sys/rpc/rpcb_clnt.c

   1 /*      $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $     */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  *
   6  * Copyright (c) 2010, Oracle America, Inc.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions are met:
  11  * - Redistributions of source code must retain the above copyright notice,
  12  *   this list of conditions and the following disclaimer.
  13  * - Redistributions in binary form must reproduce the above copyright notice,
  14  *   this list of conditions and the following disclaimer in the documentation
  15  *   and/or other materials provided with the distribution.
  16  * - Neither the name of the "Oracle America, Inc." nor the names of its
  17  *   contributors may be used to endorse or promote products derived
  18  *   from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 /*
  33  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  34  */
  35
  36 /* #ident       "@(#)rpcb_clnt.c        1.27    94/04/24 SMI" */
  37
  38
  39 #if defined(LIBC_SCCS) && !defined(lint)
  40 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
  41 #endif
  42 #include <sys/cdefs.h>
  43 __FBSDID("$FreeBSD$");
  44
  45 /*
  46  * rpcb_clnt.c
  47  * interface to rpcbind rpc service.
  48  *
  49  * Copyright (C) 1988, Sun Microsystems, Inc.
  50  */
  51
  52 #include "opt_inet6.h"
  53
  54 #include <sys/param.h>
  55 #include <sys/systm.h>
  56 #include <sys/kernel.h>
  57 #include <sys/malloc.h>
  58 #include <sys/proc.h>
  59 #include <sys/socket.h>
  60 #include <sys/socketvar.h>
  61
  62 #include <rpc/rpc.h>
  63 #include <rpc/rpcb_clnt.h>
  64 #include <rpc/rpcb_prot.h>
  65
  66 #include <rpc/rpc_com.h>
  67
  68 static struct timeval tottimeout = { 60, 0 };
  69 static const char nullstring[] = "\000";
  70
  71 static CLIENT *local_rpcb(void);
  72
  73 #if 0
  74
  75 static const struct timeval rmttimeout = { 3, 0 };
  76 static struct timeval rpcbrmttime = { 15, 0 };
  77
  78 #define CACHESIZE 6
  79
  80 struct address_cache {
  81         char *ac_host;
  82         char *ac_netid;
  83         char *ac_uaddr;
  84         struct netbuf *ac_taddr;
  85         struct address_cache *ac_next;
  86 };
  87
  88 static struct address_cache *front;
  89 static int cachesize;
  90
  91 #define CLCR_GET_RPCB_TIMEOUT   1
  92 #define CLCR_SET_RPCB_TIMEOUT   2
  93
  94
  95 extern int __rpc_lowvers;
  96
  97 static struct address_cache *check_cache(const char *, const char *);
  98 static void delete_cache(struct netbuf *);
  99 static void add_cache(const char *, const char *, struct netbuf *, char *);
 100 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
 101 static CLIENT *local_rpcb(void);
 102 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
 103
 104 /*
 105  * This routine adjusts the timeout used for calls to the remote rpcbind.
 106  * Also, this routine can be used to set the use of portmapper version 2
 107  * only when doing rpc_broadcasts
 108  * These are private routines that may not be provided in future releases.
 109  */
 110 bool_t
 111 __rpc_control(request, info)
 112         int     request;
 113         void    *info;
 114 {
 115         switch (request) {
 116         case CLCR_GET_RPCB_TIMEOUT:
 117                 *(struct timeval *)info = tottimeout;
 118                 break;
 119         case CLCR_SET_RPCB_TIMEOUT:
 120                 tottimeout = *(struct timeval *)info;
 121                 break;
 122         case CLCR_SET_LOWVERS:
 123                 __rpc_lowvers = *(int *)info;
 124                 break;
 125         case CLCR_GET_LOWVERS:
 126                 *(int *)info = __rpc_lowvers;
 127                 break;
 128         default:
 129                 return (FALSE);
 130         }
 131         return (TRUE);
 132 }
 133
 134 /*
 135  *      It might seem that a reader/writer lock would be more reasonable here.
 136  *      However because getclnthandle(), the only user of the cache functions,
 137  *      may do a delete_cache() operation if a check_cache() fails to return an
 138  *      address useful to clnt_tli_create(), we may as well use a mutex.
 139  */
 140 /*
 141  * As it turns out, if the cache lock is *not* a reader/writer lock, we will
 142  * block all clnt_create's if we are trying to connect to a host that's down,
 143  * since the lock will be held all during that time.
 144  */
 145
 146 /*
 147  * The routines check_cache(), add_cache(), delete_cache() manage the
 148  * cache of rpcbind addresses for (host, netid).
 149  */
 150
 151 static struct address_cache *
 152 check_cache(host, netid)
 153         const char *host, *netid;
 154 {
 155         struct address_cache *cptr;
 156
 157         /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 158
 159         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 160                 if (!strcmp(cptr->ac_host, host) &&
 161                     !strcmp(cptr->ac_netid, netid)) {
 162 #ifdef ND_DEBUG
 163                         fprintf(stderr, "Found cache entry for %s: %s\n",
 164                                 host, netid);
 165 #endif
 166                         return (cptr);
 167                 }
 168         }
 169         return ((struct address_cache *) NULL);
 170 }
 171
 172 static void
 173 delete_cache(addr)
 174         struct netbuf *addr;
 175 {
 176         struct address_cache *cptr, *prevptr = NULL;
 177
 178         /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 179         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 180                 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
 181                         free(cptr->ac_host);
 182                         free(cptr->ac_netid);
 183                         free(cptr->ac_taddr->buf);
 184                         free(cptr->ac_taddr);
 185                         if (cptr->ac_uaddr)
 186                                 free(cptr->ac_uaddr);
 187                         if (prevptr)
 188                                 prevptr->ac_next = cptr->ac_next;
 189                         else
 190                                 front = cptr->ac_next;
 191                         free(cptr);
 192                         cachesize--;
 193                         break;
 194                 }
 195                 prevptr = cptr;
 196         }
 197 }
 198
 199 static void
 200 add_cache(host, netid, taddr, uaddr)
 201         const char *host, *netid;
 202         char *uaddr;
 203         struct netbuf *taddr;
 204 {
 205         struct address_cache  *ad_cache, *cptr, *prevptr;
 206
 207         ad_cache = (struct address_cache *)
 208                         malloc(sizeof (struct address_cache));
 209         if (!ad_cache) {
 210                 return;
 211         }
 212         ad_cache->ac_host = strdup(host);
 213         ad_cache->ac_netid = strdup(netid);
 214         ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
 215         ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
 216         if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
 217                 (uaddr && !ad_cache->ac_uaddr)) {
 218                 goto out;
 219         }
 220         ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
 221         ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
 222         if (ad_cache->ac_taddr->buf == NULL) {
 223 out:
 224                 if (ad_cache->ac_host)
 225                         free(ad_cache->ac_host);
 226                 if (ad_cache->ac_netid)
 227                         free(ad_cache->ac_netid);
 228                 if (ad_cache->ac_uaddr)
 229                         free(ad_cache->ac_uaddr);
 230                 if (ad_cache->ac_taddr)
 231                         free(ad_cache->ac_taddr);
 232                 free(ad_cache);
 233                 return;
 234         }
 235         memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
 236 #ifdef ND_DEBUG
 237         fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
 238 #endif
 239
 240 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  cptr */
 241
 242         rwlock_wrlock(&rpcbaddr_cache_lock);
 243         if (cachesize < CACHESIZE) {
 244                 ad_cache->ac_next = front;
 245                 front = ad_cache;
 246                 cachesize++;
 247         } else {
 248                 /* Free the last entry */
 249                 cptr = front;
 250                 prevptr = NULL;
 251                 while (cptr->ac_next) {
 252                         prevptr = cptr;
 253                         cptr = cptr->ac_next;
 254                 }
 255
 256 #ifdef ND_DEBUG
 257                 fprintf(stderr, "Deleted from cache: %s : %s\n",
 258                         cptr->ac_host, cptr->ac_netid);
 259 #endif
 260                 free(cptr->ac_host);
 261                 free(cptr->ac_netid);
 262                 free(cptr->ac_taddr->buf);
 263                 free(cptr->ac_taddr);
 264                 if (cptr->ac_uaddr)
 265                         free(cptr->ac_uaddr);
 266
 267                 if (prevptr) {
 268                         prevptr->ac_next = NULL;
 269                         ad_cache->ac_next = front;
 270                         front = ad_cache;
 271                 } else {
 272                         front = ad_cache;
 273                         ad_cache->ac_next = NULL;
 274                 }
 275                 free(cptr);
 276         }
 277         rwlock_unlock(&rpcbaddr_cache_lock);
 278 }
 279
 280 /*
 281  * This routine will return a client handle that is connected to the
 282  * rpcbind. If targaddr is non-NULL, the "universal address" of the
 283  * host will be stored in *targaddr; the caller is responsible for
 284  * freeing this string.
 285  * On error, returns NULL and free's everything.
 286  */
 287 static CLIENT *
 288 getclnthandle(host, nconf, targaddr)
 289         const char *host;
 290         const struct netconfig *nconf;
 291         char **targaddr;
 292 {
 293         CLIENT *client;
 294         struct netbuf *addr, taddr;
 295         struct netbuf addr_to_delete;
 296         struct __rpc_sockinfo si;
 297         struct addrinfo hints, *res, *tres;
 298         struct address_cache *ad_cache;
 299         char *tmpaddr;
 300
 301 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  ad_cache */
 302
 303         /* Get the address of the rpcbind.  Check cache first */
 304         client = NULL;
 305         addr_to_delete.len = 0;
 306         rwlock_rdlock(&rpcbaddr_cache_lock);
 307         ad_cache = NULL;
 308         if (host != NULL)
 309                 ad_cache = check_cache(host, nconf->nc_netid);
 310         if (ad_cache != NULL) {
 311                 addr = ad_cache->ac_taddr;
 312                 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
 313                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 314                 if (client != NULL) {
 315                         if (targaddr)
 316                                 *targaddr = strdup(ad_cache->ac_uaddr);
 317                         rwlock_unlock(&rpcbaddr_cache_lock);
 318                         return (client);
 319                 }
 320                 addr_to_delete.len = addr->len;
 321                 addr_to_delete.buf = (char *)malloc(addr->len);
 322                 if (addr_to_delete.buf == NULL) {
 323                         addr_to_delete.len = 0;
 324                 } else {
 325                         memcpy(addr_to_delete.buf, addr->buf, addr->len);
 326                 }
 327         }
 328         rwlock_unlock(&rpcbaddr_cache_lock);
 329         if (addr_to_delete.len != 0) {
 330                 /*
 331                  * Assume this may be due to cache data being
 332                  *  outdated
 333                  */
 334                 rwlock_wrlock(&rpcbaddr_cache_lock);
 335                 delete_cache(&addr_to_delete);
 336                 rwlock_unlock(&rpcbaddr_cache_lock);
 337                 free(addr_to_delete.buf);
 338         }
 339         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 340                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 341                 return NULL;
 342         }
 343
 344         memset(&hints, 0, sizeof hints);
 345         hints.ai_family = si.si_af;
 346         hints.ai_socktype = si.si_socktype;
 347         hints.ai_protocol = si.si_proto;
 348
 349 #ifdef CLNT_DEBUG
 350         printf("trying netid %s family %d proto %d socktype %d\n",
 351             nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
 352 #endif
 353
 354         if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 355                 client = local_rpcb();
 356                 if (! client) {
 357 #ifdef ND_DEBUG
 358                         clnt_pcreateerror("rpcbind clnt interface");
 359 #endif
 360                         return (NULL);
 361                 } else {
 362                         struct sockaddr_un sun;
 363                         if (targaddr) {
 364                             *targaddr = malloc(sizeof(sun.sun_path));
 365                             if (*targaddr == NULL) {
 366                                 CLNT_DESTROY(client);
 367                                 return (NULL);
 368                             }
 369                             strncpy(*targaddr, _PATH_RPCBINDSOCK,
 370                                 sizeof(sun.sun_path));
 371                         }
 372                         return (client);
 373                 }
 374         } else {
 375                 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
 376                         rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
 377                         return NULL;
 378                 }
 379         }
 380
 381         for (tres = res; tres != NULL; tres = tres->ai_next) {
 382                 taddr.buf = tres->ai_addr;
 383                 taddr.len = taddr.maxlen = tres->ai_addrlen;
 384
 385 #ifdef ND_DEBUG
 386                 {
 387                         char *ua;
 388
 389                         ua = taddr2uaddr(nconf, &taddr);
 390                         fprintf(stderr, "Got it [%s]\n", ua);
 391                         free(ua);
 392                 }
 393 #endif
 394
 395 #ifdef ND_DEBUG
 396                 {
 397                         int i;
 398
 399                         fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
 400                                 taddr.len, taddr.maxlen);
 401                         fprintf(stderr, "\tAddress is ");
 402                         for (i = 0; i < taddr.len; i++)
 403                                 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
 404                         fprintf(stderr, "\n");
 405                 }
 406 #endif
 407                 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
 408                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 409 #ifdef ND_DEBUG
 410                 if (! client) {
 411                         clnt_pcreateerror("rpcbind clnt interface");
 412                 }
 413 #endif
 414
 415                 if (client) {
 416                         tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
 417                         add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
 418                         if (targaddr)
 419                                 *targaddr = tmpaddr;
 420                         break;
 421                 }
 422         }
 423         if (res)
 424                 freeaddrinfo(res);
 425         return (client);
 426 }
 427
 428 #endif
 429
 430 /* XXX */
 431 #define IN4_LOCALHOST_STRING    "127.0.0.1"
 432 #define IN6_LOCALHOST_STRING    "::1"
 433
 434 /*
 435  * This routine will return a client handle that is connected to the local
 436  * rpcbind. Returns NULL on error and free's everything.
 437  */
 438 static CLIENT *
 439 local_rpcb()
 440 {
 441         CLIENT *client;
 442         struct socket *so;
 443         size_t tsize;
 444         struct sockaddr_un sun;
 445         int error;
 446
 447         /*
 448          * Try connecting to the local rpcbind through a local socket
 449          * first. If this doesn't work, try all transports defined in
 450          * the netconfig file.
 451          */
 452         memset(&sun, 0, sizeof sun);
 453         so = NULL;
 454         error = socreate(AF_LOCAL, &so, SOCK_STREAM, 0, curthread->td_ucred,
 455             curthread);
 456         if (error)
 457                 goto try_nconf;
 458         sun.sun_family = AF_LOCAL;
 459         strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 460         sun.sun_len = SUN_LEN(&sun);
 461
 462         tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
 463         client = clnt_vc_create(so, (struct sockaddr *)&sun, (rpcprog_t)RPCBPROG,
 464             (rpcvers_t)RPCBVERS, tsize, tsize, 1);
 465
 466         if (client != NULL) {
 467                 /* Mark the socket to be closed in destructor */
 468                 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
 469                 return client;
 470         }
 471
 472         /* Nobody needs this socket anymore; free the descriptor. */
 473         soclose(so);
 474
 475 try_nconf:
 476
 477 #if 0
 478         static struct netconfig *loopnconf;
 479         static char *localhostname;
 480
 481 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
 482         mutex_lock(&loopnconf_lock);
 483         if (loopnconf == NULL) {
 484                 struct netconfig *nconf, *tmpnconf = NULL;
 485                 void *nc_handle;
 486                 int fd;
 487
 488                 nc_handle = setnetconfig();
 489                 if (nc_handle == NULL) {
 490                         /* fails to open netconfig file */
 491                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 492                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 493                         mutex_unlock(&loopnconf_lock);
 494                         return (NULL);
 495                 }
 496                 while ((nconf = getnetconfig(nc_handle)) != NULL) {
 497                         if ((
 498 #ifdef INET6
 499                              strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
 500 #endif
 501                              strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
 502                             (nconf->nc_semantics == NC_TPI_COTS ||
 503                              nconf->nc_semantics == NC_TPI_COTS_ORD)) {
 504                                 fd = __rpc_nconf2fd(nconf);
 505                                 /*
 506                                  * Can't create a socket, assume that
 507                                  * this family isn't configured in the kernel.
 508                                  */
 509                                 if (fd < 0)
 510                                         continue;
 511                                 _close(fd);
 512                                 tmpnconf = nconf;
 513                                 if (!strcmp(nconf->nc_protofmly, NC_INET))
 514                                         localhostname = IN4_LOCALHOST_STRING;
 515                                 else
 516                                         localhostname = IN6_LOCALHOST_STRING;
 517                         }
 518                 }
 519                 if (tmpnconf == NULL) {
 520                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 521                         mutex_unlock(&loopnconf_lock);
 522                         return (NULL);
 523                 }
 524                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 525                 /* loopnconf is never freed */
 526                 endnetconfig(nc_handle);
 527         }
 528         mutex_unlock(&loopnconf_lock);
 529         client = getclnthandle(localhostname, loopnconf, NULL);
 530         return (client);
 531 #else
 532         return (NULL);
 533 #endif
 534 }
 535
 536 /*
 537  * Set a mapping between program, version and address.
 538  * Calls the rpcbind service to do the mapping.
 539  */
 540 bool_t
 541 rpcb_set(rpcprog_t program, rpcvers_t version,
 542     const struct netconfig *nconf,      /* Network structure of transport */
 543     const struct netbuf *address)       /* Services netconfig address */
 544 {
 545         CLIENT *client;
 546         bool_t rslt = FALSE;
 547         RPCB parms;
 548 #if 0
 549         char uidbuf[32];
 550 #endif
 551         struct netconfig nconfcopy;
 552         struct netbuf addresscopy;
 553
 554         /* parameter checking */
 555         if (nconf == NULL) {
 556                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 557                 return (FALSE);
 558         }
 559         if (address == NULL) {
 560                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 561                 return (FALSE);
 562         }
 563         client = local_rpcb();
 564         if (! client) {
 565                 return (FALSE);
 566         }
 567
 568         /* convert to universal */
 569         /*LINTED const castaway*/
 570         nconfcopy = *nconf;
 571         addresscopy = *address;
 572         parms.r_addr = taddr2uaddr(&nconfcopy, &addresscopy);
 573         if (!parms.r_addr) {
 574                 CLNT_DESTROY(client);
 575                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 576                 return (FALSE); /* no universal address */
 577         }
 578         parms.r_prog = program;
 579         parms.r_vers = version;
 580         parms.r_netid = nconf->nc_netid;
 581 #if 0
 582         /*
 583          * Though uid is not being used directly, we still send it for
 584          * completeness.  For non-unix platforms, perhaps some other
 585          * string or an empty string can be sent.
 586          */
 587         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 588         parms.r_owner = uidbuf;
 589 #else
 590         parms.r_owner = "";
 591 #endif
 592
 593         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 594             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 595             (char *)(void *)&rslt, tottimeout);
 596
 597         CLNT_DESTROY(client);
 598         free(parms.r_addr, M_RPC);
 599         return (rslt);
 600 }
 601
 602 /*
 603  * Remove the mapping between program, version and netbuf address.
 604  * Calls the rpcbind service to do the un-mapping.
 605  * If netbuf is NULL, unset for all the transports, otherwise unset
 606  * only for the given transport.
 607  */
 608 bool_t
 609 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
 610 {
 611         CLIENT *client;
 612         bool_t rslt = FALSE;
 613         RPCB parms;
 614 #if 0
 615         char uidbuf[32];
 616 #endif
 617
 618         client = local_rpcb();
 619         if (! client) {
 620                 return (FALSE);
 621         }
 622
 623         parms.r_prog = program;
 624         parms.r_vers = version;
 625         if (nconf)
 626                 parms.r_netid = nconf->nc_netid;
 627         else {
 628                 /*LINTED const castaway*/
 629                 parms.r_netid = (char *)(uintptr_t) &nullstring[0]; /* unsets  all */
 630         }
 631         /*LINTED const castaway*/
 632         parms.r_addr = (char *)(uintptr_t) &nullstring[0];
 633 #if 0
 634         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 635         parms.r_owner = uidbuf;
 636 #else
 637         parms.r_owner = "";
 638 #endif
 639
 640         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 641             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 642             (char *)(void *)&rslt, tottimeout);
 643
 644         CLNT_DESTROY(client);
 645         return (rslt);
 646 }
 647
 648 #if 0
 649
 650 /*
 651  * From the merged list, find the appropriate entry
 652  */
 653 static struct netbuf *
 654 got_entry(relp, nconf)
 655         rpcb_entry_list_ptr relp;
 656         const struct netconfig *nconf;
 657 {
 658         struct netbuf *na = NULL;
 659         rpcb_entry_list_ptr sp;
 660         rpcb_entry *rmap;
 661
 662         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 663                 rmap = &sp->rpcb_entry_map;
 664                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 665                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 666                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 667                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 668                         na = uaddr2taddr(nconf, rmap->r_maddr);
 669 #ifdef ND_DEBUG
 670                         fprintf(stderr, "\tRemote address is [%s].\n",
 671                                 rmap->r_maddr);
 672                         if (!na)
 673                                 fprintf(stderr,
 674                                     "\tCouldn't resolve remote address!\n");
 675 #endif
 676                         break;
 677                 }
 678         }
 679         return (na);
 680 }
 681
 682 /*
 683  * Quick check to see if rpcbind is up.  Tries to connect over
 684  * local transport.
 685  */
 686 static bool_t
 687 __rpcbind_is_up()
 688 {
 689         struct netconfig *nconf;
 690         struct sockaddr_un sun;
 691         void *localhandle;
 692         int sock;
 693
 694         nconf = NULL;
 695         localhandle = setnetconfig();
 696         while ((nconf = getnetconfig(localhandle)) != NULL) {
 697                 if (nconf->nc_protofmly != NULL &&
 698                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 699                          break;
 700         }
 701         if (nconf == NULL)
 702                 return (FALSE);
 703
 704         endnetconfig(localhandle);
 705
 706         memset(&sun, 0, sizeof sun);
 707         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 708         if (sock < 0)
 709                 return (FALSE);
 710         sun.sun_family = AF_LOCAL;
 711         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 712         sun.sun_len = SUN_LEN(&sun);
 713
 714         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 715                 _close(sock);
 716                 return (FALSE);
 717         }
 718
 719         _close(sock);
 720         return (TRUE);
 721 }
 722
 723 /*
 724  * An internal function which optimizes rpcb_getaddr function.  It also
 725  * returns the client handle that it uses to contact the remote rpcbind.
 726  *
 727  * The algorithm used: If the transports is TCP or UDP, it first tries
 728  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 729  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 730  * that time, version 4 would be available on many machines on the network.
 731  * With this algorithm, we get performance as well as a plan for
 732  * obsoleting version 2.
 733  *
 734  * For all other transports, the algorithm remains as 4 and then 3.
 735  *
 736  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 737  * handle for COTS cases and hence in these cases we do not return the
 738  * client handle.  This code will change if t_connect() ever
 739  * starts working properly.  Also look under clnt_vc.c.
 740  */
 741 struct netbuf *
 742 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
 743         rpcprog_t program;
 744         rpcvers_t version;
 745         const struct netconfig *nconf;
 746         const char *host;
 747         CLIENT **clpp;
 748         struct timeval *tp;
 749 {
 750         static bool_t check_rpcbind = TRUE;
 751         CLIENT *client = NULL;
 752         RPCB parms;
 753         enum clnt_stat clnt_st;
 754         char *ua = NULL;
 755         rpcvers_t vers;
 756         struct netbuf *address = NULL;
 757         rpcvers_t start_vers = RPCBVERS4;
 758         struct netbuf servaddr;
 759
 760         /* parameter checking */
 761         if (nconf == NULL) {
 762                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 763                 return (NULL);
 764         }
 765
 766         parms.r_addr = NULL;
 767
 768         /*
 769          * Use default total timeout if no timeout is specified.
 770          */
 771         if (tp == NULL)
 772                 tp = &tottimeout;
 773
 774 #ifdef PORTMAP
 775         /* Try version 2 for TCP or UDP */
 776         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 777                 u_short port = 0;
 778                 struct netbuf remote;
 779                 rpcvers_t pmapvers = 2;
 780                 struct pmap pmapparms;
 781
 782                 /*
 783                  * Try UDP only - there are some portmappers out
 784                  * there that use UDP only.
 785                  */
 786                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 787                         struct netconfig *newnconf;
 788
 789                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 790                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 791                                 return (NULL);
 792                         }
 793                         client = getclnthandle(host, newnconf, &parms.r_addr);
 794                         freenetconfigent(newnconf);
 795                 } else {
 796                         client = getclnthandle(host, nconf, &parms.r_addr);
 797                 }
 798                 if (client == NULL)
 799                         return (NULL);
 800
 801                 /*
 802                  * Set version and retry timeout.
 803                  */
 804                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 805                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 806
 807                 pmapparms.pm_prog = program;
 808                 pmapparms.pm_vers = version;
 809                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 810                                         IPPROTO_UDP : IPPROTO_TCP;
 811                 pmapparms.pm_port = 0;  /* not needed */
 812                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 813                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 814                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 815                     *tp);
 816                 if (clnt_st != RPC_SUCCESS) {
 817                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 818                                 (clnt_st == RPC_PROGUNAVAIL))
 819                                 goto try_rpcbind; /* Try different versions */
 820                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 821                         clnt_geterr(client, &rpc_createerr.cf_error);
 822                         goto error;
 823                 } else if (port == 0) {
 824                         address = NULL;
 825                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 826                         goto error;
 827                 }
 828                 port = htons(port);
 829                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 830                 if (((address = (struct netbuf *)
 831                         malloc(sizeof (struct netbuf))) == NULL) ||
 832                     ((address->buf = (char *)
 833                         malloc(remote.len)) == NULL)) {
 834                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 835                         clnt_geterr(client, &rpc_createerr.cf_error);
 836                         if (address) {
 837                                 free(address);
 838                                 address = NULL;
 839                         }
 840                         goto error;
 841                 }
 842                 memcpy(address->buf, remote.buf, remote.len);
 843                 memcpy(&((char *)address->buf)[sizeof (short)],
 844                                 (char *)(void *)&port, sizeof (short));
 845                 address->len = address->maxlen = remote.len;
 846                 goto done;
 847         }
 848 #endif                          /* PORTMAP */
 849
 850 try_rpcbind:
 851         /*
 852          * Check if rpcbind is up.  This prevents needless delays when
 853          * accessing applications such as the keyserver while booting
 854          * disklessly.
 855          */
 856         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 857                 if (!__rpcbind_is_up()) {
 858                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 859                         rpc_createerr.cf_error.re_errno = 0;
 860                         goto error;
 861                 }
 862                 check_rpcbind = FALSE;
 863         }
 864
 865         /*
 866          * Now we try version 4 and then 3.
 867          * We also send the remote system the address we used to
 868          * contact it in case it can help to connect back with us
 869          */
 870         parms.r_prog = program;
 871         parms.r_vers = version;
 872         /*LINTED const castaway*/
 873         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 874                                                         /* just for xdring */
 875         parms.r_netid = nconf->nc_netid; /* not really needed */
 876
 877         /*
 878          * If a COTS transport is being used, try getting address via CLTS
 879          * transport.  This works only with version 4.
 880          */
 881         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 882                         nconf->nc_semantics == NC_TPI_COTS) {
 883
 884                 void *handle;
 885                 struct netconfig *nconf_clts;
 886                 rpcb_entry_list_ptr relp = NULL;
 887
 888                 if (client == NULL) {
 889                         /* This did not go through the above PORTMAP/TCP code */
 890                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 891                                 while ((nconf_clts = __rpc_getconf(handle))
 892                                         != NULL) {
 893                                         if (strcmp(nconf_clts->nc_protofmly,
 894                                                 nconf->nc_protofmly) != 0) {
 895                                                 continue;
 896                                         }
 897                                         client = getclnthandle(host, nconf_clts,
 898                                                         &parms.r_addr);
 899                                         break;
 900                                 }
 901                                 __rpc_endconf(handle);
 902                         }
 903                         if (client == NULL)
 904                                 goto regular_rpcbind;   /* Go the regular way */
 905                 } else {
 906                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 907                         vers = RPCBVERS4;
 908                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 909                 }
 910                 /*
 911                  * We also send the remote system the address we used to
 912                  * contact it in case it can help it connect back with us
 913                  */
 914                 if (parms.r_addr == NULL) {
 915                         /*LINTED const castaway*/
 916                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 917                 }
 918
 919                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 920
 921                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 922                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 923                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 924                     (char *)(void *)&relp, *tp);
 925                 if (clnt_st == RPC_SUCCESS) {
 926                         if ((address = got_entry(relp, nconf)) != NULL) {
 927                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 928                                     (char *)(void *)&relp);
 929                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 930                                         (char *)(void *)&servaddr);
 931                                 __rpc_fixup_addr(address, &servaddr);
 932                                 goto done;
 933                         }
 934                         /* Entry not found for this transport */
 935                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 936                             (char *)(void *)&relp);
 937                         /*
 938                          * XXX: should have perhaps returned with error but
 939                          * since the remote machine might not always be able
 940                          * to send the address on all transports, we try the
 941                          * regular way with regular_rpcbind
 942                          */
 943                         goto regular_rpcbind;
 944                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 945                         (clnt_st == RPC_PROGUNAVAIL)) {
 946                         start_vers = RPCBVERS;  /* Try version 3 now */
 947                         goto regular_rpcbind; /* Try different versions */
 948                 } else {
 949                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 950                         clnt_geterr(client, &rpc_createerr.cf_error);
 951                         goto error;
 952                 }
 953         }
 954
 955 regular_rpcbind:
 956
 957         /* Now the same transport is to be used to get the address */
 958         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 959                         (nconf->nc_semantics == NC_TPI_COTS))) {
 960                 /* A CLTS type of client - destroy it */
 961                 CLNT_DESTROY(client);
 962                 client = NULL;
 963         }
 964
 965         if (client == NULL) {
 966                 client = getclnthandle(host, nconf, &parms.r_addr);
 967                 if (client == NULL) {
 968                         goto error;
 969                 }
 970         }
 971         if (parms.r_addr == NULL) {
 972                 /*LINTED const castaway*/
 973                 parms.r_addr = (char *) &nullstring[0];
 974         }
 975
 976         /* First try from start_vers and then version 3 (RPCBVERS) */
 977
 978         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 979         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 980                 /* Set the version */
 981                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 982                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 983                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 984                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 985                 if (clnt_st == RPC_SUCCESS) {
 986                         if ((ua == NULL) || (ua[0] == 0)) {
 987                                 /* address unknown */
 988                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 989                                 goto error;
 990                         }
 991                         address = uaddr2taddr(nconf, ua);
 992 #ifdef ND_DEBUG
 993                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 994                         if (!address)
 995                                 fprintf(stderr,
 996                                         "\tCouldn't resolve remote address!\n");
 997 #endif
 998                         xdr_free((xdrproc_t)xdr_wrapstring,
 999                             (char *)(void *)&ua);
1000
1001                         if (! address) {
1002                                 /* We don't know about your universal address */
1003                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
1004                                 goto error;
1005                         }
1006                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
1007                             (char *)(void *)&servaddr);
1008                         __rpc_fixup_addr(address, &servaddr);
1009                         goto done;
1010                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1011                         struct rpc_err rpcerr;
1012
1013                         clnt_geterr(client, &rpcerr);
1014                         if (rpcerr.re_vers.low > RPCBVERS4)
1015                                 goto error;  /* a new version, can't handle */
1016                 } else if (clnt_st != RPC_PROGUNAVAIL) {
1017                         /* Cant handle this error */
1018                         rpc_createerr.cf_stat = clnt_st;
1019                         clnt_geterr(client, &rpc_createerr.cf_error);
1020                         goto error;
1021                 }
1022         }
1023
1024 error:
1025         if (client) {
1026                 CLNT_DESTROY(client);
1027                 client = NULL;
1028         }
1029 done:
1030         if (nconf->nc_semantics != NC_TPI_CLTS) {
1031                 /* This client is the connectionless one */
1032                 if (client) {
1033                         CLNT_DESTROY(client);
1034                         client = NULL;
1035                 }
1036         }
1037         if (clpp) {
1038                 *clpp = client;
1039         } else if (client) {
1040                 CLNT_DESTROY(client);
1041         }
1042         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1043                 free(parms.r_addr);
1044         return (address);
1045 }
1046
1047
1048 /*
1049  * Find the mapped address for program, version.
1050  * Calls the rpcbind service remotely to do the lookup.
1051  * Uses the transport specified in nconf.
1052  * Returns FALSE (0) if no map exists, else returns 1.
1053  *
1054  * Assuming that the address is all properly allocated
1055  */
1056 bool_t
1057 rpcb_getaddr(program, version, nconf, address, host)
1058         rpcprog_t program;
1059         rpcvers_t version;
1060         const struct netconfig *nconf;
1061         struct netbuf *address;
1062         const char *host;
1063 {
1064         struct netbuf *na;
1065
1066         if ((na = __rpcb_findaddr_timed(program, version,
1067             (struct netconfig *) nconf, (char *) host,
1068             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1069                 return (FALSE);
1070
1071         if (na->len > address->maxlen) {
1072                 /* Too long address */
1073                 free(na->buf);
1074                 free(na);
1075                 rpc_createerr.cf_stat = RPC_FAILED;
1076                 return (FALSE);
1077         }
1078         memcpy(address->buf, na->buf, (size_t)na->len);
1079         address->len = na->len;
1080         free(na->buf);
1081         free(na);
1082         return (TRUE);
1083 }
1084
1085 /*
1086  * Get a copy of the current maps.
1087  * Calls the rpcbind service remotely to get the maps.
1088  *
1089  * It returns only a list of the services
1090  * It returns NULL on failure.
1091  */
1092 rpcblist *
1093 rpcb_getmaps(nconf, host)
1094         const struct netconfig *nconf;
1095         const char *host;
1096 {
1097         rpcblist_ptr head = NULL;
1098         CLIENT *client;
1099         enum clnt_stat clnt_st;
1100         rpcvers_t vers = 0;
1101
1102         client = getclnthandle(host, nconf, NULL);
1103         if (client == NULL) {
1104                 return (head);
1105         }
1106         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1107             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1108             (char *)(void *)&head, tottimeout);
1109         if (clnt_st == RPC_SUCCESS)
1110                 goto done;
1111
1112         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1113             (clnt_st != RPC_PROGUNAVAIL)) {
1114                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1115                 clnt_geterr(client, &rpc_createerr.cf_error);
1116                 goto done;
1117         }
1118
1119         /* fall back to earlier version */
1120         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1121         if (vers == RPCBVERS4) {
1122                 vers = RPCBVERS;
1123                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1124                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1125                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1126                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1127                         goto done;
1128         }
1129         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1130         clnt_geterr(client, &rpc_createerr.cf_error);
1131
1132 done:
1133         CLNT_DESTROY(client);
1134         return (head);
1135 }
1136
1137 /*
1138  * rpcbinder remote-call-service interface.
1139  * This routine is used to call the rpcbind remote call service
1140  * which will look up a service program in the address maps, and then
1141  * remotely call that routine with the given parameters. This allows
1142  * programs to do a lookup and call in one step.
1143 */
1144 enum clnt_stat
1145 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1146                 xdrres, resp, tout, addr_ptr)
1147         const struct netconfig *nconf;  /* Netconfig structure */
1148         const char *host;                       /* Remote host name */
1149         rpcprog_t prog;
1150         rpcvers_t vers;
1151         rpcproc_t proc;                 /* Remote proc identifiers */
1152         xdrproc_t xdrargs, xdrres;      /* XDR routines */
1153         caddr_t argsp, resp;            /* Argument and Result */
1154         struct timeval tout;            /* Timeout value for this call */
1155         const struct netbuf *addr_ptr;  /* Preallocated netbuf address */
1156 {
1157         CLIENT *client;
1158         enum clnt_stat stat;
1159         struct r_rpcb_rmtcallargs a;
1160         struct r_rpcb_rmtcallres r;
1161         rpcvers_t rpcb_vers;
1162
1163         stat = 0;
1164         client = getclnthandle(host, nconf, NULL);
1165         if (client == NULL) {
1166                 return (RPC_FAILED);
1167         }
1168         /*LINTED const castaway*/
1169         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1170         a.prog = prog;
1171         a.vers = vers;
1172         a.proc = proc;
1173         a.args.args_val = argsp;
1174         a.xdr_args = xdrargs;
1175         r.addr = NULL;
1176         r.results.results_val = resp;
1177         r.xdr_res = xdrres;
1178
1179         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1180                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1181                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1182                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1183                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1184                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1185                         struct netbuf *na;
1186                         /*LINTED const castaway*/
1187                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1188                         if (!na) {
1189                                 stat = RPC_N2AXLATEFAILURE;
1190                                 /*LINTED const castaway*/
1191                                 ((struct netbuf *) addr_ptr)->len = 0;
1192                                 goto error;
1193                         }
1194                         if (na->len > addr_ptr->maxlen) {
1195                                 /* Too long address */
1196                                 stat = RPC_FAILED; /* XXX A better error no */
1197                                 free(na->buf);
1198                                 free(na);
1199                                 /*LINTED const castaway*/
1200                                 ((struct netbuf *) addr_ptr)->len = 0;
1201                                 goto error;
1202                         }
1203                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1204                         /*LINTED const castaway*/
1205                         ((struct netbuf *)addr_ptr)->len = na->len;
1206                         free(na->buf);
1207                         free(na);
1208                         break;
1209                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1210                             (stat != RPC_PROGUNAVAIL)) {
1211                         goto error;
1212                 }
1213         }
1214 error:
1215         CLNT_DESTROY(client);
1216         if (r.addr)
1217                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1218         return (stat);
1219 }
1220
1221 /*
1222  * Gets the time on the remote host.
1223  * Returns 1 if succeeds else 0.
1224  */
1225 bool_t
1226 rpcb_gettime(host, timep)
1227         const char *host;
1228         time_t *timep;
1229 {
1230         CLIENT *client = NULL;
1231         void *handle;
1232         struct netconfig *nconf;
1233         rpcvers_t vers;
1234         enum clnt_stat st;
1235
1236
1237         if ((host == NULL) || (host[0] == 0)) {
1238                 time(timep);
1239                 return (TRUE);
1240         }
1241
1242         if ((handle = __rpc_setconf("netpath")) == NULL) {
1243                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1244                 return (FALSE);
1245         }
1246         rpc_createerr.cf_stat = RPC_SUCCESS;
1247         while (client == NULL) {
1248                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1249                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1250                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1251                         break;
1252                 }
1253                 client = getclnthandle(host, nconf, NULL);
1254                 if (client)
1255                         break;
1256         }
1257         __rpc_endconf(handle);
1258         if (client == (CLIENT *) NULL) {
1259                 return (FALSE);
1260         }
1261
1262         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1263                 (xdrproc_t) xdr_void, NULL,
1264                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1265
1266         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1267                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1268                 if (vers == RPCBVERS4) {
1269                         /* fall back to earlier version */
1270                         vers = RPCBVERS;
1271                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1272                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1273                                 (xdrproc_t) xdr_void, NULL,
1274                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1275                                 tottimeout);
1276                 }
1277         }
1278         CLNT_DESTROY(client);
1279         return (st == RPC_SUCCESS? TRUE: FALSE);
1280 }
1281
1282 static bool_t
1283 xdr_netbuf(XDR *xdrs, struct netbuf *objp)
1284 {
1285         bool_t dummy;
1286         void **pp;
1287
1288         if (!xdr_uint32_t(xdrs, (uint32_t *) &objp->maxlen)) {
1289                 return (FALSE);
1290         }
1291         pp = &objp->buf;
1292
1293         if (objp->maxlen > RPC_MAXDATASIZE) {
1294                 return (FALSE);
1295         }
1296
1297         dummy = xdr_bytes(xdrs, (char **) pp,
1298                         (u_int *)&(objp->len), objp->maxlen);
1299         return (dummy);
1300 }
1301
1302 /*
1303  * Converts taddr to universal address.  This routine should never
1304  * really be called because local n2a libraries are always provided.
1305  */
1306 char *
1307 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1308 {
1309         CLIENT *client;
1310         char *uaddr = NULL;
1311
1312
1313         /* parameter checking */
1314         if (nconf == NULL) {
1315                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1316                 return (NULL);
1317         }
1318         if (taddr == NULL) {
1319                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1320                 return (NULL);
1321         }
1322         client = local_rpcb();
1323         if (! client) {
1324                 return (NULL);
1325         }
1326
1327         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1328             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1329             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1330         CLNT_DESTROY(client);
1331         return (uaddr);
1332 }
1333
1334 /*
1335  * Converts universal address to netbuf.  This routine should never
1336  * really be called because local n2a libraries are always provided.
1337  */
1338 struct netbuf *
1339 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1340 {
1341         CLIENT *client;
1342         struct netbuf *taddr;
1343
1344
1345         /* parameter checking */
1346         if (nconf == NULL) {
1347                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1348                 return (NULL);
1349         }
1350         if (uaddr == NULL) {
1351                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1352                 return (NULL);
1353         }
1354         client = local_rpcb();
1355         if (! client) {
1356                 return (NULL);
1357         }
1358
1359         taddr = (struct netbuf *)malloc(sizeof (struct netbuf), M_RPC, M_WAITOK|M_ZERO);
1360         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1361             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1362             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1363             tottimeout) != RPC_SUCCESS) {
1364                 free(taddr);
1365                 taddr = NULL;
1366         }
1367         CLNT_DESTROY(client);
1368         return (taddr);
1369 }
1370
1371 #endif