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Posted 9 Jun 2004


, 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

QuestionAlways 87!!! Pin
eRRaTuM16-Mar-08 4:33
membereRRaTuM16-Mar-08 4:33 
AnswerRe: Always 87!!! Pin
eRRaTuM16-Mar-08 7:15
membereRRaTuM16-Mar-08 7:15 
GeneralPacket capture Pin
Jan Stetka16-May-07 0:29
memberJan Stetka16-May-07 0:29 
GeneralCompilation of project onVS 2005 Pin
chigo5814-Apr-06 5:02
memberchigo5814-Apr-06 5:02 
GeneralRe: Compilation of project onVS 2005 Pin
chigo5814-Apr-06 5:08
memberchigo5814-Apr-06 5:08 
QuestionHow to block and allow the packets so it can act as a firewall Pin
saravananvv9-Jun-05 2:57
membersaravananvv9-Jun-05 2:57 
QuestionHow to list process and port on window98? Pin
dungbkhn16-May-05 15:57
memberdungbkhn16-May-05 15:57 
AnswerRe: How to list process and port on window98? Pin
y0da17-May-05 19:56
membery0da17-May-05 19:56 
GeneralRe: How to list process and port on window98? Pin
dungbkhn18-May-05 4:57
memberdungbkhn18-May-05 4:57 
Generalsniff grayed Pin
Friedhelm Schuetz11-May-05 22:48
memberFriedhelm Schuetz11-May-05 22:48 
GeneralRe: sniff grayed Pin
y0da11-May-05 23:18
membery0da11-May-05 23:18 
Generalconnection status Pin
Anonymous21-Apr-05 16:50
memberAnonymous21-Apr-05 16:50 
Generaladding full path Pin
Member 39200425-Jan-05 19:39
memberMember 39200425-Jan-05 19:39 
QuestionHow to do this work on Win98 Pin
Anonymous27-Dec-04 16:01
memberAnonymous27-Dec-04 16:01 
GeneralNo path /res in source Pin
NielsR15-Sep-04 4:22
memberNielsR15-Sep-04 4:22 
GeneralRe: No path /res in source Pin
y0da15-Sep-04 5:05
membery0da15-Sep-04 5:05 
Generalrunning EnestatX on Win2000 Pin
y0da13-Jun-04 21:30
membery0da13-Jun-04 21:30 
GeneralRe: running EnestatX on Win2000 Pin
TaknuMone14-Jun-04 2:21
memberTaknuMone14-Jun-04 2:21 
GeneralRe: running EnestatX on Win2000 Pin
Member 39528514-Jun-04 10:19
memberMember 39528514-Jun-04 10:19 
GeneralRe: running EnestatX on Win2000 Pin
NielsR15-Sep-04 7:15
memberNielsR15-Sep-04 7:15 
GeneralRe: running EnestatX on Win2000 Pin
zcy_beijing30-Jun-05 18:12
memberzcy_beijing30-Jun-05 18:12 
The function "AllocateAndGetTcoTableFromStack" can only get PMIB_TCPTABLE, not PMIB_TCPTABLE_EX, so we can't get the process info related with the tcp port on Win2k using this method. Simply replace AllocateAndGetTcpExTableFromStack with AllocateAndGetTcpTableFromStack will not work , you should change the type of variant m_pBuffTcpTableEx from PMIB_TCPTABLE_EX to PMIB_TCPTABLE, All MIB_TCPROW_EX to MIB_TCPROW etc. But you can't get the processid info however. So i think it is nonsense to change the codes to run on Win2k. If you want get the result as this program on WinXP, you can use the method of FPort used. The source code of FPort can be finded by the link
GeneralRe: running EnestatX on Win2000 Pin
silencew5-Jul-05 8:09
membersilencew5-Jul-05 8:09 
GeneralGot it to compile on w2k but... Pin
TaknuMone12-Jun-04 15:29
memberTaknuMone12-Jun-04 15:29 
GeneralI'm waiting to give this a 5, but... Pin
prcarp10-Jun-04 10:47
memberprcarp10-Jun-04 10:47 
General... partially fixed Pin
prcarp10-Jun-04 11:10
memberprcarp10-Jun-04 11:10 

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