internal AirPcapKey(AirPcapUnmanagedStructures.AirpcapKey key)
{
Type = key.KeyType;
Data = new byte[key.KeyData.Length];
Array.Copy(key.KeyData, Data, Data.Length);
}
/// <summary>
/// Convert an array of keys into unmanaged memory
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
private static IntPtr KeysToIntPtr(List <AirPcapKey> value)
{
// allocate memory for the entire collection
IntPtr pKeyCollection = Marshal.AllocHGlobal(AirPcapDevice.KeyCollectionSize(value.Count));
var pKeyCollectionPosition = pKeyCollection;
// build the collection struct
var collection = new AirPcapUnmanagedStructures.AirpcapKeysCollection();
collection.nKeys = (uint)value.Count;
// convert this collection to unmanaged memory
Marshal.StructureToPtr(collection, pKeyCollectionPosition, false);
// advance the pointer
pKeyCollectionPosition = new IntPtr(pKeyCollectionPosition.ToInt64() +
Marshal.SizeOf(typeof(AirPcapUnmanagedStructures.AirpcapKeysCollection)));
// write the keys to memory
for (int x = 0; x < value.Count; x++)
{
var key = new AirPcapUnmanagedStructures.AirpcapKey();
key.KeyType = value[x].Type;
key.KeyLen = (uint)value[x].Data.Length;
// make sure we have the right size byte[], the fields in the structure passed to Marshal.StructureToPtr()
// have to match the specified sizes or an exception will be thrown
key.KeyData = new byte[AirPcapUnmanagedStructures.WepKeyMaxSize];
Array.Copy(value[x].Data, key.KeyData, value[x].Data.Length);
// copy the managed memory into the unmanaged memory
Marshal.StructureToPtr(key, pKeyCollectionPosition, false);
// advance the pointer
pKeyCollectionPosition = new IntPtr(pKeyCollectionPosition.ToInt64() + Marshal.SizeOf(typeof(AirPcapUnmanagedStructures.AirpcapKey)));
}
return(pKeyCollection);
}
