Master of Science thesis Fighting Spam

Tells wether this connection is established or not
public boolean closed,useEncryption;
private Socket socket;
private InetAddress remoteAddress;
private SecretKey secretKey;
private ObjectOutputStream outputStream;
private ObjectInputStream inputStream;
private long expirationTime;
public session(Socket socket, boolean server, Key RSAkey, boolean useEncryption)
throws Exception
{
try
{
this.useEncryption = useEncryption;
this.socket = socket;
remoteAddress = socket.getInetAddress();
if(server)
{
inputStream = new ObjectInputStream(socket.getInputStream());
outputStream = new ObjectOutputStream(socket.getOutputStream());
}
else
{
outputStream = new ObjectOutputStream(socket.getOutputStream());
inputStream = new ObjectInputStream(socket.getInputStream());
}
closed = false;
expirationTime = Config.expirationPeriod + System.currentTimeMillis();
socket.setSoTimeout((int)Config.expirationPeriod);
if(useEncryption)
{
Debugger.debug(getClass(), 3, "Establishing session with " +
remoteAddress + " using encryption.");
if(server)
{
CryptoPacket cp = (CryptoPacket) inputStream.readObject();
secretKey = Cryptotools.decryptRSA(cp, (RSAPrivateKey) RSAkey);
send(new StatusPacket(true, ""));
}
else
{
secretKey = Cryptotools.generateAESKey();
outputStream.writeObject(Cryptotools.encryptRSA(secretKey,
(RSAPublicKey) RSAkey));
StatusPacket ack = (StatusPacket) receive();
if(!ack.ok)
throw new Exception("Error initializing connection");
}
}
Debugger.debug(getClass(),3,"Session is established with: " + remoteAddress);
}
catch(IOException e)
{
//First packet was not an encrypted session-key, so we close connection and
return
try
{
closed = true;
socket.close();
}
catch(IOException ex)
{
Debugger.debug(getClass(),3,"Could not close connection to
"+remoteAddress);
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