def test_ipv6_unicast_with_locallink_nexthop_construct(self):
data_hoped = {
'afi_safi': (2, 1),
'linklocal_nexthop': 'fe80::c002:bff:fe7e:0',
'nexthop': '2001:db8::2',
'nlri': ['::2001:db8:2:2/64', '::2001:db8:2:1/64', '::2001:db8:2:0/64']}
self.assertEqual(data_hoped, MpReachNLRI.parse(MpReachNLRI.construct(data_hoped)[3:]))
def test_ipv6_unicast_with_linklocal_nexthop(self):
data_bin = b"\x00\x02\x01\x20\x20\x01\x0d\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
b"\x02\xfe\x80\x00\x00\x00\x00\x00\x00\xc0\x02\x0b\xff\xfe\x7e\x00\x00\x00\x40" \
b"\x20\x01\x0d\xb8\x00\x02\x00\x02\x40\x20\x01\x0d\xb8\x00\x02\x00\x01\x40\x20" \
b"\x01\x0d\xb8\x00\x02\x00\x00"
data_hoped = {
'afi_safi': (2, 1),
'linklocal_nexthop': 'fe80::c002:bff:fe7e:0',
'nexthop': '2001:db8::2',
'nlri': ['::2001:db8:2:2/64', '::2001:db8:2:1/64', '::2001:db8:2:0/64']}
self.assertEqual(data_hoped, MpReachNLRI.parse(data_bin))
def test_ipv6_unicast(self):
data_bin = b"\x00\x02\x01\x10\x20\x01\x32\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
b"\x01\x00\x80\x20\x01\x32\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01" \
b"\x40\x20\x01\x32\x32\x00\x01\x00\x00\x7f\x20\x01\x48\x37\x16\x32\x00\x00\x00" \
b"\x00\x00\x00\x00\x00\x00\x02"
data_hoped = {
'afi_safi': (2, 1),
'nexthop': '2001:3232::1',
'nlri': ['2001:3232::1/128', '::2001:3232:1:0/64', '2001:4837:1632::2/127']}
self.assertEqual(data_hoped, MpReachNLRI.parse(data_bin))
def test_ipv4_flowspec_construct(self):
data_bin = b'\x80\x0e\x10\x00\x01\x85\x00\x00\x0a\x01\x18\xc0\x55\x02\x02\x18\xc0\x55\x01'
data_dict = {'afi_safi': (1, 133), 'nexthop': '', 'nlri': [{1: '192.85.2.0/24'}, {2: '192.85.1.0/24'}]}
self.assertEqual(data_bin, MpReachNLRI.construct(data_dict))
def test_ipv6_unicast_construct(self):
data_parsed = {
'afi_safi': (2, 1),
'nexthop': '2001:3232::1',
'nlri': ['2001:3232::1/128', '::2001:3232:1:0/64', '2001:4837:1632::2/127']}
self.assertEqual(data_parsed, MpReachNLRI.parse(MpReachNLRI.construct(data_parsed)[3:]))
def parse_attributes(data, asn4=False):
"""
Parses an RFC4271 encoded blob of BGP attributes into a list
:param data:
:param asn4: support 4 bytes asn or not
:return:
"""
attributes = {}
postfix = data
while len(postfix) > 0:
try:
flags, type_code = struct.unpack('!BB', postfix[:2])
if flags & AttributeFlag.EXTENDED_LENGTH:
attr_len = struct.unpack('!H', postfix[2:4])[0]
attr_value = postfix[4:4 + attr_len]
postfix = postfix[4 + attr_len:] # Next attribute
else: # standard 1-octet length
if isinstance(postfix[2], int):
attr_len = postfix[2]
else:
attr_len = ord(postfix[2])
attr_value = postfix[3:3 + attr_len]
postfix = postfix[3 + attr_len:] # Next attribute
except Exception as e:
LOG.error(e)
error_str = traceback.format_exc()
LOG.debug(error_str)
raise excep.UpdateMessageError(
sub_error=bgp_cons.ERR_MSG_UPDATE_MALFORMED_ATTR_LIST,
data='')
if type_code == bgp_cons.BGPTYPE_ORIGIN:
decode_value = Origin.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_AS_PATH:
decode_value = ASPath.parse(value=attr_value, asn4=asn4)
elif type_code == bgp_cons.BGPTYPE_NEXT_HOP:
decode_value = NextHop.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_MULTI_EXIT_DISC:
decode_value = MED.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_LOCAL_PREF:
decode_value = LocalPreference.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_ATOMIC_AGGREGATE:
decode_value = AtomicAggregate.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_AGGREGATOR:
decode_value = Aggregator.parse(value=attr_value, asn4=asn4)
elif type_code == bgp_cons.BGPTYPE_COMMUNITIES:
decode_value = Community.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_ORIGINATOR_ID:
decode_value = OriginatorID.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_CLUSTER_LIST:
decode_value = ClusterList.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_NEW_AS_PATH:
decode_value = ASPath.parse(value=attr_value, asn4=True)
elif type_code == bgp_cons.BGPTYPE_NEW_AGGREGATOR:
decode_value = Aggregator.parse(value=attr_value, asn4=True)
elif type_code == bgp_cons.BGPTYPE_MP_REACH_NLRI:
decode_value = MpReachNLRI.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_MP_UNREACH_NLRI:
decode_value = MpUnReachNLRI.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_EXTENDED_COMMUNITY:
decode_value = ExtCommunity.parse(value=attr_value)
elif type_code == bgp_cons.BGPTYPE_PMSI_TUNNEL:
decode_value = PMSITunnel.parse(value=attr_value)
else:
decode_value = repr(attr_value)
attributes[type_code] = decode_value
return attributes
def test_ipv4_mpsl_vpn_construct_nexthop(self):
nexthop = {'rd': '0:0', 'str': '2.2.2.2'}
nexthop_bin = b'\x00\x00\x00\x00\x00\x00\x00\x00\x02\x02\x02\x02'
self.assertEqual(nexthop_bin,
MpReachNLRI.construct_mpls_vpn_nexthop(nexthop))
def test_ipv6_mpls_vpn_construct_nexthop(self):
nexthop = {'rd': '0:0', 'str': '::ffff:172.16.4.12'}
nexthop_bin = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' \
b'\x00\x00\x00\x00\x00\x00\xff\xff\xac\x10\x04\x0c'
self.assertEqual(nexthop_bin,
MpReachNLRI.construct_mpls_vpn_nexthop(nexthop))
