//发送ARP广播，返回192.168局域网中其他计算机的ARP相应数据包
public static ArrayList ARPBroadcast(LivePcapDevice device)
{
ArrayList tmpArrayList = new ArrayList();
PhysicalAddress localMAC = device.Interface.MacAddress;
//这是我们伪造的一个IP
IPAddress srcIP = IPAddress.Parse("192.168.3.3");
String arpFilter = "arp and ether dst " + localMAC.ToString();
//open the device with 20ms timeout
device.Open(DeviceMode.Normal, 20);
device.Filter = arpFilter;
IPAddress destIP;
SharpPcap.ARP tmpArp=new ARP();
//发送65535个数据包耗时30秒，这30秒内到达的数据包由网卡缓存
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 256; j++)
{
destIP = IPAddress.Parse("192.168." + i.ToString() + "." + j.ToString());
//request是Packet类型
var request = tmpArp.BuildRequest(destIP, localMAC, srcIP);
//发送数据包到网络中
device.SendPacket(request);
}
}
DateTime StartTime = DateTime.Now;
DateTime endTime = StartTime.AddSeconds(5);
PacketDotNet.ARPPacket arpPacket = null;
//接收5秒钟数据包，然后闪人
while (DateTime.Now <= endTime)
{
var reply = device.GetNextPacket();
if (reply == null)
continue;
var packet = PacketDotNet.Packet.ParsePacket(reply);
arpPacket = PacketDotNet.ARPPacket.GetEncapsulated(packet);
if (arpPacket == null)
{
continue;
}
else
{
//exists判断是否ARP回应包存在重复
bool exists = false;
foreach (Object obj in tmpArrayList)
{
ARPPacket tmp=(ARPPacket)obj;
if (arpPacket.SenderHardwareAddress==tmp.SenderHardwareAddress)
{
exists = true;
break;
}
}
if (exists == false)
{
tmpArrayList.Add(arpPacket);
}
}
}
device.Close();
return tmpArrayList;
}
public static void Main(string[] args)
{
// Print SharpPcap version
string ver = SharpPcap.Version.VersionString;
Console.WriteLine("SharpPcap {0}, Example2.ArpResolve.cs\n", ver);
// Retrieve the device list
var devices = LibPcapLiveDeviceList.Instance;
// If no devices were found print an error
if(devices.Count < 1)
{
Console.WriteLine("No devices were found on this machine");
return;
}
Console.WriteLine("The following devices are available on this machine:");
Console.WriteLine("----------------------------------------------------");
Console.WriteLine();
int i = 0;
// Print out the available devices
foreach(var dev in devices)
{
Console.WriteLine("{0}) {1} {2}", i, dev.Name, dev.Description);
i++;
}
Console.WriteLine();
Console.Write("-- Please choose a device for sending the ARP request: ");
i = int.Parse( Console.ReadLine() );
var device = devices[i];
System.Net.IPAddress ip;
// loop until a valid ip address is parsed
while(true)
{
Console.Write("-- Please enter IP address to be resolved by ARP: ");
if(System.Net.IPAddress.TryParse(Console.ReadLine(), out ip))
break;
Console.WriteLine("Bad IP address format, please try again");
}
// Create a new ARP resolver
ARP arper = new ARP(device);
// print the resolved address or indicate that none was found
var resolvedMacAddress = arper.Resolve(ip);
if(resolvedMacAddress == null)
{
Console.WriteLine("Timeout, no mac address found for ip of " + ip);
} else
{
Console.WriteLine(ip + " is at: " + arper.Resolve(ip));
}
}
