protected override void Execute()
{
var peer = _peer;
var networkStream = peer.NetworkStream;
var networkType = peer.NetworkType;
var sharedSecretBytes = peer.SharedSecretBytes;
var packetsToSend = peer._packetsToSend;
var cancellationToken = _cancellationToken;
while (!cancellationToken.IsCancellationRequested)
{
try
{
using var pingTimeout = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
pingTimeout.CancelAfter(Thread.VolatileRead(ref peer.KeepAliveDuration));
var packetToSend = packetsToSend.Take(pingTimeout.Token);
packetToSend.WriteDelimitedTo(_peer.NetworkStream);
}
catch (OperationCanceledException ex)
{
if (ex.CancellationToken == cancellationToken)
{
return;
}
// Timeout caused by ping duration.
var packet = PacketUtility.SerializePacket(new PingPacket(), networkType, sharedSecretBytes);
packet.WriteDelimitedTo(networkStream);
}
catch (IOException)
{
// Either the network has closed or write timeout has been triggered due to no response from the client.
// TODO: Disconnect peer.
}
}
}
