def test_construct_nlri_2(self): nlri_list = [ '2001:3232::1/128', '::2001:3232:1:0/64', '2001:4837:1632::2/127' ] value_hex = IPv6Unicast.construct(nlri_list) value_hoped = b'\x80\x20\x01\x32\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x40\x20\x01\x32' \ b'\x32\x00\x01\x00\x00\x7f\x20\x01\x48\x37\x16\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02' self.assertEqual(value_hoped, value_hex)
def test_construct_nlri(self): nlri_list = [ '::2001:db8:1:2/64', '::2001:db8:1:1/64', '::2001:db8:1:0/64' ] value_hex = IPv6Unicast.construct(nlri_list) value_hoped = b'\x40\x20\x01\x0d\xb8\x00\x01\x00\x02\x40\x20\x01\x0d\xb8\x00\x01\x00\x01\x40\x20\x01\x0d' \ b'\xb8\x00\x01\x00\x00' self.assertEqual(value_hoped, value_hex)
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 pass 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_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 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), 'withdraw': [] """ afi, safi = value['afi_safi'] if afi == afn.AFNUM_INET: if safi == safn.SAFNUM_LAB_VPNUNICAST: # MPLS VPN pass elif safi == safn.SAFNUM_FSPEC_RULE: try: nlri = IPv4FlowSpec().construct(value=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 pass 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 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 = 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 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), '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 test_construct_nlri_2(self): nlri_list = ['2001:3232::1/128', '::2001:3232:1:0/64', '2001:4837:1632::2/127'] value_hex = IPv6Unicast.construct(nlri_list) value_hoped = b'\x80\x20\x01\x32\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x40\x20\x01\x32' \ b'\x32\x00\x01\x00\x00\x7f\x20\x01\x48\x37\x16\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02' self.assertEqual(value_hoped, value_hex)
def test_construct_nlri(self): nlri_list = ['::2001:db8:1:2/64', '::2001:db8:1:1/64', '::2001:db8:1:0/64'] value_hex = IPv6Unicast.construct(nlri_list) value_hoped = b'\x40\x20\x01\x0d\xb8\x00\x01\x00\x02\x40\x20\x01\x0d\xb8\x00\x01\x00\x01\x40\x20\x01\x0d' \ b'\xb8\x00\x01\x00\x00' self.assertEqual(value_hoped, value_hex)