private void GetPerAdapterInfo(uint index)
{
if (index != 0)
{
uint size = 0;
uint result = Interop.IpHlpApi.GetPerAdapterInfo(index, IntPtr.Zero, ref size);
while (result == Interop.IpHlpApi.ERROR_BUFFER_OVERFLOW)
{
// Now we allocate the buffer and read the network parameters.
IntPtr buffer = Marshal.AllocHGlobal((int)size);
try
{
result = Interop.IpHlpApi.GetPerAdapterInfo(index, buffer, ref size);
if (result == Interop.IpHlpApi.ERROR_SUCCESS)
{
Interop.IpHlpApi.IpPerAdapterInfo ipPerAdapterInfo =
Marshal.PtrToStructure <Interop.IpHlpApi.IpPerAdapterInfo>(buffer);
_autoConfigEnabled = ipPerAdapterInfo.autoconfigEnabled;
_autoConfigActive = ipPerAdapterInfo.autoconfigActive;
}
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
if (result != Interop.IpHlpApi.ERROR_SUCCESS)
{
throw new NetworkInformationException((int)result);
}
}
}
private void GetPerAdapterInfo(uint index)
{
if (index != 0)
{
uint size = 0;
SafeLocalAllocHandle buffer = null;
uint result = Interop.IpHlpApi.GetPerAdapterInfo(index, SafeLocalAllocHandle.Zero, ref size);
while (result == Interop.IpHlpApi.ERROR_BUFFER_OVERFLOW)
{
// Now we allocate the buffer and read the network parameters.
using (buffer = SafeLocalAllocHandle.LocalAlloc((int)size))
{
result = Interop.IpHlpApi.GetPerAdapterInfo(index, buffer, ref size);
if (result == Interop.IpHlpApi.ERROR_SUCCESS)
{
Interop.IpHlpApi.IpPerAdapterInfo ipPerAdapterInfo =
Marshal.PtrToStructure <Interop.IpHlpApi.IpPerAdapterInfo>(buffer.DangerousGetHandle());
_autoConfigEnabled = ipPerAdapterInfo.autoconfigEnabled;
_autoConfigActive = ipPerAdapterInfo.autoconfigActive;
}
}
}
if (result != Interop.IpHlpApi.ERROR_SUCCESS)
{
throw new NetworkInformationException((int)result);
}
}
}