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pppoe.py
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# Copyright 2020-2021 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
from vyos.util import get_interface_config
@Interface.register
class PPPoEIf(Interface):
iftype = 'pppoe'
definition = {
**Interface.definition,
**{
'section': 'pppoe',
'prefixes': ['pppoe', ],
},
}
def _remove_routes(self, vrf=''):
# Always delete default routes when interface is removed
if vrf:
vrf = f'-c "vrf {vrf}"'
self._cmd(f'vtysh -c "conf t" {vrf} -c "no ip route 0.0.0.0/0 {self.ifname} tag 210"')
self._cmd(f'vtysh -c "conf t" {vrf} -c "no ipv6 route ::/0 {self.ifname} tag 210"')
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('pppoe0')
>>> i.remove()
"""
tmp = get_interface_config(self.ifname)
vrf = ''
if 'master' in tmp:
self._remove_routes(tmp['master'])
# remove bond master which places members in disabled state
super().remove()
def _create(self):
# we can not create this interface as it is managed outside
pass
def _delete(self):
# we can not create this interface as it is managed outside
pass
def del_addr(self, addr):
# we can not create this interface as it is managed outside
pass
def get_mac(self):
""" Get a synthetic MAC address. """
return self.get_mac_synthetic()
def update(self, config):
""" General helper function which works on a dictionary retrived by
get_config_dict(). It's main intention is to consolidate the scattered
interface setup code and provide a single point of entry when workin
on any interface. """
# remove old routes from an e.g. old VRF assignment
vrf = ''
if 'vrf_old' in config:
vrf = config['vrf_old']
self._remove_routes(vrf)
# DHCPv6 PD handling is a bit different on PPPoE interfaces, as we do
# not require an 'address dhcpv6' CLI option as with other interfaces
if 'dhcpv6_options' in config and 'pd' in config['dhcpv6_options']:
self.set_dhcpv6(True)
else:
self.set_dhcpv6(False)
super().update(config)
if 'default_route' not in config or config['default_route'] == 'none':
return
#
# Set default routes pointing to pppoe interface
#
vrf = ''
sed_opt = '^ip route'
install_v4 = True
install_v6 = True
# generate proper configuration string when VRFs are in use
if 'vrf' in config:
tmp = config['vrf']
vrf = f'-c "vrf {tmp}"'
sed_opt = f'vrf {tmp}'
if config['default_route'] == 'auto':
# only add route if there is no default route present
tmp = self._cmd(f'vtysh -c "show running-config staticd no-header" | sed -n "/{sed_opt}/,/!/p"')
for line in tmp.splitlines():
line = line.lstrip()
if line.startswith('ip route 0.0.0.0/0'):
install_v4 = False
continue
if 'ipv6' in config and line.startswith('ipv6 route ::/0'):
install_v6 = False
continue
elif config['default_route'] == 'force':
# Force means that all static routes are replaced with the ones from this interface
tmp = self._cmd(f'vtysh -c "show running-config staticd no-header" | sed -n "/{sed_opt}/,/!/p"')
for line in tmp.splitlines():
if self.ifname in line:
# It makes no sense to remove a route with our interface and the later re-add it.
# This will only make traffic disappear - which is a no-no!
continue
line = line.lstrip()
if line.startswith('ip route 0.0.0.0/0'):
self._cmd(f'vtysh -c "conf t" {vrf} -c "no {line}"')
if 'ipv6' in config and line.startswith('ipv6 route ::/0'):
self._cmd(f'vtysh -c "conf t" {vrf} -c "no {line}"')
if install_v4:
self._cmd(f'vtysh -c "conf t" {vrf} -c "ip route 0.0.0.0/0 {self.ifname} tag 210"')
if install_v6 and 'ipv6' in config:
self._cmd(f'vtysh -c "conf t" {vrf} -c "ipv6 route ::/0 {self.ifname} tag 210"')

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