def test_construct_exception_attr_len(self):
# invalid med value
self.assertRaises(UpdateMessageError, MED.construct, 4294967296)
try:
MED.construct(value=4294967296)
except UpdateMessageError as e:
self.assertEqual(e.sub_error, ERR_MSG_UPDATE_ATTR_LEN)
def construct_attributes(attr_dict, asn4=False):
"""
construts BGP Update attirubte.
:param attr_dict: bgp attribute dictionary
:param asn4: support 4 bytes asn or not
"""
attr_raw_hex = b''
for type_code, value in attr_dict.items():
if type_code == bgp_cons.BGPTYPE_ORIGIN:
origin_hex = Origin.construct(value=value)
attr_raw_hex += origin_hex
elif type_code == bgp_cons.BGPTYPE_AS_PATH:
aspath_hex = ASPath.construct(value=value, asn4=asn4)
attr_raw_hex += aspath_hex
elif type_code == bgp_cons.BGPTYPE_NEXT_HOP:
nexthop_hex = NextHop.construct(value=value)
attr_raw_hex += nexthop_hex
elif type_code == bgp_cons.BGPTYPE_MULTI_EXIT_DISC:
med_hex = MED.construct(value=value)
attr_raw_hex += med_hex
elif type_code == bgp_cons.BGPTYPE_LOCAL_PREF:
localpre_hex = LocalPreference.construct(value=value)
attr_raw_hex += localpre_hex
elif type_code == bgp_cons.BGPTYPE_ATOMIC_AGGREGATE:
atomicaggregate_hex = AtomicAggregate.construct(value=value)
attr_raw_hex += atomicaggregate_hex
elif type_code == bgp_cons.BGPTYPE_AGGREGATOR:
aggregator_hex = Aggregator.construct(value=value, asn4=asn4)
attr_raw_hex += aggregator_hex
elif type_code == bgp_cons.BGPTYPE_COMMUNITIES:
community_hex = Community.construct(value=value)
attr_raw_hex += community_hex
elif type_code == bgp_cons.BGPTYPE_ORIGINATOR_ID:
originatorid_hex = OriginatorID.construct(value=value)
attr_raw_hex += originatorid_hex
elif type_code == bgp_cons.BGPTYPE_CLUSTER_LIST:
clusterlist_hex = ClusterList.construct(value=value)
attr_raw_hex += clusterlist_hex
return attr_raw_hex
def construct_attributes(attr_dict, asn4=False):
"""
construts BGP Update attirubte.
:param attr_dict: bgp attribute dictionary
:param asn4: support 4 bytes asn or not
"""
attr_raw_hex = b''
for type_code, value in attr_dict.items():
if type_code == bgp_cons.BGPTYPE_ORIGIN:
origin_hex = Origin.construct(value=value)
attr_raw_hex += origin_hex
elif type_code == bgp_cons.BGPTYPE_AS_PATH:
aspath_hex = ASPath.construct(value=value, asn4=asn4)
attr_raw_hex += aspath_hex
elif type_code == bgp_cons.BGPTYPE_NEXT_HOP:
nexthop_hex = NextHop.construct(value=value)
attr_raw_hex += nexthop_hex
elif type_code == bgp_cons.BGPTYPE_MULTI_EXIT_DISC:
med_hex = MED.construct(value=value)
attr_raw_hex += med_hex
elif type_code == bgp_cons.BGPTYPE_LOCAL_PREF:
localpre_hex = LocalPreference.construct(value=value)
attr_raw_hex += localpre_hex
elif type_code == bgp_cons.BGPTYPE_ATOMIC_AGGREGATE:
atomicaggregate_hex = AtomicAggregate.construct(value=value)
attr_raw_hex += atomicaggregate_hex
elif type_code == bgp_cons.BGPTYPE_AGGREGATOR:
aggregator_hex = Aggregator.construct(value=value, asn4=asn4)
attr_raw_hex += aggregator_hex
elif type_code == bgp_cons.BGPTYPE_COMMUNITIES:
community_hex = Community.construct(value=value)
attr_raw_hex += community_hex
elif type_code == bgp_cons.BGPTYPE_ORIGINATOR_ID:
originatorid_hex = OriginatorID.construct(value=value)
attr_raw_hex += originatorid_hex
elif type_code == bgp_cons.BGPTYPE_CLUSTER_LIST:
clusterlist_hex = ClusterList.construct(value=value)
attr_raw_hex += clusterlist_hex
return attr_raw_hex
def test_construct(self):
med = MED.construct(value=100)
self.assertEqual(med, b'\x80\x04\x04\x00\x00\x00d')
def construct_attributes(attr_dict, asn4=False):
"""
construts BGP Update attirubte.
:param attr_dict: bgp attribute dictionary
:param asn4: support 4 bytes asn or not
"""
attr_raw_hex = b''
for type_code, value in attr_dict.items():
if type_code == bgp_cons.BGPTYPE_ORIGIN:
origin_hex = Origin.construct(value=value)
attr_raw_hex += origin_hex
elif type_code == bgp_cons.BGPTYPE_AS_PATH:
aspath_hex = ASPath.construct(value=value, asn4=asn4)
attr_raw_hex += aspath_hex
elif type_code == bgp_cons.BGPTYPE_NEXT_HOP:
nexthop_hex = NextHop.construct(value=value)
attr_raw_hex += nexthop_hex
elif type_code == bgp_cons.BGPTYPE_MULTI_EXIT_DISC:
med_hex = MED.construct(value=value)
attr_raw_hex += med_hex
elif type_code == bgp_cons.BGPTYPE_LOCAL_PREF:
localpre_hex = LocalPreference.construct(value=value)
attr_raw_hex += localpre_hex
elif type_code == bgp_cons.BGPTYPE_ATOMIC_AGGREGATE:
atomicaggregate_hex = AtomicAggregate.construct(value=value)
attr_raw_hex += atomicaggregate_hex
elif type_code == bgp_cons.BGPTYPE_AGGREGATOR:
aggregator_hex = Aggregator.construct(value=value, asn4=asn4)
attr_raw_hex += aggregator_hex
elif type_code == bgp_cons.BGPTYPE_COMMUNITIES:
community_hex = Community.construct(value=value)
attr_raw_hex += community_hex
elif type_code == bgp_cons.BGPTYPE_ORIGINATOR_ID:
originatorid_hex = OriginatorID.construct(value=value)
attr_raw_hex += originatorid_hex
elif type_code == bgp_cons.BGPTYPE_CLUSTER_LIST:
clusterlist_hex = ClusterList.construct(value=value)
attr_raw_hex += clusterlist_hex
elif type_code == bgp_cons.BGPTYPE_MP_REACH_NLRI:
mpreach_hex = MpReachNLRI().construct(value=value)
attr_raw_hex += mpreach_hex
elif type_code == bgp_cons.BGPTYPE_MP_UNREACH_NLRI:
mpunreach_hex = MpUnReachNLRI.construct(value=value)
attr_raw_hex += mpunreach_hex
elif type_code == bgp_cons.BGPTYPE_EXTENDED_COMMUNITY:
community_ext_hex = ExtCommunity.construct(value=value)
attr_raw_hex += community_ext_hex
elif type_code == bgp_cons.BGPTYPE_PMSI_TUNNEL:
evpn_overlay = EVPN.signal_evpn_overlay(attr_dict)
attr_raw_hex += PMSITunnel.construct(value=value,
evpn_overlay=evpn_overlay)
elif type_code == bgp_cons.BGPTYPE_TUNNEL_ENCAPS_ATTR:
tunnelencap_hex = TunnelEncaps.construct(value=value)
attr_raw_hex += tunnelencap_hex
elif type_code == bgp_cons.BGPTYPE_LARGE_COMMUNITY:
large_community_ext_hex = LargeCommunity.construct(value=value)
attr_raw_hex += large_community_ext_hex
return attr_raw_hex
