public CompressDataToRdp8BulkEncodedData ( byte data, PACKET_COMPR_FLAG compressedFlag ) : byte[] | ||
data | byte | |
compressedFlag | PACKET_COMPR_FLAG | |
return | byte[] |
private void SendFirstCompressedDataPdu(uint channelId, byte[] data, DynamicVC_TransportType transport, uint?dataLength = null) { //According to section 3.1.5.1.4 of MS-RDPEDYC, //If the total uncompressed length of the message exceeds 1,590 bytes, //the DYNVC_DATA_FIRST_COMPRESSED (section 2.2.3.3) PDU is sent as the first data PDU, //followed by DYNVC_DATA_COMPRESSED (section 2.2.3.4) PDUs until all the data has been sent. if (data.Length <= ConstLength.MAX_UNCOMPRESSED_DATA_LENGTH) { byte[] compressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(data, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DataFirstCompressedDvcPdu firstCompressedPdu = new DataFirstCompressedDvcPdu(channelId, (uint)data.Length, compressedData); firstCompressedPdu.GetNonDataSize(); Send(firstCompressedPdu, transport); } else { //Cmd:4 bits, Len: 2 bits, cbChid:2 bits, ChannelId: 8 bit, Length: no more than 1600, so it it 16 bits. Totally, 4 bytes // Descriptor is 1 byte, Header is 1 byte //So the max length of the data should be 1600 (Max Chunk Length)-6 byte[] uncompressedData = new byte[ConstLength.MAX_FIRST_COMPRESSED_DATA_LENGTH]; Array.Copy(data, uncompressedData, ConstLength.MAX_FIRST_COMPRESSED_DATA_LENGTH); byte[] compressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(uncompressedData, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DataFirstCompressedDvcPdu firstCompressedPdu = new DataFirstCompressedDvcPdu(channelId, (uint)data.Length, compressedData); firstCompressedPdu.GetNonDataSize(); Send(firstCompressedPdu, transport); int leftBytes = uncompressedData.Length - (int)ConstLength.MAX_FIRST_COMPRESSED_DATA_LENGTH; int followingMsgCount = 0; if (leftBytes > 0) { int followingLen = data.Length - (int)ConstLength.MAX_FIRST_COMPRESSED_DATA_LENGTH; followingMsgCount = (followingLen / (int)ConstLength.MAX_COMPRESSED_DATA_LENGTH); followingMsgCount = (followingLen % (int)ConstLength.MAX_COMPRESSED_DATA_LENGTH == 0) ? followingMsgCount : ++followingMsgCount; for (int i = 0; i < followingMsgCount; i++) { if (i != followingMsgCount) { byte[] followingUnCompressedData = new byte[ConstLength.MAX_COMPRESSED_DATA_LENGTH]; Array.Copy(data, i * ConstLength.MAX_COMPRESSED_DATA_LENGTH + ConstLength.MAX_FIRST_COMPRESSED_DATA_LENGTH, followingUnCompressedData, 0, ConstLength.MAX_COMPRESSED_DATA_LENGTH); byte[] followingCompressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(followingUnCompressedData, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DynamicVCPDU followingCompressedPDU = pduBuilder.CreateDataCompressedReqPdu(channelId, followingCompressedData); Send(followingCompressedPDU, transport); } else //Last message { byte[] lastUnCompressedData = new byte[data.Length - i * ConstLength.MAX_COMPRESSED_DATA_LENGTH]; Array.Copy(data, i * ConstLength.MAX_COMPRESSED_DATA_LENGTH + ConstLength.MAX_FIRST_COMPRESSED_DATA_LENGTH, lastUnCompressedData, 0, followingLen - i * ConstLength.MAX_COMPRESSED_DATA_LENGTH); byte[] lastCompressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(lastUnCompressedData, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DynamicVCPDU followingPdu = pduBuilder.CreateDataCompressedReqPdu(channelId, lastCompressedData); Send(followingPdu, transport); } } } } }
public void SendFirstCompressedDataPdu(uint channelId, byte[] data) { if (data.Length < 1599 - 4)//Cmd:4 bits, Len: 2 bits, cbChid:2 bits, ChannelId: 8 bit, Length: no more than 1599, so it it 16 bits. Totally, 4 bytes { byte[] compressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(data, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DataFirstCompressedDvcPdu firstCompressedPdu = new DataFirstCompressedDvcPdu(channelId, (uint)data.Length, compressedData); firstCompressedPdu.GetNonDataSize(); Send(firstCompressedPdu, DynamicVC_TransportType.RDP_UDP_Reliable); } else { //Cmd:4 bits, Len: 2 bits, cbChid:2 bits, ChannelId: 8 bit, Length: no more than 1599, so it it 16 bits. Totally, 4 bytes //So the max length of the data should be 1599-4 byte[] uncompressedData = new byte[1595]; Array.Copy(data, uncompressedData, 1599 - 4); byte[] compressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(uncompressedData, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DataFirstCompressedDvcPdu firstCompressedPdu = new DataFirstCompressedDvcPdu(channelId, (uint)data.Length, compressedData); firstCompressedPdu.GetNonDataSize(); Send(firstCompressedPdu, DynamicVC_TransportType.RDP_UDP_Reliable); int leftBytes = uncompressedData.Length % 1595; int followingMsgCount = 0; if (leftBytes > 0) { followingMsgCount = data.Length / 1595 + 1 - 1; //minus the FirstCompressedData for (int i = 0; i < followingMsgCount; i++) { if (i != followingMsgCount) { byte[] followingUnCompressedData = new byte[1595]; Array.Copy(data, i * 1595, followingUnCompressedData, 0, 1595); byte[] followingCompressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(followingUnCompressedData, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DynamicVCPDU followingCompressedPDU = pduBuilder.CreateDataCompressedReqPdu(channelId, followingCompressedData); Send(followingCompressedPDU, DynamicVC_TransportType.RDP_UDP_Reliable); } else //Last message { byte[] lastUnCompressedData = new byte[data.Length - i * 1595]; Array.Copy(data, i * 1595, lastUnCompressedData, 0, data.Length - i * 1595); byte[] lastCompressedData = pduBuilder.CompressDataToRdp8BulkEncodedData(lastUnCompressedData, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED); DynamicVCPDU followingPdu = pduBuilder.CreateDataCompressedReqPdu(channelId, lastCompressedData); Send(followingPdu, DynamicVC_TransportType.RDP_UDP_Reliable); } } } } }
public void SendFirstCompressedData(byte[] data) { DataDvcBasePdu[] dataPdus = null; dataPdus = pduBuilder.CreateCompressedDataPdu( channelId, pduBuilder.CompressDataToRdp8BulkEncodedData(data, PACKET_COMPR_FLAG.PACKET_COMPR_TYPE_LITE | PACKET_COMPR_FLAG.PACKET_COMPRESSED)); if (dataPdus != null) { foreach (DataDvcBasePdu pdu in dataPdus) { transport.Send(pdu); } } }