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
           pointer as obtained from ieee80211_alloc_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 AT sipsolutions.net>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   IEEE80211_GET_BUFFER(9)