lib/libc/rpc/pmap_rmt.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_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro
  29  * @(#)pmap_rmt.c       2.2 88/08/01 4.0 RPCSRC
  30  * $NetBSD: pmap_rmt.c,v 1.29 2000/07/06 03:10:34 christos Exp $
  31  * $FreeBSD: src/lib/libc/rpc/pmap_rmt.c,v 1.20 2004/10/16 06:11:35 obrien Exp $
  32  * $DragonFly: src/lib/libc/rpc/pmap_rmt.c,v 1.5 2005/11/13 12:27:04 swildner Exp $
  33  */
  34
  35 /*
  36  * pmap_rmt.c
  37  * Client interface to pmap rpc service.
  38  * remote call and broadcast service
  39  *
  40  * Copyright (C) 1984, Sun Microsystems, Inc.
  41  */
  42
  43 #include "namespace.h"
  44 #include <sys/types.h>
  45 #include <sys/ioctl.h>
  46 #include <sys/poll.h>
  47 #include <sys/socket.h>
  48
  49 #include <net/if.h>
  50 #include <netinet/in.h>
  51 #include <arpa/inet.h>
  52
  53 #include <assert.h>
  54 #include <err.h>
  55 #include <errno.h>
  56 #include <stdio.h>
  57 #include <string.h>
  58 #include <unistd.h>
  59
  60 #include <rpc/rpc.h>
  61 #include <rpc/pmap_prot.h>
  62 #include <rpc/pmap_clnt.h>
  63 #include <rpc/pmap_rmt.h>
  64 #include "un-namespace.h"
  65
  66 static const struct timeval timeout = { 3, 0 };
  67
  68 /*
  69  * pmapper remote-call-service interface.
  70  * This routine is used to call the pmapper remote call service
  71  * which will look up a service program in the port maps, and then
  72  * remotely call that routine with the given parameters.  This allows
  73  * programs to do a lookup and call in one step.
  74 */
  75 enum clnt_stat
  76 pmap_rmtcall(struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
  77              xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
  78              struct timeval tout, u_long *port_ptr)
  79 {
  80         int sock = -1;
  81         CLIENT *client;
  82         struct rmtcallargs a;
  83         struct rmtcallres r;
  84         enum clnt_stat stat;
  85
  86         assert(addr != NULL);
  87         assert(port_ptr != NULL);
  88
  89         addr->sin_port = htons(PMAPPORT);
  90         client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
  91         if (client != NULL) {
  92                 a.prog = prog;
  93                 a.vers = vers;
  94                 a.proc = proc;
  95                 a.args_ptr = argsp;
  96                 a.xdr_args = xdrargs;
  97                 r.port_ptr = port_ptr;
  98                 r.results_ptr = resp;
  99                 r.xdr_results = xdrres;
 100                 stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
 101                     (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
 102                     &r, tout);
 103                 CLNT_DESTROY(client);
 104         } else {
 105                 stat = RPC_FAILED;
 106         }
 107         addr->sin_port = 0;
 108         return (stat);
 109 }
 110
 111
 112 /*
 113  * XDR remote call arguments
 114  * written for XDR_ENCODE direction only
 115  */
 116 bool_t
 117 xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
 118 {
 119         u_int lenposition, argposition, position;
 120
 121         assert(xdrs != NULL);
 122         assert(cap != NULL);
 123
 124         if (xdr_u_long(xdrs, &(cap->prog)) &&
 125             xdr_u_long(xdrs, &(cap->vers)) &&
 126             xdr_u_long(xdrs, &(cap->proc))) {
 127                 lenposition = XDR_GETPOS(xdrs);
 128                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 129                     return (FALSE);
 130                 argposition = XDR_GETPOS(xdrs);
 131                 if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
 132                     return (FALSE);
 133                 position = XDR_GETPOS(xdrs);
 134                 cap->arglen = (u_long)position - (u_long)argposition;
 135                 XDR_SETPOS(xdrs, lenposition);
 136                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 137                     return (FALSE);
 138                 XDR_SETPOS(xdrs, position);
 139                 return (TRUE);
 140         }
 141         return (FALSE);
 142 }
 143
 144 /*
 145  * XDR remote call results
 146  * written for XDR_DECODE direction only
 147  */
 148 bool_t
 149 xdr_rmtcallres(XDR *xdrs, struct rmtcallres *crp)
 150 {
 151         caddr_t port_ptr;
 152
 153         assert(xdrs != NULL);
 154         assert(crp != NULL);
 155
 156         port_ptr = (caddr_t)(void *)crp->port_ptr;
 157         if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
 158             (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
 159                 crp->port_ptr = (u_long *)(void *)port_ptr;
 160                 return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
 161         }
 162         return (FALSE);
 163 }