bool UNetworkManager::Start(int32 InPortNum) // Restart the server if configuration changed
{
if (InPortNum == this->PortNum && this->bIsListening) return true; // Already started
if (ConnectionSocket) // Release previous connection
{
ConnectionSocket->Close();
ConnectionSocket = NULL;
}
if (TcpListener) // Delete previous configuration first
{
UE_LOG(LogUnrealCV, Warning, TEXT("Stop previous server"));
TcpListener->Stop(); // TODO: test the robustness, will this operation successful?
delete TcpListener;
}
this->PortNum = InPortNum; // Start a new TCPListener
FIPv4Address IPAddress = FIPv4Address(0, 0, 0, 0);
// int32 PortNum = this->PortNum; // Make this configuable
FIPv4Endpoint Endpoint(IPAddress, PortNum);
FSocket* ServerSocket = FTcpSocketBuilder(TEXT("FTcpListener server")) // TODO: Need to realease this socket
// .AsReusable()
.BoundToEndpoint(Endpoint)
.Listening(8);
if (ServerSocket)
{
int32 NewSize = 0;
ServerSocket->SetReceiveBufferSize(2 * 1024 * 1024, NewSize);
}
else
{
this->bIsListening = false;
UE_LOG(LogUnrealCV, Warning, TEXT("Cannot start listening on port %d, Port might be in use"), PortNum);
return false;
}
TcpListener = new FTcpListener(*ServerSocket);
// TcpListener = new FTcpListener(Endpoint); // This will be released after start
// In FSocket, when a FSocket is set as reusable, it means SO_REUSEADDR, not SO_REUSEPORT. see SocketsBSD.cpp
TcpListener->OnConnectionAccepted().BindUObject(this, &UNetworkManager::Connected);
if (TcpListener->Init())
{
this->bIsListening = true;
UE_LOG(LogUnrealCV, Warning, TEXT("Start listening on %d"), PortNum);
return true;
}
else
{
this->bIsListening = false;
UE_LOG(LogUnrealCV, Error, TEXT("Can not start listening on port %d"), PortNum);
return false;
}
}
