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Bug #4754

Malformed Packets in Sniff Output

Added by connectednow about 1 month ago. Updated 26 days ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
09/16/2020
Due date:
% Done:

0%

Spec Reference:

Description

Hello,

We have an Ubuntu 20.04 LTS machine that we have set up along with a SIMtrace2 tool updated with the latest firmware.

Once we start a trace, we can capture the trace in Wireshark as well as in the terminal, but in both cases, after a few hundred packets, the data reports as malformed.

Our SIM application requests modem status every 28 seconds, and so there is a good pattern to follow in the trace. The SIM application itself is behaving correctly, and counting these status commands as it should, but the output is just no good. Perhaps the board is running out of memory?

Here is the output from the terminal around when the problem starts:
TPDU: 80 f2 00 00 00 6c 2f
TPDU: 80 f2 00 00 2f 62 2d 82 02 78 21 83 02 7f f0 84 10 a0 00 00 00 87 10 02 ff 34 ff 07 89 31 2e 30 ff 8a 01 05 8b 03 2f 06 1e c6 09 90 01 40 83 01 01 83 01 81 90 00
TPDU: 80 f2 00 00 00 6c 2f
TPDU: 80 f2 00 00 2f 62 2d 82 02 78 21 83 02 7f f0 84 10 a0 00 00 00 87 10 02 ff 34 ff 07 89 31 2e 30 ff 8a 01 05 8b 03 2f 06 1e c6 09 90 01 40 83 01 01 83 01 81 90 00
TPDU: 80 f2 00 00 00 6c 2f
TPDU: 80 f2 00 00 2f 62 2d 82 02 78 21 83 02 7f f0 84 10 a0 00 00 00 87 10 02 ff 34 ff 07 89 31 2e 30 ff 8a 01 05 8b 03 2f 06 1e c6 09 90 01 40 83 01 01 83 01 81 90 00
Card state change: reset de-asserted
Card state change: reset de-asserted
ATR (malformed): 80
ATR (malformed): 6c
ATR (malformed): f2
ATR (malformed): 07
ATR (malformed): 80
ATR (malformed): 00
ATR (malformed): 80
ATR (malformed): 03
ATR (malformed): 91
ATR (malformed): 00
ATR (malformed): 62
ATR (malformed): 80
ATR (malformed): 01
ATR (malformed): 91
ATR (malformed): 80
ATR (malformed): 38
ATR (malformed): 00
ATR (malformed): 80
ATR (malformed): 01
ATR (malformed): 90
ATR (malformed): 80
ATR (malformed): 0e
ATR (malformed): 91
ATR (malformed): 80
ATR (malformed): 80
ATR (malformed): 03
ATR (malformed): 95
ATR (malformed): 45
ATR (malformed): 91
ATR (malformed): 00
ATR (malformed): 31
ATR (checksum error): 30 f3 f3 f3 53 53 63 73 f3 73 f3 9d
TPDU (malformed): 9d
TPDU (malformed): 9d
TPDU (malformed): 9d
TPDU (malformed): 9d e3 63 f3 f3
TPDU (malformed): f3 f3 73 f3 f3
TPDU (malformed): b3 f3 73 f3 73
TPDU (malformed): 33 f3 73 d3 f3
PPS (checksum error): ff fe d7 ff ff 0f
TPDU (malformed): d7 7f 3f 7f 3d bf bf be 7e 3f 7f ff 13 7f 00 76 37 fe b7 ff ff 37 b7 f4 77 7f 3f 7f 3d 7f bf bf 7e 7b 93 9f d7 3f 3f ff 7f 7f f6 ff fe d7 ff ff 0f d7 7f 3f 7f 3d 7f bf bf be 7e 3f 7f ff 13 7f 00 76
TPDU (malformed): fe b7 ff ff b9 f4 f9 7f 3f 7f 3d 7f bf bf 7e 7b 93 55 97 3f 3f ff f5 4a cd 1a c4 b4 08 cd 01 25 51 79 84 0e 1b 57 ea 2b ac 8e 48 22 67 17 97 3e fc 57 e3 45 40 cb 6b fa b1 be a8 d5 7a 61 64 81 7f 38 af 48 fc d3 d1 3b 27 63 34 19 49 e9 26 7b 74 de ef 8b 1f 8a 09 08 0f 10 59 e7 d5 73 2b c6 e2 9a be cd 76 c2 17 f6 ff fe d7 ff ff 0f d7 7f 3f 7f 3d 7f bf bf be 7e 3f 7f ff 13 7f 00 f6 ff fe bc ff ff f7 bc 94 8f 67 7f 6f bf bf be 7e e3 bf 7e ff 13 7f 9f 76 8f fe b7 ff ff 8f b7 f4 cf 7f 3f 7f bd ff bf bf 7e 7b 13 7f 9f f6 ff fe d7 ff ff 17 d7 7f 3f 7f bd ff bf bf be 7e 3f
PPS (checksum error): ff 93 9f d7
TPDU (malformed): 3f 3f ff 7f 7f

Wireshark shows the same thing at the time. (attached)

I dont have anything setup to take from the debug 2.5mm jack, but I will look into that urgently.

Screenshot from 2020-09-15 17-50-04.png View Screenshot from 2020-09-15 17-50-04.png 82.6 KB Screenshot where problem occurs in wireshark connectednow, 09/16/2020 12:51 AM
malformed packets 20200915.pcapng malformed packets 20200915.pcapng 28 KB Wireshark trace from time connectednow, 09/16/2020 12:54 AM
4279

Related issues

Related to SIMtrace 2 - Bug #4335: Unexpected/malformed data from SIM applet causes simtrace2-sniff to stop until simtrace2 board is resetNew12/17/2019

History

#1 Updated by mschramm 29 days ago

  • Related to Bug #4335: Unexpected/malformed data from SIM applet causes simtrace2-sniff to stop until simtrace2 board is reset added

#2 Updated by mschramm 29 days ago

is it a duplicate of #4335 ?

#3 Updated by connectednow 26 days ago

mschramm wrote:

is it a duplicate of #4335 ?

Thanks for the reply.

I dont think so, I am running the latest firmware version, 0.7.0.63-39070 and although I did not see explicit confirmation, I believe #4335 was solved in a previous firmware version.

I ordered a debug cable last week so as soon as that arrives I will provide some output from that.

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