From 921ca574cd382142add8b12d0a7117f495510de5 Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp Date: Sun, 6 Dec 2020 15:47:31 +0100 Subject: can: isotp: add SF_BROADCAST support for functional addressing When CAN_ISOTP_SF_BROADCAST is set in the CAN_ISOTP_OPTS flags the CAN_ISOTP socket is switched into functional addressing mode, where only single frame (SF) protocol data units can be send on the specified CAN interface and the given tp.tx_id after bind(). In opposite to normal and extended addressing this socket does not register a CAN-ID for reception which would be needed for a 1-to-1 ISOTP connection with a segmented bi-directional data transfer. Sending SFs on this socket is therefore a TX-only 'broadcast' operation. Signed-off-by: Oliver Hartkopp Signed-off-by: Thomas Wagner Link: https://lore.kernel.org/r/20201206144731.4609-1-socketcan@hartkopp.net Signed-off-by: Marc Kleine-Budde --- include/uapi/linux/can/isotp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/uapi/linux/can/isotp.h b/include/uapi/linux/can/isotp.h index 7793b26aa154..c55935b64ccc 100644 --- a/include/uapi/linux/can/isotp.h +++ b/include/uapi/linux/can/isotp.h @@ -135,7 +135,7 @@ struct can_isotp_ll_options { #define CAN_ISOTP_FORCE_RXSTMIN 0x100 /* ignore CFs depending on rx stmin */ #define CAN_ISOTP_RX_EXT_ADDR 0x200 /* different rx extended addressing */ #define CAN_ISOTP_WAIT_TX_DONE 0x400 /* wait for tx completion */ - +#define CAN_ISOTP_SF_BROADCAST 0x800 /* 1-to-N functional addressing */ /* default values */ -- cgit v1.2.3-59-g8ed1b