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authorTony Cheneau <tony.cheneau@amnesiak.org>2013-03-25 17:59:23 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-26 12:37:55 -0400
commitf333a15a3eaf831067f9bfed35f1bb5fe0670b9f (patch)
treea7dc580f5f2941c179d179c23e4724ebd6a3b341 /net/ieee802154
parentf5c20f58d950002a4a5a77f60484a51e5af6498c (diff)
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6lowpan: always enable link-layer acknowledgments
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>
Diffstat (limited to 'net/ieee802154')
-rw-r--r--net/ieee802154/6lowpan.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 9f53904b526..e7f61de2459 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -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);
}