hdr.h File Reference

Generic network interface header. More...

Detailed Description

Generic network interface header.

Author

Hauke Petersen hauke.nosp@m..pet.nosp@m.ersen.nosp@m.@fu-.nosp@m.berli.nosp@m.n.de

Martine Lenders mlend.nosp@m.ers@.nosp@m.inf.f.nosp@m.u-be.nosp@m.rlin..nosp@m.de

Definition in file hdr.h.

#include <errno.h>
#include <string.h>
#include <stdint.h>
#include "net/gnrc/netif/internal.h"
#include "net/gnrc/pkt.h"
#include "net/gnrc/pktbuf.h"
#include "net/gnrc/netif.h"
#include "time_units.h"

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Data Structures
struct	gnrc_netif_hdr_t
	Generic network interface header. More...

Macros
#define	GNRC_NETIF_HDR_L2ADDR_MAX_LEN   (8)
	Maximum length of the l2 addresses of the generic interface header in bytes.
#define	GNRC_NETIF_HDR_L2ADDR_PRINT_LEN   (GNRC_NETIF_HDR_L2ADDR_MAX_LEN * 3)
	Maximum length of the string representatiom of l2 addresses of the generic interface header in bytes.
#define	GNRC_NETIF_HDR_NO_RSSI   (INT16_MIN)
	Special value to indicate that no RSSI value is present.
#define	GNRC_NETIF_HDR_NO_LQI   (0)
	Special value to indicate that no LQI value is present.

Functions
static void	gnrc_netif_hdr_init (gnrc_netif_hdr_t *hdr, uint8_t src_l2addr_len, uint8_t dst_l2addr_len)
	Initialize the given generic network interface header.
static size_t	gnrc_netif_hdr_sizeof (const gnrc_netif_hdr_t *hdr)
	Get the size of the given generic network interface header.
static uint8_t *	gnrc_netif_hdr_get_src_addr (const gnrc_netif_hdr_t *hdr)
	Get the source address from the given header.
static void	gnrc_netif_hdr_set_src_addr (gnrc_netif_hdr_t *hdr, const uint8_t *addr, uint8_t addr_len)
	Set the source address in the given header.
static uint8_t *	gnrc_netif_hdr_get_dst_addr (const gnrc_netif_hdr_t *hdr)
	Get the destination address from the given header.
static void	gnrc_netif_hdr_set_dst_addr (gnrc_netif_hdr_t *hdr, const uint8_t *addr, uint8_t addr_len)
	Set the destination address in the given header.
static void	gnrc_netif_hdr_set_timestamp (gnrc_netif_hdr_t *hdr, uint64_t timestamp)
	Set the timestamp in the netif header.
static int	gnrc_netif_hdr_get_timestamp (const gnrc_netif_hdr_t *hdr, uint64_t *dest)
	Get the timestamp of the frame in nanoseconds since epoch.
static int	gnrc_netif_hdr_ipv6_iid_from_src (const gnrc_netif_t *netif, const gnrc_netif_hdr_t *hdr, eui64_t *iid)
	Converts the source address of a given Generic network interface header to an IPv6 IID.
static int	gnrc_netif_hdr_ipv6_iid_from_dst (const gnrc_netif_t *netif, const gnrc_netif_hdr_t *hdr, eui64_t *iid)
	Converts the destination address of a given Generic network interface header to an IPv6 IID.
gnrc_pktsnip_t *	gnrc_netif_hdr_build (const uint8_t *src, uint8_t src_len, const uint8_t *dst, uint8_t dst_len)
	Builds a generic network interface header for sending and adds it to the packet buffer.
static gnrc_netif_t *	gnrc_netif_hdr_get_netif (const gnrc_netif_hdr_t *hdr)
	Convenience function to get the corresponding interface struct for a given interface header.
static void	gnrc_netif_hdr_set_netif (gnrc_netif_hdr_t *hdr, const gnrc_netif_t *netif)
	Convenience function to set the interface of an interface header, given the network interface.
void	gnrc_netif_hdr_print (gnrc_netif_hdr_t *hdr)
	Outputs a generic interface header to stdout.
uint8_t	gnrc_netif_hdr_get_flag (gnrc_pktsnip_t *pkt)
	Fetch the netif header flags of a gnrc packet.
int	gnrc_netif_hdr_get_dstaddr (gnrc_pktsnip_t *pkt, uint8_t **pointer_to_addr)
	Extract the destination address out of a gnrc packet.
int	gnrc_netif_hdr_get_srcaddr (gnrc_pktsnip_t *pkt, uint8_t **pointer_to_addr)
	Extract the source address out of a gnrc packet.

Flags for the gnrc_netif_hdr_t
#define	GNRC_NETIF_HDR_FLAGS_BROADCAST   (0x80)
	Send packet broadcast.
#define	GNRC_NETIF_HDR_FLAGS_MULTICAST   (0x40)
	Send packet multicast.
#define	GNRC_NETIF_HDR_FLAGS_MORE_DATA   (0x10)
	More data will follow.
#define	GNRC_NETIF_HDR_FLAGS_TIMESTAMP   (0x08)
	Indicate presence of a valid timestamp.