1 files changed, 103 insertions, 0 deletions
diff --git a/test/test_vlib.py b/test/test_vlib.py
index 76a55e65a03..7caeb0227bf 100644
--- a/test/test_vlib.py
+++ b/test/test_vlib.py
@@ -7,6 +7,9 @@ import signal
 from config import config
 from framework import VppTestCase, VppTestRunner
 from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath
+from scapy.layers.inet import IP, ICMP
+from scapy.layers.l2 import Ether
+from scapy.packet import Raw
 
 
 @unittest.skipUnless(config.gcov, "part of code coverage tests")
@@ -220,5 +223,105 @@ class TestVlib(VppTestCase):
                     self.logger.info(cmd + " FAIL retval " + str(r.retval))
 
 
+class TestVlibFrameLeak(VppTestCase):
+    """Vlib Frame Leak Test Cases"""
+
+    vpp_worker_count = 1
+
+    @classmethod
+    def setUpClass(cls):
+        super(TestVlibFrameLeak, cls).setUpClass()
+
+    @classmethod
+    def tearDownClass(cls):
+        super(TestVlibFrameLeak, cls).tearDownClass()
+
+    def setUp(self):
+        super(TestVlibFrameLeak, self).setUp()
+        # create 1 pg interface
+        self.create_pg_interfaces(range(1))
+
+        for i in self.pg_interfaces:
+            i.admin_up()
+            i.config_ip4()
+            i.resolve_arp()
+
+    def tearDown(self):
+        super(TestVlibFrameLeak, self).tearDown()
+        for i in self.pg_interfaces:
+            i.unconfig_ip4()
+            i.admin_down()
+
+    def test_vlib_mw_refork_frame_leak(self):
+        """Vlib worker thread refork leak test case"""
+        icmp_id = 0xB
+        icmp_seq = 5
+        icmp_load = b"\x0a" * 18
+        pkt = (
+            Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
+            / IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4)
+            / ICMP(id=icmp_id, seq=icmp_seq)
+            / Raw(load=icmp_load)
+        )
+
+        # Send a packet
+        self.pg0.add_stream(pkt)
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+
+        rx = self.pg0.get_capture(1)
+
+        self.assertEquals(len(rx), 1)
+        rx = rx[0]
+        ether = rx[Ether]
+        ipv4 = rx[IP]
+
+        self.assertEqual(ether.src, self.pg0.local_mac)
+        self.assertEqual(ether.dst, self.pg0.remote_mac)
+
+        self.assertEqual(ipv4.src, self.pg0.local_ip4)
+        self.assertEqual(ipv4.dst, self.pg0.remote_ip4)
+
+        # Save allocated frame count
+        frame_allocated = {}
+        for fs in self.vapi.cli("show vlib frame-allocation").splitlines()[1:]:
+            spl = fs.split()
+            thread = int(spl[0])
+            size = int(spl[1])
+            alloc = int(spl[2])
+            key = (thread, size)
+            frame_allocated[key] = alloc
+
+        # cause reforks
+        _ = self.create_loopback_interfaces(1)
+
+        # send the same packet
+        self.pg0.add_stream(pkt)
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+
+        rx = self.pg0.get_capture(1)
+
+        self.assertEquals(len(rx), 1)
+        rx = rx[0]
+        ether = rx[Ether]
+        ipv4 = rx[IP]
+
+        self.assertEqual(ether.src, self.pg0.local_mac)
+        self.assertEqual(ether.dst, self.pg0.remote_mac)
+
+        self.assertEqual(ipv4.src, self.pg0.local_ip4)
+        self.assertEqual(ipv4.dst, self.pg0.remote_ip4)
+
+        # Check that no frame were leaked during refork
+        for fs in self.vapi.cli("show vlib frame-allocation").splitlines()[1:]:
+            spl = fs.split()
+            thread = int(spl[0])
+            size = int(spl[1])
+            alloc = int(spl[2])
+            key = (thread, size)
+            self.assertEqual(frame_allocated[key], alloc)
+
+
 if __name__ == "__main__":
     unittest.main(testRunner=VppTestRunner)