lib/libc/rpc/pmap_getport.c

   1 /*-
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * @(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro
  29  * @(#)pmap_getport.c   2.2 88/08/01 4.0 RPCSRC
  30  * $NetBSD: pmap_getport.c,v 1.16 2000/07/06 03:10:34 christos Exp $
  31  * $FreeBSD: src/lib/libc/rpc/pmap_getport.c,v 1.15 2004/10/16 06:11:35 obrien Exp $
  32  * $DragonFly: src/lib/libc/rpc/pmap_getport.c,v 1.6 2005/11/13 12:27:04 swildner Exp $
  33  */
  34
  35 /*
  36  * pmap_getport.c
  37  * Client interface to pmap rpc service.
  38  *
  39  * Copyright (C) 1984, Sun Microsystems, Inc.
  40  */
  41
  42 #include "namespace.h"
  43 #include <sys/types.h>
  44 #include <sys/socket.h>
  45
  46 #include <arpa/inet.h>
  47 #include <net/if.h>
  48
  49 #include <assert.h>
  50 #include <unistd.h>
  51
  52 #include <rpc/rpc.h>
  53 #include <rpc/pmap_prot.h>
  54 #include <rpc/pmap_clnt.h>
  55 #include "un-namespace.h"
  56
  57 static const struct timeval timeout = { 5, 0 };
  58 static const struct timeval tottimeout = { 60, 0 };
  59
  60 /*
  61  * Find the mapped port for program,version.
  62  * Calls the pmap service remotely to do the lookup.
  63  * Returns 0 if no map exists.
  64  */
  65 u_short
  66 pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
  67              u_int protocol)
  68 {
  69         u_short port = 0;
  70         int sock = -1;
  71         CLIENT *client;
  72         struct pmap parms;
  73
  74         assert(address != NULL);
  75
  76         address->sin_port = htons(PMAPPORT);
  77         client = clntudp_bufcreate(address, PMAPPROG,
  78             PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  79         if (client != NULL) {
  80                 parms.pm_prog = program;
  81                 parms.pm_vers = version;
  82                 parms.pm_prot = protocol;
  83                 parms.pm_port = 0;  /* not needed or used */
  84                 if (CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
  85                     (xdrproc_t)xdr_pmap,
  86                     &parms, (xdrproc_t)xdr_u_short, &port, tottimeout) !=
  87                     RPC_SUCCESS){
  88                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
  89                         clnt_geterr(client, &rpc_createerr.cf_error);
  90                 } else if (port == 0) {
  91                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
  92                 }
  93                 CLNT_DESTROY(client);
  94         }
  95         address->sin_port = 0;
  96         return (port);
  97 }