Migrate the power-save functions to be overridable VAP methods.

This turns ieee80211_node_pwrsave(), ieee80211_sta_pwrsave() and
ieee80211_recv_pspoll() into methods.

The intent is to let drivers override these and tie into the power save
management pathway.

For ath(4), this is the beginning of forcing a node software queue to
stop and start as needed, as well as supporting "leaking" single frames
from the software queue to the hardware.

Right now, ieee80211_recv_pspoll() will attempt to transmit a single frame
to the hardware (whether it be a data frame on the power-save queue or
a NULL data frame) but the driver may have hardware/software queued frames
queued up.  This initial work is an attempt at providing the hooks required
to implement correct behaviour.

Allowing ieee80211_node_pwrsave() to be overridden allows the ath(4)
driver to pause and unpause the entire software queue for a given node.
It doesn't make sense to transmit anything whilst the node is asleep.

Please note that there are other corner cases to correctly handle -
specifically, setting the MORE data bit correctly on frames to a station,
as well as keeping the TIM updated.  Those particular issues can be
addressed later.

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_hostap.h b/sys/net80211/ieee80211_hostap.h
index 87f858d..e08c4a0 100644
--- a/sys/net80211/ieee80211_hostap.h
+++ b/sys/net80211/ieee80211_hostap.h
@@ -32,4 +32,10 @@
  */
 void	ieee80211_hostap_attach(struct ieee80211com *);
 void	ieee80211_hostap_detach(struct ieee80211com *);
+
+/*
+ * This method can be overridden
+ */
+void ieee80211_recv_pspoll(struct ieee80211_node *, struct mbuf *);
+
 #endif /* !_NET80211_IEEE80211_HOSTAP_H_ */