netdev - [PATCH net-next 2/6] 6lowpan: fix udp compress ordering

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Message-Id: <1384444132-1427-3-git-send-email-alex.aring@gmail.com>
Date:	Thu, 14 Nov 2013 16:48:48 +0100
From:	Alexander Aring <alex.aring@...il.com>
To:	alex.bluesman.smirnov@...il.com
Cc:	linux-zigbee-devel@...ts.sourceforge.net, werner@...esberger.net,
	jukka.rissanen@...ux.intel.com, dbaryshkov@...il.com,
	netdev@...r.kernel.org, Alexander Aring <alex.aring@...il.com>
Subject: [PATCH net-next 2/6] 6lowpan: fix udp compress ordering

In case ((ntohs(uh->source) & LOWPAN_NHC_UDP_8BIT_MASK) the order of
uncompression is wrong. It's always first source port then destination
port as second.

See:
http://tools.ietf.org/html/rfc6282#section-4.3.3

"Fields carried in-line (in part or in whole) appear in the same order
as they do in the UDP header format"

Signed-off-by: Alexander Aring <alex.aring@...il.com>
---
 net/ieee802154/6lowpan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 8633379..ad6755a 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -359,8 +359,8 @@ lowpan_compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb)
 			LOWPAN_NHC_UDP_8BIT_PORT) {
 		pr_debug("UDP header: remove 8 bits of source\n");
 		**hc06_ptr = LOWPAN_NHC_UDP_CS_P_10;
-		memcpy(*hc06_ptr + 1, &uh->dest, 2);
-		*(*hc06_ptr + 3) = (u8)(uh->source - LOWPAN_NHC_UDP_8BIT_PORT);
+		*(*hc06_ptr + 1) = (u8)(uh->source - LOWPAN_NHC_UDP_8BIT_PORT);
+		memcpy(*hc06_ptr + 2, &uh->dest, 2);
 		*hc06_ptr += 4;
 	} else {
 		pr_debug("UDP header: can't compress\n");
-- 
1.8.4.2

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