From 8e0fccdbf361e045f0f13c63a0f79cf52c134f6f Mon Sep 17 00:00:00 2001
From: Supreeth Herle <herlesupreeth@gmail.com>
Date: Mon, 23 Mar 2020 12:10:56 +0100
Subject: sysmoISIM-SJA2: Add support for programming Home ePDG Identifier

Example:

./pySim-prog.py -p 0 -x 001 -y 01 -s 8988211900000000004 -i 001011234567895 \
	-k 8baf473f2f8fd09487cccbd7097c6862 --op 11111111111111111111111111111111 \
	-o 8E27B6AF0E692E750F32667A3B14605D -a 85524953 -n isim.test \
        --msisdn 0598765432100 --epdgid epdg.epc.mnc001.mcc001.pub.3gppnetwork.org

Note:

1. For Operator Identifier based ePDG FQDN must be in the format

epdg.epc.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org

2. For Tracking/Location Area Identity based ePDG FQDN must be in format

lac<LAC>.epdg.epc.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org

and

tac-lb<TAC-low-byte>.tac-hb<TAC-high-byte>.tac.epdg.epc.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org

and

3. For 5GS Tracking Area Identity based ePDG FQDN using a 3 octet TAC

tac-lb<TAC-low-byte>.tac-mb<TAC-middle-byte>.tac-hb<TAC-high-byte>.5gstac. epdg.epc.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org

Change-Id: Ia00bfea36c50b6a38a5387d2f8147f25c81b1de4
---
 pySim-prog.py  | 4 ++++
 pySim/cards.py | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/pySim-prog.py b/pySim-prog.py
index 601f980..8547573 100755
--- a/pySim-prog.py
+++ b/pySim-prog.py
@@ -147,6 +147,9 @@ def parse_options():
 	parser.add_option("--acc", dest="acc",
 			help="Set ACC bits (Access Control Code). not all card types are supported",
 		)
+	parser.add_option("--epdgid", dest="epdgid",
+			help="Set Home Evolved Packet Data Gateway (ePDG) Identifier. (Only FQDN format supported)",
+		)
 	parser.add_option("--read-imsi", dest="read_imsi", action="store_true",
 			help="Read the IMSI from the CARD", default=False
 		)
@@ -442,6 +445,7 @@ def gen_parameters(opts):
 		'acc'	: acc,
 		'pin_adm' : pin_adm,
 		'msisdn' : opts.msisdn,
+		'epdgid' : opts.epdgid,
 	}
 
 
diff --git a/pySim/cards.py b/pySim/cards.py
index eeeae82..8835cc9 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -1160,6 +1160,15 @@ class SysmoISIMSJA2(UsimCard):
 					sw = self.update_ehplmn(p['mcc'], p['mnc'])
 					if sw != '9000':
 						print("Programming EHPLMN failed with code %s"%sw)
+
+			# update EF.ePDGId in ADF.USIM
+			if self.file_exists(EF_USIM_ADF_map['ePDGId']):
+				if p.get('epdgid'):
+					sw = self._scc.update_binary(
+						EF_USIM_ADF_map['ePDGId'], enc_epdgid(p['epdgid']))
+					if sw != '9000':
+						print("Programming ePDGId failed with code %s"%sw)
+
 		return
 
 
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