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-rw-r--r--data/templates/firewall/nftables-vrf-zones.j217
-rw-r--r--data/vyos-firewall-init.conf19
-rwxr-xr-xsrc/conf_mode/vrf.py47
3 files changed, 40 insertions, 43 deletions
diff --git a/data/templates/firewall/nftables-vrf-zones.j2 b/data/templates/firewall/nftables-vrf-zones.j2
deleted file mode 100644
index 3bce7312d..000000000
--- a/data/templates/firewall/nftables-vrf-zones.j2
+++ /dev/null
@@ -1,17 +0,0 @@
-table inet vrf_zones {
- # Map of interfaces and connections tracking zones
- map ct_iface_map {
- typeof iifname : ct zone
- }
- # Assign unique zones for each VRF
- # Chain for inbound traffic
- chain vrf_zones_ct_in {
- type filter hook prerouting priority raw; policy accept;
- counter ct original zone set iifname map @ct_iface_map
- }
- # Chain for locally-generated traffic
- chain vrf_zones_ct_out {
- type filter hook output priority raw; policy accept;
- counter ct original zone set oifname map @ct_iface_map
- }
-}
diff --git a/data/vyos-firewall-init.conf b/data/vyos-firewall-init.conf
index cd7d5011f..5a4e03015 100644
--- a/data/vyos-firewall-init.conf
+++ b/data/vyos-firewall-init.conf
@@ -54,3 +54,22 @@ table ip6 raw {
type filter hook prerouting priority -300; policy accept;
}
}
+
+# Required by VRF
+table inet vrf_zones {
+ # Map of interfaces and connections tracking zones
+ map ct_iface_map {
+ typeof iifname : ct zone
+ }
+ # Assign unique zones for each VRF
+ # Chain for inbound traffic
+ chain vrf_zones_ct_in {
+ type filter hook prerouting priority raw; policy accept;
+ counter ct original zone set iifname map @ct_iface_map
+ }
+ # Chain for locally-generated traffic
+ chain vrf_zones_ct_out {
+ type filter hook output priority raw; policy accept;
+ counter ct original zone set oifname map @ct_iface_map
+ }
+}
diff --git a/src/conf_mode/vrf.py b/src/conf_mode/vrf.py
index 9b1b6355f..f2c544aa6 100755
--- a/src/conf_mode/vrf.py
+++ b/src/conf_mode/vrf.py
@@ -1,6 +1,6 @@
#!/usr/bin/env python3
#
-# Copyright (C) 2020-2023 VyOS maintainers and contributors
+# Copyright (C) 2020-2024 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
@@ -27,13 +27,12 @@ from vyos.ifconfig import Interface
from vyos.template import render
from vyos.template import render_to_string
from vyos.utils.dict import dict_search
+from vyos.utils.kernel import check_kmod
from vyos.utils.network import get_interface_config
from vyos.utils.network import get_vrf_members
from vyos.utils.network import interface_exists
from vyos.utils.process import call
from vyos.utils.process import cmd
-from vyos.utils.process import popen
-from vyos.utils.process import run
from vyos.utils.system import sysctl_write
from vyos import ConfigError
from vyos import frr
@@ -41,17 +40,29 @@ from vyos import airbag
airbag.enable()
config_file = '/etc/iproute2/rt_tables.d/vyos-vrf.conf'
-nft_vrf_config = '/tmp/nftables-vrf-zones'
-
-def has_rule(af : str, priority : int, table : str):
- """ Check if a given ip rule exists """
+k_mod = ['vrf']
+
+def has_rule(af : str, priority : int, table : str=None):
+ """
+ Check if a given ip rule exists
+ $ ip --json -4 rule show
+ [{'l3mdev': None, 'priority': 1000, 'src': 'all'},
+ {'action': 'unreachable', 'l3mdev': None, 'priority': 2000, 'src': 'all'},
+ {'priority': 32765, 'src': 'all', 'table': 'local'},
+ {'priority': 32766, 'src': 'all', 'table': 'main'},
+ {'priority': 32767, 'src': 'all', 'table': 'default'}]
+ """
if af not in ['-4', '-6']:
raise ValueError()
- command = f'ip -j {af} rule show'
+ command = f'ip --detail --json {af} rule show'
for tmp in loads(cmd(command)):
- if {'priority', 'table'} <= set(tmp):
+ if 'priority' in tmp and 'table' in tmp:
if tmp['priority'] == priority and tmp['table'] == table:
return True
+ elif 'priority' in tmp and table in tmp:
+ # l3mdev table has a different layout
+ if tmp['priority'] == priority:
+ return True
return False
def vrf_interfaces(c, match):
@@ -173,8 +184,6 @@ def verify(vrf):
def generate(vrf):
# Render iproute2 VR helper names
render(config_file, 'iproute2/vrf.conf.j2', vrf)
- # Render nftables zones config
- render(nft_vrf_config, 'firewall/nftables-vrf-zones.j2', vrf)
# Render VRF Kernel/Zebra route-map filters
vrf['frr_zebra_config'] = render_to_string('frr/zebra.vrf.route-map.frr.j2', vrf)
@@ -227,14 +236,6 @@ def apply(vrf):
sysctl_write('net.vrf.strict_mode', strict_mode)
if 'name' in vrf:
- # Separate VRFs in conntrack table
- # check if table already exists
- _, err = popen('nft list table inet vrf_zones')
- # If not, create a table
- if err and os.path.exists(nft_vrf_config):
- cmd(f'nft -f {nft_vrf_config}')
- os.unlink(nft_vrf_config)
-
# Linux routing uses rules to find tables - routing targets are then
# looked up in those tables. If the lookup got a matching route, the
# process ends.
@@ -318,17 +319,11 @@ def apply(vrf):
frr_cfg.add_before(frr.default_add_before, vrf['frr_zebra_config'])
frr_cfg.commit_configuration(zebra_daemon)
- # return to default lookup preference when no VRF is configured
- if 'name' not in vrf:
- # Remove VRF zones table from nftables
- tmp = run('nft list table inet vrf_zones')
- if tmp == 0:
- cmd('nft delete table inet vrf_zones')
-
return None
if __name__ == '__main__':
try:
+ check_kmod(k_mod)
c = get_config()
verify(c)
generate(c)