def test_parse(self):
self.maxDiff = None
data_bin = b"\x00\x02\x00" \
b"\x55\x02\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x1a\x02\x00" \
b"\x00\x04\x00\x00\xff\xfe\x02\x01\x00\x04\x00\x00\x00\x00\x02\x03" \
b"\x00\x06\x00\x00\x00\x00\x00\x03\x01\x01\x00\x1a\x02\x00\x00\x04" \
b"\x00\x00\xff\xfe\x02\x01\x00\x04\x00\x00\x00\x00\x02\x03\x00\x06" \
b"\x00\x00\x00\x00\x00\x01\x01\x03\x00\x04\x01\x03\x00\x02\x01\x04" \
b"\x00\x04\x01\x03\x00\x01"
data_dict = [{
'type':
'link',
'value': [
{
'type': 'local-node',
'value': {
'as': 65534,
'bgpls-id': '0.0.0.0',
'igp-id': '0.0.0.3'
}
},
{
'type': 'remote-node',
'value': {
'as': 65534,
'bgpls-id': '0.0.0.0',
'igp-id': '0.0.0.1'
}
},
{
'type': 'link-local-ipv4',
'value': '1.3.0.2'
},
{
'type': 'link-remote-ipv4',
'value': '1.3.0.1'
},
]
}]
self.assertEqual(data_dict, BGPLS.parse(data_bin))
def test_parse(self):
self.maxDiff = None
data_bin = b"\x00\x02\x00" \
b"\x55\x02\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x1a\x02\x00" \
b"\x00\x04\x00\x00\xff\xfe\x02\x01\x00\x04\x00\x00\x00\x00\x02\x03" \
b"\x00\x06\x00\x00\x00\x00\x00\x03\x01\x01\x00\x1a\x02\x00\x00\x04" \
b"\x00\x00\xff\xfe\x02\x01\x00\x04\x00\x00\x00\x00\x02\x03\x00\x06" \
b"\x00\x00\x00\x00\x00\x01\x01\x03\x00\x04\x01\x03\x00\x02\x01\x04" \
b"\x00\x04\x01\x03\x00\x01"
data_dict = [
{
'type': 'link',
'protocol_id': 2,
'instances_id': 0,
'descriptors': [
{
'type': 'local_node',
'value': {
'as_num': 65534,
'bgpls_id': '0.0.0.0',
'igp_router_id': {'pseudonode': False, 'iso_node_id': '0000.0000.0003'}}},
{
'type': 'remote_node',
'value': {
'as_num': 65534,
'bgpls_id': '0.0.0.0',
'igp_router_id': {
'pseudonode': False,
'iso_node_id': '0000.0000.0001'
}}},
{
'type': 'link_local_ipv4',
'value': '1.3.0.2'},
{
'type': 'link_remote_ipv4',
'value': '1.3.0.1'},
]
}
]
self.assertEqual(data_dict, BGPLS.parse(data_bin))
def test_parse(self):
self.maxDiff = None
data_bin = b"\x00\x02\x00\x51\x07\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00" \
b"\x18\x02\x00\x00\x04\x00\x00\x00\xc8\x02\x01\x00\x04\x00\x00\x00" \
b"\x00\x02\x05\x00\x04\x00\x00\x00" \
b"\xc8\x01\x01\x00\x18\x02\x00\x00\x04\x00\x00\x01\x2c\x02\x01\x00" \
b"\x04\x00\x00\x00\x00\x02\x05\x00" \
b"\x04\x00\x00\x01\x2c\x01\x03\x00\x04\xc0\xa8\x04\x03\x01\x04\x00" \
b"\x04\xc0\xa8\x04\x04"
data_dict = [
{
'type': 'link',
'protocol_id': 7,
'instances_id': 0,
'descriptors': [
{
'type': 'local_node',
'value': {
'as_num': 200,
'bgpls_id': '0.0.0.0',
# 'bgp_router_id': '3.3.3.3',
'member_as_num': 200}},
{
'type': 'remote_node',
'value': {
'as_num': 300,
'bgpls_id': '0.0.0.0',
# 'bgp_router_id': '4.4.4.4',
'member_as_num': 300}},
{
'type': 'link_local_ipv4',
'value': '192.168.4.3'},
{
'type': 'link_remote_ipv4',
'value': '192.168.4.4'},
]
}
]
self.assertEqual(data_dict, BGPLS.parse(data_bin))
def parse(cls, value):
try:
afi, safi = struct.unpack('!HB', value[0:3])
except Exception:
raise excep.UpdateMessageError(sub_error=bgp_cons.ERR_MSG_UPDATE_ATTR_LEN,
data='')
nlri_bin = value[3:]
# for IPv4
if afi == afn.AFNUM_INET:
# VPNv4
if safi == safn.SAFNUM_LAB_VPNUNICAST:
nlri = IPv4MPLSVPN.parse(nlri_bin, iswithdraw=True)
return dict(afi_safi=(afi, safi), withdraw=nlri)
# BGP flow spec
elif safi == safn.SAFNUM_FSPEC_RULE:
# if nlri length is greater than 240 bytes, it is encoded over 2 bytes
withdraw_list = []
while nlri_bin:
length = ord(nlri_bin[0])
if length >> 4 == 0xf and len(nlri_bin) > 2:
length = struct.unpack('!H', nlri_bin[:2])[0]
nlri_tmp = nlri_bin[2: length + 2]
nlri_bin = nlri_bin[length + 2:]
else:
nlri_tmp = nlri_bin[1: length + 1]
nlri_bin = nlri_bin[length + 1:]
nlri = IPv4FlowSpec.parse(nlri_tmp)
if nlri:
withdraw_list.append(nlri)
return dict(afi_safi=(afi, safi), withdraw=withdraw_list)
else:
return dict(afi_safi=(afn.AFNUM_INET, safi), withdraw=repr(nlri_bin))
# for ipv6
elif afi == afn.AFNUM_INET6:
# for ipv6 unicast
if safi == safn.SAFNUM_UNICAST:
return dict(afi_safi=(afi, safi), withdraw=IPv6Unicast.parse(nlri_data=nlri_bin))
elif safi == safn.SAFNUM_LAB_VPNUNICAST:
return dict(afi_safi=(afi, safi), withdraw=IPv6MPLSVPN.parse(value=nlri_bin, iswithdraw=True))
else:
return dict(afi_safi=(afi, safi), withdraw=repr(nlri_bin))
# for l2vpn
elif afi == afn.AFNUM_L2VPN:
# for evpn
if safi == safn.SAFNUM_EVPN:
return dict(afi_safi=(afi, safi), withdraw=EVPN.parse(nlri_data=nlri_bin))
else:
return dict(afi_safi=(afi, safi), withdraw=repr(nlri_bin))
# BGP LS
elif afi == afn.AFNUM_BGPLS:
if safi == safn.SAFNUM_BGPLS:
withdraw = BGPLS.parse(nlri_bin)
return dict(afi_safi=(afi, safi), withdraw=withdraw)
else:
pass
else:
return dict(afi_safi=(afi, safi), withdraw=repr(nlri_bin))
def parse(cls, value):
"""parse
"""
try:
afi, safi, nexthop_length = struct.unpack('!HBB', value[0:4])
nexthop_bin = value[4:4 + nexthop_length]
nlri_bin = value[5 + nexthop_length:]
except Exception:
# error when lenght is wrong
raise excep.UpdateMessageError(
sub_error=bgp_cons.ERR_MSG_UPDATE_ATTR_LEN, data=str(value))
# Address Family IPv4
if afi == afn.AFNUM_INET:
if safi == safn.SAFNUM_LAB_VPNUNICAST:
# MPLS VPN
# parse nexthop
rd_bin = nexthop_bin[0:8]
rd_type = struct.unpack('!H', rd_bin[0:2])[0]
rd_value_bin = rd_bin[2:]
if rd_type == 0:
asn, an = struct.unpack('!HI', rd_value_bin)
ipv4 = str(
netaddr.IPAddress(
int(binascii.b2a_hex(nexthop_bin[8:]), 16)))
nexthop = {'rd': '%s:%s' % (asn, an), 'str': ipv4}
else:
nexthop = binascii.b2a_hex((nexthop_bin[8:]))
# parse nlri
nlri = IPv4MPLSVPN.parse(nlri_bin)
return dict(afi_safi=(afi, safi), nexthop=nexthop, nlri=nlri)
elif safi == safn.SAFNUM_MPLS_LABEL:
if nexthop_bin:
nexthop = str(
netaddr.IPAddress(
int(binascii.b2a_hex(nexthop_bin), 16)))
else:
nexthop = ''
nlri = IPv4LabeledUnicast.parse(nlri_bin)
return dict(afi_safi=(afi, safi), nexthop=nexthop, nlri=nlri)
elif safi == safn.SAFNUM_FSPEC_RULE:
# if nlri length is greater than 240 bytes, it is encoded over 2 bytes
nlri_list = []
while nlri_bin:
length = ord(nlri_bin[0])
if length >> 4 == 0xf and len(nlri_bin) > 2:
length = struct.unpack('!H', nlri_bin[:2])[0]
nlri_tmp = nlri_bin[2:length + 2]
nlri_bin = nlri_bin[length + 2:]
else:
nlri_tmp = nlri_bin[1:length + 1]
nlri_bin = nlri_bin[length + 1:]
nlri = IPv4FlowSpec.parse(nlri_tmp)
if nlri:
nlri_list.append(nlri)
if nexthop_bin:
nexthop = str(
netaddr.IPAddress(
int(binascii.b2a_hex(nexthop_bin), 16)))
else:
nexthop = ''
return dict(afi_safi=(afi, safi),
nexthop=nexthop,
nlri=nlri_list)
else:
nlri = binascii.b2a_hex(nlri_bin)
# # Address Family IPv6
elif afi == afn.AFNUM_INET6:
# IPv6 unicast
if safi == safn.SAFNUM_UNICAST:
# decode nexthop
# RFC 2545
# The value of the Length of Next Hop Network Address field on a
# MP_REACH_NLRI attribute shall be set to 16, when only a global
# address is present, or 32 if a link-local address is also included in
# the Next Hop field.
#
# The link-local address shall be included in the Next Hop field if and
# only if the BGP speaker shares a common subnet with the entity
# identified by the global IPv6 address carried in the Network Address
# of Next Hop field and the peer the route is being advertised to.
nexthop_addrlen = 16
has_link_local = False
nexthop = str(
netaddr.IPAddress(
int(binascii.b2a_hex(nexthop_bin[:nexthop_addrlen]),
16)))
if len(nexthop_bin) == 2 * nexthop_addrlen:
# has link local address
has_link_local = True
linklocal_nexthop = str(
netaddr.IPAddress(
int(
binascii.b2a_hex(
nexthop_bin[nexthop_addrlen:]), 16)))
nlri = IPv6Unicast.parse(nlri_bin)
if has_link_local:
return dict(afi_safi=(afi, safi),
nexthop=nexthop,
linklocal_nexthop=linklocal_nexthop,
nlri=nlri)
else:
return dict(afi_safi=(afi, safi),
nexthop=nexthop,
nlri=nlri)
elif safi == safn.SAFNUM_LAB_VPNUNICAST:
# IPv6 MPLS VPN
# parse nexthop
rd_bin = nexthop_bin[0:8]
rd_type = struct.unpack('!H', rd_bin[0:2])[0]
rd_value_bin = rd_bin[2:]
if rd_type == 0:
asn, an = struct.unpack('!HI', rd_value_bin)
ipv6 = str(
netaddr.IPAddress(
int(binascii.b2a_hex(nexthop_bin[8:]), 16)))
nexthop = {'rd': '%s:%s' % (asn, an), 'str': ipv6}
# TODO(xiaoquwl) for other RD type decoding
else:
nexthop = binascii.b2a_hex(nexthop_bin[8:])
# parse nlri
nlri = IPv6MPLSVPN.parse(nlri_bin)
return dict(afi_safi=(afi, safi), nexthop=nexthop, nlri=nlri)
elif safi == safn.SAFNUM_MPLS_LABEL:
if nexthop_bin:
nexthop = str(
netaddr.IPAddress(
int(binascii.b2a_hex(nexthop_bin), 16)))
else:
nexthop = ''
nlri = IPv6LabeledUnicast.parse(nlri_bin)
return dict(afi_safi=(afi, safi), nexthop=nexthop, nlri=nlri)
else:
return dict(afi_safi=(afi, safi),
nexthop=nexthop_bin,
nlri=nlri_bin)
# for l2vpn
elif afi == afn.AFNUM_L2VPN:
if safi == safn.SAFNUM_EVPN:
nexthop = str(
netaddr.IPAddress(int(binascii.b2a_hex(nexthop_bin), 16)))
nlri = EVPN.parse(nlri_bin)
return dict(afi_safi=(afi, safi), nexthop=nexthop, nlri=nlri)
else:
nlri = binascii.b2a_hex(nlri_bin)
# BGP LS
elif afi == afn.AFNUM_BGPLS:
if safi == safn.SAFNUM_BGPLS:
nexthop = str(
netaddr.IPAddress(int(binascii.b2a_hex(nexthop_bin), 16)))
nlri = BGPLS.parse(nlri_bin)
return dict(afi_safi=(afi, safi), nexthop=nexthop, nlri=nlri)
else:
pass
else:
nlri = binascii.b2a_hex(nlri_bin)
return dict(afi_safi=(afi, safi),
nexthop=binascii.b2a_hex(nexthop_bin),
nlri=binascii.b2a_hex(nlri_bin))