parent
a88b207cf1
commit
663539c206
94
nodedb.py
94
nodedb.py
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@ -59,6 +59,16 @@ class NodeDB:
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except:
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pass
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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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@ -105,8 +115,11 @@ class NodeDB:
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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 x['router'] in node.macs:
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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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@ -203,7 +216,7 @@ class NodeDB:
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node = self.maybe_node_by_mac([mac])
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except:
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try:
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node = self.maybe_node_mac(mac)
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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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@ -291,8 +304,8 @@ class NodeDB:
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idt = link.target.interface
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try:
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node_source = self.maybe_node_by_mac(ids)
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node_target = self.maybe_node_by_mac(idt)
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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 not node_source.flags['client'] and not node_target.flags['client']:
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# if none of the nodes associated with this link are clients,
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@ -341,3 +354,76 @@ def generateId(nodeId,nodeCounters):
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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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if mac_a[4] != mac_b[4] or mac_a[2] != mac_b[2] or mac_a[1] != mac_b[1]:
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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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