diff options
Diffstat (limited to 'include/linux/netfilter_bridge.h')
-rw-r--r-- | include/linux/netfilter_bridge.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h new file mode 100644 index 000000000..f2fdb5a52 --- /dev/null +++ b/include/linux/netfilter_bridge.h @@ -0,0 +1,77 @@ +#ifndef __LINUX_BRIDGE_NETFILTER_H +#define __LINUX_BRIDGE_NETFILTER_H + +#include <uapi/linux/netfilter_bridge.h> +#include <linux/skbuff.h> + +enum nf_br_hook_priorities { + NF_BR_PRI_FIRST = INT_MIN, + NF_BR_PRI_NAT_DST_BRIDGED = -300, + NF_BR_PRI_FILTER_BRIDGED = -200, + NF_BR_PRI_BRNF = 0, + NF_BR_PRI_NAT_DST_OTHER = 100, + NF_BR_PRI_FILTER_OTHER = 200, + NF_BR_PRI_NAT_SRC = 300, + NF_BR_PRI_LAST = INT_MAX, +}; + +#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) + +#define BRNF_BRIDGED_DNAT 0x02 +#define BRNF_NF_BRIDGE_PREROUTING 0x08 + +static inline unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb) +{ + if (skb->nf_bridge->orig_proto == BRNF_PROTO_PPPOE) + return PPPOE_SES_HLEN; + return 0; +} + +int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb); + +static inline void br_drop_fake_rtable(struct sk_buff *skb) +{ + struct dst_entry *dst = skb_dst(skb); + + if (dst && (dst->flags & DST_FAKE_RTABLE)) + skb_dst_drop(skb); +} + +static inline int nf_bridge_get_physinif(const struct sk_buff *skb) +{ + struct nf_bridge_info *nf_bridge; + + if (skb->nf_bridge == NULL) + return 0; + + nf_bridge = skb->nf_bridge; + return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0; +} + +static inline int nf_bridge_get_physoutif(const struct sk_buff *skb) +{ + struct nf_bridge_info *nf_bridge; + + if (skb->nf_bridge == NULL) + return 0; + + nf_bridge = skb->nf_bridge; + return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0; +} + +static inline struct net_device * +nf_bridge_get_physindev(const struct sk_buff *skb) +{ + return skb->nf_bridge ? skb->nf_bridge->physindev : NULL; +} + +static inline struct net_device * +nf_bridge_get_physoutdev(const struct sk_buff *skb) +{ + return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL; +} +#else +#define br_drop_fake_rtable(skb) do { } while (0) +#endif /* CONFIG_BRIDGE_NETFILTER */ + +#endif |