public void ReceiveJoinDataPacket(JoinData packet)
{
if (!MessageCache.Contains(new MessagePrint(packet.SourceIp, packet.SequenceNumber)))
{
MessageCache.Add(new MessagePrint(packet.SourceIp, packet.SequenceNumber));
RoutingTable.Add(new RoutingTableElement(packet.SourceIp, packet.PreviousHopIp));
if (packet.MulticastGroupIp == NodeId)
{
JoinTable newJoinTablePacket = new JoinTable(packet.PreviousHopIp, packet.SequenceNumber, packet.SourceIp, NodeId, NodeId);
SendJoinTable(newJoinTablePacket);
}
else
{
JoinData newPacket = new JoinData(packet.TTL, packet.SequenceNumber, packet.SourceIp, NodeId, packet.MulticastGroupIp);
if (newPacket.SourceIp != NodeId)
{
newPacket.HopCount = packet.HopCount + 1;
newPacket.TTL--;
}
if (newPacket.TTL > 0)
{
SendJoinData(newPacket);
}
}
}
}
public void ReceiveJoinTablePacket(JoinTable packet)
{
if (NodeId == packet.NextHopIp)
{
ForwardingTable.Add(new ForwardingTableElement(packet.MulticastGroupIp));
if (NodeId == packet.SourceIp)
{
SendMessage(packet.MulticastGroupIp);
}
else
{
int nextHop = 0;
foreach (var a in RoutingTable)
{
if (a.SourceIp == packet.SourceIp)
{
nextHop = a.NextHop;
}
}
JoinTable newJoinTable = new JoinTable(nextHop, packet.SequenceNumber, packet.SourceIp, NodeId, packet.MulticastGroupIp);
SendJoinTable(newJoinTable);
}
}
}
private void SendJoinTable(JoinTable packet)
{
foreach (var nnode in NodeScanner.GetNearbyNodes(this, AllNodes))
{
new Thread(() =>
{
int timeElapsed = 0;
Thread.Sleep((int)(nnode.Key * 10) - timeElapsed);
timeElapsed += (int)(nnode.Key * 10);
Thread.CurrentThread.IsBackground = true;
nnode.Value.ReceiveJoinTablePacket(packet);
OnPacketSent(packet, new EventArgs());
}).Start();
}
}