internal static unsafe partial int GetAddrInfoExW(
string pName,
string?pServiceName,
int dwNamespace,
IntPtr lpNspId,
AddressInfoEx *pHints,
AddressInfoEx **ppResult,
IntPtr timeout,
NativeOverlapped *lpOverlapped,
internal static extern unsafe int GetAddrInfoExW(
[In] string pName,
[In] string?pServiceName,
[In] int dwNamespace,
[In] IntPtr lpNspId,
[In] AddressInfoEx *pHints,
[Out] AddressInfoEx **ppResult,
[In] IntPtr timeout,
[In] NativeOverlapped *lpOverlapped,
[In] delegate *unmanaged <int, int, NativeOverlapped *, void> lpCompletionRoutine,
internal static extern unsafe int GetAddrInfoExW(
[In] string pName,
[In] string pServiceName,
[In] int dwNamespace,
[In] IntPtr lpNspId,
[In] AddressInfoEx *pHints,
[Out] AddressInfoEx **ppResult,
[In] IntPtr timeout,
[In] NativeOverlapped *lpOverlapped,
[In] LPLOOKUPSERVICE_COMPLETION_ROUTINE lpCompletionRoutine,
[Out] IntPtr *lpNameHandle);
internal static extern unsafe void FreeAddrInfoExW(AddressInfoEx *pAddrInfo);
private static unsafe void ProcessResult(SocketError errorCode, GetAddrInfoExContext *context)
{
try
{
GetAddrInfoExState state = GetAddrInfoExState.FromHandleAndFree(context->QueryStateHandle);
if (errorCode != SocketError.Success)
{
state.CompleteAsyncResult(new SocketException((int)errorCode));
return;
}
AddressInfoEx *result = context->Result;
string canonicalName = null;
List <IPAddress> addresses = new List <IPAddress>();
while (result != null)
{
if (canonicalName == null && result->ai_canonname != IntPtr.Zero)
{
canonicalName = Marshal.PtrToStringUni(result->ai_canonname);
}
var socketAddress = new ReadOnlySpan <byte>(result->ai_addr, result->ai_addrlen);
if (result->ai_family == AddressFamily.InterNetwork)
{
if (socketAddress.Length == SocketAddressPal.IPv4AddressSize)
{
addresses.Add(CreateIPv4Address(socketAddress));
}
}
else if (SocketProtocolSupportPal.OSSupportsIPv6 && result->ai_family == AddressFamily.InterNetworkV6)
{
if (socketAddress.Length == SocketAddressPal.IPv6AddressSize)
{
addresses.Add(CreateIPv6Address(socketAddress));
}
}
result = result->ai_next;
}
if (canonicalName == null)
{
canonicalName = state.HostName;
}
state.CompleteAsyncResult(new IPHostEntry
{
HostName = canonicalName,
Aliases = Array.Empty <string>(),
AddressList = addresses.ToArray()
});
}
finally
{
GetAddrInfoExContext.FreeContext(context);
}
}
internal static unsafe partial void FreeAddrInfoExW(AddressInfoEx *pAddrInfo);
