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[英]Python DBUS - `PropertiesChanged` listener on interface with extra arguments
[英]Accessing iwd dbus interface from python
我正在嘗試使用 python3 dbus 包來控制嵌入式 Linux 目標上的無線(mips MT7628,如果重要的話)。
系統很可能設置正確,因為我在這個嵌入式目標上啟動並運行了 iwd + dhclient。
我可以通過 eth0 和 wlan0 連接。
我也可以通過 iwctl 控制 iwd。 到現在為止還挺好。
我現在需要從 python3 控制 iwd; 具體來說,我需要能夠通過串行線發送掃描結果(真正的目標,與我的開發板相反,將是無頭的)。
我對 dbus 接口不知所措。 我需要一些例子來開始。
我嘗試了一些方法:
# python
Python 3.8.1 (default, Feb 21 2020, 11:13:38)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import dbus
>>> bus = dbus.SystemBus()
>>> wlan0 = bus.get_object('net.connman.iwd', '/net/connman/iwd/phy1/1')
>>> p = wlan0.Properties(dbus_interface='net.connman.iwd.Station')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.8/site-packages/dbus/proxies.py", line 72, in __call__
File "/usr/lib/python3.8/site-packages/dbus/proxies.py", line 141, in __call__
File "/usr/lib/python3.8/site-packages/dbus/connection.py", line 652, in call_blocking
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NotFound: No matching method found
>>> p = wlan0.Scan(dbus_interface='net.connman.iwd.Station')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.8/site-packages/dbus/proxies.py", line 141, in __call__
File "/usr/lib/python3.8/site-packages/dbus/connection.py", line 652, in call_blocking
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NotFound: No matching method found
>>>
這在 WiFi 工作時:
# iwctl
[iwd]# adapter list
Adapters *
--------------------------------------------------------------------------------
Name Powered Vendor Model
--------------------------------------------------------------------------------
phy1 on --
[iwd]# device list
Devices *
--------------------------------------------------------------------------------
Name Address Powered Adapter Mode
--------------------------------------------------------------------------------
wlan1 42:c1:f8:85:67:ba on phy1 station
[iwd]# station list
Devices in Station Mode *
--------------------------------------------------------------------------------
Name State Scanning
--------------------------------------------------------------------------------
wlan1 connected
[iwd]#
...但我顯然錯過了一些非常基本的東西。
有人能指出我正確的方向嗎?
回答我自己的問題以幫助任何會在這里絆倒的人:
事實證明,iwd 和 connman 存儲庫都在子目錄“test”中提供了完整的 python3 示例。
使這些適應我的特定需求被證明是微不足道的。
相關目錄可以在這里 (iwd)和這里 (connman) 找到。
我的具體問題的解決方案是在以下腳本中: scan-for-networks和list-known-networks 。
掃描網絡:
#!/usr/bin/python3
import sys
import dbus
if (len(sys.argv) != 2):
print("Usage: %s <device>" % (sys.argv[0]))
sys.exit(1)
bus = dbus.SystemBus()
device = dbus.Interface(bus.get_object("net.connman.iwd", sys.argv[1]),
"net.connman.iwd.Station")
device.Scan()
list_known_networks:
#!/usr/bin/python3
import sys
import dbus
bus = dbus.SystemBus()
manager = dbus.Interface(bus.get_object('net.connman.iwd', '/'),
'org.freedesktop.DBus.ObjectManager')
forget = None
if len(sys.argv) >= 4 and sys.argv[1] == 'forget':
forget = (sys.argv[2], sys.argv[3])
print('Known Networks:')
for path, interfaces in manager.GetManagedObjects().items():
if 'net.connman.iwd.KnownNetwork' not in interfaces:
continue
network = interfaces['net.connman.iwd.KnownNetwork']
if (network['Name'], network['Type']) == forget:
obj = dbus.Interface(bus.get_object('net.connman.iwd', path),
'net.connman.iwd.KnownNetwork')
obj.Forget()
continue
print("[ %s ]" % network['Name'])
for key in network:
val = network[key]
if type(val) == dbus.Boolean:
val = 'True' if val else 'False'
print(" %s = %s" % (key, val))
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