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#ifndef _HELPER_H_
#define _HELPER_H_
#include <stdint.h>
#include "../../../include/linux_list.h"
struct nf_conntrack;
struct cthelper_proto_l4_helper {
struct list_head head;
unsigned int l4protonum;
void (*l4ct_build)(const uint8_t *pkt, struct nf_conntrack *ct);
int (*l4ct_cmp_orig)(const uint8_t *pkt, struct nf_conntrack *ct);
int (*l4ct_cmp_repl)(const uint8_t *pkt, struct nf_conntrack *ct);
int (*l4ct_cmp_port)(struct nf_conntrack *ct, uint16_t port);
int (*l4pkt_no_data)(const uint8_t *pkt);
};
struct cthelper_proto_l2l3_helper {
struct list_head head;
unsigned int l2protonum;
unsigned int l2hdr_len;
unsigned int l3protonum;
void (*l3ct_build)(const uint8_t *pkt, struct nf_conntrack *ct);
int (*l3ct_cmp_orig)(const uint8_t *pkt, struct nf_conntrack *ct);
int (*l3ct_cmp_repl)(const uint8_t *pkt, struct nf_conntrack *ct);
int (*l3pkt_hdr_len)(const uint8_t *pkt);
int (*l4pkt_proto)(const uint8_t *pkt);
};
struct cthelper_proto_l2l3_helper *cthelper_proto_l2l3_helper_find(const uint8_t *pkt, unsigned int *l4protonum, unsigned int *l3hdr_len);
void cthelper_proto_l2l3_helper_register(struct cthelper_proto_l2l3_helper *h);
struct cthelper_proto_l4_helper *cthelper_proto_l4_helper_find(const uint8_t *pkt, unsigned int l4protonum);
void cthelper_proto_l4_helper_register(struct cthelper_proto_l4_helper *h);
/* Initialization of supported protocols here. */
void l2l3_ipv4_init(void);
void l4_tcp_init(void);
void l4_udp_init(void);
#endif
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