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# Copyright 2019 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/>.
import os
import re
from vyos.ifconfig.interface import Interface
class VLANIf(Interface):
"""
This class handels the creation and removal of a VLAN interface. It serves
as base class for BondIf and EthernetIf.
"""
default = {
'type': 'vlan',
}
def __init__(self, ifname, **kargs):
super().__init__(ifname, **kargs)
def remove(self):
"""
Remove interface from operating system. Removing the interface
deconfigures all assigned IP addresses and clear possible DHCP(v6)
client processes.
Example:
>>> from vyos.ifconfig import Interface
>>> i = Interface('eth0')
>>> i.remove()
"""
# Do we have sub interfaces (VLANs)? We apply a regex matching
# subinterfaces (indicated by a .) of a parent interface.
#
# As interfaces need to be deleted "in order" starting from Q-in-Q
# we delete them first.
vlan_ifs = [f for f in os.listdir(r'/sys/class/net')
if re.match(self.config['ifname'] + r'(?:\.\d+)(?:\.\d+)', f)]
for vlan in vlan_ifs:
Interface(vlan).remove()
# After deleting all Q-in-Q interfaces delete other VLAN interfaces
# which probably acted as parent to Q-in-Q or have been regular 802.1q
# interface.
vlan_ifs = [f for f in os.listdir(r'/sys/class/net')
if re.match(self.config['ifname'] + r'(?:\.\d+)', f)]
for vlan in vlan_ifs:
Interface(vlan).remove()
# All subinterfaces are now removed, continue on the physical interface
super().remove()
def add_vlan(self, vlan_id, ethertype='', ingress_qos='', egress_qos=''):
"""
A virtual LAN (VLAN) is any broadcast domain that is partitioned and
isolated in a computer network at the data link layer (OSI layer 2).
Use this function to create a new VLAN interface on a given physical
interface.
This function creates both 802.1q and 802.1ad (Q-in-Q) interfaces. Proto
parameter is used to indicate VLAN type.
A new object of type VLANIf is returned once the interface has been
created.
@param ethertype: If specified, create 802.1ad or 802.1q Q-in-Q VLAN
interface
@param ingress_qos: Defines a mapping of VLAN header prio field to the
Linux internal packet priority on incoming frames.
@param ingress_qos: Defines a mapping of Linux internal packet priority
to VLAN header prio field but for outgoing frames.
Example:
>>> from vyos.ifconfig import VLANIf
>>> i = VLANIf('eth0')
>>> i.add_vlan(10)
"""
vlan_ifname = self.config['ifname'] + '.' + str(vlan_id)
if not os.path.exists('/sys/class/net/{}'.format(vlan_ifname)):
self._vlan_id = int(vlan_id)
if ethertype:
self._ethertype = ethertype
ethertype = 'proto {}'.format(ethertype)
# Optional ingress QOS mapping
opt_i = ''
if ingress_qos:
opt_i = 'ingress-qos-map ' + ingress_qos
# Optional egress QOS mapping
opt_e = ''
if egress_qos:
opt_e = 'egress-qos-map ' + egress_qos
# create interface in the system
cmd = 'ip link add link {ifname} name {ifname}.{vlan} type vlan {proto} id {vlan} {opt_e} {opt_i}' \
.format(ifname=self.config['ifname'], vlan=self._vlan_id, proto=ethertype, opt_e=opt_e, opt_i=opt_i)
self._cmd(cmd)
# return new object mapping to the newly created interface
# we can now work on this object for e.g. IP address setting
# or interface description and so on
return VLANIf(vlan_ifname)
def del_vlan(self, vlan_id):
"""
Remove VLAN interface from operating system. Removing the interface
deconfigures all assigned IP addresses and clear possible DHCP(v6)
client processes.
Example:
>>> from vyos.ifconfig import VLANIf
>>> i = VLANIf('eth0.10')
>>> i.del_vlan()
"""
vlan_ifname = self.config['ifname'] + '.' + str(vlan_id)
VLANIf(vlan_ifname).remove()
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