From 4ef110fd2c501b718344c72d495ad7e16d2bd465 Mon Sep 17 00:00:00 2001 From: Christian Breunig Date: Sat, 30 Dec 2023 23:25:20 +0100 Subject: 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 --- src/conf_mode/service_tftp-server.py | 142 +++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100755 src/conf_mode/service_tftp-server.py (limited to 'src/conf_mode/service_tftp-server.py') diff --git a/src/conf_mode/service_tftp-server.py b/src/conf_mode/service_tftp-server.py new file mode 100755 index 000000000..3ad346e2e --- /dev/null +++ b/src/conf_mode/service_tftp-server.py @@ -0,0 +1,142 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2018-2020 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 . + +import os +import stat +import pwd + +from copy import deepcopy +from glob import glob +from sys import exit + +from vyos.base import Warning +from vyos.config import Config +from vyos.configverify import verify_vrf +from vyos.template import render +from vyos.template import is_ipv4 +from vyos.utils.process import call +from vyos.utils.permission import chmod_755 +from vyos.utils.network import is_addr_assigned +from vyos import ConfigError +from vyos import airbag +airbag.enable() + +config_file = r'/etc/default/tftpd' + +def get_config(config=None): + if config: + conf = config + else: + conf = Config() + + base = ['service', 'tftp-server'] + if not conf.exists(base): + return None + + tftpd = conf.get_config_dict(base, key_mangling=('-', '_'), + get_first_key=True, + with_recursive_defaults=True) + return tftpd + +def verify(tftpd): + # bail out early - looks like removal from running config + if not tftpd: + return None + + # Configuring allowed clients without a server makes no sense + if 'directory' not in tftpd: + raise ConfigError('TFTP root directory must be configured!') + + if 'listen_address' not in tftpd: + raise ConfigError('TFTP server listen address must be configured!') + + for address, address_config in tftpd['listen_address'].items(): + if not is_addr_assigned(address): + Warning(f'TFTP server listen address "{address}" not ' \ + 'assigned to any interface!') + verify_vrf(address_config) + + return None + +def generate(tftpd): + # cleanup any available configuration file + # files will be recreated on demand + for i in glob(config_file + '*'): + os.unlink(i) + + # bail out early - looks like removal from running config + if tftpd is None: + return None + + idx = 0 + for address, address_config in tftpd['listen_address'].items(): + config = deepcopy(tftpd) + port = tftpd['port'] + if is_ipv4(address): + config['listen_address'] = f'{address}:{port} -4' + else: + config['listen_address'] = f'[{address}]:{port} -6' + + if 'vrf' in address_config: + config['vrf'] = address_config['vrf'] + + file = config_file + str(idx) + render(file, 'tftp-server/default.j2', config) + idx = idx + 1 + + return None + +def apply(tftpd): + # stop all services first - then we will decide + call('systemctl stop tftpd@*.service') + + # bail out early - e.g. service deletion + if tftpd is None: + return None + + tftp_root = tftpd['directory'] + if not os.path.exists(tftp_root): + os.makedirs(tftp_root) + chmod_755(tftp_root) + + # get UNIX uid for user 'tftp' + tftp_uid = pwd.getpwnam('tftp').pw_uid + tftp_gid = pwd.getpwnam('tftp').pw_gid + + # get UNIX uid for tftproot directory + dir_uid = os.stat(tftp_root).st_uid + dir_gid = os.stat(tftp_root).st_gid + + # adjust uid/gid of tftproot directory if files don't belong to user tftp + if (tftp_uid != dir_uid) or (tftp_gid != dir_gid): + os.chown(tftp_root, tftp_uid, tftp_gid) + + idx = 0 + for address in tftpd['listen_address']: + call(f'systemctl restart tftpd@{idx}.service') + idx = idx + 1 + + return None + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) -- cgit v1.2.3