#ifndef AODV_H
#define AODV_H
#include <linux/if_ether.h>
#include <linux/if.h>

#define AODVPORT               654
#define TRUE		1
#define FALSE 		0

#define MAX(a,b) (((a)>(b))?(a):(b))

#define ACTIVE_ROUTE_TIMEOUT   3000
#define ALLOWED_HELLO_LOSS     3
#define DELETE_PERIOD           MAX((ACTIVE_ROUTE_TIMEOUT),((ALLOWED_HELLO_LOSS)*(HELLO_INTERVAL)))
#define HELLO_INTERVAL         1000
#define MY_ROUTE_TIMEOUT       2 * (ACTIVE_ROUTE_TIMEOUT)
#define NET_DIAMETER           35
#define NET_TRAVERSAL_TIME 3 * NODE_TRAVERSAL_TIME * NET_DIAMETER / 2
#define NEXT_HOP_WAIT          (NODE_TRAVERSAL_TIME) + 10
#define NODE_TRAVERSAL_TIME    50
#define PATH_TRAVERSAL_TIME  2 * NET_TRAVERSAL_TIME
#define RREQ_RETRIES           2
#define TTL_START              1
#define TTL_INCREMENT          2
#define TTL_THRESHOLD           7


#define RREQ                   1
#define RREP                   2
#define RERR                   3


#define EVENT_RREQ 1
#define EVENT_RREP 2
#define EVENT_RERR 3
#define EVENT_RREP_ACK 4
#define EVENT_REBROADCAST 5
#define EVENT_HELLO 102
#define EVENT_CLEANUP 101
#define EVENT_NEIGHBOR 103
#define FLAGS_ALL 255



extern u_int8_t	USE_LO;
extern struct metric monitor;
extern char g_block_dev[8];
extern char g_aodv_dev[8];
extern u_int32_t g_aodv_subnet;

struct metric
{
u_int32_t bytes;
u_int32_t packets;
u_int32_t routing_packets;
u_int16_t rreq; 
u_int16_t rrep;
u_int16_t rrer;
u_int64_t last_read;
};




// Route table

struct route_table_entry
{
    u_int32_t dst_ip;
    u_int32_t dst_seq;
    u_int32_t old_dst_seq;
    u_int8_t hop_count;
    u_int32_t next_hop;
    struct precursor_entry *precursors;
    u_int64_t lifetime;
    struct net_device *dev;
    u_int8_t link;
u_int8_t	route_valid:1;
u_int8_t	route_seq_valid:1;
    struct route_table_entry *next;
    struct route_table_entry *prev;
    u_int32_t rreq_id;
u_int8_t self_route:1;
};


struct precursor_entry
{
    u_int32_t ip;
    struct precursor_entry *next;
    struct precursor_entry *prev;
    int ishead;
};


// Used to stores a list of the different interfaces

struct interface_list_entry
{
    struct net_device * dev;
    struct route_table_entry *route_entry;
    int	index;
    u_int32_t	ip;
    char	name[IFNAMSIZ];
    struct interface_list_entry *next;
    struct socket *sock;
    u_int64_t last_hello;
    u_int64_t last_broadcast;
};

struct neighbor_list_entry
{
    u_int32_t	ip;
    u_int64_t	lifetime;

    unsigned char hw_addr[ETH_ALEN];
    struct net_device *dev;
    struct route_table_entry *route_entry;
    u_int8_t link;
    struct neighbor_list_entry *next;

};

struct flood_id_queue_entry
{
    u_int32_t          src_ip;
  u_int32_t dst_ip;
    u_int32_t          flood_id;
    u_int64_t          lifetime;
    struct flood_id_queue_entry *next;
};

//Used to queue events which Aodv Thread has to act on

struct event_queue_entry
{

    u_int32_t dst_ip;
    u_int32_t src_ip;
    struct net_device	 *dev;
    int       type;
    unsigned int       size;
    int 	id;
    u_int8_t	ttl;
    void	*data;
    u_int64_t time;
    unsigned char src_hw_addr[ETH_ALEN];
    struct event_queue_entry *next;
    struct event_queue_entry *prev;

};

struct rebroadcast_queue_entry
{

    u_int32_t dst_ip;
    unsigned int       size;
    u_int8_t	ttl;
    void	*data;
    u_int64_t time;
    struct rebroadcast_queue_entry *next;
    struct rebroadcast_queue_entry *prev;

};

struct timer_queue_entry
{
    u_int64_t tv;  /* Time the event should happend in ms since 1 jan 1970 */

    int size;
    u_int32_t id;  /* An id used to match one or a group of entrys */
    u_int8_t ttl;
    u_int16_t	retries;
    unsigned char flags;  /* Flag which represents what's in the dataportion */
    struct timer_queue_entry *next;  /* A pointer to the next entry in the list */
    void *data;    /* Data stored in the entry */
};




//Route reply message type
struct rrep_ack
{
    u_int8_t type;
    u_int8_t reserved;
};

struct rrep
{
    u_int8_t     type;

#if defined(__BIG_ENDIAN_BITFIELD)
unsigned int r:1;
unsigned int a:1;
unsigned int reserved1:6;
unsigned int reserved2:3;
unsigned int prefix_sz:5;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
unsigned int reserved1:6;
unsigned int r:1;
unsigned int a:1;
unsigned int prefix_sz:5;
unsigned int reserved2:3;
#else
#error "Please fix <asm/byteorder.h>"
#endif

    u_int8_t     hop_count;
    u_int32_t    dst_ip;
    u_int32_t    dst_seq;
    u_int32_t    src_ip;
    u_int32_t    lifetime;
};


//Endian handling based on DSR implemetation by Alex Song s369677@student.uq.edu.au

struct rreq
{
    u_int8_t     type;

#if defined(__BIG_ENDIAN_BITFIELD)
u_int8_t  j:1;
u_int8_t  r:1;
u_int8_t  g:1;
u_int8_t  d:1;
u_int8_t  u:1;
u_int8_t  reserved:3;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
u_int8_t  reserved:3;
u_int8_t  u:1;
u_int8_t  d:1;
u_int8_t  g:1;
u_int8_t  r:1;
u_int8_t  j:1;
#else
#error "Please fix <asm/byteorder.h>"
#endif



    u_int8_t second_reserved;
    u_int8_t     hop_count;
    u_int32_t    rreq_id;
    u_int32_t    dst_ip;
    u_int32_t    dst_seq;
    u_int32_t    src_ip;
    u_int32_t    src_seq;
};



// An unreacable destination, contained in an RERR

struct rerr_unr_dst
{
    u_int32_t unr_dst_ip;
    u_int32_t unr_dst_seq;
    struct rerr_unr_dst *next;
};



struct rerrhdr
{
    u_int8_t type;

    unsigned int dst_count;
    struct rerr_unr_dst *unr_dst;
};

struct rerr
{
    u_int8_t type;

#if defined(__BIG_ENDIAN_BITFIELD)
unsigned int n:1;
unsigned int reserved:15;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
unsigned int reserved:15;
unsigned int n:1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
unsigned int dst_count:8;
};

struct rerrdst
{
    u_int32_t unr_dst_ip;
    u_int32_t unr_dst_seq;
};




#endif