[PATCH net-next 05/15] 6lowpan: use short IEEE 802.15.4 addresses for broadcast destination
flat view
STALE5097d
From: Tony Cheneau <hidden>
Date: 2012-10-23 04:09:47
Subsystem:
ieee 802.15.4 subsystem, networking [general], the rest · Maintainers:
Alexander Aring, Stefan Schmidt, Miquel Raynal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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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