# 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.ifconfig.interface import Interface @Interface.register class VethIf(Interface): """ Abstraction of a Linux veth interface """ iftype = 'veth' definition = { **Interface.definition, **{ 'section': 'virtual-ethernet', 'prefixes': ['veth', ], 'bridgeable': True, }, } def _create(self): """ Create veth interface in OS kernel. Interface is administrative down by default. """ # check before create, as we have 2 veth interfaces in our CLI # interface virtual-ethernet veth0 peer-name 'veth1' # interface virtual-ethernet veth1 peer-name 'veth0' # # but iproute2 creates the pair with one command: # ip link add vet0 type veth peer name veth1 if self.exists(self.config['peer_name']): return # create virtual-ethernet interface cmd = 'ip link add {ifname} type {type}'.format(**self.config) cmd += f' peer name {self.config["peer_name"]}' self._cmd(cmd) # interface is always A/D down. It needs to be enabled explicitly self.set_admin_state('down')