1 #ifndef __LINUX_BRIDGE_NETFILTER_H
2 #define __LINUX_BRIDGE_NETFILTER_H
4 /* bridge-specific defines for netfilter.
7 #include <linux/netfilter.h>
8 #include <linux/if_ether.h>
9 #include <linux/if_vlan.h>
10 #include <linux/if_pppox.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_BRIDGED 0x04
45 #define BRNF_NF_BRIDGE_PREROUTING 0x08
48 /* Only used in br_forward.c */
49 extern int nf_bridge_copy_header(struct sk_buff *skb);
50 static inline int nf_bridge_maybe_copy_header(struct sk_buff *skb)
53 skb->nf_bridge->mask & (BRNF_BRIDGED | BRNF_BRIDGED_DNAT))
54 return nf_bridge_copy_header(skb);
58 static inline unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
60 switch (skb->protocol) {
61 case __cpu_to_be16(ETH_P_8021Q):
63 case __cpu_to_be16(ETH_P_PPP_SES):
64 return PPPOE_SES_HLEN;
70 extern int br_handle_frame_finish(struct sk_buff *skb);
71 /* Only used in br_device.c */
72 static inline int br_nf_pre_routing_finish_bridge_slow(struct sk_buff *skb)
74 struct nf_bridge_info *nf_bridge = skb->nf_bridge;
76 skb_pull(skb, ETH_HLEN);
77 nf_bridge->mask ^= BRNF_BRIDGED_DNAT;
78 skb->dev = nf_bridge->physindev;
79 return br_handle_frame_finish(skb);
82 /* This is called by the IP fragmenting code and it ensures there is
83 * enough room for the encapsulating header (if there is one). */
84 static inline unsigned int nf_bridge_pad(const struct sk_buff *skb)
87 return nf_bridge_encap_header_len(skb);
91 struct bridge_skb_cb {
98 #define nf_bridge_maybe_copy_header(skb) (0)
99 #define nf_bridge_pad(skb) (0)
100 #endif /* CONFIG_BRIDGE_NETFILTER */
102 #endif /* __KERNEL__ */