From 03c1b04f86ddd6a296e2d80d73f5e4670e55da1d Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Tue, 5 Jun 2012 11:33:16 +0000 Subject: net: add helper to generate random mac address Add new function eth_random_enetaddr() to generate a locally administered ethernet address. Signed-off-by: Michael Walle Acked-by: Joe Hershberger --- include/net.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include') diff --git a/include/net.h b/include/net.h index a092f291bbc..6d2d6cd8495 100644 --- a/include/net.h +++ b/include/net.h @@ -122,6 +122,23 @@ 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 */ -- cgit v1.2.3