How to wrap winpcap

[Nuno Magalhaes]

How can I use WinPcap or PacketX.dll to catch any packets that flow on
my machine network adapter?

Is there any sample code on how to do this?

I would like something like this... and without using any additional
..dlls:

-----------------------------------------------
using System;
using System.Text;
using System.Runtime. InteropServices ;
using System.Diagnost ics;
namespace wpcapnet
{
//for the easiest way, there are only pointers, not structures
public delegate void pcap_handler(In tPtr i, IntPtr hdr, IntPtr stat);
public class pcap
{
//char *pcap_lookupdev (char *);
[DllImport("wpca p.dll")]
static extern IntPtr pcap_lookupdev( ref int errbuf);
//pcap_t *pcap_open_live (char *, int, int, int, char *);
[DllImport("wpca p.dll")]
static extern int pcap_open_live( string device, int snaplen, int
promisc,
int to_ms, StringBuilder errbuf);
//void pcap_close(pcap _t *);
[DllImport("wpca p.dll")]
static extern void pcap_close(int device);
//int pcap_setmode(pc ap_t *p, int mode);
[DllImport("wpca p.dll")]
static extern int pcap_setmode(in t device, int mode);
[DllImport("wpca p.dll")]
static extern int pcap_setbuff(in t device, int buffsize);
//int pcap_loop(pcap_ t *, int, pcap_handler, u_char *);
[DllImport("wpca p.dll")]
static extern int pcap_loop(int device, int cnt, pcap_handler
callback,
IntPtr i);
//const u_char* pcap_next(pcap_ t *, struct pcap_pkthdr *);
[DllImport("wpca p.dll")]
static extern pcap_stat pcap_next(int device, ref pcap_pkthdr
pkthdr);
//callback function
private static void OnStatistic(Int Ptr i, IntPtr hdr, IntPtr stat)
{
Debug.WriteLine (DateTime.Now.T oString());
}
public pcap_handler OnStatisticPtr = new pcap_handler(On Statistic);
public void Test()
{
StringBuilder errbuf = new StringBuilder(2 56);
IntPtr answ = pcap_lookupdev( ref buf);
String devicename = Marshal.PtrToSt ringAuto(answ);
Debug.WriteLine (devicename);
int device = pcap_open_live( devicename,1,1, 1000, errbuf);
Debug.WriteLine (device.ToStrin g());
int result = pcap_setmode(de vice,1);
Debug.WriteLine ("setmode:"+res ult.ToString()) ;
result = pcap_setbuff(de vice,0);
int answ2 = pcap_loop(devic e, 5, OnStatisticPtr, answ);
pcap_close(devi ce);
}
}

[Ignacio Machin \( .NET/ C# MVP \)]

hi

take a look at www.pinvoke.net

cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Nuno Magalhaes" <nu************ @hotmail.com> wrote in message
news:11******** **************@ g44g2000cwa.goo glegroups.com.. .

How can I use WinPcap or PacketX.dll to catch any packets that flow on
my machine network adapter?

Is there any sample code on how to do this?

I would like something like this... and without using any additional
.dlls:

-----------------------------------------------
using System;
using System.Text;
using System.Runtime. InteropServices ;
using System.Diagnost ics;
namespace wpcapnet
{
//for the easiest way, there are only pointers, not structures
public delegate void pcap_handler(In tPtr i, IntPtr hdr, IntPtr stat);
public class pcap
{
//char *pcap_lookupdev (char *);
[DllImport("wpca p.dll")]
static extern IntPtr pcap_lookupdev( ref int errbuf);
//pcap_t *pcap_open_live (char *, int, int, int, char *);
[DllImport("wpca p.dll")]
static extern int pcap_open_live( string device, int snaplen, int
promisc,
int to_ms, StringBuilder errbuf);
//void pcap_close(pcap _t *);
[DllImport("wpca p.dll")]
static extern void pcap_close(int device);
//int pcap_setmode(pc ap_t *p, int mode);
[DllImport("wpca p.dll")]
static extern int pcap_setmode(in t device, int mode);
[DllImport("wpca p.dll")]
static extern int pcap_setbuff(in t device, int buffsize);
//int pcap_loop(pcap_ t *, int, pcap_handler, u_char *);
[DllImport("wpca p.dll")]
static extern int pcap_loop(int device, int cnt, pcap_handler
callback,
IntPtr i);
//const u_char* pcap_next(pcap_ t *, struct pcap_pkthdr *);
[DllImport("wpca p.dll")]
static extern pcap_stat pcap_next(int device, ref pcap_pkthdr
pkthdr);
//callback function
private static void OnStatistic(Int Ptr i, IntPtr hdr, IntPtr stat)
{
Debug.WriteLine (DateTime.Now.T oString());
}
public pcap_handler OnStatisticPtr = new pcap_handler(On Statistic);
public void Test()
{
StringBuilder errbuf = new StringBuilder(2 56);
IntPtr answ = pcap_lookupdev( ref buf);
String devicename = Marshal.PtrToSt ringAuto(answ);
Debug.WriteLine (devicename);
int device = pcap_open_live( devicename,1,1, 1000, errbuf);
Debug.WriteLine (device.ToStrin g());
int result = pcap_setmode(de vice,1);
Debug.WriteLine ("setmode:"+res ult.ToString()) ;
result = pcap_setbuff(de vice,0);
int answ2 = pcap_loop(devic e, 5, OnStatisticPtr, answ);
pcap_close(devi ce);
}
}

[Nuno Magalhaes]

The www.pinvoke.net site is cool but I can't see any reference to
wpcap. :(
Any other sites like this which has the reference or sample code?

Thanks,
Nuno Magalhaes.

Ignacio Machin ( .NET/ C# MVP ) wrote:

hi

take a look at www.pinvoke.net

cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Nuno Magalhaes" <nu************ @hotmail.com> wrote in message
news:11******** **************@ g44g2000cwa.goo glegroups.com.. .

How can I use WinPcap or PacketX.dll to catch any packets that flow on
my machine network adapter?

Is there any sample code on how to do this?

I would like something like this... and without using any additional
.dlls:

-----------------------------------------------
using System;
using System.Text;
using System.Runtime. InteropServices ;
using System.Diagnost ics;
namespace wpcapnet
{
//for the easiest way, there are only pointers, not structures
public delegate void pcap_handler(In tPtr i, IntPtr hdr, IntPtr stat);
public class pcap
{
//char *pcap_lookupdev (char *);
[DllImport("wpca p.dll")]
static extern IntPtr pcap_lookupdev( ref int errbuf);
//pcap_t *pcap_open_live (char *, int, int, int, char *);
[DllImport("wpca p.dll")]
static extern int pcap_open_live( string device, int snaplen, int
promisc,
int to_ms, StringBuilder errbuf);
//void pcap_close(pcap _t *);
[DllImport("wpca p.dll")]
static extern void pcap_close(int device);
//int pcap_setmode(pc ap_t *p, int mode);
[DllImport("wpca p.dll")]
static extern int pcap_setmode(in t device, int mode);
[DllImport("wpca p.dll")]
static extern int pcap_setbuff(in t device, int buffsize);
//int pcap_loop(pcap_ t *, int, pcap_handler, u_char *);
[DllImport("wpca p.dll")]
static extern int pcap_loop(int device, int cnt, pcap_handler
callback,
IntPtr i);
//const u_char* pcap_next(pcap_ t *, struct pcap_pkthdr *);
[DllImport("wpca p.dll")]
static extern pcap_stat pcap_next(int device, ref pcap_pkthdr
pkthdr);
//callback function
private static void OnStatistic(Int Ptr i, IntPtr hdr, IntPtr stat)
{
Debug.WriteLine (DateTime.Now.T oString());
}
public pcap_handler OnStatisticPtr = new pcap_handler(On Statistic);
public void Test()
{
StringBuilder errbuf = new StringBuilder(2 56);
IntPtr answ = pcap_lookupdev( ref buf);
String devicename = Marshal.PtrToSt ringAuto(answ);
Debug.WriteLine (devicename);
int device = pcap_open_live( devicename,1,1, 1000, errbuf);
Debug.WriteLine (device.ToStrin g());
int result = pcap_setmode(de vice,1);
Debug.WriteLine ("setmode:"+res ult.ToString()) ;
result = pcap_setbuff(de vice,0);
int answ2 = pcap_loop(devic e, 5, OnStatisticPtr, answ);
pcap_close(devi ce);
}
}

[-DG-]

On 28 Oct 2005 06:40:11 -0700, "Nuno Magalhaes"
<nu************ @hotmail.com> wrote:

How can I use WinPcap or PacketX.dll to catch any packets that flow on
my machine network adapter?

http://www.codeproject.com/csharp/pacanal.asp
http://www.codeproject.com/csharp/pktcap.asp