First cut at half/quarter-rate 11a channel support (e.g. for use

in the Public Safety Band):
o add channel flags to identify half/quarter-rate operation
o add rate sets (need to check spec on 4Mb/s in 1/4 rate)
o add if_media definitions for new rates
o split net80211 channel setup out into ieee80211_chan_init
o fixup ieee80211_mhz2ieee and ieee80211_ieee2mhz to understand half/quarter
  rate channels: note we temporarily use a nonstandard/hack numbering that
  avoids overlap with 2.4G channels because we don't (yet) have enough
  state to identify and/or map overlapping channel sets
o fixup ieee80211_ifmedia_init so it can be called post attach and will
  recalculate the channel list and associated state; this enables changing
  channel-related state like the regulatory domain after attach (will be
  needed for 802.11d support too)
o add ieee80211_get_suprates to return a reference to the supported rate
  set for a given channel
o add 3, 4.5, and 27 MB/s tx rates to rate <-> media conversion routines
o const-poison channel arg to ieee80211_chan2mode

1 files changed, 2 insertions, 3 deletions

diff --git a/sys/net80211/ieee80211_node.c b/sys/net80211/ieee80211_node.c
index d9c88c9..700d4b0 100644
--- a/sys/net80211/ieee80211_node.c
+++ b/sys/net80211/ieee80211_node.c
@@ -230,7 +230,7 @@ ieee80211_set_chan(struct ieee80211com *ic,
 	if (chan == IEEE80211_CHAN_ANYC)	/* XXX while scanning */
 		chan = ic->ic_curchan;
 	ni->ni_chan = chan;
-	ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)];
+	ni->ni_rates = *ieee80211_get_suprates(ic, chan);
 }
 
 /*
@@ -344,8 +344,7 @@ ieee80211_next_scan(struct ieee80211com *ic)
 			 * XXX drivers should do this as needed,
 			 * XXX for now maintain compatibility
 			 */
-			ic->ic_bss->ni_rates =
-				ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)];
+			ic->ic_bss->ni_rates = *ieee80211_get_suprates(ic, chan);
 			ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
 			return 1;
 		}