1/*	$NetBSD: pmap_getport.c,v 1.16 2000/07/06 03:10:34 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 *   this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 *   this list of conditions and the following disclaimer in the documentation
13 *   and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 *   contributors may be used to endorse or promote products derived
16 *   from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#if defined(LIBC_SCCS) && !defined(lint)
32static char *sccsid2 = "from: @(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro";
33static char *sccsid = "from: @(#)pmap_getport.c	2.2 88/08/01 4.0 RPCSRC";
34#endif
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38/*
39 * pmap_getport.c
40 * Client interface to pmap rpc service.
41 *
42 * Copyright (C) 1984, Sun Microsystems, Inc.
43 */
44
45#include "namespace.h"
46#include <sys/types.h>
47#include <sys/socket.h>
48
49#include <arpa/inet.h>
50#include <net/if.h>
51
52#include <assert.h>
53#include <unistd.h>
54
55#include <rpc/rpc.h>
56#include <rpc/pmap_prot.h>
57#include <rpc/pmap_clnt.h>
58#include "un-namespace.h"
59
60static const struct timeval timeout = { 5, 0 };
61static const struct timeval tottimeout = { 60, 0 };
62
63/*
64 * Find the mapped port for program,version.
65 * Calls the pmap service remotely to do the lookup.
66 * Returns 0 if no map exists.
67 */
68u_short
69pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
70    u_int protocol)
71{
72	u_short port = 0;
73	int sock = -1;
74	CLIENT *client;
75	struct pmap parms;
76
77	assert(address != NULL);
78
79	address->sin_port = htons(PMAPPORT);
80	client = clntudp_bufcreate(address, PMAPPROG,
81	    PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
82	if (client != NULL) {
83		parms.pm_prog = program;
84		parms.pm_vers = version;
85		parms.pm_prot = protocol;
86		parms.pm_port = 0;  /* not needed or used */
87		if (CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
88		    (xdrproc_t)xdr_pmap,
89		    &parms, (xdrproc_t)xdr_u_short, &port, tottimeout) !=
90		    RPC_SUCCESS){
91			rpc_createerr.cf_stat = RPC_PMAPFAILURE;
92			clnt_geterr(client, &rpc_createerr.cf_error);
93		} else if (port == 0) {
94			rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
95		}
96		CLNT_DESTROY(client);
97	}
98	address->sin_port = 0;
99	return (port);
100}
101