def decode_asn1(self, session_ctx, rx_data):
if 0 == len(rx_data):
print("Error, received 0 bytes!")
return
pdu = ULP.ULP.ULP_PDU
pdu.from_uper(rx_data)
print(pdu.to_asn1())
# print payload
(msgtype, message) = get_val_at(pdu, ["message"])
if message.__contains__("posPayLoad"):
(payload_type, payload) = message["posPayLoad"]
if payload_type == "rrlpPayload":
self.rrlp_codec.decode_asn1(payload)
(msgtype, message) = get_val_at(pdu, ["message"])
if msgtype == "msSUPLRESPONSE":
return self.decode_supl_response(session_ctx, pdu)
elif msgtype == "msSUPLPOS":
# TBD
return True
print("Error, unexpected message type: %s" % msgtype)
return False
def decode_ue_rad_cap(buf):
UERadCap = RRCLTE.EUTRA_InterNodeDefinitions.UERadioAccessCapabilityInformation
try:
UERadCap.from_uper(buf)
except:
return None
uecapinfo = {}
try:
# ue-RadioAccessCapabilityInfo (OCTET STRING) contains UECapabilityInformation (SEQUENCE)
radcapinfo = get_val_at(
UERadCap,
('criticalExtensions', 'c1',
'ueRadioAccessCapabilityInformation-r8',
'ue-RadioAccessCapabilityInfo', 'UECapabilityInformation',
'criticalExtensions', 'c1', 'ueCapabilityInformation-r8'))
except:
UERadCap._val, uecapinfo
# decode each ueCapabilityRAT-Container
for caprat in radcapinfo['ue-CapabilityRAT-ContainerList']:
rattype = caprat[
'rat-Type'] # eutra, utra, geran-cs, geran-ps, cdma2000-1XRTT
if rattype == 'eutra':
UEEUTRACap = RRCLTE.EUTRA_RRC_Definitions.UE_EUTRA_Capability
try:
UEEUTRACap.from_uper(caprat['ueCapabilityRAT-Container'])
except:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = UEEUTRACap._val
elif rattype == 'utra':
UEUTRACap = RRC3G.PDU_definitions.InterRATHandoverInfo
try:
UEUTRACap.from_uper(caprat['ueCapabilityRAT-Container'])
except:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = UEUTRACap._val
elif rattype == 'geran-cs':
m2, m3 = NAS.MSCm2(), NAS.Classmark_3_Value_part.clone()
# MSCm2 || MSCm3
try:
m2.from_bytes(caprat['ueCapabilityRAT-Container'])
m3.from_bytes(
caprat['ueCapabilityRAT-Container'][m2.get_len():])
except:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = (m2, m3)
elif rattype == 'geran-ps':
mrc = NAS.MS_RA_capability_value_part.clone()
try:
mrc.from_bytes(caprat['ueCapabilityRAT-Container'])
except:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = mrc
else:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
return UERadCap._val, uecapinfo
def decode_ue_rad_cap(buf):
UERadCap = RRCLTE.EUTRA_InterNodeDefinitions.UERadioAccessCapabilityInformation
try:
UERadCap.from_uper(buf)
except Exception:
return None
uecapinfo = {}
try:
# ue-RadioAccessCapabilityInfo (OCTET STRING) contains UECapabilityInformation (SEQUENCE)
radcapinfo = get_val_at(
UERadCap,
('criticalExtensions', 'c1',
'ueRadioAccessCapabilityInformation-r8',
'ue-RadioAccessCapabilityInfo', 'UECapabilityInformation',
'criticalExtensions', 'c1', 'ueCapabilityInformation-r8'))
except Exception:
return UERadCap._val, uecapinfo
# decode each ueCapabilityRAT-Container
for caprat in radcapinfo['ue-CapabilityRAT-ContainerList']:
rattype = caprat[
'rat-Type'] # eutra, utra, geran-cs, geran-ps, cdma2000-1XRTT
if rattype == 'eutra':
UEEUTRACap = RRCLTE.EUTRA_RRC_Definitions.UE_EUTRA_Capability
try:
UEEUTRACap.from_uper(caprat['ueCapabilityRAT-Container'])
except Exception:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = UEEUTRACap._val
elif rattype == 'utra':
UEUTRACap = RRC3G.PDU_definitions.InterRATHandoverInfo
try:
UEUTRACap.from_uper(caprat['ueCapabilityRAT-Container'])
except Exception:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = UEUTRACap._val
elif rattype == 'geran-cs':
m2, m3 = NAS.MSCm2(), NAS.classmark_3_value_part.clone()
# MSCm2 || MSCm3
buf = caprat['ueCapabilityRAT-Container']
if buf[0:1] != b'\x33':
uecapinfo[rattype] = buf
else:
m2_len = ord(buf[1:2])
buf_m2 = buf[2:2 + m2_len]
buf_m3 = buf[2 + m2_len:]
try:
m2.from_bytes(buf_m2)
m3.from_bytes(buf_m3)
except Exception:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = (m2, m3)
elif rattype == 'geran-ps':
mrc = NAS.ms_ra_capability_value_part.clone()
try:
mrc.from_bytes(caprat['ueCapabilityRAT-Container'])
except Exception:
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
else:
uecapinfo[rattype] = mrc
else:
# TODO: could be cdma2000_1XRTT
uecapinfo[rattype] = caprat['ueCapabilityRAT-Container']
return UERadCap._val, uecapinfo
def decode_supl_response(self, session_ctx, pdu):
session_ctx.slp_session_id = get_val_at(
pdu, ["sessionID", "slpSessionID", "sessionID"])
return True
