Is UDP receive with FSocket currently working? I’ve been trying several different UDP socket setups with general & specific IP/port settings for both socket creation and the RecvFrom address; I can’t get any data on the socket no matter what. I know that my test data is going to the correct IP & port (checked it with Wireshark), but HasPendingData() always indicates an empty socket.
Socket setup
FIPv4Endpoint Endpoint(FIPv4Address::Any, 9001);
FSocket *ReceiverSocket = FUdpSocketBuilder(*SocketName)
.AsNonBlocking()
.AsReusable()
.BoundToEndpoint(Endpoint)
.WithReceiveBufferSize(2 * 1024 * 1024);
RecvFrom call (in a timer function)
TSharedRef<FInternetAddr> targetAddr = ISocketSubsystem::Get(PLATFORM_SOCKETSUBSYSTEM)->CreateInternetAddr();
TArray<uint8> ReceivedData;
uint32 Size;
while (ReceiverSocket->HasPendingData(Size))
{
ReceivedData.SetNumUninitialized(FMath::Min(Size, 65507u));
int32 Read = 0;
ReceiverSocket->RecvFrom(ReceivedData.GetData(), ReceivedData.Num(), Read, *targetAddr);
}
One thing odd I noticed is that, according to netstat, the UE4 Editor is opening a UDP socket on my receiver’s port as soon as the Editor loads my project. It creates the one I expected once I start the game (my receiver class is spawned in GameMode’s constructor). The socket created in GameMode is cleaned up when I exit the game, but the Editor-created one doesn’t close until I close the Editor.