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ieee802154: document the skb->cb usage clearly.

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Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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Dmitry Eremin-Solenikov 2009-08-19 18:53:39 +04:00
parent 3a5209e3b2
commit a0aea57786
1 changed files with 7 additions and 2 deletions
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9
Documentation/networking/ieee802154.txt
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@ -56,8 +56,12 @@ HardMAC
See the header include/net/ieee802154_netdev.h. You have to implement Linux See the header include/net/ieee802154_netdev.h. You have to implement Linux
net_device, with .type = ARPHRD_IEEE802154. Data is exchanged with socket family net_device, with .type = ARPHRD_IEEE802154. Data is exchanged with socket family
code via plain sk_buffs. The control block of sk_buffs will contain additional code via plain sk_buffs. On skb reception skb->cb must contain additional
info as described in the struct ieee802154_mac_cb. info as described in the struct ieee802154_mac_cb. During packet transmission
the skb->cb is used to provide additional data to device's header_ops->create
function. Be aware, that this data can be overriden later (when socket code
submits skb to qdisc), so if you need something from that cb later, you should
store info in the skb->data on your own.
To hook the MLME interface you have to populate the ml_priv field of your To hook the MLME interface you have to populate the ml_priv field of your
net_device with a pointer to struct ieee802154_mlme_ops instance. All fields are net_device with a pointer to struct ieee802154_mlme_ops instance. All fields are
@ -73,3 +77,4 @@ We are going to provide intermediate layer implementing IEEE 802.15.4 MAC
in software. This is currently WIP. in software. This is currently WIP.
See header include/net/mac802154.h and several drivers in drivers/ieee802154/. See header include/net/mac802154.h and several drivers in drivers/ieee802154/.