1 /* $NetBSD: rpcb_clnt.c,v 1.32 2024/01/23 17:24:38 christos Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33 /*
34 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
35 */
36
37 /* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */
38
39 #include <sys/cdefs.h>
40 #if defined(LIBC_SCCS) && !defined(lint)
41 #if 0
42 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
43 #else
44 __RCSID("$NetBSD: rpcb_clnt.c,v 1.32 2024/01/23 17:24:38 christos Exp $");
45 #endif
46 #endif
47
48 /*
49 * rpcb_clnt.c
50 * interface to rpcbind rpc service.
51 *
52 * Copyright (C) 1988, Sun Microsystems, Inc.
53 */
54
55 #include "namespace.h"
56 #include "reentrant.h"
57 #include <sys/types.h>
58 #include <sys/socket.h>
59 #include <sys/un.h>
60 #include <sys/utsname.h>
61 #include <rpc/rpc.h>
62 #include <rpc/rpcb_prot.h>
63 #include <rpc/nettype.h>
64 #include <netconfig.h>
65 #ifdef PORTMAP
66 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
67 #include <rpc/pmap_prot.h>
68 #endif
69 #include <assert.h>
70 #include <errno.h>
71 #include <netdb.h>
72 #include <stdio.h>
73 #include <stdlib.h>
74 #include <string.h>
75 #include <syslog.h>
76 #include <unistd.h>
77
78 #include "svc_fdset.h"
79 #include "rpc_internal.h"
80
81 #ifdef __weak_alias
82 __weak_alias(rpcb_set,_rpcb_set)
83 __weak_alias(rpcb_unset,_rpcb_unset)
84 __weak_alias(rpcb_getmaps,_rpcb_getmaps)
85 __weak_alias(rpcb_taddr2uaddr,_rpcb_taddr2uaddr)
86 __weak_alias(rpcb_uaddr2taddr,_rpcb_uaddr2taddr)
87 #endif
88
89 static struct timeval tottimeout = { 60, 0 };
90 static const struct timeval rmttimeout = { 3, 0 };
91
92 static const char nullstring[] = "\000";
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 static struct address_cache *check_cache(const char *, const char *);
112 static void delete_cache(struct netbuf *);
113 static void add_cache(const char *, const char *, struct netbuf *, char *);
114 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
115 static CLIENT *local_rpcb(void);
116 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
117
118 /*
119 * This routine adjusts the timeout used for calls to the remote rpcbind.
120 * Also, this routine can be used to set the use of portmapper version 2
121 * only when doing rpc_broadcasts
122 * These are private routines that may not be provided in future releases.
123 */
124 bool_t
__rpc_control(int request,void * info)125 __rpc_control(int request, void *info)
126 {
127
128 _DIAGASSERT(info != NULL);
129
130 switch (request) {
131 case CLCR_GET_RPCB_TIMEOUT:
132 *(struct timeval *)info = tottimeout;
133 break;
134 case CLCR_SET_RPCB_TIMEOUT:
135 tottimeout = *(struct timeval *)info;
136 break;
137 case CLCR_SET_LOWVERS:
138 __rpc_lowvers = *(int *)info;
139 break;
140 case CLCR_GET_LOWVERS:
141 *(int *)info = __rpc_lowvers;
142 break;
143 default:
144 return (FALSE);
145 }
146 return (TRUE);
147 }
148
149 /*
150 * It might seem that a reader/writer lock would be more reasonable here.
151 * However because getclnthandle(), the only user of the cache functions,
152 * may do a delete_cache() operation if a check_cache() fails to return an
153 * address useful to clnt_tli_create(), we may as well use a mutex.
154 */
155 /*
156 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
157 * block all clnt_create's if we are trying to connect to a host that's down,
158 * since the lock will be held all during that time.
159 */
160
161 /*
162 * The routines check_cache(), add_cache(), delete_cache() manage the
163 * cache of rpcbind addresses for (host, netid).
164 */
165
166 static struct address_cache *
check_cache(const char * host,const char * netid)167 check_cache(const char *host, const char *netid)
168 {
169 struct address_cache *cptr;
170
171 _DIAGASSERT(host != NULL);
172 _DIAGASSERT(netid != NULL);
173
174 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
175
176 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
177 if (!strcmp(cptr->ac_host, host) &&
178 !strcmp(cptr->ac_netid, netid)) {
179 #ifdef ND_DEBUG
180 fprintf(stderr, "Found cache entry for %s: %s\n",
181 host, netid);
182 #endif
183 return (cptr);
184 }
185 }
186 return NULL;
187 }
188
189 static void
delete_cache(struct netbuf * addr)190 delete_cache(struct netbuf *addr)
191 {
192 struct address_cache *cptr, *prevptr = NULL;
193
194 _DIAGASSERT(addr != NULL);
195
196 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
197 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
198 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
199 free(cptr->ac_host);
200 free(cptr->ac_netid);
201 free(cptr->ac_taddr->buf);
202 free(cptr->ac_taddr);
203 if (cptr->ac_uaddr)
204 free(cptr->ac_uaddr);
205 if (prevptr)
206 prevptr->ac_next = cptr->ac_next;
207 else
208 front = cptr->ac_next;
209 free(cptr);
210 cachesize--;
211 break;
212 }
213 prevptr = cptr;
214 }
215 }
216
217 static void
add_cache(const char * host,const char * netid,struct netbuf * taddr,char * uaddr)218 add_cache(const char *host, const char *netid, struct netbuf *taddr,
219 char *uaddr)
220 {
221 struct address_cache *ad_cache, *cptr, *prevptr;
222
223 _DIAGASSERT(host != NULL);
224 _DIAGASSERT(netid != NULL);
225 /* uaddr may be NULL */
226 /* taddr may be NULL ??? */
227
228 ad_cache = malloc(sizeof(*ad_cache));
229 if (!ad_cache) {
230 return;
231 }
232 ad_cache->ac_host = strdup(host);
233 ad_cache->ac_netid = strdup(netid);
234 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
235 ad_cache->ac_taddr = malloc(sizeof(*ad_cache->ac_taddr));
236 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
237 (uaddr && !ad_cache->ac_uaddr)) {
238 goto out;
239 }
240 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
241 ad_cache->ac_taddr->buf = malloc(taddr->len);
242 if (ad_cache->ac_taddr->buf == NULL) {
243 out:
244 if (ad_cache->ac_host)
245 free(ad_cache->ac_host);
246 if (ad_cache->ac_netid)
247 free(ad_cache->ac_netid);
248 if (ad_cache->ac_uaddr)
249 free(ad_cache->ac_uaddr);
250 if (ad_cache->ac_taddr)
251 free(ad_cache->ac_taddr);
252 free(ad_cache);
253 return;
254 }
255 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
256 #ifdef ND_DEBUG
257 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
258 #endif
259
260 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
261
262 rwlock_wrlock(&rpcbaddr_cache_lock);
263 if (cachesize < CACHESIZE) {
264 ad_cache->ac_next = front;
265 front = ad_cache;
266 cachesize++;
267 } else {
268 /* Free the last entry */
269 cptr = front;
270 prevptr = NULL;
271 while (cptr->ac_next) {
272 prevptr = cptr;
273 cptr = cptr->ac_next;
274 }
275
276 #ifdef ND_DEBUG
277 fprintf(stderr, "Deleted from cache: %s : %s\n",
278 cptr->ac_host, cptr->ac_netid);
279 #endif
280 free(cptr->ac_host);
281 free(cptr->ac_netid);
282 free(cptr->ac_taddr->buf);
283 free(cptr->ac_taddr);
284 if (cptr->ac_uaddr)
285 free(cptr->ac_uaddr);
286
287 if (prevptr) {
288 prevptr->ac_next = NULL;
289 ad_cache->ac_next = front;
290 front = ad_cache;
291 } else {
292 front = ad_cache;
293 ad_cache->ac_next = NULL;
294 }
295 free(cptr);
296 }
297 rwlock_unlock(&rpcbaddr_cache_lock);
298 }
299
300 /*
301 * This routine will return a client handle that is connected to the
302 * rpcbind. Returns NULL on error and free's everything.
303 */
304 static CLIENT *
getclnthandle(const char * host,const struct netconfig * nconf,char ** targaddr)305 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
306 {
307 CLIENT *client;
308 struct netbuf *addr, taddr;
309 struct netbuf addr_to_delete;
310 struct __rpc_sockinfo si;
311 struct addrinfo hints, *res, *tres;
312 struct address_cache *ad_cache;
313 char *tmpaddr;
314
315 _DIAGASSERT(host != NULL);
316 _DIAGASSERT(nconf != NULL);
317 /* targaddr may be NULL */
318
319 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
320
321 /* Get the address of the rpcbind. Check cache first */
322 client = NULL;
323 addr_to_delete.len = 0;
324 addr_to_delete.buf = NULL;
325 rwlock_rdlock(&rpcbaddr_cache_lock);
326 ad_cache = check_cache(host, nconf->nc_netid);
327 if (ad_cache != NULL) {
328 addr = ad_cache->ac_taddr;
329 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
330 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
331 if (client != NULL) {
332 if (targaddr)
333 *targaddr = ad_cache->ac_uaddr;
334 rwlock_unlock(&rpcbaddr_cache_lock);
335 return (client);
336 }
337 addr_to_delete.len = addr->len;
338 addr_to_delete.buf = malloc(addr->len);
339 if (addr_to_delete.buf == NULL) {
340 addr_to_delete.len = 0;
341 } else {
342 memcpy(addr_to_delete.buf, addr->buf, addr->len);
343 }
344 }
345 rwlock_unlock(&rpcbaddr_cache_lock);
346 if (addr_to_delete.len != 0) {
347 /*
348 * Assume this may be due to cache data being
349 * outdated
350 */
351 rwlock_wrlock(&rpcbaddr_cache_lock);
352 delete_cache(&addr_to_delete);
353 rwlock_unlock(&rpcbaddr_cache_lock);
354 free(addr_to_delete.buf);
355 }
356 if (!__rpc_nconf2sockinfo(nconf, &si)) {
357 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
358 return NULL;
359 }
360
361 memset(&hints, 0, sizeof hints);
362 hints.ai_family = si.si_af;
363 hints.ai_socktype = si.si_socktype;
364 hints.ai_protocol = si.si_proto;
365
366 #ifdef CLNT_DEBUG
367 printf("trying netid %s family %d proto %d socktype %d\n",
368 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
369 #endif
370
371 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
372 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
373 return NULL;
374 }
375
376 for (tres = res; tres != NULL; tres = tres->ai_next) {
377 taddr.buf = tres->ai_addr;
378 taddr.len = taddr.maxlen = tres->ai_addrlen;
379
380 #ifdef ND_DEBUG
381 {
382 char *ua;
383
384 ua = taddr2uaddr(nconf, &taddr);
385 fprintf(stderr, "Got it [%s]\n", ua);
386 free(ua);
387 }
388 #endif
389
390 #ifdef ND_DEBUG
391 {
392 int i;
393
394 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
395 taddr.len, taddr.maxlen);
396 fprintf(stderr, "\tAddress is ");
397 for (i = 0; i < taddr.len; i++)
398 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
399 fprintf(stderr, "\n");
400 }
401 #endif
402 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
403 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
404 #ifdef ND_DEBUG
405 if (! client) {
406 clnt_pcreateerror("rpcbind clnt interface");
407 }
408 #endif
409
410 if (client) {
411 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
412 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
413 if (targaddr)
414 *targaddr = tmpaddr;
415 break;
416 }
417 }
418 freeaddrinfo(res);
419 return (client);
420 }
421
422 /* XXX */
423 #define IN4_LOCALHOST_STRING "127.0.0.1"
424 #define IN6_LOCALHOST_STRING "::1"
425
426 /*
427 * This routine will return a client handle that is connected to the local
428 * rpcbind. Returns NULL on error and free's everything.
429 */
430 static CLIENT *
local_rpcb(void)431 local_rpcb(void)
432 {
433 CLIENT *client;
434 static struct netconfig *loopnconf;
435 static const char *hostname;
436 int sock;
437 size_t tsize;
438 struct netbuf nbuf;
439 struct sockaddr_un sun;
440
441 /*
442 * Try connecting to the local rpcbind through a local socket
443 * first. If this doesn't work, try all transports defined in
444 * the netconfig file.
445 */
446 memset(&sun, 0, sizeof sun);
447 sock = socket(AF_LOCAL, SOCK_STREAM, 0);
448 if (sock < 0)
449 goto try_nconf;
450 sun.sun_family = AF_LOCAL;
451 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
452 tsize = SUN_LEN(&sun);
453 _DIAGASSERT(__type_fit(uint8_t, tsize));
454 nbuf.len = sun.sun_len = (uint8_t)tsize;
455 nbuf.maxlen = sizeof (struct sockaddr_un);
456 nbuf.buf = &sun;
457
458 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
459 _DIAGASSERT(__type_fit(u_int, tsize));
460 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
461 (rpcvers_t)RPCBVERS, (u_int)tsize, (u_int)tsize);
462
463 if (client != NULL) {
464 /* XXX - mark the socket to be closed in destructor */
465 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
466 return client;
467 }
468
469 /* XXX - nobody needs this socket anymore, free the descriptor */
470 close(sock);
471
472 try_nconf:
473
474 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
475 mutex_lock(&loopnconf_lock);
476 if (loopnconf == NULL) {
477 struct netconfig *nconf, *tmpnconf = NULL;
478 void *nc_handle;
479 int fd;
480
481 nc_handle = setnetconfig();
482 if (nc_handle == NULL) {
483 /* fails to open netconfig file */
484 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
485 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
486 mutex_unlock(&loopnconf_lock);
487 return (NULL);
488 }
489 while ((nconf = getnetconfig(nc_handle)) != NULL) {
490 #ifdef INET6
491 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
492 #else
493 if ((
494 #endif
495 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
496 (nconf->nc_semantics == NC_TPI_COTS ||
497 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
498 fd = __rpc_nconf2fd(nconf);
499 /*
500 * Can't create a socket, assume that
501 * this family isn't configured in the kernel.
502 */
503 if (fd < 0)
504 continue;
505 close(fd);
506 tmpnconf = nconf;
507 if (!strcmp(nconf->nc_protofmly, NC_INET))
508 hostname = IN4_LOCALHOST_STRING;
509 else
510 hostname = IN6_LOCALHOST_STRING;
511 }
512 }
513 if (tmpnconf == NULL) {
514 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
515 mutex_unlock(&loopnconf_lock);
516 return (NULL);
517 }
518 loopnconf = getnetconfigent(tmpnconf->nc_netid);
519 /* loopnconf is never freed */
520 endnetconfig(nc_handle);
521 }
522 mutex_unlock(&loopnconf_lock);
523 client = getclnthandle(hostname, loopnconf, NULL);
524 return (client);
525 }
526
527 /*
528 * Set a mapping between program, version and address.
529 * Calls the rpcbind service to do the mapping.
530 */
531 bool_t
rpcb_set(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const struct netbuf * address)532 rpcb_set(rpcprog_t program, rpcvers_t version,
533 const struct netconfig *nconf, /* Network structure of transport */
534 const struct netbuf *address) /* Services netconfig address */
535 {
536 CLIENT *client;
537 bool_t rslt = FALSE;
538 RPCB parms;
539 char uidbuf[32];
540
541 /* parameter checking */
542 if (nconf == NULL) {
543 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
544 return (FALSE);
545 }
546 if (address == NULL) {
547 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
548 return (FALSE);
549 }
550 client = local_rpcb();
551 if (! client) {
552 return (FALSE);
553 }
554
555 /* convert to universal */
556 parms.r_addr = taddr2uaddr(__UNCONST(nconf), __UNCONST(address));
557 if (!parms.r_addr) {
558 CLNT_DESTROY(client);
559 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
560 return (FALSE); /* no universal address */
561 }
562 parms.r_prog = program;
563 parms.r_vers = version;
564 parms.r_netid = nconf->nc_netid;
565 /*
566 * Though uid is not being used directly, we still send it for
567 * completeness. For non-unix platforms, perhaps some other
568 * string or an empty string can be sent.
569 */
570 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
571 parms.r_owner = uidbuf;
572
573 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
574 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
575 (char *)(void *)&rslt, tottimeout) != RPC_SUCCESS) {
576 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
577 clnt_geterr(client, &rpc_createerr.cf_error);
578 }
579
580 CLNT_DESTROY(client);
581 free(parms.r_addr);
582 return (rslt);
583 }
584
585 /*
586 * Remove the mapping between program, version and netbuf address.
587 * Calls the rpcbind service to do the un-mapping.
588 * If netbuf is NULL, unset for all the transports, otherwise unset
589 * only for the given transport.
590 */
591 bool_t
rpcb_unset(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf)592 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
593 {
594 CLIENT *client;
595 bool_t rslt = FALSE;
596 RPCB parms;
597 char uidbuf[32];
598
599 client = local_rpcb();
600 if (! client) {
601 return (FALSE);
602 }
603
604 parms.r_prog = program;
605 parms.r_vers = version;
606 if (nconf)
607 parms.r_netid = nconf->nc_netid;
608 else {
609 parms.r_netid = __UNCONST(&nullstring[0]); /* unsets all */
610 }
611 parms.r_addr = __UNCONST(&nullstring[0]);
612 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
613 parms.r_owner = uidbuf;
614
615 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
616 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
617 (char *)(void *)&rslt, tottimeout) != RPC_SUCCESS) {
618 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
619 clnt_geterr(client, &rpc_createerr.cf_error);
620 }
621
622 CLNT_DESTROY(client);
623 return (rslt);
624 }
625
626 /*
627 * From the merged list, find the appropriate entry
628 */
629 static struct netbuf *
got_entry(rpcb_entry_list_ptr relp,const struct netconfig * nconf)630 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
631 {
632 struct netbuf *na = NULL;
633 rpcb_entry_list_ptr sp;
634 rpcb_entry *rmap;
635
636 _DIAGASSERT(nconf != NULL);
637
638 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
639 rmap = &sp->rpcb_entry_map;
640 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
641 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
642 (nconf->nc_semantics == rmap->r_nc_semantics) &&
643 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
644 na = uaddr2taddr(nconf, rmap->r_maddr);
645 #ifdef ND_DEBUG
646 fprintf(stderr, "\tRemote address is [%s].\n",
647 rmap->r_maddr);
648 if (!na)
649 fprintf(stderr,
650 "\tCouldn't resolve remote address!\n");
651 #endif
652 break;
653 }
654 }
655 return (na);
656 }
657
658 /*
659 * An internal function which optimizes rpcb_getaddr function. It also
660 * returns the client handle that it uses to contact the remote rpcbind.
661 *
662 * The algorithm used: If the transports is TCP or UDP, it first tries
663 * version 2 (portmap), 4 and then 3 (svr4). This order should be
664 * changed in the next OS release to 4, 2 and 3. We are assuming that by
665 * that time, version 4 would be available on many machines on the network.
666 * With this algorithm, we get performance as well as a plan for
667 * obsoleting version 2.
668 *
669 * For all other transports, the algorithm remains as 4 and then 3.
670 *
671 * XXX: Due to some problems with t_connect(), we do not reuse the same client
672 * handle for COTS cases and hence in these cases we do not return the
673 * client handle. This code will change if t_connect() ever
674 * starts working properly. Also look under clnt_vc.c.
675 */
676 struct netbuf *
__rpcb_findaddr(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const char * host,CLIENT ** clpp)677 __rpcb_findaddr(rpcprog_t program, rpcvers_t version,
678 const struct netconfig *nconf, const char *host, CLIENT **clpp)
679 {
680 CLIENT *client = NULL;
681 RPCB parms;
682 enum clnt_stat clnt_st;
683 char *ua = NULL;
684 rpcvers_t vers;
685 struct netbuf *address = NULL;
686 rpcvers_t start_vers = RPCBVERS4;
687 struct netbuf servaddr;
688
689 /* nconf is handled below */
690 _DIAGASSERT(host != NULL);
691 /* clpp may be NULL */
692
693 /* parameter checking */
694 if (nconf == NULL) {
695 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
696 return (NULL);
697 }
698
699 parms.r_addr = NULL;
700
701 #ifdef PORTMAP
702 /* Try version 2 for TCP or UDP */
703 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
704 u_short port = 0;
705 struct netbuf remote;
706 rpcvers_t pmapvers = 2;
707 struct pmap pmapparms;
708
709 /*
710 * Try UDP only - there are some portmappers out
711 * there that use UDP only.
712 */
713 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
714 struct netconfig *newnconf;
715
716 if ((newnconf = getnetconfigent("udp")) == NULL) {
717 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
718 return (NULL);
719 }
720 client = getclnthandle(host, newnconf, &parms.r_addr);
721 freenetconfigent(newnconf);
722 } else {
723 client = getclnthandle(host, nconf, &parms.r_addr);
724 }
725 if (client == NULL) {
726 return (NULL);
727 }
728
729 /* Set the version */
730 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&pmapvers);
731 pmapparms.pm_prog = program;
732 pmapparms.pm_vers = version;
733 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
734 IPPROTO_UDP : IPPROTO_TCP;
735 pmapparms.pm_port = 0; /* not needed */
736 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
737 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
738 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
739 tottimeout);
740 if (clnt_st != RPC_SUCCESS) {
741 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
742 (clnt_st == RPC_PROGUNAVAIL))
743 goto try_rpcbind; /* Try different versions */
744 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
745 clnt_geterr(client, &rpc_createerr.cf_error);
746 goto error;
747 } else if (port == 0) {
748 address = NULL;
749 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
750 goto error;
751 }
752 port = htons(port);
753 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)(void *)&remote);
754 if (((address = malloc(sizeof(struct netbuf))) == NULL) ||
755 ((address->buf = malloc(remote.len)) == NULL)) {
756 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
757 clnt_geterr(client, &rpc_createerr.cf_error);
758 if (address) {
759 free(address);
760 address = NULL;
761 }
762 goto error;
763 }
764 memcpy(address->buf, remote.buf, remote.len);
765 memcpy(&((char *)address->buf)[sizeof (short)],
766 (char *)(void *)&port, sizeof (short));
767 address->len = address->maxlen = remote.len;
768 goto done;
769 }
770 #endif
771
772 try_rpcbind:
773 /*
774 * Now we try version 4 and then 3.
775 * We also send the remote system the address we used to
776 * contact it in case it can help to connect back with us
777 */
778 parms.r_prog = program;
779 parms.r_vers = version;
780 parms.r_owner = __UNCONST(&nullstring[0]); /* not needed; */
781 /* just for xdring */
782 parms.r_netid = nconf->nc_netid; /* not really needed */
783
784 /*
785 * If a COTS transport is being used, try getting address via CLTS
786 * transport. This works only with version 4.
787 * NOTE: This is being done for all transports EXCEPT LOOPBACK
788 * because with loopback the cost to go to a COTS is same as
789 * the cost to go through CLTS, plus you get the advantage of
790 * finding out immediately if the local rpcbind process is dead.
791 */
792 #if 1
793 if ((nconf->nc_semantics == NC_TPI_COTS_ORD ||
794 nconf->nc_semantics == NC_TPI_COTS) &&
795 (strcmp(nconf->nc_protofmly, NC_LOOPBACK) != 0))
796 #else
797 if (client != NULL) {
798 CLNT_DESTROY(client);
799 client = NULL;
800 }
801 if (nconf->nc_semantics == NC_TPI_CLTS)
802 #endif
803 {
804 void *handle;
805 struct netconfig *nconf_clts;
806 rpcb_entry_list_ptr relp = NULL;
807
808 if (client == NULL) {
809 /* This did not go through the above PORTMAP/TCP code */
810 #if 1
811 if ((handle = __rpc_setconf("datagram_v")) != NULL)
812 #else
813 if ((handle = __rpc_setconf("circuit_v")) != NULL)
814 #endif
815 {
816 while ((nconf_clts = __rpc_getconf(handle))
817 != NULL) {
818 if (strcmp(nconf_clts->nc_protofmly,
819 nconf->nc_protofmly) != 0) {
820 continue;
821 }
822 client = getclnthandle(host, nconf_clts,
823 &parms.r_addr);
824 break;
825 }
826 __rpc_endconf(handle);
827 }
828 if (client == NULL)
829 goto regular_rpcbind; /* Go the regular way */
830 } else {
831 /* This is a UDP PORTMAP handle. Change to version 4 */
832 vers = RPCBVERS4;
833 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
834 }
835 /*
836 * We also send the remote system the address we used to
837 * contact it in case it can help it connect back with us
838 */
839 if (parms.r_addr == NULL) {
840 /* for XDRing */
841 parms.r_addr = __UNCONST(&nullstring[0]);
842 }
843 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
844 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
845 (xdrproc_t) xdr_rpcb_entry_list_ptr,
846 (char *)(void *)&relp, tottimeout);
847 if (clnt_st == RPC_SUCCESS) {
848 if ((address = got_entry(relp, nconf)) != NULL) {
849 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
850 (char *)(void *)&relp);
851 CLNT_CONTROL(client, CLGET_SVC_ADDR,
852 (char *)(void *)&servaddr);
853 __rpc_fixup_addr(address, &servaddr);
854 goto done;
855 }
856 /* Entry not found for this transport */
857 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
858 (char *)(void *)&relp);
859 /*
860 * XXX: should have perhaps returned with error but
861 * since the remote machine might not always be able
862 * to send the address on all transports, we try the
863 * regular way with regular_rpcbind
864 */
865 goto regular_rpcbind;
866 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
867 (clnt_st == RPC_PROGUNAVAIL)) {
868 start_vers = RPCBVERS; /* Try version 3 now */
869 goto regular_rpcbind; /* Try different versions */
870 } else {
871 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
872 clnt_geterr(client, &rpc_createerr.cf_error);
873 goto error;
874 }
875 }
876
877 regular_rpcbind:
878
879 /* Now the same transport is to be used to get the address */
880 #if 1
881 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
882 (nconf->nc_semantics == NC_TPI_COTS)))
883 #else
884 if (client && nconf->nc_semantics == NC_TPI_CLTS)
885 #endif
886 {
887 /* A CLTS type of client - destroy it */
888 CLNT_DESTROY(client);
889 client = NULL;
890 }
891
892 if (client == NULL) {
893 client = getclnthandle(host, nconf, &parms.r_addr);
894 if (client == NULL) {
895 goto error;
896 }
897 }
898 if (parms.r_addr == NULL)
899 parms.r_addr = __UNCONST(&nullstring[0]);
900
901 /* First try from start_vers and then version 3 (RPCBVERS) */
902 for (vers = start_vers; vers >= RPCBVERS; vers--) {
903 /* Set the version */
904 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
905 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
906 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
907 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua,
908 tottimeout);
909 if (clnt_st == RPC_SUCCESS) {
910 if ((ua == NULL) || (ua[0] == 0)) {
911 /* address unknown */
912 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
913 goto error;
914 }
915 address = uaddr2taddr(nconf, ua);
916 #ifdef ND_DEBUG
917 fprintf(stderr, "\tRemote address is [%s]\n", ua);
918 if (!address)
919 fprintf(stderr,
920 "\tCouldn't resolve remote address!\n");
921 #endif
922 xdr_free((xdrproc_t)xdr_wrapstring,
923 (char *)(void *)&ua);
924
925 if (! address) {
926 /* We don't know about your universal address */
927 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
928 goto error;
929 }
930 CLNT_CONTROL(client, CLGET_SVC_ADDR,
931 (char *)(void *)&servaddr);
932 __rpc_fixup_addr(address, &servaddr);
933 goto done;
934 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
935 struct rpc_err rpcerr;
936
937 clnt_geterr(client, &rpcerr);
938 if (rpcerr.re_vers.low > RPCBVERS4)
939 goto error; /* a new version, can't handle */
940 } else if (clnt_st != RPC_PROGUNAVAIL) {
941 /* Cant handle this error */
942 rpc_createerr.cf_stat = clnt_st;
943 clnt_geterr(client, &rpc_createerr.cf_error);
944 goto error;
945 }
946 }
947
948 error:
949 if (client) {
950 CLNT_DESTROY(client);
951 client = NULL;
952 }
953 done:
954 if (nconf->nc_semantics != NC_TPI_CLTS) {
955 /* This client is the connectionless one */
956 if (client) {
957 CLNT_DESTROY(client);
958 client = NULL;
959 }
960 }
961 if (clpp) {
962 *clpp = client;
963 } else if (client) {
964 CLNT_DESTROY(client);
965 }
966 return (address);
967 }
968
969
970 /*
971 * Find the mapped address for program, version.
972 * Calls the rpcbind service remotely to do the lookup.
973 * Uses the transport specified in nconf.
974 * Returns FALSE (0) if no map exists, else returns 1.
975 *
976 * Assuming that the address is all properly allocated
977 */
978 bool_t
rpcb_getaddr(const rpcprog_t program,const rpcvers_t version,const struct netconfig * nconf,struct netbuf * address,const char * host)979 rpcb_getaddr(const rpcprog_t program, const rpcvers_t version,
980 const struct netconfig *nconf, struct netbuf *address,
981 const char *host)
982 {
983 struct netbuf *na;
984
985 _DIAGASSERT(address != NULL);
986
987 if ((na = __rpcb_findaddr(program, version, nconf,
988 host, NULL)) == NULL)
989 return (FALSE);
990
991 if (na->len > address->maxlen) {
992 /* Too long address */
993 free(na->buf);
994 free(na);
995 rpc_createerr.cf_stat = RPC_FAILED;
996 return (FALSE);
997 }
998 memcpy(address->buf, na->buf, (size_t)na->len);
999 address->len = na->len;
1000 free(na->buf);
1001 free(na);
1002 return (TRUE);
1003 }
1004
1005 /*
1006 * Get a copy of the current maps.
1007 * Calls the rpcbind service remotely to get the maps.
1008 *
1009 * It returns only a list of the services
1010 * It returns NULL on failure.
1011 */
1012 rpcblist *
rpcb_getmaps(const struct netconfig * nconf,const char * host)1013 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1014 {
1015 rpcblist_ptr head = NULL;
1016 CLIENT *client;
1017 enum clnt_stat clnt_st;
1018 rpcvers_t vers = 0;
1019
1020 client = getclnthandle(host, nconf, NULL);
1021 if (client == NULL) {
1022 return (head);
1023 }
1024 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1025 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1026 (char *)(void *)&head, tottimeout);
1027 if (clnt_st == RPC_SUCCESS)
1028 goto done;
1029
1030 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1031 (clnt_st != RPC_PROGUNAVAIL)) {
1032 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1033 clnt_geterr(client, &rpc_createerr.cf_error);
1034 goto done;
1035 }
1036
1037 /* fall back to earlier version */
1038 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1039 if (vers == RPCBVERS4) {
1040 vers = RPCBVERS;
1041 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1042 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1043 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1044 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1045 goto done;
1046 }
1047 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1048 clnt_geterr(client, &rpc_createerr.cf_error);
1049
1050 done:
1051 CLNT_DESTROY(client);
1052 return (head);
1053 }
1054
1055 /*
1056 * rpcbinder remote-call-service interface.
1057 * This routine is used to call the rpcbind remote call service
1058 * which will look up a service program in the address maps, and then
1059 * remotely call that routine with the given parameters. This allows
1060 * programs to do a lookup and call in one step.
1061 */
1062 enum clnt_stat
rpcb_rmtcall(const struct netconfig * nconf,const char * host,rpcprog_t prog,rpcvers_t vers,rpcproc_t proc,xdrproc_t xdrargs,const char * argsp,xdrproc_t xdrres,caddr_t resp,struct timeval tout,const struct netbuf * addr_ptr)1063 rpcb_rmtcall(
1064 const struct netconfig *nconf, /* Netconfig structure */
1065 const char *host, /* Remote host name */
1066 rpcprog_t prog,
1067 rpcvers_t vers,
1068 rpcproc_t proc, /* Remote proc identifiers */
1069 xdrproc_t xdrargs,
1070 const char *argsp, /* Argument */
1071 xdrproc_t xdrres, /* XDR routines */
1072 caddr_t resp, /* Result */
1073 struct timeval tout, /* Timeout value for this call */
1074 const struct netbuf *addr_ptr) /* Preallocated netbuf address */
1075 {
1076 CLIENT *client;
1077 enum clnt_stat stat;
1078 struct r_rpcb_rmtcallargs a;
1079 struct r_rpcb_rmtcallres r;
1080 rpcvers_t rpcb_vers;
1081
1082 stat = RPC_FAILED; /* XXXGCC -Wuninitialized [dreamcast] */
1083
1084 client = getclnthandle(host, nconf, NULL);
1085 if (client == NULL) {
1086 return (RPC_FAILED);
1087 }
1088 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, __UNCONST(&rmttimeout));
1089 a.prog = prog;
1090 a.vers = vers;
1091 a.proc = proc;
1092 a.args.args_val = argsp;
1093 a.xdr_args = xdrargs;
1094 r.addr = NULL;
1095 r.results.results_val = resp;
1096 r.xdr_res = xdrres;
1097
1098 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1099 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1100 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1101 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1102 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1103 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1104 struct netbuf *na;
1105 na = uaddr2taddr(__UNCONST(nconf), r.addr);
1106 if (!na) {
1107 stat = RPC_N2AXLATEFAILURE;
1108 ((struct netbuf *)__UNCONST(addr_ptr))->len = 0;
1109 goto error;
1110 }
1111 if (na->len > addr_ptr->maxlen) {
1112 /* Too long address */
1113 stat = RPC_FAILED; /* XXX A better error no */
1114 free(na->buf);
1115 free(na);
1116 ((struct netbuf *)__UNCONST(addr_ptr))->len = 0;
1117 goto error;
1118 }
1119 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1120 ((struct netbuf *)__UNCONST(addr_ptr))->len = na->len;
1121 free(na->buf);
1122 free(na);
1123 break;
1124 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1125 (stat != RPC_PROGUNAVAIL)) {
1126 goto error;
1127 }
1128 }
1129 error:
1130 CLNT_DESTROY(client);
1131 if (r.addr)
1132 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1133 return (stat);
1134 }
1135
1136 /*
1137 * Gets the time on the remote host.
1138 * Returns 1 if succeeds else 0.
1139 */
1140 bool_t
rpcb_gettime(const char * host,time_t * timep)1141 rpcb_gettime(const char *host, time_t *timep)
1142 {
1143 CLIENT *client = NULL;
1144 void *handle;
1145 struct netconfig *nconf;
1146 rpcvers_t vers;
1147 enum clnt_stat st;
1148
1149
1150 if ((host == NULL) || (host[0] == 0)) {
1151 time(timep);
1152 return (TRUE);
1153 }
1154
1155 if ((handle = __rpc_setconf("netpath")) == NULL) {
1156 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1157 return (FALSE);
1158 }
1159 rpc_createerr.cf_stat = RPC_SUCCESS;
1160 while (client == NULL) {
1161 if ((nconf = __rpc_getconf(handle)) == NULL) {
1162 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1163 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1164 break;
1165 }
1166 client = getclnthandle(host, nconf, NULL);
1167 if (client)
1168 break;
1169 }
1170 __rpc_endconf(handle);
1171 if (client == NULL) {
1172 return (FALSE);
1173 }
1174
1175 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1176 (xdrproc_t) xdr_void, NULL,
1177 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1178
1179 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1180 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1181 if (vers == RPCBVERS4) {
1182 /* fall back to earlier version */
1183 vers = RPCBVERS;
1184 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1185 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1186 (xdrproc_t) xdr_void, NULL,
1187 (xdrproc_t) xdr_int, (char *)(void *)timep,
1188 tottimeout);
1189 }
1190 }
1191 CLNT_DESTROY(client);
1192 return (st == RPC_SUCCESS? TRUE: FALSE);
1193 }
1194
1195 /*
1196 * Converts taddr to universal address. This routine should never
1197 * really be called because local n2a libraries are always provided.
1198 */
1199 char *
rpcb_taddr2uaddr(struct netconfig * nconf,struct netbuf * taddr)1200 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1201 {
1202 CLIENT *client;
1203 char *uaddr = NULL;
1204
1205 /* parameter checking */
1206 if (nconf == NULL) {
1207 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1208 return (NULL);
1209 }
1210 if (taddr == NULL) {
1211 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1212 return (NULL);
1213 }
1214 client = local_rpcb();
1215 if (! client) {
1216 return (NULL);
1217 }
1218
1219 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1220 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1221 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout)
1222 != RPC_SUCCESS) {
1223 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
1224 clnt_geterr(client, &rpc_createerr.cf_error);
1225 }
1226 CLNT_DESTROY(client);
1227 return (uaddr);
1228 }
1229
1230 /*
1231 * Converts universal address to netbuf. This routine should never
1232 * really be called because local n2a libraries are always provided.
1233 */
1234 struct netbuf *
rpcb_uaddr2taddr(struct netconfig * nconf,char * uaddr)1235 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1236 {
1237 CLIENT *client;
1238 struct netbuf *taddr;
1239
1240
1241 /* parameter checking */
1242 if (nconf == NULL) {
1243 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1244 return (NULL);
1245 }
1246 if (uaddr == NULL) {
1247 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1248 return (NULL);
1249 }
1250 client = local_rpcb();
1251 if (! client) {
1252 return (NULL);
1253 }
1254
1255 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1256 if (taddr == NULL) {
1257 CLNT_DESTROY(client);
1258 return (NULL);
1259 }
1260 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1261 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1262 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1263 tottimeout) != RPC_SUCCESS) {
1264 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
1265 clnt_geterr(client, &rpc_createerr.cf_error);
1266 free(taddr);
1267 taddr = NULL;
1268 }
1269 CLNT_DESTROY(client);
1270 return (taddr);
1271 }
1272