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#! /usr/bin/env python
import sys
import dbus
import shlex
import subprocess
from signal import SIGTERM
import os
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:
var = var.lstrip() # JP: allow assignments to be indented, as they can be when sourced
if var[0] != '#':
value = value.partition("#")[0].rstrip() # JP: strip off comments and trailing whitespace
if value[0] == value[-1] and value[0] in ('"',"'"): # JP: strip any surrounding quotes
value=value[1:-1]
options[var] = value
return options
def wep_hex2dec(key):
if len(key) not in [10, 26]:
fail("Bad key", report_type="err")
x=0
new_key=[]
while x<len(key):
new_key.append(int(key[x:x+2],16))
x+=2
return new_key
# JP: connect to our hookable reporting functions in /usr/lib/network/globals
def report(report_type, *args):
report_handler.stdin.write('report_%s %s\n' % (report_type, ' '.join(map(repr,args))))
def fail(msg=None, report_type="fail"):
if msg:
report(report_type, msg)
try:
pid = open("/var/run/wpa_supplicant.pid").read()
except IOError:
pass
else:
os.kill(int(pid),SIGTERM)
sys.exit(1)
def start(profile, essid):
# 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", report_type="err")
# Start wpa_supplicant
report('debug', 'wireless_dbus', 'starting wpa_supplicant')
supplicant = subprocess.Popen(args,stderr=subprocess.STDOUT,stdout=subprocess.PIPE)
output = supplicant.communicate()[0]
if supplicant.returncode not in [255,0]:
print >>sys.stderr, output # JP: print to stderr
fail("Could not start wpa_supplicant")
# Connect to wpa_supplicant
report('debug', 'wireless_dbus', 'connecting 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']:
report('debug', 'wireless_dbus', 'add and select network')
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 not essid:
essid = profile["ESSID"]
if profile['SECURITY'] == "wpa":
opts = dbus.Dictionary({"ssid": dbus.ByteArray(essid),
"psk": dbus.String(profile['KEY'])},
signature="sv")
report('debug', 'wireless_dbus', 'connect to network with security=wpa')
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(essid),
"key_mgmt": dbus.String("NONE"),
"wep_tx_keyidx": dbus.Int32(1),
"wep_key0": dbus.ByteArray(keydbus)},
signature="sv")
report('debug', 'wireless_dbus', 'connect to network with security=wep')
rnet.set(opts)
elif profile['SECURITY'] == "none":
opts = dbus.Dictionary({"ssid": dbus.ByteArray(essid)},
signature="sv")
report('debug', 'wireless_dbus', 'connect to network with security=none')
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([ETHERNET_IPROUTE, "up", sys.argv[2]])
except subprocess.CalledProcessError:
fail()
sys.exit(0)
def stop(profile):
ret = subprocess.call([ETHERNET_IPROUTE, "down", sys.argv[2]])
os.kill(int(open("/var/run/wpa_supplicant.pid").read()),SIGTERM)
sys.exit(ret)
if __name__ == "__main__":
CONN_DIR = os.path.abspath(os.path.dirname(sys.argv[0]))
ETHERNET_IPROUTE = os.path.join(CONN_DIR,"ethernet-iproute")
WIRELESS = os.path.join(CONN_DIR,"wireless")
# setup bash report_* handler
report_handler_script = 'source %s/../globals; while read cmd args; do eval $cmd "$args"; done' % (CONN_DIR,)
report_handler = subprocess.Popen(report_handler_script, executable='/bin/bash', stdin=subprocess.PIPE, shell=True)
try:
profile_name = sys.argv[2]
profile = read_config("/etc/network.d/"+profile_name)
essid = sys.argv[3] if len(sys.argv)>3 else "" # JP: pass literal ESSID as an argument, so that we can have entry in profile be a regexp
if sys.argv[1] == "up":
start(profile, essid)
elif sys.argv[1] == "down":
stop(profile)
finally:
report_handler.stdin.close()
report_handler.wait()
# vim: et ts=4
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