diff options
| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2013-01-17 18:43:41 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2013-01-26 16:59:01 +0100 |
| commit | d904d3edcbb26efc86ea3575bb4265559801a94b (patch) | |
| tree | 3589f467d029ea18c1740841ba5dd12323bc3b7a | |
| parent | 156c2bb9f88065c8da78814f98fde665a5cbb527 (diff) | |
can: gw: make routing to the incoming CAN interface configurable
Introduce new configuration flag CGW_FLAGS_CAN_IIF_TX_OK to configure if a
CAN sk_buff that has been routed with can-gw is allowed to be send back to
the originating CAN interface.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
| -rw-r--r-- | include/uapi/linux/can/gw.h | 1 | ||||
| -rw-r--r-- | net/can/gw.c | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/uapi/linux/can/gw.h b/include/uapi/linux/can/gw.h index 8e1db18c3cb..0505c7f8621 100644 --- a/include/uapi/linux/can/gw.h +++ b/include/uapi/linux/can/gw.h @@ -51,6 +51,7 @@ enum { #define CGW_FLAGS_CAN_ECHO 0x01 #define CGW_FLAGS_CAN_SRC_TSTAMP 0x02 +#define CGW_FLAGS_CAN_IIF_TX_OK 0x04 #define CGW_MOD_FUNCS 4 /* AND OR XOR SET */ diff --git a/net/can/gw.c b/net/can/gw.c index 574dda78eb0..37a3efb7cc9 100644 --- a/net/can/gw.c +++ b/net/can/gw.c @@ -52,6 +52,7 @@ #include <linux/skbuff.h> #include <linux/can.h> #include <linux/can/core.h> +#include <linux/can/skb.h> #include <linux/can/gw.h> #include <net/rtnetlink.h> #include <net/net_namespace.h> @@ -347,6 +348,13 @@ static void can_can_gw_rcv(struct sk_buff *skb, void *data) return; } + /* is sending the skb back to the incoming interface not allowed? */ + if (!(gwj->flags & CGW_FLAGS_CAN_IIF_TX_OK) && + skb_headroom(skb) == sizeof(struct can_skb_priv) && + (((struct can_skb_priv *)(skb->head))->ifindex == + gwj->dst.dev->ifindex)) + return; + /* * clone the given skb, which has not been done in can_rcv() * |