/// <summary>
/// Retrieve a list of the current PcapDevices
/// </summary>
/// <returns>
/// A <see cref="List<LibPcapLiveDevice>"/>
/// </returns>
private static List <LibPcapLiveDevice> GetDevices()
{
var deviceList = new List <LibPcapLiveDevice>();
var devicePtr = IntPtr.Zero;
var errorBuffer = new StringBuilder(Pcap.PCAP_ERRBUF_SIZE);
int result = LibPcapSafeNativeMethods.pcap_findalldevs(ref devicePtr, errorBuffer);
if (result < 0)
{
throw new PcapException(errorBuffer.ToString());
}
IntPtr nextDevPtr = devicePtr;
while (nextDevPtr != IntPtr.Zero)
{
// Marshal pointer into a struct
PcapUnmanagedStructures.pcap_if pcap_if_unmanaged =
(PcapUnmanagedStructures.pcap_if)Marshal.PtrToStructure(nextDevPtr,
typeof(PcapUnmanagedStructures.pcap_if));
PcapInterface pcap_if = new PcapInterface(pcap_if_unmanaged);
deviceList.Add(new LibPcapLiveDevice(pcap_if));
nextDevPtr = pcap_if_unmanaged.Next;
}
LibPcapSafeNativeMethods.pcap_freealldevs(devicePtr); // Free unmanaged memory allocation.
return(deviceList);
}
internal PcapInterface(PcapUnmanagedStructures.pcap_if pcapIf)
{
Name = pcapIf.Name;
Description = pcapIf.Description;
Flags = pcapIf.Flags;
// retrieve addresses
Addresses = new List <PcapAddress>();
IntPtr address = pcapIf.Addresses;
while (address != IntPtr.Zero)
{
//A sockaddr struct
PcapUnmanagedStructures.pcap_addr addr;
//Marshal memory pointer into a struct
addr = (PcapUnmanagedStructures.pcap_addr)Marshal.PtrToStructure(address,
typeof(PcapUnmanagedStructures.pcap_addr));
PcapAddress newAddress = new PcapAddress(addr);
Addresses.Add(newAddress);
// is this a hardware address?
// if so we should set our internal m_macAddress member variable
if ((newAddress.Addr != null) &&
(newAddress.Addr.type == Sockaddr.AddressTypes.HARDWARE))
{
if (m_macAddress == null)
{
m_macAddress = newAddress;
}
else
{
throw new System.InvalidOperationException("found multiple hardware addresses, existing addr "
+ MacAddress.ToString() + ", new address " + newAddress.Addr.hardwareAddress.ToString());
}
}
address = addr.Next; // move to the next address
}
}