diff options
Diffstat (limited to 'src/conf_mode/interfaces_l2tpv3.py')
-rwxr-xr-x | src/conf_mode/interfaces_l2tpv3.py | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces_l2tpv3.py b/src/conf_mode/interfaces_l2tpv3.py new file mode 100755 index 000000000..e1db3206e --- /dev/null +++ b/src/conf_mode/interfaces_l2tpv3.py @@ -0,0 +1,112 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2019-2020 VyOS maintainers and contributors +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License version 2 or later as +# published by the Free Software Foundation. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +import os + +from sys import exit +from netifaces import interfaces + +from vyos.config import Config +from vyos.configdict import get_interface_dict +from vyos.configdict import leaf_node_changed +from vyos.configverify import verify_address +from vyos.configverify import verify_bridge_delete +from vyos.configverify import verify_mtu_ipv6 +from vyos.configverify import verify_mirror_redirect +from vyos.configverify import verify_bond_bridge_member +from vyos.ifconfig import L2TPv3If +from vyos.utils.kernel import check_kmod +from vyos.utils.network import is_addr_assigned +from vyos import ConfigError +from vyos import airbag +airbag.enable() + +k_mod = ['l2tp_eth', 'l2tp_netlink', 'l2tp_ip', 'l2tp_ip6'] + +def get_config(config=None): + """ + Retrive CLI config as dictionary. Dictionary can never be empty, as at least the + interface name will be added or a deleted flag + """ + if config: + conf = config + else: + conf = Config() + base = ['interfaces', 'l2tpv3'] + ifname, l2tpv3 = get_interface_dict(conf, base) + + # To delete an l2tpv3 interface we need the current tunnel and session-id + if 'deleted' in l2tpv3: + tmp = leaf_node_changed(conf, base + [ifname, 'tunnel-id']) + # leaf_node_changed() returns a list + l2tpv3.update({'tunnel_id': tmp[0]}) + + tmp = leaf_node_changed(conf, base + [ifname, 'session-id']) + l2tpv3.update({'session_id': tmp[0]}) + + return l2tpv3 + +def verify(l2tpv3): + if 'deleted' in l2tpv3: + verify_bridge_delete(l2tpv3) + return None + + interface = l2tpv3['ifname'] + + for key in ['source_address', 'remote', 'tunnel_id', 'peer_tunnel_id', + 'session_id', 'peer_session_id']: + if key not in l2tpv3: + tmp = key.replace('_', '-') + raise ConfigError(f'Missing mandatory L2TPv3 option: "{tmp}"!') + + if not is_addr_assigned(l2tpv3['source_address']): + raise ConfigError('L2TPv3 source-address address "{source_address}" ' + 'not configured on any interface!'.format(**l2tpv3)) + + verify_mtu_ipv6(l2tpv3) + verify_address(l2tpv3) + verify_bond_bridge_member(l2tpv3) + verify_mirror_redirect(l2tpv3) + return None + +def generate(l2tpv3): + return None + +def apply(l2tpv3): + # Check if L2TPv3 interface already exists + if l2tpv3['ifname'] in interfaces(): + # L2TPv3 is picky when changing tunnels/sessions, thus we can simply + # always delete it first. + l = L2TPv3If(**l2tpv3) + l.remove() + + if 'deleted' not in l2tpv3: + # Finally create the new interface + l = L2TPv3If(**l2tpv3) + l.update(l2tpv3) + + return None + +if __name__ == '__main__': + try: + check_kmod(k_mod) + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |