class LLDPDUEndOfLLDPDU(LLDPDU):
"""
ieee 802.1ab-2016 - sec. 8.5.1 / p. 26
"""
fields_desc = [
BitEnumField('_type', 0x00, 7, LLDPDU.TYPES),
BitField('_length', 0x00, 9),
]
def extract_padding(self, s):
return '', s
def _check(self):
"""
run layer specific checks
"""
if conf.contribs['LLDP'].strict_mode() and self._length != 0:
raise LLDPInvalidLengthField('length must be 0 - got '
'{}'.format(self._length))
def post_dissect(self, s):
self._check()
return super(LLDPDUEndOfLLDPDU, self).post_dissect(s)
def do_build(self):
self._check()
return super(LLDPDUEndOfLLDPDU, self).do_build()
class LLDPDUTimeToLive(LLDPDU):
"""
ieee 802.1ab-2016 - sec. 8.5.4 / p. 29
"""
fields_desc = [
BitEnumField('_type', 0x03, 7, LLDPDU.TYPES),
BitField('_length', 0x02, 9),
ShortField('ttl', 20)
]
def _check(self):
"""
run layer specific checks
"""
if conf.contribs['LLDP'].strict_mode() and self._length != 2:
raise LLDPInvalidLengthField('length must be 2 - got '
'{}'.format(self._length))
def post_dissect(self, s):
self._check()
return super(LLDPDUTimeToLive, self).post_dissect(s)
def do_build(self):
self._check()
return super(LLDPDUTimeToLive, self).do_build()
class LLDPDUManagementAddress(LLDPDU):
"""
ieee 802.1ab-2016 - sec. 8.5.9 / p. 32
currently only 0x00..0x1e are used by standards, no way to
use anything > 0xff as management address subtype is only
one octet wide
see https://www.iana.org/assignments/
address-family-numbers/address-family-numbers.xhtml
"""
IANA_ADDRESS_FAMILY_NUMBERS = {
0x00: 'other',
0x01: 'IPv4',
0x02: 'IPv6',
0x03: 'NSAP',
0x04: 'HDLC',
0x05: 'BBN',
0x06: '802',
0x07: 'E.163',
0x08: 'E.164',
0x09: 'F.69',
0x0a: 'X.121',
0x0b: 'IPX',
0x0c: 'Appletalk',
0x0d: 'Decnet IV',
0x0e: 'Banyan Vines',
0x0f: 'E.164 with NSAP',
0x10: 'DNS',
0x11: 'Distinguished Name',
0x12: 'AS Number',
0x13: 'XTP over IPv4',
0x14: 'XTP over IPv6',
0x15: 'XTP native mode XTP',
0x16: 'Fiber Channel World-Wide Port Name',
0x17: 'Fiber Channel World-Wide Node Name',
0x18: 'GWID',
0x19: 'AFI for L2VPN',
0x1a: 'MPLS-TP Section Endpoint ID',
0x1b: 'MPLS-TP LSP Endpoint ID',
0x1c: 'MPLS-TP Pseudowire Endpoint ID',
0x1d: 'MT IP Multi-Topology IPv4',
0x1e: 'MT IP Multi-Topology IPv6'
}
SUBTYPE_MANAGEMENT_ADDRESS_OTHER = 0x00
SUBTYPE_MANAGEMENT_ADDRESS_IPV4 = 0x01
SUBTYPE_MANAGEMENT_ADDRESS_IPV6 = 0x02
SUBTYPE_MANAGEMENT_ADDRESS_NSAP = 0x03
SUBTYPE_MANAGEMENT_ADDRESS_HDLC = 0x04
SUBTYPE_MANAGEMENT_ADDRESS_BBN = 0x05
SUBTYPE_MANAGEMENT_ADDRESS_802 = 0x06
SUBTYPE_MANAGEMENT_ADDRESS_E_163 = 0x07
SUBTYPE_MANAGEMENT_ADDRESS_E_164 = 0x08
SUBTYPE_MANAGEMENT_ADDRESS_F_69 = 0x09
SUBTYPE_MANAGEMENT_ADDRESS_X_121 = 0x0A
SUBTYPE_MANAGEMENT_ADDRESS_IPX = 0x0B
SUBTYPE_MANAGEMENT_ADDRESS_APPLETALK = 0x0C
SUBTYPE_MANAGEMENT_ADDRESS_DECNET_IV = 0x0D
SUBTYPE_MANAGEMENT_ADDRESS_BANYAN_VINES = 0x0E
SUBTYPE_MANAGEMENT_ADDRESS_E_164_WITH_NSAP = 0x0F
SUBTYPE_MANAGEMENT_ADDRESS_DNS = 0x10
SUBTYPE_MANAGEMENT_ADDRESS_DISTINGUISHED_NAME = 0x11
SUBTYPE_MANAGEMENT_ADDRESS_AS_NUMBER = 0x12
SUBTYPE_MANAGEMENT_ADDRESS_XTP_OVER_IPV4 = 0x13
SUBTYPE_MANAGEMENT_ADDRESS_XTP_OVER_IPV6 = 0x14
SUBTYPE_MANAGEMENT_ADDRESS_XTP_NATIVE_MODE_XTP = 0x15
SUBTYPE_MANAGEMENT_ADDRESS_FIBER_CHANNEL_WORLD_WIDE_PORT_NAME = 0x16
SUBTYPE_MANAGEMENT_ADDRESS_FIBER_CHANNEL_WORLD_WIDE_NODE_NAME = 0x17
SUBTYPE_MANAGEMENT_ADDRESS_GWID = 0x18
SUBTYPE_MANAGEMENT_ADDRESS_AFI_FOR_L2VPN = 0x19
SUBTYPE_MANAGEMENT_ADDRESS_MPLS_TP_SECTION_ENDPOINT_ID = 0x1A
SUBTYPE_MANAGEMENT_ADDRESS_MPLS_TP_LSP_ENDPOINT_ID = 0x1B
SUBTYPE_MANAGEMENT_ADDRESS_MPLS_TP_PSEUDOWIRE_ENDPOINT_ID = 0x1C
SUBTYPE_MANAGEMENT_ADDRESS_MT_IP_MULTI_TOPOLOGY_IPV4 = 0x1D
SUBTYPE_MANAGEMENT_ADDRESS_MT_IP_MULTI_TOPOLOGY_IPV6 = 0x1E
INTERFACE_NUMBERING_SUBTYPES = {
0x01: 'unknown',
0x02: 'ifIndex',
0x03: 'system port number'
}
SUBTYPE_INTERFACE_NUMBER_UNKNOWN = 0x01
SUBTYPE_INTERFACE_NUMBER_IF_INDEX = 0x02
SUBTYPE_INTERFACE_NUMBER_SYSTEM_PORT_NUMBER = 0x03
'''
Note - calculation of _length field:
_length = 1@_management_address_string_length +
1@management_address_subtype +
management_address.len +
1@interface_numbering_subtype +
4@interface_number +
1@_oid_string_length +
object_id.len
'''
fields_desc = [
BitEnumField('_type', 0x08, 7, LLDPDU.TYPES),
BitFieldLenField('_length',
None,
9,
length_of='management_address',
adjust=lambda pkt, x: 8 + len(pkt.management_address)
+ len(pkt.object_id)),
BitFieldLenField(
'_management_address_string_length',
None,
8,
length_of='management_address',
adjust=lambda pkt, x: len(pkt.management_address) + 1),
ByteEnumField('management_address_subtype', 0x00,
IANA_ADDRESS_FAMILY_NUMBERS),
XStrLenField(
'management_address',
'',
length_from=lambda pkt: pkt._management_address_string_length - 1),
ByteEnumField('interface_numbering_subtype',
SUBTYPE_INTERFACE_NUMBER_UNKNOWN,
INTERFACE_NUMBERING_SUBTYPES),
BitField('interface_number', 0, 32),
BitFieldLenField('_oid_string_length', None, 8, length_of='object_id'),
XStrLenField('object_id',
'',
length_from=lambda pkt: pkt._oid_string_length),
]
def _check(self):
"""
run layer specific checks
"""
if conf.contribs['LLDP'].strict_mode():
management_address_len = len(self.management_address)
if management_address_len == 0 or management_address_len > 31:
raise LLDPInvalidLengthField(
'management address must be 1..31 characters long - '
'got string of size {}'.format(management_address_len))
def post_dissect(self, s):
self._check()
return super(LLDPDUManagementAddress, self).post_dissect(s)
def do_build(self):
self._check()
return super(LLDPDUManagementAddress, self).do_build()
class LLDPDUSystemCapabilities(LLDPDU):
"""
ieee 802.1ab-2016 - sec. 8.5.8 / p. 31
"""
fields_desc = [
BitEnumField('_type', 0x07, 7, LLDPDU.TYPES),
BitFieldLenField('_length', 4, 9),
BitField('reserved_5_available', 0, 1),
BitField('reserved_4_available', 0, 1),
BitField('reserved_3_available', 0, 1),
BitField('reserved_2_available', 0, 1),
BitField('reserved_1_available', 0, 1),
BitField('two_port_mac_relay_available', 0, 1),
BitField('s_vlan_component_available', 0, 1),
BitField('c_vlan_component_available', 0, 1),
BitField('station_only_available', 0, 1),
BitField('docsis_cable_device_available', 0, 1),
BitField('telephone_available', 0, 1),
BitField('router_available', 0, 1),
BitField('wlan_access_point_available', 0, 1),
BitField('mac_bridge_available', 0, 1),
BitField('repeater_available', 0, 1),
BitField('other_available', 0, 1),
BitField('reserved_5_enabled', 0, 1),
BitField('reserved_4_enabled', 0, 1),
BitField('reserved_3_enabled', 0, 1),
BitField('reserved_2_enabled', 0, 1),
BitField('reserved_1_enabled', 0, 1),
BitField('two_port_mac_relay_enabled', 0, 1),
BitField('s_vlan_component_enabled', 0, 1),
BitField('c_vlan_component_enabled', 0, 1),
BitField('station_only_enabled', 0, 1),
BitField('docsis_cable_device_enabled', 0, 1),
BitField('telephone_enabled', 0, 1),
BitField('router_enabled', 0, 1),
BitField('wlan_access_point_enabled', 0, 1),
BitField('mac_bridge_enabled', 0, 1),
BitField('repeater_enabled', 0, 1),
BitField('other_enabled', 0, 1),
]
def _check(self):
"""
run layer specific checks
"""
if conf.contribs['LLDP'].strict_mode() and self._length != 4:
raise LLDPInvalidLengthField('length must be 4 - got '
'{}'.format(self._length))
def post_dissect(self, s):
self._check()
return super(LLDPDUSystemCapabilities, self).post_dissect(s)
def do_build(self):
self._check()
return super(LLDPDUSystemCapabilities, self).do_build()