public void ReceiveCommPacket(G2ReceivedPacket raw, RudpPacket packet)
{
try
{
if (packet.PacketType == RudpPacketType.Light ||
packet.PacketType == RudpPacketType.LightAck)
{
LightComm.ReceivePacket(raw, packet);
return;
}
// if a socket already set up
lock (RudpControl.SocketMap)
if (RudpControl.SocketMap.ContainsKey(packet.PeerID))
{
RudpControl.SocketMap[packet.PeerID].RudpReceive(raw, packet, IsLookup);
return;
}
// if starting new session
if (packet.PacketType != RudpPacketType.Syn)
return;
RudpSyn syn = new RudpSyn(packet.Payload);
// prevent connection from self
if (syn.SenderID == Local.UserID && syn.ClientID == Local.ClientID)
return;
// find connecting session with same or unknown client id
ulong id = syn.SenderID ^ syn.ClientID;
if (RudpControl.SessionMap.ContainsKey(id))
{
RudpSession session = RudpControl.SessionMap[id];
// if session id zero or matches forward
if ((session.Comm.State == RudpState.Connecting && session.Comm.RemotePeerID == 0) ||
(session.Comm.State != RudpState.Closed && session.Comm.RemotePeerID == syn.ConnID)) // duplicate syn
{
session.Comm.RudpReceive(raw, packet, IsLookup);
return;
}
else if (session.Comm.State == RudpState.Finishing)
{
RudpControl.RemoveSession(session);
// remove session, allow new one to be created
}
else
return;
}
// if clientid not in session, create new session
RudpSession newSession = new RudpSession(RudpControl, syn.SenderID, syn.ClientID, true);
RudpControl.SessionMap[id] = newSession;
// send ack before sending our own syn (connect)
// ack tells remote which address is good so that our syn's ack comes back quickly
newSession.Comm.RudpReceive(raw, packet, IsLookup);
newSession.Connect();
UpdateLog("RUDP", "Inbound session accepted to ClientID " + syn.ClientID.ToString());
}
catch (Exception ex)
{
UpdateLog("Exception", "DhtNetwork::ReceiveCommPacket: " + ex.Message);
}
}
void ReceiveSyn(RudpPacket packet)
{
RudpSyn syn = new RudpSyn(packet.Payload);
if(RemotePeerID == 0)
RemotePeerID = syn.ConnID;
//Session.Log("Syn Recv, Seq " + packet.Sequence.ToString() + ", ID " + syn.ConnID.ToString());
SendAck(packet); // send ack here also because peerID now set
SynAckSent = true;
if(SynAckSent && SynAckReceieved)
{
Session.Log("Connected (recv syn)");
ChangeState(RudpState.Connected);
SetConnected();
}
}