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)) != NULL) {
 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
 781                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 782                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 783                                 return (NULL);
 784                         }
 785                         client = getclnthandle(host, newnconf, &parms.r_addr);
 786                         freenetconfigent(newnconf);
 787                 } else {
 788                         client = getclnthandle(host, nconf, &parms.r_addr);
 789                 }
 790                 if (client == NULL)
 791                         return (NULL);
 792
 793                 /*
 794                  * Set version and retry timeout.
 795                  */
 796                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 797                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 798
 799                 pmapparms.pm_prog = program;
 800                 pmapparms.pm_vers = version;
 801                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 802                                         IPPROTO_UDP : IPPROTO_TCP;
 803                 pmapparms.pm_port = 0;  /* not needed */
 804                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 805                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 806                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 807                     *tp);
 808                 if (clnt_st != RPC_SUCCESS) {
 809                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 810                                 (clnt_st == RPC_PROGUNAVAIL))
 811                                 goto try_rpcbind; /* Try different versions */
 812                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 813                         clnt_geterr(client, &rpc_createerr.cf_error);
 814                         goto error;
 815                 } else if (port == 0) {
 816                         address = NULL;
 817                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 818                         goto error;
 819                 }
 820                 port = htons(port);
 821                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 822                 if (((address = (struct netbuf *)
 823                         malloc(sizeof (struct netbuf))) == NULL) ||
 824                     ((address->buf = (char *)
 825                         malloc(remote.len)) == NULL)) {
 826                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 827                         clnt_geterr(client, &rpc_createerr.cf_error);
 828                         if (address) {
 829                                 free(address);
 830                                 address = NULL;
 831                         }
 832                         goto error;
 833                 }
 834                 memcpy(address->buf, remote.buf, remote.len);
 835                 memcpy(&((char *)address->buf)[sizeof (short)],
 836                                 (char *)(void *)&port, sizeof (short));
 837                 address->len = address->maxlen = remote.len;
 838                 goto done;
 839         }
 840 #endif                          /* PORTMAP */
 841
 842 try_rpcbind:
 843         /*
 844          * Check if rpcbind is up.  This prevents needless delays when
 845          * accessing applications such as the keyserver while booting
 846          * disklessly.
 847          */
 848         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 849                 if (!__rpcbind_is_up()) {
 850                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 851                         rpc_createerr.cf_error.re_errno = 0;
 852                         goto error;
 853                 }
 854                 check_rpcbind = FALSE;
 855         }
 856
 857         /*
 858          * Now we try version 4 and then 3.
 859          * We also send the remote system the address we used to
 860          * contact it in case it can help to connect back with us
 861          */
 862         parms.r_prog = program;
 863         parms.r_vers = version;
 864         /*LINTED const castaway*/
 865         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 866                                                         /* just for xdring */
 867         parms.r_netid = nconf->nc_netid; /* not really needed */
 868
 869         /*
 870          * If a COTS transport is being used, try getting address via CLTS
 871          * transport.  This works only with version 4.
 872          */
 873         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 874                         nconf->nc_semantics == NC_TPI_COTS) {
 875
 876                 void *handle;
 877                 struct netconfig *nconf_clts;
 878                 rpcb_entry_list_ptr relp = NULL;
 879
 880                 if (client == NULL) {
 881                         /* This did not go through the above PORTMAP/TCP code */
 882                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 883                                 while ((nconf_clts = __rpc_getconf(handle))
 884                                         != NULL) {
 885                                         if (strcmp(nconf_clts->nc_protofmly,
 886                                                 nconf->nc_protofmly) != 0) {
 887                                                 continue;
 888                                         }
 889                                         client = getclnthandle(host, nconf_clts,
 890                                                         &parms.r_addr);
 891                                         break;
 892                                 }
 893                                 __rpc_endconf(handle);
 894                         }
 895                         if (client == NULL)
 896                                 goto regular_rpcbind;   /* Go the regular way */
 897                 } else {
 898                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 899                         vers = RPCBVERS4;
 900                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 901                 }
 902                 /*
 903                  * We also send the remote system the address we used to
 904                  * contact it in case it can help it connect back with us
 905                  */
 906                 if (parms.r_addr == NULL) {
 907                         /*LINTED const castaway*/
 908                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 909                 }
 910
 911                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 912
 913                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 914                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 915                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 916                     (char *)(void *)&relp, *tp);
 917                 if (clnt_st == RPC_SUCCESS) {
 918                         if ((address = got_entry(relp, nconf)) != NULL) {
 919                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 920                                     (char *)(void *)&relp);
 921                                 goto done;
 922                         }
 923                         /* Entry not found for this transport */
 924                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 925                             (char *)(void *)&relp);
 926                         /*
 927                          * XXX: should have perhaps returned with error but
 928                          * since the remote machine might not always be able
 929                          * to send the address on all transports, we try the
 930                          * regular way with regular_rpcbind
 931                          */
 932                         goto regular_rpcbind;
 933                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 934                         (clnt_st == RPC_PROGUNAVAIL)) {
 935                         start_vers = RPCBVERS;  /* Try version 3 now */
 936                         goto regular_rpcbind; /* Try different versions */
 937                 } else {
 938                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 939                         clnt_geterr(client, &rpc_createerr.cf_error);
 940                         goto error;
 941                 }
 942         }
 943
 944 regular_rpcbind:
 945
 946         /* Now the same transport is to be used to get the address */
 947         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 948                         (nconf->nc_semantics == NC_TPI_COTS))) {
 949                 /* A CLTS type of client - destroy it */
 950                 CLNT_DESTROY(client);
 951                 client = NULL;
 952         }
 953
 954         if (client == NULL) {
 955                 client = getclnthandle(host, nconf, &parms.r_addr);
 956                 if (client == NULL) {
 957                         goto error;
 958                 }
 959         }
 960         if (parms.r_addr == NULL) {
 961                 /*LINTED const castaway*/
 962                 parms.r_addr = (char *) &nullstring[0];
 963         }
 964
 965         /* First try from start_vers and then version 3 (RPCBVERS) */
 966
 967         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 968         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 969                 /* Set the version */
 970                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 971                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 972                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 973                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 974                 if (clnt_st == RPC_SUCCESS) {
 975                         if ((ua == NULL) || (ua[0] == NULL)) {
 976                                 /* address unknown */
 977                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 978                                 goto error;
 979                         }
 980                         address = uaddr2taddr(nconf, ua);
 981 #ifdef ND_DEBUG
 982                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 983                         if (!address)
 984                                 fprintf(stderr,
 985                                         "\tCouldn't resolve remote address!\n");
 986 #endif
 987                         xdr_free((xdrproc_t)xdr_wrapstring,
 988                             (char *)(void *)&ua);
 989
 990                         if (! address) {
 991                                 /* We don't know about your universal address */
 992                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 993                                 goto error;
 994                         }
 995                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
 996                             (char *)(void *)&servaddr);
 997                         __rpc_fixup_addr(address, &servaddr);
 998                         goto done;
 999                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1000                         struct rpc_err rpcerr;
1001
1002                         clnt_geterr(client, &rpcerr);
1003                         if (rpcerr.re_vers.low > RPCBVERS4)
1004                                 goto error;  /* a new version, can't handle */
1005                 } else if (clnt_st != RPC_PROGUNAVAIL) {
1006                         /* Cant handle this error */
1007                         rpc_createerr.cf_stat = clnt_st;
1008                         clnt_geterr(client, &rpc_createerr.cf_error);
1009                         goto error;
1010                 }
1011         }
1012
1013         if ((address == NULL) || (address->len == 0)) {
1014                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
1015                 clnt_geterr(client, &rpc_createerr.cf_error);
1016         }
1017
1018 error:
1019         if (client) {
1020                 CLNT_DESTROY(client);
1021                 client = NULL;
1022         }
1023 done:
1024         if (nconf->nc_semantics != NC_TPI_CLTS) {
1025                 /* This client is the connectionless one */
1026                 if (client) {
1027                         CLNT_DESTROY(client);
1028                         client = NULL;
1029                 }
1030         }
1031         if (clpp) {
1032                 *clpp = client;
1033         } else if (client) {
1034                 CLNT_DESTROY(client);
1035         }
1036         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1037                 free(parms.r_addr);
1038         return (address);
1039 }
1040
1041
1042 /*
1043  * Find the mapped address for program, version.
1044  * Calls the rpcbind service remotely to do the lookup.
1045  * Uses the transport specified in nconf.
1046  * Returns FALSE (0) if no map exists, else returns 1.
1047  *
1048  * Assuming that the address is all properly allocated
1049  */
1050 int
1051 rpcb_getaddr(program, version, nconf, address, host)
1052         rpcprog_t program;
1053         rpcvers_t version;
1054         const struct netconfig *nconf;
1055         struct netbuf *address;
1056         const char *host;
1057 {
1058         struct netbuf *na;
1059
1060         if ((na = __rpcb_findaddr_timed(program, version,
1061             (struct netconfig *) nconf, (char *) host,
1062             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1063                 return (FALSE);
1064
1065         if (na->len > address->maxlen) {
1066                 /* Too long address */
1067                 free(na->buf);
1068                 free(na);
1069                 rpc_createerr.cf_stat = RPC_FAILED;
1070                 return (FALSE);
1071         }
1072         memcpy(address->buf, na->buf, (size_t)na->len);
1073         address->len = na->len;
1074         free(na->buf);
1075         free(na);
1076         return (TRUE);
1077 }
1078
1079 /*
1080  * Get a copy of the current maps.
1081  * Calls the rpcbind service remotely to get the maps.
1082  *
1083  * It returns only a list of the services
1084  * It returns NULL on failure.
1085  */
1086 rpcblist *
1087 rpcb_getmaps(nconf, host)
1088         const struct netconfig *nconf;
1089         const char *host;
1090 {
1091         rpcblist_ptr head = NULL;
1092         CLIENT *client;
1093         enum clnt_stat clnt_st;
1094         rpcvers_t vers = 0;
1095
1096         client = getclnthandle(host, nconf, NULL);
1097         if (client == NULL) {
1098                 return (head);
1099         }
1100         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1101             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1102             (char *)(void *)&head, tottimeout);
1103         if (clnt_st == RPC_SUCCESS)
1104                 goto done;
1105
1106         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1107             (clnt_st != RPC_PROGUNAVAIL)) {
1108                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1109                 clnt_geterr(client, &rpc_createerr.cf_error);
1110                 goto done;
1111         }
1112
1113         /* fall back to earlier version */
1114         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1115         if (vers == RPCBVERS4) {
1116                 vers = RPCBVERS;
1117                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1118                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1119                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1120                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1121                         goto done;
1122         }
1123         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1124         clnt_geterr(client, &rpc_createerr.cf_error);
1125
1126 done:
1127         CLNT_DESTROY(client);
1128         return (head);
1129 }
1130
1131 /*
1132  * rpcbinder remote-call-service interface.
1133  * This routine is used to call the rpcbind remote call service
1134  * which will look up a service program in the address maps, and then
1135  * remotely call that routine with the given parameters. This allows
1136  * programs to do a lookup and call in one step.
1137 */
1138 enum clnt_stat
1139 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1140                 xdrres, resp, tout, addr_ptr)
1141         const struct netconfig *nconf;  /* Netconfig structure */
1142         const char *host;                       /* Remote host name */
1143         rpcprog_t prog;
1144         rpcvers_t vers;
1145         rpcproc_t proc;                 /* Remote proc identifiers */
1146         xdrproc_t xdrargs, xdrres;      /* XDR routines */
1147         caddr_t argsp, resp;            /* Argument and Result */
1148         struct timeval tout;            /* Timeout value for this call */
1149         const struct netbuf *addr_ptr;  /* Preallocated netbuf address */
1150 {
1151         CLIENT *client;
1152         enum clnt_stat stat;
1153         struct r_rpcb_rmtcallargs a;
1154         struct r_rpcb_rmtcallres r;
1155         rpcvers_t rpcb_vers;
1156
1157         stat = 0;
1158         client = getclnthandle(host, nconf, NULL);
1159         if (client == NULL) {
1160                 return (RPC_FAILED);
1161         }
1162         /*LINTED const castaway*/
1163         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1164         a.prog = prog;
1165         a.vers = vers;
1166         a.proc = proc;
1167         a.args.args_val = argsp;
1168         a.xdr_args = xdrargs;
1169         r.addr = NULL;
1170         r.results.results_val = resp;
1171         r.xdr_res = xdrres;
1172
1173         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1174                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1175                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1176                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1177                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1178                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1179                         struct netbuf *na;
1180                         /*LINTED const castaway*/
1181                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1182                         if (!na) {
1183                                 stat = RPC_N2AXLATEFAILURE;
1184                                 /*LINTED const castaway*/
1185                                 ((struct netbuf *) addr_ptr)->len = 0;
1186                                 goto error;
1187                         }
1188                         if (na->len > addr_ptr->maxlen) {
1189                                 /* Too long address */
1190                                 stat = RPC_FAILED; /* XXX A better error no */
1191                                 free(na->buf);
1192                                 free(na);
1193                                 /*LINTED const castaway*/
1194                                 ((struct netbuf *) addr_ptr)->len = 0;
1195                                 goto error;
1196                         }
1197                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1198                         /*LINTED const castaway*/
1199                         ((struct netbuf *)addr_ptr)->len = na->len;
1200                         free(na->buf);
1201                         free(na);
1202                         break;
1203                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1204                             (stat != RPC_PROGUNAVAIL)) {
1205                         goto error;
1206                 }
1207         }
1208 error:
1209         CLNT_DESTROY(client);
1210         if (r.addr)
1211                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1212         return (stat);
1213 }
1214
1215 /*
1216  * Gets the time on the remote host.
1217  * Returns 1 if succeeds else 0.
1218  */
1219 bool_t
1220 rpcb_gettime(host, timep)
1221         const char *host;
1222         time_t *timep;
1223 {
1224         CLIENT *client = NULL;
1225         void *handle;
1226         struct netconfig *nconf;
1227         rpcvers_t vers;
1228         enum clnt_stat st;
1229
1230
1231         if ((host == NULL) || (host[0] == NULL)) {
1232                 time(timep);
1233                 return (TRUE);
1234         }
1235
1236         if ((handle = __rpc_setconf("netpath")) == NULL) {
1237                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1238                 return (FALSE);
1239         }
1240         rpc_createerr.cf_stat = RPC_SUCCESS;
1241         while (client == NULL) {
1242                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1243                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1244                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1245                         break;
1246                 }
1247                 client = getclnthandle(host, nconf, NULL);
1248                 if (client)
1249                         break;
1250         }
1251         __rpc_endconf(handle);
1252         if (client == (CLIENT *) NULL) {
1253                 return (FALSE);
1254         }
1255
1256         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1257                 (xdrproc_t) xdr_void, NULL,
1258                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1259
1260         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1261                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1262                 if (vers == RPCBVERS4) {
1263                         /* fall back to earlier version */
1264                         vers = RPCBVERS;
1265                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1266                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1267                                 (xdrproc_t) xdr_void, NULL,
1268                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1269                                 tottimeout);
1270                 }
1271         }
1272         CLNT_DESTROY(client);
1273         return (st == RPC_SUCCESS? TRUE: FALSE);
1274 }
1275
1276 /*
1277  * Converts taddr to universal address.  This routine should never
1278  * really be called because local n2a libraries are always provided.
1279  */
1280 char *
1281 rpcb_taddr2uaddr(nconf, taddr)
1282         struct netconfig *nconf;
1283         struct netbuf *taddr;
1284 {
1285         CLIENT *client;
1286         char *uaddr = NULL;
1287
1288
1289         /* parameter checking */
1290         if (nconf == NULL) {
1291                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1292                 return (NULL);
1293         }
1294         if (taddr == NULL) {
1295                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1296                 return (NULL);
1297         }
1298         client = local_rpcb();
1299         if (! client) {
1300                 return (NULL);
1301         }
1302
1303         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1304             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1305             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1306         CLNT_DESTROY(client);
1307         return (uaddr);
1308 }
1309
1310 /*
1311  * Converts universal address to netbuf.  This routine should never
1312  * really be called because local n2a libraries are always provided.
1313  */
1314 struct netbuf *
1315 rpcb_uaddr2taddr(nconf, uaddr)
1316         struct netconfig *nconf;
1317         char *uaddr;
1318 {
1319         CLIENT *client;
1320         struct netbuf *taddr;
1321
1322
1323         /* parameter checking */
1324         if (nconf == NULL) {
1325                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1326                 return (NULL);
1327         }
1328         if (uaddr == NULL) {
1329                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1330                 return (NULL);
1331         }
1332         client = local_rpcb();
1333         if (! client) {
1334                 return (NULL);
1335         }
1336
1337         taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1338         if (taddr == NULL) {
1339                 CLNT_DESTROY(client);
1340                 return (NULL);
1341         }
1342         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1343             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1344             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1345             tottimeout) != RPC_SUCCESS) {
1346                 free(taddr);
1347                 taddr = NULL;
1348         }
1349         CLNT_DESTROY(client);
1350         return (taddr);
1351 }