diff options
| author | Tony Cheneau <tony.cheneau@amnesiak.org> | 2013-03-25 18:59:25 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-26 17:37:56 +0100 |
| commit | 58ef67c318ac1e83a7a333f66403d777e7447461 (patch) | |
| tree | 51e026666b29d25ab5c1e730dbf485eac14d57ee /net/ieee802154 | |
| parent | mac802154: turn on ACK when enabled by the upper layers (diff) | |
| download | linux-58ef67c318ac1e83a7a333f66403d777e7447461.tar.xz linux-58ef67c318ac1e83a7a333f66403d777e7447461.zip | |
6lowpan: use short IEEE 802.15.4 addresses for broadcast destination
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>
Diffstat (limited to 'net/ieee802154')
| -rw-r--r-- | net/ieee802154/6lowpan.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c index e7f61de2459a..0eebb960e11d 100644 --- a/net/ieee802154/6lowpan.c +++ b/net/ieee802154/6lowpan.c @@ -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); |