#! /usr/bin/env python
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#
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# scapy.contrib.description = LLDP
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# scapy.contrib.status = loads
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"""
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LLDP - Link Layer Discovery Protocol
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:author: Thomas Tannhaeuser, hecke@naberius.de
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:license: GPLv2
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This module is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This module is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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:description:
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This module provides Scapy layers for the LLDP protocol.
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normative references:
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- IEEE 802.1AB 2016 - LLDP protocol, topology and MIB description
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:TODO:
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- organization specific TLV e.g. ProfiNet
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:NOTES:
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- you can find the layer configuration options at the end of this file
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- default configuration enforces standard conform
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- frame structure
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(ChassisIDTLV/PortIDTLV/TimeToLiveTLV/.../EndofLLDPDUTLV)
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- multiplicity of TLVs (if given by the standard)
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- min sizes of strings used by the TLVs
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- conf.contribs['LLDP'].strict_mode_disable() -> disable strict mode
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- strict mode = True => conf.debug_dissector = True
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"""
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from scapy.config import conf
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from scapy.layers.dot11 import Packet
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from scapy.layers.l2 import Ether, Dot1Q, bind_layers, \
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BitField, StrLenField, ByteEnumField, BitEnumField, \
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BitFieldLenField, ShortField, Padding, Scapy_Exception, \
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XStrLenField
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from scapy.modules.six.moves import range
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from scapy.data import ETHER_TYPES
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from scapy.compat import orb, raw
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LLDP_NEAREST_BRIDGE_MAC = '01:80:c2:00:00:0e'
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LLDP_NEAREST_NON_TPMR_BRIDGE_MAC = '01:80:c2:00:00:03'
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LLDP_NEAREST_CUSTOMER_BRIDGE_MAC = '01:80:c2:00:00:00'
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LLDP_ETHER_TYPE = 0x88cc
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ETHER_TYPES['LLDP'] = LLDP_ETHER_TYPE
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class LLDPInvalidFrameStructure(Scapy_Exception):
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"""
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basic frame structure not standard conform
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(missing TLV, invalid order or multiplicity)
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"""
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pass
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class LLDPInvalidLastLayerException(Scapy_Exception):
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"""
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in strict mode, last layer in frame must be of type LLDPDUEndOfLLDPDU
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"""
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pass
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class LLDPMissingLowerLayer(Scapy_Exception):
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"""
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first layer below first LLDPDU must be Ethernet or Dot1q
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"""
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pass
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class LLDPInvalidTLVCount(Scapy_Exception):
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"""
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invalid number of entries for a specific TLV type
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"""
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pass
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class LLDPInvalidLengthField(Scapy_Exception):
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"""
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invalid value of length field
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"""
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pass
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class LLDPDU(Packet):
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"""
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base class for all LLDP data units
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"""
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TYPES = {
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0x00: 'end of LLDPDU',
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0x01: 'chassis id',
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0x02: 'port id',
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0x03: 'time to live',
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0x04: 'port description',
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0x05: 'system name',
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0x06: 'system description',
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0x07: 'system capabilities',
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0x08: 'management address',
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range(0x09, 0x7e): 'reserved - future standardization',
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127: 'organisation specific TLV'
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}
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DOT1Q_HEADER_LEN = 4
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ETHER_HEADER_LEN = 14
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ETHER_FSC_LEN = 4
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ETHER_FRAME_MIN_LEN = 64
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LAYER_STACK = []
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LAYER_MULTIPLICITIES = {}
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def guess_payload_class(self, payload):
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# type is a 7-bit bitfield spanning bits 1..7 -> div 2
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lldpdu_tlv_type = orb(payload[0]) // 2
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return LLDPDU_CLASS_TYPES[lldpdu_tlv_type]
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@staticmethod
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def _dot1q_headers_size(layer):
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"""
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calculate size of lower dot1q layers (if present)
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:param layer: the layer to start at
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:return: size of vlan headers, layer below lowest vlan header
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"""
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vlan_headers_size = 0
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under_layer = layer
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while under_layer and isinstance(under_layer, Dot1Q):
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vlan_headers_size += LLDPDU.DOT1Q_HEADER_LEN
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under_layer = under_layer.underlayer
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return vlan_headers_size, under_layer
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def post_build(self, pkt, pay):
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last_layer = not pay
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if last_layer and conf.contribs['LLDP'].strict_mode() and \
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type(self).__name__ != LLDPDUEndOfLLDPDU.__name__:
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raise LLDPInvalidLastLayerException('Last layer must be instance '
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'of LLDPDUEndOfLLDPDU - '
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'got {}'.
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format(type(self).__name__))
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under_layer = self.underlayer
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if under_layer is None:
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if conf.contribs['LLDP'].strict_mode():
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raise LLDPMissingLowerLayer('No lower layer (Ethernet '
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'or Dot1Q) provided.')
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else:
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return pkt + pay
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if isinstance(under_layer, LLDPDU):
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return pkt + pay
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frame_size, under_layer = LLDPDU._dot1q_headers_size(under_layer)
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if not under_layer or not isinstance(under_layer, Ether):
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if conf.contribs['LLDP'].strict_mode():
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raise LLDPMissingLowerLayer('No Ethernet layer provided.')
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else:
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return pkt + pay
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frame_size += LLDPDU.ETHER_HEADER_LEN
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frame_size += len(pkt) + len(pay) + LLDPDU.ETHER_FSC_LEN
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if frame_size < LLDPDU.ETHER_FRAME_MIN_LEN:
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return pkt + pay + b'\x00' * (LLDPDU.ETHER_FRAME_MIN_LEN - frame_size)
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return pkt + pay
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@staticmethod
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def _frame_structure_check(structure_description):
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"""
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check if the structure of the frame is conform to the basic
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frame structure defined by the standard
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:param structure_description: string-list reflecting LLDP-msg structure
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"""
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standard_frame_structure = [LLDPDUChassisID.__name__,
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LLDPDUPortID.__name__,
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LLDPDUTimeToLive.__name__,
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'<...>',
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LLDPDUEndOfLLDPDU.__name__]
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if len(structure_description) < 4:
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raise LLDPInvalidFrameStructure(
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'Invalid frame structure.\ngot: {}\nexpected: '
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'{}'.format(' '.join(structure_description),
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' '.join(standard_frame_structure)))
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for idx, layer_name in enumerate(standard_frame_structure):
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if layer_name == '<...>':
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break
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if layer_name != structure_description[idx]:
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raise LLDPInvalidFrameStructure(
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'Invalid frame structure.\ngot: {}\nexpected: '
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'{}'.format(' '.join(structure_description),
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' '.join(standard_frame_structure)))
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if structure_description[-1] != standard_frame_structure[-1]:
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raise LLDPInvalidFrameStructure(
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'Invalid frame structure.\ngot: {}\nexpected: '
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'{}'.format(' '.join(structure_description),
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' '.join(standard_frame_structure)))
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@staticmethod
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def _tlv_multiplicities_check(tlv_type_count):
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"""
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check if multiplicity of present TLVs conforms to the standard
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:param tlv_type_count: dict containing counte-per-TLV
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"""
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# * : 0..n, 1 : one and only one.
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standard_multiplicities = {
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LLDPDUEndOfLLDPDU.__name__: 1,
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LLDPDUChassisID.__name__: 1,
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LLDPDUPortID.__name__: 1,
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LLDPDUTimeToLive.__name__: 1,
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LLDPDUPortDescription: '*',
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LLDPDUSystemName: '*',
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LLDPDUSystemDescription: '*',
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LLDPDUSystemCapabilities: '*',
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LLDPDUManagementAddress: '*'
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}
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for tlv_type_name in standard_multiplicities:
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standard_tlv_multiplicity = \
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standard_multiplicities[tlv_type_name]
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if standard_tlv_multiplicity == '*':
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continue
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try:
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if tlv_type_count[tlv_type_name] != standard_tlv_multiplicity:
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raise LLDPInvalidTLVCount(
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'Invalid number of entries for TLV type '
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'{} - expected {} entries, got '
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'{}'.format(tlv_type_name,
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standard_tlv_multiplicity,
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tlv_type_count[tlv_type_name]))
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except KeyError:
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raise LLDPInvalidTLVCount('Missing TLV layer of type '
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'{}.'.format(tlv_type_name))
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def pre_dissect(self, s):
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if conf.contribs['LLDP'].strict_mode():
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if self.__class__.__name__ == 'LLDPDU':
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LLDPDU.LAYER_STACK = []
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LLDPDU.LAYER_MULTIPLICITIES = {}
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else:
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LLDPDU.LAYER_STACK.append(self.__class__.__name__)
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try:
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LLDPDU.LAYER_MULTIPLICITIES[self.__class__.__name__] += 1
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except KeyError:
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LLDPDU.LAYER_MULTIPLICITIES[self.__class__.__name__] = 1
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return s
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def dissection_done(self, pkt):
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if self.__class__.__name__ == 'LLDPDU' and \
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conf.contribs['LLDP'].strict_mode():
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LLDPDU._frame_structure_check(LLDPDU.LAYER_STACK)
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LLDPDU._tlv_multiplicities_check(LLDPDU.LAYER_MULTIPLICITIES)
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super(LLDPDU, self).dissection_done(pkt)
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class LLDPDUChassisID(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.2 / p. 26
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"""
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LLDP_CHASSIS_ID_TLV_SUBTYPES = {
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0x00: 'reserved',
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0x01: 'chassis component',
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0x02: 'interface alias',
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0x03: 'port component',
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0x04: 'MAC address',
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0x05: 'network address',
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0x06: 'interface name',
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0x07: 'locally assigned',
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range(0x08, 0xff): 'reserved'
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}
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SUBTYPE_RESERVED = 0x00
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SUBTYPE_CHASSIS_COMPONENT = 0x01
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SUBTYPE_INTERFACE_ALIAS = 0x02
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SUBTYPE_PORT_COMPONENT = 0x03
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SUBTYPE_MAC_ADDRESS = 0x04
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SUBTYPE_NETWORK_ADDRESS = 0x05
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SUBTYPE_INTERFACE_NAME = 0x06
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SUBTYPE_LOCALLY_ASSIGNED = 0x07
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fields_desc = [
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BitEnumField('_type', 0x01, 7, LLDPDU.TYPES),
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BitFieldLenField('_length', None, 9, length_of='id',
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adjust=lambda pkt, x: len(pkt.id) + 1),
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ByteEnumField('subtype', 0x00, LLDP_CHASSIS_ID_TLV_SUBTYPES),
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XStrLenField('id', '', length_from=lambda pkt: pkt._length - 1)
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]
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def _check(self):
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"""
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run layer specific checks
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"""
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if conf.contribs['LLDP'].strict_mode() and not self.id:
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raise LLDPInvalidLengthField('id must be >= 1 characters long')
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def post_dissect(self, s):
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self._check()
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return super(LLDPDUChassisID, self).post_dissect(s)
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def do_build(self):
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self._check()
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return super(LLDPDUChassisID, self).do_build()
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class LLDPDUPortID(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.3 / p. 26
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"""
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LLDP_PORT_ID_TLV_SUBTYPES = {
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0x00: 'reserved',
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0x01: 'interface alias',
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0x02: 'port component',
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0x03: 'MAC address',
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0x04: 'network address',
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0x05: 'interface name',
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0x06: 'agent circuit ID',
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0x07: 'locally assigned',
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range(0x08, 0xff): 'reserved'
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}
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SUBTYPE_RESERVED = 0x00
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SUBTYPE_INTERFACE_ALIAS = 0x01
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SUBTYPE_PORT_COMPONENT = 0x02
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SUBTYPE_MAC_ADDRESS = 0x03
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SUBTYPE_NETWORK_ADDRESS = 0x04
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SUBTYPE_INTERFACE_NAME = 0x05
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SUBTYPE_AGENT_CIRCUIT_ID = 0x06
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SUBTYPE_LOCALLY_ASSIGNED = 0x07
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fields_desc = [
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BitEnumField('_type', 0x02, 7, LLDPDU.TYPES),
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BitFieldLenField('_length', None, 9, length_of='id',
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adjust=lambda pkt, x: len(pkt.id) + 1),
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ByteEnumField('subtype', 0x00, LLDP_PORT_ID_TLV_SUBTYPES),
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StrLenField('id', '', length_from=lambda pkt: pkt._length - 1)
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]
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def _check(self):
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"""
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run layer specific checks
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"""
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if conf.contribs['LLDP'].strict_mode() and not self.id:
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raise LLDPInvalidLengthField('id must be >= 1 characters long')
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def post_dissect(self, s):
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self._check()
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return super(LLDPDUPortID, self).post_dissect(s)
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def do_build(self):
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self._check()
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return super(LLDPDUPortID, self).do_build()
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class LLDPDUTimeToLive(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.4 / p. 29
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"""
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fields_desc = [
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BitEnumField('_type', 0x03, 7, LLDPDU.TYPES),
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BitField('_length', 0x02, 9),
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ShortField('ttl', 20)
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]
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def _check(self):
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"""
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run layer specific checks
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"""
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if conf.contribs['LLDP'].strict_mode() and self._length != 2:
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raise LLDPInvalidLengthField('length must be 2 - got '
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'{}'.format(self._length))
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def post_dissect(self, s):
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self._check()
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return super(LLDPDUTimeToLive, self).post_dissect(s)
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def do_build(self):
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self._check()
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return super(LLDPDUTimeToLive, self).do_build()
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class LLDPDUEndOfLLDPDU(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.1 / p. 26
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"""
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fields_desc = [
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BitEnumField('_type', 0x00, 7, LLDPDU.TYPES),
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BitField('_length', 0x00, 9),
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]
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def extract_padding(self, s):
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return '', s
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def _check(self):
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"""
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run layer specific checks
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"""
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if conf.contribs['LLDP'].strict_mode() and self._length != 0:
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raise LLDPInvalidLengthField('length must be 0 - got '
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'{}'.format(self._length))
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def post_dissect(self, s):
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self._check()
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return super(LLDPDUEndOfLLDPDU, self).post_dissect(s)
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def do_build(self):
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self._check()
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return super(LLDPDUEndOfLLDPDU, self).do_build()
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class LLDPDUPortDescription(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.5 / p. 29
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"""
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fields_desc = [
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BitEnumField('_type', 0x04, 7, LLDPDU.TYPES),
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BitFieldLenField('_length', None, 9, length_of='description'),
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StrLenField('description', '', length_from=lambda pkt: pkt._length)
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]
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class LLDPDUSystemName(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.6 / p. 30
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"""
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fields_desc = [
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BitEnumField('_type', 0x05, 7, LLDPDU.TYPES),
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BitFieldLenField('_length', None, 9, length_of='system_name'),
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StrLenField('system_name', '', length_from=lambda pkt: pkt._length)
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]
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class LLDPDUSystemDescription(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.7 / p. 31
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"""
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fields_desc = [
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BitEnumField('_type', 0x06, 7, LLDPDU.TYPES),
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BitFieldLenField('_length', None, 9, length_of='description'),
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StrLenField('description', '', length_from=lambda pkt: pkt._length)
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]
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class LLDPDUSystemCapabilities(LLDPDU):
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"""
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ieee 802.1ab-2016 - sec. 8.5.8 / p. 31
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"""
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fields_desc = [
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BitEnumField('_type', 0x07, 7, LLDPDU.TYPES),
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BitFieldLenField('_length', 4, 9),
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BitField('reserved_5_available', 0, 1),
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BitField('reserved_4_available', 0, 1),
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BitField('reserved_3_available', 0, 1),
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BitField('reserved_2_available', 0, 1),
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BitField('reserved_1_available', 0, 1),
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BitField('two_port_mac_relay_available', 0, 1),
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BitField('s_vlan_component_available', 0, 1),
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BitField('c_vlan_component_available', 0, 1),
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BitField('station_only_available', 0, 1),
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BitField('docsis_cable_device_available', 0, 1),
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BitField('telephone_available', 0, 1),
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BitField('router_available', 0, 1),
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BitField('wlan_access_point_available', 0, 1),
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BitField('mac_bridge_available', 0, 1),
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BitField('repeater_available', 0, 1),
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BitField('other_available', 0, 1),
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BitField('reserved_5_enabled', 0, 1),
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BitField('reserved_4_enabled', 0, 1),
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BitField('reserved_3_enabled', 0, 1),
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BitField('reserved_2_enabled', 0, 1),
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BitField('reserved_1_enabled', 0, 1),
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BitField('two_port_mac_relay_enabled', 0, 1),
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BitField('s_vlan_component_enabled', 0, 1),
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BitField('c_vlan_component_enabled', 0, 1),
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BitField('station_only_enabled', 0, 1),
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BitField('docsis_cable_device_enabled', 0, 1),
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BitField('telephone_enabled', 0, 1),
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BitField('router_enabled', 0, 1),
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BitField('wlan_access_point_enabled', 0, 1),
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BitField('mac_bridge_enabled', 0, 1),
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BitField('repeater_enabled', 0, 1),
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BitField('other_enabled', 0, 1),
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]
|
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def _check(self):
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"""
|
run layer specific checks
|
"""
|
if conf.contribs['LLDP'].strict_mode() and self._length != 4:
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raise LLDPInvalidLengthField('length must be 4 - got '
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'{}'.format(self._length))
|
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def post_dissect(self, s):
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self._check()
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return super(LLDPDUSystemCapabilities, self).post_dissect(s)
|
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def do_build(self):
|
self._check()
|
return super(LLDPDUSystemCapabilities, self).do_build()
|
|
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class LLDPDUManagementAddress(LLDPDU):
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"""
|
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',
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0x08: 'E.164',
|
0x09: 'F.69',
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0x0a: 'X.121',
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0x0b: 'IPX',
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0x0c: 'Appletalk',
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0x0d: 'Decnet IV',
|
0x0e: 'Banyan Vines',
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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()
|
|
LLDPDU_CLASS_TYPES = {
|
0x00: LLDPDUEndOfLLDPDU,
|
0x01: LLDPDUChassisID,
|
0x02: LLDPDUPortID,
|
0x03: LLDPDUTimeToLive,
|
0x04: LLDPDUPortDescription,
|
0x05: LLDPDUSystemName,
|
0x06: LLDPDUSystemDescription,
|
0x07: LLDPDUSystemCapabilities,
|
0x08: LLDPDUManagementAddress,
|
range(0x09, 0x7e): None, # reserved - future standardization
|
127: None # organisation specific TLV
|
}
|
|
class LLDPConfiguration(object):
|
"""
|
basic configuration for LLDP layer
|
"""
|
def __init__(self):
|
self._strict_mode = True
|
self.strict_mode_enable()
|
|
def strict_mode_enable(self):
|
"""
|
enable strict mode and dissector debugging
|
"""
|
self._strict_mode = True
|
conf.debug_dissector = True
|
|
def strict_mode_disable(self):
|
"""
|
disable strict mode and dissector debugging
|
"""
|
self._strict_mode = False
|
conf.debug_dissector = False
|
|
def strict_mode(self):
|
"""
|
get current strict mode state
|
"""
|
return self._strict_mode
|
|
|
conf.contribs['LLDP'] = LLDPConfiguration()
|
|
bind_layers(Ether, LLDPDU, type=LLDP_ETHER_TYPE)
|
bind_layers(Dot1Q, LLDPDU, type=LLDP_ETHER_TYPE)
|
