static int rts_recv_flow_control_ack_with_destination_pdu(rdpRpc* rpc, BYTE* buffer, UINT32 length)
{
UINT32 offset;
UINT32 Destination;
UINT32 BytesReceived;
UINT32 AvailableWindow;
BYTE ChannelCookie[16];
/**
* When the sender receives a FlowControlAck RTS PDU, it MUST use the following formula to
* recalculate its Sender AvailableWindow variable:
*
* Sender AvailableWindow = Receiver AvailableWindow_from_ack - (BytesSent - BytesReceived_from_ack)
*
* Where:
*
* Receiver AvailableWindow_from_ack is the Available Window field in the Flow Control
* Acknowledgement Structure (section 2.2.3.4) in the PDU received.
*
* BytesReceived_from_ack is the Bytes Received field in the Flow Control Acknowledgement structure
* in the PDU received.
*
*/
offset = 24;
offset += rts_destination_command_read(rpc, &buffer[offset], length - offset, &Destination) + 4;
offset += rts_flow_control_ack_command_read(rpc, &buffer[offset], length - offset,
&BytesReceived, &AvailableWindow, (BYTE*) &ChannelCookie) + 4;
WLog_DBG(TAG,
"Receiving FlowControlAckWithDestination RTS PDU: BytesReceived: %"PRIu32" AvailableWindow: %"PRIu32"",
BytesReceived, AvailableWindow);
rpc->VirtualConnection->DefaultInChannel->SenderAvailableWindow =
AvailableWindow - (rpc->VirtualConnection->DefaultInChannel->BytesSent - BytesReceived);
return 1;
}
static int rts_recv_flow_control_ack_pdu(rdpRpc* rpc, BYTE* buffer, UINT32 length)
{
UINT32 offset;
UINT32 BytesReceived;
UINT32 AvailableWindow;
BYTE ChannelCookie[16];
offset = 24;
offset += rts_flow_control_ack_command_read(rpc, &buffer[offset], length - offset,
&BytesReceived, &AvailableWindow, (BYTE*) &ChannelCookie) + 4;
WLog_ERR(TAG,
"Receiving FlowControlAck RTS PDU: BytesReceived: %"PRIu32" AvailableWindow: %"PRIu32"",
BytesReceived, AvailableWindow);
rpc->VirtualConnection->DefaultInChannel->SenderAvailableWindow =
AvailableWindow - (rpc->VirtualConnection->DefaultInChannel->BytesSent - BytesReceived);
return 1;
}
int rts_recv_flow_control_ack_with_destination_pdu(rdpRpc* rpc, BYTE* buffer, UINT32 length)
{
UINT32 offset;
UINT32 Destination;
UINT32 BytesReceived;
UINT32 AvailableWindow;
BYTE ChannelCookie[16];
/**
* When the sender receives a FlowControlAck RTS PDU, it MUST use the following formula to
* recalculate its Sender AvailableWindow variable:
*
* Sender AvailableWindow = Receiver AvailableWindow_from_ack - (BytesSent - BytesReceived_from_ack)
*
* Where:
*
* Receiver AvailableWindow_from_ack is the Available Window field in the Flow Control
* Acknowledgement Structure (section 2.2.3.4) in the PDU received.
*
* BytesReceived_from_ack is the Bytes Received field in the Flow Control Acknowledgement structure
* in the PDU received.
*
*/
offset = 24;
offset += rts_destination_command_read(rpc, &buffer[offset], length - offset, &Destination) + 4;
offset += rts_flow_control_ack_command_read(rpc, &buffer[offset], length - offset,
&BytesReceived, &AvailableWindow, (BYTE*) &ChannelCookie) + 4;
#if 0
WLog_ERR(TAG, "Destination: %d BytesReceived: %d AvailableWindow: %d",
Destination, BytesReceived, AvailableWindow);
WLog_ERR(TAG, "ChannelCookie: " RPC_UUID_FORMAT_STRING "", RPC_UUID_FORMAT_ARGUMENTS(ChannelCookie));
#endif
rpc->VirtualConnection->DefaultInChannel->SenderAvailableWindow =
AvailableWindow - (rpc->VirtualConnection->DefaultInChannel->BytesSent - BytesReceived);
return 0;
}
int rts_recv_flow_control_ack_pdu(rdpRpc* rpc, BYTE* buffer, UINT32 length)
{
UINT32 offset;
UINT32 BytesReceived;
UINT32 AvailableWindow;
BYTE ChannelCookie[16];
offset = 24;
offset += rts_flow_control_ack_command_read(rpc, &buffer[offset], length - offset,
&BytesReceived, &AvailableWindow, (BYTE*) &ChannelCookie) + 4;
#if 0
WLog_ERR(TAG, "BytesReceived: %d AvailableWindow: %d",
BytesReceived, AvailableWindow);
WLog_ERR(TAG, "ChannelCookie: " RPC_UUID_FORMAT_STRING "", RPC_UUID_FORMAT_ARGUMENTS(ChannelCookie));
#endif
rpc->VirtualConnection->DefaultInChannel->SenderAvailableWindow =
AvailableWindow - (rpc->VirtualConnection->DefaultInChannel->BytesSent - BytesReceived);
return 0;
}
int rts_recv_pdu_commands(rdpRpc* rpc, RTS_PDU* rts_pdu)
{
int i;
STREAM* s;
UINT32 CommandType;
DEBUG_RTS("numberOfCommands:%d", rts_pdu->header.numberOfCommands);
if (rts_pdu->header.flags & RTS_FLAG_PING)
{
rts_send_keep_alive_pdu(rpc);
return 0;
}
s = stream_new(0);
stream_attach(s, rts_pdu->content, rts_pdu->header.frag_length);
for (i = 0; i < rts_pdu->header.numberOfCommands; i++)
{
stream_read_UINT32(s, CommandType); /* CommandType (4 bytes) */
DEBUG_RTS("CommandType: %s (0x%08X)", RTS_CMD_STRINGS[CommandType % 14], CommandType);
switch (CommandType)
{
case RTS_CMD_RECEIVE_WINDOW_SIZE:
rts_receive_window_size_command_read(rpc, s);
break;
case RTS_CMD_FLOW_CONTROL_ACK:
rts_flow_control_ack_command_read(rpc, s);
break;
case RTS_CMD_CONNECTION_TIMEOUT:
rts_connection_timeout_command_read(rpc, s);
break;
case RTS_CMD_COOKIE:
rts_cookie_command_read(rpc, s);
break;
case RTS_CMD_CHANNEL_LIFETIME:
rts_channel_lifetime_command_read(rpc, s);
break;
case RTS_CMD_CLIENT_KEEPALIVE:
rts_client_keepalive_command_read(rpc, s);
break;
case RTS_CMD_VERSION:
rts_version_command_read(rpc, s);
break;
case RTS_CMD_EMPTY:
rts_empty_command_read(rpc, s);
break;
case RTS_CMD_PADDING:
rts_padding_command_read(rpc, s);
break;
case RTS_CMD_NEGATIVE_ANCE:
rts_negative_ance_command_read(rpc, s);
break;
case RTS_CMD_ANCE:
rts_ance_command_read(rpc, s);
break;
case RTS_CMD_CLIENT_ADDRESS:
rts_client_address_command_read(rpc, s);
break;
case RTS_CMD_ASSOCIATION_GROUP_ID:
rts_association_group_id_command_read(rpc, s);
break;
case RTS_CMD_DESTINATION:
rts_destination_command_read(rpc, s);
break;
case RTS_CMD_PING_TRAFFIC_SENT_NOTIFY:
rts_ping_traffic_sent_notify_command_read(rpc, s);
break;
default:
printf("Error: Unknown RTS Command Type: 0x%x\n", CommandType);
stream_detach(s) ;
stream_free(s) ;
return -1;
break;
}
}
stream_detach(s);
stream_free(s);
return 0;
}
