我正在尝试通过Python firewalld模块控制dbus

我想为当前的运行时以及永久配置添加一个IP地址到受信任的区域。

这是firewalld的dbus接口的文档:
http://manpages.ubuntu.com/manpages/wily/man5/firewalld.dbus.5.html

什么有效:运行时配置

我可以将其添加到运行时配置中:

def trustIP(ip):
    ''' firewalld must already be running '''
    from dbus import SystemBus
    bus = SystemBus()
    runtimeProxy = bus.get_object('org.fedoraproject.FirewallD1',
                                 '/org/fedoraproject/FirewallD1')
    runtimeProxy.addSource('trusted', ip)


很简单

什么不起作用:永久配置

事实证明,将其添加到永久配置更加困难。到目前为止,这是我已经尝试过的交互方式:

>>> from dbus import SystemBus
>>> bus = SystemBus()

# First I need to find out which object is for the trusted zone...
>>> config = bus.get_object('org.fedoraproject.FirewallD1',
                           '/org/fedoraproject/FirewallD1/config')
>>> config.getZoneByName('trusted')
dbus.ObjectPath('/org/fedoraproject/FirewallD1/config/zone/7')

>>> permanentProxy = bus.get_object('org.fedoraproject.FirewallD1',
                                   '/org/fedoraproject/FirewallD1/config/zone/7')

# A quick check to make sure I have the right object:
>>> permanentProxy.getShort()
dbus.String(u'Trusted')

# Exactly what I expected, so move on and...
>>> permanentProxy.addSource('aaa.xxx.yyy.zzz')  # Actual ip removed...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib64/python2.7/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException:
    org.freedesktop.DBus.Python.dbus.exceptions.DBusException:
        dbus_to_python() takes exactly 1 argument (2 given)


我还尝试检查permanentProxy.getDescription(),它返回了应有的描述,并且尝试了permanentProxy.setDescription('test'),该失败并导致与permanentProxy.addSource('aaa.xxx.yyy.zzz')完全相同的堆栈跟踪。

我会得出一个结论,即该错误位于python dbus模块中,并假定它以某种方式无法正确处理参数,除了runtimeProxy.addSource('trusted', ip)包含两个参数并且可以正常工作的事实。 config.getZoneByName('trusted')甚至具有与permanentProxy.addSource('aaa.xxx.yyy.zzz')`相同的签名,并且只有一个字符串,并且可以正常工作。

所以也许我缺少某种奇怪的东西?但是我不知道那会是什么...

我尝试过的更多东西没有成功

我考虑了可能完全不使用字符串参数调用addSource并可能以某种方式咖喱的可能性,因此我尝试了以下方法:

>>> permanentProxy.addSource()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib64/python2.7/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.TypeError: Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/slip/dbus/service.py", line 123, in reply_handler
    result = method(self, *p, **k)
TypeError: addSource() takes at least 2 arguments (2 given)


现在这甚至更奇怪了。我在另一个回溯中有一个回溯,坚持我需要传递至少两个参数,还说我给了它两个参数(实际上我只给了一个,所以怎么样想出两个吗?)

我尝试过的其他一些尝试均未成功:

>>> permanentProxy.addSource(dbus_interface='org.fedoraproject.FirewallD1.config.zone')
ERROR:dbus.connection:Unable to set arguments () according to signature u's': <type 'exceptions.TypeError'>: More items found in D-Bus signature than in Python arguments
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib64/python2.7/site-packages/dbus/connection.py", line 641, in call_blocking
    message.append(signature=signature, *args)
TypeError: More items found in D-Bus signature than in Python arguments

>>> permanentProxy.addSource('aaa.xxx.yyy.zzz', dbus_interface='org.fedoraproject.FirewallD1.config.zone')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib64/python2.7/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException:
    org.freedesktop.DBus.Python.dbus.exceptions.DBusException:
        dbus_to_python() takes exactly 1 argument (2 given)

>>> from dbus import Interface
>>> Interface(permanentProxy, 'org.fedoraproject.FirewallD1.config.zone').addSource('aaa.xxx.yyy.zzz')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib64/python2.7/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException:
    org.freedesktop.DBus.Python.dbus.exceptions.DBusException:
        dbus_to_python() takes exactly 1 argument (2 given)


加!

这确实看起来像是dbus中的错误……某种程度上,它最初是错误地解决了addSource并认为它需要较少的参数,但是如果给它较少的参数,它将通过该错误的检查,然后它会正确解决并失败,因为您的参数不匹配。

无论如何,这是我的理论。有人看到我没有的东西吗?如果确实存在此错误,是否有某种方法可以解决此错误? IE ...我可以在dbus上使用某种内部方法来强制它调用正确的方法吗?

最佳答案

以下对我有用:

>>> import dbus
>>> bus = dbus.SystemBus()
>>> config = bus.get_object('org.fedoraproject.FirewallD1',
...                            '/org/fedoraproject/FirewallD1/config')
>>> path = config.getZoneByName('trusted')
>>> zone = bus.get_object('org.fedoraproject.FirewallD1', path)
>>> zone.addSource('192.168.1.0/24')


此时,如果查看/etc/firewalld/zones/trusted.xml,则可以看到已按预期添加了源地址:

<?xml version="1.0" encoding="utf-8"?>
<zone target="ACCEPT">
  <short>Trusted</short>
  <description>All network connections are accepted.</description>
  <interface name="docker0"/>
  <interface name="virbr0"/>
  <source address="192.168.1.0/24"/>
</zone>


...表明我已经成功更改了持久配置。

如果我在第二个get_object调用中使用文字路径而不是config.getZoneByName的返回值,则以上内容也适用。

为了它的价值,我正在跑步:


浅顶软呢帽23
Firewalld-0.3.14.2-4.fc23.noarch
dbus-1.10.6-1.fc23.x86_64
dbus-python-1.2.0-12.fc23.x86_64


更新

您没有看到任何新内容,因为您使用的是CentOS,而不是Fedora。解决此特定任务的最简单方法似乎是使用FirewallD随附的firewall python模块。以下内容适用于CentOS 7:

>>> from firewall.client import *
>>> client = FirewallClient()
>>> zone = client.config().getZoneByName('public')
>>> settings = zone.getSettings()
>>> settings.addSource('192.168.1.0/24')
>>> zone.update(settings)


另一个更新

浏览源代码到firewall.client模块,您可以通过如下所示的直接dbus进行此操作:

>>> zone = bus.get_object('org.fedoraproject.FirewallD1', path)
>>> settings = zone.getSettings()
>>> settings[11].append('192.168.20.0/24')
>>> zone.update(settings)


这在CentOS下也可以正常工作...但是使用firewall模块要好得多。

关于python - dbus_to_python()正好接受1个参数?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/34424037/

10-15 08:35