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, 9 Jun 2004
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Enhance netstat and packet filtering.

Sample Image - EnetstatX_img.jpg


This article represents an update to my previous one "Enhance netstat". What's new regarding EnetstatX? It has packet filtering capabilities, sniffing using raw sock (disabled from menu, but could be enabled and extended by developers) and pop-up taskbar notifier concerning incoming and outgoing connections.


What it does and base functionalities?

We have three base functionalities:

  • TCP connection manager
  • UDP connection manager
  • Packet filtering
  • Packet sniffing

How it does it?

  • TCP & UDP connection manager is using the following APIs:
     // Gets extended TCP Connection/UDP Listener Table //
     // ! Note -> imported function from iphlpapi.dll          //
    typedef DWORD (WINAPI *pAllocateAndGetTcpExTableFromStack)(
         IN OUT PMIB_TCPTABLE_EX *pTcpTableEx, 
         IN BOOL,
         IN HANDLE,
         IN DWORD, 
         IN DWORD);
    typedef DWORD (WINAPI *pAllocateAndGetUdpExTableFromStack) (
         IN OUT PMIB_UDPTABLE_EX *pUdpTableEx , 
         IN BOOL,
         IN HANDLE,
         IN DWORD,
         IN DWORD);
    class content: CTCPTable and CUDPClass
  • Packet filtering is using the following APIs (iphlpapi.lib):
             class content: CFilter
  • Packet sniffing is using raw socket capabilities:
             // Create a raw socket 
             socket(AF_INET, SOCK_RAW, IPPROTO_IP);
             // Set sock option
                  (const char *)&rcvtimeo,
             class content: CFilter

How to use it?

Hmmm ... Run it, and there will be no problem. The graphical interface is intuitive, I hope ;).

Note: WinXP supported only.


In the final step, I would like to tell you guys that maybe there will be an update to this article regarding design part. I didn't have much time to do it, but if one of you are interested to cooperate or to continue this project, I can give you some ideas, and if necessary all my support. What more can be done? I was thinking that it could be nice to have a "passive OS fingerprinting" module that can detect the OS of connected computers. Another module can be to focus on "report and statistics" with compare capabilities and "what's new about my connection activities" ...




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About the Author

Web Developer
Romania Romania
No Biography provided

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Comments and Discussions

GeneralRe: I'm waiting to give this a 5, but... Pin
Gabriel 210-Jun-04 12:35
memberGabriel 210-Jun-04 12:35 
GeneralRe: I'm waiting to give this a 5, but... Pin
Friedhelm Schuetz11-May-05 22:45
memberFriedhelm Schuetz11-May-05 22:45 
GeneralRe: I'm waiting to give this a 5, but... Pin
Gabriel 212-May-05 8:55
memberGabriel 212-May-05 8:55 
GeneralWindows 2000 fix. Pin
Gabriel 210-Jun-04 7:33
memberGabriel 210-Jun-04 7:33 
GeneralRe: Windows 2000 fix. Pin
dungbkhn5-Dec-04 22:42
memberdungbkhn5-Dec-04 22:42 
GeneralRe: Windows 2000 fix. Pin
y0da6-Dec-04 1:26
membery0da6-Dec-04 1:26 
GeneralRe: Windows 2000 fix. Pin
y0da6-Dec-04 1:29
membery0da6-Dec-04 1:29 

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