#ifndef SIXLOWPAN_H
#define SIXLOWPAN_H

#define IP_PROCESS_STACKSIZE    3072
#define NC_STACKSIZE            512
#define CON_STACKSIZE           512

/* fragment size in bytes*/
#define FRAG_PART_ONE_HDR_LEN   4
#define FRAG_PART_N_HDR_LEN     5

#define LOWPAN_IPHC_DISPATCH    0x60
#define LOWPAN_IPHC_FL_C        0x10
#define LOWPAN_IPHC_TC_C        0x08
#define LOWPAN_IPHC_CID         0x80
#define LOWPAN_IPHC_SAC         0x40
#define LOWPAN_IPHC_SAM         0x30
#define LOWPAN_IPHC_DAC         0x04
#define LOWPAN_IPHC_DAM         0x03
#define LOWPAN_IPHC_M           0x08
#define LOWPAN_IPHC_NH          0x04
#define LOWPAN_IPV6_DISPATCH    0x41
#define LOWPAN_CONTEXT_MAX      16

#define LOWPAN_REAS_BUF_TIMEOUT	60

#include "transceiver.h"
#include "sixlowip.h"
#include <vtimer.h>
#include <mutex.h>
#include <time.h>

extern mutex_t lowpan_context_mutex;

typedef struct lowpan_context_t {
    uint8_t num;
    ipv6_addr_t prefix;
    uint8_t length;
    uint8_t comp;
    uint16_t lifetime;
} lowpan_context_t;

typedef struct lowpan_interval_list_t {
	uint8_t							start;
	uint8_t							end;
	struct lowpan_interval_list_t 	*next;
} lowpan_interval_list_t;

typedef struct lowpan_reas_buf_t {
	ieee_802154_long_t 				s_laddr;					// Source Address
	ieee_802154_long_t 				d_laddr;					// Destination Address
	uint16_t						ident_no;					// Identification Number
	time_t							timestamp;					// Timestamp of last packet fragment
	uint8_t							packet_size;				// Size of reassembled packet with possible IPHC header
	uint8_t							current_packet_size;		// Additive size of currently already received fragments
	uint8_t							*packet;					// Pointer to allocated memory for reassembled packet + 6LoWPAN Dispatch Byte
	lowpan_interval_list_t			*interval_list_head;		// Pointer to list of intervals of received packet fragments (if any)
	struct lowpan_reas_buf_t		*next;						// Pointer to next reassembly buffer (if any)
} lowpan_reas_buf_t;

extern lowpan_reas_buf_t *head;

void sixlowpan_init(transceiver_type_t trans, uint8_t r_addr, int as_border);
void sixlowpan_adhoc_init(transceiver_type_t trans, ipv6_addr_t *prefix, uint8_t r_addr);
void lowpan_init(ieee_802154_long_t *addr, uint8_t *data);
void lowpan_read(uint8_t *data, uint8_t length, ieee_802154_long_t *s_laddr,
           ieee_802154_long_t *d_laddr);
void lowpan_iphc_encoding(ieee_802154_long_t *dest, ipv6_hdr_t *ipv6_buf_extra);
void lowpan_iphc_decoding(uint8_t *data, uint8_t length,
                          ieee_802154_long_t *s_laddr,
                          ieee_802154_long_t *d_laddr);
uint8_t lowpan_context_len();
lowpan_context_t * lowpan_context_update(
                        uint8_t num, const ipv6_addr_t *prefix, 
                        uint8_t length, uint8_t comp,
                        uint16_t lifetime);
lowpan_context_t * lowpan_context_get();
lowpan_context_t * lowpan_context_lookup(ipv6_addr_t *addr);
lowpan_context_t * lowpan_context_num_lookup(uint8_t num);
void lowpan_ipv6_set_dispatch(uint8_t *data);
void init_reas_bufs(lowpan_reas_buf_t *buf);
void printReasBuffers(void);
#endif