diff options
Diffstat (limited to 'src/conf_mode/conntrack.py')
| -rwxr-xr-x | src/conf_mode/conntrack.py | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/src/conf_mode/conntrack.py b/src/conf_mode/conntrack.py deleted file mode 100755 index 9c43640a9..000000000 --- a/src/conf_mode/conntrack.py +++ /dev/null @@ -1,161 +0,0 @@ -#!/usr/bin/env python3 -# -# Copyright (C) 2021-2023 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 -import re - -from sys import exit - -from vyos.config import Config -from vyos.firewall import find_nftables_rule -from vyos.firewall import remove_nftables_rule -from vyos.utils.process import process_named_running -from vyos.utils.dict import dict_search -from vyos.utils.process import cmd -from vyos.utils.process import run -from vyos.template import render -from vyos import ConfigError -from vyos import airbag -airbag.enable() - -conntrack_config = r'/etc/modprobe.d/vyatta_nf_conntrack.conf' -sysctl_file = r'/run/sysctl/10-vyos-conntrack.conf' -nftables_ct_file = r'/run/nftables-ct.conf' - -# Every ALG (Application Layer Gateway) consists of either a Kernel Object -# also called a Kernel Module/Driver or some rules present in iptables -module_map = { - 'ftp' : { - 'ko' : ['nf_nat_ftp', 'nf_conntrack_ftp'], - }, - 'h323' : { - 'ko' : ['nf_nat_h323', 'nf_conntrack_h323'], - }, - 'nfs' : { - 'nftables' : ['ct helper set "rpc_tcp" tcp dport "{111}" return', - 'ct helper set "rpc_udp" udp dport "{111}" return'] - }, - 'pptp' : { - 'ko' : ['nf_nat_pptp', 'nf_conntrack_pptp'], - }, - 'sip' : { - 'ko' : ['nf_nat_sip', 'nf_conntrack_sip'], - }, - 'sqlnet' : { - 'nftables' : ['ct helper set "tns_tcp" tcp dport "{1521,1525,1536}" return'] - }, - 'tftp' : { - 'ko' : ['nf_nat_tftp', 'nf_conntrack_tftp'], - }, -} - -def resync_conntrackd(): - tmp = run('/usr/libexec/vyos/conf_mode/conntrack_sync.py') - if tmp > 0: - print('ERROR: error restarting conntrackd!') - -def get_config(config=None): - if config: - conf = config - else: - conf = Config() - base = ['system', 'conntrack'] - - conntrack = conf.get_config_dict(base, key_mangling=('-', '_'), - get_first_key=True, - with_recursive_defaults=True) - - return conntrack - -def verify(conntrack): - if dict_search('ignore.rule', conntrack) != None: - for rule, rule_config in conntrack['ignore']['rule'].items(): - if dict_search('destination.port', rule_config) or \ - dict_search('source.port', rule_config): - if 'protocol' not in rule_config or rule_config['protocol'] not in ['tcp', 'udp']: - raise ConfigError(f'Port requires tcp or udp as protocol in rule {rule}') - - return None - -def generate(conntrack): - render(conntrack_config, 'conntrack/vyos_nf_conntrack.conf.j2', conntrack) - render(sysctl_file, 'conntrack/sysctl.conf.j2', conntrack) - render(nftables_ct_file, 'conntrack/nftables-ct.j2', conntrack) - - # dry-run newly generated configuration - tmp = run(f'nft -c -f {nftables_ct_file}') - if tmp > 0: - if os.path.exists(nftables_ct_file): - os.unlink(nftables_ct_file) - raise ConfigError('Configuration file errors encountered!') - - return None - -def find_nftables_ct_rule(rule): - helper_search = re.search('ct helper set "(\w+)"', rule) - if helper_search: - rule = helper_search[1] - return find_nftables_rule('raw', 'VYOS_CT_HELPER', [rule]) - -def find_remove_rule(rule): - handle = find_nftables_ct_rule(rule) - if handle: - remove_nftables_rule('raw', 'VYOS_CT_HELPER', handle) - -def apply(conntrack): - # Depending on the enable/disable state of the ALG (Application Layer Gateway) - # modules we need to either insmod or rmmod the helpers. - for module, module_config in module_map.items(): - if dict_search(f'modules.{module}', conntrack) is None: - if 'ko' in module_config: - for mod in module_config['ko']: - # Only remove the module if it's loaded - if os.path.exists(f'/sys/module/{mod}'): - cmd(f'rmmod {mod}') - if 'nftables' in module_config: - for rule in module_config['nftables']: - find_remove_rule(rule) - else: - if 'ko' in module_config: - for mod in module_config['ko']: - cmd(f'modprobe {mod}') - if 'nftables' in module_config: - for rule in module_config['nftables']: - if not find_nftables_ct_rule(rule): - cmd(f'nft insert rule ip raw VYOS_CT_HELPER {rule}') - - # Load new nftables ruleset - cmd(f'nft -f {nftables_ct_file}') - - if process_named_running('conntrackd'): - # Reload conntrack-sync daemon to fetch new sysctl values - resync_conntrackd() - - # We silently ignore all errors - # See: https://bugzilla.redhat.com/show_bug.cgi?id=1264080 - cmd(f'sysctl -f {sysctl_file}') - - return None - -if __name__ == '__main__': - try: - c = get_config() - verify(c) - generate(c) - apply(c) - except ConfigError as e: - print(e) - exit(1) |