Commit Graph

6 Commits

Author SHA1 Message Date
Harald Welte 93c34aac89 apdu/ts_102_221: SELECT: allow select of SELF
While in the pySim-shell, it's useful to filter the currently selected
file from the choice of available files for select, this doesn't apply
for the tracing case: It's perfectly valid for the UE to SELECT the
file that's already selected right now.  The operation basically
becomes equivalent to a STATUS.

Change-Id: I1a20fb3ba70426333ac34448c6cb782c51363965
2022-07-25 14:25:11 +02:00
Harald Welte dcc689d9c4 apdu/ts_102_221: SELECT: allow select of parent/ancestor DFs
We need to pass the 'PARENT' flag to get_selectables() to be able
to track SELECT on any of the parent/ancestor DF FID.

Change-Id: Ia7ac627d5edccb97160c90688d720d887fad6ec7
2022-07-25 14:25:11 +02:00
Harald Welte 8e9c844130 apdu/ts_102_221: Fix SELECT of 3f00
In order to be able to explicitly select the MF via 3f00,
we need to pass the 'MF' to get_selectables(), so the record
is included in the list of selectable files from the current
working directory.

Change-Id: I27085896142fe547a6e93e01e63e59bbc65c8b8a
2022-07-24 11:56:35 +02:00
Harald Welte 498361f3b5 apdu/ts_102_221: Implement SELECT case "df_ef_or_mf_by_file_id"
This was [sadly] simply missing from the implementation so far.

Change-Id: I7bbd13ce29f5adc1ca3ca01bffabbe02dd17db20
2022-07-24 11:56:35 +02:00
Harald Welte c61fbf4daa pySim-trace: Support SELECT with empty response body
If the modem/UE doesn't ask for the FCP to be returned, a SELECT
can exit with 9000 and no response body.  Don't crash in that case.

Change-Id: I66788717bec921bc54575e60f3f81adc80584dbc
2022-07-24 09:46:11 +02:00
Harald Welte 21caf32e3d Introduce APDU/TPDU trace decoder
This introduces a new pySim.apdu module hierarchy, which contains
classes that represent TPDU/APDUs as exchanged between
SIM/UICC/USIM/ISIM card and UE.

It contains instruction level decoders for SELECT, READ BINARY and
friends, and then uses the pySim.filesystem.Runtime{Lchan,State} classes
to keep track of the currently selected EF/DF/ADF for each logical
channel, and uses the file-specific decoder classes of pySim to decode
the actual file content that is being read or written.

This provides a much more meaningful decode of protocol traces than
wireshark will ever be able to give us.

Furthermore, there's the new pySim.apdu_source set of classes which
provides "input plugins" for obtaining APDU traces in a variety of
formats.  So far, GSMTAP UDP live capture and pyshark based RSPRO
live and pcap file reading are imlpemented.

Change-Id: I862d93163d495a294364168f7818641e47b18c0a
Closes: OS#5126
2022-07-23 12:18:57 +02:00