From 2ad3ed59198c5404c34515cfcfd9a2b3c54d964f Mon Sep 17 00:00:00 2001
From: Alexander Aring <aar@pengutronix.de>
Date: Wed, 15 Jun 2016 21:20:17 +0200
Subject: 6lowpan: add 802.15.4 short addr slaac

This patch adds the autoconfiguration if a valid 802.15.4 short address
is available for 802.15.4 6LoWPAN interfaces.

Cc: David S. Miller <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <aar@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/6lowpan.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'include/net/6lowpan.h')

diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h
index 2d9b9d39221e..5ab4c9901ccc 100644
--- a/include/net/6lowpan.h
+++ b/include/net/6lowpan.h
@@ -254,6 +254,12 @@ static inline bool lowpan_fetch_skb(struct sk_buff *skb, void *data,
 	return false;
 }
 
+static inline bool lowpan_802154_is_valid_src_short_addr(__le16 addr)
+{
+	/* First bit of addr is multicast, reserved or 802.15.4 specific */
+	return !(addr & cpu_to_le16(0x8000));
+}
+
 static inline void lowpan_push_hc_data(u8 **hc_ptr, const void *data,
 				       const size_t len)
 {
-- 
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