Sweden-Number/dlls/rpcrt4/rpc_message.c

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/*
* RPC messages
*
* Copyright 2001-2002 Ove K<EFBFBD>ven, TransGaming Technologies
*
* 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
*
* TODO:
* - figure out whether we *really* got this right
* - check for errors and throw exceptions
* - decide if OVERLAPPED_WORKS
*/
#include <stdio.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winreg.h"
#include "rpc.h"
#include "rpcdcep.h"
#include "wine/debug.h"
#include "rpc_binding.h"
#include "rpc_misc.h"
#include "rpc_defs.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
/***********************************************************************
* I_RpcGetBuffer [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
{
RpcBinding* bind = (RpcBinding*)pMsg->Handle;
void* buf;
TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
/* FIXME: pfnAllocate? */
if (bind->server) {
/* it turns out that the original buffer data must still be available
* while the RPC server is marshalling a reply, so we should not deallocate
* it, we'll leave deallocating the original buffer to the RPC server */
buf = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
} else {
buf = HeapReAlloc(GetProcessHeap(), 0, pMsg->Buffer, pMsg->BufferLength);
}
TRACE("Buffer=%p\n", buf);
if (buf) pMsg->Buffer = buf;
/* FIXME: which errors to return? */
return buf ? S_OK : E_OUTOFMEMORY;
}
/***********************************************************************
* I_RpcFreeBuffer [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
{
TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
/* FIXME: pfnFree? */
HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
pMsg->Buffer = NULL;
return S_OK;
}
/***********************************************************************
* I_RpcSend [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
{
RpcBinding* bind = (RpcBinding*)pMsg->Handle;
RpcConnection* conn;
RPC_CLIENT_INTERFACE* cif = NULL;
RPC_SERVER_INTERFACE* sif = NULL;
UUID* obj;
UUID* act;
RPC_STATUS status;
RpcPktHdr hdr;
TRACE("(%p)\n", pMsg);
if (!bind) return RPC_S_INVALID_BINDING;
status = RPCRT4_OpenBinding(bind, &conn);
if (status != RPC_S_OK) return status;
obj = &bind->ObjectUuid;
act = &bind->ActiveUuid;
if (bind->server) {
sif = pMsg->RpcInterfaceInformation;
if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
} else {
cif = pMsg->RpcInterfaceInformation;
if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
}
/* initialize packet header */
memset(&hdr, 0, sizeof(hdr));
hdr.rpc_ver = 4;
hdr.ptype = bind->server
? ((pMsg->RpcFlags & WINE_RPCFLAG_EXCEPTION) ? PKT_FAULT : PKT_RESPONSE)
: PKT_REQUEST;
hdr.object = *obj; /* FIXME: IIRC iff no object, the header structure excludes this elt */
hdr.if_id = (bind->server) ? sif->InterfaceId.SyntaxGUID : cif->InterfaceId.SyntaxGUID;
hdr.if_vers =
(bind->server) ?
MAKELONG(sif->InterfaceId.SyntaxVersion.MinorVersion, sif->InterfaceId.SyntaxVersion.MajorVersion) :
MAKELONG(cif->InterfaceId.SyntaxVersion.MinorVersion, cif->InterfaceId.SyntaxVersion.MajorVersion);
hdr.act_id = *act;
hdr.opnum = pMsg->ProcNum;
/* only the low-order 3 octets of the DataRepresentation go in the header */
hdr.drep[0] = LOBYTE(LOWORD(pMsg->DataRepresentation));
hdr.drep[1] = HIBYTE(LOWORD(pMsg->DataRepresentation));
hdr.drep[2] = LOBYTE(HIWORD(pMsg->DataRepresentation));
hdr.len = pMsg->BufferLength;
/* transmit packet */
if (!WriteFile(conn->conn, &hdr, sizeof(hdr), NULL, NULL)) {
status = GetLastError();
goto fail;
}
if (pMsg->BufferLength && !WriteFile(conn->conn, pMsg->Buffer, pMsg->BufferLength, NULL, NULL)) {
status = GetLastError();
goto fail;
}
/* success */
if (!bind->server) {
/* save the connection, so the response can be read from it */
pMsg->ReservedForRuntime = conn;
return RPC_S_OK;
}
RPCRT4_CloseBinding(bind, conn);
status = RPC_S_OK;
fail:
return status;
}
/***********************************************************************
* I_RpcReceive [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcReceive(PRPC_MESSAGE pMsg)
{
RpcBinding* bind = (RpcBinding*)pMsg->Handle;
RpcConnection* conn;
UUID* act;
RPC_STATUS status;
RpcPktHdr hdr;
DWORD dwRead;
TRACE("(%p)\n", pMsg);
if (!bind) return RPC_S_INVALID_BINDING;
if (pMsg->ReservedForRuntime) {
conn = pMsg->ReservedForRuntime;
pMsg->ReservedForRuntime = NULL;
} else {
status = RPCRT4_OpenBinding(bind, &conn);
if (status != RPC_S_OK) return status;
}
act = &bind->ActiveUuid;
for (;;) {
/* read packet header */
#ifdef OVERLAPPED_WORKS
if (!ReadFile(conn->conn, &hdr, sizeof(hdr), &dwRead, &conn->ovl)) {
DWORD err = GetLastError();
if (err != ERROR_IO_PENDING) {
status = err;
goto fail;
}
if (!GetOverlappedResult(conn->conn, &conn->ovl, &dwRead, TRUE)) {
status = GetLastError();
goto fail;
}
}
#else
if (!ReadFile(conn->conn, &hdr, sizeof(hdr), &dwRead, NULL)) {
status = GetLastError();
goto fail;
}
#endif
if (dwRead != sizeof(hdr)) {
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
/* read packet body */
pMsg->BufferLength = hdr.len;
status = I_RpcGetBuffer(pMsg);
if (status != RPC_S_OK) goto fail;
if (!pMsg->BufferLength) dwRead = 0; else
#ifdef OVERLAPPED_WORKS
if (!ReadFile(conn->conn, pMsg->Buffer, hdr.len, &dwRead, &conn->ovl)) {
DWORD err = GetLastError();
if (err != ERROR_IO_PENDING) {
status = err;
goto fail;
}
if (!GetOverlappedResult(conn->conn, &conn->ovl, &dwRead, TRUE)) {
status = GetLastError();
goto fail;
}
}
#else
if (!ReadFile(conn->conn, pMsg->Buffer, hdr.len, &dwRead, NULL)) {
status = GetLastError();
goto fail;
}
#endif
if (dwRead != hdr.len) {
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
status = RPC_S_PROTOCOL_ERROR;
switch (hdr.ptype) {
case PKT_RESPONSE:
if (bind->server) goto fail;
break;
case PKT_REQUEST:
if (!bind->server) goto fail;
break;
case PKT_FAULT:
pMsg->RpcFlags |= WINE_RPCFLAG_EXCEPTION;
status = RPC_S_CALL_FAILED; /* ? */
goto fail;
default:
goto fail;
}
/* success */
status = RPC_S_OK;
/* FIXME: check destination, etc? */
break;
}
fail:
RPCRT4_CloseBinding(bind, conn);
return status;
}
/***********************************************************************
* I_RpcSendReceive [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcSendReceive(PRPC_MESSAGE pMsg)
{
RPC_STATUS status;
TRACE("(%p)\n", pMsg);
status = I_RpcSend(pMsg);
if (status == RPC_S_OK)
status = I_RpcReceive(pMsg);
return status;
}