr->ac_next;
 201                         else
 202                                 front = cptr->ac_next;
 203                         free(cptr);
 204                         cachesize--;
 205                         break;
 206                 }
 207                 prevptr = cptr;
 208         }
 209 }
 210
 211 static void
 212 add_cache(const char *host, const char *netid, struct netbuf *taddr,
 213           char *uaddr)
 214 {
 215         struct address_cache  *ad_cache, *cptr, *prevptr;
 216
 217         ad_cache = (struct address_cache *)
 218                         malloc(sizeof (struct address_cache));
 219         if (!ad_cache) {
 220                 return;
 221         }
 222         ad_cache->ac_host = strdup(host);
 223         ad_cache->ac_netid = strdup(netid);
 224         ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
 225         ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
 226         if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
 227                 (uaddr && !ad_cache->ac_uaddr)) {
 228                 goto out;
 229         }
 230         ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
 231         ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
 232         if (ad_cache->ac_taddr->buf == NULL) {
 233 out:
 234                 if (ad_cache->ac_host)
 235                         free(ad_cache->ac_host);
 236                 if (ad_cache->ac_netid)
 237                         free(ad_cache->ac_netid);
 238                 if (ad_cache->ac_uaddr)
 239                         free(ad_cache->ac_uaddr);
 240                 if (ad_cache->ac_taddr)
 241                         free(ad_cache->ac_taddr);
 242                 free(ad_cache);
 243                 return;
 244         }
 245         memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
 246 #ifdef ND_DEBUG
 247         fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
 248 #endif
 249
 250 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  cptr */
 251
 252         rwlock_wrlock(&rpcbaddr_cache_lock);
 253         if (cachesize < CACHESIZE) {
 254                 ad_cache->ac_next = front;
 255                 front = ad_cache;
 256                 cachesize++;
 257         } else {
 258                 /* Free the last entry */
 259                 cptr = front;
 260                 prevptr = NULL;
 261                 while (cptr->ac_next) {
 262                         prevptr = cptr;
 263                         cptr = cptr->ac_next;
 264                 }
 265
 266 #ifdef ND_DEBUG
 267                 fprintf(stderr, "Deleted from cache: %s : %s\n",
 268                         cptr->ac_host, cptr->ac_netid);
 269 #endif
 270                 free(cptr->ac_host);
 271                 free(cptr->ac_netid);
 272                 free(cptr->ac_taddr->buf);
 273                 free(cptr->ac_taddr);
 274                 if (cptr->ac_uaddr)
 275                         free(cptr->ac_uaddr);
 276
 277                 if (prevptr) {
 278                         prevptr->ac_next = NULL;
 279                         ad_cache->ac_next = front;
 280                         front = ad_cache;
 281                 } else {
 282                         front = ad_cache;
 283                         ad_cache->ac_next = NULL;
 284                 }
 285                 free(cptr);
 286         }
 287         rwlock_unlock(&rpcbaddr_cache_lock);
 288 }
 289
 290 /*
 291  * This routine will return a client handle that is connected to the
 292  * rpcbind. If targaddr is non-NULL, the "universal address" of the
 293  * host will be stored in *targaddr; the caller is responsible for
 294  * freeing this string.
 295  * On error, returns NULL and free's everything.
 296  */
 297 static CLIENT *
 298 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
 299 {
 300         CLIENT *client;
 301         struct netbuf *addr, taddr;
 302         struct netbuf addr_to_delete;
 303         struct __rpc_sockinfo si;
 304         struct addrinfo hints, *res, *tres;
 305         struct address_cache *ad_cache;
 306         char *tmpaddr;
 307
 308 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  ad_cache */
 309
 310         /* Get the address of the rpcbind.  Check cache first */
 311         client = NULL;
 312         addr_to_delete.len = 0;
 313         rwlock_rdlock(&rpcbaddr_cache_lock);
 314         ad_cache = NULL;
 315         if (host != NULL)
 316                 ad_cache = check_cache(host, nconf->nc_netid);
 317         if (ad_cache != NULL) {
 318                 addr = ad_cache->ac_taddr;
 319                 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
 320                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 321                 if (client != NULL) {
 322                         if (targaddr)
 323                                 *targaddr = strdup(ad_cache->ac_uaddr);
 324                         rwlock_unlock(&rpcbaddr_cache_lock);
 325                         return (client);
 326                 }
 327                 addr_to_delete.len = addr->len;
 328                 addr_to_delete.buf = (char *)malloc(addr->len);
 329                 if (addr_to_delete.buf == NULL) {
 330                         addr_to_delete.len = 0;
 331                 } else {
 332                         memcpy(addr_to_delete.buf, addr->buf, addr->len);
 333                 }
 334         }
 335         rwlock_unlock(&rpcbaddr_cache_lock);
 336         if (addr_to_delete.len != 0) {
 337                 /*
 338                  * Assume this may be due to cache data being
 339                  *  outdated
 340                  */
 341                 rwlock_wrlock(&rpcbaddr_cache_lock);
 342                 delete_cache(&addr_to_delete);
 343                 rwlock_unlock(&rpcbaddr_cache_lock);
 344                 free(addr_to_delete.buf);
 345         }
 346         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 347                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 348                 return NULL;
 349         }
 350
 351         memset(&hints, 0, sizeof hints);
 352         hints.ai_family = si.si_af;
 353         hints.ai_socktype = si.si_socktype;
 354         hints.ai_protocol = si.si_proto;
 355
 356 #ifdef CLNT_DEBUG
 357         printf("trying netid %s family %d proto %d socktype %d\n",
 358             nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
 359 #endif
 360
 361         if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 362                 client = local_rpcb();
 363                 if (! client) {
 364 #ifdef ND_DEBUG
 365                         clnt_pcreateerror("rpcbind clnt interface");
 366 #endif
 367                         return (NULL);
 368                 } else {
 369                         struct sockaddr_un sun;
 370                         if (targaddr) {
 371                             *targaddr = malloc(sizeof(sun.sun_path));
 372                             if (*targaddr == NULL) {
 373                                 CLNT_DESTROY(client);
 374                                 return (NULL);
 375                             }
 376                             strncpy(*targaddr, _PATH_RPCBINDSOCK,
 377                                 sizeof(sun.sun_path));
 378                         }
 379                         return (client);
 380                 }
 381         } else {
 382                 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
 383                         rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
 384                         return NULL;
 385                 }
 386         }
 387
 388         for (tres = res; tres != NULL; tres = tres->ai_next) {
 389                 taddr.buf = tres->ai_addr;
 390                 taddr.len = taddr.maxlen = tres->ai_addrlen;
 391
 392 #ifdef ND_DEBUG
 393                 {
 394                         char *ua;
 395
 396                         ua = taddr2uaddr(nconf, &taddr);
 397                         fprintf(stderr, "Got it [%s]\n", ua);
 398                         free(ua);
 399                 }
 400 #endif
 401
 402 #ifdef ND_DEBUG
 403                 {
 404                         int i;
 405
 406                         fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
 407                                 taddr.len, taddr.maxlen);
 408                         fprintf(stderr, "\tAddress is ");
 409                         for (i = 0; i < taddr.len; i++)
 410                                 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
 411                         fprintf(stderr, "\n");
 412                 }
 413 #endif
 414                 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
 415                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 416 #ifdef ND_DEBUG
 417                 if (! client) {
 418                         clnt_pcreateerror("rpcbind clnt interface");
 419                 }
 420 #endif
 421
 422                 if (client) {
 423                         tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
 424                         add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
 425                         if (targaddr)
 426                                 *targaddr = tmpaddr;
 427                         break;
 428                 }
 429         }
 430         if (res)
 431                 freeaddrinfo(res);
 432         return (client);
 433 }
 434
 435 /* XXX */
 436 #define IN4_LOCALHOST_STRING    "127.0.0.1"
 437 #define IN6_LOCALHOST_STRING    "::1"
 438
 439 /*
 440  * This routine will return a client handle that is connected to the local
 441  * rpcbind. Returns NULL on error and free's everything.
 442  */
 443 static CLIENT *
 444 local_rpcb(void)
 445 {
 446         CLIENT *client;
 447         static struct netconfig *loopnconf;
 448         static char *hostname;
 449         int sock;
 450         size_t tsize;
 451         struct netbuf nbuf;
 452         struct sockaddr_un sun;
 453
 454         /*
 455          * Try connecting to the local rpcbind through a local socket
 456          * first. If this doesn't work, try all transports defined in
 457          * the netconfig file.
 458          */
 459         memset(&sun, 0, sizeof sun);
 460         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 461         if (sock < 0)
 462                 goto try_nconf;
 463         sun.sun_family = AF_LOCAL;
 464         strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 465         nbuf.len = sun.sun_len = SUN_LEN(&sun);
 466         nbuf.maxlen = sizeof (struct sockaddr_un);
 467         nbuf.buf = &sun;
 468
 469         tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
 470         client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
 471             (rpcvers_t)RPCBVERS, tsize, tsize);
 472
 473         if (client != NULL) {
 474                 /* Mark the socket to be closed in destructor */
 475                 CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
 476                 return client;
 477         }
 478
 479         /* Nobody needs this socket anymore; free the descriptor. */
 480         _close(sock);
 481
 482 try_nconf:
 483
 484 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
 485         mutex_lock(&loopnconf_lock);
 486         if (loopnconf == NULL) {
 487                 struct netconfig *nconf, *tmpnconf = NULL;
 488                 void *nc_handle;
 489                 int fd;
 490
 491                 nc_handle = setnetconfig();
 492                 if (nc_handle == NULL) {
 493                         /* fails to open netconfig file */
 494                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 495                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 496                         mutex_unlock(&loopnconf_lock);
 497                         return (NULL);
 498                 }
 499                 while ((nconf = getnetconfig(nc_handle)) != NULL) {
 500 #ifdef INET6
 501                         if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
 502 #else
 503                         if ((
 504 #endif
 505                              strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
 506                             (nconf->nc_semantics == NC_TPI_COTS ||
 507                              nconf->nc_semantics == NC_TPI_COTS_ORD)) {
 508                                 fd = __rpc_nconf2fd(nconf);
 509                                 /*
 510                                  * Can't create a socket, assume that
 511                                  * this family isn't configured in the kernel.
 512                                  */
 513                                 if (fd < 0)
 514                                         continue;
 515                                 _close(fd);
 516                                 tmpnconf = nconf;
 517                                 if (!strcmp(nconf->nc_protofmly, NC_INET))
 518                                         hostname = IN4_LOCALHOST_STRING;
 519                                 else
 520                                         hostname = IN6_LOCALHOST_STRING;
 521                         }
 522                 }
 523                 if (tmpnconf == NULL) {
 524                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 525                         mutex_unlock(&loopnconf_lock);
 526                         return (NULL);
 527                 }
 528                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 529                 /* loopnconf is never freed */
 530                 endnetconfig(nc_handle);
 531         }
 532         mutex_unlock(&loopnconf_lock);
 533         client = getclnthandle(hostname, loopnconf, NULL);
 534         return (client);
 535 }
 536
 537 /*
 538  * Set a mapping between program, version and address.
 539  * Calls the rpcbind service to do the mapping.
 540  */
 541 bool_t
 542 rpcb_set(rpcprog_t program, rpcvers_t version,
 543          const struct netconfig *nconf, /* Network structure of transport */
 544          const struct netbuf *address)  /* Services netconfig address */
 545 {
 546         CLIENT *client;
 547         bool_t rslt = FALSE;
 548         RPCB parms;
 549         char uidbuf[32];
 550
 551         /* parameter checking */
 552         if (nconf == NULL) {
 553                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 554                 return (FALSE);
 555         }
 556         if (address == NULL) {
 557                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 558                 return (FALSE);
 559         }
 560         client = local_rpcb();
 561         if (! client) {
 562                 return (FALSE);
 563         }
 564
 565         /* convert to universal */
 566         /*LINTED const castaway*/
 567         parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
 568                                    (struct netbuf *)address);
 569         if (!parms.r_addr) {
 570                 CLNT_DESTROY(client);
 571                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 572                 return (FALSE); /* no universal address */
 573         }
 574         parms.r_prog = program;
 575         parms.r_vers = version;
 576         parms.r_netid = nconf->nc_netid;
 577         /*
 578          * Though uid is not being used directly, we still send it for
 579          * completeness.  For non-unix platforms, perhaps some other
 580          * string or an empty string can be sent.
 581          */
 582         snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 583         parms.r_owner = uidbuf;
 584
 585         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 586             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 587             (char *)(void *)&rslt, tottimeout);
 588
 589         CLNT_DESTROY(client);
 590         free(parms.r_addr);
 591         return (rslt);
 592 }
 593
 594 /*
 595  * Remove the mapping between program, version and netbuf address.
 596  * Calls the rpcbind service to do the un-mapping.
 597  * If netbuf is NULL, unset for all the transports, otherwise unset
 598  * only for the given transport.
 599  */
 600 bool_t
 601 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
 602 {
 603         CLIENT *client;
 604         bool_t rslt = FALSE;
 605         RPCB parms;
 606         char uidbuf[32];
 607
 608         client = local_rpcb();
 609         if (! client) {
 610                 return (FALSE);
 611         }
 612
 613         parms.r_prog = program;
 614         parms.r_vers = version;
 615         if (nconf)
 616                 parms.r_netid = nconf->nc_netid;
 617         else {
 618                 /*LINTED const castaway*/
 619                 parms.r_netid = (char *) &nullstring[0]; /* unsets  all */
 620         }
 621         /*LINTED const castaway*/
 622         parms.r_addr = (char *) &nullstring[0];
 623         snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 624         parms.r_owner = uidbuf;
 625
 626         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 627             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 628             (char *)(void *)&rslt, tottimeout);
 629
 630         CLNT_DESTROY(client);
 631         return (rslt);
 632 }
 633
 634 /*
 635  * From the merged list, find the appropriate entry
 636  */
 637 static struct netbuf *
 638 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
 639 {
 640         struct netbuf *na = NULL;
 641         rpcb_entry_list_ptr sp;
 642         rpcb_entry *rmap;
 643
 644         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 645                 rmap = &sp->rpcb_entry_map;
 646                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 647                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 648                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 649                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 650                         na = uaddr2taddr(nconf, rmap->r_maddr);
 651 #ifdef ND_DEBUG
 652                         fprintf(stderr, "\tRemote address is [%s].\n",
 653                                 rmap->r_maddr);
 654                         if (!na)
 655                                 fprintf(stderr,
 656                                     "\tCouldn't resolve remote address!\n");
 657 #endif
 658                         break;
 659                 }
 660         }
 661         return (na);
 662 }
 663
 664 /*
 665  * Quick check to see if rpcbind is up.  Tries to connect over
 666  * local transport.
 667  */
 668 static bool_t
 669 __rpcbind_is_up(void)
 670 {
 671         struct netconfig *nconf;
 672         struct sockaddr_un sun;
 673         void *localhandle;
 674         int sock;
 675
 676         nconf = NULL;
 677         localhandle = setnetconfig();
 678         while ((nconf = getnetconfig(localhandle)) != NULL) {
 679                 if (nconf->nc_protofmly != NULL &&
 680                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 681                          break;
 682         }
 683         if (nconf == NULL)
 684                 return (FALSE);
 685
 686         endnetconfig(localhandle);
 687
 688         memset(&sun, 0, sizeof sun);
 689         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 690         if (sock < 0)
 691                 return (FALSE);
 692         sun.sun_family = AF_LOCAL;
 693         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 694         sun.sun_len = SUN_LEN(&sun);
 695
 696         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 697                 _close(sock);
 698                 return (FALSE);
 699         }
 700
 701         _close(sock);
 702         return (TRUE);
 703 }
 704
 705 /*
 706  * An internal function which optimizes rpcb_getaddr function.  It also
 707  * returns the client handle that it uses to contact the remote rpcbind.
 708  *
 709  * The algorithm used: If the transports is TCP or UDP, it first tries
 710  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 711  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 712  * that time, version 4 would be available on many machines on the network.
 713  * With this algorithm, we get performance as well as a plan for
 714  * obsoleting version 2.
 715  *
 716  * For all other transports, the algorithm remains as 4 and then 3.
 717  *
 718  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 719  * handle for COTS cases and hence in these cases we do not return the
 720  * client handle.  This code will change if t_connect() ever
 721  * starts working properly.  Also look under clnt_vc.c.
 722  */
 723 struct netbuf *
 724 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
 725                       const struct netconfig *nconf, const char *host,
 726                       CLIENT **clpp, struct timeval *tp)
 727 {
 728         static bool_t check_rpcbind = TRUE;
 729         CLIENT *client = NULL;
 730         RPCB parms;
 731         enum clnt_stat clnt_st;
 732         char *ua = NULL;
 733         rpcvers_t vers;
 734         struct netbuf *address = NULL;
 735         rpcvers_t start_vers = RPCBVERS4;
 736         struct netbuf servaddr;
 737
 738         /* parameter checking */
 739         if (nconf == NULL) {
 740                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 741                 return (NULL);
 742         }
 743
 744         parms.r_addr = NULL;
 745
 746         /*
 747          * Use default total timeout if no timeout is specified.
 748          */
 749         if (tp == NULL)
 750                 tp = &tottimeout;
 751
 752 #ifdef PORTMAP
 753         /* Try version 2 for TCP or UDP */
 754         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 755                 u_short port = 0;
 756                 struct netbuf remote;
 757                 rpcvers_t pmapvers = 2;
 758                 struct pmap pmapparms;
 759
 760                 /*
 761                  * Try UDP only - there are some portmappers out
 762                  * there that use UDP only.
 763                  */
 764                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 765                         struct netconfig *newnconf;
 766
 767                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 768                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 769                                 return (NULL);
 770                         }
 771                         client = getclnthandle(host, newnconf, &parms.r_addr);
 772                         freenetconfigent(newnconf);
 773                 } else {
 774                         client = getclnthandle(host, nconf, &parms.r_addr);
 775                 }
 776                 if (client == NULL)
 777                         return (NULL);
 778
 779                 /*
 780                  * Set version and retry timeout.
 781                  */
 782                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 783                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 784
 785                 pmapparms.pm_prog = program;
 786                 pmapparms.pm_vers = version;
 787                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 788                                         IPPROTO_UDP : IPPROTO_TCP;
 789                 pmapparms.pm_port = 0;  /* not needed */
 790                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 791                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 792                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 793                     *tp);
 794                 if (clnt_st != RPC_SUCCESS) {
 795                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 796                                 (clnt_st == RPC_PROGUNAVAIL))
 797                                 goto try_rpcbind; /* Try different versions */
 798                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 799                         clnt_geterr(client, &rpc_createerr.cf_error);
 800                         goto error;
 801                 } else if (port == 0) {
 802                         address = NULL;
 803                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 804                         goto error;
 805                 }
 806                 port = htons(port);
 807                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 808                 if (((address = (struct netbuf *)
 809                         malloc(sizeof (struct netbuf))) == NULL) ||
 810                     ((address->buf = (char *)
 811                         malloc(remote.len)) == NULL)) {
 812                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 813                         clnt_geterr(client, &rpc_createerr.cf_error);
 814                         if (address) {
 815                                 free(address);
 816                                 address = NULL;
 817                         }
 818                         goto error;
 819                 }
 820                 memcpy(address->buf, remote.buf, remote.len);
 821                 memcpy(&((char *)address->buf)[sizeof (short)],
 822                                 (char *)(void *)&port, sizeof (short));
 823                 address->len = address->maxlen = remote.len;
 824                 goto done;
 825         }
 826 #endif                          /* PORTMAP */
 827
 828 try_rpcbind:
 829         /*
 830          * Check if rpcbind is up.  This prevents needless delays when
 831          * accessing applications such as the keyserver while booting
 832          * disklessly.
 833          */
 834         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 835                 if (!__rpcbind_is_up()) {
 836                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 837                         rpc_createerr.cf_error.re_errno = 0;
 838                         goto error;
 839                 }
 840                 check_rpcbind = FALSE;
 841         }
 842
 843         /*
 844          * Now we try version 4 and then 3.
 845          * We also send the remote system the address we used to
 846          * contact it in case it can help to connect back with us
 847          */
 848         parms.r_prog = program;
 849         parms.r_vers = version;
 850         /*LINTED const castaway*/
 851         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 852                                                         /* just for xdring */
 853         parms.r_netid = nconf->nc_netid; /* not really needed */
 854
 855         /*
 856          * If a COTS transport is being used, try getting address via CLTS
 857          * transport.  This works only with version 4.
 858          */
 859         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 860                         nconf->nc_semantics == NC_TPI_COTS) {
 861
 862                 void *handle;
 863                 struct netconfig *nconf_clts;
 864                 rpcb_entry_list_ptr relp = NULL;
 865
 866                 if (client == NULL) {
 867                         /* This did not go through the above PORTMAP/TCP code */
 868                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 869                                 while ((nconf_clts = __rpc_getconf(handle))
 870                                         != NULL) {
 871                                         if (strcmp(nconf_clts->nc_protofmly,
 872                                                 nconf->nc_protofmly) != 0) {
 873                                                 continue;
 874                                         }
 875                                         client = getclnthandle(host, nconf_clts,
 876                                                         &parms.r_addr);
 877                                         break;
 878                                 }
 879                                 __rpc_endconf(handle);
 880                         }
 881                         if (client == NULL)
 882                                 goto regular_rpcbind;   /* Go the regular way */
 883                 } else {
 884                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 885                         vers = RPCBVERS4;
 886                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 887                 }
 888                 /*
 889                  * We also send the remote system the address we used to
 890                  * contact it in case it can help it connect back with us
 891                  */
 892                 if (parms.r_addr == NULL) {
 893                         /*LINTED const castaway*/
 894                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 895                 }
 896
 897                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 898
 899                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 900                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 901                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 902                     (char *)(void *)&relp, *tp);
 903                 if (clnt_st == RPC_SUCCESS) {
 904                         if ((address = got_entry(relp, nconf)) != NULL) {
 905                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 906                                     (char *)(void *)&relp);
 907                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 908                                         (char *)(void *)&servaddr);
 909                                 __rpc_fixup_addr(address, &servaddr);
 910                                 goto done;
 911                         }
 912                         /* Entry not found for this transport */
 913                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 914                             (char *)(void *)&relp);
 915                         /*
 916                          * XXX: should have perhaps returned with error but
 917                          * since the remote machine might not always be able
 918                          * to send the address on all transports, we try the
 919                          * regular way with regular_rpcbind
 920                          */
 921                         goto regular_rpcbind;
 922                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 923                         (clnt_st == RPC_PROGUNAVAIL)) {
 924                         start_vers = RPCBVERS;  /* Try version 3 now */
 925                         goto regular_rpcbind; /* Try different versions */
 926                 } else {
 927                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 928                         clnt_geterr(client, &rpc_createerr.cf_error);
 929                         goto error;
 930                 }
 931         }
 932
 933 regular_rpcbind:
 934
 935         /* Now the same transport is to be used to get the address */
 936         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 937                         (nconf->nc_semantics == NC_TPI_COTS))) {
 938                 /* A CLTS type of client - destroy it */
 939                 CLNT_DESTROY(client);
 940                 client = NULL;
 941         }
 942
 943         if (client == NULL) {
 944                 client = getclnthandle(host, nconf, &parms.r_addr);
 945                 if (client == NULL) {
 946                         goto error;
 947                 }
 948         }
 949         if (parms.r_addr == NULL) {
 950                 /*LINTED const castaway*/
 951                 parms.r_addr = (char *) &nullstring[0];
 952         }
 953
 954         /* First try from start_vers and then version 3 (RPCBVERS) */
 955
 956         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 957         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 958                 /* Set the version */
 959                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 960                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 961                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 962                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 963                 if (clnt_st == RPC_SUCCESS) {
 964                         if ((ua == NULL) || (ua[0] == 0)) {
 965                                 /* address unknown */
 966                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 967                                 goto error;
 968                         }
 969                         address = uaddr2taddr(nconf, ua);
 970 #ifdef ND_DEBUG
 971                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 972                         if (!address)
 973                                 fprintf(stderr,
 974                                         "\tCouldn't resolve remote address!\n");
 975 #endif
 976                         xdr_free((xdrproc_t)xdr_wrapstring,
 977                             (char *)(void *)&ua);
 978
 979                         if (! address) {
 980                                 /* We don't know about your universal address */
 981                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 982                                 goto error;
 983                         }
 984                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
 985                             (char *)(void *)&servaddr);
 986                         __rpc_fixup_addr(address, &servaddr);
 987                         goto done;
 988                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
 989                         struct rpc_err rpcerr;
 990
 991                         clnt_geterr(client, &rpcerr);
 992                         if (rpcerr.re_vers.low > RPCBVERS4)
 993                                 goto error;  /* a new version, can't handle */
 994                 } else if (clnt_st != RPC_PROGUNAVAIL) {
 995                         /* Cant handle this error */
 996                         rpc_createerr.cf_stat = clnt_st;
 997                         clnt_geterr(client, &rpc_createerr.cf_error);
 998                         goto error;
 999                 }
1000         }
1001
1002 error:
1003         if (client) {
1004                 CLNT_DESTROY(client);
1005                 client = NULL;
1006         }
1007 done:
1008         if (nconf->nc_semantics != NC_TPI_CLTS) {
1009                 /* This client is the connectionless one */
1010                 if (client) {
1011                         CLNT_DESTROY(client);
1012                         client = NULL;
1013                 }
1014         }
1015         if (clpp) {
1016                 *clpp = client;
1017         } else if (client) {
1018                 CLNT_DESTROY(client);
1019         }
1020         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1021                 free(parms.r_addr);
1022         return (address);
1023 }
1024
1025
1026 /*
1027  * Find the mapped address for program, version.
1028  * Calls the rpcbind service remotely to do the lookup.
1029  * Uses the transport specified in nconf.
1030  * Returns FALSE (0) if no map exists, else returns 1.
1031  *
1032  * Assuming that the address is all properly allocated
1033  */
1034 int
1035 rpcb_getaddr(rpcprog_t program, rpcvers_t version,
1036              const struct netconfig *nconf, struct netbuf *address,
1037              const char *host)
1038 {
1039         struct netbuf *na;
1040
1041         if ((na = __rpcb_findaddr_timed(program, version,
1042             (struct netconfig *) nconf, (char *) host,
1043             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1044                 return (FALSE);
1045
1046         if (na->len > address->maxlen) {
1047                 /* Too long address */
1048                 free(na->buf);
1049                 free(na);
1050                 rpc_createerr.cf_stat = RPC_FAILED;
1051                 return (FALSE);
1052         }
1053         memcpy(address->buf, na->buf, (size_t)na->len);
1054         address->len = na->len;
1055         free(na->buf);
1056         free(na);
1057         return (TRUE);
1058 }
1059
1060 /*
1061  * Get a copy of the current maps.
1062  * Calls the rpcbind service remotely to get the maps.
1063  *
1064  * It returns only a list of the services
1065  * It returns NULL on failure.
1066  */
1067 rpcblist *
1068 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1069 {
1070         rpcblist_ptr head = NULL;
1071         CLIENT *client;
1072         enum clnt_stat clnt_st;
1073         rpcvers_t vers = 0;
1074
1075         client = getclnthandle(host, nconf, NULL);
1076         if (client == NULL) {
1077                 return (head);
1078         }
1079         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1080             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1081             (char *)(void *)&head, tottimeout);
1082         if (clnt_st == RPC_SUCCESS)
1083                 goto done;
1084
1085         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1086             (clnt_st != RPC_PROGUNAVAIL)) {
1087                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1088                 clnt_geterr(client, &rpc_createerr.cf_error);
1089                 goto done;
1090         }
1091
1092         /* fall back to earlier version */
1093         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1094         if (vers == RPCBVERS4) {
1095                 vers = RPCBVERS;
1096                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1097                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1098                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1099                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1100                         goto done;
1101         }
1102         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1103         clnt_geterr(client, &rpc_createerr.cf_error);
1104
1105 done:
1106         CLNT_DESTROY(client);
1107         return (head);
1108 }
1109
1110 /*
1111  * rpcbinder remote-call-service interface.
1112  * This routine is used to call the rpcbind remote call service
1113  * which will look up a service program in the address maps, and then
1114  * remotely call that routine with the given parameters. This allows
1115  * programs to do a lookup and call in one step.
1116 */
1117 enum clnt_stat
1118 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog,
1119              rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp,
1120              xdrproc_t xdrres, caddr_t resp, struct timeval tout,
1121              const struct netbuf *addr_ptr)
1122 {
1123         CLIENT *client;
1124         enum clnt_stat stat;
1125         struct r_rpcb_rmtcallargs a;
1126         struct r_rpcb_rmtcallres r;
1127         rpcvers_t rpcb_vers;
1128
1129         stat = 0;
1130         client = getclnthandle(host, nconf, NULL);
1131         if (client == NULL) {
1132                 return (RPC_FAILED);
1133         }
1134         /*LINTED const castaway*/
1135         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1136         a.prog = prog;
1137         a.vers = vers;
1138         a.proc = proc;
1139         a.args.args_val = argsp;
1140         a.xdr_args = xdrargs;
1141         r.addr = NULL;
1142         r.results.results_val = resp;
1143         r.xdr_res = xdrres;
1144
1145         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1146                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1147                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1148                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1149                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1150                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1151                         struct netbuf *na;
1152                         /*LINTED const castaway*/
1153                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1154                         if (!na) {
1155                                 stat = RPC_N2AXLATEFAILURE;
1156                                 /*LINTED const castaway*/
1157                                 ((struct netbuf *) addr_ptr)->len = 0;
1158                                 goto error;
1159                         }
1160                         if (na->len > addr_ptr->maxlen) {
1161                                 /* Too long address */
1162                                 stat = RPC_FAILED; /* XXX A better error no */
1163                                 free(na->buf);
1164                                 free(na);
1165                                 /*LINTED const castaway*/
1166                                 ((struct netbuf *) addr_ptr)->len = 0;
1167                                 goto error;
1168                         }
1169                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1170                         /*LINTED const castaway*/
1171                         ((struct netbuf *)addr_ptr)->len = na->len;
1172                         free(na->buf);
1173                         free(na);
1174                         break;
1175                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1176                             (stat != RPC_PROGUNAVAIL)) {
1177                         goto error;
1178                 }
1179         }
1180 error:
1181         CLNT_DESTROY(client);
1182         if (r.addr)
1183                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1184         return (stat);
1185 }
1186
1187 /*
1188  * Gets the time on the remote host.
1189  * Returns 1 if succeeds else 0.
1190  */
1191 bool_t
1192 rpcb_gettime(const char *host, time_t *timep)
1193 {
1194         CLIENT *client = NULL;
1195         void *handle;
1196         struct netconfig *nconf;
1197         rpcvers_t vers;
1198         enum clnt_stat st;
1199
1200
1201         if ((host == NULL) || (host[0] == 0)) {
1202                 time(timep);
1203                 return (TRUE);
1204         }
1205
1206         if ((handle = __rpc_setconf("netpath")) == NULL) {
1207                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1208                 return (FALSE);
1209         }
1210         rpc_createerr.cf_stat = RPC_SUCCESS;
1211         while (client == NULL) {
1212                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1213                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1214                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1215                         break;
1216                 }
1217                 client = getclnthandle(host, nconf, NULL);
1218                 if (client)
1219                         break;
1220         }
1221         __rpc_endconf(handle);
1222         if (client == (CLIENT *) NULL) {
1223                 return (FALSE);
1224         }
1225
1226         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1227                 (xdrproc_t) xdr_void, NULL,
1228                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1229
1230         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1231                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1232                 if (vers == RPCBVERS4) {
1233                         /* fall back to earlier version */
1234                         vers = RPCBVERS;
1235                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1236                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1237                                 (xdrproc_t) xdr_void, NULL,
1238                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1239                                 tottimeout);
1240                 }
1241         }
1242         CLNT_DESTROY(client);
1243         return (st == RPC_SUCCESS? TRUE: FALSE);
1244 }
1245
1246 /*
1247  * Converts taddr to universal address.  This routine should never
1248  * really be called because local n2a libraries are always provided.
1249  */
1250 char *
1251 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1252 {
1253         CLIENT *client;
1254         char *uaddr = NULL;
1255
1256
1257         /* parameter checking */
1258         if (nconf == NULL) {
1259                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1260                 return (NULL);
1261         }
1262         if (taddr == NULL) {
1263                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1264                 return (NULL);
1265         }
1266         client = local_rpcb();
1267         if (! client) {
1268                 return (NULL);
1269         }
1270
1271         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1272             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1273             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1274         CLNT_DESTROY(client);
1275         return (uaddr);
1276 }
1277
1278 /*
1279  * Converts universal address to netbuf.  This routine should never
1280  * really be called because local n2a libraries are always provided.
1281  */
1282 struct netbuf *
1283 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1284 {
1285         CLIENT *client;
1286         struct netbuf *taddr;
1287
1288
1289         /* parameter checking */
1290         if (nconf == NULL) {
1291                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1292                 return (NULL);
1293         }
1294         if (uaddr == NULL) {
1295                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1296                 return (NULL);
1297         }
1298         client = local_rpcb();
1299         if (! client) {
1300                 return (NULL);
1301         }
1302
1303         taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1304         if (taddr == NULL) {
1305                 CLNT_DESTROY(client);
1306                 return (NULL);
1307         }
1308         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1309             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1310             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1311             tottimeout) != RPC_SUCCESS) {
1312                 free(taddr);
1313                 taddr = NULL;
1314         }
1315         CLNT_DESTROY(client);
1316         return (taddr);
1317 }