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  * $FreeBSD: src/lib/libc/rpc/pmap_getport.c,v 1.10 2000/01/27 23:06:40 jasone 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 <rpc/rpc.h>
  44 #include <rpc/pmap_prot.h>
  45 #include <rpc/pmap_clnt.h>
  46 #include <sys/socket.h>
  47 #include <net/if.h>
  48 #include <unistd.h>
  49 #include "un-namespace.h"
  50
  51 static struct timeval timeout = { 5, 0 };
  52 static struct timeval tottimeout = { 60, 0 };
  53
  54 /*
  55  * Change the primary pmap_getport() timeout
  56  */
  57 void
  58 pmap_getport_timeout(struct timeval *otv, struct timeval *ntv)
  59 {
  60         if (otv)
  61                 *otv = tottimeout;
  62         if (ntv)
  63                 tottimeout = *ntv;
  64 }
  65
  66 /*
  67  * Find the mapped port for program,version.
  68  * Calls the pmap service remotely to do the lookup.
  69  * Returns 0 if no map exists.
  70  */
  71 u_short
  72 pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
  73              u_int protocol)
  74 {
  75         u_short port = 0;
  76         int socket = -1;
  77         CLIENT *client;
  78         struct pmap parms;
  79
  80         address->sin_port = htons(PMAPPORT);
  81         client = clntudp_bufcreate(address, PMAPPROG,
  82             PMAPVERS, timeout, &socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  83         if (client != (CLIENT *)NULL) {
  84                 parms.pm_prog = program;
  85                 parms.pm_vers = version;
  86                 parms.pm_prot = protocol;
  87                 parms.pm_port = 0;  /* not needed or used */
  88                 if (CLNT_CALL(client, PMAPPROC_GETPORT, xdr_pmap, &parms,
  89                     xdr_u_short, &port, tottimeout) != RPC_SUCCESS){
  90                         rpc_createerr.cf_stat = RPC_PMAPFAILURE;
  91                         clnt_geterr(client, &rpc_createerr.cf_error);
  92                 } else if (port == 0) {
  93                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
  94                 }
  95                 CLNT_DESTROY(client);
  96         }
  97         if (socket != -1)
  98                 _close(socket);
  99         address->sin_port = 0;
 100         return (port);
 101 }