#!/usr/bin/env python3 # # Copyright (C) 2018-2021 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 psutil import process_iter from vyos.config import Config from vyos.template import render from vyos.utils.process import call from vyos import ConfigError config_file = '/run/conserver/conserver.cf' dropbear_systemd_file = '/run/systemd/system/dropbear@{port}.service.d/override.conf' def get_config(config=None): if config: conf = config else: conf = Config() base = ['service', 'console-server'] # Retrieve CLI representation as dictionary proxy = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True) # The retrieved dictionary will look something like this: # # {'device': {'usb0b2.4p1.0': {'speed': '9600'}, # 'usb0b2.4p1.1': {'data_bits': '8', # 'parity': 'none', # 'speed': '115200', # 'stop_bits': '2'}}} # We have gathered the dict representation of the CLI, but there are default # options which we need to update into the dictionary retrived. proxy = conf.merge_defaults(proxy, recursive=True) return proxy def verify(proxy): if not proxy: return None aliases = [] processes = process_iter(['name', 'cmdline']) if 'device' in proxy: for device, device_config in proxy['device'].items(): for process in processes: if 'agetty' in process.name() and device in process.cmdline(): raise ConfigError(f'Port "{device}" already provides a '\ 'console used by "system console"!') if 'speed' not in device_config: raise ConfigError(f'Port "{device}" requires speed to be set!') if 'ssh' in device_config and 'port' not in device_config['ssh']: raise ConfigError(f'Port "{device}" requires SSH port to be set!') if 'alias' in device_config: if device_config['alias'] in aliases: raise ConfigError("Console aliases must be unique") else: aliases.append(device_config['alias']) return None def generate(proxy): if not proxy: return None render(config_file, 'conserver/conserver.conf.j2', proxy) if 'device' in proxy: for device, device_config in proxy['device'].items(): if 'ssh' not in device_config: continue tmp = { 'device' : device, 'port' : device_config['ssh']['port'], } render(dropbear_systemd_file.format(**tmp), 'conserver/dropbear@.service.j2', tmp) return None def apply(proxy): call('systemctl daemon-reload') call('systemctl stop dropbear@*.service conserver-server.service') if not proxy: if os.path.isfile(config_file): os.unlink(config_file) return None call('systemctl restart conserver-server.service') if 'device' in proxy: for device, device_config in proxy['device'].items(): if 'ssh' not in device_config: continue port = device_config['ssh']['port'] call(f'systemctl restart dropbear@{port}.service') return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)