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                         endnetconfig(nc_handle);
 513                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 514                         mutex_unlock(&loopnconf_lock);
 515                         return (NULL);
 516                 }
 517                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 518                 /* loopnconf is never freed */
 519                 endnetconfig(nc_handle);
 520         }
 521         mutex_unlock(&loopnconf_lock);
 522         client = getclnthandle(hostname, loopnconf, NULL);
 523         return (client);
 524 }
 525
 526 /*
 527  * Set a mapping between program, version and address.
 528  * Calls the rpcbind service to do the mapping.
 529  */
 530 bool_t
 531 rpcb_set(program, version, nconf, address)
 532         rpcprog_t program;
 533         rpcvers_t version;
 534         const struct netconfig *nconf;  /* Network structure of transport */
 535         const struct netbuf *address;           /* Services netconfig address */
 536 {
 537         CLIENT *client;
 538         bool_t rslt = FALSE;
 539         RPCB parms;
 540         char uidbuf[32];
 541
 542         /* parameter checking */
 543         if (nconf == NULL) {
 544                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 545                 return (FALSE);
 546         }
 547         if (address == NULL) {
 548                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 549                 return (FALSE);
 550         }
 551         client = local_rpcb();
 552         if (! client) {
 553                 return (FALSE);
 554         }
 555
 556         /* convert to universal */
 557         /*LINTED const castaway*/
 558         parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
 559                                    (struct netbuf *)address);
 560         if (!parms.r_addr) {
 561                 CLNT_DESTROY(client);
 562                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 563                 return (FALSE); /* no universal address */
 564         }
 565         parms.r_prog = program;
 566         parms.r_vers = version;
 567         parms.r_netid = nconf->nc_netid;
 568         /*
 569          * Though uid is not being used directly, we still send it for
 570          * completeness.  For non-unix platforms, perhaps some other
 571          * string or an empty string can be sent.
 572          */
 573         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 574         parms.r_owner = uidbuf;
 575
 576         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 577             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 578             (char *)(void *)&rslt, tottimeout);
 579
 580         CLNT_DESTROY(client);
 581         free(parms.r_addr);
 582         return (rslt);
 583 }
 584
 585 /*
 586  * Remove the mapping between program, version and netbuf address.
 587  * Calls the rpcbind service to do the un-mapping.
 588  * If netbuf is NULL, unset for all the transports, otherwise unset
 589  * only for the given transport.
 590  */
 591 bool_t
 592 rpcb_unset(program, version, nconf)
 593         rpcprog_t program;
 594         rpcvers_t version;
 595         const struct netconfig *nconf;
 596 {
 597         CLIENT *client;
 598         bool_t rslt = FALSE;
 599         RPCB parms;
 600         char uidbuf[32];
 601
 602         client = local_rpcb();
 603         if (! client) {
 604                 return (FALSE);
 605         }
 606
 607         parms.r_prog = program;
 608         parms.r_vers = version;
 609         if (nconf)
 610                 parms.r_netid = nconf->nc_netid;
 611         else {
 612                 /*LINTED const castaway*/
 613                 parms.r_netid = (char *) &nullstring[0]; /* unsets  all */
 614         }
 615         /*LINTED const castaway*/
 616         parms.r_addr = (char *) &nullstring[0];
 617         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 618         parms.r_owner = uidbuf;
 619
 620         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 621             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 622             (char *)(void *)&rslt, tottimeout);
 623
 624         CLNT_DESTROY(client);
 625         return (rslt);
 626 }
 627
 628 /*
 629  * From the merged list, find the appropriate entry
 630  */
 631 static struct netbuf *
 632 got_entry(relp, nconf)
 633         rpcb_entry_list_ptr relp;
 634         const struct netconfig *nconf;
 635 {
 636         struct netbuf *na = NULL;
 637         rpcb_entry_list_ptr sp;
 638         rpcb_entry *rmap;
 639
 640         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 641                 rmap = &sp->rpcb_entry_map;
 642                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 643                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 644                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 645                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 646                         na = uaddr2taddr(nconf, rmap->r_maddr);
 647 #ifdef ND_DEBUG
 648                         fprintf(stderr, "\tRemote address is [%s].\n",
 649                                 rmap->r_maddr);
 650                         if (!na)
 651                                 fprintf(stderr,
 652                                     "\tCouldn't resolve remote address!\n");
 653 #endif
 654                         break;
 655                 }
 656         }
 657         return (na);
 658 }
 659
 660 /*
 661  * Quick check to see if rpcbind is up.  Tries to connect over
 662  * local transport.
 663  */
 664 static bool_t
 665 __rpcbind_is_up()
 666 {
 667         struct netconfig *nconf;
 668         struct sockaddr_un sun;
 669         void *localhandle;
 670         int sock;
 671
 672         nconf = NULL;
 673         localhandle = setnetconfig();
 674         while ((nconf = getnetconfig(localhandle)) != NULL) {
 675                 if (nconf->nc_protofmly != NULL &&
 676                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 677                          break;
 678         }
 679         endnetconfig(localhandle);
 680
 681         if (nconf == NULL)
 682                 return (FALSE);
 683
 684         memset(&sun, 0, sizeof sun);
 685         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 686         if (sock < 0)
 687                 return (FALSE);
 688         sun.sun_family = AF_LOCAL;
 689         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 690         sun.sun_len = SUN_LEN(&sun);
 691
 692         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 693                 _close(sock);
 694                 return (FALSE);
 695         }
 696
 697         _close(sock);
 698         return (TRUE);
 699 }
 700
 701 /*
 702  * An internal function which optimizes rpcb_getaddr function.  It also
 703  * returns the client handle that it uses to contact the remote rpcbind.
 704  *
 705  * The algorithm used: If the transports is TCP or UDP, it first tries
 706  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 707  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 708  * that time, version 4 would be available on many machines on the network.
 709  * With this algorithm, we get performance as well as a plan for
 710  * obsoleting version 2.
 711  *
 712  * For all other transports, the algorithm remains as 4 and then 3.
 713  *
 714  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 715  * handle for COTS cases and hence in these cases we do not return the
 716  * client handle.  This code will change if t_connect() ever
 717  * starts working properly.  Also look under clnt_vc.c.
 718  */
 719 struct netbuf *
 720 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
 721         rpcprog_t program;
 722         rpcvers_t version;
 723         const struct netconfig *nconf;
 724         const char *host;
 725         CLIENT **clpp;
 726         struct timeval *tp;
 727 {
 728         static bool_t check_rpcbind = TRUE;
 729         CLIENT *client = NULL;
 730         RPCB parms;
 731         enum clnt_stat clnt_st;
 732         char *ua = NULL;
 733         rpcvers_t vers;
 734         struct netbuf *address = NULL;
 735         rpcvers_t start_vers = RPCBVERS4;
 736         struct netbuf servaddr;
 737
 738         /* parameter checking */
 739         if (nconf == NULL) {
 740                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 741                 return (NULL);
 742         }
 743
 744         parms.r_addr = NULL;
 745
 746         /*
 747          * Use default total timeout if no timeout is specified.
 748          */
 749         if (tp == NULL)
 750                 tp = &tottimeout;
 751
 752 #ifdef PORTMAP
 753         /* Try version 2 for TCP or UDP */
 754         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 755                 u_short port = 0;
 756                 struct netbuf remote;
 757                 rpcvers_t pmapvers = 2;
 758                 struct pmap pmapparms;
 759
 760                 /*
 761                  * Try UDP only - there are some portmappers out
 762                  * there that use UDP only.
 763                  */
 764                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 765                         struct netconfig *newnconf;
 766
 767                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 768                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 769                                 return (NULL);
 770                         }
 771                         client = getclnthandle(host, newnconf, &parms.r_addr);
 772                         freenetconfigent(newnconf);
 773                 } else {
 774                         client = getclnthandle(host, nconf, &parms.r_addr);
 775                 }
 776                 if (client == NULL)
 777                         return (NULL);
 778
 779                 /*
 780                  * Set version and retry timeout.
 781                  */
 782                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 783                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 784
 785                 pmapparms.pm_prog = program;
 786                 pmapparms.pm_vers = version;
 787                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 788                                         IPPROTO_UDP : IPPROTO_TCP;
 789                 pmapparms.pm_port = 0;  /* not needed */
 790                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 791                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 792                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 793                     *tp);
 794                 if (clnt_st != RPC_SUCCESS) {
 795                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 796                                 (clnt_st == RPC_PROGUNAVAIL))
 797                                 goto try_rpcbind; /* Try different versions */
 798                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 799                         clnt_geterr(client, &rpc_createerr.cf_error);
 800                         goto error;
 801                 } else if (port == 0) {
 802                         address = NULL;
 803                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 804                         goto error;
 805                 }
 806                 port = htons(port);
 807                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 808                 if (((address = (struct netbuf *)
 809                         malloc(sizeof (struct netbuf))) == NULL) ||
 810                     ((address->buf = (char *)
 811                         malloc(remote.len)) == NULL)) {
 812                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 813                         clnt_geterr(client, &rpc_createerr.cf_error);
 814                         free(address);
 815                         address = NULL;
 816                         goto error;
 817                 }
 818                 memcpy(address->buf, remote.buf, remote.len);
 819                 memcpy(&((char *)address->buf)[sizeof (short)],
 820                                 (char *)(void *)&port, sizeof (short));
 821                 address->len = address->maxlen = remote.len;
 822                 goto done;
 823         }
 824 #endif                          /* PORTMAP */
 825
 826 try_rpcbind:
 827         /*
 828          * Check if rpcbind is up.  This prevents needless delays when
 829          * accessing applications such as the keyserver while booting
 830          * disklessly.
 831          */
 832         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 833                 if (!__rpcbind_is_up()) {
 834                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 835                         rpc_createerr.cf_error.re_errno = 0;
 836                         goto error;
 837                 }
 838                 check_rpcbind = FALSE;
 839         }
 840
 841         /*
 842          * Now we try version 4 and then 3.
 843          * We also send the remote system the address we used to
 844          * contact it in case it can help to connect back with us
 845          */
 846         parms.r_prog = program;
 847         parms.r_vers = version;
 848         /*LINTED const castaway*/
 849         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 850                                                         /* just for xdring */
 851         parms.r_netid = nconf->nc_netid; /* not really needed */
 852
 853         /*
 854          * If a COTS transport is being used, try getting address via CLTS
 855          * transport.  This works only with version 4.
 856          */
 857         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 858                         nconf->nc_semantics == NC_TPI_COTS) {
 859
 860                 void *handle;
 861                 struct netconfig *nconf_clts;
 862                 rpcb_entry_list_ptr relp = NULL;
 863
 864                 if (client == NULL) {
 865                         /* This did not go through the above PORTMAP/TCP code */
 866                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 867                                 while ((nconf_clts = __rpc_getconf(handle))
 868                                         != NULL) {
 869                                         if (strcmp(nconf_clts->nc_protofmly,
 870                                                 nconf->nc_protofmly) != 0) {
 871                                                 continue;
 872                                         }
 873                                         client = getclnthandle(host, nconf_clts,
 874                                                         &parms.r_addr);
 875                                         break;
 876                                 }
 877                                 __rpc_endconf(handle);
 878                         }
 879                         if (client == NULL)
 880                                 goto regular_rpcbind;   /* Go the regular way */
 881                 } else {
 882                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 883                         vers = RPCBVERS4;
 884                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 885                 }
 886                 /*
 887                  * We also send the remote system the address we used to
 888                  * contact it in case it can help it connect back with us
 889                  */
 890                 if (parms.r_addr == NULL) {
 891                         /*LINTED const castaway*/
 892                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 893                 }
 894
 895                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 896
 897                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 898                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 899                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 900                     (char *)(void *)&relp, *tp);
 901                 if (clnt_st == RPC_SUCCESS) {
 902                         if ((address = got_entry(relp, nconf)) != NULL) {
 903                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 904                                     (char *)(void *)&relp);
 905                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 906                                         (char *)(void *)&servaddr);
 907                                 __rpc_fixup_addr(address, &servaddr);
 908                                 goto done;
 909                         }
 910                         /* Entry not found for this transport */
 911                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 912                             (char *)(void *)&relp);
 913                         /*
 914                          * XXX: should have perhaps returned with error but
 915                          * since the remote machine might not always be able
 916                          * to send the address on all transports, we try the
 917                          * regular way with regular_rpcbind
 918                          */
 919                         goto regular_rpcbind;
 920                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 921                         (clnt_st == RPC_PROGUNAVAIL)) {
 922                         start_vers = RPCBVERS;  /* Try version 3 now */
 923                         goto regular_rpcbind; /* Try different versions */
 924                 } else {
 925                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 926                         clnt_geterr(client, &rpc_createerr.cf_error);
 927                         goto error;
 928                 }
 929         }
 930
 931 regular_rpcbind:
 932
 933         /* Now the same transport is to be used to get the address */
 934         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 935                         (nconf->nc_semantics == NC_TPI_COTS))) {
 936                 /* A CLTS type of client - destroy it */
 937                 CLNT_DESTROY(client);
 938                 client = NULL;
 939         }
 940
 941         if (client == NULL) {
 942                 client = getclnthandle(host, nconf, &parms.r_addr);
 943                 if (client == NULL) {
 944                         goto error;
 945                 }
 946         }
 947         if (parms.r_addr == NULL) {
 948                 /*LINTED const castaway*/
 949                 parms.r_addr = (char *) &nullstring[0];
 950         }
 951
 952         /* First try from start_vers and then version 3 (RPCBVERS) */
 953
 954         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 955         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 956                 /* Set the version */
 957                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 958                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 959                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 960                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 961                 if (clnt_st == RPC_SUCCESS) {
 962                         if ((ua == NULL) || (ua[0] == 0)) {
 963                                 /* address unknown */
 964                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 965                                 goto error;
 966                         }
 967                         address = uaddr2taddr(nconf, ua);
 968 #ifdef ND_DEBUG
 969                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 970                         if (!address)
 971                                 fprintf(stderr,
 972                                         "\tCouldn't resolve remote address!\n");
 973 #endif
 974                         xdr_free((xdrproc_t)xdr_wrapstring,
 975                             (char *)(void *)&ua);
 976
 977                         if (! address) {
 978                                 /* We don't know about your universal address */
 979                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 980                                 goto error;
 981                         }
 982                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
 983                             (char *)(void *)&servaddr);
 984                         __rpc_fixup_addr(address, &servaddr);
 985                         goto done;
 986                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
 987                         struct rpc_err rpcerr;
 988
 989                         clnt_geterr(client, &rpcerr);
 990                         if (rpcerr.re_vers.low > RPCBVERS4)
 991                                 goto error;  /* a new version, can't handle */
 992                 } else if (clnt_st != RPC_PROGUNAVAIL) {
 993                         /* Cant handle this error */
 994                         rpc_createerr.cf_stat = clnt_st;
 995                         clnt_geterr(client, &rpc_createerr.cf_error);
 996                         goto error;
 997                 }
 998         }
 999
1000 error:
1001         if (client) {
1002                 CLNT_DESTROY(client);
1003                 client = NULL;
1004         }
1005 done:
1006         if (nconf->nc_semantics != NC_TPI_CLTS) {
1007                 /* This client is the connectionless one */
1008                 if (client) {
1009                         CLNT_DESTROY(client);
1010                         client = NULL;
1011                 }
1012         }
1013         if (clpp) {
1014                 *clpp = client;
1015         } else if (client) {
1016                 CLNT_DESTROY(client);
1017         }
1018         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1019                 free(parms.r_addr);
1020         return (address);
1021 }
1022
1023
1024 /*
1025  * Find the mapped address for program, version.
1026  * Calls the rpcbind service remotely to do the lookup.
1027  * Uses the transport specified in nconf.
1028  * Returns FALSE (0) if no map exists, else returns 1.
1029  *
1030  * Assuming that the address is all properly allocated
1031  */
1032 int
1033 rpcb_getaddr(program, version, nconf, address, host)
1034         rpcprog_t program;
1035         rpcvers_t version;
1036         const struct netconfig *nconf;
1037         struct netbuf *address;
1038         const char *host;
1039 {
1040         struct netbuf *na;
1041
1042         if ((na = __rpcb_findaddr_timed(program, version,
1043             (struct netconfig *) nconf, (char *) host,
1044             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1045                 return (FALSE);
1046
1047         if (na->len > address->maxlen) {
1048                 /* Too long address */
1049                 free(na->buf);
1050                 free(na);
1051                 rpc_createerr.cf_stat = RPC_FAILED;
1052                 return (FALSE);
1053         }
1054         memcpy(address->buf, na->buf, (size_t)na->len);
1055         address->len = na->len;
1056         free(na->buf);
1057         free(na);
1058         return (TRUE);
1059 }
1060
1061 /*
1062  * Get a copy of the current maps.
1063  * Calls the rpcbind service remotely to get the maps.
1064  *
1065  * It returns only a list of the services
1066  * It returns NULL on failure.
1067  */
1068 rpcblist *
1069 rpcb_getmaps(nconf, host)
1070         const struct netconfig *nconf;
1071         const char *host;
1072 {
1073         rpcblist_ptr head = NULL;
1074         CLIENT *client;
1075         enum clnt_stat clnt_st;
1076         rpcvers_t vers = 0;
1077
1078         client = getclnthandle(host, nconf, NULL);
1079         if (client == NULL) {
1080                 return (head);
1081         }
1082         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1083             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1084             (char *)(void *)&head, tottimeout);
1085         if (clnt_st == RPC_SUCCESS)
1086                 goto done;
1087
1088         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1089             (clnt_st != RPC_PROGUNAVAIL)) {
1090                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1091                 clnt_geterr(client, &rpc_createerr.cf_error);
1092                 goto done;
1093         }
1094
1095         /* fall back to earlier version */
1096         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1097         if (vers == RPCBVERS4) {
1098                 vers = RPCBVERS;
1099                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1100                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1101                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1102                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1103                         goto done;
1104         }
1105         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1106         clnt_geterr(client, &rpc_createerr.cf_error);
1107
1108 done:
1109         CLNT_DESTROY(client);
1110         return (head);
1111 }
1112
1113 /*
1114  * rpcbinder remote-call-service interface.
1115  * This routine is used to call the rpcbind remote call service
1116  * which will look up a service program in the address maps, and then
1117  * remotely call that routine with the given parameters. This allows
1118  * programs to do a lookup and call in one step.
1119 */
1120 enum clnt_stat
1121 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1122                 xdrres, resp, tout, addr_ptr)
1123         const struct netconfig *nconf;  /* Netconfig structure */
1124         const char *host;                       /* Remote host name */
1125         rpcprog_t prog;
1126         rpcvers_t vers;
1127         rpcproc_t proc;                 /* Remote proc identifiers */
1128         xdrproc_t xdrargs, xdrres;      /* XDR routines */
1129         caddr_t argsp, resp;            /* Argument and Result */
1130         struct timeval tout;            /* Timeout value for this call */
1131         const struct netbuf *addr_ptr;  /* Preallocated netbuf address */
1132 {
1133         CLIENT *client;
1134         enum clnt_stat stat;
1135         struct r_rpcb_rmtcallargs a;
1136         struct r_rpcb_rmtcallres r;
1137         rpcvers_t rpcb_vers;
1138
1139         stat = 0;
1140         client = getclnthandle(host, nconf, NULL);
1141         if (client == NULL) {
1142                 return (RPC_FAILED);
1143         }
1144         /*LINTED const castaway*/
1145         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1146         a.prog = prog;
1147         a.vers = vers;
1148         a.proc = proc;
1149         a.args.args_val = argsp;
1150         a.xdr_args = xdrargs;
1151         r.addr = NULL;
1152         r.results.results_val = resp;
1153         r.xdr_res = xdrres;
1154
1155         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1156                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1157                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1158                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1159                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1160                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1161                         struct netbuf *na;
1162                         /*LINTED const castaway*/
1163                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1164                         if (!na) {
1165                                 stat = RPC_N2AXLATEFAILURE;
1166                                 /*LINTED const castaway*/
1167                                 ((struct netbuf *) addr_ptr)->len = 0;
1168                                 goto error;
1169                         }
1170                         if (na->len > addr_ptr->maxlen) {
1171                                 /* Too long address */
1172                                 stat = RPC_FAILED; /* XXX A better error no */
1173                                 free(na->buf);
1174                                 free(na);
1175                                 /*LINTED const castaway*/
1176                                 ((struct netbuf *) addr_ptr)->len = 0;
1177                                 goto error;
1178                         }
1179                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1180                         /*LINTED const castaway*/
1181                         ((struct netbuf *)addr_ptr)->len = na->len;
1182                         free(na->buf);
1183                         free(na);
1184                         break;
1185                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1186                             (stat != RPC_PROGUNAVAIL)) {
1187                         goto error;
1188                 }
1189         }
1190 error:
1191         CLNT_DESTROY(client);
1192         if (r.addr)
1193                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1194         return (stat);
1195 }
1196
1197 /*
1198  * Gets the time on the remote host.
1199  * Returns 1 if succeeds else 0.
1200  */
1201 bool_t
1202 rpcb_gettime(host, timep)
1203         const char *host;
1204         time_t *timep;
1205 {
1206         CLIENT *client = NULL;
1207         void *handle;
1208         struct netconfig *nconf;
1209         rpcvers_t vers;
1210         enum clnt_stat st;
1211
1212
1213         if ((host == NULL) || (host[0] == 0)) {
1214                 time(timep);
1215                 return (TRUE);
1216         }
1217
1218         if ((handle = __rpc_setconf("netpath")) == NULL) {
1219                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1220                 return (FALSE);
1221         }
1222         rpc_createerr.cf_stat = RPC_SUCCESS;
1223         while (client == NULL) {
1224                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1225                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1226                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1227                         break;
1228                 }
1229                 client = getclnthandle(host, nconf, NULL);
1230                 if (client)
1231                         break;
1232         }
1233         __rpc_endconf(handle);
1234         if (client == (CLIENT *) NULL) {
1235                 return (FALSE);
1236         }
1237
1238         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1239                 (xdrproc_t) xdr_void, NULL,
1240                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1241
1242         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1243                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1244                 if (vers == RPCBVERS4) {
1245                         /* fall back to earlier version */
1246                         vers = RPCBVERS;
1247                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1248                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1249                                 (xdrproc_t) xdr_void, NULL,
1250                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1251                                 tottimeout);
1252                 }
1253         }
1254         CLNT_DESTROY(client);
1255         return (st == RPC_SUCCESS? TRUE: FALSE);
1256 }
1257
1258 /*
1259  * Converts taddr to universal address.  This routine should never
1260  * really be called because local n2a libraries are always provided.
1261  */
1262 char *
1263 rpcb_taddr2uaddr(nconf, taddr)
1264         struct netconfig *nconf;
1265         struct netbuf *taddr;
1266 {
1267         CLIENT *client;
1268         char *uaddr = NULL;
1269
1270
1271         /* parameter checking */
1272         if (nconf == NULL) {
1273                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1274                 return (NULL);
1275         }
1276         if (taddr == NULL) {
1277                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1278                 return (NULL);
1279         }
1280         client = local_rpcb();
1281         if (! client) {
1282                 return (NULL);
1283         }
1284
1285         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1286             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1287             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1288         CLNT_DESTROY(client);
1289         return (uaddr);
1290 }
1291
1292 /*
1293  * Converts universal address to netbuf.  This routine should never
1294  * really be called because local n2a libraries are always provided.
1295  */
1296 struct netbuf *
1297 rpcb_uaddr2taddr(nconf, uaddr)
1298         struct netconfig *nconf;
1299         char *uaddr;
1300 {
1301         CLIENT *client;
1302         struct netbuf *taddr;
1303
1304
1305         /* parameter checking */
1306         if (nconf == NULL) {
1307                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1308                 return (NULL);
1309         }
1310         if (uaddr == NULL) {
1311                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1312                 return (NULL);
1313         }
1314         client = local_rpcb();
1315         if (! client) {
1316                 return (NULL);
1317         }
1318
1319         taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1320         if (taddr == NULL) {
1321                 CLNT_DESTROY(client);
1322                 return (NULL);
1323         }
1324         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1325             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1326             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1327             tottimeout) != RPC_SUCCESS) {
1328                 free(taddr);
1329                 taddr = NULL;
1330         }
1331         CLNT_DESTROY(client);
1332         return (taddr);
1333 }