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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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6
pysim-testdata/sysmoISIM-SJA2.ok
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@@ -100,6 +100,12 @@ SIM Service Table: ff33ffff3f003f0f300cf0c3f00000
Service 58 - Extension 8
Service 59 - MMS User Connectivity Parameters
EHPLMN:
00f110 # MCC: 001 MNC: 001
ffffff # unused
ffffff # unused
ffffff # unused
USIM Service Table: beff9f9de73e0408400170730000002e00000000
Service 2 - Fixed Dialling Numbers (FDN)
Service 3 - Extension 2