1 #ifndef __LINUX_BRIDGE_NETFILTER_H
2 #define __LINUX_BRIDGE_NETFILTER_H
4 /* bridge-specific defines for netfilter.
7 #include <linux/netfilter.h>
8 #if defined(__KERNEL__) && defined(CONFIG_BRIDGE_NETFILTER)
9 #include <linux/if_ether.h>
13 /* After promisc drops, checksum checks. */
14 #define NF_BR_PRE_ROUTING 0
15 /* If the packet is destined for this box. */
16 #define NF_BR_LOCAL_IN 1
17 /* If the packet is destined for another interface. */
18 #define NF_BR_FORWARD 2
19 /* Packets coming from a local process. */
20 #define NF_BR_LOCAL_OUT 3
21 /* Packets about to hit the wire. */
22 #define NF_BR_POST_ROUTING 4
23 /* Not really a hook, but used for the ebtables broute table */
24 #define NF_BR_BROUTING 5
25 #define NF_BR_NUMHOOKS 6
29 enum nf_br_hook_priorities
{
30 NF_BR_PRI_FIRST
= INT_MIN
,
31 NF_BR_PRI_NAT_DST_BRIDGED
= -300,
32 NF_BR_PRI_FILTER_BRIDGED
= -200,
34 NF_BR_PRI_NAT_DST_OTHER
= 100,
35 NF_BR_PRI_FILTER_OTHER
= 200,
36 NF_BR_PRI_NAT_SRC
= 300,
37 NF_BR_PRI_LAST
= INT_MAX
,
40 #ifdef CONFIG_BRIDGE_NETFILTER
42 #define BRNF_PKT_TYPE 0x01
43 #define BRNF_BRIDGED_DNAT 0x02
44 #define BRNF_DONT_TAKE_PARENT 0x04
45 #define BRNF_BRIDGED 0x08
46 #define BRNF_NF_BRIDGE_PREROUTING 0x10
49 /* Only used in br_forward.c */
51 void nf_bridge_maybe_copy_header(struct sk_buff
*skb
)
54 if (skb
->protocol
== __constant_htons(ETH_P_8021Q
)) {
55 memcpy(skb
->data
- 18, skb
->nf_bridge
->data
, 18);
58 memcpy(skb
->data
- 16, skb
->nf_bridge
->data
, 16);
62 /* This is called by the IP fragmenting code and it ensures there is
63 * enough room for the encapsulating header (if there is one). */
65 int nf_bridge_pad(struct sk_buff
*skb
)
67 if (skb
->protocol
== __constant_htons(ETH_P_IP
))
70 if (skb
->protocol
== __constant_htons(ETH_P_8021Q
))
76 struct bridge_skb_cb
{
82 extern int brnf_deferred_hooks
;
83 #endif /* CONFIG_BRIDGE_NETFILTER */
85 #endif /* __KERNEL__ */