pmap_getport.c revision 1.8 
1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part.  Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12 *
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
16 *
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
20 *
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char *rcsid = "$OpenBSD: pmap_getport.c,v 1.8 2005/01/08 19:17:39 krw Exp $";
32#endif /* LIBC_SCCS and not lint */
33
34/*
35 * pmap_getport.c
36 * Client interface to pmap rpc service.
37 *
38 * Copyright (C) 1984, Sun Microsystems, Inc.
39 */
40
41#include <unistd.h>
42#include <rpc/rpc.h>
43#include <rpc/pmap_prot.h>
44#include <rpc/pmap_clnt.h>
45#include <sys/socket.h>
46#include <net/if.h>
47
48static struct timeval timeout = { 5, 0 };
49static struct timeval tottimeout = { 60, 0 };
50
51/*
52 * Find the mapped port for program,version.
53 * Calls the pmap service remotely to do the lookup.
54 * Returns 0 if no map exists.
55 */
56u_short
57pmap_getport(address, program, version, protocol)
58	struct sockaddr_in *address;
59	u_long program;
60	u_long version;
61	u_int protocol;
62{
63	u_short port = 0;
64	int sock = -1;
65	CLIENT *client;
66	struct pmap parms;
67
68	address->sin_port = htons(PMAPPORT);
69	client = clntudp_bufcreate(address, PMAPPROG,
70	    PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
71	if (client != NULL) {
72		parms.pm_prog = program;
73		parms.pm_vers = version;
74		parms.pm_prot = protocol;
75		parms.pm_port = 0;  /* not needed or used */
76		if (CLNT_CALL(client, PMAPPROC_GETPORT, xdr_pmap, &parms,
77		    xdr_u_short, &port, tottimeout) != RPC_SUCCESS){
78			rpc_createerr.cf_stat = RPC_PMAPFAILURE;
79			clnt_geterr(client, &rpc_createerr.cf_error);
80		} else if (port == 0) {
81			rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
82		}
83		CLNT_DESTROY(client);
84	}
85	if (sock != -1)
86		(void)close(sock);
87	address->sin_port = 0;
88	return (port);
89}
90