/// <summary>
/// Incoming packets are pushed here for handling.
/// </summary>
protected unsafe override void HandlePacket(IPacketBase packet)
{
base.HandlePacket(packet);
//Update state from the client
if (packet is PushState)
{
var state = (PushState)packet;
//Push their state if it's the correct world ID
if (state.WorldID == WorldID)
{
LastState = state.State;
}
}
//Move the user in to a new zone
else if (packet is RequestZoneTransfer)
{
var request = (RequestZoneTransfer)packet;
mWorld.ZoneManager.RequestZoneTransfer(this, request.ZoneID);
}
//Resolve names
else if (packet is WhoisRequest)
{
var request = (WhoisRequest)packet;
var response = PacketFactory.CreatePacket <WhoisResponse>();
response.WorldID = request.WorldID;
var name = mWorld.GetNameForWorldID(request.WorldID);
TextHelpers.StringToBuffer(name, response.Name, name.Length);
DeferredSendPacket(response);
}
}
/// <summary>
/// Updates this entity, flushes and handles any pending packets in the incoming queue.
/// </summary>
public void Update(TimeSpan dt)
{
//Handle all packets in the incoming queue
IPacketBase packet = null;
while (m_incomingQueue.TryDequeue(out packet))
{
HandlePacket(packet);
}
//Send any packets that have been deferred
foreach (CoalescedData p in m_deferredSendList)
{
SendPacket(p);
}
m_deferredSendList.Clear();
if (m_currentDeferredPacket.PacketCount > 0)
{
SendPacket(m_currentDeferredPacket);
}
//Reset the current deferred packet for next update
m_currentDeferredPacket = PacketFactory.CreatePacket <CoalescedData>();
//Warn if any of the queues are getting swamped
if (m_outgoingQueue.Count > 25)
{
Console.WriteLine("Outgoing queue swamped: " + m_outgoingQueue.Count);
}
if (m_incomingQueue.Count > 25)
{
Console.WriteLine("Incoming queue swamped: " + m_incomingQueue.Count);
}
}
/// <summary>
/// Sends states of nearby enemies to each other
/// </summary>
public void PushNearbyEntities(ServerEntity entity)
{
const int minSqrDistance = 768 * 768;
foreach (var e in mEntities.Values)
{
if (e.AuthState != EEntityAuthState.Authorised || e.WorldID == entity.WorldID)
{
//Skip unauthorised entities and don't send to self
continue;
}
float xDiff = entity.LastState.X - e.LastState.X;
float yDiff = entity.LastState.Y - e.LastState.Y;
var sqrdistance = (xDiff * xDiff) + (yDiff * yDiff);
if (sqrdistance > minSqrDistance)
{
continue;
}
//Add a push state into the coalesced data packet for this entity
var state = PacketFactory.CreatePacket <PushState>();
state.WorldID = e.WorldID;
state.State = e.LastState;
entity.DeferredSendPacket(state);
}
}
/// <summary>
/// Send a clock sync request, if there is not already one pending.
/// </summary>
public void SendClockSync()
{
if (!m_awaitingClockSyncResponse)
{
m_clockSyncSendTime = Environment.TickCount;
m_awaitingClockSyncResponse = true;
SendPacket(PacketFactory.CreatePacket <ClockSyncRequest>());
}
}
public void CreatePacket(byte[] value, Type expectedType)
{
var streamMock = new MemoryStream(value);
var factory = new PacketFactory(new PacketReader());
var result = factory.CreatePacket(streamMock);
result.GetType().Should().Be(expectedType);
}
/// <summary>
/// Packet handler logic
/// </summary>
protected virtual void HandlePacket(IPacketBase packet)
{
//Send auth responses for an auth request
if (packet is AuthRequest)
{
AuthResponse response = PacketFactory.CreatePacket <AuthResponse>();
//Tell them their world ID
response.WorldID = WorldID;
DeferredSendPacket(response);
AuthState = EntityAuthState.Authorised;
}
//Update auth state and world ID
else if (packet is AuthResponse)
{
AuthResponse response = (AuthResponse)packet;
WorldID = response.WorldID;
AuthState = EntityAuthState.Authorised;
}
//Unpack coalesced packets
else if (packet is CoalescedData)
{
CoalescedData data = (CoalescedData)packet;
unsafe
{
byte *ptr = data.DataBuffer;
//Start deserializing packets from the buffer
for (int i = 0; i < data.PacketCount; i++)
{
//Deserialize and advance pointer to next packet in the buffer
ptr += DeserializePacket((IntPtr)ptr);
}
}
}
//Synchronise clocks
else if (packet is ClockSyncResponse)
{
ClockSyncResponse response = (ClockSyncResponse)packet;
int rtt = Environment.TickCount - m_clockSyncSendTime;
m_roundTripTimes.Enqueue(rtt);
if (m_roundTripTimes.Count > 10)
{
m_roundTripTimes.Dequeue();
}
SyncClock(response.Time);
m_awaitingClockSyncResponse = false;
}
else if (packet is ClockSyncRequest)
{
ClockSyncResponse response = PacketFactory.CreatePacket <ClockSyncResponse>();
response.Time = Environment.TickCount;
SendPacket(response);
}
}
/// <summary>
/// Send an authorisation request.
/// </summary>
public virtual void Authorise()
{
//Don't send multiple auths
if (AuthState == EntityAuthState.Unauthorised)
{
AuthState = EntityAuthState.Authorising;
DeferredSendPacket(PacketFactory.CreatePacket <AuthRequest>());
}
}
/// <summary>
/// Queues a packet to be send on the next update. Will coalesce these packets together.
/// </summary>
public void DeferredSendPacket(IPacketBase packet)
{
if (!m_currentDeferredPacket.TryAddPacket(packet))
{
m_deferredSendList.Add(m_currentDeferredPacket);
m_currentDeferredPacket = PacketFactory.CreatePacket <CoalescedData>();
m_currentDeferredPacket.TryAddPacket(packet);
}
}
public void TestInput()
{
Assert.Equal(6, PacketFactory.CreatePacket("D2FE28").VersionSum());
Assert.Equal(9, PacketFactory.CreatePacket("38006F45291200").VersionSum());
Assert.Equal(16, PacketFactory.CreatePacket("8A004A801A8002F478").VersionSum());
Assert.Equal(14, PacketFactory.CreatePacket("EE00D40C823060").VersionSum());
Assert.Equal(12, PacketFactory.CreatePacket("620080001611562C8802118E34").VersionSum());
Assert.Equal(23, PacketFactory.CreatePacket("C0015000016115A2E0802F182340").VersionSum());
Assert.Equal(31, PacketFactory.CreatePacket("A0016C880162017C3686B18A3D4780").VersionSum());
}
public void TestInputTwo()
{
Assert.Equal(3, PacketFactory.CreatePacket("C200B40A82").GetValue());
Assert.Equal(54, PacketFactory.CreatePacket("04005AC33890").GetValue());
Assert.Equal(7, PacketFactory.CreatePacket("880086C3E88112").GetValue());
Assert.Equal(9, PacketFactory.CreatePacket("CE00C43D881120").GetValue());
Assert.Equal(1, PacketFactory.CreatePacket("D8005AC2A8F0").GetValue());
Assert.Equal(0, PacketFactory.CreatePacket("F600BC2D8F").GetValue());
Assert.Equal(0, PacketFactory.CreatePacket("9C005AC2F8F0").GetValue());
Assert.Equal(1, PacketFactory.CreatePacket("9C0141080250320F1802104A08").GetValue());
}
public void ShouldThrowOnInvalidPacketId()
{
var streamMock = new MemoryStream(new byte[1] {
10
});
var factory = new PacketFactory(new PacketReader());
Exception exception = Assert.Throws <InvalidPacketException>(() => factory.CreatePacket(streamMock));
exception.Should().NotBeNull();
}
public void ImmidiateSend(string _action, object _payload, EventHandler <Packet> _callback = null, Action <bool> _completed = null)
{
if (!IsOpen())
{
return;
}
var packet = PacketFactory.CreatePacket(_action, _payload);
var request = new Request(packet, _callback, _completed, false);
Send(request);
}
private byte[] AuthResponse(AuthenticationResult result, Account account)
{
using (var builder = PacketFactory.CreatePacket("Authentication"))
{
builder.WriteInt32(result);
builder.WriteInt16(0x0000);
if (result == AuthenticationResult.Success)
{
builder.WriteInt32(account.AccountId);
if (State == AuthClientState.SetGender)
{
builder.WriteByte(AuthOperationType.GenderSelect);
}
else if (State == AuthClientState.SetPin)
{
builder.WriteByte(AuthOperationType.PinSelect);
}
else
{
builder.WriteByte(account.Gender);
}
// Enables commands like /c, /ch, /m, /h (etc.), but disables trading
builder.WriteBoolean(account.IsGameMaster);
// Seems like 0x80 is a "MWLB" account - I doubt it... it disables attacking and allows GM fly
// 0x40, 0x20 (and probably 0x10, 0x8, 0x4, 0x2, and 0x1) don't appear to confer any particular benefits, restrictions, or functionality
// (Although I didn't test client GM commands or anything of the sort)
builder.WriteByte(account.IsGameMaster ? 0x80 : 0x00);
builder.WriteBoolean(account.IsGameMaster || account.IsGameMasterHelper);
builder.WriteLengthString(account.UserName);
builder.WriteByte(2);
// TODO: quiet ban support?
//builder.WriteByte(account.QuietBanReason);
builder.WriteByte(0);
//builder.WriteTimestamp(account.QuietBanTime);
builder.WriteInt64(0);
// TODO: Creation time
builder.WriteTimestamp(account.CreationTime);
builder.WriteInt32(0);
}
return(builder.ToByteArray());
}
}
private byte[] WorldListResponse()
{
var worlds = _nexus.GetWorlds();
using (var builder = PacketFactory.CreatePacket("WorldListRequest"))
{
foreach (var world in worlds)
{
builder.WriteWorld(world);
}
return(builder.ToByteArray());
}
}
protected override void Encode(IChannelHandlerContext context, SPacket message, List <object> output)
{
var packet = packetFactory.CreatePacket(message);
if (string.IsNullOrEmpty(packet))
{
logger.Debug("Empty packet, skipping it");
return;
}
output.Add(packet);
logger.Debug($"Out [{message.GetType().Name}]: {packet}");
}
protected override void Decode(IChannelHandlerContext context, string message, List <object> output)
{
var packet = packetFactory.CreatePacket(message);
if (packet is null)
{
logger.Debug("Failed to create typed packet, skipping it");
return;
}
output.Add(packet);
logger.Debug($"In [{packet.GetType().Name}]: {message}");
}
public void SequencialSend(string _action, object _payload, EventHandler <Packet> _callback, Action <bool> _completed = null)
{
if (!IsOpen())
{
return;
}
var packet = PacketFactory.CreatePacket(_action, _payload);
var request = new Request(packet, _callback, _completed, true);
roundTrips.Enqueue(request);
if (roundTrips.Peek() == request)
{
Send(request);
}
}
public IPacket ReadPacket()
{
ushort type = ReadUInt16();
ReadByte(); // skipped byte
int body_length = ReadInt32();
var start = this.BaseStream.Position;
var p = PacketFactory.CreatePacket(
packet_type: type, this
);
for (; BaseStream.Position - start < body_length; ReadByte())
{
;
}
return(p);
}
private void ReceivedPayload()
{
byte[] data = buffer.data;
try
{
BitReader r = new BitReader(data, data.Length);
byte id = r.ReadUInt8();
TPacket packet = packetFactory.CreatePacket(id);
if (packet == null)
{
Log.Error($"No {typeof(TPacket).Name} for id: {id}");
return;
}
if (packet is ITokenPacket token)
{
packet.ReadTokenPacket(r);
if (token.TokenResponse)
{
HandleTokenPacket(packet, token.Token);
}
else
{
HandlePacket(packet);
}
}
else
{
try
{
packet.ReadPacket(r);
HandlePacket(packet);
}
catch (Exception e)
{
Log.Error(e);
Disconnect();
}
}
}
finally
{
buffer.Reset(4);
}
}
static void Main(string[] args)
{
var testPacket = PacketFactory.CreatePacket <MessagePacket>();
testPacket.Message = "Something";
testPacket.Sender = "Someone";
var packetJson = testPacket.ToJson();
Console.WriteLine(packetJson);
PacketFactory.JsonToPacket(packetJson, out IPacket testDeserialize);
switch (testDeserialize.Type)
{
case PacketType.Message:
HandleMessage(testDeserialize as MessagePacket);
break;
}
Console.ReadLine();
}
public void PuzzelTwo()
{
Assert.Equal(277110354175, PacketFactory.CreatePacket(InputParser.ParseString("input_data/day16-1.txt").First()).GetValue());
}
public void PuzzelOne()
{
Assert.Equal(979, PacketFactory.CreatePacket(InputParser.ParseString("input_data/day16-1.txt").First()).VersionSum());
}
/// <summary>
/// Completes an async event to receive data.
/// </summary>
/// <param name="result"></param>
private void OnClientReceiveData(IAsyncResult result)
{
//log.Debug($"isAuth {isAuth}");
//log.Debug("OnClientReceiveData");
// Prevent invalid calls to this function..
if (!this._isRunning || result.IsCompleted == false || !(result.AsyncState is Socket))
{
this.Stop();
return;
}
lock (syncLock)
{
Socket client = (result.AsyncState as Socket);
// Attempt to end the async call..
int recvCount = 0;
try
{
try
{
recvCount = client.EndReceive(result);
}
catch (Exception exception)
{
//log.Debug(exception.ToString());
this.Stop();
throw;
// TODO: atleast log the exception.
}
if (recvCount == 0)
{
this.Stop();
return;
}
}
catch (Exception ex)
{
this.Stop();
return;
}
// Read the current packet.
byte[] recvData = new byte[recvCount];
Array.Copy(this._clientBuffer, 0, recvData, 0, recvCount);
this._clientBacklog.AddRange(recvData);
//this.SendToServerRaw(recvData);
// Iterate through the whole packets, parse them and delete them from the buffer.
while (true)
{
/*
* L2Packet structure:
| 2 byte size | 1 byte id | up to 65535 bytes for data (payload) |
*/
// If packet buffer is lesser than 3 bytes there is no valid packet for parsing (the minimum is atleast 3 bytes (2 bytes for size, 1 for id)
if (this._clientBacklog.Count < 3)
{
break;
}
while (L2Injector._sgObjInit == false)
{
Thread.Sleep(20);
}
// Calculate the packet length by parsing the first 2 bytes.
int packetSize = BitConverter.ToInt16(this._clientBacklog.ToArray(), 0);
if (this._clientBacklog.Count < packetSize)
{
break;
}
byte[] receivedPacket = new byte[packetSize];
Array.Copy(this._clientBacklog.ToArray(), 0, receivedPacket, 0, packetSize);
bool shouldDropPacket = false;
this._clientBacklog.RemoveRange(0, packetSize);
if (!isAuth && _isInit)
{
_gamePacketObfuscator.DeobfuscatePacketFromClient(receivedPacket);
_secondaryGamePacketObfuscator?.DeobfuscatePacketFromClient(receivedPacket);
try
{
if (!JUSTASNIFFER)
{
var packet = packetFactory.CreatePacket(receivedPacket, false);
packet?.Parse(BotInstance.PlayerData);
if (packet?.DropPacket == true && _gamePacketObfuscator is SGInGameCipher)
{
shouldDropPacket = true;
//((SGInGameCipher)_gamePacketObfuscator).reverseCrypt(receivedPacket, ((SGInGameCipher)_gamePacketObfuscator).clientKeySend);
}
}
if (JUSTASNIFFER)
{
log.Debug(string.Join(", ", receivedPacket.Select(b => string.Format("{0:X2} ", b))));
}
//PacketParser.HandleOutgoingPacket(receivedPacket, this.data, this.logger);
//CB gameguard id
//b1 net ping id
}
catch (Exception ex)
{
log.Debug(ex.ToString());
throw;
}
if (!shouldDropPacket)
{
_secondaryGamePacketObfuscator?.ObfuscatePacketForServer(receivedPacket);
_gamePacketObfuscator.ObfuscatePacketForServer(receivedPacket);
}
}
else if (!_isInit)
{
if (_gamePacketObfuscator == null && receivedPacket.Length > 100)
{
int version = BitConverter.ToInt32(receivedPacket.ToArray(), 3);
if (version >= 268 && version <= 272)
{
log.Debug($"Unsupported H5 client.");
}
//log.Debug(version);
if (!JUSTASNIFFER)
{
BotInstance.Init(version, this);
packetFactory = ProtocolFactory.CreatePacketFactory(version);
}
}
if (L2Injector.IsSGLoaded() && _gamePacketObfuscator is LegacyInGameCipher)
{
_gamePacketObfuscator = new SGInGameCipher(new byte[1], 0);
//placeholder args, since they are not needed in the alg
//if (!JUSTASNIFFER)
L2Injector.FillSGObject((SGInGameCipher)_gamePacketObfuscator);
//((SGInGameCipher)_gamePacketObfuscator).reverseCrypt(receivedPacket,((SGInGameCipher)_gamePacketObfuscator).clientKeySend);
//_gamePacketObfuscator.DeobfuscatePacketFromClient(receivedPacket);
_isInit = true;
}
}
//log.Debug("_0");
if (_secondaryGamePacketObfuscator == null && L2Injector.IsRpgClient() &&
_gamePacketObfuscator is LegacyInGameCipher)
{
_secondaryGamePacketObfuscator =
new RpgInGameCipher(((LegacyInGameCipher)_gamePacketObfuscator).DynamicKeyBytes, 0);
((RpgInGameCipher)_secondaryGamePacketObfuscator).SecretKey = L2Injector.GetRpgSecretKey();
}
// Send this packet to the server.
//log.Debug("_1");
if (!shouldDropPacket)
{
this.SendToServerRaw(receivedPacket);
}
}
// Begin listening for the next packet.
this.Client_BeginReceive();
//log.Debug("_5");
}
}
/**
* single receive, run in the receiverThread, see {@link #start()}
* <ul>
* <li>Receives UDP packets from the network</li>
* <li>Converts them to UDT packets</li>
* <li>dispatches the UDT packets according to their destination ID.</li>
* </ul>
* @throws IOException
*/
protected void DoReceive()
{
EndPoint remotePoint = new IPEndPoint(IPAddress.Any, 0);
while (!stopped)
{
try
{
try
{
//v.end();
//will block until a packet is received or timeout has expired
int len = dgSocket.ReceiveFrom(dp, ref remotePoint);
//v.begin();
Destination peer = new Destination(remotePoint);
IUDTPacket packet = PacketFactory.CreatePacket(dp, len);
lastPacket = packet;
//handle connection handshake
if (packet.IsConnectionHandshake())
{
lock (lock_obj)
{
long id = packet.DestinationID;
UDTSession session = null;
sessions.TryGetValue(id, out session);
if (session == null)
{
session = new ServerSession((IPEndPoint)remotePoint, this);
AddSession(session.SocketID, session);
//TODO need to check peer to avoid duplicate server session
if (serverSocketMode)
{
FlashLogger.Info("Pooling new request.");
sessionHandoff.Add(session);
FlashLogger.Info("Request taken for processing.");
}
}
peer.SocketID = ((ConnectionHandshake)packet).SocketID;
session.Received(packet, peer);
}
}
else
{
//dispatch to existing session
long dest = packet.DestinationID;
UDTSession session;
if (dest == lastDestID)
{
session = lastSession;
}
else
{
// session =
sessions.TryGetValue(dest, out session);//cd 获取session
lastSession = session;
lastDestID = dest;
}
if (session == null)
{
n++;
if (n % 100 == 1)
{
FlashLogger.Warn("Unknown session <" + dest + "> requested from <" + peer + "> packet type " + packet);
}
}
else
{
Console.WriteLine("收到包");
session.Received(packet, peer);
}
}
}
catch (SocketException ex)
{
if (ex.Message.Equals("socket closed") && stopped)
{
//cd
//已经正常关闭
}
else
{
FlashLogger.Info("SocketException: " + ex.Message);
}
}
catch (Exception ste)
{
//can safely ignore... we will retry until the endpoint is stopped
}
}
catch (Exception ex)
{
FlashLogger.Warn("Got: " + ex.Message, ex);
}
}
}
