T6687: add fqdn support to nat rules.

(cherry picked from commit 4c3d037f036e84c77333a400b35bb1a628a1a118)

2 files changed, 34 insertions, 7 deletions

diff --git a/src/conf_mode/firewall.py b/src/conf_mode/firewall.py
index 9974a1466..f575843f3 100755
--- a/src/conf_mode/firewall.py
+++ b/src/conf_mode/firewall.py
@@ -36,10 +36,14 @@ from vyos.utils.process import cmd
 from vyos.utils.process import rc_cmd
 from vyos import ConfigError
 from vyos import airbag
+from pathlib import Path
 
 airbag.enable()
 
 nftables_conf = '/run/nftables.conf'
+domain_resolver_usage = '/run/use-vyos-domain-resolver-firewall'
+domain_resolver_usage_nat = '/run/use-vyos-domain-resolver-nat'
+
 sysctl_file = r'/run/sysctl/10-vyos-firewall.conf'
 
 valid_groups = [
@@ -122,7 +126,7 @@ def get_config(config=None):
 
     firewall['geoip_updated'] = geoip_updated(conf, firewall)
 
-    fqdn_config_parse(firewall)
+    fqdn_config_parse(firewall, 'firewall')
 
     set_dependents('conntrack', conf)
 
@@ -467,12 +471,15 @@ def apply(firewall):
 
     call_dependents()
 
-    # T970 Enable a resolver (systemd daemon) that checks
-    # domain-group/fqdn addresses and update entries for domains by timeout
-    # If router loaded without internet connection or for synchronization
-    domain_action = 'stop'
-    if dict_search_args(firewall, 'group', 'domain_group') or firewall['ip_fqdn'] or firewall['ip6_fqdn']:
-        domain_action = 'restart'
+    ## DOMAIN RESOLVER
+    domain_action = 'restart'
+    if dict_search_args(firewall, 'group', 'domain_group') or firewall['ip_fqdn'].items() or firewall['ip6_fqdn'].items():
+        text = f'# Automatically generated by firewall.py\nThis file indicates that vyos-domain-resolver service is used by the firewall.\n'
+        Path(domain_resolver_usage).write_text(text)
+    else:
+        Path(domain_resolver_usage).unlink(missing_ok=True)
+        if not Path('/run').glob('use-vyos-domain-resolver*'):
+            domain_action = 'stop'
     call(f'systemctl {domain_action} vyos-domain-resolver.service')
 
     if firewall['geoip_updated']:
diff --git a/src/conf_mode/nat.py b/src/conf_mode/nat.py
index 39803fa02..98b2f3f29 100755
--- a/src/conf_mode/nat.py
+++ b/src/conf_mode/nat.py
@@ -26,10 +26,13 @@ from vyos.template import is_ip_network
 from vyos.utils.kernel import check_kmod
 from vyos.utils.dict import dict_search
 from vyos.utils.dict import dict_search_args
+from vyos.utils.file import write_file
 from vyos.utils.process import cmd
 from vyos.utils.process import run
+from vyos.utils.process import call
 from vyos.utils.network import is_addr_assigned
 from vyos.utils.network import interface_exists
+from vyos.firewall import fqdn_config_parse
 from vyos import ConfigError
 
 from vyos import airbag
@@ -39,6 +42,8 @@ k_mod = ['nft_nat', 'nft_chain_nat']
 
 nftables_nat_config = '/run/nftables_nat.conf'
 nftables_static_nat_conf = '/run/nftables_static-nat-rules.nft'
+domain_resolver_usage = '/run/use-vyos-domain-resolver-nat'
+domain_resolver_usage_firewall = '/run/use-vyos-domain-resolver-firewall'
 
 valid_groups = [
     'address_group',
@@ -71,6 +76,8 @@ def get_config(config=None):
     if 'dynamic_group' in nat['firewall_group']:
         del nat['firewall_group']['dynamic_group']
 
+    fqdn_config_parse(nat, 'nat')
+
     return nat
 
 def verify_rule(config, err_msg, groups_dict):
@@ -251,6 +258,19 @@ def apply(nat):
 
     call_dependents()
 
+    # DOMAIN RESOLVER
+    if nat and 'deleted' not in nat:
+        domain_action = 'restart'
+        if nat['ip_fqdn'].items():
+            text = f'# Automatically generated by nat.py\nThis file indicates that vyos-domain-resolver service is used by nat.\n'
+            write_file(domain_resolver_usage, text)
+        elif os.path.exists(domain_resolver_usage):
+            os.unlink(domain_resolver_usage)
+            if not os.path.exists(domain_resolver_usage_firewall):
+                # Firewall not using domain resolver
+                domain_action = 'stop'
+        call(f'systemctl {domain_action} vyos-domain-resolver.service')
+
     return None
 
 if __name__ == '__main__':