def _do_ethtool(self, cmd):
iface = self._get_iface_name()
data = cast(byref(cmd), c_void_p)
req = ifreq(ifr_name=iface, ifr_data=data)
if fcntl.ioctl(self._sk_fileno, SIOCETHTOOL, req, True):
raise RuntimeError('SIOCETHTOOL ioctl failed', cmd.cmd)
def _get_iface_name(self):
"""
:rtype : str
"""
# TODO: Should never be used. Also, re-create via netlink, and monitor that...
# generates race-condition, as interface name may be changed after calling this
# function and before using returned name
req = ifreq(ifr_ifindex=self.index)
if fcntl.ioctl(self._sk_fileno, SIOCGIFNAME, req, True):
raise RuntimeError('SIOCGIFNAME ioctl failed')
return req.ifr_name
