From 7dbaa25a199a781aaa9f269741547e576410cb11 Mon Sep 17 00:00:00 2001 From: Christian Breunig Date: Thu, 28 Mar 2024 07:36:22 +0100 Subject: op-mode: T6175: "renew dhcp interface " does not check for DHCP interface The current op-mode script simply calls sudo systemctl restart "dhclient@$4.service" with no additional information about a client interface at all. This results in useless dhclient processes root 47812 4.7 0.0 5848 3584 ? Ss 00:30 0:00 /sbin/dhclient -4 -d root 48121 0.0 0.0 4188 3072 ? S 00:30 0:00 \_ /bin/sh /sbin/dhclient-script root 48148 50.0 0.2 18776 11264 ? R 00:30 0:00 \_ python3 - Which also assign client leases to all local interfaces, if we receive one valid DHCPOFFER vyos@vyos:~$ show interfaces Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down Interface IP Address MAC VRF MTU S/L Description ----------- ----------------- ----------------- ------- ----- ----- ------------- eth0 - 00:50:56:bf:c5:6d default 1500 u/u eth0.10 172.16.33.102/24 00:50:56:bf:c5:6d default 1500 u/u eth1 172.16.33.131/24 00:50:56:b3:38:c5 default 1500 u/u 172.16.33.102/24 and 172.16.33.131/24 are stray DHCP addresses. This commit moved the renew command to the DHCP op-mode script to properly validate if the interface we request a renew for, has actually a dhcp address configured. In additional this exposes the renew feature to the API. --- src/op_mode/dhcp.py | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) (limited to 'src/op_mode') diff --git a/src/op_mode/dhcp.py b/src/op_mode/dhcp.py index d27e1baf7..a2f947400 100755 --- a/src/op_mode/dhcp.py +++ b/src/op_mode/dhcp.py @@ -1,6 +1,6 @@ #!/usr/bin/env python3 # -# Copyright (C) 2022-2023 VyOS maintainers and contributors +# Copyright (C) 2022-2024 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 @@ -33,6 +33,7 @@ from vyos.kea import kea_get_leases from vyos.kea import kea_get_pool_from_subnet_id from vyos.kea import kea_delete_lease from vyos.utils.process import is_systemd_service_running +from vyos.utils.process import call time_string = "%a %b %d %H:%M:%S %Z %Y" @@ -309,6 +310,25 @@ def _verify(func): return func(*args, **kwargs) return _wrapper +def _verify_client(func): + """Decorator checks if interface is configured as DHCP client""" + from functools import wraps + from vyos.ifconfig import Section + + @wraps(func) + def _wrapper(*args, **kwargs): + config = ConfigTreeQuery() + family = kwargs.get('family') + v = 'v6' if family == 'inet6' else '' + interface = kwargs.get('interface') + interface_path = Section.get_config_path(interface) + unconf_message = f'DHCP{v} client not configured on interface {interface}!' + + # Check if config does not exist + if not config.exists(f'interfaces {interface_path} address dhcp{v}'): + raise vyos.opmode.UnconfiguredSubsystem(unconf_message) + return func(*args, **kwargs) + return _wrapper @_verify def show_pool_statistics(raw: bool, family: ArgFamily, pool: typing.Optional[str]): @@ -474,6 +494,16 @@ def show_client_leases(raw: bool, family: ArgFamily, interface: typing.Optional[ else: return _get_formatted_client_leases(lease_data, family=family) +@_verify_client +def renew_client_lease(raw: bool, family: ArgFamily, interface: str): + if not raw: + v = 'v6' if family == 'inet6' else '' + print(f'Restarting DHCP{v} client on interface {interface}...') + if family == 'inet6': + call(f'systemctl restart dhcp6c@{interface}.service') + else: + call(f'systemctl restart dhclient@{interface}.service') + if __name__ == '__main__': try: res = vyos.opmode.run(sys.modules[__name__]) -- cgit v1.2.3