From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:41364 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758448AbcCVNPo (ORCPT ); Tue, 22 Mar 2016 09:15:44 -0400 From: Alexander Aring Subject: [RFC bluetooth-next 13/19] addrconf: add 802.15.4 short addr slaac Date: Tue, 22 Mar 2016 14:15:09 +0100 Message-Id: <1458652515-7862-14-git-send-email-aar@pengutronix.de> In-Reply-To: <1458652515-7862-1-git-send-email-aar@pengutronix.de> References: <1458652515-7862-1-git-send-email-aar@pengutronix.de> Sender: linux-wpan-owner@vger.kernel.org List-ID: To: linux-wpan@vger.kernel.org Cc: kernel@pengutronix.de, jukka.rissanen@linux.intel.com, hannes@stressinduktion.org, stefan@osg.samsung.com, mcr@sandelman.ca, werner@almesberger.net, Alexander Aring This patch adds the autoconfiguration if a valid 802.15.4 short address is available for 802.15.4 6LoWPAN interfaces. Signed-off-by: Alexander Aring --- net/ipv6/addrconf.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 27aed1a..eb3e3fb 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3058,6 +3058,37 @@ static void ipv6_gen_mode_random_init(struct inet6_dev *idev) s->initialized = true; } +#ifdef CONFIG_IEEE802154_6LOWPAN +static int addrconf_ifid_ieee802154(u8 *eui, struct net_device *dev) +{ + struct wpan_dev *wpan_dev = lowpan_802154_dev(dev)->wdev->ieee802154_ptr; + + /* Set short_addr autoconfiguration if short_addr is present only */ + if (!ieee802154_is_valid_src_short_addr(wpan_dev->short_addr)) + return -1; + + /* For either address format, all zero addresses MUST NOT be used */ + if (wpan_dev->pan_id == cpu_to_le16(0x0000) && + wpan_dev->short_addr == cpu_to_le16(0x0000)) + return -1; + + /* Alternatively, if no PAN ID is known, 16 zero bits may be used */ + if (wpan_dev->pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST)) + memset(eui, 0, 2); + else + ieee802154_le16_to_be16(eui, &wpan_dev->pan_id); + + /* The "Universal/Local" (U/L) bit shall be set to zero */ + eui[0] &= ~2; + eui[2] = 0; + eui[3] = 0xFF; + eui[4] = 0xFE; + eui[5] = 0; + ieee802154_le16_to_be16(&eui[6], &wpan_dev->short_addr); + return 0; +} +#endif + static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) { struct in6_addr addr; @@ -3088,6 +3119,15 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) addrconf_add_linklocal(idev, &addr, 0); else if (prefix_route) addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); + +#ifdef CONFIG_IEEE802154_6LOWPAN + /* 802.15.4 6LoWPAN short address slaac handling */ + if (lowpan_is_ll(idev->dev, LOWPAN_LLTYPE_IEEE802154)) { + if (addrconf_ifid_ieee802154(addr.s6_addr + 8, + idev->dev) == 0) + addrconf_add_linklocal(idev, &addr, 0); + } +#endif break; case IN6_ADDR_GEN_MODE_NONE: default: -- 2.7.4