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"
94 static struct timeval tottimeout = { 60, 0 };
95 static const struct timeval rmttimeout = { 3, 0 };
96 static struct timeval rpcbrmttime = { 15, 0 };
98 extern bool_t xdr_wrapstring(XDR *, char **);
100 static const char nullstring[] = "\000";
104 struct address_cache {
108 struct netbuf *ac_taddr;
109 struct address_cache *ac_next;
112 static struct address_cache *front;
113 static int cachesize;
115 #define CLCR_GET_RPCB_TIMEOUT 1
116 #define CLCR_SET_RPCB_TIMEOUT 2
119 extern int __rpc_lowvers;
121 static struct address_cache *check_cache(const char *, const char *);
122 static void delete_cache(struct netbuf *);
123 static void add_cache(const char *, const char *, struct netbuf *, char *);
124 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
125 static CLIENT *local_rpcb(void);
126 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
129 * This routine adjusts the timeout used for calls to the remote rpcbind.
130 * Also, this routine can be used to set the use of portmapper version 2
131 * only when doing rpc_broadcasts
132 * These are private routines that may not be provided in future releases.
135 __rpc_control(request, info)
140 case CLCR_GET_RPCB_TIMEOUT:
141 *(struct timeval *)info = tottimeout;
143 case CLCR_SET_RPCB_TIMEOUT:
144 tottimeout = *(struct timeval *)info;
146 case CLCR_SET_LOWVERS:
147 __rpc_lowvers = *(int *)info;
149 case CLCR_GET_LOWVERS:
150 *(int *)info = __rpc_lowvers;
159 * It might seem that a reader/writer lock would be more reasonable here.
160 * However because getclnthandle(), the only user of the cache functions,
161 * may do a delete_cache() operation if a check_cache() fails to return an
162 * address useful to clnt_tli_create(), we may as well use a mutex.
165 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
166 * block all clnt_create's if we are trying to connect to a host that's down,
167 * since the lock will be held all during that time.
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) {
248 if (ad_cache->ac_host)
249 free(ad_cache->ac_host);
250 if (ad_cache->ac_netid)
251 free(ad_cache->ac_netid);
252 if (ad_cache->ac_uaddr)
253 free(ad_cache->ac_uaddr);
254 if (ad_cache->ac_taddr)
255 free(ad_cache->ac_taddr);
259 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
261 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
264 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
266 rwlock_wrlock(&rpcbaddr_cache_lock);
267 if (cachesize < CACHESIZE) {
268 ad_cache->ac_next = front;
272 /* Free the last entry */
275 while (cptr->ac_next) {
277 cptr = cptr->ac_next;
281 fprintf(stderr, "Deleted from cache: %s : %s\n",
282 cptr->ac_host, cptr->ac_netid);
285 free(cptr->ac_netid);
286 free(cptr->ac_taddr->buf);
287 free(cptr->ac_taddr);
289 free(cptr->ac_uaddr);
292 prevptr->ac_next = NULL;
293 ad_cache->ac_next = front;
297 ad_cache->ac_next = NULL;
301 rwlock_unlock(&rpcbaddr_cache_lock);
305 * This routine will return a client handle that is connected to the
306 * rpcbind. If targaddr is non-NULL, the "universal address" of the
307 * host will be stored in *targaddr; the caller is responsible for
308 * freeing this string.
309 * On error, returns NULL and free's everything.
312 getclnthandle(host, nconf, targaddr)
314 const struct netconfig *nconf;
318 struct netbuf *addr, taddr;
319 struct netbuf addr_to_delete;
320 struct __rpc_sockinfo si;
321 struct addrinfo hints, *res, *tres;
322 struct address_cache *ad_cache;
325 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
327 /* Get the address of the rpcbind. Check cache first */
329 addr_to_delete.len = 0;
330 rwlock_rdlock(&rpcbaddr_cache_lock);
333 ad_cache = check_cache(host, nconf->nc_netid);
334 if (ad_cache != NULL) {
335 addr = ad_cache->ac_taddr;
336 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
337 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
338 if (client != NULL) {
340 *targaddr = strdup(ad_cache->ac_uaddr);
341 rwlock_unlock(&rpcbaddr_cache_lock);
344 addr_to_delete.len = addr->len;
345 addr_to_delete.buf = (char *)malloc(addr->len);
346 if (addr_to_delete.buf == NULL) {
347 addr_to_delete.len = 0;
349 memcpy(addr_to_delete.buf, addr->buf, addr->len);
352 rwlock_unlock(&rpcbaddr_cache_lock);
353 if (addr_to_delete.len != 0) {
355 * Assume this may be due to cache data being
358 rwlock_wrlock(&rpcbaddr_cache_lock);
359 delete_cache(&addr_to_delete);
360 rwlock_unlock(&rpcbaddr_cache_lock);
361 free(addr_to_delete.buf);
363 if (!__rpc_nconf2sockinfo(nconf, &si)) {
364 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
368 memset(&hints, 0, sizeof hints);
369 hints.ai_family = si.si_af;
370 hints.ai_socktype = si.si_socktype;
371 hints.ai_protocol = si.si_proto;
374 printf("trying netid %s family %d proto %d socktype %d\n",
375 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
378 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
379 client = local_rpcb();
382 clnt_pcreateerror("rpcbind clnt interface");
386 struct sockaddr_un sun;
388 *targaddr = malloc(sizeof(sun.sun_path));
389 if (*targaddr == NULL) {
390 CLNT_DESTROY(client);
393 strncpy(*targaddr, _PATH_RPCBINDSOCK,
394 sizeof(sun.sun_path));
399 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
400 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
405 for (tres = res; tres != NULL; tres = tres->ai_next) {
406 taddr.buf = tres->ai_addr;
407 taddr.len = taddr.maxlen = tres->ai_addrlen;
413 ua = taddr2uaddr(nconf, &taddr);
414 fprintf(stderr, "Got it [%s]\n", ua);
423 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
424 taddr.len, taddr.maxlen);
425 fprintf(stderr, "\tAddress is ");
426 for (i = 0; i < taddr.len; i++)
427 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
428 fprintf(stderr, "\n");
431 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
432 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
435 clnt_pcreateerror("rpcbind clnt interface");
440 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
441 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
453 #define IN4_LOCALHOST_STRING "127.0.0.1"
454 #define IN6_LOCALHOST_STRING "::1"
457 * This routine will return a client handle that is connected to the local
458 * rpcbind. Returns NULL on error and free's everything.
464 static struct netconfig *loopnconf;
465 static char *hostname;
469 struct sockaddr_un sun;
472 * Try connecting to the local rpcbind through a local socket
473 * first. If this doesn't work, try all transports defined in
474 * the netconfig file.
476 memset(&sun, 0, sizeof sun);
477 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
480 sun.sun_family = AF_LOCAL;
481 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
482 nbuf.len = sun.sun_len = SUN_LEN(&sun);
483 nbuf.maxlen = sizeof (struct sockaddr_un);
486 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
487 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
488 (rpcvers_t)RPCBVERS, tsize, tsize);
490 if (client != NULL) {
491 /* Mark the socket to be closed in destructor */
492 (void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
496 /* Nobody needs this socket anymore; free the descriptor. */
501 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
502 mutex_lock(&loopnconf_lock);
503 if (loopnconf == NULL) {
504 struct netconfig *nconf, *tmpnconf = NULL;
508 nc_handle = setnetconfig();
509 if (nc_handle == NULL) {
510 /* fails to open netconfig file */
511 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
512 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
513 mutex_unlock(&loopnconf_lock);
516 while ((nconf = getnetconfig(nc_handle)) != NULL) {
518 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
522 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
523 (nconf->nc_semantics == NC_TPI_COTS ||
524 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
525 fd = __rpc_nconf2fd(nconf);
527 * Can't create a socket, assume that
528 * this family isn't configured in the kernel.
534 if (!strcmp(nconf->nc_protofmly, NC_INET))
535 hostname = IN4_LOCALHOST_STRING;
537 hostname = IN6_LOCALHOST_STRING;
540 if (tmpnconf == NULL) {
541 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
542 mutex_unlock(&loopnconf_lock);
545 loopnconf = getnetconfigent(tmpnconf->nc_netid);
546 /* loopnconf is never freed */
547 endnetconfig(nc_handle);
549 mutex_unlock(&loopnconf_lock);
550 client = getclnthandle(hostname, loopnconf, NULL);
555 * Set a mapping between program, version and address.
556 * Calls the rpcbind service to do the mapping.
559 rpcb_set(program, version, nconf, address)
562 const struct netconfig *nconf; /* Network structure of transport */
563 const struct netbuf *address; /* Services netconfig address */
570 /* parameter checking */
572 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
575 if (address == NULL) {
576 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
579 client = local_rpcb();
584 /* convert to universal */
585 /*LINTED const castaway*/
586 parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
587 (struct netbuf *)address);
589 CLNT_DESTROY(client);
590 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
591 return (FALSE); /* no universal address */
593 parms.r_prog = program;
594 parms.r_vers = version;
595 parms.r_netid = nconf->nc_netid;
597 * Though uid is not being used directly, we still send it for
598 * completeness. For non-unix platforms, perhaps some other
599 * string or an empty string can be sent.
601 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
602 parms.r_owner = uidbuf;
604 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
605 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
606 (char *)(void *)&rslt, tottimeout);
608 CLNT_DESTROY(client);
614 * Remove the mapping between program, version and netbuf address.
615 * Calls the rpcbind service to do the un-mapping.
616 * If netbuf is NULL, unset for all the transports, otherwise unset
617 * only for the given transport.
620 rpcb_unset(program, version, nconf)
623 const struct netconfig *nconf;
630 client = local_rpcb();
635 parms.r_prog = program;
636 parms.r_vers = version;
638 parms.r_netid = nconf->nc_netid;
640 /*LINTED const castaway*/
641 parms.r_netid = (char *) &nullstring[0]; /* unsets all */
643 /*LINTED const castaway*/
644 parms.r_addr = (char *) &nullstring[0];
645 (void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
646 parms.r_owner = uidbuf;
648 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
649 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
650 (char *)(void *)&rslt, tottimeout);
652 CLNT_DESTROY(client);
657 * From the merged list, find the appropriate entry
659 static struct netbuf *
660 got_entry(relp, nconf)
661 rpcb_entry_list_ptr relp;
662 const struct netconfig *nconf;
664 struct netbuf *na = NULL;
665 rpcb_entry_list_ptr sp;
668 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
669 rmap = &sp->rpcb_entry_map;
670 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
671 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
672 (nconf->nc_semantics == rmap->r_nc_semantics) &&
673 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
674 na = uaddr2taddr(nconf, rmap->r_maddr);
676 fprintf(stderr, "\tRemote address is [%s].\n",
680 "\tCouldn't resolve remote address!\n");
689 * Quick check to see if rpcbind is up. Tries to connect over
695 struct netconfig *nconf;
696 struct sockaddr_un sun;
701 localhandle = setnetconfig();
702 while ((nconf = getnetconfig(localhandle)) != NULL) {
703 if (nconf->nc_protofmly != NULL &&
704 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
710 endnetconfig(localhandle);
712 memset(&sun, 0, sizeof sun);
713 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
716 sun.sun_family = AF_LOCAL;
717 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
718 sun.sun_len = SUN_LEN(&sun);
720 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
730 * An internal function which optimizes rpcb_getaddr function. It also
731 * returns the client handle that it uses to contact the remote rpcbind.
733 * The algorithm used: If the transports is TCP or UDP, it first tries
734 * version 2 (portmap), 4 and then 3 (svr4). This order should be
735 * changed in the next OS release to 4, 2 and 3. We are assuming that by
736 * that time, version 4 would be available on many machines on the network.
737 * With this algorithm, we get performance as well as a plan for
738 * obsoleting version 2.
740 * For all other transports, the algorithm remains as 4 and then 3.
742 * XXX: Due to some problems with t_connect(), we do not reuse the same client
743 * handle for COTS cases and hence in these cases we do not return the
744 * client handle. This code will change if t_connect() ever
745 * starts working properly. Also look under clnt_vc.c.
748 __rpcb_findaddr_timed(program, version, nconf, host, clpp, tp)
751 const struct netconfig *nconf;
756 static bool_t check_rpcbind = TRUE;
757 CLIENT *client = NULL;
759 enum clnt_stat clnt_st;
762 struct netbuf *address = NULL;
763 rpcvers_t start_vers = RPCBVERS4;
764 struct netbuf servaddr;
766 /* parameter checking */
768 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
775 * Use default total timeout if no timeout is specified.
781 /* Try version 2 for TCP or UDP */
782 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
784 struct netbuf remote;
785 rpcvers_t pmapvers = 2;
786 struct pmap pmapparms;
789 * Try UDP only - there are some portmappers out
790 * there that use UDP only.
792 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
793 struct netconfig *newnconf;
795 if ((newnconf = getnetconfigent("udp")) == NULL) {
796 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
799 client = getclnthandle(host, newnconf, &parms.r_addr);
800 freenetconfigent(newnconf);
802 client = getclnthandle(host, nconf, &parms.r_addr);
808 * Set version and retry timeout.
810 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
811 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
813 pmapparms.pm_prog = program;
814 pmapparms.pm_vers = version;
815 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
816 IPPROTO_UDP : IPPROTO_TCP;
817 pmapparms.pm_port = 0; /* not needed */
818 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
819 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
820 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
822 if (clnt_st != RPC_SUCCESS) {
823 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
824 (clnt_st == RPC_PROGUNAVAIL))
825 goto try_rpcbind; /* Try different versions */
826 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
827 clnt_geterr(client, &rpc_createerr.cf_error);
829 } else if (port == 0) {
831 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
835 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
836 if (((address = (struct netbuf *)
837 malloc(sizeof (struct netbuf))) == NULL) ||
838 ((address->buf = (char *)
839 malloc(remote.len)) == NULL)) {
840 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
841 clnt_geterr(client, &rpc_createerr.cf_error);
848 memcpy(address->buf, remote.buf, remote.len);
849 memcpy(&((char *)address->buf)[sizeof (short)],
850 (char *)(void *)&port, sizeof (short));
851 address->len = address->maxlen = remote.len;
858 * Check if rpcbind is up. This prevents needless delays when
859 * accessing applications such as the keyserver while booting
862 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
863 if (!__rpcbind_is_up()) {
864 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
865 rpc_createerr.cf_error.re_errno = 0;
868 check_rpcbind = FALSE;
872 * Now we try version 4 and then 3.
873 * We also send the remote system the address we used to
874 * contact it in case it can help to connect back with us
876 parms.r_prog = program;
877 parms.r_vers = version;
878 /*LINTED const castaway*/
879 parms.r_owner = (char *) &nullstring[0]; /* not needed; */
880 /* just for xdring */
881 parms.r_netid = nconf->nc_netid; /* not really needed */
884 * If a COTS transport is being used, try getting address via CLTS
885 * transport. This works only with version 4.
887 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
888 nconf->nc_semantics == NC_TPI_COTS) {
891 struct netconfig *nconf_clts;
892 rpcb_entry_list_ptr relp = NULL;
894 if (client == NULL) {
895 /* This did not go through the above PORTMAP/TCP code */
896 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
897 while ((nconf_clts = __rpc_getconf(handle))
899 if (strcmp(nconf_clts->nc_protofmly,
900 nconf->nc_protofmly) != 0) {
903 client = getclnthandle(host, nconf_clts,
907 __rpc_endconf(handle);
910 goto regular_rpcbind; /* Go the regular way */
912 /* This is a UDP PORTMAP handle. Change to version 4 */
914 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
917 * We also send the remote system the address we used to
918 * contact it in case it can help it connect back with us
920 if (parms.r_addr == NULL) {
921 /*LINTED const castaway*/
922 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
925 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
927 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
928 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
929 (xdrproc_t) xdr_rpcb_entry_list_ptr,
930 (char *)(void *)&relp, *tp);
931 if (clnt_st == RPC_SUCCESS) {
932 if ((address = got_entry(relp, nconf)) != NULL) {
933 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
934 (char *)(void *)&relp);
935 CLNT_CONTROL(client, CLGET_SVC_ADDR,
936 (char *)(void *)&servaddr);
937 __rpc_fixup_addr(address, &servaddr);
940 /* Entry not found for this transport */
941 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
942 (char *)(void *)&relp);
944 * XXX: should have perhaps returned with error but
945 * since the remote machine might not always be able
946 * to send the address on all transports, we try the
947 * regular way with regular_rpcbind
949 goto regular_rpcbind;
950 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
951 (clnt_st == RPC_PROGUNAVAIL)) {
952 start_vers = RPCBVERS; /* Try version 3 now */
953 goto regular_rpcbind; /* Try different versions */
955 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
956 clnt_geterr(client, &rpc_createerr.cf_error);
963 /* Now the same transport is to be used to get the address */
964 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
965 (nconf->nc_semantics == NC_TPI_COTS))) {
966 /* A CLTS type of client - destroy it */
967 CLNT_DESTROY(client);
971 if (client == NULL) {
972 client = getclnthandle(host, nconf, &parms.r_addr);
973 if (client == NULL) {
977 if (parms.r_addr == NULL) {
978 /*LINTED const castaway*/
979 parms.r_addr = (char *) &nullstring[0];
982 /* First try from start_vers and then version 3 (RPCBVERS) */
984 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
985 for (vers = start_vers; vers >= RPCBVERS; vers--) {
986 /* Set the version */
987 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
988 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
989 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
990 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
991 if (clnt_st == RPC_SUCCESS) {
992 if ((ua == NULL) || (ua[0] == 0)) {
993 /* address unknown */
994 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
997 address = uaddr2taddr(nconf, ua);
999 fprintf(stderr, "\tRemote address is [%s]\n", ua);
1002 "\tCouldn't resolve remote address!\n");
1004 xdr_free((xdrproc_t)xdr_wrapstring,
1005 (char *)(void *)&ua);
1008 /* We don't know about your universal address */
1009 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
1012 CLNT_CONTROL(client, CLGET_SVC_ADDR,
1013 (char *)(void *)&servaddr);
1014 __rpc_fixup_addr(address, &servaddr);
1016 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
1017 struct rpc_err rpcerr;
1019 clnt_geterr(client, &rpcerr);
1020 if (rpcerr.re_vers.low > RPCBVERS4)
1021 goto error; /* a new version, can't handle */
1022 } else if (clnt_st != RPC_PROGUNAVAIL) {
1023 /* Cant handle this error */
1024 rpc_createerr.cf_stat = clnt_st;
1025 clnt_geterr(client, &rpc_createerr.cf_error);
1032 CLNT_DESTROY(client);
1036 if (nconf->nc_semantics != NC_TPI_CLTS) {
1037 /* This client is the connectionless one */
1039 CLNT_DESTROY(client);
1045 } else if (client) {
1046 CLNT_DESTROY(client);
1048 if (parms.r_addr != NULL && parms.r_addr != nullstring)
1055 * Find the mapped address for program, version.
1056 * Calls the rpcbind service remotely to do the lookup.
1057 * Uses the transport specified in nconf.
1058 * Returns FALSE (0) if no map exists, else returns 1.
1060 * Assuming that the address is all properly allocated
1063 rpcb_getaddr(program, version, nconf, address, host)
1066 const struct netconfig *nconf;
1067 struct netbuf *address;
1072 if ((na = __rpcb_findaddr_timed(program, version,
1073 (struct netconfig *) nconf, (char *) host,
1074 (CLIENT **) NULL, (struct timeval *) NULL)) == NULL)
1077 if (na->len > address->maxlen) {
1078 /* Too long address */
1081 rpc_createerr.cf_stat = RPC_FAILED;
1084 memcpy(address->buf, na->buf, (size_t)na->len);
1085 address->len = na->len;
1092 * Get a copy of the current maps.
1093 * Calls the rpcbind service remotely to get the maps.
1095 * It returns only a list of the services
1096 * It returns NULL on failure.
1099 rpcb_getmaps(nconf, host)
1100 const struct netconfig *nconf;
1103 rpcblist_ptr head = NULL;
1105 enum clnt_stat clnt_st;
1108 client = getclnthandle(host, nconf, NULL);
1109 if (client == NULL) {
1112 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1113 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1114 (char *)(void *)&head, tottimeout);
1115 if (clnt_st == RPC_SUCCESS)
1118 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1119 (clnt_st != RPC_PROGUNAVAIL)) {
1120 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1121 clnt_geterr(client, &rpc_createerr.cf_error);
1125 /* fall back to earlier version */
1126 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1127 if (vers == RPCBVERS4) {
1129 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1130 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1131 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1132 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1135 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1136 clnt_geterr(client, &rpc_createerr.cf_error);
1139 CLNT_DESTROY(client);
1144 * rpcbinder remote-call-service interface.
1145 * This routine is used to call the rpcbind remote call service
1146 * which will look up a service program in the address maps, and then
1147 * remotely call that routine with the given parameters. This allows
1148 * programs to do a lookup and call in one step.
1151 rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
1152 xdrres, resp, tout, addr_ptr)
1153 const struct netconfig *nconf; /* Netconfig structure */
1154 const char *host; /* Remote host name */
1157 rpcproc_t proc; /* Remote proc identifiers */
1158 xdrproc_t xdrargs, xdrres; /* XDR routines */
1159 caddr_t argsp, resp; /* Argument and Result */
1160 struct timeval tout; /* Timeout value for this call */
1161 const struct netbuf *addr_ptr; /* Preallocated netbuf address */
1164 enum clnt_stat stat;
1165 struct r_rpcb_rmtcallargs a;
1166 struct r_rpcb_rmtcallres r;
1167 rpcvers_t rpcb_vers;
1170 client = getclnthandle(host, nconf, NULL);
1171 if (client == NULL) {
1172 return (RPC_FAILED);
1174 /*LINTED const castaway*/
1175 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1179 a.args.args_val = argsp;
1180 a.xdr_args = xdrargs;
1182 r.results.results_val = resp;
1185 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1186 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1187 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1188 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1189 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1190 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1192 /*LINTED const castaway*/
1193 na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1195 stat = RPC_N2AXLATEFAILURE;
1196 /*LINTED const castaway*/
1197 ((struct netbuf *) addr_ptr)->len = 0;
1200 if (na->len > addr_ptr->maxlen) {
1201 /* Too long address */
1202 stat = RPC_FAILED; /* XXX A better error no */
1205 /*LINTED const castaway*/
1206 ((struct netbuf *) addr_ptr)->len = 0;
1209 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1210 /*LINTED const castaway*/
1211 ((struct netbuf *)addr_ptr)->len = na->len;
1215 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1216 (stat != RPC_PROGUNAVAIL)) {
1221 CLNT_DESTROY(client);
1223 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1228 * Gets the time on the remote host.
1229 * Returns 1 if succeeds else 0.
1232 rpcb_gettime(host, timep)
1236 CLIENT *client = NULL;
1238 struct netconfig *nconf;
1243 if ((host == NULL) || (host[0] == 0)) {
1248 if ((handle = __rpc_setconf("netpath")) == NULL) {
1249 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1252 rpc_createerr.cf_stat = RPC_SUCCESS;
1253 while (client == NULL) {
1254 if ((nconf = __rpc_getconf(handle)) == NULL) {
1255 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1256 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1259 client = getclnthandle(host, nconf, NULL);
1263 __rpc_endconf(handle);
1264 if (client == (CLIENT *) NULL) {
1268 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1269 (xdrproc_t) xdr_void, NULL,
1270 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1272 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1273 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1274 if (vers == RPCBVERS4) {
1275 /* fall back to earlier version */
1277 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1278 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1279 (xdrproc_t) xdr_void, NULL,
1280 (xdrproc_t) xdr_int, (char *)(void *)timep,
1284 CLNT_DESTROY(client);
1285 return (st == RPC_SUCCESS? TRUE: FALSE);
1289 * Converts taddr to universal address. This routine should never
1290 * really be called because local n2a libraries are always provided.
1293 rpcb_taddr2uaddr(nconf, taddr)
1294 struct netconfig *nconf;
1295 struct netbuf *taddr;
1301 /* parameter checking */
1302 if (nconf == NULL) {
1303 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1306 if (taddr == NULL) {
1307 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1310 client = local_rpcb();
1315 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1316 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1317 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1318 CLNT_DESTROY(client);
1323 * Converts universal address to netbuf. This routine should never
1324 * really be called because local n2a libraries are always provided.
1327 rpcb_uaddr2taddr(nconf, uaddr)
1328 struct netconfig *nconf;
1332 struct netbuf *taddr;
1335 /* parameter checking */
1336 if (nconf == NULL) {
1337 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1340 if (uaddr == NULL) {
1341 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1344 client = local_rpcb();
1349 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1350 if (taddr == NULL) {
1351 CLNT_DESTROY(client);
1354 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1355 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1356 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1357 tottimeout) != RPC_SUCCESS) {
1361 CLNT_DESTROY(client);