private bool HandleSeed(NetState ns, ByteQueue buffer)
{
if (buffer.GetPacketID() == 0xEF)
{
// new packet in client 6.0.5.0 replaces the traditional seed method with a seed packet
// 0xEF = 239 = multicast IP, so this should never appear in a normal seed. So this is backwards compatible with older clients.
ns.Seeded = true;
return(true);
}
else if (buffer.Length >= 4)
{
byte[] m_Peek = new byte[4];
buffer.Dequeue(m_Peek, 0, 4);
int seed = (m_Peek[0] << 24) | (m_Peek[1] << 16) | (m_Peek[2] << 8) | m_Peek[3];
if (seed == 0)
{
Console.WriteLine("Login: {0}: Invalid client detected, disconnecting", ns);
ns.Dispose();
return(false);
}
ns.m_Seed = seed;
ns.Seeded = true;
return(true);
}
else
{
return(false);
}
}
public void HandleReceive(NetState ns)
{
ByteQueue buffer = ns.Buffer;
if (buffer == null || buffer.Length <= 0)
{
return;
}
lock (buffer)
{
if (!ns.Seeded)
{
if (!HandleSeed(ns, buffer))
{
return;
}
}
int length = buffer.Length;
while (length > 0 && ns.Running)
{
int packetID = buffer.GetPacketID();
if (CheckEncrypted(ns, packetID))
{
break;
}
PacketHandler handler = ns.GetHandler(packetID);
if (handler == null)
{
byte[] data = new byte[length];
length = buffer.Dequeue(data, 0, length);
new PacketReader(data, length, false).Trace(ns);
break;
}
int packetLength = handler.Length;
if (packetLength <= 0)
{
if (length >= 3)
{
packetLength = buffer.GetPacketLength();
if (packetLength < 3)
{
ns.Dispose();
break;
}
}
else
{
break;
}
}
if (length >= packetLength)
{
if (handler.Ingame)
{
if (ns.Mobile == null)
{
Console.WriteLine("Client: {0}: Sent ingame packet (0x{1:X2}) before having been attached to a mobile", ns, packetID);
ns.Dispose();
break;
}
else if (ns.Mobile.Deleted)
{
ns.Dispose();
break;
}
}
ThrottlePacketCallback throttler = handler.ThrottleCallback;
if (throttler != null && !throttler(ns))
{
m_Throttled.Enqueue(ns);
return;
}
PacketReceiveProfile prof = null;
if (Core.Profiling)
{
prof = PacketReceiveProfile.Acquire(packetID);
}
if (prof != null)
{
prof.Start();
}
byte[] packetBuffer;
if (BufferSize >= packetLength)
{
packetBuffer = m_Buffers.AcquireBuffer();
}
else
{
packetBuffer = new byte[packetLength];
}
packetLength = buffer.Dequeue(packetBuffer, 0, packetLength);
PacketReader r = new PacketReader(packetBuffer, packetLength, handler.Length != 0);
handler.OnReceive(ns, r);
length = buffer.Length;
if (BufferSize >= packetLength)
{
m_Buffers.ReleaseBuffer(packetBuffer);
}
if (prof != null)
{
prof.Finish(packetLength);
}
}
else
{
break;
}
}
}
}