| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __LINUX_BRIDGE_NETFILTER_H |
| 3 | #define __LINUX_BRIDGE_NETFILTER_H |
| 4 | |
| 5 | #include <uapi/linux/netfilter_bridge.h> |
| 6 | #include <linux/skbuff.h> |
| 7 | |
| 8 | struct nf_bridge_frag_data { |
| 9 | char mac[ETH_HLEN]; |
| 10 | bool vlan_present; |
| 11 | u16 vlan_tci; |
| 12 | __be16 vlan_proto; |
| 13 | }; |
| 14 | |
| 15 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
| 16 | |
| 17 | int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
| 18 | |
| 19 | static inline void br_drop_fake_rtable(struct sk_buff *skb) |
| 20 | { |
| 21 | struct dst_entry *dst = skb_dst(skb); |
| 22 | |
| 23 | if (dst && (dst->flags & DST_FAKE_RTABLE)) |
| 24 | skb_dst_drop(skb); |
| 25 | } |
| 26 | |
| 27 | static inline struct nf_bridge_info * |
| 28 | nf_bridge_info_get(const struct sk_buff *skb) |
| 29 | { |
| 30 | return skb_ext_find(skb, SKB_EXT_BRIDGE_NF); |
| 31 | } |
| 32 | |
| 33 | static inline bool nf_bridge_info_exists(const struct sk_buff *skb) |
| 34 | { |
| 35 | return skb_ext_exist(skb, SKB_EXT_BRIDGE_NF); |
| 36 | } |
| 37 | |
| 38 | static inline int nf_bridge_get_physinif(const struct sk_buff *skb) |
| 39 | { |
| 40 | const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb); |
| 41 | |
| 42 | if (!nf_bridge) |
| 43 | return 0; |
| 44 | |
| 45 | return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0; |
| 46 | } |
| 47 | |
| 48 | static inline int nf_bridge_get_physoutif(const struct sk_buff *skb) |
| 49 | { |
| 50 | const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb); |
| 51 | |
| 52 | if (!nf_bridge) |
| 53 | return 0; |
| 54 | |
| 55 | return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0; |
| 56 | } |
| 57 | |
| 58 | static inline struct net_device * |
| 59 | nf_bridge_get_physindev(const struct sk_buff *skb) |
| 60 | { |
| 61 | const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb); |
| 62 | |
| 63 | return nf_bridge ? nf_bridge->physindev : NULL; |
| 64 | } |
| 65 | |
| 66 | static inline struct net_device * |
| 67 | nf_bridge_get_physoutdev(const struct sk_buff *skb) |
| 68 | { |
| 69 | const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb); |
| 70 | |
| 71 | return nf_bridge ? nf_bridge->physoutdev : NULL; |
| 72 | } |
| 73 | |
| 74 | static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb) |
| 75 | { |
| 76 | const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb); |
| 77 | |
| 78 | return nf_bridge && nf_bridge->in_prerouting; |
| 79 | } |
| 80 | #else |
| 81 | #define br_drop_fake_rtable(skb) do { } while (0) |
| 82 | static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb) |
| 83 | { |
| 84 | return false; |
| 85 | } |
| 86 | #endif /* CONFIG_BRIDGE_NETFILTER */ |
| 87 | |
| 88 | #endif |