/// <summary>
/// Called when the DNS resolved a host.
/// </summary>
/// <param name="ar">The asynchronous result object for the asynchronous method.</param>
private void OnDnsGetHostEntry(IAsyncResult ar)
{
try
{
IPHostEntry entry = Dns.EndGetHostEntry(ar);
DNSResolveState state = (DNSResolveState)ar.AsyncState;
base.BeginConnect(new IPEndPoint(entry.AddressList[0], state.Port), OnSocketBeginConnect, state.State);
}
catch (Exception exception)
{
throw new TorException("The fowarding socket failed to resolve a hostname", exception);
}
}
/// <summary>
/// Begins an asynchronous request to resolve the DNS information for a host.
/// </summary>
/// <param name="host">The host address to resolve.</param>
/// <param name="port">The port number of the associated host.</param>
/// <returns>An <see cref="T:System.IAsyncResult" /> that references the asynchronous request.</returns>
private IAsyncResult BeginDNSResolve(string host, int port, AsyncCallback callback, object state)
{
DNSResolveState dnsState;
try
{
dnsState = new DNSResolveState();
dnsState.Callback = callback;
dnsState.Host = host;
dnsState.Port = port;
dnsState.State = state;
asyncResult = new Socks5AsyncResult();
Dns.BeginGetHostEntry(host, OnDnsGetHostEntry, dnsState);
return(asyncResult);
}
catch (Exception exception)
{
throw new TorException("The forwarding socket failed to resolve a host address", exception);
}
}
