From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 1.mo2.mail-out.ovh.net ([46.105.63.121] helo=mo2.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VMtYN-0008Ju-BH for barebox@lists.infradead.org; Fri, 20 Sep 2013 05:46:55 +0000 Received: from mail406.ha.ovh.net (b9.ovh.net [213.186.33.59]) by mo2.mail-out.ovh.net (Postfix) with SMTP id D6A76DC8B91 for ; Fri, 20 Sep 2013 07:46:34 +0200 (CEST) From: Jean-Christophe PLAGNIOL-VILLARD Date: Fri, 20 Sep 2013 07:47:43 +0200 Message-Id: <1379656065-23690-1-git-send-email-plagnioj@jcrosoft.com> In-Reply-To: <20130920054640.GD1137@ns203013.ovh.net> References: <20130920054640.GD1137@ns203013.ovh.net> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/3] introduce helper to generate mac address with OUI To: barebox@lists.infradead.org use random mac address with fixed OUI provided Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- include/local_mac_address.h | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 include/local_mac_address.h diff --git a/include/local_mac_address.h b/include/local_mac_address.h new file mode 100644 index 0000000..3920334 --- /dev/null +++ b/include/local_mac_address.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD + * + * Under GPLv2 only + */ + +#ifndef __LOCAL_MAC_ADDRESS_H__ +#define __LOCAL_MAC_ADDRESS_H__ + +/** + * local_mac_address_register - use random number with fix + * OUI provided device to provide an Ethernet address + * @ethid: ethernet device id + * @oui: Ethernet OUI (3 bytes) + * + * Generate a local Ethernet address (MAC) that is not multicast using a 1-wire id. + */ +static inline int local_mac_address_register(int ethid, char * oui) +{ + char addr[6]; + int nb_oui = 3; + int i; + + if (!oui) + return -EINVAL; + + random_ether_addr(addr); + + for (i = 0; i < nb_oui; i++) + addr[i] = oui[i]; + + addr[0] &= 0xfe; /* clear multicast bit */ + addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ + + eth_register_ethaddr(ethid, addr); + + return 0; +} + +#endif /* __LOCAL_MAC_ADDRESS_H__ */ -- 1.8.4.rc1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox