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6lowpan: always enable link-layer acknowledgments

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This feature is especially important when using fragmentation, because
the reassembly mechanism cannot recover from the loss of a fragment.

Note that some hardware ignore this flag and not will not transmit
acknowledgments even if this is set.

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 2013-03-25 17:59:23 +00:00 committed by David S. Miller
parent f5c20f58d9
commit f333a15a3e
1 changed files with 4 additions and 0 deletions
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4
net/ieee802154/6lowpan.c
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@ -584,6 +584,10 @@ static int lowpan_header_create(struct sk_buff *skb,
mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
/* request acknowledgment when possible */
if (!lowpan_is_addr_broadcast(daddr))
mac_cb(skb)->flags |= MAC_CB_FLAG_ACKREQ;
return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev,
type, (void *)&da, (void *)&sa, skb->len);
}