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Fix HT40 co-ex scan for some pri/sec channel switches

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Secondary channel was compared incorrectly (-4/4 vs. actual channel
number) which broke matching neighboring 40 MHz BSSes and only the
no-beacons-on-secondary-channel rule was applied in practice. Once
sec_chan was fixed, this triggered another issue in this function where
both rules to switch pri/sec channels could end up getting applied in a
way that effectively canceled the switch.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2014-03-15 16:42:29 +02:00
parent 018ead4218
commit 49b74430d9
1 changed files with 2 additions and 1 deletions
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3
src/ap/hw_features.c
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@ -327,7 +327,7 @@ static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
int match; int match;
pri_chan = iface->conf->channel; pri_chan = iface->conf->channel;
sec_chan = iface->conf->secondary_channel * 4; sec_chan = pri_chan + iface->conf->secondary_channel * 4;
pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan); pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan);
if (iface->conf->secondary_channel > 0) if (iface->conf->secondary_channel > 0)
sec_freq = pri_freq + 20; sec_freq = pri_freq + 20;
@ -351,6 +351,7 @@ static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
"channel to get secondary channel with no Beacons " "channel to get secondary channel with no Beacons "
"from other BSSes"); "from other BSSes");
ieee80211n_switch_pri_sec(iface); ieee80211n_switch_pri_sec(iface);
return 1;
} }
/* /*