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