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| author | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2009-08-19 16:53:39 +0200 |
|---|---|---|
| committer | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2009-08-19 21:08:19 +0200 |
| commit | a0aea57786fe9c6b62b1a4f28409582520fa494f (patch) | |
| tree | 5170efad00b83199cb0ef41edfe2983413359cb7 /Documentation/networking/ieee802154.txt | |
| parent | trace_skb: fix build when CONFIG_NET is not enabled (diff) | |
| download | linux-a0aea57786fe9c6b62b1a4f28409582520fa494f.tar.xz linux-a0aea57786fe9c6b62b1a4f28409582520fa494f.zip | |
ieee802154: document the skb->cb usage clearly.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Diffstat (limited to 'Documentation/networking/ieee802154.txt')
| -rw-r--r-- | Documentation/networking/ieee802154.txt | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/networking/ieee802154.txt b/Documentation/networking/ieee802154.txt index 1c0c82c8bc7d..23c995e64032 100644 --- a/Documentation/networking/ieee802154.txt +++ b/Documentation/networking/ieee802154.txt @@ -56,8 +56,12 @@ HardMAC 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 -code via plain sk_buffs. The control block of sk_buffs will contain additional -info as described in the struct ieee802154_mac_cb. +code via plain sk_buffs. On skb reception skb->cb must contain additional +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 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. See header include/net/mac802154.h and several drivers in drivers/ieee802154/. + |