/// <summary>
/// Process a static virtual channel received
/// </summary>
/// <param name="packet"></param>
public override void ReceivePackets(StackPacket packet)
{
if (packet is Virtual_Channel_RAW_Server_Pdu)
{
Virtual_Channel_Complete_Server_Pdu reassembledPacket = ReassembleChunkData(packet as Virtual_Channel_RAW_Server_Pdu);
if (reassembledPacket != null)
{
ProcessSVCData(reassembledPacket.virtualChannelData);
}
}
}
/// <summary>
/// Reassemble static virtual channel PDU
/// </summary>
/// <param name="pdu"></param>
/// <returns></returns>
internal Virtual_Channel_Complete_Server_Pdu ReassembleChunkData(Virtual_Channel_RAW_Server_Pdu pdu)
{
if (pdu == null || pdu.virtualChannelData == null)
{
return(null);
}
// the first chunk
if ((pdu.channelPduHeader.flags & CHANNEL_PDU_HEADER_flags_Values.CHANNEL_FLAG_FIRST)
== CHANNEL_PDU_HEADER_flags_Values.CHANNEL_FLAG_FIRST)
{
completeServerPdu = new Virtual_Channel_Complete_Server_Pdu();
completeServerPdu.rawPdus = new System.Collections.ObjectModel.Collection <Virtual_Channel_RAW_Server_Pdu>();
completeServerPdu.channelId = channelId;
decompressedBuffer.Clear();
}
byte[] decompressedData = pdu.virtualChannelData;
if (mppcDecompressor != null) // has compression
{
CompressMode flag = CompressMode.None;
if ((pdu.channelPduHeader.flags & CHANNEL_PDU_HEADER_flags_Values.CHANNEL_PACKET_AT_FRONT)
== CHANNEL_PDU_HEADER_flags_Values.CHANNEL_PACKET_AT_FRONT)
{
flag |= CompressMode.SetToFront;
}
if ((pdu.channelPduHeader.flags & CHANNEL_PDU_HEADER_flags_Values.CHANNEL_PACKET_COMPRESSED)
== CHANNEL_PDU_HEADER_flags_Values.CHANNEL_PACKET_COMPRESSED)
{
flag |= CompressMode.Compressed;
}
if ((pdu.channelPduHeader.flags & CHANNEL_PDU_HEADER_flags_Values.CHANNEL_PACKET_FLUSHED)
== CHANNEL_PDU_HEADER_flags_Values.CHANNEL_PACKET_FLUSHED)
{
flag |= CompressMode.Flush;
}
if (flag != CompressMode.None)
{
decompressedData = mppcDecompressor.Decompress(pdu.virtualChannelData, flag);
}
}
if (completeServerPdu != null)
{
completeServerPdu.rawPdus.Add(pdu);
decompressedBuffer.AddRange(decompressedData);
}
else
{
// not need to reassemble
Virtual_Channel_Complete_Server_Pdu returnPDU = new Virtual_Channel_Complete_Server_Pdu();
returnPDU.rawPdus = new System.Collections.ObjectModel.Collection <Virtual_Channel_RAW_Server_Pdu>();
returnPDU.channelId = channelId;
returnPDU.rawPdus.Add(pdu);
returnPDU.virtualChannelData = decompressedData;
return(returnPDU);
}
// the last chunk
if ((pdu.channelPduHeader.flags & CHANNEL_PDU_HEADER_flags_Values.CHANNEL_FLAG_LAST)
== CHANNEL_PDU_HEADER_flags_Values.CHANNEL_FLAG_LAST)
{
if (decompressedBuffer != null)
{
completeServerPdu.virtualChannelData = decompressedBuffer.ToArray();
}
Virtual_Channel_Complete_Server_Pdu returnPDU = completeServerPdu;
completeServerPdu = null;
return(returnPDU);
}
return(null);
}
