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I am able to reassemble fragments successfully if there is a complete message. However if there are missing fragments my dissector continues to reassemble the next message along with the message that has the missing fragments. I can calculate how many fragments there are supposed to be before I begin reassembly but my first indication that there are missing fragments is when I come across the initial frame for the next fragmented packet. Is there a way that I can tell my reassembly to immediately stop reassembling at the previous fragment and begin a new reassembly at the current initial fragment. Either that or can I look at the next future packet to check if it is the next fragment or an initial fragment to another message?

asked 09 Jun '17, 08:58

jpetersen's gravatar image

accept rate: 0%

The new fragment sequence should be using a new sequence id, so that the original sequence is left unreassembled.

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answered 09 Jun '17, 10:06

grahamb's gravatar image

grahamb ♦
accept rate: 22%


Thank you that worked.

For anyone facing a similar problem: I didn't have any sequence ID info in the header for the file so I just used the frame number of the initial fragment for my sequence ID.

(09 Jun '17, 11:33) jpetersen
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question asked: 09 Jun '17, 08:58

question was seen: 1,008 times

last updated: 09 Jun '17, 12:54

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