[LTP] [PATCH 0/2] pty: use correct protocol in pty04 based on line discipline

[Vasileios Almpanis]

Hi,

during testing of the LTP pty test pty04, we observed intermittent
failures caused by unexpected IPv6 packets being received.

The test currently filters packets using ETH_P_ALL. As a result,
packets with protocols other than the expected one (e.g. IPv6) may be
received, leading to data corruption reports such as:

TFAIL: Corrupt data (max 64 of 8191 bytes shown): data[0..64] =
TFAIL: 60 00 00 00 00 24 00 01 00 00 00 00 00 00 00 00
TFAIL: 00 00 00 00 00 00 00 00 ff 02 00 00 00 00 00 00
TFAIL: 00 00 00 00 00 00 00 16 3a 00 05 02 00 00 01 00
TFAIL: 8f 00 6e 8a 00 00 00 01 04 00 00 00 ff 02 00 00

This patch series addresses the issue by selecting the protocol based
on the configured line discipline.

Patch 1 adds a compatibility definition for ETH_P_CAN to the LAPI
headers. Patch 2 updates pty04 to choose the appropriate protocol,
avoiding reception of unrelated packets.

Signed-off-by: Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>

Vasileios Almpanis (2):
  add ETH_P_CAN compat macro to LAPI headers
  pty04: use the correct protocol per line discipline to avoid extra
    packets

 include/lapi/if_ether.h      |  4 ++++
 testcases/kernel/pty/pty04.c | 15 ++++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

-- 
2.43.0