Wireshark - How to filter on JSON content not sent over HTTP

Question

I have a windows service that uses winsock communicating to another windows service that uses winsock. We are talking over TCP/IP using JSON.

I am trying to prove that my service is behaving properly and that the service it communicates to is not sending the expected data.

I set up wireshark to capture on the Ethernet card I am using on my local machine and filter on ip.addr == and I can see the traffic.

I am expecting messages that contain "Message One" and I can see them, thousands of them. While I am receiving all those, I expect a few messages that contain "Message Two"

How do I set up the filter to prove that I am not receiving the "Message Two" messages?

I Googled a little bit and someone said use data-text-lines contains "Message Two", but that doesn't work. I can verify it doesn't work by looking at the messages that contain "Message One" and then filtering data-text-line contains "Message One" and they all disappear when they shouldn't. I have a feeling that is for http only.

What do I use for a filter?

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EDIT - To reply to v.j's response and have the ability to upload an img:

I do not see the "Expression" button. Here are some screenshots.

Solution 1

Wireshark supports filter for JSON as well. Go to Analyze->Display Filter and then click on Expression button to configure different Filter String like -> JSON object, JSON Array etc. along with relation like "contains" or "is present"

This should help to set up JSON related filters.

EDIT: Attaching screenshot on how to access expression via button

EDIT2: Expression can be accessed in Wireshark Version 2.4.0 as shown below

Solution 2

Use this:

 http.content_type == "application/json"