2 * The contents of this file are subject to the Sun Standards
3 * License Version 1.0 the (the "License";) You may not use
4 * this file except in compliance with the License. You may
5 * obtain a copy of the License at lib/libc/rpc/LICENSE
7 * Software distributed under the License is distributed on
8 * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
9 * express or implied. See the License for the specific
10 * language governing rights and limitations under the License.
12 * The Original Code is Copyright 1998 by Sun Microsystems, Inc
14 * The Initial Developer of the Original Code is: Sun
17 * All Rights Reserved.
19 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
20 * unrestricted use provided that this legend is included on all tape
21 * media and as a part of the software program in whole or part. Users
22 * may copy or modify Sun RPC without charge, but are not authorized
23 * to license or distribute it to anyone else except as part of a product or
24 * program developed by the user.
26 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
27 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
30 * Sun RPC is provided with no support and without any obligation on the
31 * part of Sun Microsystems, Inc. to assist in its use, correction,
32 * modification or enhancement.
34 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
35 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
36 * OR ANY PART THEREOF.
38 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
39 * or profits or other special, indirect and consequential damages, even if
40 * Sun has been advised of the possibility of such damages.
42 * Sun Microsystems, Inc.
44 * Mountain View, California 94043
45 * @(#)rpcb_clnt.c 1.27 94/04/24 SMI; 1.30 89/06/21 Copyr 1988 Sun Micro
46 * $NetBSD: rpcb_clnt.c,v 1.6 2000/07/16 06:41:43 itojun Exp $
47 * $FreeBSD: src/lib/libc/rpc/rpcb_clnt.c,v 1.17 2007/09/20 22:35:24 matteo Exp $
50 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
55 * interface to rpcbind rpc service.
57 * Copyright (C) 1988, Sun Microsystems, Inc.
60 #include "namespace.h"
61 #include "reentrant.h"
62 #include <sys/types.h>
63 #include <sys/socket.h>
65 #include <sys/utsname.h>
67 #include <rpc/rpcb_prot.h>
68 #include <rpc/nettype.h>
69 #include <netconfig.h>
71 #include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
72 #include <rpc/pmap_prot.h>
81 #include "un-namespace.h"
86 static struct timeval tottimeout = { 60, 0 };
87 static const struct timeval rmttimeout = { 3, 0 };
88 static struct timeval rpcbrmttime = { 15, 0 };
90 extern bool_t xdr_wrapstring(XDR *, char **);
92 static const char nullstring[] = "\000";
96 struct address_cache {
100 struct netbuf *ac_taddr;
101 struct address_cache *ac_next;
104 static struct address_cache *front;
105 static int cachesize;
107 #define CLCR_GET_RPCB_TIMEOUT 1
108 #define CLCR_SET_RPCB_TIMEOUT 2
111 extern int __rpc_lowvers;
113 static struct address_cache *check_cache(const char *, const char *);
114 static void delete_cache(struct netbuf *);
115 static void add_cache(const char *, const char *, struct netbuf *, char *);
116 static CLIENT *getclnthandle(const char *, const struct netconfig *, char **);
117 static CLIENT *local_rpcb(void);
118 static struct netbuf *got_entry(rpcb_entry_list_ptr, const struct netconfig *);
121 * This routine adjusts the timeout used for calls to the remote rpcbind.
122 * Also, this routine can be used to set the use of portmapper version 2
123 * only when doing rpc_broadcasts
124 * These are private routines that may not be provided in future releases.
127 __rpc_control(int request, void *info)
130 case CLCR_GET_RPCB_TIMEOUT:
131 *(struct timeval *)info = tottimeout;
133 case CLCR_SET_RPCB_TIMEOUT:
134 tottimeout = *(struct timeval *)info;
136 case CLCR_SET_LOWVERS:
137 __rpc_lowvers = *(int *)info;
139 case CLCR_GET_LOWVERS:
140 *(int *)info = __rpc_lowvers;
149 * It might seem that a reader/writer lock would be more reasonable here.
150 * However because getclnthandle(), the only user of the cache functions,
151 * may do a delete_cache() operation if a check_cache() fails to return an
152 * address useful to clnt_tli_create(), we may as well use a mutex.
155 * As it turns out, if the cache lock is *not* a reader/writer lock, we will
156 * block all clnt_create's if we are trying to connect to a host that's down,
157 * since the lock will be held all during that time.
161 * The routines check_cache(), add_cache(), delete_cache() manage the
162 * cache of rpcbind addresses for (host, netid).
165 static struct address_cache *
166 check_cache(const char *host, const char *netid)
168 struct address_cache *cptr;
170 /* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
172 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
173 if (!strcmp(cptr->ac_host, host) &&
174 !strcmp(cptr->ac_netid, netid)) {
176 fprintf(stderr, "Found cache entry for %s: %s\n",
186 delete_cache(struct netbuf *addr)
188 struct address_cache *cptr, *prevptr = NULL;
190 /* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
191 for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
192 if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
194 free(cptr->ac_netid);
195 free(cptr->ac_taddr->buf);
196 free(cptr->ac_taddr);
198 free(cptr->ac_uaddr);
200 prevptr->ac_next = cptr->ac_next;
202 front = cptr->ac_next;
212 add_cache(const char *host, const char *netid, struct netbuf *taddr,
215 struct address_cache *ad_cache, *cptr, *prevptr;
217 ad_cache = (struct address_cache *)
218 malloc(sizeof (struct address_cache));
222 ad_cache->ac_host = strdup(host);
223 ad_cache->ac_netid = strdup(netid);
224 ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
225 ad_cache->ac_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
226 if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
227 (uaddr && !ad_cache->ac_uaddr)) {
230 ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
231 ad_cache->ac_taddr->buf = (char *) malloc(taddr->len);
232 if (ad_cache->ac_taddr->buf == NULL) {
234 if (ad_cache->ac_host)
235 free(ad_cache->ac_host);
236 if (ad_cache->ac_netid)
237 free(ad_cache->ac_netid);
238 if (ad_cache->ac_uaddr)
239 free(ad_cache->ac_uaddr);
240 if (ad_cache->ac_taddr)
241 free(ad_cache->ac_taddr);
245 memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
247 fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
250 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
252 rwlock_wrlock(&rpcbaddr_cache_lock);
253 if (cachesize < CACHESIZE) {
254 ad_cache->ac_next = front;
258 /* Free the last entry */
261 while (cptr->ac_next) {
263 cptr = cptr->ac_next;
267 fprintf(stderr, "Deleted from cache: %s : %s\n",
268 cptr->ac_host, cptr->ac_netid);
271 free(cptr->ac_netid);
272 free(cptr->ac_taddr->buf);
273 free(cptr->ac_taddr);
275 free(cptr->ac_uaddr);
278 prevptr->ac_next = NULL;
279 ad_cache->ac_next = front;
283 ad_cache->ac_next = NULL;
287 rwlock_unlock(&rpcbaddr_cache_lock);
291 * This routine will return a client handle that is connected to the
292 * rpcbind. If targaddr is non-NULL, the "universal address" of the
293 * host will be stored in *targaddr; the caller is responsible for
294 * freeing this string.
295 * On error, returns NULL and free's everything.
298 getclnthandle(const char *host, const struct netconfig *nconf, char **targaddr)
301 struct netbuf *addr, taddr;
302 struct netbuf addr_to_delete;
303 struct __rpc_sockinfo si;
304 struct addrinfo hints, *res, *tres;
305 struct address_cache *ad_cache;
308 /* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
310 /* Get the address of the rpcbind. Check cache first */
312 addr_to_delete.len = 0;
313 rwlock_rdlock(&rpcbaddr_cache_lock);
316 ad_cache = check_cache(host, nconf->nc_netid);
317 if (ad_cache != NULL) {
318 addr = ad_cache->ac_taddr;
319 client = clnt_tli_create(RPC_ANYFD, nconf, addr,
320 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
321 if (client != NULL) {
323 *targaddr = strdup(ad_cache->ac_uaddr);
324 rwlock_unlock(&rpcbaddr_cache_lock);
327 addr_to_delete.len = addr->len;
328 addr_to_delete.buf = (char *)malloc(addr->len);
329 if (addr_to_delete.buf == NULL) {
330 addr_to_delete.len = 0;
332 memcpy(addr_to_delete.buf, addr->buf, addr->len);
335 rwlock_unlock(&rpcbaddr_cache_lock);
336 if (addr_to_delete.len != 0) {
338 * Assume this may be due to cache data being
341 rwlock_wrlock(&rpcbaddr_cache_lock);
342 delete_cache(&addr_to_delete);
343 rwlock_unlock(&rpcbaddr_cache_lock);
344 free(addr_to_delete.buf);
346 if (!__rpc_nconf2sockinfo(nconf, &si)) {
347 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
351 memset(&hints, 0, sizeof hints);
352 hints.ai_family = si.si_af;
353 hints.ai_socktype = si.si_socktype;
354 hints.ai_protocol = si.si_proto;
357 printf("trying netid %s family %d proto %d socktype %d\n",
358 nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
361 if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
362 client = local_rpcb();
365 clnt_pcreateerror("rpcbind clnt interface");
369 struct sockaddr_un sun;
371 *targaddr = malloc(sizeof(sun.sun_path));
372 if (*targaddr == NULL) {
373 CLNT_DESTROY(client);
376 strncpy(*targaddr, _PATH_RPCBINDSOCK,
377 sizeof(sun.sun_path));
382 if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
383 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
388 for (tres = res; tres != NULL; tres = tres->ai_next) {
389 taddr.buf = tres->ai_addr;
390 taddr.len = taddr.maxlen = tres->ai_addrlen;
396 ua = taddr2uaddr(nconf, &taddr);
397 fprintf(stderr, "Got it [%s]\n", ua);
406 fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
407 taddr.len, taddr.maxlen);
408 fprintf(stderr, "\tAddress is ");
409 for (i = 0; i < taddr.len; i++)
410 fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
411 fprintf(stderr, "\n");
414 client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
415 (rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
418 clnt_pcreateerror("rpcbind clnt interface");
423 tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
424 add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
436 #define IN4_LOCALHOST_STRING "127.0.0.1"
437 #define IN6_LOCALHOST_STRING "::1"
440 * This routine will return a client handle that is connected to the local
441 * rpcbind. Returns NULL on error and free's everything.
447 static struct netconfig *loopnconf;
448 static char *hostname;
452 struct sockaddr_un sun;
455 * Try connecting to the local rpcbind through a local socket
456 * first. If this doesn't work, try all transports defined in
457 * the netconfig file.
459 memset(&sun, 0, sizeof sun);
460 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
463 sun.sun_family = AF_LOCAL;
464 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
465 nbuf.len = sun.sun_len = SUN_LEN(&sun);
466 nbuf.maxlen = sizeof (struct sockaddr_un);
469 tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
470 client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
471 (rpcvers_t)RPCBVERS, tsize, tsize);
473 if (client != NULL) {
474 /* Mark the socket to be closed in destructor */
475 CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
479 /* Nobody needs this socket anymore; free the descriptor. */
484 /* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
485 mutex_lock(&loopnconf_lock);
486 if (loopnconf == NULL) {
487 struct netconfig *nconf, *tmpnconf = NULL;
491 nc_handle = setnetconfig();
492 if (nc_handle == NULL) {
493 /* fails to open netconfig file */
494 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
495 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
496 mutex_unlock(&loopnconf_lock);
499 while ((nconf = getnetconfig(nc_handle)) != NULL) {
501 if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
505 strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
506 (nconf->nc_semantics == NC_TPI_COTS ||
507 nconf->nc_semantics == NC_TPI_COTS_ORD)) {
508 fd = __rpc_nconf2fd(nconf);
510 * Can't create a socket, assume that
511 * this family isn't configured in the kernel.
517 if (!strcmp(nconf->nc_protofmly, NC_INET))
518 hostname = IN4_LOCALHOST_STRING;
520 hostname = IN6_LOCALHOST_STRING;
523 if (tmpnconf == NULL) {
524 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
525 mutex_unlock(&loopnconf_lock);
528 loopnconf = getnetconfigent(tmpnconf->nc_netid);
529 /* loopnconf is never freed */
530 endnetconfig(nc_handle);
532 mutex_unlock(&loopnconf_lock);
533 client = getclnthandle(hostname, loopnconf, NULL);
538 * Set a mapping between program, version and address.
539 * Calls the rpcbind service to do the mapping.
542 rpcb_set(rpcprog_t program, rpcvers_t version,
543 const struct netconfig *nconf, /* Network structure of transport */
544 const struct netbuf *address) /* Services netconfig address */
551 /* parameter checking */
553 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
556 if (address == NULL) {
557 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
560 client = local_rpcb();
565 /* convert to universal */
566 /*LINTED const castaway*/
567 parms.r_addr = taddr2uaddr((struct netconfig *) nconf,
568 (struct netbuf *)address);
570 CLNT_DESTROY(client);
571 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
572 return (FALSE); /* no universal address */
574 parms.r_prog = program;
575 parms.r_vers = version;
576 parms.r_netid = nconf->nc_netid;
578 * Though uid is not being used directly, we still send it for
579 * completeness. For non-unix platforms, perhaps some other
580 * string or an empty string can be sent.
582 snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
583 parms.r_owner = uidbuf;
585 CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
586 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
587 (char *)(void *)&rslt, tottimeout);
589 CLNT_DESTROY(client);
595 * Remove the mapping between program, version and netbuf address.
596 * Calls the rpcbind service to do the un-mapping.
597 * If netbuf is NULL, unset for all the transports, otherwise unset
598 * only for the given transport.
601 rpcb_unset(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf)
608 client = local_rpcb();
613 parms.r_prog = program;
614 parms.r_vers = version;
616 parms.r_netid = nconf->nc_netid;
618 /*LINTED const castaway*/
619 parms.r_netid = (char *) &nullstring[0]; /* unsets all */
621 /*LINTED const castaway*/
622 parms.r_addr = (char *) &nullstring[0];
623 snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
624 parms.r_owner = uidbuf;
626 CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
627 (char *)(void *)&parms, (xdrproc_t) xdr_bool,
628 (char *)(void *)&rslt, tottimeout);
630 CLNT_DESTROY(client);
635 * From the merged list, find the appropriate entry
637 static struct netbuf *
638 got_entry(rpcb_entry_list_ptr relp, const struct netconfig *nconf)
640 struct netbuf *na = NULL;
641 rpcb_entry_list_ptr sp;
644 for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
645 rmap = &sp->rpcb_entry_map;
646 if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
647 (strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
648 (nconf->nc_semantics == rmap->r_nc_semantics) &&
649 (rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
650 na = uaddr2taddr(nconf, rmap->r_maddr);
652 fprintf(stderr, "\tRemote address is [%s].\n",
656 "\tCouldn't resolve remote address!\n");
665 * Quick check to see if rpcbind is up. Tries to connect over
669 __rpcbind_is_up(void)
671 struct netconfig *nconf;
672 struct sockaddr_un sun;
677 localhandle = setnetconfig();
678 while ((nconf = getnetconfig(localhandle)) != NULL) {
679 if (nconf->nc_protofmly != NULL &&
680 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
686 endnetconfig(localhandle);
688 memset(&sun, 0, sizeof sun);
689 sock = _socket(AF_LOCAL, SOCK_STREAM, 0);
692 sun.sun_family = AF_LOCAL;
693 strncpy(sun.sun_path, _PATH_RPCBINDSOCK, sizeof(sun.sun_path));
694 sun.sun_len = SUN_LEN(&sun);
696 if (_connect(sock, (struct sockaddr *)&sun, sun.sun_len) < 0) {
706 * An internal function which optimizes rpcb_getaddr function. It also
707 * returns the client handle that it uses to contact the remote rpcbind.
709 * The algorithm used: If the transports is TCP or UDP, it first tries
710 * version 2 (portmap), 4 and then 3 (svr4). This order should be
711 * changed in the next OS release to 4, 2 and 3. We are assuming that by
712 * that time, version 4 would be available on many machines on the network.
713 * With this algorithm, we get performance as well as a plan for
714 * obsoleting version 2.
716 * For all other transports, the algorithm remains as 4 and then 3.
718 * XXX: Due to some problems with t_connect(), we do not reuse the same client
719 * handle for COTS cases and hence in these cases we do not return the
720 * client handle. This code will change if t_connect() ever
721 * starts working properly. Also look under clnt_vc.c.
724 __rpcb_findaddr_timed(rpcprog_t program, rpcvers_t version,
725 const struct netconfig *nconf, const char *host,
726 CLIENT **clpp, struct timeval *tp)
728 static bool_t check_rpcbind = TRUE;
729 CLIENT *client = NULL;
731 enum clnt_stat clnt_st;
734 struct netbuf *address = NULL;
735 rpcvers_t start_vers = RPCBVERS4;
736 struct netbuf servaddr;
738 /* parameter checking */
740 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
747 * Use default total timeout if no timeout is specified.
753 /* Try version 2 for TCP or UDP */
754 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
756 struct netbuf remote;
757 rpcvers_t pmapvers = 2;
758 struct pmap pmapparms;
761 * Try UDP only - there are some portmappers out
762 * there that use UDP only.
764 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
765 struct netconfig *newnconf;
767 if ((newnconf = getnetconfigent("udp")) == NULL) {
768 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
771 client = getclnthandle(host, newnconf, &parms.r_addr);
772 freenetconfigent(newnconf);
774 client = getclnthandle(host, nconf, &parms.r_addr);
780 * Set version and retry timeout.
782 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
783 CLNT_CONTROL(client, CLSET_VERS, (char *)&pmapvers);
785 pmapparms.pm_prog = program;
786 pmapparms.pm_vers = version;
787 pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
788 IPPROTO_UDP : IPPROTO_TCP;
789 pmapparms.pm_port = 0; /* not needed */
790 clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
791 (xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
792 (xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
794 if (clnt_st != RPC_SUCCESS) {
795 if ((clnt_st == RPC_PROGVERSMISMATCH) ||
796 (clnt_st == RPC_PROGUNAVAIL))
797 goto try_rpcbind; /* Try different versions */
798 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
799 clnt_geterr(client, &rpc_createerr.cf_error);
801 } else if (port == 0) {
803 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
807 CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)&remote);
808 if (((address = (struct netbuf *)
809 malloc(sizeof (struct netbuf))) == NULL) ||
810 ((address->buf = (char *)
811 malloc(remote.len)) == NULL)) {
812 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
813 clnt_geterr(client, &rpc_createerr.cf_error);
820 memcpy(address->buf, remote.buf, remote.len);
821 memcpy(&((char *)address->buf)[sizeof (short)],
822 (char *)(void *)&port, sizeof (short));
823 address->len = address->maxlen = remote.len;
830 * Check if rpcbind is up. This prevents needless delays when
831 * accessing applications such as the keyserver while booting
834 if (check_rpcbind && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
835 if (!__rpcbind_is_up()) {
836 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
837 rpc_createerr.cf_error.re_errno = 0;
840 check_rpcbind = FALSE;
844 * Now we try version 4 and then 3.
845 * We also send the remote system the address we used to
846 * contact it in case it can help to connect back with us
848 parms.r_prog = program;
849 parms.r_vers = version;
850 /*LINTED const castaway*/
851 parms.r_owner = (char *) &nullstring[0]; /* not needed; */
852 /* just for xdring */
853 parms.r_netid = nconf->nc_netid; /* not really needed */
856 * If a COTS transport is being used, try getting address via CLTS
857 * transport. This works only with version 4.
859 if (nconf->nc_semantics == NC_TPI_COTS_ORD ||
860 nconf->nc_semantics == NC_TPI_COTS) {
863 struct netconfig *nconf_clts;
864 rpcb_entry_list_ptr relp = NULL;
866 if (client == NULL) {
867 /* This did not go through the above PORTMAP/TCP code */
868 if ((handle = __rpc_setconf("datagram_v")) != NULL) {
869 while ((nconf_clts = __rpc_getconf(handle))
871 if (strcmp(nconf_clts->nc_protofmly,
872 nconf->nc_protofmly) != 0) {
875 client = getclnthandle(host, nconf_clts,
879 __rpc_endconf(handle);
882 goto regular_rpcbind; /* Go the regular way */
884 /* This is a UDP PORTMAP handle. Change to version 4 */
886 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
889 * We also send the remote system the address we used to
890 * contact it in case it can help it connect back with us
892 if (parms.r_addr == NULL) {
893 /*LINTED const castaway*/
894 parms.r_addr = (char *) &nullstring[0]; /* for XDRing */
897 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)&rpcbrmttime);
899 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
900 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
901 (xdrproc_t) xdr_rpcb_entry_list_ptr,
902 (char *)(void *)&relp, *tp);
903 if (clnt_st == RPC_SUCCESS) {
904 if ((address = got_entry(relp, nconf)) != NULL) {
905 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
906 (char *)(void *)&relp);
907 CLNT_CONTROL(client, CLGET_SVC_ADDR,
908 (char *)(void *)&servaddr);
909 __rpc_fixup_addr(address, &servaddr);
912 /* Entry not found for this transport */
913 xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
914 (char *)(void *)&relp);
916 * XXX: should have perhaps returned with error but
917 * since the remote machine might not always be able
918 * to send the address on all transports, we try the
919 * regular way with regular_rpcbind
921 goto regular_rpcbind;
922 } else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
923 (clnt_st == RPC_PROGUNAVAIL)) {
924 start_vers = RPCBVERS; /* Try version 3 now */
925 goto regular_rpcbind; /* Try different versions */
927 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
928 clnt_geterr(client, &rpc_createerr.cf_error);
935 /* Now the same transport is to be used to get the address */
936 if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
937 (nconf->nc_semantics == NC_TPI_COTS))) {
938 /* A CLTS type of client - destroy it */
939 CLNT_DESTROY(client);
943 if (client == NULL) {
944 client = getclnthandle(host, nconf, &parms.r_addr);
945 if (client == NULL) {
949 if (parms.r_addr == NULL) {
950 /*LINTED const castaway*/
951 parms.r_addr = (char *) &nullstring[0];
954 /* First try from start_vers and then version 3 (RPCBVERS) */
956 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *) &rpcbrmttime);
957 for (vers = start_vers; vers >= RPCBVERS; vers--) {
958 /* Set the version */
959 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
960 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
961 (xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
962 (xdrproc_t) xdr_wrapstring, (char *)(void *) &ua, *tp);
963 if (clnt_st == RPC_SUCCESS) {
964 if ((ua == NULL) || (ua[0] == 0)) {
965 /* address unknown */
966 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
969 address = uaddr2taddr(nconf, ua);
971 fprintf(stderr, "\tRemote address is [%s]\n", ua);
974 "\tCouldn't resolve remote address!\n");
976 xdr_free((xdrproc_t)xdr_wrapstring,
977 (char *)(void *)&ua);
980 /* We don't know about your universal address */
981 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
984 CLNT_CONTROL(client, CLGET_SVC_ADDR,
985 (char *)(void *)&servaddr);
986 __rpc_fixup_addr(address, &servaddr);
988 } else if (clnt_st == RPC_PROGVERSMISMATCH) {
989 struct rpc_err rpcerr;
991 clnt_geterr(client, &rpcerr);
992 if (rpcerr.re_vers.low > RPCBVERS4)
993 goto error; /* a new version, can't handle */
994 } else if (clnt_st != RPC_PROGUNAVAIL) {
995 /* Cant handle this error */
996 rpc_createerr.cf_stat = clnt_st;
997 clnt_geterr(client, &rpc_createerr.cf_error);
1004 CLNT_DESTROY(client);
1008 if (nconf->nc_semantics != NC_TPI_CLTS) {
1009 /* This client is the connectionless one */
1011 CLNT_DESTROY(client);
1017 } else if (client) {
1018 CLNT_DESTROY(client);
1020 if (parms.r_addr != NULL && parms.r_addr != nullstring)
1027 * Find the mapped address for program, version.
1028 * Calls the rpcbind service remotely to do the lookup.
1029 * Uses the transport specified in nconf.
1030 * Returns FALSE (0) if no map exists, else returns 1.
1032 * Assuming that the address is all properly allocated
1035 rpcb_getaddr(rpcprog_t program, rpcvers_t version,
1036 const struct netconfig *nconf, struct netbuf *address,
1041 if ((na = __rpcb_findaddr_timed(program, version,
1042 (struct netconfig *) nconf, (char *) host,
1043 NULL, NULL)) == NULL)
1046 if (na->len > address->maxlen) {
1047 /* Too long address */
1050 rpc_createerr.cf_stat = RPC_FAILED;
1053 memcpy(address->buf, na->buf, (size_t)na->len);
1054 address->len = na->len;
1061 * Get a copy of the current maps.
1062 * Calls the rpcbind service remotely to get the maps.
1064 * It returns only a list of the services
1065 * It returns NULL on failure.
1068 rpcb_getmaps(const struct netconfig *nconf, const char *host)
1070 rpcblist_ptr head = NULL;
1072 enum clnt_stat clnt_st;
1075 client = getclnthandle(host, nconf, NULL);
1076 if (client == NULL) {
1079 clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1080 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1081 (char *)(void *)&head, tottimeout);
1082 if (clnt_st == RPC_SUCCESS)
1085 if ((clnt_st != RPC_PROGVERSMISMATCH) &&
1086 (clnt_st != RPC_PROGUNAVAIL)) {
1087 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1088 clnt_geterr(client, &rpc_createerr.cf_error);
1092 /* fall back to earlier version */
1093 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1094 if (vers == RPCBVERS4) {
1096 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1097 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
1098 (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
1099 (char *)(void *)&head, tottimeout) == RPC_SUCCESS)
1102 rpc_createerr.cf_stat = RPC_RPCBFAILURE;
1103 clnt_geterr(client, &rpc_createerr.cf_error);
1106 CLNT_DESTROY(client);
1111 * rpcbinder remote-call-service interface.
1112 * This routine is used to call the rpcbind remote call service
1113 * which will look up a service program in the address maps, and then
1114 * remotely call that routine with the given parameters. This allows
1115 * programs to do a lookup and call in one step.
1118 rpcb_rmtcall(const struct netconfig *nconf, const char *host, rpcprog_t prog,
1119 rpcvers_t vers, rpcproc_t proc, xdrproc_t xdrargs, caddr_t argsp,
1120 xdrproc_t xdrres, caddr_t resp, struct timeval tout,
1121 const struct netbuf *addr_ptr)
1124 enum clnt_stat stat;
1125 struct r_rpcb_rmtcallargs a;
1126 struct r_rpcb_rmtcallres r;
1127 rpcvers_t rpcb_vers;
1130 client = getclnthandle(host, nconf, NULL);
1131 if (client == NULL) {
1132 return (RPC_FAILED);
1134 /*LINTED const castaway*/
1135 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, (char *)(void *)&rmttimeout);
1139 a.args.args_val = argsp;
1140 a.xdr_args = xdrargs;
1142 r.results.results_val = resp;
1145 for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
1146 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
1147 stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
1148 (xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
1149 (xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
1150 if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
1152 /*LINTED const castaway*/
1153 na = uaddr2taddr((struct netconfig *) nconf, r.addr);
1155 stat = RPC_N2AXLATEFAILURE;
1156 /*LINTED const castaway*/
1157 ((struct netbuf *) addr_ptr)->len = 0;
1160 if (na->len > addr_ptr->maxlen) {
1161 /* Too long address */
1162 stat = RPC_FAILED; /* XXX A better error no */
1165 /*LINTED const castaway*/
1166 ((struct netbuf *) addr_ptr)->len = 0;
1169 memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
1170 /*LINTED const castaway*/
1171 ((struct netbuf *)addr_ptr)->len = na->len;
1175 } else if ((stat != RPC_PROGVERSMISMATCH) &&
1176 (stat != RPC_PROGUNAVAIL)) {
1181 CLNT_DESTROY(client);
1183 xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
1188 * Gets the time on the remote host.
1189 * Returns 1 if succeeds else 0.
1192 rpcb_gettime(const char *host, time_t *timep)
1194 CLIENT *client = NULL;
1196 struct netconfig *nconf;
1201 if ((host == NULL) || (host[0] == 0)) {
1206 if ((handle = __rpc_setconf("netpath")) == NULL) {
1207 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1210 rpc_createerr.cf_stat = RPC_SUCCESS;
1211 while (client == NULL) {
1212 if ((nconf = __rpc_getconf(handle)) == NULL) {
1213 if (rpc_createerr.cf_stat == RPC_SUCCESS)
1214 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1217 client = getclnthandle(host, nconf, NULL);
1221 __rpc_endconf(handle);
1222 if (client == NULL) {
1226 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1227 (xdrproc_t) xdr_void, NULL,
1228 (xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
1230 if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
1231 CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
1232 if (vers == RPCBVERS4) {
1233 /* fall back to earlier version */
1235 CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
1236 st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
1237 (xdrproc_t) xdr_void, NULL,
1238 (xdrproc_t) xdr_int, (char *)(void *)timep,
1242 CLNT_DESTROY(client);
1243 return (st == RPC_SUCCESS);
1247 * Converts taddr to universal address. This routine should never
1248 * really be called because local n2a libraries are always provided.
1251 rpcb_taddr2uaddr(struct netconfig *nconf, struct netbuf *taddr)
1257 /* parameter checking */
1258 if (nconf == NULL) {
1259 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1262 if (taddr == NULL) {
1263 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1266 client = local_rpcb();
1271 CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
1272 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1273 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
1274 CLNT_DESTROY(client);
1279 * Converts universal address to netbuf. This routine should never
1280 * really be called because local n2a libraries are always provided.
1283 rpcb_uaddr2taddr(struct netconfig *nconf, char *uaddr)
1286 struct netbuf *taddr;
1289 /* parameter checking */
1290 if (nconf == NULL) {
1291 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
1294 if (uaddr == NULL) {
1295 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
1298 client = local_rpcb();
1303 taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
1304 if (taddr == NULL) {
1305 CLNT_DESTROY(client);
1308 if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
1309 (xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
1310 (xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
1311 tottimeout) != RPC_SUCCESS) {
1315 CLNT_DESTROY(client);