can: j1939: fix support for multipacket broadcast message
authorZhang Changzhong <zhangchangzhong@huawei.com>
Wed, 5 Aug 2020 03:50:22 +0000 (11:50 +0800)
committerMarc Kleine-Budde <mkl@pengutronix.de>
Sat, 15 Aug 2020 09:12:57 +0000 (11:12 +0200)
commitf4fd77fd87e9b214c26bb2ebd4f90055eaea5ade
tree4e2f4ef9e4d0a0fdf4e7a29c2e87fa6dd8c23a3c
parent4ca0d9ac3fd8f9f90b72a15d8da2aca3ffb58418
can: j1939: fix support for multipacket broadcast message

Currently j1939_tp_im_involved_anydir() in j1939_tp_recv() check the previously
set flags J1939_ECU_LOCAL_DST and J1939_ECU_LOCAL_SRC of incoming skb, thus
multipacket broadcast message was aborted by receive side because it may come
from remote ECUs and have no exact dst address. Similarly, j1939_tp_cmd_recv()
and j1939_xtp_rx_dat() didn't process broadcast message.

So fix it by checking and process broadcast message in j1939_tp_recv(),
j1939_tp_cmd_recv() and j1939_xtp_rx_dat().

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1596599425-5534-2-git-send-email-zhangchangzhong@huawei.com
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
net/can/j1939/transport.c