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sys/luid: add luid_netdev_get_eui48() & luid_netdev_get_eui64()

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Add functions to generate an EUI based on the netdev ID.
This will always return the same EUI for the same netdev, so it is
stable across netdev resets.
This commit is contained in:
Benjamin Valentin 2020-08-18 10:39:58 +02:00
parent f4a2148642
commit 3b7351753b
2 changed files with 57 additions and 0 deletions
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27
sys/include/luid.h
View File

@ -57,6 +57,7 @@
#include "net/eui48.h"
#include "net/eui64.h"
#include "net/netdev.h"
#ifdef __cplusplus
extern "C" {
@ -127,6 +128,19 @@ void luid_get_short(network_uint16_t *addr);
*/
void luid_get_eui48(eui48_t *addr);
/**
* @brief Get a unique EUI48 address
*
* The resulting address is built from the base ID generated with luid_base(), which
* isXORed with the netdev type and netdev index in the least significant bytes.
*
* @pre the netdev registered itself with @see netdev_register
*
* @param[in] netdev Netdev to generate the EUI48 for.
* @param[out] addr memory location to copy the address into.
*/
void luid_netdev_get_eui48(const netdev_t *netdev, eui48_t *addr);
/**
* @brief Get a unique EUI64 address
*
@ -139,6 +153,19 @@ void luid_get_eui48(eui48_t *addr);
*/
void luid_get_eui64(eui64_t *addr);
/**
* @brief Get a unique EUI64 address
*
* The resulting address is built from the base ID generated with luid_base(), which
* isXORed with the netdev type and netdev index in the least significant bytes.
*
* @pre the netdev registered itself with @see netdev_register
*
* @param[in] netdev Netdev to generate the EUI64 for.
* @param[out] addr memory location to copy the address into.
*/
void luid_netdev_get_eui64(const netdev_t *netdev, eui64_t *addr);
/**
* @brief Get a custom unique ID based on a user given generator value
*

30
sys/luid/luid.c
View File

@ -89,6 +89,21 @@ void luid_get_eui48(eui48_t *addr)
eui48_clear_group(addr);
}
void luid_netdev_get_eui48(const netdev_t *netdev, eui48_t *addr)
{
luid_base(addr, sizeof(*addr));
#ifdef MODULE_NETDEV_REGISTER
addr->uint8[4] ^= netdev->type;
addr->uint8[5] ^= netdev->index;
#else
/* we should only get here with gnrc_netif_single */
(void)netdev;
#endif
eui48_set_local(addr);
eui48_clear_group(addr);
}
void luid_get_eui64(eui64_t *addr)
{
luid_base(addr, sizeof(*addr));
@ -97,3 +112,18 @@ void luid_get_eui64(eui64_t *addr)
eui64_set_local(addr);
eui64_clear_group(addr);
}
void luid_netdev_get_eui64(const netdev_t *netdev, eui64_t *addr)
{
luid_base(addr, sizeof(*addr));
#ifdef MODULE_NETDEV_REGISTER
addr->uint8[6] ^= netdev->type;
addr->uint8[7] ^= netdev->index;
#else
/* we should only get here with gnrc_netif_single */
(void)netdev;
#endif
eui64_set_local(addr);
eui64_clear_group(addr);
}