mac_filter Test Suite

Mac address filtering test suite.

This test suite ensures proper and expected behavior of Allowlist filtering via mac addresses on devices bound to the Poll Mode Driver. If a packet received on a device contains a mac address not contained within its mac address pool, the packet should be dropped. Alternatively, if a packet is received that contains a destination mac within the devices address pool, the packet should be accepted and forwarded. This behavior should remain consistent across all packets, namely those containing dot1q tags or otherwise.

The following test suite assesses behaviors based on the aforementioned logic. Additionally, testing is done within the PMD itself to ensure that the mac address allow list is behaving as expected.

class TestMacFilter

Bases: TestSuite

Mac address allowlist filtering test suite.

Configure mac address filtering on a given port, and test the port’s filtering behavior using both a given port’s hardware address as well as dummy addresses. If a port accepts a packet that is not contained within its mac address allowlist, then a given test case fails. Alternatively, if a port drops a packet that is designated within its mac address allowlist, a given test case will fail.

Moreover, a given port should demonstrate proper behavior when bound to the Poll Mode Driver. A port should not have a mac address allowlist that exceeds its designated size. A port’s default hardware address should not be removed from its address pool, and invalid addresses should not be included in the allowlist. If a port abides by the above rules, the test case passes.

send_packet_and_verify(mac_address: str, should_receive: bool = True) → None

Generate, send, and verify a packet based on specified parameters.

Test cases within this suite utilize this method to create, send, and verify packets based on criteria relating to the packet’s destination mac address, and vlan tag. Packets are verified using an inserted payload. Assuming the test case expects to receive a specified packet, if the list of received packets contains this payload within any of its packets, the test case passes. Alternatively, if the designed packet should not be received, and the packet payload is received, then the test case fails. Each call with this method sends exactly one packet.

Parameters:

  • mac_address (str) – The destination mac address of the packet being sent.

  • add_vlan – If :data:’True’, add a vlan tag to the packet being sent. The vlan tag will be :data:’2’ if the packet should be received and :data:’1’ if the packet should not be received but requires a vlan tag.

  • should_receive (bool) – If :data:’True’, assert whether or not the sent packet has been received. If :data:’False’, assert that the send packet was not received. :data:’True’ by default

test_add_remove_mac_addresses() → None

Assess basic mac addressing filtering functionalities.

This test case validates for proper behavior of mac address filtering with both a port’s default, burned-in mac address, as well as additional mac addresses added to the PMD. Packets should either be received or not received depending on the properties applied to the PMD at any given time.

Test:

  • Start TestPMD without promiscuous mode.

  • Send a packet with the port’s default mac address. (Should receive)

  • Send a packet with fake mac address. (Should not receive)

  • Add fake mac address to the PMD’s address pool.

  • Send a packet with the fake mac address to the PMD. (Should receive)

  • Remove the fake mac address from the PMD’s address pool.

  • Send a packet with the fake mac address to the PMD. (Should not receive)

test_invalid_address() → None

Assess the behavior of a NIC mac address pool while bound to the PMD.

An assessment of a NIC’s behavior when mounted to a PMD as it relates to mac addresses and address pooling. Devices should not be able to use invalid mac addresses, remove their built-in hardware address, or exceed their address pools.

Test:

  • Start TestPMD.

  • Attempt to add an invalid mac address. (Should fail)

  • Attempt to remove the device’s hardware address with no additional addresses in the address pool. (Should fail)

  • Add a fake mac address to the pool twice in succession. (Should not create any errors)

  • Attempt to remove the device’s hardware address with other addresses in the address pool. (Should fail)

  • Determine the device’s mac address pool size, and fill the pool with fake addresses.

  • Attempt to add another fake mac address, overloading the address pool. (Should fail)

test_multicast_filter() → None

Assess basic multicast address filtering functionalities.

Ensure that multicast filtering performs as intended when a given device is bound to the PMD.

Test:

  • Start TestPMD without promiscuous mode.

  • Add a fake multicast address to the PMD’s multicast address pool.

  • Send a packet with the fake multicast address to the PMD. (Should receive)

  • Remove the fake multicast address from the PMDs multicast address filter.

  • Send a packet with the fake multicast address to the PMD. (Should not receive)