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authorAlexander Aring <alex.aring@gmail.com>2015-06-02 16:55:17 +0300
committerMarcel Holtmann <marcel@holtmann.org>2015-06-02 18:09:35 +0300
commit1caf6f476e90f592c2502a82bdef423cf950d011 (patch)
tree20b5c00b851fc0ff104b92cadb6dbcc07bbca46d /net/ieee802154
parentd6d244d4df91ee4b468233050542c7482d705e69 (diff)
downloadlinux-1caf6f476e90f592c2502a82bdef423cf950d011.tar.xz
ieee802154: 6lowpan: set ackreq when needed
This patch sets the acknowledge request bit inside the 802.15.4 mac header when frame retries is 0 or above. The other frame retries value which is -1 indicates that the transmitter doesn't care about an acknowledge frame which will be ignored after transmitting if the node sends anyway an ack frame after receiving. This is currently unnecessary traffic if the max frame retries parameter is -1. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/ieee802154')
-rw-r--r--net/ieee802154/6lowpan/tx.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ieee802154/6lowpan/tx.c b/net/ieee802154/6lowpan/tx.c
index 98acf7319754..2597abbf7f4b 100644
--- a/net/ieee802154/6lowpan/tx.c
+++ b/net/ieee802154/6lowpan/tx.c
@@ -190,6 +190,7 @@ err:
static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
{
+ struct wpan_dev *wpan_dev = lowpan_dev_info(dev)->real_dev->ieee802154_ptr;
struct ieee802154_addr sa, da;
struct ieee802154_mac_cb *cb = mac_cb_init(skb);
struct lowpan_addr_info info;
@@ -207,7 +208,7 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
/* prepare wpan address data */
sa.mode = IEEE802154_ADDR_LONG;
- sa.pan_id = lowpan_dev_info(dev)->real_dev->ieee802154_ptr->pan_id;
+ sa.pan_id = wpan_dev->pan_id;
sa.extended_addr = ieee802154_devaddr_from_raw(saddr);
/* intra-PAN communications */
@@ -223,7 +224,7 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
} else {
da.mode = IEEE802154_ADDR_LONG;
da.extended_addr = ieee802154_devaddr_from_raw(daddr);
- cb->ackreq = true;
+ cb->ackreq = wpan_dev->frame_retries >= 0;
}
return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev,