1 files changed, 146 insertions, 0 deletions
diff --git a/test/test_policer_input.py b/test/test_policer_input.py
new file mode 100644
index 00000000000..c95f6643ff2
--- /dev/null
+++ b/test/test_policer_input.py
@@ -0,0 +1,146 @@
+#!/usr/bin/env python3
+# Copyright (c) 2021 Graphiant, Inc.
+
+import unittest
+import scapy.compat
+from scapy.layers.inet import IP, UDP
+from scapy.layers.l2 import Ether
+from scapy.packet import Raw
+from framework import VppTestCase, VppTestRunner
+from vpp_papi import VppEnum
+from vpp_policer import VppPolicer, PolicerAction
+
+NUM_PKTS = 67
+
+
+class TestPolicerInput(VppTestCase):
+    """ Policer on an input interface """
+    vpp_worker_count = 2
+
+    def setUp(self):
+        super(TestPolicerInput, self).setUp()
+
+        self.create_pg_interfaces(range(2))
+        for i in self.pg_interfaces:
+            i.admin_up()
+            i.config_ip4()
+            i.resolve_arp()
+
+        self.pkt = (Ether(src=self.pg0.remote_mac,
+                          dst=self.pg0.local_mac) /
+                    IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+                    UDP(sport=1234, dport=1234) /
+                    Raw(b'\xa5' * 100))
+
+    def tearDown(self):
+        for i in self.pg_interfaces:
+            i.unconfig_ip4()
+            i.admin_down()
+        super(TestPolicerInput, self).tearDown()
+
+    def test_policer_input(self):
+        """ Input Policing """
+        pkts = self.pkt * NUM_PKTS
+
+        action_tx = PolicerAction(
+            VppEnum.vl_api_sse2_qos_action_type_t.SSE2_QOS_ACTION_API_TRANSMIT,
+            0)
+        policer = VppPolicer(self, "pol1", 80, 0, 1000, 0,
+                             conform_action=action_tx,
+                             exceed_action=action_tx,
+                             violate_action=action_tx)
+        policer.add_vpp_config()
+
+        # Start policing on pg0
+        policer.apply_vpp_config(self.pg0.sw_if_index, True)
+
+        rx = self.send_and_expect(self.pg0, pkts, self.pg1, worker=0)
+        stats = policer.get_stats()
+
+        # Single rate, 2 colour policer - expect conform, violate but no exceed
+        self.assertGreater(stats['conform_packets'], 0)
+        self.assertEqual(stats['exceed_packets'], 0)
+        self.assertGreater(stats['violate_packets'], 0)
+
+        # Stop policing on pg0
+        policer.apply_vpp_config(self.pg0.sw_if_index, False)
+
+        rx = self.send_and_expect(self.pg0, pkts, self.pg1, worker=0)
+
+        statsnew = policer.get_stats()
+
+        # No new packets counted
+        self.assertEqual(stats, statsnew)
+
+        policer.remove_vpp_config()
+
+    def test_policer_handoff(self):
+        """ Worker thread handoff """
+        pkts = self.pkt * NUM_PKTS
+
+        action_tx = PolicerAction(
+            VppEnum.vl_api_sse2_qos_action_type_t.SSE2_QOS_ACTION_API_TRANSMIT,
+            0)
+        policer = VppPolicer(self, "pol2", 80, 0, 1000, 0,
+                             conform_action=action_tx,
+                             exceed_action=action_tx,
+                             violate_action=action_tx)
+        policer.add_vpp_config()
+
+        # Bind the policer to worker 1
+        policer.bind_vpp_config(1, True)
+
+        # Start policing on pg0
+        policer.apply_vpp_config(self.pg0.sw_if_index, True)
+
+        for worker in [0, 1]:
+            self.send_and_expect(self.pg0, pkts, self.pg1, worker=worker)
+            self.logger.debug(self.vapi.cli("show trace max 100"))
+
+        stats = policer.get_stats()
+        stats0 = policer.get_stats(worker=0)
+        stats1 = policer.get_stats(worker=1)
+
+        # Worker 1, should have done all the policing
+        self.assertEqual(stats, stats1)
+
+        # Worker 0, should have handed everything off
+        self.assertEqual(stats0['conform_packets'], 0)
+        self.assertEqual(stats0['exceed_packets'], 0)
+        self.assertEqual(stats0['violate_packets'], 0)
+
+        # Unbind the policer from worker 1 and repeat
+        policer.bind_vpp_config(1, False)
+        for worker in [0, 1]:
+            self.send_and_expect(self.pg0, pkts, self.pg1, worker=worker)
+            self.logger.debug(self.vapi.cli("show trace max 100"))
+
+        # The policer should auto-bind to worker 0 when packets arrive
+        stats = policer.get_stats()
+
+        # The 2 workers should now have policed the same amount
+        stats = policer.get_stats()
+        stats0 = policer.get_stats(worker=0)
+        stats1 = policer.get_stats(worker=1)
+
+        self.assertGreater(stats0['conform_packets'], 0)
+        self.assertEqual(stats0['exceed_packets'], 0)
+        self.assertGreater(stats0['violate_packets'], 0)
+
+        self.assertGreater(stats1['conform_packets'], 0)
+        self.assertEqual(stats1['exceed_packets'], 0)
+        self.assertGreater(stats1['violate_packets'], 0)
+
+        self.assertEqual(stats0['conform_packets'] + stats1['conform_packets'],
+                         stats['conform_packets'])
+
+        self.assertEqual(stats0['violate_packets'] + stats1['violate_packets'],
+                         stats['violate_packets'])
+
+        # Stop policing on pg0
+        policer.apply_vpp_config(self.pg0.sw_if_index, False)
+
+        policer.remove_vpp_config()
+
+if __name__ == '__main__':
+    unittest.main(testRunner=VppTestRunner)