#ifndef _SESSION_ADDRESS_H
#define _SESSION_ADDRESS_H

#ifdef __cpluscplus
extern "C"
{
#endif

#include <arpa/inet.h>

#include "packet.h"

#define SESSION_ADDR_MAX_LAYER 8

enum layer_type
{
    LAYER_IPV4 = 0,
    LAYER_IPV6 = 1,
    LAYER_TCP = 2,
    LAYER_UDP = 3,
};

struct ipv4_address
{
    struct in_addr src; /* network order */
    struct in_addr dst; /* network order */
};

struct ipv6_address
{
    struct in6_addr src; /* network order */
    struct in6_addr dst; /* network order */
};

struct tcp_port
{
    uint16_t src; /* network order */
    uint16_t dst; /* network order */
};

struct udp_port
{
    uint16_t src; /* network order */
    uint16_t dst; /* network order */
};

struct layer_tuple
{
    enum layer_type type;
    union
    {
        struct ipv4_address ipv4;
        struct ipv6_address ipv6;
        struct tcp_port tcp;
        struct udp_port udp;
    } tuple;
};

struct session_address
{
    uint8_t used;
    struct layer_tuple layers[SESSION_ADDR_MAX_LAYER];
};

void session_address_init(struct session_address *addr, const struct packet *packet);
void session_address_tostring(const struct session_address *addr, char *buf, size_t len);
void session_address_reverse(struct session_address *addr);
int session_address_selfcmp(struct session_address *addr);

#ifdef __cpluscplus
}
#endif

#endif