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, 6 insertions, 0 deletions

diff --git a/sys/net80211/_ieee80211.h b/sys/net80211/_ieee80211.h
index 0872c5d..4eb522c 100644
--- a/sys/net80211/_ieee80211.h
+++ b/sys/net80211/_ieee80211.h
@@ -123,6 +123,8 @@ struct ieee80211_channel {
 #define	IEEE80211_CHAN_PASSIVE	0x0200	/* Only passive scan allowed */
 #define	IEEE80211_CHAN_DYN	0x0400	/* Dynamic CCK-OFDM channel */
 #define	IEEE80211_CHAN_GFSK	0x0800	/* GFSK channel (FHSS PHY) */
+#define	IEEE80211_CHAN_HALF	0x4000	/* Half rate channel */
+#define	IEEE80211_CHAN_QUARTER	0x8000	/* Quarter rate channel */
 
 /*
  * Useful combinations of channel characteristics.
@@ -175,6 +177,10 @@ struct ieee80211_channel {
 	(((_c)->ic_flags & IEEE80211_CHAN_CCK) != 0)
 #define	IEEE80211_IS_CHAN_GFSK(_c) \
 	(((_c)->ic_flags & IEEE80211_CHAN_GFSK) != 0)
+#define	IEEE80211_IS_CHAN_HALF(_c) \
+	(((_c)->ic_flags & IEEE80211_CHAN_HALF) != 0)
+#define	IEEE80211_IS_CHAN_QUARTER(_c) \
+	(((_c)->ic_flags & IEEE80211_CHAN_QUARTER) != 0)
 
 /* ni_chan encoding for FH phy */
 #define	IEEE80211_FH_CHANMOD	80