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How to see / check reassemble(d) the tcp packets

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I want to check the diameter protocol packets which consists some TCP reassemble packets too. Current version is wireshark 3.2.1

Dilli Babu's avatar
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Dilli Babu
asked 2020-01-25 00:17:37 +0000
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What is it you're checking for? If a DIAMETER message doesn't fit entirely within one TCP segment, there will be packets shown as TCP and as part of the reassembled message, if Wireshark is doing reassembly of DIAMETER packets split over multiple TCP segments.

Guy Harris's avatar Guy Harris (2020-01-25 04:07:32 +0000) edit
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Hi Harris, I'm Checking for diameter packets length. But TCP segment was reassembled. I want to see those reassembled packets also in wireshark. Currently I am not able to see it.

Dilli Babu's avatar Dilli Babu (2020-01-25 04:37:28 +0000) edit
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In short, I wanted to know how to view the tcp reassembled packets in Wireshark. When the Diameter message doesn't fit in single TCP segment

Dilli Babu's avatar Dilli Babu (2020-01-25 04:39:06 +0000) edit
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Can you check your Wireshark preferences and be sure that the TCP preference to "Allow subdissector to reassemble TCP streams" is enabled?

cmaynard's avatar cmaynard (2020-01-27 15:29:29 +0000) edit
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Yes, it works! Thanks a lot.. @cmaynard

Dilli Babu's avatar Dilli Babu (2020-01-27 18:35:51 +0000) edit
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Make sure that both the TCP preference "Allow subdissector to reassemble TCP streams" (as per Chris Maynard's comment) and the DIAMETER preference "Reassemble Diameter messages spanning multiple TCP segments" are both enabled (the checkbox has a check in it).

Go to Edit > Preferences on Windows or UN*Xes (such as Linux) that aren't macOS, or Wireshark > Preferences in macOS, and look under "Protocols" for those preferences (each protocol has an item under "Protocols"; look at the items for DIAMETER and TCP).

Guy Harris's avatar
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Guy Harris
answered 2020-01-27 18:29:07 +0000
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Thanks for the detailed explanation. I got that working! @Guy Harris

Dilli Babu's avatar Dilli Babu (2020-01-27 18:37:10 +0000) edit
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