From 9ca5abc9a53b0932a43a54907d8ea949ae26b2b9 Mon Sep 17 00:00:00 2001
From: Reinier van der Walle <walle@astron.nl>
Date: Tue, 23 Jul 2024 10:59:11 +0200
Subject: [PATCH] WIP: added eth_200g IP
---
.../cocotb/tb_rdma_packetiser.py | 32 +++++++++++--------
1 file changed, 18 insertions(+), 14 deletions(-)
diff --git a/applications/rdma_demo/libraries/rdma_packetiser/cocotb/tb_rdma_packetiser.py b/applications/rdma_demo/libraries/rdma_packetiser/cocotb/tb_rdma_packetiser.py
index 95cf9c4124..09b3e7a1ae 100644
--- a/applications/rdma_demo/libraries/rdma_packetiser/cocotb/tb_rdma_packetiser.py
+++ b/applications/rdma_demo/libraries/rdma_packetiser/cocotb/tb_rdma_packetiser.py
@@ -318,21 +318,25 @@ async def tb_rdma_packetiser(dut):
dut._log.debug("src_out data = \n%s", hexdump(data))
# Verify icrc
+ icrc = int.from_bytes(packet[-4:], "big")
+
# calculation of icrc is done as in:
# https://github.com/secdev/scapy/blob/master/scapy/contrib/roce.py
- # ICRC could be calculated using the scapy library (if installed) with the code below.
- # from scapy.layers.l2 import Ether
- # from scapy.contrib.roce import BTH # for compute_icrc function
- # exp_icrc = int.from_bytes(Ether(packet)['BTH'].compute_icrc(None), 'little')
- icrc = int.from_bytes(packet[-4:], "big")
- ones = (0xFF).to_bytes(1, 'little')
- pseudo_packet = ([ones] * 8 + [packet[14:15]] +
- [ones] + [packet[16:22]] + [ones] +
- [packet[23:24]] + [ones] * 2 +
- [packet[26:40]] + [ones] * 2 +
- [packet[42:46]] + [ones] + [packet[47:-4]]
- )
- pseudo_packet = b''.join(pseudo_packet)
- exp_icrc = crc32(pseudo_packet) & 0xffffffff
+ # ICRC could be calculated using the scapy library (if installed) with the code below.
+ try:
+ from scapy.layers.l2 import Ether
+ from scapy.contrib.roce import BTH # for compute_icrc function
+ Ether(packet).show() # print packet if scapy is installed.
+ exp_icrc = int.from_bytes(Ether(packet)['BTH'].compute_icrc(None), 'little')
+ except ModuleNotFoundError:
+ ones = (0xFF).to_bytes(1, 'little')
+ pseudo_packet = ([ones] * 8 + [packet[14:15]] +
+ [ones] + [packet[16:22]] + [ones] +
+ [packet[23:24]] + [ones] * 2 +
+ [packet[26:40]] + [ones] * 2 +
+ [packet[42:46]] + [ones] + [packet[47:-4]]
+ )
+ pseudo_packet = b''.join(pseudo_packet)
+ exp_icrc = crc32(pseudo_packet) & 0xffffffff
assert exp_icrc == icrc, (
f'ERROR: Wrong ICRC, expected = {hex(exp_icrc)}, actual = {hex(icrc)}')
--
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