/// <summary>
/// Deserializes a packet from the given buffer. Returns the amount of bytes consumed.
/// </summary>
private int DeserializePacket(IntPtr buffer)
{
PacketHeader packetHeader = (PacketHeader)Marshal.PtrToStructure(buffer, typeof(PacketHeader));
//Get the type for the packet sitting in the receive buffer
Type packetType = PacketMap.GetTypeForPacketCode(packetHeader.OpCode);
//If we can deserialize it...
if (packetType != null)
{
try
{
//Block copy the buffer to a struct of the correct type
IPacketBase packet = (IPacketBase)Marshal.PtrToStructure(buffer, packetType);
//Throw the strongly-typed packet into the incoming queue
m_incomingQueue.Enqueue(packet);
return(packet.Header.SizeInBytes);
}
catch (Exception ex)
{
Console.Write("Deserialization error! " + ex);
}
}
else
{
Console.WriteLine("Bad packet code: " + packetHeader.OpCode);
}
return(0);
}
/// <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>
/// 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>
/// 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)
{
PushState 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)
{
RequestZoneTransfer request = (RequestZoneTransfer)packet;
m_world.ZoneManager.RequestZoneTransfer(this, request.ZoneID);
}
//Resolve names
else if (packet is WhoisRequest)
{
WhoisRequest request = (WhoisRequest)packet;
WhoisResponse response = PacketFactory.CreatePacket<WhoisResponse>();
response.WorldID = request.WorldID;
string name = m_world.GetNameForWorldID(request.WorldID);
TextHelpers.StringToBuffer(name, response.Name, name.Length);
DeferredSendPacket(response);
}
}
/// <summary>
/// Serialize the given packet into the send buffer.
/// </summary>
protected void SerializePacket(IPacketBase packet)
{
try {
Marshal.StructureToPtr(packet, mSendBufferPtr, false);
} catch (Exception ex) {
Console.WriteLine("Serialization error! " + ex);
}
}
/// <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>
/// Queues a packet to be send on the next update. Will coalesce these packets together.
/// </summary>
public void DeferredSendPacket(IPacketBase packet)
{
if (!mCurrentDeferredPacket.TryAddPacket(packet))
{
mDeferredSendList.Add(mCurrentDeferredPacket);
mCurrentDeferredPacket = PacketFactory.CreatePacket <CoalescedData>();
mCurrentDeferredPacket.TryAddPacket(packet);
}
}
public bool Read( IPacketBase UnitPacket )
{
// General Key
if( false == UnitPacket.Read( out GeneralKey ) )
return false;
// TODO: 로그인 성공했을 때 서버로부터 받는 키 값이 제대로 읽혀진 것인지 확인할 것
return true;
}
public bool Write( IPacketBase UnitPacket )
{
// General Key
if( false == UnitPacket.Write( GeneralKey ) )
return false;
// TODO: 로그인 성공했을 때 서버로부터 받는 키 값이 제대로 쓰여진 것인지 확인할 것
return true;
}
/// <summary>
/// Enqueue a packet for sending over the wire
/// </summary>
public void SendPacket(IPacketBase packet)
{
mOutgoingQueue.Enqueue(packet);
//If we're not already sending, queue up a send on the task pool
if (Interlocked.Read(ref mSending) == 0)
{
QueueSend();
}
}
/// <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;
}
}
}
/// <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;
}
}
}
/// <summary>
/// Try to add a <paramref name="packet" /> into the buffer. Returns
/// <see langword="true" /> if the <paramref name="packet" /> was
/// successfully copied.
/// </summary>
public bool TryAddPacket(IPacketBase packet) {
fixed (byte* buf = DataBuffer) {
int packetSize = packet.Header.SizeInBytes;
if (mUsedBytes + packetSize < BUFFER_SIZE) {
//Copy packet into buffer
Marshal.StructureToPtr(packet, (IntPtr)(buf + mUsedBytes), false);
//Update used bytes and packet count
mUsedBytes += (short)packetSize;
mPacketCount++;
//Update actual size
mHeader.SizeInBytes = (short)(Marshal.SizeOf(this) - BUFFER_SIZE + mUsedBytes);
return true;
}
}
return false;
}
/// <summary>
/// Poll the outgoing queue and send any packets
/// </summary>
private void Send()
{
IPacketBase packet = null;
//Grab a packet to send
while (!m_outgoingQueue.TryDequeue(out packet))
{
Thread.Sleep(0);
}
//Bail out if we lost connection
if (!m_socket.Connected)
{
return;
}
//Serialize the packet into the send buffer
SerializePacket(packet);
try
{
//Send packet bytes over the wire
m_sendArgs.SetBuffer(m_sendArgs.Offset, packet.Header.SizeInBytes);
if (!m_socket.SendAsync(m_sendArgs))
{
SendCompleted(m_socket, m_sendArgs);
}
}
catch (SocketException)
{
//Client disconnect
}
catch (Exception ex)
{
Console.WriteLine("Send error! " + ex);
}
}
/// <summary>
/// Try to add a packet into the buffer. Returns true if the packet was successfully copied.
/// </summary>
public bool TryAddPacket(IPacketBase packet)
{
fixed(byte *buf = DataBuffer)
{
int packetSize = packet.Header.SizeInBytes;
if (m_usedBytes + packetSize < BUFFER_SIZE)
{
//Copy packet into buffer
Marshal.StructureToPtr(packet, (IntPtr)(buf + m_usedBytes), false);
//Update used bytes and packet count
m_usedBytes += (short)packetSize;
m_packetCount++;
//Update actual size
m_header.SizeInBytes = (short)(Marshal.SizeOf(this) - BUFFER_SIZE + m_usedBytes);
return(true);
}
}
return(false);
}
/// <summary>
/// Enqueue a packet for sending over the wire
/// </summary>
public void SendPacket(IPacketBase packet)
{
m_outgoingQueue.Enqueue(packet);
//If we're not already sending, queue up a send on the task pool
if (Interlocked.Read(ref sending) == 0)
{
QueueSend();
}
}
public bool Read( IPacketBase UnitPacket )
{
int Length = 0;
char[] Temp = null;
// ID
UnitPacket.Read( out Length );
if( false == UnitPacket.Read( out Temp, Length ) )
return false;
ID = new string( Temp );
Length = 0;
Temp = null;
// Password
UnitPacket.Read( out Length );
if( false == UnitPacket.Read( out Temp, Length ) )
return false;
Password = new string( Temp );
// TODO: ID, Password가 제대로 읽혀진 것인지 확인할 것
return true;
}
public bool Write( IPacketBase UnitPacket )
{
// ID
if( false == UnitPacket.Write( ID.Length ) )
return false;
if( false == UnitPacket.Write( ID.ToCharArray(), ID.Length ) )
return false;
// Password
if( false == UnitPacket.Write( Password.Length ) )
return false;
if( false == UnitPacket.Write( Password.ToCharArray(), Password.Length ) )
return false;
// TODO: ID, Password가 제대로 쓰여진 것인지 확인할 것
return true;
}
/// <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);
}
}
/// <summary>
/// Serialize the given packet into the send buffer.
/// </summary>
private void SerializePacket(IPacketBase packet)
{
try
{
Marshal.StructureToPtr(packet, m_sendBufferPtr, false);
}
catch (Exception ex)
{
Console.WriteLine("Serialization error! " + ex);
}
}
/// <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);
}
}