firewall: policy: T4178: Migrate and refactor tcp flags

* Add support for ECN and CWR flags

3 files changed, 22 insertions, 9 deletions

diff --git a/smoketest/configs/dialup-router-medium-vpn b/smoketest/configs/dialup-router-medium-vpn
index 7ca540b66..63d955738 100644
--- a/smoketest/configs/dialup-router-medium-vpn
+++ b/smoketest/configs/dialup-router-medium-vpn
@@ -6,6 +6,15 @@ firewall {
     ipv6-src-route disable
     ip-src-route disable
     log-martians enable
+    name test_tcp_flags {
+        rule 1 {
+            action drop
+            protocol tcp
+            tcp {
+                flags SYN,ACK,!RST,!FIN
+            }
+        }
+    }
     options {
         interface vtun0 {
             adjust-mss 1380
diff --git a/smoketest/scripts/cli/test_firewall.py b/smoketest/scripts/cli/test_firewall.py
index 2b3b354ba..c70743a9f 100755
--- a/smoketest/scripts/cli/test_firewall.py
+++ b/smoketest/scripts/cli/test_firewall.py
@@ -53,7 +53,7 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase):
         self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'source', 'group', 'network-group', 'smoketest_network'])
         self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'destination', 'address', '172.16.10.10'])
         self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'destination', 'group', 'port-group', 'smoketest_port'])
-        self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'protocol', 'tcp'])
+        self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'protocol', 'tcp_udp'])
 
         self.cli_set(['interfaces', 'ethernet', 'eth0', 'firewall', 'in', 'name', 'smoketest'])
 
@@ -61,7 +61,7 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase):
 
         nftables_search = [
             ['iifname "eth0"', 'jump smoketest'],
-            ['ip saddr { 172.16.99.0/24 }', 'ip daddr 172.16.10.10', 'tcp dport { 53, 123 }', 'return'],
+            ['ip saddr { 172.16.99.0/24 }', 'ip daddr 172.16.10.10', 'th dport { 53, 123 }', 'return'],
         ]
 
         nftables_output = cmd('sudo nft list table ip filter')
@@ -72,7 +72,7 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase):
                 if all(item in line for item in search):
                     matched = True
                     break
-            self.assertTrue(matched)
+            self.assertTrue(matched, msg=search)
 
     def test_basic_rules(self):
         self.cli_set(['firewall', 'name', 'smoketest', 'default-action', 'drop'])
@@ -80,8 +80,10 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase):
         self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'source', 'address', '172.16.20.10'])
         self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'destination', 'address', '172.16.10.10'])
         self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'action', 'reject'])
-        self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'protocol', 'tcp_udp'])
+        self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'protocol', 'tcp'])
         self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'destination', 'port', '8888'])
+        self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'tcp', 'flags', 'syn'])
+        self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'tcp', 'flags', 'not', 'ack'])
 
         self.cli_set(['interfaces', 'ethernet', 'eth0', 'firewall', 'in', 'name', 'smoketest'])
 
@@ -90,7 +92,7 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase):
         nftables_search = [
             ['iifname "eth0"', 'jump smoketest'],
             ['saddr 172.16.20.10', 'daddr 172.16.10.10', 'return'],
-            ['meta l4proto { tcp, udp }', 'th dport { 8888 }', 'reject'],
+            ['tcp flags & (syn | ack) == syn', 'tcp dport { 8888 }', 'reject'],
             ['smoketest default-action', 'drop']
         ]
 
@@ -102,7 +104,7 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase):
                 if all(item in line for item in search):
                     matched = True
                     break
-            self.assertTrue(matched)
+            self.assertTrue(matched, msg=search)
 
     def test_basic_rules_ipv6(self):
         self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'default-action', 'drop'])
@@ -132,7 +134,7 @@ class TestFirewall(VyOSUnitTestSHIM.TestCase):
                 if all(item in line for item in search):
                     matched = True
                     break
-            self.assertTrue(matched)
+            self.assertTrue(matched, msg=search)
 
     def test_state_policy(self):
         self.cli_set(['firewall', 'state-policy', 'established', 'action', 'accept'])
diff --git a/smoketest/scripts/cli/test_policy_route.py b/smoketest/scripts/cli/test_policy_route.py
index 4463a2255..9035f0832 100755
--- a/smoketest/scripts/cli/test_policy_route.py
+++ b/smoketest/scripts/cli/test_policy_route.py
@@ -63,8 +63,10 @@ class TestPolicyRoute(VyOSUnitTestSHIM.TestCase):
             self.assertTrue(matched)
 
     def test_pbr_table(self):
-        self.cli_set(['policy', 'route', 'smoketest', 'rule', '1', 'protocol', 'tcp_udp'])
+        self.cli_set(['policy', 'route', 'smoketest', 'rule', '1', 'protocol', 'tcp'])
         self.cli_set(['policy', 'route', 'smoketest', 'rule', '1', 'destination', 'port', '8888'])
+        self.cli_set(['policy', 'route', 'smoketest', 'rule', '1', 'tcp', 'flags', 'syn'])
+        self.cli_set(['policy', 'route', 'smoketest', 'rule', '1', 'tcp', 'flags', 'not', 'ack'])
         self.cli_set(['policy', 'route', 'smoketest', 'rule', '1', 'set', 'table', table_id])
         self.cli_set(['policy', 'route6', 'smoketest6', 'rule', '1', 'protocol', 'tcp_udp'])
         self.cli_set(['policy', 'route6', 'smoketest6', 'rule', '1', 'destination', 'port', '8888'])
@@ -81,7 +83,7 @@ class TestPolicyRoute(VyOSUnitTestSHIM.TestCase):
 
         nftables_search = [
             ['iifname "eth0"', 'jump VYOS_PBR_smoketest'],
-            ['meta l4proto { tcp, udp }', 'th dport { 8888 }', 'meta mark set ' + mark_hex]
+            ['tcp flags & (syn | ack) == syn', 'tcp dport { 8888 }', 'meta mark set ' + mark_hex]
         ]
 
         nftables_output = cmd('sudo nft list table ip mangle')