ieee80211_get_buffered_bc
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## 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.

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