linux-kernel - [PATCH 3.17 104/146] Bluetooth: 6lowpan: Set the peer IPv6 address correctly

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Date:	Tue, 28 Oct 2014 11:34:06 +0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Jukka Rissanen <jukka.rissanen@...ux.intel.com>,
	Marcel Holtmann <marcel@...tmann.org>
Subject: [PATCH 3.17 104/146] Bluetooth: 6lowpan: Set the peer IPv6 address correctly

3.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jukka Rissanen <jukka.rissanen@...ux.intel.com>

commit b2799cec22812f5f1aaaa57133df51876f685d84 upstream.

The peer IPv6 address contained wrong U/L bit in the EUI-64 part.

Signed-off-by: Jukka Rissanen <jukka.rissanen@...ux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/bluetooth/6lowpan.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -671,6 +671,14 @@ static struct l2cap_chan *chan_open(stru
 	return chan;
 }
 
+static void set_ip_addr_bits(u8 addr_type, u8 *addr)
+{
+	if (addr_type == BDADDR_LE_PUBLIC)
+		*addr |= 0x02;
+	else
+		*addr &= ~0x02;
+}
+
 static struct l2cap_chan *add_peer_chan(struct l2cap_chan *chan,
 					struct lowpan_dev *dev)
 {
@@ -693,6 +701,11 @@ static struct l2cap_chan *add_peer_chan(
 	memcpy(&peer->eui64_addr, (u8 *)&peer->peer_addr.s6_addr + 8,
 	       EUI64_ADDR_LEN);
 
+	/* IPv6 address needs to have the U/L bit set properly so toggle
+	 * it back here.
+	 */
+	set_ip_addr_bits(chan->dst_type, (u8 *)&peer->peer_addr.s6_addr + 8);
+
 	write_lock_irqsave(&devices_lock, flags);
 	INIT_LIST_HEAD(&peer->list);
 	peer_add(dev, peer);


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