static private IReadOnlyList <PcapInterface> GetAllPcapInterfaces(IntPtr devicePtr, ICredentials credentials)
{
var list = new List <PcapInterface>();
var nics = NetworkInterface.GetAllNetworkInterfaces();
var nextDevPtr = devicePtr;
while (nextDevPtr != IntPtr.Zero)
{
// Marshal pointer into a struct
var pcap_if_unmanaged = new pcap_if_wrapper()
{
native = Marshal.PtrToStructure <pcap_if>(nextDevPtr)
};
NetworkInterface networkInterface = null;
foreach (var nic in nics)
{
// if the name and id match then we have found the NetworkInterface
// that matches the PcapDevice
if (pcap_if_unmanaged.GetNameString().EndsWith(nic.Id))
{
networkInterface = nic;
}
}
var pcap_if = new PcapInterface(pcap_if_unmanaged, networkInterface, credentials);
list.Add(pcap_if);
nextDevPtr = pcap_if_unmanaged.native.Next;
}
return(list);
}
internal PcapInterface(pcap_if_wrapper pcapIf, NetworkInterface networkInterface, ICredentials credentials)
{
Name = pcapIf.GetNameString();
Description = pcapIf.GetDescriptionString();
Flags = pcapIf.native.Flags;
Addresses = new List <PcapAddress>();
GatewayAddresses = new List <IPAddress>();
Credentials = credentials;
// attempt to populate the mac address,
// friendly name etc of this device
if (networkInterface != null)
{
var ipProperties = networkInterface.GetIPProperties();
int gatewayAddressCount = ipProperties.GatewayAddresses.Count;
if (gatewayAddressCount != 0)
{
foreach (GatewayIPAddressInformation gatewayInfo in ipProperties.GatewayAddresses)
{
GatewayAddresses.Add(gatewayInfo.Address);
}
}
FriendlyName = networkInterface.Name;
}
// retrieve addresses
var address = pcapIf.native.Addresses;
while (address != IntPtr.Zero)
{
// Marshal memory pointer into a sockaddr struct
var addr = Marshal.PtrToStructure <pcap_addr>(address);
PcapAddress newAddress = new PcapAddress(addr);
Addresses.Add(newAddress);
// is this a hardware address?
// if so we should set our MacAddress
if (newAddress.Addr?.type == Sockaddr.AddressTypes.HARDWARE)
{
if (MacAddress == null)
{
MacAddress = newAddress.Addr.hardwareAddress;
}
else if (!MacAddress.Equals(newAddress.Addr.hardwareAddress))
{
throw new InvalidOperationException("found multiple hardware addresses, existing addr "
+ MacAddress.ToString() + ", new address " + newAddress.Addr.hardwareAddress.ToString());
}
}
address = addr.Next; // move to the next address
}
}
