text: /*	$NetBSD: pmap_getport.c,v 1.16 2000/07/06 03:10:34 christos Exp $	*/
  
  /*-
   * Copyright (c) 2009, Sun Microsystems, Inc.
   * All rights reserved.
   *
   * 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 Sun Microsystems, 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.
   */
  
  #if defined(LIBC_SCCS) && !defined(lint)
  static char *sccsid2 = "from: @(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro";
  static char *sccsid = "from: @(#)pmap_getport.c	2.2 88/08/01 4.0 RPCSRC";
  #endif
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/lib/libc/rpc/pmap_getport.c 288113 2015-09-22 15:40:07Z rodrigc $");
  
  /*
   * 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 <arpa/inet.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>
  #include "un-namespace.h"
  
  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.
   */
  u_short
  pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
      u_int protocol)
  {
  	u_short port = 0;
  	int sock = -1;
  	CLIENT *client;
  	struct pmap parms;
  
  	assert(address != NULL);
  
  	address->sin_port = htons(PMAPPORT);
  	client = clntudp_bufcreate(address, PMAPPROG,
  	    PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  	if (client != NULL) {
  		parms.pm_prog = program;
  		parms.pm_vers = version;
  		parms.pm_prot = protocol;
  		parms.pm_port = 0;  /* not needed or used */
  		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_DESTROY(client);
  	}
  	address->sin_port = 0;
  	return (port);
  }
  