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Update ieee80211_mhz2ieee to understand public safety bands and spectrum

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that can potentially be mapped to negative ieee #'s.

NB: before operation on the latter can be supported we need to cleanup
    various code that assumes ieee channel #'s are >= 0
This commit is contained in:
Sam Leffler 2005-11-15 05:56:32 +00:00
parent de66ac4427
commit 6f322b78de
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=152450
2 changed files with 24 additions and 9 deletions
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29
sys/net80211/ieee80211.c
View File

@ -233,33 +233,48 @@ ieee80211_ifdetach(struct ieee80211com *ic)
/*
* Convert MHz frequency to IEEE channel number.
*/
u_int
int
ieee80211_mhz2ieee(u_int freq, u_int flags)
{
#define IS_CHAN_IN_PUBLIC_SAFETY_BAND(_c) ((_c) > 4940 && (_c) < 4990)
if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
if (freq == 2484)
return 14;
if (freq < 2484)
return (freq - 2407) / 5;
return ((int) freq - 2407) / 5;
else
return 15 + ((freq - 2512) / 20);
} else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
return (freq - 5000) / 5;
if (IS_CHAN_IN_PUBLIC_SAFETY_BAND(freq))
return ((freq * 10) +
(((freq % 5) == 2) ? 5 : 0) - 49400) / 5;
if (freq <= 5000)
return (freq - 4000) / 5;
else
return (freq - 5000) / 5;
} else { /* either, guess */
if (freq == 2484)
return 14;
if (freq < 2484)
return (freq - 2407) / 5;
if (freq < 5000)
return 15 + ((freq - 2512) / 20);
return ((int) freq - 2407) / 5;
if (freq < 5000) {
if (IS_CHAN_IN_PUBLIC_SAFETY_BAND(freq))
return ((freq * 10) +
(((freq % 5) == 2) ? 5 : 0) - 49400)/5;
else if (freq > 4900)
return (freq - 4000) / 5;
else
return 15 + ((freq - 2512) / 20);
}
return (freq - 5000) / 5;
}
#undef IS_CHAN_IN_PUBLIC_SAFETY_BAND
}
/*
* Convert channel to IEEE channel number.
*/
u_int
int
ieee80211_chan2ieee(struct ieee80211com *ic, struct ieee80211_channel *c)
{
if (ic->ic_channels <= c && c <= &ic->ic_channels[IEEE80211_CHAN_MAX])

4
sys/net80211/ieee80211_var.h
View File

@ -286,8 +286,8 @@ void ieee80211_watchdog(struct ieee80211com *);
int ieee80211_rate2media(struct ieee80211com *, int,
enum ieee80211_phymode);
int ieee80211_media2rate(int);
u_int ieee80211_mhz2ieee(u_int, u_int);
u_int ieee80211_chan2ieee(struct ieee80211com *, struct ieee80211_channel *);
int ieee80211_mhz2ieee(u_int, u_int);
int ieee80211_chan2ieee(struct ieee80211com *, struct ieee80211_channel *);
u_int ieee80211_ieee2mhz(u_int, u_int);
int ieee80211_setmode(struct ieee80211com *, enum ieee80211_phymode);
enum ieee80211_phymode ieee80211_chan2mode(struct ieee80211com *,