/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_capability_request(drdynvcPlugin* drdynvc, int Sp,
int cbChId, wStream* s)
{
UINT status;
if (!drdynvc)
return CHANNEL_RC_BAD_INIT_HANDLE;
if (Stream_GetRemainingLength(s) < 3)
return ERROR_INVALID_DATA;
WLog_Print(drdynvc->log, WLOG_TRACE, "capability_request Sp=%d cbChId=%d", Sp, cbChId);
Stream_Seek(s, 1); /* pad */
Stream_Read_UINT16(s, drdynvc->version);
/* RDP8 servers offer version 3, though Microsoft forgot to document it
* in their early documents. It behaves the same as version 2.
*/
if ((drdynvc->version == 2) || (drdynvc->version == 3))
{
if (Stream_GetRemainingLength(s) < 8)
return ERROR_INVALID_DATA;
Stream_Read_UINT16(s, drdynvc->PriorityCharge0);
Stream_Read_UINT16(s, drdynvc->PriorityCharge1);
Stream_Read_UINT16(s, drdynvc->PriorityCharge2);
Stream_Read_UINT16(s, drdynvc->PriorityCharge3);
}
status = drdynvc_send_capability_response(drdynvc);
drdynvc->state = DRDYNVC_STATE_READY;
return status;
}
static int drdynvc_process_capability_request(drdynvcPlugin* drdynvc, int Sp, int cbChId, wStream* s)
{
int status;
DEBUG_DVC("Sp=%d cbChId=%d", Sp, cbChId);
Stream_Seek(s, 1); /* pad */
Stream_Read_UINT16(s, drdynvc->version);
/* RDP8 servers offer version 3, though Microsoft forgot to document it
* in their early documents. It behaves the same as version 2.
*/
if ((drdynvc->version == 2) || (drdynvc->version == 3))
{
Stream_Read_UINT16(s, drdynvc->PriorityCharge0);
Stream_Read_UINT16(s, drdynvc->PriorityCharge1);
Stream_Read_UINT16(s, drdynvc->PriorityCharge2);
Stream_Read_UINT16(s, drdynvc->PriorityCharge3);
}
status = drdynvc_send_capability_response(drdynvc);
drdynvc->channel_error = status;
drdynvc->state = DRDYNVC_STATE_READY;
return 0;
}
static int drdynvc_process_create_request(drdynvcPlugin* drdynvc, int Sp, int cbChId, wStream* s)
{
int pos;
int status;
UINT32 ChannelId;
wStream* data_out;
int channel_status;
if (drdynvc->state == DRDYNVC_STATE_CAPABILITIES)
{
/**
* For some reason the server does not always send the
* capabilities pdu as it should. When this happens,
* send a capabilities response.
*/
drdynvc->version = 3;
drdynvc_send_capability_response(drdynvc);
drdynvc->state = DRDYNVC_STATE_READY;
}
ChannelId = drdynvc_read_variable_uint(s, cbChId);
pos = Stream_GetPosition(s);
DEBUG_DVC("ChannelId=%d ChannelName=%s", ChannelId, Stream_Pointer(s));
channel_status = dvcman_create_channel(drdynvc->channel_mgr, ChannelId, (char*) Stream_Pointer(s));
data_out = Stream_New(NULL, pos + 4);
Stream_Write_UINT8(data_out, 0x10 | cbChId);
Stream_SetPosition(s, 1);
Stream_Copy(data_out, s, pos - 1);
if (channel_status == 0)
{
DEBUG_DVC("channel created");
Stream_Write_UINT32(data_out, 0);
}
else
{
DEBUG_DVC("no listener");
Stream_Write_UINT32(data_out, (UINT32)(-1));
}
status = svc_plugin_send((rdpSvcPlugin*) drdynvc, data_out);
if (status != CHANNEL_RC_OK)
{
DEBUG_WARN("VirtualChannelWrite failed %d", status);
return 1;
}
if (channel_status == 0)
{
dvcman_open_channel(drdynvc->channel_mgr, ChannelId);
}
return 0;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_create_request(drdynvcPlugin* drdynvc, int Sp,
int cbChId, wStream* s)
{
size_t pos;
UINT status;
UINT32 ChannelId;
wStream* data_out;
UINT channel_status;
char* name;
size_t length;
if (!drdynvc)
return CHANNEL_RC_BAD_CHANNEL_HANDLE;
if (drdynvc->state == DRDYNVC_STATE_CAPABILITIES)
{
/**
* For some reason the server does not always send the
* capabilities pdu as it should. When this happens,
* send a capabilities response.
*/
drdynvc->version = 3;
if ((status = drdynvc_send_capability_response(drdynvc)))
{
WLog_Print(drdynvc->log, WLOG_ERROR, "drdynvc_send_capability_response failed!");
return status;
}
drdynvc->state = DRDYNVC_STATE_READY;
}
if (Stream_GetRemainingLength(s) < drdynvc_cblen_to_bytes(cbChId))
return ERROR_INVALID_DATA;
ChannelId = drdynvc_read_variable_uint(s, cbChId);
pos = Stream_GetPosition(s);
name = (char*)Stream_Pointer(s);
length = Stream_GetRemainingLength(s);
if (strnlen(name, length) >= length)
return ERROR_INVALID_DATA;
WLog_Print(drdynvc->log, WLOG_DEBUG, "process_create_request: ChannelId=%"PRIu32" ChannelName=%s",
ChannelId, name);
channel_status = dvcman_create_channel(drdynvc, drdynvc->channel_mgr, ChannelId, name);
data_out = Stream_New(NULL, pos + 4);
if (!data_out)
{
WLog_Print(drdynvc->log, WLOG_ERROR, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Write_UINT8(data_out, 0x10 | cbChId);
Stream_SetPosition(s, 1);
Stream_Copy(s, data_out, pos - 1);
if (channel_status == CHANNEL_RC_OK)
{
WLog_Print(drdynvc->log, WLOG_DEBUG, "channel created");
Stream_Write_UINT32(data_out, 0);
}
else
{
WLog_Print(drdynvc->log, WLOG_DEBUG, "no listener");
Stream_Write_UINT32(data_out, (UINT32)0xC0000001); /* same code used by mstsc */
}
status = drdynvc_send(drdynvc, data_out);
if (status != CHANNEL_RC_OK)
{
WLog_Print(drdynvc->log, WLOG_ERROR, "VirtualChannelWriteEx failed with %s [%08"PRIX32"]",
WTSErrorToString(status), status);
return status;
}
if (channel_status == CHANNEL_RC_OK)
{
if ((status = dvcman_open_channel(drdynvc, drdynvc->channel_mgr, ChannelId)))
{
WLog_Print(drdynvc->log, WLOG_ERROR, "dvcman_open_channel failed with error %"PRIu32"!", status);
return status;
}
}
else
{
if ((status = dvcman_close_channel(drdynvc->channel_mgr, ChannelId)))
WLog_Print(drdynvc->log, WLOG_ERROR, "dvcman_close_channel failed with error %"PRIu32"!", status);
}
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_create_request(drdynvcPlugin* drdynvc, int Sp,
int cbChId, wStream* s)
{
unsigned long pos;
UINT status;
UINT32 ChannelId;
wStream* data_out;
UINT channel_status;
if (drdynvc->state == DRDYNVC_STATE_CAPABILITIES)
{
/**
* For some reason the server does not always send the
* capabilities pdu as it should. When this happens,
* send a capabilities response.
*/
drdynvc->version = 3;
if ((status = drdynvc_send_capability_response(drdynvc)))
{
WLog_ERR(TAG, "drdynvc_send_capability_response failed!");
return status;
}
drdynvc->state = DRDYNVC_STATE_READY;
}
ChannelId = drdynvc_read_variable_uint(s, cbChId);
pos = Stream_GetPosition(s);
WLog_DBG(TAG, "process_create_request: ChannelId=%d ChannelName=%s", ChannelId, Stream_Pointer(s));
channel_status = dvcman_create_channel(drdynvc->channel_mgr, ChannelId, (char*) Stream_Pointer(s));
data_out = Stream_New(NULL, pos + 4);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Write_UINT8(data_out, 0x10 | cbChId);
Stream_SetPosition(s, 1);
Stream_Copy(s, data_out, pos - 1);
if (channel_status == CHANNEL_RC_OK)
{
WLog_DBG(TAG, "channel created");
Stream_Write_UINT32(data_out, 0);
}
else
{
WLog_DBG(TAG, "no listener");
Stream_Write_UINT32(data_out, (UINT32) 0xC0000001); /* same code used by mstsc */
}
status = drdynvc_send(drdynvc, data_out);
if (status != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "VirtualChannelWrite failed with %s [%08X]",
WTSErrorToString(status), status);
return status;
}
if (channel_status == CHANNEL_RC_OK)
{
if ((status = dvcman_open_channel(drdynvc->channel_mgr, ChannelId)))
{
WLog_ERR(TAG, "dvcman_open_channel failed with error %lu!", status);
return status;
}
}
else
{
if ((status = dvcman_close_channel(drdynvc->channel_mgr, ChannelId)))
WLog_ERR(TAG, "dvcman_close_channel failed with error %lu!", status);
}
return status;
}
