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# Copyright 2022 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
from vyos.qos.base import QoSBase
class RoundRobin(QoSBase):
_parent = 1
# https://man7.org/linux/man-pages/man8/tc-drr.8.html
def update(self, config, direction):
tmp = f'tc qdisc add dev {self._interface} root handle 1: drr'
self._cmd(tmp)
if 'class' in config:
for cls in config['class']:
cls = int(cls)
tmp = f'tc class add dev {self._interface} parent 1:1 classid 1:{cls:x} drr'
self._cmd(tmp)
tmp = f'tc qdisc add dev {self._interface} parent 1:{cls:x} pfifo'
self._cmd(tmp)
if 'default' in config:
class_id_max = self._get_class_max_id(config)
default_cls_id = int(class_id_max) +1
# class ID via CLI is in range 1-4095, thus 1000 hex = 4096
tmp = f'tc class add dev {self._interface} parent 1:1 classid 1:{default_cls_id:x} drr'
self._cmd(tmp)
# call base class
super().update(config, direction, priority=True)
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