1 /* $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 2010, Oracle America, Inc.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials 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 "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * rpcb_clnt.c
35 * interface to rpcbind rpc service.
36 */
37
38 #include "namespace.h"
39 #include "reentrant.h"
40 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <sys/un.h>
43 #include <sys/utsname.h>
44 #include <rpc/rpc.h>
45 #include <rpc/rpcb_prot.h>
46 #include <rpc/nettype.h>
47 #include <netconfig.h>
48 #ifdef PORTMAP
49 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
50 #include <rpc/pmap_prot.h>
51 #endif /* PORTMAP */
52 #include <stdio.h>
53 #include <errno.h>
54 #include <stdlib.h>
55 #include <string.h>
56 #include <unistd.h>
57 #include <netdb.h>
58 #include <syslog.h>
59 #include "un-namespace.h"
60
61 #include "rpc_com.h"
62 #include "mt_misc.h"
63
64 static struct timeval tottimeout = { 60, 0 };
65 static const struct timeval rmttimeout = { 3, 0 };
66 static struct timeval rpcbrmttime = { 15, 0 };
67
68 extern bool_t xdr_wrapstring(XDR *, char **);
69
70 static const char nullstring[] = "\000";
71
72 #define CACHESIZE 6
73
74 struct address_cache {
75 char *ac_host;
76 char *ac_netid;
77 char *ac_uaddr;
78 struct netbuf *ac_taddr;
79 struct address_cache *ac_next;
80 };
81
82 static struct address_cache *front;
83 static int cachesize;
84
85 #define CLCR_GET_RPCB_TIMEOUT 1
86 #define CLCR_SET_RPCB_TIMEOUT 2
87
88
89 extern int __rpc_lowvers;
90
91 static struct address_cache *check_cache(const char *, const char *);
92 static void delete_cache(struct netbuf *);
93 static void add_cache(const char *, const char *, struct netbuf *, char *);
94 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
95 static CLIENT *local_rpcb(void);
96 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
97
98 /*
99 * This routine adjusts the timeout used for calls to the remote rpcbind.
100 * Also, this routine can be used to set the use of portmapper version 2
101 * only when doing rpc_broadcasts
102 * These are private routines that may not be provided in future releases.
103 */
104 bool_t
__rpc_control(int request,void * info)105 __rpc_control(int request, void *info)
106 {
107 switch (request) {
108 case CLCR_GET_RPCB_TIMEOUT:
109 *(struct timeval *)info = tottimeout;
110 break;
111 case CLCR_SET_RPCB_TIMEOUT:
112 tottimeout = *(struct timeval *)info;
113 break;
114 case CLCR_SET_LOWVERS:
115 __rpc_lowvers = *(int *)info;
116 break;
117 case CLCR_GET_LOWVERS:
118 *(int *)info = __rpc_lowvers;
119 break;
120 default:
121 return (FALSE);
122 }
123 return (TRUE);
124 }
125
126 /*
127 * It might seem that a reader/writer lock would be more reasonable here.
128 * However because getclnthandle(), the only user of the cache functions,
129 * may do a delete_cache() operation if a check_cache() fails to return an
130 * address useful to clnt_tli_create(), we may as well use a mutex.
131 */
132 /*
133 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
134 * block all clnt_create's if we are trying to connect to a host that's down,
135 * since the lock will be held all during that time.
136 */
137
138 /*
139 * The routines check_cache(), add_cache(), delete_cache() manage the
140 * cache of rpcbind addresses for (host, netid).
141 */
142
143 static struct address_cache *
check_cache(const char * host,const char * netid)144 check_cache(const char *host, const char *netid)
145 {
146 struct address_cache *cptr;
147
148 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
149
150 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
151 if (!strcmp(cptr->ac_host, host) &&
152 !strcmp(cptr->ac_netid, netid)) {
153 #ifdef ND_DEBUG
154 fprintf(stderr, "Found cache entry for %s: %s\n",
155 host, netid);
156 #endif
157 return (cptr);
158 }
159 }
160 return ((struct address_cache *) NULL);
161 }
162
163 static void
delete_cache(struct netbuf * addr)164 delete_cache(struct netbuf *addr)
165 {
166 struct address_cache *cptr, *prevptr = NULL;
167
168 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
169 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
170 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
171 free(cptr->ac_host);
172 free(cptr->ac_netid);
173 free(cptr->ac_taddr->buf);
174 free(cptr->ac_taddr);
175 free(cptr->ac_uaddr);
176 if (prevptr)
177 prevptr->ac_next = cptr->ac_next;
178 else
179 front = cptr->ac_next;
180 free(cptr);
181 cachesize--;
182 break;
183 }
184 prevptr = cptr;
185 }
186 }
187
188 static void
add_cache(const char * host,const char * netid,struct netbuf * taddr,char * uaddr)189 add_cache(const char *host, const char *netid, struct netbuf *taddr,
190 char *uaddr)
191 {
192 struct address_cache *ad_cache, *cptr, *prevptr;
193
194 ad_cache = (struct address_cache *)
195 malloc(sizeof (struct address_cache));
196 if (!ad_cache) {
197 return;
198 }
199 ad_cache->ac_host = strdup(host);
200 ad_cache->ac_netid = strdup(netid);
201 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
202 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
203 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
204 (uaddr && !ad_cache->ac_uaddr)) {
205 goto out;
206 }
207 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
208 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
209 if (ad_cache->ac_taddr->buf == NULL) {
210 out:
211 free(ad_cache->ac_host);
212 free(ad_cache->ac_netid);
213 free(ad_cache->ac_uaddr);
214 free(ad_cache->ac_taddr);
215 free(ad_cache);
216 return;
217 }
218 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
219 #ifdef ND_DEBUG
220 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
221 #endif
222
223 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
224
225 rwlock_wrlock(&rpcbaddr_cache_lock);
226 if (cachesize < CACHESIZE) {
227 ad_cache->ac_next = front;
228 front = ad_cache;
229 cachesize++;
230 } else {
231 /* Free the last entry */
232 cptr = front;
233 prevptr = NULL;
234 while (cptr->ac_next) {
235 prevptr = cptr;
236 cptr = cptr->ac_next;
237 }
238
239 #ifdef ND_DEBUG
240 fprintf(stderr, "Deleted from cache: %s : %s\n",
241 cptr->ac_host, cptr->ac_netid);
242 #endif
243 free(cptr->ac_host);
244 free(cptr->ac_netid);
245 free(cptr->ac_taddr->buf);
246 free(cptr->ac_taddr);
247 free(cptr->ac_uaddr);
248
249 if (prevptr) {
250 prevptr->ac_next = NULL;
251 ad_cache->ac_next = front;
252 front = ad_cache;
253 } else {
254 front = ad_cache;
255 ad_cache->ac_next = NULL;
256 }
257 free(cptr);
258 }
259 rwlock_unlock(&rpcbaddr_cache_lock);
260 }
261
262 /*
263 * This routine will return a client handle that is connected to the
264 * rpcbind. If targaddr is non-NULL, the "universal address" of the
265 * host will be stored in *targaddr; the caller is responsible for
266 * freeing this string.
267 * On error, returns NULL and free's everything.
268 */
269 static CLIENT *
getclnthandle(const char * host,const struct netconfig * nconf,char ** targaddr)270 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
271 {
272 CLIENT *client;
273 struct netbuf *addr, taddr;
274 struct netbuf addr_to_delete;
275 struct __rpc_sockinfo si;
276 struct addrinfo hints, *res, *tres;
277 struct address_cache *ad_cache;
278 char *tmpaddr;
279
280 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
281
282 /* Get the address of the rpcbind. Check cache first */
283 client = NULL;
284 addr_to_delete.len = 0;
285 rwlock_rdlock(&rpcbaddr_cache_lock);
286 ad_cache = NULL;
287 if (host != NULL)
288 ad_cache = check_cache(host, nconf->nc_netid);
289 if (ad_cache != NULL) {
290 addr = ad_cache->ac_taddr;
291 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
292 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
293 if (client != NULL) {
294 if (targaddr)
295 *targaddr = strdup(ad_cache->ac_uaddr);
296 rwlock_unlock(&rpcbaddr_cache_lock);
297 return (client);
298 }
299 addr_to_delete.len = addr->len;
300 addr_to_delete.buf = (char *)malloc(addr->len);
301 if (addr_to_delete.buf == NULL) {
302 addr_to_delete.len = 0;
303 } else {
304 memcpy(addr_to_delete.buf, addr->buf, addr->len);
305 }
306 }
307 rwlock_unlock(&rpcbaddr_cache_lock);
308 if (addr_to_delete.len != 0) {
309 /*
310 * Assume this may be due to cache data being
311 * outdated
312 */
313 rwlock_wrlock(&rpcbaddr_cache_lock);
314 delete_cache(&addr_to_delete);
315 rwlock_unlock(&rpcbaddr_cache_lock);
316 free(addr_to_delete.buf);
317 }
318 if (!__rpc_nconf2sockinfo(nconf, &si)) {
319 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
320 return NULL;
321 }
322
323 memset(&hints, 0, sizeof hints);
324 hints.ai_family = si.si_af;
325 hints.ai_socktype = si.si_socktype;
326 hints.ai_protocol = si.si_proto;
327
328 #ifdef CLNT_DEBUG
329 printf("trying netid %s family %d proto %d socktype %d\n",
330 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
331 #endif
332
333 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
334 client = local_rpcb();
335 if (! client) {
336 #ifdef ND_DEBUG
337 clnt_pcreateerror("rpcbind clnt interface");
338 #endif
339 return (NULL);
340 } else {
341 struct sockaddr_un sun;
342 if (targaddr) {
343 *targaddr = malloc(sizeof(sun.sun_path));
344 if (*targaddr == NULL) {
345 CLNT_DESTROY(client);
346 return (NULL);
347 }
348 strncpy(*targaddr, _PATH_RPCBINDSOCK,
349 sizeof(sun.sun_path));
350 }
351 return (client);
352 }
353 } else {
354 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
355 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
356 return NULL;
357 }
358 }
359
360 for (tres = res; tres != NULL; tres = tres->ai_next) {
361 taddr.buf = tres->ai_addr;
362 taddr.len = taddr.maxlen = tres->ai_addrlen;
363
364 #ifdef ND_DEBUG
365 {
366 char *ua;
367
368 ua = taddr2uaddr(nconf, &taddr);
369 fprintf(stderr, "Got it [%s]\n", ua);
370 free(ua);
371 }
372 #endif
373
374 #ifdef ND_DEBUG
375 {
376 int i;
377
378 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
379 taddr.len, taddr.maxlen);
380 fprintf(stderr, "\tAddress is ");
381 for (i = 0; i < taddr.len; i++)
382 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
383 fprintf(stderr, "\n");
384 }
385 #endif
386 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
387 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
388 #ifdef ND_DEBUG
389 if (! client) {
390 clnt_pcreateerror("rpcbind clnt interface");
391 }
392 #endif
393
394 if (client) {
395 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
396 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
397 if (targaddr)
398 *targaddr = tmpaddr;
399 break;
400 }
401 }
402 if (res)
403 freeaddrinfo(res);
404 return (client);
405 }
406
407 /* XXX */
408 #define IN4_LOCALHOST_STRING "127.0.0.1"
409 #define IN6_LOCALHOST_STRING "::1"
410
411 /*
412 * This routine will return a client handle that is connected to the local
413 * rpcbind. Returns NULL on error and free's everything.
414 */
415 static CLIENT *
local_rpcb(void)416 local_rpcb(void)
417 {
418 CLIENT *client;
419 static struct netconfig *loopnconf;
420 static char *hostname;
421 int sock;
422 size_t tsize;
423 struct netbuf nbuf;
424 struct sockaddr_un sun;
425
426 /*
427 * Try connecting to the local rpcbind through a local socket
428 * first. If this doesn't work, try all transports defined in
429 * the netconfig file.
430 */
431 memset(&sun, 0, sizeof sun);
432 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
433 if (sock < 0)
434 goto try_nconf;
435 sun.sun_family = AF_LOCAL;
436 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
437 nbuf.len = sun.sun_len = SUN_LEN(&sun);
438 nbuf.maxlen = sizeof (struct sockaddr_un);
439 nbuf.buf = &sun;
440
441 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
442 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
443 (rpcvers_t)RPCBVERS, tsize, tsize);
444
445 if (client != NULL) {
446 /* Mark the socket to be closed in destructor */
447 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
448 return client;
449 }
450
451 /* Nobody needs this socket anymore; free the descriptor. */
452 _close(sock);
453
454 try_nconf:
455
456 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
457 mutex_lock(&loopnconf_lock);
458 if (loopnconf == NULL) {
459 struct netconfig *nconf, *tmpnconf = NULL;
460 void *nc_handle;
461 int fd;
462
463 nc_handle = setnetconfig();
464 if (nc_handle == NULL) {
465 /* fails to open netconfig file */
466 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
467 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
468 mutex_unlock(&loopnconf_lock);
469 return (NULL);
470 }
471 while ((nconf = getnetconfig(nc_handle)) != NULL) {
472 #ifdef INET6
473 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
474 #else
475 if ((
476 #endif
477 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
478 (nconf->nc_semantics == NC_TPI_COTS ||
479 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
480 fd = __rpc_nconf2fd(nconf);
481 /*
482 * Can't create a socket, assume that
483 * this family isn't configured in the kernel.
484 */
485 if (fd < 0)
486 continue;
487 _close(fd);
488 tmpnconf = nconf;
489 if (!strcmp(nconf->nc_protofmly, NC_INET))
490 hostname = IN4_LOCALHOST_STRING;
491 else
492 hostname = IN6_LOCALHOST_STRING;
493 }
494 }
495 if (tmpnconf == NULL) {
496 endnetconfig(nc_handle);
497 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
498 mutex_unlock(&loopnconf_lock);
499 return (NULL);
500 }
501 loopnconf = getnetconfigent(tmpnconf->nc_netid);
502 /* loopnconf is never freed */
503 endnetconfig(nc_handle);
504 }
505 mutex_unlock(&loopnconf_lock);
506 client = getclnthandle(hostname, loopnconf, NULL);
507 return (client);
508 }
509
510 /*
511 * Set a mapping between program, version and address.
512 * Calls the rpcbind service to do the mapping.
513 *
514 * nconf - Network structure of transport
515 * address - Services netconfig address
516 */
517 bool_t
rpcb_set(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const struct netbuf * address)518 rpcb_set(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
519 const struct netbuf *address)
520 {
521 CLIENT *client;
522 bool_t rslt = FALSE;
523 RPCB parms;
524 char uidbuf[32];
525
526 /* parameter checking */
527 if (nconf == NULL) {
528 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
529 return (FALSE);
530 }
531 if (address == NULL) {
532 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
533 return (FALSE);
534 }
535 client = local_rpcb();
536 if (! client) {
537 return (FALSE);
538 }
539
540 /* convert to universal */
541 /*LINTED const castaway*/
542 parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
543 (struct netbuf *)address);
544 if (!parms.r_addr) {
545 CLNT_DESTROY(client);
546 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
547 return (FALSE); /* no universal address */
548 }
549 parms.r_prog = program;
550 parms.r_vers = version;
551 parms.r_netid = nconf->nc_netid;
552 /*
553 * Though uid is not being used directly, we still send it for
554 * completeness. For non-unix platforms, perhaps some other
555 * string or an empty string can be sent.
556 */
557 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
558 parms.r_owner = uidbuf;
559
560 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
561 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
562 (char *)(void *)&rslt, tottimeout);
563
564 CLNT_DESTROY(client);
565 free(parms.r_addr);
566 return (rslt);
567 }
568
569 /*
570 * Remove the mapping between program, version and netbuf address.
571 * Calls the rpcbind service to do the un-mapping.
572 * If netbuf is NULL, unset for all the transports, otherwise unset
573 * only for the given transport.
574 */
575 bool_t
rpcb_unset(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf)576 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
577 {
578 CLIENT *client;
579 bool_t rslt = FALSE;
580 RPCB parms;
581 char uidbuf[32];
582
583 client = local_rpcb();
584 if (! client) {
585 return (FALSE);
586 }
587
588 parms.r_prog = program;
589 parms.r_vers = version;
590 if (nconf)
591 parms.r_netid = nconf->nc_netid;
592 else {
593 /*LINTED const castaway*/
594 parms.r_netid = (char *) &nullstring[0]; /* unsets all */
595 }
596 /*LINTED const castaway*/
597 parms.r_addr = (char *) &nullstring[0];
598 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
599 parms.r_owner = uidbuf;
600
601 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
602 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
603 (char *)(void *)&rslt, tottimeout);
604
605 CLNT_DESTROY(client);
606 return (rslt);
607 }
608
609 /*
610 * From the merged list, find the appropriate entry
611 */
612 static struct netbuf *
got_entry(rpcb_entry_list_ptr relp,const struct netconfig * nconf)613 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
614 {
615 struct netbuf *na = NULL;
616 rpcb_entry_list_ptr sp;
617 rpcb_entry *rmap;
618
619 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
620 rmap = &sp->rpcb_entry_map;
621 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
622 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
623 (nconf->nc_semantics == rmap->r_nc_semantics) &&
624 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
625 na = uaddr2taddr(nconf, rmap->r_maddr);
626 #ifdef ND_DEBUG
627 fprintf(stderr, "\tRemote address is [%s].\n",
628 rmap->r_maddr);
629 if (!na)
630 fprintf(stderr,
631 "\tCouldn't resolve remote address!\n");
632 #endif
633 break;
634 }
635 }
636 return (na);
637 }
638
639 /*
640 * Quick check to see if rpcbind is up. Tries to connect over
641 * local transport.
642 */
643 static bool_t
__rpcbind_is_up(void)644 __rpcbind_is_up(void)
645 {
646 struct netconfig *nconf;
647 struct sockaddr_un sun;
648 void *localhandle;
649 int sock;
650
651 nconf = NULL;
652 localhandle = setnetconfig();
653 while ((nconf = getnetconfig(localhandle)) != NULL) {
654 if (nconf->nc_protofmly != NULL &&
655 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
656 break;
657 }
658 endnetconfig(localhandle);
659
660 if (nconf == NULL)
661 return (FALSE);
662
663 memset(&sun, 0, sizeof sun);
664 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
665 if (sock < 0)
666 return (FALSE);
667 sun.sun_family = AF_LOCAL;
668 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
669 sun.sun_len = SUN_LEN(&sun);
670
671 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
672 _close(sock);
673 return (FALSE);
674 }
675
676 _close(sock);
677 return (TRUE);
678 }
679
680 /*
681 * An internal function which optimizes rpcb_getaddr function. It also
682 * returns the client handle that it uses to contact the remote rpcbind.
683 *
684 * The algorithm used: If the transports is TCP or UDP, it first tries
685 * version 2 (portmap), 4 and then 3 (svr4). This order should be
686 * changed in the next OS release to 4, 2 and 3. We are assuming that by
687 * that time, version 4 would be available on many machines on the network.
688 * With this algorithm, we get performance as well as a plan for
689 * obsoleting version 2.
690 *
691 * For all other transports, the algorithm remains as 4 and then 3.
692 *
693 * XXX: Due to some problems with t_connect(), we do not reuse the same client
694 * handle for COTS cases and hence in these cases we do not return the
695 * client handle. This code will change if t_connect() ever
696 * starts working properly. Also look under clnt_vc.c.
697 */
698 struct netbuf *
__rpcb_findaddr_timed(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const char * host,CLIENT ** clpp,struct timeval * tp)699 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
700 const struct netconfig *nconf, const char *host,
701 CLIENT **clpp, struct timeval *tp)
702 {
703 static bool_t check_rpcbind = TRUE;
704 CLIENT *client = NULL;
705 RPCB parms;
706 enum clnt_stat clnt_st;
707 char *ua = NULL;
708 rpcvers_t vers;
709 struct netbuf *address = NULL;
710 rpcvers_t start_vers = RPCBVERS4;
711 struct netbuf servaddr;
712
713 /* parameter checking */
714 if (nconf == NULL) {
715 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
716 return (NULL);
717 }
718
719 parms.r_addr = NULL;
720
721 /*
722 * Use default total timeout if no timeout is specified.
723 */
724 if (tp == NULL)
725 tp = &tottimeout;
726
727 #ifdef PORTMAP
728 /* Try version 2 for TCP or UDP */
729 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
730 u_short port = 0;
731 struct netbuf remote;
732 rpcvers_t pmapvers = 2;
733 struct pmap pmapparms;
734
735 /*
736 * The comment below is now very old, having
737 * been committed to FreeBSD during an import
738 * from NetBSD in 2001. I do not believe there
739 * will still be any rpcbind servers that do
740 * UDP only and, since Azure requires use of
741 * TCP for NFSv3 mounts, comment this out
742 * so that NFSv3 mounts on Azure can work.
743 */
744 #ifdef notnow
745 /*
746 * Try UDP only - there are some portmappers out
747 * there that use UDP only.
748 */
749 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
750 struct netconfig *newnconf;
751
752 if ((newnconf = getnetconfigent("udp")) == NULL) {
753 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
754 return (NULL);
755 }
756 client = getclnthandle(host, newnconf, &parms.r_addr);
757 freenetconfigent(newnconf);
758 } else
759 #endif
760 client = getclnthandle(host, nconf, &parms.r_addr);
761 if (client == NULL)
762 return (NULL);
763
764 /*
765 * Set version and retry timeout.
766 */
767 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
768 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
769
770 pmapparms.pm_prog = program;
771 pmapparms.pm_vers = version;
772 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
773 IPPROTO_UDP : IPPROTO_TCP;
774 pmapparms.pm_port = 0; /* not needed */
775 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
776 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
777 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
778 *tp);
779 if (clnt_st != RPC_SUCCESS) {
780 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
781 (clnt_st == RPC_PROGUNAVAIL))
782 goto try_rpcbind; /* Try different versions */
783 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
784 clnt_geterr(client, &rpc_createerr.cf_error);
785 goto error;
786 } else if (port == 0) {
787 address = NULL;
788 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
789 goto error;
790 }
791 port = htons(port);
792 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
793 if (((address = (struct netbuf *)
794 malloc(sizeof (struct netbuf))) == NULL) ||
795 ((address->buf = (char *)
796 malloc(remote.len)) == NULL)) {
797 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
798 clnt_geterr(client, &rpc_createerr.cf_error);
799 free(address);
800 address = NULL;
801 goto error;
802 }
803 memcpy(address->buf, remote.buf, remote.len);
804 memcpy(&((char *)address->buf)[sizeof (short)],
805 (char *)(void *)&port, sizeof (short));
806 address->len = address->maxlen = remote.len;
807 goto done;
808 }
809 #endif /* PORTMAP */
810
811 try_rpcbind:
812 /*
813 * Check if rpcbind is up. This prevents needless delays when
814 * accessing applications such as the keyserver while booting
815 * disklessly.
816 */
817 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
818 if (!__rpcbind_is_up()) {
819 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
820 rpc_createerr.cf_error.re_errno = 0;
821 goto error;
822 }
823 check_rpcbind = FALSE;
824 }
825
826 /*
827 * Now we try version 4 and then 3.
828 * We also send the remote system the address we used to
829 * contact it in case it can help to connect back with us
830 */
831 parms.r_prog = program;
832 parms.r_vers = version;
833 /*LINTED const castaway*/
834 parms.r_owner = (char *) &nullstring[0]; /* not needed; */
835 /* just for xdring */
836 parms.r_netid = nconf->nc_netid; /* not really needed */
837
838 /*
839 * If a COTS transport is being used, try getting address via CLTS
840 * transport. This works only with version 4.
841 */
842 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
843 nconf->nc_semantics == NC_TPI_COTS) {
844
845 void *handle;
846 struct netconfig *nconf_clts;
847 rpcb_entry_list_ptr relp = NULL;
848
849 if (client == NULL) {
850 /* This did not go through the above PORTMAP/TCP code */
851 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
852 while ((nconf_clts = __rpc_getconf(handle))
853 != NULL) {
854 if (strcmp(nconf_clts->nc_protofmly,
855 nconf->nc_protofmly) != 0) {
856 continue;
857 }
858 client = getclnthandle(host, nconf_clts,
859 &parms.r_addr);
860 break;
861 }
862 __rpc_endconf(handle);
863 }
864 if (client == NULL)
865 goto regular_rpcbind; /* Go the regular way */
866 } else {
867 /* This is a UDP PORTMAP handle. Change to version 4 */
868 vers = RPCBVERS4;
869 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
870 }
871 /*
872 * We also send the remote system the address we used to
873 * contact it in case it can help it connect back with us
874 */
875 if (parms.r_addr == NULL) {
876 /*LINTED const castaway*/
877 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
878 }
879
880 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
881
882 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
883 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
884 (xdrproc_t) xdr_rpcb_entry_list_ptr,
885 (char *)(void *)&relp, *tp);
886 if (clnt_st == RPC_SUCCESS) {
887 if ((address = got_entry(relp, nconf)) != NULL) {
888 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
889 (char *)(void *)&relp);
890 CLNT_CONTROL(client, CLGET_SVC_ADDR,
891 (char *)(void *)&servaddr);
892 __rpc_fixup_addr(address, &servaddr);
893 goto done;
894 }
895 /* Entry not found for this transport */
896 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
897 (char *)(void *)&relp);
898 /*
899 * XXX: should have perhaps returned with error but
900 * since the remote machine might not always be able
901 * to send the address on all transports, we try the
902 * regular way with regular_rpcbind
903 */
904 goto regular_rpcbind;
905 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
906 (clnt_st == RPC_PROGUNAVAIL)) {
907 start_vers = RPCBVERS; /* Try version 3 now */
908 goto regular_rpcbind; /* Try different versions */
909 } else {
910 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
911 clnt_geterr(client, &rpc_createerr.cf_error);
912 goto error;
913 }
914 }
915
916 regular_rpcbind:
917
918 /* Now the same transport is to be used to get the address */
919 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
920 (nconf->nc_semantics == NC_TPI_COTS))) {
921 /* A CLTS type of client - destroy it */
922 CLNT_DESTROY(client);
923 client = NULL;
924 }
925
926 if (client == NULL) {
927 client = getclnthandle(host, nconf, &parms.r_addr);
928 if (client == NULL) {
929 goto error;
930 }
931 }
932 if (parms.r_addr == NULL) {
933 /*LINTED const castaway*/
934 parms.r_addr = (char *) &nullstring[0];
935 }
936
937 /* First try from start_vers and then version 3 (RPCBVERS) */
938
939 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
940 for (vers = start_vers; vers >= RPCBVERS; vers--) {
941 /* Set the version */
942 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
943 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
944 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
945 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
946 if (clnt_st == RPC_SUCCESS) {
947 if ((ua == NULL) || (ua[0] == 0)) {
948 /* address unknown */
949 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
950 goto error;
951 }
952 address = uaddr2taddr(nconf, ua);
953 #ifdef ND_DEBUG
954 fprintf(stderr, "\tRemote address is [%s]\n", ua);
955 if (!address)
956 fprintf(stderr,
957 "\tCouldn't resolve remote address!\n");
958 #endif
959 xdr_free((xdrproc_t)xdr_wrapstring,
960 (char *)(void *)&ua);
961
962 if (! address) {
963 /* We don't know about your universal address */
964 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
965 goto error;
966 }
967 CLNT_CONTROL(client, CLGET_SVC_ADDR,
968 (char *)(void *)&servaddr);
969 __rpc_fixup_addr(address, &servaddr);
970 goto done;
971 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
972 struct rpc_err rpcerr;
973
974 clnt_geterr(client, &rpcerr);
975 if (rpcerr.re_vers.low > RPCBVERS4)
976 goto error; /* a new version, can't handle */
977 } else if (clnt_st != RPC_PROGUNAVAIL) {
978 /* Cant handle this error */
979 rpc_createerr.cf_stat = clnt_st;
980 clnt_geterr(client, &rpc_createerr.cf_error);
981 goto error;
982 }
983 }
984
985 error:
986 if (client) {
987 CLNT_DESTROY(client);
988 client = NULL;
989 }
990 done:
991 if (nconf->nc_semantics != NC_TPI_CLTS) {
992 /* This client is the connectionless one */
993 if (client) {
994 CLNT_DESTROY(client);
995 client = NULL;
996 }
997 }
998 if (clpp) {
999 *clpp = client;
1000 } else if (client) {
1001 CLNT_DESTROY(client);
1002 }
1003 if (parms.r_addr != NULL && parms.r_addr != nullstring)
1004 free(parms.r_addr);
1005 return (address);
1006 }
1007
1008
1009 /*
1010 * Find the mapped address for program, version.
1011 * Calls the rpcbind service remotely to do the lookup.
1012 * Uses the transport specified in nconf.
1013 * Returns FALSE (0) if no map exists, else returns 1.
1014 *
1015 * Assuming that the address is all properly allocated
1016 */
1017 bool_t
rpcb_getaddr(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,struct netbuf * address,const char * host)1018 rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
1019 struct netbuf *address, const char *host)
1020 {
1021 struct netbuf *na;
1022
1023 if ((na = __rpcb_findaddr_timed(program, version,
1024 (struct netconfig *) nconf, (char *) host,
1025 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1026 return (FALSE);
1027
1028 if (na->len > address->maxlen) {
1029 /* Too long address */
1030 free(na->buf);
1031 free(na);
1032 rpc_createerr.cf_stat = RPC_FAILED;
1033 return (FALSE);
1034 }
1035 memcpy(address->buf, na->buf, (size_t)na->len);
1036 address->len = na->len;
1037 free(na->buf);
1038 free(na);
1039 return (TRUE);
1040 }
1041
1042 /*
1043 * Get a copy of the current maps.
1044 * Calls the rpcbind service remotely to get the maps.
1045 *
1046 * It returns only a list of the services
1047 * It returns NULL on failure.
1048 */
1049 rpcblist *
rpcb_getmaps(const struct netconfig * nconf,const char * host)1050 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1051 {
1052 rpcblist_ptr head = NULL;
1053 CLIENT *client;
1054 enum clnt_stat clnt_st;
1055 rpcvers_t vers = 0;
1056
1057 client = getclnthandle(host, nconf, NULL);
1058 if (client == NULL) {
1059 return (head);
1060 }
1061 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1062 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1063 (char *)(void *)&head, tottimeout);
1064 if (clnt_st == RPC_SUCCESS)
1065 goto done;
1066
1067 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1068 (clnt_st != RPC_PROGUNAVAIL)) {
1069 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1070 clnt_geterr(client, &rpc_createerr.cf_error);
1071 goto done;
1072 }
1073
1074 /* fall back to earlier version */
1075 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1076 if (vers == RPCBVERS4) {
1077 vers = RPCBVERS;
1078 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1079 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1080 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1081 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1082 goto done;
1083 }
1084 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1085 clnt_geterr(client, &rpc_createerr.cf_error);
1086
1087 done:
1088 CLNT_DESTROY(client);
1089 return (head);
1090 }
1091
1092 /*
1093 * rpcbinder remote-call-service interface.
1094 * This routine is used to call the rpcbind remote call service
1095 * which will look up a service program in the address maps, and then
1096 * remotely call that routine with the given parameters. This allows
1097 * programs to do a lookup and call in one step.
1098 *
1099 * nconf -Netconfig structure
1100 * host - Remote host name
1101 * proc - Remote proc identifiers
1102 * xdrargs, xdrres; XDR routines
1103 * argsp, resp - Argument and Result
1104 * tout - Timeout value for this call
1105 * addr_ptr - Preallocated netbuf address
1106 */
1107 enum clnt_stat
rpcb_rmtcall(const struct netconfig * nconf,const char * host,rpcprog_t prog,rpcvers_t vers,rpcproc_t proc,xdrproc_t xdrargs,caddr_t argsp,xdrproc_t xdrres,caddr_t resp,struct timeval tout,const struct netbuf * addr_ptr)1108 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog,
1109 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp,
1110 xdrproc_t xdrres, caddr_t resp, struct timeval tout,
1111 const struct netbuf *addr_ptr)
1112 {
1113 CLIENT *client;
1114 enum clnt_stat stat;
1115 struct r_rpcb_rmtcallargs a;
1116 struct r_rpcb_rmtcallres r;
1117 rpcvers_t rpcb_vers;
1118
1119 stat = 0;
1120 client = getclnthandle(host, nconf, NULL);
1121 if (client == NULL) {
1122 return (RPC_FAILED);
1123 }
1124 /*LINTED const castaway*/
1125 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1126 a.prog = prog;
1127 a.vers = vers;
1128 a.proc = proc;
1129 a.args.args_val = argsp;
1130 a.xdr_args = xdrargs;
1131 r.addr = NULL;
1132 r.results.results_val = resp;
1133 r.xdr_res = xdrres;
1134
1135 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1136 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1137 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1138 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1139 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1140 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1141 struct netbuf *na;
1142 /*LINTED const castaway*/
1143 na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1144 if (!na) {
1145 stat = RPC_N2AXLATEFAILURE;
1146 /*LINTED const castaway*/
1147 ((struct netbuf *) addr_ptr)->len = 0;
1148 goto error;
1149 }
1150 if (na->len > addr_ptr->maxlen) {
1151 /* Too long address */
1152 stat = RPC_FAILED; /* XXX A better error no */
1153 free(na->buf);
1154 free(na);
1155 /*LINTED const castaway*/
1156 ((struct netbuf *) addr_ptr)->len = 0;
1157 goto error;
1158 }
1159 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1160 /*LINTED const castaway*/
1161 ((struct netbuf *)addr_ptr)->len = na->len;
1162 free(na->buf);
1163 free(na);
1164 break;
1165 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1166 (stat != RPC_PROGUNAVAIL)) {
1167 goto error;
1168 }
1169 }
1170 error:
1171 CLNT_DESTROY(client);
1172 if (r.addr)
1173 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1174 return (stat);
1175 }
1176
1177 /*
1178 * Gets the time on the remote host.
1179 * Returns 1 if succeeds else 0.
1180 */
1181 bool_t
rpcb_gettime(const char * host,time_t * timep)1182 rpcb_gettime(const char *host, time_t *timep)
1183 {
1184 CLIENT *client = NULL;
1185 void *handle;
1186 struct netconfig *nconf;
1187 rpcvers_t vers;
1188 enum clnt_stat st;
1189
1190
1191 if ((host == NULL) || (host[0] == 0)) {
1192 time(timep);
1193 return (TRUE);
1194 }
1195
1196 if ((handle = __rpc_setconf("netpath")) == NULL) {
1197 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1198 return (FALSE);
1199 }
1200 rpc_createerr.cf_stat = RPC_SUCCESS;
1201 while (client == NULL) {
1202 if ((nconf = __rpc_getconf(handle)) == NULL) {
1203 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1204 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1205 break;
1206 }
1207 client = getclnthandle(host, nconf, NULL);
1208 if (client)
1209 break;
1210 }
1211 __rpc_endconf(handle);
1212 if (client == (CLIENT *) NULL) {
1213 return (FALSE);
1214 }
1215
1216 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1217 (xdrproc_t) xdr_void, NULL,
1218 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1219
1220 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1221 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1222 if (vers == RPCBVERS4) {
1223 /* fall back to earlier version */
1224 vers = RPCBVERS;
1225 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1226 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1227 (xdrproc_t) xdr_void, NULL,
1228 (xdrproc_t) xdr_int, (char *)(void *)timep,
1229 tottimeout);
1230 }
1231 }
1232 CLNT_DESTROY(client);
1233 return (st == RPC_SUCCESS? TRUE: FALSE);
1234 }
1235
1236 /*
1237 * Converts taddr to universal address. This routine should never
1238 * really be called because local n2a libraries are always provided.
1239 */
1240 char *
rpcb_taddr2uaddr(struct netconfig * nconf,struct netbuf * taddr)1241 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1242 {
1243 CLIENT *client;
1244 char *uaddr = NULL;
1245
1246
1247 /* parameter checking */
1248 if (nconf == NULL) {
1249 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1250 return (NULL);
1251 }
1252 if (taddr == NULL) {
1253 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1254 return (NULL);
1255 }
1256 client = local_rpcb();
1257 if (! client) {
1258 return (NULL);
1259 }
1260
1261 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1262 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1263 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1264 CLNT_DESTROY(client);
1265 return (uaddr);
1266 }
1267
1268 /*
1269 * Converts universal address to netbuf. This routine should never
1270 * really be called because local n2a libraries are always provided.
1271 */
1272 struct netbuf *
rpcb_uaddr2taddr(struct netconfig * nconf,char * uaddr)1273 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1274 {
1275 CLIENT *client;
1276 struct netbuf *taddr;
1277
1278
1279 /* parameter checking */
1280 if (nconf == NULL) {
1281 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1282 return (NULL);
1283 }
1284 if (uaddr == NULL) {
1285 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1286 return (NULL);
1287 }
1288 client = local_rpcb();
1289 if (! client) {
1290 return (NULL);
1291 }
1292
1293 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1294 if (taddr == NULL) {
1295 CLNT_DESTROY(client);
1296 return (NULL);
1297 }
1298 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1299 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1300 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1301 tottimeout) != RPC_SUCCESS) {
1302 free(taddr);
1303 taddr = NULL;
1304 }
1305 CLNT_DESTROY(client);
1306 return (taddr);
1307 }
1308