public static unsafe void GetAddrInfoAsync(DnsResolveAsyncResult asyncResult)
{
GetAddrInfoExContext *context = GetAddrInfoExContext.AllocateContext();
try
{
var state = new GetAddrInfoExState(asyncResult);
context->QueryStateHandle = state.CreateHandle();
}
catch
{
GetAddrInfoExContext.FreeContext(context);
throw;
}
AddressInfoEx hints = new AddressInfoEx();
hints.ai_flags = AddressInfoHints.AI_CANONNAME;
hints.ai_family = AddressFamily.Unspecified; // Gets all address families
SocketError errorCode =
(SocketError)Interop.Winsock.GetAddrInfoExW(asyncResult.HostName, null, 0 /* NS_ALL*/, IntPtr.Zero, ref hints, out context->Result, IntPtr.Zero, ref context->Overlapped, s_getAddrInfoExCallback, out context->CancelHandle);
if (errorCode != SocketError.IOPending)
{
ProcessResult(errorCode, context);
}
}
internal static extern unsafe int GetAddrInfoExW(
[In] string pName,
[In] string pServiceName,
[In] int dwNamespace,
[In] IntPtr lpNspId,
[In] ref AddressInfoEx pHints,
[Out] out AddressInfoEx *ppResult,
[In] IntPtr timeout,
[In] ref NativeOverlapped lpOverlapped,
[In] LPLOOKUPSERVICE_COMPLETION_ROUTINE lpCompletionRoutine,
[Out] out IntPtr lpNameHandle
);
