void Initialize(ushort port)
{
// initialize native layer
int initialize = NativeBindings.network_initialize();
if (initialize == 0)
{
Debug.Log("network_initialized");
// create the socket and listen on IPv6 and IPv4 via DualMode
int error = 0;
byte[] bytes = IPAddress.IPv6Any.GetAddressBytes();
NetworkEndPoint address = NetworkEndPoint.CreateIPv6(bytes, port);
if (NativeBindings.network_create_socket(ref listener, ref address, ref error) == 0)
{
// try to enable dual mode to support both IPv6 and IPv4
if (NativeBindings.network_set_dualmode(listener, 1, ref error) != 0)
{
Debug.LogError("network_set_dualmode failed: " + (NativeError)error);
}
// bind the socket
if (NativeBindings.network_bind(listener, ref address, ref error) == 0)
{
// configure the socket
ConfigureSocket(listener);
}
else
{
Debug.LogError("network_bind failed: " + (NativeError)error);
}
}
else
{
Debug.LogError("network_create_socket failed: " + (NativeError)error);
}
}
else
{
Debug.LogError("network_initialize failed: " + initialize);
}
}
// try to accept the next connection
bool AcceptNext(out long socket)
{
socket = -1;
int error = 0;
NetworkEndPoint clientAddress = new NetworkEndPoint();
if (NativeBindings.network_accept(listener, ref socket, ref clientAddress, ref error) == 0)
{
//Debug.Log("network_accept: " + socket + " address=" + clientAddress);
return(true);
}
// log error if unusual
// (ignore EWOULDBLOCK, which is expected for nonblocking sockets)
// (http://www.workers.com.br/manuais/53/html/tcp53/mu/mu-7.htm)
else if ((NativeError)error != NativeError.EWOULDBLOCK)
{
Debug.LogError("network_accept failed: " + (NativeError)error);
}
return(false);
}
// the connect thread function
void ConnectThreadFunction(NetworkEndPoint address)
{
// absolutely must wrap with try/catch, otherwise thread
// exceptions are silent
try
{
// connect (blocking)
int error = 0;
if (NativeBindings.network_connect(socket, ref address, ref error) == 0)
{
// configure the socket
ConfigureSocket(socket);
// connect successful
// AFTER configuring the socket. so that we don't call recv
// while still blocking!
Debug.Log("[Client] connected!");
lock (this) { _Connected = true; }
}
// log errors if failed.
// (ECONNABORTED is expected if we call Disconnect while connecting)
else if ((NativeError)error != NativeError.ECONNABORTED)
{
Debug.LogError("network_connect failed: " + (NativeError)error);
}
}
catch (Exception exception)
{
// something went wrong. probably important.
Debug.LogError("[Client] Connect Exception: " + exception);
}
finally
{
// we definitely aren't connecting anymore. either it worked or
// it failed.
lock (this) { _Connecting = false; }
}
}
// client's ip is sometimes needed by the server, e.g. for bans
public unsafe string GetClientAddress(int connectionId)
{
// find the connection
if (clients.TryGetValue(connectionId, out ClientToken token) &&
token.socket != -1)
{
int error = 0;
// NetworkEndPoint NEEDS to be created with length, otherwise
// data array is empty and get_peer_address won't write into it
NetworkEndPoint address = new NetworkEndPoint {
length = sizeof(NetworkEndPoint)
};
if (NativeBindings.network_get_peer_address(token.socket, ref address, ref error) == 0)
{
return(address.Ip);
}
else
{
Debug.LogError("network_get_socket_address failed: " + (NativeError)error);
}
}
return("");
}
public void Connect(string hostname, ushort port)
{
// not if already started
if (Connecting || Connected)
{
return;
}
// create 'N' content buffers
contentBuffers = new byte[MaxReceivesPerTickPerConnection][];
for (int i = 0; i < contentBuffers.Length; ++i)
{
// create content buffer depending on configured MaxMessageSize
contentBuffers[i] = new byte[MaxMessageSize];
}
// reset state
lastConnected = false;
contentSize = 0;
// resolve host name (if hostname. otherwise it returns the IP)
// and connect to the first available address (IPv4 or IPv6)
// => GetHostAddresses is BLOCKING (for a very short time). we could
// move it to the ConnectThread, but it's hardly worth the extra
// code since we would have to create the socket in ConnectThread
// too, which would require us to use locks around socket every-
// where. it's better to live with a <1s block (if any).
try
{
IPAddress[] addresses = Dns.GetHostAddresses(hostname);
if (addresses.Length > 0)
{
// try to parse the IP
string ip = addresses[0].ToString();
if (NetworkEndPoint.TryParse(ip, port, out NetworkEndPoint address))
{
// create the socket
int error = 0;
if (NativeBindings.network_create_socket(ref socket, ref address, ref error) == 0)
{
// note: no need to enable DualMode because we
// connect to IPv4 or IPv6 depending on 'hostname'
// and then we don't reuse the socket.
// we are connecting
_Connecting = true; // thread isn't running, no lock needed!
Debug.Log("[Client] connecting to: " + ip);
// connect is blocking. let's call it in the thread and
// return immediately.
connectThread = new Thread(() => { ConnectThreadFunction(address); });
connectThread.IsBackground = true;
connectThread.Start();
}
else
{
Debug.LogError("network_create_socket failed: " + (NativeError)error);
}
}
else
{
Debug.LogError("[Client] Connect: failed to parse ip: " + ip + " port: " + port);
}
}
// it's not an error. just an invalid host so log a warning.
else
{
Debug.LogWarning("[Client] Connect: failed to resolve host: " + hostname + " (no address found)");
}
}
catch (SocketException exception)
{
// it's not an error. just an invalid host so log a warning.
Debug.LogWarning("[Client] Connect: failed to resolve host: " + hostname + " reason: " + exception);
}
}