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(lint) && defined(SCCSIDS)
  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
  93 static struct timeval tottimeout = { 60, 0 };
  94 static const struct timeval rmttimeout = { 3, 0 };
  95 static struct timeval rpcbrmttime = { 15, 0 };
  96
  97 extern bool_t xdr_wrapstring(XDR *, char **);
  98
  99 static const char nullstring[] = "\000";
 100
 101 #define CACHESIZE 6
 102
 103 struct address_cache {
 104         char *ac_host;
 105         char *ac_netid;
 106         char *ac_uaddr;
 107         struct netbuf *ac_taddr;
 108         struct address_cache *ac_next;
 109 };
 110
 111 static struct address_cache *front;
 112 static int cachesize;
 113
 114 #define CLCR_GET_RPCB_TIMEOUT   1
 115 #define CLCR_SET_RPCB_TIMEOUT   2
 116
 117
 118 extern int __rpc_lowvers;
 119
 120 static struct address_cache *check_cache(const char *, const char *);
 121 static void delete_cache(struct netbuf *);
 122 static void add_cache(const char *, const char *, struct netbuf *, char *);
 123 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
 124 static CLIENT *local_rpcb(void);
 125 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
 126
 127 /*
 128  * This routine adjusts the timeout used for calls to the remote rpcbind.
 129  * Also, this routine can be used to set the use of portmapper version 2
 130  * only when doing rpc_broadcasts
 131  * These are private routines that may not be provided in future releases.
 132  */
 133 bool_t
 134 __rpc_control(request, info)
 135         int     request;
 136         void    *info;
 137 {
 138         switch (request) {
 139         case CLCR_GET_RPCB_TIMEOUT:
 140                 *(struct timeval *)info = tottimeout;
 141                 break;
 142         case CLCR_SET_RPCB_TIMEOUT:
 143                 tottimeout = *(struct timeval *)info;
 144                 break;
 145         case CLCR_SET_LOWVERS:
 146                 __rpc_lowvers = *(int *)info;
 147                 break;
 148         case CLCR_GET_LOWVERS:
 149                 *(int *)info = __rpc_lowvers;
 150                 break;
 151         default:
 152                 return (FALSE);
 153         }
 154         return (TRUE);
 155 }
 156
 157 /*
 158  *      It might seem that a reader/writer lock would be more reasonable here.
 159  *      However because getclnthandle(), the only user of the cache functions,
 160  *      may do a delete_cache() operation if a check_cache() fails to return an
 161  *      address useful to clnt_tli_create(), we may as well use a mutex.
 162  */
 163 /*
 164  * As it turns out, if the cache lock is *not* a reader/writer lock, we will
 165  * block all clnt_create's if we are trying to connect to a host that's down,
 166  * since the lock will be held all during that time.
 167  */
 168 extern rwlock_t rpcbaddr_cache_lock;
 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         extern mutex_t loopnconf_lock;
 452         int sock;
 453         size_t tsize;
 454         struct netbuf nbuf;
 455         struct sockaddr_un sun;
 456
 457         /*
 458          * Try connecting to the local rpcbind through a local socket
 459          * first. If this doesn't work, try all transports defined in
 460          * the netconfig file.
 461          */
 462         memset(&sun, 0, sizeof sun);
 463         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 464         if (sock < 0)
 465                 goto try_nconf;
 466         sun.sun_family = AF_LOCAL;
 467         strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 468         nbuf.len = sun.sun_len = SUN_LEN(&sun);
 469         nbuf.maxlen = sizeof (struct sockaddr_un);
 470         nbuf.buf = &sun;
 471
 472         tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
 473         client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
 474             (rpcvers_t)RPCBVERS, tsize, tsize);
 475
 476         if (client != NULL) {
 477                 /* Mark the socket to be closed in destructor */
 478                 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
 479                 return client;
 480         }
 481
 482         /* Nobody needs this socket anymore; free the descriptor. */
 483         _close(sock);
 484
 485 try_nconf:
 486
 487 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
 488         mutex_lock(&loopnconf_lock);
 489         if (loopnconf == NULL) {
 490                 struct netconfig *nconf, *tmpnconf = NULL;
 491                 void *nc_handle;
 492                 int fd;
 493
 494                 nc_handle = setnetconfig();
 495                 if (nc_handle == NULL) {
 496                         /* fails to open netconfig file */
 497                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 498                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 499                         mutex_unlock(&loopnconf_lock);
 500                         return (NULL);
 501                 }
 502                 while ((nconf = getnetconfig(nc_handle)) != NULL) {
 503 #ifdef INET6
 504                         if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
 505 #else
 506                         if ((
 507 #endif
 508                              strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
 509                             (nconf->nc_semantics == NC_TPI_COTS ||
 510                              nconf->nc_semantics == NC_TPI_COTS_ORD)) {
 511                                 fd = __rpc_nconf2fd(nconf);
 512                                 /*
 513                                  * Can't create a socket, assume that
 514                                  * this family isn't configured in the kernel.
 515                                  */
 516                                 if (fd < 0)
 517                                         continue;
 518                                 _close(fd);
 519                                 tmpnconf = nconf;
 520                                 if (!strcmp(nconf->nc_protofmly, NC_INET))
 521                                         hostname = IN4_LOCALHOST_STRING;
 522                                 else
 523                                         hostname = IN6_LOCALHOST_STRING;
 524                         }
 525                 }
 526                 if (tmpnconf == NULL) {
 527                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 528                         mutex_unlock(&loopnconf_lock);
 529                         return (NULL);
 530                 }
 531                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 532                 /* loopnconf is never freed */
 533                 endnetconfig(nc_handle);
 534         }
 535         mutex_unlock(&loopnconf_lock);
 536         client = getclnthandle(hostname, loopnconf, NULL);
 537         return (client);
 538 }
 539
 540 /*
 541  * Set a mapping between program, version and address.
 542  * Calls the rpcbind service to do the mapping.
 543  */
 544 bool_t
 545 rpcb_set(program, version, nconf, address)
 546         rpcprog_t program;
 547         rpcvers_t version;
 548         const struct netconfig *nconf;  /* Network structure of transport */
 549         const struct netbuf *address;           /* Services netconfig address */
 550 {
 551         CLIENT *client;
 552         bool_t rslt = FALSE;
 553         RPCB parms;
 554         char uidbuf[32];
 555
 556         /* parameter checking */
 557         if (nconf == NULL) {
 558                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 559                 return (FALSE);
 560         }
 561         if (address == NULL) {
 562                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 563                 return (FALSE);
 564         }
 565         client = local_rpcb();
 566         if (! client) {
 567                 return (FALSE);
 568         }
 569
 570         /* convert to universal */
 571         /*LINTED const castaway*/
 572         parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
 573                                    (struct netbuf *)address);
 574         if (!parms.r_addr) {
 575                 CLNT_DESTROY(client);
 576                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 577                 return (FALSE); /* no universal address */
 578         }
 579         parms.r_prog = program;
 580         parms.r_vers = version;
 581         parms.r_netid = nconf->nc_netid;
 582         /*
 583          * Though uid is not being used directly, we still send it for
 584          * completeness.  For non-unix platforms, perhaps some other
 585          * string or an empty string can be sent.
 586          */
 587         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 588         parms.r_owner = uidbuf;
 589
 590         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 591             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 592             (char *)(void *)&rslt, tottimeout);
 593
 594         CLNT_DESTROY(client);
 595         free(parms.r_addr);
 596         return (rslt);
 597 }
 598
 599 /*
 600  * Remove the mapping between program, version and netbuf address.
 601  * Calls the rpcbind service to do the un-mapping.
 602  * If netbuf is NULL, unset for all the transports, otherwise unset
 603  * only for the given transport.
 604  */
 605 bool_t
 606 rpcb_unset(program, version, nconf)
 607         rpcprog_t program;
 608         rpcvers_t version;
 609         const struct netconfig *nconf;
 610 {
 611         CLIENT *client;
 612         bool_t rslt = FALSE;
 613         RPCB parms;
 614         char uidbuf[32];
 615
 616         client = local_rpcb();
 617         if (! client) {
 618                 return (FALSE);
 619         }
 620
 621         parms.r_prog = program;
 622         parms.r_vers = version;
 623         if (nconf)
 624                 parms.r_netid = nconf->nc_netid;
 625         else {
 626                 /*LINTED const castaway*/
 627                 parms.r_netid = (char *) &nullstring[0]; /* unsets  all */
 628         }
 629         /*LINTED const castaway*/
 630         parms.r_addr = (char *) &nullstring[0];
 631         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 632         parms.r_owner = uidbuf;
 633
 634         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 635             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 636             (char *)(void *)&rslt, tottimeout);
 637
 638         CLNT_DESTROY(client);
 639         return (rslt);
 640 }
 641
 642 /*
 643  * From the merged list, find the appropriate entry
 644  */
 645 static struct netbuf *
 646 got_entry(relp, nconf)
 647         rpcb_entry_list_ptr relp;
 648         const struct netconfig *nconf;
 649 {
 650         struct netbuf *na = NULL;
 651         rpcb_entry_list_ptr sp;
 652         rpcb_entry *rmap;
 653
 654         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 655                 rmap = &sp->rpcb_entry_map;
 656                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 657                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 658                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 659                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != NULL)) {
 660                         na = uaddr2taddr(nconf, rmap->r_maddr);
 661 #ifdef ND_DEBUG
 662                         fprintf(stderr, "\tRemote address is [%s].\n",
 663                                 rmap->r_maddr);
 664                         if (!na)
 665                                 fprintf(stderr,
 666                                     "\tCouldn't resolve remote address!\n");
 667 #endif
 668                         break;
 669                 }
 670         }
 671         return (na);
 672 }
 673
 674 /*
 675  * Quick check to see if rpcbind is up.  Tries to connect over
 676  * local transport.
 677  */
 678 bool_t
 679 __rpcbind_is_up()
 680 {
 681         struct netconfig *nconf;
 682         struct sockaddr_un sun;
 683         void *localhandle;
 684         int sock;
 685
 686         nconf = NULL;
 687         localhandle = setnetconfig();
 688         while (nconf = getnetconfig(localhandle)){
 689                 if (nconf->nc_protofmly != NULL &&
 690                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 691                          break;
 692         }
 693         if (nconf == NULL)
 694                 return (FALSE);
 695
 696         endnetconfig(localhandle);
 697
 698         memset(&sun, 0, sizeof sun);
 699         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 700         if (sock < 0)
 701                 return (FALSE);
 702         sun.sun_family = AF_LOCAL;
 703         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 704         sun.sun_len = SUN_LEN(&sun);
 705
 706         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 707                 _close(sock);
 708                 return (FALSE);
 709         }
 710
 711         _close(sock);
 712         return (TRUE);
 713 }
 714
 715 /*
 716  * An internal function which optimizes rpcb_getaddr function.  It also
 717  * returns the client handle that it uses to contact the remote rpcbind.
 718  *
 719  * The algorithm used: If the transports is TCP or UDP, it first tries
 720  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 721  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 722  * that time, version 4 would be available on many machines on the network.
 723  * With this algorithm, we get performance as well as a plan for
 724  * obsoleting version 2.
 725  *
 726  * For all other transports, the algorithm remains as 4 and then 3.
 727  *
 728  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 729  * handle for COTS cases and hence in these cases we do not return the
 730  * client handle.  This code will change if t_connect() ever
 731  * starts working properly.  Also look under clnt_vc.c.
 732  */
 733 struct netbuf *
 734 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
 735         rpcprog_t program;
 736         rpcvers_t version;
 737         const struct netconfig *nconf;
 738         const char *host;
 739         CLIENT **clpp;
 740         struct timeval *tp;
 741 {
 742         static bool_t check_rpcbind = TRUE;
 743         CLIENT *client = NULL;
 744         RPCB parms;
 745         enum clnt_stat clnt_st;
 746         char *ua = NULL;
 747         rpcvers_t vers;
 748         struct netbuf *address = NULL;
 749         rpcvers_t start_vers = RPCBVERS4;
 750         struct netbuf servaddr;
 751
 752         /* parameter checking */
 753         if (nconf == NULL) {
 754                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 755                 return (NULL);
 756         }
 757
 758         parms.r_addr = NULL;
 759
 760         /*
 761          * Use default total timeout if no timeout is specified.
 762          */
 763         if (tp == NULL)
 764                 tp = &tottimeout;
 765
 766 #ifdef PORTMAP
 767         /* Try version 2 for TCP or UDP */
 768         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 769                 u_short port = 0;
 770                 struct netbuf remote;
 771                 rpcvers_t pmapvers = 2;
 772                 struct pmap pmapparms;
 773
 774                 /*
 775                  * Try UDP only - there are some portmappers out
 776                  * there that use UDP only.
 777                  */
 778                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 779                         struct netconfig *newnconf;
 780                         void *handle;
 781
 782                         if ((handle = getnetconfigent("udp")) == NULL) {
 783                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 784                                 return (NULL);
 785                         }
 786                         if ((newnconf = __rpc_getconf(handle)) == NULL) {
 787                                 __rpc_endconf(handle);
 788                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 789                                 return (NULL);
 790                         }
 791                         client = getclnthandle(host, newnconf, &parms.r_addr);
 792                         __rpc_endconf(handle);
 793                 } else {
 794                         client = getclnthandle(host, nconf, &parms.r_addr);
 795                 }
 796                 if (client == NULL)
 797                         return (NULL);
 798
 799                 /*
 800                  * Set version and retry timeout.
 801                  */
 802                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 803                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 804
 805                 pmapparms.pm_prog = program;
 806                 pmapparms.pm_vers = version;
 807                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 808                                         IPPROTO_UDP : IPPROTO_TCP;
 809                 pmapparms.pm_port = 0;  /* not needed */
 810                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 811                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 812                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 813                     *tp);
 814                 if (clnt_st != RPC_SUCCESS) {
 815                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 816                                 (clnt_st == RPC_PROGUNAVAIL))
 817                                 goto try_rpcbind; /* Try different versions */
 818                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 819                         clnt_geterr(client, &rpc_createerr.cf_error);
 820                         goto error;
 821                 } else if (port == 0) {
 822                         address = NULL;
 823                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 824                         goto error;
 825                 }
 826                 port = htons(port);
 827                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 828                 if (((address = (struct netbuf *)
 829                         malloc(sizeof (struct netbuf))) == NULL) ||
 830                     ((address->buf = (char *)
 831                         malloc(remote.len)) == NULL)) {
 832                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 833                         clnt_geterr(client, &rpc_createerr.cf_error);
 834                         if (address) {
 835                                 free(address);
 836                                 address = NULL;
 837                         }
 838                         goto error;
 839                 }
 840                 memcpy(address->buf, remote.buf, remote.len);
 841                 memcpy(&((char *)address->buf)[sizeof (short)],
 842                                 (char *)(void *)&port, sizeof (short));
 843                 address->len = address->maxlen = remote.len;
 844                 goto done;
 845         }
 846 #endif                          /* PORTMAP */
 847
 848 try_rpcbind:
 849         /*
 850          * Check if rpcbind is up.  This prevents needless delays when
 851          * accessing applications such as the keyserver while booting
 852          * disklessly.
 853          */
 854         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 855                 if (!__rpcbind_is_up()) {
 856                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 857                         rpc_createerr.cf_error.re_errno = 0;
 858                         goto error;
 859                 }
 860                 check_rpcbind = FALSE;
 861         }
 862
 863         /*
 864          * Now we try version 4 and then 3.
 865          * We also send the remote system the address we used to
 866          * contact it in case it can help to connect back with us
 867          */
 868         parms.r_prog = program;
 869         parms.r_vers = version;
 870         /*LINTED const castaway*/
 871         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 872                                                         /* just for xdring */
 873         parms.r_netid = nconf->nc_netid; /* not really needed */
 874
 875         /*
 876          * If a COTS transport is being used, try getting address via CLTS
 877          * transport.  This works only with version 4.
 878          */
 879         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 880                         nconf->nc_semantics == NC_TPI_COTS) {
 881
 882                 void *handle;
 883                 struct netconfig *nconf_clts;
 884                 rpcb_entry_list_ptr relp = NULL;
 885
 886                 if (client == NULL) {
 887                         /* This did not go through the above PORTMAP/TCP code */
 888                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 889                                 while ((nconf_clts = __rpc_getconf(handle))
 890                                         != NULL) {
 891                                         if (strcmp(nconf_clts->nc_protofmly,
 892                                                 nconf->nc_protofmly) != 0) {
 893                                                 continue;
 894                                         }
 895                                         client = getclnthandle(host, nconf_clts,
 896                                                         &parms.r_addr);
 897                                         break;
 898                                 }
 899                                 __rpc_endconf(handle);
 900                         }
 901                         if (client == NULL)
 902                                 goto regular_rpcbind;   /* Go the regular way */
 903                 } else {
 904                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 905                         vers = RPCBVERS4;
 906                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 907                 }
 908                 /*
 909                  * We also send the remote system the address we used to
 910                  * contact it in case it can help it connect back with us
 911                  */
 912                 if (parms.r_addr == NULL) {
 913                         /*LINTED const castaway*/
 914                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 915                 }
 916
 917                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 918
 919                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 920                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 921                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 922                     (char *)(void *)&relp, *tp);
 923                 if (clnt_st == RPC_SUCCESS) {
 924                         if ((address = got_entry(relp, nconf)) != NULL) {
 925                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 926                                     (char *)(void *)&relp);
 927                                 goto done;
 928                         }
 929                         /* Entry not found for this transport */
 930                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 931                             (char *)(void *)&relp);
 932                         /*
 933                          * XXX: should have perhaps returned with error but
 934                          * since the remote machine might not always be able
 935                          * to send the address on all transports, we try the
 936                          * regular way with regular_rpcbind
 937                          */
 938                         goto regular_rpcbind;
 939                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 940                         (clnt_st == RPC_PROGUNAVAIL)) {
 941                         start_vers = RPCBVERS;  /* Try version 3 now */
 942                         goto regular_rpcbind; /* Try different versions */
 943                 } else {
 944                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 945                         clnt_geterr(client, &rpc_createerr.cf_error);
 946                         goto error;
 947                 }
 948         }
 949
 950 regular_rpcbind:
 951
 952         /* Now the same transport is to be used to get the address */
 953         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 954                         (nconf->nc_semantics == NC_TPI_COTS))) {
 955                 /* A CLTS type of client - destroy it */
 956                 CLNT_DESTROY(client);
 957                 client = NULL;
 958         }
 959
 960         if (client == NULL) {
 961                 client = getclnthandle(host, nconf, &parms.r_addr);
 962                 if (client == NULL) {
 963                         goto error;
 964                 }
 965         }
 966         if (parms.r_addr == NULL) {
 967                 /*LINTED const castaway*/
 968                 parms.r_addr = (char *) &nullstring[0];
 969         }
 970
 971         /* First try from start_vers and then version 3 (RPCBVERS) */
 972
 973         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 974         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 975                 /* Set the version */
 976                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 977                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 978                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 979                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 980                 if (clnt_st == RPC_SUCCESS) {
 981                         if ((ua == NULL) || (ua[0] == NULL)) {
 982                                 /* address unknown */
 983                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 984                                 goto error;
 985                         }
 986                         address = uaddr2taddr(nconf, ua);
 987 #ifdef ND_DEBUG
 988                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 989                         if (!address)
 990                                 fprintf(stderr,
 991                                         "\tCouldn't resolve remote address!\n");
 992 #endif
 993                         xdr_free((xdrproc_t)xdr_wrapstring,
 994                             (char *)(void *)&ua);
 995
 996                         if (! address) {
 997                                 /* We don't know about your universal address */
 998                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 999                                 goto error;
1000                         }
1001                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
1002                             (char *)(void *)&servaddr);
1003                         __rpc_fixup_addr(address, &servaddr);
1004                         goto done;
1005                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1006                         struct rpc_err rpcerr;
1007
1008                         clnt_geterr(client, &rpcerr);
1009                         if (rpcerr.re_vers.low > RPCBVERS4)
1010                                 goto error;  /* a new version, can't handle */
1011                 } else if (clnt_st != RPC_PROGUNAVAIL) {
1012                         /* Cant handle this error */
1013                         rpc_createerr.cf_stat = clnt_st;
1014                         clnt_geterr(client, &rpc_createerr.cf_error);
1015                         goto error;
1016                 }
1017         }
1018
1019         if ((address == NULL) || (address->len == 0)) {
1020                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
1021                 clnt_geterr(client, &rpc_createerr.cf_error);
1022         }
1023
1024 error:
1025         if (client) {
1026                 CLNT_DESTROY(client);
1027                 client = NULL;
1028         }
1029 done:
1030         if (nconf->nc_semantics != NC_TPI_CLTS) {
1031                 /* This client is the connectionless one */
1032                 if (client) {
1033                         CLNT_DESTROY(client);
1034                         client = NULL;
1035                 }
1036         }
1037         if (clpp) {
1038                 *clpp = client;
1039         } else if (client) {
1040                 CLNT_DESTROY(client);
1041         }
1042         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1043                 free(parms.r_addr);
1044         return (address);
1045 }
1046
1047
1048 /*
1049  * Find the mapped address for program, version.
1050  * Calls the rpcbind service remotely to do the lookup.
1051  * Uses the transport specified in nconf.
1052  * Returns FALSE (0) if no map exists, else returns 1.
1053  *
1054  * Assuming that the address is all properly allocated
1055  */
1056 int
1057 rpcb_getaddr(program, version, nconf, address, host)
1058         rpcprog_t program;
1059         rpcvers_t version;
1060         const struct netconfig *nconf;
1061         struct netbuf *address;
1062         const char *host;
1063 {
1064         struct netbuf *na;
1065
1066         if ((na = __rpcb_findaddr_timed(program, version,
1067             (struct netconfig *) nconf, (char *) host,
1068             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1069                 return (FALSE);
1070
1071         if (na->len > address->maxlen) {
1072                 /* Too long address */
1073                 free(na->buf);
1074                 free(na);
1075                 rpc_createerr.cf_stat = RPC_FAILED;
1076                 return (FALSE);
1077         }
1078         memcpy(address->buf, na->buf, (size_t)na->len);
1079         address->len = na->len;
1080         free(na->buf);
1081         free(na);
1082         return (TRUE);
1083 }
1084
1085 /*
1086  * Get a copy of the current maps.
1087  * Calls the rpcbind service remotely to get the maps.
1088  *
1089  * It returns only a list of the services
1090  * It returns NULL on failure.
1091  */
1092 rpcblist *
1093 rpcb_getmaps(nconf, host)
1094         const struct netconfig *nconf;
1095         const char *host;
1096 {
1097         rpcblist_ptr head = NULL;
1098         CLIENT *client;
1099         enum clnt_stat clnt_st;
1100         rpcvers_t vers = 0;
1101
1102         client = getclnthandle(host, nconf, NULL);
1103         if (client == NULL) {
1104                 return (head);
1105         }
1106         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1107             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1108             (char *)(void *)&head, tottimeout);
1109         if (clnt_st == RPC_SUCCESS)
1110                 goto done;
1111
1112         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1113             (clnt_st != RPC_PROGUNAVAIL)) {
1114                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1115                 clnt_geterr(client, &rpc_createerr.cf_error);
1116                 goto done;
1117         }
1118
1119         /* fall back to earlier version */
1120         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1121         if (vers == RPCBVERS4) {
1122                 vers = RPCBVERS;
1123                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1124                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1125                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1126                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1127                         goto done;
1128         }
1129         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1130         clnt_geterr(client, &rpc_createerr.cf_error);
1131
1132 done:
1133         CLNT_DESTROY(client);
1134         return (head);
1135 }
1136
1137 /*
1138  * rpcbinder remote-call-service interface.
1139  * This routine is used to call the rpcbind remote call service
1140  * which will look up a service program in the address maps, and then
1141  * remotely call that routine with the given parameters. This allows
1142  * programs to do a lookup and call in one step.
1143 */
1144 enum clnt_stat
1145 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1146                 xdrres, resp, tout, addr_ptr)
1147         const struct netconfig *nconf;  /* Netconfig structure */
1148         const char *host;                       /* Remote host name */
1149         rpcprog_t prog;
1150         rpcvers_t vers;
1151         rpcproc_t proc;                 /* Remote proc identifiers */
1152         xdrproc_t xdrargs, xdrres;      /* XDR routines */
1153         caddr_t argsp, resp;            /* Argument and Result */
1154         struct timeval tout;            /* Timeout value for this call */
1155         const struct netbuf *addr_ptr;  /* Preallocated netbuf address */
1156 {
1157         CLIENT *client;
1158         enum clnt_stat stat;
1159         struct r_rpcb_rmtcallargs a;
1160         struct r_rpcb_rmtcallres r;
1161         rpcvers_t rpcb_vers;
1162
1163         stat = 0;
1164         client = getclnthandle(host, nconf, NULL);
1165         if (client == NULL) {
1166                 return (RPC_FAILED);
1167         }
1168         /*LINTED const castaway*/
1169         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1170         a.prog = prog;
1171         a.vers = vers;
1172         a.proc = proc;
1173         a.args.args_val = argsp;
1174         a.xdr_args = xdrargs;
1175         r.addr = NULL;
1176         r.results.results_val = resp;
1177         r.xdr_res = xdrres;
1178
1179         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1180                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1181                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1182                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1183                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1184                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1185                         struct netbuf *na;
1186                         /*LINTED const castaway*/
1187                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1188                         if (!na) {
1189                                 stat = RPC_N2AXLATEFAILURE;
1190                                 /*LINTED const castaway*/
1191                                 ((struct netbuf *) addr_ptr)->len = 0;
1192                                 goto error;
1193                         }
1194                         if (na->len > addr_ptr->maxlen) {
1195                                 /* Too long address */
1196                                 stat = RPC_FAILED; /* XXX A better error no */
1197                                 free(na->buf);
1198                                 free(na);
1199                                 /*LINTED const castaway*/
1200                                 ((struct netbuf *) addr_ptr)->len = 0;
1201                                 goto error;
1202                         }
1203                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1204                         /*LINTED const castaway*/
1205                         ((struct netbuf *)addr_ptr)->len = na->len;
1206                         free(na->buf);
1207                         free(na);
1208                         break;
1209                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1210                             (stat != RPC_PROGUNAVAIL)) {
1211                         goto error;
1212                 }
1213         }
1214 error:
1215         CLNT_DESTROY(client);
1216         if (r.addr)
1217                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1218         return (stat);
1219 }
1220
1221 /*
1222  * Gets the time on the remote host.
1223  * Returns 1 if succeeds else 0.
1224  */
1225 bool_t
1226 rpcb_gettime(host, timep)
1227         const char *host;
1228         time_t *timep;
1229 {
1230         CLIENT *client = NULL;
1231         void *handle;
1232         struct netconfig *nconf;
1233         rpcvers_t vers;
1234         enum clnt_stat st;
1235
1236
1237         if ((host == NULL) || (host[0] == NULL)) {
1238                 time(timep);
1239                 return (TRUE);
1240         }
1241
1242         if ((handle = __rpc_setconf("netpath")) == NULL) {
1243                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1244                 return (FALSE);
1245         }
1246         rpc_createerr.cf_stat = RPC_SUCCESS;
1247         while (client == NULL) {
1248                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1249                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1250                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1251                         break;
1252                 }
1253                 client = getclnthandle(host, nconf, NULL);
1254                 if (client)
1255                         break;
1256         }
1257         __rpc_endconf(handle);
1258         if (client == (CLIENT *) NULL) {
1259                 return (FALSE);
1260         }
1261
1262         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1263                 (xdrproc_t) xdr_void, NULL,
1264                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1265
1266         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1267                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1268                 if (vers == RPCBVERS4) {
1269                         /* fall back to earlier version */
1270                         vers = RPCBVERS;
1271                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1272                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1273                                 (xdrproc_t) xdr_void, NULL,
1274                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1275                                 tottimeout);
1276                 }
1277         }
1278         CLNT_DESTROY(client);
1279         return (st == RPC_SUCCESS? TRUE: FALSE);
1280 }
1281
1282 /*
1283  * Converts taddr to universal address.  This routine should never
1284  * really be called because local n2a libraries are always provided.
1285  */
1286 char *
1287 rpcb_taddr2uaddr(nconf, taddr)
1288         struct netconfig *nconf;
1289         struct netbuf *taddr;
1290 {
1291         CLIENT *client;
1292         char *uaddr = NULL;
1293
1294
1295         /* parameter checking */
1296         if (nconf == NULL) {
1297                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1298                 return (NULL);
1299         }
1300         if (taddr == NULL) {
1301                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1302                 return (NULL);
1303         }
1304         client = local_rpcb();
1305         if (! client) {
1306                 return (NULL);
1307         }
1308
1309         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1310             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1311             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1312         CLNT_DESTROY(client);
1313         return (uaddr);
1314 }
1315
1316 /*
1317  * Converts universal address to netbuf.  This routine should never
1318  * really be called because local n2a libraries are always provided.
1319  */
1320 struct netbuf *
1321 rpcb_uaddr2taddr(nconf, uaddr)
1322         struct netconfig *nconf;
1323         char *uaddr;
1324 {
1325         CLIENT *client;
1326         struct netbuf *taddr;
1327
1328
1329         /* parameter checking */
1330         if (nconf == NULL) {
1331                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1332                 return (NULL);
1333         }
1334         if (uaddr == NULL) {
1335                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1336                 return (NULL);
1337         }
1338         client = local_rpcb();
1339         if (! client) {
1340                 return (NULL);
1341         }
1342
1343         taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1344         if (taddr == NULL) {
1345                 CLNT_DESTROY(client);
1346                 return (NULL);
1347         }
1348         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1349             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1350             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1351             tottimeout) != RPC_SUCCESS) {
1352                 free(taddr);
1353                 taddr = NULL;
1354         }
1355         CLNT_DESTROY(client);
1356         return (taddr);
1357 }