#ifndef __LINUX_NETFILTER_H
#define __LINUX_NETFILTER_H

#include <linux/types.h>


/* Responses from hook functions. */
#define NF_DROP 0
#define NF_ACCEPT 1
#define NF_STOLEN 2
#define NF_QUEUE 3
#define NF_REPEAT 4
#define NF_STOP 5
#define NF_MAX_VERDICT NF_STOP

/* we overload the higher bits for encoding auxiliary data such as the queue
 * number. Not nice, but better than additional function arguments. */
#define NF_VERDICT_MASK 0x0000ffff
#define NF_VERDICT_BITS 16

#define NF_VERDICT_QMASK 0xffff0000
#define NF_VERDICT_QBITS 16

#define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE)

/* only for userspace compatibility */
/* Generic cache responses from hook functions.
   <= 0x2000 is used for protocol-flags. */
#define NFC_UNKNOWN 0x4000
#define NFC_ALTERED 0x8000

enum nf_inet_hooks {
        NF_INET_PRE_ROUTING,
        NF_INET_LOCAL_IN,
        NF_INET_FORWARD,
        NF_INET_LOCAL_OUT,
        NF_INET_POST_ROUTING,
        NF_INET_NUMHOOKS
};

enum {
        NFPROTO_UNSPEC =  0,
        NFPROTO_IPV4   =  2,
        NFPROTO_ARP    =  3,
        NFPROTO_BRIDGE =  7,
        NFPROTO_IPV6   = 10,
        NFPROTO_DECNET = 12,
        NFPROTO_NUMPROTO,
};

union nf_inet_addr {
        __u32                all[4];
        __be32                ip;
        __be32                ip6[4];
        struct in_addr        in;
        struct in6_addr        in6;
};

#endif /*__LINUX_NETFILTER_H*/