/// <summary>
/// Clears and reconstructs the list of adapters,
/// based on the current hardware connections to the
/// device.
/// </summary>
unsafe void Refresh()
{
// Clear the existing list, if any.
this.Clear();
// Get the list of adapters, in the form of an
// IP_ADAPTER_INFO object.
IP_ADAPTER_INFO ipinfo = new IP_ADAPTER_INFO();
// For each adapter index, get the adapter
// information. This is done in the fixed
// context, as the base address is saved when
// you do this.
Adapter adap = ipinfo.FirstAdapter();
while ( adap != null )
{
// Add the new item to our list.
this.List.Add( adap );
// Get the next adapter information.
adap = ipinfo.NextAdapter();
}
}
internal Adapter( IP_ADAPTER_INFO info ) : base(DEVICE_NAME)
{
this.FromIP_ADAPTER_INFO( info );
}
public Adapter NextAdapter()
{
// Starting at the current offset in our 'data'
// member, get the Next field, subtrace its pointer
// from the initial pointer value to find the
// new offset, and create an adapter starting
// at that point in the 'data' member.
if ( data == null )
return null;
// Handle no more case.
if ( firstnextOffset == 0 )
return null;
IP_ADAPTER_INFO newinfo = new IP_ADAPTER_INFO( data,
firstnextOffset );
firstnextIndex++;
// Now, use the Next field of the new info
// structure to update where we find the next
// one after that in our list.
if ( newinfo.Next == 0 )
firstnextOffset = 0;
else
firstnextOffset = newinfo.Next - ourBase;
return new Adapter( newinfo );
}
internal void FromIP_ADAPTER_INFO( IP_ADAPTER_INFO info )
{
// Copy the name, description, index, etc.
name = info.AdapterName;
description = info.Description;
index = info.Index;
// The adapter type should not change, so we
// can store that.
type = info.Type;
// The hardware address should not change, so
// we can store that, too.
hwaddress = info.PhysAddress;
// Get the flag concerning whether DHCP is enabled
// or not.
dhcpenabled = info.DHCPEnabled;
// Get the current IP address and subnet mask.
currentIp = info.CurrentIpAddress;
currentsubnet = info.CurrentSubnetMask;
// Get the gateway address and the DHCP server.
gateway = info.Gateway;
dhcpserver = info.DHCPServer;
// Get the WINS information.
havewins = info.HaveWINS;
primarywinsserver = info.PrimaryWINSServer;
secondarywinsserver = info.SecondaryWINSServer;
// DHCP lease information.
leaseobtained = info.LeaseObtained;
leaseexpires = info.LeaseExpires;
}