def run(gobgpd_addr, vrf_name, prefix, nexthop):
channel = implementations.insecure_channel(gobgpd_addr, 50051)
with gobgp_pb2.beta_create_GobgpApi_stub(channel) as stub:
subnet = IPNetwork(prefix)
ipaddr = subnet.ip
masklen = subnet.prefixlen
nlri = IPAddrPrefix(addr=ipaddr, length=masklen)
bin_nlri = nlri.serialize()
nexthop = BGPPathAttributeNextHop(value=nexthop)
bin_nexthop = nexthop.serialize()
origin = BGPPathAttributeOrigin(value=2)
bin_origin = origin.serialize()
pattrs = []
pattrs.append(str(bin_nexthop))
pattrs.append(str(bin_origin))
path = {}
path['nlri'] = str(bin_nlri)
path['pattrs'] = pattrs
uuid = stub.ModPath(gobgp_pb2.ModPathArguments(resource=Resource_VRF, name=vrf_name, path=path), _TIMEOUT_SECONDS)
if uuid:
print "Success!"
else:
print "Error!"
def add_to_global_table(self, prefix, nexthop=None, is_withdraw=False):
src_ver_num = 1
peer = None
# set mandatory path attributes
origin = BGPPathAttributeOrigin(BGP_ATTR_ORIGIN_IGP)
aspath = BGPPathAttributeAsPath([[]])
pathattrs = OrderedDict()
pathattrs[BGP_ATTR_TYPE_ORIGIN] = origin
pathattrs[BGP_ATTR_TYPE_AS_PATH] = aspath
net = netaddr.IPNetwork(prefix)
ip = str(net.ip)
masklen = net.prefixlen
if netaddr.valid_ipv4(ip):
_nlri = IPAddrPrefix(masklen, ip)
if nexthop is None:
nexthop = '0.0.0.0'
p = Ipv4Path
else:
_nlri = IP6AddrPrefix(masklen, ip)
if nexthop is None:
nexthop = '::'
p = Ipv6Path
new_path = p(peer,
_nlri,
src_ver_num,
pattrs=pathattrs,
nexthop=nexthop,
is_withdraw=is_withdraw)
# add to global ipv4 table and propagates to neighbors
self.learn_path(new_path)
def _test_update_global_table(self, learn_path_mock, prefix, next_hop,
is_withdraw, expected_next_hop):
# Prepare test data
origin = BGPPathAttributeOrigin(BGP_ATTR_ORIGIN_IGP)
aspath = BGPPathAttributeAsPath([[]])
pathattrs = OrderedDict()
pathattrs[BGP_ATTR_TYPE_ORIGIN] = origin
pathattrs[BGP_ATTR_TYPE_AS_PATH] = aspath
pathattrs = str(pathattrs)
# Instantiate TableCoreManager
tbl_mng = table_manager.TableCoreManager(None, None)
# Test
tbl_mng.update_global_table(
prefix=prefix,
next_hop=next_hop,
is_withdraw=is_withdraw,
)
# Check
call_args_list = learn_path_mock.call_args_list
ok_(len(call_args_list) == 1) # learn_path should be called once
args, kwargs = call_args_list[0]
ok_(len(kwargs) == 0) # no keyword argument
output_path = args[0]
eq_(None, output_path.source)
eq_(prefix, output_path.nlri.prefix)
eq_(pathattrs, str(output_path.pathattr_map))
eq_(expected_next_hop, output_path.nexthop)
eq_(is_withdraw, output_path.is_withdraw)
def insert_vrffs_path(self, nlri, communities, is_withdraw=False):
assert nlri
assert isinstance(communities, list)
vrf_conf = self.vrf_conf
from ryu.services.protocols.bgp.core import EXPECTED_ORIGIN
pattrs = OrderedDict()
pattrs[BGP_ATTR_TYPE_ORIGIN] = BGPPathAttributeOrigin(EXPECTED_ORIGIN)
pattrs[BGP_ATTR_TYPE_AS_PATH] = BGPPathAttributeAsPath([])
for rt in vrf_conf.export_rts:
communities.append(create_rt_extended_community(rt, 2))
for soo in vrf_conf.soo_list:
communities.append(create_rt_extended_community(soo, 3))
pattrs[BGP_ATTR_TYPE_EXTENDED_COMMUNITIES] = (
BGPPathAttributeExtendedCommunities(communities=communities))
puid = self.VRF_PATH_CLASS.create_puid(vrf_conf.route_dist,
nlri.prefix)
path = self.VRF_PATH_CLASS(puid,
None,
nlri,
0,
pattrs=pattrs,
is_withdraw=is_withdraw)
# Insert the path into VRF table, get affected destination so that we
# can process it further.
eff_dest = self.insert(path)
# Enqueue the eff_dest for further processing.
self._signal_bus.dest_changed(eff_dest)
def insert_vrf_path(self,
ip_nlri,
next_hop=None,
gen_lbl=False,
is_withdraw=False):
assert ip_nlri
pattrs = None
label_list = []
vrf_conf = self.vrf_conf
if not is_withdraw:
# Create a dictionary for path-attrs.
pattrs = OrderedDict()
# MpReachNlri and/or MpUnReachNlri attribute info. is contained
# in the path. Hence we do not add these attributes here.
from ryu.services.protocols.bgp.core import EXPECTED_ORIGIN
pattrs[BGP_ATTR_TYPE_ORIGIN] = BGPPathAttributeOrigin(
EXPECTED_ORIGIN)
pattrs[BGP_ATTR_TYPE_AS_PATH] = BGPPathAttributeAsPath([])
pattrs[BGP_ATTR_TYPE_EXTENDED_COMMUNITIES] = \
BGPPathAttributeExtendedCommunities(
rt_list=vrf_conf.export_rts, soo_list=vrf_conf.soo_list)
if vrf_conf.multi_exit_disc:
pattrs[BGP_ATTR_TYPE_MULTI_EXIT_DISC] = \
BGPPathAttributeMultiExitDisc(vrf_conf.multi_exit_disc)
table_manager = self._core_service.table_manager
if gen_lbl and next_hop:
# Label per next_hop demands we use a different label
# per next_hop. Here connected interfaces are advertised per
# VRF.
label_key = (vrf_conf.route_dist, next_hop)
nh_label = table_manager.get_nexthop_label(label_key)
if not nh_label:
nh_label = table_manager.get_next_vpnv4_label()
table_manager.set_nexthop_label(label_key, nh_label)
label_list.append(nh_label)
elif gen_lbl:
# If we do not have next_hop, get a new label.
label_list.append(table_manager.get_next_vpnv4_label())
puid = self.VRF_PATH_CLASS.create_puid(vrf_conf.route_dist,
ip_nlri.prefix)
path = self.VRF_PATH_CLASS(puid,
None,
ip_nlri,
0,
pattrs=pattrs,
nexthop=next_hop,
label_list=label_list,
is_withdraw=is_withdraw)
# Insert the path into VRF table, get affected destination so that we
# can process it further.
eff_dest = self.insert(path)
# Enqueue the eff_dest for further processing.
self._signal_bus.dest_changed(eff_dest)
return label_list
def update_flowspec_global_table(self,
flowspec_family,
rules,
actions=None,
is_withdraw=False):
"""Update a BGP route in the Global table for Flow Specification.
``flowspec_family`` specifies one of the Flow Specification
family name.
``rules`` specifies NLRIs of Flow Specification as
a dictionary type value.
`` actions`` specifies Traffic Filtering Actions of
Flow Specification as a dictionary type value.
If `is_withdraw` is False, which is the default, add a BGP route
to the Global table.
If `is_withdraw` is True, remove a BGP route from the Global table.
"""
from ryu.services.protocols.bgp.core import BgpCoreError
from ryu.services.protocols.bgp.api.prefix import FLOWSPEC_FAMILY_IPV4
src_ver_num = 1
peer = None
# set mandatory path attributes
origin = BGPPathAttributeOrigin(BGP_ATTR_ORIGIN_IGP)
aspath = BGPPathAttributeAsPath([[]])
pathattrs = OrderedDict()
pathattrs[BGP_ATTR_TYPE_ORIGIN] = origin
pathattrs[BGP_ATTR_TYPE_AS_PATH] = aspath
if flowspec_family == FLOWSPEC_FAMILY_IPV4:
_nlri = FlowSpecIPv4NLRI.from_user(**rules)
p = IPv4FlowSpecPath
try:
communities = create_v4flowspec_actions(actions)
except ValueError as e:
raise BgpCoreError(desc=str(e))
if communities:
pathattrs[BGP_ATTR_TYPE_EXTENDED_COMMUNITIES] = (
BGPPathAttributeExtendedCommunities(
communities=communities))
else:
raise BgpCoreError(desc='Unsupported flowspec family %s' %
flowspec_family)
new_path = p(peer,
_nlri,
src_ver_num,
pattrs=pathattrs,
is_withdraw=is_withdraw)
# add to global table and propagates to neighbors
self.learn_path(new_path)
def modpath(self,gobgpd_addr,originate_path_list):
channel = implementations.insecure_channel(gobgpd_addr, 50051)
with gobgp_pb2.beta_create_GobgpApi_stub(channel) as stub:
paths = []
for originate_path in originate_path_list:
pattrs = []
path = {}
subnet = IPNetwork(originate_path['route'])
ver = subnet.version
addr = subnet.ip
mask = subnet.prefixlen
if ver == 4:
nlri = IPAddrPrefix(addr=addr, length=mask)
nexthop = BGPPathAttributeNextHop(value=originate_path['next_hop'])
else :
nlri = IP6AddrPrefix(addr=addr, length=mask)
nexthop = BGPPathAttributeMpReachNLRI(next_hop = originate_path['next_hop'],nlri = [nlri],afi = AFI_IPV6 , safi = SAFI_UNICAST)
bin_nlri = nlri.serialize()
bin_nexthop = nexthop.serialize()
pattrs.append(str(bin_nexthop))
origin = BGPPathAttributeOrigin(value=ORIGIN)
bin_origin = origin.serialize()
pattrs.append(str(bin_origin))
if originate_path['community'] :
community_set = self.community_convert(originate_path['community'])
communities = BGPPathAttributeCommunities(communities=community_set)
bin_communities = communities.serialize()
pattrs.append(str(bin_communities))
#as_path = BGPPathAttributeAs4Path(value=[[1234,1111]])
#bin_as_path = as_path.serialize()
#pattrs.append(str(bin_as_path))
path['nlri'] = str(bin_nlri)
path['pattrs'] = pattrs
paths.append(path)
args = []
args.append(gobgp_pb2.ModPathsArguments(resource=Resource_GLOBAL, paths=paths))
ret = stub.ModPaths(args, _TIMEOUT_SECONDS)
def _add_rt_nlri_for_as(self, rtc_as, route_target, is_withdraw=False):
from ryu.services.protocols.bgp.core import EXPECTED_ORIGIN
rt_nlri = RouteTargetMembershipNLRI(rtc_as, route_target)
# Create a dictionary for path-attrs.
pattrs = OrderedDict()
if not is_withdraw:
# MpReachNlri and/or MpUnReachNlri attribute info. is contained
# in the path. Hence we do not add these attributes here.
pattrs[BGP_ATTR_TYPE_ORIGIN] = BGPPathAttributeOrigin(
EXPECTED_ORIGIN)
pattrs[BGP_ATTR_TYPE_AS_PATH] = BGPPathAttributeAsPath([])
# Create Path instance and initialize appropriately.
path = RtcPath(None, rt_nlri, 0, is_withdraw=is_withdraw,
pattrs=pattrs)
tm = self._core_service.table_manager
tm.learn_path(path)
def add_to_ipv4_global_table(self, prefix, is_withdraw=False):
ip, masklen = prefix.split('/')
_nlri = IPAddrPrefix(int(masklen), ip)
src_ver_num = 1
peer = None
# set mandatory path attributes
nexthop = '0.0.0.0'
origin = BGPPathAttributeOrigin(BGP_ATTR_ORIGIN_IGP)
aspath = BGPPathAttributeAsPath([[]])
pathattrs = OrderedDict()
pathattrs[BGP_ATTR_TYPE_ORIGIN] = origin
pathattrs[BGP_ATTR_TYPE_AS_PATH] = aspath
new_path = Ipv4Path(peer, _nlri, src_ver_num,
pattrs=pathattrs, nexthop=nexthop,
is_withdraw=is_withdraw)
# add to global ipv4 table and propagates to neighbors
self.learn_path(new_path)
def update_global_table(self, prefix, next_hop=None, is_withdraw=False):
"""Update a BGP route in the Global table for the given `prefix`
with the given `next_hop`.
If `is_withdraw` is False, which is the default, add a BGP route
to the Global table.
If `is_withdraw` is True, remove a BGP route from the Global table.
"""
src_ver_num = 1
peer = None
# set mandatory path attributes
origin = BGPPathAttributeOrigin(BGP_ATTR_ORIGIN_IGP)
aspath = BGPPathAttributeAsPath([[]])
pathattrs = OrderedDict()
pathattrs[BGP_ATTR_TYPE_ORIGIN] = origin
pathattrs[BGP_ATTR_TYPE_AS_PATH] = aspath
net = netaddr.IPNetwork(prefix)
addr = str(net.ip)
masklen = net.prefixlen
if ip.valid_ipv4(addr):
_nlri = IPAddrPrefix(masklen, addr)
if next_hop is None:
next_hop = '0.0.0.0'
p = Ipv4Path
else:
_nlri = IP6AddrPrefix(masklen, addr)
if next_hop is None:
next_hop = '::'
p = Ipv6Path
new_path = p(peer,
_nlri,
src_ver_num,
pattrs=pathattrs,
nexthop=next_hop,
is_withdraw=is_withdraw)
# add to global table and propagates to neighbors
self.learn_path(new_path)
def insert_vrf_path(self,
nlri,
next_hop=None,
gen_lbl=False,
is_withdraw=False,
**kwargs):
assert nlri
pattrs = None
label_list = []
vrf_conf = self.vrf_conf
if not is_withdraw:
table_manager = self._core_service.table_manager
if gen_lbl and next_hop:
# Label per next_hop demands we use a different label
# per next_hop. Here connected interfaces are advertised per
# VRF.
label_key = (vrf_conf.route_dist, next_hop)
nh_label = table_manager.get_nexthop_label(label_key)
if not nh_label:
nh_label = table_manager.get_next_vpnv4_label()
table_manager.set_nexthop_label(label_key, nh_label)
label_list.append(nh_label)
elif gen_lbl:
# If we do not have next_hop, get a new label.
label_list.append(table_manager.get_next_vpnv4_label())
# Set MPLS labels with the generated labels
if gen_lbl and isinstance(nlri, EvpnMacIPAdvertisementNLRI):
nlri.mpls_labels = label_list[:2]
elif gen_lbl and isinstance(nlri, EvpnIpPrefixNLRI):
nlri.mpls_label = label_list[0]
# Create a dictionary for path-attrs.
pattrs = OrderedDict()
# MpReachNlri and/or MpUnReachNlri attribute info. is contained
# in the path. Hence we do not add these attributes here.
from ryu.services.protocols.bgp.core import EXPECTED_ORIGIN
pattrs[BGP_ATTR_TYPE_ORIGIN] = BGPPathAttributeOrigin(
EXPECTED_ORIGIN)
pattrs[BGP_ATTR_TYPE_AS_PATH] = BGPPathAttributeAsPath([])
communities = []
# Set ES-Import Route Target
if isinstance(nlri, EvpnEthernetSegmentNLRI):
subtype = 2
es_import = nlri.esi.mac_addr
communities.append(
BGPEvpnEsImportRTExtendedCommunity(subtype=subtype,
es_import=es_import))
for rt in vrf_conf.export_rts:
communities.append(create_rt_extended_community(rt, 2))
for soo in vrf_conf.soo_list:
communities.append(create_rt_extended_community(soo, 3))
# Set Tunnel Encapsulation Attribute
tunnel_type = kwargs.get('tunnel_type', None)
if tunnel_type:
communities.append(
BGPEncapsulationExtendedCommunity.from_str(tunnel_type))
# Set ESI Label Extended Community
redundancy_mode = kwargs.get('redundancy_mode', None)
if redundancy_mode is not None:
subtype = 1
flags = 0
from ryu.services.protocols.bgp.api.prefix import (
REDUNDANCY_MODE_SINGLE_ACTIVE)
if redundancy_mode == REDUNDANCY_MODE_SINGLE_ACTIVE:
flags |= BGPEvpnEsiLabelExtendedCommunity.SINGLE_ACTIVE_BIT
vni = kwargs.get('vni', None)
if vni is not None:
communities.append(
BGPEvpnEsiLabelExtendedCommunity(subtype=subtype,
flags=flags,
vni=vni))
else:
communities.append(
BGPEvpnEsiLabelExtendedCommunity(
subtype=subtype,
flags=flags,
mpls_label=label_list[0]))
pattrs[BGP_ATTR_TYPE_EXTENDED_COMMUNITIES] = \
BGPPathAttributeExtendedCommunities(communities=communities)
if vrf_conf.multi_exit_disc:
pattrs[BGP_ATTR_TYPE_MULTI_EXIT_DISC] = \
BGPPathAttributeMultiExitDisc(vrf_conf.multi_exit_disc)
# Set PMSI Tunnel Attribute
pmsi_tunnel_type = kwargs.get('pmsi_tunnel_type', None)
if pmsi_tunnel_type is not None:
from ryu.services.protocols.bgp.api.prefix import (
PMSI_TYPE_INGRESS_REP)
if pmsi_tunnel_type == PMSI_TYPE_INGRESS_REP:
tunnel_id = PmsiTunnelIdIngressReplication(
tunnel_endpoint_ip=self._core_service.router_id)
else: # pmsi_tunnel_type == PMSI_TYPE_NO_TUNNEL_INFO
tunnel_id = None
pattrs[BGP_ATTR_TYEP_PMSI_TUNNEL_ATTRIBUTE] = \
BGPPathAttributePmsiTunnel(pmsi_flags=0,
tunnel_type=pmsi_tunnel_type,
tunnel_id=tunnel_id,
vni=kwargs.get('vni', None))
puid = self.VRF_PATH_CLASS.create_puid(vrf_conf.route_dist,
nlri.prefix)
path = self.VRF_PATH_CLASS(puid,
None,
nlri,
0,
pattrs=pattrs,
nexthop=next_hop,
label_list=label_list,
is_withdraw=is_withdraw)
# Insert the path into VRF table, get affected destination so that we
# can process it further.
eff_dest = self.insert(path)
# Enqueue the eff_dest for further processing.
self._signal_bus.dest_changed(eff_dest)
return label_list
def insert_vrf_path(self,
nlri,
next_hop=None,
gen_lbl=False,
is_withdraw=False,
**kwargs):
assert nlri
pattrs = None
label_list = []
vrf_conf = self.vrf_conf
if not is_withdraw:
# Create a dictionary for path-attrs.
pattrs = OrderedDict()
# MpReachNlri and/or MpUnReachNlri attribute info. is contained
# in the path. Hence we do not add these attributes here.
from ryu.services.protocols.bgp.core import EXPECTED_ORIGIN
pattrs[BGP_ATTR_TYPE_ORIGIN] = BGPPathAttributeOrigin(
EXPECTED_ORIGIN)
pattrs[BGP_ATTR_TYPE_AS_PATH] = BGPPathAttributeAsPath([])
communities = []
for rt in vrf_conf.export_rts:
as_num, local_admin = rt.split(':')
subtype = 2
communities.append(
BGPTwoOctetAsSpecificExtendedCommunity(
as_number=int(as_num),
local_administrator=int(local_admin),
subtype=subtype))
for soo in vrf_conf.soo_list:
as_num, local_admin = soo.split(':')
subtype = 3
communities.append(
BGPTwoOctetAsSpecificExtendedCommunity(
as_number=int(as_num),
local_administrator=int(local_admin),
subtype=subtype))
# Set Tunnel Encapsulation Attribute
tunnel_type = kwargs.get('tunnel_type', None)
if tunnel_type:
communities.append(
BGPEncapsulationExtendedCommunity.from_str(tunnel_type))
pattrs[BGP_ATTR_TYPE_EXTENDED_COMMUNITIES] = \
BGPPathAttributeExtendedCommunities(communities=communities)
if vrf_conf.multi_exit_disc:
pattrs[BGP_ATTR_TYPE_MULTI_EXIT_DISC] = \
BGPPathAttributeMultiExitDisc(vrf_conf.multi_exit_disc)
table_manager = self._core_service.table_manager
if gen_lbl and next_hop:
# Label per next_hop demands we use a different label
# per next_hop. Here connected interfaces are advertised per
# VRF.
label_key = (vrf_conf.route_dist, next_hop)
nh_label = table_manager.get_nexthop_label(label_key)
if not nh_label:
nh_label = table_manager.get_next_vpnv4_label()
table_manager.set_nexthop_label(label_key, nh_label)
label_list.append(nh_label)
elif gen_lbl:
# If we do not have next_hop, get a new label.
label_list.append(table_manager.get_next_vpnv4_label())
# Set PMSI Tunnel Attribute
pmsi_tunnel_type = kwargs.get('pmsi_tunnel_type', None)
if pmsi_tunnel_type is not None:
from ryu.services.protocols.bgp.api.prefix import (
PMSI_TYPE_INGRESS_REP)
if pmsi_tunnel_type == PMSI_TYPE_INGRESS_REP:
tunnel_id = PmsiTunnelIdIngressReplication(
tunnel_endpoint_ip=self._core_service.router_id)
else: # pmsi_tunnel_type == PMSI_TYPE_NO_TUNNEL_INFO
tunnel_id = None
pattrs[BGP_ATTR_TYEP_PMSI_TUNNEL_ATTRIBUTE] = \
BGPPathAttributePmsiTunnel(pmsi_flags=0,
tunnel_type=pmsi_tunnel_type,
tunnel_id=tunnel_id)
# Set MPLS labels with the generated labels
if gen_lbl and isinstance(nlri, EvpnMacIPAdvertisementNLRI):
nlri.mpls_labels = label_list[:2]
puid = self.VRF_PATH_CLASS.create_puid(vrf_conf.route_dist,
nlri.prefix)
path = self.VRF_PATH_CLASS(puid,
None,
nlri,
0,
pattrs=pattrs,
nexthop=next_hop,
label_list=label_list,
is_withdraw=is_withdraw)
# Insert the path into VRF table, get affected destination so that we
# can process it further.
eff_dest = self.insert(path)
# Enqueue the eff_dest for further processing.
self._signal_bus.dest_changed(eff_dest)
return label_list
