private void onConnectRequestReceived(PeerSocket sender, string msgCode, Guid msgId, string senderId, string receiverId, List<object> data)
{
//step 1 - read the other-side address
string otherHost = (string)data[0];
int otherPort = (int)data[1];
//we use these to store info
string otherGatewayHost = (string) data[2];
int otherGatewayPort = (int)data[3];
logEvent("PM (" + gatewaySocket.ParentId + ") - Receive Connect Request - PeerAddress = " + otherHost+":"+otherPort.ToString() + ", PeerId = " + senderId);
//step 2 - create a client peer socket and connect to that address
PeerSocket myClientSocket = new PeerSocket(responseHandlers, gatewaySocket.ParentId, senderId, otherHost, otherPort);
//step 3 - check if client is connected successfully
if (!myClientSocket.IsConnected || (myClientSocket.PeerHost != otherHost) ||
(myClientSocket.PeerPort != otherPort))
{
myClientSocket.Dispose();
myClientSocket = null;
return;
}
//step 4 - add this client socket to peers
peers.Add(senderId, myClientSocket);
peersExpireDates[senderId] = DateTime.Now.AddMilliseconds(PeerMsgDef.HeartbeatValidness);
//step 5 - let sender know that I am connected
sender.SendMessageAsync(msgCode, msgId, true);
if (PeerConnected != null)
{
PeerConnected(senderId, true, otherGatewayHost, otherGatewayPort );
}
}
private void onDisconnectReceived(PeerSocket sender, string msgCode, Guid msgId, string senderId, string receiverId, List<object> data)
{
//if the sender is my gateway ignore this, as temp sockets will always disconnect from it ASAP
if (sender == gatewaySocket) return;
//dispose and remove my socket
sender.Dispose();
peers.Remove(senderId);
peersExpireDates.Remove(senderId);
if (PeerDisconnected != null)
{
//upon disconnect, we know host and port of peer
PeerDisconnected(senderId, false, null, -1);
}
}
public bool Connect(string host, int port, string peerId)
{
if (gatewaySocket == null) return false;
//step 1 - create a server peerSocket
PeerSocket myServerSocket = new PeerSocket(responseHandlers, gatewaySocket.ParentId, peerId);
//step 2 - create a temp client peer socket to send my address to the peer's gateway
PeerSocket tempClientSocket = new PeerSocket(responseHandlers, gatewaySocket.ParentId, peerId, host, port);
//step 3 - use temp client socket to send my server socket address to peer
List<object> response = null;
try
{
response = tempClientSocket.SendMessage(PeerMsgDef.ConnectMsgCode, myServerSocket.Host, myServerSocket.Port, gatewaySocket.Host, gatewaySocket.Port);
}
catch (Exception exc)
{
myServerSocket.Dispose();
myServerSocket = null;
throw;
}
finally
{
//step 4 - dispose temp socket
tempClientSocket.Dispose();
tempClientSocket = null;
}
//step 5 - was connect successfull?
if (response == null)
{
myServerSocket.Dispose();
myServerSocket = null;
return false;
}
//step 6 - extract address that peer has prepared for me (peer will connect to my server socket automatically)
bool done = (bool)response[0];
//step 7 - check correctness of the address
if (!myServerSocket.IsConnected || !done)
{
myServerSocket.Dispose();
myServerSocket = null;
return false;
}
//step 8 - store peer socket
peers.Add(peerId, myServerSocket);
peersExpireDates[peerId] = DateTime.Now.AddMilliseconds(PeerMsgDef.HeartbeatValidness);
logEvent("PM (" + gatewaySocket.ParentId + ") Connecting- PeerAddress = " + myServerSocket.PeerAddress + " PeerId = " + peerId);
return true;
}