private bool BindSocket(Socket socket, IPEndPoint ep, bool reuseAddress, IPv6Mode ipv6Mode)
{
//Setup socket
socket.ReceiveTimeout = 500;
socket.SendTimeout = 500;
socket.ReceiveBufferSize = NetConstants.SocketBufferSize;
socket.SendBufferSize = NetConstants.SocketBufferSize;
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
try
{
socket.IOControl(SioUdpConnreset, new byte[] { 0 }, null);
}
catch
{
//ignored
}
}
try
{
socket.ExclusiveAddressUse = !reuseAddress;
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, reuseAddress);
}
catch
{
//Unity with IL2CPP throws an exception here, it doesn't matter in most cases so just ignore it
}
if (ep.AddressFamily == AddressFamily.InterNetwork || ipv6Mode == IPv6Mode.DualMode)
{
Ttl = NetConstants.SocketTTL;
try { socket.EnableBroadcast = true; }
catch (SocketException e)
{
NetDebug.WriteError($"[B]Broadcast error: {e.SocketErrorCode}");
}
if (ipv6Mode == IPv6Mode.DualMode)
{
try { socket.DualMode = true; }
catch (Exception e)
{
NetDebug.WriteError($"[B]Bind exception (dualmode setting): {e}");
}
}
else if (!RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
try { socket.DontFragment = true; }
catch (SocketException e)
{
NetDebug.WriteError($"[B]DontFragment error: {e.SocketErrorCode}");
}
}
}
//Bind
try
{
socket.Bind(ep);
NetDebug.Write(NetLogLevel.Trace, $"[B]Successfully binded to port: {((IPEndPoint)socket.LocalEndPoint).Port}, AF: {socket.AddressFamily}");
//join multicast
if (ep.AddressFamily == AddressFamily.InterNetworkV6)
{
try
{
#if !UNITY_2018_3_OR_NEWER
socket.SetSocketOption(
SocketOptionLevel.IPv6,
SocketOptionName.AddMembership,
new IPv6MulticastOption(MulticastAddressV6));
#endif
}
catch (Exception)
{
// Unity3d throws exception - ignored
}
}
}
catch (SocketException bindException)
{
switch (bindException.SocketErrorCode)
{
//IPv6 bind fix
case SocketError.AddressAlreadyInUse:
if (socket.AddressFamily == AddressFamily.InterNetworkV6 && ipv6Mode != IPv6Mode.DualMode)
{
try
{
//Set IPv6Only
socket.DualMode = false;
socket.Bind(ep);
}
catch (SocketException ex)
{
//because its fixed in 2018_3
NetDebug.WriteError($"[B]Bind exception: {ex}, errorCode: {ex.SocketErrorCode}");
return(false);
}
return(true);
}
break;
//hack for iOS (Unity3D)
case SocketError.AddressFamilyNotSupported:
return(true);
}
NetDebug.WriteError($"[B]Bind exception: {bindException}, errorCode: {bindException.SocketErrorCode}");
return(false);
}
return(true);
}
private bool BindSocket(Socket socket, IPEndPoint ep, bool reuseAddress, IPv6Mode ipv6Mode)
{
//Setup socket
socket.ReceiveTimeout = 500;
socket.SendTimeout = 500;
socket.ReceiveBufferSize = NetConstants.SocketBufferSize;
socket.SendBufferSize = NetConstants.SocketBufferSize;
#if !UNITY || UNITY_EDITOR_WIN || UNITY_STANDALONE_WIN
#if NETSTANDARD || NETCOREAPP
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
#endif
try
{
socket.IOControl(SioUdpConnreset, new byte[] { 0 }, null);
}
catch
{
//ignored
}
#endif
try
{
socket.ExclusiveAddressUse = !reuseAddress;
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, reuseAddress);
}
catch
{
//Unity with IL2CPP throws an exception here, it doesn't matter in most cases so just ignore it
}
if (socket.AddressFamily == AddressFamily.InterNetwork)
{
Ttl = NetConstants.SocketTTL;
#if NETSTANDARD || NETCOREAPP
if (!RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
#endif
try { socket.DontFragment = true; }
catch (SocketException e)
{
NetDebug.WriteError("[B]DontFragment error: {0}", e.SocketErrorCode);
}
try { socket.EnableBroadcast = true; }
catch (SocketException e)
{
NetDebug.WriteError("[B]Broadcast error: {0}", e.SocketErrorCode);
}
}
else //IPv6 specific
{
if (ipv6Mode == IPv6Mode.DualMode)
{
try
{
//Disable IPv6 only mode
socket.SetSocketOption(SocketOptionLevel.IPv6, (SocketOptionName)27, false);
}
catch (Exception e)
{
NetDebug.WriteError("[B]Bind exception (dualmode setting): {0}", e.ToString());
}
}
}
//Bind
try
{
socket.Bind(ep);
NetDebug.Write(NetLogLevel.Trace, "[B]Successfully binded to port: {0}", ((IPEndPoint)socket.LocalEndPoint).Port);
//join multicast
if (socket.AddressFamily == AddressFamily.InterNetworkV6)
{
try
{
#if !UNITY
socket.SetSocketOption(
SocketOptionLevel.IPv6,
SocketOptionName.AddMembership,
new IPv6MulticastOption(MulticastAddressV6));
#endif
}
catch (Exception)
{
Console.WriteLine("// Unity3d throws exception - ignored");
}
}
}
catch (SocketException bindException)
{
switch (bindException.SocketErrorCode)
{
//IPv6 bind fix
case SocketError.AddressAlreadyInUse:
if (socket.AddressFamily == AddressFamily.InterNetworkV6 && ipv6Mode != IPv6Mode.DualMode)
{
try
{
//Set IPv6Only
socket.SetSocketOption(SocketOptionLevel.IPv6, (SocketOptionName)27, true);
socket.Bind(ep);
}
#if UNITY_2018_3_OR_NEWER
catch (SocketException ex)
{
//because its fixed in 2018_3
NetDebug.WriteError("[B]Bind exception: {0}, errorCode: {1}", ex.ToString(), ex.SocketErrorCode);
#else
catch (SocketException)
{
#endif
return(false);
}
return(true);
}
break;
//hack for iOS (Unity3D)
case SocketError.AddressFamilyNotSupported:
return(true);
}
NetDebug.WriteError("[B]Bind exception: {0}, errorCode: {1}", bindException.ToString(), bindException.SocketErrorCode);
return(false);
}
return(true);
}
public bool Bind(IPAddress addressIPv4, IPAddress addressIPv6, int port, bool reuseAddress, IPv6Mode ipv6Mode, bool manualMode)
{
if (IsActive())
{
return(false);
}
_useNativeSockets = _listener.UseNativeSockets && NativeSocket.IsSupported;
bool dualMode = ipv6Mode == IPv6Mode.DualMode && IPv6Support;
_udpSocketv4 = new Socket(
dualMode ? AddressFamily.InterNetworkV6 : AddressFamily.InterNetwork,
SocketType.Dgram,
ProtocolType.Udp);
if (!BindSocket(_udpSocketv4, new IPEndPoint(dualMode ? addressIPv6 : addressIPv4, port), reuseAddress, ipv6Mode))
{
return(false);
}
LocalPort = ((IPEndPoint)_udpSocketv4.LocalEndPoint).Port;
#if UNITY_IOS && !UNITY_EDITOR
if (_unitySocketFix == null)
{
var unityFixObj = new GameObject("LiteNetLib_UnitySocketFix");
GameObject.DontDestroyOnLoad(unityFixObj);
_unitySocketFix = unityFixObj.AddComponent <UnitySocketFix>();
_unitySocketFix.Socket = this;
_unitySocketFix.BindAddrIPv4 = addressIPv4;
_unitySocketFix.BindAddrIPv6 = addressIPv6;
_unitySocketFix.Reuse = reuseAddress;
_unitySocketFix.Port = LocalPort;
_unitySocketFix.IPv6 = ipv6Mode;
_unitySocketFix.ManualMode = manualMode;
}
else
{
_unitySocketFix.Paused = false;
}
#endif
if (dualMode)
{
_udpSocketv6 = _udpSocketv4;
}
IsRunning = true;
if (!manualMode)
{
ParameterizedThreadStart ts = ReceiveLogic;
if (_useNativeSockets)
{
ts = NativeReceiveLogic;
}
_threadv4 = new Thread(ts)
{
Name = $"SocketThreadv4({LocalPort})",
IsBackground = true
};
_threadv4.Start(_udpSocketv4);
}
else
{
_bufferEndPointv4 = new IPEndPoint(IPAddress.Any, 0);
}
//Check IPv6 support
if (!IPv6Support || ipv6Mode != IPv6Mode.SeparateSocket)
{
return(true);
}
_udpSocketv6 = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp);
//Use one port for two sockets
if (BindSocket(_udpSocketv6, new IPEndPoint(addressIPv6, LocalPort), reuseAddress, ipv6Mode))
{
if (manualMode)
{
_bufferEndPointv6 = new IPEndPoint(IPAddress.IPv6Any, 0);
}
else
{
ParameterizedThreadStart ts = ReceiveLogic;
if (_useNativeSockets)
{
ts = NativeReceiveLogic;
}
_threadv6 = new Thread(ts)
{
Name = $"SocketThreadv6({LocalPort})",
IsBackground = true
};
_threadv6.Start(_udpSocketv6);
}
}
return(true);
}
public bool Bind(IPAddress addressIPv4, IPAddress addressIPv6, int port, bool reuseAddress, IPv6Mode ipv6Mode)
{
if (IsActive())
{
return(false);
}
bool dualMode = ipv6Mode == IPv6Mode.DualMode && IPv6Support;
_udpSocketv4 = new Socket(
dualMode ? AddressFamily.InterNetworkV6 : AddressFamily.InterNetwork,
SocketType.Dgram,
ProtocolType.Udp);
if (!BindSocket(_udpSocketv4, new IPEndPoint(dualMode ? addressIPv6 : addressIPv4, port), reuseAddress, ipv6Mode))
{
return(false);
}
#if UNITY_IOS && !UNITY_EDITOR
if (_unitySocketFix == null)
{
var unityFixObj = new GameObject("LiteNetLib_UnitySocketFix");
GameObject.DontDestroyOnLoad(unityFixObj);
_unitySocketFix = unityFixObj.AddComponent <UnitySocketFix>();
_unitySocketFix.Socket = this;
_unitySocketFix.BindAddrIPv4 = addressIPv4;
_unitySocketFix.BindAddrIPv6 = addressIPv6;
_unitySocketFix.Reuse = reuseAddress;
_unitySocketFix.Port = port;
_unitySocketFix.IPv6 = ipv6Mode;
}
#endif
if (dualMode)
{
_udpSocketv6 = _udpSocketv4;
}
LocalPort = ((IPEndPoint)_udpSocketv4.LocalEndPoint).Port;
IsRunning = true;
_threadv4 = new Thread(ReceiveLogic)
{
Name = "SocketThreadv4(" + LocalPort + ")",
IsBackground = true
};
_threadv4.Start(_udpSocketv4);
//Check IPv6 support
if (!IPv6Support || ipv6Mode != IPv6Mode.SeparateSocket)
{
return(true);
}
_udpSocketv6 = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp);
//Use one port for two sockets
if (BindSocket(_udpSocketv6, new IPEndPoint(addressIPv6, LocalPort), reuseAddress, ipv6Mode))
{
_threadv6 = new Thread(ReceiveLogic)
{
Name = "SocketThreadv6(" + LocalPort + ")",
IsBackground = true
};
_threadv6.Start(_udpSocketv6);
}
return(true);
}
