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