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6lowpan: use short IEEE 802.15.4 addresses for broadcast destination

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The IEEE 802.15.4 standard uses the 0xFFFF short address (2 bytes) for message
broadcasting.

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 17:59:25 +00:00 committed by David S. Miller
parent cf692061d0
commit 58ef67c318
1 changed files with 15 additions and 8 deletions
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23
net/ieee802154/6lowpan.c
View file

@ -572,21 +572,28 @@ 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 the
* corresponding 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);