mirror of https://github.com/FreeRDP/FreeRDP
317 lines
10 KiB
C
317 lines
10 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Virtual Channels
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*
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* Copyright 2011 Vic Lee
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* Copyright 2015 Copyright 2015 Thincast Technologies GmbH
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <freerdp/config.h>
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#include "settings.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <winpr/crt.h>
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#include <winpr/assert.h>
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#include <winpr/stream.h>
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#include <winpr/wtsapi.h>
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#include <freerdp/freerdp.h>
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#include <freerdp/constants.h>
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#include <freerdp/log.h>
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#include <freerdp/svc.h>
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#include <freerdp/peer.h>
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#include <freerdp/addin.h>
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#include <freerdp/client/channels.h>
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#include <freerdp/client/drdynvc.h>
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#include <freerdp/channels/channels.h>
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#include "rdp.h"
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#include "client.h"
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#include "server.h"
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#include "channels.h"
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#define TAG FREERDP_TAG("core.channels")
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BOOL freerdp_channel_send(rdpRdp* rdp, UINT16 channelId, const BYTE* data, size_t size)
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{
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size_t left = 0;
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UINT32 flags = 0;
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size_t chunkSize = 0;
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rdpMcs* mcs = NULL;
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const rdpMcsChannel* channel = NULL;
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WINPR_ASSERT(rdp);
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WINPR_ASSERT(data || (size == 0));
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mcs = rdp->mcs;
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WINPR_ASSERT(mcs);
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for (UINT32 i = 0; i < mcs->channelCount; i++)
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{
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const rdpMcsChannel* cur = &mcs->channels[i];
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if (cur->ChannelId == channelId)
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{
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channel = cur;
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break;
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}
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}
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if (!channel)
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{
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WLog_ERR(TAG, "freerdp_channel_send: unknown channelId %" PRIu16 "", channelId);
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return FALSE;
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}
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flags = CHANNEL_FLAG_FIRST;
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left = size;
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while (left > 0)
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{
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if (left > rdp->settings->VCChunkSize)
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{
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chunkSize = rdp->settings->VCChunkSize;
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}
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else
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{
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chunkSize = left;
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flags |= CHANNEL_FLAG_LAST;
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}
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if (!rdp->settings->ServerMode && (channel->options & CHANNEL_OPTION_SHOW_PROTOCOL))
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{
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flags |= CHANNEL_FLAG_SHOW_PROTOCOL;
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}
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if (!freerdp_channel_send_packet(rdp, channelId, size, flags, data, chunkSize))
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return FALSE;
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data += chunkSize;
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left -= chunkSize;
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flags = 0;
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}
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return TRUE;
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}
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BOOL freerdp_channel_process(freerdp* instance, wStream* s, UINT16 channelId, size_t packetLength)
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{
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BOOL rc = FALSE;
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UINT32 length = 0;
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UINT32 flags = 0;
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size_t chunkLength = 0;
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WINPR_ASSERT(instance);
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if (packetLength < 8)
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{
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WLog_ERR(TAG, "Header length %" PRIdz " bytes promised, none available", packetLength);
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return FALSE;
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}
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packetLength -= 8;
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if (!Stream_CheckAndLogRequiredLength(TAG, s, 8))
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return FALSE;
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/* [MS-RDPBCGR] 3.1.5.2.2 Processing of Virtual Channel PDU
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* chunked data. Length is the total size of the combined data,
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* chunkLength is the actual data received.
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* check chunkLength against packetLength, which is the TPKT header size.
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*/
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Stream_Read_UINT32(s, length);
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Stream_Read_UINT32(s, flags);
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chunkLength = Stream_GetRemainingLength(s);
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if (packetLength != chunkLength)
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{
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WLog_ERR(TAG, "Header length %" PRIdz " != actual length %" PRIdz, packetLength,
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chunkLength);
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return FALSE;
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}
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IFCALLRET(instance->ReceiveChannelData, rc, instance, channelId, Stream_Pointer(s), chunkLength,
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flags, length);
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if (!rc)
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{
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WLog_WARN(TAG, "ReceiveChannelData returned %d", rc);
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return FALSE;
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}
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return Stream_SafeSeek(s, chunkLength);
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}
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BOOL freerdp_channel_peer_process(freerdp_peer* client, wStream* s, UINT16 channelId)
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{
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UINT32 length = 0;
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UINT32 flags = 0;
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size_t chunkLength = 0;
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WINPR_ASSERT(client);
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WINPR_ASSERT(s);
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if (!Stream_CheckAndLogRequiredLength(TAG, s, 8))
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return FALSE;
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Stream_Read_UINT32(s, length);
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Stream_Read_UINT32(s, flags);
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chunkLength = Stream_GetRemainingLength(s);
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if (client->VirtualChannelRead)
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{
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int rc = 0;
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BOOL found = FALSE;
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HANDLE hChannel = 0;
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rdpContext* context = client->context;
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rdpMcs* mcs = context->rdp->mcs;
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for (UINT32 index = 0; index < mcs->channelCount; index++)
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{
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const rdpMcsChannel* mcsChannel = &(mcs->channels[index]);
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if (mcsChannel->ChannelId == channelId)
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{
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hChannel = (HANDLE)mcsChannel->handle;
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found = TRUE;
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break;
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}
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}
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if (!found)
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return FALSE;
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rc = client->VirtualChannelRead(client, hChannel, Stream_Pointer(s), chunkLength);
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if (rc < 0)
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return FALSE;
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}
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else if (client->ReceiveChannelData)
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{
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BOOL rc = client->ReceiveChannelData(client, channelId, Stream_Pointer(s), chunkLength,
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flags, length);
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if (!rc)
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return FALSE;
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}
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if (!Stream_SafeSeek(s, chunkLength))
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{
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WLog_WARN(TAG, "Short PDU, need %" PRIuz " bytes, got %" PRIuz, chunkLength,
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Stream_GetRemainingLength(s));
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return FALSE;
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}
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return TRUE;
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}
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static const WtsApiFunctionTable FreeRDP_WtsApiFunctionTable = {
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0, /* dwVersion */
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0, /* dwFlags */
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FreeRDP_WTSStopRemoteControlSession, /* StopRemoteControlSession */
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FreeRDP_WTSStartRemoteControlSessionW, /* StartRemoteControlSessionW */
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FreeRDP_WTSStartRemoteControlSessionA, /* StartRemoteControlSessionA */
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FreeRDP_WTSConnectSessionW, /* ConnectSessionW */
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FreeRDP_WTSConnectSessionA, /* ConnectSessionA */
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FreeRDP_WTSEnumerateServersW, /* EnumerateServersW */
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FreeRDP_WTSEnumerateServersA, /* EnumerateServersA */
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FreeRDP_WTSOpenServerW, /* OpenServerW */
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FreeRDP_WTSOpenServerA, /* OpenServerA */
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FreeRDP_WTSOpenServerExW, /* OpenServerExW */
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FreeRDP_WTSOpenServerExA, /* OpenServerExA */
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FreeRDP_WTSCloseServer, /* CloseServer */
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FreeRDP_WTSEnumerateSessionsW, /* EnumerateSessionsW */
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FreeRDP_WTSEnumerateSessionsA, /* EnumerateSessionsA */
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FreeRDP_WTSEnumerateSessionsExW, /* EnumerateSessionsExW */
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FreeRDP_WTSEnumerateSessionsExA, /* EnumerateSessionsExA */
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FreeRDP_WTSEnumerateProcessesW, /* EnumerateProcessesW */
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FreeRDP_WTSEnumerateProcessesA, /* EnumerateProcessesA */
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FreeRDP_WTSTerminateProcess, /* TerminateProcess */
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FreeRDP_WTSQuerySessionInformationW, /* QuerySessionInformationW */
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FreeRDP_WTSQuerySessionInformationA, /* QuerySessionInformationA */
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FreeRDP_WTSQueryUserConfigW, /* QueryUserConfigW */
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FreeRDP_WTSQueryUserConfigA, /* QueryUserConfigA */
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FreeRDP_WTSSetUserConfigW, /* SetUserConfigW */
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FreeRDP_WTSSetUserConfigA, /* SetUserConfigA */
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FreeRDP_WTSSendMessageW, /* SendMessageW */
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FreeRDP_WTSSendMessageA, /* SendMessageA */
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FreeRDP_WTSDisconnectSession, /* DisconnectSession */
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FreeRDP_WTSLogoffSession, /* LogoffSession */
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FreeRDP_WTSShutdownSystem, /* ShutdownSystem */
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FreeRDP_WTSWaitSystemEvent, /* WaitSystemEvent */
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FreeRDP_WTSVirtualChannelOpen, /* VirtualChannelOpen */
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FreeRDP_WTSVirtualChannelOpenEx, /* VirtualChannelOpenEx */
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FreeRDP_WTSVirtualChannelClose, /* VirtualChannelClose */
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FreeRDP_WTSVirtualChannelRead, /* VirtualChannelRead */
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FreeRDP_WTSVirtualChannelWrite, /* VirtualChannelWrite */
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FreeRDP_WTSVirtualChannelPurgeInput, /* VirtualChannelPurgeInput */
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FreeRDP_WTSVirtualChannelPurgeOutput, /* VirtualChannelPurgeOutput */
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FreeRDP_WTSVirtualChannelQuery, /* VirtualChannelQuery */
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FreeRDP_WTSFreeMemory, /* FreeMemory */
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FreeRDP_WTSRegisterSessionNotification, /* RegisterSessionNotification */
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FreeRDP_WTSUnRegisterSessionNotification, /* UnRegisterSessionNotification */
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FreeRDP_WTSRegisterSessionNotificationEx, /* RegisterSessionNotificationEx */
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FreeRDP_WTSUnRegisterSessionNotificationEx, /* UnRegisterSessionNotificationEx */
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FreeRDP_WTSQueryUserToken, /* QueryUserToken */
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FreeRDP_WTSFreeMemoryExW, /* FreeMemoryExW */
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FreeRDP_WTSFreeMemoryExA, /* FreeMemoryExA */
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FreeRDP_WTSEnumerateProcessesExW, /* EnumerateProcessesExW */
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FreeRDP_WTSEnumerateProcessesExA, /* EnumerateProcessesExA */
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FreeRDP_WTSEnumerateListenersW, /* EnumerateListenersW */
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FreeRDP_WTSEnumerateListenersA, /* EnumerateListenersA */
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FreeRDP_WTSQueryListenerConfigW, /* QueryListenerConfigW */
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FreeRDP_WTSQueryListenerConfigA, /* QueryListenerConfigA */
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FreeRDP_WTSCreateListenerW, /* CreateListenerW */
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FreeRDP_WTSCreateListenerA, /* CreateListenerA */
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FreeRDP_WTSSetListenerSecurityW, /* SetListenerSecurityW */
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FreeRDP_WTSSetListenerSecurityA, /* SetListenerSecurityA */
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FreeRDP_WTSGetListenerSecurityW, /* GetListenerSecurityW */
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FreeRDP_WTSGetListenerSecurityA, /* GetListenerSecurityA */
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FreeRDP_WTSEnableChildSessions, /* EnableChildSessions */
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FreeRDP_WTSIsChildSessionsEnabled, /* IsChildSessionsEnabled */
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FreeRDP_WTSGetChildSessionId, /* GetChildSessionId */
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FreeRDP_WTSGetActiveConsoleSessionId, /* GetActiveConsoleSessionId */
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FreeRDP_WTSLogonUser,
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FreeRDP_WTSLogoffUser,
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FreeRDP_WTSStartRemoteControlSessionExW,
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FreeRDP_WTSStartRemoteControlSessionExA
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};
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const WtsApiFunctionTable* FreeRDP_InitWtsApi(void)
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{
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return &FreeRDP_WtsApiFunctionTable;
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}
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BOOL freerdp_channel_send_packet(rdpRdp* rdp, UINT16 channelId, size_t totalSize, UINT32 flags,
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const BYTE* data, size_t chunkSize)
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{
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wStream* s = rdp_send_stream_init(rdp);
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if (!s)
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return FALSE;
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Stream_Write_UINT32(s, totalSize);
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Stream_Write_UINT32(s, flags);
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if (!Stream_EnsureCapacity(s, chunkSize))
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{
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Stream_Release(s);
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return FALSE;
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}
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Stream_Write(s, data, chunkSize);
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/* WLog_DBG(TAG, "sending data (flags=0x%x size=%d)", flags, size); */
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return rdp_send(rdp, s, channelId);
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}
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