1 /* $NetBSD: rpcb_clnt.c,v 1.31 2015/03/26 11:31:57 justin 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 1.31 2015/03/26 11:31:57 justin 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 extern int __rpc_lowvers;
112
113 static struct address_cache *check_cache(const char *, const char *);
114 static void delete_cache(struct netbuf *);
115 static void add_cache(const char *, const char *, struct netbuf *, char *);
116 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
117 static CLIENT *local_rpcb(void);
118 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
119
120 /*
121 * This routine adjusts the timeout used for calls to the remote rpcbind.
122 * Also, this routine can be used to set the use of portmapper version 2
123 * only when doing rpc_broadcasts
124 * These are private routines that may not be provided in future releases.
125 */
126 bool_t
__rpc_control(int request,void * info)127 __rpc_control(int request, void *info)
128 {
129
130 _DIAGASSERT(info != NULL);
131
132 switch (request) {
133 case CLCR_GET_RPCB_TIMEOUT:
134 *(struct timeval *)info = tottimeout;
135 break;
136 case CLCR_SET_RPCB_TIMEOUT:
137 tottimeout = *(struct timeval *)info;
138 break;
139 case CLCR_SET_LOWVERS:
140 __rpc_lowvers = *(int *)info;
141 break;
142 case CLCR_GET_LOWVERS:
143 *(int *)info = __rpc_lowvers;
144 break;
145 default:
146 return (FALSE);
147 }
148 return (TRUE);
149 }
150
151 /*
152 * It might seem that a reader/writer lock would be more reasonable here.
153 * However because getclnthandle(), the only user of the cache functions,
154 * may do a delete_cache() operation if a check_cache() fails to return an
155 * address useful to clnt_tli_create(), we may as well use a mutex.
156 */
157 /*
158 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
159 * block all clnt_create's if we are trying to connect to a host that's down,
160 * since the lock will be held all during that time.
161 */
162 #ifdef _REENTRANT
163 extern rwlock_t rpcbaddr_cache_lock;
164 #endif
165
166 /*
167 * The routines check_cache(), add_cache(), delete_cache() manage the
168 * cache of rpcbind addresses for (host, netid).
169 */
170
171 static struct address_cache *
check_cache(const char * host,const char * netid)172 check_cache(const char *host, const char *netid)
173 {
174 struct address_cache *cptr;
175
176 _DIAGASSERT(host != NULL);
177 _DIAGASSERT(netid != NULL);
178
179 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
180
181 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
182 if (!strcmp(cptr->ac_host, host) &&
183 !strcmp(cptr->ac_netid, netid)) {
184 #ifdef ND_DEBUG
185 fprintf(stderr, "Found cache entry for %s: %s\n",
186 host, netid);
187 #endif
188 return (cptr);
189 }
190 }
191 return NULL;
192 }
193
194 static void
delete_cache(struct netbuf * addr)195 delete_cache(struct netbuf *addr)
196 {
197 struct address_cache *cptr, *prevptr = NULL;
198
199 _DIAGASSERT(addr != NULL);
200
201 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
202 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
203 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
204 free(cptr->ac_host);
205 free(cptr->ac_netid);
206 free(cptr->ac_taddr->buf);
207 free(cptr->ac_taddr);
208 if (cptr->ac_uaddr)
209 free(cptr->ac_uaddr);
210 if (prevptr)
211 prevptr->ac_next = cptr->ac_next;
212 else
213 front = cptr->ac_next;
214 free(cptr);
215 cachesize--;
216 break;
217 }
218 prevptr = cptr;
219 }
220 }
221
222 static void
add_cache(const char * host,const char * netid,struct netbuf * taddr,char * uaddr)223 add_cache(const char *host, const char *netid, struct netbuf *taddr,
224 char *uaddr)
225 {
226 struct address_cache *ad_cache, *cptr, *prevptr;
227
228 _DIAGASSERT(host != NULL);
229 _DIAGASSERT(netid != NULL);
230 /* uaddr may be NULL */
231 /* taddr may be NULL ??? */
232
233 ad_cache = malloc(sizeof(*ad_cache));
234 if (!ad_cache) {
235 return;
236 }
237 ad_cache->ac_host = strdup(host);
238 ad_cache->ac_netid = strdup(netid);
239 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
240 ad_cache->ac_taddr = malloc(sizeof(*ad_cache->ac_taddr));
241 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
242 (uaddr && !ad_cache->ac_uaddr)) {
243 goto out;
244 }
245 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
246 ad_cache->ac_taddr->buf = malloc(taddr->len);
247 if (ad_cache->ac_taddr->buf == NULL) {
248 out:
249 if (ad_cache->ac_host)
250 free(ad_cache->ac_host);
251 if (ad_cache->ac_netid)
252 free(ad_cache->ac_netid);
253 if (ad_cache->ac_uaddr)
254 free(ad_cache->ac_uaddr);
255 if (ad_cache->ac_taddr)
256 free(ad_cache->ac_taddr);
257 free(ad_cache);
258 return;
259 }
260 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
261 #ifdef ND_DEBUG
262 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
263 #endif
264
265 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
266
267 rwlock_wrlock(&rpcbaddr_cache_lock);
268 if (cachesize < CACHESIZE) {
269 ad_cache->ac_next = front;
270 front = ad_cache;
271 cachesize++;
272 } else {
273 /* Free the last entry */
274 cptr = front;
275 prevptr = NULL;
276 while (cptr->ac_next) {
277 prevptr = cptr;
278 cptr = cptr->ac_next;
279 }
280
281 #ifdef ND_DEBUG
282 fprintf(stderr, "Deleted from cache: %s : %s\n",
283 cptr->ac_host, cptr->ac_netid);
284 #endif
285 free(cptr->ac_host);
286 free(cptr->ac_netid);
287 free(cptr->ac_taddr->buf);
288 free(cptr->ac_taddr);
289 if (cptr->ac_uaddr)
290 free(cptr->ac_uaddr);
291
292 if (prevptr) {
293 prevptr->ac_next = NULL;
294 ad_cache->ac_next = front;
295 front = ad_cache;
296 } else {
297 front = ad_cache;
298 ad_cache->ac_next = NULL;
299 }
300 free(cptr);
301 }
302 rwlock_unlock(&rpcbaddr_cache_lock);
303 }
304
305 /*
306 * This routine will return a client handle that is connected to the
307 * rpcbind. Returns NULL on error and free's everything.
308 */
309 static CLIENT *
getclnthandle(const char * host,const struct netconfig * nconf,char ** targaddr)310 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
311 {
312 CLIENT *client;
313 struct netbuf *addr, taddr;
314 struct netbuf addr_to_delete;
315 struct __rpc_sockinfo si;
316 struct addrinfo hints, *res, *tres;
317 struct address_cache *ad_cache;
318 char *tmpaddr;
319
320 _DIAGASSERT(host != NULL);
321 _DIAGASSERT(nconf != NULL);
322 /* targaddr may be NULL */
323
324 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
325
326 /* Get the address of the rpcbind. Check cache first */
327 client = NULL;
328 addr_to_delete.len = 0;
329 addr_to_delete.buf = NULL;
330 rwlock_rdlock(&rpcbaddr_cache_lock);
331 ad_cache = check_cache(host, nconf->nc_netid);
332 if (ad_cache != NULL) {
333 addr = ad_cache->ac_taddr;
334 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
335 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
336 if (client != NULL) {
337 if (targaddr)
338 *targaddr = ad_cache->ac_uaddr;
339 rwlock_unlock(&rpcbaddr_cache_lock);
340 return (client);
341 }
342 addr_to_delete.len = addr->len;
343 addr_to_delete.buf = malloc(addr->len);
344 if (addr_to_delete.buf == NULL) {
345 addr_to_delete.len = 0;
346 } else {
347 memcpy(addr_to_delete.buf, addr->buf, addr->len);
348 }
349 }
350 rwlock_unlock(&rpcbaddr_cache_lock);
351 if (addr_to_delete.len != 0) {
352 /*
353 * Assume this may be due to cache data being
354 * outdated
355 */
356 rwlock_wrlock(&rpcbaddr_cache_lock);
357 delete_cache(&addr_to_delete);
358 rwlock_unlock(&rpcbaddr_cache_lock);
359 free(addr_to_delete.buf);
360 }
361 if (!__rpc_nconf2sockinfo(nconf, &si)) {
362 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
363 return NULL;
364 }
365
366 memset(&hints, 0, sizeof hints);
367 hints.ai_family = si.si_af;
368 hints.ai_socktype = si.si_socktype;
369 hints.ai_protocol = si.si_proto;
370
371 #ifdef CLNT_DEBUG
372 printf("trying netid %s family %d proto %d socktype %d\n",
373 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
374 #endif
375
376 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
377 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
378 return NULL;
379 }
380
381 for (tres = res; tres != NULL; tres = tres->ai_next) {
382 taddr.buf = tres->ai_addr;
383 taddr.len = taddr.maxlen = tres->ai_addrlen;
384
385 #ifdef ND_DEBUG
386 {
387 char *ua;
388
389 ua = taddr2uaddr(nconf, &taddr);
390 fprintf(stderr, "Got it [%s]\n", ua);
391 free(ua);
392 }
393 #endif
394
395 #ifdef ND_DEBUG
396 {
397 int i;
398
399 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
400 taddr.len, taddr.maxlen);
401 fprintf(stderr, "\tAddress is ");
402 for (i = 0; i < taddr.len; i++)
403 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
404 fprintf(stderr, "\n");
405 }
406 #endif
407 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
408 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
409 #ifdef ND_DEBUG
410 if (! client) {
411 clnt_pcreateerror("rpcbind clnt interface");
412 }
413 #endif
414
415 if (client) {
416 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
417 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
418 if (targaddr)
419 *targaddr = tmpaddr;
420 break;
421 }
422 }
423 freeaddrinfo(res);
424 return (client);
425 }
426
427 /* XXX */
428 #define IN4_LOCALHOST_STRING "127.0.0.1"
429 #define IN6_LOCALHOST_STRING "::1"
430
431 /*
432 * This routine will return a client handle that is connected to the local
433 * rpcbind. Returns NULL on error and free's everything.
434 */
435 static CLIENT *
local_rpcb(void)436 local_rpcb(void)
437 {
438 CLIENT *client;
439 static struct netconfig *loopnconf;
440 static const char *hostname;
441 #ifdef _REENTRANT
442 extern mutex_t loopnconf_lock;
443 #endif
444 int sock;
445 size_t tsize;
446 struct netbuf nbuf;
447 struct sockaddr_un sun;
448
449 /*
450 * Try connecting to the local rpcbind through a local socket
451 * first. If this doesn't work, try all transports defined in
452 * the netconfig file.
453 */
454 memset(&sun, 0, sizeof sun);
455 sock = socket(AF_LOCAL, SOCK_STREAM, 0);
456 if (sock < 0)
457 goto try_nconf;
458 sun.sun_family = AF_LOCAL;
459 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
460 tsize = SUN_LEN(&sun);
461 _DIAGASSERT(__type_fit(uint8_t, tsize));
462 nbuf.len = sun.sun_len = (uint8_t)tsize;
463 nbuf.maxlen = sizeof (struct sockaddr_un);
464 nbuf.buf = &sun;
465
466 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
467 _DIAGASSERT(__type_fit(u_int, tsize));
468 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
469 (rpcvers_t)RPCBVERS, (u_int)tsize, (u_int)tsize);
470
471 if (client != NULL) {
472 /* XXX - mark the socket to be closed in destructor */
473 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
474 return client;
475 }
476
477 /* XXX - nobody needs this socket anymore, free the descriptor */
478 close(sock);
479
480 try_nconf:
481
482 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
483 mutex_lock(&loopnconf_lock);
484 if (loopnconf == NULL) {
485 struct netconfig *nconf, *tmpnconf = NULL;
486 void *nc_handle;
487 int fd;
488
489 nc_handle = setnetconfig();
490 if (nc_handle == NULL) {
491 /* fails to open netconfig file */
492 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
493 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
494 mutex_unlock(&loopnconf_lock);
495 return (NULL);
496 }
497 while ((nconf = getnetconfig(nc_handle)) != NULL) {
498 #ifdef INET6
499 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
500 #else
501 if ((
502 #endif
503 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
504 (nconf->nc_semantics == NC_TPI_COTS ||
505 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
506 fd = __rpc_nconf2fd(nconf);
507 /*
508 * Can't create a socket, assume that
509 * this family isn't configured in the kernel.
510 */
511 if (fd < 0)
512 continue;
513 close(fd);
514 tmpnconf = nconf;
515 if (!strcmp(nconf->nc_protofmly, NC_INET))
516 hostname = IN4_LOCALHOST_STRING;
517 else
518 hostname = IN6_LOCALHOST_STRING;
519 }
520 }
521 if (tmpnconf == NULL) {
522 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
523 mutex_unlock(&loopnconf_lock);
524 return (NULL);
525 }
526 loopnconf = getnetconfigent(tmpnconf->nc_netid);
527 /* loopnconf is never freed */
528 endnetconfig(nc_handle);
529 }
530 mutex_unlock(&loopnconf_lock);
531 client = getclnthandle(hostname, loopnconf, NULL);
532 return (client);
533 }
534
535 /*
536 * Set a mapping between program, version and address.
537 * Calls the rpcbind service to do the mapping.
538 */
539 bool_t
rpcb_set(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const struct netbuf * address)540 rpcb_set(rpcprog_t program, rpcvers_t version,
541 const struct netconfig *nconf, /* Network structure of transport */
542 const struct netbuf *address) /* Services netconfig address */
543 {
544 CLIENT *client;
545 bool_t rslt = FALSE;
546 RPCB parms;
547 char uidbuf[32];
548
549 /* parameter checking */
550 if (nconf == NULL) {
551 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
552 return (FALSE);
553 }
554 if (address == NULL) {
555 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
556 return (FALSE);
557 }
558 client = local_rpcb();
559 if (! client) {
560 return (FALSE);
561 }
562
563 /* convert to universal */
564 parms.r_addr = taddr2uaddr(__UNCONST(nconf), __UNCONST(address));
565 if (!parms.r_addr) {
566 CLNT_DESTROY(client);
567 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
568 return (FALSE); /* no universal address */
569 }
570 parms.r_prog = program;
571 parms.r_vers = version;
572 parms.r_netid = nconf->nc_netid;
573 /*
574 * Though uid is not being used directly, we still send it for
575 * completeness. For non-unix platforms, perhaps some other
576 * string or an empty string can be sent.
577 */
578 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
579 parms.r_owner = uidbuf;
580
581 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
582 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
583 (char *)(void *)&rslt, tottimeout) != RPC_SUCCESS) {
584 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
585 clnt_geterr(client, &rpc_createerr.cf_error);
586 }
587
588 CLNT_DESTROY(client);
589 free(parms.r_addr);
590 return (rslt);
591 }
592
593 /*
594 * Remove the mapping between program, version and netbuf address.
595 * Calls the rpcbind service to do the un-mapping.
596 * If netbuf is NULL, unset for all the transports, otherwise unset
597 * only for the given transport.
598 */
599 bool_t
rpcb_unset(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf)600 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
601 {
602 CLIENT *client;
603 bool_t rslt = FALSE;
604 RPCB parms;
605 char uidbuf[32];
606
607 client = local_rpcb();
608 if (! client) {
609 return (FALSE);
610 }
611
612 parms.r_prog = program;
613 parms.r_vers = version;
614 if (nconf)
615 parms.r_netid = nconf->nc_netid;
616 else {
617 parms.r_netid = __UNCONST(&nullstring[0]); /* unsets all */
618 }
619 parms.r_addr = __UNCONST(&nullstring[0]);
620 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
621 parms.r_owner = uidbuf;
622
623 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
624 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
625 (char *)(void *)&rslt, tottimeout) != RPC_SUCCESS) {
626 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
627 clnt_geterr(client, &rpc_createerr.cf_error);
628 }
629
630 CLNT_DESTROY(client);
631 return (rslt);
632 }
633
634 /*
635 * From the merged list, find the appropriate entry
636 */
637 static struct netbuf *
got_entry(rpcb_entry_list_ptr relp,const struct netconfig * nconf)638 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
639 {
640 struct netbuf *na = NULL;
641 rpcb_entry_list_ptr sp;
642 rpcb_entry *rmap;
643
644 _DIAGASSERT(nconf != NULL);
645
646 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
647 rmap = &sp->rpcb_entry_map;
648 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
649 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
650 (nconf->nc_semantics == rmap->r_nc_semantics) &&
651 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
652 na = uaddr2taddr(nconf, rmap->r_maddr);
653 #ifdef ND_DEBUG
654 fprintf(stderr, "\tRemote address is [%s].\n",
655 rmap->r_maddr);
656 if (!na)
657 fprintf(stderr,
658 "\tCouldn't resolve remote address!\n");
659 #endif
660 break;
661 }
662 }
663 return (na);
664 }
665
666 /*
667 * An internal function which optimizes rpcb_getaddr function. It also
668 * returns the client handle that it uses to contact the remote rpcbind.
669 *
670 * The algorithm used: If the transports is TCP or UDP, it first tries
671 * version 2 (portmap), 4 and then 3 (svr4). This order should be
672 * changed in the next OS release to 4, 2 and 3. We are assuming that by
673 * that time, version 4 would be available on many machines on the network.
674 * With this algorithm, we get performance as well as a plan for
675 * obsoleting version 2.
676 *
677 * For all other transports, the algorithm remains as 4 and then 3.
678 *
679 * XXX: Due to some problems with t_connect(), we do not reuse the same client
680 * handle for COTS cases and hence in these cases we do not return the
681 * client handle. This code will change if t_connect() ever
682 * starts working properly. Also look under clnt_vc.c.
683 */
684 struct netbuf *
__rpcb_findaddr(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const char * host,CLIENT ** clpp)685 __rpcb_findaddr(rpcprog_t program, rpcvers_t version,
686 const struct netconfig *nconf, const char *host, CLIENT **clpp)
687 {
688 CLIENT *client = NULL;
689 RPCB parms;
690 enum clnt_stat clnt_st;
691 char *ua = NULL;
692 rpcvers_t vers;
693 struct netbuf *address = NULL;
694 rpcvers_t start_vers = RPCBVERS4;
695 struct netbuf servaddr;
696
697 /* nconf is handled below */
698 _DIAGASSERT(host != NULL);
699 /* clpp may be NULL */
700
701 /* parameter checking */
702 if (nconf == NULL) {
703 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
704 return (NULL);
705 }
706
707 parms.r_addr = NULL;
708
709 #ifdef PORTMAP
710 /* Try version 2 for TCP or UDP */
711 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
712 u_short port = 0;
713 struct netbuf remote;
714 rpcvers_t pmapvers = 2;
715 struct pmap pmapparms;
716
717 /*
718 * Try UDP only - there are some portmappers out
719 * there that use UDP only.
720 */
721 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
722 struct netconfig *newnconf;
723
724 if ((newnconf = getnetconfigent("udp")) == NULL) {
725 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
726 return (NULL);
727 }
728 client = getclnthandle(host, newnconf, &parms.r_addr);
729 freenetconfigent(newnconf);
730 } else {
731 client = getclnthandle(host, nconf, &parms.r_addr);
732 }
733 if (client == NULL) {
734 return (NULL);
735 }
736
737 /* Set the version */
738 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&pmapvers);
739 pmapparms.pm_prog = program;
740 pmapparms.pm_vers = version;
741 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
742 IPPROTO_UDP : IPPROTO_TCP;
743 pmapparms.pm_port = 0; /* not needed */
744 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
745 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
746 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
747 tottimeout);
748 if (clnt_st != RPC_SUCCESS) {
749 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
750 (clnt_st == RPC_PROGUNAVAIL))
751 goto try_rpcbind; /* Try different versions */
752 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
753 clnt_geterr(client, &rpc_createerr.cf_error);
754 goto error;
755 } else if (port == 0) {
756 address = NULL;
757 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
758 goto error;
759 }
760 port = htons(port);
761 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)(void *)&remote);
762 if (((address = malloc(sizeof(struct netbuf))) == NULL) ||
763 ((address->buf = malloc(remote.len)) == NULL)) {
764 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
765 clnt_geterr(client, &rpc_createerr.cf_error);
766 if (address) {
767 free(address);
768 address = NULL;
769 }
770 goto error;
771 }
772 memcpy(address->buf, remote.buf, remote.len);
773 memcpy(&((char *)address->buf)[sizeof (short)],
774 (char *)(void *)&port, sizeof (short));
775 address->len = address->maxlen = remote.len;
776 goto done;
777 }
778 #endif
779
780 try_rpcbind:
781 /*
782 * Now we try version 4 and then 3.
783 * We also send the remote system the address we used to
784 * contact it in case it can help to connect back with us
785 */
786 parms.r_prog = program;
787 parms.r_vers = version;
788 parms.r_owner = __UNCONST(&nullstring[0]); /* not needed; */
789 /* just for xdring */
790 parms.r_netid = nconf->nc_netid; /* not really needed */
791
792 /*
793 * If a COTS transport is being used, try getting address via CLTS
794 * transport. This works only with version 4.
795 * NOTE: This is being done for all transports EXCEPT LOOPBACK
796 * because with loopback the cost to go to a COTS is same as
797 * the cost to go through CLTS, plus you get the advantage of
798 * finding out immediately if the local rpcbind process is dead.
799 */
800 #if 1
801 if ((nconf->nc_semantics == NC_TPI_COTS_ORD ||
802 nconf->nc_semantics == NC_TPI_COTS) &&
803 (strcmp(nconf->nc_protofmly, NC_LOOPBACK) != 0))
804 #else
805 if (client != NULL) {
806 CLNT_DESTROY(client);
807 client = NULL;
808 }
809 if (nconf->nc_semantics == NC_TPI_CLTS)
810 #endif
811 {
812 void *handle;
813 struct netconfig *nconf_clts;
814 rpcb_entry_list_ptr relp = NULL;
815
816 if (client == NULL) {
817 /* This did not go through the above PORTMAP/TCP code */
818 #if 1
819 if ((handle = __rpc_setconf("datagram_v")) != NULL)
820 #else
821 if ((handle = __rpc_setconf("circuit_v")) != NULL)
822 #endif
823 {
824 while ((nconf_clts = __rpc_getconf(handle))
825 != NULL) {
826 if (strcmp(nconf_clts->nc_protofmly,
827 nconf->nc_protofmly) != 0) {
828 continue;
829 }
830 client = getclnthandle(host, nconf_clts,
831 &parms.r_addr);
832 break;
833 }
834 __rpc_endconf(handle);
835 }
836 if (client == NULL)
837 goto regular_rpcbind; /* Go the regular way */
838 } else {
839 /* This is a UDP PORTMAP handle. Change to version 4 */
840 vers = RPCBVERS4;
841 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
842 }
843 /*
844 * We also send the remote system the address we used to
845 * contact it in case it can help it connect back with us
846 */
847 if (parms.r_addr == NULL) {
848 /* for XDRing */
849 parms.r_addr = __UNCONST(&nullstring[0]);
850 }
851 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
852 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
853 (xdrproc_t) xdr_rpcb_entry_list_ptr,
854 (char *)(void *)&relp, tottimeout);
855 if (clnt_st == RPC_SUCCESS) {
856 if ((address = got_entry(relp, nconf)) != NULL) {
857 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
858 (char *)(void *)&relp);
859 CLNT_CONTROL(client, CLGET_SVC_ADDR,
860 (char *)(void *)&servaddr);
861 __rpc_fixup_addr(address, &servaddr);
862 goto done;
863 }
864 /* Entry not found for this transport */
865 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
866 (char *)(void *)&relp);
867 /*
868 * XXX: should have perhaps returned with error but
869 * since the remote machine might not always be able
870 * to send the address on all transports, we try the
871 * regular way with regular_rpcbind
872 */
873 goto regular_rpcbind;
874 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
875 (clnt_st == RPC_PROGUNAVAIL)) {
876 start_vers = RPCBVERS; /* Try version 3 now */
877 goto regular_rpcbind; /* Try different versions */
878 } else {
879 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
880 clnt_geterr(client, &rpc_createerr.cf_error);
881 goto error;
882 }
883 }
884
885 regular_rpcbind:
886
887 /* Now the same transport is to be used to get the address */
888 #if 1
889 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
890 (nconf->nc_semantics == NC_TPI_COTS)))
891 #else
892 if (client && nconf->nc_semantics == NC_TPI_CLTS)
893 #endif
894 {
895 /* A CLTS type of client - destroy it */
896 CLNT_DESTROY(client);
897 client = NULL;
898 }
899
900 if (client == NULL) {
901 client = getclnthandle(host, nconf, &parms.r_addr);
902 if (client == NULL) {
903 goto error;
904 }
905 }
906 if (parms.r_addr == NULL)
907 parms.r_addr = __UNCONST(&nullstring[0]);
908
909 /* First try from start_vers and then version 3 (RPCBVERS) */
910 for (vers = start_vers; vers >= RPCBVERS; vers--) {
911 /* Set the version */
912 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
913 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
914 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
915 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua,
916 tottimeout);
917 if (clnt_st == RPC_SUCCESS) {
918 if ((ua == NULL) || (ua[0] == 0)) {
919 /* address unknown */
920 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
921 goto error;
922 }
923 address = uaddr2taddr(nconf, ua);
924 #ifdef ND_DEBUG
925 fprintf(stderr, "\tRemote address is [%s]\n", ua);
926 if (!address)
927 fprintf(stderr,
928 "\tCouldn't resolve remote address!\n");
929 #endif
930 xdr_free((xdrproc_t)xdr_wrapstring,
931 (char *)(void *)&ua);
932
933 if (! address) {
934 /* We don't know about your universal address */
935 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
936 goto error;
937 }
938 CLNT_CONTROL(client, CLGET_SVC_ADDR,
939 (char *)(void *)&servaddr);
940 __rpc_fixup_addr(address, &servaddr);
941 goto done;
942 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
943 struct rpc_err rpcerr;
944
945 clnt_geterr(client, &rpcerr);
946 if (rpcerr.re_vers.low > RPCBVERS4)
947 goto error; /* a new version, can't handle */
948 } else if (clnt_st != RPC_PROGUNAVAIL) {
949 /* Cant handle this error */
950 rpc_createerr.cf_stat = clnt_st;
951 clnt_geterr(client, &rpc_createerr.cf_error);
952 goto error;
953 }
954 }
955
956 error:
957 if (client) {
958 CLNT_DESTROY(client);
959 client = NULL;
960 }
961 done:
962 if (nconf->nc_semantics != NC_TPI_CLTS) {
963 /* This client is the connectionless one */
964 if (client) {
965 CLNT_DESTROY(client);
966 client = NULL;
967 }
968 }
969 if (clpp) {
970 *clpp = client;
971 } else if (client) {
972 CLNT_DESTROY(client);
973 }
974 return (address);
975 }
976
977
978 /*
979 * Find the mapped address for program, version.
980 * Calls the rpcbind service remotely to do the lookup.
981 * Uses the transport specified in nconf.
982 * Returns FALSE (0) if no map exists, else returns 1.
983 *
984 * Assuming that the address is all properly allocated
985 */
986 bool_t
rpcb_getaddr(const rpcprog_t program,const rpcvers_t version,const struct netconfig * nconf,struct netbuf * address,const char * host)987 rpcb_getaddr(const rpcprog_t program, const rpcvers_t version,
988 const struct netconfig *nconf, struct netbuf *address,
989 const char *host)
990 {
991 struct netbuf *na;
992
993 _DIAGASSERT(address != NULL);
994
995 if ((na = __rpcb_findaddr(program, version, nconf,
996 host, NULL)) == NULL)
997 return (FALSE);
998
999 if (na->len > address->maxlen) {
1000 /* Too long address */
1001 free(na->buf);
1002 free(na);
1003 rpc_createerr.cf_stat = RPC_FAILED;
1004 return (FALSE);
1005 }
1006 memcpy(address->buf, na->buf, (size_t)na->len);
1007 address->len = na->len;
1008 free(na->buf);
1009 free(na);
1010 return (TRUE);
1011 }
1012
1013 /*
1014 * Get a copy of the current maps.
1015 * Calls the rpcbind service remotely to get the maps.
1016 *
1017 * It returns only a list of the services
1018 * It returns NULL on failure.
1019 */
1020 rpcblist *
rpcb_getmaps(const struct netconfig * nconf,const char * host)1021 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1022 {
1023 rpcblist_ptr head = NULL;
1024 CLIENT *client;
1025 enum clnt_stat clnt_st;
1026 rpcvers_t vers = 0;
1027
1028 client = getclnthandle(host, nconf, NULL);
1029 if (client == NULL) {
1030 return (head);
1031 }
1032 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1033 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1034 (char *)(void *)&head, tottimeout);
1035 if (clnt_st == RPC_SUCCESS)
1036 goto done;
1037
1038 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1039 (clnt_st != RPC_PROGUNAVAIL)) {
1040 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1041 clnt_geterr(client, &rpc_createerr.cf_error);
1042 goto done;
1043 }
1044
1045 /* fall back to earlier version */
1046 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1047 if (vers == RPCBVERS4) {
1048 vers = RPCBVERS;
1049 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1050 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1051 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1052 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1053 goto done;
1054 }
1055 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1056 clnt_geterr(client, &rpc_createerr.cf_error);
1057
1058 done:
1059 CLNT_DESTROY(client);
1060 return (head);
1061 }
1062
1063 /*
1064 * rpcbinder remote-call-service interface.
1065 * This routine is used to call the rpcbind remote call service
1066 * which will look up a service program in the address maps, and then
1067 * remotely call that routine with the given parameters. This allows
1068 * programs to do a lookup and call in one step.
1069 */
1070 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)1071 rpcb_rmtcall(
1072 const struct netconfig *nconf, /* Netconfig structure */
1073 const char *host, /* Remote host name */
1074 rpcprog_t prog,
1075 rpcvers_t vers,
1076 rpcproc_t proc, /* Remote proc identifiers */
1077 xdrproc_t xdrargs,
1078 const char *argsp, /* Argument */
1079 xdrproc_t xdrres, /* XDR routines */
1080 caddr_t resp, /* Result */
1081 struct timeval tout, /* Timeout value for this call */
1082 const struct netbuf *addr_ptr) /* Preallocated netbuf address */
1083 {
1084 CLIENT *client;
1085 enum clnt_stat stat;
1086 struct r_rpcb_rmtcallargs a;
1087 struct r_rpcb_rmtcallres r;
1088 rpcvers_t rpcb_vers;
1089
1090 stat = RPC_FAILED; /* XXXGCC -Wuninitialized [dreamcast] */
1091
1092 client = getclnthandle(host, nconf, NULL);
1093 if (client == NULL) {
1094 return (RPC_FAILED);
1095 }
1096 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, __UNCONST(&rmttimeout));
1097 a.prog = prog;
1098 a.vers = vers;
1099 a.proc = proc;
1100 a.args.args_val = argsp;
1101 a.xdr_args = xdrargs;
1102 r.addr = NULL;
1103 r.results.results_val = resp;
1104 r.xdr_res = xdrres;
1105
1106 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1107 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1108 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1109 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1110 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1111 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1112 struct netbuf *na;
1113 na = uaddr2taddr(__UNCONST(nconf), r.addr);
1114 if (!na) {
1115 stat = RPC_N2AXLATEFAILURE;
1116 ((struct netbuf *)__UNCONST(addr_ptr))->len = 0;
1117 goto error;
1118 }
1119 if (na->len > addr_ptr->maxlen) {
1120 /* Too long address */
1121 stat = RPC_FAILED; /* XXX A better error no */
1122 free(na->buf);
1123 free(na);
1124 ((struct netbuf *)__UNCONST(addr_ptr))->len = 0;
1125 goto error;
1126 }
1127 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1128 ((struct netbuf *)__UNCONST(addr_ptr))->len = na->len;
1129 free(na->buf);
1130 free(na);
1131 break;
1132 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1133 (stat != RPC_PROGUNAVAIL)) {
1134 goto error;
1135 }
1136 }
1137 error:
1138 CLNT_DESTROY(client);
1139 if (r.addr)
1140 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1141 return (stat);
1142 }
1143
1144 /*
1145 * Gets the time on the remote host.
1146 * Returns 1 if succeeds else 0.
1147 */
1148 bool_t
rpcb_gettime(const char * host,time_t * timep)1149 rpcb_gettime(const char *host, time_t *timep)
1150 {
1151 CLIENT *client = NULL;
1152 void *handle;
1153 struct netconfig *nconf;
1154 rpcvers_t vers;
1155 enum clnt_stat st;
1156
1157
1158 if ((host == NULL) || (host[0] == 0)) {
1159 time(timep);
1160 return (TRUE);
1161 }
1162
1163 if ((handle = __rpc_setconf("netpath")) == NULL) {
1164 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1165 return (FALSE);
1166 }
1167 rpc_createerr.cf_stat = RPC_SUCCESS;
1168 while (client == NULL) {
1169 if ((nconf = __rpc_getconf(handle)) == NULL) {
1170 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1171 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1172 break;
1173 }
1174 client = getclnthandle(host, nconf, NULL);
1175 if (client)
1176 break;
1177 }
1178 __rpc_endconf(handle);
1179 if (client == NULL) {
1180 return (FALSE);
1181 }
1182
1183 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1184 (xdrproc_t) xdr_void, NULL,
1185 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1186
1187 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1188 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1189 if (vers == RPCBVERS4) {
1190 /* fall back to earlier version */
1191 vers = RPCBVERS;
1192 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1193 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1194 (xdrproc_t) xdr_void, NULL,
1195 (xdrproc_t) xdr_int, (char *)(void *)timep,
1196 tottimeout);
1197 }
1198 }
1199 CLNT_DESTROY(client);
1200 return (st == RPC_SUCCESS? TRUE: FALSE);
1201 }
1202
1203 /*
1204 * Converts taddr to universal address. This routine should never
1205 * really be called because local n2a libraries are always provided.
1206 */
1207 char *
rpcb_taddr2uaddr(struct netconfig * nconf,struct netbuf * taddr)1208 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1209 {
1210 CLIENT *client;
1211 char *uaddr = NULL;
1212
1213 /* parameter checking */
1214 if (nconf == NULL) {
1215 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1216 return (NULL);
1217 }
1218 if (taddr == NULL) {
1219 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1220 return (NULL);
1221 }
1222 client = local_rpcb();
1223 if (! client) {
1224 return (NULL);
1225 }
1226
1227 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1228 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1229 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout)
1230 != RPC_SUCCESS) {
1231 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
1232 clnt_geterr(client, &rpc_createerr.cf_error);
1233 }
1234 CLNT_DESTROY(client);
1235 return (uaddr);
1236 }
1237
1238 /*
1239 * Converts universal address to netbuf. This routine should never
1240 * really be called because local n2a libraries are always provided.
1241 */
1242 struct netbuf *
rpcb_uaddr2taddr(struct netconfig * nconf,char * uaddr)1243 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1244 {
1245 CLIENT *client;
1246 struct netbuf *taddr;
1247
1248
1249 /* parameter checking */
1250 if (nconf == NULL) {
1251 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1252 return (NULL);
1253 }
1254 if (uaddr == NULL) {
1255 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1256 return (NULL);
1257 }
1258 client = local_rpcb();
1259 if (! client) {
1260 return (NULL);
1261 }
1262
1263 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1264 if (taddr == NULL) {
1265 CLNT_DESTROY(client);
1266 return (NULL);
1267 }
1268 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1269 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1270 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1271 tottimeout) != RPC_SUCCESS) {
1272 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
1273 clnt_geterr(client, &rpc_createerr.cf_error);
1274 free(taddr);
1275 taddr = NULL;
1276 }
1277 CLNT_DESTROY(client);
1278 return (taddr);
1279 }
1280