How to reassemble TCP packets

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I am now developing a project using Winpcap.. I know that packets being sniffed are usually fragmented packets.

How can I reassemble these TCP fragments?.. Are any ideas, suggestions, or tutorials available?

I am assuming this to be the only way I can view the HTTP header...

Thanks!

Posted 13-Feb-10 12:06pm

amihar1727

Updated 14-Feb-10 5:48am

Smitha Nishant

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HimanshuJoshi · Answer 1 · 2010-02-22T19:03:00

Solution 1

All the TCP packets contain TCP sequence number. To re-assemble the data, you just need to start at the Initial sequence number packet and going from lowest to highest sequence number

TCP header structure[^]

TCP initial sequence number[^]

Posted 22-Feb-10 19:03pm

HimanshuJoshi