diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/net.h | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/include/net.h b/include/net.h index 0802fad8761..735b0b9d26f 100644 --- a/include/net.h +++ b/include/net.h @@ -130,23 +130,6 @@ extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr); extern int eth_getenv_enetaddr_by_index(const char *base_name, int index, uchar *enetaddr); -#ifdef CONFIG_RANDOM_MACADDR -/* - * The u-boot policy does not allow hardcoded ethernet addresses. Under the - * following circumstances a random generated address is allowed: - * - in emergency cases, where you need a working network connection to set - * the ethernet address. - * Eg. you want a rescue boot and don't have a serial port to access the - * CLI to set environment variables. - * - * In these cases, we generate a random locally administered ethernet address. - * - * Args: - * enetaddr - returns 6 byte hardware address - */ -extern void eth_random_enetaddr(uchar *enetaddr); -#endif - extern int usb_eth_initialize(bd_t *bi); extern int eth_init(bd_t *bis); /* Initialize the device */ extern int eth_send(void *packet, int length); /* Send a packet */ @@ -674,6 +657,25 @@ static inline int is_valid_ether_addr(const u8 *addr) return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr); } +/** + * eth_random_addr - Generate software assigned random Ethernet address + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Generate a random Ethernet address (MAC) that is not multicast + * and has the local assigned bit set. + */ +static inline void eth_random_addr(uchar *addr) +{ + int i; + unsigned int seed = get_timer(0); + + for (i = 0; i < 6; i++) + addr[i] = rand_r(&seed); + + addr[0] &= 0xfe; /* clear multicast bit */ + addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ +} + /* Convert an IP address to a string */ extern void ip_to_string(IPaddr_t x, char *s); |