347 lines
8 KiB
Python
347 lines
8 KiB
Python
import json
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from functools import reduce
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from collections import defaultdict
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from node import Node, Interface
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from link import Link, LinkConnector
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class NodeDB:
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def __init__(self):
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self._nodes = []
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self._links = []
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# fetch list of links
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def get_links(self):
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self.update_vpn_links()
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return self.reduce_links()
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# fetch list of nodes
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def get_nodes(self):
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return self._nodes
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def maybe_node_by_fuzzy_mac(self, mac):
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mac_a = mac.lower()
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for node in self._nodes:
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for mac_b in node.macs:
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if is_derived_mac(mac_a, mac_b):
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return node
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raise KeyError
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def maybe_node_by_mac(self, macs):
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for node in self._nodes:
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for mac in macs:
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if mac.lower() in node.macs:
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return node
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raise KeyError
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def maybe_node_by_id(self, mac):
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for node in self._nodes:
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if mac.lower() == node.id:
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return node
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raise KeyError
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def parse_vis_data(self,vis_data):
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for x in vis_data:
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if 'of' in x:
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try:
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node = self.maybe_node_by_mac((x['of'], x['secondary']))
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except:
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node = Node()
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node.flags['online'] = True
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if 'legacy' in x:
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node.flags['legacy'] = True
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self._nodes.append(node)
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node.add_mac(x['of'])
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node.add_mac(x['secondary'])
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for x in vis_data:
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if 'router' in x:
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try:
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node = self.maybe_node_by_mac((x['router'], ))
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except:
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node = Node()
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node.flags['online'] = True
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if 'legacy' in x:
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node.flags['legacy'] = True
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node.add_mac(x['router'])
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self._nodes.append(node)
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# If it's a TT link and the MAC is very similar
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# consider this MAC as one of the routers
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# MACs
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if 'gateway' in x and x['label'] == "TT":
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if is_similar(x['router'], x['gateway']):
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node.add_mac(x['gateway'])
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# skip processing as regular link
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continue
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try:
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if 'neighbor' in x:
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try:
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node = self.maybe_node_by_mac((x['neighbor']))
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except:
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continue
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if 'gateway' in x:
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x['neighbor'] = x['gateway']
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node = self.maybe_node_by_mac((x['neighbor'], ))
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except:
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node = Node()
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node.flags['online'] = True
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if x['label'] == 'TT':
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node.flags['client'] = True
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node.add_mac(x['neighbor'])
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self._nodes.append(node)
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for x in vis_data:
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if 'router' in x:
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try:
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if 'gateway' in x:
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x['neighbor'] = x['gateway']
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router = self.maybe_node_by_mac((x['router'], ))
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neighbor = self.maybe_node_by_mac((x['neighbor'], ))
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except:
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continue
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# filter TT links merged in previous step
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if router == neighbor:
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continue
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link = Link()
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link.source = LinkConnector()
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link.source.interface = x['router']
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link.source.id = self._nodes.index(router)
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link.target = LinkConnector()
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link.target.interface = x['neighbor']
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link.target.id = self._nodes.index(neighbor)
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link.quality = x['label']
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link.id = "-".join(sorted((link.source.interface, link.target.interface)))
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if x['label'] == "TT":
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link.type = "client"
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self._links.append(link)
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for x in vis_data:
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if 'primary' in x:
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try:
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node = self.maybe_node_by_mac((x['primary'], ))
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except:
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continue
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node.id = x['primary']
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def reduce_links(self):
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tmp_links = defaultdict(list)
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for link in self._links:
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tmp_links[link.id].append(link)
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links = []
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def reduce_link(a, b):
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a.id = b.id
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a.source = b.source
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a.target = b.target
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a.type = b.type
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a.quality = ", ".join([x for x in (a.quality, b.quality) if x])
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return a
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for k, v in tmp_links.items():
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new_link = reduce(reduce_link, v, Link())
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links.append(new_link)
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return links
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def import_aliases(self, aliases):
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for mac, alias in aliases.items():
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try:
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node = self.maybe_node_by_fuzzy_mac(mac)
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except:
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# create an offline node
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node = Node()
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node.add_mac(mac)
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self._nodes.append(node)
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if 'name' in alias:
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node.name = alias['name']
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if 'vpn' in alias and alias['vpn']:
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node.interfaces[mac].vpn = True
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if 'gps' in alias:
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node.gps = alias['gps']
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# list of macs
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# if options['gateway']:
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# mark_gateways(options['gateway'])
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def mark_gateways(self, gateways):
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for gateway in gateways:
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try:
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node = self.maybe_node_by_mac((gateway, ))
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except:
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continue
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node.flags['gateway'] = True
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def update_vpn_links(self):
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changes = 1
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while changes > 0:
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changes = 0
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for link in self._links:
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if link.type == "client":
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continue
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source_interface = self._nodes[link.source.id].interfaces[link.source.interface]
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target_interface = self._nodes[link.target.id].interfaces[link.target.interface]
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if source_interface.vpn or target_interface.vpn:
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source_interface.vpn = True
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target_interface.vpn = True
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if link.type != "vpn":
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changes += 1
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link.type = "vpn"
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def obscure_clients(self):
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globalIdCounter = 0
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nodeCounters = {}
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clientIds = {}
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for node in self._nodes:
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if node.flags['client']:
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node.macs = set()
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clientIds[node.id] = None
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for link in self._links:
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ids = link.source.interface
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idt = link.target.interface
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try:
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node_source = self.maybe_node_by_fuzzy_mac(ids)
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node_target = self.maybe_node_by_id(idt)
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if ids in clientIds and idt in clientIds:
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# This is for corner cases, when a client
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# is linked to another client.
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clientIds[ids] = str(globalIdCounter)
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id1 = str(globalIdCounter)
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globalIdCounter += 1
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clientIds[idt] = str(globalIdCounter)
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idt = str(globalIdCounter)
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globalIdCounter += 1
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elif ids in clientIds:
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newId = generateId(idt)
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clientIds[ids] = newId
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ids = newId
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link.source.interface = ids;
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node_source.id = ids;
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elif idt in clientIds:
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newId = generateId(ids,nodeCounters)
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clientIds[idt] = newId
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idt = newId
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link.target.interface = idt;
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node_target.id = idt;
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link.id = ids + "-" + idt
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except:
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pass
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# extends node id by incremented node counter
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def generateId(nodeId,nodeCounters):
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if nodeId in nodeCounters:
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n = nodeCounters[nodeId]
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nodeCounters[nodeId] = n + 1
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else:
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nodeCounters[nodeId] = 1
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n = 0
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return nodeId + "_" + str(n)
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# compares two MACs and decides whether they are
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# similar and could be from the same node
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def is_similar(a, b):
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if a == b:
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return True
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try:
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mac_a = list(int(i, 16) for i in a.split(":"))
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mac_b = list(int(i, 16) for i in b.split(":"))
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except ValueError:
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return False
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# first byte must only differ in bit 2
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if mac_a[0] | 2 == mac_b[0] | 2:
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# count different bytes
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c = [x for x in zip(mac_a[1:], mac_b[1:]) if x[0] != x[1]]
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else:
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return False
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# no more than two additional bytes must differ
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if len(c) <= 2:
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delta = 0
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if len(c) > 0:
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delta = sum(abs(i[0] -i[1]) for i in c)
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# These addresses look pretty similar!
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return delta < 8
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def is_derived_mac(a, b):
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if a == b:
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return True
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try:
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mac_a = list(int(i, 16) for i in a.split(":"))
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mac_b = list(int(i, 16) for i in b.split(":"))
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except ValueError:
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return False
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x = list(mac_a)
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x[5] += 1
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x[5] %= 255
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if mac_b == x:
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return True
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x[0] |= 2
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if mac_b == x:
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return True
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x[3] += 1
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x[3] %= 255
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if mac_b == x:
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return True
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x = list(mac_a)
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x[0] |= 2
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x[5] += 2
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x[5] %= 255
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if mac_b == x:
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return True
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x = list(mac_a)
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x[0] |= 2
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x[3] += 1
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x[3] %= 255
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if mac_b == x:
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return True
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return False
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