commit 4ebeebffca518a7cc36af8af716d0b0ed9407f0d
author Harald Welte <laforge@osmocom.org> Fri Feb 25 09:47:51 2022 +0100
committer Harald Welte <laforge@osmocom.org> Fri Feb 25 09:48:20 2022 +0100
tree 1b98a3970be0fbce295614dd250b4131cf4ea530
parent 5e9bd93bbd4213763ff1c7bbc340c1e0fcf55ed8

ts_102_221: Fix decoding the 'num_of_rec' field

It is a 8bit integer, not a 16bit integer.  See TS 102 221 11.1.1.4.3

Change-Id: I3e258547dad21a248650cfbc02e0576268d3b3fd

pySim/ts_102_221.py

diff --git a/pySim/ts_102_221.py b/pySim/ts_102_221.py
index 708b50b..713d169 100644
--- a/pySim/ts_102_221.py
+++ b/pySim/ts_102_221.py
@@ -103,7 +103,7 @@
                            'structure'/Enum(BitsInteger(3), no_info_given=0, transparent=1, linear_fixed=2, cyclic=6))
                 )
     _construct = Struct('file_descriptor_byte'/FDB, Const(b'\x21'),
-                        'record_len'/COptional(Int16ub), 'num_of_rec'/COptional(Int16ub))
+                        'record_len'/COptional(Int16ub), 'num_of_rec'/COptional(Int8ub))
 
 # ETSI TS 102 221 11.1.1.4.4
 class FileIdentifier(BER_TLV_IE, tag=0x83):