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Fix 1/2 and 1/4 width channel handling:

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o only include 1/2 and 1/4 width channels when they are specified in the
  regulatory database description; previously we treated them as if they
  were part of the band and blindly added them for 11a/g
o check the channel list returned in the devcaps to identify whether a
  device supports 1/2 or 1/4 width channels on a band; this might be
  better brought out as a capability bit to avoid filling the channel
  list w/ 1/2 and 1/4 width channels but then cards that only support
  these channels in a range of frequencies could not be described (though
  right now we don't check frequency range only band)
This commit is contained in:
Sam Leffler 2009-01-28 19:15:52 +00:00
parent bb5d3b71d3
commit d6bf86af1e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=187841
1 changed files with 38 additions and 30 deletions
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68
sbin/ifconfig/ifieee80211.c
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@ -1789,6 +1789,19 @@ chanlookup(const struct ieee80211_channel chans[], int nchans,
return NULL;
}
static int
chanfind(const struct ieee80211_channel chans[], int nchans, int flags)
{
int i;
for (i = 0; i < nchans; i++) {
const struct ieee80211_channel *c = &chans[i];
if ((c->ic_flags & flags) == flags)
return 1;
}
return 0;
}
static void
regdomain_addchans(struct ieee80211req_chaninfo *ci,
const netband_head *bands,
@ -1799,9 +1812,15 @@ regdomain_addchans(struct ieee80211req_chaninfo *ci,
const struct netband *nb;
const struct freqband *b;
struct ieee80211_channel *c, *prev;
int freq, channelSep;
int freq, channelSep, hasHalfChans, hasQuarterChans;
channelSep = (chanFlags & IEEE80211_CHAN_2GHZ) ? 0 : 40;
hasHalfChans = chanfind(avail->ic_chans, avail->ic_nchans,
IEEE80211_CHAN_HALF |
(chanFlags & (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ)));
hasQuarterChans = chanfind(avail->ic_chans, avail->ic_nchans,
IEEE80211_CHAN_QUARTER |
(chanFlags & (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ)));
LIST_FOREACH(nb, bands, next) {
b = nb->band;
if (verbose)
@ -1812,28 +1831,31 @@ regdomain_addchans(struct ieee80211req_chaninfo *ci,
uint32_t flags = nb->flags | b->flags;
/* check if device can operate on this frequency */
if (chanlookup(avail->ic_chans, avail->ic_nchans, freq, chanFlags) == NULL) {
/*
* XXX GSM frequency mapping is handled in the kernel
* so we cannot find them in the calibration table;
* just construct the list and the kernel will reject
* if it's wrong.
*/
if (chanlookup(avail->ic_chans, avail->ic_nchans, freq, chanFlags) == NULL &&
(flags & IEEE80211_CHAN_GSM) == 0) {
if (verbose)
printf("%u: skip, flags 0x%x not available\n", freq, chanFlags);
continue;
}
/*
* NB: don't enforce 1/2 and 1/4 rate channels being
* specified in the device's calibration list for
* 900MHz cards because most are not self-identifying.
*/
if ((flags & IEEE80211_CHAN_HALF) &&
((chanFlags & IEEE80211_CHAN_HALF) == 0 &&
(flags & IEEE80211_CHAN_GSM) == 0)) {
if ((flags & IEEE80211_CHAN_HALF) && !hasHalfChans) {
if (verbose)
printf("%u: skip, device does not support half-rate channels\n", freq);
printf("%u: skip, device does not "
"support half-rate channel\n",
freq);
continue;
}
if ((flags & IEEE80211_CHAN_QUARTER) &&
((chanFlags & IEEE80211_CHAN_QUARTER) == 0 &&
(flags & IEEE80211_CHAN_GSM) == 0)) {
!hasQuarterChans) {
if (verbose)
printf("%u: skip, device does not support quarter-rate channels\n", freq);
printf("%u: skip, device does not "
"support quarter-rate channel\n",
freq);
continue;
}
if ((flags & IEEE80211_CHAN_HT20) &&
@ -1932,26 +1954,12 @@ regdomain_makechannels(
if (!LIST_EMPTY(&rd->bands_11b))
regdomain_addchans(ci, &rd->bands_11b, reg,
IEEE80211_CHAN_B, &dc->dc_chaninfo);
if (!LIST_EMPTY(&rd->bands_11g)) {
if (!LIST_EMPTY(&rd->bands_11g))
regdomain_addchans(ci, &rd->bands_11g, reg,
IEEE80211_CHAN_G, &dc->dc_chaninfo);
regdomain_addchans(ci, &rd->bands_11g, reg,
IEEE80211_CHAN_G | IEEE80211_CHAN_HALF,
&dc->dc_chaninfo);
regdomain_addchans(ci, &rd->bands_11g, reg,
IEEE80211_CHAN_G | IEEE80211_CHAN_QUARTER,
&dc->dc_chaninfo);
}
if (!LIST_EMPTY(&rd->bands_11a)) {
if (!LIST_EMPTY(&rd->bands_11a))
regdomain_addchans(ci, &rd->bands_11a, reg,
IEEE80211_CHAN_A, &dc->dc_chaninfo);
regdomain_addchans(ci, &rd->bands_11a, reg,
IEEE80211_CHAN_A | IEEE80211_CHAN_HALF,
&dc->dc_chaninfo);
regdomain_addchans(ci, &rd->bands_11a, reg,
IEEE80211_CHAN_A | IEEE80211_CHAN_QUARTER,
&dc->dc_chaninfo);
}
if (!LIST_EMPTY(&rd->bands_11na)) {
regdomain_addchans(ci, &rd->bands_11na, reg,
IEEE80211_CHAN_A | IEEE80211_CHAN_HT20,