mac-sequence.c File Reference

    MAC sequence numbers management

Author

Adam Dunkels adam@.nosp@m.sics.nosp@m..se Benoît Thébaudeau benoi.nosp@m.t.th.nosp@m.ebaud.nosp@m.eau@.nosp@m.advan.nosp@m.see..nosp@m.com

#include <string.h>
#include "contiki-net.h"
#include "net/mac/mac-sequence.h"
#include "net/packetbuf.h"
#include "net/rime/rime.h"

Data Structures
struct	seqno

Macros
#define	MAX_SEQNOS   16

Functions
int	mac_sequence_is_duplicate (void)
	Tell whether the packetbuf is a duplicate packet. More...
void	mac_sequence_register_seqno (void)
	Register the sequence number of the packetbuf. More...

Variables
static struct seqno	received_seqnos [MAX_SEQNOS]

#define MAX_SEQNOS   16

Referenced by mac_sequence_is_duplicate(), and mac_sequence_register_seqno().

int mac_sequence_is_duplicate

(

void

)

Tell whether the packetbuf is a duplicate packet.

Returns

Non-zero if the packetbuf is a duplicate packet, zero otherwise

        This function is used to check for duplicate packet by comparing
        the sequence number of the incoming packet with the last few ones
        we saw, filtering with the Rime address.

References i, linkaddr_cmp(), MAX_SEQNOS, packetbuf_addr(), PACKETBUF_ADDR_SENDER, packetbuf_attr(), PACKETBUF_ATTR_PACKET_ID, received_seqnos, and seqno::sender.

Referenced by input_packet(), and packet_input().

void mac_sequence_register_seqno

(

void

)

Register the sequence number of the packetbuf.

This function is used to add the sequence number of the incoming packet to the history.

References i, j, linkaddr_cmp(), linkaddr_copy(), MAX_SEQNOS, packetbuf_addr(), PACKETBUF_ADDR_SENDER, packetbuf_attr(), PACKETBUF_ATTR_PACKET_ID, received_seqnos, seqno::sender, and seqno::seqno.

Referenced by input_packet(), and packet_input().

struct seqno received_seqnos[MAX_SEQNOS]

static

Referenced by mac_sequence_is_duplicate(), and mac_sequence_register_seqno().