From 9eab0cdd0bbea0f899af5a7d68cc63523a12a703 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Sun, 1 May 2022 20:08:28 +0200
Subject: firewall: T4353: fix Jinja2 linting errors

---
 data/templates/firewall/nftables-nat66.j2 | 102 ++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 data/templates/firewall/nftables-nat66.j2

(limited to 'data/templates/firewall/nftables-nat66.j2')

diff --git a/data/templates/firewall/nftables-nat66.j2 b/data/templates/firewall/nftables-nat66.j2
new file mode 100644
index 000000000..003b138b2
--- /dev/null
+++ b/data/templates/firewall/nftables-nat66.j2
@@ -0,0 +1,102 @@
+#!/usr/sbin/nft -f
+
+{% macro nptv6_rule(rule,config, chain) %}
+{% set comment  = '' %}
+{% set base_log = '' %}
+{% set src_prefix  = 'ip6 saddr ' ~ config.source.prefix if config.source.prefix is vyos_defined %}
+{% set dest_address  = 'ip6 daddr ' ~ config.destination.address if config.destination.address is vyos_defined %}
+{% if chain is vyos_defined('PREROUTING') %}
+{%     set comment   = 'DST-NAT66-' ~ rule %}
+{%     set base_log  = '[NAT66-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_ip_network %}
+{#         support 1:1 network translation #}
+{%         set dnat_type = 'dnat prefix to ' %}
+{%     else   %}
+{%         set dnat_type = 'dnat to ' %}
+{%     endif %}
+{%     set trns_address = dnat_type ~ config.translation.address if config.translation.address is vyos_defined %}
+{% elif chain is vyos_defined('POSTROUTING') %}
+{%     set comment   = 'SRC-NAT66-' ~ rule %}
+{%     set base_log  = '[NAT66-SRC-' ~ rule %}
+{%     if config.translation.address is vyos_defined %}
+{%         if config.translation.address is vyos_defined('masquerade') %}
+{%             set trns_address = config.translation.address %}
+{%         else %}
+{%             if config.translation.address | is_ip_network %}
+{#                 support 1:1 network translation #}
+{%                 set snat_type = 'snat prefix to ' %}
+{%             else   %}
+{%                 set snat_type = 'snat to ' %}
+{%             endif %}
+{%             set trns_address = snat_type ~ config.translation.address %}
+{%         endif %}
+{%     endif   %}
+{%     set interface = ' oifname "' ~ config.outbound_interface ~ '"' if config.outbound_interface is vyos_defined else '' %}
+{% endif %}
+{% if config.log is vyos_defined %}
+{%     if config.translation.address is vyos_defined('masquerade') %}
+{%         set log = base_log ~ '-MASQ]' %}
+{%     else %}
+{%         set log = base_log ~ ']' %}
+{%     endif %}
+{% endif %}
+{% set output = 'add rule ip6 nat ' ~ chain ~ interface %}
+{# 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 src_prefix is vyos_defined %}
+{%     set output = output ~ ' ' ~ src_prefix %}
+{% endif %}
+{% if dest_address is vyos_defined %}
+{%     set output = output ~ ' ' ~ dest_address %}
+{% endif %}
+{% if trns_address is vyos_defined %}
+{%     set output = output ~ ' ' ~ trns_address %}
+{% 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 NAT table
+flush table ip6 nat
+{% if helper_functions is vyos_defined('remove') %}
+{# NAT if going to be disabled - remove rules and targets from nftables #}
+{%     set base_command = 'delete rule ip6 raw' %}
+{{ base_command }} PREROUTING handle {{ pre_ct_conntrack }}
+{{ base_command }} OUTPUT handle {{ out_ct_conntrack }}
+
+delete chain ip6 raw NAT_CONNTRACK
+
+{% elif helper_functions is vyos_defined('add') %}
+{# NAT if enabled - add targets to nftables #}
+add chain ip6 raw NAT_CONNTRACK
+add rule ip6 raw NAT_CONNTRACK counter accept
+{%     set base_command = 'add rule ip6 raw' %}
+{{ base_command }} PREROUTING position {{ pre_ct_conntrack }} counter jump NAT_CONNTRACK
+{{ base_command }} OUTPUT     position {{ out_ct_conntrack }} counter jump NAT_CONNTRACK
+{% endif %}
+
+#
+# Destination NAT66 rules build up here
+#
+{% if destination.rule is vyos_defined %}
+{%     for rule, config in destination.rule.items() if config.disable is not vyos_defined %}
+{{ nptv6_rule(rule, config, 'PREROUTING') }}
+{%     endfor %}
+{% endif %}
+#
+# Source NAT66 rules build up here
+#
+{% if source.rule is vyos_defined %}
+{%     for rule, config in source.rule.items() if config.disable is not vyos_defined %}
+{{ nptv6_rule(rule, config, 'POSTROUTING') }}
+{%     endfor %}
+{% endif %}
-- 
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