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authorNicolas Fort <nicolasfort1988@gmail.com>2022-10-28 18:19:47 +0000
committerNicolas Fort <nicolasfort1988@gmail.com>2022-11-19 14:31:32 +0000
commit9a5dfb4b7ec9e065a73511a38e1713aec03eee0e (patch)
tree6c27d3413c22f14af358fd28994a243b9fcf5633 /src/conf_mode/policy-route.py
parenta61e1a78fe116bb44fe55be3493de7c4dbe8db97 (diff)
downloadvyos-1x-9a5dfb4b7ec9e065a73511a38e1713aec03eee0e.tar.gz
vyos-1x-9a5dfb4b7ec9e065a73511a38e1713aec03eee0e.zip
T4780: Firewall: add firewall groups in firewall. Extend matching criteria so this new group can be used in inbound and outbound matcher
Diffstat (limited to 'src/conf_mode/policy-route.py')
-rwxr-xr-xsrc/conf_mode/policy-route.py109
1 files changed, 5 insertions, 104 deletions
diff --git a/src/conf_mode/policy-route.py b/src/conf_mode/policy-route.py
index 00539b9c7..40a32efb3 100755
--- a/src/conf_mode/policy-route.py
+++ b/src/conf_mode/policy-route.py
@@ -15,7 +15,6 @@
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
-import re
from json import loads
from sys import exit
@@ -25,7 +24,6 @@ from vyos.config import Config
from vyos.template import render
from vyos.util import cmd
from vyos.util import dict_search_args
-from vyos.util import dict_search_recursive
from vyos.util import run
from vyos import ConfigError
from vyos import airbag
@@ -34,48 +32,14 @@ airbag.enable()
mark_offset = 0x7FFFFFFF
nftables_conf = '/run/nftables_policy.conf'
-ROUTE_PREFIX = 'VYOS_PBR_'
-ROUTE6_PREFIX = 'VYOS_PBR6_'
-
-preserve_chains = [
- 'VYOS_PBR_PREROUTING',
- 'VYOS_PBR_POSTROUTING',
- 'VYOS_PBR6_PREROUTING',
- 'VYOS_PBR6_POSTROUTING'
-]
-
valid_groups = [
'address_group',
+ 'domain_group',
'network_group',
- 'port_group'
+ 'port_group',
+ 'interface_group'
]
-group_set_prefix = {
- 'A_': 'address_group',
- 'A6_': 'ipv6_address_group',
-# 'D_': 'domain_group',
- 'M_': 'mac_group',
- 'N_': 'network_group',
- 'N6_': 'ipv6_network_group',
- 'P_': 'port_group'
-}
-
-def get_policy_interfaces(conf):
- out = {}
- interfaces = conf.get_config_dict(['interfaces'], key_mangling=('-', '_'), get_first_key=True,
- no_tag_node_value_mangle=True)
- def find_interfaces(iftype_conf, output={}, prefix=''):
- for ifname, if_conf in iftype_conf.items():
- if 'policy' in if_conf:
- output[prefix + ifname] = if_conf['policy']
- for vif in ['vif', 'vif_s', 'vif_c']:
- if vif in if_conf:
- output.update(find_interfaces(if_conf[vif], output, f'{prefix}{ifname}.'))
- return output
- for iftype, iftype_conf in interfaces.items():
- out.update(find_interfaces(iftype_conf))
- return out
-
def get_config(config=None):
if config:
conf = config
@@ -88,7 +52,6 @@ def get_config(config=None):
policy['firewall_group'] = conf.get_config_dict(['firewall', 'group'], key_mangling=('-', '_'), get_first_key=True,
no_tag_node_value_mangle=True)
- policy['interfaces'] = get_policy_interfaces(conf)
return policy
@@ -132,8 +95,8 @@ def verify_rule(policy, name, rule_conf, ipv6, rule_id):
side_conf = rule_conf[side]
if 'group' in side_conf:
- if {'address_group', 'network_group'} <= set(side_conf['group']):
- raise ConfigError('Only one address-group or network-group can be specified')
+ if len({'address_group', 'domain_group', 'network_group'} & set(side_conf['group'])) > 1:
+ raise ConfigError('Only one address-group, domain-group or network-group can be specified')
for group in valid_groups:
if group in side_conf['group']:
@@ -168,73 +131,11 @@ def verify(policy):
for rule_id, rule_conf in pol_conf['rule'].items():
verify_rule(policy, name, rule_conf, ipv6, rule_id)
- for ifname, if_policy in policy['interfaces'].items():
- name = dict_search_args(if_policy, 'route')
- ipv6_name = dict_search_args(if_policy, 'route6')
-
- if name and not dict_search_args(policy, 'route', name):
- raise ConfigError(f'Policy route "{name}" is still referenced on interface {ifname}')
-
- if ipv6_name and not dict_search_args(policy, 'route6', ipv6_name):
- raise ConfigError(f'Policy route6 "{ipv6_name}" is still referenced on interface {ifname}')
-
return None
-def cleanup_commands(policy):
- commands = []
- commands_chains = []
- commands_sets = []
- for table in ['ip mangle', 'ip6 mangle']:
- route_node = 'route' if table == 'ip mangle' else 'route6'
- chain_prefix = ROUTE_PREFIX if table == 'ip mangle' else ROUTE6_PREFIX
-
- json_str = cmd(f'nft -t -j list table {table}')
- obj = loads(json_str)
- if 'nftables' not in obj:
- continue
- for item in obj['nftables']:
- if 'chain' in item:
- chain = item['chain']['name']
- if chain in preserve_chains or not chain.startswith("VYOS_PBR"):
- continue
-
- if dict_search_args(policy, route_node, chain.replace(chain_prefix, "", 1)) != None:
- commands.append(f'flush chain {table} {chain}')
- else:
- commands_chains.append(f'delete chain {table} {chain}')
-
- if 'rule' in item:
- rule = item['rule']
- chain = rule['chain']
- handle = rule['handle']
-
- if chain not in preserve_chains:
- continue
-
- target, _ = next(dict_search_recursive(rule['expr'], 'target'))
-
- if target.startswith(chain_prefix):
- if dict_search_args(policy, route_node, target.replace(chain_prefix, "", 1)) == None:
- commands.append(f'delete rule {table} {chain} handle {handle}')
-
- if 'set' in item:
- set_name = item['set']['name']
-
- for prefix, group_type in group_set_prefix.items():
- if set_name.startswith(prefix):
- group_name = set_name.replace(prefix, "", 1)
- if dict_search_args(policy, 'firewall_group', group_type, group_name) != None:
- commands_sets.append(f'flush set {table} {set_name}')
- else:
- commands_sets.append(f'delete set {table} {set_name}')
-
- return commands + commands_chains + commands_sets
-
def generate(policy):
if not os.path.exists(nftables_conf):
policy['first_install'] = True
- else:
- policy['cleanup_commands'] = cleanup_commands(policy)
render(nftables_conf, 'firewall/nftables-policy.j2', policy)
return None