blob: affd78ca278fb6444713f0507231fc4cb22c40aa [file] [log] [blame]
# Print the network type for a MAC address:
# $ network_type 00:11:22:33:44:55
# Ethernet
# $
import options
import os
import struct
import sys
SYS_CLASS_NET_PATH = '/sys/class/net'
class Bridge(object):
'eth0': 'Ethernet',
'lan0': 'Ethernet',
'eth1': 'MoCA',
'eth1.0': 'MoCA',
'moca0': 'MoCA',
'moca0.0': 'MoCA',
'eth2': 'Wifi',
'wlan0': 'Wifi',
'wlan1': 'Wifi',
'ath0': 'Wifi',
'ath1': 'Wifi',
def __init__(self, brname):
self.brname = brname
self.hosts = self._GetHostsInBridge()
def GetNetworkType(self, mac):
return self.hosts.get(mac.lower(), 'Unknown')
def _GetInterfacesInBridge(self):
"""Return list of all interfaces in brname."""
if_path = os.path.join(SYS_CLASS_NET_PATH, self.brname, 'brif')
return sorted(os.listdir(if_path))
def _GetHostsInBridge(self):
"""Iterate over all client addresses in the FDB of brname.
iterable of (mac, iface) where:
mac: MAC address of the station
iface: name of the interface where the MAC was seen, like 'eth0'
interfaces = dict()
for (idx, ifc) in enumerate(self._GetInterfacesInBridge(), start=1):
interfaces[idx] = ifc
fdb_path = os.path.join(SYS_CLASS_NET_PATH, self.brname, 'brforward')
hosts = dict()
with open(fdb_path) as f:
fdb = # proc file only works if read all at once
offset = 0
while offset < len(fdb):
(m1, m2, m3, m4, m5, m6, port_lo, unused_local, unused_age_timer,
port_hi, unused_pad1, unused_pad2) = struct.unpack(
'BBBBBBBBIBBH', fdb[offset:offset+16])
mac = '%02x:%02x:%02x:%02x:%02x:%02x' % (m1, m2, m3, m4, m5, m6)
port = (port_hi << 8) | port_lo
netdev = interfaces.get(port, None)
hosts[mac.lower()] = self.WELL_KNOWN_INTERFACES.get(netdev, 'Unknown')
offset += 16
return hosts
if __name__ == '__main__':
br = Bridge('br0')
if len(sys.argv) != 2:
print 'Usage: network_type 00:11:22:33:44:55'
print br.GetNetworkType(str(sys.argv[1]).lower())