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