[PATCH 4/5] ipv6: addrconf: fix 48 bit 6lowpan autoconfiguration
From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date: 2017-02-09 14:55:50
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
From: Alexander Aring <redacted> This patch adds support for 48 bit 6LoWPAN address length autoconfiguration which is the case for BTLE 6LoWPAN. Signed-off-by: Alexander Aring <redacted> Signed-off-by: Luiz Augusto von Dentz <redacted> --- 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 ac9bd56..dede33f 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c@@ -2050,12 +2050,19 @@ 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; }
@@ -2146,7 +2153,7 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) case ARPHRD_IPGRE: 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:
--
2.9.3