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ng_ethernet: Add IID generator

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Martine Lenders 2015-06-03 16:26:28 +02:00 committed by Martine Lenders
parent 1208b719a3
commit b70100fdd6
1 changed files with 26 additions and 0 deletions
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26
sys/include/net/ng_ethernet.h
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@ -22,7 +22,10 @@
#ifndef NG_ETHERNET_H_
#define NG_ETHERNET_H_
#include <stdint.h>
#include "net/ng_ethernet/hdr.h"
#include "net/eui64.h"
#ifdef __cplusplus
extern "C" {
@ -46,6 +49,29 @@ extern "C" {
#define NG_ETHERNET_MAX_LEN (NG_ETHERNET_FRAME_LEN + \
NG_ETHERNET_FCS_LEN)
/**
* @brief Generates an IPv6 interface identifier from a 48-bit MAC address.
*
* @see <a href="https://tools.ietf.org/html/rfc2464#section-4">
* RFC 2464, section 4
* </a>
*
* @param[out] eui64 The resulting EUI-64.
* @param[in] mac A 48-bit MAC address. Is expected to be at least
* @ref NG_ETHERNET_ADDR_LEN long.
*/
static inline void ng_ethernet_get_iid(eui64_t *eui64, uint8_t *mac)
{
eui64->uint8[0] = mac[0] ^ 0x02;
eui64->uint8[1] = mac[1];
eui64->uint8[2] = mac[2];
eui64->uint8[3] = 0xff;
eui64->uint8[4] = 0xfe;
eui64->uint8[5] = mac[3];
eui64->uint8[6] = mac[4];
eui64->uint8[7] = mac[5];
}
#ifdef __cplusplus
}
#endif