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