| 1 | #ifndef __LINUX_BRIDGE_NETFILTER_H |
| 2 | #define __LINUX_BRIDGE_NETFILTER_H |
| 3 | |
| 4 | #include <uapi/linux/netfilter_bridge.h> |
| 5 | #include <linux/skbuff.h> |
| 6 | |
| 7 | enum nf_br_hook_priorities { |
| 8 | NF_BR_PRI_FIRST = INT_MIN, |
| 9 | NF_BR_PRI_NAT_DST_BRIDGED = -300, |
| 10 | NF_BR_PRI_FILTER_BRIDGED = -200, |
| 11 | NF_BR_PRI_BRNF = 0, |
| 12 | NF_BR_PRI_NAT_DST_OTHER = 100, |
| 13 | NF_BR_PRI_FILTER_OTHER = 200, |
| 14 | NF_BR_PRI_NAT_SRC = 300, |
| 15 | NF_BR_PRI_LAST = INT_MAX, |
| 16 | }; |
| 17 | |
| 18 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
| 19 | |
| 20 | int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
| 21 | |
| 22 | static inline void br_drop_fake_rtable(struct sk_buff *skb) |
| 23 | { |
| 24 | struct dst_entry *dst = skb_dst(skb); |
| 25 | |
| 26 | if (dst && (dst->flags & DST_FAKE_RTABLE)) |
| 27 | skb_dst_drop(skb); |
| 28 | } |
| 29 | |
| 30 | static inline int nf_bridge_get_physinif(const struct sk_buff *skb) |
| 31 | { |
| 32 | struct nf_bridge_info *nf_bridge; |
| 33 | |
| 34 | if (skb->nf_bridge == NULL) |
| 35 | return 0; |
| 36 | |
| 37 | nf_bridge = skb->nf_bridge; |
| 38 | return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0; |
| 39 | } |
| 40 | |
| 41 | static inline int nf_bridge_get_physoutif(const struct sk_buff *skb) |
| 42 | { |
| 43 | struct nf_bridge_info *nf_bridge; |
| 44 | |
| 45 | if (skb->nf_bridge == NULL) |
| 46 | return 0; |
| 47 | |
| 48 | nf_bridge = skb->nf_bridge; |
| 49 | return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0; |
| 50 | } |
| 51 | |
| 52 | static inline struct net_device * |
| 53 | nf_bridge_get_physindev(const struct sk_buff *skb) |
| 54 | { |
| 55 | return skb->nf_bridge ? skb->nf_bridge->physindev : NULL; |
| 56 | } |
| 57 | |
| 58 | static inline struct net_device * |
| 59 | nf_bridge_get_physoutdev(const struct sk_buff *skb) |
| 60 | { |
| 61 | return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL; |
| 62 | } |
| 63 | |
| 64 | static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb) |
| 65 | { |
| 66 | return skb->nf_bridge && skb->nf_bridge->in_prerouting; |
| 67 | } |
| 68 | #else |
| 69 | #define br_drop_fake_rtable(skb) do { } while (0) |
| 70 | static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb) |
| 71 | { |
| 72 | return false; |
| 73 | } |
| 74 | #endif /* CONFIG_BRIDGE_NETFILTER */ |
| 75 | |
| 76 | #endif |