Files | |
file | gnrc/netif/hdr.h |
Generic network interface header. | |
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. | |
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. More... | |
static size_t | gnrc_netif_hdr_sizeof (gnrc_netif_hdr_t *hdr) |
Get the size of the given generic network interface header. More... | |
static uint8_t * | gnrc_netif_hdr_get_src_addr (gnrc_netif_hdr_t *hdr) |
Get the source address from the given header. More... | |
static void | gnrc_netif_hdr_set_src_addr (gnrc_netif_hdr_t *hdr, uint8_t *addr, uint8_t addr_len) |
Set the source address in the given header. More... | |
static uint8_t * | gnrc_netif_hdr_get_dst_addr (gnrc_netif_hdr_t *hdr) |
Get the destination address from the given header. More... | |
static void | gnrc_netif_hdr_set_dst_addr (gnrc_netif_hdr_t *hdr, uint8_t *addr, uint8_t addr_len) |
Set the destination address in the given header. More... | |
gnrc_pktsnip_t * | gnrc_netif_hdr_build (uint8_t *src, uint8_t src_len, uint8_t *dst, uint8_t dst_len) |
Builds a generic network interface header for sending and adds it to the packet buffer. More... | |
void | gnrc_netif_hdr_print (gnrc_netif_hdr_t *hdr) |
Outputs a generic interface header to stdout. More... | |
uint8_t | gnrc_netif_hdr_get_flag (gnrc_pktsnip_t *pkt) |
Fetch the netif header flags of a gnrc packet. More... | |
int | gnrc_netif_hdr_get_dstaddr (gnrc_pktsnip_t *pkt, uint8_t **pointer_to_addr) |
Extract the destination address out of a gnrc packet. More... | |
int | gnrc_netif_hdr_get_srcaddr (gnrc_pktsnip_t *pkt, uint8_t **pointer_to_addr) |
Extract the source address out of a gnrc packet. More... | |
Flags for the gnrc_netif_hdr_t | |
#define | GNRC_NETIF_HDR_FLAGS_BROADCAST (0x80) |
Send packet broadcast. More... | |
#define | GNRC_NETIF_HDR_FLAGS_MULTICAST (0x40) |
Send packet multicast. More... | |
#define GNRC_NETIF_HDR_FLAGS_BROADCAST (0x80) |
Send packet broadcast.
Packets with this flag set must be send broadcast. gnrc_netif_hdr_t::dst_l2addr_len and any appended destination address must be ignored. If the link layer does not support broadcast the packet must be dropped silently.
Definition at line 59 of file gnrc/netif/hdr.h.
#define GNRC_NETIF_HDR_FLAGS_MULTICAST (0x40) |
Send packet multicast.
Packets with this flag set must be send multicast. gnrc_netif_hdr_t::dst_l2addr_len and any appended destination address must be ignored. The context for the multicast address must be derived from the network layer destination address. If the link layer does not support multicast it should interpret this flag the same way it does GNRC_NETIF_HDR_FLAGS_BROADCAST.
Definition at line 72 of file gnrc/netif/hdr.h.
gnrc_pktsnip_t* gnrc_netif_hdr_build | ( | uint8_t * | src, |
uint8_t | src_len, | ||
uint8_t * | dst, | ||
uint8_t | dst_len | ||
) |
Builds a generic network interface header for sending and adds it to the packet buffer.
[in] | src | Source address for the header. Can be NULL if not known or required. |
[in] | src_len | Length of src . Can be 0 if not known or required. |
[in] | dst | Destination address for the header. Can be NULL if not known or required. |
[in] | dst_len | Length of dst . Can be 0 if not known or required. |
|
inlinestatic |
Get the destination address from the given header.
[in] | hdr | header to read from |
Definition at line 162 of file gnrc/netif/hdr.h.
int gnrc_netif_hdr_get_dstaddr | ( | gnrc_pktsnip_t * | pkt, |
uint8_t ** | pointer_to_addr | ||
) |
Extract the destination address out of a gnrc packet.
[in] | pkt | gnrc packet from whom to extract |
[out] | pointer_to_addr | pointer to address will be stored here |
pkt
or if no destination address field presented in netif header. uint8_t gnrc_netif_hdr_get_flag | ( | gnrc_pktsnip_t * | pkt | ) |
Fetch the netif header flags of a gnrc packet.
[in] | pkt | gnrc packet from whom to fetch |
pkt
|
inlinestatic |
Get the source address from the given header.
[in] | hdr | header to read from |
Definition at line 131 of file gnrc/netif/hdr.h.
int gnrc_netif_hdr_get_srcaddr | ( | gnrc_pktsnip_t * | pkt, |
uint8_t ** | pointer_to_addr | ||
) |
Extract the source address out of a gnrc packet.
[in] | pkt | gnrc packet from whom to extract |
[out] | pointer_to_addr | pointer to address will be stored here |
pkt
or if no source address field presented in netif header.
|
inlinestatic |
Initialize the given generic network interface header.
[in] | hdr | header to initialize |
[in] | src_l2addr_len | link layer source address length |
[in] | dst_l2addr_len | link layer destination address length |
Definition at line 99 of file gnrc/netif/hdr.h.
void gnrc_netif_hdr_print | ( | gnrc_netif_hdr_t * | hdr | ) |
Outputs a generic interface header to stdout.
[in] | hdr | A generic interface header. |
|
inlinestatic |
Set the destination address in the given header.
[in] | hdr | header to write to |
[in] | addr | new destination address |
[in] | addr_len | addr length |
Definition at line 174 of file gnrc/netif/hdr.h.
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inlinestatic |
Set the source address in the given header.
[in] | hdr | header to write to |
[in] | addr | new source address |
[in] | addr_len | addr length |
Definition at line 143 of file gnrc/netif/hdr.h.
|
inlinestatic |
Get the size of the given generic network interface header.
[in] | hdr | header to get the size of |
Definition at line 118 of file gnrc/netif/hdr.h.