122 lines
4.2 KiB
Python
122 lines
4.2 KiB
Python
# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import dbus
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import dbus.mainloop.glib
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import netifaces
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import time
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def get_wiface_name():
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for iface in netifaces.interfaces():
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if iface.startswith('w'):
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return iface
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return None
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def get_wiface_IPv4(iface):
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try:
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[info] = netifaces.ifaddresses(iface)[netifaces.AF_INET]
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return info['addr']
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except KeyError:
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return None
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class wpa_cli:
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def __init__(self, iface, reset_on_exit=False):
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self.iface_name = iface
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self.iface_obj = None
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self.iface_ifc = None
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self.old_network = None
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self.new_network = None
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self.connected = False
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self.reset_on_exit = reset_on_exit
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dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
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bus = dbus.SystemBus()
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service = dbus.Interface(bus.get_object("fi.w1.wpa_supplicant1", "/fi/w1/wpa_supplicant1"),
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"fi.w1.wpa_supplicant1")
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iface_path = service.GetInterface(self.iface_name)
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self.iface_obj = bus.get_object("fi.w1.wpa_supplicant1", iface_path)
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self.iface_ifc = dbus.Interface(self.iface_obj, "fi.w1.wpa_supplicant1.Interface")
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self.iface_props = dbus.Interface(self.iface_obj, 'org.freedesktop.DBus.Properties')
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if self.iface_ifc is None:
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raise RuntimeError('supplicant : Failed to fetch interface')
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self.old_network = self._get_iface_property("CurrentNetwork")
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print("Old network is %s" % self.old_network)
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if self.old_network == '/':
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self.old_network = None
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else:
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self.connected = True
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def _get_iface_property(self, name):
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""" Read the property with 'name' from the wi-fi interface object
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Note: The result is a dbus wrapped type, so should usually convert it to the corresponding native
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Python type
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"""
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return self.iface_props.Get("fi.w1.wpa_supplicant1.Interface", name)
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def connect(self, ssid, password):
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if self.connected is True:
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self.iface_ifc.Disconnect()
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self.connected = False
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if self.new_network is not None:
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self.iface_ifc.RemoveNetwork(self.new_network)
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print("Pre-connect state is %s, IP is %s" % (self._get_iface_property("State"), get_wiface_IPv4(self.iface_name)))
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self.new_network = self.iface_ifc.AddNetwork({"ssid": ssid, "psk": password})
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self.iface_ifc.SelectNetwork(self.new_network)
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time.sleep(10)
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ip = None
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retry = 10
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while retry > 0:
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time.sleep(5)
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state = str(self._get_iface_property("State"))
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print("wpa iface state %s (scanning %s)" % (state, bool(self._get_iface_property("Scanning"))))
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if state in ["disconnected", "inactive"]:
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self.iface_ifc.Reconnect()
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ip = get_wiface_IPv4(self.iface_name)
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print("wpa iface %s IP %s" % (self.iface_name, ip))
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if ip is not None:
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self.connected = True
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return ip
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retry -= 1
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time.sleep(3)
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self.reset()
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raise RuntimeError('wpa_cli : Connection failed')
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def reset(self):
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if self.iface_ifc is not None:
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if self.connected is True:
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self.iface_ifc.Disconnect()
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self.connected = False
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if self.new_network is not None:
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self.iface_ifc.RemoveNetwork(self.new_network)
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self.new_network = None
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if self.old_network is not None:
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self.iface_ifc.SelectNetwork(self.old_network)
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self.old_network = None
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def __del__(self):
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if self.reset_on_exit is True:
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self.reset()
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