private static void SocketConnectCompleted(object sender, SocketAsyncEventArgs e)
{
DnsConnectState dnsConnectState = e.UserToken as DnsConnectState;
if (e.SocketError == SocketError.Success)
{
ClearSocketAsyncEventArgs(e);
dnsConnectState.Callback((Socket)sender, dnsConnectState.State, e, null);
return;
}
if (e.SocketError != SocketError.HostUnreachable && e.SocketError != SocketError.ConnectionRefused)
{
ClearSocketAsyncEventArgs(e);
dnsConnectState.Callback(null, dnsConnectState.State, e, null);
return;
}
Socket attempSocket;
IPAddress nextAddress = GetNextAddress(dnsConnectState, out attempSocket);
if (nextAddress == null)
{
ClearSocketAsyncEventArgs(e);
e.SocketError = SocketError.HostUnreachable;
dnsConnectState.Callback(null, dnsConnectState.State, e, null);
return;
}
e.RemoteEndPoint = new IPEndPoint(nextAddress, dnsConnectState.Port);
if (!attempSocket.ConnectAsync(e))
{
SocketConnectCompleted(attempSocket, e);
}
}
private static void OnGetHostAddresses(IAsyncResult result)
{
DnsConnectState dnsConnectState = result.AsyncState as DnsConnectState;
IPAddress[] array;
try
{
array = Dns.EndGetHostAddresses(result);
}
catch (Exception exception)
{
dnsConnectState.Callback(null, dnsConnectState.State, null, exception);
return;
}
if (array == null || array.Length == 0)
{
dnsConnectState.Callback(null, dnsConnectState.State, null, new SocketException(11001));
return;
}
dnsConnectState.Addresses = array;
CreateAttempSocket(dnsConnectState);
Socket attempSocket;
IPAddress nextAddress = GetNextAddress(dnsConnectState, out attempSocket);
if (nextAddress == null)
{
dnsConnectState.Callback(null, dnsConnectState.State, null, new SocketException(10047));
return;
}
if (dnsConnectState.LocalEndPoint != null)
{
try
{
attempSocket.ExclusiveAddressUse = false;
attempSocket.Bind(dnsConnectState.LocalEndPoint);
}
catch (Exception exception2)
{
dnsConnectState.Callback(null, dnsConnectState.State, null, exception2);
return;
}
}
SocketAsyncEventArgs socketAsyncEventArgs = new SocketAsyncEventArgs();
socketAsyncEventArgs.Completed += SocketConnectCompleted;
IPEndPoint iPEndPoint = (IPEndPoint)(socketAsyncEventArgs.RemoteEndPoint = new IPEndPoint(nextAddress, dnsConnectState.Port));
socketAsyncEventArgs.UserToken = dnsConnectState;
if (!attempSocket.ConnectAsync(socketAsyncEventArgs))
{
SocketConnectCompleted(attempSocket, socketAsyncEventArgs);
}
}
