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# Copyright 2023-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library. If not, see <http://www.gnu.org/licenses/>.
# T5160: Firewall re-writing
# cli changes from:
# set firewall name <name> ...
# set firewall ipv6-name <name> ...
# To
# set firewall ipv4 name <name>
# set firewall ipv6 name <name>
## Also from 'firewall interface' removed.
## in and out:
# set firewall interface <iface> [in|out] [name | ipv6-name] <name>
# To
# set firewall [ipv4 | ipv6] forward filter rule <5,10,15,...> [inbound-interface | outboubd-interface] interface-name <iface>
# set firewall [ipv4 | ipv6] forward filter rule <5,10,15,...> action jump
# set firewall [ipv4 | ipv6] forward filter rule <5,10,15,...> jump-target <name>
## local:
# set firewall interface <iface> local [name | ipv6-name] <name>
# To
# set firewall [ipv4 | ipv6] input filter rule <5,10,15,...> inbound-interface interface-name <iface>
# set firewall [ipv4 | ipv6] input filter rule <5,10,15,...> action jump
# set firewall [ipv4 | ipv6] input filter rule <5,10,15,...> jump-target <name>
from vyos.configtree import ConfigTree
base = ['firewall']
def migrate(config: ConfigTree) -> None:
if not config.exists(base):
# Nothing to do
return
### Migration of state policies
if config.exists(base + ['state-policy']):
for state in config.list_nodes(base + ['state-policy']):
action = config.return_value(base + ['state-policy', state, 'action'])
config.set(base + ['global-options', 'state-policy', state, 'action'], value=action)
if config.exists(base + ['state-policy', state, 'log']):
config.set(base + ['global-options', 'state-policy', state, 'log'], value='enable')
config.delete(base + ['state-policy'])
## migration of global options:
for option in ['all-ping', 'broadcast-ping', 'config-trap', 'ip-src-route', 'ipv6-receive-redirects', 'ipv6-src-route', 'log-martians',
'receive-redirects', 'resolver-cache', 'resolver-internal', 'send-redirects', 'source-validation', 'syn-cookies', 'twa-hazards-protection']:
if config.exists(base + [option]):
if option != 'config-trap':
val = config.return_value(base + [option])
config.set(base + ['global-options', option], value=val)
config.delete(base + [option])
### Migration of firewall name and ipv6-name
### Also migrate legacy 'accept' behaviour
if config.exists(base + ['name']):
config.set(['firewall', 'ipv4', 'name'])
config.set_tag(['firewall', 'ipv4', 'name'])
for ipv4name in config.list_nodes(base + ['name']):
config.copy(base + ['name', ipv4name], base + ['ipv4', 'name', ipv4name])
if config.exists(base + ['ipv4', 'name', ipv4name, 'default-action']):
action = config.return_value(base + ['ipv4', 'name', ipv4name, 'default-action'])
if action == 'accept':
config.set(base + ['ipv4', 'name', ipv4name, 'default-action'], value='return')
if config.exists(base + ['ipv4', 'name', ipv4name, 'rule']):
for rule_id in config.list_nodes(base + ['ipv4', 'name', ipv4name, 'rule']):
action = config.return_value(base + ['ipv4', 'name', ipv4name, 'rule', rule_id, 'action'])
if action == 'accept':
config.set(base + ['ipv4', 'name', ipv4name, 'rule', rule_id, 'action'], value='return')
config.delete(base + ['name'])
if config.exists(base + ['ipv6-name']):
config.set(['firewall', 'ipv6', 'name'])
config.set_tag(['firewall', 'ipv6', 'name'])
for ipv6name in config.list_nodes(base + ['ipv6-name']):
config.copy(base + ['ipv6-name', ipv6name], base + ['ipv6', 'name', ipv6name])
if config.exists(base + ['ipv6', 'name', ipv6name, 'default-action']):
action = config.return_value(base + ['ipv6', 'name', ipv6name, 'default-action'])
if action == 'accept':
config.set(base + ['ipv6', 'name', ipv6name, 'default-action'], value='return')
if config.exists(base + ['ipv6', 'name', ipv6name, 'rule']):
for rule_id in config.list_nodes(base + ['ipv6', 'name', ipv6name, 'rule']):
action = config.return_value(base + ['ipv6', 'name', ipv6name, 'rule', rule_id, 'action'])
if action == 'accept':
config.set(base + ['ipv6', 'name', ipv6name, 'rule', rule_id, 'action'], value='return')
config.delete(base + ['ipv6-name'])
### Migration of firewall interface
if config.exists(base + ['interface']):
fwd_ipv4_rule = 5
inp_ipv4_rule = 5
fwd_ipv6_rule = 5
inp_ipv6_rule = 5
for direction in ['in', 'out', 'local']:
for iface in config.list_nodes(base + ['interface']):
if config.exists(base + ['interface', iface, direction]):
if config.exists(base + ['interface', iface, direction, 'name']):
target = config.return_value(base + ['interface', iface, direction, 'name'])
if direction == 'in':
# Add default-action== accept for compatibility reasons:
config.set(base + ['ipv4', 'forward', 'filter', 'default-action'], value='accept')
new_base = base + ['ipv4', 'forward', 'filter', 'rule']
config.set(new_base)
config.set_tag(new_base)
config.set(new_base + [fwd_ipv4_rule, 'inbound-interface', 'interface-name'], value=iface)
config.set(new_base + [fwd_ipv4_rule, 'action'], value='jump')
config.set(new_base + [fwd_ipv4_rule, 'jump-target'], value=target)
fwd_ipv4_rule = fwd_ipv4_rule + 5
elif direction == 'out':
# Add default-action== accept for compatibility reasons:
config.set(base + ['ipv4', 'forward', 'filter', 'default-action'], value='accept')
new_base = base + ['ipv4', 'forward', 'filter', 'rule']
config.set(new_base)
config.set_tag(new_base)
config.set(new_base + [fwd_ipv4_rule, 'outbound-interface', 'interface-name'], value=iface)
config.set(new_base + [fwd_ipv4_rule, 'action'], value='jump')
config.set(new_base + [fwd_ipv4_rule, 'jump-target'], value=target)
fwd_ipv4_rule = fwd_ipv4_rule + 5
else:
# Add default-action== accept for compatibility reasons:
config.set(base + ['ipv4', 'input', 'filter', 'default-action'], value='accept')
new_base = base + ['ipv4', 'input', 'filter', 'rule']
config.set(new_base)
config.set_tag(new_base)
config.set(new_base + [inp_ipv4_rule, 'inbound-interface', 'interface-name'], value=iface)
config.set(new_base + [inp_ipv4_rule, 'action'], value='jump')
config.set(new_base + [inp_ipv4_rule, 'jump-target'], value=target)
inp_ipv4_rule = inp_ipv4_rule + 5
if config.exists(base + ['interface', iface, direction, 'ipv6-name']):
target = config.return_value(base + ['interface', iface, direction, 'ipv6-name'])
if direction == 'in':
# Add default-action== accept for compatibility reasons:
config.set(base + ['ipv6', 'forward', 'filter', 'default-action'], value='accept')
new_base = base + ['ipv6', 'forward', 'filter', 'rule']
config.set(new_base)
config.set_tag(new_base)
config.set(new_base + [fwd_ipv6_rule, 'inbound-interface', 'interface-name'], value=iface)
config.set(new_base + [fwd_ipv6_rule, 'action'], value='jump')
config.set(new_base + [fwd_ipv6_rule, 'jump-target'], value=target)
fwd_ipv6_rule = fwd_ipv6_rule + 5
elif direction == 'out':
# Add default-action== accept for compatibility reasons:
config.set(base + ['ipv6', 'forward', 'filter', 'default-action'], value='accept')
new_base = base + ['ipv6', 'forward', 'filter', 'rule']
config.set(new_base)
config.set_tag(new_base)
config.set(new_base + [fwd_ipv6_rule, 'outbound-interface', 'interface-name'], value=iface)
config.set(new_base + [fwd_ipv6_rule, 'action'], value='jump')
config.set(new_base + [fwd_ipv6_rule, 'jump-target'], value=target)
fwd_ipv6_rule = fwd_ipv6_rule + 5
else:
new_base = base + ['ipv6', 'input', 'filter', 'rule']
# Add default-action== accept for compatibility reasons:
config.set(base + ['ipv6', 'input', 'filter', 'default-action'], value='accept')
config.set(new_base)
config.set_tag(new_base)
config.set(new_base + [inp_ipv6_rule, 'inbound-interface', 'interface-name'], value=iface)
config.set(new_base + [inp_ipv6_rule, 'action'], value='jump')
config.set(new_base + [inp_ipv6_rule, 'jump-target'], value=target)
inp_ipv6_rule = inp_ipv6_rule + 5
config.delete(base + ['interface'])
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