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#! /usr/bin/env python
import sys
import dbus
import shlex
import subprocess
from signal import SIGTERM
from os import kill
from time import sleep
# dbus constants.
WPAS_DBUS_SERVICE = "fi.epitest.hostap.WPASupplicant"
WPAS_DBUS_INTERFACE = "fi.epitest.hostap.WPASupplicant"
WPAS_DBUS_OPATH = "/fi/epitest/hostap/WPASupplicant"
WPAS_DBUS_INTERFACES_INTERFACE = "fi.epitest.hostap.WPASupplicant.Interface"
WPAS_DBUS_INTERFACES_OPATH = "/fi/epitest/hostap/WPASupplicant/Interfaces"
WPAS_DBUS_BSSID_INTERFACE = "fi.epitest.hostap.WPASupplicant.BSSID"
WPAS_DBUS_NETWORKS_INTERFACE = "fi.epitest.hostap.WPASupplicant.Network"
def read_config(config):
cfg = shlex.split(open(config, "r").read())
options = {}
for line in cfg:
(var, delim, value) = line.partition('=')
if delim and var.lstrip()[0] != "#":
options[var] = value
return options
def wep_hex2dec(key):
if len(key) not in [10, 26]:
print "Bad key"
raise SyntaxError
x=0
new_key=[]
while x<len(key):
new_key.append(int(key[x:x+2],16))
x+=2
return new_key
def fail(msg=None):
if msg:
print " -", msg
kill(int(open("/var/run/wpa_supplicant.pid").read()),SIGTERM)
sys.exit(1)
def start(profile):
# TODO: Add check if it's even a wireless interface
# Interface up - probably redundant, should be 'ip' instead.
#try:
# subprocess.check_call(["ifconfig", profile['INTERFACE'], "up"])
#except subprocess.CalledProcessError:
# print " - Could not bring interface up"
# return False
# Manually set any iwconfig options - redundant, use custom wpa_supplicant config instead.
#if profile.has_key('IWCONFIG'):
# subprocess.call(["iwconfig", profile['INTERFACE'], profile['IWCONFIG']])
# Base arguments
args=["wpa_supplicant", "-Bu", "-P/var/run/wpa_supplicant.pid"]
try:
args.append(profile['WPA_OPTS'])
except KeyError:
args.append("-Dwext")
if profile['SECURITY'] == "wpa-config":
try:
args.append("-c" + profile["WPA_CONF"])
except KeyError:
args.append("-c/etc/wpa_supplicant.conf")
elif not profile['SECURITY'] in ['wpa', 'wep', 'none']:
fail("Invalid security chosen")
# Start wpa_supplicant
supplicant = subprocess.Popen(args,stderr=subprocess.STDOUT,stdout=subprocess.PIPE)
output = supplicant.communicate()[0]
if supplicant.returncode not in [255,0]:
print output
fail("Could not start wpa_supplicant")
# Connect to wpa_supplicant
bus = dbus.SystemBus()
wpas_obj = bus.get_object(WPAS_DBUS_SERVICE, WPAS_DBUS_OPATH)
wpas = dbus.Interface(wpas_obj, WPAS_DBUS_INTERFACE)
# Add/Get interface path
try:
driver=profile["WPA_DRIVER"]
except KeyError:
driver="wext"
try:
path = wpas.getInterface(profile["INTERFACE"])
except dbus.exceptions.DBusException:
path = wpas.addInterface(profile["INTERFACE"], {"driver":dbus.String(driver,variant_level=1)})
# Get interface object
if_obj = bus.get_object(WPAS_DBUS_SERVICE, path)
iface = dbus.Interface(if_obj, WPAS_DBUS_INTERFACES_INTERFACE);
# Add and select the network. Networks already specified for wpa-config
if profile['SECURITY'] in ['wpa','wep','none']:
path = iface.addNetwork()
net_obj = bus.get_object(WPAS_DBUS_SERVICE, path)
rnet = dbus.Interface(net_obj, WPAS_DBUS_NETWORKS_INTERFACE)
iface.selectNetwork(rnet)
if profile['SECURITY'] == "wpa":
opts = dbus.Dictionary({"ssid": dbus.ByteArray(profile['ESSID']),
"psk": dbus.String(profile['KEY'])},
signature="sv")
rnet.set(opts)
elif profile['SECURITY'] == "wep":
key=profile['KEY']
if key[:2] == "s:": # String key prefixed by "s:"
keydbus=key[2:]
else: # Hex key
key=wep_hex2dec(key)
keydbus = dbus.ByteArray()
for l in key:
keydbus+=chr(l)
opts = dbus.Dictionary({"ssid": dbus.ByteArray(profile['ESSID']),
"key_mgmt": dbus.String("NONE"),
"wep_tx_keyidx": dbus.Int32(1),
"wep_key0": dbus.ByteArray(keydbus)},
signature="sv")
rnet.set(opts)
elif profile['SECURITY'] == "none":
opts = dbus.Dictionary({"ssid": dbus.ByteArray(profile['ESSID'])},
signature="sv")
rnet.set(opts)
# Determine timeout
try:
timeout = int(profile["TIMEOUT"])
except KeyError:
timeout = 15
# Check for association
n=0
while n <= timeout:
n+=1
sleep(1)
state = iface.state()
if state == "COMPLETED":
break
if n == timeout:
fail("Association/Authentication failed:" + state)
# Run ethernet and get an ip.
try:
subprocess.check_call(["/usr/lib/network/connections/ethernet-iproute", "up", sys.argv[2]])
except subprocess.CalledProcessError:
fail()
sys.exit(0)
def stop(profile):
subprocess.call(["/usr/lib/network/connections/ethernet", "down", sys.argv[2]])
kill(int(open("/var/run/wpa_supplicant.pid").read()),SIGTERM)
sys.exit(0)
if __name__ == "__main__":
profile = read_config("/etc/network.d/"+sys.argv[2])
if sys.argv[1] == "up":
start(profile)
elif sys.argv[1] == "down":
stop(profile)
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