public void SendPacket(byte[] packet)
{
Precondition.Check <InvalidOperationException>(Connected, "Socket is not connected");
Precondition.Check <InvalidOperationException>(Encrypted, "Handshake has not been received yet");
Precondition.Check <ArgumentException>(packet.Length >= 2, @"Packet length must be greater than 2");
lock (sendLock) {
byte[] final = new byte[packet.Length + PACKET_HEADER_SIZE];
switch (SessionType)
{
case SessionType.CLIENT:
clientCipher.GetHeaderToServer(packet.Length, final);
break;
case SessionType.SERVER:
clientCipher.GetHeaderToClient(packet.Length, final);
break;
}
clientCipher.Transform(packet);
Buffer.BlockCopy(packet, 0, final, PACKET_HEADER_SIZE, packet.Length);
SendRawPacket(final);
}
}
private void SendInternal(byte[] packet)
{
short opcode = BitConverter.ToInt16(packet, 0);
SendOp sendOp = (SendOp)opcode;
switch (sendOp)
{
case SendOp.USER_SYNC:
case SendOp.KEY_TABLE:
case SendOp.STAT:
case SendOp.EMOTION:
case SendOp.CHARACTER_LIST:
case SendOp.ITEM_INVENTORY:
case SendOp.FIELD_ADD_NPC:
case SendOp.FIELD_PORTAL:
case SendOp.NPC_CONTROL:
case SendOp.PROXY_GAME_OBJ:
case SendOp.FIELD_ADD_USER:
case SendOp.FIELD_ENTRANCE:
case SendOp.SERVER_ENTER:
break;
default:
string packetString = packet.ToHexString(' ');
logger.Debug($"SEND ({sendOp.ToString()}): {packetString.Substring(Math.Min(packetString.Length, 6))}".Pastel("#E05561"));
break;
}
Packet encryptedPacket = sendCipher.Transform(packet);
SendRaw(encryptedPacket);
}
private async void StartRead()
{
CancellationToken readToken = Source.Token;
while (!readToken.IsCancellationRequested)
{
try
{
int length = await NetworkStream.ReadAsync(RecvBuffer.AsMemory(0, RecvBuffer.Length), readToken);
if (length <= 0)
{
if (!Connected())
{
return;
}
continue;
}
MapleStream.Write(RecvBuffer, 0, length);
}
catch (IOException)
{
Disconnect();
return;
}
catch (Exception ex)
{
Logger.Error(ex, "Exception reading from socket:");
return;
}
while (MapleStream.TryRead(out byte[] packetBuffer))
{
Packet packet = RecvCipher.Transform(packetBuffer);
short opcode = packet.Reader().ReadShort();
RecvOp recvOp = (RecvOp)opcode;
switch (recvOp)
{
case RecvOp.USER_SYNC:
case RecvOp.KEY_TABLE:
case RecvOp.RIDE_SYNC:
case RecvOp.GUIDE_OBJECT_SYNC:
case RecvOp.REQUEST_TIME_SYNC:
case RecvOp.STATE:
case RecvOp.STATE_FALL_DAMAGE:
case RecvOp.VIBRATE:
break;
default:
string packetString = packet.ToString();
Logger.Debug($"RECV ({recvOp}): {packetString[Math.Min(packetString.Length, 6)..]}".ColorGreen());
break;
}
OnPacket?.Invoke(this, packet); // handle packet
}
private void SendInternal(byte[] packet)
{
short opcode = BitConverter.ToInt16(packet, 0);
if (opcode != 0x1C) // Filtering sync from logs
{
logger.Debug($"SEND ({packet.Length}): {packet.ToHexString(' ')}");
}
Packet encryptedPacket = sendCipher.Transform(packet);
SendRaw(encryptedPacket);
}
private async void StartRead()
{
CancellationToken readToken = source.Token;
while (!readToken.IsCancellationRequested)
{
try
{
int length = await networkStream.ReadAsync(recvBuffer, 0, recvBuffer.Length, readToken);
if (length <= 0)
{
if (!Connected())
{
return;
}
continue;
}
mapleStream.Write(recvBuffer, 0, length);
}
catch (IOException ex)
{
logger.Error("Exception reading from socket: ", ex);
return;
}
while (mapleStream.TryRead(out byte[] packetBuffer))
{
Packet packet = recvCipher.Transform(packetBuffer);
short opcode = packet.Reader().ReadShort();
RecvOp recvOp = (RecvOp)opcode;
switch (recvOp)
{
case RecvOp.USER_SYNC:
case RecvOp.KEY_TABLE:
break;
default:
string packetString = packet.ToString();
logger.Debug($"RECV ({recvOp.ToString()}): {packetString.Substring(Math.Min(packetString.Length, 6))}".Pastel("#8CC265"));
break;
}
OnPacket?.Invoke(this, packet); // handle packet
}
}
}
private void SendInternal(byte[] packet)
{
short opcode = BitConverter.ToInt16(packet, 0);
SendOp sendOp = (SendOp)opcode;
switch (sendOp)
{
case SendOp.USER_SYNC:
break;
default:
string packetString = packet.ToHexString(' ');
logger.Debug($"SEND ({sendOp.ToString()}): {packetString.Substring(Math.Min(packetString.Length, 6))}".Pastel("#E05561"));
break;
}
Packet encryptedPacket = sendCipher.Transform(packet);
SendRaw(encryptedPacket);
}
public void SendPacket(PacketWriter packet)
{
if (!m_connected)
{
throw new InvalidOperationException("Socket is not connected");
}
if (!m_encrypted)
{
throw new InvalidOperationException("Handshake has not been received yet");
}
byte[] data = packet.ToArray();
if (data.Length < 2)
{
throw new ArgumentOutOfRangeException("Packet length must be greater than 2", "packet");
}
const int HeaderSize = 4;
lock (m_sendLock)
{
byte[] final = new byte[data.Length + HeaderSize];
switch (m_sessionType)
{
case SessionType.Client:
m_clientCipher.GetHeaderToServer(data.Length, final);
break;
case SessionType.Server:
m_clientCipher.GetHeaderToClient(data.Length, final);
break;
}
m_clientCipher.Transform(data);
Buffer.BlockCopy(data, 0, final, HeaderSize, data.Length);
SendRawPacket(final);
}
}
private void ProcessPacket()
{
while (cursor > PACKET_HEADER_SIZE && Connected)
{
int packetSize = MapleCipher.GetPacketLength(packetBuffer);
if (cursor < packetSize + PACKET_HEADER_SIZE || OnPacket == null)
{
return;
}
byte[] buffer = new byte[packetSize];
Buffer.BlockCopy(packetBuffer, PACKET_HEADER_SIZE, buffer, 0, packetSize);
serverCipher.Transform(buffer);
cursor -= packetSize + PACKET_HEADER_SIZE;
if (cursor > 0)
{
Buffer.BlockCopy(packetBuffer, packetSize + PACKET_HEADER_SIZE, packetBuffer, 0, cursor);
}
OnPacket(this, buffer);
}
}
private async void StartRead()
{
CancellationToken readToken = source.Token;
while (!readToken.IsCancellationRequested)
{
try {
int length = await networkStream.ReadAsync(recvBuffer, 0, recvBuffer.Length, readToken);
if (length <= 0)
{
if (!Connected())
{
return;
}
continue;
}
mapleStream.Write(recvBuffer, 0, length);
} catch (IOException ex) {
logger.Error("Exception reading from socket: ", ex);
return;
}
while (mapleStream.TryRead(out byte[] packetBuffer))
{
Packet packet = recvCipher.Transform(packetBuffer);
short opcode = packet.Reader().ReadShort();
if (opcode != 0x12) // Filtering sync from logs
{
logger.Debug($"RECV ({packet.Length}): {packet}");
}
OnPacket?.Invoke(this, packet); // handle packet
}
}
}
private void ManipulateBuffer()
{
if (m_encrypted)
{
const int HeaderSize = 4;
while (m_cursor > HeaderSize && m_connected) //header room + still connected
{
int packetSize = MapleCipher.GetPacketLength(m_packetBuffer);
if (m_cursor < packetSize + HeaderSize) //header + packet room
{
break;
}
byte[] buffer = new byte[packetSize];
Buffer.BlockCopy(m_packetBuffer, HeaderSize, buffer, 0, packetSize); //copy packet
m_serverCipher.Transform(buffer); //decrypt
m_cursor -= packetSize + HeaderSize; //fix len
if (m_cursor > 0) //move reamining bytes
{
Buffer.BlockCopy(m_packetBuffer, packetSize + HeaderSize, m_packetBuffer, 0, m_cursor);
}
if (OnPacket != null)
{
OnPacket(this, buffer);
}
buffer = null; //get rid of buffer
}
}
else if (m_cursor >= 2)
{
const int HeaderSize = 2;
short packetSize = BitConverter.ToInt16(m_packetBuffer, 0);
if (m_cursor >= packetSize + HeaderSize)
{
byte[] buffer = new byte[packetSize];
Buffer.BlockCopy(m_packetBuffer, HeaderSize, buffer, 0, packetSize);
PacketReader packet = new PacketReader(buffer);
short major = packet.ReadShort();
string minor = packet.ReadMapleString();
m_clientCipher = new MapleCipher(major, packet.ReadBytes(4), m_aesCipher, CipherType.Encrypt);
m_serverCipher = new MapleCipher(major, packet.ReadBytes(4), m_aesCipher, CipherType.Decrypt);
byte locale = packet.ReadByte();
m_encrypted = true; //start waiting for encrypted packets
if (OnHandshake != null)
{
var info = new ServerInfo()
{
Version = major,
Subversion = minor,
Locale = locale
};
OnHandshake(this, info);
}
buffer = null; //get rid of buffer
m_cursor = 0; //reset stream
}
}
}