lib/libc/rpc/pmap_getport.c

   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  * @(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro
  30  * @(#)pmap_getport.c   2.2 88/08/01 4.0 RPCSRC
  31  * $NetBSD: pmap_getport.c,v 1.16 2000/07/06 03:10:34 christos Exp $
  32  * $FreeBSD: src/lib/libc/rpc/pmap_getport.c,v 1.15 2004/10/16 06:11:35 obrien Exp $
  33  * $DragonFly: src/lib/libc/rpc/pmap_getport.c,v 1.6 2005/11/13 12:27:04 swildner Exp $
  34  */
  35
  36 /*
  37  * pmap_getport.c
  38  * Client interface to pmap rpc service.
  39  *
  40  * Copyright (C) 1984, Sun Microsystems, Inc.
  41  */
  42
  43 #include "namespace.h"
  44 #include <sys/types.h>
  45 #include <sys/socket.h>
  46
  47 #include <arpa/inet.h>
  48 #include <net/if.h>
  49
  50 #include <assert.h>
  51 #include <unistd.h>
  52
  53 #include <rpc/rpc.h>
  54 #include <rpc/pmap_prot.h>
  55 #include <rpc/pmap_clnt.h>
  56 #include "un-namespace.h"
  57
  58 static const struct timeval timeout = { 5, 0 };
  59 static const struct timeval tottimeout = { 60, 0 };
  60
  61 /*
  62  * Find the mapped port for program,version.
  63  * Calls the pmap service remotely to do the lookup.
  64  * Returns 0 if no map exists.
  65  */
  66 u_short
  67 pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
  68              u_int protocol)
  69 {
  70         u_short port = 0;
  71         int sock = -1;
  72         CLIENT *client;
  73         struct pmap parms;
  74
  75         assert(address != NULL);
  76
  77         address->sin_port = htons(PMAPPORT);
  78         client = clntudp_bufcreate(address, PMAPPROG,
  79             PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  80         if (client != NULL) {
  81                 parms.pm_prog = program;
  82                 parms.pm_vers = version;
  83                 parms.pm_prot = protocol;
  84                 parms.pm_port = 0;  /* not needed or used */
  85                 if (CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
  86                     (xdrproc_t)xdr_pmap,
  87                     &parms, (xdrproc_t)xdr_u_short, &port, tottimeout) !=
  88                     RPC_SUCCESS){
  89                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
  90                         clnt_geterr(client, &rpc_createerr.cf_error);
  91                 } else if (port == 0) {
  92                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
  93                 }
  94                 CLNT_DESTROY(client);
  95         }
  96         address->sin_port = 0;
  97         return (port);
  98 }