Wrapping WinPCap with DLLImports

[Nuno Magalhaes]

Hello all,

Below I have a function that captures a packet and sends that packet to
a Receive function (wether it is sent or received).

I'm asking what functions should I use (what imports should I use and a
sample of source code) in order to get a "byte[] buf" filled with a
packet and using WinPCap lib.

Thank you very much,
Nuno Magalhaes.

--------------------------------------------------

public void Run()
{
int len_receive_buf=4096;
int len_send_buf=4096;
byte[] receive_buf=new byte[len_receive_buf];
byte[] send_buf=new byte[len_send_buf];
int cout_receive_bytes;
Socket socket=new
Socket(AddressFamily.InterNetwork,SocketType.Raw,ProtocolType.IP);
socket.Blocking=false;
socket.Bind(new IPEndPoint(IPAddress.Parse(DefaultIPComboBox.Text),0));

socket.SetSocketOption(SocketOptionLevel.IP,SocketOptionName.HeaderIncluded­,1);

byte[] IN=new byte[4]{1,0,0,0};
byte[] OUT=new byte[4];
int SIO_RCVALL=unchecked((int)0x98000001);
int ret_code=socket.IOControl(SIO_RCVALL,IN,OUT);
while(true)
{
IAsyncResult
ar=socket.BeginReceive(receive_buf,0,len_receive_buf,SocketFlags.None,null,­this);

cout_receive_bytes=socket.EndReceive(ar);
Receive(receive_buf);
}
}

 

[Sanjeevakumar Hiremath]

Check out this link.
http://www.codeproject.com/csharp/pktcap.asp

Regards,
Sanjeevakumar Hiremath

Hello all,

Below I have a function that captures a packet and sends that packet to
a Receive function (wether it is sent or received).

I'm asking what functions should I use (what imports should I use and a
sample of source code) in order to get a "byte[] buf" filled with a
packet and using WinPCap lib.

Thank you very much,
Nuno Magalhaes.

--------------------------------------------------

public void Run()
{
int len_receive_buf=4096;
int len_send_buf=4096;
byte[] receive_buf=new byte[len_receive_buf];
byte[] send_buf=new byte[len_send_buf];
int cout_receive_bytes;
Socket socket=new
Socket(AddressFamily.InterNetwork,SocketType.Raw,ProtocolType.IP);
socket.Blocking=false;
socket.Bind(new IPEndPoint(IPAddress.Parse(DefaultIPComboBox.Text),0));

socket.SetSocketOption(SocketOptionLevel.IP,SocketOptionName.HeaderIncluded­,1);

byte[] IN=new byte[4]{1,0,0,0};
byte[] OUT=new byte[4];
int SIO_RCVALL=unchecked((int)0x98000001);
int ret_code=socket.IOControl(SIO_RCVALL,IN,OUT);
while(true)
{
IAsyncResult
ar=socket.BeginReceive(receive_buf,0,len_receive_buf,SocketFlags.None,null,­this);

cout_receive_bytes=socket.EndReceive(ar);
Receive(receive_buf);
}
}

 

[Nuno Magalhaes]

Doesn't work here.

I've seen this two links but am not able to do nothing with it:
http://groups.google.pt/group/micro...ap_open_live+C#&rnum=2&hl=en#2f12e572ae7bb273

http://groups.google.pt/group/micro...ve+pcap_next_ex&rnum=1&hl=en#47ba221be042f86e

If you could post some sample code on how do I (in a specified IP)
could catch any packets (byte[] buf) using C# and winPcap or other
library like PacketX.dll I would be fully apreciatted.

Thanks very much,
Nuno Magalhaes.