/// <summary>
/// 接收到数据包
/// </summary>
/// <param name="ar">异步操作状态接口参数</param>
private void CallReceive(IAsyncResult ar)
{
try
{
if (socket != null)
{
int rec_count = socket.EndReceive(ar);
Model.IPPacket packet = new Model.IPPacket();
switch (rec_buffer[9])
{
case 1: packet.Protocol = "ICMP";
break;
case 2: packet.Protocol = "IGMP";
break;
case 6: packet.Protocol = "TCP";
break;
case 17: packet.Protocol = "UDP";
break;
default: packet.Protocol = "UNKNOWN";
break;
}
if (string.IsNullOrEmpty(this.Protocol) || this.Protocol == packet.Protocol)
{
int totalLength = BitConverter.ToInt32(new byte[4] {
rec_buffer[3], rec_buffer[2], 0, 0
}, 0);
byte[] sourceAddress = new byte[4];
Array.Copy(rec_buffer, 12, sourceAddress, 0, 4);
packet.SourceIP = new IPAddress(sourceAddress).ToString();
byte[] targetAddress = new byte[4];
Array.Copy(rec_buffer, 16, targetAddress, 0, 4);
packet.TargetIP = new IPAddress(targetAddress).ToString();
packet.SourcePort = BitConverter.ToInt32(new byte[4] {
rec_buffer[21], rec_buffer[20], 0, 0
}, 0);
packet.TargetPort = BitConverter.ToInt32(new byte[4] {
rec_buffer[23], rec_buffer[22], 0, 0
}, 0);
if ((this.SourcePort == 0 || this.SourcePort == packet.SourcePort) &&
(this.TargetPort == 0 || this.TargetPort == packet.TargetPort))
{
packet.ReceiveBuffer = new byte[totalLength];
Array.Copy(rec_buffer, 20, packet.ReceiveBuffer, 0, totalLength);
if (RecPacket != null)
{
RecPacket(packet);
}
}
}
Recevice();
}
}
catch (Exception)
{ }
}
void sniffer_RecPacket(Model.IPPacket packet)
{
dgPacket.Invoke(new MethodInvoker(delegate
{
lstRecPacket.Insert(0, packet);
}));
}
private void dgPacket_SelectionChanged(object sender, EventArgs e)
{
if (dgPacket.SelectedRows.Count > 0)
{
Model.IPPacket packet = lstRecPacket[dgPacket.SelectedRows[0].Index];
string strCMD = "";
foreach (byte b in packet.ReceiveBuffer)
{
strCMD += string.Format("{0:X2} ", b);
}
txtData.Text = strCMD;
}
}
private void dgPacket_SelectionChanged(object sender, EventArgs e)
{
if (dgPacket.SelectedRows.Count > 0)
{
Model.IPPacket packet = lstRecPacket[dgPacket.SelectedRows[0].Index];
string strCMD = "";
foreach (byte b in packet.ReceiveBuffer)
{
strCMD += string.Format("{0:X2} ", b);
}
//strCMD = packet.RecTime +"]: "+ strCMD;
txtData.Text = strCMD;
//strCMD += packet.Protocol + "\n";
//strCMD += packet.RecTime + "\n";
//strCMD += Encoding.ASCII.GetString(packet.ReceiveBuffer) + "\n";
//Console.WriteLine(strCMD);
}
}
