1IEEE80211_GET_BUFFER(9)    Advanced driver interface   IEEE80211_GET_BUFFER(9)
2
3
4

NAME

6       ieee80211_get_buffered_bc - accessing buffered broadcast and multicast
7       frames
8

SYNOPSIS

10       struct sk_buff * ieee80211_get_buffered_bc(struct ieee80211_hw * hw,
11                                                  struct ieee80211_vif * vif);
12

ARGUMENTS

14       hw
15           pointer as obtained from ieee80211_alloc_hw.
16
17       vif
18           struct ieee80211_vif pointer from the add_interface callback.
19

DESCRIPTION

21       Function for accessing buffered broadcast and multicast frames. If
22       hardware/firmware does not implement buffering of broadcast/multicast
23       frames when power saving is used, 802.11 code buffers them in the host
24       memory. The low-level driver uses this function to fetch next buffered
25       frame. In most cases, this is used when generating beacon frame.
26

RETURN

28       A pointer to the next buffered skb or NULL if no more buffered frames
29       are available.
30

NOTE

32       buffered frames are returned only after DTIM beacon frame was generated
33       with ieee80211_beacon_get and the low-level driver must thus call
34       ieee80211_beacon_get first.  ieee80211_get_buffered_bc returns NULL if
35       the previous generated beacon was not DTIM, so the low-level driver
36       does not need to check for DTIM beacons separately and should be able
37       to use common code for all beacons.
38

AUTHOR

40       Johannes Berg <johannes@sipsolutions.net>
41           Author.
42
44Kernel Hackers Manual 3.10         June 2019           IEEE80211_GET_BUFFER(9)
Impressum