protected override void Init(Server server)
{
m_Server = server;
m_RSACryptoPrivate = new RSACryptoServiceProvider(RSAKeySize);
m_RSACryptoPrivate.PersistKeyInCsp = false;
m_SendPacketSerial = 0;
m_ReceivePacketSerial = 0;
IgeNetStream stream = GetStream();
stream.CalculateChecksums = true;
m_WriterStream = new BinaryWriter(stream);
m_CanProcessPackets.Reset();
(m_PacketReceiverThread = new Thread(PacketReceiverThread)).Start(GetStream());
base.Init(server);
}
private void SendNonBlocking(Packet packet)
{
PacketEncryptionMethod encryption = packet.Encryption;
lock (SyncSend) {
if (m_WriterStream == null || !Connected)
{
throw new IOException("Client is not connected");
}
IgeNetStream stream = (IgeNetStream)m_WriterStream.BaseStream;
if (GameDebugger.MinNetLogLevel <= LogLevel.VerboseDebug)
{
Log(LogLevel.VerboseDebug, "Sending packet: '{0}'. Packet contents: {1}", packet.GetType().FullName, packet.ToString());
}
else
{
Log(LogLevel.Debug, "Sending packet: '{0}'", packet.GetType().FullName);
}
// Log(LogLevel.Debug, "Resetting send checksum");
// stream.ResetWriteChecksum();
//Thread.MemoryBarrier();
Log(LogLevel.Debug, "Sending packet id: 0x{0:X8}", packet.Id);
m_WriterStream.Write(packet.Id);
switch (encryption)
{
case PacketEncryptionMethod.RSA: {
Log(LogLevel.Debug, "Serializing packet to a RSA encrypted block");
using (BinaryWriter cryptoWriter = new BinaryWriter(new MemoryStream(), Encoding.Unicode)) {
packet.Serialize(cryptoWriter);
byte[] cryptoData = m_RSACryptoPublic.Encrypt(((MemoryStream)cryptoWriter.BaseStream).ToArray(), false);
Log(LogLevel.Debug, "Encrypted serialized block size: {0}", cryptoData.Length);
m_WriterStream.Write(cryptoData.Length);
m_WriterStream.Write(cryptoData);
}
break;
}
case PacketEncryptionMethod.Rijndael: {
Log(LogLevel.Debug, "Serializing packet to a Rijndael crypto stream");
using (MemoryStream mem = new MemoryStream()) {
using (BinaryWriter cryptoWriter = new BinaryWriter(new CryptoStream(mem, m_RijCrypto.CreateEncryptor(), CryptoStreamMode.Write), Encoding.Unicode)) {
packet.Serialize(cryptoWriter);
}
byte[] cryptoData = mem.ToArray();
Log(LogLevel.Debug, "Encrypted serialized block size: {0}", cryptoData.Length);
m_WriterStream.Write(cryptoData.Length);
m_WriterStream.Write(cryptoData);
}
break;
}
default: {
Log(LogLevel.Debug, "Serializing packet to a write stream");
packet.Serialize(m_WriterStream);
break;
}
}
uint checksum = stream.WriteChecksum ^ unchecked (m_SendPacketSerial++);
//Thread.MemoryBarrier();
Log(LogLevel.Debug, "Sending checksum: 0x{0:X8}", checksum);
m_WriterStream.Write(checksum);
//Thread.MemoryBarrier();
Log(LogLevel.Debug, "Packet sending done");
}
}
private void PacketReceiverThread(object param)
{
IgeNetStream stream = (IgeNetStream)param;
Log(LogLevel.Debug, "PacketReceiverThread: start");
try {
using (BinaryReader reader = new BinaryReader(stream)) {
Packet packet;
uint packetId, checksum, checksum2;
((IgeNetStream)reader.BaseStream).CalculateChecksums = true;
while (true)
{
// Log(LogLevel.Debug, "PacketReceiverThread: resetting read checksum");
// stream.ResetReadChecksum();
//Thread.MemoryBarrier();
Log(LogLevel.Debug, "PacketReceiverThread: reading packet id");
packetId = reader.ReadUInt32();
Log(LogLevel.Debug, "PacketReceiverThread: creating packet 0x{0:X8} instance", packetId);
packet = Packet.CreateInstance(packetId);
switch (packet.Encryption)
{
case PacketEncryptionMethod.RSA: {
int cryptoSize = reader.ReadInt32();
Log(LogLevel.Debug, "PacketReceiverThread: deserializing packet 0x{0:X8} from an RSA encrypted block ({1} bytes)", packetId, cryptoSize);
using (BinaryReader cryptoReader = new BinaryReader(new MemoryStream(m_RSACryptoPrivate.Decrypt(reader.ReadBytes(cryptoSize), false)), Encoding.Unicode)) {
packet.Deserialize(cryptoReader);
}
break;
}
case PacketEncryptionMethod.Rijndael: {
int cryptoSize = reader.ReadInt32();
Log(LogLevel.Debug, "PacketReceiverThread: deserializing packet 0x{0:X8} from a Rijndael crypto stream ({1} bytes)", packetId, cryptoSize);
using (MemoryStream mem = new MemoryStream(reader.ReadBytes(cryptoSize))) {
using (BinaryReader cryptoReader = new BinaryReader(new CryptoStream(mem, m_RijCrypto.CreateDecryptor(), CryptoStreamMode.Read), Encoding.Unicode)) {
packet.Deserialize(cryptoReader);
}
}
break;
}
default: {
Log(LogLevel.Debug, "PacketReceiverThread: deserializing packet 0x{0:X8} from a read stream", packetId);
packet.Deserialize(reader);
break;
}
}
if (GameDebugger.MinNetLogLevel <= LogLevel.VerboseDebug)
{
Log(LogLevel.VerboseDebug, "PacketReceiverThread: received packet '{0}'. Packet contents: {1}", packet.GetType().FullName, packet.ToString());
}
else
{
Log(LogLevel.Debug, "PacketReceiverThread: received packet '{0}'", packet.GetType().FullName);
}
//Thread.MemoryBarrier();
// packet.Deserialize(reader);
checksum = stream.ReadChecksum ^ unchecked (m_ReceivePacketSerial++);
//Thread.MemoryBarrier();
checksum2 = reader.ReadUInt32();
//Thread.MemoryBarrier();
Log(LogLevel.Debug, "PacketReceiverThread: comparing checksums (calculated=0x{0:X8}; received=0x{1:X8})", checksum, checksum2);
if (checksum != checksum2)
{
Disconnect();
throw new UserFriendlyException("The protocol might be broken or some packet serializer and deserializer don't match each other.", "Connection error");
}
MethodInfo method;
if (packet is RSAServerPublicKeyPacket || packet is RSAClientPublicKeyPacket || packet is RijndaelEncryptionKeyPacket)
{
Log(LogLevel.Debug, "PacketReceiverThread: searching for handler method in IGE.Net.Client");
method = typeof(Client).GetMethod("OnPacketReceived", BindingFlags.ExactBinding | BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.NonPublic, null, new Type[] { packet.GetType() }, null);
}
else
{
m_CanProcessPackets.WaitOne(); // block any non encryption key exchange packets
Log(LogLevel.Debug, "PacketReceiverThread: searching for handler method in derived class");
method = GetType().GetMethod("OnPacketReceived", BindingFlags.ExactBinding | BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.NonPublic, null, new Type[] { packet.GetType() }, null);
}
if (method != null)
{
Log(LogLevel.Debug, "PacketReceiverThread: invoking custom packet received event");
method.Invoke(this, new object[] { packet });
}
else
{
Log(LogLevel.Debug, "PacketReceiverThread: invoking default packet received event");
OnPacketReceived(packet);
}
if (PacketReceivedEvent != null)
{
PacketReceivedEvent.Invoke(this, new PacketReceivedEventArgs(packet));
}
}
}
}
catch (Exception ex) {
Log(LogLevel.Debug, "PacketReceiverThread exception: {0}", ex.ToString());
}
finally {
stream.Dispose();
}
Log(LogLevel.Debug, "PacketReceiverThread: end");
}
