Using SharpPcap and Packet.Net to Send ARP Packets Personally

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Question:

I have been attempting to send a
ARP packet
using SharpPcap and Packet.Net, but have been unsuccessful thus far. Despite using

device.SendPacket

to transmit the packet, it does not appear to be successfully sent and I am unsure of the reason for this issue.

This is my code:

ARPPacket arpPacket = new ARPPacket(ARPOperation.Request, PhysicalAddress.Parse("000000000000"), targetIpAddress, device.Interface.MacAddress, myIpAddress);
EthernetPacket ethPacket = new EthernetPacket(device.Interface.MacAddress, PhysicalAddress.Parse("FFFFFFFFFFFF"), EthernetPacketType.Arp);
ethPacket.PayloadPacket = arpPacket;
device.Open();
device.SendPacket(ethPacket);
device.Close();

It is crucial to send my ARP packets instead of solely relying on the SharpPcap ARP class.


Solution 1:

public static void ARP(IPAddress ipAddress , LivePcapDevice device)
{
if (ipAddress == null )
throw new Exception("ARP IP address Cannot be null");
var ethernetPacket = new PacketDotNet.EthernetPacket(device.Addresses[1].Addr.hardwareAddress, PhysicalAddress.Parse("FF-FF-FF-FF-FF-FF"), PacketDotNet.EthernetPacketType.Arp);
var arpPacket = new PacketDotNet.ARPPacket(PacketDotNet.ARPOperation.Request, PhysicalAddress.Parse("00-00-00-00-00-00"), ipAddress , device.Addresses[1].Addr.hardwareAddress, device.Addresses[0].Addr.ipAddress );
ethernetPacket.PayloadPacket = arpPacket;
device.SendPacket(ethernetPacket);
}

Give this function a shot, which can be found at http://stolenpackets.net/?p=29.


Solution 2:


Upon inspecting the code, it appears that there is no usage of EthernetPacket.

ARPPacket arpPacket = new ARPPacket(ARPOperation.Request, PhysicalAddress.Parse("000000000000"), targetIpAddress, device.Interface.MacAddress, myIpAddress);
arpPacket.ARPTargetProtoAddress = destIP;
arpPacket.DestinationHwAddress = PhysicalAddress.Parse("FF-FF-FF-FF-FF-FF");
device.Open();
device.SendPacket(arpPacket);
device.Close();

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