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Use scapy to generate Ethernet packet in multi-device test

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Test: atest CtsConnectivityMultiDevicesTestCases:ApfV4Test
Change-Id: I28d8a2f54878bda47d0073bea6ee4931c091dcf1
This commit is contained in:
Jimi Chen 2025-03-21 01:36:18 +00:00
commit 237a2d5843
1 changed files with 11 additions and 11 deletions
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22
tests/cts/multidevices/apfv4_test.py
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@ -15,10 +15,12 @@
from absl.testing import parameterized
from mobly import asserts
from net_tests_utils.host.python import apf_test_base, apf_utils
from scapy.layers.l2 import Ether
# Constants.
COUNTER_DROPPED_ETHERTYPE_NOT_ALLOWED = "DROPPED_ETHERTYPE_NOT_ALLOWED"
ETHER_BROADCAST_ADDR = "FFFFFFFFFFFF"
MIN_PACKET_SIZE = 60
class ApfV4Test(apf_test_base.ApfTestBase, parameterized.TestCase):
@ -45,20 +47,18 @@ class ApfV4Test(apf_test_base.ApfTestBase, parameterized.TestCase):
# Tests can use any disallowed packet type. Currently,
# several ethertypes from the legacy ApfFilter denylist are used.
@parameterized.parameters(
"88a2", # ATA over Ethernet
"88a4", # EtherCAT
"88b8", # GOOSE (Generic Object Oriented Substation event)
"88cd", # SERCOS III
"88e3", # Media Redundancy Protocol (IEC62439-2)
0x88a2, # ATA over Ethernet
0x88a4, # EtherCAT
0x88b8, # GOOSE (Generic Object Oriented Substation event)
0x88cd, # SERCOS III
0x88e3, # Media Redundancy Protocol (IEC62439-2)
) # Declare inputs for state_str and expected_result.
def test_apf_drop_ethertype_not_allowed(self, blocked_ether_type):
# Ethernet header (14 bytes).
packet = self.client_mac_address.replace(":", "") # Destination MAC
packet += self.server_mac_address.replace(":", "") # Source MAC
packet += blocked_ether_type
eth = Ether(src=self.server_mac_address, dst=self.client_mac_address, type=blocked_ether_type)
packet = bytes(eth).hex()
# Pad with zeroes to minimum ethernet frame length.
packet += "00" * 46
# Add zero padding up to minimum ethernet frame length
packet = packet.ljust(MIN_PACKET_SIZE * 2, "0")
self.send_packet_and_expect_counter_increased(
packet, COUNTER_DROPPED_ETHERTYPE_NOT_ALLOWED
)