protected virtual void ParseHeader(IAsyncResult ar)
{
if (!EndRead(ar))
{
return;
}
uint recvChecksum = InMessage.GetUInt32(); //Adler Checksum
uint checksum = Tools.AdlerChecksum(InMessage.Buffer, InMessage.Position, InMessage.Length - 6);
if (checksum != recvChecksum)
{
InMessage.SkipBytes(-4);
}
if (!IsFirstMessageReceived)
{
IsFirstMessageReceived = true;
ProcessFirstMessage(checksum == recvChecksum);
}
else
{
if (IsEncryptionEnabled && !InMessage.XteaDecrypt(XteaKey))
{
return;
}
ProcessMessage();
}
}
protected override void ProcessFirstMessage(bool isChecksummed)
{
if (!isChecksummed)
{
ProcessStatusMessage();
return;
}
InMessage.GetByte(); //Protocol Id
InMessage.GetUInt16(); //Client OS
Version = InMessage.GetUInt16(); //Client Version
if (Version < Constants.ClientVersionMin || Version > Constants.ClientVersionMax)
{
Disconnect("Only clients with protocol " + Constants.ClientVersionStr + " allowed!", Version);
return;
}
//This is 10.76 server, only handling 10.76 client bytes
InMessage.SkipBytes(17);
/*
* Skipped bytes:
* 4 bytes: protocolVersion
* 12 bytes: dat, spr, pic signatures (4 bytes each)
* 1 byte: 0
*
*/
if (!InMessage.RsaDecrypt())
{
Logger.Log(LogLevels.Information, "LoginConnection: Message could not be decrypted");
Disconnect();
return;
}
XteaKey[0] = InMessage.GetUInt32();
XteaKey[1] = InMessage.GetUInt32();
XteaKey[2] = InMessage.GetUInt32();
XteaKey[3] = InMessage.GetUInt32();
IsEncryptionEnabled = true;
string accountName = InMessage.GetString();
byte[] password = InMessage.GetBytes(InMessage.GetUInt16());
DispatcherManager.DatabaseDispatcher.AddTask(() => HandleLoginPacket(accountName, password));
}