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intercepting winsock

Posted on 1998-01-29
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Last Modified: 2013-12-03
I need to do something as Socket Spy 32.
I want my program to start an application and
then intercept all winsock calls.
How can I do that?

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Question by:jct052097
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by:anichini
ID: 1410608
Matt Pietrek did something similar in Microsoft System's Journal Volume 12 Number 9 (September 1997), where he wrote something that could spy the wininet.dll. Check out the Under the Hood article. Perhaps the techniques he uses there are applicable to winsock.

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by:tflai
ID: 1410609
You can write a Winsock Helper kernel-mode driver that will act as an intermediate driver between Winsock and MSTCP protocol driver.  There is an example in the NT's DDK.  Why do you want to go through all that trouble and actually intercept all Winsock calls.  If you just want to monitor Winsock calls, probably anichini's proposed approach would do.
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by:jct052097
ID: 1410610
MSCTCP protocol?
where I can find NT's DDK? it's free?
what's anichini proposed approach? where I can find it?

do you know wether Socket Spy 32 uses a Winsock Helper kernel-mode driver?

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by:jct052097
ID: 1410611
MSCTCP protocol?
where I can find NT's DDK? it's free?

where I can find the Microsoft System's Journal?

do you know wether Socket Spy 32 uses a Winsock Helper kernel-mode driver?

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by:tflai
ID: 1410612
MSTCP protocol driver - Microsoft TCP/IP Protocol driver.
NTDDK - Device Driver Kit, get it by subscripting to MSDN.
Microsoft System's Journal - MSJ, on-shelf magazine.
I've looked at Socket Spy 32, it looks like that it uses API spy technique rather than using kernel-mode driver.  It can only monitor IP traffic of applications that were launched from within the program.  A kernel-mode intermediate driver would be able to monitor/intercept any IP traffic.
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by:jct052097
ID: 1410613
Not really.
Socket Spy 32 receives the winsock data, look for
a pattern, change for another and then send
the modifed data to the application.

I am just like in the beginning.
I don't know how to monitor and if possible intercept winsock
data for a single application.
Where I can find the microsoft system journal?


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Accepted Solution

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AlFa earned 100 total points
ID: 1410614
Get the code of TCPDUMP command of freeBSD (it's unix but sockets have the same philosophy) and do something with it.
You can also get a win tcpdump in a hacker site (do not repeat it!)
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by:AlFa
ID: 1410615
Sorry I 've just sent a comment. what did my mouse has done!..
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