include/linux/netfilter_bridge.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __LINUX_BRIDGE_NETFILTER_H
0003 #define __LINUX_BRIDGE_NETFILTER_H
0004
0005 #include <uapi/linux/netfilter_bridge.h>
0006 #include <linux/skbuff.h>
0007
0008 struct nf_bridge_frag_data {
0009     char    mac[ETH_HLEN];
0010     bool    vlan_present;
0011     u16     vlan_tci;
0012     __be16  vlan_proto;
0013 };
0014
0015 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
0016
0017 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
0018
0019 static inline void br_drop_fake_rtable(struct sk_buff *skb)
0020 {
0021     struct dst_entry *dst = skb_dst(skb);
0022
0023     if (dst && (dst->flags & DST_FAKE_RTABLE))
0024         skb_dst_drop(skb);
0025 }
0026
0027 static inline struct nf_bridge_info *
0028 nf_bridge_info_get(const struct sk_buff *skb)
0029 {
0030     return skb_ext_find(skb, SKB_EXT_BRIDGE_NF);
0031 }
0032
0033 static inline bool nf_bridge_info_exists(const struct sk_buff *skb)
0034 {
0035     return skb_ext_exist(skb, SKB_EXT_BRIDGE_NF);
0036 }
0037
0038 static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
0039 {
0040     const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
0041
0042     if (!nf_bridge)
0043         return 0;
0044
0045     return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0;
0046 }
0047
0048 static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
0049 {
0050     const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
0051
0052     if (!nf_bridge)
0053         return 0;
0054
0055     return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
0056 }
0057
0058 static inline struct net_device *
0059 nf_bridge_get_physindev(const struct sk_buff *skb)
0060 {
0061     const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
0062
0063     return nf_bridge ? nf_bridge->physindev : NULL;
0064 }
0065
0066 static inline struct net_device *
0067 nf_bridge_get_physoutdev(const struct sk_buff *skb)
0068 {
0069     const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
0070
0071     return nf_bridge ? nf_bridge->physoutdev : NULL;
0072 }
0073
0074 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
0075 {
0076     const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
0077
0078     return nf_bridge && nf_bridge->in_prerouting;
0079 }
0080 #else
0081 #define br_drop_fake_rtable(skb)            do { } while (0)
0082 static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
0083 {
0084     return false;
0085 }
0086 #endif /* CONFIG_BRIDGE_NETFILTER */
0087
0088 #endif