/// <summary>
/// Process the player requests.
/// This method fires the <see cref="OnProcessPacket"/> event to be hooked up by plugins.
/// </summary>
public EPlayerRequestResult ProcessPlayerRequest(CPlayer player)
{
EPlayerRequestResult result = EPlayerRequestResult.NO_ERROR;
foreach (DProcessPacket target in OnProcessPacket.GetInvocationList())
{
result = target(this, player);
if (result != EPlayerRequestResult.NO_ERROR && result != EPlayerRequestResult.PACKET_NOT_HANDLED)
{
W2Log.Write("eita", ELogType.CRITICAL_ERROR);
break;
}
}
return(result);
}
/// <summary>
/// Process the newly connected client.
/// </summary>
/// <param name="client">The newly connected client.</param>
private async void ProcessClient_Channel1(TcpClient client)
{
using (client)
using (NetworkStream stream = client.GetStream())
{
CPlayer player = new CPlayer(stream);
CCompoundBuffer packet = player.RecvPacket;
try
{
// Iterate processing incoming player packets until he disconnects.
while (player.State != EPlayerState.CLOSED)
{
int readCount = await stream.ReadAsync(packet.RawBuffer, 0, NetworkBasics.MAXL_PACKET);
if (readCount != 4 && (readCount < 12 || readCount > NetworkBasics.MAXL_PACKET)) // Invalid game packet.
{
gameController.DisconnectPlayer(player);
break;
}
else // Possible valid game packet chunk.
{
unsafe
{
packet.Offset = 0;
fixed(byte *PinnedPacketChunk = &packet.RawBuffer[packet.Offset])
{
// Check for the init code.
if (*(uint *)&PinnedPacketChunk[packet.Offset] == NetworkBasics.INIT_CODE)
{
packet.Offset = 4;
// If a valid index can't be assigned to the player, disconnect him
if (!gameController.TryInsertPlayer(player))
{
player.SendPacket(MTextMessagePacket.Create("O servidor está lotado. Tente novamente mais tarde."));
gameController.DisconnectPlayer(player);
continue;
}
// If all the received chunk resumes to the INIT_CODE, read the next packet.
if (readCount == 4)
{
continue;
}
}
// Process all possible packets that were possibly sent together.
while (packet.Offset < readCount && player.State != EPlayerState.CLOSED)
{
// Check if the game packet size is bigger than the remaining received chunk.
if (packet.ReadNextUShort(0) > readCount - packet.Offset || packet.ReadNextUShort(0) < 12)
{
throw new Exception("Invalid received packet. Reading packet is bigger than the remaining chunk.");
}
// Tries to decrypt the packet.
if (!PacketSecurity.Decrypt(packet))
{
throw new Exception($"Can't decrypt a packet received from {client.Client.RemoteEndPoint}.");
}
W2Log.Write(String.Format("Processing recv packet {{0x{0:X}/{1}}} from {2}.",
packet.ReadNextUShort(4), packet.ReadNextUShort(0), client.Client.RemoteEndPoint), ELogType.NETWORK);
// Process the incoming packet.
EPlayerRequestResult requestResult = gameController.ProcessPlayerRequest(player);
// Treat the processing packet return.
switch (requestResult)
{
case EPlayerRequestResult.PACKET_NOT_HANDLED:
{
W2Log.Write(String.Format("Recv packet {{0x{0:X}/{1}}} from {2} didn't was processed.",
packet.ReadNextUShort(4), packet.ReadNextUShort(0), client.Client.RemoteEndPoint), ELogType.NETWORK);
byte[] rawPacket = new byte[packet.ReadNextUShort(0)];
for (int i = 0; i < rawPacket.Length; i++)
{
rawPacket[i] = PinnedPacketChunk[i + packet.Offset];
}
File.WriteAllBytes($@"..\..\Dumped Packets\Inner Packets\{packet.ReadNextUShort(4)}.bin",
rawPacket);
break;
}
case EPlayerRequestResult.CHECKSUM_FAIL:
{
W2Log.Write($"Recv packet from {client.Client.RemoteEndPoint} have invalid checksum.", ELogType.CRITICAL_ERROR);
gameController.DisconnectPlayer(player);
break;
}
case EPlayerRequestResult.PLAYER_INCONSISTENT_STATE:
{
W2Log.Write($"A player was disconnected due to inconsistent PlayerState.", ELogType.CRITICAL_ERROR);
gameController.DisconnectPlayer(player);
break;
}
}
// Correct the offset to process the next packet in the received chunk.
player.RecvPacket.Offset += packet.ReadNextUShort(0);
}
}
}
}
}
}
catch (Exception ex)
{
W2Log.Write($"An unhandled exception happened processing the player {player.Index}. MSG: {ex.Message}", ELogType.CRITICAL_ERROR);
}
finally
{
gameController.DisconnectPlayer(player);
}
}
}
