protected virtual bool ResponseAuthentication(SkylakeNATClient socket, IPAddress local, IPAddress dhcp, IPAddress dns)
{
byte[] message = new byte[sizeof(NATAuthenticationResponse)];
fixed(byte *pinned = message)
{
NATAuthenticationResponse *response = (NATAuthenticationResponse *)pinned;
response->dhcp.local = (uint)Ethernet.GetAddress(local);
response->dhcp.dhcp = (uint)Ethernet.GetAddress(dhcp);
response->dhcp.dns = (uint)Ethernet.GetAddress(dns);
}
socket.Address = local;
return(socket.Send(new SkylakeNATMessage(new BufferSegment(message))
{
Commands = Commands.NATCommands_kAuthentication,
}));
}
public Router(IPAddress ethernet, int port, string key, int subtract)
{
if (ethernet == null)
{
throw new ArgumentNullException("It is not allowed to specify an ethernet card address with a null value");
}
if (IPEndPoint.MinPort >= port || port > IPEndPoint.MaxPort)
{
throw new ArgumentOutOfRangeException($"The port used to connect to the server is less than or equal to {IPEndPoint.MinPort} or greater than {IPEndPoint.MaxPort}");
}
this.Port = port;
this.Key = key;
this.Subtract = subtract;
#if !__USE_UDP_PAYLOAD_TAP_PACKET
this._server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
this._server.NoDelay = true;
this._server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
#else
this._server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
this._server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
#endif
this._server.Bind(new IPEndPoint(ethernet, port));
this._onSocketAbort = (sender, e) =>
{
if (sender is SkylakeNATClient socket)
{
socket.Close();
if (socket.Address != null)
{
lock (this._sockets)
{
bool deleteCompletely = false;
if (_sockets.TryGetValue(socket.Address, out LinkedList <SkylakeNATClient> s))
{
if (s == null)
{
deleteCompletely = true;
}
else
{
var node = socket._rsv_current;
if (node != null)
{
var l = node.List;
if (l != null)
{
l.Remove(node);
}
socket._rsv_current = null;
}
if (s.Count <= 0)
{
deleteCompletely = true;
}
}
}
if (deleteCompletely)
{
_sockets.TryRemove(socket.Address, out s);
lock (_addressAllocation)
{
_addressAllocation.TryRemove(socket.Id, out IPAddress address_x);
if (socket.Address != null)
{
_assignedAddresses.Remove(socket.Address);
}
else if (address_x != null)
{
_assignedAddresses.Remove(address_x);
}
}
}
}
this.ProcessAbort(socket);
}
}
};
this._onSocketMessage = (sender, e) =>
{
if (sender is SkylakeNATClient socket)
{
this.ProcessMessage(socket, e);
}
};
this._onAuthentication = (sender, e) =>
{
if (sender is SkylakeNATClient socket)
{
this.ProcessAuthentication(socket);
}
};
// 建立以太网NAT链路工作引擎
#if NO_USAGE_PCAP_NET
this.Ethernet = new Ethernet(ethernet, false);
#else
this.Ethernet = new Ethernet(ethernet, true);
#endif
this.NAT = new NAT(this.Ethernet.GetEthernetAddress());
// 建立以太网NAT传入传出链路
this.NAT.PublicOutput += (sender, e) => this.Ethernet.Output(e);
this.NAT.PrivateOutput += (seder, e) => this.PrivateOutput(e);
this.Ethernet.PublicInput += (sender, e) => this.NAT.PublicInput(e);
#if __USE_UDP_PAYLOAD_TAP_PACKET
this._doAgingswNatClientContextTimer = new Timer();
this._doAgingswNatClientContextTimer.Elapsed += (sender, e) =>
{
foreach (var kv in _natClientTable)
{
bool freely = false;
var context = kv.Value;
if (context == null)
{
freely = true;
}
else
{
SkylakeNATClient clients = null;
lock (context)
{
if (context.agingsw.ElapsedMilliseconds >= 10000)
{
freely = true;
clients = context.client;
}
}
clients?.OnAbort(EventArgs.Empty);
}
if (freely)
{
lock (this._sockets)
{
SkylakeNATClient clients = context.client;
if (clients != null)
{
IPAddress address = IPAddress.Any;
lock (_addressAllocation)
{
_addressAllocation.TryRemove(clients.Id, out address);
if (address == null)
{
address = clients.Address;
}
if (address != null && !Ethernet.Equals(address, IPAddress.Any))
{
_assignedAddresses.Remove(address);
_sockets.TryRemove(address, out LinkedList <SkylakeNATClient> linkedlist_xx);
}
}
}
_natClientTable.TryRemove(kv.Key, out NATClientContext context_xx);
}
}
}
};
this._doAgingswNatClientContextTimer.Interval = 500;
this._doAgingswNatClientContextTimer.Start();
#endif
}
