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| author | Oliver Hartkopp <oliver@hartkopp.net> | 2010-01-12 02:00:46 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-12 02:00:46 -0800 |
| commit | 3ccd4c6167d3b39d52631767ebbf8b5677c5855d (patch) | |
| tree | bfcb801edebd00e8b30e897038bad7fee39625cc /drivers/net/can/vcan.c | |
| parent | d218d11133d888f9745802146a50255a4781d37a (diff) | |
| download | linux-3ccd4c6167d3b39d52631767ebbf8b5677c5855d.tar.gz linux-3ccd4c6167d3b39d52631767ebbf8b5677c5855d.tar.bz2 linux-3ccd4c6167d3b39d52631767ebbf8b5677c5855d.zip | |
can: Unify droping of invalid tx skbs and netdev stats
To prevent the CAN drivers to operate on invalid socketbuffers the skbs are
now checked and silently dropped at the xmit-function consistently.
Also the netdev stats are consistently using the CAN data length code (dlc)
for [rx|tx]_bytes now.
Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/can/vcan.c')
| -rw-r--r-- | drivers/net/can/vcan.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c index 80ac56313981..d124d837ae58 100644 --- a/drivers/net/can/vcan.c +++ b/drivers/net/can/vcan.c @@ -47,6 +47,7 @@ #include <linux/if_arp.h> #include <linux/if_ether.h> #include <linux/can.h> +#include <linux/can/dev.h> #include <net/rtnetlink.h> static __initdata const char banner[] = @@ -70,10 +71,11 @@ MODULE_PARM_DESC(echo, "Echo sent frames (for testing). Default: 0 (Off)"); static void vcan_rx(struct sk_buff *skb, struct net_device *dev) { + struct can_frame *cf = (struct can_frame *)skb->data; struct net_device_stats *stats = &dev->stats; stats->rx_packets++; - stats->rx_bytes += skb->len; + stats->rx_bytes += cf->can_dlc; skb->protocol = htons(ETH_P_CAN); skb->pkt_type = PACKET_BROADCAST; @@ -85,11 +87,15 @@ static void vcan_rx(struct sk_buff *skb, struct net_device *dev) static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) { + struct can_frame *cf = (struct can_frame *)skb->data; struct net_device_stats *stats = &dev->stats; int loop; + if (can_dropped_invalid_skb(dev, skb)) + return NETDEV_TX_OK; + stats->tx_packets++; - stats->tx_bytes += skb->len; + stats->tx_bytes += cf->can_dlc; /* set flag whether this packet has to be looped back */ loop = skb->pkt_type == PACKET_LOOPBACK; @@ -103,7 +109,7 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) * CAN core already did the echo for us */ stats->rx_packets++; - stats->rx_bytes += skb->len; + stats->rx_bytes += cf->can_dlc; } kfree_skb(skb); return NETDEV_TX_OK; |