/// <summary>
/// Remove the socket contained in the given state object
/// from the connected array list and hash table, then close the
/// socket
/// </summary>
virtual protected void CloseSocket(HttpSocket state)
{
HttpSocket actual_state;
lock (ConnectedSockets)
{
if (!ConnectedSockets.TryGetValue(state.id, out actual_state))
{
return;
}
System.Diagnostics.Debug.Assert(actual_state == state);
ConnectedSockets.Remove(state.id);
}
state.CloseSocket();
}
/// <summary>
/// If necessary, connect the remote <c>SocketPS</c> socket
/// to the given host and port
/// </summary>
/// <param name="hostname">Remote host name</param>
/// <param name="port">Remote port</param>
/// <remarks>
/// If SocketPS is already connected to the right host and port,
/// the socket is reused as is.
/// </remarks>
protected void Connect(string hostname, int port)
{
System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(hostname));
System.Diagnostics.Debug.Assert(port > 0);
if (DestinationHostName != null &&
DestinationHostName.Equals(hostname) &&
DestinationPort == port &&
(SocketPS != null && !SocketPS.IsSocketDead()))
{
// Nothing to do, just reuse the socket
return;
}
if (SocketPS != null)
{
//log.Debug("Changing hostname/port from " +
// DestinationHostName + ":" + DestinationPort +
// " to " + hostname + ":" + port);
// We have a socket connected to the wrong host (or port)
SocketPS.CloseSocket();
SocketPS = null;
}
IPAddress[] ips = Resolve(hostname);
Socket socket = null;
Exception e = null;
foreach (var ip in ips)
{
try
{
socket = new Socket(ip.AddressFamily, SocketType.Stream,
ProtocolType.Tcp);
socket.Connect(ip, port);
break;
}
catch (Exception ee)
{
if (ip.Equals(IPAddress.IPv6Loopback))
{
// Do not log that
continue;
}
if (e == null)
{
e = ee;
}
if (socket != null)
{
socket.Close();
socket = null;
}
//log.Error(ee);
}
}
if (socket == null)
{
throw e;
}
// Checked up, and good to go
SocketPS = new HttpSocket(socket);
DestinationHostName = hostname;
DestinationPort = port;
//log.Debug("SocketPS connected to " + hostname + ":" + port);
}