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authorChristian Breunig <christian@breunig.cc>2023-12-30 23:25:20 +0100
committerChristian Breunig <christian@breunig.cc>2024-01-01 09:25:32 +0100
commitc9eaafd9f808aba8d29be73054e11d37577e539a (patch)
treeaeccfda0a305cf6aca41630900e75bd32961a911 /src/conf_mode/conntrack.py
parent2078253176046ea4d07e69caeb7932ea439b5614 (diff)
downloadvyos-1x-c9eaafd9f808aba8d29be73054e11d37577e539a.tar.gz
vyos-1x-c9eaafd9f808aba8d29be73054e11d37577e539a.zip
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 (cherry picked from commit 4ef110fd2c501b718344c72d495ad7e16d2bd465)
Diffstat (limited to 'src/conf_mode/conntrack.py')
-rwxr-xr-xsrc/conf_mode/conntrack.py161
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)