From f333a15a3eaf831067f9bfed35f1bb5fe0670b9f Mon Sep 17 00:00:00 2001 From: Tony Cheneau Date: Mon, 25 Mar 2013 17:59:23 +0000 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- net/ieee802154/6lowpan.c | 4 ++++ 1 file changed, 4 insertions(+) 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); } -- 2.41.0