1 /* $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $ */
4 * The contents of this file are subject to the Sun Standards
5 * License Version 1.0 the (the "License";) You may not use
6 * this file except in compliance with the License. You may
7 * obtain a copy of the License at lib/libc/rpc/LICENSE
9 * Software distributed under the License is distributed on
10 * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
11 * express or implied. See the License for the specific
12 * language governing rights and limitations under the License.
14 * The Original Code is Copyright 1998 by Sun Microsystems, Inc
16 * The Initial Developer of the Original Code is: Sun
19 * All Rights Reserved.
21 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
22 * unrestricted use provided that this legend is included on all tape
23 * media and as a part of the software program in whole or part. Users
24 * may copy or modify Sun RPC without charge, but are not authorized
25 * to license or distribute it to anyone else except as part of a product or
26 * program developed by the user.
28 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
29 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
32 * Sun RPC is provided with no support and without any obligation on the
33 * part of Sun Microsystems, Inc. to assist in its use, correction,
34 * modification or enhancement.
36 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
37 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
38 * OR ANY PART THEREOF.
40 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
41 * or profits or other special, indirect and consequential damages, even if
42 * Sun has been advised of the possibility of such damages.
44 * Sun Microsystems, Inc.
46 * Mountain View, California 94043
49 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
52 /* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */
55 #if defined(LIBC_SCCS) && !defined(lint)
56 static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
58 #include <sys/cdefs.h>
59 __FBSDID("$FreeBSD$");
63 * interface to rpcbind rpc service.
65 * Copyright (C) 1988, Sun Microsystems, Inc.
68 #include "namespace.h"
69 #include "reentrant.h"
70 #include <sys/types.h>
71 #include <sys/socket.h>
73 #include <sys/utsname.h>
75 #include <rpc/rpcb_prot.h>
76 #include <rpc/nettype.h>
77 #include <netconfig.h>
79 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
80 #include <rpc/pmap_prot.h>
89 #include "un-namespace.h"
93 static struct timeval tottimeout = { 60, 0 };
94 static const struct timeval rmttimeout = { 3, 0 };
95 static struct timeval rpcbrmttime = { 15, 0 };
97 extern bool_t xdr_wrapstring(XDR *, char **);
99 static const char nullstring[] = "\000";
103 struct address_cache {
107 struct netbuf *ac_taddr;
108 struct address_cache *ac_next;
111 static struct address_cache *front;
112 static int cachesize;
114 #define CLCR_GET_RPCB_TIMEOUT 1
115 #define CLCR_SET_RPCB_TIMEOUT 2
118 extern int __rpc_lowvers;
120 static struct address_cache *check_cache(const char *, const char *);
121 static void delete_cache(struct netbuf *);
122 static void add_cache(const char *, const char *, struct netbuf *, char *);
123 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
124 static CLIENT *local_rpcb(void);
125 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
128 * This routine adjusts the timeout used for calls to the remote rpcbind.
129 * Also, this routine can be used to set the use of portmapper version 2
130 * only when doing rpc_broadcasts
131 * These are private routines that may not be provided in future releases.
134 __rpc_control(request, info)
139 case CLCR_GET_RPCB_TIMEOUT:
140 *(struct timeval *)info = tottimeout;
142 case CLCR_SET_RPCB_TIMEOUT:
143 tottimeout = *(struct timeval *)info;
145 case CLCR_SET_LOWVERS:
146 __rpc_lowvers = *(int *)info;
148 case CLCR_GET_LOWVERS:
149 *(int *)info = __rpc_lowvers;
158 * It might seem that a reader/writer lock would be more reasonable here.
159 * However because getclnthandle(), the only user of the cache functions,
160 * may do a delete_cache() operation if a check_cache() fails to return an
161 * address useful to clnt_tli_create(), we may as well use a mutex.
164 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
165 * block all clnt_create's if we are trying to connect to a host that's down,
166 * since the lock will be held all during that time.
168 extern rwlock_t rpcbaddr_cache_lock;
171 * The routines check_cache(), add_cache(), delete_cache() manage the
172 * cache of rpcbind addresses for (host, netid).
175 static struct address_cache *
176 check_cache(host, netid)
177 const char *host, *netid;
179 struct address_cache *cptr;
181 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
183 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
184 if (!strcmp(cptr->ac_host, host) &&
185 !strcmp(cptr->ac_netid, netid)) {
187 fprintf(stderr, "Found cache entry for %s: %s\n",
193 return ((struct address_cache *) NULL);
200 struct address_cache *cptr, *prevptr = NULL;
202 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
203 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
204 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
206 free(cptr->ac_netid);
207 free(cptr->ac_taddr->buf);
208 free(cptr->ac_taddr);
210 free(cptr->ac_uaddr);
212 prevptr->ac_next = cptr->ac_next;
214 front = cptr->ac_next;
224 add_cache(host, netid, taddr, uaddr)
225 const char *host, *netid;
227 struct netbuf *taddr;
229 struct address_cache *ad_cache, *cptr, *prevptr;
231 ad_cache = (struct address_cache *)
232 malloc(sizeof (struct address_cache));
236 ad_cache->ac_host = strdup(host);
237 ad_cache->ac_netid = strdup(netid);
238 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
239 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
240 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
241 (uaddr && !ad_cache->ac_uaddr)) {
244 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
245 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
246 if (ad_cache->ac_taddr->buf == NULL) {
249 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
251 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
254 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
256 rwlock_wrlock(&rpcbaddr_cache_lock);
257 if (cachesize < CACHESIZE) {
258 ad_cache->ac_next = front;
262 /* Free the last entry */
265 while (cptr->ac_next) {
267 cptr = cptr->ac_next;
271 fprintf(stderr, "Deleted from cache: %s : %s\n",
272 cptr->ac_host, cptr->ac_netid);
275 free(cptr->ac_netid);
276 free(cptr->ac_taddr->buf);
277 free(cptr->ac_taddr);
279 free(cptr->ac_uaddr);
282 prevptr->ac_next = NULL;
283 ad_cache->ac_next = front;
287 ad_cache->ac_next = NULL;
291 rwlock_unlock(&rpcbaddr_cache_lock);
295 * This routine will return a client handle that is connected to the
296 * rpcbind. If targaddr is non-NULL, the "universal address" of the
297 * host will be stored in *targaddr; the caller is responsible for
298 * freeing this string.
299 * On error, returns NULL and free's everything.
302 getclnthandle(host, nconf, targaddr)
304 const struct netconfig *nconf;
308 struct netbuf *addr, taddr;
309 struct netbuf addr_to_delete;
310 struct __rpc_sockinfo si;
311 struct addrinfo hints, *res, *tres;
312 struct address_cache *ad_cache;
315 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
317 /* Get the address of the rpcbind. Check cache first */
319 addr_to_delete.len = 0;
320 rwlock_rdlock(&rpcbaddr_cache_lock);
323 ad_cache = check_cache(host, nconf->nc_netid);
324 if (ad_cache != NULL) {
325 addr = ad_cache->ac_taddr;
326 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
327 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
328 if (client != NULL) {
330 *targaddr = strdup(ad_cache->ac_uaddr);
331 rwlock_unlock(&rpcbaddr_cache_lock);
334 addr_to_delete.len = addr->len;
335 addr_to_delete.buf = (char *)malloc(addr->len);
336 if (addr_to_delete.buf == NULL) {
337 addr_to_delete.len = 0;
339 memcpy(addr_to_delete.buf, addr->buf, addr->len);
342 rwlock_unlock(&rpcbaddr_cache_lock);
343 if (addr_to_delete.len != 0) {
345 * Assume this may be due to cache data being
348 rwlock_wrlock(&rpcbaddr_cache_lock);
349 delete_cache(&addr_to_delete);
350 rwlock_unlock(&rpcbaddr_cache_lock);
351 free(addr_to_delete.buf);
353 if (!__rpc_nconf2sockinfo(nconf, &si)) {
354 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
358 memset(&hints, 0, sizeof hints);
359 hints.ai_family = si.si_af;
360 hints.ai_socktype = si.si_socktype;
361 hints.ai_protocol = si.si_proto;
364 printf("trying netid %s family %d proto %d socktype %d\n",
365 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
368 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
369 client = local_rpcb();
372 clnt_pcreateerror("rpcbind clnt interface");
376 struct sockaddr_un sun;
378 *targaddr = malloc(sizeof(sun.sun_path));
379 strncpy(*targaddr, _PATH_RPCBINDSOCK,
380 sizeof(sun.sun_path));
384 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
385 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
390 for (tres = res; tres != NULL; tres = tres->ai_next) {
391 taddr.buf = tres->ai_addr;
392 taddr.len = taddr.maxlen = tres->ai_addrlen;
398 ua = taddr2uaddr(nconf, &taddr);
399 fprintf(stderr, "Got it [%s]\n", ua);
408 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
409 taddr.len, taddr.maxlen);
410 fprintf(stderr, "\tAddress is ");
411 for (i = 0; i < taddr.len; i++)
412 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
413 fprintf(stderr, "\n");
416 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
417 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
420 clnt_pcreateerror("rpcbind clnt interface");
425 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
426 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
438 #define IN4_LOCALHOST_STRING "127.0.0.1"
439 #define IN6_LOCALHOST_STRING "::1"
442 * This routine will return a client handle that is connected to the local
443 * rpcbind. Returns NULL on error and free's everything.
449 static struct netconfig *loopnconf;
450 static char *hostname;
451 extern mutex_t loopnconf_lock;
455 struct sockaddr_un sun;
458 * Try connecting to the local rpcbind through a local socket
459 * first. If this doesn't work, try all transports defined in
460 * the netconfig file.
462 memset(&sun, 0, sizeof sun);
463 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
466 sun.sun_family = AF_LOCAL;
467 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
468 nbuf.len = sun.sun_len = SUN_LEN(&sun);
469 nbuf.maxlen = sizeof (struct sockaddr_un);
472 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
473 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
474 (rpcvers_t)RPCBVERS, tsize, tsize);
476 if (client != NULL) {
477 /* Mark the socket to be closed in destructor */
478 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
482 /* Nobody needs this socket anymore; free the descriptor. */
487 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
488 mutex_lock(&loopnconf_lock);
489 if (loopnconf == NULL) {
490 struct netconfig *nconf, *tmpnconf = NULL;
494 nc_handle = setnetconfig();
495 if (nc_handle == NULL) {
496 /* fails to open netconfig file */
497 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
498 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
499 mutex_unlock(&loopnconf_lock);
502 while ((nconf = getnetconfig(nc_handle)) != NULL) {
504 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
508 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
509 (nconf->nc_semantics == NC_TPI_COTS ||
510 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
511 fd = __rpc_nconf2fd(nconf);
513 * Can't create a socket, assume that
514 * this family isn't configured in the kernel.
520 if (!strcmp(nconf->nc_protofmly, NC_INET))
521 hostname = IN4_LOCALHOST_STRING;
523 hostname = IN6_LOCALHOST_STRING;
526 if (tmpnconf == NULL) {
527 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
528 mutex_unlock(&loopnconf_lock);
531 loopnconf = getnetconfigent(tmpnconf->nc_netid);
532 /* loopnconf is never freed */
533 endnetconfig(nc_handle);
535 mutex_unlock(&loopnconf_lock);
536 client = getclnthandle(hostname, loopnconf, NULL);
541 * Set a mapping between program, version and address.
542 * Calls the rpcbind service to do the mapping.
545 rpcb_set(program, version, nconf, address)
548 const struct netconfig *nconf; /* Network structure of transport */
549 const struct netbuf *address; /* Services netconfig address */
556 /* parameter checking */
558 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
561 if (address == NULL) {
562 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
565 client = local_rpcb();
570 /* convert to universal */
571 /*LINTED const castaway*/
572 parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
573 (struct netbuf *)address);
575 CLNT_DESTROY(client);
576 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
577 return (FALSE); /* no universal address */
579 parms.r_prog = program;
580 parms.r_vers = version;
581 parms.r_netid = nconf->nc_netid;
583 * Though uid is not being used directly, we still send it for
584 * completeness. For non-unix platforms, perhaps some other
585 * string or an empty string can be sent.
587 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
588 parms.r_owner = uidbuf;
590 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
591 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
592 (char *)(void *)&rslt, tottimeout);
594 CLNT_DESTROY(client);
600 * Remove the mapping between program, version and netbuf address.
601 * Calls the rpcbind service to do the un-mapping.
602 * If netbuf is NULL, unset for all the transports, otherwise unset
603 * only for the given transport.
606 rpcb_unset(program, version, nconf)
609 const struct netconfig *nconf;
616 client = local_rpcb();
621 parms.r_prog = program;
622 parms.r_vers = version;
624 parms.r_netid = nconf->nc_netid;
626 /*LINTED const castaway*/
627 parms.r_netid = (char *) &nullstring[0]; /* unsets all */
629 /*LINTED const castaway*/
630 parms.r_addr = (char *) &nullstring[0];
631 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
632 parms.r_owner = uidbuf;
634 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
635 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
636 (char *)(void *)&rslt, tottimeout);
638 CLNT_DESTROY(client);
643 * From the merged list, find the appropriate entry
645 static struct netbuf *
646 got_entry(relp, nconf)
647 rpcb_entry_list_ptr relp;
648 const struct netconfig *nconf;
650 struct netbuf *na = NULL;
651 rpcb_entry_list_ptr sp;
654 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
655 rmap = &sp->rpcb_entry_map;
656 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
657 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
658 (nconf->nc_semantics == rmap->r_nc_semantics) &&
659 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
660 na = uaddr2taddr(nconf, rmap->r_maddr);
662 fprintf(stderr, "\tRemote address is [%s].\n",
666 "\tCouldn't resolve remote address!\n");
675 * Quick check to see if rpcbind is up. Tries to connect over
681 struct netconfig *nconf;
682 struct sockaddr_un sun;
687 localhandle = setnetconfig();
688 while ((nconf = getnetconfig(localhandle)) != NULL) {
689 if (nconf->nc_protofmly != NULL &&
690 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
696 endnetconfig(localhandle);
698 memset(&sun, 0, sizeof sun);
699 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
702 sun.sun_family = AF_LOCAL;
703 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
704 sun.sun_len = SUN_LEN(&sun);
706 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
716 * An internal function which optimizes rpcb_getaddr function. It also
717 * returns the client handle that it uses to contact the remote rpcbind.
719 * The algorithm used: If the transports is TCP or UDP, it first tries
720 * version 2 (portmap), 4 and then 3 (svr4). This order should be
721 * changed in the next OS release to 4, 2 and 3. We are assuming that by
722 * that time, version 4 would be available on many machines on the network.
723 * With this algorithm, we get performance as well as a plan for
724 * obsoleting version 2.
726 * For all other transports, the algorithm remains as 4 and then 3.
728 * XXX: Due to some problems with t_connect(), we do not reuse the same client
729 * handle for COTS cases and hence in these cases we do not return the
730 * client handle. This code will change if t_connect() ever
731 * starts working properly. Also look under clnt_vc.c.
734 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
737 const struct netconfig *nconf;
742 static bool_t check_rpcbind = TRUE;
743 CLIENT *client = NULL;
745 enum clnt_stat clnt_st;
748 struct netbuf *address = NULL;
749 rpcvers_t start_vers = RPCBVERS4;
750 struct netbuf servaddr;
752 /* parameter checking */
754 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
761 * Use default total timeout if no timeout is specified.
767 /* Try version 2 for TCP or UDP */
768 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
770 struct netbuf remote;
771 rpcvers_t pmapvers = 2;
772 struct pmap pmapparms;
775 * Try UDP only - there are some portmappers out
776 * there that use UDP only.
778 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
779 struct netconfig *newnconf;
781 if ((newnconf = getnetconfigent("udp")) == NULL) {
782 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
785 client = getclnthandle(host, newnconf, &parms.r_addr);
786 freenetconfigent(newnconf);
788 client = getclnthandle(host, nconf, &parms.r_addr);
794 * Set version and retry timeout.
796 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
797 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
799 pmapparms.pm_prog = program;
800 pmapparms.pm_vers = version;
801 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
802 IPPROTO_UDP : IPPROTO_TCP;
803 pmapparms.pm_port = 0; /* not needed */
804 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
805 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
806 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
808 if (clnt_st != RPC_SUCCESS) {
809 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
810 (clnt_st == RPC_PROGUNAVAIL))
811 goto try_rpcbind; /* Try different versions */
812 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
813 clnt_geterr(client, &rpc_createerr.cf_error);
815 } else if (port == 0) {
817 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
821 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
822 if (((address = (struct netbuf *)
823 malloc(sizeof (struct netbuf))) == NULL) ||
824 ((address->buf = (char *)
825 malloc(remote.len)) == NULL)) {
826 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
827 clnt_geterr(client, &rpc_createerr.cf_error);
834 memcpy(address->buf, remote.buf, remote.len);
835 memcpy(&((char *)address->buf)[sizeof (short)],
836 (char *)(void *)&port, sizeof (short));
837 address->len = address->maxlen = remote.len;
844 * Check if rpcbind is up. This prevents needless delays when
845 * accessing applications such as the keyserver while booting
848 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
849 if (!__rpcbind_is_up()) {
850 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
851 rpc_createerr.cf_error.re_errno = 0;
854 check_rpcbind = FALSE;
858 * Now we try version 4 and then 3.
859 * We also send the remote system the address we used to
860 * contact it in case it can help to connect back with us
862 parms.r_prog = program;
863 parms.r_vers = version;
864 /*LINTED const castaway*/
865 parms.r_owner = (char *) &nullstring[0]; /* not needed; */
866 /* just for xdring */
867 parms.r_netid = nconf->nc_netid; /* not really needed */
870 * If a COTS transport is being used, try getting address via CLTS
871 * transport. This works only with version 4.
873 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
874 nconf->nc_semantics == NC_TPI_COTS) {
877 struct netconfig *nconf_clts;
878 rpcb_entry_list_ptr relp = NULL;
880 if (client == NULL) {
881 /* This did not go through the above PORTMAP/TCP code */
882 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
883 while ((nconf_clts = __rpc_getconf(handle))
885 if (strcmp(nconf_clts->nc_protofmly,
886 nconf->nc_protofmly) != 0) {
889 client = getclnthandle(host, nconf_clts,
893 __rpc_endconf(handle);
896 goto regular_rpcbind; /* Go the regular way */
898 /* This is a UDP PORTMAP handle. Change to version 4 */
900 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
903 * We also send the remote system the address we used to
904 * contact it in case it can help it connect back with us
906 if (parms.r_addr == NULL) {
907 /*LINTED const castaway*/
908 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
911 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
913 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
914 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
915 (xdrproc_t) xdr_rpcb_entry_list_ptr,
916 (char *)(void *)&relp, *tp);
917 if (clnt_st == RPC_SUCCESS) {
918 if ((address = got_entry(relp, nconf)) != NULL) {
919 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
920 (char *)(void *)&relp);
921 CLNT_CONTROL(client, CLGET_SVC_ADDR,
922 (char *)(void *)&servaddr);
923 __rpc_fixup_addr(address, &servaddr);
926 /* Entry not found for this transport */
927 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
928 (char *)(void *)&relp);
930 * XXX: should have perhaps returned with error but
931 * since the remote machine might not always be able
932 * to send the address on all transports, we try the
933 * regular way with regular_rpcbind
935 goto regular_rpcbind;
936 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
937 (clnt_st == RPC_PROGUNAVAIL)) {
938 start_vers = RPCBVERS; /* Try version 3 now */
939 goto regular_rpcbind; /* Try different versions */
941 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
942 clnt_geterr(client, &rpc_createerr.cf_error);
949 /* Now the same transport is to be used to get the address */
950 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
951 (nconf->nc_semantics == NC_TPI_COTS))) {
952 /* A CLTS type of client - destroy it */
953 CLNT_DESTROY(client);
957 if (client == NULL) {
958 client = getclnthandle(host, nconf, &parms.r_addr);
959 if (client == NULL) {
963 if (parms.r_addr == NULL) {
964 /*LINTED const castaway*/
965 parms.r_addr = (char *) &nullstring[0];
968 /* First try from start_vers and then version 3 (RPCBVERS) */
970 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
971 for (vers = start_vers; vers >= RPCBVERS; vers--) {
972 /* Set the version */
973 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
974 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
975 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
976 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
977 if (clnt_st == RPC_SUCCESS) {
978 if ((ua == NULL) || (ua[0] == 0)) {
979 /* address unknown */
980 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
983 address = uaddr2taddr(nconf, ua);
985 fprintf(stderr, "\tRemote address is [%s]\n", ua);
988 "\tCouldn't resolve remote address!\n");
990 xdr_free((xdrproc_t)xdr_wrapstring,
991 (char *)(void *)&ua);
994 /* We don't know about your universal address */
995 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
998 CLNT_CONTROL(client, CLGET_SVC_ADDR,
999 (char *)(void *)&servaddr);
1000 __rpc_fixup_addr(address, &servaddr);
1002 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1003 struct rpc_err rpcerr;
1005 clnt_geterr(client, &rpcerr);
1006 if (rpcerr.re_vers.low > RPCBVERS4)
1007 goto error; /* a new version, can't handle */
1008 } else if (clnt_st != RPC_PROGUNAVAIL) {
1009 /* Cant handle this error */
1010 rpc_createerr.cf_stat = clnt_st;
1011 clnt_geterr(client, &rpc_createerr.cf_error);
1016 if ((address == NULL) || (address->len == 0)) {
1017 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
1018 clnt_geterr(client, &rpc_createerr.cf_error);
1023 CLNT_DESTROY(client);
1027 if (nconf->nc_semantics != NC_TPI_CLTS) {
1028 /* This client is the connectionless one */
1030 CLNT_DESTROY(client);
1036 } else if (client) {
1037 CLNT_DESTROY(client);
1039 if (parms.r_addr != NULL && parms.r_addr != nullstring)
1046 * Find the mapped address for program, version.
1047 * Calls the rpcbind service remotely to do the lookup.
1048 * Uses the transport specified in nconf.
1049 * Returns FALSE (0) if no map exists, else returns 1.
1051 * Assuming that the address is all properly allocated
1054 rpcb_getaddr(program, version, nconf, address, host)
1057 const struct netconfig *nconf;
1058 struct netbuf *address;
1063 if ((na = __rpcb_findaddr_timed(program, version,
1064 (struct netconfig *) nconf, (char *) host,
1065 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1068 if (na->len > address->maxlen) {
1069 /* Too long address */
1072 rpc_createerr.cf_stat = RPC_FAILED;
1075 memcpy(address->buf, na->buf, (size_t)na->len);
1076 address->len = na->len;
1083 * Get a copy of the current maps.
1084 * Calls the rpcbind service remotely to get the maps.
1086 * It returns only a list of the services
1087 * It returns NULL on failure.
1090 rpcb_getmaps(nconf, host)
1091 const struct netconfig *nconf;
1094 rpcblist_ptr head = NULL;
1096 enum clnt_stat clnt_st;
1099 client = getclnthandle(host, nconf, NULL);
1100 if (client == NULL) {
1103 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1104 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1105 (char *)(void *)&head, tottimeout);
1106 if (clnt_st == RPC_SUCCESS)
1109 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1110 (clnt_st != RPC_PROGUNAVAIL)) {
1111 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1112 clnt_geterr(client, &rpc_createerr.cf_error);
1116 /* fall back to earlier version */
1117 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1118 if (vers == RPCBVERS4) {
1120 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1121 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1122 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1123 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1126 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1127 clnt_geterr(client, &rpc_createerr.cf_error);
1130 CLNT_DESTROY(client);
1135 * rpcbinder remote-call-service interface.
1136 * This routine is used to call the rpcbind remote call service
1137 * which will look up a service program in the address maps, and then
1138 * remotely call that routine with the given parameters. This allows
1139 * programs to do a lookup and call in one step.
1142 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1143 xdrres, resp, tout, addr_ptr)
1144 const struct netconfig *nconf; /* Netconfig structure */
1145 const char *host; /* Remote host name */
1148 rpcproc_t proc; /* Remote proc identifiers */
1149 xdrproc_t xdrargs, xdrres; /* XDR routines */
1150 caddr_t argsp, resp; /* Argument and Result */
1151 struct timeval tout; /* Timeout value for this call */
1152 const struct netbuf *addr_ptr; /* Preallocated netbuf address */
1155 enum clnt_stat stat;
1156 struct r_rpcb_rmtcallargs a;
1157 struct r_rpcb_rmtcallres r;
1158 rpcvers_t rpcb_vers;
1161 client = getclnthandle(host, nconf, NULL);
1162 if (client == NULL) {
1163 return (RPC_FAILED);
1165 /*LINTED const castaway*/
1166 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1170 a.args.args_val = argsp;
1171 a.xdr_args = xdrargs;
1173 r.results.results_val = resp;
1176 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1177 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1178 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1179 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1180 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1181 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1183 /*LINTED const castaway*/
1184 na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1186 stat = RPC_N2AXLATEFAILURE;
1187 /*LINTED const castaway*/
1188 ((struct netbuf *) addr_ptr)->len = 0;
1191 if (na->len > addr_ptr->maxlen) {
1192 /* Too long address */
1193 stat = RPC_FAILED; /* XXX A better error no */
1196 /*LINTED const castaway*/
1197 ((struct netbuf *) addr_ptr)->len = 0;
1200 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1201 /*LINTED const castaway*/
1202 ((struct netbuf *)addr_ptr)->len = na->len;
1206 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1207 (stat != RPC_PROGUNAVAIL)) {
1212 CLNT_DESTROY(client);
1214 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1219 * Gets the time on the remote host.
1220 * Returns 1 if succeeds else 0.
1223 rpcb_gettime(host, timep)
1227 CLIENT *client = NULL;
1229 struct netconfig *nconf;
1234 if ((host == NULL) || (host[0] == 0)) {
1239 if ((handle = __rpc_setconf("netpath")) == NULL) {
1240 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1243 rpc_createerr.cf_stat = RPC_SUCCESS;
1244 while (client == NULL) {
1245 if ((nconf = __rpc_getconf(handle)) == NULL) {
1246 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1247 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1250 client = getclnthandle(host, nconf, NULL);
1254 __rpc_endconf(handle);
1255 if (client == (CLIENT *) NULL) {
1259 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1260 (xdrproc_t) xdr_void, NULL,
1261 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1263 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1264 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1265 if (vers == RPCBVERS4) {
1266 /* fall back to earlier version */
1268 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1269 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1270 (xdrproc_t) xdr_void, NULL,
1271 (xdrproc_t) xdr_int, (char *)(void *)timep,
1275 CLNT_DESTROY(client);
1276 return (st == RPC_SUCCESS? TRUE: FALSE);
1280 * Converts taddr to universal address. This routine should never
1281 * really be called because local n2a libraries are always provided.
1284 rpcb_taddr2uaddr(nconf, taddr)
1285 struct netconfig *nconf;
1286 struct netbuf *taddr;
1292 /* parameter checking */
1293 if (nconf == NULL) {
1294 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1297 if (taddr == NULL) {
1298 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1301 client = local_rpcb();
1306 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1307 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1308 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1309 CLNT_DESTROY(client);
1314 * Converts universal address to netbuf. This routine should never
1315 * really be called because local n2a libraries are always provided.
1318 rpcb_uaddr2taddr(nconf, uaddr)
1319 struct netconfig *nconf;
1323 struct netbuf *taddr;
1326 /* parameter checking */
1327 if (nconf == NULL) {
1328 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1331 if (uaddr == NULL) {
1332 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1335 client = local_rpcb();
1340 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1341 if (taddr == NULL) {
1342 CLNT_DESTROY(client);
1345 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1346 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1347 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1348 tottimeout) != RPC_SUCCESS) {
1352 CLNT_DESTROY(client);