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/* $NetBSD: pmap_getport.c,v 1.19 2013/03/11 20:19:29 tron Exp $ */
/*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the "Oracle America, Inc." nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char *sccsid = "@(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro";
static char *sccsid = "@(#)pmap_getport.c 2.2 88/08/01 4.0 RPCSRC";
#else
__RCSID("$NetBSD: pmap_getport.c,v 1.19 2013/03/11 20:19:29 tron Exp $");
#endif
#endif
/*
* pmap_getport.c
* Client interface to pmap rpc service.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*/
#include "namespace.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <assert.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#ifdef __weak_alias
__weak_alias(pmap_getport,_pmap_getport)
#endif
static const struct timeval timeout = { 5, 0 };
static const struct timeval tottimeout = { 60, 0 };
/*
* Find the mapped port for program,version.
* Calls the pmap service remotely to do the lookup.
* Returns 0 if no map exists.
*/
static void
remote_pmap_getport(CLIENT *client, struct pmap *parms, u_short *port)
{
if (CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, (xdrproc_t)xdr_pmap,
parms, (xdrproc_t)xdr_u_short, port, tottimeout) != RPC_SUCCESS) {
rpc_createerr.cf_stat = RPC_PMAPFAILURE;
clnt_geterr(client, &rpc_createerr.cf_error);
} else if (*port == 0) {
rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
clnt_geterr(client, &rpc_createerr.cf_error);
}
CLNT_DESTROY(client);
}
static CLIENT *
get_client(struct sockaddr_in *address, int tcp)
{
int sock = -1;
if (tcp)
return clnttcp_create(address, PMAPPROG, PMAPVERS, &sock, 0, 0);
else
return clntudp_bufcreate(address, PMAPPROG, PMAPVERS, timeout,
&sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
}
u_short
pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
u_int protocol)
{
u_short port = 0;
CLIENT *client;
struct pmap parms;
_DIAGASSERT(address != NULL);
parms.pm_prog = program;
parms.pm_vers = version;
parms.pm_prot = protocol;
parms.pm_port = 0; /* not needed or used */
address->sin_port = htons(PMAPPORT);
client = get_client(address, protocol == IPPROTO_TCP);
if (client != NULL)
remote_pmap_getport(client, &parms, &port);
if (port == 0) {
client = get_client(address, protocol != IPPROTO_TCP);
if (client != NULL)
remote_pmap_getport(client, &parms, &port);
}
address->sin_port = 0;
return port;
}
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