从python访问iwd-dbus接口

Question

我正在尝试使用python3-dbus包来控制嵌入式Linux目标上的无线(如果重要的话，请使用mips MT7628(。

系统很可能设置正确，因为我已经在这个嵌入式目标上启动并运行了iwd+dhclient。

我可以通过eth0和wlan0进行连接。

我还可以通过iwctl控制iwd。到目前为止还不错。

我现在需要从python3控制iwd；特别是，我需要能够通过串行线发送扫描结果(真正的目标，而不是我的开发板，将是无头的(。

我对dbus接口不知所措。我需要从一些例子开始。

我尝试了一些类似的东西：

# 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
>>> 

当WiFi工作时：

# 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]# 

但我显然错过了一些非常基本的东西。

有人能给我指正确的方向吗？

Answer 1

回答我自己的问题，帮助任何在这里绊倒的人：

事实证明，iwd和connman存储库都在子目录"test"中提供了完整的python3示例。

根据我的具体需求进行调整证明是微不足道的。

相关目录可在此处(iwd(和此处(connman(找到。

我的具体问题的解决方案在以下脚本中：扫描网络并列出已知网络。

扫描网络：

#!/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))