public bool StopSniffing()
{
try
{
aborting = true;
if (sniffingThread != null)
{
sniffingThread.Join();
}
if (device != null && device.Opened)
{
device.Close();
}
if (decodingThread != null)
{
decodingThread.Join();
}
aborting = false;
}
catch (Exception e)
{
Log(e.ToString());
return(false);
}
Log("Sniffing stopped");
return(true);
}
private void 停止ToolStripMenuItem_Click(object sender, EventArgs e)
{
device.DumpFlush();
device.DumpClose();
device.StopCapture();
device.Close();
this.lblStatus.Text = "捕获已经停止";
this.开始ToolStripMenuItem.Enabled = true;
this.停止ToolStripMenuItem.Enabled = false;
}
/// <summary>
/// pcap close
/// </summary>
private void PcapClose()
{
// キャプチャ停止中にキャプチャが走るのを防ぐため
device.OnPacketArrival -= OnPacketArrival;
//await Task.Run(async () => {
// await Task.Delay(500);
// device.StopCapture();
// device.Close();
//});
//await Task.Delay(500);
// キャプチャ停止
System.Threading.Thread.Sleep(200);
device.StopCapture();
device.Close();
}
private void btnStop_Click(object sender, EventArgs e)
{
device.StopCapture();
device.Close();
}
private void StartFilter()
{
m_Device = null;
while (!m_bStop)
{
try
{
LivePcapDeviceList devices = null;
devices = LivePcapDeviceList.Instance;
int i = 0;
/* Scan the list printing every entry */
foreach (LivePcapDevice dev in devices)
{
if (dev.Description.ToString() == m_strNIC)
{
m_Device = devices[i];
break;
}
else
{
i++;
}
}
if (m_Device == null)
{
m_IStatusUpdate.UpdateStatus("Failed to get handle to NIC");
}
else
{
//Open the device for capturing
int readTimeoutMilliseconds = 1000;
m_Device.Open(DeviceMode.Promiscuous, readTimeoutMilliseconds);
//Register our handler function to the 'packet arrival' event
m_Device.OnPacketArrival += new PacketArrivalEventHandler(device_OnPacketArrival);
// udpdump filter to capture only UDP/IP packets
string filter = "udp";
m_Device.SetFilter(filter);
if (m_dtBound != DateTime.MaxValue)
{
m_IStatusUpdate.UpdateStatus("Next update at " + (m_dtBound + m_spanLease).ToString());
}
else
{
m_IStatusUpdate.UpdateStatus("Started DHCP Client...");
}
// Start capture packets
m_Device.Capture();
// NO stop request...
if (!m_bStop)
{
if (m_Device != null)
{
m_Device.Close();
m_Device = null;
}
}
}
}
catch (Exception exc)
{
m_IStatusUpdate.UpdateStatus("Exception: " + exc.Message);
try
{
m_Device.Close();
}
catch (Exception)
{ }
m_Device = null;
}
Thread.Sleep(1000);
}
}
//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;
}
//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);
}
