#!/usr/bin/env python3 # # Copyright (C) 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 . import argparse import ipaddress import json import re import tabulate from vyos.config import Config from vyos.utils.process import cmd from vyos.utils.dict import dict_search_args def get_config_firewall(conf, hook=None, priority=None, ipv6=False, interfaces=True): config_path = ['firewall'] if hook: config_path += ['ipv6' if ipv6 else 'ipv4', hook] if priority: config_path += [priority] firewall = conf.get_config_dict(config_path, key_mangling=('-', '_'), get_first_key=True, no_tag_node_value_mangle=True) return firewall def get_nftables_details(hook, priority, ipv6=False): suffix = '6' if ipv6 else '' name_prefix = 'NAME6_' if ipv6 else 'NAME_' if hook == 'name' or hook == 'ipv6-name': command = f'sudo nft list chain ip{suffix} vyos_filter {name_prefix}{priority}' else: up_hook = hook.upper() command = f'sudo nft list chain ip{suffix} vyos_filter VYOS_{up_hook}_{priority}' try: results = cmd(command) except: return {} out = {} for line in results.split('\n'): comment_search = re.search(rf'{priority}[\- ](\d+|default-action)', line) if not comment_search: continue rule = {} rule_id = comment_search[1] counter_search = re.search(r'counter packets (\d+) bytes (\d+)', line) if counter_search: rule['packets'] = counter_search[1] rule['bytes'] = counter_search[2] rule['conditions'] = re.sub(r'(\b(counter packets \d+ bytes \d+|drop|reject|return|log)\b|comment "[\w\-]+")', '', line).strip() out[rule_id] = rule return out def output_firewall_name(hook, priority, firewall_conf, ipv6=False, single_rule_id=None): ip_str = 'IPv6' if ipv6 else 'IPv4' print(f'\n---------------------------------\n{ip_str} Firewall "{hook} {priority}"\n') details = get_nftables_details(hook, priority, ipv6) rows = [] if 'rule' in firewall_conf: for rule_id, rule_conf in firewall_conf['rule'].items(): if single_rule_id and rule_id != single_rule_id: continue if 'disable' in rule_conf: continue row = [rule_id, rule_conf['action'], rule_conf['protocol'] if 'protocol' in rule_conf else 'all'] if rule_id in details: rule_details = details[rule_id] row.append(rule_details.get('packets', 0)) row.append(rule_details.get('bytes', 0)) row.append(rule_details['conditions']) rows.append(row) if 'default_action' in firewall_conf and not single_rule_id: row = ['default', firewall_conf['default_action'], 'all'] if 'default-action' in details: rule_details = details['default-action'] row.append(rule_details.get('packets', 0)) row.append(rule_details.get('bytes', 0)) rows.append(row) if rows: header = ['Rule', 'Action', 'Protocol', 'Packets', 'Bytes', 'Conditions'] print(tabulate.tabulate(rows, header) + '\n') def output_firewall_name_statistics(hook, prior, prior_conf, ipv6=False, single_rule_id=None): ip_str = 'IPv6' if ipv6 else 'IPv4' print(f'\n---------------------------------\n{ip_str} Firewall "{hook} {prior}"\n') details = get_nftables_details(prior, ipv6) rows = [] if 'rule' in prior_conf: for rule_id, rule_conf in prior_conf['rule'].items(): if single_rule_id and rule_id != single_rule_id: continue if 'disable' in rule_conf: continue source_addr = dict_search_args(rule_conf, 'source', 'address') or '0.0.0.0/0' dest_addr = dict_search_args(rule_conf, 'destination', 'address') or '0.0.0.0/0' row = [rule_id] if rule_id in details: rule_details = details[rule_id] row.append(rule_details.get('packets', 0)) row.append(rule_details.get('bytes', 0)) else: row.append('0') row.append('0') row.append(rule_conf['action']) row.append(source_addr) row.append(dest_addr) rows.append(row) if 'default_action' in prior_conf and not single_rule_id: row = ['default'] if 'default-action' in details: rule_details = details['default-action'] row.append(rule_details.get('packets', 0)) row.append(rule_details.get('bytes', 0)) else: row.append('0') row.append('0') row.append(prior_conf['default_action']) row.append('0.0.0.0/0') # Source row.append('0.0.0.0/0') # Dest rows.append(row) if rows: header = ['Rule', 'Packets', 'Bytes', 'Action', 'Source', 'Destination'] print(tabulate.tabulate(rows, header) + '\n') def show_firewall(): print('Rulesets Information') conf = Config() firewall = get_config_firewall(conf) if not firewall: return if 'ipv4' in firewall: for hook, hook_conf in firewall['ipv4'].items(): for prior, prior_conf in firewall['ipv4'][hook].items(): output_firewall_name(hook, prior, prior_conf, ipv6=False) if 'ipv6' in firewall: for hook, hook_conf in firewall['ipv6'].items(): for prior, prior_conf in firewall['ipv6'][hook].items(): output_firewall_name(hook, prior, prior_conf, ipv6=True) def show_firewall_family(family): print(f'Rulesets {family} Information') conf = Config() firewall = get_config_firewall(conf) if not firewall: return for hook, hook_conf in firewall[family].items(): for prior, prior_conf in firewall[family][hook].items(): if family == 'ipv6': output_firewall_name(hook, prior, prior_conf, ipv6=True) else: output_firewall_name(hook, prior, prior_conf, ipv6=False) def show_firewall_name(hook, priority, ipv6=False): print('Ruleset Information') conf = Config() firewall = get_config_firewall(conf, hook, priority, ipv6) if firewall: output_firewall_name(hook, priority, firewall, ipv6) def show_firewall_rule(hook, priority, rule_id, ipv6=False): print('Rule Information') conf = Config() firewall = get_config_firewall(conf, hook, priority, ipv6) if firewall: output_firewall_name(hook, priority, firewall, ipv6, rule_id) def show_firewall_group(name=None): conf = Config() firewall = get_config_firewall(conf, interfaces=False) if 'group' not in firewall: return def find_references(group_type, group_name): out = [] family = [] if group_type in ['address_group', 'network_group']: family = ['ipv4'] elif group_type == 'ipv6_address_group': family = ['ipv6'] group_type = 'address_group' elif group_type == 'ipv6_network_group': family = ['ipv6'] group_type = 'network_group' else: family = ['ipv4', 'ipv6'] for item in family: for name_type in ['name', 'ipv6_name', 'forward', 'input', 'output']: if name_type not in firewall[item]: continue for name, name_conf in firewall[item][name_type].items(): if 'rule' not in name_conf: continue for rule_id, rule_conf in name_conf['rule'].items(): source_group = dict_search_args(rule_conf, 'source', 'group', group_type) dest_group = dict_search_args(rule_conf, 'destination', 'group', group_type) if source_group and group_name == source_group: out.append(f'{name}-{rule_id}') elif dest_group and group_name == dest_group: out.append(f'{name}-{rule_id}') return out header = ['Name', 'Type', 'References', 'Members'] rows = [] for group_type, group_type_conf in firewall['group'].items(): for group_name, group_conf in group_type_conf.items(): if name and name != group_name: continue references = find_references(group_type, group_name) row = [group_name, group_type, '\n'.join(references) or 'N/A'] if 'address' in group_conf: row.append("\n".join(sorted(group_conf['address']))) elif 'network' in group_conf: row.append("\n".join(sorted(group_conf['network'], key=ipaddress.ip_network))) elif 'mac_address' in group_conf: row.append("\n".join(sorted(group_conf['mac_address']))) elif 'port' in group_conf: row.append("\n".join(sorted(group_conf['port']))) else: row.append('N/A') rows.append(row) if rows: print('Firewall Groups\n') print(tabulate.tabulate(rows, header)) def show_summary(): print('Ruleset Summary') conf = Config() firewall = get_config_firewall(conf) if not firewall: return header = ['Ruleset Hook', 'Ruleset Priority', 'Description', 'References'] v4_out = [] v6_out = [] if 'ipv4' in firewall: for hook, hook_conf in firewall['ipv4'].items(): for prior, prior_conf in firewall['ipv4'][hook].items(): description = prior_conf.get('description', '') v4_out.append([hook, prior, description]) if 'ipv6' in firewall: for hook, hook_conf in firewall['ipv6'].items(): for prior, prior_conf in firewall['ipv6'][hook].items(): description = prior_conf.get('description', '') v6_out.append([hook, prior, description]) if v6_out: print('\nIPv6 Ruleset:\n') print(tabulate.tabulate(v6_out, header) + '\n') if v4_out: print('\nIPv4 Ruleset:\n') print(tabulate.tabulate(v4_out, header) + '\n') show_firewall_group() def show_statistics(): print('Rulesets Statistics') conf = Config() firewall = get_config_firewall(conf) if not firewall: return if 'ipv4' in firewall: for hook, hook_conf in firewall['ipv4'].items(): for prior, prior_conf in firewall['ipv4'][hook].items(): output_firewall_name_statistics(hook,prior, prior_conf, ipv6=False) if 'ipv6' in firewall: for hook, hook_conf in firewall['ipv6'].items(): for prior, prior_conf in firewall['ipv6'][hook].items(): output_firewall_name_statistics(hook,prior, prior_conf, ipv6=True) if __name__ == '__main__': parser = argparse.ArgumentParser() parser.add_argument('--action', help='Action', required=False) parser.add_argument('--name', help='Firewall name', required=False, action='store', nargs='?', default='') parser.add_argument('--family', help='IP family', required=False, action='store', nargs='?', default='') parser.add_argument('--hook', help='Firewall hook', required=False, action='store', nargs='?', default='') parser.add_argument('--priority', help='Firewall priority', required=False, action='store', nargs='?', default='') parser.add_argument('--rule', help='Firewall Rule ID', required=False) parser.add_argument('--ipv6', help='IPv6 toggle', action='store_true') args = parser.parse_args() if args.action == 'show': if not args.rule: show_firewall_name(args.hook, args.priority, args.ipv6) else: show_firewall_rule(args.hook, args.priority, args.rule, args.ipv6) elif args.action == 'show_all': show_firewall() elif args.action == 'show_family': show_firewall_family(args.family) elif args.action == 'show_group': show_firewall_group(args.name) elif args.action == 'show_statistics': show_statistics() elif args.action == 'show_summary': show_summary()