# 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 NetEm(QoSBase): # https://man7.org/linux/man-pages/man8/tc-netem.8.html def update(self, config, direction): tmp = f'tc qdisc add dev {self._interface} root netem' if 'bandwidth' in config: rate = self._rate_convert(config["bandwidth"]) tmp += f' rate {rate}' if 'queue_limit' in config: limit = config["queue_limit"] tmp += f' limit {limit}' if 'delay' in config: delay = config["delay"] tmp += f' delay {delay}ms' if 'loss' in config: drop = config["loss"] tmp += f' drop {drop}%' if 'corruption' in config: corrupt = config["corruption"] tmp += f' corrupt {corrupt}%' if 'reordering' in config: reorder = config["reordering"] tmp += f' reorder {reorder}%' if 'duplicate' in config: duplicate = config["duplicate"] tmp += f' duplicate {duplicate}%' self._cmd(tmp) # call base class super().update(config, direction)