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cursed but proper packet handling

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rafi1212122
2023-05-27 19:09:32 +07:00
parent 55b943c6f7
commit aa6f0e08c9
3 changed files with 72 additions and 63 deletions
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110
GameServer/Session.cs
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@@ -1,4 +1,7 @@
using System.Net.Sockets;
using System.Data.SqlTypes;
using System;
using System.IO;
using System.Net.Sockets;
using Common;
using Common.Resources.Proto;
using Common.Utils;
@@ -18,84 +21,65 @@ namespace PemukulPaku.GameServer
Id = id;
Client = client;
c = new Logger(Id);
Task.Run(() => ClientLoop(client));
Task.Run(ClientLoop);
}
private void ClientLoop(TcpClient client)
private void ClientLoop()
{
NetworkStream stream = client.GetStream();
NetworkStream stream = Client.GetStream();
byte[] packetMagic = { 0x01, 0x23, 0x45, 0x67 }; // Magic start pattern
byte[] packetEnd = { 0x89, 0xAB, 0xCD, 0xEF }; // Magic end pattern
byte[] buffer = new byte[4096];
int bytesRead;
byte[] msg = new byte[1 << 16];
try
while (Client.Connected)
{
while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
Array.Clear(msg, 0, msg.Length);
int len = stream.Read(msg, 0, msg.Length);
if(len > 0)
{
// Process the received bytes
for (int i = 0; i < bytesRead; i++)
List<byte[]> packets = new ();
string CursedMsg = BitConverter.ToString(msg).Replace("-", "");
string CursedMagic = BitConverter.ToString(packetMagic).Replace("-", "");
string CursedEnd = BitConverter.ToString(packetEnd).Replace("-", "");
int MagicIndex = 0;
int EndIndex = 0;
while ((MagicIndex = CursedMsg.IndexOf(CursedMagic, MagicIndex)) != -1 && (EndIndex = CursedMsg.IndexOf(CursedEnd, EndIndex)) != -1)
{
if (buffer[i] == packetMagic[0])
EndIndex += 8;
byte[] packet = new byte[EndIndex / 2 - MagicIndex / 2];
Array.Copy(msg, MagicIndex / 2, packet, 0, EndIndex / 2 - MagicIndex / 2);
packets.Add(packet);
MagicIndex += MagicIndex;
EndIndex += EndIndex;
}
c.Debug($"Found {packets.Count} packet");
foreach (byte[] packet in packets)
{
if (Packet.IsValid(packet))
{
bool found = true;
for (int j = 1; j < packetMagic.Length; j++)
{
if (buffer[i + j] != packetMagic[j])
{
found = false;
break;
}
}
if (found)
{
// Magic start pattern found
int endIndex = Array.IndexOf(buffer, packetEnd[0], i + packetMagic.Length);
if (endIndex != -1)
{
// Magic end pattern found
int packetLength = endIndex - i + packetEnd.Length;
byte[] packet = new byte[packetLength];
Array.Copy(buffer, i, packet, 0, packetLength);
// Process the packet
ProcessPacket(packet);
// Update the buffer
int remainingBytes = bytesRead - (i + packetLength);
Array.Copy(buffer, i + packetLength, buffer, 0, remainingBytes);
// Adjust the bytesRead value accordingly
bytesRead = remainingBytes;
i = -1; // Start processing from the beginning of the buffer again
}
else
{
// End pattern not found, break the loop and wait for more data
break;
}
}
ProcessPacket(packet);
}
else
{
c.Error("Invalid packet received:", BitConverter.ToString(packet).Replace("-", ""));
}
}
}
}
catch (Exception ex)
{
if (Client != null)
{
c.Warn($"{Id} disconnected");
Server.GetInstance().Sessions.Remove(Id);
c.Debug("TCP client disconnect reason: " + ex.Message);
}
else
{
c.Error("TCP client error: " + ex.Message);
}
}
finally { Server.GetInstance().LogClients(); };
c.Debug("ClientLoop ends");
Server.GetInstance().LogClients();
c.Warn($"{Id} disconnected");
Server.GetInstance().Sessions.Remove(Id);
}
public void ProcessPacket(byte[] packet)