#ifndef __RT__
#define __RT__

#include <stdint.h>
#include <stdbool.h>
#include <timerlib.h>

#define RT_TABLE_EXP_TIME	30  /*  30 sec */


typedef struct rt_entry_keys_ {

    char dest[16];
    char mask;
} rt_entry_keys_t;

typedef struct rt_entry_ {

    /* A Structure which represents only the keys of the
     * Routing Table.*/
    rt_entry_keys_t rt_entry_keys;

    char gw_ip[16];
    char oif[32];
    uint32_t time_to_expire; /* time left to delete the entry */
    Timer_t* timer;
    struct rt_entry_* prev;
    struct rt_entry_* next;
} rt_entry_t;

typedef struct rt_table_ {

    rt_entry_t* head;
} rt_table_t;

void
rt_init_rt_table(rt_table_t* rt_table);

bool
rt_add_new_rt_entry(rt_table_t* rt_table,
    char* dest_ip, char mask, char* gw_ip, char* oif, void (*timer_cb)(Timer_t*, void*));

bool
rt_delete_rt_entry(rt_table_t* rt_table,
    char* dest_ip, char mask);

bool
rt_update_rt_entry(rt_table_t* rt_table,
    char* dest_ip, char mask,
    char* new_gw_ip, char* new_oif);

void
rt_clear_rt_table(rt_table_t* rt_table);

void
rt_free_rt_table(rt_table_t* rt_table);

void
rt_dump_rt_table(rt_table_t* rt_table);

static inline void
rt_entry_remove(rt_table_t* rt_table,
    rt_entry_t* rt_entry) {

    if (!rt_entry->prev) {
        if (rt_entry->next) {
            rt_entry->next->prev = 0;
            rt_table->head = rt_entry->next;
            rt_entry->next = 0;
            return;
        }
        rt_table->head = NULL;
        return;
    }
    if (!rt_entry->next) {
        rt_entry->prev->next = 0;
        rt_entry->prev = 0;
        return;
    }

    rt_entry->prev->next = rt_entry->next;
    rt_entry->next->prev = rt_entry->prev;
    rt_entry->prev = 0;
    rt_entry->next = 0;
}

#define ITERTAE_RT_TABLE_BEGIN(rt_table_ptr, rt_entry_ptr)                \
{                                                                         \
    rt_entry_t *_next_rt_entry;                                           \
    for((rt_entry_ptr) = (rt_table_ptr)->head;                            \
            (rt_entry_ptr);                                               \
            (rt_entry_ptr) = _next_rt_entry) {                            \
        _next_rt_entry = (rt_entry_ptr)->next;

#define ITERTAE_RT_TABLE_END(rt_table_ptr, rt_entry_ptr)  }}

#endif /* __RT__ */