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/