From 8a7a4b476719df1e06f8eae837b13bdf79908843 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sun, 12 Mar 2017 10:19:36 +0200 Subject: [PATCH] ipv6: addrconf: fix 48 bit 6lowpan autoconfiguration This patch adds support for 48 bit 6LoWPAN address length autoconfiguration which is the case for BTLE 6LoWPAN. Signed-off-by: Alexander Aring Signed-off-by: Luiz Augusto von Dentz Reviewed-by: Stefan Schmidt Acked-by: David S. Miller Signed-off-by: Marcel Holtmann --- net/ipv6/addrconf.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 67ec87ea5fb6..b22796e707d3 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2073,12 +2073,19 @@ static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) __ipv6_dev_ac_dec(ifp->idev, &addr); } -static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) +static int addrconf_ifid_6lowpan(u8 *eui, struct net_device *dev) { - if (dev->addr_len != EUI64_ADDR_LEN) + switch (dev->addr_len) { + case ETH_ALEN: + return addrconf_ifid_eui48(eui, dev); + case EUI64_ADDR_LEN: + memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); + eui[0] ^= 2; + break; + default: return -1; - memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); - eui[0] ^= 2; + } + return 0; } @@ -2170,7 +2177,7 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) case ARPHRD_TUNNEL: return addrconf_ifid_gre(eui, dev); case ARPHRD_6LOWPAN: - return addrconf_ifid_eui64(eui, dev); + return addrconf_ifid_6lowpan(eui, dev); case ARPHRD_IEEE1394: return addrconf_ifid_ieee1394(eui, dev); case ARPHRD_TUNNEL6: -- 2.30.2