Sweden-Number/dlls/rpcrt4/rpcss_np_client.c

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/*
* RPCSS named pipe client implementation
*
* Copyright (C) 2002 Greg Turner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <assert.h>
#include "winbase.h"
#include "wine/rpcss_shared.h"
#include "wine/debug.h"
#include "rpc_binding.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
HANDLE RPCRT4_RpcssNPConnect(void)
{
HANDLE the_pipe = NULL;
DWORD dwmode, wait_result;
HANDLE master_mutex = RPCRT4_GetMasterMutex();
TRACE("\n");
while (TRUE) {
wait_result = WaitForSingleObject(master_mutex, MASTER_MUTEX_TIMEOUT);
switch (wait_result) {
case WAIT_ABANDONED:
case WAIT_OBJECT_0:
break;
case WAIT_FAILED:
case WAIT_TIMEOUT:
default:
ERR("This should never happen: couldn't enter mutex.\n");
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return NULL;
}
/* try to open the client side of the named pipe. */
the_pipe = CreateFileA(
NAME_RPCSS_NAMED_PIPE, /* pipe name */
GENERIC_READ | GENERIC_WRITE, /* r/w access */
0, /* no sharing */
NULL, /* no security attributes */
OPEN_EXISTING, /* open an existing pipe */
0, /* default attributes */
NULL /* no template file */
);
if (the_pipe != INVALID_HANDLE_VALUE)
break;
if (GetLastError() != ERROR_PIPE_BUSY) {
WARN("Unable to open named pipe %s (assuming unavailable).\n",
debugstr_a(NAME_RPCSS_NAMED_PIPE));
the_pipe = NULL;
break;
}
WARN("Named pipe busy (will wait)\n");
if (!ReleaseMutex(master_mutex))
ERR("Failed to release master mutex. Expect deadlock.\n");
/* wait for the named pipe. We are only
willing to wait only 5 seconds. It should be available /very/ soon. */
if (! WaitNamedPipeA(NAME_RPCSS_NAMED_PIPE, MASTER_MUTEX_WAITNAMEDPIPE_TIMEOUT))
{
ERR("Named pipe unavailable after waiting. Something is probably wrong.\n");
return NULL;
}
}
if (the_pipe) {
dwmode = PIPE_READMODE_MESSAGE;
/* SetNamedPipeHandleState not implemented ATM, but still seems to work somehow. */
if (! SetNamedPipeHandleState(the_pipe, &dwmode, NULL, NULL))
WARN("Failed to set pipe handle state\n");
}
if (!ReleaseMutex(master_mutex))
ERR("Uh oh, failed to leave the RPC Master Mutex!\n");
return the_pipe;
}
BOOL RPCRT4_SendReceiveNPMsg(HANDLE np, PRPCSS_NP_MESSAGE msg, char *vardata, PRPCSS_NP_REPLY reply)
{
DWORD count;
UINT32 payload_offset;
RPCSS_NP_MESSAGE vardata_payload_msg;
TRACE("(np == %p, msg == %p, vardata == %p, reply == %p)\n",
np, msg, vardata, reply);
if (! WriteFile(np, msg, sizeof(RPCSS_NP_MESSAGE), &count, NULL)) {
ERR("write failed.\n");
return FALSE;
}
if (count != sizeof(RPCSS_NP_MESSAGE)) {
ERR("write count mismatch.\n");
return FALSE;
}
/* process the vardata payload if necessary */
vardata_payload_msg.message_type = RPCSS_NP_MESSAGE_TYPEID_VARDATAPAYLOADMSG;
vardata_payload_msg.vardata_payload_size = 0; /* meaningless */
for ( payload_offset = 0; payload_offset < msg->vardata_payload_size;
payload_offset += VARDATA_PAYLOAD_BYTES ) {
TRACE("sending vardata payload. vd=%p, po=%d, ps=%d\n", vardata,
payload_offset, msg->vardata_payload_size);
ZeroMemory(vardata_payload_msg.message.vardatapayloadmsg.payload, VARDATA_PAYLOAD_BYTES);
CopyMemory(vardata_payload_msg.message.vardatapayloadmsg.payload,
vardata,
min( VARDATA_PAYLOAD_BYTES, msg->vardata_payload_size - payload_offset ));
vardata += VARDATA_PAYLOAD_BYTES;
if (! WriteFile(np, &vardata_payload_msg, sizeof(RPCSS_NP_MESSAGE), &count, NULL)) {
ERR("vardata write failed at %u bytes.\n", payload_offset);
return FALSE;
}
}
if (! ReadFile(np, reply, sizeof(RPCSS_NP_REPLY), &count, NULL)) {
ERR("read failed.\n");
return FALSE;
}
if (count != sizeof(RPCSS_NP_REPLY)) {
ERR("read count mismatch. got %ld, expected %u.\n", count, sizeof(RPCSS_NP_REPLY));
return FALSE;
}
/* message execution was successful */
return TRUE;
}