/// <summary>
/// Resolves the MAC address of the specified IP address
/// </summary>
/// <param name="destIP">The IP address to resolve</param>
/// <param name="deviceName">The local network device name on which to send the ARP request</param>
/// <returns>The MAC address that matches to the given IP address</returns>
public PhysicalAddress Resolve(System.Net.IPAddress destIP, string deviceName)
{
PhysicalAddress localMAC = LocalMAC;
System.Net.IPAddress localIP = LocalIP;
//NetworkDevice device = new NetworkDevice(DeviceName);
PcapDevice device = Pcap.GetPcapDevice(DeviceName);
//FIXME: PcapDevices don't have IpAddress
// These were present under Windows specific network adapters
// and may be present in pcap in the future with pcap-ng
// if no local ip address is specified use the one from the
// local device
#if false
if (localIP == null)
{
localIP = device.IpAddress;
}
#endif
// if no local mac address is specified use the one from the device
if (LocalMAC == null)
{
localMAC = device.Interface.MacAddress;
}
//Build a new ARP request packet
ARPPacket request = BuildRequest(destIP, localMAC, localIP);
//create a "tcpdump" filter for allowing only arp replies to be read
String arpFilter = "arp and ether dst " + localMAC.ToString();
//open the device with 20ms timeout
device.Open(true, 20);
//set the filter
device.SetFilter(arpFilter);
//inject the packet to the wire
device.SendPacket(request);
ARPPacket reply;
while (true)
{
//read the next packet from the network
reply = (ARPPacket)device.GetNextPacket();
if (reply == null)
{
continue;
}
//if this is the reply we're looking for, stop
if (reply.ARPSenderProtoAddress.Equals(destIP))
{
break;
}
}
//free the device
device.Close();
//return the resolved MAC address
return(reply.ARPSenderHwAddress);
}
/// <summary>
/// Resolves the MAC address of the specified IP address
/// </summary>
/// <param name="destIP">The IP address to resolve</param>
/// <param name="deviceName">The local network device name on which to send the ARP request</param>
/// <returns>The MAC address that matches to the given IP address</returns>
public PhysicalAddress Resolve(System.Net.IPAddress destIP, string deviceName)
{
PhysicalAddress localMAC = LocalMAC;
System.Net.IPAddress localIP = LocalIP;
//NetworkDevice device = new NetworkDevice(DeviceName);
PcapDevice device = Pcap.GetPcapDevice(DeviceName);
//FIXME: PcapDevices don't have IpAddress
// These were present under Windows specific network adapters
// and may be present in pcap in the future with pcap-ng
// if no local ip address is specified use the one from the
// local device
#if false
if (localIP == null)
{
localIP = device.IpAddress;
}
#endif
// if no local mac address is specified use the one from the device
if (LocalMAC == null)
{
localMAC = device.Interface.MacAddress;
}
//Build a new ARP request packet
ARPPacket request = BuildRequest(destIP, localMAC, localIP);
//create a "tcpdump" filter for allowing only arp replies to be read
//String arpFilter = "arp and ether dst 00:1E:33:A6:FA:52";
String arpFilter = "arp and ether dst ";
byte[] mac = localMAC.GetAddressBytes();
for (int i = 0; i < mac.Length; i++)
{
// Display the physical address in hexadecimal.
arpFilter += mac[i].ToString("X2");
// Insert a hyphen after each byte, unless we are at the end of the
// address.
if (i != mac.Length - 1)
{
arpFilter += ":";
}
}
// arpFilter += mac;
//open the device with 20ms timeout
device.Open(true, 20);
//set the filter
device.SetFilter(arpFilter);
//inject the packet to the wire
device.SendPacket(request);
ARPPacket reply;
while (true)
{
//read the next packet from the network
reply = (ARPPacket)device.GetNextPacket();
if (reply == null)
{
continue;
}
//if this is the reply we're looking for, stop
if (reply.ARPSenderProtoAddress.Equals(destIP))
{
break;
}
}
//free the device
device.Close();
//return the resolved MAC address
return(reply.ARPSenderHwAddress);
}
