diff options
| -rw-r--r-- | data/templates/firewall/nftables-vrf-zones.j2 | 17 | ||||
| -rw-r--r-- | data/vyos-firewall-init.conf | 19 | ||||
| -rwxr-xr-x | src/conf_mode/vrf.py | 47 |
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) |