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#ifndef __LINUX_BRIDGE_NETFILTER_H
#define __LINUX_BRIDGE_NETFILTER_H
/* bridge-specific defines for netfilter.
*/
#include <linux/netfilter.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/if_pppox.h>
/* Bridge Hooks */
/* After promisc drops, checksum checks. */
#define NF_BR_PRE_ROUTING 0
/* If the packet is destined for this box. */
#define NF_BR_LOCAL_IN 1
/* If the packet is destined for another interface. */
#define NF_BR_FORWARD 2
/* Packets coming from a local process. */
#define NF_BR_LOCAL_OUT 3
/* Packets about to hit the wire. */
#define NF_BR_POST_ROUTING 4
/* Not really a hook, but used for the ebtables broute table */
#define NF_BR_BROUTING 5
#define NF_BR_NUMHOOKS 6
#ifdef __KERNEL__
enum nf_br_hook_priorities {
NF_BR_PRI_FIRST = INT_MIN,
NF_BR_PRI_NAT_DST_BRIDGED = -300,
NF_BR_PRI_FILTER_BRIDGED = -200,
NF_BR_PRI_BRNF = 0,
NF_BR_PRI_NAT_DST_OTHER = 100,
NF_BR_PRI_FILTER_OTHER = 200,
NF_BR_PRI_NAT_SRC = 300,
NF_BR_PRI_LAST = INT_MAX,
};
#ifdef CONFIG_BRIDGE_NETFILTER
#define BRNF_PKT_TYPE 0x01
#define BRNF_BRIDGED_DNAT 0x02
#define BRNF_DONT_TAKE_PARENT 0x04
#define BRNF_BRIDGED 0x08
#define BRNF_NF_BRIDGE_PREROUTING 0x10
/* Only used in br_forward.c */
extern int nf_bridge_copy_header(struct sk_buff *skb);
static inline int nf_bridge_maybe_copy_header(struct sk_buff *skb)
{
if (skb->nf_bridge)
return nf_bridge_copy_header(skb);
return 0;
}
/* This is called by the IP fragmenting code and it ensures there is
* enough room for the encapsulating header (if there is one). */
static inline int nf_bridge_pad(const struct sk_buff *skb)
{
int padding = 0;
if (skb->nf_bridge && skb->protocol == htons(ETH_P_8021Q))
padding = VLAN_HLEN;
else if (skb->nf_bridge && skb->protocol == htons(ETH_P_PPP_SES))
padding = PPPOE_SES_HLEN;
return padding;
}
struct bridge_skb_cb {
union {
__be32 ipv4;
} daddr;
};
#else
#define nf_bridge_maybe_copy_header(skb) (0)
#define nf_bridge_pad(skb) (0)
#endif /* CONFIG_BRIDGE_NETFILTER */
#endif /* __KERNEL__ */
#endif
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