def initialize(self, transaction=None, option=None, **kwargs):
"""
IA TA addresses of client
"""
for payload in option:
transaction.iaid = payload[0:8]
transaction.iat1 = int(payload[8:16], 16)
transaction.iat2 = int(payload[16:24], 16)
# addresses given by client if any
for a in range(len(payload[32:]) // 44):
address = payload[32:][(a * 56):(a * 56) + 32]
# in case an address is asked for twice by one host ignore the twin
# sometimes address seems to be EMPTY???
if address and colonify_ip6(address) and address not in transaction.addresses:
transaction.addresses.append(address)
transaction.ia_options.append(CONST.OPTION.IA_TA)
def build(self, transaction=None, **kwargs):
# dummy empty defaults
response_string_part = ''
options_answer_part = None
# check if MAC of LLIP is really known
if transaction.client_llip in collected_macs or cfg.IGNORE_MAC:
# collect client information
if transaction.client is None:
transaction.client = Client(transaction)
# Only if prefixes are provided
if 'prefixes' in cfg.CLASSES[transaction.client.client_class].ADVERTISE:
# check if only a short NoPrefixAvail answer or none at all is to be returned
if not transaction.answer == 'normal':
if transaction.answer == 'noprefix':
# Option 13 Status Code Option - statuscode is 6: 'No Prefix available'
response_string_part = self.convert_to_string(CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_PREFIX_AVAILABLE:04x}')
# clean client prefixes which not be deployed anyway
transaction.client.prefixes[:] = []
# options in answer to be logged
options_answer_part = self.number
else:
# if client could not be built because of database problems send
# status message back
if transaction.client:
# embed option 26 into option 25 - several if necessary
ia_prefixes = ''
try:
for prefix in transaction.client.prefixes:
ipv6_prefix = hexlify(inet_pton(AF_INET6, colonify_ip6(prefix.PREFIX))).decode()
if prefix.VALID:
preferred_lifetime = f'{int(prefix.PREFERRED_LIFETIME):08x}'
valid_lifetime = f'{int(prefix.VALID_LIFETIME):08x}'
else:
preferred_lifetime = f'{0:08x}'
valid_lifetime = f'{0:08x}'
length = f'{int(prefix.LENGTH):02x}'
ia_prefixes += self.convert_to_string(CONST.OPTION.IAPREFIX,
preferred_lifetime +
valid_lifetime +
length +
ipv6_prefix)
if transaction.client.client_class != '':
t1 = f'{int(cfg.CLASSES[transaction.client.client_class].T1):08x}'
t2 = f'{int(cfg.CLASSES[transaction.client.client_class].T2):08x}'
else:
t1 = f'{int(cfg.T1):08x}'
t2 = f'{int(cfg.T2):08x}'
# even if there are no prefixes server has to deliver an empty PD
response_string_part = self.convert_to_string(self.number,
transaction.iaid +
t1 +
t2 +
ia_prefixes)
# if no prefixes available a NoPrefixAvail status code has to be sent
if ia_prefixes == '':
# REBIND not possible
if transaction.last_message_received_type == CONST.MESSAGE.REBIND:
# Option 13 Status Code Option - statuscode is 3: 'NoBinding'
response_string_part += self.convert_to_string(CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_BINDING:04x}')
else:
# Option 13 Status Code Option - statuscode is 6: 'No Prefix available'
response_string_part += self.convert_to_string( # break because line too long
CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_PREFIX_AVAILABLE:04x}')
# options in answer to be logged
options_answer_part = self.number
except Exception as err:
print(err)
# Option 13 Status Code Option - statuscode is 6: 'No Prefix available'
response_string_part = self.convert_to_string(CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_PREFIX_AVAILABLE:04x}')
# options in answer to be logged
options_answer_part = self.number
else:
# Option 13 Status Code Option - statuscode is 6: 'No Prefix available'
response_string_part = self.convert_to_string(CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_PREFIX_AVAILABLE:04x}')
# options in answer to be logged
options_answer_part = self.number
return response_string_part, options_answer_part
def build(self, transaction=None, **kwargs):
# dummy empty defaults
response_string_part = ''
options_answer_part = None
# check if MAC of LLIP is really known
if transaction.client_llip in collected_macs or cfg.IGNORE_MAC:
# collect client information
if transaction.client is None:
transaction.client = Client(transaction)
if 'addresses' in cfg.CLASSES[transaction.client.client_class].ADVERTISE and \
CONST.OPTION.IA_NA in transaction.ia_options:
# check if only a short NoAddrAvail answer or none at all is to be returned
if not transaction.answer == 'normal':
if transaction.answer == 'noaddress':
# Option 13 Status Code Option - statuscode is 2: 'No Addresses available'
response_string_part = self.convert_to_string(CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_ADDRESSES_AVAILABLE:04x}')
# clean client addresses which not be deployed anyway
transaction.client.addresses[:] = []
# options in answer to be logged
options_answer_part = CONST.OPTION.STATUS_CODE
else:
# if client could not be built because of database problems send
# status message back
if transaction.client:
# embed option 5 into option 3 - several if necessary
ia_addresses = ''
try:
for address in transaction.client.addresses:
if address.IA_TYPE == 'na':
ipv6_address = hexlify(inet_pton(AF_INET6, colonify_ip6(address.ADDRESS))).decode()
# if a transaction consists of too many requests from client -
# - might be caused by going wild Windows clients -
# reset all addresses with lifetime 0
# lets start with maximal transaction count of 10
if transaction.counter < 10:
preferred_lifetime = f'{int(address.PREFERRED_LIFETIME):08x}'
valid_lifetime = f'{int(address.VALID_LIFETIME):08x}'
else:
preferred_lifetime = '00000000'
valid_lifetime = '00000000'
ia_addresses += self.convert_to_string(CONST.OPTION.IAADDR,
ipv6_address +
preferred_lifetime +
valid_lifetime)
if ia_addresses != '':
#
# todo: default clients sometimes seem to have class ''
#
if transaction.client.client_class != '':
t1 = f'{int(cfg.CLASSES[transaction.client.client_class].T1):08x}'
t2 = f'{int(cfg.CLASSES[transaction.client.client_class].T2):08x}'
else:
t1 = f'{int(cfg.T1):08x}'
t2 = f'{int(cfg.T2):08x}'
response_string_part = self.convert_to_string(CONST.OPTION.IA_NA,
transaction.iaid +
t1 +
t2 +
ia_addresses)
# options in answer to be logged
options_answer_part = CONST.OPTION.IA_NA
except:
# Option 13 Status Code Option - statuscode is 2: 'No Addresses available'
response_string_part = self.convert_to_string(CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_ADDRESSES_AVAILABLE:04x}')
# options in answer to be logged
options_answer_part = CONST.OPTION.STATUS_CODE
else:
# Option 13 Status Code Option - statuscode is 2: 'No Addresses available'
response_string_part = self.convert_to_string(CONST.OPTION.STATUS_CODE,
f'{CONST.STATUS.NO_ADDRESSES_AVAILABLE:04x}')
# options in answer to be logged
options_answer_part = CONST.OPTION.STATUS_CODE
return response_string_part, options_answer_part