#ifndef _CONNTRACK_API_H
#define _CONNTRACK_API_H
#include <net/netfilter/nf_conntrack.h>

extern seqcount_t nf_conntrack_generation;
extern u32 cmhi_seed;
#define CMHI_EXT_ERR -1
#define CMHI_EXT_OK 0

typedef enum{
    USER_ID,
    USER_VERSION,
    NODE_INDEX,
    APP_ID,
    POLICY_VERSION,
    ACTION,
}cmhi_ext_type;

//modify cmhi_ext_info   u_int32_t status
typedef enum{
    /*skb pass or not*/
    //CMHI_EXT_PASS_BIT = 0,
    CMHI_EXT_PASS = (1 << 0),

    /*skb go to dpi or not*/
    //CMHI_EXT_GOTO_DPI_BIT = 1,
    CMHI_EXT_GOTO_DPI = (1 << 1),
}cmhi_ext_action_bit;


struct dpi_tuple{
	__be32 sip;
	__be32 dip;
	__be16 sport;
	__be16 dport;
	u_int8_t protonum;
};
struct dpi{
	struct dpi_tuple tuple; /* dpi???a¡Á¨¦ */
	uint16_t aid; /* app id */
};

int cmhi_set_conntrack_u16(const struct sk_buff *skb, uint16_t value, cmhi_ext_type type);
int cmhi_set_conntrack_u32(const struct sk_buff *skb, uint32_t value, cmhi_ext_type type);
int cmhi_set_conntrack_action_by_bit(const struct sk_buff *skb, cmhi_ext_action_bit abit);

int cmhi_get_conntrack_u16(const struct sk_buff *skb, uint16_t *value, cmhi_ext_type type);
int cmhi_get_conntrack_u32(const struct sk_buff *skb, uint32_t *value, cmhi_ext_type type);

int cmhi_del_conntrack(const struct sk_buff *skb, cmhi_ext_type type);
int cmhi_del_conntrack_action_by_bit(const struct sk_buff *skb, cmhi_ext_action_bit abit);
struct nf_conn *get_conntrack_from_tuple(struct dpi_tuple *dpi_tuple);
int set_aid_by_dpi_tuple(struct dpi *dpi);
#endif /* _CONNTRACK_API_H */