def test_construct_2(self): nlri_hex = b'\x78\x00\x01\x91\x00\x00\x00\x64\x00\x00\x00\x64\xaa\x00\x00\x00' nlri_list = [{ 'label': [25], 'rd': '100:100', 'prefix': '170.0.0.0/32' }] self.assertEqual(nlri_hex, IPv4MPLSVPN.construct(nlri_list))
def test_construct_1(self): nlri_hex = b'\x76\x00\x01\x41\x00\x00\xfd\xea\x00\x00\x00\x01\x17\x00\x00\x00' nlri_list = [{'label': [20], 'rd': '65002:1', 'prefix': '23.0.0.0/30'}] self.assertEqual(nlri_list, IPv4MPLSVPN.parse(nlri_hex)) self.assertEqual( nlri_hex, IPv4MPLSVPN.construct(nlri_list), )
def test_construct_multi(self): nlri_list = [{ 'label': [25], 'rd': '100:100', 'prefix': '170.0.0.0/32' }, { 'label': [20], 'rd': '65002:1', 'prefix': '23.0.0.0/30' }] self.assertEqual(nlri_list, IPv4MPLSVPN.parse(IPv4MPLSVPN.construct(nlri_list)))
def construct(cls, value): """Construct a attribute :param value: python dictionary {'afi_safi': (1,128), 'nexthop': {}, 'nlri': [] """ afi, safi = value['afi_safi'] if afi == afn.AFNUM_INET: if safi == safn.SAFNUM_LAB_VPNUNICAST: # MPLS VPN nexthop_hex = cls.construct_mpls_vpn_nexthop(value['nexthop']) nlri_hex = IPv4MPLSVPN.construct(value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) +\ struct.pack('!B', len(nexthop_hex)) + nexthop_hex + b'\x00' + nlri_hex return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value elif safi == safn.SAFNUM_FSPEC_RULE: # BGP Flow spec try: try: nexthop = netaddr.IPAddress(value['nexthop']).packed except netaddr.core.AddrFormatError: nexthop = '' nlri = IPv4FlowSpec.construct(value=value['nlri']) if nlri: attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + \ struct.pack('!B', len(nexthop)) + nexthop + b'\x00' + nlri return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value except Exception as e: raise excep.ConstructAttributeFailed( reason='failed to construct attributes: %s' % e, data=value) else: raise excep.ConstructAttributeFailed( reason='unsupport this sub address family', data=value) # ipv6 unicast elif afi == afn.AFNUM_INET6: if safi == safn.SAFNUM_LAB_VPNUNICAST: # MPLS VPN nexthop_hex = cls.construct_mpls_vpn_nexthop(value['nexthop']) nlri_hex = IPv6MPLSVPN.construct(value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) +\ struct.pack('!B', len(nexthop_hex)) + nexthop_hex + b'\x00' + nlri_hex return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value elif safi == safn.SAFNUM_UNICAST: nexthop_len = 16 nexthop_bin = netaddr.IPAddress(value['nexthop']).packed if value.get('linklocal_nexthop'): nexthop_len *= 2 nexthop_bin += netaddr.IPAddress( value['linklocal_nexthop']).packed nlri_bin = IPv6Unicast.construct(nlri_list=value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + struct.pack('!B', nexthop_len) + \ nexthop_bin + b'\x00' + nlri_bin return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID)\ + struct.pack('!B', len(attr_value)) + attr_value # for l2vpn elif afi == afn.AFNUM_L2VPN: if safi == safn.SAFNUM_EVPN: nexthop_bin = netaddr.IPAddress(value['nexthop']).packed nlri_bin = EVPN.construct(nlri_list=value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + struct.pack('!B', len(nexthop_bin)) + \ nexthop_bin + b'\x00' + nlri_bin return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID)\ + struct.pack('!B', len(attr_value)) + attr_value else: raise excep.ConstructAttributeFailed( reason='unsupport this sub address family', data=value)
def test_construct_multi(self): nlri_list = [ {'label': [25], 'rd': '100:100', 'prefix': '170.0.0.0/32'}, {'label': [20], 'rd': '65002:1', 'prefix': '23.0.0.0/30'} ] self.assertEqual(nlri_list, IPv4MPLSVPN.parse(IPv4MPLSVPN.construct(nlri_list)))
def test_construct_2(self): nlri_hex = b'\x78\x00\x01\x91\x00\x00\x00\x64\x00\x00\x00\x64\xaa\x00\x00\x00' nlri_list = [{'label': [25], 'rd': '100:100', 'prefix': '170.0.0.0/32'}] self.assertEqual(nlri_hex, IPv4MPLSVPN.construct(nlri_list))
def test_construct_1(self): nlri_hex = b'\x76\x00\x01\x41\x00\x00\xfd\xea\x00\x00\x00\x01\x17\x00\x00\x00' nlri_list = [{'label': [20], 'rd': '65002:1', 'prefix': '23.0.0.0/30'}] self.assertEqual(nlri_list, IPv4MPLSVPN.parse(nlri_hex)) self.assertEqual(nlri_hex, IPv4MPLSVPN.construct(nlri_list), )
def construct(cls, value): """Construct a attribute :param value: python dictionary {'afi_safi': (1,128), 'withdraw': [] """ afi, safi = value['afi_safi'] if afi == afn.AFNUM_INET: if safi == safn.SAFNUM_LAB_VPNUNICAST: # MPLS VPN nlri = IPv4MPLSVPN.construct(value['withdraw'], iswithdraw=True) if nlri: attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + nlri return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value else: return None elif safi == safn.SAFNUM_FSPEC_RULE: try: nlri_list = value.get('withdraw') or [] if not nlri_list: return None nlri_hex = b'' for nlri in nlri_list: nlri_hex += IPv4FlowSpec.construct(value=nlri) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + nlri_hex return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value except Exception: raise excep.ConstructAttributeFailed( reason='failed to construct attributes', data=value ) else: raise excep.ConstructAttributeFailed( reason='unsupport this sub address family', data=value) elif afi == afn.AFNUM_INET6: if safi == safn.SAFNUM_UNICAST: nlri = IPv6Unicast.construct(nlri_list=value['withdraw']) if nlri: attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + nlri return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value elif safi == safn.SAFNUM_LAB_VPNUNICAST: nlri = IPv6MPLSVPN.construct(value=value['withdraw'], iswithdraw=True) if nlri: attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + nlri return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value else: return None # for l2vpn elif afi == afn.AFNUM_L2VPN: # for evpn if safi == safn.SAFNUM_EVPN: nlri = EVPN.construct(nlri_list=value['withdraw']) if nlri: attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + nlri return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value else: return None else: raise excep.ConstructAttributeFailed( reason='unsupport this sub address family', data=value)
def construct(cls, value): """Construct a attribute :param value: python dictionary {'afi_safi': (1,128), 'nexthop': {}, 'nlri': [] """ afi, safi = value['afi_safi'] if afi == afn.AFNUM_INET: if safi == safn.SAFNUM_LAB_VPNUNICAST: # MPLS VPN nexthop_hex = cls.construct_mpls_vpn_nexthop(value['nexthop']) nlri_hex = IPv4MPLSVPN.construct(value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) +\ struct.pack('!B', len(nexthop_hex)) + nexthop_hex + b'\x00' + nlri_hex return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value elif safi == safn.SAFNUM_FSPEC_RULE: # BGP Flow spec try: try: nexthop = netaddr.IPAddress(value['nexthop']).packed except netaddr.core.AddrFormatError: nexthop = '' nlri_hex = b'' for nlri in value['nlri']: nlri_hex += IPv4FlowSpec.construct(value=nlri) if nlri_hex: attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + \ struct.pack('!B', len(nexthop)) + nexthop + b'\x00' + nlri_hex return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value except Exception as e: raise excep.ConstructAttributeFailed( reason='failed to construct attributes: %s' % e, data=value ) else: raise excep.ConstructAttributeFailed( reason='unsupport this sub address family', data=value) # ipv6 unicast elif afi == afn.AFNUM_INET6: if safi == safn.SAFNUM_LAB_VPNUNICAST: # MPLS VPN nexthop_hex = cls.construct_mpls_vpn_nexthop(value['nexthop']) nlri_hex = IPv6MPLSVPN.construct(value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) +\ struct.pack('!B', len(nexthop_hex)) + nexthop_hex + b'\x00' + nlri_hex return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID) \ + struct.pack('!B', len(attr_value)) + attr_value elif safi == safn.SAFNUM_UNICAST: nexthop_len = 16 nexthop_bin = netaddr.IPAddress(value['nexthop']).packed if value.get('linklocal_nexthop'): nexthop_len *= 2 nexthop_bin += netaddr.IPAddress(value['linklocal_nexthop']).packed nlri_bin = IPv6Unicast.construct(nlri_list=value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + struct.pack('!B', nexthop_len) + \ nexthop_bin + b'\x00' + nlri_bin return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID)\ + struct.pack('!B', len(attr_value)) + attr_value # for l2vpn elif afi == afn.AFNUM_L2VPN: if safi == safn.SAFNUM_EVPN: nexthop_bin = netaddr.IPAddress(value['nexthop']).packed nlri_bin = EVPN.construct(nlri_list=value['nlri']) attr_value = struct.pack('!H', afi) + struct.pack('!B', safi) + struct.pack('!B', len(nexthop_bin)) + \ nexthop_bin + b'\x00' + nlri_bin return struct.pack('!B', cls.FLAG) + struct.pack('!B', cls.ID)\ + struct.pack('!B', len(attr_value)) + attr_value else: raise excep.ConstructAttributeFailed( reason='unsupport this sub address family', data=value)