78 lines
2.4 KiB
Diff
78 lines
2.4 KiB
Diff
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From: Matthias Schiffer <mschiffer@universe-factory.net>
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Date: Mon, 27 Jul 2015 20:42:50 +0200
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Subject: hostapd: prevent channel switch for 5GHz
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hostapd would switch the primary and secondary channel on 5GHz networks in
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certain circumstances, completely breaking the adhoc interfaces of the WLAN
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adapter (they would lose their configuration).
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As a temporary fix, disable this channel switch function.
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diff --git a/package/network/services/hostapd/patches/472-no_channel_switch.patch b/package/network/services/hostapd/patches/472-no_channel_switch.patch
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new file mode 100644
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index 0000000..046969b
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--- /dev/null
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+++ b/package/network/services/hostapd/patches/472-no_channel_switch.patch
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@@ -0,0 +1,61 @@
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+--- a/src/ap/hw_features.c
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++++ b/src/ap/hw_features.c
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+@@ -339,58 +339,6 @@ static int ieee80211n_check_40mhz_5g(str
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+ else
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+ sec_freq = pri_freq - 20;
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+
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+- /*
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+- * Switch PRI/SEC channels if Beacons were detected on selected SEC
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+- * channel, but not on selected PRI channel.
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+- */
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+- pri_bss = sec_bss = 0;
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+- for (i = 0; i < scan_res->num; i++) {
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+- struct wpa_scan_res *bss = scan_res->res[i];
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+- if (bss->freq == pri_freq)
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+- pri_bss++;
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+- else if (bss->freq == sec_freq)
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+- sec_bss++;
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+- }
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+- if (sec_bss && !pri_bss) {
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+- wpa_printf(MSG_INFO, "Switch own primary and secondary "
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+- "channel to get secondary channel with no Beacons "
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+- "from other BSSes");
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+- ieee80211n_switch_pri_sec(iface);
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+- return 1;
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+- }
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+-
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+- /*
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+- * Match PRI/SEC channel with any existing HT40 BSS on the same
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+- * channels that we are about to use (if already mixed order in
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+- * existing BSSes, use own preference).
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+- */
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+- match = 0;
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+- for (i = 0; i < scan_res->num; i++) {
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+- struct wpa_scan_res *bss = scan_res->res[i];
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+- ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
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+- if (pri_chan == bss_pri_chan &&
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+- sec_chan == bss_sec_chan) {
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+- match = 1;
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+- break;
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+- }
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+- }
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+- if (!match) {
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+- for (i = 0; i < scan_res->num; i++) {
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+- struct wpa_scan_res *bss = scan_res->res[i];
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+- ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan,
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+- &bss_sec_chan);
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+- if (pri_chan == bss_sec_chan &&
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+- sec_chan == bss_pri_chan) {
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+- wpa_printf(MSG_INFO, "Switch own primary and "
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+- "secondary channel due to BSS "
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+- "overlap with " MACSTR,
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+- MAC2STR(bss->bssid));
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+- ieee80211n_switch_pri_sec(iface);
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+- break;
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+- }
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+- }
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+- }
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+-
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+ return 1;
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+ }
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+
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