118 lines
3.5 KiB
Python
118 lines
3.5 KiB
Python
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#
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# Utility functions for network module
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#
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# Copyright (C) 2019 Red Hat, Inc.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions of
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# the GNU General Public License v.2, or (at your option) any later version.
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY expressed or implied, including the implied warranties of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details. You should have received a copy of the
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# GNU General Public License along with this program; if not, write to the
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# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
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# source code or documentation are not subject to the GNU General Public
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# License and may only be used or replicated with the express permission of
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# Red Hat, Inc.
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#
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import os
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import glob
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from functools import wraps
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from pyanaconda.core import util
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from pyanaconda.core.configuration.anaconda import conf
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from pyanaconda.core.regexes import IBFT_CONFIGURED_DEVICE_NAME
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from pyanaconda.anaconda_loggers import get_module_logger
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log = get_module_logger(__name__)
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# TODO move somewhwere
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# We duplicate this in dracut/parse-kickstart
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def get_s390_settings(devname):
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cfg = {
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'SUBCHANNELS': '',
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}
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subchannels = []
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for symlink in sorted(glob.glob("/sys/class/net/%s/device/cdev[0-9]*" % devname)):
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subchannels.append(os.path.basename(os.readlink(symlink)))
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if not subchannels:
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return cfg
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cfg['SUBCHANNELS'] = ','.join(subchannels)
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return cfg
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def prefix2netmask(prefix):
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""" Convert prefix (CIDR bits) to netmask """
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_bytes = []
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for _i in range(4):
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if prefix >= 8:
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_bytes.append(255)
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prefix -= 8
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else:
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_bytes.append(256 - 2 ** (8 - prefix))
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prefix = 0
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netmask = ".".join(str(byte) for byte in _bytes)
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return netmask
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def netmask2prefix(netmask):
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""" Convert netmask to prefix (CIDR bits) """
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prefix = 0
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while prefix < 33:
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if (prefix2netmask(prefix) == netmask):
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return prefix
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prefix += 1
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return prefix
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def get_default_route_iface(family="inet"):
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"""Get the device having default route.
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:return: the name of the network device having default route
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"""
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routes = util.execWithCapture("ip", ["-f", family, "route", "show"])
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if not routes:
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log.debug("Could not get default %s route device", family)
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return None
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for line in routes.split("\n"):
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if line.startswith("default"):
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parts = line.split()
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if len(parts) >= 5 and parts[3] == "dev":
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return parts[4]
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else:
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log.debug("Could not parse default %s route device", family)
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return None
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return None
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def guard_by_system_configuration(return_value):
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def wrap(function):
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@wraps(function)
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def wrapped(*args, **kwargs):
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if not conf.system.can_configure_network:
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log.debug("Network configuration is disabled on this system.")
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return return_value
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else:
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return function(*args, **kwargs)
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return wrapped
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return wrap
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def is_ibft_configured_device(iface):
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return IBFT_CONFIGURED_DEVICE_NAME.match(iface)
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def is_nbft_device(iface):
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return iface.startswith("nbft")
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