Clarify/fix handling of the current channel:

o add ic_curchan and use it uniformly for specifying the current
  channel instead of overloading ic->ic_bss->ni_chan (or in some
  drivers ic_ibss_chan)
o add ieee80211_scanparams structure to encapsulate scanning-related
  state captured for rx frames
o move rx beacon+probe response frame handling into separate routines
o change beacon+probe response handling to treat the scan table
  more like a scan cache--look for an existing entry before adding
  a new one; this combined with ic_curchan use corrects handling of
  stations that were previously found at a different channel
o move adhoc neighbor discovery by beacon+probe response frames to
  a new ieee80211_add_neighbor routine

Reviewed by:	avatar
Tested by:	avatar, Michal Mertl
MFC after:	2 weeks

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_var.h b/sys/net80211/ieee80211_var.h
index 2ef0e54..c552d36 100644
--- a/sys/net80211/ieee80211_var.h
+++ b/sys/net80211/ieee80211_var.h
@@ -136,6 +136,7 @@ struct ieee80211com {
 	struct bpf_if		*ic_rawbpf;	/* packet filter structure */
 	struct ieee80211_node	*ic_bss;	/* information for this node */
 	struct ieee80211_channel *ic_ibss_chan;
+	struct ieee80211_channel *ic_curchan;	/* current channel */
 	int			ic_fixed_rate;	/* index to ic_sup_rates[] */
 	u_int16_t		ic_rtsthreshold;
 	u_int16_t		ic_fragthreshold;