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Add support for ADF_USIM/EF_EHPLMN

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If the EF.EHPLMN exists, it contains the "Equivalent Home PLMN List".
The odd part of that list is that it is not just a list of additional
PLMN identities, but if the first digits of the IMSI are *not* listed
in EF.EHPLMN, then the MCC/MNC of the IMSI prefix is suddently no
longer considered the home network, but the subscriber is roaming.

See TS 23.122: "If the HPLMN code derived from the IMSI is not present
in the EHPLMN list, then it shall be treated as a Visited PLMN for PLMN
selection purposes."

Change-Id: I22d96ab4a424ec5bc1fb02f5e80165c646a748d3
This commit is contained in:
Harald Welte
2020-06-03 15:19:40 +02:00
committed by laforge
parent 3c0bd7a41e
commit ca6739458e
5 changed files with 83 additions and 4 deletions
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7
pySim-read.py
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@@ -241,6 +241,13 @@ if __name__ == '__main__':
# Check whether we have th AID of USIM, if so select it by its AID
# EF.UST - File Id in ADF USIM : 6f38
if '9000' == card.select_adf_by_aid():
# EF.EHPLMN
if card.file_exists(EF_USIM_ADF_map['EHPLMN']):
(res, sw) = card.read_ehplmn()
if sw == '9000':
print("EHPLMN:\n%s" % (res))
else:
print("EHPLMN: Can't read, response code = %s" % (sw,))
# EF.UST
(res, sw) = card.read_binary(EF_USIM_ADF_map['UST'])
if sw == '9000':