Merge pull request #2539 from nicolas-fort/T5775

T5775: firewall: re-add state-policy to firewall. These commands are …

2 files changed, 58 insertions, 3 deletions

diff --git a/data/templates/firewall/nftables-zone.j2 b/data/templates/firewall/nftables-zone.j2
index beb14ff00..5e55099ca 100644
--- a/data/templates/firewall/nftables-zone.j2
+++ b/data/templates/firewall/nftables-zone.j2
@@ -1,5 +1,5 @@
 
-{% macro zone_chains(zone, family) %}
+{% macro zone_chains(zone, family, state_policy=False) %}
 {% if family == 'ipv6' %}
 {%     set fw_name = 'ipv6_name' %}
 {%     set suffix = '6' %}
@@ -10,6 +10,9 @@
 
     chain VYOS_ZONE_FORWARD {
         type filter hook forward priority 1; policy accept;
+{% if state_policy %}
+        jump VYOS_STATE_POLICY{{ suffix }}
+{% endif %}
 {% for zone_name, zone_conf in zone.items() %}
 {%     if 'local_zone' not in zone_conf %}
         oifname { {{ zone_conf.interface | join(',') }} } counter jump VZONE_{{ zone_name }}
@@ -18,6 +21,9 @@
     }
     chain VYOS_ZONE_LOCAL {
         type filter hook input priority 1; policy accept;
+{% if state_policy %}
+        jump VYOS_STATE_POLICY{{ suffix }}
+{% endif %}
 {% for zone_name, zone_conf in zone.items() %}
 {%     if 'local_zone' in zone_conf %}
         counter jump VZONE_{{ zone_name }}_IN
@@ -26,6 +32,9 @@
     }
     chain VYOS_ZONE_OUTPUT {
         type filter hook output priority 1; policy accept;
+{% if state_policy %}
+        jump VYOS_STATE_POLICY{{ suffix }}
+{% endif %}
 {% for zone_name, zone_conf in zone.items() %}
 {%     if 'local_zone' in zone_conf %}
         counter jump VZONE_{{ zone_name }}_OUT
diff --git a/data/templates/firewall/nftables.j2 b/data/templates/firewall/nftables.j2
index 63195d25f..e0ad0e00a 100644
--- a/data/templates/firewall/nftables.j2
+++ b/data/templates/firewall/nftables.j2
@@ -46,6 +46,9 @@ table ip vyos_filter {
 {%         for prior, conf in ipv4.forward.items() %}
     chain VYOS_FORWARD_{{ prior }} {
         type filter hook forward priority {{ prior }}; policy accept;
+{%             if global_options.state_policy is vyos_defined %}
+        jump VYOS_STATE_POLICY
+{%             endif %}
 {%             if conf.rule is vyos_defined %}
 {%                 for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %}
         {{ rule_conf | nft_rule('FWD', prior, rule_id) }}
@@ -63,6 +66,9 @@ table ip vyos_filter {
 {%         for prior, conf in ipv4.input.items() %}
     chain VYOS_INPUT_{{ prior }} {
         type filter hook input priority {{ prior }}; policy accept;
+{%             if global_options.state_policy is vyos_defined %}
+        jump VYOS_STATE_POLICY
+{%             endif %}
 {%             if conf.rule is vyos_defined %}
 {%                 for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %}
         {{ rule_conf | nft_rule('INP',prior, rule_id) }}
@@ -80,6 +86,9 @@ table ip vyos_filter {
 {%         for prior, conf in ipv4.output.items() %}
     chain VYOS_OUTPUT_{{ prior }} {
         type filter hook output priority {{ prior }}; policy accept;
+{%             if global_options.state_policy is vyos_defined %}
+        jump VYOS_STATE_POLICY
+{%             endif %}
 {%             if conf.rule is vyos_defined %}
 {%                 for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %}
         {{ rule_conf | nft_rule('OUT', prior, rule_id) }}
@@ -154,7 +163,21 @@ table ip vyos_filter {
 {{ group_tmpl.groups(group, False, True) }}
 
 {% if zone is vyos_defined %}
-{{ zone_tmpl.zone_chains(zone, 'ipv4') }}
+{{ zone_tmpl.zone_chains(zone, 'ipv4', global_options.state_policy is vyos_defined) }}
+{% endif %}
+{% if global_options.state_policy is vyos_defined %}
+    chain VYOS_STATE_POLICY {
+{%     if global_options.state_policy.established is vyos_defined %}
+        {{ global_options.state_policy.established | nft_state_policy('established') }}
+{%     endif %}
+{%     if global_options.state_policy.invalid is vyos_defined %}
+        {{ global_options.state_policy.invalid | nft_state_policy('invalid') }}
+{%     endif %}
+{%     if global_options.state_policy.related is vyos_defined %}
+        {{ global_options.state_policy.related | nft_state_policy('related') }}
+{%     endif %}
+        return
+    }
 {% endif %}
 }
 
@@ -174,6 +197,9 @@ table ip6 vyos_filter {
 {%         for prior, conf in ipv6.forward.items() %}
     chain VYOS_IPV6_FORWARD_{{ prior }} {
         type filter hook forward priority {{ prior }}; policy accept;
+{%             if global_options.state_policy is vyos_defined %}
+        jump VYOS_STATE_POLICY6
+{%             endif %}
 {%             if conf.rule is vyos_defined %}
 {%                 for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %}
         {{ rule_conf | nft_rule('FWD', prior, rule_id ,'ip6') }}
@@ -191,6 +217,9 @@ table ip6 vyos_filter {
 {%         for prior, conf in ipv6.input.items() %}
     chain VYOS_IPV6_INPUT_{{ prior }} {
         type filter hook input priority {{ prior }}; policy accept;
+{%             if global_options.state_policy is vyos_defined %}
+        jump VYOS_STATE_POLICY6
+{%             endif %}
 {%             if conf.rule is vyos_defined %}
 {%                 for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %}
         {{ rule_conf | nft_rule('INP', prior, rule_id ,'ip6') }}
@@ -208,6 +237,9 @@ table ip6 vyos_filter {
 {%         for prior, conf in ipv6.output.items() %}
     chain VYOS_IPV6_OUTPUT_{{ prior }} {
         type filter hook output priority {{ prior }}; policy accept;
+{%             if global_options.state_policy is vyos_defined %}
+        jump VYOS_STATE_POLICY6
+{%             endif %}
 {%             if conf.rule is vyos_defined %}
 {%                 for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %}
         {{ rule_conf | nft_rule('OUT', prior, rule_id ,'ip6') }}
@@ -266,7 +298,21 @@ table ip6 vyos_filter {
 {% endif %}
 {{ group_tmpl.groups(group, True, True) }}
 {% if zone is vyos_defined %}
-{{ zone_tmpl.zone_chains(zone, 'ipv6') }}
+{{ zone_tmpl.zone_chains(zone, 'ipv6', global_options.state_policy is vyos_defined) }}
+{% endif %}
+{% if global_options.state_policy is vyos_defined %}
+    chain VYOS_STATE_POLICY6 {
+{%     if global_options.state_policy.established is vyos_defined %}
+        {{ global_options.state_policy.established | nft_state_policy('established') }}
+{%     endif %}
+{%     if global_options.state_policy.invalid is vyos_defined %}
+        {{ global_options.state_policy.invalid | nft_state_policy('invalid') }}
+{%     endif %}
+{%     if global_options.state_policy.related is vyos_defined %}
+        {{ global_options.state_policy.related | nft_state_policy('related') }}
+{%     endif %}
+        return
+    }
 {% endif %}
 }