public void GetNetwork()
{
var neighbours = File.ReadAllLines("NB.txt");
foreach (string n in neighbours)
{
NeighbourNodes.Add(int.Parse(n));
}
}
private void Receive()
{
while (_active)
{
// Make sure that we call the blocking Receive function
// only if there is data waiting
if (_udpReceive.Available == 0)
{
continue;
}
byte[] bytes = _udpReceive.Receive(ref _receiveEndPoint);
Packet receivedPacket = new Packet(bytes);
// Do not Process Packets if they are not coming from
// Physical Neighbours
if (!NeighbourNodes.Contains(receivedPacket.NodeSource))
{
continue;
}
// Do not Process packets when they already exists
// In previous seen packets
if (_previousSeenPackets[receivedPacket.NodeOriginalSource] >=
receivedPacket.NodeOriginalSourceCount)
{
continue;
}
_previousSeenPackets[receivedPacket.NodeOriginalSource] =
receivedPacket.NodeOriginalSourceCount;
// Check if Current Message is Broadcast Message
// Send Packet To All Neighbours
if (receivedPacket.NodeDestination == -1)
{
// Prepare Packet
Packet newPacket = PreparePacket(receivedPacket);
OnBroadcastMessageReceived(new MessageArgs(newPacket.NodeOriginalSource, newPacket.NodeDestination, newPacket.Info, newPacket.IsAcknoledgment == 1));
// Enqueue Packet for Send
_packetQueueToSend.Enqueue(newPacket);
newPacket.PrintBroadcastInfo();
}
else if (Id == receivedPacket.NodeDestination)
{
// My Message
// This Package is not Acknowledgment
if (receivedPacket.IsAcknoledgment != 1)
{
OnMessageReceived(new MessageArgs(receivedPacket.NodeOriginalSource, receivedPacket.NodeDestination, receivedPacket.Info, receivedPacket.IsAcknoledgment == 1));
#region Prepare Acknowledge Packet
Int64 timeCount = Utility.GetTimeCount();
Packet newPacket = new Packet()
{
NodeOriginalSource = Id,
NodeSource = Id,
NodeDestination = receivedPacket.NodeOriginalSource,
IsAcknoledgment = 1,
NodeOriginalSourceCount = timeCount,
AcknoledgmentCount = receivedPacket.NodeOriginalSourceCount,
InfoSize = 4
};
newPacket.Info = new byte[newPacket.InfoSize];
// Enqueue Packet for Send
_packetQueueToSend.Enqueue(newPacket);
newPacket.PrintAcknoledgmentInfo();
#endregion
}
else // Acknowledge
{
OnMessageAcknowledged(new MessageArgs(receivedPacket.NodeOriginalSource, receivedPacket.NodeDestination, receivedPacket.Info, receivedPacket.IsAcknoledgment == 1));
// Remove from List
lock (mutex)
{
Packet founded = null;
foreach (Packet p in _packetListForAcknoledge)
{
if (p.NodeOriginalSourceCount ==
receivedPacket.AcknoledgmentCount)
{
founded = p;
break;
}
}
if (founded != null)
{
_packetListForAcknoledge.Remove(founded);
}
}
}
}
else // Send to Next Node Hop
{
OnMessageRelayed(new MessageArgs(receivedPacket.NodeOriginalSource, receivedPacket.NodeDestination, receivedPacket.Info, receivedPacket.IsAcknoledgment == 1));
// Prepare Packet
Packet newPacket = PreparePacket(receivedPacket);
// Enqueue Packet for Send
_packetQueueToSend.Enqueue(newPacket);
newPacket.PrintRelayInfo();
}
}
}