[PATCH net-next 05/15] 6lowpan: use short IEEE 802.15.4 addresses for broadcast destination
From: Tony Cheneau <hidden>
Date: 2012-10-23 04:09:47
It is intended that the IEEE 802.15.4 standard uses the 0xFFFF short address (2 bytes) for message broadcasting. Signed-off-by: Tony Cheneau <redacted> --- net/ieee802154/6lowpan.c | 21 +++++++++++++-------- 1 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 49d91df..8a2ee95 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c@@ -577,21 +577,26 @@ static int lowpan_header_create(struct sk_buff *skb, * this isn't implemented in mainline yet, so currently we assign 0xff */ { + mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA; + /* prepare wpan address data */ sa.addr_type = IEEE802154_ADDR_LONG; sa.pan_id = 0xff; - - da.addr_type = IEEE802154_ADDR_LONG; - da.pan_id = 0xff; - - memcpy(&(da.hwaddr), daddr, 8); memcpy(&(sa.hwaddr), saddr, 8); - mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA; + da.pan_id = 0xff; + /* if the destination address is the broadcast address, + use short address */ + if (lowpan_is_addr_broadcast(daddr)) { + da.addr_type = IEEE802154_ADDR_SHORT; + da.short_addr = IEEE802154_ADDR_BROADCAST; + } else { + da.addr_type = IEEE802154_ADDR_LONG; + memcpy(&(da.hwaddr), daddr, 8); - /* request acknowledgment when possible */ - if (!lowpan_is_addr_broadcast(daddr)) + /* request acknowledgment */ 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);
--
1.7.8.6
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