Diag output structure of Qualcomm modems

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morteza ali Ahmadi morteza.ali.ahmadi at gmail.com
Sun Dec 8 21:29:53 UTC 2019


Hi friends...
Sorry to disturb you...

I have a Qualcomm Quectel EC25 modem which I can send AT-Commands to this
module with reciving the response. I store this modem diag bytes using a
python opensource app (qcsuper <https://github.com/P1sec/QCSuper>) with a
little code manipulation. Here is a sample diag bytes:

21 00 00 0A 08 01 01 00 00 50 1C 00 04 00 03 03 FF FF 00 FF 11 90 02 00 00
10 00 00 00 EF 1F AA 4C 0B 1E 03 00 00 11 90 02 00 00 00 00 08 01 02 63 ...
02 00 B2 00 4F 00 C0 *7E* 01 00 D2 00 FD 00 C0 8E 00 00 C5 00 C5 01 C0 7E
01 00 BA 00 ... 00 00 00 00 14 *7E* 01 00 50 81 01 00 40 7D 01 00 2C ... 8D
00 00 48 8C 00 00 *7E* 00 00 00 7D 00 00 00 78 00 00

QCSuper can also run Wireshark automatically to dissect RRC Signaling
messages.

I had an experience with Qualcomm Snapdragon mobile phone and after
receiving the bytes I could dissect them using a specific structure. Some
of the patterns of this structures were indicated in a python-c++
opensource app (mobile-insight
<https://github.com/mobile-insight/mobileinsight-core>) e.g. the frames in
the diag bytes starts with *98 00* and timestamp and frame type with a
specific size follow it. Also *7E* is indicated the end of the frame.

Now, I want to know is there a similar structure in this modem diag outputs
to allow for dissecting? Can you offer me a suitable document or app like
mobile-insight?

I saw a project in Osmocom as osmo-qcdiag.
<https://github.com/osmocom/libosmocore> Can I use that to get this
structure?

I hope you help me...

Thank you very much


-- 
*When there is much light, The shadow is deep...*
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