diff options
author | Oliver Hartkopp <socketcan@hartkopp.net> | 2013-08-26 15:05:36 +0200 |
---|---|---|
committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2013-08-29 22:58:24 +0200 |
commit | 391ac1282dd7ff1cb8245cccc5262e8e4173edc4 (patch) | |
tree | 891c2d57e8b2424b72e07815b7f203317257c93e /include/uapi/linux/can | |
parent | 1149108e2fbf98899447d4567901bf07825ee576 (diff) | |
download | op-kernel-dev-391ac1282dd7ff1cb8245cccc5262e8e4173edc4.zip op-kernel-dev-391ac1282dd7ff1cb8245cccc5262e8e4173edc4.tar.gz |
can: gw: add a per rule limitation of frame hops
Usually the received CAN frames can be processed/routed as much as 'max_hops'
times (which is given at module load time of the can-gw module).
Introduce a new configuration option to reduce the number of possible hops
for a specific gateway rule to a value smaller then max_hops.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'include/uapi/linux/can')
-rw-r--r-- | include/uapi/linux/can/gw.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/uapi/linux/can/gw.h b/include/uapi/linux/can/gw.h index ae07bec..4e27c82 100644 --- a/include/uapi/linux/can/gw.h +++ b/include/uapi/linux/can/gw.h @@ -45,6 +45,7 @@ enum { CGW_DST_IF, /* ifindex of destination network interface */ CGW_FILTER, /* specify struct can_filter on source CAN device */ CGW_DELETED, /* number of deleted CAN frames (see max_hops param) */ + CGW_LIM_HOPS, /* limit the number of hops of this specific rule */ __CGW_MAX }; @@ -116,13 +117,19 @@ enum { * Sets a CAN receive filter for the gateway job specified by the * struct can_filter described in include/linux/can.h * - * CGW_MOD_XXX (length 17 bytes): + * CGW_MOD_(AND|OR|XOR|SET) (length 17 bytes): * Specifies a modification that's done to a received CAN frame before it is * send out to the destination interface. * * <struct can_frame> data used as operator * <u8> affected CAN frame elements * + * CGW_LIM_HOPS (length 1 byte): + * Limit the number of hops of this specific rule. Usually the received CAN + * frame can be processed as much as 'max_hops' times (which is given at module + * load time of the can-gw module). This value is used to reduce the number of + * possible hops for this gateway rule to a value smaller then max_hops. + * * CGW_CS_XOR (length 4 bytes): * Set a simple XOR checksum starting with an initial value into * data[result-idx] using data[start-idx] .. data[end-idx] |