sys/rpc/rpcb_clnt.c

   1 /*      $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $     */
   2
   3 /*
   4  * The contents of this file are subject to the Sun Standards
   5  * License Version 1.0 the (the "License";) You may not use
   6  * this file except in compliance with the License.  You may
   7  * obtain a copy of the License at lib/libc/rpc/LICENSE
   8  *
   9  * Software distributed under the License is distributed on
  10  * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
  11  * express or implied.  See the License for the specific
  12  * language governing rights and limitations under the License.
  13  *
  14  * The Original Code is Copyright 1998 by Sun Microsystems, Inc
  15  *
  16  * The Initial Developer of the Original Code is:  Sun
  17  * Microsystems, Inc.
  18  *
  19  * All Rights Reserved.
  20  *
  21  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  22  * unrestricted use provided that this legend is included on all tape
  23  * media and as a part of the software program in whole or part.  Users
  24  * may copy or modify Sun RPC without charge, but are not authorized
  25  * to license or distribute it to anyone else except as part of a product or
  26  * program developed by the user.
  27  *
  28  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  29  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  30  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  31  *
  32  * Sun RPC is provided with no support and without any obligation on the
  33  * part of Sun Microsystems, Inc. to assist in its use, correction,
  34  * modification or enhancement.
  35  *
  36  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  37  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  38  * OR ANY PART THEREOF.
  39  *
  40  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  41  * or profits or other special, indirect and consequential damages, even if
  42  * Sun has been advised of the possibility of such damages.
  43  *
  44  * Sun Microsystems, Inc.
  45  * 2550 Garcia Avenue
  46  * Mountain View, California  94043
  47  */
  48 /*
  49  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  50  */
  51
  52 /* #ident       "@(#)rpcb_clnt.c        1.27    94/04/24 SMI" */
  53
  54
  55 #if defined(LIBC_SCCS) && !defined(lint)
  56 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
  57 #endif
  58 #include <sys/cdefs.h>
  59 __FBSDID("$FreeBSD$");
  60
  61 /*
  62  * rpcb_clnt.c
  63  * interface to rpcbind rpc service.
  64  *
  65  * Copyright (C) 1988, Sun Microsystems, Inc.
  66  */
  67
  68 #include "opt_inet6.h"
  69
  70 #include <sys/param.h>
  71 #include <sys/systm.h>
  72 #include <sys/kernel.h>
  73 #include <sys/malloc.h>
  74 #include <sys/proc.h>
  75 #include <sys/socket.h>
  76 #include <sys/socketvar.h>
  77
  78 #include <rpc/rpc.h>
  79 #include <rpc/rpcb_clnt.h>
  80 #include <rpc/rpcb_prot.h>
  81
  82 #include <rpc/rpc_com.h>
  83
  84 static struct timeval tottimeout = { 60, 0 };
  85 static const struct timeval rmttimeout = { 3, 0 };
  86 static const char nullstring[] = "\000";
  87
  88 static CLIENT *local_rpcb(void);
  89
  90 #if 0
  91
  92 static struct timeval rpcbrmttime = { 15, 0 };
  93
  94 #define CACHESIZE 6
  95
  96 struct address_cache {
  97         char *ac_host;
  98         char *ac_netid;
  99         char *ac_uaddr;
 100         struct netbuf *ac_taddr;
 101         struct address_cache *ac_next;
 102 };
 103
 104 static struct address_cache *front;
 105 static int cachesize;
 106
 107 #define CLCR_GET_RPCB_TIMEOUT   1
 108 #define CLCR_SET_RPCB_TIMEOUT   2
 109
 110
 111 extern int __rpc_lowvers;
 112
 113 static struct address_cache *check_cache(const char *, const char *);
 114 static void delete_cache(struct netbuf *);
 115 static void add_cache(const char *, const char *, struct netbuf *, char *);
 116 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
 117 static CLIENT *local_rpcb(void);
 118 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
 119
 120 /*
 121  * This routine adjusts the timeout used for calls to the remote rpcbind.
 122  * Also, this routine can be used to set the use of portmapper version 2
 123  * only when doing rpc_broadcasts
 124  * These are private routines that may not be provided in future releases.
 125  */
 126 bool_t
 127 __rpc_control(request, info)
 128         int     request;
 129         void    *info;
 130 {
 131         switch (request) {
 132         case CLCR_GET_RPCB_TIMEOUT:
 133                 *(struct timeval *)info = tottimeout;
 134                 break;
 135         case CLCR_SET_RPCB_TIMEOUT:
 136                 tottimeout = *(struct timeval *)info;
 137                 break;
 138         case CLCR_SET_LOWVERS:
 139                 __rpc_lowvers = *(int *)info;
 140                 break;
 141         case CLCR_GET_LOWVERS:
 142                 *(int *)info = __rpc_lowvers;
 143                 break;
 144         default:
 145                 return (FALSE);
 146         }
 147         return (TRUE);
 148 }
 149
 150 /*
 151  *      It might seem that a reader/writer lock would be more reasonable here.
 152  *      However because getclnthandle(), the only user of the cache functions,
 153  *      may do a delete_cache() operation if a check_cache() fails to return an
 154  *      address useful to clnt_tli_create(), we may as well use a mutex.
 155  */
 156 /*
 157  * As it turns out, if the cache lock is *not* a reader/writer lock, we will
 158  * block all clnt_create's if we are trying to connect to a host that's down,
 159  * since the lock will be held all during that time.
 160  */
 161
 162 /*
 163  * The routines check_cache(), add_cache(), delete_cache() manage the
 164  * cache of rpcbind addresses for (host, netid).
 165  */
 166
 167 static struct address_cache *
 168 check_cache(host, netid)
 169         const char *host, *netid;
 170 {
 171         struct address_cache *cptr;
 172
 173         /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 174
 175         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 176                 if (!strcmp(cptr->ac_host, host) &&
 177                     !strcmp(cptr->ac_netid, netid)) {
 178 #ifdef ND_DEBUG
 179                         fprintf(stderr, "Found cache entry for %s: %s\n",
 180                                 host, netid);
 181 #endif
 182                         return (cptr);
 183                 }
 184         }
 185         return ((struct address_cache *) NULL);
 186 }
 187
 188 static void
 189 delete_cache(addr)
 190         struct netbuf *addr;
 191 {
 192         struct address_cache *cptr, *prevptr = NULL;
 193
 194         /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 195         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 196                 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
 197                         free(cptr->ac_host);
 198                         free(cptr->ac_netid);
 199                         free(cptr->ac_taddr->buf);
 200                         free(cptr->ac_taddr);
 201                         if (cptr->ac_uaddr)
 202                                 free(cptr->ac_uaddr);
 203                         if (prevptr)
 204                                 prevptr->ac_next = cptr->ac_next;
 205                         else
 206                                 front = cptr->ac_next;
 207                         free(cptr);
 208                         cachesize--;
 209                         break;
 210                 }
 211                 prevptr = cptr;
 212         }
 213 }
 214
 215 static void
 216 add_cache(host, netid, taddr, uaddr)
 217         const char *host, *netid;
 218         char *uaddr;
 219         struct netbuf *taddr;
 220 {
 221         struct address_cache  *ad_cache, *cptr, *prevptr;
 222
 223         ad_cache = (struct address_cache *)
 224                         malloc(sizeof (struct address_cache));
 225         if (!ad_cache) {
 226                 return;
 227         }
 228         ad_cache->ac_host = strdup(host);
 229         ad_cache->ac_netid = strdup(netid);
 230         ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
 231         ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
 232         if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
 233                 (uaddr && !ad_cache->ac_uaddr)) {
 234                 goto out;
 235         }
 236         ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
 237         ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
 238         if (ad_cache->ac_taddr->buf == NULL) {
 239 out:
 240                 if (ad_cache->ac_host)
 241                         free(ad_cache->ac_host);
 242                 if (ad_cache->ac_netid)
 243                         free(ad_cache->ac_netid);
 244                 if (ad_cache->ac_uaddr)
 245                         free(ad_cache->ac_uaddr);
 246                 if (ad_cache->ac_taddr)
 247                         free(ad_cache->ac_taddr);
 248                 free(ad_cache);
 249                 return;
 250         }
 251         memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
 252 #ifdef ND_DEBUG
 253         fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
 254 #endif
 255
 256 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  cptr */
 257
 258         rwlock_wrlock(&rpcbaddr_cache_lock);
 259         if (cachesize < CACHESIZE) {
 260                 ad_cache->ac_next = front;
 261                 front = ad_cache;
 262                 cachesize++;
 263         } else {
 264                 /* Free the last entry */
 265                 cptr = front;
 266                 prevptr = NULL;
 267                 while (cptr->ac_next) {
 268                         prevptr = cptr;
 269                         cptr = cptr->ac_next;
 270                 }
 271
 272 #ifdef ND_DEBUG
 273                 fprintf(stderr, "Deleted from cache: %s : %s\n",
 274                         cptr->ac_host, cptr->ac_netid);
 275 #endif
 276                 free(cptr->ac_host);
 277                 free(cptr->ac_netid);
 278                 free(cptr->ac_taddr->buf);
 279                 free(cptr->ac_taddr);
 280                 if (cptr->ac_uaddr)
 281                         free(cptr->ac_uaddr);
 282
 283                 if (prevptr) {
 284                         prevptr->ac_next = NULL;
 285                         ad_cache->ac_next = front;
 286                         front = ad_cache;
 287                 } else {
 288                         front = ad_cache;
 289                         ad_cache->ac_next = NULL;
 290                 }
 291                 free(cptr);
 292         }
 293         rwlock_unlock(&rpcbaddr_cache_lock);
 294 }
 295
 296 /*
 297  * This routine will return a client handle that is connected to the
 298  * rpcbind. If targaddr is non-NULL, the "universal address" of the
 299  * host will be stored in *targaddr; the caller is responsible for
 300  * freeing this string.
 301  * On error, returns NULL and free's everything.
 302  */
 303 static CLIENT *
 304 getclnthandle(host, nconf, targaddr)
 305         const char *host;
 306         const struct netconfig *nconf;
 307         char **targaddr;
 308 {
 309         CLIENT *client;
 310         struct netbuf *addr, taddr;
 311         struct netbuf addr_to_delete;
 312         struct __rpc_sockinfo si;
 313         struct addrinfo hints, *res, *tres;
 314         struct address_cache *ad_cache;
 315         char *tmpaddr;
 316
 317 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  ad_cache */
 318
 319         /* Get the address of the rpcbind.  Check cache first */
 320         client = NULL;
 321         addr_to_delete.len = 0;
 322         rwlock_rdlock(&rpcbaddr_cache_lock);
 323         ad_cache = NULL;
 324         if (host != NULL)
 325                 ad_cache = check_cache(host, nconf->nc_netid);
 326         if (ad_cache != NULL) {
 327                 addr = ad_cache->ac_taddr;
 328                 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
 329                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 330                 if (client != NULL) {
 331                         if (targaddr)
 332                                 *targaddr = strdup(ad_cache->ac_uaddr);
 333                         rwlock_unlock(&rpcbaddr_cache_lock);
 334                         return (client);
 335                 }
 336                 addr_to_delete.len = addr->len;
 337                 addr_to_delete.buf = (char *)malloc(addr->len);
 338                 if (addr_to_delete.buf == NULL) {
 339                         addr_to_delete.len = 0;
 340                 } else {
 341                         memcpy(addr_to_delete.buf, addr->buf, addr->len);
 342                 }
 343         }
 344         rwlock_unlock(&rpcbaddr_cache_lock);
 345         if (addr_to_delete.len != 0) {
 346                 /*
 347                  * Assume this may be due to cache data being
 348                  *  outdated
 349                  */
 350                 rwlock_wrlock(&rpcbaddr_cache_lock);
 351                 delete_cache(&addr_to_delete);
 352                 rwlock_unlock(&rpcbaddr_cache_lock);
 353                 free(addr_to_delete.buf);
 354         }
 355         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 356                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 357                 return NULL;
 358         }
 359
 360         memset(&hints, 0, sizeof hints);
 361         hints.ai_family = si.si_af;
 362         hints.ai_socktype = si.si_socktype;
 363         hints.ai_protocol = si.si_proto;
 364
 365 #ifdef CLNT_DEBUG
 366         printf("trying netid %s family %d proto %d socktype %d\n",
 367             nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
 368 #endif
 369
 370         if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 371                 client = local_rpcb();
 372                 if (! client) {
 373 #ifdef ND_DEBUG
 374                         clnt_pcreateerror("rpcbind clnt interface");
 375 #endif
 376                         return (NULL);
 377                 } else {
 378                         struct sockaddr_un sun;
 379                         if (targaddr) {
 380                             *targaddr = malloc(sizeof(sun.sun_path));
 381                             if (*targaddr == NULL) {
 382                                 CLNT_DESTROY(client);
 383                                 return (NULL);
 384                             }
 385                             strncpy(*targaddr, _PATH_RPCBINDSOCK,
 386                                 sizeof(sun.sun_path));
 387                         }
 388                         return (client);
 389                 }
 390         } else {
 391                 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
 392                         rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
 393                         return NULL;
 394                 }
 395         }
 396
 397         for (tres = res; tres != NULL; tres = tres->ai_next) {
 398                 taddr.buf = tres->ai_addr;
 399                 taddr.len = taddr.maxlen = tres->ai_addrlen;
 400
 401 #ifdef ND_DEBUG
 402                 {
 403                         char *ua;
 404
 405                         ua = taddr2uaddr(nconf, &taddr);
 406                         fprintf(stderr, "Got it [%s]\n", ua);
 407                         free(ua);
 408                 }
 409 #endif
 410
 411 #ifdef ND_DEBUG
 412                 {
 413                         int i;
 414
 415                         fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
 416                                 taddr.len, taddr.maxlen);
 417                         fprintf(stderr, "\tAddress is ");
 418                         for (i = 0; i < taddr.len; i++)
 419                                 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
 420                         fprintf(stderr, "\n");
 421                 }
 422 #endif
 423                 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
 424                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 425 #ifdef ND_DEBUG
 426                 if (! client) {
 427                         clnt_pcreateerror("rpcbind clnt interface");
 428                 }
 429 #endif
 430
 431                 if (client) {
 432                         tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
 433                         add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
 434                         if (targaddr)
 435                                 *targaddr = tmpaddr;
 436                         break;
 437                 }
 438         }
 439         if (res)
 440                 freeaddrinfo(res);
 441         return (client);
 442 }
 443
 444 #endif
 445
 446 /* XXX */
 447 #define IN4_LOCALHOST_STRING    "127.0.0.1"
 448 #define IN6_LOCALHOST_STRING    "::1"
 449
 450 /*
 451  * This routine will return a client handle that is connected to the local
 452  * rpcbind. Returns NULL on error and free's everything.
 453  */
 454 static CLIENT *
 455 local_rpcb()
 456 {
 457         CLIENT *client;
 458         struct socket *so;
 459         size_t tsize;
 460         struct sockaddr_un sun;
 461         int error;
 462
 463         /*
 464          * Try connecting to the local rpcbind through a local socket
 465          * first. If this doesn't work, try all transports defined in
 466          * the netconfig file.
 467          */
 468         memset(&sun, 0, sizeof sun);
 469         so = NULL;
 470         error = socreate(AF_LOCAL, &so, SOCK_STREAM, 0, curthread->td_ucred,
 471             curthread);
 472         if (error)
 473                 goto try_nconf;
 474         sun.sun_family = AF_LOCAL;
 475         strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 476         sun.sun_len = SUN_LEN(&sun);
 477
 478         tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
 479         client = clnt_vc_create(so, (struct sockaddr *)&sun, (rpcprog_t)RPCBPROG,
 480             (rpcvers_t)RPCBVERS, tsize, tsize, 1);
 481
 482         if (client != NULL) {
 483                 /* Mark the socket to be closed in destructor */
 484                 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
 485                 return client;
 486         }
 487
 488         /* Nobody needs this socket anymore; free the descriptor. */
 489         soclose(so);
 490
 491 try_nconf:
 492
 493 #if 0
 494         static struct netconfig *loopnconf;
 495         static char *localhostname;
 496
 497 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
 498         mutex_lock(&loopnconf_lock);
 499         if (loopnconf == NULL) {
 500                 struct netconfig *nconf, *tmpnconf = NULL;
 501                 void *nc_handle;
 502                 int fd;
 503
 504                 nc_handle = setnetconfig();
 505                 if (nc_handle == NULL) {
 506                         /* fails to open netconfig file */
 507                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 508                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 509                         mutex_unlock(&loopnconf_lock);
 510                         return (NULL);
 511                 }
 512                 while ((nconf = getnetconfig(nc_handle)) != NULL) {
 513                         if ((
 514 #ifdef INET6
 515                              strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
 516 #endif
 517                              strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
 518                             (nconf->nc_semantics == NC_TPI_COTS ||
 519                              nconf->nc_semantics == NC_TPI_COTS_ORD)) {
 520                                 fd = __rpc_nconf2fd(nconf);
 521                                 /*
 522                                  * Can't create a socket, assume that
 523                                  * this family isn't configured in the kernel.
 524                                  */
 525                                 if (fd < 0)
 526                                         continue;
 527                                 _close(fd);
 528                                 tmpnconf = nconf;
 529                                 if (!strcmp(nconf->nc_protofmly, NC_INET))
 530                                         localhostname = IN4_LOCALHOST_STRING;
 531                                 else
 532                                         localhostname = IN6_LOCALHOST_STRING;
 533                         }
 534                 }
 535                 if (tmpnconf == NULL) {
 536                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 537                         mutex_unlock(&loopnconf_lock);
 538                         return (NULL);
 539                 }
 540                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 541                 /* loopnconf is never freed */
 542                 endnetconfig(nc_handle);
 543         }
 544         mutex_unlock(&loopnconf_lock);
 545         client = getclnthandle(localhostname, loopnconf, NULL);
 546         return (client);
 547 #else
 548         return (NULL);
 549 #endif
 550 }
 551
 552 /*
 553  * Set a mapping between program, version and address.
 554  * Calls the rpcbind service to do the mapping.
 555  */
 556 bool_t
 557 rpcb_set(rpcprog_t program, rpcvers_t version,
 558     const struct netconfig *nconf,      /* Network structure of transport */
 559     const struct netbuf *address)       /* Services netconfig address */
 560 {
 561         CLIENT *client;
 562         bool_t rslt = FALSE;
 563         RPCB parms;
 564 #if 0
 565         char uidbuf[32];
 566 #endif
 567         struct netconfig nconfcopy;
 568         struct netbuf addresscopy;
 569
 570         /* parameter checking */
 571         if (nconf == NULL) {
 572                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 573                 return (FALSE);
 574         }
 575         if (address == NULL) {
 576                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 577                 return (FALSE);
 578         }
 579         client = local_rpcb();
 580         if (! client) {
 581                 return (FALSE);
 582         }
 583
 584         /* convert to universal */
 585         /*LINTED const castaway*/
 586         nconfcopy = *nconf;
 587         addresscopy = *address;
 588         parms.r_addr = taddr2uaddr(&nconfcopy, &addresscopy);
 589         if (!parms.r_addr) {
 590                 CLNT_DESTROY(client);
 591                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 592                 return (FALSE); /* no universal address */
 593         }
 594         parms.r_prog = program;
 595         parms.r_vers = version;
 596         parms.r_netid = nconf->nc_netid;
 597 #if 0
 598         /*
 599          * Though uid is not being used directly, we still send it for
 600          * completeness.  For non-unix platforms, perhaps some other
 601          * string or an empty string can be sent.
 602          */
 603         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 604         parms.r_owner = uidbuf;
 605 #else
 606         parms.r_owner = "";
 607 #endif
 608
 609         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 610             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 611             (char *)(void *)&rslt, tottimeout);
 612
 613         CLNT_DESTROY(client);
 614         free(parms.r_addr, M_RPC);
 615         return (rslt);
 616 }
 617
 618 /*
 619  * Remove the mapping between program, version and netbuf address.
 620  * Calls the rpcbind service to do the un-mapping.
 621  * If netbuf is NULL, unset for all the transports, otherwise unset
 622  * only for the given transport.
 623  */
 624 bool_t
 625 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
 626 {
 627         CLIENT *client;
 628         bool_t rslt = FALSE;
 629         RPCB parms;
 630 #if 0
 631         char uidbuf[32];
 632 #endif
 633
 634         client = local_rpcb();
 635         if (! client) {
 636                 return (FALSE);
 637         }
 638
 639         parms.r_prog = program;
 640         parms.r_vers = version;
 641         if (nconf)
 642                 parms.r_netid = nconf->nc_netid;
 643         else {
 644                 /*LINTED const castaway*/
 645                 parms.r_netid = (char *)(uintptr_t) &nullstring[0]; /* unsets  all */
 646         }
 647         /*LINTED const castaway*/
 648         parms.r_addr = (char *)(uintptr_t) &nullstring[0];
 649 #if 0
 650         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 651         parms.r_owner = uidbuf;
 652 #else
 653         parms.r_owner = "";
 654 #endif
 655
 656         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 657             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 658             (char *)(void *)&rslt, tottimeout);
 659
 660         CLNT_DESTROY(client);
 661         return (rslt);
 662 }
 663
 664 #if 0
 665
 666 /*
 667  * From the merged list, find the appropriate entry
 668  */
 669 static struct netbuf *
 670 got_entry(relp, nconf)
 671         rpcb_entry_list_ptr relp;
 672         const struct netconfig *nconf;
 673 {
 674         struct netbuf *na = NULL;
 675         rpcb_entry_list_ptr sp;
 676         rpcb_entry *rmap;
 677
 678         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 679                 rmap = &sp->rpcb_entry_map;
 680                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 681                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 682                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 683                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 684                         na = uaddr2taddr(nconf, rmap->r_maddr);
 685 #ifdef ND_DEBUG
 686                         fprintf(stderr, "\tRemote address is [%s].\n",
 687                                 rmap->r_maddr);
 688                         if (!na)
 689                                 fprintf(stderr,
 690                                     "\tCouldn't resolve remote address!\n");
 691 #endif
 692                         break;
 693                 }
 694         }
 695         return (na);
 696 }
 697
 698 /*
 699  * Quick check to see if rpcbind is up.  Tries to connect over
 700  * local transport.
 701  */
 702 static bool_t
 703 __rpcbind_is_up()
 704 {
 705         struct netconfig *nconf;
 706         struct sockaddr_un sun;
 707         void *localhandle;
 708         int sock;
 709
 710         nconf = NULL;
 711         localhandle = setnetconfig();
 712         while ((nconf = getnetconfig(localhandle)) != NULL) {
 713                 if (nconf->nc_protofmly != NULL &&
 714                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 715                          break;
 716         }
 717         if (nconf == NULL)
 718                 return (FALSE);
 719
 720         endnetconfig(localhandle);
 721
 722         memset(&sun, 0, sizeof sun);
 723         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 724         if (sock < 0)
 725                 return (FALSE);
 726         sun.sun_family = AF_LOCAL;
 727         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 728         sun.sun_len = SUN_LEN(&sun);
 729
 730         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 731                 _close(sock);
 732                 return (FALSE);
 733         }
 734
 735         _close(sock);
 736         return (TRUE);
 737 }
 738
 739 /*
 740  * An internal function which optimizes rpcb_getaddr function.  It also
 741  * returns the client handle that it uses to contact the remote rpcbind.
 742  *
 743  * The algorithm used: If the transports is TCP or UDP, it first tries
 744  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 745  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 746  * that time, version 4 would be available on many machines on the network.
 747  * With this algorithm, we get performance as well as a plan for
 748  * obsoleting version 2.
 749  *
 750  * For all other transports, the algorithm remains as 4 and then 3.
 751  *
 752  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 753  * handle for COTS cases and hence in these cases we do not return the
 754  * client handle.  This code will change if t_connect() ever
 755  * starts working properly.  Also look under clnt_vc.c.
 756  */
 757 struct netbuf *
 758 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
 759         rpcprog_t program;
 760         rpcvers_t version;
 761         const struct netconfig *nconf;
 762         const char *host;
 763         CLIENT **clpp;
 764         struct timeval *tp;
 765 {
 766         static bool_t check_rpcbind = TRUE;
 767         CLIENT *client = NULL;
 768         RPCB parms;
 769         enum clnt_stat clnt_st;
 770         char *ua = NULL;
 771         rpcvers_t vers;
 772         struct netbuf *address = NULL;
 773         rpcvers_t start_vers = RPCBVERS4;
 774         struct netbuf servaddr;
 775
 776         /* parameter checking */
 777         if (nconf == NULL) {
 778                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 779                 return (NULL);
 780         }
 781
 782         parms.r_addr = NULL;
 783
 784         /*
 785          * Use default total timeout if no timeout is specified.
 786          */
 787         if (tp == NULL)
 788                 tp = &tottimeout;
 789
 790 #ifdef PORTMAP
 791         /* Try version 2 for TCP or UDP */
 792         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 793                 u_short port = 0;
 794                 struct netbuf remote;
 795                 rpcvers_t pmapvers = 2;
 796                 struct pmap pmapparms;
 797
 798                 /*
 799                  * Try UDP only - there are some portmappers out
 800                  * there that use UDP only.
 801                  */
 802                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 803                         struct netconfig *newnconf;
 804
 805                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 806                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 807                                 return (NULL);
 808                         }
 809                         client = getclnthandle(host, newnconf, &parms.r_addr);
 810                         freenetconfigent(newnconf);
 811                 } else {
 812                         client = getclnthandle(host, nconf, &parms.r_addr);
 813                 }
 814                 if (client == NULL)
 815                         return (NULL);
 816
 817                 /*
 818                  * Set version and retry timeout.
 819                  */
 820                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 821                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 822
 823                 pmapparms.pm_prog = program;
 824                 pmapparms.pm_vers = version;
 825                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 826                                         IPPROTO_UDP : IPPROTO_TCP;
 827                 pmapparms.pm_port = 0;  /* not needed */
 828                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 829                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 830                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 831                     *tp);
 832                 if (clnt_st != RPC_SUCCESS) {
 833                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 834                                 (clnt_st == RPC_PROGUNAVAIL))
 835                                 goto try_rpcbind; /* Try different versions */
 836                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 837                         clnt_geterr(client, &rpc_createerr.cf_error);
 838                         goto error;
 839                 } else if (port == 0) {
 840                         address = NULL;
 841                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 842                         goto error;
 843                 }
 844                 port = htons(port);
 845                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 846                 if (((address = (struct netbuf *)
 847                         malloc(sizeof (struct netbuf))) == NULL) ||
 848                     ((address->buf = (char *)
 849                         malloc(remote.len)) == NULL)) {
 850                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 851                         clnt_geterr(client, &rpc_createerr.cf_error);
 852                         if (address) {
 853                                 free(address);
 854                                 address = NULL;
 855                         }
 856                         goto error;
 857                 }
 858                 memcpy(address->buf, remote.buf, remote.len);
 859                 memcpy(&((char *)address->buf)[sizeof (short)],
 860                                 (char *)(void *)&port, sizeof (short));
 861                 address->len = address->maxlen = remote.len;
 862                 goto done;
 863         }
 864 #endif                          /* PORTMAP */
 865
 866 try_rpcbind:
 867         /*
 868          * Check if rpcbind is up.  This prevents needless delays when
 869          * accessing applications such as the keyserver while booting
 870          * disklessly.
 871          */
 872         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 873                 if (!__rpcbind_is_up()) {
 874                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 875                         rpc_createerr.cf_error.re_errno = 0;
 876                         goto error;
 877                 }
 878                 check_rpcbind = FALSE;
 879         }
 880
 881         /*
 882          * Now we try version 4 and then 3.
 883          * We also send the remote system the address we used to
 884          * contact it in case it can help to connect back with us
 885          */
 886         parms.r_prog = program;
 887         parms.r_vers = version;
 888         /*LINTED const castaway*/
 889         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 890                                                         /* just for xdring */
 891         parms.r_netid = nconf->nc_netid; /* not really needed */
 892
 893         /*
 894          * If a COTS transport is being used, try getting address via CLTS
 895          * transport.  This works only with version 4.
 896          */
 897         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 898                         nconf->nc_semantics == NC_TPI_COTS) {
 899
 900                 void *handle;
 901                 struct netconfig *nconf_clts;
 902                 rpcb_entry_list_ptr relp = NULL;
 903
 904                 if (client == NULL) {
 905                         /* This did not go through the above PORTMAP/TCP code */
 906                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 907                                 while ((nconf_clts = __rpc_getconf(handle))
 908                                         != NULL) {
 909                                         if (strcmp(nconf_clts->nc_protofmly,
 910                                                 nconf->nc_protofmly) != 0) {
 911                                                 continue;
 912                                         }
 913                                         client = getclnthandle(host, nconf_clts,
 914                                                         &parms.r_addr);
 915                                         break;
 916                                 }
 917                                 __rpc_endconf(handle);
 918                         }
 919                         if (client == NULL)
 920                                 goto regular_rpcbind;   /* Go the regular way */
 921                 } else {
 922                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 923                         vers = RPCBVERS4;
 924                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 925                 }
 926                 /*
 927                  * We also send the remote system the address we used to
 928                  * contact it in case it can help it connect back with us
 929                  */
 930                 if (parms.r_addr == NULL) {
 931                         /*LINTED const castaway*/
 932                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 933                 }
 934
 935                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 936
 937                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 938                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 939                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 940                     (char *)(void *)&relp, *tp);
 941                 if (clnt_st == RPC_SUCCESS) {
 942                         if ((address = got_entry(relp, nconf)) != NULL) {
 943                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 944                                     (char *)(void *)&relp);
 945                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 946                                         (char *)(void *)&servaddr);
 947                                 __rpc_fixup_addr(address, &servaddr);
 948                                 goto done;
 949                         }
 950                         /* Entry not found for this transport */
 951                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 952                             (char *)(void *)&relp);
 953                         /*
 954                          * XXX: should have perhaps returned with error but
 955                          * since the remote machine might not always be able
 956                          * to send the address on all transports, we try the
 957                          * regular way with regular_rpcbind
 958                          */
 959                         goto regular_rpcbind;
 960                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 961                         (clnt_st == RPC_PROGUNAVAIL)) {
 962                         start_vers = RPCBVERS;  /* Try version 3 now */
 963                         goto regular_rpcbind; /* Try different versions */
 964                 } else {
 965                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 966                         clnt_geterr(client, &rpc_createerr.cf_error);
 967                         goto error;
 968                 }
 969         }
 970
 971 regular_rpcbind:
 972
 973         /* Now the same transport is to be used to get the address */
 974         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 975                         (nconf->nc_semantics == NC_TPI_COTS))) {
 976                 /* A CLTS type of client - destroy it */
 977                 CLNT_DESTROY(client);
 978                 client = NULL;
 979         }
 980
 981         if (client == NULL) {
 982                 client = getclnthandle(host, nconf, &parms.r_addr);
 983                 if (client == NULL) {
 984                         goto error;
 985                 }
 986         }
 987         if (parms.r_addr == NULL) {
 988                 /*LINTED const castaway*/
 989                 parms.r_addr = (char *) &nullstring[0];
 990         }
 991
 992         /* First try from start_vers and then version 3 (RPCBVERS) */
 993
 994         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 995         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 996                 /* Set the version */
 997                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 998                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 999                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
1000                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
1001                 if (clnt_st == RPC_SUCCESS) {
1002                         if ((ua == NULL) || (ua[0] == 0)) {
1003                                 /* address unknown */
1004                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
1005                                 goto error;
1006                         }
1007                         address = uaddr2taddr(nconf, ua);
1008 #ifdef ND_DEBUG
1009                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
1010                         if (!address)
1011                                 fprintf(stderr,
1012                                         "\tCouldn't resolve remote address!\n");
1013 #endif
1014                         xdr_free((xdrproc_t)xdr_wrapstring,
1015                             (char *)(void *)&ua);
1016
1017                         if (! address) {
1018                                 /* We don't know about your universal address */
1019                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
1020                                 goto error;
1021                         }
1022                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
1023                             (char *)(void *)&servaddr);
1024                         __rpc_fixup_addr(address, &servaddr);
1025                         goto done;
1026                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1027                         struct rpc_err rpcerr;
1028
1029                         clnt_geterr(client, &rpcerr);
1030                         if (rpcerr.re_vers.low > RPCBVERS4)
1031                                 goto error;  /* a new version, can't handle */
1032                 } else if (clnt_st != RPC_PROGUNAVAIL) {
1033                         /* Cant handle this error */
1034                         rpc_createerr.cf_stat = clnt_st;
1035                         clnt_geterr(client, &rpc_createerr.cf_error);
1036                         goto error;
1037                 }
1038         }
1039
1040 error:
1041         if (client) {
1042                 CLNT_DESTROY(client);
1043                 client = NULL;
1044         }
1045 done:
1046         if (nconf->nc_semantics != NC_TPI_CLTS) {
1047                 /* This client is the connectionless one */
1048                 if (client) {
1049                         CLNT_DESTROY(client);
1050                         client = NULL;
1051                 }
1052         }
1053         if (clpp) {
1054                 *clpp = client;
1055         } else if (client) {
1056                 CLNT_DESTROY(client);
1057         }
1058         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1059                 free(parms.r_addr);
1060         return (address);
1061 }
1062
1063
1064 /*
1065  * Find the mapped address for program, version.
1066  * Calls the rpcbind service remotely to do the lookup.
1067  * Uses the transport specified in nconf.
1068  * Returns FALSE (0) if no map exists, else returns 1.
1069  *
1070  * Assuming that the address is all properly allocated
1071  */
1072 int
1073 rpcb_getaddr(program, version, nconf, address, host)
1074         rpcprog_t program;
1075         rpcvers_t version;
1076         const struct netconfig *nconf;
1077         struct netbuf *address;
1078         const char *host;
1079 {
1080         struct netbuf *na;
1081
1082         if ((na = __rpcb_findaddr_timed(program, version,
1083             (struct netconfig *) nconf, (char *) host,
1084             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1085                 return (FALSE);
1086
1087         if (na->len > address->maxlen) {
1088                 /* Too long address */
1089                 free(na->buf);
1090                 free(na);
1091                 rpc_createerr.cf_stat = RPC_FAILED;
1092                 return (FALSE);
1093         }
1094         memcpy(address->buf, na->buf, (size_t)na->len);
1095         address->len = na->len;
1096         free(na->buf);
1097         free(na);
1098         return (TRUE);
1099 }
1100
1101 /*
1102  * Get a copy of the current maps.
1103  * Calls the rpcbind service remotely to get the maps.
1104  *
1105  * It returns only a list of the services
1106  * It returns NULL on failure.
1107  */
1108 rpcblist *
1109 rpcb_getmaps(nconf, host)
1110         const struct netconfig *nconf;
1111         const char *host;
1112 {
1113         rpcblist_ptr head = NULL;
1114         CLIENT *client;
1115         enum clnt_stat clnt_st;
1116         rpcvers_t vers = 0;
1117
1118         client = getclnthandle(host, nconf, NULL);
1119         if (client == NULL) {
1120                 return (head);
1121         }
1122         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1123             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1124             (char *)(void *)&head, tottimeout);
1125         if (clnt_st == RPC_SUCCESS)
1126                 goto done;
1127
1128         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1129             (clnt_st != RPC_PROGUNAVAIL)) {
1130                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1131                 clnt_geterr(client, &rpc_createerr.cf_error);
1132                 goto done;
1133         }
1134
1135         /* fall back to earlier version */
1136         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1137         if (vers == RPCBVERS4) {
1138                 vers = RPCBVERS;
1139                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1140                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1141                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1142                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1143                         goto done;
1144         }
1145         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1146         clnt_geterr(client, &rpc_createerr.cf_error);
1147
1148 done:
1149         CLNT_DESTROY(client);
1150         return (head);
1151 }
1152
1153 /*
1154  * rpcbinder remote-call-service interface.
1155  * This routine is used to call the rpcbind remote call service
1156  * which will look up a service program in the address maps, and then
1157  * remotely call that routine with the given parameters. This allows
1158  * programs to do a lookup and call in one step.
1159 */
1160 enum clnt_stat
1161 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1162                 xdrres, resp, tout, addr_ptr)
1163         const struct netconfig *nconf;  /* Netconfig structure */
1164         const char *host;                       /* Remote host name */
1165         rpcprog_t prog;
1166         rpcvers_t vers;
1167         rpcproc_t proc;                 /* Remote proc identifiers */
1168         xdrproc_t xdrargs, xdrres;      /* XDR routines */
1169         caddr_t argsp, resp;            /* Argument and Result */
1170         struct timeval tout;            /* Timeout value for this call */
1171         const struct netbuf *addr_ptr;  /* Preallocated netbuf address */
1172 {
1173         CLIENT *client;
1174         enum clnt_stat stat;
1175         struct r_rpcb_rmtcallargs a;
1176         struct r_rpcb_rmtcallres r;
1177         rpcvers_t rpcb_vers;
1178
1179         stat = 0;
1180         client = getclnthandle(host, nconf, NULL);
1181         if (client == NULL) {
1182                 return (RPC_FAILED);
1183         }
1184         /*LINTED const castaway*/
1185         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1186         a.prog = prog;
1187         a.vers = vers;
1188         a.proc = proc;
1189         a.args.args_val = argsp;
1190         a.xdr_args = xdrargs;
1191         r.addr = NULL;
1192         r.results.results_val = resp;
1193         r.xdr_res = xdrres;
1194
1195         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1196                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1197                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1198                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1199                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1200                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1201                         struct netbuf *na;
1202                         /*LINTED const castaway*/
1203                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1204                         if (!na) {
1205                                 stat = RPC_N2AXLATEFAILURE;
1206                                 /*LINTED const castaway*/
1207                                 ((struct netbuf *) addr_ptr)->len = 0;
1208                                 goto error;
1209                         }
1210                         if (na->len > addr_ptr->maxlen) {
1211                                 /* Too long address */
1212                                 stat = RPC_FAILED; /* XXX A better error no */
1213                                 free(na->buf);
1214                                 free(na);
1215                                 /*LINTED const castaway*/
1216                                 ((struct netbuf *) addr_ptr)->len = 0;
1217                                 goto error;
1218                         }
1219                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1220                         /*LINTED const castaway*/
1221                         ((struct netbuf *)addr_ptr)->len = na->len;
1222                         free(na->buf);
1223                         free(na);
1224                         break;
1225                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1226                             (stat != RPC_PROGUNAVAIL)) {
1227                         goto error;
1228                 }
1229         }
1230 error:
1231         CLNT_DESTROY(client);
1232         if (r.addr)
1233                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1234         return (stat);
1235 }
1236
1237 /*
1238  * Gets the time on the remote host.
1239  * Returns 1 if succeeds else 0.
1240  */
1241 bool_t
1242 rpcb_gettime(host, timep)
1243         const char *host;
1244         time_t *timep;
1245 {
1246         CLIENT *client = NULL;
1247         void *handle;
1248         struct netconfig *nconf;
1249         rpcvers_t vers;
1250         enum clnt_stat st;
1251
1252
1253         if ((host == NULL) || (host[0] == 0)) {
1254                 time(timep);
1255                 return (TRUE);
1256         }
1257
1258         if ((handle = __rpc_setconf("netpath")) == NULL) {
1259                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1260                 return (FALSE);
1261         }
1262         rpc_createerr.cf_stat = RPC_SUCCESS;
1263         while (client == NULL) {
1264                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1265                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1266                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1267                         break;
1268                 }
1269                 client = getclnthandle(host, nconf, NULL);
1270                 if (client)
1271                         break;
1272         }
1273         __rpc_endconf(handle);
1274         if (client == (CLIENT *) NULL) {
1275                 return (FALSE);
1276         }
1277
1278         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1279                 (xdrproc_t) xdr_void, NULL,
1280                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1281
1282         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1283                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1284                 if (vers == RPCBVERS4) {
1285                         /* fall back to earlier version */
1286                         vers = RPCBVERS;
1287                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1288                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1289                                 (xdrproc_t) xdr_void, NULL,
1290                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1291                                 tottimeout);
1292                 }
1293         }
1294         CLNT_DESTROY(client);
1295         return (st == RPC_SUCCESS? TRUE: FALSE);
1296 }
1297
1298 static bool_t
1299 xdr_netbuf(XDR *xdrs, struct netbuf *objp)
1300 {
1301         bool_t dummy;
1302         void **pp;
1303
1304         if (!xdr_uint32_t(xdrs, (uint32_t *) &objp->maxlen)) {
1305                 return (FALSE);
1306         }
1307         pp = &objp->buf;
1308         dummy = xdr_bytes(xdrs, (char **) pp,
1309                         (u_int *)&(objp->len), objp->maxlen);
1310         return (dummy);
1311 }
1312
1313 /*
1314  * Converts taddr to universal address.  This routine should never
1315  * really be called because local n2a libraries are always provided.
1316  */
1317 char *
1318 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1319 {
1320         CLIENT *client;
1321         char *uaddr = NULL;
1322
1323
1324         /* parameter checking */
1325         if (nconf == NULL) {
1326                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1327                 return (NULL);
1328         }
1329         if (taddr == NULL) {
1330                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1331                 return (NULL);
1332         }
1333         client = local_rpcb();
1334         if (! client) {
1335                 return (NULL);
1336         }
1337
1338         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1339             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1340             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1341         CLNT_DESTROY(client);
1342         return (uaddr);
1343 }
1344
1345 /*
1346  * Converts universal address to netbuf.  This routine should never
1347  * really be called because local n2a libraries are always provided.
1348  */
1349 struct netbuf *
1350 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1351 {
1352         CLIENT *client;
1353         struct netbuf *taddr;
1354
1355
1356         /* parameter checking */
1357         if (nconf == NULL) {
1358                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1359                 return (NULL);
1360         }
1361         if (uaddr == NULL) {
1362                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1363                 return (NULL);
1364         }
1365         client = local_rpcb();
1366         if (! client) {
1367                 return (NULL);
1368         }
1369
1370         taddr = (struct netbuf *)malloc(sizeof (struct netbuf), M_RPC, M_WAITOK|M_ZERO);
1371         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1372             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1373             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1374             tottimeout) != RPC_SUCCESS) {
1375                 free(taddr);
1376                 taddr = NULL;
1377         }
1378         CLNT_DESTROY(client);
1379         return (taddr);
1380 }
1381
1382 #endif