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authorsarthurdev <965089+sarthurdev@users.noreply.github.com>2022-09-21 02:05:30 +0200
committersarthurdev <965089+sarthurdev@users.noreply.github.com>2022-09-21 20:53:49 +0200
commitc6bbe051574acf5ca1501e631d73ac06bdb17b30 (patch)
tree3a10a0d4d58a2edb8b50e65d45f61b7574dd82af /data
parente6ba98a85ca72abc7e7e2001d208bcd1806c2c13 (diff)
downloadvyos-1x-c6bbe051574acf5ca1501e631d73ac06bdb17b30.tar.gz
vyos-1x-c6bbe051574acf5ca1501e631d73ac06bdb17b30.zip
nat: T4605: Refactor static NAT to use python module for parsing rules
* Rename table to vyos_nat * Add static NAT smoketest
Diffstat (limited to 'data')
-rw-r--r--data/templates/firewall/nftables-static-nat.j2122
-rw-r--r--data/vyos-firewall-init.conf20
2 files changed, 19 insertions, 123 deletions
diff --git a/data/templates/firewall/nftables-static-nat.j2 b/data/templates/firewall/nftables-static-nat.j2
index d3c43858f..790c33ce9 100644
--- a/data/templates/firewall/nftables-static-nat.j2
+++ b/data/templates/firewall/nftables-static-nat.j2
@@ -1,115 +1,31 @@
#!/usr/sbin/nft -f
-{% macro nat_rule(rule, config, chain) %}
-{% set comment = '' %}
-{% set base_log = '' %}
-
-{% if chain is vyos_defined('PREROUTING') %}
-{% set comment = 'STATIC-NAT-' ~ rule %}
-{% set base_log = '[NAT-DST-' ~ rule %}
-{% set interface = ' iifname "' ~ config.inbound_interface ~ '"' if config.inbound_interface is vyos_defined and config.inbound_interface is not vyos_defined('any') else '' %}
-{% if config.translation.address is vyos_defined %}
-{# support 1:1 network translation #}
-{% if config.translation.address | is_ip_network %}
-{% set trns_addr = 'dnat ip prefix to ip daddr map { ' ~ config.destination.address ~ ' : ' ~ config.translation.address ~ ' }' %}
-{# we can now clear out the dst_addr part as it's already covered in aboves map #}
-{% else %}
-{% set dst_addr = 'ip daddr ' ~ config.destination.address if config.destination.address is vyos_defined %}
-{% set trns_addr = 'dnat to ' ~ config.translation.address %}
-{% endif %}
-{% endif %}
-{% elif chain is vyos_defined('POSTROUTING') %}
-{% set comment = 'STATIC-NAT-' ~ rule %}
-{% set base_log = '[NAT-SRC-' ~ rule %}
-{% set interface = ' oifname "' ~ config.inbound_interface ~ '"' if config.inbound_interface is vyos_defined and config.inbound_interface is not vyos_defined('any') else '' %}
-{% if config.translation.address is vyos_defined %}
-{# support 1:1 network translation #}
-{% if config.translation.address | is_ip_network %}
-{% set trns_addr = 'snat ip prefix to ip saddr map { ' ~ config.translation.address ~ ' : ' ~ config.destination.address ~ ' }' %}
-{# we can now clear out the src_addr part as it's already covered in aboves map #}
-{% else %}
-{% set src_addr = 'ip saddr ' ~ config.translation.address if config.translation.address is vyos_defined %}
-{% set trns_addr = 'snat to ' ~ config.destination.address %}
-{% endif %}
-{% endif %}
-{% endif %}
-
-{% if config.exclude is vyos_defined %}
-{# rule has been marked as 'exclude' thus we simply return here #}
-{% set trns_addr = 'return' %}
-{% set trns_port = '' %}
-{% endif %}
-
-{% if config.translation.options is vyos_defined %}
-{% if config.translation.options.address_mapping is vyos_defined('persistent') %}
-{% set trns_opts_addr = 'persistent' %}
-{% endif %}
-{% if config.translation.options.port_mapping is vyos_defined('random') %}
-{% set trns_opts_port = 'random' %}
-{% elif config.translation.options.port_mapping is vyos_defined('fully-random') %}
-{% set trns_opts_port = 'fully-random' %}
-{% endif %}
-{% endif %}
-
-{% if trns_opts_addr is vyos_defined and trns_opts_port is vyos_defined %}
-{% set trns_opts = trns_opts_addr ~ ',' ~ trns_opts_port %}
-{% elif trns_opts_addr is vyos_defined %}
-{% set trns_opts = trns_opts_addr %}
-{% elif trns_opts_port is vyos_defined %}
-{% set trns_opts = trns_opts_port %}
-{% endif %}
-
-{% set output = 'add rule ip vyos_static_nat ' ~ chain ~ interface %}
-
-{% if dst_addr is vyos_defined %}
-{% set output = output ~ ' ' ~ dst_addr %}
+{% if first_install is not vyos_defined %}
+delete table ip vyos_static_nat
{% endif %}
-{% if src_addr is vyos_defined %}
-{% set output = output ~ ' ' ~ src_addr %}
-{% endif %}
-
-{# Count packets #}
-{% set output = output ~ ' counter' %}
-{# Special handling of log option, we must repeat the entire rule before the #}
-{# NAT translation options are added, this is essential #}
-{% if log is vyos_defined %}
-{% set log_output = output ~ ' log prefix "' ~ log ~ '" comment "' ~ comment ~ '"' %}
-{% endif %}
-{% if trns_addr is vyos_defined %}
-{% set output = output ~ ' ' ~ trns_addr %}
-{% endif %}
-
-{% if trns_opts is vyos_defined %}
-{% set output = output ~ ' ' ~ trns_opts %}
-{% endif %}
-{% if comment is vyos_defined %}
-{% set output = output ~ ' comment "' ~ comment ~ '"' %}
-{% endif %}
-{{ log_output if log_output is vyos_defined }}
-{{ output }}
-{% endmacro %}
-
-# Start with clean STATIC NAT chains
-flush chain ip vyos_static_nat PREROUTING
-flush chain ip vyos_static_nat POSTROUTING
+table ip vyos_static_nat {
+ #
+ # Destination NAT rules build up here
+ #
-{# NAT if enabled - add targets to nftables #}
-
-#
-# Destination NAT rules build up here
-#
-add rule ip vyos_static_nat PREROUTING counter jump VYOS_PRE_DNAT_HOOK
+ chain PREROUTING {
+ type nat hook prerouting priority -100; policy accept;
{% if static.rule is vyos_defined %}
{% for rule, config in static.rule.items() if config.disable is not vyos_defined %}
-{{ nat_rule(rule, config, 'PREROUTING') }}
+ {{ config | nat_static_rule(rule, 'destination') }}
{% endfor %}
{% endif %}
-#
-# Source NAT rules build up here
-#
-add rule ip vyos_static_nat POSTROUTING counter jump VYOS_PRE_SNAT_HOOK
+ }
+
+ #
+ # Source NAT rules build up here
+ #
+ chain POSTROUTING {
+ type nat hook postrouting priority 100; policy accept;
{% if static.rule is vyos_defined %}
{% for rule, config in static.rule.items() if config.disable is not vyos_defined %}
-{{ nat_rule(rule, config, 'POSTROUTING') }}
+ {{ config | nat_static_rule(rule, 'source') }}
{% endfor %}
{% endif %}
+ }
+}
diff --git a/data/vyos-firewall-init.conf b/data/vyos-firewall-init.conf
index 3a0e1ee48..11a5bc7bf 100644
--- a/data/vyos-firewall-init.conf
+++ b/data/vyos-firewall-init.conf
@@ -1,25 +1,5 @@
#!/usr/sbin/nft -f
-table ip vyos_static_nat {
- chain PREROUTING {
- type nat hook prerouting priority -100; policy accept;
- counter jump VYOS_PRE_DNAT_HOOK
- }
-
- chain POSTROUTING {
- type nat hook postrouting priority 100; policy accept;
- counter jump VYOS_PRE_SNAT_HOOK
- }
-
- chain VYOS_PRE_DNAT_HOOK {
- return
- }
-
- chain VYOS_PRE_SNAT_HOOK {
- return
- }
-}
-
# Required by wanloadbalance
table ip nat {
chain VYOS_PRE_SNAT_HOOK {