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  * The contents of this file are subject to the Sun Standards
   5  * License Version 1.0 the (the "License";) You may not use
   6  * this file except in compliance with the License.  You may
   7  * obtain a copy of the License at lib/libc/rpc/LICENSE
   8  *
   9  * Software distributed under the License is distributed on
  10  * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
  11  * express or implied.  See the License for the specific
  12  * language governing rights and limitations under the License.
  13  *
  14  * The Original Code is Copyright 1998 by Sun Microsystems, Inc
  15  *
  16  * The Initial Developer of the Original Code is:  Sun
  17  * Microsystems, Inc.
  18  *
  19  * All Rights Reserved.
  20  *
  21  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  22  * unrestricted use provided that this legend is included on all tape
  23  * media and as a part of the software program in whole or part.  Users
  24  * may copy or modify Sun RPC without charge, but are not authorized
  25  * to license or distribute it to anyone else except as part of a product or
  26  * program developed by the user.
  27  *
  28  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  29  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  30  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  31  *
  32  * Sun RPC is provided with no support and without any obligation on the
  33  * part of Sun Microsystems, Inc. to assist in its use, correction,
  34  * modification or enhancement.
  35  *
  36  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  37  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  38  * OR ANY PART THEREOF.
  39  *
  40  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  41  * or profits or other special, indirect and consequential damages, even if
  42  * Sun has been advised of the possibility of such damages.
  43  *
  44  * Sun Microsystems, Inc.
  45  * 2550 Garcia Avenue
  46  * Mountain View, California  94043
  47  */
  48 /*
  49  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  50  */
  51
  52 /* #ident       "@(#)rpcb_clnt.c        1.27    94/04/24 SMI" */
  53
  54
  55 #if defined(LIBC_SCCS) && !defined(lint)
  56 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
  57 #endif
  58 #include <sys/cdefs.h>
  59 __FBSDID("$FreeBSD$");
  60
  61 /*
  62  * rpcb_clnt.c
  63  * interface to rpcbind rpc service.
  64  *
  65  * Copyright (C) 1988, Sun Microsystems, Inc.
  66  */
  67
  68 #include "namespace.h"
  69 #include "reentrant.h"
  70 #include <sys/types.h>
  71 #include <sys/socket.h>
  72 #include <sys/un.h>
  73 #include <sys/utsname.h>
  74 #include <rpc/rpc.h>
  75 #include <rpc/rpcb_prot.h>
  76 #include <rpc/nettype.h>
  77 #include <netconfig.h>
  78 #ifdef PORTMAP
  79 #include <netinet/in.h>         /* FOR IPPROTO_TCP/UDP definitions */
  80 #include <rpc/pmap_prot.h>
  81 #endif                          /* PORTMAP */
  82 #include <stdio.h>
  83 #include <errno.h>
  84 #include <stdlib.h>
  85 #include <string.h>
  86 #include <unistd.h>
  87 #include <netdb.h>
  88 #include <syslog.h>
  89 #include "un-namespace.h"
  90
  91 #include "rpc_com.h"
  92 #include "mt_misc.h"
  93
  94 static struct timeval tottimeout = { 60, 0 };
  95 static const struct timeval rmttimeout = { 3, 0 };
  96 static struct timeval rpcbrmttime = { 15, 0 };
  97
  98 extern bool_t xdr_wrapstring(XDR *, char **);
  99
 100 static const char nullstring[] = "\000";
 101
 102 #define CACHESIZE 6
 103
 104 struct address_cache {
 105         char *ac_host;
 106         char *ac_netid;
 107         char *ac_uaddr;
 108         struct netbuf *ac_taddr;
 109         struct address_cache *ac_next;
 110 };
 111
 112 static struct address_cache *front;
 113 static int cachesize;
 114
 115 #define CLCR_GET_RPCB_TIMEOUT   1
 116 #define CLCR_SET_RPCB_TIMEOUT   2
 117
 118
 119 extern int __rpc_lowvers;
 120
 121 static struct address_cache *check_cache(const char *, const char *);
 122 static void delete_cache(struct netbuf *);
 123 static void add_cache(const char *, const char *, struct netbuf *, char *);
 124 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
 125 static CLIENT *local_rpcb(void);
 126 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
 127
 128 /*
 129  * This routine adjusts the timeout used for calls to the remote rpcbind.
 130  * Also, this routine can be used to set the use of portmapper version 2
 131  * only when doing rpc_broadcasts
 132  * These are private routines that may not be provided in future releases.
 133  */
 134 bool_t
 135 __rpc_control(request, info)
 136         int     request;
 137         void    *info;
 138 {
 139         switch (request) {
 140         case CLCR_GET_RPCB_TIMEOUT:
 141                 *(struct timeval *)info = tottimeout;
 142                 break;
 143         case CLCR_SET_RPCB_TIMEOUT:
 144                 tottimeout = *(struct timeval *)info;
 145                 break;
 146         case CLCR_SET_LOWVERS:
 147                 __rpc_lowvers = *(int *)info;
 148                 break;
 149         case CLCR_GET_LOWVERS:
 150                 *(int *)info = __rpc_lowvers;
 151                 break;
 152         default:
 153                 return (FALSE);
 154         }
 155         return (TRUE);
 156 }
 157
 158 /*
 159  *      It might seem that a reader/writer lock would be more reasonable here.
 160  *      However because getclnthandle(), the only user of the cache functions,
 161  *      may do a delete_cache() operation if a check_cache() fails to return an
 162  *      address useful to clnt_tli_create(), we may as well use a mutex.
 163  */
 164 /*
 165  * As it turns out, if the cache lock is *not* a reader/writer lock, we will
 166  * block all clnt_create's if we are trying to connect to a host that's down,
 167  * since the lock will be held all during that time.
 168  */
 169
 170 /*
 171  * The routines check_cache(), add_cache(), delete_cache() manage the
 172  * cache of rpcbind addresses for (host, netid).
 173  */
 174
 175 static struct address_cache *
 176 check_cache(host, netid)
 177         const char *host, *netid;
 178 {
 179         struct address_cache *cptr;
 180
 181         /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 182
 183         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 184                 if (!strcmp(cptr->ac_host, host) &&
 185                     !strcmp(cptr->ac_netid, netid)) {
 186 #ifdef ND_DEBUG
 187                         fprintf(stderr, "Found cache entry for %s: %s\n",
 188                                 host, netid);
 189 #endif
 190                         return (cptr);
 191                 }
 192         }
 193         return ((struct address_cache *) NULL);
 194 }
 195
 196 static void
 197 delete_cache(addr)
 198         struct netbuf *addr;
 199 {
 200         struct address_cache *cptr, *prevptr = NULL;
 201
 202         /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 203         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 204                 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
 205                         free(cptr->ac_host);
 206                         free(cptr->ac_netid);
 207                         free(cptr->ac_taddr->buf);
 208                         free(cptr->ac_taddr);
 209                         if (cptr->ac_uaddr)
 210                                 free(cptr->ac_uaddr);
 211                         if (prevptr)
 212                                 prevptr->ac_next = cptr->ac_next;
 213                         else
 214                                 front = cptr->ac_next;
 215                         free(cptr);
 216                         cachesize--;
 217                         break;
 218                 }
 219                 prevptr = cptr;
 220         }
 221 }
 222
 223 static void
 224 add_cache(host, netid, taddr, uaddr)
 225         const char *host, *netid;
 226         char *uaddr;
 227         struct netbuf *taddr;
 228 {
 229         struct address_cache  *ad_cache, *cptr, *prevptr;
 230
 231         ad_cache = (struct address_cache *)
 232                         malloc(sizeof (struct address_cache));
 233         if (!ad_cache) {
 234                 return;
 235         }
 236         ad_cache->ac_host = strdup(host);
 237         ad_cache->ac_netid = strdup(netid);
 238         ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
 239         ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
 240         if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
 241                 (uaddr && !ad_cache->ac_uaddr)) {
 242                 return;
 243         }
 244         ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
 245         ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
 246         if (ad_cache->ac_taddr->buf == NULL) {
 247                 return;
 248         }
 249         memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
 250 #ifdef ND_DEBUG
 251         fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
 252 #endif
 253
 254 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  cptr */
 255
 256         rwlock_wrlock(&rpcbaddr_cache_lock);
 257         if (cachesize < CACHESIZE) {
 258                 ad_cache->ac_next = front;
 259                 front = ad_cache;
 260                 cachesize++;
 261         } else {
 262                 /* Free the last entry */
 263                 cptr = front;
 264                 prevptr = NULL;
 265                 while (cptr->ac_next) {
 266                         prevptr = cptr;
 267                         cptr = cptr->ac_next;
 268                 }
 269
 270 #ifdef ND_DEBUG
 271                 fprintf(stderr, "Deleted from cache: %s : %s\n",
 272                         cptr->ac_host, cptr->ac_netid);
 273 #endif
 274                 free(cptr->ac_host);
 275                 free(cptr->ac_netid);
 276                 free(cptr->ac_taddr->buf);
 277                 free(cptr->ac_taddr);
 278                 if (cptr->ac_uaddr)
 279                         free(cptr->ac_uaddr);
 280
 281                 if (prevptr) {
 282                         prevptr->ac_next = NULL;
 283                         ad_cache->ac_next = front;
 284                         front = ad_cache;
 285                 } else {
 286                         front = ad_cache;
 287                         ad_cache->ac_next = NULL;
 288                 }
 289                 free(cptr);
 290         }
 291         rwlock_unlock(&rpcbaddr_cache_lock);
 292 }
 293
 294 /*
 295  * This routine will return a client handle that is connected to the
 296  * rpcbind. If targaddr is non-NULL, the "universal address" of the
 297  * host will be stored in *targaddr; the caller is responsible for
 298  * freeing this string.
 299  * On error, returns NULL and free's everything.
 300  */
 301 static CLIENT *
 302 getclnthandle(host, nconf, targaddr)
 303         const char *host;
 304         const struct netconfig *nconf;
 305         char **targaddr;
 306 {
 307         CLIENT *client;
 308         struct netbuf *addr, taddr;
 309         struct netbuf addr_to_delete;
 310         struct __rpc_sockinfo si;
 311         struct addrinfo hints, *res, *tres;
 312         struct address_cache *ad_cache;
 313         char *tmpaddr;
 314
 315 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  ad_cache */
 316
 317         /* Get the address of the rpcbind.  Check cache first */
 318         client = NULL;
 319         addr_to_delete.len = 0;
 320         rwlock_rdlock(&rpcbaddr_cache_lock);
 321         ad_cache = NULL;
 322         if (host != NULL)
 323                 ad_cache = check_cache(host, nconf->nc_netid);
 324         if (ad_cache != NULL) {
 325                 addr = ad_cache->ac_taddr;
 326                 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
 327                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 328                 if (client != NULL) {
 329                         if (targaddr)
 330                                 *targaddr = strdup(ad_cache->ac_uaddr);
 331                         rwlock_unlock(&rpcbaddr_cache_lock);
 332                         return (client);
 333                 }
 334                 addr_to_delete.len = addr->len;
 335                 addr_to_delete.buf = (char *)malloc(addr->len);
 336                 if (addr_to_delete.buf == NULL) {
 337                         addr_to_delete.len = 0;
 338                 } else {
 339                         memcpy(addr_to_delete.buf, addr->buf, addr->len);
 340                 }
 341         }
 342         rwlock_unlock(&rpcbaddr_cache_lock);
 343         if (addr_to_delete.len != 0) {
 344                 /*
 345                  * Assume this may be due to cache data being
 346                  *  outdated
 347                  */
 348                 rwlock_wrlock(&rpcbaddr_cache_lock);
 349                 delete_cache(&addr_to_delete);
 350                 rwlock_unlock(&rpcbaddr_cache_lock);
 351                 free(addr_to_delete.buf);
 352         }
 353         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 354                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 355                 return NULL;
 356         }
 357
 358         memset(&hints, 0, sizeof hints);
 359         hints.ai_family = si.si_af;
 360         hints.ai_socktype = si.si_socktype;
 361         hints.ai_protocol = si.si_proto;
 362
 363 #ifdef CLNT_DEBUG
 364         printf("trying netid %s family %d proto %d socktype %d\n",
 365             nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
 366 #endif
 367
 368         if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 369                 client = local_rpcb();
 370                 if (! client) {
 371 #ifdef ND_DEBUG
 372                         clnt_pcreateerror("rpcbind clnt interface");
 373 #endif
 374                         return (NULL);
 375                 } else {
 376                         struct sockaddr_un sun;
 377
 378                         *targaddr = malloc(sizeof(sun.sun_path));
 379                         strncpy(*targaddr, _PATH_RPCBINDSOCK,
 380                             sizeof(sun.sun_path));
 381                         return (client);
 382                 }
 383         } else {
 384                 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
 385                         rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
 386                         return NULL;
 387                 }
 388         }
 389
 390         for (tres = res; tres != NULL; tres = tres->ai_next) {
 391                 taddr.buf = tres->ai_addr;
 392                 taddr.len = taddr.maxlen = tres->ai_addrlen;
 393
 394 #ifdef ND_DEBUG
 395                 {
 396                         char *ua;
 397
 398                         ua = taddr2uaddr(nconf, &taddr);
 399                         fprintf(stderr, "Got it [%s]\n", ua);
 400                         free(ua);
 401                 }
 402 #endif
 403
 404 #ifdef ND_DEBUG
 405                 {
 406                         int i;
 407
 408                         fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
 409                                 taddr.len, taddr.maxlen);
 410                         fprintf(stderr, "\tAddress is ");
 411                         for (i = 0; i < taddr.len; i++)
 412                                 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
 413                         fprintf(stderr, "\n");
 414                 }
 415 #endif
 416                 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
 417                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 418 #ifdef ND_DEBUG
 419                 if (! client) {
 420                         clnt_pcreateerror("rpcbind clnt interface");
 421                 }
 422 #endif
 423
 424                 if (client) {
 425                         tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
 426                         add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
 427                         if (targaddr)
 428                                 *targaddr = tmpaddr;
 429                         break;
 430                 }
 431         }
 432         if (res)
 433                 freeaddrinfo(res);
 434         return (client);
 435 }
 436
 437 /* XXX */
 438 #define IN4_LOCALHOST_STRING    "127.0.0.1"
 439 #define IN6_LOCALHOST_STRING    "::1"
 440
 441 /*
 442  * This routine will return a client handle that is connected to the local
 443  * rpcbind. Returns NULL on error and free's everything.
 444  */
 445 static CLIENT *
 446 local_rpcb()
 447 {
 448         CLIENT *client;
 449         static struct netconfig *loopnconf;
 450         static char *hostname;
 451         int sock;
 452         size_t tsize;
 453         struct netbuf nbuf;
 454         struct sockaddr_un sun;
 455
 456         /*
 457          * Try connecting to the local rpcbind through a local socket
 458          * first. If this doesn't work, try all transports defined in
 459          * the netconfig file.
 460          */
 461         memset(&sun, 0, sizeof sun);
 462         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 463         if (sock < 0)
 464                 goto try_nconf;
 465         sun.sun_family = AF_LOCAL;
 466         strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 467         nbuf.len = sun.sun_len = SUN_LEN(&sun);
 468         nbuf.maxlen = sizeof (struct sockaddr_un);
 469         nbuf.buf = &sun;
 470
 471         tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
 472         client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
 473             (rpcvers_t)RPCBVERS, tsize, tsize);
 474
 475         if (client != NULL) {
 476                 /* Mark the socket to be closed in destructor */
 477                 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
 478                 return client;
 479         }
 480
 481         /* Nobody needs this socket anymore; free the descriptor. */
 482         _close(sock);
 483
 484 try_nconf:
 485
 486 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
 487         mutex_lock(&loopnconf_lock);
 488         if (loopnconf == NULL) {
 489                 struct netconfig *nconf, *tmpnconf = NULL;
 490                 void *nc_handle;
 491                 int fd;
 492
 493                 nc_handle = setnetconfig();
 494                 if (nc_handle == NULL) {
 495                         /* fails to open netconfig file */
 496                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 497                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 498                         mutex_unlock(&loopnconf_lock);
 499                         return (NULL);
 500                 }
 501                 while ((nconf = getnetconfig(nc_handle)) != NULL) {
 502 #ifdef INET6
 503                         if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
 504 #else
 505                         if ((
 506 #endif
 507                              strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
 508                             (nconf->nc_semantics == NC_TPI_COTS ||
 509                              nconf->nc_semantics == NC_TPI_COTS_ORD)) {
 510                                 fd = __rpc_nconf2fd(nconf);
 511                                 /*
 512                                  * Can't create a socket, assume that
 513                                  * this family isn't configured in the kernel.
 514                                  */
 515                                 if (fd < 0)
 516                                         continue;
 517                                 _close(fd);
 518                                 tmpnconf = nconf;
 519                                 if (!strcmp(nconf->nc_protofmly, NC_INET))
 520                                         hostname = IN4_LOCALHOST_STRING;
 521                                 else
 522                                         hostname = IN6_LOCALHOST_STRING;
 523                         }
 524                 }
 525                 if (tmpnconf == NULL) {
 526                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 527                         mutex_unlock(&loopnconf_lock);
 528                         return (NULL);
 529                 }
 530                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 531                 /* loopnconf is never freed */
 532                 endnetconfig(nc_handle);
 533         }
 534         mutex_unlock(&loopnconf_lock);
 535         client = getclnthandle(hostname, loopnconf, NULL);
 536         return (client);
 537 }
 538
 539 /*
 540  * Set a mapping between program, version and address.
 541  * Calls the rpcbind service to do the mapping.
 542  */
 543 bool_t
 544 rpcb_set(program, version, nconf, address)
 545         rpcprog_t program;
 546         rpcvers_t version;
 547         const struct netconfig *nconf;  /* Network structure of transport */
 548         const struct netbuf *address;           /* Services netconfig address */
 549 {
 550         CLIENT *client;
 551         bool_t rslt = FALSE;
 552         RPCB parms;
 553         char uidbuf[32];
 554
 555         /* parameter checking */
 556         if (nconf == NULL) {
 557                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 558                 return (FALSE);
 559         }
 560         if (address == NULL) {
 561                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 562                 return (FALSE);
 563         }
 564         client = local_rpcb();
 565         if (! client) {
 566                 return (FALSE);
 567         }
 568
 569         /* convert to universal */
 570         /*LINTED const castaway*/
 571         parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
 572                                    (struct netbuf *)address);
 573         if (!parms.r_addr) {
 574                 CLNT_DESTROY(client);
 575                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 576                 return (FALSE); /* no universal address */
 577         }
 578         parms.r_prog = program;
 579         parms.r_vers = version;
 580         parms.r_netid = nconf->nc_netid;
 581         /*
 582          * Though uid is not being used directly, we still send it for
 583          * completeness.  For non-unix platforms, perhaps some other
 584          * string or an empty string can be sent.
 585          */
 586         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 587         parms.r_owner = uidbuf;
 588
 589         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 590             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 591             (char *)(void *)&rslt, tottimeout);
 592
 593         CLNT_DESTROY(client);
 594         free(parms.r_addr);
 595         return (rslt);
 596 }
 597
 598 /*
 599  * Remove the mapping between program, version and netbuf address.
 600  * Calls the rpcbind service to do the un-mapping.
 601  * If netbuf is NULL, unset for all the transports, otherwise unset
 602  * only for the given transport.
 603  */
 604 bool_t
 605 rpcb_unset(program, version, nconf)
 606         rpcprog_t program;
 607         rpcvers_t version;
 608         const struct netconfig *nconf;
 609 {
 610         CLIENT *client;
 611         bool_t rslt = FALSE;
 612         RPCB parms;
 613         char uidbuf[32];
 614
 615         client = local_rpcb();
 616         if (! client) {
 617                 return (FALSE);
 618         }
 619
 620         parms.r_prog = program;
 621         parms.r_vers = version;
 622         if (nconf)
 623                 parms.r_netid = nconf->nc_netid;
 624         else {
 625                 /*LINTED const castaway*/
 626                 parms.r_netid = (char *) &nullstring[0]; /* unsets  all */
 627         }
 628         /*LINTED const castaway*/
 629         parms.r_addr = (char *) &nullstring[0];
 630         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 631         parms.r_owner = uidbuf;
 632
 633         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 634             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 635             (char *)(void *)&rslt, tottimeout);
 636
 637         CLNT_DESTROY(client);
 638         return (rslt);
 639 }
 640
 641 /*
 642  * From the merged list, find the appropriate entry
 643  */
 644 static struct netbuf *
 645 got_entry(relp, nconf)
 646         rpcb_entry_list_ptr relp;
 647         const struct netconfig *nconf;
 648 {
 649         struct netbuf *na = NULL;
 650         rpcb_entry_list_ptr sp;
 651         rpcb_entry *rmap;
 652
 653         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 654                 rmap = &sp->rpcb_entry_map;
 655                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 656                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 657                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 658                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 659                         na = uaddr2taddr(nconf, rmap->r_maddr);
 660 #ifdef ND_DEBUG
 661                         fprintf(stderr, "\tRemote address is [%s].\n",
 662                                 rmap->r_maddr);
 663                         if (!na)
 664                                 fprintf(stderr,
 665                                     "\tCouldn't resolve remote address!\n");
 666 #endif
 667                         break;
 668                 }
 669         }
 670         return (na);
 671 }
 672
 673 /*
 674  * Quick check to see if rpcbind is up.  Tries to connect over
 675  * local transport.
 676  */
 677 static bool_t
 678 __rpcbind_is_up()
 679 {
 680         struct netconfig *nconf;
 681         struct sockaddr_un sun;
 682         void *localhandle;
 683         int sock;
 684
 685         nconf = NULL;
 686         localhandle = setnetconfig();
 687         while ((nconf = getnetconfig(localhandle)) != NULL) {
 688                 if (nconf->nc_protofmly != NULL &&
 689                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 690                          break;
 691         }
 692         if (nconf == NULL)
 693                 return (FALSE);
 694
 695         endnetconfig(localhandle);
 696
 697         memset(&sun, 0, sizeof sun);
 698         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 699         if (sock < 0)
 700                 return (FALSE);
 701         sun.sun_family = AF_LOCAL;
 702         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 703         sun.sun_len = SUN_LEN(&sun);
 704
 705         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 706                 _close(sock);
 707                 return (FALSE);
 708         }
 709
 710         _close(sock);
 711         return (TRUE);
 712 }
 713
 714 /*
 715  * An internal function which optimizes rpcb_getaddr function.  It also
 716  * returns the client handle that it uses to contact the remote rpcbind.
 717  *
 718  * The algorithm used: If the transports is TCP or UDP, it first tries
 719  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 720  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 721  * that time, version 4 would be available on many machines on the network.
 722  * With this algorithm, we get performance as well as a plan for
 723  * obsoleting version 2.
 724  *
 725  * For all other transports, the algorithm remains as 4 and then 3.
 726  *
 727  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 728  * handle for COTS cases and hence in these cases we do not return the
 729  * client handle.  This code will change if t_connect() ever
 730  * starts working properly.  Also look under clnt_vc.c.
 731  */
 732 struct netbuf *
 733 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
 734         rpcprog_t program;
 735         rpcvers_t version;
 736         const struct netconfig *nconf;
 737         const char *host;
 738         CLIENT **clpp;
 739         struct timeval *tp;
 740 {
 741         static bool_t check_rpcbind = TRUE;
 742         CLIENT *client = NULL;
 743         RPCB parms;
 744         enum clnt_stat clnt_st;
 745         char *ua = NULL;
 746         rpcvers_t vers;
 747         struct netbuf *address = NULL;
 748         rpcvers_t start_vers = RPCBVERS4;
 749         struct netbuf servaddr;
 750
 751         /* parameter checking */
 752         if (nconf == NULL) {
 753                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 754                 return (NULL);
 755         }
 756
 757         parms.r_addr = NULL;
 758
 759         /*
 760          * Use default total timeout if no timeout is specified.
 761          */
 762         if (tp == NULL)
 763                 tp = &tottimeout;
 764
 765 #ifdef PORTMAP
 766         /* Try version 2 for TCP or UDP */
 767         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 768                 u_short port = 0;
 769                 struct netbuf remote;
 770                 rpcvers_t pmapvers = 2;
 771                 struct pmap pmapparms;
 772
 773                 /*
 774                  * Try UDP only - there are some portmappers out
 775                  * there that use UDP only.
 776                  */
 777                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 778                         struct netconfig *newnconf;
 779
 780                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 781                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 782                                 return (NULL);
 783                         }
 784                         client = getclnthandle(host, newnconf, &parms.r_addr);
 785                         freenetconfigent(newnconf);
 786                 } else {
 787                         client = getclnthandle(host, nconf, &parms.r_addr);
 788                 }
 789                 if (client == NULL)
 790                         return (NULL);
 791
 792                 /*
 793                  * Set version and retry timeout.
 794                  */
 795                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 796                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 797
 798                 pmapparms.pm_prog = program;
 799                 pmapparms.pm_vers = version;
 800                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 801                                         IPPROTO_UDP : IPPROTO_TCP;
 802                 pmapparms.pm_port = 0;  /* not needed */
 803                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 804                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 805                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 806                     *tp);
 807                 if (clnt_st != RPC_SUCCESS) {
 808                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 809                                 (clnt_st == RPC_PROGUNAVAIL))
 810                                 goto try_rpcbind; /* Try different versions */
 811                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 812                         clnt_geterr(client, &rpc_createerr.cf_error);
 813                         goto error;
 814                 } else if (port == 0) {
 815                         address = NULL;
 816                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 817                         goto error;
 818                 }
 819                 port = htons(port);
 820                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 821                 if (((address = (struct netbuf *)
 822                         malloc(sizeof (struct netbuf))) == NULL) ||
 823                     ((address->buf = (char *)
 824                         malloc(remote.len)) == NULL)) {
 825                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 826                         clnt_geterr(client, &rpc_createerr.cf_error);
 827                         if (address) {
 828                                 free(address);
 829                                 address = NULL;
 830                         }
 831                         goto error;
 832                 }
 833                 memcpy(address->buf, remote.buf, remote.len);
 834                 memcpy(&((char *)address->buf)[sizeof (short)],
 835                                 (char *)(void *)&port, sizeof (short));
 836                 address->len = address->maxlen = remote.len;
 837                 goto done;
 838         }
 839 #endif                          /* PORTMAP */
 840
 841 try_rpcbind:
 842         /*
 843          * Check if rpcbind is up.  This prevents needless delays when
 844          * accessing applications such as the keyserver while booting
 845          * disklessly.
 846          */
 847         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 848                 if (!__rpcbind_is_up()) {
 849                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 850                         rpc_createerr.cf_error.re_errno = 0;
 851                         goto error;
 852                 }
 853                 check_rpcbind = FALSE;
 854         }
 855
 856         /*
 857          * Now we try version 4 and then 3.
 858          * We also send the remote system the address we used to
 859          * contact it in case it can help to connect back with us
 860          */
 861         parms.r_prog = program;
 862         parms.r_vers = version;
 863         /*LINTED const castaway*/
 864         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 865                                                         /* just for xdring */
 866         parms.r_netid = nconf->nc_netid; /* not really needed */
 867
 868         /*
 869          * If a COTS transport is being used, try getting address via CLTS
 870          * transport.  This works only with version 4.
 871          */
 872         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 873                         nconf->nc_semantics == NC_TPI_COTS) {
 874
 875                 void *handle;
 876                 struct netconfig *nconf_clts;
 877                 rpcb_entry_list_ptr relp = NULL;
 878
 879                 if (client == NULL) {
 880                         /* This did not go through the above PORTMAP/TCP code */
 881                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 882                                 while ((nconf_clts = __rpc_getconf(handle))
 883                                         != NULL) {
 884                                         if (strcmp(nconf_clts->nc_protofmly,
 885                                                 nconf->nc_protofmly) != 0) {
 886                                                 continue;
 887                                         }
 888                                         client = getclnthandle(host, nconf_clts,
 889                                                         &parms.r_addr);
 890                                         break;
 891                                 }
 892                                 __rpc_endconf(handle);
 893                         }
 894                         if (client == NULL)
 895                                 goto regular_rpcbind;   /* Go the regular way */
 896                 } else {
 897                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 898                         vers = RPCBVERS4;
 899                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 900                 }
 901                 /*
 902                  * We also send the remote system the address we used to
 903                  * contact it in case it can help it connect back with us
 904                  */
 905                 if (parms.r_addr == NULL) {
 906                         /*LINTED const castaway*/
 907                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 908                 }
 909
 910                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 911
 912                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 913                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 914                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 915                     (char *)(void *)&relp, *tp);
 916                 if (clnt_st == RPC_SUCCESS) {
 917                         if ((address = got_entry(relp, nconf)) != NULL) {
 918                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 919                                     (char *)(void *)&relp);
 920                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 921                                         (char *)(void *)&servaddr);
 922                                 __rpc_fixup_addr(address, &servaddr);
 923                                 goto done;
 924                         }
 925                         /* Entry not found for this transport */
 926                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 927                             (char *)(void *)&relp);
 928                         /*
 929                          * XXX: should have perhaps returned with error but
 930                          * since the remote machine might not always be able
 931                          * to send the address on all transports, we try the
 932                          * regular way with regular_rpcbind
 933                          */
 934                         goto regular_rpcbind;
 935                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 936                         (clnt_st == RPC_PROGUNAVAIL)) {
 937                         start_vers = RPCBVERS;  /* Try version 3 now */
 938                         goto regular_rpcbind; /* Try different versions */
 939                 } else {
 940                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 941                         clnt_geterr(client, &rpc_createerr.cf_error);
 942                         goto error;
 943                 }
 944         }
 945
 946 regular_rpcbind:
 947
 948         /* Now the same transport is to be used to get the address */
 949         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 950                         (nconf->nc_semantics == NC_TPI_COTS))) {
 951                 /* A CLTS type of client - destroy it */
 952                 CLNT_DESTROY(client);
 953                 client = NULL;
 954         }
 955
 956         if (client == NULL) {
 957                 client = getclnthandle(host, nconf, &parms.r_addr);
 958                 if (client == NULL) {
 959                         goto error;
 960                 }
 961         }
 962         if (parms.r_addr == NULL) {
 963                 /*LINTED const castaway*/
 964                 parms.r_addr = (char *) &nullstring[0];
 965         }
 966
 967         /* First try from start_vers and then version 3 (RPCBVERS) */
 968
 969         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 970         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 971                 /* Set the version */
 972                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 973                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 974                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 975                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 976                 if (clnt_st == RPC_SUCCESS) {
 977                         if ((ua == NULL) || (ua[0] == 0)) {
 978                                 /* address unknown */
 979                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 980                                 goto error;
 981                         }
 982                         address = uaddr2taddr(nconf, ua);
 983 #ifdef ND_DEBUG
 984                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 985                         if (!address)
 986                                 fprintf(stderr,
 987                                         "\tCouldn't resolve remote address!\n");
 988 #endif
 989                         xdr_free((xdrproc_t)xdr_wrapstring,
 990                             (char *)(void *)&ua);
 991
 992                         if (! address) {
 993                                 /* We don't know about your universal address */
 994                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 995                                 goto error;
 996                         }
 997                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
 998                             (char *)(void *)&servaddr);
 999                         __rpc_fixup_addr(address, &servaddr);
1000                         goto done;
1001                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1002                         struct rpc_err rpcerr;
1003
1004                         clnt_geterr(client, &rpcerr);
1005                         if (rpcerr.re_vers.low > RPCBVERS4)
1006                                 goto error;  /* a new version, can't handle */
1007                 } else if (clnt_st != RPC_PROGUNAVAIL) {
1008                         /* Cant handle this error */
1009                         rpc_createerr.cf_stat = clnt_st;
1010                         clnt_geterr(client, &rpc_createerr.cf_error);
1011                         goto error;
1012                 }
1013         }
1014
1015         if ((address == NULL) || (address->len == 0)) {
1016                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
1017                 clnt_geterr(client, &rpc_createerr.cf_error);
1018         }
1019
1020 error:
1021         if (client) {
1022                 CLNT_DESTROY(client);
1023                 client = NULL;
1024         }
1025 done:
1026         if (nconf->nc_semantics != NC_TPI_CLTS) {
1027                 /* This client is the connectionless one */
1028                 if (client) {
1029                         CLNT_DESTROY(client);
1030                         client = NULL;
1031                 }
1032         }
1033         if (clpp) {
1034                 *clpp = client;
1035         } else if (client) {
1036                 CLNT_DESTROY(client);
1037         }
1038         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1039                 free(parms.r_addr);
1040         return (address);
1041 }
1042
1043
1044 /*
1045  * Find the mapped address for program, version.
1046  * Calls the rpcbind service remotely to do the lookup.
1047  * Uses the transport specified in nconf.
1048  * Returns FALSE (0) if no map exists, else returns 1.
1049  *
1050  * Assuming that the address is all properly allocated
1051  */
1052 int
1053 rpcb_getaddr(program, version, nconf, address, host)
1054         rpcprog_t program;
1055         rpcvers_t version;
1056         const struct netconfig *nconf;
1057         struct netbuf *address;
1058         const char *host;
1059 {
1060         struct netbuf *na;
1061
1062         if ((na = __rpcb_findaddr_timed(program, version,
1063             (struct netconfig *) nconf, (char *) host,
1064             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1065                 return (FALSE);
1066
1067         if (na->len > address->maxlen) {
1068                 /* Too long address */
1069                 free(na->buf);
1070                 free(na);
1071                 rpc_createerr.cf_stat = RPC_FAILED;
1072                 return (FALSE);
1073         }
1074         memcpy(address->buf, na->buf, (size_t)na->len);
1075         address->len = na->len;
1076         free(na->buf);
1077         free(na);
1078         return (TRUE);
1079 }
1080
1081 /*
1082  * Get a copy of the current maps.
1083  * Calls the rpcbind service remotely to get the maps.
1084  *
1085  * It returns only a list of the services
1086  * It returns NULL on failure.
1087  */
1088 rpcblist *
1089 rpcb_getmaps(nconf, host)
1090         const struct netconfig *nconf;
1091         const char *host;
1092 {
1093         rpcblist_ptr head = NULL;
1094         CLIENT *client;
1095         enum clnt_stat clnt_st;
1096         rpcvers_t vers = 0;
1097
1098         client = getclnthandle(host, nconf, NULL);
1099         if (client == NULL) {
1100                 return (head);
1101         }
1102         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1103             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1104             (char *)(void *)&head, tottimeout);
1105         if (clnt_st == RPC_SUCCESS)
1106                 goto done;
1107
1108         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1109             (clnt_st != RPC_PROGUNAVAIL)) {
1110                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1111                 clnt_geterr(client, &rpc_createerr.cf_error);
1112                 goto done;
1113         }
1114
1115         /* fall back to earlier version */
1116         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1117         if (vers == RPCBVERS4) {
1118                 vers = RPCBVERS;
1119                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1120                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1121                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1122                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1123                         goto done;
1124         }
1125         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1126         clnt_geterr(client, &rpc_createerr.cf_error);
1127
1128 done:
1129         CLNT_DESTROY(client);
1130         return (head);
1131 }
1132
1133 /*
1134  * rpcbinder remote-call-service interface.
1135  * This routine is used to call the rpcbind remote call service
1136  * which will look up a service program in the address maps, and then
1137  * remotely call that routine with the given parameters. This allows
1138  * programs to do a lookup and call in one step.
1139 */
1140 enum clnt_stat
1141 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1142                 xdrres, resp, tout, addr_ptr)
1143         const struct netconfig *nconf;  /* Netconfig structure */
1144         const char *host;                       /* Remote host name */
1145         rpcprog_t prog;
1146         rpcvers_t vers;
1147         rpcproc_t proc;                 /* Remote proc identifiers */
1148         xdrproc_t xdrargs, xdrres;      /* XDR routines */
1149         caddr_t argsp, resp;            /* Argument and Result */
1150         struct timeval tout;            /* Timeout value for this call */
1151         const struct netbuf *addr_ptr;  /* Preallocated netbuf address */
1152 {
1153         CLIENT *client;
1154         enum clnt_stat stat;
1155         struct r_rpcb_rmtcallargs a;
1156         struct r_rpcb_rmtcallres r;
1157         rpcvers_t rpcb_vers;
1158
1159         stat = 0;
1160         client = getclnthandle(host, nconf, NULL);
1161         if (client == NULL) {
1162                 return (RPC_FAILED);
1163         }
1164         /*LINTED const castaway*/
1165         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1166         a.prog = prog;
1167         a.vers = vers;
1168         a.proc = proc;
1169         a.args.args_val = argsp;
1170         a.xdr_args = xdrargs;
1171         r.addr = NULL;
1172         r.results.results_val = resp;
1173         r.xdr_res = xdrres;
1174
1175         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1176                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1177                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1178                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1179                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1180                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1181                         struct netbuf *na;
1182                         /*LINTED const castaway*/
1183                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1184                         if (!na) {
1185                                 stat = RPC_N2AXLATEFAILURE;
1186                                 /*LINTED const castaway*/
1187                                 ((struct netbuf *) addr_ptr)->len = 0;
1188                                 goto error;
1189                         }
1190                         if (na->len > addr_ptr->maxlen) {
1191                                 /* Too long address */
1192                                 stat = RPC_FAILED; /* XXX A better error no */
1193                                 free(na->buf);
1194                                 free(na);
1195                                 /*LINTED const castaway*/
1196                                 ((struct netbuf *) addr_ptr)->len = 0;
1197                                 goto error;
1198                         }
1199                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1200                         /*LINTED const castaway*/
1201                         ((struct netbuf *)addr_ptr)->len = na->len;
1202                         free(na->buf);
1203                         free(na);
1204                         break;
1205                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1206                             (stat != RPC_PROGUNAVAIL)) {
1207                         goto error;
1208                 }
1209         }
1210 error:
1211         CLNT_DESTROY(client);
1212         if (r.addr)
1213                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1214         return (stat);
1215 }
1216
1217 /*
1218  * Gets the time on the remote host.
1219  * Returns 1 if succeeds else 0.
1220  */
1221 bool_t
1222 rpcb_gettime(host, timep)
1223         const char *host;
1224         time_t *timep;
1225 {
1226         CLIENT *client = NULL;
1227         void *handle;
1228         struct netconfig *nconf;
1229         rpcvers_t vers;
1230         enum clnt_stat st;
1231
1232
1233         if ((host == NULL) || (host[0] == 0)) {
1234                 time(timep);
1235                 return (TRUE);
1236         }
1237
1238         if ((handle = __rpc_setconf("netpath")) == NULL) {
1239                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1240                 return (FALSE);
1241         }
1242         rpc_createerr.cf_stat = RPC_SUCCESS;
1243         while (client == NULL) {
1244                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1245                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1246                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1247                         break;
1248                 }
1249                 client = getclnthandle(host, nconf, NULL);
1250                 if (client)
1251                         break;
1252         }
1253         __rpc_endconf(handle);
1254         if (client == (CLIENT *) NULL) {
1255                 return (FALSE);
1256         }
1257
1258         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1259                 (xdrproc_t) xdr_void, NULL,
1260                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1261
1262         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1263                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1264                 if (vers == RPCBVERS4) {
1265                         /* fall back to earlier version */
1266                         vers = RPCBVERS;
1267                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1268                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1269                                 (xdrproc_t) xdr_void, NULL,
1270                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1271                                 tottimeout);
1272                 }
1273         }
1274         CLNT_DESTROY(client);
1275         return (st == RPC_SUCCESS? TRUE: FALSE);
1276 }
1277
1278 /*
1279  * Converts taddr to universal address.  This routine should never
1280  * really be called because local n2a libraries are always provided.
1281  */
1282 char *
1283 rpcb_taddr2uaddr(nconf, taddr)
1284         struct netconfig *nconf;
1285         struct netbuf *taddr;
1286 {
1287         CLIENT *client;
1288         char *uaddr = NULL;
1289
1290
1291         /* parameter checking */
1292         if (nconf == NULL) {
1293                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1294                 return (NULL);
1295         }
1296         if (taddr == NULL) {
1297                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1298                 return (NULL);
1299         }
1300         client = local_rpcb();
1301         if (! client) {
1302                 return (NULL);
1303         }
1304
1305         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1306             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1307             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1308         CLNT_DESTROY(client);
1309         return (uaddr);
1310 }
1311
1312 /*
1313  * Converts universal address to netbuf.  This routine should never
1314  * really be called because local n2a libraries are always provided.
1315  */
1316 struct netbuf *
1317 rpcb_uaddr2taddr(nconf, uaddr)
1318         struct netconfig *nconf;
1319         char *uaddr;
1320 {
1321         CLIENT *client;
1322         struct netbuf *taddr;
1323
1324
1325         /* parameter checking */
1326         if (nconf == NULL) {
1327                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1328                 return (NULL);
1329         }
1330         if (uaddr == NULL) {
1331                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1332                 return (NULL);
1333         }
1334         client = local_rpcb();
1335         if (! client) {
1336                 return (NULL);
1337         }
1338
1339         taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1340         if (taddr == NULL) {
1341                 CLNT_DESTROY(client);
1342                 return (NULL);
1343         }
1344         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1345             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1346             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1347             tottimeout) != RPC_SUCCESS) {
1348                 free(taddr);
1349                 taddr = NULL;
1350         }
1351         CLNT_DESTROY(client);
1352         return (taddr);
1353 }