/// <summary>
/// Establishes a connection to the specified remote host.
/// </summary>
/// <returns>True if we connected, false if we didn't</returns>
public void Connect()
{
_dest = Address.Resolve(_hostname, _port);
if (_dest == null)
return;
Logger.InfoFormat(this, "Connecting to: {0} on port {1}", _dest.IP.ToString(), _port.ToString());
if (!_dest.IPV6)
{
Logger.Debug(this, "Connecting using IPv4");
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
}
else
{
Logger.Debug(this, "Connecting using IPv6");
_socket = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);
}
try
{
//_socket.Connect(_dest.EndPoint);
_socket.BeginConnect(_dest.EndPoint, new AsyncCallback(FinishConnect), null);
if(_resetEvent.WaitOne(_timeout, false))
{
if (_connected)
{
_netstream = new NetworkStream(_socket, true);
_stream = _netstream;
_stream.BeginRead(_buff, 0, _buff.Length, new AsyncCallback(Receive), null);
_states.State = new ConnectedState();
_states.Execute(null);
}
}
else
{
Errors.Instance.SendError(this, ErrorType.ConnectionTimeout, "Timed out while connecting to server.");
}
}
catch (SocketException)
{
//We Failed to connect
//TODO: Return an error using the Errors class so that the hosting application can take action.
}
}
private static Address ResolveDNS(string hostname, int port)
{
Address temp;
temp = new Address(hostname, port);
Logger.Debug(typeof(Address), "Getting DNS addresses");
NetworkInterface[] net = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface n in net)
{
if (n.OperationalStatus == OperationalStatus.Up && n.NetworkInterfaceType != NetworkInterfaceType.Loopback)
{
IPInterfaceProperties i = n.GetIPProperties();
foreach (IPAddress dns in i.DnsAddresses)
{
if (dns.AddressFamily == AddressFamily.InterNetwork)
{
_dns.Add(dns);
Logger.DebugFormat(typeof(Address), "Dns Address: {0}", dns.ToString());
}
}
}
}
try
{
string lookup;
SRVRecord[] srv = Resolver.SRVLookup("_xmpp-client._tcp." + hostname, _dns[0]);
if (srv.Length > 0)
{
Logger.DebugFormat(typeof(Address), "SRV Address: {0}", srv[0].Target);
lookup = srv[0].Target;
_port = srv[0].Port;
}
else
lookup = hostname;
Request req = new Request();
req.AddQuestion(new Question(lookup, DnsType.ANAME, DnsClass.IN));
Response resp = Resolver.Lookup(req, _dns[0]);
if (resp.Answers.Length > 0 && resp != null)
{
foreach (Answer ans in resp.Answers)
{
if (ans.Type == DnsType.ANAME)
{
ANameRecord rec = (ANameRecord)ans.Record;
temp.IP = rec.IPAddress;
}
else
{
Logger.Debug(typeof(Address), "DNS Type: " + ans.Type.ToString());
}
}
}
else
{
Logger.Error(typeof(Address), "Error resolving DNS address.");
return null;
}
temp._end = new IPEndPoint(temp.IP, _port);
}
catch (Exception e)
{
Logger.ErrorFormat(typeof(Address), "Error resolving DNS address: {0}", e);
return null;
}
return temp;
}
private static Address ResolveSystem(string hostname, int port)
{
Address temp;
temp = new Address(hostname, port);
try {
IPAddress addr = Dns.GetHostEntry(hostname).AddressList[0];
temp._ip = addr;
temp._end = new IPEndPoint(addr, _port);
} catch (Exception e) {
Logger.ErrorFormat(typeof(Address), "Error resolving address: {0}", e);
return null;
}
return temp;
}
public AsyncSocket()
{
_dest = new Address();
}