1 /* $OpenBSD: pmap_getport.c,v 1.13 2015/09/13 15:36:56 guenther Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, 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
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * pmap_getport.c
36 * Client interface to pmap rpc service.
37 */
38
39 #include <unistd.h>
40 #include <rpc/rpc.h>
41 #include <rpc/pmap_prot.h>
42 #include <rpc/pmap_clnt.h>
43 #include <sys/socket.h>
44 #include <net/if.h>
45
46 static struct timeval timeout = { 5, 0 };
47 static struct timeval tottimeout = { 60, 0 };
48
49 /*
50 * Find the mapped port for program,version.
51 * Calls the pmap service remotely to do the lookup.
52 * Returns 0 if no map exists.
53 */
54 u_short
pmap_getport(struct sockaddr_in * address,u_long program,u_long version,u_int protocol)55 pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
56 u_int protocol)
57 {
58 u_short port = 0;
59 int sock = -1;
60 CLIENT *client;
61 struct pmap parms;
62
63 address->sin_port = htons(PMAPPORT);
64 client = clntudp_bufcreate(address, PMAPPROG,
65 PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
66 if (client != NULL) {
67 parms.pm_prog = program;
68 parms.pm_vers = version;
69 parms.pm_prot = protocol;
70 parms.pm_port = 0; /* not needed or used */
71 if (CLNT_CALL(client, PMAPPROC_GETPORT, xdr_pmap, &parms,
72 xdr_u_short, &port, tottimeout) != RPC_SUCCESS){
73 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
74 clnt_geterr(client, &rpc_createerr.cf_error);
75 } else if (port == 0) {
76 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
77 }
78 CLNT_DESTROY(client);
79 }
80 address->sin_port = 0;
81 return (port);
82 }
83 DEF_WEAK(pmap_getport);
84