actually fix fuzzy matching
parent
8aa71d62e5
commit
ecc7aed694
35
nodedb.py
35
nodedb.py
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@ -22,8 +22,6 @@ class NodeDB:
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def get_nodes(self):
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def get_nodes(self):
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return self._nodes
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return self._nodes
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# this methods has evil side-effects!
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# Better don't call it :-)
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def maybe_node_by_fuzzy_mac(self, mac):
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def maybe_node_by_fuzzy_mac(self, mac):
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mac_a = mac.lower()
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mac_a = mac.lower()
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@ -32,7 +30,7 @@ class NodeDB:
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if is_similar(mac_a, mac_b):
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if is_similar(mac_a, mac_b):
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return node
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return node
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raise
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raise KeyError
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def maybe_node_by_mac(self, macs):
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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 node in self._nodes:
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@ -75,13 +73,7 @@ class NodeDB:
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# consider this MAC as one of the routers
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# consider this MAC as one of the routers
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# MACs
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# MACs
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if 'gateway' in x and x['label'] == "TT":
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if 'gateway' in x and x['label'] == "TT":
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try:
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if is_similar(x['router'], x['gateway']):
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mac_a = list(int(i, 16) for i in x['router'].split(":"))
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mac_b = list(int(i, 16) for i in x['gateway'].split(":"))
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except ValueError:
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continue
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if is_similar(mac_a, mac_b):
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node.add_mac(x['gateway'])
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node.add_mac(x['gateway'])
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# skip processing as regular link
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# skip processing as regular link
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@ -281,7 +273,7 @@ class NodeDB:
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try:
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try:
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node = self.maybe_node_by_fuzzy_mac(data[0])
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node = self.maybe_node_by_fuzzy_mac(data[0])
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except:
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except KeyError:
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node = Node()
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node = Node()
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node.add_mac(data[0])
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node.add_mac(data[0])
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self._nodes.append(node)
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self._nodes.append(node)
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@ -295,20 +287,29 @@ class NodeDB:
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# compares two MACs and decides whether they are
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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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# similar and could be from the same node
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def is_similar(a, b):
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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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# first byte must only differ in bit 2
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if a[0] | 2 == b[0] | 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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# count different bytes
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a = [x for x in zip(a[1:], b[1:]) if x[0] != x[1]]
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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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else:
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return False
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return False
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# no more than two additional bytes must differ
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# no more than two additional bytes must differ
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if len(a) <= 2:
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if len(c) <= 2:
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delta = 0
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delta = 0
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if len(a) > 0:
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if len(c) > 0:
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delta = sum(abs(i[0] -i[1]) for i in a)
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delta = sum(abs(i[0] -i[1]) for i in c)
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# This TT link looks like a mac of the router!
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# These addresses look pretty similar!
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return delta < 8
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return delta < 8
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