Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
7enum 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#define BRNF_BRIDGED_DNAT 0x02
21#define BRNF_NF_BRIDGE_PREROUTING 0x08
22
23static inline unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb)
24{
25 if (skb->nf_bridge->orig_proto == BRNF_PROTO_PPPOE)
26 return PPPOE_SES_HLEN;
27 return 0;
28}
29
30int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb);
31
32static inline void br_drop_fake_rtable(struct sk_buff *skb)
33{
34 struct dst_entry *dst = skb_dst(skb);
35
36 if (dst && (dst->flags & DST_FAKE_RTABLE))
37 skb_dst_drop(skb);
38}
39
40static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
41{
42 struct nf_bridge_info *nf_bridge;
43
44 if (skb->nf_bridge == NULL)
45 return 0;
46
47 nf_bridge = skb->nf_bridge;
48 return nf_bridge->physindev ? nf_bridge->physindev->ifindex : 0;
49}
50
51static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
52{
53 struct nf_bridge_info *nf_bridge;
54
55 if (skb->nf_bridge == NULL)
56 return 0;
57
58 nf_bridge = skb->nf_bridge;
59 return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
60}
61
62static inline struct net_device *
63nf_bridge_get_physindev(const struct sk_buff *skb)
64{
65 return skb->nf_bridge ? skb->nf_bridge->physindev : NULL;
66}
67
68static inline struct net_device *
69nf_bridge_get_physoutdev(const struct sk_buff *skb)
70{
71 return skb->nf_bridge ? skb->nf_bridge->physoutdev : NULL;
72}
73#else
74#define br_drop_fake_rtable(skb) do { } while (0)
75#endif /* CONFIG_BRIDGE_NETFILTER */
76
77#endif