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 /* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */
34
35
36 #if defined(LIBC_SCCS) && !defined(lint)
37 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
38 #endif
39 /*
40 * rpcb_clnt.c
41 * interface to rpcbind rpc service.
42 */
43
44 #include "namespace.h"
45 #include "reentrant.h"
46 #include <sys/types.h>
47 #include <sys/socket.h>
48 #include <sys/un.h>
49 #include <sys/utsname.h>
50 #include <rpc/rpc.h>
51 #include <rpc/rpcb_prot.h>
52 #include <rpc/nettype.h>
53 #include <netconfig.h>
54 #ifdef PORTMAP
55 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
56 #include <rpc/pmap_prot.h>
57 #endif /* PORTMAP */
58 #include <stdio.h>
59 #include <errno.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <unistd.h>
63 #include <netdb.h>
64 #include <syslog.h>
65 #include "un-namespace.h"
66
67 #include "rpc_com.h"
68 #include "mt_misc.h"
69
70 static struct timeval tottimeout = { 60, 0 };
71 static const struct timeval rmttimeout = { 3, 0 };
72 static struct timeval rpcbrmttime = { 15, 0 };
73
74 extern bool_t xdr_wrapstring(XDR *, char **);
75
76 static const char nullstring[] = "\000";
77
78 #define CACHESIZE 6
79
80 struct address_cache {
81 char *ac_host;
82 char *ac_netid;
83 char *ac_uaddr;
84 struct netbuf *ac_taddr;
85 struct address_cache *ac_next;
86 };
87
88 static struct address_cache *front;
89 static int cachesize;
90
91 #define CLCR_GET_RPCB_TIMEOUT 1
92 #define CLCR_SET_RPCB_TIMEOUT 2
93
94
95 extern int __rpc_lowvers;
96
97 static struct address_cache *check_cache(const char *, const char *);
98 static void delete_cache(struct netbuf *);
99 static void add_cache(const char *, const char *, struct netbuf *, char *);
100 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
101 static CLIENT *local_rpcb(void);
102 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
103
104 /*
105 * This routine adjusts the timeout used for calls to the remote rpcbind.
106 * Also, this routine can be used to set the use of portmapper version 2
107 * only when doing rpc_broadcasts
108 * These are private routines that may not be provided in future releases.
109 */
110 bool_t
__rpc_control(int request,void * info)111 __rpc_control(int request, void *info)
112 {
113 switch (request) {
114 case CLCR_GET_RPCB_TIMEOUT:
115 *(struct timeval *)info = tottimeout;
116 break;
117 case CLCR_SET_RPCB_TIMEOUT:
118 tottimeout = *(struct timeval *)info;
119 break;
120 case CLCR_SET_LOWVERS:
121 __rpc_lowvers = *(int *)info;
122 break;
123 case CLCR_GET_LOWVERS:
124 *(int *)info = __rpc_lowvers;
125 break;
126 default:
127 return (FALSE);
128 }
129 return (TRUE);
130 }
131
132 /*
133 * It might seem that a reader/writer lock would be more reasonable here.
134 * However because getclnthandle(), the only user of the cache functions,
135 * may do a delete_cache() operation if a check_cache() fails to return an
136 * address useful to clnt_tli_create(), we may as well use a mutex.
137 */
138 /*
139 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
140 * block all clnt_create's if we are trying to connect to a host that's down,
141 * since the lock will be held all during that time.
142 */
143
144 /*
145 * The routines check_cache(), add_cache(), delete_cache() manage the
146 * cache of rpcbind addresses for (host, netid).
147 */
148
149 static struct address_cache *
check_cache(const char * host,const char * netid)150 check_cache(const char *host, const char *netid)
151 {
152 struct address_cache *cptr;
153
154 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
155
156 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
157 if (!strcmp(cptr->ac_host, host) &&
158 !strcmp(cptr->ac_netid, netid)) {
159 #ifdef ND_DEBUG
160 fprintf(stderr, "Found cache entry for %s: %s\n",
161 host, netid);
162 #endif
163 return (cptr);
164 }
165 }
166 return ((struct address_cache *) NULL);
167 }
168
169 static void
delete_cache(struct netbuf * addr)170 delete_cache(struct netbuf *addr)
171 {
172 struct address_cache *cptr, *prevptr = NULL;
173
174 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
175 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
176 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
177 free(cptr->ac_host);
178 free(cptr->ac_netid);
179 free(cptr->ac_taddr->buf);
180 free(cptr->ac_taddr);
181 free(cptr->ac_uaddr);
182 if (prevptr)
183 prevptr->ac_next = cptr->ac_next;
184 else
185 front = cptr->ac_next;
186 free(cptr);
187 cachesize--;
188 break;
189 }
190 prevptr = cptr;
191 }
192 }
193
194 static void
add_cache(const char * host,const char * netid,struct netbuf * taddr,char * uaddr)195 add_cache(const char *host, const char *netid, struct netbuf *taddr,
196 char *uaddr)
197 {
198 struct address_cache *ad_cache, *cptr, *prevptr;
199
200 ad_cache = (struct address_cache *)
201 malloc(sizeof (struct address_cache));
202 if (!ad_cache) {
203 return;
204 }
205 ad_cache->ac_host = strdup(host);
206 ad_cache->ac_netid = strdup(netid);
207 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
208 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
209 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
210 (uaddr && !ad_cache->ac_uaddr)) {
211 goto out;
212 }
213 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
214 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
215 if (ad_cache->ac_taddr->buf == NULL) {
216 out:
217 free(ad_cache->ac_host);
218 free(ad_cache->ac_netid);
219 free(ad_cache->ac_uaddr);
220 free(ad_cache->ac_taddr);
221 free(ad_cache);
222 return;
223 }
224 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
225 #ifdef ND_DEBUG
226 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
227 #endif
228
229 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
230
231 rwlock_wrlock(&rpcbaddr_cache_lock);
232 if (cachesize < CACHESIZE) {
233 ad_cache->ac_next = front;
234 front = ad_cache;
235 cachesize++;
236 } else {
237 /* Free the last entry */
238 cptr = front;
239 prevptr = NULL;
240 while (cptr->ac_next) {
241 prevptr = cptr;
242 cptr = cptr->ac_next;
243 }
244
245 #ifdef ND_DEBUG
246 fprintf(stderr, "Deleted from cache: %s : %s\n",
247 cptr->ac_host, cptr->ac_netid);
248 #endif
249 free(cptr->ac_host);
250 free(cptr->ac_netid);
251 free(cptr->ac_taddr->buf);
252 free(cptr->ac_taddr);
253 free(cptr->ac_uaddr);
254
255 if (prevptr) {
256 prevptr->ac_next = NULL;
257 ad_cache->ac_next = front;
258 front = ad_cache;
259 } else {
260 front = ad_cache;
261 ad_cache->ac_next = NULL;
262 }
263 free(cptr);
264 }
265 rwlock_unlock(&rpcbaddr_cache_lock);
266 }
267
268 /*
269 * This routine will return a client handle that is connected to the
270 * rpcbind. If targaddr is non-NULL, the "universal address" of the
271 * host will be stored in *targaddr; the caller is responsible for
272 * freeing this string.
273 * On error, returns NULL and free's everything.
274 */
275 static CLIENT *
getclnthandle(const char * host,const struct netconfig * nconf,char ** targaddr)276 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
277 {
278 CLIENT *client;
279 struct netbuf *addr, taddr;
280 struct netbuf addr_to_delete;
281 struct __rpc_sockinfo si;
282 struct addrinfo hints, *res, *tres;
283 struct address_cache *ad_cache;
284 char *tmpaddr;
285
286 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
287
288 /* Get the address of the rpcbind. Check cache first */
289 client = NULL;
290 addr_to_delete.len = 0;
291 rwlock_rdlock(&rpcbaddr_cache_lock);
292 ad_cache = NULL;
293 if (host != NULL)
294 ad_cache = check_cache(host, nconf->nc_netid);
295 if (ad_cache != NULL) {
296 addr = ad_cache->ac_taddr;
297 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
298 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
299 if (client != NULL) {
300 if (targaddr)
301 *targaddr = strdup(ad_cache->ac_uaddr);
302 rwlock_unlock(&rpcbaddr_cache_lock);
303 return (client);
304 }
305 addr_to_delete.len = addr->len;
306 addr_to_delete.buf = (char *)malloc(addr->len);
307 if (addr_to_delete.buf == NULL) {
308 addr_to_delete.len = 0;
309 } else {
310 memcpy(addr_to_delete.buf, addr->buf, addr->len);
311 }
312 }
313 rwlock_unlock(&rpcbaddr_cache_lock);
314 if (addr_to_delete.len != 0) {
315 /*
316 * Assume this may be due to cache data being
317 * outdated
318 */
319 rwlock_wrlock(&rpcbaddr_cache_lock);
320 delete_cache(&addr_to_delete);
321 rwlock_unlock(&rpcbaddr_cache_lock);
322 free(addr_to_delete.buf);
323 }
324 if (!__rpc_nconf2sockinfo(nconf, &si)) {
325 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
326 return NULL;
327 }
328
329 memset(&hints, 0, sizeof hints);
330 hints.ai_family = si.si_af;
331 hints.ai_socktype = si.si_socktype;
332 hints.ai_protocol = si.si_proto;
333
334 #ifdef CLNT_DEBUG
335 printf("trying netid %s family %d proto %d socktype %d\n",
336 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
337 #endif
338
339 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
340 client = local_rpcb();
341 if (! client) {
342 #ifdef ND_DEBUG
343 clnt_pcreateerror("rpcbind clnt interface");
344 #endif
345 return (NULL);
346 } else {
347 struct sockaddr_un sun;
348 if (targaddr) {
349 *targaddr = malloc(sizeof(sun.sun_path));
350 if (*targaddr == NULL) {
351 CLNT_DESTROY(client);
352 return (NULL);
353 }
354 strncpy(*targaddr, _PATH_RPCBINDSOCK,
355 sizeof(sun.sun_path));
356 }
357 return (client);
358 }
359 } else {
360 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
361 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
362 return NULL;
363 }
364 }
365
366 for (tres = res; tres != NULL; tres = tres->ai_next) {
367 taddr.buf = tres->ai_addr;
368 taddr.len = taddr.maxlen = tres->ai_addrlen;
369
370 #ifdef ND_DEBUG
371 {
372 char *ua;
373
374 ua = taddr2uaddr(nconf, &taddr);
375 fprintf(stderr, "Got it [%s]\n", ua);
376 free(ua);
377 }
378 #endif
379
380 #ifdef ND_DEBUG
381 {
382 int i;
383
384 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
385 taddr.len, taddr.maxlen);
386 fprintf(stderr, "\tAddress is ");
387 for (i = 0; i < taddr.len; i++)
388 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
389 fprintf(stderr, "\n");
390 }
391 #endif
392 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
393 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
394 #ifdef ND_DEBUG
395 if (! client) {
396 clnt_pcreateerror("rpcbind clnt interface");
397 }
398 #endif
399
400 if (client) {
401 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
402 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
403 if (targaddr)
404 *targaddr = tmpaddr;
405 break;
406 }
407 }
408 if (res)
409 freeaddrinfo(res);
410 return (client);
411 }
412
413 /* XXX */
414 #define IN4_LOCALHOST_STRING "127.0.0.1"
415 #define IN6_LOCALHOST_STRING "::1"
416
417 /*
418 * This routine will return a client handle that is connected to the local
419 * rpcbind. Returns NULL on error and free's everything.
420 */
421 static CLIENT *
local_rpcb(void)422 local_rpcb(void)
423 {
424 CLIENT *client;
425 static struct netconfig *loopnconf;
426 static char *hostname;
427 int sock;
428 size_t tsize;
429 struct netbuf nbuf;
430 struct sockaddr_un sun;
431
432 /*
433 * Try connecting to the local rpcbind through a local socket
434 * first. If this doesn't work, try all transports defined in
435 * the netconfig file.
436 */
437 memset(&sun, 0, sizeof sun);
438 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
439 if (sock < 0)
440 goto try_nconf;
441 sun.sun_family = AF_LOCAL;
442 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
443 nbuf.len = sun.sun_len = SUN_LEN(&sun);
444 nbuf.maxlen = sizeof (struct sockaddr_un);
445 nbuf.buf = &sun;
446
447 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
448 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
449 (rpcvers_t)RPCBVERS, tsize, tsize);
450
451 if (client != NULL) {
452 /* Mark the socket to be closed in destructor */
453 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
454 return client;
455 }
456
457 /* Nobody needs this socket anymore; free the descriptor. */
458 _close(sock);
459
460 try_nconf:
461
462 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
463 mutex_lock(&loopnconf_lock);
464 if (loopnconf == NULL) {
465 struct netconfig *nconf, *tmpnconf = NULL;
466 void *nc_handle;
467 int fd;
468
469 nc_handle = setnetconfig();
470 if (nc_handle == NULL) {
471 /* fails to open netconfig file */
472 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
473 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
474 mutex_unlock(&loopnconf_lock);
475 return (NULL);
476 }
477 while ((nconf = getnetconfig(nc_handle)) != NULL) {
478 #ifdef INET6
479 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
480 #else
481 if ((
482 #endif
483 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
484 (nconf->nc_semantics == NC_TPI_COTS ||
485 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
486 fd = __rpc_nconf2fd(nconf);
487 /*
488 * Can't create a socket, assume that
489 * this family isn't configured in the kernel.
490 */
491 if (fd < 0)
492 continue;
493 _close(fd);
494 tmpnconf = nconf;
495 if (!strcmp(nconf->nc_protofmly, NC_INET))
496 hostname = IN4_LOCALHOST_STRING;
497 else
498 hostname = IN6_LOCALHOST_STRING;
499 }
500 }
501 if (tmpnconf == NULL) {
502 endnetconfig(nc_handle);
503 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
504 mutex_unlock(&loopnconf_lock);
505 return (NULL);
506 }
507 loopnconf = getnetconfigent(tmpnconf->nc_netid);
508 /* loopnconf is never freed */
509 endnetconfig(nc_handle);
510 }
511 mutex_unlock(&loopnconf_lock);
512 client = getclnthandle(hostname, loopnconf, NULL);
513 return (client);
514 }
515
516 /*
517 * Set a mapping between program, version and address.
518 * Calls the rpcbind service to do the mapping.
519 *
520 * nconf - Network structure of transport
521 * address - Services netconfig address
522 */
523 bool_t
rpcb_set(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const struct netbuf * address)524 rpcb_set(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
525 const struct netbuf *address)
526 {
527 CLIENT *client;
528 bool_t rslt = FALSE;
529 RPCB parms;
530 char uidbuf[32];
531
532 /* parameter checking */
533 if (nconf == NULL) {
534 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
535 return (FALSE);
536 }
537 if (address == NULL) {
538 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
539 return (FALSE);
540 }
541 client = local_rpcb();
542 if (! client) {
543 return (FALSE);
544 }
545
546 /* convert to universal */
547 /*LINTED const castaway*/
548 parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
549 (struct netbuf *)address);
550 if (!parms.r_addr) {
551 CLNT_DESTROY(client);
552 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
553 return (FALSE); /* no universal address */
554 }
555 parms.r_prog = program;
556 parms.r_vers = version;
557 parms.r_netid = nconf->nc_netid;
558 /*
559 * Though uid is not being used directly, we still send it for
560 * completeness. For non-unix platforms, perhaps some other
561 * string or an empty string can be sent.
562 */
563 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
564 parms.r_owner = uidbuf;
565
566 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
567 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
568 (char *)(void *)&rslt, tottimeout);
569
570 CLNT_DESTROY(client);
571 free(parms.r_addr);
572 return (rslt);
573 }
574
575 /*
576 * Remove the mapping between program, version and netbuf address.
577 * Calls the rpcbind service to do the un-mapping.
578 * If netbuf is NULL, unset for all the transports, otherwise unset
579 * only for the given transport.
580 */
581 bool_t
rpcb_unset(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf)582 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
583 {
584 CLIENT *client;
585 bool_t rslt = FALSE;
586 RPCB parms;
587 char uidbuf[32];
588
589 client = local_rpcb();
590 if (! client) {
591 return (FALSE);
592 }
593
594 parms.r_prog = program;
595 parms.r_vers = version;
596 if (nconf)
597 parms.r_netid = nconf->nc_netid;
598 else {
599 /*LINTED const castaway*/
600 parms.r_netid = (char *) &nullstring[0]; /* unsets all */
601 }
602 /*LINTED const castaway*/
603 parms.r_addr = (char *) &nullstring[0];
604 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
605 parms.r_owner = uidbuf;
606
607 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
608 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
609 (char *)(void *)&rslt, tottimeout);
610
611 CLNT_DESTROY(client);
612 return (rslt);
613 }
614
615 /*
616 * From the merged list, find the appropriate entry
617 */
618 static struct netbuf *
got_entry(rpcb_entry_list_ptr relp,const struct netconfig * nconf)619 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
620 {
621 struct netbuf *na = NULL;
622 rpcb_entry_list_ptr sp;
623 rpcb_entry *rmap;
624
625 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
626 rmap = &sp->rpcb_entry_map;
627 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
628 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
629 (nconf->nc_semantics == rmap->r_nc_semantics) &&
630 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
631 na = uaddr2taddr(nconf, rmap->r_maddr);
632 #ifdef ND_DEBUG
633 fprintf(stderr, "\tRemote address is [%s].\n",
634 rmap->r_maddr);
635 if (!na)
636 fprintf(stderr,
637 "\tCouldn't resolve remote address!\n");
638 #endif
639 break;
640 }
641 }
642 return (na);
643 }
644
645 /*
646 * Quick check to see if rpcbind is up. Tries to connect over
647 * local transport.
648 */
649 static bool_t
__rpcbind_is_up(void)650 __rpcbind_is_up(void)
651 {
652 struct netconfig *nconf;
653 struct sockaddr_un sun;
654 void *localhandle;
655 int sock;
656
657 nconf = NULL;
658 localhandle = setnetconfig();
659 while ((nconf = getnetconfig(localhandle)) != NULL) {
660 if (nconf->nc_protofmly != NULL &&
661 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
662 break;
663 }
664 endnetconfig(localhandle);
665
666 if (nconf == NULL)
667 return (FALSE);
668
669 memset(&sun, 0, sizeof sun);
670 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
671 if (sock < 0)
672 return (FALSE);
673 sun.sun_family = AF_LOCAL;
674 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
675 sun.sun_len = SUN_LEN(&sun);
676
677 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
678 _close(sock);
679 return (FALSE);
680 }
681
682 _close(sock);
683 return (TRUE);
684 }
685
686 /*
687 * An internal function which optimizes rpcb_getaddr function. It also
688 * returns the client handle that it uses to contact the remote rpcbind.
689 *
690 * The algorithm used: If the transports is TCP or UDP, it first tries
691 * version 2 (portmap), 4 and then 3 (svr4). This order should be
692 * changed in the next OS release to 4, 2 and 3. We are assuming that by
693 * that time, version 4 would be available on many machines on the network.
694 * With this algorithm, we get performance as well as a plan for
695 * obsoleting version 2.
696 *
697 * For all other transports, the algorithm remains as 4 and then 3.
698 *
699 * XXX: Due to some problems with t_connect(), we do not reuse the same client
700 * handle for COTS cases and hence in these cases we do not return the
701 * client handle. This code will change if t_connect() ever
702 * starts working properly. Also look under clnt_vc.c.
703 */
704 struct netbuf *
__rpcb_findaddr_timed(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const char * host,CLIENT ** clpp,struct timeval * tp)705 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
706 const struct netconfig *nconf, const char *host,
707 CLIENT **clpp, struct timeval *tp)
708 {
709 static bool_t check_rpcbind = TRUE;
710 CLIENT *client = NULL;
711 RPCB parms;
712 enum clnt_stat clnt_st;
713 char *ua = NULL;
714 rpcvers_t vers;
715 struct netbuf *address = NULL;
716 rpcvers_t start_vers = RPCBVERS4;
717 struct netbuf servaddr;
718
719 /* parameter checking */
720 if (nconf == NULL) {
721 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
722 return (NULL);
723 }
724
725 parms.r_addr = NULL;
726
727 /*
728 * Use default total timeout if no timeout is specified.
729 */
730 if (tp == NULL)
731 tp = &tottimeout;
732
733 #ifdef PORTMAP
734 /* Try version 2 for TCP or UDP */
735 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
736 u_short port = 0;
737 struct netbuf remote;
738 rpcvers_t pmapvers = 2;
739 struct pmap pmapparms;
740
741 /*
742 * The comment below is now very old, having
743 * been committed to FreeBSD during an import
744 * from NetBSD in 2001. I do not believe there
745 * will still be any rpcbind servers that do
746 * UDP only and, since Azure requires use of
747 * TCP for NFSv3 mounts, comment this out
748 * so that NFSv3 mounts on Azure can work.
749 */
750 #ifdef notnow
751 /*
752 * Try UDP only - there are some portmappers out
753 * there that use UDP only.
754 */
755 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
756 struct netconfig *newnconf;
757
758 if ((newnconf = getnetconfigent("udp")) == NULL) {
759 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
760 return (NULL);
761 }
762 client = getclnthandle(host, newnconf, &parms.r_addr);
763 freenetconfigent(newnconf);
764 } else
765 #endif
766 client = getclnthandle(host, nconf, &parms.r_addr);
767 if (client == NULL)
768 return (NULL);
769
770 /*
771 * Set version and retry timeout.
772 */
773 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
774 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
775
776 pmapparms.pm_prog = program;
777 pmapparms.pm_vers = version;
778 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
779 IPPROTO_UDP : IPPROTO_TCP;
780 pmapparms.pm_port = 0; /* not needed */
781 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
782 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
783 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
784 *tp);
785 if (clnt_st != RPC_SUCCESS) {
786 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
787 (clnt_st == RPC_PROGUNAVAIL))
788 goto try_rpcbind; /* Try different versions */
789 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
790 clnt_geterr(client, &rpc_createerr.cf_error);
791 goto error;
792 } else if (port == 0) {
793 address = NULL;
794 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
795 goto error;
796 }
797 port = htons(port);
798 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
799 if (((address = (struct netbuf *)
800 malloc(sizeof (struct netbuf))) == NULL) ||
801 ((address->buf = (char *)
802 malloc(remote.len)) == NULL)) {
803 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
804 clnt_geterr(client, &rpc_createerr.cf_error);
805 free(address);
806 address = NULL;
807 goto error;
808 }
809 memcpy(address->buf, remote.buf, remote.len);
810 memcpy(&((char *)address->buf)[sizeof (short)],
811 (char *)(void *)&port, sizeof (short));
812 address->len = address->maxlen = remote.len;
813 goto done;
814 }
815 #endif /* PORTMAP */
816
817 try_rpcbind:
818 /*
819 * Check if rpcbind is up. This prevents needless delays when
820 * accessing applications such as the keyserver while booting
821 * disklessly.
822 */
823 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
824 if (!__rpcbind_is_up()) {
825 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
826 rpc_createerr.cf_error.re_errno = 0;
827 goto error;
828 }
829 check_rpcbind = FALSE;
830 }
831
832 /*
833 * Now we try version 4 and then 3.
834 * We also send the remote system the address we used to
835 * contact it in case it can help to connect back with us
836 */
837 parms.r_prog = program;
838 parms.r_vers = version;
839 /*LINTED const castaway*/
840 parms.r_owner = (char *) &nullstring[0]; /* not needed; */
841 /* just for xdring */
842 parms.r_netid = nconf->nc_netid; /* not really needed */
843
844 /*
845 * If a COTS transport is being used, try getting address via CLTS
846 * transport. This works only with version 4.
847 */
848 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
849 nconf->nc_semantics == NC_TPI_COTS) {
850
851 void *handle;
852 struct netconfig *nconf_clts;
853 rpcb_entry_list_ptr relp = NULL;
854
855 if (client == NULL) {
856 /* This did not go through the above PORTMAP/TCP code */
857 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
858 while ((nconf_clts = __rpc_getconf(handle))
859 != NULL) {
860 if (strcmp(nconf_clts->nc_protofmly,
861 nconf->nc_protofmly) != 0) {
862 continue;
863 }
864 client = getclnthandle(host, nconf_clts,
865 &parms.r_addr);
866 break;
867 }
868 __rpc_endconf(handle);
869 }
870 if (client == NULL)
871 goto regular_rpcbind; /* Go the regular way */
872 } else {
873 /* This is a UDP PORTMAP handle. Change to version 4 */
874 vers = RPCBVERS4;
875 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
876 }
877 /*
878 * We also send the remote system the address we used to
879 * contact it in case it can help it connect back with us
880 */
881 if (parms.r_addr == NULL) {
882 /*LINTED const castaway*/
883 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
884 }
885
886 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
887
888 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
889 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
890 (xdrproc_t) xdr_rpcb_entry_list_ptr,
891 (char *)(void *)&relp, *tp);
892 if (clnt_st == RPC_SUCCESS) {
893 if ((address = got_entry(relp, nconf)) != NULL) {
894 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
895 (char *)(void *)&relp);
896 CLNT_CONTROL(client, CLGET_SVC_ADDR,
897 (char *)(void *)&servaddr);
898 __rpc_fixup_addr(address, &servaddr);
899 goto done;
900 }
901 /* Entry not found for this transport */
902 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
903 (char *)(void *)&relp);
904 /*
905 * XXX: should have perhaps returned with error but
906 * since the remote machine might not always be able
907 * to send the address on all transports, we try the
908 * regular way with regular_rpcbind
909 */
910 goto regular_rpcbind;
911 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
912 (clnt_st == RPC_PROGUNAVAIL)) {
913 start_vers = RPCBVERS; /* Try version 3 now */
914 goto regular_rpcbind; /* Try different versions */
915 } else {
916 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
917 clnt_geterr(client, &rpc_createerr.cf_error);
918 goto error;
919 }
920 }
921
922 regular_rpcbind:
923
924 /* Now the same transport is to be used to get the address */
925 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
926 (nconf->nc_semantics == NC_TPI_COTS))) {
927 /* A CLTS type of client - destroy it */
928 CLNT_DESTROY(client);
929 client = NULL;
930 }
931
932 if (client == NULL) {
933 client = getclnthandle(host, nconf, &parms.r_addr);
934 if (client == NULL) {
935 goto error;
936 }
937 }
938 if (parms.r_addr == NULL) {
939 /*LINTED const castaway*/
940 parms.r_addr = (char *) &nullstring[0];
941 }
942
943 /* First try from start_vers and then version 3 (RPCBVERS) */
944
945 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
946 for (vers = start_vers; vers >= RPCBVERS; vers--) {
947 /* Set the version */
948 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
949 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
950 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
951 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
952 if (clnt_st == RPC_SUCCESS) {
953 if ((ua == NULL) || (ua[0] == 0)) {
954 /* address unknown */
955 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
956 goto error;
957 }
958 address = uaddr2taddr(nconf, ua);
959 #ifdef ND_DEBUG
960 fprintf(stderr, "\tRemote address is [%s]\n", ua);
961 if (!address)
962 fprintf(stderr,
963 "\tCouldn't resolve remote address!\n");
964 #endif
965 xdr_free((xdrproc_t)xdr_wrapstring,
966 (char *)(void *)&ua);
967
968 if (! address) {
969 /* We don't know about your universal address */
970 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
971 goto error;
972 }
973 CLNT_CONTROL(client, CLGET_SVC_ADDR,
974 (char *)(void *)&servaddr);
975 __rpc_fixup_addr(address, &servaddr);
976 goto done;
977 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
978 struct rpc_err rpcerr;
979
980 clnt_geterr(client, &rpcerr);
981 if (rpcerr.re_vers.low > RPCBVERS4)
982 goto error; /* a new version, can't handle */
983 } else if (clnt_st != RPC_PROGUNAVAIL) {
984 /* Cant handle this error */
985 rpc_createerr.cf_stat = clnt_st;
986 clnt_geterr(client, &rpc_createerr.cf_error);
987 goto error;
988 }
989 }
990
991 error:
992 if (client) {
993 CLNT_DESTROY(client);
994 client = NULL;
995 }
996 done:
997 if (nconf->nc_semantics != NC_TPI_CLTS) {
998 /* This client is the connectionless one */
999 if (client) {
1000 CLNT_DESTROY(client);
1001 client = NULL;
1002 }
1003 }
1004 if (clpp) {
1005 *clpp = client;
1006 } else if (client) {
1007 CLNT_DESTROY(client);
1008 }
1009 if (parms.r_addr != NULL && parms.r_addr != nullstring)
1010 free(parms.r_addr);
1011 return (address);
1012 }
1013
1014
1015 /*
1016 * Find the mapped address for program, version.
1017 * Calls the rpcbind service remotely to do the lookup.
1018 * Uses the transport specified in nconf.
1019 * Returns FALSE (0) if no map exists, else returns 1.
1020 *
1021 * Assuming that the address is all properly allocated
1022 */
1023 bool_t
rpcb_getaddr(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,struct netbuf * address,const char * host)1024 rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
1025 struct netbuf *address, const char *host)
1026 {
1027 struct netbuf *na;
1028
1029 if ((na = __rpcb_findaddr_timed(program, version,
1030 (struct netconfig *) nconf, (char *) host,
1031 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1032 return (FALSE);
1033
1034 if (na->len > address->maxlen) {
1035 /* Too long address */
1036 free(na->buf);
1037 free(na);
1038 rpc_createerr.cf_stat = RPC_FAILED;
1039 return (FALSE);
1040 }
1041 memcpy(address->buf, na->buf, (size_t)na->len);
1042 address->len = na->len;
1043 free(na->buf);
1044 free(na);
1045 return (TRUE);
1046 }
1047
1048 /*
1049 * Get a copy of the current maps.
1050 * Calls the rpcbind service remotely to get the maps.
1051 *
1052 * It returns only a list of the services
1053 * It returns NULL on failure.
1054 */
1055 rpcblist *
rpcb_getmaps(const struct netconfig * nconf,const char * host)1056 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1057 {
1058 rpcblist_ptr head = NULL;
1059 CLIENT *client;
1060 enum clnt_stat clnt_st;
1061 rpcvers_t vers = 0;
1062
1063 client = getclnthandle(host, nconf, NULL);
1064 if (client == NULL) {
1065 return (head);
1066 }
1067 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1068 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1069 (char *)(void *)&head, tottimeout);
1070 if (clnt_st == RPC_SUCCESS)
1071 goto done;
1072
1073 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1074 (clnt_st != RPC_PROGUNAVAIL)) {
1075 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1076 clnt_geterr(client, &rpc_createerr.cf_error);
1077 goto done;
1078 }
1079
1080 /* fall back to earlier version */
1081 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1082 if (vers == RPCBVERS4) {
1083 vers = RPCBVERS;
1084 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1085 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1086 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1087 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1088 goto done;
1089 }
1090 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1091 clnt_geterr(client, &rpc_createerr.cf_error);
1092
1093 done:
1094 CLNT_DESTROY(client);
1095 return (head);
1096 }
1097
1098 /*
1099 * rpcbinder remote-call-service interface.
1100 * This routine is used to call the rpcbind remote call service
1101 * which will look up a service program in the address maps, and then
1102 * remotely call that routine with the given parameters. This allows
1103 * programs to do a lookup and call in one step.
1104 *
1105 * nconf -Netconfig structure
1106 * host - Remote host name
1107 * proc - Remote proc identifiers
1108 * xdrargs, xdrres; XDR routines
1109 * argsp, resp - Argument and Result
1110 * tout - Timeout value for this call
1111 * addr_ptr - Preallocated netbuf address
1112 */
1113 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)1114 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog,
1115 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp,
1116 xdrproc_t xdrres, caddr_t resp, struct timeval tout,
1117 const struct netbuf *addr_ptr)
1118 {
1119 CLIENT *client;
1120 enum clnt_stat stat;
1121 struct r_rpcb_rmtcallargs a;
1122 struct r_rpcb_rmtcallres r;
1123 rpcvers_t rpcb_vers;
1124
1125 stat = 0;
1126 client = getclnthandle(host, nconf, NULL);
1127 if (client == NULL) {
1128 return (RPC_FAILED);
1129 }
1130 /*LINTED const castaway*/
1131 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1132 a.prog = prog;
1133 a.vers = vers;
1134 a.proc = proc;
1135 a.args.args_val = argsp;
1136 a.xdr_args = xdrargs;
1137 r.addr = NULL;
1138 r.results.results_val = resp;
1139 r.xdr_res = xdrres;
1140
1141 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1142 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1143 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1144 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1145 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1146 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1147 struct netbuf *na;
1148 /*LINTED const castaway*/
1149 na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1150 if (!na) {
1151 stat = RPC_N2AXLATEFAILURE;
1152 /*LINTED const castaway*/
1153 ((struct netbuf *) addr_ptr)->len = 0;
1154 goto error;
1155 }
1156 if (na->len > addr_ptr->maxlen) {
1157 /* Too long address */
1158 stat = RPC_FAILED; /* XXX A better error no */
1159 free(na->buf);
1160 free(na);
1161 /*LINTED const castaway*/
1162 ((struct netbuf *) addr_ptr)->len = 0;
1163 goto error;
1164 }
1165 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1166 /*LINTED const castaway*/
1167 ((struct netbuf *)addr_ptr)->len = na->len;
1168 free(na->buf);
1169 free(na);
1170 break;
1171 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1172 (stat != RPC_PROGUNAVAIL)) {
1173 goto error;
1174 }
1175 }
1176 error:
1177 CLNT_DESTROY(client);
1178 if (r.addr)
1179 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1180 return (stat);
1181 }
1182
1183 /*
1184 * Gets the time on the remote host.
1185 * Returns 1 if succeeds else 0.
1186 */
1187 bool_t
rpcb_gettime(const char * host,time_t * timep)1188 rpcb_gettime(const char *host, time_t *timep)
1189 {
1190 CLIENT *client = NULL;
1191 void *handle;
1192 struct netconfig *nconf;
1193 rpcvers_t vers;
1194 enum clnt_stat st;
1195
1196
1197 if ((host == NULL) || (host[0] == 0)) {
1198 time(timep);
1199 return (TRUE);
1200 }
1201
1202 if ((handle = __rpc_setconf("netpath")) == NULL) {
1203 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1204 return (FALSE);
1205 }
1206 rpc_createerr.cf_stat = RPC_SUCCESS;
1207 while (client == NULL) {
1208 if ((nconf = __rpc_getconf(handle)) == NULL) {
1209 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1210 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1211 break;
1212 }
1213 client = getclnthandle(host, nconf, NULL);
1214 if (client)
1215 break;
1216 }
1217 __rpc_endconf(handle);
1218 if (client == (CLIENT *) NULL) {
1219 return (FALSE);
1220 }
1221
1222 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1223 (xdrproc_t) xdr_void, NULL,
1224 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1225
1226 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1227 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1228 if (vers == RPCBVERS4) {
1229 /* fall back to earlier version */
1230 vers = RPCBVERS;
1231 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1232 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1233 (xdrproc_t) xdr_void, NULL,
1234 (xdrproc_t) xdr_int, (char *)(void *)timep,
1235 tottimeout);
1236 }
1237 }
1238 CLNT_DESTROY(client);
1239 return (st == RPC_SUCCESS? TRUE: FALSE);
1240 }
1241
1242 /*
1243 * Converts taddr to universal address. This routine should never
1244 * really be called because local n2a libraries are always provided.
1245 */
1246 char *
rpcb_taddr2uaddr(struct netconfig * nconf,struct netbuf * taddr)1247 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1248 {
1249 CLIENT *client;
1250 char *uaddr = NULL;
1251
1252
1253 /* parameter checking */
1254 if (nconf == NULL) {
1255 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1256 return (NULL);
1257 }
1258 if (taddr == NULL) {
1259 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1260 return (NULL);
1261 }
1262 client = local_rpcb();
1263 if (! client) {
1264 return (NULL);
1265 }
1266
1267 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1268 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1269 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1270 CLNT_DESTROY(client);
1271 return (uaddr);
1272 }
1273
1274 /*
1275 * Converts universal address to netbuf. This routine should never
1276 * really be called because local n2a libraries are always provided.
1277 */
1278 struct netbuf *
rpcb_uaddr2taddr(struct netconfig * nconf,char * uaddr)1279 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1280 {
1281 CLIENT *client;
1282 struct netbuf *taddr;
1283
1284
1285 /* parameter checking */
1286 if (nconf == NULL) {
1287 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1288 return (NULL);
1289 }
1290 if (uaddr == NULL) {
1291 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1292 return (NULL);
1293 }
1294 client = local_rpcb();
1295 if (! client) {
1296 return (NULL);
1297 }
1298
1299 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1300 if (taddr == NULL) {
1301 CLNT_DESTROY(client);
1302 return (NULL);
1303 }
1304 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1305 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1306 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1307 tottimeout) != RPC_SUCCESS) {
1308 free(taddr);
1309 taddr = NULL;
1310 }
1311 CLNT_DESTROY(client);
1312 return (taddr);
1313 }
1314