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channels/remdesk: initial dummy server-side remote assistance message parsing

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This commit is contained in:
Marc-André Moreau 2014-07-15 18:38:32 -04:00
parent 78520d5141
commit f6d1d083e9
6 changed files with 443 additions and 22 deletions
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30
channels/remdesk/client/remdesk_main.c
View File

@ -98,7 +98,7 @@ int remdesk_generate_expert_blob(remdeskPlugin* remdesk)
return 1;
}
int remdesk_read_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
static int remdesk_read_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int status;
UINT32 ChannelNameLen;
@ -133,7 +133,7 @@ int remdesk_read_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
return 1;
}
int remdesk_write_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
static int remdesk_write_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int index;
UINT32 ChannelNameLen;
@ -156,14 +156,14 @@ int remdesk_write_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
return 1;
}
int remdesk_write_ctl_header(wStream* s, REMDESK_CTL_HEADER* ctlHeader)
static int remdesk_write_ctl_header(wStream* s, REMDESK_CTL_HEADER* ctlHeader)
{
remdesk_write_channel_header(s, (REMDESK_CHANNEL_HEADER*) ctlHeader);
Stream_Write_UINT32(s, ctlHeader->msgType); /* msgType (4 bytes) */
return 1;
}
int remdesk_prepare_ctl_header(REMDESK_CTL_HEADER* ctlHeader, UINT32 msgType, UINT32 msgSize)
static int remdesk_prepare_ctl_header(REMDESK_CTL_HEADER* ctlHeader, UINT32 msgType, UINT32 msgSize)
{
ctlHeader->msgType = msgType;
strcpy(ctlHeader->ChannelName, REMDESK_CHANNEL_CTL_NAME);
@ -171,12 +171,12 @@ int remdesk_prepare_ctl_header(REMDESK_CTL_HEADER* ctlHeader, UINT32 msgType, UI
return 1;
}
int remdesk_recv_ctl_server_announce_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header)
static int remdesk_recv_ctl_server_announce_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
return 1;
}
int remdesk_recv_ctl_version_info_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header)
static int remdesk_recv_ctl_version_info_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
UINT32 versionMajor;
UINT32 versionMinor;
@ -190,7 +190,7 @@ int remdesk_recv_ctl_version_info_pdu(remdeskPlugin* remdesk, wStream* s, REMDES
return 1;
}
int remdesk_send_ctl_version_info_pdu(remdeskPlugin* remdesk)
static int remdesk_send_ctl_version_info_pdu(remdeskPlugin* remdesk)
{
wStream* s;
REMDESK_CTL_VERSION_INFO_PDU pdu;
@ -214,7 +214,7 @@ int remdesk_send_ctl_version_info_pdu(remdeskPlugin* remdesk)
return 1;
}
int remdesk_recv_result_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header, UINT32 *pResult)
static int remdesk_recv_ctl_result_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header, UINT32 *pResult)
{
UINT32 result;
@ -230,7 +230,7 @@ int remdesk_recv_result_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_
return 1;
}
int remdesk_send_ctl_authenticate_pdu(remdeskPlugin* remdesk)
static int remdesk_send_ctl_authenticate_pdu(remdeskPlugin* remdesk)
{
int status;
wStream* s;
@ -282,7 +282,7 @@ int remdesk_send_ctl_authenticate_pdu(remdeskPlugin* remdesk)
return 1;
}
int remdesk_send_ctl_remote_control_desktop_pdu(remdeskPlugin* remdesk)
static int remdesk_send_ctl_remote_control_desktop_pdu(remdeskPlugin* remdesk)
{
int status;
wStream* s;
@ -316,7 +316,7 @@ int remdesk_send_ctl_remote_control_desktop_pdu(remdeskPlugin* remdesk)
return 1;
}
int remdesk_send_ctl_verify_password_pdu(remdeskPlugin* remdesk)
static int remdesk_send_ctl_verify_password_pdu(remdeskPlugin* remdesk)
{
int status;
wStream* s;
@ -355,7 +355,7 @@ int remdesk_send_ctl_verify_password_pdu(remdeskPlugin* remdesk)
return 1;
}
int remdesk_send_ctl_expert_on_vista_pdu(remdeskPlugin* remdesk)
static int remdesk_send_ctl_expert_on_vista_pdu(remdeskPlugin* remdesk)
{
int status;
wStream* s;
@ -385,7 +385,7 @@ int remdesk_send_ctl_expert_on_vista_pdu(remdeskPlugin* remdesk)
return 1;
}
int remdesk_recv_ctl_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header)
static int remdesk_recv_ctl_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int status = 1;
UINT32 msgType = 0;
@ -404,7 +404,7 @@ int remdesk_recv_ctl_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEA
break;
case REMDESK_CTL_RESULT:
status = remdesk_recv_result_pdu(remdesk, s, header, &result);
status = remdesk_recv_ctl_result_pdu(remdesk, s, header, &result);
break;
case REMDESK_CTL_AUTHENTICATE:
@ -469,7 +469,7 @@ int remdesk_recv_ctl_pdu(remdeskPlugin* remdesk, wStream* s, REMDESK_CHANNEL_HEA
return status;
}
int remdesk_process_receive(remdeskPlugin* remdesk, wStream* s)
static int remdesk_process_receive(remdeskPlugin* remdesk, wStream* s)
{
int status = 1;
REMDESK_CHANNEL_HEADER header;

405
channels/remdesk/server/remdesk_main.c
View File

@ -27,9 +27,391 @@
#include "remdesk_main.h"
int remdesk_virtual_channel_write(RemdeskServerContext* context, wStream* s)
{
BOOL status;
ULONG BytesWritten = 0;
status = WTSVirtualChannelWrite(context->priv->ChannelHandle,
(PCHAR) Stream_Buffer(s), Stream_Length(s), &BytesWritten);
return (status) ? 1 : -1;
}
static int remdesk_read_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int status;
UINT32 ChannelNameLen;
char* pChannelName = NULL;
if (Stream_GetRemainingLength(s) < 8)
return -1;
Stream_Read_UINT32(s, ChannelNameLen); /* ChannelNameLen (4 bytes) */
Stream_Read_UINT32(s, header->DataLength); /* DataLen (4 bytes) */
if (ChannelNameLen > 64)
return -1;
if ((ChannelNameLen % 2) != 0)
return -1;
if (Stream_GetRemainingLength(s) < ChannelNameLen)
return -1;
ZeroMemory(header->ChannelName, sizeof(header->ChannelName));
pChannelName = (char*) header->ChannelName;
status = ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s),
ChannelNameLen / 2, &pChannelName, 32, NULL, NULL);
Stream_Seek(s, ChannelNameLen);
if (status <= 0)
return -1;
return 1;
}
static int remdesk_write_channel_header(wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int index;
UINT32 ChannelNameLen;
WCHAR ChannelNameW[32];
ZeroMemory(ChannelNameW, sizeof(ChannelNameW));
for (index = 0; index < 32; index++)
{
ChannelNameW[index] = (WCHAR) header->ChannelName[index];
}
ChannelNameLen = (strlen(header->ChannelName) + 1) * 2;
Stream_Write_UINT32(s, ChannelNameLen); /* ChannelNameLen (4 bytes) */
Stream_Write_UINT32(s, header->DataLength); /* DataLen (4 bytes) */
Stream_Write(s, ChannelNameW, ChannelNameLen); /* ChannelName (variable) */
return 1;
}
static int remdesk_write_ctl_header(wStream* s, REMDESK_CTL_HEADER* ctlHeader)
{
remdesk_write_channel_header(s, (REMDESK_CHANNEL_HEADER*) ctlHeader);
Stream_Write_UINT32(s, ctlHeader->msgType); /* msgType (4 bytes) */
return 1;
}
static int remdesk_prepare_ctl_header(REMDESK_CTL_HEADER* ctlHeader, UINT32 msgType, UINT32 msgSize)
{
ctlHeader->msgType = msgType;
strcpy(ctlHeader->ChannelName, REMDESK_CHANNEL_CTL_NAME);
ctlHeader->DataLength = 4 + msgSize;
return 1;
}
static int remdesk_send_ctl_result_pdu(RemdeskServerContext* context, UINT32 result)
{
wStream* s;
REMDESK_CTL_RESULT_PDU pdu;
pdu.result = result;
remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_RESULT, 4);
s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.DataLength);
remdesk_write_ctl_header(s, &(pdu.ctlHeader));
Stream_Write_UINT32(s, pdu.result); /* result (4 bytes) */
Stream_SealLength(s);
remdesk_virtual_channel_write(context, s);
Stream_Free(s, TRUE);
return 1;
}
static int remdesk_send_ctl_version_info_pdu(RemdeskServerContext* context)
{
wStream* s;
REMDESK_CTL_VERSION_INFO_PDU pdu;
remdesk_prepare_ctl_header(&(pdu.ctlHeader), REMDESK_CTL_VERSIONINFO, 8);
pdu.versionMajor = 1;
pdu.versionMinor = 2;
s = Stream_New(NULL, REMDESK_CHANNEL_CTL_SIZE + pdu.ctlHeader.DataLength);
remdesk_write_ctl_header(s, &(pdu.ctlHeader));
Stream_Write_UINT32(s, pdu.versionMajor); /* versionMajor (4 bytes) */
Stream_Write_UINT32(s, pdu.versionMinor); /* versionMinor (4 bytes) */
Stream_SealLength(s);
remdesk_virtual_channel_write(context, s);
return 1;
}
static int remdesk_recv_ctl_version_info_pdu(RemdeskServerContext* context, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
UINT32 versionMajor;
UINT32 versionMinor;
if (Stream_GetRemainingLength(s) < 8)
return -1;
Stream_Read_UINT32(s, versionMajor); /* versionMajor (4 bytes) */
Stream_Read_UINT32(s, versionMinor); /* versionMinor (4 bytes) */
return 1;
}
static int remdesk_recv_ctl_remote_control_desktop_pdu(RemdeskServerContext* context, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int status;
int cchStringW;
WCHAR* pStringW;
UINT32 msgLength;
int cbRaConnectionStringW = 0;
WCHAR* raConnectionStringW = NULL;
REMDESK_CTL_REMOTE_CONTROL_DESKTOP_PDU pdu;
msgLength = header->DataLength - 4;
pStringW = (WCHAR*) Stream_Pointer(s);
raConnectionStringW = pStringW;
cchStringW = 0;
while ((msgLength > 0) && pStringW[cchStringW])
{
msgLength -= 2;
cchStringW++;
}
if (pStringW[cchStringW] || !cchStringW)
return -1;
cchStringW++;
cbRaConnectionStringW = cchStringW * 2;
pdu.raConnectionString = NULL;
status = ConvertFromUnicode(CP_UTF8, 0, raConnectionStringW,
cbRaConnectionStringW / 2, &pdu.raConnectionString, 0, NULL, NULL);
if (status <= 0)
return -1;
printf("RaConnectionString: %s\n",
pdu.raConnectionString);
free(pdu.raConnectionString);
remdesk_send_ctl_result_pdu(context, 0);
return 1;
}
static int remdesk_recv_ctl_authenticate_pdu(RemdeskServerContext* context, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int status;
int cchStringW;
WCHAR* pStringW;
UINT32 msgLength;
int cbExpertBlobW = 0;
WCHAR* expertBlobW = NULL;
int cbRaConnectionStringW = 0;
WCHAR* raConnectionStringW = NULL;
REMDESK_CTL_AUTHENTICATE_PDU pdu;
msgLength = header->DataLength - 4;
pStringW = (WCHAR*) Stream_Pointer(s);
raConnectionStringW = pStringW;
cchStringW = 0;
while ((msgLength > 0) && pStringW[cchStringW])
{
msgLength -= 2;
cchStringW++;
}
if (pStringW[cchStringW] || !cchStringW)
return -1;
cchStringW++;
cbRaConnectionStringW = cchStringW * 2;
pStringW += cchStringW;
expertBlobW = pStringW;
cchStringW = 0;
while ((msgLength > 0) && pStringW[cchStringW])
{
msgLength -= 2;
cchStringW++;
}
if (pStringW[cchStringW] || !cchStringW)
return -1;
cchStringW++;
cbExpertBlobW = cchStringW * 2;
pdu.raConnectionString = NULL;
status = ConvertFromUnicode(CP_UTF8, 0, raConnectionStringW,
cbRaConnectionStringW / 2, &pdu.raConnectionString, 0, NULL, NULL);
if (status <= 0)
return -1;
pdu.expertBlob = NULL;
status = ConvertFromUnicode(CP_UTF8, 0, expertBlobW,
cbExpertBlobW / 2, &pdu.expertBlob, 0, NULL, NULL);
if (status <= 0)
return -1;
printf("RaConnectionString: %s ExpertBlob: %s\n",
pdu.raConnectionString, pdu.expertBlob);
free(pdu.raConnectionString);
free(pdu.expertBlob);
return 1;
}
static int remdesk_recv_ctl_verify_password_pdu(RemdeskServerContext* context, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int status;
int cbExpertBlobW = 0;
WCHAR* expertBlobW = NULL;
REMDESK_CTL_VERIFY_PASSWORD_PDU pdu;
if (Stream_GetRemainingLength(s) < 8)
return -1;
pdu.expertBlob = NULL;
expertBlobW = (WCHAR*) Stream_Pointer(s);
cbExpertBlobW = header->DataLength - 4;
status = ConvertFromUnicode(CP_UTF8, 0, expertBlobW, cbExpertBlobW / 2, &pdu.expertBlob, 0, NULL, NULL);
printf("ExpertBlob: %s\n", pdu.expertBlob);
remdesk_send_ctl_result_pdu(context, 0);
return 1;
}
static int remdesk_recv_ctl_pdu(RemdeskServerContext* context, wStream* s, REMDESK_CHANNEL_HEADER* header)
{
int status = 1;
UINT32 msgType = 0;
if (Stream_GetRemainingLength(s) < 4)
return -1;
Stream_Read_UINT32(s, msgType); /* msgType (4 bytes) */
printf("msgType: %d\n", msgType);
switch (msgType)
{
case REMDESK_CTL_REMOTE_CONTROL_DESKTOP:
status = remdesk_recv_ctl_remote_control_desktop_pdu(context, s, header);
break;
case REMDESK_CTL_AUTHENTICATE:
status = remdesk_recv_ctl_authenticate_pdu(context, s, header);
break;
case REMDESK_CTL_DISCONNECT:
break;
case REMDESK_CTL_VERSIONINFO:
status = remdesk_recv_ctl_version_info_pdu(context, s, header);
break;
case REMDESK_CTL_ISCONNECTED:
break;
case REMDESK_CTL_VERIFY_PASSWORD:
status = remdesk_recv_ctl_verify_password_pdu(context, s, header);
break;
case REMDESK_CTL_EXPERT_ON_VISTA:
break;
case REMDESK_CTL_RANOVICE_NAME:
break;
case REMDESK_CTL_RAEXPERT_NAME:
break;
case REMDESK_CTL_TOKEN:
break;
default:
fprintf(stderr, "remdesk_recv_control_pdu: unknown msgType: %d\n", msgType);
status = -1;
break;
}
return status;
}
static int remdesk_server_receive_pdu(RemdeskServerContext* context, wStream* s)
{
return 0;
int status = 1;
REMDESK_CHANNEL_HEADER header;
#if 0
printf("RemdeskReceive: %d\n", Stream_GetRemainingLength(s));
winpr_HexDump(Stream_Pointer(s), Stream_GetRemainingLength(s));
#endif
remdesk_read_channel_header(s, &header);
if (strcmp(header.ChannelName, "RC_CTL") == 0)
{
status = remdesk_recv_ctl_pdu(context, s, &header);
}
else if (strcmp(header.ChannelName, "70") == 0)
{
}
else if (strcmp(header.ChannelName, "71") == 0)
{
}
else if (strcmp(header.ChannelName, ".") == 0)
{
}
else if (strcmp(header.ChannelName, "1000.") == 0)
{
}
else if (strcmp(header.ChannelName, "RA_FX") == 0)
{
}
else
{
}
return 1;
}
static void* remdesk_server_thread(void* arg)
@ -38,6 +420,8 @@ static void* remdesk_server_thread(void* arg)
DWORD status;
DWORD nCount;
void* buffer;
UINT32* pHeader;
UINT32 PduLength;
HANDLE events[8];
HANDLE ChannelEvent;
DWORD BytesReturned;
@ -63,6 +447,8 @@ static void* remdesk_server_thread(void* arg)
events[nCount++] = ChannelEvent;
events[nCount++] = context->priv->StopEvent;
remdesk_send_ctl_version_info_pdu(context);
while (1)
{
status = WaitForMultipleObjects(nCount, events, FALSE, INFINITE);
@ -83,9 +469,18 @@ static void* remdesk_server_thread(void* arg)
Stream_EnsureRemainingCapacity(s, BytesReturned);
}
if (0)
if (Stream_GetPosition(s) >= 8)
{
pHeader = (UINT32*) Stream_Buffer(s);
PduLength = pHeader[0] + pHeader[1] + 8;
if (PduLength >= Stream_GetPosition(s))
{
Stream_SealLength(s);
Stream_SetPosition(s, 0);
remdesk_server_receive_pdu(context, s);
Stream_SetPosition(s, 0);
}
}
}
@ -106,7 +501,7 @@ static int remdesk_server_start(RemdeskServerContext* context)
context->priv->Thread = CreateThread(NULL, 0,
(LPTHREAD_START_ROUTINE) remdesk_server_thread, (void*) context, 0, NULL);
return 0;
return 1;
}
static int remdesk_server_stop(RemdeskServerContext* context)
@ -116,7 +511,7 @@ static int remdesk_server_stop(RemdeskServerContext* context)
WaitForSingleObject(context->priv->Thread, INFINITE);
CloseHandle(context->priv->Thread);
return 0;
return 1;
}
RemdeskServerContext* remdesk_server_context_new(HANDLE vcm)
@ -136,7 +531,7 @@ RemdeskServerContext* remdesk_server_context_new(HANDLE vcm)
if (context->priv)
{
context->priv->Version = 1;
}
}

2
channels/remdesk/server/remdesk_main.h
View File

@ -31,6 +31,8 @@ struct _remdesk_server_private
HANDLE Thread;
HANDLE StopEvent;
void* ChannelHandle;
UINT32 Version;
};
#endif /* FREERDP_CHANNEL_SERVER_REMDESK_MAIN_H */

8
include/freerdp/channels/remdesk.h
View File

@ -57,6 +57,14 @@ typedef struct _REMDESK_CTL_HEADER REMDESK_CTL_HEADER;
#define REMDESK_CTL_RAEXPERT_NAME 11
#define REMDESK_CTL_TOKEN 12
struct _REMDESK_CTL_RESULT_PDU
{
REMDESK_CTL_HEADER ctlHeader;
UINT32 result;
};
typedef struct _REMDESK_CTL_RESULT_PDU REMDESK_CTL_RESULT_PDU;
struct _REMDESK_CTL_VERSION_INFO_PDU
{
REMDESK_CTL_HEADER ctlHeader;

12
server/shadow/shadow_client.c
View File

@ -600,6 +600,7 @@ void* shadow_client_thread(rdpShadowClient* client)
HANDLE events[32];
HANDLE StopEvent;
HANDLE ClientEvent;
HANDLE ChannelEvent;
freerdp_peer* peer;
rdpSettings* settings;
rdpShadowServer* server;
@ -633,12 +634,14 @@ void* shadow_client_thread(rdpShadowClient* client)
StopEvent = client->StopEvent;
ClientEvent = peer->GetEventHandle(peer);
ChannelEvent = WTSVirtualChannelManagerGetEventHandle(client->vcm);
while (1)
{
nCount = 0;
events[nCount++] = StopEvent;
events[nCount++] = ClientEvent;
events[nCount++] = ChannelEvent;
cTime = GetTickCount64();
dwTimeout = (cTime > frameTime) ? 0 : frameTime - cTime;
@ -659,6 +662,15 @@ void* shadow_client_thread(rdpShadowClient* client)
}
}
if (WaitForSingleObject(ChannelEvent, 0) == WAIT_OBJECT_0)
{
if (WTSVirtualChannelManagerCheckFileDescriptor(client->vcm) != TRUE)
{
fprintf(stderr, "WTSVirtualChannelManagerCheckFileDescriptor failure\n");
break;
}
}
if ((status == WAIT_TIMEOUT) || (GetTickCount64() > frameTime))
{
if (client->activated)

6
server/shadow/shadow_remdesk.c
View File

@ -26,7 +26,11 @@
int shadow_client_remdesk_init(rdpShadowClient* client)
{
client->remdesk = remdesk_server_context_new(client->vcm);
RemdeskServerContext* remdesk;
remdesk = client->remdesk = remdesk_server_context_new(client->vcm);
remdesk->custom = (void*) client;
if (client->remdesk)
client->remdesk->Start(client->remdesk);