Add ARP offload for APFv6 multi-devices tests

Test: m connectivity_multi_devices_snippet && atest CtsConnectivityMultiDevicesTestCases
Change-Id: I32dae14d3bd6400ff47cc545410242f2ccd8f1ab

tests/cts/multidevices/Android.bp

@@ -22,6 +22,7 @@ python_test_host {
     main: "run_tests.py",
     srcs: [
         "apfv4_test.py",
+        "apfv6_test.py",
         "connectivity_multi_devices_test.py",
         "run_tests.py",
     ],

tests/cts/multidevices/apfv6_test.py

@@ -0,0 +1,84 @@
+#  Copyright (C) 2024 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+from mobly import asserts
+from net_tests_utils.host.python import apf_test_base, apf_utils, adb_utils, assert_utils, packet_utils
+
+APFV6_VERSION = 6000
+ARP_OFFLOAD_REPLY_LEN = 60
+
+class ApfV6Test(apf_test_base.ApfTestBase):
+    def setup_class(self):
+        super().setup_class()
+
+        # Skip tests for APF version < 6000
+        apf_utils.assume_apf_version_support_at_least(
+            self.clientDevice, self.client_iface_name, APFV6_VERSION
+        )
+
+    def teardown_class(self):
+        # force to stop capture on the server device if any test case failed
+        try:
+            apf_utils.stop_capture_packets(self.serverDevice, self.server_iface_name)
+        except assert_utils.UnexpectedBehaviorError:
+            pass
+        super().teardown_class()
+
+    def test_unicast_arp_request_offload(self):
+        arp_request = packet_utils.construct_arp_packet(
+            src_mac=self.server_mac_address,
+            dst_mac=self.client_mac_address,
+            src_ip=self.server_ipv4_addresses[0],
+            dst_ip=self.client_ipv4_addresses[0],
+            op=packet_utils.ARP_REQUEST_OP
+        )
+
+        arp_reply = packet_utils.construct_arp_packet(
+            src_mac=self.client_mac_address,
+            dst_mac=self.server_mac_address,
+            src_ip=self.client_ipv4_addresses[0],
+            dst_ip=self.server_ipv4_addresses[0],
+            op=packet_utils.ARP_REPLY_OP
+        )
+
+        # Add zero padding up to 60 bytes, since APFv6 ARP offload always sent out 60 bytes reply
+        arp_reply = arp_reply.ljust(ARP_OFFLOAD_REPLY_LEN * 2, "0")
+
+        self.send_packet_and_expect_reply_received(
+            arp_request, "DROPPED_ARP_REQUEST_REPLIED", arp_reply
+        )
+
+    def test_broadcast_arp_request_offload(self):
+        arp_request = packet_utils.construct_arp_packet(
+            src_mac=self.server_mac_address,
+            dst_mac=packet_utils.ETHER_BROADCAST_MAC_ADDRESS,
+            src_ip=self.server_ipv4_addresses[0],
+            dst_ip=self.client_ipv4_addresses[0],
+            op=packet_utils.ARP_REQUEST_OP
+        )
+
+        arp_reply = packet_utils.construct_arp_packet(
+            src_mac=self.client_mac_address,
+            dst_mac=self.server_mac_address,
+            src_ip=self.client_ipv4_addresses[0],
+            dst_ip=self.server_ipv4_addresses[0],
+            op=packet_utils.ARP_REPLY_OP
+        )
+
+        # Add zero padding up to 60 bytes, since APFv6 ARP offload always sent out 60 bytes reply
+        arp_reply = arp_reply.ljust(ARP_OFFLOAD_REPLY_LEN * 2, "0")
+
+        self.send_packet_and_expect_reply_received(
+            arp_request, "DROPPED_ARP_REQUEST_REPLIED", arp_reply
+        )

tests/cts/multidevices/run_tests.py

@@ -16,6 +16,7 @@
 
 import sys
 from apfv4_test import ApfV4Test
+from apfv6_test import ApfV6Test
 from connectivity_multi_devices_test import ConnectivityMultiDevicesTest
 from mobly import suite_runner
 
@@ -35,4 +36,4 @@ if __name__ == "__main__":
     index = sys.argv.index("--")
     sys.argv = sys.argv[:1] + sys.argv[index + 1 :]
   # TODO: make the tests can be executed without manually list classes.
-  suite_runner.run_suite([ConnectivityMultiDevicesTest, ApfV4Test], sys.argv)
+  suite_runner.run_suite([ConnectivityMultiDevicesTest, ApfV4Test, ApfV6Test], sys.argv)