/// <summary>
/// Establish this connection
/// </summary>
public void EstablishConnection()
{
try
{
bool connectionAlreadyEstablishing = false;
lock (_syncRoot)
{
if (ConnectionInfo.ConnectionState == ConnectionState.Established)
{
return;
}
else if (ConnectionInfo.ConnectionState == ConnectionState.Shutdown)
{
throw new ConnectionSetupException("Attempting to re-establish a closed connection. Please create a new connection instead.");
}
else if (ConnectionInfo.ConnectionState == ConnectionState.Establishing)
{
connectionAlreadyEstablishing = true;
}
else
{
ConnectionInfo.NoteStartConnectionEstablish();
}
}
if (connectionAlreadyEstablishing)
{
if (NetworkComms.LoggingEnabled)
{
NetworkComms.Logger.Trace("Waiting for connection with " + ConnectionInfo + " to be established.");
}
if (!WaitForConnectionEstablish(NetworkComms.ConnectionEstablishTimeoutMS))
{
throw new ConnectionSetupException("Timeout waiting for connection to be successfully established.");
}
}
else
{
if (NetworkComms.LoggingEnabled)
{
NetworkComms.Logger.Trace("Establishing new connection with " + ConnectionInfo);
}
EstablishConnectionSpecific();
if (ConnectionInfo.ConnectionState == ConnectionState.Shutdown)
{
throw new ConnectionSetupException("Connection was closed immediately after handshake. This can occur if a different thread used and subsequently closed this connection.");
}
//Once the above has been done the last step is to allow other threads to use the connection
ConnectionInfo.NoteCompleteConnectionEstablish();
//Not all connection types will have a known remote network identifier
if (ConnectionInfo.NetworkIdentifier != ShortGuid.Empty)
{
NetworkComms.AddConnectionReferenceByIdentifier(this);
}
connectionEstablishWait.Set();
if (NetworkComms.LoggingEnabled)
{
NetworkComms.Logger.Trace(" ... connection successfully established with " + ConnectionInfo);
}
}
}
catch (SocketException e)
{
//If anything goes wrong we close the connection.
CloseConnection(true, 43);
throw new ConnectionSetupException(e.ToString());
}
catch (Exception ex)
{
//If anything goes wrong we close the connection.
CloseConnection(true, 44);
//For some odd reason not all SocketExceptions get caught above, so another check here
if (ex.GetBaseException().GetType() == typeof(SocketException))
{
throw new ConnectionSetupException(ex.ToString());
}
else
{
throw;
}
}
}
