Merge pull request #42 from mweinelt/master

pep8, batadv-vis socket support, batman gateway handling refactored

.travis.yml

@@ -3,4 +3,4 @@ language: python
 python:
   - "3.4"
 install: "pip install pep8"
-script: "pep8 *.py"
+script: "pep8 *.py lib/*.py"

backend.py

@@ -50,7 +50,7 @@ def main(params):
 
     bm = list(map(lambda d:
                   (d.vis_data(True), d.gateway_list()),
-                  map(Batman, params['mesh'])))
+                  map(Batman, params['mesh'], params['alfred_sock'])))
     for vis_data, gateway_list in bm:
         nodes.import_mesh_ifs_vis_data(nodedb['nodes'], vis_data)
         nodes.import_vis_clientcount(nodedb['nodes'], vis_data)

lib/NodeRRD.py

@@ -32,11 +32,13 @@ class NodeRRD(RRD):
 
     @property
     def imagename(self):
-        return "{basename}.png".format(basename=os.path.basename(self.filename).rsplit('.', 2)[0])
+        return "{basename}.png".format(
+            basename=os.path.basename(self.filename).rsplit('.', 2)[0])
 
     # TODO: fix this, python does not support function overloading
     def update(self):
-        super().update({'upstate': int(self.node['flags']['online']), 'clients': self.node['statistics']['clients']})
+        super().update({'upstate': int(self.node['flags']['online']),
+                        'clients': self.node['statistics']['clients']})
 
     def graph(self, directory, timeframe):
         """

lib/RRD.py

@@ -83,9 +83,11 @@ class RRD(object):
         info = self.info()
         if set(ds_list) - set(info['ds'].values()) != set():
             for ds in ds_list:
-                if ds.name in info['ds'] and ds.type != info['ds'][ds.name].type:
+                if ds.name in info['ds'] and\
-                    raise RRDIncompatibleException("%s is %s but should be %s" %
+                   ds.type != info['ds'][ds.name].type:
-                                                   (ds.name, ds.type, info['ds'][ds.name].type))
+                    raise RRDIncompatibleException(
+                        "{} is {} but should be {}".format(
+                            ds.name, ds.type, info['ds'][ds.name].type))
             else:
                 raise RRDOutdatedException()
 
@@ -108,8 +110,10 @@ class RRD(object):
             if ds.name in info['ds']:
                 old_ds = info['ds'][ds.name]
                 if info['ds'][ds.name].type != ds.type:
-                    raise RuntimeError('Cannot convert existing DS "%s" from type "%s" to "%s"' %
+                    raise RuntimeError(
-                                       (ds.name, old_ds.type, ds.type))
+                        "Cannot convert existing DS '{}'"
+                        "from type '{}' to '{}'".format(
+                            ds.name, old_ds.type, ds.type))
                 ds.index = old_ds.index
                 new_ds[ds.index] = ds
             else:
@@ -237,7 +241,8 @@ class RRD(object):
         for line in out.splitlines():
             base = info
             for match in self._info_regex.finditer(line):
-                section, key, name, value = match.group("section", "key", "name", "value")
+                section, key, name, value = match.group(
+                    "section", "key", "name", "value")
                 if section and key:
                     try:
                         key = int(key)
@@ -258,7 +263,8 @@ class RRD(object):
                             base[name] = value
         dss = {}
         for name, ds in info['ds'].items():
-            ds_obj = DS(name, ds['type'], ds['minimal_heartbeat'], ds['min'], ds['max'])
+            ds_obj = DS(name, ds['type'], ds['minimal_heartbeat'],
+                        ds['min'], ds['max'])
             ds_obj.index = ds['index']
             ds_obj.last_ds = ds['last_ds']
             ds_obj.value = ds['value']
@@ -267,7 +273,8 @@ class RRD(object):
         info['ds'] = dss
         rras = []
         for rra in info['rra'].values():
-            rras.append(RRA(rra['cf'], rra['xff'], rra['pdp_per_row'], rra['rows']))
+            rras.append(RRA(rra['cf'], rra['xff'],
+                            rra['pdp_per_row'], rra['rows']))
         info['rra'] = rras
         self._cached_info = info
         return info

lib/batman.py

@@ -8,8 +8,12 @@ class Batman(object):
     Bindings for B.A.T.M.A.N. Advanced
     commandline interface "batctl"
     """
-    def __init__(self, mesh_interface='bat0'):
+    def __init__(self, mesh_interface='bat0', alfred_sockpath=None):
         self.mesh_interface = mesh_interface
+        self.alfred_sock = alfred_sockpath
+
+        # compile regular expressions only once on startup
+        self.mac_addr_pattern = re.compile(r'(([a-z0-9]{2}:){5}[a-z0-9]{2})')
 
     def vis_data(self, batadv_vis=False):
         vds = self.vis_data_batctl_legacy()
@@ -44,8 +48,10 @@ class Batman(object):
         Parse "batadv-vis -i <mesh_interface> -f json"
         into an array of dictionaries.
         """
-        output = subprocess.check_output(
+        cmd = ['batadv-vis', '-i', self.mesh_interface, '-f', 'json']
-            ['batadv-vis', '-i', self.mesh_interface, '-f', 'json'])
+        if self.alfred_sock:
+            cmd.extend(['-u', self.alfred_sock])
+        output = subprocess.check_output(cmd)
         lines = output.splitlines()
         return self.vis_data_helper(lines)
 
@@ -57,36 +63,35 @@ class Batman(object):
         output = subprocess.check_output(
             ['batctl', '-m', self.mesh_interface, 'gwl', '-n'])
         output_utf8 = output.decode('utf-8')
-        lines = output_utf8.splitlines()
+        rows = output_utf8.splitlines()
-
-        own_mac = re.match(r"^.*MainIF/MAC: [^/]+/([0-9a-f:]+).*$",
-                           lines[0]).group(1)
 
         gateways = []
-        gw_mode = self.gateway_mode()
-        if gw_mode['mode'] == 'server':
-            gateways.append(own_mac)
 
-        for line in lines:
+        # local gateway
-            gw_line = re.match(r"^(?:=>)? +([0-9a-f:]+) ", line)
+        header = rows.pop(0)
-            if gw_line:
+        mode, bandwidth = self.gateway_mode()
-                gateways.append(gw_line.group(1))
+        if mode == 'server':
+            local_gw_mac = self.mac_addr_pattern.search(header).group(0)
+            gateways.append(local_gw_mac)
+
+        # remote gateway(s)
+        for row in rows:
+            match = self.mac_addr_pattern.search(row)
+            if match:
+                gateways.append(match.group(1))
 
         return gateways
 
     def gateway_mode(self):
         """
         Parse "batctl -m <mesh_interface> gw"
+        return: tuple mode, bandwidth, if mode != server then bandwidth is None
         """
         output = subprocess.check_output(
             ['batctl', '-m', self.mesh_interface, 'gw'])
-        elements = output.decode("utf-8").split()
+        chunks = output.decode("utf-8").split()
-        mode = elements[0]
+
-        if mode == 'server':
+        return chunks[0], chunks[3] if 3 in chunks else None
-            return {'mode': 'server',
-                    'bandwidth': elements[3]}
-        else:
-            return {'mode': mode}
 
 if __name__ == "__main__":
     bc = Batman()

lib/graph.py

@@ -8,12 +8,17 @@ from lib.nodes import build_mac_table
 
 def import_vis_data(graph, nodes, vis_data):
     macs = build_mac_table(nodes)
-    nodes_a = map(lambda d: 2*[d['primary']], filter(lambda d: 'primary' in d, vis_data))
+    nodes_a = map(lambda d: 2*[d['primary']],
-    nodes_b = map(lambda d: [d['secondary'], d['of']], filter(lambda d: 'secondary' in d, vis_data))
+                  filter(lambda d: 'primary' in d, vis_data))
-    graph.add_nodes_from(map(lambda a, b: (a, dict(primary=b, node_id=macs.get(b))), *zip(*chain(nodes_a, nodes_b))))
+    nodes_b = map(lambda d: [d['secondary'], d['of']],
+                  filter(lambda d: 'secondary' in d, vis_data))
+    graph.add_nodes_from(map(lambda a, b:
+                             (a, dict(primary=b, node_id=macs.get(b))),
+                             *zip(*chain(nodes_a, nodes_b))))
 
     edges = filter(lambda d: 'neighbor' in d, vis_data)
-    graph.add_edges_from(map(lambda d: (d['router'], d['neighbor'], dict(tq=float(d['label']))), edges))
+    graph.add_edges_from(map(lambda d: (d['router'], d['neighbor'],
+                                        dict(tq=float(d['label']))), edges))
 
 
 def mark_vpn(graph, vpn_macs):
@@ -32,11 +37,13 @@ def to_multigraph(graph):
         return node['primary'] if node else a
 
     def map_node(node, data):
-        return (data['primary'], dict(node_id=data['node_id'])) if data else (node, dict())
+        return (data['primary'],
+                dict(node_id=data['node_id'])) if data else (node, dict())
 
     digraph = nx.MultiDiGraph()
     digraph.add_nodes_from(map(map_node, *zip(*graph.nodes_iter(data=True))))
-    digraph.add_edges_from(map(lambda a, b, data: (f(a), f(b), data), *zip(*graph.edges_iter(data=True))))
+    digraph.add_edges_from(map(lambda a, b, data: (f(a), f(b), data),
+                               *zip(*graph.edges_iter(data=True))))
 
     return digraph
 
@@ -50,7 +57,8 @@ def merge_nodes(graph):
     multigraph = to_multigraph(graph)
     digraph = nx.DiGraph()
     digraph.add_nodes_from(multigraph.nodes_iter(data=True))
-    edges = chain.from_iterable([[(e, d, merge_edges(multigraph[e][d].values()))
+    edges = chain.from_iterable([[(e, d, merge_edges(
+        multigraph[e][d].values()))
         for d in multigraph[e]] for e in multigraph])
     digraph.add_edges_from(edges)
 
@@ -69,7 +77,8 @@ def to_undirected(graph):
 
     graph = nx.Graph()
     graph.add_nodes_from(multigraph.nodes_iter(data=True))
-    edges = chain.from_iterable([[(e, d, merge_edges(multigraph[e][d].values()))
+    edges = chain.from_iterable([[(e, d, merge_edges(
+        multigraph[e][d].values()))
         for d in multigraph[e]] for e in multigraph])
     graph.add_edges_from(edges)
 

lib/nodes.py

@@ -53,23 +53,26 @@ def reset_statistics(nodes):
         node['statistics'] = {'clients': 0}
 
 
-def import_statistics(nodes, statistics):
+def import_statistics(nodes, stats):
     def add(node, statistics, target, source, f=lambda d: d):
         try:
-            node['statistics'][target] = f(reduce(dict.__getitem__, source, statistics))
+            node['statistics'][target] = f(reduce(dict.__getitem__,
+                                                  source,
+                                                  statistics))
         except (KeyError, TypeError):
             pass
 
     macs = build_mac_table(nodes)
-    statistics = filter(lambda d: 'node_id' in d, statistics)
+    stats = filter(lambda d: 'node_id' in d, stats)
-    statistics = filter(lambda d: d['node_id'] in nodes, statistics)
+    stats = filter(lambda d: d['node_id'] in nodes, stats)
-    for node, statistics in map(lambda d: (nodes[d['node_id']], d), statistics):
+    for node, stats in map(lambda d: (nodes[d['node_id']], d), stats):
-        add(node, statistics, 'clients', ['clients', 'total'])
+        add(node, stats, 'clients', ['clients', 'total'])
-        add(node, statistics, 'gateway', ['gateway'], lambda d: macs.get(d, d))
+        add(node, stats, 'gateway', ['gateway'], lambda d: macs.get(d, d))
-        add(node, statistics, 'uptime', ['uptime'])
+        add(node, stats, 'uptime', ['uptime'])
-        add(node, statistics, 'loadavg', ['loadavg'])
+        add(node, stats, 'loadavg', ['loadavg'])
-        add(node, statistics, 'memory_usage', ['memory'], lambda d: 1 - d['free'] / d['total'])
+        add(node, stats, 'memory_usage', ['memory'],
-        add(node, statistics, 'rootfs_usage', ['rootfs_usage'])
+            lambda d: 1 - d['free'] / d['total'])
+        add(node, stats, 'rootfs_usage', ['rootfs_usage'])
 
 
 def import_mesh_ifs_vis_data(nodes, vis_data):

lib/rrddb.py

@@ -28,8 +28,10 @@ class RRD(object):
             os.mkdir(self.imagePath)
 
     def update_database(self, nodes):
-        online_nodes = dict(filter(lambda d: d[1]['flags']['online'], nodes.items()))
+        online_nodes = dict(filter(
-        client_count = sum(map(lambda d: d['statistics']['clients'], online_nodes.values()))
+            lambda d: d[1]['flags']['online'], nodes.items()))
+        client_count = sum(map(
+            lambda d: d['statistics']['clients'], online_nodes.values()))
 
         self.globalDb.update(len(online_nodes), client_count)
         for node_id, node in online_nodes.items():
@@ -37,7 +39,8 @@ class RRD(object):
             rrd.update()
 
     def update_images(self):
-        self.globalDb.graph(os.path.join(self.imagePath, "globalGraph.png"), self.displayTimeGlobal)
+        self.globalDb.graph(os.path.join(self.imagePath, "globalGraph.png"),
+                            self.displayTimeGlobal)
 
         nodedb_files = os.listdir(self.dbPath)