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120 lines
3.5 KiB
120 lines
3.5 KiB
#
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# Copyright (c) 2013 Nicolas PLANEL <nicolas.planel@enovance.com>
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#
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"""BRIDGE network link
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"""
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from __future__ import absolute_import
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from ... import core as netlink
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from .. import capi as capi
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class BRIDGELink(object):
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def __init__(self, link):
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self._link = link
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self._has_ext_info = capi.rtnl_link_bridge_has_ext_info(self._link)
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self._port_state_values = ['disabled','listening','learning','forwarding','blocking']
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def bridge_assert_ext_info(self):
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if self._has_ext_info == False:
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print """
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Please update your kernel to be able to call this method.
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Your current kernel bridge version is too old to support this extention.
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"""
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raise RuntimeWarning()
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def port_state2str(self, state):
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return self._port_state_values[state]
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def str2port_state(self, str):
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for value, port in enumerate(self._port_state_values):
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if str.lower() == port:
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return value
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raise ValueError()
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@property
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@netlink.nlattr(type=int)
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def port_state(self):
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"""bridge state :
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%s
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""" % (self.port_state)
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return capi.rtnl_link_bridge_get_state(self._link)
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@port_state.setter
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def port_state(self, state):
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capi.rtnl_link_bridge_set_state(self._link, int(state))
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@property
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@netlink.nlattr(type=int)
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def priority(self):
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"""bridge prio
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"""
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bridge_assert_ext_info()
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return capi.rtnl_link_bridge_get_prio(self._link)
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@priority.setter
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def priority(self, prio):
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bridge_assert_ext_info()
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if prio < 0 or prio >= 2**16:
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raise ValueError()
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capi.rtnl_link_bridge_set_prio(self._link, int(prio))
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@property
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@netlink.nlattr(type=int)
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def cost(self):
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"""bridge prio
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"""
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bridge_assert_ext_info()
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return capi.rtnl_link_bridge_get_cost(self._link)
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@cost.setter
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def cost(self, cost):
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bridge_assert_ext_info()
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if cost < 0 or cost >= 2**32:
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raise ValueError()
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capi.rtnl_link_bridge_set_cost(self._link, int(cost))
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@property
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@netlink.nlattr(type=str)
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def flags(self):
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""" BRIDGE flags
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Setting this property will *Not* reset flags to value you supply in
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Examples:
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link.flags = '+xxx' # add xxx flag
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link.flags = 'xxx' # exactly the same
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link.flags = '-xxx' # remove xxx flag
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link.flags = [ '+xxx', '-yyy' ] # list operation
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"""
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self.bridge_assert_ext_info()
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flags = capi.rtnl_link_bridge_get_flags(self._link)
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return capi.rtnl_link_bridge_flags2str(flags, 256)[0].split(',')
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def _set_flag(self, flag):
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if flag.startswith('-'):
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i = capi.rtnl_link_bridge_str2flags(flag[1:])
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capi.rtnl_link_bridge_unset_flags(self._link, i)
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elif flag.startswith('+'):
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i = capi.rtnl_link_bridge_str2flags(flag[1:])
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capi.rtnl_link_bridge_set_flags(self._link, i)
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else:
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i = capi.rtnl_link_bridge_str2flags(flag)
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capi.rtnl_link_bridge_set_flags(self._link, i)
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@flags.setter
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def flags(self, value):
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self.bridge_assert_ext_info()
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if type(value) is list:
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for flag in value:
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self._set_flag(flag)
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else:
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self._set_flag(value)
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def brief(self):
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return 'bridge-has-ext-info {0}'.format(self._has_ext_info)
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def init(link):
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link.bridge = BRIDGELink(link._rtnl_link)
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return link.bridge
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