/// <summary>
/// Checks packet integrity.
/// </summary>
/// <param name="data">Packet data.</param>
/// <returns>Returns true if packet is ok; false if not or data is null.</returns>
private bool CheckPacketIntegrity(byte[] data)
{
if (data == null || data.Length < 1)
{
return(false);
}
if (predefinedClientMsgs != null)
{
return(true);
}
int len = PacketLenghts.GetLenght(data[0]);
if (len == PacketLenghts.Dynamic)
{
if (data.Length < 3)
{
return(false);
}
len = ByteConverter.BigEndian.ToUInt16(data, 1);
}
return(data.Length == len);
}
private void ProcessMessages(byte[] data, bool fromServer)
{
byte[] buffer = data;
byte[] partBuffer;
if (fromServer)
{
partBuffer = fromServerBuffer;
}
else
{
partBuffer = fromClientBuffer;
}
// Part message
if (partBuffer != null)
{
buffer = new byte[partBuffer.Length + data.Length];
Array.Copy(partBuffer, buffer, partBuffer.Length);
Array.Copy(data, 0, buffer, partBuffer.Length, data.Length);
partBuffer = null;
}
int offset = 0;
// Separate messages
while (offset < buffer.Length)
{
int msgLen = PacketLenghts.GetLenght(buffer[offset]);
if (!fromServer && predefinedClientMsgs != null)
{
if (clientMsgIndex < predefinedClientMsgs.Length)
{
msgLen = predefinedClientMsgs[clientMsgIndex];
}
else
{
predefinedClientMsgs = null;
}
}
if (msgLen == 0)
{
byte[] msg = new byte[data.Length - offset];
Array.Copy(data, offset, msg, 0, data.Length - offset);
throw new SocketException("Error in communication. Wrong encryption?", this, msg);
}
if (msgLen != PacketLenghts.Dynamic)
{
// Fixed sized packet
partBuffer = ReadPacket(buffer, msgLen, ref offset, fromServer);
}
else
{
// Variable sized packet
if (offset + 3 <= buffer.Length)
{
msgLen = ByteConverter.BigEndian.ToInt16(buffer, offset + 1);
// Now we know size
partBuffer = ReadPacket(buffer, msgLen, ref offset, fromServer);
}
else
{
// Part message does not contain size
int partLen = buffer.Length - offset;
partBuffer = new byte[partLen];
Array.Copy(buffer, offset, partBuffer, 0, partLen);
offset += partLen;
}
}
clientMsgIndex++;
}
if (fromServer)
{
fromServerBuffer = partBuffer;
}
else
{
fromClientBuffer = partBuffer;
}
}