1IEEE80211_GET_BUFFER(9)    Advanced driver interface   IEEE80211_GET_BUFFER(9)
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NAME

6       ieee80211_get_buffered_bc - accessing buffered broadcast and multicast
7       frames
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SYNOPSIS

10       struct sk_buff * ieee80211_get_buffered_bc(struct ieee80211_hw * hw,
11                                                  struct ieee80211_vif * vif);
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ARGUMENTS

14       hw
15           pointer as obtained from ieee80211_alloc_hw.
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17       vif
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19           struct ieee80211_vif pointer from the add_interface callback.
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DESCRIPTION

22       Function for accessing buffered broadcast and multicast frames. If
23       hardware/firmware does not implement buffering of broadcast/multicast
24       frames when power saving is used, 802.11 code buffers them in the host
25       memory. The low-level driver uses this function to fetch next buffered
26       frame. In most cases, this is used when generating beacon frame. This
27       function returns a pointer to the next buffered skb or NULL if no more
28       buffered frames are available.
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NOTE

31       buffered frames are returned only after DTIM beacon frame was generated
32       with ieee80211_beacon_get and the low-level driver must thus call
33       ieee80211_beacon_get first.  ieee80211_get_buffered_bc returns NULL if
34       the previous generated beacon was not DTIM, so the low-level driver
35       does not need to check for DTIM beacons separately and should be able
36       to use common code for all beacons.
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AUTHOR

39       Johannes Berg <johannes@sipsolutions.net>
40           Author.
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43Kernel Hackers Manual 2.6.       November 2011         IEEE80211_GET_BUFFER(9)
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