121 lines
4.2 KiB
Python
121 lines
4.2 KiB
Python
# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
#
|
|
|
|
import dbus
|
|
import dbus.mainloop.glib
|
|
import netifaces
|
|
import time
|
|
|
|
|
|
def get_wiface_name():
|
|
for iface in netifaces.interfaces():
|
|
if iface.startswith('w'):
|
|
return iface
|
|
return None
|
|
|
|
|
|
def get_wiface_IPv4(iface):
|
|
try:
|
|
[info] = netifaces.ifaddresses(iface)[netifaces.AF_INET]
|
|
return info['addr']
|
|
except KeyError:
|
|
return None
|
|
|
|
|
|
class wpa_cli:
|
|
def __init__(self, iface, reset_on_exit=False):
|
|
self.iface_name = iface
|
|
self.iface_obj = None
|
|
self.iface_ifc = None
|
|
self.old_network = None
|
|
self.new_network = None
|
|
self.connected = False
|
|
self.reset_on_exit = reset_on_exit
|
|
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
|
|
bus = dbus.SystemBus()
|
|
|
|
service = dbus.Interface(bus.get_object("fi.w1.wpa_supplicant1", "/fi/w1/wpa_supplicant1"),
|
|
"fi.w1.wpa_supplicant1")
|
|
iface_path = service.GetInterface(self.iface_name)
|
|
self.iface_obj = bus.get_object("fi.w1.wpa_supplicant1", iface_path)
|
|
self.iface_ifc = dbus.Interface(self.iface_obj, "fi.w1.wpa_supplicant1.Interface")
|
|
self.iface_props = dbus.Interface(self.iface_obj, 'org.freedesktop.DBus.Properties')
|
|
if self.iface_ifc is None:
|
|
raise RuntimeError('supplicant : Failed to fetch interface')
|
|
|
|
self.old_network = self._get_iface_property("CurrentNetwork")
|
|
print("Old network is %s" % self.old_network)
|
|
|
|
if self.old_network == '/':
|
|
self.old_network = None
|
|
else:
|
|
self.connected = True
|
|
|
|
def _get_iface_property(self, name):
|
|
""" Read the property with 'name' from the wi-fi interface object
|
|
|
|
Note: The result is a dbus wrapped type, so should usually convert it to the corresponding native
|
|
Python type
|
|
"""
|
|
return self.iface_props.Get("fi.w1.wpa_supplicant1.Interface", name)
|
|
|
|
def connect(self, ssid, password):
|
|
if self.connected is True:
|
|
self.iface_ifc.Disconnect()
|
|
self.connected = False
|
|
|
|
if self.new_network is not None:
|
|
self.iface_ifc.RemoveNetwork(self.new_network)
|
|
|
|
print("Pre-connect state is %s, IP is %s" % (self._get_iface_property("State"), get_wiface_IPv4(self.iface_name)))
|
|
|
|
self.new_network = self.iface_ifc.AddNetwork({"ssid": ssid, "psk": password})
|
|
self.iface_ifc.SelectNetwork(self.new_network)
|
|
|
|
ip = None
|
|
retry = 10
|
|
while retry > 0:
|
|
time.sleep(5)
|
|
|
|
state = str(self._get_iface_property("State"))
|
|
print("wpa iface state %s (scanning %s)" % (state, bool(self._get_iface_property("Scanning"))))
|
|
if state in ["disconnected", "inactive"]:
|
|
self.iface_ifc.Reconnect()
|
|
|
|
ip = get_wiface_IPv4(self.iface_name)
|
|
print("wpa iface %s IP %s" % (self.iface_name, ip))
|
|
if ip is not None:
|
|
self.connected = True
|
|
return ip
|
|
retry -= 1
|
|
|
|
self.reset()
|
|
raise RuntimeError('wpa_cli : Connection failed')
|
|
|
|
def reset(self):
|
|
if self.iface_ifc is not None:
|
|
if self.connected is True:
|
|
self.iface_ifc.Disconnect()
|
|
self.connected = False
|
|
if self.new_network is not None:
|
|
self.iface_ifc.RemoveNetwork(self.new_network)
|
|
self.new_network = None
|
|
if self.old_network is not None:
|
|
self.iface_ifc.SelectNetwork(self.old_network)
|
|
self.old_network = None
|
|
|
|
def __del__(self):
|
|
if self.reset_on_exit is True:
|
|
self.reset()
|