Add QinQ test suite, which verifies PMD behavior when sending QinQ (IEEE 802.1ad) packets.
Signed-off-by: Dean Marx <[email protected]> Reviewed-by: Patrick Robb <[email protected]> --- dts/tests/TestSuite_qinq.py | 206 ++++++++++++++++++++++++++++++++++++ 1 file changed, 206 insertions(+) create mode 100644 dts/tests/TestSuite_qinq.py diff --git a/dts/tests/TestSuite_qinq.py b/dts/tests/TestSuite_qinq.py new file mode 100644 index 0000000000..bb385a0d91 --- /dev/null +++ b/dts/tests/TestSuite_qinq.py @@ -0,0 +1,206 @@ +# SPDX-License-Identifier: BSD-3-Clause +# Copyright(c) 2025 University of New Hampshire + +"""QinQ (802.1ad) Test Suite. + +This test suite verifies the correctness and capability of DPDK Poll Mode Drivers (PMDs) +in handling QinQ-tagged Ethernet frames, which contain a pair of stacked VLAN headers +(outer S-VLAN and inner C-VLAN). These tests ensure that both software and hardware offloads +related to QinQ behave as expected across different NIC vendors and PMD implementations. +""" + +from typing import Optional + +from scapy.layers.inet import IP, UDP +from scapy.layers.l2 import Dot1AD, Dot1Q, Ether +from scapy.packet import Packet, Raw + +from api.capabilities import NicCapability, requires_nic_capability +from api.packet import send_packet_and_capture +from api.test import log, verify +from api.testpmd import TestPmd +from framework.test_suite import TestSuite, func_test + + +class TestQinq(TestSuite): + """QinQ test suite. + + This suite consists of 2 test cases: + 1. QinQ Forwarding: Send a QinQ packet and verify the received packet contains + both QinQ/VLAN layers. + 2. QinQ Strip: Enable VLAN/QinQ stripping and verify sent packets are received with the + expected VLAN/QinQ layers. + """ + + def _send_packet_and_verify( + self, packet: Packet, testpmd: TestPmd, should_receive: bool + ) -> None: + """Send packet and verify reception. + + Args: + packet: The packet to send to testpmd. + testpmd: The testpmd session to send commands to. + should_receive: If :data:`True`, verifies packet was received. + """ + testpmd.start() + packets = send_packet_and_capture(packet=packet) + test_packet = self._get_relevant_packet(packets) + if should_receive: + verify(test_packet is not None, "Packet was dropped when it should have been received.") + else: + verify(test_packet is None, "Packet was received when it should have been dropped.") + + def _strip_verify(self, packet: Optional[Packet], expects_tag: bool, context: str) -> bool: + """Helper method for verifying packet stripping functionality. + + Returns: :data:`True` if tags are stripped or not stripped accordingly, + otherwise :data:`False` + """ + if packet is None: + log(f"{context} packet was dropped when it should have been received.") + return False + + if not expects_tag: + if packet.haslayer(Dot1Q) or packet.haslayer(Dot1AD): + log( + f"VLAN tags found in packet when should have been stripped: " + f"{packet.summary()}\tsent packet: {context}", + ) + return False + + if expects_tag: + if vlan_layer := packet.getlayer(Dot1Q): + if vlan_layer.vlan != 200: + log( + f"Expected VLAN ID 200 but found ID {vlan_layer.vlan}: " + f"{packet.summary()}\tsent packet: {context}", + ) + return False + else: + log( + f"Expected 0x8100 VLAN tag but none found: {packet.summary()}" + f"\tsent packet: {context}" + ) + return False + + return True + + def _get_relevant_packet(self, packet_list: list[Packet]) -> Optional[Packet]: + """Helper method for checking received packet list for sent packet.""" + for packet in packet_list: + if hasattr(packet, "load") and b"xxxxx" in packet.load: + return packet + return None + + @func_test + def test_qinq_forwarding(self) -> None: + """QinQ Rx filter test case. + + Steps: + Launch testpmd with mac forwarding mode. + Disable VLAN filter mode on port 0. + Send test packet and capture verbose output. + + Verify: + Check that the received packet has two separate VLAN layers in proper QinQ fashion. + Check that the received packet outer and inner VLAN layer has the appropriate ID. + """ + test_packet = ( + Ether(dst="ff:ff:ff:ff:ff:ff") + / Dot1AD(vlan=100) + / Dot1Q(vlan=200) + / IP(dst="1.2.3.4") + / UDP(dport=1234, sport=4321) + / Raw(load="xxxxx") + ) + with TestPmd() as testpmd: + testpmd.set_vlan_filter(0, False) + testpmd.start() + received_packets = send_packet_and_capture(test_packet) + packet = self._get_relevant_packet(received_packets) + + verify(packet is not None, "Packet was dropped when it should have been received.") + + if packet is not None: + verify( + bool(packet.haslayer(Dot1AD)) and bool(packet.haslayer(Dot1Q)), + "QinQ/VLAN layers not found in packet", + ) + + if outer_vlan := packet.getlayer(Dot1AD): + outer_vlan_id = outer_vlan.vlan + verify( + outer_vlan_id == 100, + f"Outer VLAN ID was {outer_vlan_id} when it should have been 100.", + ) + else: + verify(False, "VLAN layer not found in received packet.") + + if outer_vlan and (inner_vlan := outer_vlan.getlayer(Dot1Q)): + inner_vlan_id = inner_vlan.vlan + verify( + inner_vlan_id == 200, + f"Inner VLAN ID was {inner_vlan_id} when it should have been 200", + ) + + @requires_nic_capability(NicCapability.PORT_RX_OFFLOAD_QINQ_STRIP) + @func_test + def test_qinq_strip(self) -> None: + """Test combinations of VLAN/QinQ strip settings with various QinQ packets. + + Steps: + Launch testpmd with QinQ and VLAN strip enabled. + Send four VLAN/QinQ related test packets. + + Verify: + Check received packets have the expected VLAN/QinQ layers/tags. + """ + test_packets = [ + Ether() / Dot1Q() / IP() / UDP(dport=1234, sport=4321) / Raw(load="xxxxx"), + Ether() + / Dot1Q(vlan=100) + / Dot1Q(vlan=200) + / IP() + / UDP(dport=1234, sport=4321) + / Raw(load="xxxxx"), + Ether() / Dot1AD() / IP() / UDP(dport=1234, sport=4321) / Raw(load="xxxxx"), + Ether() / Dot1AD() / Dot1Q() / IP() / UDP(dport=1234, sport=4321) / Raw(load="xxxxx"), + ] + with TestPmd() as testpmd: + testpmd.set_qinq_strip(0, True) + testpmd.set_vlan_strip(0, True) + testpmd.start() + + received_packets1 = send_packet_and_capture(test_packets[0]) + vlan_packet = self._get_relevant_packet(received_packets1) + received_packets2 = send_packet_and_capture(test_packets[1]) + double_vlan_packet = self._get_relevant_packet(received_packets2) + received_packets3 = send_packet_and_capture(test_packets[2]) + single_88a8_packet = self._get_relevant_packet(received_packets3) + received_packets4 = send_packet_and_capture(test_packets[3]) + qinq_packet = self._get_relevant_packet(received_packets4) + + testpmd.stop() + + tests = [ + ("Single 8100 tag", self._strip_verify(vlan_packet, False, "Single 8100 tag")), + ( + "Double 8100 tag", + self._strip_verify(double_vlan_packet, True, "Double 8100 tag"), + ), + ( + "Single 88a8 tag", + self._strip_verify(single_88a8_packet, False, "Single 88a8 tag"), + ), + ( + "QinQ (88a8 and 8100 tags)", + self._strip_verify(qinq_packet, False, "QinQ (88a8 and 8100 tags)"), + ), + ] + + failed = [ctx for ctx, result in tests if not result] + + verify( + not failed, + f"The following packets were not stripped correctly: {', '.join(failed)}", + ) -- 2.51.0
