| IEEE80211_GET_BUFFER(9) | Advanced driver interface | IEEE80211_GET_BUFFER(9) |
NAME¶
ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
SYNOPSIS¶
struct sk_buff * ieee80211_get_buffered_bc(struct ieee80211_hw * hw, struct ieee80211_vif * vif);
ARGUMENTS¶
hw
vif
struct ieee80211_vif pointer from the add_interface callback.
DESCRIPTION¶
Function for accessing buffered broadcast and multicast frames. If hardware/firmware does not implement buffering of broadcast/multicast frames when power saving is used, 802.11 code buffers them in the host memory. The low-level driver uses this function to fetch next buffered frame. In most cases, this is used when generating beacon frame.
RETURN¶
A pointer to the next buffered skb or NULL if no more buffered frames are available.
NOTE¶
buffered frames are returned only after DTIM beacon frame was generated with ieee80211_beacon_get and the low-level driver must thus call ieee80211_beacon_get first. ieee80211_get_buffered_bc returns NULL if the previous generated beacon was not DTIM, so the low-level driver does not need to check for DTIM beacons separately and should be able to use common code for all beacons.
AUTHOR¶
Johannes Berg <johannes@sipsolutions.net>
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |