diff options
Diffstat (limited to 'include/linux/netfilter_bridge.h')
| -rw-r--r-- | include/linux/netfilter_bridge.h | 42 |
1 files changed, 12 insertions, 30 deletions
diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h index 427c67ff89e98..9a4dd11af86ec 100644 --- a/include/linux/netfilter_bridge.h +++ b/include/linux/netfilter_bridge.h @@ -5,9 +5,8 @@ */ #include <linux/netfilter.h> -#if defined(__KERNEL__) && defined(CONFIG_BRIDGE_NETFILTER) #include <linux/if_ether.h> -#endif +#include <linux/if_vlan.h> /* Bridge Hooks */ /* After promisc drops, checksum checks. */ @@ -47,40 +46,20 @@ enum nf_br_hook_priorities { /* Only used in br_forward.c */ -static inline -int nf_bridge_maybe_copy_header(struct sk_buff *skb) +extern int nf_bridge_copy_header(struct sk_buff *skb); +static inline int nf_bridge_maybe_copy_header(struct sk_buff *skb) { - int err; - - if (skb->nf_bridge) { - if (skb->protocol == __constant_htons(ETH_P_8021Q)) { - err = skb_cow(skb, 18); - if (err) - return err; - memcpy(skb->data - 18, skb->nf_bridge->data, 18); - skb_push(skb, 4); - } else { - err = skb_cow(skb, 16); - if (err) - return err; - memcpy(skb->data - 16, skb->nf_bridge->data, 16); - } - } - return 0; + if (skb->nf_bridge) + return nf_bridge_copy_header(skb); + return 0; } /* This is called by the IP fragmenting code and it ensures there is * enough room for the encapsulating header (if there is one). */ -static inline -int nf_bridge_pad(struct sk_buff *skb) +static inline int nf_bridge_pad(const struct sk_buff *skb) { - if (skb->protocol == __constant_htons(ETH_P_IP)) - return 0; - if (skb->nf_bridge) { - if (skb->protocol == __constant_htons(ETH_P_8021Q)) - return 4; - } - return 0; + return (skb->nf_bridge && skb->protocol == htons(ETH_P_8021Q)) + ? VLAN_HLEN : 0; } struct bridge_skb_cb { @@ -90,6 +69,9 @@ struct bridge_skb_cb { }; extern int brnf_deferred_hooks; +#else +#define nf_bridge_maybe_copy_header(skb) (0) +#define nf_bridge_pad(skb) (0) #endif /* CONFIG_BRIDGE_NETFILTER */ #endif /* __KERNEL__ */ |