def _construct_update(self, path):
# Get copy of path's path attributes.
new_pathattr = [attr for attr in path.pathattr_map.itervalues()]
if path.is_withdraw:
if isinstance(path, Ipv4Path):
return BGPUpdate(withdrawn_routes=[path.nlri],
path_attributes=new_pathattr)
else:
mpunreach_attr = BGPPathAttributeMpUnreachNLRI(
path.route_family.afi, path.route_family.safi, [path.nlri]
)
new_pathattr.append(mpunreach_attr)
else:
if isinstance(path, Ipv4Path):
nexthop_attr = BGPPathAttributeNextHop(path.nexthop)
new_pathattr.append(nexthop_attr)
return BGPUpdate(nlri=[path.nlri],
path_attributes=new_pathattr)
else:
mpnlri_attr = BGPPathAttributeMpReachNLRI(
path.route_family.afi,
path.route_family.safi,
path.nexthop,
[path.nlri]
)
new_pathattr.append(mpnlri_attr)
return BGPUpdate(path_attributes=new_pathattr)
def create_end_of_rib_update():
"""Construct end-of-rib (EOR) Update instance."""
mpunreach_attr = BGPPathAttributeMpUnreachNLRI(RF_IPv4_VPN.afi,
RF_IPv4_VPN.safi,
[])
eor = BGPUpdate(path_attributes=[mpunreach_attr])
return eor