1 /*
2 * The contents of this file are subject to the Sun Standards
3 * License Version 1.0 the (the "License";) You may not use
4 * this file except in compliance with the License. You may
5 * obtain a copy of the License at lib/libc/rpc/LICENSE
6 *
7 * Software distributed under the License is distributed on
8 * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
9 * express or implied. See the License for the specific
10 * language governing rights and limitations under the License.
11 *
12 * The Original Code is Copyright 1998 by Sun Microsystems, Inc
13 *
14 * The Initial Developer of the Original Code is: Sun
15 * Microsystems, Inc.
16 *
17 * All Rights Reserved.
18 *
19 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
20 * unrestricted use provided that this legend is included on all tape
21 * media and as a part of the software program in whole or part. Users
22 * may copy or modify Sun RPC without charge, but are not authorized
23 * to license or distribute it to anyone else except as part of a product or
24 * program developed by the user.
25 *
26 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
27 * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
29 *
30 * Sun RPC is provided with no support and without any obligation on the
31 * part of Sun Microsystems, Inc. to assist in its use, correction,
32 * modification or enhancement.
33 *
34 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
35 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
36 * OR ANY PART THEREOF.
37 *
38 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
39 * or profits or other special, indirect and consequential damages, even if
40 * Sun has been advised of the possibility of such damages.
41 *
42 * Sun Microsystems, Inc.
43 * 2550 Garcia Avenue
44 * Mountain View, California 94043
45 * @(#)rpcb_clnt.c 1.27 94/04/24 SMI; 1.30 89/06/21 Copyr 1988 Sun Micro
46 * $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $
47 * $FreeBSD: src/lib/libc/rpc/rpcb_clnt.c,v 1.17 2007/09/20 22:35:24 matteo Exp $
48 */
49 /*
50 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
51 */
52
53 /*
54 * rpcb_clnt.c
55 * interface to rpcbind rpc service.
56 *
57 * Copyright (C) 1988, Sun Microsystems, Inc.
58 */
59
60 #include "namespace.h"
61 #include "reentrant.h"
62 #include <sys/types.h>
63 #include <sys/socket.h>
64 #include <sys/un.h>
65 #include <sys/utsname.h>
66 #include <rpc/rpc.h>
67 #include <rpc/rpcb_prot.h>
68 #include <rpc/nettype.h>
69 #include <netconfig.h>
70 #ifdef PORTMAP
71 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
72 #include <rpc/pmap_prot.h>
73 #endif /* PORTMAP */
74 #include <stdio.h>
75 #include <errno.h>
76 #include <stdlib.h>
77 #include <string.h>
78 #include <unistd.h>
79 #include <netdb.h>
80 #include <syslog.h>
81 #include "un-namespace.h"
82
83 #include "rpc_com.h"
84 #include "mt_misc.h"
85
86 static struct timeval tottimeout = { 60, 0 };
87 static const struct timeval rmttimeout = { 3, 0 };
88 static struct timeval rpcbrmttime = { 15, 0 };
89
90 extern bool_t xdr_wrapstring(XDR *, char **);
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 switch (request) {
130 case CLCR_GET_RPCB_TIMEOUT:
131 *(struct timeval *)info = tottimeout;
132 break;
133 case CLCR_SET_RPCB_TIMEOUT:
134 tottimeout = *(struct timeval *)info;
135 break;
136 case CLCR_SET_LOWVERS:
137 __rpc_lowvers = *(int *)info;
138 break;
139 case CLCR_GET_LOWVERS:
140 *(int *)info = __rpc_lowvers;
141 break;
142 default:
143 return (FALSE);
144 }
145 return (TRUE);
146 }
147
148 /*
149 * It might seem that a reader/writer lock would be more reasonable here.
150 * However because getclnthandle(), the only user of the cache functions,
151 * may do a delete_cache() operation if a check_cache() fails to return an
152 * address useful to clnt_tli_create(), we may as well use a mutex.
153 */
154 /*
155 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
156 * block all clnt_create's if we are trying to connect to a host that's down,
157 * since the lock will be held all during that time.
158 */
159
160 /*
161 * The routines check_cache(), add_cache(), delete_cache() manage the
162 * cache of rpcbind addresses for (host, netid).
163 */
164
165 static struct address_cache *
check_cache(const char * host,const char * netid)166 check_cache(const char *host, const char *netid)
167 {
168 struct address_cache *cptr;
169
170 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
171
172 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
173 if (!strcmp(cptr->ac_host, host) &&
174 !strcmp(cptr->ac_netid, netid)) {
175 #ifdef ND_DEBUG
176 fprintf(stderr, "Found cache entry for %s: %s\n",
177 host, netid);
178 #endif
179 return (cptr);
180 }
181 }
182 return (NULL);
183 }
184
185 static void
delete_cache(struct netbuf * addr)186 delete_cache(struct netbuf *addr)
187 {
188 struct address_cache *cptr, *prevptr = NULL;
189
190 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
191 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
192 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
193 free(cptr->ac_host);
194 free(cptr->ac_netid);
195 free(cptr->ac_taddr->buf);
196 free(cptr->ac_taddr);
197 if (cptr->ac_uaddr)
198 free(cptr->ac_uaddr);
199 if (prevptr)
200 prevptr->ac_next = cptr->ac_next;
201 else
202 front = cptr->ac_next;
203 free(cptr);
204 cachesize--;
205 break;
206 }
207 prevptr = cptr;
208 }
209 }
210
211 static void
add_cache(const char * host,const char * netid,struct netbuf * taddr,char * uaddr)212 add_cache(const char *host, const char *netid, struct netbuf *taddr,
213 char *uaddr)
214 {
215 struct address_cache *ad_cache, *cptr, *prevptr;
216
217 ad_cache = (struct address_cache *)
218 malloc(sizeof (struct address_cache));
219 if (!ad_cache) {
220 return;
221 }
222 ad_cache->ac_host = strdup(host);
223 ad_cache->ac_netid = strdup(netid);
224 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
225 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
226 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
227 (uaddr && !ad_cache->ac_uaddr)) {
228 goto out;
229 }
230 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
231 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
232 if (ad_cache->ac_taddr->buf == NULL) {
233 out:
234 if (ad_cache->ac_host)
235 free(ad_cache->ac_host);
236 if (ad_cache->ac_netid)
237 free(ad_cache->ac_netid);
238 if (ad_cache->ac_uaddr)
239 free(ad_cache->ac_uaddr);
240 if (ad_cache->ac_taddr)
241 free(ad_cache->ac_taddr);
242 free(ad_cache);
243 return;
244 }
245 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
246 #ifdef ND_DEBUG
247 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
248 #endif
249
250 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
251
252 rwlock_wrlock(&rpcbaddr_cache_lock);
253 if (cachesize < CACHESIZE) {
254 ad_cache->ac_next = front;
255 front = ad_cache;
256 cachesize++;
257 } else {
258 /* Free the last entry */
259 cptr = front;
260 prevptr = NULL;
261 while (cptr->ac_next) {
262 prevptr = cptr;
263 cptr = cptr->ac_next;
264 }
265
266 #ifdef ND_DEBUG
267 fprintf(stderr, "Deleted from cache: %s : %s\n",
268 cptr->ac_host, cptr->ac_netid);
269 #endif
270 free(cptr->ac_host);
271 free(cptr->ac_netid);
272 free(cptr->ac_taddr->buf);
273 free(cptr->ac_taddr);
274 if (cptr->ac_uaddr)
275 free(cptr->ac_uaddr);
276
277 if (prevptr) {
278 prevptr->ac_next = NULL;
279 ad_cache->ac_next = front;
280 front = ad_cache;
281 } else {
282 front = ad_cache;
283 ad_cache->ac_next = NULL;
284 }
285 free(cptr);
286 }
287 rwlock_unlock(&rpcbaddr_cache_lock);
288 }
289
290 /*
291 * This routine will return a client handle that is connected to the
292 * rpcbind. If targaddr is non-NULL, the "universal address" of the
293 * host will be stored in *targaddr; the caller is responsible for
294 * freeing this string.
295 * On error, returns NULL and free's everything.
296 */
297 static CLIENT *
getclnthandle(const char * host,const struct netconfig * nconf,char ** targaddr)298 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
299 {
300 CLIENT *client;
301 struct netbuf *addr, taddr;
302 struct netbuf addr_to_delete;
303 struct __rpc_sockinfo si;
304 struct addrinfo hints, *res, *tres;
305 struct address_cache *ad_cache;
306 char *tmpaddr;
307
308 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
309
310 /* Get the address of the rpcbind. Check cache first */
311 client = NULL;
312 addr_to_delete.len = 0;
313 rwlock_rdlock(&rpcbaddr_cache_lock);
314 ad_cache = NULL;
315 if (host != NULL)
316 ad_cache = check_cache(host, nconf->nc_netid);
317 if (ad_cache != NULL) {
318 addr = ad_cache->ac_taddr;
319 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
320 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
321 if (client != NULL) {
322 if (targaddr)
323 *targaddr = strdup(ad_cache->ac_uaddr);
324 rwlock_unlock(&rpcbaddr_cache_lock);
325 return (client);
326 }
327 addr_to_delete.len = addr->len;
328 addr_to_delete.buf = (char *)malloc(addr->len);
329 if (addr_to_delete.buf == NULL) {
330 addr_to_delete.len = 0;
331 } else {
332 memcpy(addr_to_delete.buf, addr->buf, addr->len);
333 }
334 }
335 rwlock_unlock(&rpcbaddr_cache_lock);
336 if (addr_to_delete.len != 0) {
337 /*
338 * Assume this may be due to cache data being
339 * outdated
340 */
341 rwlock_wrlock(&rpcbaddr_cache_lock);
342 delete_cache(&addr_to_delete);
343 rwlock_unlock(&rpcbaddr_cache_lock);
344 free(addr_to_delete.buf);
345 }
346 if (!__rpc_nconf2sockinfo(nconf, &si)) {
347 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
348 return NULL;
349 }
350
351 memset(&hints, 0, sizeof hints);
352 hints.ai_family = si.si_af;
353 hints.ai_socktype = si.si_socktype;
354 hints.ai_protocol = si.si_proto;
355
356 #ifdef CLNT_DEBUG
357 printf("trying netid %s family %d proto %d socktype %d\n",
358 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
359 #endif
360
361 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
362 client = local_rpcb();
363 if (! client) {
364 #ifdef ND_DEBUG
365 clnt_pcreateerror("rpcbind clnt interface");
366 #endif
367 return (NULL);
368 } else {
369 struct sockaddr_un sun;
370 if (targaddr) {
371 *targaddr = malloc(sizeof(sun.sun_path));
372 if (*targaddr == NULL) {
373 CLNT_DESTROY(client);
374 return (NULL);
375 }
376 strncpy(*targaddr, _PATH_RPCBINDSOCK,
377 sizeof(sun.sun_path));
378 }
379 return (client);
380 }
381 } else {
382 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
383 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
384 return NULL;
385 }
386 }
387
388 for (tres = res; tres != NULL; tres = tres->ai_next) {
389 taddr.buf = tres->ai_addr;
390 taddr.len = taddr.maxlen = tres->ai_addrlen;
391
392 #ifdef ND_DEBUG
393 {
394 char *ua;
395
396 ua = taddr2uaddr(nconf, &taddr);
397 fprintf(stderr, "Got it [%s]\n", ua);
398 free(ua);
399 }
400 #endif
401
402 #ifdef ND_DEBUG
403 {
404 int i;
405
406 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
407 taddr.len, taddr.maxlen);
408 fprintf(stderr, "\tAddress is ");
409 for (i = 0; i < taddr.len; i++)
410 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
411 fprintf(stderr, "\n");
412 }
413 #endif
414 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
415 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
416 #ifdef ND_DEBUG
417 if (! client) {
418 clnt_pcreateerror("rpcbind clnt interface");
419 }
420 #endif
421
422 if (client) {
423 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
424 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
425 if (targaddr)
426 *targaddr = tmpaddr;
427 break;
428 }
429 }
430 if (res)
431 freeaddrinfo(res);
432 return (client);
433 }
434
435 /* XXX */
436 #define IN4_LOCALHOST_STRING "127.0.0.1"
437 #define IN6_LOCALHOST_STRING "::1"
438
439 /*
440 * This routine will return a client handle that is connected to the local
441 * rpcbind. Returns NULL on error and free's everything.
442 */
443 static CLIENT *
local_rpcb(void)444 local_rpcb(void)
445 {
446 CLIENT *client;
447 static struct netconfig *loopnconf;
448 static char *hostname;
449 int sock;
450 size_t tsize;
451 struct netbuf nbuf;
452 struct sockaddr_un sun;
453
454 /*
455 * Try connecting to the local rpcbind through a local socket
456 * first. If this doesn't work, try all transports defined in
457 * the netconfig file.
458 */
459 memset(&sun, 0, sizeof sun);
460 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
461 if (sock < 0)
462 goto try_nconf;
463 sun.sun_family = AF_LOCAL;
464 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
465 nbuf.len = sun.sun_len = SUN_LEN(&sun);
466 nbuf.maxlen = sizeof (struct sockaddr_un);
467 nbuf.buf = &sun;
468
469 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
470 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
471 (rpcvers_t)RPCBVERS, tsize, tsize);
472
473 if (client != NULL) {
474 /* Mark the socket to be closed in destructor */
475 CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
476 return client;
477 }
478
479 /* Nobody needs this socket anymore; free the descriptor. */
480 _close(sock);
481
482 try_nconf:
483
484 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
485 mutex_lock(&loopnconf_lock);
486 if (loopnconf == NULL) {
487 struct netconfig *nconf, *tmpnconf = NULL;
488 void *nc_handle;
489 int fd;
490
491 nc_handle = setnetconfig();
492 if (nc_handle == NULL) {
493 /* fails to open netconfig file */
494 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
495 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
496 mutex_unlock(&loopnconf_lock);
497 return (NULL);
498 }
499 while ((nconf = getnetconfig(nc_handle)) != NULL) {
500 #ifdef INET6
501 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
502 #else
503 if ((
504 #endif
505 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
506 (nconf->nc_semantics == NC_TPI_COTS ||
507 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
508 fd = __rpc_nconf2fd(nconf);
509 /*
510 * Can't create a socket, assume that
511 * this family isn't configured in the kernel.
512 */
513 if (fd < 0)
514 continue;
515 _close(fd);
516 tmpnconf = nconf;
517 if (!strcmp(nconf->nc_protofmly, NC_INET))
518 hostname = IN4_LOCALHOST_STRING;
519 else
520 hostname = IN6_LOCALHOST_STRING;
521 }
522 }
523 if (tmpnconf == NULL) {
524 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
525 mutex_unlock(&loopnconf_lock);
526 return (NULL);
527 }
528 loopnconf = getnetconfigent(tmpnconf->nc_netid);
529 /* loopnconf is never freed */
530 endnetconfig(nc_handle);
531 }
532 mutex_unlock(&loopnconf_lock);
533 client = getclnthandle(hostname, loopnconf, NULL);
534 return (client);
535 }
536
537 /*
538 * Set a mapping between program, version and address.
539 * Calls the rpcbind service to do the mapping.
540 */
541 bool_t
rpcb_set(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const struct netbuf * address)542 rpcb_set(rpcprog_t program, rpcvers_t version,
543 const struct netconfig *nconf, /* Network structure of transport */
544 const struct netbuf *address) /* Services netconfig address */
545 {
546 CLIENT *client;
547 bool_t rslt = FALSE;
548 RPCB parms;
549 char uidbuf[32];
550
551 /* parameter checking */
552 if (nconf == NULL) {
553 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
554 return (FALSE);
555 }
556 if (address == NULL) {
557 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
558 return (FALSE);
559 }
560 client = local_rpcb();
561 if (! client) {
562 return (FALSE);
563 }
564
565 /* convert to universal */
566 /*LINTED const castaway*/
567 parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
568 (struct netbuf *)address);
569 if (!parms.r_addr) {
570 CLNT_DESTROY(client);
571 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
572 return (FALSE); /* no universal address */
573 }
574 parms.r_prog = program;
575 parms.r_vers = version;
576 parms.r_netid = nconf->nc_netid;
577 /*
578 * Though uid is not being used directly, we still send it for
579 * completeness. For non-unix platforms, perhaps some other
580 * string or an empty string can be sent.
581 */
582 snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
583 parms.r_owner = uidbuf;
584
585 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
586 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
587 (char *)(void *)&rslt, tottimeout);
588
589 CLNT_DESTROY(client);
590 free(parms.r_addr);
591 return (rslt);
592 }
593
594 /*
595 * Remove the mapping between program, version and netbuf address.
596 * Calls the rpcbind service to do the un-mapping.
597 * If netbuf is NULL, unset for all the transports, otherwise unset
598 * only for the given transport.
599 */
600 bool_t
rpcb_unset(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf)601 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
602 {
603 CLIENT *client;
604 bool_t rslt = FALSE;
605 RPCB parms;
606 char uidbuf[32];
607
608 client = local_rpcb();
609 if (! client) {
610 return (FALSE);
611 }
612
613 parms.r_prog = program;
614 parms.r_vers = version;
615 if (nconf)
616 parms.r_netid = nconf->nc_netid;
617 else {
618 /*LINTED const castaway*/
619 parms.r_netid = (char *) &nullstring[0]; /* unsets all */
620 }
621 /*LINTED const castaway*/
622 parms.r_addr = (char *) &nullstring[0];
623 snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
624 parms.r_owner = uidbuf;
625
626 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
627 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
628 (char *)(void *)&rslt, tottimeout);
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 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
645 rmap = &sp->rpcb_entry_map;
646 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
647 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
648 (nconf->nc_semantics == rmap->r_nc_semantics) &&
649 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
650 na = uaddr2taddr(nconf, rmap->r_maddr);
651 #ifdef ND_DEBUG
652 fprintf(stderr, "\tRemote address is [%s].\n",
653 rmap->r_maddr);
654 if (!na)
655 fprintf(stderr,
656 "\tCouldn't resolve remote address!\n");
657 #endif
658 break;
659 }
660 }
661 return (na);
662 }
663
664 /*
665 * Quick check to see if rpcbind is up. Tries to connect over
666 * local transport.
667 */
668 static bool_t
__rpcbind_is_up(void)669 __rpcbind_is_up(void)
670 {
671 struct netconfig *nconf;
672 struct sockaddr_un sun;
673 void *localhandle;
674 int sock;
675
676 nconf = NULL;
677 localhandle = setnetconfig();
678 while ((nconf = getnetconfig(localhandle)) != NULL) {
679 if (nconf->nc_protofmly != NULL &&
680 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
681 break;
682 }
683 if (nconf == NULL)
684 return (FALSE);
685
686 endnetconfig(localhandle);
687
688 memset(&sun, 0, sizeof sun);
689 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
690 if (sock < 0)
691 return (FALSE);
692 sun.sun_family = AF_LOCAL;
693 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
694 sun.sun_len = SUN_LEN(&sun);
695
696 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
697 _close(sock);
698 return (FALSE);
699 }
700
701 _close(sock);
702 return (TRUE);
703 }
704
705 /*
706 * An internal function which optimizes rpcb_getaddr function. It also
707 * returns the client handle that it uses to contact the remote rpcbind.
708 *
709 * The algorithm used: If the transports is TCP or UDP, it first tries
710 * version 2 (portmap), 4 and then 3 (svr4). This order should be
711 * changed in the next OS release to 4, 2 and 3. We are assuming that by
712 * that time, version 4 would be available on many machines on the network.
713 * With this algorithm, we get performance as well as a plan for
714 * obsoleting version 2.
715 *
716 * For all other transports, the algorithm remains as 4 and then 3.
717 *
718 * XXX: Due to some problems with t_connect(), we do not reuse the same client
719 * handle for COTS cases and hence in these cases we do not return the
720 * client handle. This code will change if t_connect() ever
721 * starts working properly. Also look under clnt_vc.c.
722 */
723 struct netbuf *
__rpcb_findaddr_timed(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,const char * host,CLIENT ** clpp,struct timeval * tp)724 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
725 const struct netconfig *nconf, const char *host,
726 CLIENT **clpp, struct timeval *tp)
727 {
728 static bool_t check_rpcbind = TRUE;
729 CLIENT *client = NULL;
730 RPCB parms;
731 enum clnt_stat clnt_st;
732 char *ua = NULL;
733 rpcvers_t vers;
734 struct netbuf *address = NULL;
735 rpcvers_t start_vers = RPCBVERS4;
736 struct netbuf servaddr;
737
738 /* parameter checking */
739 if (nconf == NULL) {
740 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
741 return (NULL);
742 }
743
744 parms.r_addr = NULL;
745
746 /*
747 * Use default total timeout if no timeout is specified.
748 */
749 if (tp == NULL)
750 tp = &tottimeout;
751
752 #ifdef PORTMAP
753 /* Try version 2 for TCP or UDP */
754 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
755 u_short port = 0;
756 struct netbuf remote;
757 rpcvers_t pmapvers = 2;
758 struct pmap pmapparms;
759
760 /*
761 * Try UDP only - there are some portmappers out
762 * there that use UDP only.
763 */
764 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
765 struct netconfig *newnconf;
766
767 if ((newnconf = getnetconfigent("udp")) == NULL) {
768 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
769 return (NULL);
770 }
771 client = getclnthandle(host, newnconf, &parms.r_addr);
772 freenetconfigent(newnconf);
773 } else {
774 client = getclnthandle(host, nconf, &parms.r_addr);
775 }
776 if (client == NULL)
777 return (NULL);
778
779 /*
780 * Set version and retry timeout.
781 */
782 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
783 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
784
785 pmapparms.pm_prog = program;
786 pmapparms.pm_vers = version;
787 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
788 IPPROTO_UDP : IPPROTO_TCP;
789 pmapparms.pm_port = 0; /* not needed */
790 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
791 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
792 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
793 *tp);
794 if (clnt_st != RPC_SUCCESS) {
795 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
796 (clnt_st == RPC_PROGUNAVAIL))
797 goto try_rpcbind; /* Try different versions */
798 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
799 clnt_geterr(client, &rpc_createerr.cf_error);
800 goto error;
801 } else if (port == 0) {
802 address = NULL;
803 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
804 goto error;
805 }
806 port = htons(port);
807 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
808 if (((address = (struct netbuf *)
809 malloc(sizeof (struct netbuf))) == NULL) ||
810 ((address->buf = (char *)
811 malloc(remote.len)) == NULL)) {
812 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
813 clnt_geterr(client, &rpc_createerr.cf_error);
814 if (address) {
815 free(address);
816 address = NULL;
817 }
818 goto error;
819 }
820 memcpy(address->buf, remote.buf, remote.len);
821 memcpy(&((char *)address->buf)[sizeof (short)],
822 (char *)(void *)&port, sizeof (short));
823 address->len = address->maxlen = remote.len;
824 goto done;
825 }
826 #endif /* PORTMAP */
827
828 try_rpcbind:
829 /*
830 * Check if rpcbind is up. This prevents needless delays when
831 * accessing applications such as the keyserver while booting
832 * disklessly.
833 */
834 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
835 if (!__rpcbind_is_up()) {
836 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
837 rpc_createerr.cf_error.re_errno = 0;
838 goto error;
839 }
840 check_rpcbind = FALSE;
841 }
842
843 /*
844 * Now we try version 4 and then 3.
845 * We also send the remote system the address we used to
846 * contact it in case it can help to connect back with us
847 */
848 parms.r_prog = program;
849 parms.r_vers = version;
850 /*LINTED const castaway*/
851 parms.r_owner = (char *) &nullstring[0]; /* not needed; */
852 /* just for xdring */
853 parms.r_netid = nconf->nc_netid; /* not really needed */
854
855 /*
856 * If a COTS transport is being used, try getting address via CLTS
857 * transport. This works only with version 4.
858 */
859 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
860 nconf->nc_semantics == NC_TPI_COTS) {
861
862 void *handle;
863 struct netconfig *nconf_clts;
864 rpcb_entry_list_ptr relp = NULL;
865
866 if (client == NULL) {
867 /* This did not go through the above PORTMAP/TCP code */
868 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
869 while ((nconf_clts = __rpc_getconf(handle))
870 != NULL) {
871 if (strcmp(nconf_clts->nc_protofmly,
872 nconf->nc_protofmly) != 0) {
873 continue;
874 }
875 client = getclnthandle(host, nconf_clts,
876 &parms.r_addr);
877 break;
878 }
879 __rpc_endconf(handle);
880 }
881 if (client == NULL)
882 goto regular_rpcbind; /* Go the regular way */
883 } else {
884 /* This is a UDP PORTMAP handle. Change to version 4 */
885 vers = RPCBVERS4;
886 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
887 }
888 /*
889 * We also send the remote system the address we used to
890 * contact it in case it can help it connect back with us
891 */
892 if (parms.r_addr == NULL) {
893 /*LINTED const castaway*/
894 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
895 }
896
897 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
898
899 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
900 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
901 (xdrproc_t) xdr_rpcb_entry_list_ptr,
902 (char *)(void *)&relp, *tp);
903 if (clnt_st == RPC_SUCCESS) {
904 if ((address = got_entry(relp, nconf)) != NULL) {
905 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
906 (char *)(void *)&relp);
907 CLNT_CONTROL(client, CLGET_SVC_ADDR,
908 (char *)(void *)&servaddr);
909 __rpc_fixup_addr(address, &servaddr);
910 goto done;
911 }
912 /* Entry not found for this transport */
913 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
914 (char *)(void *)&relp);
915 /*
916 * XXX: should have perhaps returned with error but
917 * since the remote machine might not always be able
918 * to send the address on all transports, we try the
919 * regular way with regular_rpcbind
920 */
921 goto regular_rpcbind;
922 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
923 (clnt_st == RPC_PROGUNAVAIL)) {
924 start_vers = RPCBVERS; /* Try version 3 now */
925 goto regular_rpcbind; /* Try different versions */
926 } else {
927 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
928 clnt_geterr(client, &rpc_createerr.cf_error);
929 goto error;
930 }
931 }
932
933 regular_rpcbind:
934
935 /* Now the same transport is to be used to get the address */
936 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
937 (nconf->nc_semantics == NC_TPI_COTS))) {
938 /* A CLTS type of client - destroy it */
939 CLNT_DESTROY(client);
940 client = NULL;
941 }
942
943 if (client == NULL) {
944 client = getclnthandle(host, nconf, &parms.r_addr);
945 if (client == NULL) {
946 goto error;
947 }
948 }
949 if (parms.r_addr == NULL) {
950 /*LINTED const castaway*/
951 parms.r_addr = (char *) &nullstring[0];
952 }
953
954 /* First try from start_vers and then version 3 (RPCBVERS) */
955
956 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
957 for (vers = start_vers; vers >= RPCBVERS; vers--) {
958 /* Set the version */
959 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
960 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
961 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
962 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
963 if (clnt_st == RPC_SUCCESS) {
964 if ((ua == NULL) || (ua[0] == 0)) {
965 /* address unknown */
966 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
967 goto error;
968 }
969 address = uaddr2taddr(nconf, ua);
970 #ifdef ND_DEBUG
971 fprintf(stderr, "\tRemote address is [%s]\n", ua);
972 if (!address)
973 fprintf(stderr,
974 "\tCouldn't resolve remote address!\n");
975 #endif
976 xdr_free((xdrproc_t)xdr_wrapstring,
977 (char *)(void *)&ua);
978
979 if (! address) {
980 /* We don't know about your universal address */
981 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
982 goto error;
983 }
984 CLNT_CONTROL(client, CLGET_SVC_ADDR,
985 (char *)(void *)&servaddr);
986 __rpc_fixup_addr(address, &servaddr);
987 goto done;
988 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
989 struct rpc_err rpcerr;
990
991 clnt_geterr(client, &rpcerr);
992 if (rpcerr.re_vers.low > RPCBVERS4)
993 goto error; /* a new version, can't handle */
994 } else if (clnt_st != RPC_PROGUNAVAIL) {
995 /* Cant handle this error */
996 rpc_createerr.cf_stat = clnt_st;
997 clnt_geterr(client, &rpc_createerr.cf_error);
998 goto error;
999 }
1000 }
1001
1002 error:
1003 if (client) {
1004 CLNT_DESTROY(client);
1005 client = NULL;
1006 }
1007 done:
1008 if (nconf->nc_semantics != NC_TPI_CLTS) {
1009 /* This client is the connectionless one */
1010 if (client) {
1011 CLNT_DESTROY(client);
1012 client = NULL;
1013 }
1014 }
1015 if (clpp) {
1016 *clpp = client;
1017 } else if (client) {
1018 CLNT_DESTROY(client);
1019 }
1020 if (parms.r_addr != NULL && parms.r_addr != nullstring)
1021 free(parms.r_addr);
1022 return (address);
1023 }
1024
1025
1026 /*
1027 * Find the mapped address for program, version.
1028 * Calls the rpcbind service remotely to do the lookup.
1029 * Uses the transport specified in nconf.
1030 * Returns FALSE (0) if no map exists, else returns 1.
1031 *
1032 * Assuming that the address is all properly allocated
1033 */
1034 int
rpcb_getaddr(rpcprog_t program,rpcvers_t version,const struct netconfig * nconf,struct netbuf * address,const char * host)1035 rpcb_getaddr(rpcprog_t program, rpcvers_t version,
1036 const struct netconfig *nconf, struct netbuf *address,
1037 const char *host)
1038 {
1039 struct netbuf *na;
1040
1041 if ((na = __rpcb_findaddr_timed(program, version,
1042 (struct netconfig *) nconf, (char *) host,
1043 NULL, NULL)) == NULL)
1044 return (FALSE);
1045
1046 if (na->len > address->maxlen) {
1047 /* Too long address */
1048 free(na->buf);
1049 free(na);
1050 rpc_createerr.cf_stat = RPC_FAILED;
1051 return (FALSE);
1052 }
1053 memcpy(address->buf, na->buf, (size_t)na->len);
1054 address->len = na->len;
1055 free(na->buf);
1056 free(na);
1057 return (TRUE);
1058 }
1059
1060 /*
1061 * Get a copy of the current maps.
1062 * Calls the rpcbind service remotely to get the maps.
1063 *
1064 * It returns only a list of the services
1065 * It returns NULL on failure.
1066 */
1067 rpcblist *
rpcb_getmaps(const struct netconfig * nconf,const char * host)1068 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1069 {
1070 rpcblist_ptr head = NULL;
1071 CLIENT *client;
1072 enum clnt_stat clnt_st;
1073 rpcvers_t vers = 0;
1074
1075 client = getclnthandle(host, nconf, NULL);
1076 if (client == NULL) {
1077 return (head);
1078 }
1079 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1080 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1081 (char *)(void *)&head, tottimeout);
1082 if (clnt_st == RPC_SUCCESS)
1083 goto done;
1084
1085 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1086 (clnt_st != RPC_PROGUNAVAIL)) {
1087 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1088 clnt_geterr(client, &rpc_createerr.cf_error);
1089 goto done;
1090 }
1091
1092 /* fall back to earlier version */
1093 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1094 if (vers == RPCBVERS4) {
1095 vers = RPCBVERS;
1096 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1097 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1098 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1099 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1100 goto done;
1101 }
1102 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1103 clnt_geterr(client, &rpc_createerr.cf_error);
1104
1105 done:
1106 CLNT_DESTROY(client);
1107 return (head);
1108 }
1109
1110 /*
1111 * rpcbinder remote-call-service interface.
1112 * This routine is used to call the rpcbind remote call service
1113 * which will look up a service program in the address maps, and then
1114 * remotely call that routine with the given parameters. This allows
1115 * programs to do a lookup and call in one step.
1116 */
1117 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)1118 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog,
1119 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp,
1120 xdrproc_t xdrres, caddr_t resp, struct timeval tout,
1121 const struct netbuf *addr_ptr)
1122 {
1123 CLIENT *client;
1124 enum clnt_stat stat;
1125 struct r_rpcb_rmtcallargs a;
1126 struct r_rpcb_rmtcallres r;
1127 rpcvers_t rpcb_vers;
1128
1129 stat = 0;
1130 client = getclnthandle(host, nconf, NULL);
1131 if (client == NULL) {
1132 return (RPC_FAILED);
1133 }
1134 /*LINTED const castaway*/
1135 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1136 a.prog = prog;
1137 a.vers = vers;
1138 a.proc = proc;
1139 a.args.args_val = argsp;
1140 a.xdr_args = xdrargs;
1141 r.addr = NULL;
1142 r.results.results_val = resp;
1143 r.xdr_res = xdrres;
1144
1145 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1146 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1147 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1148 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1149 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1150 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1151 struct netbuf *na;
1152 /*LINTED const castaway*/
1153 na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1154 if (!na) {
1155 stat = RPC_N2AXLATEFAILURE;
1156 /*LINTED const castaway*/
1157 ((struct netbuf *) addr_ptr)->len = 0;
1158 goto error;
1159 }
1160 if (na->len > addr_ptr->maxlen) {
1161 /* Too long address */
1162 stat = RPC_FAILED; /* XXX A better error no */
1163 free(na->buf);
1164 free(na);
1165 /*LINTED const castaway*/
1166 ((struct netbuf *) addr_ptr)->len = 0;
1167 goto error;
1168 }
1169 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1170 /*LINTED const castaway*/
1171 ((struct netbuf *)addr_ptr)->len = na->len;
1172 free(na->buf);
1173 free(na);
1174 break;
1175 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1176 (stat != RPC_PROGUNAVAIL)) {
1177 goto error;
1178 }
1179 }
1180 error:
1181 CLNT_DESTROY(client);
1182 if (r.addr)
1183 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1184 return (stat);
1185 }
1186
1187 /*
1188 * Gets the time on the remote host.
1189 * Returns 1 if succeeds else 0.
1190 */
1191 bool_t
rpcb_gettime(const char * host,time_t * timep)1192 rpcb_gettime(const char *host, time_t *timep)
1193 {
1194 CLIENT *client = NULL;
1195 void *handle;
1196 struct netconfig *nconf;
1197 rpcvers_t vers;
1198 enum clnt_stat st;
1199
1200
1201 if ((host == NULL) || (host[0] == 0)) {
1202 time(timep);
1203 return (TRUE);
1204 }
1205
1206 if ((handle = __rpc_setconf("netpath")) == NULL) {
1207 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1208 return (FALSE);
1209 }
1210 rpc_createerr.cf_stat = RPC_SUCCESS;
1211 while (client == NULL) {
1212 if ((nconf = __rpc_getconf(handle)) == NULL) {
1213 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1214 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1215 break;
1216 }
1217 client = getclnthandle(host, nconf, NULL);
1218 if (client)
1219 break;
1220 }
1221 __rpc_endconf(handle);
1222 if (client == NULL) {
1223 return (FALSE);
1224 }
1225
1226 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1227 (xdrproc_t) xdr_void, NULL,
1228 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1229
1230 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1231 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1232 if (vers == RPCBVERS4) {
1233 /* fall back to earlier version */
1234 vers = RPCBVERS;
1235 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1236 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1237 (xdrproc_t) xdr_void, NULL,
1238 (xdrproc_t) xdr_int, (char *)(void *)timep,
1239 tottimeout);
1240 }
1241 }
1242 CLNT_DESTROY(client);
1243 return (st == RPC_SUCCESS);
1244 }
1245
1246 /*
1247 * Converts taddr to universal address. This routine should never
1248 * really be called because local n2a libraries are always provided.
1249 */
1250 char *
rpcb_taddr2uaddr(struct netconfig * nconf,struct netbuf * taddr)1251 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1252 {
1253 CLIENT *client;
1254 char *uaddr = NULL;
1255
1256
1257 /* parameter checking */
1258 if (nconf == NULL) {
1259 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1260 return (NULL);
1261 }
1262 if (taddr == NULL) {
1263 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1264 return (NULL);
1265 }
1266 client = local_rpcb();
1267 if (! client) {
1268 return (NULL);
1269 }
1270
1271 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1272 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1273 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1274 CLNT_DESTROY(client);
1275 return (uaddr);
1276 }
1277
1278 /*
1279 * Converts universal address to netbuf. This routine should never
1280 * really be called because local n2a libraries are always provided.
1281 */
1282 struct netbuf *
rpcb_uaddr2taddr(struct netconfig * nconf,char * uaddr)1283 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1284 {
1285 CLIENT *client;
1286 struct netbuf *taddr;
1287
1288
1289 /* parameter checking */
1290 if (nconf == NULL) {
1291 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1292 return (NULL);
1293 }
1294 if (uaddr == NULL) {
1295 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1296 return (NULL);
1297 }
1298 client = local_rpcb();
1299 if (! client) {
1300 return (NULL);
1301 }
1302
1303 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1304 if (taddr == NULL) {
1305 CLNT_DESTROY(client);
1306 return (NULL);
1307 }
1308 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1309 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1310 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1311 tottimeout) != RPC_SUCCESS) {
1312 free(taddr);
1313 taddr = NULL;
1314 }
1315 CLNT_DESTROY(client);
1316 return (taddr);
1317 }
1318