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6lowpan: Change byte order when storing/accessing u16 tag

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The tag field should be stored and accessed using big endian byte order (as
intended in the specs). Or else, when displayed with a trafic analyser, such a
Wireshark, the field not properly displayed (e.g. 0x01 00 instead of 0x00 01,
and so on).

Signed-off-by: Tony Cheneau <tony.cheneau@amnesiak.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tony Cheneau 2012-07-11 06:51:15 +00:00 committed by David S. Miller
parent d4787a1543
commit 4576039ffc
1 changed files with 3 additions and 3 deletions
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6
net/ieee802154/6lowpan.c
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@ -302,7 +302,7 @@ static inline int lowpan_fetch_skb_u16(struct sk_buff *skb, u16 *val)
if (unlikely(!pskb_may_pull(skb, 2)))
return -EINVAL;
*val = skb->data[0] | (skb->data[1] << 8);
*val = (skb->data[0] << 8) | skb->data[1];
skb_pull(skb, 2);
return 0;
@ -1006,8 +1006,8 @@ lowpan_skb_fragmentation(struct sk_buff *skb)
/* first fragment header */
head[0] = LOWPAN_DISPATCH_FRAG1 | (payload_length & 0x7);
head[1] = (payload_length >> 3) & 0xff;
head[2] = tag & 0xff;
head[3] = tag >> 8;
head[2] = tag >> 8;
head[3] = tag & 0xff;
err = lowpan_fragment_xmit(skb, head, header_length, 0, 0);