lib/libc/rpc/pmap_rmt.c

   1 /*      $NetBSD: pmap_rmt.c,v 1.34 2013/03/11 20:19:29 tron Exp $       */
   2
   3 /*
   4  * Copyright (c) 2010, Oracle America, Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above
  13  *       copyright notice, this list of conditions and the following
  14  *       disclaimer in the documentation and/or other materials
  15  *       provided with the distribution.
  16  *     * Neither the name of the "Oracle America, Inc." nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  25  *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  27  *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30  *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #if defined(LIBC_SCCS) && !defined(lint)
  36 #if 0
  37 static char *sccsid = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";
  38 static char *sccsid = "@(#)pmap_rmt.c   2.2 88/08/01 4.0 RPCSRC";
  39 #else
  40 __RCSID("$NetBSD: pmap_rmt.c,v 1.34 2013/03/11 20:19:29 tron Exp $");
  41 #endif
  42 #endif
  43
  44 /*
  45  * pmap_rmt.c
  46  * Client interface to pmap rpc service.
  47  * remote call and broadcast service
  48  *
  49  * Copyright (C) 1984, Sun Microsystems, Inc.
  50  */
  51
  52 #include "namespace.h"
  53
  54 #include <sys/types.h>
  55 #include <sys/ioctl.h>
  56 #include <sys/poll.h>
  57 #include <sys/socket.h>
  58
  59 #include <net/if.h>
  60 #include <netinet/in.h>
  61 #include <arpa/inet.h>
  62
  63 #include <assert.h>
  64 #include <err.h>
  65 #include <errno.h>
  66 #include <stdio.h>
  67 #include <string.h>
  68 #include <unistd.h>
  69
  70 #include <rpc/rpc.h>
  71 #include <rpc/pmap_prot.h>
  72 #include <rpc/pmap_clnt.h>
  73 #include <rpc/pmap_rmt.h>
  74
  75 #ifdef __weak_alias
  76 __weak_alias(xdr_rmtcall_args,_xdr_rmtcall_args)
  77 __weak_alias(xdr_rmtcallres,_xdr_rmtcallres)
  78 #endif
  79
  80 static const struct timeval timeout = { 3, 0 };
  81
  82 /*
  83  * pmapper remote-call-service interface.
  84  * This routine is used to call the pmapper remote call service
  85  * which will look up a service program in the port maps, and then
  86  * remotely call that routine with the given parameters.  This allows
  87  * programs to do a lookup and call in one step.
  88 */
  89 enum clnt_stat
  90 pmap_rmtcall(struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
  91     xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
  92     struct timeval tout, u_long *port_ptr)
  93 {
  94         int sock = -1;
  95         CLIENT *client;
  96         struct rmtcallargs a;
  97         struct rmtcallres r;
  98         enum clnt_stat stat;
  99
 100         _DIAGASSERT(addr != NULL);
 101         _DIAGASSERT(port_ptr != NULL);
 102
 103         addr->sin_port = htons(PMAPPORT);
 104         client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
 105         if (client != NULL) {
 106                 a.prog = prog;
 107                 a.vers = vers;
 108                 a.proc = proc;
 109                 a.args_ptr = argsp;
 110                 a.xdr_args = xdrargs;
 111                 r.port_ptr = port_ptr;
 112                 r.results_ptr = resp;
 113                 r.xdr_results = xdrres;
 114                 stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
 115                     (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
 116                     &r, tout);
 117                 CLNT_DESTROY(client);
 118         } else {
 119                 stat = RPC_FAILED;
 120         }
 121         addr->sin_port = 0;
 122         return (stat);
 123 }
 124
 125
 126 /*
 127  * XDR remote call arguments
 128  * written for XDR_ENCODE direction only
 129  */
 130 bool_t
 131 xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
 132 {
 133         u_int lenposition, argposition, position;
 134
 135         _DIAGASSERT(xdrs != NULL);
 136         _DIAGASSERT(cap != NULL);
 137
 138         if (xdr_u_long(xdrs, &(cap->prog)) &&
 139             xdr_u_long(xdrs, &(cap->vers)) &&
 140             xdr_u_long(xdrs, &(cap->proc))) {
 141                 lenposition = XDR_GETPOS(xdrs);
 142                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 143                     return (FALSE);
 144                 argposition = XDR_GETPOS(xdrs);
 145                 if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
 146                     return (FALSE);
 147                 position = XDR_GETPOS(xdrs);
 148                 cap->arglen = (u_long)position - (u_long)argposition;
 149                 XDR_SETPOS(xdrs, lenposition);
 150                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 151                     return (FALSE);
 152                 XDR_SETPOS(xdrs, position);
 153                 return (TRUE);
 154         }
 155         return (FALSE);
 156 }
 157
 158 /*
 159  * XDR remote call results
 160  * written for XDR_DECODE direction only
 161  */
 162 bool_t
 163 xdr_rmtcallres(XDR *xdrs, struct rmtcallres *crp)
 164 {
 165         caddr_t port_ptr;
 166
 167         _DIAGASSERT(xdrs != NULL);
 168         _DIAGASSERT(crp != NULL);
 169
 170         port_ptr = (caddr_t)(void *)crp->port_ptr;
 171         if (xdr_reference(xdrs, &port_ptr, (u_int)sizeof(u_long),
 172             (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
 173                 crp->port_ptr = (u_long *)(void *)port_ptr;
 174                 return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
 175         }
 176         return (FALSE);
 177 }