diff options
| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2022-09-12 20:07:19 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-09-15 10:08:08 +0300 |
| commit | 96a7457a14d9cf98cf58de1e26c03180e0f28141 (patch) | |
| tree | 76f566fef2733a820118b89fe7a7dbd504644903 /net/can/j1939 | |
| parent | 1c679f917397f85bda93f7f9b20fb722d4b8b18d (diff) | |
| download | linux-96a7457a14d9cf98cf58de1e26c03180e0f28141.tar.xz | |
can: skb: unify skb CAN frame identification helpers
Replace open coded checks for sk_buffs containing Classical CAN and
CAN FD frame structures as a preparation for CAN XL support.
With the added length check the unintended processing of CAN XL frames
having the CANXL_XLF bit set can be suppressed even when the skb->len
fits to non CAN XL frames.
The CAN_RAW socket needs a rework to use these helpers. Therefore the
use of these helpers is postponed to the CAN_RAW CAN XL integration.
The J1939 protocol gets a check for Classical CAN frames too.
Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/all/20220912170725.120748-2-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can/j1939')
| -rw-r--r-- | net/can/j1939/main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/can/j1939/main.c b/net/can/j1939/main.c index 8452b0fbb78c..144c86b0e3ff 100644 --- a/net/can/j1939/main.c +++ b/net/can/j1939/main.c @@ -42,6 +42,10 @@ static void j1939_can_recv(struct sk_buff *iskb, void *data) struct j1939_sk_buff_cb *skcb, *iskcb; struct can_frame *cf; + /* make sure we only get Classical CAN frames */ + if (!can_is_can_skb(iskb)) + return; + /* create a copy of the skb * j1939 only delivers the real data bytes, * the header goes into sockaddr. |