private void SendPacketEnvelope(SocketState connection, PacketEnvelope envelope)
{
byte[] sendBuffer = Packetizer.AssembleMessagePacket(envelope, false, null, null);
connection.Socket.Send(sendBuffer, sendBuffer.Length, SocketFlags.None);
}
public static List <PacketEnvelope> DissasemblePacketData(SocketState state, bool encrypt, string encryptPacketKey, string keySalt)
{
List <PacketEnvelope> envelopes = new List <PacketEnvelope>();
try
{
if (state.PayloadBuilderLength + state.BytesReceived >= state.PayloadBuilder.Length)
{
Array.Resize(ref state.PayloadBuilder, state.PayloadBuilderLength + state.BytesReceived);
}
Buffer.BlockCopy(state.Buffer, 0, state.PayloadBuilder, state.PayloadBuilderLength, state.BytesReceived);
state.PayloadBuilderLength = state.PayloadBuilderLength + state.BytesReceived;
while (state.PayloadBuilderLength > Constants.PayloadHeaderSize) //[PayloadSize] and [CRC16]
{
Byte[] payloadDelimiterBytes = new Byte[4];
Byte[] payloadSizeBytes = new Byte[4];
Byte[] expectedCrc16Bytes = new Byte[2];
Buffer.BlockCopy(state.PayloadBuilder, 0, payloadDelimiterBytes, 0, payloadDelimiterBytes.Length);
Buffer.BlockCopy(state.PayloadBuilder, 4, payloadSizeBytes, 0, payloadSizeBytes.Length);
Buffer.BlockCopy(state.PayloadBuilder, 8, expectedCrc16Bytes, 0, expectedCrc16Bytes.Length);
int payloadDelimiter = BitConverter.ToInt32(payloadDelimiterBytes, 0);
int grossPayloadSize = BitConverter.ToInt32(payloadSizeBytes, 0);
UInt16 expectedCrc16 = BitConverter.ToUInt16(expectedCrc16Bytes, 0);
if (payloadDelimiter != Constants.PayloadDelimiter)
{
SkipPacket(ref state);
//throw new Exception("Malformed payload packet, invalid delimiter.");
continue;
}
if (grossPayloadSize < Constants.DefaultMinMsgSize || grossPayloadSize > Constants.DefaultMaxMsgSize)
{
SkipPacket(ref state);
//throw new Exception("Malformed payload packet, invalid length.");
continue;
}
if (state.PayloadBuilderLength < grossPayloadSize)
{
//We have data in the buffer, but it's not enough to make up
// the entire message (fragmented packet) so we will break and wait on more data.
break;
}
UInt16 actualCrc16 = Crc16.ComputeChecksum(state.PayloadBuilder, Constants.PayloadHeaderSize, grossPayloadSize - Constants.PayloadHeaderSize);
if (actualCrc16 != expectedCrc16)
{
SkipPacket(ref state);
//throw new Exception("Malformed payload packet, invalid CRC.");
continue;
}
int netPayloadSize = grossPayloadSize - Constants.PayloadHeaderSize;
byte[] payloadBytes = new byte[netPayloadSize];
Buffer.BlockCopy(state.PayloadBuilder, Constants.PayloadHeaderSize, payloadBytes, 0, netPayloadSize);
if (encrypt)
{
payloadBytes = Decrypt(encryptPacketKey, keySalt, payloadBytes);
}
payloadBytes = Unzip(payloadBytes);
envelopes.Add((PacketEnvelope)Serialization.ByteArrayToObject(payloadBytes));
//Zero out the consumed portion of the payload buffer - more for fun than anything else.
Array.Clear(state.PayloadBuilder, 0, grossPayloadSize);
Buffer.BlockCopy(state.PayloadBuilder, grossPayloadSize, state.PayloadBuilder, 0, state.PayloadBuilderLength - grossPayloadSize);
state.PayloadBuilderLength -= grossPayloadSize;
}
}
catch (Exception ex)
{
//TODO: allow this to be logged.
}
return(envelopes);
}
private void SendPacketEnvelope(SocketState connection, PacketEnvelope envelope, string encryptionKey, string salt)
{
byte[] sendBuffer = Packetizer.AssembleMessagePacket(envelope, true, encryptionKey, salt);
connection.Socket.Send(sendBuffer, sendBuffer.Length, SocketFlags.None);
}