packet/bgp: Support L2VPN Flow Spec
Signed-off-by: Satoshi Fujimoto <satoshi.fujimoto7@gmail.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
Satoshi Fujimoto
FUJITA Tomonori
parent
b327981534
commit
d37a311829
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@ -577,6 +577,8 @@ RF_IPv4_FLOWSPEC = RouteFamily(addr_family.IP, subaddr_family.IP_FLOWSPEC)
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RF_IPv6_FLOWSPEC = RouteFamily(addr_family.IP6, subaddr_family.IP_FLOWSPEC)
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RF_VPNv4_FLOWSPEC = RouteFamily(addr_family.IP, subaddr_family.VPN_FLOWSPEC)
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RF_VPNv6_FLOWSPEC = RouteFamily(addr_family.IP6, subaddr_family.VPN_FLOWSPEC)
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RF_L2VPN_FLOWSPEC = RouteFamily(
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addr_family.L2VPN, subaddr_family.VPN_FLOWSPEC)
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RF_RTC_UC = RouteFamily(addr_family.IP,
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subaddr_family.ROUTE_TARGET_CONSTRAINTS)
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@ -592,6 +594,7 @@ _rf_map = {
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(addr_family.IP6, subaddr_family.IP_FLOWSPEC): RF_IPv6_FLOWSPEC,
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(addr_family.IP, subaddr_family.VPN_FLOWSPEC): RF_VPNv4_FLOWSPEC,
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(addr_family.IP6, subaddr_family.VPN_FLOWSPEC): RF_VPNv6_FLOWSPEC,
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(addr_family.L2VPN, subaddr_family.VPN_FLOWSPEC): RF_L2VPN_FLOWSPEC,
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(addr_family.IP, subaddr_family.ROUTE_TARGET_CONSTRAINTS): RF_RTC_UC
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}
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@ -2385,6 +2388,74 @@ class FlowSpecVPNv6NLRI(_FlowSpecNLRIBase):
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return '%s:%s' % (self.route_dist, self.prefix)
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class FlowSpecL2VPNNLRI(_FlowSpecNLRIBase):
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"""
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Flow Specification NLRI class for L2VPN [draft-ietf-idr-flowspec-l2vpn-05]
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"""
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# flow-spec NLRI:
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# +-----------------------------------+
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# | length (0xnn or 0xfn nn) |
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# +-----------------------------------+
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# | RD (8 octets) |
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# +-----------------------------------+
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# | NLRI value (variable) |
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# +-----------------------------------+
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ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
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FLOWSPEC_FAMILY = 'l2vpnfs'
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def __init__(self, length=0, route_dist=None, rules=None):
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super(FlowSpecL2VPNNLRI, self).__init__(length, rules)
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assert route_dist is not None
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self.route_dist = route_dist
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@classmethod
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def _from_user(cls, route_dist, **kwargs):
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rules = []
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for k, v in kwargs.items():
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subcls = _FlowSpecComponentBase.lookup_type_name(
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k, cls.ROUTE_FAMILY.afi)
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rule = subcls.from_str(str(v))
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rules.extend(rule)
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rules.sort(key=lambda x: x.type)
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return cls(route_dist=route_dist, rules=rules)
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@classmethod
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def from_user(cls, route_dist, **kwargs):
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"""
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Utility method for creating a L2VPN NLRI instance.
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This function returns a L2VPN NLRI instance
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from human readable format value.
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:param kwargs: The following arguments are available.
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============== ============= ========= ==============================
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Argument Value Operator Description
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============== ============= ========= ==============================
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ether_type Integer Numeric Ethernet Type.
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src_mac Mac Address Nothing Source Mac address.
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dst_mac Mac Address Nothing Destination Mac address.
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llc_ssap Integer Numeric Source Service Access Point
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in LLC.
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llc_dsap Integer Numeric Destination Service Access
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Point in LLC.
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llc_control Integer Numeric Control field in LLC.
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snap Integer Numeric Sub-Network Access Protocol
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field.
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vlan_id Integer Numeric VLAN ID.
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vlan_cos Integer Numeric VLAN COS field.
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inner_vlan_id Integer Numeric Inner VLAN ID.
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inner_vlan_cos Integer Numeric Inner VLAN COS field.
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============== ============= ========= ==============================
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"""
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return cls._from_user(route_dist, **kwargs)
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@property
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def formatted_nlri_str(self):
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return '%s:%s' % (self.route_dist, self.prefix)
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class _FlowSpecComponentBase(StringifyMixin, TypeDisp):
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"""
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Base class for Flow Specification NLRI component
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@ -2476,6 +2547,23 @@ class _FlowSpecIPv6Component(_FlowSpecComponentBase):
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TYPE_FLOW_LABEL = 0x0d
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class _FlowSpecL2VPNComponent(_FlowSpecComponentBase):
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"""
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Base class for Flow Specification for L2VPN NLRI component
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"""
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TYPE_ETHER_TYPE = 0x0e
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TYPE_SOURCE_MAC = 0x0f
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TYPE_DESTINATION_MAC = 0x10
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TYPE_LLC_DSAP = 0x11
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TYPE_LLC_SSAP = 0x12
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TYPE_LLC_CONTROL = 0x13
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TYPE_SNAP = 0x14
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TYPE_VLAN_ID = 0x15
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TYPE_VLAN_COS = 0x16
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TYPE_INNER_VLAN_ID = 0x17
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TYPE_INNER_VLAN_COS = 0x18
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@_FlowSpecComponentBase.register_unknown_type()
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class FlowSpecComponentUnknown(_FlowSpecComponentBase):
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"""
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@ -2582,6 +2670,44 @@ class _FlowSpecIPv6PrefixBase(_FlowSpecIPv6Component, IP6AddrPrefix):
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return self.value
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class _FlowSpecL2VPNPrefixBase(_FlowSpecL2VPNComponent):
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"""
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Prefix base class for Flow Specification NLRI component
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"""
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_PACK_STR = "!B6s"
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def __init__(self, length, addr, type_=None):
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super(_FlowSpecL2VPNPrefixBase, self).__init__(type_)
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self.length = length
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self.addr = addr.lower()
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@classmethod
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def parse_body(cls, buf):
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(length, addr) = struct.unpack_from(
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cls._PACK_STR, six.binary_type(buf))
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rest = buf[struct.calcsize(cls._PACK_STR):]
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addr = addrconv.mac.bin_to_text(addr)
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return cls(length=length, addr=addr), rest
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def serialize(self):
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addr = addrconv.mac.text_to_bin(self.addr)
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return struct.pack(self._PACK_STR, self.length, addr)
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def serialize_body(self):
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return self.serialize()
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@classmethod
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def from_str(cls, value):
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return [cls(len(value.split(':')), value)]
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@property
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def value(self):
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return self.addr
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def to_str(self):
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return self.value
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@_FlowSpecComponentBase.register_type(
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_FlowSpecIPv4Component.TYPE_DESTINATION_PREFIX, addr_family.IP)
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class FlowSpecDestPrefix(_FlowSpecPrefixBase):
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@ -3026,6 +3152,116 @@ class FlowSpecIPv6Fragment(_FlowSpecBitmask):
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_bitmask_flags[ISF] = 'ISF'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_ETHER_TYPE, addr_family.L2VPN)
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class FlowSpecEtherType(_FlowSpecNumeric):
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"""Ethernet Type field in an Ethernet frame.
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Set the 2 byte value of an Ethernet Type field at value.
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"""
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COMPONENT_NAME = 'ether_type'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_SOURCE_MAC, addr_family.L2VPN)
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class FlowSpecSourceMac(_FlowSpecL2VPNPrefixBase):
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"""Source Mac Address.
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Set the Mac Address at value.
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"""
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COMPONENT_NAME = 'src_mac'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_DESTINATION_MAC, addr_family.L2VPN)
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class FlowSpecDestinationMac(_FlowSpecL2VPNPrefixBase):
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"""Destination Mac Address.
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Set the Mac Address at value.
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"""
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COMPONENT_NAME = 'dst_mac'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_LLC_DSAP, addr_family.L2VPN)
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class FlowSpecLLCDSAP(_FlowSpecNumeric):
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"""Destination SAP field in LLC header in an Ethernet frame.
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Set the 2 byte value of an Destination SAP at value.
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"""
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COMPONENT_NAME = 'llc_dsap'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_LLC_SSAP, addr_family.L2VPN)
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class FlowSpecLLCSSAP(_FlowSpecNumeric):
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"""Source SAP field in LLC header in an Ethernet frame.
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Set the 2 byte value of an Source SAP at value.
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"""
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COMPONENT_NAME = 'llc_ssap'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_LLC_CONTROL, addr_family.L2VPN)
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class FlowSpecLLCControl(_FlowSpecNumeric):
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"""Control field in LLC header in an Ethernet frame.
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Set the Contorol field at value.
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"""
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COMPONENT_NAME = 'llc_control'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_SNAP, addr_family.L2VPN)
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class FlowSpecSNAP(_FlowSpecNumeric):
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"""Sub-Network Access Protocol field in an Ethernet frame.
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Set the 5 byte SNAP field at value.
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"""
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COMPONENT_NAME = 'snap'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_VLAN_ID, addr_family.L2VPN)
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class FlowSpecVLANID(_FlowSpecNumeric):
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"""VLAN ID.
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Set VLAN ID at value.
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"""
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COMPONENT_NAME = 'vlan_id'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_VLAN_COS, addr_family.L2VPN)
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class FlowSpecVLANCoS(_FlowSpecNumeric):
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"""VLAN CoS Fields in an Ethernet frame.
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Set the 3 bit CoS field at value.
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"""
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COMPONENT_NAME = 'vlan_cos'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_INNER_VLAN_ID, addr_family.L2VPN)
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class FlowSpecInnerVLANID(_FlowSpecNumeric):
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"""Inner VLAN ID.
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Set VLAN ID at value.
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"""
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COMPONENT_NAME = 'inner_vlan_id'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecL2VPNComponent.TYPE_INNER_VLAN_COS, addr_family.L2VPN)
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class FlowSpecInnerVLANCoS(_FlowSpecNumeric):
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"""VLAN CoS Fields in an Inner Ethernet frame.
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Set the 3 bit CoS field at value..
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"""
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COMPONENT_NAME = 'inner_vlan_cos'
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@_FlowSpecComponentBase.register_type(
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_FlowSpecIPv6Component.TYPE_FLOW_LABEL, addr_family.IP6)
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class FlowSpecIPv6FlowLabel(_FlowSpecNumeric):
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@ -3146,6 +3382,7 @@ _ADDR_CLASSES = {
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_addr_class_key(RF_IPv6_FLOWSPEC): FlowSpecIPv6NLRI,
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_addr_class_key(RF_VPNv4_FLOWSPEC): FlowSpecVPNv4NLRI,
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_addr_class_key(RF_VPNv6_FLOWSPEC): FlowSpecVPNv6NLRI,
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_addr_class_key(RF_L2VPN_FLOWSPEC): FlowSpecL2VPNNLRI,
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_addr_class_key(RF_RTC_UC): RouteTargetMembershipNLRI,
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}
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@ -3955,14 +4192,19 @@ class _ExtendedCommunity(StringifyMixin, TypeDisp, _Value):
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EVPN_ESI_LABEL = (EVPN, SUBTYPE_EVPN_ESI_LABEL)
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EVPN_ES_IMPORT_RT = (EVPN, SUBTYPE_EVPN_ES_IMPORT_RT)
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FLOWSPEC = 0x80
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FLOWSPEC_L2VPN = 0x08
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SUBTYPE_FLOWSPEC_TRAFFIC_RATE = 0x06
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SUBTYPE_FLOWSPEC_TRAFFIC_ACTION = 0x07
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SUBTYPE_FLOWSPEC_REDIRECT = 0x08
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SUBTYPE_FLOWSPEC_TRAFFIC_REMARKING = 0x09
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SUBTYPE_FLOWSPEC_VLAN_ACTION = 0x0a
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SUBTYPE_FLOWSPEC_TPID_ACTION = 0x0b
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FLOWSPEC_TRAFFIC_RATE = (FLOWSPEC, SUBTYPE_FLOWSPEC_TRAFFIC_RATE)
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FLOWSPEC_TRAFFIC_ACTION = (FLOWSPEC, SUBTYPE_FLOWSPEC_TRAFFIC_ACTION)
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FLOWSPEC_REDIRECT = (FLOWSPEC, SUBTYPE_FLOWSPEC_REDIRECT)
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FLOWSPEC_TRAFFIC_REMARKING = (FLOWSPEC, SUBTYPE_FLOWSPEC_TRAFFIC_REMARKING)
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FLOWSPEC_VLAN_ACTION = (FLOWSPEC_L2VPN, SUBTYPE_FLOWSPEC_VLAN_ACTION)
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FLOWSPEC_TPID_ACTION = (FLOWSPEC_L2VPN, SUBTYPE_FLOWSPEC_TPID_ACTION)
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def __init__(self, type_=None):
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if type_ is None:
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@ -4365,6 +4607,135 @@ class BGPFlowSpecTrafficMarkingCommunity(_ExtendedCommunity):
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# TODO
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# Implement "Redirect-IPv6" [draft-ietf-idr-flow-spec-v6-08]
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@_ExtendedCommunity.register_type(
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_ExtendedCommunity.FLOWSPEC_VLAN_ACTION)
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class BGPFlowSpecVlanActionCommunity(_ExtendedCommunity):
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"""
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Flow Specification Vlan Actions.
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========= ===============================================
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Attribute Description
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========= ===============================================
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actions_1 Bit representation of actions.
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Supported actions are
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``POP``, ``PUSH``, ``SWAP``, ``REWRITE_INNER``, ``REWRITE_OUTER``.
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actions_2 Same as ``actions_1``.
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vlan_1 VLAN ID used by ``actions_1``.
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cos_1 Class of Service used by ``actions_1``.
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vlan_2 VLAN ID used by ``actions_2``.
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cos_2 Class of Service used by ``actions_2``.
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========= ===============================================
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"""
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# 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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# | Type=0x08 | Sub-Type=0x0a |PO1|PU1|SW1|RT1|RO1|...|PO2|...|
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# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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# | VLAN ID1 | COS1 |0| VLAN ID2 | COS2 |0|
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# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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_VALUE_PACK_STR = '!BBBHH'
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_VALUE_FIELDS = [
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'subtype',
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'actions_1',
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'actions_2',
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'vlan_1',
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'vlan_2',
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'cos_1',
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'cos_2']
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ACTION_NAME = 'vlan_action'
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_COS_MASK = 0x07
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POP = 1 << 7
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PUSH = 1 << 6
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SWAP = 1 << 5
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REWRITE_INNER = 1 << 4
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REWRITE_OUTER = 1 << 3
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def __init__(self, **kwargs):
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super(BGPFlowSpecVlanActionCommunity, self).__init__()
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kwargs['subtype'] = self.SUBTYPE_FLOWSPEC_VLAN_ACTION
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self.do_init(BGPFlowSpecVlanActionCommunity, self, kwargs)
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@classmethod
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def parse_value(cls, buf):
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(subtype, actions_1, actions_2,
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vlan_cos_1, vlan_cos_2) = struct.unpack_from(cls._VALUE_PACK_STR, buf)
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return {
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'subtype': subtype,
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'actions_1': actions_1,
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'vlan_1': int(vlan_cos_1 >> 4),
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'cos_1': int((vlan_cos_1 >> 1) & cls._COS_MASK),
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'actions_2': actions_2,
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'vlan_2': int(vlan_cos_2 >> 4),
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'cos_2': int((vlan_cos_2 >> 1) & cls._COS_MASK)
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}
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def serialize_value(self):
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return struct.pack(
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self._VALUE_PACK_STR,
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self.subtype,
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self.actions_1,
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self.actions_2,
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(self.vlan_1 << 4) + (self.cos_1 << 1),
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(self.vlan_2 << 4) + (self.cos_2 << 1),
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)
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@_ExtendedCommunity.register_type(
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_ExtendedCommunity.FLOWSPEC_TPID_ACTION)
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class BGPFlowSpecTPIDActionCommunity(_ExtendedCommunity):
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"""
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Flow Specification TPID Actions.
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========= =========================================================
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Attribute Description
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========= =========================================================
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actions Bit representation of actions.
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Supported actions are
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``TI(inner TPID action)`` and ``TO(outer TPID action)``.
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tpid_1 TPID used by ``TI``.
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tpid_2 TPID used by ``TO``.
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========= =========================================================
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"""
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# 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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# | Type=0x08 | Sub-Type=0x0b |TI|TO| Reserved=0 |
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# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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# | TPID1 | TPID2 |
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# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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_VALUE_PACK_STR = '!BHHH'
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_VALUE_FIELDS = ['subtype', 'actions', 'tpid_1', 'tpid_2']
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ACTION_NAME = 'tpid_action'
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TI = 1 << 15
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TO = 1 << 14
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def __init__(self, **kwargs):
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super(BGPFlowSpecTPIDActionCommunity, self).__init__()
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kwargs['subtype'] = self.SUBTYPE_FLOWSPEC_TPID_ACTION
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self.do_init(BGPFlowSpecTPIDActionCommunity, self, kwargs)
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@classmethod
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def parse_value(cls, buf):
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(subtype, actions, tpid_1, tpid_2) = struct.unpack_from(
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cls._VALUE_PACK_STR, buf)
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return {
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'subtype': subtype,
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'actions': actions,
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'tpid_1': tpid_1,
|
||||
'tpid_2': tpid_2,
|
||||
}
|
||||
|
||||
def serialize_value(self):
|
||||
return struct.pack(
|
||||
self._VALUE_PACK_STR,
|
||||
self.subtype,
|
||||
self.actions,
|
||||
self.tpid_1,
|
||||
self.tpid_2,
|
||||
)
|
||||
|
||||
|
||||
@_ExtendedCommunity.register_unknown_type()
|
||||
class BGPUnknownExtendedCommunity(_ExtendedCommunity):
|
||||
_VALUE_PACK_STR = '!7s' # opaque value
|
||||
|
|
@ -4466,6 +4837,8 @@ class BGPPathAttributeMpReachNLRI(_PathAttribute):
|
|||
elif (afi == addr_family.IP6
|
||||
or (rf == RF_L2_EVPN and next_hop_len >= 16)):
|
||||
next_hop = cls.parse_next_hop_ipv6(next_hop_bin, 16)
|
||||
elif rf == RF_L2VPN_FLOWSPEC:
|
||||
next_hop = []
|
||||
else:
|
||||
raise ValueError('Invalid address family: afi=%d, safi=%d'
|
||||
% (afi, safi))
|
||||
|
|
|
|||
Loading…
Reference in New Issue