Merge branch 'tc-testing-dnat-tuple-collision'

Marcelo Ricardo Leitner says:

====================
tc-testing: add test for ct DNAT tuple collision

That was fixed in 13c62f53 ("net/sched: act_ct: handle DNAT tuple
collision").

For that, it requires that tdc is able to send diverse packets with
scapy, which is then done on the 2nd patch of this series.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/tc-testing/plugin-lib/scapyPlugin.py

@@ -29,22 +29,26 @@ class SubPlugin(TdcPlugin):
             return
 
         # Check for required fields
-        scapyinfo = self.args.caseinfo['scapy']
-        scapy_keys = ['iface', 'count', 'packet']
-        missing_keys = []
-        keyfail = False
-        for k in scapy_keys:
-            if k not in scapyinfo:
-                keyfail = True
-                missing_keys.add(k)
-        if keyfail:
-            print('{}: Scapy block present in the test, but is missing info:'
-                .format(self.sub_class))
-            print('{}'.format(missing_keys))
-
-        pkt = eval(scapyinfo['packet'])
-        if '$' in scapyinfo['iface']:
-            tpl = Template(scapyinfo['iface'])
-            scapyinfo['iface'] = tpl.safe_substitute(NAMES)
-        for count in range(scapyinfo['count']):
-            sendp(pkt, iface=scapyinfo['iface'])
+        lscapyinfo = self.args.caseinfo['scapy']
+        if type(lscapyinfo) != list:
+            lscapyinfo = [ lscapyinfo, ]
+
+        for scapyinfo in lscapyinfo:
+            scapy_keys = ['iface', 'count', 'packet']
+            missing_keys = []
+            keyfail = False
+            for k in scapy_keys:
+                if k not in scapyinfo:
+                    keyfail = True
+                    missing_keys.append(k)
+            if keyfail:
+                print('{}: Scapy block present in the test, but is missing info:'
+                    .format(self.sub_class))
+                print('{}'.format(missing_keys))
+
+            pkt = eval(scapyinfo['packet'])
+            if '$' in scapyinfo['iface']:
+                tpl = Template(scapyinfo['iface'])
+                scapyinfo['iface'] = tpl.safe_substitute(NAMES)
+            for count in range(scapyinfo['count']):
+                sendp(pkt, iface=scapyinfo['iface'])

tools/testing/selftests/tc-testing/tc-tests/actions/ct.json

@@ -406,5 +406,50 @@
         "teardown": [
             "$TC actions flush action ct"
         ]
+    },
+    {
+        "id": "3992",
+        "name": "Add ct action triggering DNAT tuple conflict",
+        "category": [
+            "actions",
+            "ct",
+	    "scapy"
+        ],
+	"plugins": {
+		"requires": [
+			"nsPlugin",
+			"scapyPlugin"
+		]
+	},
+        "setup": [
+            [
+                "$TC qdisc del dev $DEV1 ingress",
+                0,
+                1,
+		2,
+                255
+            ],
+	    "$TC qdisc add dev $DEV1 ingress"
+        ],
+        "cmdUnderTest": "$TC filter add dev $DEV1 ingress protocol ip prio 1 flower ct_state -trk action ct commit nat dst addr 20.0.0.1 port 10 pipe action drop",
+	"scapy": [
+	    {
+		"iface": "$DEV0",
+		"count": 1,
+		"packet": "Ether(type=0x800)/IP(src='10.0.0.10',dst='10.0.0.10')/TCP(sport=5000,dport=10)"
+	    },
+	    {
+		"iface": "$DEV0",
+		"count": 1,
+		"packet": "Ether(type=0x800)/IP(src='10.0.0.10',dst='10.0.0.20')/TCP(sport=5000,dport=10)"
+	    }
+	],
+        "expExitCode": "0",
+        "verifyCmd": "cat /proc/net/nf_conntrack",
+        "matchPattern": "dst=10.0.0.20",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
     }
 ]