以下的代码的原作是opensource的一个叫sniffer.net的，用vb.net写的，这里只是简单的用c#翻译了一下，暂时还只能监控所有数据包，不能监控某一个进程的数据包,代码如下：
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
namespace UpdateTester
{
/**//// <summary>
/// Monitor 的摘要说明。
/// </summary>
public class Monitor
{
public delegate void NewPacketEventHandler(Monitor m, Packet p);
public event NewPacketEventHandler NewPacket;
private Socket m_Monitor;
private IPAddress m_Ip;
private byte[] m_Buffer = new byte[65535];
private const System.Int32 IOC_VENDOR = 0x18000000;
private const int IOC_IN = -2147483648;
private const int SIO_RCVALL = IOC_IN ^ IOC_VENDOR ^ 1;
private const int SECURITY_BUILTIN_DOMAIN_RID = 0x20;
private const int DOMAIN_ALIAS_RID_ADMINS = 0x220;
public System.Net.IPAddress IP
{
get { return m_Ip; }
}
public byte[] Buffer
{
get { return m_Buffer; }
}
public Monitor()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
public Monitor(IPAddress IpAddress)
{
if (!(Environment.OSVersion.Platform == PlatformID.Win32NT) && Environment.OSVersion.Version.Major<5)
{
throw new NotSupportedException("This program requires Windows 2000, Windows XP or Windows .NET Server!");
}
m_Ip = IpAddress;
}
public void Start()
{
if (m_Monitor==null)
{
try
{
m_Monitor = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);
m_Monitor.Bind(new IPEndPoint(IP, 0));
m_Monitor.IOControl(SIO_RCVALL, BitConverter.GetBytes(1), null);
m_Monitor.BeginReceive(m_Buffer, 0, m_Buffer.Length, SocketFlags.None, new AsyncCallback(OnReceive), null);
}
catch (Exception e)
{
m_Monitor = null;
throw new SocketException();
}
}
}
public void Stop()
{
if (m_Monitor!=null)
{
m_Monitor.Close();
}
m_Monitor = null;
}
public void OnReceive(System.IAsyncResult ar)
{
try
{
int received = m_Monitor.EndReceive(ar);
try
{
if (m_Monitor!=null)
{
byte[] pkt = new byte[received];
Array.Copy(Buffer, 0, pkt, 0, received);
OnNewPacket(new Packet(pkt, DateTime.Now));
}
}
catch(Exception e)
{
throw;
}
m_Monitor.BeginReceive(Buffer, 0, Buffer.Length, SocketFlags.None, new AsyncCallback(OnReceive), null);
}
catch (Exception e)
{
}
}
protected void OnNewPacket(Packet p)
{
NewPacket(this, p);
}
}
}
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace UpdateTester
{
public enum Precedence
{
Routine = 0,
Priority = 1,
Immediate = 2,
Flash = 3,
FlashOverride = 4,
CRITICECP = 5,
InternetworkControl = 6,
NetworkControl = 7
}
public enum Delay
{
NormalDelay = 0,
LowDelay = 1
}
public enum Throughput
{
NormalThroughput = 0,
HighThroughput = 1
}
public enum Reliability
{
NormalReliability = 0,
HighReliability = 1
}
public enum Protocol
{
Ggp = 3,
Icmp = 1,
Idp = 22,
Igmp = 2,
IP = 4,
ND = 77,
Pup = 12,
Tcp = 6,
Udp = 17,
Other = -1
}
/**//// <summary>
/// Packet 的摘要说明。
/// </summary>
public class Packet
{
private byte[] m_Raw;
private DateTime m_Time;
private int m_Version;
private int m_HeaderLength;
private Precedence m_Precedence;
private Delay m_Delay;
private Throughput m_Throughput;
private Reliability m_Reliability;
private int m_TotalLength;
private int m_Identification;
private int m_TimeToLive;
private Protocol m_Protocol;
private byte[] m_Checksum;
private string m_SourceAddress;
private string m_DestinationAddress;
private int m_SourcePort;
private int m_DestinationPort;
public Packet()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
//
// public Packet(byte[] raw):(byte[] raw, DateTime time)
// {
// Packet(raw, DateTime.Now);
// }
public Packet(byte[] raw, DateTime time)
{
if (raw==null)
{
throw new ArgumentNullException();
}
if (raw.Length<20)
{
throw new ArgumentException();
}
this.m_Raw = raw;
this.m_Time = time;
this.m_HeaderLength = (raw[0] & 0xF) * 4;
if ((raw[0] & 0xF) < 5) {throw new ArgumentException();}
this.m_Precedence = (Precedence)((raw[1] & 0xE0) >> 5);
this.m_Delay = (Delay)((raw[1] & 0x10) >> 4);
this.m_Throughput = (Throughput)((raw[1] & 0x8) >> 3);
this.m_Reliability = (Reliability)((raw[1] & 0x4) >> 2);
this.m_TotalLength = raw[2] * 256 + raw[3];
if ( ! (this.m_TotalLength == raw.Length)) { throw new ArgumentException();} // invalid size of packet;
this.m_Identification = raw[4] * 256 + raw[5];
this.m_TimeToLive = raw[8];
m_Protocol = (Protocol)raw[9];
m_Checksum = new byte[2];
m_Checksum[0] = raw[11];
m_Checksum[1] = raw[10];
try
{
m_SourceAddress = GetIPAddress(raw, 12);
m_DestinationAddress = GetIPAddress(raw, 16);
}
catch (Exception e)
{
throw;
}
if (m_Protocol == Protocol.Tcp || m_Protocol == Protocol.Udp)
{
m_SourcePort = raw[m_HeaderLength] * 256 + raw[m_HeaderLength + 1];
m_DestinationPort = raw[m_HeaderLength + 2] * 256 + raw[m_HeaderLength + 3];
}
else
{