C# снифер < Error [Архив] - Форум АНТИЧАТ

Jes

07.01.2008, 00:56

вот такой класс потока ловит Exception "Specified argument was out of range of valid values. Parametr name: newAdress" , голова вообще(!) не варит в день воскресный , поделитесь МосКом?
(или рабочим исходником сниффера на C#)

namespace Leon.RawThread
{
using System;
using System.Threading;
using Leo.LeonForm;
using System.Windows.Forms;
using System.Diagnostics;
using System.Net.Sockets;
using System.Net;
using System.Text;
using Leo.RawSockets;
using System.Runtime.InteropServices;
public class RawSocket : BaseSocket
{
public RawSocket():base(){}
ListBox list = null;
public ListBox Out
{
get
{
return list;
}
set
{
list = value;
}
}
unsafe public override void Receive(byte []buf, int len)
{
long ip_srcaddr = 10, ip_destaddr = 10, header_len = 0;
string out_string = "";
int protocol;
short src_port = 0, dst_port = 0;
IPAddress tmp_ip;
string from_ip, to_ip;
fixed(byte *fixed_buf = buf)
{
IpHeader * header = (IpHeader *)fixed_buf;
header_len = (header->ip_verlen & 0x0F) << 2;
protocol = header->ip_protocol;
ip_srcaddr = header->ip_srcaddr;
ip_destaddr = header->ip_destaddr;
tmp_ip = new IPAddress(ip_srcaddr);
from_ip = tmp_ip.ToString();
tmp_ip = new IPAddress(ip_destaddr);
to_ip = tmp_ip.ToString();
tmp_ip = null;
switch(protocol)
{
case 1: out_string = "ICMP:";break;
case 2: out_string = "IGMP:";break;
case 6:
out_string = "TCP:";
src_port = *(short *)&fixed_buf[header_len];
dst_port = *(short *)&fixed_buf[header_len +2];
from_ip += ":" + IPAddress.NetworkToHostOrder(src_port).ToString();
to_ip += ":" + IPAddress.NetworkToHostOrder(dst_port).ToString();
break;
case 17: out_string = "UDP:";
src_port = *(short *)&fixed_buf[header_len];
dst_port = *(short *)&fixed_buf[header_len +2];
from_ip += ":" + IPAddress.NetworkToHostOrder(src_port).ToString();
to_ip += ":" + IPAddress.NetworkToHostOrder(dst_port).ToString();
break;
default: out_string = "UNKNOWN";break;
}
}

out_string += from_ip + "--->" + to_ip.ToString();
list.Items.Add(out_string);

out_string = "total length: " + len.ToString() + " bytes";
list.Items.Add(out_string);

out_string = "data length: " + (len - header_len).ToString() + " bytes";
list.Items.Add(out_string);

}

public void Run()
{
int cout_receive_bytes;
while(true)
{
IAsyncResult ar = socket.BeginReceive(receive_buf, 0, len_receive_buf, SocketFlags.None, new AsyncCallback(CallReceive), this);
cout_receive_bytes = socket.EndReceive(ar);
Receive(receive_buf, cout_receive_bytes);
}

}

virtual public void CallReceive(IAsyncResult ar)
{
}

}

internal class RawWorker
{
private MainForm form = null;
public RawSocket ReceiveAll = new RawSocket();
public MainForm RawForm
{
set
{
form = value;
}
}
private string ip = null;
public string SelectedIP
{
set
{
ip = string.Copy(value);
}
}
public void Run()
{
try
{
ReceiveAll.CreateAndBindSocket(ip);
if(ReceiveAll.SetSockoption() != true)
{
MessageBox.Show("Invalid call SetSocketOption");
return;
}
ReceiveAll.Run();
}
catch(ThreadAbortException)
{
ReceiveAll.Shutdown();
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
}
}
}