diff options
| -rw-r--r-- | data/configd-include.json | 2 | ||||
| -rw-r--r-- | data/templates/conntrack/sysctl.conf.tmpl | 26 | ||||
| -rw-r--r-- | data/templates/conntrack/vyos_nf_conntrack.conf.tmpl | 3 | ||||
| -rw-r--r-- | interface-definitions/system-conntrack.xml.in | 285 | ||||
| -rwxr-xr-x | src/conf_mode/conntrack.py | 83 |
5 files changed, 399 insertions, 0 deletions
diff --git a/data/configd-include.json b/data/configd-include.json index f241d0cb6..c3d59592a 100644 --- a/data/configd-include.json +++ b/data/configd-include.json @@ -1,5 +1,7 @@ [ "bcast_relay.py", +"conntrack.py", +"conntrack_sync.py", "dhcp_relay.py", "dhcpv6_relay.py", "dns_forwarding.py", diff --git a/data/templates/conntrack/sysctl.conf.tmpl b/data/templates/conntrack/sysctl.conf.tmpl new file mode 100644 index 000000000..9e97c3286 --- /dev/null +++ b/data/templates/conntrack/sysctl.conf.tmpl @@ -0,0 +1,26 @@ +# Autogenerated by conntrack.py +{# all values have defaults - thus no checking required #} + +net.netfilter.nf_conntrack_expect_max = {{ expect_table_size }} +net.netfilter.nf_conntrack_max = {{ table_size }} + +net.ipv4.tcp_max_syn_backlog = {{ tcp.half_open_connections }} + +net.netfilter.nf_conntrack_tcp_loose = {{ '1' if tcp.loose == 'enable' else '0' }} +net.netfilter.nf_conntrack_tcp_max_retrans = {{ tcp.max_retrans }} + +net.netfilter.nf_conntrack_icmp_timeout = {{ timeout.icmp }} +net.netfilter.nf_conntrack_generic_timeout = {{ timeout.other }} + +net.netfilter.nf_conntrack_tcp_timeout_close_wait = {{ timeout.tcp.close_wait }} +net.netfilter.nf_conntrack_tcp_timeout_close = {{ timeout.tcp.close }} +net.netfilter.nf_conntrack_tcp_timeout_established = {{ timeout.tcp.established }} +net.netfilter.nf_conntrack_tcp_timeout_fin_wait = {{ timeout.tcp.fin_wait }} +net.netfilter.nf_conntrack_tcp_timeout_last_ack = {{ timeout.tcp.last_ack }} +net.netfilter.nf_conntrack_tcp_timeout_syn_recv = {{ timeout.tcp.syn_recv }} +net.netfilter.nf_conntrack_tcp_timeout_syn_sent = {{ timeout.tcp.syn_sent }} +net.netfilter.nf_conntrack_tcp_timeout_time_wait = {{ timeout.tcp.time_wait }} + +net.netfilter.nf_conntrack_udp_timeout = {{ timeout.udp.other }} +net.netfilter.nf_conntrack_udp_timeout_stream = {{ timeout.udp.stream }} + diff --git a/data/templates/conntrack/vyos_nf_conntrack.conf.tmpl b/data/templates/conntrack/vyos_nf_conntrack.conf.tmpl new file mode 100644 index 000000000..111459485 --- /dev/null +++ b/data/templates/conntrack/vyos_nf_conntrack.conf.tmpl @@ -0,0 +1,3 @@ +# Autogenerated by conntrack.py +options nf_conntrack hashsize={{ hash_size }} nf_conntrack_helper=1 + diff --git a/interface-definitions/system-conntrack.xml.in b/interface-definitions/system-conntrack.xml.in new file mode 100644 index 000000000..07a2c401d --- /dev/null +++ b/interface-definitions/system-conntrack.xml.in @@ -0,0 +1,285 @@ +<?xml version="1.0"?> +<interfaceDefinition> + <node name="system"> + <children> + <node name="conntrack" owner="${vyos_conf_scripts_dir}/conntrack.py"> + <properties> + <help>Connection Tracking Engine Options</help> + <!-- Before NAT and conntrack-sync are configured --> + <priority>218</priority> + </properties> + <children> + <leafNode name="expect-table-size"> + <properties> + <help>Size of connection tracking expect table</help> + <valueHelp> + <format>u32:1-50000000</format> + <description>Number of entries allowed in connection tracking expect table</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-50000000"/> + </constraint> + </properties> + <defaultValue>2048</defaultValue> + </leafNode> + <leafNode name="hash-size"> + <properties> + <help>Hash size for connection tracking table</help> + <valueHelp> + <format>u32:1-50000000</format> + <description>Size of hash to use for connection tracking table</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-50000000"/> + </constraint> + </properties> + <defaultValue>32768</defaultValue> + </leafNode> + <leafNode name="table-size"> + <properties> + <help>Size of connection tracking table</help> + <valueHelp> + <format>u32:1-50000000</format> + <description>Number of entries allowed in connection tracking table</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-50000000"/> + </constraint> + </properties> + <defaultValue>262144</defaultValue> + </leafNode> + <node name="tcp"> + <properties> + <help>TCP options</help> + </properties> + <children> + <leafNode name="half-open-connections"> + <properties> + <help>Maximum number of TCP half-open connections</help> + <valueHelp> + <format>u32:1-2147483647</format> + <description>Generic connection timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-2147483647"/> + </constraint> + </properties> + <defaultValue>512</defaultValue> + </leafNode> + <leafNode name="loose"> + <properties> + <help>Policy to track previously established connections</help> + <completionHelp> + <list>enable disable</list> + </completionHelp> + <valueHelp> + <format>enable</format> + <description>Allow tracking of previously established connections</description> + </valueHelp> + <valueHelp> + <format>disable</format> + <description>Do not allow tracking of previously established connections</description> + </valueHelp> + <constraint> + <regex>^(enable|disable)$</regex> + </constraint> + </properties> + <defaultValue>enable</defaultValue> + </leafNode> + <leafNode name="max-retrans"> + <properties> + <help>TCP maximum retransmit attempts</help> + <valueHelp> + <format>u32:1-2147483647</format> + <description>Generic connection timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-2147483647"/> + </constraint> + </properties> + <defaultValue>3</defaultValue> + </leafNode> + </children> + </node> + <node name="timeout"> + <properties> + <help>Connection timeout options</help> + </properties> + <children> + <leafNode name="icmp"> + <properties> + <help>ICMP timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>ICMP timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>30</defaultValue> + </leafNode> + <leafNode name="other"> + <properties> + <help>Generic connection timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>Generic connection timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>600</defaultValue> + </leafNode> + <node name="tcp"> + <properties> + <help>TCP connection timeout options</help> + </properties> + <children> + <leafNode name="close-wait"> + <properties> + <help>TCP CLOSE-WAIT timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP CLOSE-WAIT timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>60</defaultValue> + </leafNode> + <leafNode name="close"> + <properties> + <help>TCP CLOSE timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP CLOSE timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>10</defaultValue> + </leafNode> + <leafNode name="established"> + <properties> + <help>TCP ESTABLISHED timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP ESTABLISHED timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>432000</defaultValue> + </leafNode> + <leafNode name="fin-wait"> + <properties> + <help>TCP FIN-WAIT timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP FIN-WAIT timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>120</defaultValue> + </leafNode> + <leafNode name="last-ack"> + <properties> + <help>TCP LAST-ACK timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP LAST-ACK timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>30</defaultValue> + </leafNode> + <leafNode name="syn-recv"> + <properties> + <help>TCP SYN-RECEIVED timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP SYN-RECEIVED timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>60</defaultValue> + </leafNode> + <leafNode name="syn-sent"> + <properties> + <help>TCP SYN-SENT timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP SYN-SENT timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>120</defaultValue> + </leafNode> + <leafNode name="time-wait"> + <properties> + <help>TCP TIME-WAIT timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>TCP TIME-WAIT timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>120</defaultValue> + </leafNode> + </children> + </node> + <node name="udp"> + <properties> + <help>UDP timeout options</help> + </properties> + <children> + <leafNode name="other"> + <properties> + <help>UDP generic timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>UDP generic timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>30</defaultValue> + </leafNode> + <leafNode name="stream"> + <properties> + <help>UDP stream timeout in seconds</help> + <valueHelp> + <format>u32:1-21474836</format> + <description>UDP stream timeout in seconds</description> + </valueHelp> + <constraint> + <validator name="numeric" argument="--range 1-21474836"/> + </constraint> + </properties> + <defaultValue>180</defaultValue> + </leafNode> + </children> + </node> + </children> + </node> + </children> + </node> + </children> + </node> +</interfaceDefinition> diff --git a/src/conf_mode/conntrack.py b/src/conf_mode/conntrack.py new file mode 100755 index 000000000..e834231cf --- /dev/null +++ b/src/conf_mode/conntrack.py @@ -0,0 +1,83 @@ +#!/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 <http://www.gnu.org/licenses/>. + +from sys import exit + +from vyos.config import Config +from vyos.configdict import dict_merge +from vyos.util import cmd +from vyos.util import run +from vyos.util import process_named_running +from vyos.template import render +from vyos.xml import defaults +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' + +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) + + # We have gathered the dict representation of the CLI, but there are default + # options which we need to update into the dictionary retrived. + default_values = defaults(base) + conntrack = dict_merge(default_values, conntrack) + + return conntrack + +def verify(conntrack): + return None + +def generate(conntrack): + render(conntrack_config, 'conntrack/vyos_nf_conntrack.conf.tmpl', conntrack) + render(sysctl_file, 'conntrack/sysctl.conf.tmpl', conntrack) + + return None + +def apply(conntrack): + 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) |