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using System;
using System.Collections.Generic;
using System.Linq;
using Impostor.Api.Net.Messages;
using Impostor.Hazel;
using Impostor.Hazel.Extensions;
using Impostor.Hazel.Udp;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.ObjectPool;
using PcapDotNet.Core;
using PcapDotNet.Packets;
namespace Impostor.Tools.Proxy
{
internal static class Program
{
private const string DeviceName = "Intel(R) I211 Gigabit Network Connection";
private static readonly Dictionary<byte, string> TagMap = new Dictionary<byte, string>
{
{0, "HostGame"},
{1, "JoinGame"},
{2, "StartGame"},
{3, "RemoveGame"},
{4, "RemovePlayer"},
{5, "GameData"},
{6, "GameDataTo"},
{7, "JoinedGame"},
{8, "EndGame"},
{9, "GetGameList"},
{10, "AlterGame"},
{11, "KickPlayer"},
{12, "WaitForHost"},
{13, "Redirect"},
{14, "ReselectServer"},
{16, "GetGameListV2"}
};
private static IServiceProvider _serviceProvider;
private static ObjectPool<MessageReader> _readerPool;
//c 服务器入口
private static void Main(string[] args)
{
var services = new ServiceCollection();
services.AddHazel();
_serviceProvider = services.BuildServiceProvider();
_readerPool = _serviceProvider.GetRequiredService<ObjectPool<MessageReader>>();
var devices = LivePacketDevice.AllLocalMachine;
if (devices.Count == 0)
{
Console.WriteLine("No interfaces found! Make sure WinPcap is installed.");
return;
}
var device = devices.FirstOrDefault(x => x.Description.Contains(DeviceName));
if (device == null)
{
Console.WriteLine("Unable to find configured device.");
return;
}
using (var communicator = device.Open(65536, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
using (var filter = communicator.CreateFilter("udp and port 22023"))
{
communicator.SetFilter(filter);
}
communicator.ReceivePackets(0, PacketHandler);
}
}
private static void PacketHandler(Packet packet)
{
var ip = packet.Ethernet.IpV4;
var ipSrc = ip.Source.ToString();
var udp = ip.Udp;
// True if this is our own packet.
using (var stream = udp.Payload.ToMemoryStream())
{
using var reader = _readerPool.Get();
reader.Update(stream.ToArray());
var option = reader.Buffer[0];
if (option == (byte) MessageType.Reliable)
{
reader.Seek(reader.Position + 3);
}
else if (option == (byte) UdpSendOption.Acknowledgement ||
option == (byte) UdpSendOption.Ping ||
option == (byte) UdpSendOption.Hello ||
option == (byte) UdpSendOption.Disconnect)
{
return;
}
else
{
reader.Seek(reader.Position + 1);
}
var isSent = ipSrc.StartsWith("192.");
while (true)
{
if (reader.Position >= reader.Length)
{
break;
}
//c 消息
using var message = reader.ReadMessage();
if (isSent)
{
HandleToServer(ipSrc, message);
}
else
{
HandleToClient(ipSrc, message);
}
if (message.Position < message.Length)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("- Did not consume all bytes.");
}
}
}
}
private static void HandleToClient(string source, IMessageReader packet)
{
var tagName = TagMap.ContainsKey(packet.Tag) ? TagMap[packet.Tag] : "Unknown";
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine($"{source,-15} Client received: {packet.Tag,-2} {tagName}");
switch (packet.Tag)
{
case 14:
case 13:
// packet.Position = packet.Length;
break;
case 0:
Console.WriteLine("- GameCode " + packet.ReadInt32());
break;
case 5:
case 6:
Console.WriteLine(HexUtils.HexDump(packet.Buffer.ToArray().Take(packet.Length).ToArray()));
// packet.Position = packet.Length;
break;
case 7:
Console.WriteLine("- GameCode " + packet.ReadInt32());
Console.WriteLine("- PlayerId " + packet.ReadInt32());
Console.WriteLine("- Host " + packet.ReadInt32());
var playerCount = packet.ReadPackedInt32();
Console.WriteLine("- PlayerCount " + playerCount);
for (var i = 0; i < playerCount; i++)
{
Console.WriteLine("- PlayerId " + packet.ReadPackedInt32());
}
break;
case 10:
Console.WriteLine("- GameCode " + packet.ReadInt32());
Console.WriteLine("- Flag " + packet.ReadSByte());
Console.WriteLine("- Value " + packet.ReadBoolean());
break;
}
}
private static void HandleToServer(string source, IMessageReader packet)
{
var tagName = TagMap.ContainsKey(packet.Tag) ? TagMap[packet.Tag] : "Unknown";
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine($"{source,-15} Server received: {packet.Tag,-2} {tagName}");
switch (packet.Tag)
{
case 0:
Console.WriteLine("- GameInfo length " + packet.ReadBytesAndSize().Length);
break;
case 1:
Console.WriteLine("- GameCode " + packet.ReadInt32());
Console.WriteLine("- Unknown " + packet.ReadByte());
break;
case 5:
case 6:
Console.WriteLine("- GameCode " + packet.ReadInt32());
Console.WriteLine(HexUtils.HexDump(packet.Buffer.ToArray().Take(packet.Length).ToArray()));
// packet.Position = packet.Length;
break;
}
}
}
}
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