pySim-read.py: Enable parsing of EF.ePDGSelection in USIM

As per TS 31.102, this EF can found under ADF.USIM at File Id 6ff4.
Also, if service n°106 and service n°107 are available, this file shall be present.

Change-Id: I98916e6f5c9791aff63c18a3b16bdfb8ae9b2d36

pySim-read.py

@@ -36,6 +36,7 @@ from pySim.commands import SimCardCommands
 from pySim.cards import card_detect, Card
 from pySim.utils import h2b, swap_nibbles, rpad, dec_imsi, dec_iccid, dec_msisdn
 from pySim.utils import format_xplmn_w_act, dec_spn, dec_st, init_reader, dec_epdgid
+from pySim.utils import h2s, format_ePDGSelection
 
 def parse_options():
 
@@ -282,6 +283,17 @@ if __name__ == '__main__':
 		except Exception as e:
 			print("ePDGId: Can't read file -- " + str(e))
 
+		#EF.ePDGSelection - ePDG Selection Information
+		try:
+			if card.file_exists(EF_USIM_ADF_map['ePDGSelection']):
+				(res, sw) = card.read_ePDGSelection()
+				if sw == '9000':
+					print("ePDGSelection:\n%s" % (res,))
+				else:
+					print("ePDGSelection: Can't read, response code = %s" % (sw,))
+		except Exception as e:
+			print("ePDGSelection: Can't read file -- " + str(e))
+
 	# Check whether we have th AID of ISIM, if so select it by its AID
 	# EF.IST - File Id in ADF ISIM : 6f07
 	if '9000' == card.select_adf_by_aid(adf="isim"):

pySim/cards.py

@@ -277,6 +277,13 @@ class UsimCard(Card):
 						EF_USIM_ADF_map['ePDGId'], epdgid_tlv)
 		return sw
 
+	def read_ePDGSelection(self):
+		(res, sw) = self._scc.read_binary(EF_USIM_ADF_map['ePDGSelection'])
+		if sw == '9000':
+			return (format_ePDGSelection(res), sw)
+		else:
+			return (None, sw)
+
 	def read_ust(self):
 		(res, sw) = self._scc.read_binary(EF_USIM_ADF_map['UST'])
 		if sw == '9000':

pysim-testdata/sysmoISIM-SJA2.ok

@@ -165,6 +165,12 @@ USIM Service Table: beff9f9de73e0408400170730000002e00000000
 ePDGId:
 	Not available
 
+ePDGSelection:
+	ffffffffffff # unused
+	ffffffffffff # unused
+	ffffffffffff # unused
+	ffffffffffff # unused
+
 ISIM Service Table: 190200
 	Service 1 - P-CSCF address
 	Service 4 - GBA-based Local Key Establishment Mechanism