Correct several issues with rate set negotiation:

o add IEEE80211_F_JOIN flag to ieee80211_fix_rate to indicate a station
  is joining a BSS; this is used to control whether or not we over-write
  the basic rate bit in the calculated rate set
o fix ieee80211_fix_rate to honor IEEE80211_F_DODEL when IEEE80211_F_DONEGO
  is not specified (e.g. when joining an ibss network)
o on sta join always delete unusable rates from the negotiated rate set,
  this was being done only ibss networks but is also needed for 11g bss
  with mixed stations
o on sta join delete unusable rates from the bss node's rate set, not the
  scan table entry's rate set
o when calculating a rate set for new neighbors in an ibss caculate a
  negotiated rate set so drivers are not presented with rates they should
  not use

Submitted by:	Sepherosa Ziehau (w/ modifications)
Obtained from:	DragonFly
MFC after:	1 month

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_proto.h b/sys/net80211/ieee80211_proto.h
index 397da44..0182cd4 100644
--- a/sys/net80211/ieee80211_proto.h
+++ b/sys/net80211/ieee80211_proto.h
@@ -180,6 +180,7 @@ const struct ieee80211_aclator *ieee80211_aclator_get(const char *name);
 #define	IEEE80211_F_DOFRATE	0x00000002	/* use fixed rate */
 #define	IEEE80211_F_DONEGO	0x00000004	/* calc negotiated rate */
 #define	IEEE80211_F_DODEL	0x00000008	/* delete ignore rate */
+#define	IEEE80211_F_JOIN	0x00000010	/* sta joining our bss */
 int	ieee80211_fix_rate(struct ieee80211_node *, int);
 
 /*