sys/rpc/rpcb_clnt.c

   1 /*      $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2010, Oracle America, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  * - Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright notice,
  12  *   this list of conditions and the following disclaimer in the documentation
  13  *   and/or other materials provided with the distribution.
  14  * - Neither the name of the "Oracle America, Inc." nor the names of its
  15  *   contributors may be used to endorse or promote products derived
  16  *   from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30 /*
  31  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  32  */
  33
  34 /* #ident       "@(#)rpcb_clnt.c        1.27    94/04/24 SMI" */
  35
  36
  37 #if defined(LIBC_SCCS) && !defined(lint)
  38 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
  39 #endif
  40 #include <sys/cdefs.h>
  41 __FBSDID("$FreeBSD$");
  42
  43 /*
  44  * rpcb_clnt.c
  45  * interface to rpcbind rpc service.
  46  *
  47  * Copyright (C) 1988, Sun Microsystems, Inc.
  48  */
  49
  50 #include "opt_inet6.h"
  51
  52 #include <sys/param.h>
  53 #include <sys/systm.h>
  54 #include <sys/kernel.h>
  55 #include <sys/malloc.h>
  56 #include <sys/proc.h>
  57 #include <sys/socket.h>
  58 #include <sys/socketvar.h>
  59
  60 #include <rpc/rpc.h>
  61 #include <rpc/rpcb_clnt.h>
  62 #include <rpc/rpcb_prot.h>
  63
  64 #include <rpc/rpc_com.h>
  65
  66 static struct timeval tottimeout = { 60, 0 };
  67 static const char nullstring[] = "\000";
  68
  69 static CLIENT *local_rpcb(void);
  70
  71 #if 0
  72
  73 static const struct timeval rmttimeout = { 3, 0 };
  74 static struct timeval rpcbrmttime = { 15, 0 };
  75
  76 #define CACHESIZE 6
  77
  78 struct address_cache {
  79         char *ac_host;
  80         char *ac_netid;
  81         char *ac_uaddr;
  82         struct netbuf *ac_taddr;
  83         struct address_cache *ac_next;
  84 };
  85
  86 static struct address_cache *front;
  87 static int cachesize;
  88
  89 #define CLCR_GET_RPCB_TIMEOUT   1
  90 #define CLCR_SET_RPCB_TIMEOUT   2
  91
  92
  93 extern int __rpc_lowvers;
  94
  95 static struct address_cache *check_cache(const char *, const char *);
  96 static void delete_cache(struct netbuf *);
  97 static void add_cache(const char *, const char *, struct netbuf *, char *);
  98 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
  99 static CLIENT *local_rpcb(void);
 100 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
 101
 102 /*
 103  * This routine adjusts the timeout used for calls to the remote rpcbind.
 104  * Also, this routine can be used to set the use of portmapper version 2
 105  * only when doing rpc_broadcasts
 106  * These are private routines that may not be provided in future releases.
 107  */
 108 bool_t
 109 __rpc_control(request, info)
 110         int     request;
 111         void    *info;
 112 {
 113         switch (request) {
 114         case CLCR_GET_RPCB_TIMEOUT:
 115                 *(struct timeval *)info = tottimeout;
 116                 break;
 117         case CLCR_SET_RPCB_TIMEOUT:
 118                 tottimeout = *(struct timeval *)info;
 119                 break;
 120         case CLCR_SET_LOWVERS:
 121                 __rpc_lowvers = *(int *)info;
 122                 break;
 123         case CLCR_GET_LOWVERS:
 124                 *(int *)info = __rpc_lowvers;
 125                 break;
 126         default:
 127                 return (FALSE);
 128         }
 129         return (TRUE);
 130 }
 131
 132 /*
 133  *      It might seem that a reader/writer lock would be more reasonable here.
 134  *      However because getclnthandle(), the only user of the cache functions,
 135  *      may do a delete_cache() operation if a check_cache() fails to return an
 136  *      address useful to clnt_tli_create(), we may as well use a mutex.
 137  */
 138 /*
 139  * As it turns out, if the cache lock is *not* a reader/writer lock, we will
 140  * block all clnt_create's if we are trying to connect to a host that's down,
 141  * since the lock will be held all during that time.
 142  */
 143
 144 /*
 145  * The routines check_cache(), add_cache(), delete_cache() manage the
 146  * cache of rpcbind addresses for (host, netid).
 147  */
 148
 149 static struct address_cache *
 150 check_cache(host, netid)
 151         const char *host, *netid;
 152 {
 153         struct address_cache *cptr;
 154
 155         /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 156
 157         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 158                 if (!strcmp(cptr->ac_host, host) &&
 159                     !strcmp(cptr->ac_netid, netid)) {
 160 #ifdef ND_DEBUG
 161                         fprintf(stderr, "Found cache entry for %s: %s\n",
 162                                 host, netid);
 163 #endif
 164                         return (cptr);
 165                 }
 166         }
 167         return ((struct address_cache *) NULL);
 168 }
 169
 170 static void
 171 delete_cache(addr)
 172         struct netbuf *addr;
 173 {
 174         struct address_cache *cptr, *prevptr = NULL;
 175
 176         /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
 177         for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
 178                 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
 179                         free(cptr->ac_host);
 180                         free(cptr->ac_netid);
 181                         free(cptr->ac_taddr->buf);
 182                         free(cptr->ac_taddr);
 183                         if (cptr->ac_uaddr)
 184                                 free(cptr->ac_uaddr);
 185                         if (prevptr)
 186                                 prevptr->ac_next = cptr->ac_next;
 187                         else
 188                                 front = cptr->ac_next;
 189                         free(cptr);
 190                         cachesize--;
 191                         break;
 192                 }
 193                 prevptr = cptr;
 194         }
 195 }
 196
 197 static void
 198 add_cache(host, netid, taddr, uaddr)
 199         const char *host, *netid;
 200         char *uaddr;
 201         struct netbuf *taddr;
 202 {
 203         struct address_cache  *ad_cache, *cptr, *prevptr;
 204
 205         ad_cache = (struct address_cache *)
 206                         malloc(sizeof (struct address_cache));
 207         if (!ad_cache) {
 208                 return;
 209         }
 210         ad_cache->ac_host = strdup(host);
 211         ad_cache->ac_netid = strdup(netid);
 212         ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
 213         ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
 214         if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
 215                 (uaddr && !ad_cache->ac_uaddr)) {
 216                 goto out;
 217         }
 218         ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
 219         ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
 220         if (ad_cache->ac_taddr->buf == NULL) {
 221 out:
 222                 if (ad_cache->ac_host)
 223                         free(ad_cache->ac_host);
 224                 if (ad_cache->ac_netid)
 225                         free(ad_cache->ac_netid);
 226                 if (ad_cache->ac_uaddr)
 227                         free(ad_cache->ac_uaddr);
 228                 if (ad_cache->ac_taddr)
 229                         free(ad_cache->ac_taddr);
 230                 free(ad_cache);
 231                 return;
 232         }
 233         memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
 234 #ifdef ND_DEBUG
 235         fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
 236 #endif
 237
 238 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  cptr */
 239
 240         rwlock_wrlock(&rpcbaddr_cache_lock);
 241         if (cachesize < CACHESIZE) {
 242                 ad_cache->ac_next = front;
 243                 front = ad_cache;
 244                 cachesize++;
 245         } else {
 246                 /* Free the last entry */
 247                 cptr = front;
 248                 prevptr = NULL;
 249                 while (cptr->ac_next) {
 250                         prevptr = cptr;
 251                         cptr = cptr->ac_next;
 252                 }
 253
 254 #ifdef ND_DEBUG
 255                 fprintf(stderr, "Deleted from cache: %s : %s\n",
 256                         cptr->ac_host, cptr->ac_netid);
 257 #endif
 258                 free(cptr->ac_host);
 259                 free(cptr->ac_netid);
 260                 free(cptr->ac_taddr->buf);
 261                 free(cptr->ac_taddr);
 262                 if (cptr->ac_uaddr)
 263                         free(cptr->ac_uaddr);
 264
 265                 if (prevptr) {
 266                         prevptr->ac_next = NULL;
 267                         ad_cache->ac_next = front;
 268                         front = ad_cache;
 269                 } else {
 270                         front = ad_cache;
 271                         ad_cache->ac_next = NULL;
 272                 }
 273                 free(cptr);
 274         }
 275         rwlock_unlock(&rpcbaddr_cache_lock);
 276 }
 277
 278 /*
 279  * This routine will return a client handle that is connected to the
 280  * rpcbind. If targaddr is non-NULL, the "universal address" of the
 281  * host will be stored in *targaddr; the caller is responsible for
 282  * freeing this string.
 283  * On error, returns NULL and free's everything.
 284  */
 285 static CLIENT *
 286 getclnthandle(host, nconf, targaddr)
 287         const char *host;
 288         const struct netconfig *nconf;
 289         char **targaddr;
 290 {
 291         CLIENT *client;
 292         struct netbuf *addr, taddr;
 293         struct netbuf addr_to_delete;
 294         struct __rpc_sockinfo si;
 295         struct addrinfo hints, *res, *tres;
 296         struct address_cache *ad_cache;
 297         char *tmpaddr;
 298
 299 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock:  ad_cache */
 300
 301         /* Get the address of the rpcbind.  Check cache first */
 302         client = NULL;
 303         addr_to_delete.len = 0;
 304         rwlock_rdlock(&rpcbaddr_cache_lock);
 305         ad_cache = NULL;
 306         if (host != NULL)
 307                 ad_cache = check_cache(host, nconf->nc_netid);
 308         if (ad_cache != NULL) {
 309                 addr = ad_cache->ac_taddr;
 310                 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
 311                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 312                 if (client != NULL) {
 313                         if (targaddr)
 314                                 *targaddr = strdup(ad_cache->ac_uaddr);
 315                         rwlock_unlock(&rpcbaddr_cache_lock);
 316                         return (client);
 317                 }
 318                 addr_to_delete.len = addr->len;
 319                 addr_to_delete.buf = (char *)malloc(addr->len);
 320                 if (addr_to_delete.buf == NULL) {
 321                         addr_to_delete.len = 0;
 322                 } else {
 323                         memcpy(addr_to_delete.buf, addr->buf, addr->len);
 324                 }
 325         }
 326         rwlock_unlock(&rpcbaddr_cache_lock);
 327         if (addr_to_delete.len != 0) {
 328                 /*
 329                  * Assume this may be due to cache data being
 330                  *  outdated
 331                  */
 332                 rwlock_wrlock(&rpcbaddr_cache_lock);
 333                 delete_cache(&addr_to_delete);
 334                 rwlock_unlock(&rpcbaddr_cache_lock);
 335                 free(addr_to_delete.buf);
 336         }
 337         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 338                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 339                 return NULL;
 340         }
 341
 342         memset(&hints, 0, sizeof hints);
 343         hints.ai_family = si.si_af;
 344         hints.ai_socktype = si.si_socktype;
 345         hints.ai_protocol = si.si_proto;
 346
 347 #ifdef CLNT_DEBUG
 348         printf("trying netid %s family %d proto %d socktype %d\n",
 349             nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
 350 #endif
 351
 352         if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 353                 client = local_rpcb();
 354                 if (! client) {
 355 #ifdef ND_DEBUG
 356                         clnt_pcreateerror("rpcbind clnt interface");
 357 #endif
 358                         return (NULL);
 359                 } else {
 360                         struct sockaddr_un sun;
 361                         if (targaddr) {
 362                             *targaddr = malloc(sizeof(sun.sun_path));
 363                             if (*targaddr == NULL) {
 364                                 CLNT_DESTROY(client);
 365                                 return (NULL);
 366                             }
 367                             strncpy(*targaddr, _PATH_RPCBINDSOCK,
 368                                 sizeof(sun.sun_path));
 369                         }
 370                         return (client);
 371                 }
 372         } else {
 373                 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
 374                         rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
 375                         return NULL;
 376                 }
 377         }
 378
 379         for (tres = res; tres != NULL; tres = tres->ai_next) {
 380                 taddr.buf = tres->ai_addr;
 381                 taddr.len = taddr.maxlen = tres->ai_addrlen;
 382
 383 #ifdef ND_DEBUG
 384                 {
 385                         char *ua;
 386
 387                         ua = taddr2uaddr(nconf, &taddr);
 388                         fprintf(stderr, "Got it [%s]\n", ua);
 389                         free(ua);
 390                 }
 391 #endif
 392
 393 #ifdef ND_DEBUG
 394                 {
 395                         int i;
 396
 397                         fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
 398                                 taddr.len, taddr.maxlen);
 399                         fprintf(stderr, "\tAddress is ");
 400                         for (i = 0; i < taddr.len; i++)
 401                                 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
 402                         fprintf(stderr, "\n");
 403                 }
 404 #endif
 405                 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
 406                     (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
 407 #ifdef ND_DEBUG
 408                 if (! client) {
 409                         clnt_pcreateerror("rpcbind clnt interface");
 410                 }
 411 #endif
 412
 413                 if (client) {
 414                         tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
 415                         add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
 416                         if (targaddr)
 417                                 *targaddr = tmpaddr;
 418                         break;
 419                 }
 420         }
 421         if (res)
 422                 freeaddrinfo(res);
 423         return (client);
 424 }
 425
 426 #endif
 427
 428 /* XXX */
 429 #define IN4_LOCALHOST_STRING    "127.0.0.1"
 430 #define IN6_LOCALHOST_STRING    "::1"
 431
 432 /*
 433  * This routine will return a client handle that is connected to the local
 434  * rpcbind. Returns NULL on error and free's everything.
 435  */
 436 static CLIENT *
 437 local_rpcb()
 438 {
 439         CLIENT *client;
 440         struct socket *so;
 441         size_t tsize;
 442         struct sockaddr_un sun;
 443         int error;
 444
 445         /*
 446          * Try connecting to the local rpcbind through a local socket
 447          * first. If this doesn't work, try all transports defined in
 448          * the netconfig file.
 449          */
 450         memset(&sun, 0, sizeof sun);
 451         so = NULL;
 452         error = socreate(AF_LOCAL, &so, SOCK_STREAM, 0, curthread->td_ucred,
 453             curthread);
 454         if (error)
 455                 goto try_nconf;
 456         sun.sun_family = AF_LOCAL;
 457         strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 458         sun.sun_len = SUN_LEN(&sun);
 459
 460         tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
 461         client = clnt_vc_create(so, (struct sockaddr *)&sun, (rpcprog_t)RPCBPROG,
 462             (rpcvers_t)RPCBVERS, tsize, tsize, 1);
 463
 464         if (client != NULL) {
 465                 /* Mark the socket to be closed in destructor */
 466                 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
 467                 return client;
 468         }
 469
 470         /* Nobody needs this socket anymore; free the descriptor. */
 471         soclose(so);
 472
 473 try_nconf:
 474
 475 #if 0
 476         static struct netconfig *loopnconf;
 477         static char *localhostname;
 478
 479 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
 480         mutex_lock(&loopnconf_lock);
 481         if (loopnconf == NULL) {
 482                 struct netconfig *nconf, *tmpnconf = NULL;
 483                 void *nc_handle;
 484                 int fd;
 485
 486                 nc_handle = setnetconfig();
 487                 if (nc_handle == NULL) {
 488                         /* fails to open netconfig file */
 489                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 490                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 491                         mutex_unlock(&loopnconf_lock);
 492                         return (NULL);
 493                 }
 494                 while ((nconf = getnetconfig(nc_handle)) != NULL) {
 495                         if ((
 496 #ifdef INET6
 497                              strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
 498 #endif
 499                              strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
 500                             (nconf->nc_semantics == NC_TPI_COTS ||
 501                              nconf->nc_semantics == NC_TPI_COTS_ORD)) {
 502                                 fd = __rpc_nconf2fd(nconf);
 503                                 /*
 504                                  * Can't create a socket, assume that
 505                                  * this family isn't configured in the kernel.
 506                                  */
 507                                 if (fd < 0)
 508                                         continue;
 509                                 _close(fd);
 510                                 tmpnconf = nconf;
 511                                 if (!strcmp(nconf->nc_protofmly, NC_INET))
 512                                         localhostname = IN4_LOCALHOST_STRING;
 513                                 else
 514                                         localhostname = IN6_LOCALHOST_STRING;
 515                         }
 516                 }
 517                 if (tmpnconf == NULL) {
 518                         rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 519                         mutex_unlock(&loopnconf_lock);
 520                         return (NULL);
 521                 }
 522                 loopnconf = getnetconfigent(tmpnconf->nc_netid);
 523                 /* loopnconf is never freed */
 524                 endnetconfig(nc_handle);
 525         }
 526         mutex_unlock(&loopnconf_lock);
 527         client = getclnthandle(localhostname, loopnconf, NULL);
 528         return (client);
 529 #else
 530         return (NULL);
 531 #endif
 532 }
 533
 534 /*
 535  * Set a mapping between program, version and address.
 536  * Calls the rpcbind service to do the mapping.
 537  */
 538 bool_t
 539 rpcb_set(rpcprog_t program, rpcvers_t version,
 540     const struct netconfig *nconf,      /* Network structure of transport */
 541     const struct netbuf *address)       /* Services netconfig address */
 542 {
 543         CLIENT *client;
 544         bool_t rslt = FALSE;
 545         RPCB parms;
 546 #if 0
 547         char uidbuf[32];
 548 #endif
 549         struct netconfig nconfcopy;
 550         struct netbuf addresscopy;
 551
 552         /* parameter checking */
 553         if (nconf == NULL) {
 554                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 555                 return (FALSE);
 556         }
 557         if (address == NULL) {
 558                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
 559                 return (FALSE);
 560         }
 561         client = local_rpcb();
 562         if (! client) {
 563                 return (FALSE);
 564         }
 565
 566         /* convert to universal */
 567         /*LINTED const castaway*/
 568         nconfcopy = *nconf;
 569         addresscopy = *address;
 570         parms.r_addr = taddr2uaddr(&nconfcopy, &addresscopy);
 571         if (!parms.r_addr) {
 572                 CLNT_DESTROY(client);
 573                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
 574                 return (FALSE); /* no universal address */
 575         }
 576         parms.r_prog = program;
 577         parms.r_vers = version;
 578         parms.r_netid = nconf->nc_netid;
 579 #if 0
 580         /*
 581          * Though uid is not being used directly, we still send it for
 582          * completeness.  For non-unix platforms, perhaps some other
 583          * string or an empty string can be sent.
 584          */
 585         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 586         parms.r_owner = uidbuf;
 587 #else
 588         parms.r_owner = "";
 589 #endif
 590
 591         CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
 592             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 593             (char *)(void *)&rslt, tottimeout);
 594
 595         CLNT_DESTROY(client);
 596         free(parms.r_addr, M_RPC);
 597         return (rslt);
 598 }
 599
 600 /*
 601  * Remove the mapping between program, version and netbuf address.
 602  * Calls the rpcbind service to do the un-mapping.
 603  * If netbuf is NULL, unset for all the transports, otherwise unset
 604  * only for the given transport.
 605  */
 606 bool_t
 607 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
 608 {
 609         CLIENT *client;
 610         bool_t rslt = FALSE;
 611         RPCB parms;
 612 #if 0
 613         char uidbuf[32];
 614 #endif
 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 *)(uintptr_t) &nullstring[0]; /* unsets  all */
 628         }
 629         /*LINTED const castaway*/
 630         parms.r_addr = (char *)(uintptr_t) &nullstring[0];
 631 #if 0
 632         (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
 633         parms.r_owner = uidbuf;
 634 #else
 635         parms.r_owner = "";
 636 #endif
 637
 638         CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
 639             (char *)(void *)&parms, (xdrproc_t) xdr_bool,
 640             (char *)(void *)&rslt, tottimeout);
 641
 642         CLNT_DESTROY(client);
 643         return (rslt);
 644 }
 645
 646 #if 0
 647
 648 /*
 649  * From the merged list, find the appropriate entry
 650  */
 651 static struct netbuf *
 652 got_entry(relp, nconf)
 653         rpcb_entry_list_ptr relp;
 654         const struct netconfig *nconf;
 655 {
 656         struct netbuf *na = NULL;
 657         rpcb_entry_list_ptr sp;
 658         rpcb_entry *rmap;
 659
 660         for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
 661                 rmap = &sp->rpcb_entry_map;
 662                 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
 663                     (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
 664                     (nconf->nc_semantics == rmap->r_nc_semantics) &&
 665                     (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
 666                         na = uaddr2taddr(nconf, rmap->r_maddr);
 667 #ifdef ND_DEBUG
 668                         fprintf(stderr, "\tRemote address is [%s].\n",
 669                                 rmap->r_maddr);
 670                         if (!na)
 671                                 fprintf(stderr,
 672                                     "\tCouldn't resolve remote address!\n");
 673 #endif
 674                         break;
 675                 }
 676         }
 677         return (na);
 678 }
 679
 680 /*
 681  * Quick check to see if rpcbind is up.  Tries to connect over
 682  * local transport.
 683  */
 684 static bool_t
 685 __rpcbind_is_up()
 686 {
 687         struct netconfig *nconf;
 688         struct sockaddr_un sun;
 689         void *localhandle;
 690         int sock;
 691
 692         nconf = NULL;
 693         localhandle = setnetconfig();
 694         while ((nconf = getnetconfig(localhandle)) != NULL) {
 695                 if (nconf->nc_protofmly != NULL &&
 696                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 697                          break;
 698         }
 699         if (nconf == NULL)
 700                 return (FALSE);
 701
 702         endnetconfig(localhandle);
 703
 704         memset(&sun, 0, sizeof sun);
 705         sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
 706         if (sock < 0)
 707                 return (FALSE);
 708         sun.sun_family = AF_LOCAL;
 709         strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
 710         sun.sun_len = SUN_LEN(&sun);
 711
 712         if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
 713                 _close(sock);
 714                 return (FALSE);
 715         }
 716
 717         _close(sock);
 718         return (TRUE);
 719 }
 720
 721 /*
 722  * An internal function which optimizes rpcb_getaddr function.  It also
 723  * returns the client handle that it uses to contact the remote rpcbind.
 724  *
 725  * The algorithm used: If the transports is TCP or UDP, it first tries
 726  * version 2 (portmap), 4 and then 3 (svr4).  This order should be
 727  * changed in the next OS release to 4, 2 and 3.  We are assuming that by
 728  * that time, version 4 would be available on many machines on the network.
 729  * With this algorithm, we get performance as well as a plan for
 730  * obsoleting version 2.
 731  *
 732  * For all other transports, the algorithm remains as 4 and then 3.
 733  *
 734  * XXX: Due to some problems with t_connect(), we do not reuse the same client
 735  * handle for COTS cases and hence in these cases we do not return the
 736  * client handle.  This code will change if t_connect() ever
 737  * starts working properly.  Also look under clnt_vc.c.
 738  */
 739 struct netbuf *
 740 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
 741         rpcprog_t program;
 742         rpcvers_t version;
 743         const struct netconfig *nconf;
 744         const char *host;
 745         CLIENT **clpp;
 746         struct timeval *tp;
 747 {
 748         static bool_t check_rpcbind = TRUE;
 749         CLIENT *client = NULL;
 750         RPCB parms;
 751         enum clnt_stat clnt_st;
 752         char *ua = NULL;
 753         rpcvers_t vers;
 754         struct netbuf *address = NULL;
 755         rpcvers_t start_vers = RPCBVERS4;
 756         struct netbuf servaddr;
 757
 758         /* parameter checking */
 759         if (nconf == NULL) {
 760                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 761                 return (NULL);
 762         }
 763
 764         parms.r_addr = NULL;
 765
 766         /*
 767          * Use default total timeout if no timeout is specified.
 768          */
 769         if (tp == NULL)
 770                 tp = &tottimeout;
 771
 772 #ifdef PORTMAP
 773         /* Try version 2 for TCP or UDP */
 774         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 775                 u_short port = 0;
 776                 struct netbuf remote;
 777                 rpcvers_t pmapvers = 2;
 778                 struct pmap pmapparms;
 779
 780                 /*
 781                  * Try UDP only - there are some portmappers out
 782                  * there that use UDP only.
 783                  */
 784                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 785                         struct netconfig *newnconf;
 786
 787                         if ((newnconf = getnetconfigent("udp")) == NULL) {
 788                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 789                                 return (NULL);
 790                         }
 791                         client = getclnthandle(host, newnconf, &parms.r_addr);
 792                         freenetconfigent(newnconf);
 793                 } else {
 794                         client = getclnthandle(host, nconf, &parms.r_addr);
 795                 }
 796                 if (client == NULL)
 797                         return (NULL);
 798
 799                 /*
 800                  * Set version and retry timeout.
 801                  */
 802                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 803                 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
 804
 805                 pmapparms.pm_prog = program;
 806                 pmapparms.pm_vers = version;
 807                 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
 808                                         IPPROTO_UDP : IPPROTO_TCP;
 809                 pmapparms.pm_port = 0;  /* not needed */
 810                 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
 811                     (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
 812                     (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
 813                     *tp);
 814                 if (clnt_st != RPC_SUCCESS) {
 815                         if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 816                                 (clnt_st == RPC_PROGUNAVAIL))
 817                                 goto try_rpcbind; /* Try different versions */
 818                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 819                         clnt_geterr(client, &rpc_createerr.cf_error);
 820                         goto error;
 821                 } else if (port == 0) {
 822                         address = NULL;
 823                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 824                         goto error;
 825                 }
 826                 port = htons(port);
 827                 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
 828                 if (((address = (struct netbuf *)
 829                         malloc(sizeof (struct netbuf))) == NULL) ||
 830                     ((address->buf = (char *)
 831                         malloc(remote.len)) == NULL)) {
 832                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 833                         clnt_geterr(client, &rpc_createerr.cf_error);
 834                         if (address) {
 835                                 free(address);
 836                                 address = NULL;
 837                         }
 838                         goto error;
 839                 }
 840                 memcpy(address->buf, remote.buf, remote.len);
 841                 memcpy(&((char *)address->buf)[sizeof (short)],
 842                                 (char *)(void *)&port, sizeof (short));
 843                 address->len = address->maxlen = remote.len;
 844                 goto done;
 845         }
 846 #endif                          /* PORTMAP */
 847
 848 try_rpcbind:
 849         /*
 850          * Check if rpcbind is up.  This prevents needless delays when
 851          * accessing applications such as the keyserver while booting
 852          * disklessly.
 853          */
 854         if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
 855                 if (!__rpcbind_is_up()) {
 856                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 857                         rpc_createerr.cf_error.re_errno = 0;
 858                         goto error;
 859                 }
 860                 check_rpcbind = FALSE;
 861         }
 862
 863         /*
 864          * Now we try version 4 and then 3.
 865          * We also send the remote system the address we used to
 866          * contact it in case it can help to connect back with us
 867          */
 868         parms.r_prog = program;
 869         parms.r_vers = version;
 870         /*LINTED const castaway*/
 871         parms.r_owner = (char *) &nullstring[0];        /* not needed; */
 872                                                         /* just for xdring */
 873         parms.r_netid = nconf->nc_netid; /* not really needed */
 874
 875         /*
 876          * If a COTS transport is being used, try getting address via CLTS
 877          * transport.  This works only with version 4.
 878          */
 879         if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
 880                         nconf->nc_semantics == NC_TPI_COTS) {
 881
 882                 void *handle;
 883                 struct netconfig *nconf_clts;
 884                 rpcb_entry_list_ptr relp = NULL;
 885
 886                 if (client == NULL) {
 887                         /* This did not go through the above PORTMAP/TCP code */
 888                         if ((handle = __rpc_setconf("datagram_v")) != NULL) {
 889                                 while ((nconf_clts = __rpc_getconf(handle))
 890                                         != NULL) {
 891                                         if (strcmp(nconf_clts->nc_protofmly,
 892                                                 nconf->nc_protofmly) != 0) {
 893                                                 continue;
 894                                         }
 895                                         client = getclnthandle(host, nconf_clts,
 896                                                         &parms.r_addr);
 897                                         break;
 898                                 }
 899                                 __rpc_endconf(handle);
 900                         }
 901                         if (client == NULL)
 902                                 goto regular_rpcbind;   /* Go the regular way */
 903                 } else {
 904                         /* This is a UDP PORTMAP handle.  Change to version 4 */
 905                         vers = RPCBVERS4;
 906                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 907                 }
 908                 /*
 909                  * We also send the remote system the address we used to
 910                  * contact it in case it can help it connect back with us
 911                  */
 912                 if (parms.r_addr == NULL) {
 913                         /*LINTED const castaway*/
 914                         parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
 915                 }
 916
 917                 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
 918
 919                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
 920                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 921                     (xdrproc_t) xdr_rpcb_entry_list_ptr,
 922                     (char *)(void *)&relp, *tp);
 923                 if (clnt_st == RPC_SUCCESS) {
 924                         if ((address = got_entry(relp, nconf)) != NULL) {
 925                                 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 926                                     (char *)(void *)&relp);
 927                                 CLNT_CONTROL(client, CLGET_SVC_ADDR,
 928                                         (char *)(void *)&servaddr);
 929                                 __rpc_fixup_addr(address, &servaddr);
 930                                 goto done;
 931                         }
 932                         /* Entry not found for this transport */
 933                         xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
 934                             (char *)(void *)&relp);
 935                         /*
 936                          * XXX: should have perhaps returned with error but
 937                          * since the remote machine might not always be able
 938                          * to send the address on all transports, we try the
 939                          * regular way with regular_rpcbind
 940                          */
 941                         goto regular_rpcbind;
 942                 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
 943                         (clnt_st == RPC_PROGUNAVAIL)) {
 944                         start_vers = RPCBVERS;  /* Try version 3 now */
 945                         goto regular_rpcbind; /* Try different versions */
 946                 } else {
 947                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
 948                         clnt_geterr(client, &rpc_createerr.cf_error);
 949                         goto error;
 950                 }
 951         }
 952
 953 regular_rpcbind:
 954
 955         /* Now the same transport is to be used to get the address */
 956         if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
 957                         (nconf->nc_semantics == NC_TPI_COTS))) {
 958                 /* A CLTS type of client - destroy it */
 959                 CLNT_DESTROY(client);
 960                 client = NULL;
 961         }
 962
 963         if (client == NULL) {
 964                 client = getclnthandle(host, nconf, &parms.r_addr);
 965                 if (client == NULL) {
 966                         goto error;
 967                 }
 968         }
 969         if (parms.r_addr == NULL) {
 970                 /*LINTED const castaway*/
 971                 parms.r_addr = (char *) &nullstring[0];
 972         }
 973
 974         /* First try from start_vers and then version 3 (RPCBVERS) */
 975
 976         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
 977         for (vers = start_vers;  vers >= RPCBVERS; vers--) {
 978                 /* Set the version */
 979                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
 980                 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
 981                     (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
 982                     (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
 983                 if (clnt_st == RPC_SUCCESS) {
 984                         if ((ua == NULL) || (ua[0] == 0)) {
 985                                 /* address unknown */
 986                                 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 987                                 goto error;
 988                         }
 989                         address = uaddr2taddr(nconf, ua);
 990 #ifdef ND_DEBUG
 991                         fprintf(stderr, "\tRemote address is [%s]\n", ua);
 992                         if (!address)
 993                                 fprintf(stderr,
 994                                         "\tCouldn't resolve remote address!\n");
 995 #endif
 996                         xdr_free((xdrproc_t)xdr_wrapstring,
 997                             (char *)(void *)&ua);
 998
 999                         if (! address) {
1000                                 /* We don't know about your universal address */
1001                                 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
1002                                 goto error;
1003                         }
1004                         CLNT_CONTROL(client, CLGET_SVC_ADDR,
1005                             (char *)(void *)&servaddr);
1006                         __rpc_fixup_addr(address, &servaddr);
1007                         goto done;
1008                 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1009                         struct rpc_err rpcerr;
1010
1011                         clnt_geterr(client, &rpcerr);
1012                         if (rpcerr.re_vers.low > RPCBVERS4)
1013                                 goto error;  /* a new version, can't handle */
1014                 } else if (clnt_st != RPC_PROGUNAVAIL) {
1015                         /* Cant handle this error */
1016                         rpc_createerr.cf_stat = clnt_st;
1017                         clnt_geterr(client, &rpc_createerr.cf_error);
1018                         goto error;
1019                 }
1020         }
1021
1022 error:
1023         if (client) {
1024                 CLNT_DESTROY(client);
1025                 client = NULL;
1026         }
1027 done:
1028         if (nconf->nc_semantics != NC_TPI_CLTS) {
1029                 /* This client is the connectionless one */
1030                 if (client) {
1031                         CLNT_DESTROY(client);
1032                         client = NULL;
1033                 }
1034         }
1035         if (clpp) {
1036                 *clpp = client;
1037         } else if (client) {
1038                 CLNT_DESTROY(client);
1039         }
1040         if (parms.r_addr != NULL && parms.r_addr != nullstring)
1041                 free(parms.r_addr);
1042         return (address);
1043 }
1044
1045
1046 /*
1047  * Find the mapped address for program, version.
1048  * Calls the rpcbind service remotely to do the lookup.
1049  * Uses the transport specified in nconf.
1050  * Returns FALSE (0) if no map exists, else returns 1.
1051  *
1052  * Assuming that the address is all properly allocated
1053  */
1054 int
1055 rpcb_getaddr(program, version, nconf, address, host)
1056         rpcprog_t program;
1057         rpcvers_t version;
1058         const struct netconfig *nconf;
1059         struct netbuf *address;
1060         const char *host;
1061 {
1062         struct netbuf *na;
1063
1064         if ((na = __rpcb_findaddr_timed(program, version,
1065             (struct netconfig *) nconf, (char *) host,
1066             (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1067                 return (FALSE);
1068
1069         if (na->len > address->maxlen) {
1070                 /* Too long address */
1071                 free(na->buf);
1072                 free(na);
1073                 rpc_createerr.cf_stat = RPC_FAILED;
1074                 return (FALSE);
1075         }
1076         memcpy(address->buf, na->buf, (size_t)na->len);
1077         address->len = na->len;
1078         free(na->buf);
1079         free(na);
1080         return (TRUE);
1081 }
1082
1083 /*
1084  * Get a copy of the current maps.
1085  * Calls the rpcbind service remotely to get the maps.
1086  *
1087  * It returns only a list of the services
1088  * It returns NULL on failure.
1089  */
1090 rpcblist *
1091 rpcb_getmaps(nconf, host)
1092         const struct netconfig *nconf;
1093         const char *host;
1094 {
1095         rpcblist_ptr head = NULL;
1096         CLIENT *client;
1097         enum clnt_stat clnt_st;
1098         rpcvers_t vers = 0;
1099
1100         client = getclnthandle(host, nconf, NULL);
1101         if (client == NULL) {
1102                 return (head);
1103         }
1104         clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1105             (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1106             (char *)(void *)&head, tottimeout);
1107         if (clnt_st == RPC_SUCCESS)
1108                 goto done;
1109
1110         if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1111             (clnt_st != RPC_PROGUNAVAIL)) {
1112                 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1113                 clnt_geterr(client, &rpc_createerr.cf_error);
1114                 goto done;
1115         }
1116
1117         /* fall back to earlier version */
1118         CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1119         if (vers == RPCBVERS4) {
1120                 vers = RPCBVERS;
1121                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1122                 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1123                     (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1124                     (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1125                         goto done;
1126         }
1127         rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1128         clnt_geterr(client, &rpc_createerr.cf_error);
1129
1130 done:
1131         CLNT_DESTROY(client);
1132         return (head);
1133 }
1134
1135 /*
1136  * rpcbinder remote-call-service interface.
1137  * This routine is used to call the rpcbind remote call service
1138  * which will look up a service program in the address maps, and then
1139  * remotely call that routine with the given parameters. This allows
1140  * programs to do a lookup and call in one step.
1141 */
1142 enum clnt_stat
1143 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1144                 xdrres, resp, tout, addr_ptr)
1145         const struct netconfig *nconf;  /* Netconfig structure */
1146         const char *host;                       /* Remote host name */
1147         rpcprog_t prog;
1148         rpcvers_t vers;
1149         rpcproc_t proc;                 /* Remote proc identifiers */
1150         xdrproc_t xdrargs, xdrres;      /* XDR routines */
1151         caddr_t argsp, resp;            /* Argument and Result */
1152         struct timeval tout;            /* Timeout value for this call */
1153         const struct netbuf *addr_ptr;  /* Preallocated netbuf address */
1154 {
1155         CLIENT *client;
1156         enum clnt_stat stat;
1157         struct r_rpcb_rmtcallargs a;
1158         struct r_rpcb_rmtcallres r;
1159         rpcvers_t rpcb_vers;
1160
1161         stat = 0;
1162         client = getclnthandle(host, nconf, NULL);
1163         if (client == NULL) {
1164                 return (RPC_FAILED);
1165         }
1166         /*LINTED const castaway*/
1167         CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1168         a.prog = prog;
1169         a.vers = vers;
1170         a.proc = proc;
1171         a.args.args_val = argsp;
1172         a.xdr_args = xdrargs;
1173         r.addr = NULL;
1174         r.results.results_val = resp;
1175         r.xdr_res = xdrres;
1176
1177         for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1178                 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1179                 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1180                     (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1181                     (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1182                 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1183                         struct netbuf *na;
1184                         /*LINTED const castaway*/
1185                         na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1186                         if (!na) {
1187                                 stat = RPC_N2AXLATEFAILURE;
1188                                 /*LINTED const castaway*/
1189                                 ((struct netbuf *) addr_ptr)->len = 0;
1190                                 goto error;
1191                         }
1192                         if (na->len > addr_ptr->maxlen) {
1193                                 /* Too long address */
1194                                 stat = RPC_FAILED; /* XXX A better error no */
1195                                 free(na->buf);
1196                                 free(na);
1197                                 /*LINTED const castaway*/
1198                                 ((struct netbuf *) addr_ptr)->len = 0;
1199                                 goto error;
1200                         }
1201                         memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1202                         /*LINTED const castaway*/
1203                         ((struct netbuf *)addr_ptr)->len = na->len;
1204                         free(na->buf);
1205                         free(na);
1206                         break;
1207                 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1208                             (stat != RPC_PROGUNAVAIL)) {
1209                         goto error;
1210                 }
1211         }
1212 error:
1213         CLNT_DESTROY(client);
1214         if (r.addr)
1215                 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1216         return (stat);
1217 }
1218
1219 /*
1220  * Gets the time on the remote host.
1221  * Returns 1 if succeeds else 0.
1222  */
1223 bool_t
1224 rpcb_gettime(host, timep)
1225         const char *host;
1226         time_t *timep;
1227 {
1228         CLIENT *client = NULL;
1229         void *handle;
1230         struct netconfig *nconf;
1231         rpcvers_t vers;
1232         enum clnt_stat st;
1233
1234
1235         if ((host == NULL) || (host[0] == 0)) {
1236                 time(timep);
1237                 return (TRUE);
1238         }
1239
1240         if ((handle = __rpc_setconf("netpath")) == NULL) {
1241                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1242                 return (FALSE);
1243         }
1244         rpc_createerr.cf_stat = RPC_SUCCESS;
1245         while (client == NULL) {
1246                 if ((nconf = __rpc_getconf(handle)) == NULL) {
1247                         if (rpc_createerr.cf_stat == RPC_SUCCESS)
1248                                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1249                         break;
1250                 }
1251                 client = getclnthandle(host, nconf, NULL);
1252                 if (client)
1253                         break;
1254         }
1255         __rpc_endconf(handle);
1256         if (client == (CLIENT *) NULL) {
1257                 return (FALSE);
1258         }
1259
1260         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1261                 (xdrproc_t) xdr_void, NULL,
1262                 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1263
1264         if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1265                 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1266                 if (vers == RPCBVERS4) {
1267                         /* fall back to earlier version */
1268                         vers = RPCBVERS;
1269                         CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1270                         st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1271                                 (xdrproc_t) xdr_void, NULL,
1272                                 (xdrproc_t) xdr_int, (char *)(void *)timep,
1273                                 tottimeout);
1274                 }
1275         }
1276         CLNT_DESTROY(client);
1277         return (st == RPC_SUCCESS? TRUE: FALSE);
1278 }
1279
1280 static bool_t
1281 xdr_netbuf(XDR *xdrs, struct netbuf *objp)
1282 {
1283         bool_t dummy;
1284         void **pp;
1285
1286         if (!xdr_uint32_t(xdrs, (uint32_t *) &objp->maxlen)) {
1287                 return (FALSE);
1288         }
1289         pp = &objp->buf;
1290         dummy = xdr_bytes(xdrs, (char **) pp,
1291                         (u_int *)&(objp->len), objp->maxlen);
1292         return (dummy);
1293 }
1294
1295 /*
1296  * Converts taddr to universal address.  This routine should never
1297  * really be called because local n2a libraries are always provided.
1298  */
1299 char *
1300 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1301 {
1302         CLIENT *client;
1303         char *uaddr = NULL;
1304
1305
1306         /* parameter checking */
1307         if (nconf == NULL) {
1308                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1309                 return (NULL);
1310         }
1311         if (taddr == NULL) {
1312                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1313                 return (NULL);
1314         }
1315         client = local_rpcb();
1316         if (! client) {
1317                 return (NULL);
1318         }
1319
1320         CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1321             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1322             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1323         CLNT_DESTROY(client);
1324         return (uaddr);
1325 }
1326
1327 /*
1328  * Converts universal address to netbuf.  This routine should never
1329  * really be called because local n2a libraries are always provided.
1330  */
1331 struct netbuf *
1332 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1333 {
1334         CLIENT *client;
1335         struct netbuf *taddr;
1336
1337
1338         /* parameter checking */
1339         if (nconf == NULL) {
1340                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1341                 return (NULL);
1342         }
1343         if (uaddr == NULL) {
1344                 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1345                 return (NULL);
1346         }
1347         client = local_rpcb();
1348         if (! client) {
1349                 return (NULL);
1350         }
1351
1352         taddr = (struct netbuf *)malloc(sizeof (struct netbuf), M_RPC, M_WAITOK|M_ZERO);
1353         if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1354             (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1355             (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1356             tottimeout) != RPC_SUCCESS) {
1357                 free(taddr);
1358                 taddr = NULL;
1359         }
1360         CLNT_DESTROY(client);
1361         return (taddr);
1362 }
1363
1364 #endif