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authorChristian Breunig <christian@breunig.cc>2023-12-30 23:25:20 +0100
committerChristian Breunig <christian@breunig.cc>2023-12-31 23:49:48 +0100
commit4ef110fd2c501b718344c72d495ad7e16d2bd465 (patch)
treee98bf08f93c029ec4431a3b6ca078e7562e0cc58 /src/conf_mode/interfaces_pppoe.py
parent2286b8600da6c631b17e1d5b9b341843e50f9abf (diff)
downloadvyos-1x-4ef110fd2c501b718344c72d495ad7e16d2bd465.tar.gz
vyos-1x-4ef110fd2c501b718344c72d495ad7e16d2bd465.zip
T5474: establish common file name pattern for XML conf mode commands
We will use _ as CLI level divider. The XML definition filename and also the Python helper should match the CLI node. Example: set interfaces ethernet -> interfaces_ethernet.xml.in set interfaces bond -> interfaces_bond.xml.in set service dhcp-server -> service_dhcp-server-xml.in
Diffstat (limited to 'src/conf_mode/interfaces_pppoe.py')
-rwxr-xr-xsrc/conf_mode/interfaces_pppoe.py148
1 files changed, 148 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces_pppoe.py b/src/conf_mode/interfaces_pppoe.py
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+++ b/src/conf_mode/interfaces_pppoe.py
@@ -0,0 +1,148 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019-2021 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 copy import deepcopy
+from netifaces import interfaces
+
+from vyos.config import Config
+from vyos.configdict import get_interface_dict
+from vyos.configdict import is_node_changed
+from vyos.configdict import get_pppoe_interfaces
+from vyos.configverify import verify_authentication
+from vyos.configverify import verify_source_interface
+from vyos.configverify import verify_interface_exists
+from vyos.configverify import verify_vrf
+from vyos.configverify import verify_mtu_ipv6
+from vyos.configverify import verify_mirror_redirect
+from vyos.ifconfig import PPPoEIf
+from vyos.template import render
+from vyos.utils.process import call
+from vyos.utils.process import is_systemd_service_running
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+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', 'pppoe']
+ ifname, pppoe = get_interface_dict(conf, base)
+
+ # We should only terminate the PPPoE session if critical parameters change.
+ # All parameters that can be changed on-the-fly (like interface description)
+ # should not lead to a reconnect!
+ for options in ['access-concentrator', 'connect-on-demand', 'service-name',
+ 'source-interface', 'vrf', 'no-default-route',
+ 'authentication', 'host_uniq']:
+ if is_node_changed(conf, base + [ifname, options]):
+ pppoe.update({'shutdown_required': {}})
+ # bail out early - no need to further process other nodes
+ break
+
+ if 'deleted' not in pppoe:
+ # We always set the MRU value to the MTU size. This code path only re-creates
+ # the old behavior if MRU is not set on the CLI.
+ if 'mru' not in pppoe:
+ pppoe['mru'] = pppoe['mtu']
+
+ return pppoe
+
+def verify(pppoe):
+ if 'deleted' in pppoe:
+ # bail out early
+ return None
+
+ verify_source_interface(pppoe)
+ verify_authentication(pppoe)
+ verify_vrf(pppoe)
+ verify_mtu_ipv6(pppoe)
+ verify_mirror_redirect(pppoe)
+
+ if {'connect_on_demand', 'vrf'} <= set(pppoe):
+ raise ConfigError('On-demand dialing and VRF can not be used at the same time')
+
+ # both MTU and MRU have default values, thus we do not need to check
+ # if the key exists
+ if int(pppoe['mru']) > int(pppoe['mtu']):
+ raise ConfigError('PPPoE MRU needs to be lower then MTU!')
+
+ return None
+
+def generate(pppoe):
+ # set up configuration file path variables where our templates will be
+ # rendered into
+ ifname = pppoe['ifname']
+ config_pppoe = f'/etc/ppp/peers/{ifname}'
+
+ if 'deleted' in pppoe or 'disable' in pppoe:
+ if os.path.exists(config_pppoe):
+ os.unlink(config_pppoe)
+
+ return None
+
+ # Create PPP configuration files
+ render(config_pppoe, 'pppoe/peer.j2', pppoe, permission=0o640)
+
+ return None
+
+def apply(pppoe):
+ ifname = pppoe['ifname']
+ if 'deleted' in pppoe or 'disable' in pppoe:
+ if os.path.isdir(f'/sys/class/net/{ifname}'):
+ p = PPPoEIf(ifname)
+ p.remove()
+ call(f'systemctl stop ppp@{ifname}.service')
+ return None
+
+ # reconnect should only be necessary when certain config options change,
+ # like ACS name, authentication ... (see get_config() for details)
+ if ((not is_systemd_service_running(f'ppp@{ifname}.service')) or
+ 'shutdown_required' in pppoe):
+
+ # cleanup system (e.g. FRR routes first)
+ if os.path.isdir(f'/sys/class/net/{ifname}'):
+ p = PPPoEIf(ifname)
+ p.remove()
+
+ call(f'systemctl restart ppp@{ifname}.service')
+ # When interface comes "live" a hook is called:
+ # /etc/ppp/ip-up.d/99-vyos-pppoe-callback
+ # which triggers PPPoEIf.update()
+ else:
+ if os.path.isdir(f'/sys/class/net/{ifname}'):
+ p = PPPoEIf(ifname)
+ p.update(pppoe)
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)