4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30 /*
31 * Portions of this source code were derived from Berkeley
32 * 4.3 BSD under license from the Regents of the University of
33 * California.
34 */
35
36 #pragma ident "%Z%%M% %I% %E% SMI"
37
38 /*
39 * interface to rpcbind rpc service.
40 */
41
42 #include "mt.h"
43 #include "rpc_mt.h"
44 #include <assert.h>
45 #include <rpc/rpc.h>
46 #include <rpc/rpcb_prot.h>
47 #include <netconfig.h>
48 #include <netdir.h>
49 #include <rpc/nettype.h>
50 #include <syslog.h>
51 #ifdef PORTMAP
52 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
53 #include <rpc/pmap_prot.h>
54 #endif
55 #ifdef ND_DEBUG
56 #include <stdio.h>
57 #endif
58 #include <sys/utsname.h>
59 #include <errno.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <unistd.h>
63
64 static struct timeval tottimeout = { 60, 0 };
65 static const struct timeval rmttimeout = { 3, 0 };
66 static struct timeval rpcbrmttime = { 15, 0 };
67
68 extern bool_t xdr_wrapstring(XDR *, char **);
69
70 static const char nullstring[] = "\000";
71
72 extern CLIENT *_clnt_tli_create_timed(int, const struct netconfig *,
73 struct netbuf *, rpcprog_t, rpcvers_t, uint_t, uint_t,
74 const struct timeval *);
75
76 static CLIENT *_getclnthandle_timed(char *, struct netconfig *, char **,
77 struct timeval *);
153 */
154 extern rwlock_t rpcbaddr_cache_lock;
155
156 /*
157 * The routines check_cache(), add_cache(), delete_cache() manage the
158 * cache of rpcbind addresses for (host, netid).
159 */
160
161 static struct address_cache *
162 check_cache(char *host, char *netid)
163 {
164 struct address_cache *cptr;
165
166 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
167
168 assert(RW_READ_HELD(&rpcbaddr_cache_lock));
169 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
170 if ((strcmp(cptr->ac_host, host) == 0) &&
171 (strcmp(cptr->ac_netid, netid) == 0) &&
172 (time(NULL) <= cptr->ac_maxtime)) {
173 #ifdef ND_DEBUG
174 fprintf(stderr, "Found cache entry for %s: %s\n",
175 host, netid);
176 #endif
177 return (cptr);
178 }
179 }
180 return (NULL);
181 }
182
183 static void
184 delete_cache(struct netbuf *addr)
185 {
186 struct address_cache *cptr, *prevptr = NULL;
187
188 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
189 assert(RW_WRITE_HELD(&rpcbaddr_cache_lock));
190 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
191 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
192 free(cptr->ac_host);
193 free(cptr->ac_netid);
194 free(cptr->ac_taddr->buf);
195 free(cptr->ac_taddr);
196 if (cptr->ac_uaddr)
216 if (!ad_cache) {
217 goto memerr;
218 }
219 ad_cache->ac_maxtime = time(NULL) + CACHE_TTL;
220 ad_cache->ac_host = strdup(host);
221 ad_cache->ac_netid = strdup(netid);
222 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
223 ad_cache->ac_taddr = malloc(sizeof (struct netbuf));
224 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
225 (uaddr && !ad_cache->ac_uaddr)) {
226 goto memerr1;
227 }
228
229 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
230 ad_cache->ac_taddr->buf = malloc(taddr->len);
231 if (ad_cache->ac_taddr->buf == NULL) {
232 goto memerr1;
233 }
234
235 (void) memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
236 #ifdef ND_DEBUG
237 (void) fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
238 #endif
239
240 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
241
242 (void) rw_wrlock(&rpcbaddr_cache_lock);
243 if (cachesize < CACHESIZE) {
244 ad_cache->ac_next = front;
245 front = ad_cache;
246 cachesize++;
247 } else {
248 /* Free the last entry */
249 cptr = front;
250 prevptr = NULL;
251 while (cptr->ac_next) {
252 prevptr = cptr;
253 cptr = cptr->ac_next;
254 }
255
256 #ifdef ND_DEBUG
257 fprintf(stderr, "Deleted from cache: %s : %s\n",
258 cptr->ac_host, cptr->ac_netid);
259 #endif
260 free(cptr->ac_host);
261 free(cptr->ac_netid);
262 free(cptr->ac_taddr->buf);
263 free(cptr->ac_taddr);
264 if (cptr->ac_uaddr)
265 free(cptr->ac_uaddr);
266
267 if (prevptr) {
268 prevptr->ac_next = NULL;
269 ad_cache->ac_next = front;
270 front = ad_cache;
271 } else {
272 front = ad_cache;
273 ad_cache->ac_next = NULL;
274 }
275 free(cptr);
276 }
277 (void) rw_unlock(&rpcbaddr_cache_lock);
278 return;
279 memerr1:
364 addr_to_delete.buf = malloc(addr->len);
365 if (addr_to_delete.buf == NULL) {
366 addr_to_delete.len = 0;
367 } else {
368 (void) memcpy(addr_to_delete.buf, addr->buf, addr->len);
369 }
370 }
371 (void) rw_unlock(&rpcbaddr_cache_lock);
372 if (addr_to_delete.len != 0) {
373 /*
374 * Assume this may be due to cache data being
375 * outdated
376 */
377 (void) rw_wrlock(&rpcbaddr_cache_lock);
378 delete_cache(&addr_to_delete);
379 (void) rw_unlock(&rpcbaddr_cache_lock);
380 free(addr_to_delete.buf);
381 }
382 rpcbind_hs.h_host = host;
383 rpcbind_hs.h_serv = "rpcbind";
384 #ifdef ND_DEBUG
385 fprintf(stderr, "rpcbind client routines: diagnostics :\n");
386 fprintf(stderr, "\tGetting address for (%s, %s, %s) ... \n",
387 rpcbind_hs.h_host, rpcbind_hs.h_serv, nconf->nc_netid);
388 #endif
389
390 if ((neterr = netdir_getbyname(nconf, &rpcbind_hs, &nas)) != 0) {
391 if (neterr == ND_NOHOST)
392 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
393 else
394 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
395 return (NULL);
396 }
397 /* XXX nas should perhaps be cached for better performance */
398
399 for (j = 0; j < nas->n_cnt; j++) {
400 addr = &(nas->n_addrs[j]);
401 #ifdef ND_DEBUG
402 {
403 int i;
404 char *ua;
405
406 ua = taddr2uaddr(nconf, &(nas->n_addrs[j]));
407 fprintf(stderr, "Got it [%s]\n", ua);
408 free(ua);
409
410 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
411 addr->len, addr->maxlen);
412 fprintf(stderr, "\tAddress is ");
413 for (i = 0; i < addr->len; i++)
414 fprintf(stderr, "%u.", addr->buf[i]);
415 fprintf(stderr, "\n");
416 }
417 #endif
418 client = _clnt_tli_create_timed(RPC_ANYFD, nconf, addr, RPCBPROG,
419 RPCBVERS4, 0, 0, tp);
420 if (client)
421 break;
422 }
423 #ifdef ND_DEBUG
424 if (!client) {
425 clnt_pcreateerror("rpcbind clnt interface");
426 }
427 #endif
428
429 if (client) {
430 tmpaddr = targaddr ? taddr2uaddr(nconf, addr) : NULL;
431 add_cache(host, nconf->nc_netid, addr, tmpaddr);
432 if (targaddr) {
433 *targaddr = tmpaddr;
434 }
435 }
436 netdir_free((char *)nas, ND_ADDRLIST);
437 return (client);
438 }
439
440 /*
441 * This routine will return a client handle that is connected to the local
442 * rpcbind. Returns NULL on error and free's everything.
443 */
444 static CLIENT *
445 local_rpcb(void)
446 {
447 static struct netconfig *loopnconf;
448 static char *hostname;
449 extern mutex_t loopnconf_lock;
450
451 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
452 (void) mutex_lock(&loopnconf_lock);
453 if (loopnconf == NULL) {
454 struct utsname utsname;
455 struct netconfig *nconf, *tmpnconf = NULL;
456 void *nc_handle;
457
458 if (hostname == NULL) {
459 #if defined(__i386) && !defined(__amd64)
460 if ((_nuname(&utsname) == -1) ||
461 #else
462 if ((uname(&utsname) == -1) ||
463 #endif
464 ((hostname = strdup(utsname.nodename)) == NULL)) {
465 syslog(LOG_ERR, "local_rpcb : strdup failed.");
466 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
467 (void) mutex_unlock(&loopnconf_lock);
468 return (NULL);
469 }
470 }
471 nc_handle = setnetconfig();
472 if (nc_handle == NULL) {
473 /* fails to open netconfig file */
474 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
475 (void) mutex_unlock(&loopnconf_lock);
476 return (NULL);
477 }
478 while (nconf = getnetconfig(nc_handle)) {
479 if (strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
480 tmpnconf = nconf;
481 if (nconf->nc_semantics == NC_TPI_CLTS)
482 break;
483 }
484 }
485 if (tmpnconf == NULL) {
486 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
487 (void) mutex_unlock(&loopnconf_lock);
488 return (NULL);
489 }
490 loopnconf = getnetconfigent(tmpnconf->nc_netid);
582 return (rslt);
583 }
584
585 /*
586 * From the merged list, find the appropriate entry
587 */
588 static struct netbuf *
589 got_entry(rpcb_entry_list_ptr relp, struct netconfig *nconf)
590 {
591 struct netbuf *na = NULL;
592 rpcb_entry_list_ptr sp;
593 rpcb_entry *rmap;
594
595 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
596 rmap = &sp->rpcb_entry_map;
597 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
598 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
599 (nconf->nc_semantics == rmap->r_nc_semantics) &&
600 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != NULL)) {
601 na = uaddr2taddr(nconf, rmap->r_maddr);
602 #ifdef ND_DEBUG
603 fprintf(stderr, "\tRemote address is [%s].\n",
604 rmap->r_maddr);
605 if (!na)
606 fprintf(stderr,
607 "\tCouldn't resolve remote address!\n");
608 #endif
609 break;
610 }
611 }
612 return (na);
613 }
614
615 /*
616 * Quick check to see if rpcbind is up. Tries to connect over
617 * local transport.
618 */
619 bool_t
620 __rpcbind_is_up(void)
621 {
622 struct utsname name;
623 char uaddr[SYS_NMLN];
624 struct netbuf *addr;
625 int fd;
626 struct t_call *sndcall;
627 struct netconfig *netconf;
628 bool_t res;
629
630 #if defined(__i386) && !defined(__amd64)
631 if (_nuname(&name) == -1)
632 #else
633 if (uname(&name) == -1)
634 #endif
635 return (TRUE);
636
637 if ((fd = t_open("/dev/ticotsord", O_RDWR, NULL)) == -1)
638 return (TRUE);
639
640 if (t_bind(fd, NULL, NULL) == -1) {
641 (void) t_close(fd);
642 return (TRUE);
643 }
644
645 /* LINTED pointer cast */
646 if ((sndcall = (struct t_call *)t_alloc(fd, T_CALL, 0)) == NULL) {
647 (void) t_close(fd);
648 return (TRUE);
649 }
650
651 uaddr[0] = '\0';
652 (void) strcpy(uaddr, name.nodename);
653 (void) strcat(uaddr, ".rpc");
654 if ((netconf = getnetconfigent("ticotsord")) == NULL) {
655 (void) t_free((char *)sndcall, T_CALL);
656 (void) t_close(fd);
657 return (FALSE);
658 }
659 addr = uaddr2taddr(netconf, uaddr);
660 freenetconfigent(netconf);
661 if (addr == NULL || addr->buf == NULL) {
662 if (addr)
663 free(addr);
664 (void) t_free((char *)sndcall, T_CALL);
665 (void) t_close(fd);
666 return (FALSE);
667 }
668 sndcall->addr.maxlen = addr->maxlen;
669 sndcall->addr.len = addr->len;
670 sndcall->addr.buf = addr->buf;
671
672 if (t_connect(fd, sndcall, NULL) == -1)
673 res = FALSE;
674 else
675 res = TRUE;
676
677 sndcall->addr.maxlen = sndcall->addr.len = 0;
678 sndcall->addr.buf = NULL;
679 (void) t_free((char *)sndcall, T_CALL);
680 free(addr->buf);
681 free(addr);
682 (void) t_close(fd);
683
684 return (res);
685 }
686
687
688 /*
689 * An internal function which optimizes rpcb_getaddr function. It also
690 * returns the client handle that it uses to contact the remote rpcbind.
691 *
692 * The algorithm used: If the transports is TCP or UDP, it first tries
693 * version 2 (portmap), 4 and then 3 (svr4). This order should be
694 * changed in the next OS release to 4, 2 and 3. We are assuming that by
695 * that time, version 4 would be available on many machines on the network.
696 * With this algorithm, we get performance as well as a plan for
697 * obsoleting version 2.
698 *
699 * For all other transports, the algorithm remains as 4 and then 3.
700 *
701 * XXX: Due to some problems with t_connect(), we do not reuse the same client
702 * handle for COTS cases and hence in these cases we do not return the
703 * client handle. This code will change if t_connect() ever
704 * starts working properly. Also look under clnt_vc.c.
705 */
706 struct netbuf *
707 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
708 struct netconfig *nconf, char *host, CLIENT **clpp, struct timeval *tp)
709 {
710 static bool_t check_rpcbind = TRUE;
711 CLIENT *client = NULL;
712 RPCB parms;
713 enum clnt_stat clnt_st;
714 char *ua = NULL;
715 uint_t vers;
716 struct netbuf *address = NULL;
717 uint_t start_vers = RPCBVERS4;
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 ushort_t port = 0;
737 struct netbuf remote;
738 uint_t pmapvers = 2;
739 struct pmap pmapparms;
740
741 /*
742 * Try UDP only - there are some portmappers out
743 * there that use UDP only.
744 */
745 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
746 struct netconfig *newnconf;
747 void *handle;
748
749 if ((handle = __rpc_setconf("udp")) == NULL) {
750 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
751 return (NULL);
752 }
753
754 /*
755 * The following to reinforce that you can
756 * only request for remote address through
757 * the same transport you are requesting.
758 * ie. requesting unversial address
759 * of IPv4 has to be carried through IPv4.
760 * Can't use IPv6 to send out the request.
761 * The mergeaddr in rpcbind can't handle
762 * this.
763 */
764 for (;;) {
765 if ((newnconf = __rpc_getconf(handle))
766 == NULL) {
767 __rpc_endconf(handle);
768 rpc_createerr.cf_stat =
769 RPC_UNKNOWNPROTO;
770 return (NULL);
771 }
772 /*
773 * here check the protocol family to
774 * be consistent with the request one
775 */
776 if (strcmp(newnconf->nc_protofmly,
777 nconf->nc_protofmly) == NULL)
778 break;
779 }
780
781 client = _getclnthandle_timed(host, newnconf,
782 &parms.r_addr, tp);
783 __rpc_endconf(handle);
784 } else {
785 client = _getclnthandle_timed(host, nconf,
786 &parms.r_addr, tp);
787 }
788 if (client == NULL)
789 return (NULL);
790
791 /*
792 * Set version and retry timeout.
793 */
794 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
795 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
796
797 pmapparms.pm_prog = program;
798 pmapparms.pm_vers = version;
799 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
800 IPPROTO_UDP : IPPROTO_TCP;
801 pmapparms.pm_port = 0; /* not needed */
802 clnt_st = CLNT_CALL(client, PMAPPROC_GETPORT,
803 (xdrproc_t)xdr_pmap, (caddr_t)&pmapparms,
804 (xdrproc_t)xdr_u_short, (caddr_t)&port,
805 *tp);
806 if (clnt_st != RPC_SUCCESS) {
807 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
808 (clnt_st == RPC_PROGUNAVAIL))
809 goto try_rpcbind; /* Try different versions */
810 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
811 clnt_geterr(client, &rpc_createerr.cf_error);
812 goto error;
813 } else if (port == 0) {
814 address = NULL;
815 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
816 goto error;
817 }
818 port = htons(port);
819 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
820 if (((address = malloc(sizeof (struct netbuf))) == NULL) ||
821 ((address->buf = malloc(remote.len)) == NULL)) {
822 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
823 clnt_geterr(client, &rpc_createerr.cf_error);
824 if (address) {
825 free(address);
826 address = NULL;
827 }
828 goto error;
829 }
830 (void) memcpy(address->buf, remote.buf, remote.len);
831 (void) memcpy(&address->buf[sizeof (short)], &port,
832 sizeof (short));
833 address->len = address->maxlen = remote.len;
834 goto done;
835 }
836 #endif
837
838 try_rpcbind:
839 /*
840 * Check if rpcbind is up. This prevents needless delays when
841 * accessing applications such as the keyserver while booting
842 * disklessly.
843 */
844 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
845 if (!__rpcbind_is_up()) {
846 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
847 rpc_createerr.cf_error.re_errno = 0;
848 rpc_createerr.cf_error.re_terrno = 0;
849 goto error;
850 }
851 check_rpcbind = FALSE;
852 }
853
854 /*
855 * Now we try version 4 and then 3.
856 * We also send the remote system the address we used to
857 * contact it in case it can help to connect back with us
858 */
859 parms.r_prog = program;
860 parms.r_vers = version;
861 parms.r_owner = (char *)&nullstring[0]; /* not needed; */
862 /* just for xdring */
863 parms.r_netid = nconf->nc_netid; /* not really needed */
864
865 /*
866 * If a COTS transport is being used, try getting address via CLTS
867 * transport. This works only with version 4.
868 */
869 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
870 nconf->nc_semantics == NC_TPI_COTS) {
871 void *handle;
872 struct netconfig *nconf_clts;
873 rpcb_entry_list_ptr relp = NULL;
874
875 if (client == NULL) {
876 /* This did not go through the above PORTMAP/TCP code */
877 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
878 while ((nconf_clts = __rpc_getconf(handle))
879 != NULL) {
880 if (strcmp(nconf_clts->nc_protofmly,
881 nconf->nc_protofmly) != 0) {
882 continue;
883 }
884 client = _getclnthandle_timed(host,
885 nconf_clts, &parms.r_addr,
886 tp);
887 break;
888 }
889 __rpc_endconf(handle);
890 }
891 if (client == NULL)
892 goto regular_rpcbind; /* Go the regular way */
893 } else {
894 /* This is a UDP PORTMAP handle. Change to version 4 */
895 vers = RPCBVERS4;
896 CLNT_CONTROL(client, CLSET_VERS, (char *)&vers);
897 }
898 /*
899 * We also send the remote system the address we used to
900 * contact it in case it can help it connect back with us
901 */
902 if (parms.r_addr == NULL) {
903 parms.r_addr = strdup(""); /* for XDRing */
904 if (parms.r_addr == NULL) {
905 syslog(LOG_ERR, "__rpcb_findaddr_timed: "
906 "strdup failed.");
907 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
908 address = NULL;
909 goto error;
910 }
911 }
912
913 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
914
915 clnt_st = CLNT_CALL(client, RPCBPROC_GETADDRLIST,
916 (xdrproc_t)xdr_rpcb, (char *)&parms,
917 (xdrproc_t)xdr_rpcb_entry_list_ptr,
918 (char *)&relp, *tp);
919 if (clnt_st == RPC_SUCCESS) {
920 if (address = got_entry(relp, nconf)) {
921 xdr_free((xdrproc_t)xdr_rpcb_entry_list_ptr,
922 (char *)&relp);
923 goto done;
924 }
925 /* Entry not found for this transport */
926 xdr_free((xdrproc_t)xdr_rpcb_entry_list_ptr,
927 (char *)&relp);
928 /*
929 * XXX: should have perhaps returned with error but
930 * since the remote machine might not always be able
931 * to send the address on all transports, we try the
932 * regular way with regular_rpcbind
933 */
934 goto regular_rpcbind;
935 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
936 (clnt_st == RPC_PROGUNAVAIL)) {
937 start_vers = RPCBVERS; /* Try version 3 now */
938 goto regular_rpcbind; /* Try different versions */
939 } else {
940 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
941 clnt_geterr(client, &rpc_createerr.cf_error);
942 goto error;
943 }
944 }
945
946 regular_rpcbind:
947
948 /* Now the same transport is to be used to get the address */
949 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
950 (nconf->nc_semantics == NC_TPI_COTS))) {
951 /* A CLTS type of client - destroy it */
952 CLNT_DESTROY(client);
953 client = NULL;
954 free(parms.r_addr);
955 parms.r_addr = NULL;
956 }
957
958 if (client == NULL) {
959 client = _getclnthandle_timed(host, nconf, &parms.r_addr, tp);
960 if (client == NULL) {
961 address = NULL;
962 goto error;
963 }
964 }
965 if (parms.r_addr == NULL) {
966 parms.r_addr = strdup(""); /* for XDRing */
967 if (parms.r_addr == NULL) {
968 syslog(LOG_ERR, "__rpcb_findaddr_timed: "
969 "strdup failed.");
970 address = NULL;
971 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
972 goto error;
973 }
974 }
975
976 /* First try from start_vers and then version 3 (RPCBVERS) */
977
978 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
979 for (vers = start_vers; vers >= RPCBVERS; vers--) {
980 /* Set the version */
981 CLNT_CONTROL(client, CLSET_VERS, (char *)&vers);
982 clnt_st = CLNT_CALL(client, RPCBPROC_GETADDR,
983 (xdrproc_t)xdr_rpcb, (char *)&parms,
984 (xdrproc_t)xdr_wrapstring,
985 (char *)&ua, *tp);
986 if (clnt_st == RPC_SUCCESS) {
987 if ((ua == NULL) || (ua[0] == NULL)) {
988 if (ua != NULL)
989 xdr_free(xdr_wrapstring, (char *)&ua);
990
991 /* address unknown */
992 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
993 goto error;
994 }
995 address = uaddr2taddr(nconf, ua);
996 #ifdef ND_DEBUG
997 fprintf(stderr, "\tRemote address is [%s]\n", ua);
998 if (!address)
999 fprintf(stderr,
1000 "\tCouldn't resolve remote address!\n");
1001 #endif
1002 xdr_free((xdrproc_t)xdr_wrapstring, (char *)&ua);
1003
1004 if (!address) {
1005 /* We don't know about your universal address */
1006 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
1007 goto error;
1008 }
1009 goto done;
1010 }
1011 if (clnt_st == RPC_PROGVERSMISMATCH) {
1012 struct rpc_err rpcerr;
1013
1014 clnt_geterr(client, &rpcerr);
1015 if (rpcerr.re_vers.low > RPCBVERS4)
1016 goto error; /* a new version, can't handle */
1017 } else if (clnt_st != RPC_PROGUNAVAIL) {
1018 /* Cant handle this error */
1019 goto error;
1020 }
1021 }
1022
1023 if ((address == NULL) || (address->len == 0)) {
1024 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
1025 clnt_geterr(client, &rpc_createerr.cf_error);
1026 }
1027
1028 error:
1029 if (client) {
1030 CLNT_DESTROY(client);
1031 client = NULL;
1032 }
1033 done:
1034 if (nconf->nc_semantics != NC_TPI_CLTS) {
1035 /* This client is the connectionless one */
1036 if (client) {
1037 CLNT_DESTROY(client);
1038 client = NULL;
1039 }
1040 }
1041 if (clpp) {
1042 *clpp = client;
1043 } else if (client) {
1044 CLNT_DESTROY(client);
1045 }
1046 if (parms.r_addr)
1047 free(parms.r_addr);
1048 return (address);
1049 }
1050
1051
1052 /*
1053 * Find the mapped address for program, version.
1054 * Calls the rpcbind service remotely to do the lookup.
1055 * Uses the transport specified in nconf.
1056 * Returns FALSE (0) if no map exists, else returns 1.
1057 *
1058 * Assuming that the address is all properly allocated
1059 */
1060 int
1061 rpcb_getaddr(const rpcprog_t program, const rpcvers_t version,
1062 const struct netconfig *nconf, struct netbuf *address, const char *host)
1063 {
1064 struct netbuf *na;
1065
1066 if ((na = __rpcb_findaddr_timed(program, version,
|
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright 2014 Gary Mills
25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
30 /* All Rights Reserved */
31 /*
32 * Portions of this source code were derived from Berkeley
33 * 4.3 BSD under license from the Regents of the University of
34 * California.
35 */
36
37 /*
38 * interface to rpcbind rpc service.
39 */
40
41 #include "mt.h"
42 #include "rpc_mt.h"
43 #include <assert.h>
44 #include <rpc/rpc.h>
45 #include <rpc/rpcb_prot.h>
46 #include <netconfig.h>
47 #include <netdir.h>
48 #include <netdb.h>
49 #include <rpc/nettype.h>
50 #include <syslog.h>
51 #ifdef PORTMAP
52 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
53 #include <rpc/pmap_prot.h>
54 #endif
55 #include <sys/utsname.h>
56 #include <errno.h>
57 #include <stdlib.h>
58 #include <string.h>
59 #include <unistd.h>
60
61 static struct timeval tottimeout = { 60, 0 };
62 static const struct timeval rmttimeout = { 3, 0 };
63 static struct timeval rpcbrmttime = { 15, 0 };
64
65 extern bool_t xdr_wrapstring(XDR *, char **);
66
67 static const char nullstring[] = "\000";
68
69 extern CLIENT *_clnt_tli_create_timed(int, const struct netconfig *,
70 struct netbuf *, rpcprog_t, rpcvers_t, uint_t, uint_t,
71 const struct timeval *);
72
73 static CLIENT *_getclnthandle_timed(char *, struct netconfig *, char **,
74 struct timeval *);
150 */
151 extern rwlock_t rpcbaddr_cache_lock;
152
153 /*
154 * The routines check_cache(), add_cache(), delete_cache() manage the
155 * cache of rpcbind addresses for (host, netid).
156 */
157
158 static struct address_cache *
159 check_cache(char *host, char *netid)
160 {
161 struct address_cache *cptr;
162
163 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
164
165 assert(RW_READ_HELD(&rpcbaddr_cache_lock));
166 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
167 if ((strcmp(cptr->ac_host, host) == 0) &&
168 (strcmp(cptr->ac_netid, netid) == 0) &&
169 (time(NULL) <= cptr->ac_maxtime)) {
170 return (cptr);
171 }
172 }
173 return (NULL);
174 }
175
176 static void
177 delete_cache(struct netbuf *addr)
178 {
179 struct address_cache *cptr, *prevptr = NULL;
180
181 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
182 assert(RW_WRITE_HELD(&rpcbaddr_cache_lock));
183 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
184 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
185 free(cptr->ac_host);
186 free(cptr->ac_netid);
187 free(cptr->ac_taddr->buf);
188 free(cptr->ac_taddr);
189 if (cptr->ac_uaddr)
209 if (!ad_cache) {
210 goto memerr;
211 }
212 ad_cache->ac_maxtime = time(NULL) + CACHE_TTL;
213 ad_cache->ac_host = strdup(host);
214 ad_cache->ac_netid = strdup(netid);
215 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
216 ad_cache->ac_taddr = malloc(sizeof (struct netbuf));
217 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
218 (uaddr && !ad_cache->ac_uaddr)) {
219 goto memerr1;
220 }
221
222 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
223 ad_cache->ac_taddr->buf = malloc(taddr->len);
224 if (ad_cache->ac_taddr->buf == NULL) {
225 goto memerr1;
226 }
227
228 (void) memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
229
230 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
231
232 (void) rw_wrlock(&rpcbaddr_cache_lock);
233 if (cachesize < CACHESIZE) {
234 ad_cache->ac_next = front;
235 front = ad_cache;
236 cachesize++;
237 } else {
238 /* Free the last entry */
239 cptr = front;
240 prevptr = NULL;
241 while (cptr->ac_next) {
242 prevptr = cptr;
243 cptr = cptr->ac_next;
244 }
245
246 free(cptr->ac_host);
247 free(cptr->ac_netid);
248 free(cptr->ac_taddr->buf);
249 free(cptr->ac_taddr);
250 if (cptr->ac_uaddr)
251 free(cptr->ac_uaddr);
252
253 if (prevptr) {
254 prevptr->ac_next = NULL;
255 ad_cache->ac_next = front;
256 front = ad_cache;
257 } else {
258 front = ad_cache;
259 ad_cache->ac_next = NULL;
260 }
261 free(cptr);
262 }
263 (void) rw_unlock(&rpcbaddr_cache_lock);
264 return;
265 memerr1:
350 addr_to_delete.buf = malloc(addr->len);
351 if (addr_to_delete.buf == NULL) {
352 addr_to_delete.len = 0;
353 } else {
354 (void) memcpy(addr_to_delete.buf, addr->buf, addr->len);
355 }
356 }
357 (void) rw_unlock(&rpcbaddr_cache_lock);
358 if (addr_to_delete.len != 0) {
359 /*
360 * Assume this may be due to cache data being
361 * outdated
362 */
363 (void) rw_wrlock(&rpcbaddr_cache_lock);
364 delete_cache(&addr_to_delete);
365 (void) rw_unlock(&rpcbaddr_cache_lock);
366 free(addr_to_delete.buf);
367 }
368 rpcbind_hs.h_host = host;
369 rpcbind_hs.h_serv = "rpcbind";
370
371 if ((neterr = netdir_getbyname(nconf, &rpcbind_hs, &nas)) != 0) {
372 if (neterr == ND_NOHOST)
373 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
374 else
375 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
376 return (NULL);
377 }
378 /* XXX nas should perhaps be cached for better performance */
379
380 for (j = 0; j < nas->n_cnt; j++) {
381 addr = &(nas->n_addrs[j]);
382 client = _clnt_tli_create_timed(RPC_ANYFD, nconf, addr, RPCBPROG,
383 RPCBVERS4, 0, 0, tp);
384 if (client)
385 break;
386 }
387
388 if (client) {
389 tmpaddr = targaddr ? taddr2uaddr(nconf, addr) : NULL;
390 add_cache(host, nconf->nc_netid, addr, tmpaddr);
391 if (targaddr) {
392 *targaddr = tmpaddr;
393 }
394 }
395 netdir_free((char *)nas, ND_ADDRLIST);
396 return (client);
397 }
398
399 /*
400 * This routine will return a client handle that is connected to the local
401 * rpcbind. Returns NULL on error.
402 */
403 static CLIENT *
404 local_rpcb(void)
405 {
406 static struct netconfig *loopnconf;
407 static char hostname[MAXHOSTNAMELEN + 1];
408 extern mutex_t loopnconf_lock;
409
410 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
411 (void) mutex_lock(&loopnconf_lock);
412 if (loopnconf == NULL) {
413 struct netconfig *nconf, *tmpnconf = NULL;
414 void *nc_handle;
415
416 if ((hostname[0] == '\0') && (gethostname(hostname,
417 sizeof (hostname)) < 0)) {
418 syslog(LOG_ERR, "local_rpcb: gethostname failed.");
419 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
420 (void) mutex_unlock(&loopnconf_lock);
421 return (NULL);
422 }
423 nc_handle = setnetconfig();
424 if (nc_handle == NULL) {
425 /* fails to open netconfig file */
426 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
427 (void) mutex_unlock(&loopnconf_lock);
428 return (NULL);
429 }
430 while (nconf = getnetconfig(nc_handle)) {
431 if (strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
432 tmpnconf = nconf;
433 if (nconf->nc_semantics == NC_TPI_CLTS)
434 break;
435 }
436 }
437 if (tmpnconf == NULL) {
438 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
439 (void) mutex_unlock(&loopnconf_lock);
440 return (NULL);
441 }
442 loopnconf = getnetconfigent(tmpnconf->nc_netid);
534 return (rslt);
535 }
536
537 /*
538 * From the merged list, find the appropriate entry
539 */
540 static struct netbuf *
541 got_entry(rpcb_entry_list_ptr relp, struct netconfig *nconf)
542 {
543 struct netbuf *na = NULL;
544 rpcb_entry_list_ptr sp;
545 rpcb_entry *rmap;
546
547 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
548 rmap = &sp->rpcb_entry_map;
549 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
550 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
551 (nconf->nc_semantics == rmap->r_nc_semantics) &&
552 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != NULL)) {
553 na = uaddr2taddr(nconf, rmap->r_maddr);
554 break;
555 }
556 }
557 return (na);
558 }
559
560 /*
561 * Quick check to see if rpcbind is up. Tries to connect over
562 * local transport.
563 */
564 bool_t
565 __rpcbind_is_up(void)
566 {
567 char hostname[MAXHOSTNAMELEN + 1];
568 char uaddr[SYS_NMLN];
569 struct netbuf *addr;
570 int fd;
571 struct t_call *sndcall;
572 struct netconfig *netconf;
573 bool_t res;
574
575 if (gethostname(hostname, sizeof (hostname)) < 0)
576 return (TRUE);
577
578 if ((fd = t_open("/dev/ticotsord", O_RDWR, NULL)) == -1)
579 return (TRUE);
580
581 if (t_bind(fd, NULL, NULL) == -1) {
582 (void) t_close(fd);
583 return (TRUE);
584 }
585
586 /* LINTED pointer cast */
587 if ((sndcall = (struct t_call *)t_alloc(fd, T_CALL, 0)) == NULL) {
588 (void) t_close(fd);
589 return (TRUE);
590 }
591
592 uaddr[0] = '\0';
593 (void) strlcpy(uaddr, hostname, sizeof (uaddr) - 5);
594 (void) strcat(uaddr, ".rpc");
595 if ((netconf = getnetconfigent("ticotsord")) == NULL) {
596 (void) t_free((char *)sndcall, T_CALL);
597 (void) t_close(fd);
598 return (FALSE);
599 }
600 addr = uaddr2taddr(netconf, uaddr);
601 freenetconfigent(netconf);
602 if (addr == NULL || addr->buf == NULL) {
603 if (addr)
604 free(addr);
605 (void) t_free((char *)sndcall, T_CALL);
606 (void) t_close(fd);
607 return (FALSE);
608 }
609 sndcall->addr.maxlen = addr->maxlen;
610 sndcall->addr.len = addr->len;
611 sndcall->addr.buf = addr->buf;
612
613 if (t_connect(fd, sndcall, NULL) == -1)
614 res = FALSE;
615 else
616 res = TRUE;
617
618 sndcall->addr.maxlen = sndcall->addr.len = 0;
619 sndcall->addr.buf = NULL;
620 (void) t_free((char *)sndcall, T_CALL);
621 free(addr->buf);
622 free(addr);
623 (void) t_close(fd);
624
625 return (res);
626 }
627
628
629 /*
630 * An internal function which optimizes rpcb_getaddr function. It returns
631 * the universal address of the remote service or NULL. It also optionally
632 * returns the client handle that it uses to contact the remote rpcbind.
633 * The caller will re-purpose the client handle to contact the remote service.
634 *
635 * The algorithm used: First try version 4. Then try version 3 (svr4).
636 * Finally, if the transport is TCP or UDP, try version 2 (portmap).
637 * Version 4 is now available with all current systems on the network.
638 * With this algorithm, we get performance as well as a plan for
639 * obsoleting version 2.
640 *
641 * XXX: Due to some problems with t_connect(), we do not reuse the same client
642 * handle for COTS cases and hence in these cases we do not return the
643 * client handle. This code will change if t_connect() ever
644 * starts working properly. Also look under clnt_vc.c.
645 */
646 struct netbuf *
647 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
648 struct netconfig *nconf, char *host, CLIENT **clpp, struct timeval *tp)
649 {
650 static bool_t check_rpcbind = TRUE;
651 CLIENT *client = NULL;
652 RPCB parms;
653 enum clnt_stat clnt_st;
654 char *ua = NULL;
655 uint_t vers;
656 struct netbuf *address = NULL;
657 void *handle;
658 rpcb_entry_list_ptr relp = NULL;
659 bool_t tmp_client = FALSE;
660
661 /* parameter checking */
662 if (nconf == NULL) {
663 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
664 /*
665 * Setting rpc_createerr.cf_stat is sufficient.
666 * No details in rpc_createerr.cf_error needed.
667 */
668 return (NULL);
669 }
670
671 parms.r_addr = NULL;
672
673 /*
674 * Use default total timeout if no timeout is specified.
675 */
676 if (tp == NULL)
677 tp = &tottimeout;
678
679 /*
680 * Check if rpcbind is up. This prevents needless delays when
681 * accessing applications such as the keyserver while booting
682 * disklessly.
683 */
684 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
685 if (!__rpcbind_is_up()) {
686 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
687 rpc_createerr.cf_error.re_errno = 0;
688 rpc_createerr.cf_error.re_terrno = 0;
689 goto error;
690 }
691 check_rpcbind = FALSE;
692 }
693
694 /*
695 * First try version 4.
696 */
697 parms.r_prog = program;
698 parms.r_vers = version;
699 parms.r_owner = (char *)&nullstring[0]; /* not needed; */
700 /* just for xdring */
701 parms.r_netid = nconf->nc_netid; /* not really needed */
702
703 /*
704 * If a COTS transport is being used, try getting address via CLTS
705 * transport. This works only with version 4.
706 */
707 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
708 nconf->nc_semantics == NC_TPI_COTS) {
709 tmp_client = TRUE;
710 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
711 struct netconfig *nconf_clts;
712
713 while ((nconf_clts = __rpc_getconf(handle)) != NULL) {
714 if (strcmp(nconf_clts->nc_protofmly,
715 nconf->nc_protofmly) != 0) {
716 continue;
717 }
718 /*
719 * Sets rpc_createerr.cf_error members
720 * on failure
721 */
722 client = _getclnthandle_timed(host, nconf_clts,
723 &parms.r_addr, tp);
724 break;
725 }
726 __rpc_endconf(handle);
727 }
728 } else {
729 /* Sets rpc_createerr.cf_error members on failure */
730 client = _getclnthandle_timed(host, nconf, &parms.r_addr, tp);
731 }
732
733 if (client != NULL) {
734
735 /* Set rpcbind version 4 */
736 vers = RPCBVERS4;
737 CLNT_CONTROL(client, CLSET_VERS, (char *)&vers);
738
739 /*
740 * We also send the remote system the address we used to
741 * contact it in case it can help it connect back with us
742 */
743 if (parms.r_addr == NULL) {
744 parms.r_addr = strdup(""); /* for XDRing */
745 if (parms.r_addr == NULL) {
746 syslog(LOG_ERR, "__rpcb_findaddr_timed: "
747 "strdup failed.");
748 /* Construct a system error */
749 rpc_createerr.cf_error.re_errno = errno;
750 rpc_createerr.cf_error.re_terrno = 0;
751 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
752 goto error;
753 }
754 }
755
756 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT,
757 (char *)&rpcbrmttime);
758
759 /* Sets error structure members in client handle */
760 clnt_st = CLNT_CALL(client, RPCBPROC_GETADDRLIST,
761 (xdrproc_t)xdr_rpcb, (char *)&parms,
762 (xdrproc_t)xdr_rpcb_entry_list_ptr, (char *)&relp, *tp);
763
764 switch (clnt_st) {
765 case RPC_SUCCESS: /* Call succeeded */
766 address = got_entry(relp, nconf);
767 xdr_free((xdrproc_t)xdr_rpcb_entry_list_ptr,
768 (char *)&relp);
769 if (address != NULL) {
770 /* Program number and version number matched */
771 goto done;
772 }
773 /* Program and version not found for this transport */
774 /*
775 * XXX: should have returned with RPC_PROGUNAVAIL
776 * or perhaps RPC_PROGNOTREGISTERED error but
777 * since the remote machine might not always be able
778 * to send the address on all transports, we try the
779 * regular way with version 3, then 2
780 */
781 /* Try the next version */
782 break;
783 case RPC_PROGVERSMISMATCH: /* RPC protocol mismatch */
784 clnt_geterr(client, &rpc_createerr.cf_error);
785 if (rpc_createerr.cf_error.re_vers.low > vers) {
786 rpc_createerr.cf_stat = clnt_st;
787 goto error; /* a new version, can't handle */
788 }
789 /* Try the next version */
790 break;
791 case RPC_PROCUNAVAIL: /* Procedure unavailable */
792 case RPC_PROGUNAVAIL: /* Program not available */
793 case RPC_TIMEDOUT: /* Call timed out */
794 /* Try the next version */
795 break;
796 default:
797 clnt_geterr(client, &rpc_createerr.cf_error);
798 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
799 goto error;
800 break;
801 }
802
803 } else {
804
805 /* No client */
806 tmp_client = FALSE;
807
808 } /* End of version 4 */
809
810 /* Destroy a temporary client */
811 if (client != NULL && tmp_client) {
812 CLNT_DESTROY(client);
813 client = NULL;
814 free(parms.r_addr);
815 parms.r_addr = NULL;
816 }
817 tmp_client = FALSE;
818
819 /*
820 * Try version 3
821 */
822
823 /* Now the same transport is to be used to get the address */
824 if (client == NULL) {
825 /* Sets rpc_createerr.cf_error members on failure */
826 client = _getclnthandle_timed(host, nconf, &parms.r_addr, tp);
827 }
828 address = NULL;
829 if (client != NULL) {
830 if (parms.r_addr == NULL) {
831 parms.r_addr = strdup(""); /* for XDRing */
832 if (parms.r_addr == NULL) {
833 syslog(LOG_ERR, "__rpcb_findaddr_timed: "
834 "strdup failed.");
835 /* Construct a system error */
836 rpc_createerr.cf_error.re_errno = errno;
837 rpc_createerr.cf_error.re_terrno = 0;
838 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
839 goto error;
840 }
841 }
842
843 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT,
844 (char *)&rpcbrmttime);
845 vers = RPCBVERS; /* Set the version */
846 CLNT_CONTROL(client, CLSET_VERS, (char *)&vers);
847
848 /* Sets error structure members in client handle */
849 clnt_st = CLNT_CALL(client, RPCBPROC_GETADDR,
850 (xdrproc_t)xdr_rpcb, (char *)&parms,
851 (xdrproc_t)xdr_wrapstring, (char *)&ua, *tp);
852
853 switch (clnt_st) {
854 case RPC_SUCCESS: /* Call succeeded */
855 if (ua != NULL) {
856 if (ua[0] != '\0') {
857 address = uaddr2taddr(nconf, ua);
858 }
859 xdr_free((xdrproc_t)xdr_wrapstring,
860 (char *)&ua);
861
862 if (address != NULL) {
863 goto done;
864 }
865 /* NULL universal address */
866 /* But client call was successful */
867 clnt_geterr(client, &rpc_createerr.cf_error);
868 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
869 goto error;
870 }
871 #ifndef PORTMAP
872 clnt_geterr(client, &rpc_createerr.cf_error);
873 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
874 goto error;
875 #endif
876 /* Try the next version */
877 break;
878 case RPC_PROGVERSMISMATCH: /* RPC protocol mismatch */
879 clnt_geterr(client, &rpc_createerr.cf_error);
880 #ifdef PORTMAP
881 if (rpc_createerr.cf_error.re_vers.low > vers) {
882 rpc_createerr.cf_stat = clnt_st;
883 goto error; /* a new version, can't handle */
884 }
885 #else
886 rpc_createerr.cf_stat = clnt_st;
887 goto error;
888 #endif
889 /* Try the next version */
890 break;
891 #ifdef PORTMAP
892 case RPC_PROCUNAVAIL: /* Procedure unavailable */
893 case RPC_PROGUNAVAIL: /* Program not available */
894 case RPC_TIMEDOUT: /* Call timed out */
895 /* Try the next version */
896 break;
897 #endif
898 default:
899 clnt_geterr(client, &rpc_createerr.cf_error);
900 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
901 goto error;
902 break;
903 }
904 } /* End of version 3 */
905 #ifndef PORTMAP
906 /* cf_error members set by creation failure */
907 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
908 #endif
909 /*
910 * Try version 2
911 */
912
913 #ifdef PORTMAP
914 /* Try version 2 for TCP or UDP */
915 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
916 ushort_t port = 0;
917 struct netbuf remote;
918 uint_t pmapvers = 2;
919 struct pmap pmapparms;
920
921 /*
922 * Try UDP only - there are some portmappers out
923 * there that use UDP only.
924 */
925 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
926 struct netconfig *newnconf;
927
928 if (client != NULL) {
929 CLNT_DESTROY(client);
930 client = NULL;
931 free(parms.r_addr);
932 parms.r_addr = NULL;
933 }
934 if ((handle = __rpc_setconf("udp")) == NULL) {
935 /* Construct an unknown protocol error */
936 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
937 goto error;
938 }
939
940 /*
941 * The following to reinforce that you can
942 * only request for remote address through
943 * the same transport you are requesting.
944 * ie. requesting unversial address
945 * of IPv4 has to be carried through IPv4.
946 * Can't use IPv6 to send out the request.
947 * The mergeaddr in rpcbind can't handle
948 * this.
949 */
950 for (;;) {
951 if ((newnconf = __rpc_getconf(handle))
952 == NULL) {
953 __rpc_endconf(handle);
954 /*
955 * Construct an unknown protocol
956 * error
957 */
958 rpc_createerr.cf_stat =
959 RPC_UNKNOWNPROTO;
960 goto error;
961 }
962 /*
963 * here check the protocol family to
964 * be consistent with the request one
965 */
966 if (strcmp(newnconf->nc_protofmly,
967 nconf->nc_protofmly) == 0)
968 break;
969 }
970
971 /* Sets rpc_createerr.cf_error members on failure */
972 client = _getclnthandle_timed(host, newnconf,
973 &parms.r_addr, tp);
974 __rpc_endconf(handle);
975 tmp_client = TRUE;
976 }
977 if (client == NULL) {
978 /*
979 * rpc_createerr. cf_error members were set by
980 * creation failure
981 */
982 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
983 tmp_client = FALSE;
984 goto error;
985 }
986
987 /*
988 * Set version and retry timeout.
989 */
990 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
991 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
992
993 pmapparms.pm_prog = program;
994 pmapparms.pm_vers = version;
995 pmapparms.pm_prot = (strcmp(nconf->nc_proto, NC_TCP) != 0) ?
996 IPPROTO_UDP : IPPROTO_TCP;
997 pmapparms.pm_port = 0; /* not needed */
998
999 /* Sets error structure members in client handle */
1000 clnt_st = CLNT_CALL(client, PMAPPROC_GETPORT,
1001 (xdrproc_t)xdr_pmap, (caddr_t)&pmapparms,
1002 (xdrproc_t)xdr_u_short, (caddr_t)&port, *tp);
1003
1004 if (clnt_st != RPC_SUCCESS) {
1005 clnt_geterr(client, &rpc_createerr.cf_error);
1006 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1007 goto error;
1008 } else if (port == 0) {
1009 /* Will be NULL universal address */
1010 /* But client call was successful */
1011 clnt_geterr(client, &rpc_createerr.cf_error);
1012 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
1013 goto error;
1014 }
1015 port = htons(port);
1016 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
1017 if (((address = malloc(sizeof (struct netbuf))) == NULL) ||
1018 ((address->buf = malloc(remote.len)) == NULL)) {
1019 /* Construct a system error */
1020 rpc_createerr.cf_error.re_errno = errno;
1021 rpc_createerr.cf_error.re_terrno = 0;
1022 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
1023 free(address);
1024 address = NULL;
1025 goto error;
1026 }
1027 (void) memcpy(address->buf, remote.buf, remote.len);
1028 (void) memcpy(&address->buf[sizeof (short)], &port,
1029 sizeof (short));
1030 address->len = address->maxlen = remote.len;
1031 goto done;
1032 } else {
1033 /*
1034 * This is not NC_INET.
1035 * Always an error for version 2.
1036 */
1037 if (client != NULL && clnt_st != RPC_SUCCESS) {
1038 /* There is a client that failed */
1039 clnt_geterr(client, &rpc_createerr.cf_error);
1040 rpc_createerr.cf_stat = clnt_st;
1041 } else {
1042 /* Something else */
1043 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1044 /*
1045 * Setting rpc_createerr.cf_stat is sufficient.
1046 * No details in rpc_createerr.cf_error needed.
1047 */
1048 }
1049 }
1050 #endif
1051
1052 error:
1053 /* Return NULL address and NULL client */
1054 address = NULL;
1055 if (client != NULL) {
1056 CLNT_DESTROY(client);
1057 client = NULL;
1058 }
1059
1060 done:
1061 /* Return an address and optional client */
1062 if (client != NULL && tmp_client) {
1063 /* This client is the temporary one */
1064 CLNT_DESTROY(client);
1065 client = NULL;
1066 }
1067 if (clpp != NULL) {
1068 *clpp = client;
1069 } else if (client != NULL) {
1070 CLNT_DESTROY(client);
1071 }
1072 free(parms.r_addr);
1073 return (address);
1074 }
1075
1076
1077 /*
1078 * Find the mapped address for program, version.
1079 * Calls the rpcbind service remotely to do the lookup.
1080 * Uses the transport specified in nconf.
1081 * Returns FALSE (0) if no map exists, else returns 1.
1082 *
1083 * Assuming that the address is all properly allocated
1084 */
1085 int
1086 rpcb_getaddr(const rpcprog_t program, const rpcvers_t version,
1087 const struct netconfig *nconf, struct netbuf *address, const char *host)
1088 {
1089 struct netbuf *na;
1090
1091 if ((na = __rpcb_findaddr_timed(program, version,
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