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eNAS.py
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1179 lines (954 loc) · 51.7 KB
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import struct
import socket
from binascii import hexlify, unhexlify
#BASE FUNCTION to be called from external
#only used for downlink messages, so no SERVICE REQUEST message.
#input: nas message
def nas_decode(nas):
nas_list = []
if nas == None:
return nas_list
protocol_discriminator = nas[0] % 16
nas_list.append(("protocol discriminator", protocol_discriminator))
if protocol_discriminator == 7: # EMM
security_header = nas[0] // 16
nas_list.append(("security header", security_header))
if security_header == 0: # plain nas
nas_list.append(("message type", nas[1]))
if len(nas)>2:
emm_list = nas_decode_emm(nas[1], nas[2:])
nas_list += emm_list
#emm#
else:
nas_list.append(("message authentication code",nas[1:5]))
nas_list.append(("sequence_number",nas[5]))
nas_list.append(("nas message encrypted", nas[6:]))
elif protocol_discriminator == 2: # ESM
eps_bearer_identity = nas[0] // 16
nas_list.append(("eps bearer identity", eps_bearer_identity))
nas_list.append(("procedure transaction identity", nas[1]))
nas_list.append(("message type", nas[2]))
if len(nas)>3:
esm_list = nas_decode_esm(nas[2], nas[3:])
nas_list += esm_list
#esm#
return nas_list
#------------------------------------#
# #
# E M M - P r o c e d u r e s #
# #
#------------------------------------#
#input: message_type and next bytes of nas with ies
def nas_decode_emm(message_type, ies):
ies_list = []
if message_type == 66: # attach accept
ies_list = nas_decode_emm_attach_accept(ies)
elif message_type == 68: #attach reject
ies_list = nas_decode_emm_attach_reject(ies)
elif message_type == 69: #detach request
ies_list = nas_decode_emm_detach_request(ies)
elif message_type == 70: #detach accept
ies_list = nas_decode_emm_detach_accept(ies)
elif message_type == 73: #tracking area update accept
ies_list = nas_decode_emm_tracking_area_update_accept(ies)
elif message_type == 75: #tracking area update reject
ies_list = nas_decode_emm_tracking_area_update_reject(ies)
elif message_type == 78: #service reject
ies_list = nas_decode_emm_service_reject(ies)
elif message_type == 79: #service accept
ies_list = nas_decode_emm_service_accept(ies)
elif message_type == 80: #guti reallocation coomand
ies_list = nas_decode_emm_guti_reallocation_command(ies)
elif message_type == 82: #authentication request
ies_list = nas_decode_emm_authentication_request(ies)
elif message_type == 84: #authentication reject
ies_list = nas_decode_emm_authentication_reject(ies)
elif message_type == 85: #identity request
ies_list = nas_decode_emm_identity_request(ies)
elif message_type == 93: #security mode command
ies_list = nas_decode_emm_security_mode_command(ies)
elif message_type == 96: #emm status
ies_list = nas_decode_emm_emm_status(ies)
elif message_type == 97: #emm information
ies_list = nas_decode_emm_emm_information(ies)
elif message_type == 98: #downlink nas transport
ies_list = nas_decode_emm_downlink_nas_transport(ies)
elif message_type == 100: #cs service notification
ies_list = nas_decode_emm_cs_service_notification(ies)
elif message_type == 104: #downlink generic nas transport
ies_list = nas_decode_emm_downlink_generic_nas_transport(ies)
return ies_list
def nas_decode_emm_attach_accept(ies):
ies_list = []
ies_list.append(("eps attach result", ies[0] % 16))
ies_list.append(("t3412 value", ies[1]))
tai_list_length = ies[2]
ies_list.append(("tai list", ies[3:3+tai_list_length]))
pointer = 3 + tai_list_length
esm_message_container_length = ies[pointer]*256+ies[pointer+1]
esm_message_container = ies[pointer+2:pointer+2+esm_message_container_length]
ies_list.append(("esm message container",nas_decode(esm_message_container)))
pointer = pointer+2+esm_message_container_length
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x50: # guti
guti_length = ies[pointer + 1]
guti = ies[pointer+2:pointer+2+guti_length]
ies_list.append(("guti", guti))
pointer = pointer+2+guti_length
elif ies[pointer] == 0x13: #location area identification
ies_list.append(("location area identification", ies[pointer+1:pointer+6]))
pointer = pointer+6
elif ies[pointer] == 0x23: #ms identity
ms_identity_length = ies[pointer + 1]
ms_identity = ies[pointer+2:pointer+2+ms_identity_length]
ies_list.append(("ms identity", ms_identity))
pointer = pointer+2+ms_identity_length
elif ies[pointer] == 0x53: #emm cause
ies_list.append(("emm cause", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x17: #t3402 value
ies_list.append(("t3402 value", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x59: #t3423 value
ies_list.append(("t3423 value", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x4A: #equivalent plmns
equivalent_plmns_length = ies[pointer + 1]
equivalent_plmns = ies[pointer+2:pointer+2+equivalent_plmns_length]
ies_list.append(("equivalent plmns", equivalent_plmns))
pointer = pointer+2+equivalent_plmns_length
elif ies[pointer] == 0x34: #emergency number list
emergency_number_list_length = ies[pointer + 1]
emergency_number_list = ies[pointer+2:pointer+2+emergency_number_list_length]
ies_list.append(("emergency number list", emergency_number_list))
pointer = pointer+2+emergency_number_list_length
elif ies[pointer] == 0x64: #eps network feature support
eps_network_feature_support_length = ies[pointer + 1]
eps_network_feature_support = ies[pointer+2:pointer+2+eps_network_feature_support_length]
ies_list.append(("eps network feature support", eps_network_feature_support))
pointer = pointer+2+eps_network_feature_support_length
elif ies[pointer] == 0x5E: #t3412 extended value
t3412_extended_value_length = ies[pointer + 1]
t3412_extended_value = ies[pointer+2:pointer+2+t3412_extended_value_length]
ies_list.append(("t3412 extended value", t3412_extended_value))
pointer = pointer+2+t3412_extended_value_length
elif ies[pointer] // 16 == 0xF: # additional update result F-
ies_list.append(("additional update result", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x6A: #t3324_value
t3324_value_length = ies[pointer + 1]
t3324_value = ies[pointer+2:pointer+2+t3324_value_length]
ies_list.append(("t3324 value", t3324_value))
pointer = pointer+2+t3324_value_length
elif ies[pointer] == 0x6E: #extended_drx_parameters
extended_drx_parameters_length = ies[pointer + 1]
extended_drx_parameters = ies[pointer+2:pointer+2+extended_drx_parameters_length]
ies_list.append(("extended drx parameters", extended_drx_parameters))
pointer = pointer+2+extended_drx_parameters_length
elif ies[pointer] == 0x65: #dcn_id
dcn_id_length = ies[pointer + 1]
dcn_id = ies[pointer+2:pointer+2+dcn_id_length]
ies_list.append(("dcn-id", dcn_id))
pointer = pointer+2+dcn_id_length
elif ies[pointer] // 16 == 0xE: # sms_service_status
ies_list.append(("sms service status", ies[pointer]))
pointer = pointer+1
elif ies[pointer] // 16 == 0xD: # non_3gpp_nw_provided_policies
ies_list.append(("non 3gpp nw provided policies", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x6B: #t3448_value
t3448_value_length = ies[pointer + 1]
t3448_value = ies[pointer+2:pointer+2+t3448_value_length]
ies_list.append(("t3448 value", t3448_value))
pointer = pointer+2+t3448_value_length
elif ies[pointer] // 16 == 0xC: # network policy
ies_list.append(("network policy", ies[pointer]))
pointer = pointer+1
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_attach_reject(ies):
ies_list = []
ies_list.append(("emm cause", ies[0]))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x78: # esm message container
esm_message_container_length = ies[pointer+1]*256+ies[pointer+2]
esm_message_container = ies[pointer+3:pointer+3+esm_message_container_length]
ies_list.append(("esm message container",nas_decode(esm_message_container)))
pointer = pointer+3+esm_message_container_length
elif ies[pointer] == 0x5F: #t3346 value
t3346_value_length = ies[pointer + 1]
t3346_value = ies[pointer+2:pointer+2+t3346_value_length]
ies_list.append(("t3346 value", t3346_value))
pointer = pointer+2+t3346_value_length
elif ies[pointer] == 0x16: #t3402 value
t3402_value_length = ies[pointer + 1]
t3402_value = ies[pointer+2:pointer+2+t3402_value_length]
ies_list.append(("t3402 value", t3402_value))
pointer = pointer+2+t3402_value_length
elif ies[pointer] // 16 == 0xA: # extended emm cause
ies_list.append(("extended emm cause", ies[pointer]))
pointer = pointer+1
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_detach_request(ies):
ies_list = []
ies_list.append(("detach type", ies[0] % 16))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x53: #emm cause
ies_list.append(("emm cause", ies[pointer+1:pointer+1]))
pointer = pointer+2
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_detach_accept(ies):
pass #done no IEI
def nas_decode_emm_tracking_area_update_accept(ies):
ies_list = []
ies_list.append(("eps update result", ies[0] % 16))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x5a: # t3412_value
ies_list.append(("t3412 value", ies[pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x50: # guti
guti_length = ies[pointer + 1]
guti = ies[pointer+2:pointer+2+guti_length]
ies_list.append(("guti", guti))
pointer = pointer+2+guti_length
elif ies[pointer] == 0x54: #tai list
tai_list_length = ies[pointer + 1]
tai_list = ies[pointer+2:pointer+2+tai_list_length]
ies_list.append(("tai list", tai_list))
pointer = pointer+2+tai_list_length
elif ies[pointer] == 0x57: #eps_bearer_context_status
eps_bearer_context_status_length = ies[pointer + 1]
eps_bearer_context_status = ies[pointer+2:pointer+2+eps_bearer_context_status_length]
ies_list.append(("tai list", eps_bearer_context_status))
pointer = pointer+2+eps_bearer_context_status_length
elif ies[pointer] == 0x13: #location area identification
ies_list.append(("location area identification", ies[pointer+1:pointer+6]))
pointer = pointer+6
elif ies[pointer] == 0x23: #ms identity
ms_identity_length = ies[pointer + 1]
ms_identity = ies[pointer+2:pointer+2+ms_identity_length]
ies_list.append(("ms identity", ms_identity))
pointer = pointer+2+ms_identity_length
elif ies[pointer] == 0x53: #emm cause
ies_list.append(("emm cause", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x17: #t3402 value
ies_list.append(("t3402 value", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x59: #t3423 value
ies_list.append(("t3423 value", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x4A: #equivalent plmns
equivalent_plmns_length = ies[pointer + 1]
equivalent_plmns = ies[pointer+2:pointer+2+equivalent_plmns_length]
ies_list.append(("equivalent plmns", equivalent_plmns))
pointer = pointer+2+equivalent_plmns_length
elif ies[pointer] == 0x34: #emergency number list
emergency_number_list_length = ies[pointer + 1]
emergency_number_list = ies[pointer+2:pointer+2+emergency_number_list_length]
ies_list.append(("emergency number list", emergency_number_list))
pointer = pointer+2+emergency_number_list_length
elif ies[pointer] == 0x64: #eps network feature support
eps_network_feature_support_length = ies[pointer + 1]
eps_network_feature_support = ies[pointer+2:pointer+2+eps_network_feature_support_length]
ies_list.append(("eps network feature support", eps_network_feature_support))
pointer = pointer+2+eps_network_feature_support_length
elif ies[pointer] == 0x5E: #t3412 extended value
t3412_extended_value_length = ies[pointer + 1]
t3412_extended_value = ies[pointer+2:pointer+2+t3412_extended_value_length]
ies_list.append(("t3412 extended value", t3412_extended_value))
pointer = pointer+2+t3412_extended_value_length
elif ies[pointer] // 16 == 0xF: # additional update result F-
ies_list.append(("additional update result", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x6A: #t3324_value
t3324_value_length = ies[pointer + 1]
t3324_value = ies[pointer+2:pointer+2+t3324_value_length]
ies_list.append(("t3324 value", t3324_value))
pointer = pointer+2+t3324_value_length
elif ies[pointer] == 0x6E: #extended_drx_parameters
extended_drx_parameters_length = ies[pointer + 1]
extended_drx_parameters = ies[pointer+2:pointer+2+extended_drx_parameters_length]
ies_list.append(("extended drx parameters", extended_drx_parameters))
pointer = pointer+2+extended_drx_parameters_length
elif ies[pointer] == 0x65: #dcn_id
dcn_id_length = ies[pointer + 1]
dcn_id = ies[pointer+2:pointer+2+dcn_id_length]
ies_list.append(("dcn-id", dcn_id))
pointer = pointer+2+dcn_id_length
elif ies[pointer] == 0x68: #header_compression_configuration_status
header_compression_configuration_status_length = ies[pointer + 1]
header_compression_configuration_status = ies[pointer+2:pointer+2+header_compression_configuration_status_length]
ies_list.append(("header compression configuration status", header_compression_configuration_status))
pointer = pointer+2+header_compression_configuration_status_length
elif ies[pointer] // 16 == 0xE: # sms_service_status
ies_list.append(("sms service status", ies[pointer]))
pointer = pointer+1
elif ies[pointer] // 16 == 0xD: # non_3gpp_nw_provided_policies
ies_list.append(("non 3gpp nw provided policies", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x6B: #t3448_value
t3448_value_length = ies[pointer + 1]
t3448_value = ies[pointer+2:pointer+2+t3448_value_length]
ies_list.append(("t3448 value", t3448_value))
pointer = pointer+2+t3448_value_length
elif ies[pointer] // 16 == 0xC: # network policy
ies_list.append(("network policy", ies[pointer]))
pointer = pointer+1
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_tracking_area_update_reject(ies):
ies_list = []
ies_list.append(("emm cause", ies[0]))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x5F: #t3346 value
t3346_value_length = ies[pointer + 1]
t3346_value = ies[pointer+2:pointer+2+t3346_value_length]
ies_list.append(("t3346 value", t3346_value))
pointer = pointer+2+t3346_value_length
elif ies[pointer] // 16 == 0xA: # extended emm cause
ies_list.append(("extended emm cause", ies[pointer]))
pointer = pointer+1
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_service_reject(ies):
ies_list = []
ies_list.append(("emm cause", ies[0]))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x5B : # t3442
ies_list.append(("t3442 value", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x5F: #t3346 value
t3346_value_length = ies[pointer + 1]
t3346_value = ies[pointer+2:pointer+2+t3346_value_length]
ies_list.append(("t3346 value", t3346_value))
pointer = pointer+2+t3346_value_length
elif ies[pointer] == 0x6B: #t3448 value
t3448_value_length = ies[pointer + 1]
t3448_value = ies[pointer+2:pointer+2+t3448_value_length]
ies_list.append(("t3448 value", t3448_value))
pointer = pointer+2+t3448_value_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_service_accept(ies):
ies_list = []
pointer = 0
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x5F: #t3346 value
eps_bearer_context_status_length = ies[pointer + 1]
eps_bearer_context_status = ies[pointer+2:pointer+2+eps_bearer_context_status_length]
ies_list.append(("eps bearer context status", eps_bearer_context_status))
pointer = pointer+2+eps_bearer_context_status_length
elif ies[pointer] == 0x6B: #t3448 value
t3448_value_length = ies[pointer + 1]
t3448_value = ies[pointer+2:pointer+2+t3448_value_length]
ies_list.append(("t3448 value", t3448_value))
pointer = pointer+2+t3448_value_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_guti_reallocation_command(ies):
ies_list = []
ies_list.append(("guti", ies[0:0+12]))
pointer = 1+12
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x54: #tai list
tai_list_length = ies[pointer + 1]
tai_list = ies[pointer+2:pointer+2+tai_list_length]
ies_list.append(("tai list", tai_list))
pointer = pointer+2+tai_list_length
elif ies[pointer] == 0x65: #dcn_id
dcn_id_length = ies[pointer + 1]
dcn_id = ies[pointer+2:pointer+2+dcn_id_length]
ies_list.append(("dcn-id", dcn_id))
pointer = pointer+2+dcn_id_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_authentication_request(ies):
ies_list = []
ies_list.append(("nas key set identifier", ies[0] % 16))
ies_list.append(("rand", ies[1:1+16]))
pointer = 1+16
autn_length = ies[pointer]
ies_list.append(("autn", ies[pointer+1:pointer+1+autn_length]))
return ies_list
def nas_decode_emm_authentication_reject(ies):
pass #done no IEI
def nas_decode_emm_identity_request(ies):
ies_list = []
ies_list.append(("identity type", ies[0] % 16))
return ies_list
def nas_decode_emm_security_mode_command(ies):
ies_list = []
ies_list.append(("selected nas security algorithms", ies[0]))
ies_list.append(("nas key set identifier", ies[1] % 16 ))
pointer = 2
replayed_ue_security_capabilities_length = ies[pointer]
ies_list.append(("replayed ue security capabilities", ies[pointer+1:pointer+1+replayed_ue_security_capabilities_length]))
pointer = pointer+1+replayed_ue_security_capabilities_length
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x55: #replayed nonce ue
ies_list.append(("replayed nonce ue", ies[pointer+1:pointer+5]))
pointer = pointer+5
elif ies[pointer] == 0x56: # nonce mme
ies_list.append(("nonce mme", ies[pointer+1:pointer+5]))
pointer = pointer+5
elif ies[pointer] // 16 == 0xc: # imeisv request C-
ies_list.append(("imeisv request", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x4f: # hash_mme
hash_mme_length = ies[pointer + 1]
hash_mme = ies[pointer+2:pointer+2+hash_mme_length]
ies_list.append(("hash mme", hash_mme))
pointer = pointer+2+hash_mme_length
elif ies[pointer] == 0x6f: # replayed_ue_additional_security_capability
replayed_ue_additional_security_capability_length = ies[pointer + 1]
replayed_ue_additional_security_capability = ies[pointer+2:pointer+2+replayed_ue_additional_security_capability_length]
ies_list.append(("replayed ue additional security capability", replayed_ue_additional_security_capability))
pointer = pointer+2+replayed_ue_additional_security_capability_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_emm_status(ies):
ies_list = []
ies_list.append(("emm cause", ies[0]))
return ies_list
def nas_decode_emm_emm_information(ies):
ies_list = []
pointer = 0
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x43: # full name for network
full_name_for_network_length = ies[pointer + 1]
full_name_for_network = ies[pointer+2:pointer+2+full_name_for_network_length]
ies_list.append(("full name for network", full_name_for_network))
pointer = pointer+2+full_name_for_network_length
elif ies[pointer] == 0x45: # short name for network
short_name_for_network_length = ies[pointer + 1]
short_name_for_network = ies[pointer+2:pointer+2+short_name_for_network_length]
ies_list.append(("short name for network", short_name_for_network))
pointer = pointer+2+short_name_for_network_length
elif ies[pointer] == 0x49: # network daylight saving time
network_daylight_saving_time_length = ies[pointer + 1]
network_daylight_saving_time = ies[pointer+2:pointer+2+network_daylight_saving_time_length]
ies_list.append(("network daylight saving time", network_daylight_saving_time))
pointer = pointer+2+network_daylight_saving_time_length
elif ies[pointer] == 0x46: # local time zone
ies_list.append(("local time zone", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x47: # universal time and local time zone
ies_list.append(("universal time and local time zone", ies[pointer+1:pointer+8]))
pointer = pointer+8
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_downlink_nas_transport(ies):
ies_list = []
pointer = 0
nas_message_container_length = ies[pointer]
nas_message_container = ies[pointer+1:pointer+1+nas_message_container_length]
ies_list.append(("nas message container",nas_message_container))
return ies_list
def nas_decode_emm_downlink_generic_nas_transport(ies):
ies_list = []
ies_list.append(("generic message container type", ies[0]))
pointer = 1
generic_message_container_length = ies[pointer]*256+ies[pointer+1]
generic_message_container = ies[pointer+2:pointer+2+generic_message_container_length]
ies_list.append(("generic message container",generic_message_container))
pointer = pointer+2+esm_message_container_length
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x65: # additional information
additional_information_length = ies[pointer + 1]
additional_information = ies[pointer+2:pointer+2+additional_information_length]
ies_list.append(("additional information", additional_information))
pointer = pointer+2+additional_information_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_emm_cs_service_notification(ies):
ies_list = []
ies_list.append(("paging identity", ies[0]))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x60: # CLI
cli_length = ies[pointer + 1]
cli = ies[pointer+2:pointer+2+cli_length]
ies_list.append(("cli", cli))
pointer = pointer+2+cli_length
elif ies[pointer] == 0x61: #ss code
ies_list.append(("ss code", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x62: # lcs indicator
ies_list.append(("lcs indicator", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x63: # lcs client identity
lcs_client_identity_length = ies[pointer + 1]
lcs_client_identity = ies[pointer+2:pointer+2+lcs_client_identity_length]
ies_list.append(("lcs client identity", lcs_client_identity))
pointer = pointer+2+lcs_client_identity_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
#------------------------------------#
# #
# E S M - P r o c e d u r e s #
# #
#------------------------------------#
#inputs: message_type and next bytes of nas with ies
def nas_decode_esm(message_type, ies):
ies_list = []
if message_type == 193: # activate default eps bearer context request
ies_list = nas_decode_esm_activate_default_eps_bearer_context_request(ies)
elif message_type == 197: # Activate dedicated EPS bearer context request
ies_list = nas_decoded_esm_activate_dedicated_eps_bearer_context_request(ies)
elif message_type == 201: # Modify EPS bearer context request
ies_list = nas_decode_esm_modify_eps_bearer_context_request(ies)
elif message_type == 205: # deactivate eps bearer context request
ies_list = nas_decode_esm_deactivate_eps_bearer_context_request(ies)
elif message_type == 209: # pdn connectivity reject
ies_list = nas_decode_esm_pdn_connectivity_reject(ies)
elif message_type == 211: # pdn disconnect reject
ies_list = nas_decode_esm_pdn_disconnect_reject(ies)
elif message_type == 217: # esm information request
ies_list = nas_decode_esm_esm_information_request(ies)
elif message_type == 235: # esm data transport
ies_list = nas_decode_esm_esm_data_transport(ies)
return ies_list
def nas_decode_esm_activate_default_eps_bearer_context_request(ies):
ies_list = []
eps_qos_length = ies[0]
ies_list.append(("eps qos", ies[1:1+eps_qos_length]))
pointer = 1 + eps_qos_length
access_point_name_length = ies[pointer]
ies_list.append(("access point name", ies[pointer+1:pointer+1+access_point_name_length]))
pointer += 1 + access_point_name_length
pdn_address_length = ies[pointer]
ies_list.append(("pdn address", ies[pointer+1:pointer+1+pdn_address_length]))
pointer += 1 + pdn_address_length
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x5D: #transaction identifier
transaction_identifier_length = ies[pointer + 1]
transaction_identifier = ies[pointer+2:pointer+2+transaction_identifier_length]
ies_list.append(("transaction identifier", transaction_identifier))
pointer = pointer+2+transaction_identifier_length
elif ies[pointer] == 0x30: #negotiated qos
negotiated_qos_length = ies[pointer + 1]
negotiated_qos = ies[pointer+2:pointer+2+negotiated_qos_length]
ies_list.append(("negotiated qos", negotiated_qos))
pointer = pointer+2+negotiated_qos_length
elif ies[pointer] == 0x34: #packet flow identifier
packet_flow_identifier_length = ies[pointer + 1]
packet_flow_identifier = ies[pointer+2:pointer+2+packet_flow_identifier_length]
ies_list.append(("packet flow identifier", packet_flow_identifier))
pointer = pointer+2+packet_flow_identifier_length
elif ies[pointer] == 0x5E: #apn-ambr
apn_ambr_length = ies[pointer + 1]
apn_ambr = ies[pointer+2:pointer+2+apn_ambr_length]
ies_list.append(("apn-ambr", apn_ambr))
pointer = pointer+2+apn_ambr_length
elif ies[pointer] == 0x27: #protocol configuration options
protocol_configuration_options_length = ies[pointer + 1]
protocol_configuration_options = ies[pointer+2:pointer+2+protocol_configuration_options_length]
ies_list.append(("protocol configuration options", protocol_configuration_options))
pointer = pointer+2+protocol_configuration_options_length
elif ies[pointer] == 0x32: #negotiated llc sapi
ies_list.append(("negotiated llc sapi", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x58: #esm cause
ies_list.append(("esm cause", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] // 16 == 0x8: # radio priority 8-
ies_list.append(("radio priority", ies[pointer]))
pointer = pointer+1
elif ies[pointer] // 16 == 0xB: # connectivity type B-
ies_list.append(("connectivity type", ies[pointer]))
pointer = pointer+1
elif ies[pointer] // 16 == 0xC: # wlan offload indication C-
ies_list.append(("wlan offload indication", ies[pointer]))
pointer = pointer+1
elif ies[pointer] // 16 == 0x9: # control plane only indication 9-
ies_list.append(("control plane only indication", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x7B: # extended_protocol_configuration_options
extended_protocol_configuration_options_length = ies[pointer+1]*256+ies[pointer+2]
extended_protocol_configuration_options = ies[pointer+3:pointer+3+extended_protocol_configuration_options_length]
ies_list.append(("extended protocol configuration options",nas_decode(extended_protocol_configuration_options)))
pointer = pointer+3+extended_protocol_configuration_options_length
elif ies[pointer] == 0x6E: #serving_plmn_rate_control
serving_plmn_rate_control_length = ies[pointer + 1]
serving_plmn_rate_control = ies[pointer+2:pointer+2+serving_plmn_rate_control_length]
ies_list.append(("serving plmn rate control", serving_plmn_rate_control))
pointer = pointer+2+serving_plmn_rate_control_length
elif ies[pointer] == 0x5F: #extended apn-ambr
extended_apn_ambr_length = ies[pointer + 1]
extended_apn_ambr = ies[pointer+2:pointer+2+extended_apn_ambr_length]
ies_list.append(("extended apn-ambr", extended_apn_ambr))
pointer = pointer+2+extended_apn_ambr_length
elif ies[pointer] == 0x5C: #extended_eps_qos
extended_eps_qos_length = ies[pointer + 1]
extended_eps_qos = ies[pointer+2:pointer+2+extended_eps_qos_length]
ies_list.append(("extended eps qos", extended_eps_qos))
pointer = pointer+2+extended_eps_qos_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_esm_modify_eps_bearer_context_request(ies):
ies_list = []
pointer = 0
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x5B: #new eps qos
new_eps_qos_length = ies[pointer + 1]
new_eps_qos = ies[pointer+2:pointer+2+new_eps_qos_length]
ies_list.append(("new eps qos", new_eps_qos))
pointer = pointer+2+new_eps_qos_length
elif ies[pointer] == 0x36: #tft
tft_length = ies[pointer + 1]
tft = ies[pointer+2:pointer+2+tft_length]
ies_list.append(("tft", tft))
pointer = pointer+2+tft_length
elif ies[pointer] == 0x30: #new qos
new_qos_length = ies[pointer + 1]
new_qos = ies[pointer+2:pointer+2+new_qos_length]
ies_list.append(("new qos", new_qos))
pointer = pointer+2+new_qos_length
elif ies[pointer] == 0x32: #negotiated llc sapi
ies_list.append(("negotiated llc sapi", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] // 16 == 0x8: # radio priority 8-
ies_list.append(("radio priority", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x34: #packet flow identifier
packet_flow_identifier_length = ies[pointer + 1]
packet_flow_identifier = ies[pointer+2:pointer+2+packet_flow_identifier_length]
ies_list.append(("packet flow identifier", packet_flow_identifier))
pointer = pointer+2+packet_flow_identifier_length
elif ies[pointer] == 0x5E: #apn-ambr
apn_ambr_length = ies[pointer + 1]
apn_ambr = ies[pointer+2:pointer+2+apn_ambr_length]
ies_list.append(("apn-ambr", apn_ambr))
pointer = pointer+2+apn_ambr_length
elif ies[pointer] == 0x27: #protocol configuration options
protocol_configuration_options_length = ies[pointer + 1]
protocol_configuration_options = ies[pointer+2:pointer+2+protocol_configuration_options_length]
ies_list.append(("protocol configuration options", protocol_configuration_options))
pointer = pointer+2+protocol_configuration_options_length
elif ies[pointer] // 16 == 0xC: # wlan offload indication C-
ies_list.append(("wlan offload indication", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x33: #nbifom container
nbifom_container_length = ies[pointer + 1]
nbifom_container = ies[pointer+2:pointer+2+nbifom_container_length]
ies_list.append(("nbifom container", nbifom_container))
pointer = pointer+2+nbifom_container_length
elif ies[pointer] == 0x66: #header compression configuration
header_compression_configuration_length = ies[pointer + 1]
header_compression_configuration = ies[pointer+2:pointer+2+header_compression_configuration_length]
ies_list.append(("header compression configuration", header_compression_configuration))
pointer = pointer+2+header_compression_configuration_length
elif ies[pointer] == 0x7B: # extended_protocol_configuration_options
extended_protocol_configuration_options_length = ies[pointer+1]*256+ies[pointer+2]
extended_protocol_configuration_options = ies[pointer+3:pointer+3+extended_protocol_configuration_options_length]
ies_list.append(("extended protocol configuration options",nas_decode(extended_protocol_configuration_options)))
pointer = pointer+3+extended_protocol_configuration_options_length
elif ies[pointer] == 0x5F: #extended apn-ambr
extended_apn_ambr_length = ies[pointer + 1]
extended_apn_ambr = ies[pointer+2:pointer+2+extended_apn_ambr_length]
ies_list.append(("extended apn-ambr", extended_apn_ambr))
pointer = pointer+2+extended_apn_ambr_length
elif ies[pointer] == 0x5C: #extended_eps_qos
extended_eps_qos_length = ies[pointer + 1]
extended_eps_qos = ies[pointer+2:pointer+2+extended_eps_qos_length]
ies_list.append(("extended eps qos", extended_eps_qos))
pointer = pointer+2+extended_eps_qos_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decoded_esm_activate_dedicated_eps_bearer_context_request(ies):
ies_list = []
ies_list.append(("linked eps bearer identity", ies[0] % 16))
eps_qos_length = ies[1]
ies_list.append(("eps qos", ies[2:2+eps_qos_length]))
pointer = 2 + eps_qos_length
tft_length = ies[pointer]
ies_list.append(("tft", ies[pointer+1:pointer+1+tft_length]))
pointer += 1 + tft_length
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x5D: #transaction identifier
transaction_identifier_length = ies[pointer + 1]
transaction_identifier = ies[pointer+2:pointer+2+transaction_identifier_length]
ies_list.append(("transaction identifier", transaction_identifier))
pointer = pointer+2+transaction_identifier_length
elif ies[pointer] == 0x30: #negotiated qos
negotiated_qos_length = ies[pointer + 1]
negotiated_qos = ies[pointer+2:pointer+2+negotiated_qos_length]
ies_list.append(("negotiated qos", negotiated_qos))
pointer = pointer+2+negotiated_qos_length
elif ies[pointer] == 0x34: #packet flow identifier
packet_flow_identifier_length = ies[pointer + 1]
packet_flow_identifier = ies[pointer+2:pointer+2+packet_flow_identifier_length]
ies_list.append(("packet flow identifier", packet_flow_identifier))
pointer = pointer+2+packet_flow_identifier_length
elif ies[pointer] == 0x33: #nbifom container
nbifom_container_length = ies[pointer + 1]
nbifom_container = ies[pointer+2:pointer+2+nbifom_container_length]
ies_list.append(("nbifom container", nbifom_container))
pointer = pointer+2+nbifom_container_length
elif ies[pointer] == 0x27: #protocol configuration options
protocol_configuration_options_length = ies[pointer + 1]
protocol_configuration_options = ies[pointer+2:pointer+2+protocol_configuration_options_length]
ies_list.append(("protocol configuration options", protocol_configuration_options))
pointer = pointer+2+protocol_configuration_options_length
elif ies[pointer] == 0x32: #negotiated llc sapi
ies_list.append(("negotiated llc sapi", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] == 0x58: #esm cause
ies_list.append(("esm cause", ies[pointer+1:pointer+1]))
pointer = pointer+2
elif ies[pointer] // 16 == 0x8: # radio priority 8-
ies_list.append(("radio priority", ies[pointer]))
pointer = pointer+1
elif ies[pointer] // 16 == 0xC: # wlan offload indication C-
ies_list.append(("wlan offload indication", ies[pointer]))
pointer = pointer+1
elif ies[pointer] == 0x7B: # extended_protocol_configuration_options
extended_protocol_configuration_options_length = ies[pointer+1]*256+ies[pointer+2]
extended_protocol_configuration_options = ies[pointer+3:pointer+3+extended_protocol_configuration_options_length]
ies_list.append(("extended protocol configuration options",nas_decode(extended_protocol_configuration_options)))
pointer = pointer+3+extended_protocol_configuration_options_length
elif ies[pointer] == 0x5C: #extended_eps_qos
extended_eps_qos_length = ies[pointer + 1]
extended_eps_qos = ies[pointer+2:pointer+2+extended_eps_qos_length]
ies_list.append(("extended eps qos", extended_eps_qos))
pointer = pointer+2+extended_eps_qos_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_esm_deactivate_eps_bearer_context_request(ies):
ies_list = []
ies_list.append(("esm cause", ies[0]))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x27: #protocol configuration options
protocol_configuration_options_length = ies[pointer + 1]
protocol_configuration_options = ies[pointer+2:pointer+2+protocol_configuration_options_length]
ies_list.append(("protocol configuration options", protocol_configuration_options))
pointer = pointer+2+protocol_configuration_options_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_esm_pdn_connectivity_reject(ies):
ies_list = []
ies_list.append(("esm cause", ies[0]))
pointer = 1
exit_while = False
while len(ies)>pointer and exit_while == False:
if ies[pointer] == 0x27: #protocol configuration options
protocol_configuration_options_length = ies[pointer + 1]
protocol_configuration_options = ies[pointer+2:pointer+2+protocol_configuration_options_length]
ies_list.append(("protocol configuration options", protocol_configuration_options))
pointer = pointer+2+protocol_configuration_options_length
elif ies[pointer] == 0x37: #t3396 value
t3396_value_length = ies[pointer + 1]
t3396_value = ies[pointer+2:pointer+2+t3396_value_length]
ies_list.append(("t3396 value", t3396_value))
pointer = pointer+2+t3396_value_length
######## LAST ONE TO EXIT WHILE LOOP ###
else: # didn't find more IEs
exit_while = True
return ies_list
def nas_decode_esm_pdn_disconnect_reject(ies):
ies_list = []
ies_list.append(("esm cause", ies[0]))