From dbaa421297b3576dbaf121faa13894139e3a39ec Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Fri, 27 Mar 2009 21:14:59 +0000
Subject: [PATCH] wifi: fix hostapd + autochannel

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15055 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 package/base-files/files/sbin/wifi          | 34 +++++++++++++++++++++
 package/hostapd/files/hostapd.sh            | 26 +++++++---------
 package/mac80211/files/lib/wifi/mac80211.sh |  1 +
 3 files changed, 46 insertions(+), 15 deletions(-)

diff --git a/package/base-files/files/sbin/wifi b/package/base-files/files/sbin/wifi
index e0aca6315..ec231457e 100755
--- a/package/base-files/files/sbin/wifi
+++ b/package/base-files/files/sbin/wifi
@@ -34,6 +34,40 @@ bridge_interface() {(
 	[ "$iftype" = bridge ] && config_get "$cfg" ifname
 )}
 
+wifi_fixup_hwmode() {
+	local device="$1"
+	local default="$2"
+	local hwmode hwmode_11n
+
+	config_get channel "$device" channel
+	config_get hwmode "$device" hwmode
+	case "$hwmode" in
+		11a) hwmode=a;;
+		11b) hwmode=b;;
+		11g) hwmode=g;;
+		11n*)
+			hwmode_11n="${hwmode##11n}"
+			case "$hwmode" in
+				a|g) ;;
+				default) hwmode_11n="$default"
+			esac
+			config_set "$device" hwmode_11n "$hwmode_11n"
+		;;
+		*)
+			hwmode=
+			if [ "${channel:-0}" -gt 0 ]; then 
+				if [ "${channel:-0}" -gt 14 ]; then
+					hwmode=a
+				else
+					hwmode=g
+				fi
+			else
+				hwmode="$default"
+			fi
+		;;
+	esac
+	config_set "$device" hwmode "$hwmode"
+}
 
 wifi_updown() {
 	[ enable = "$1" ] && wifi_updown disable "$2"
diff --git a/package/hostapd/files/hostapd.sh b/package/hostapd/files/hostapd.sh
index afd72fa1a..0008a22fb 100644
--- a/package/hostapd/files/hostapd.sh
+++ b/package/hostapd/files/hostapd.sh
@@ -77,32 +77,28 @@ hostapd_setup_vif() {
 	config_get channel "$device" channel
 	config_get hwmode "$device" hwmode
 	config_get country "$device" country
-	case "$hwmode" in
-		11a) hwmode=a;;
-		11b) hwmode=b;;
-		11g) hwmode=g;;
-		11n)
-			hwmode=g
-			append hostapd_cfg "ieee80211n=1" "$N"
+	[ "$channel" = auto ] && channel=
+	[ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
+	[ -n "$hwmode" ] && {
+		config_get hwmode_11n "$device" hwmode_11n
+		[ -n "$hwmode_11n" ] && {
+			hwmode="$hwmode_11n"
 			config_get ht_capab "$device" ht_capab
-		;;
-		*)
-			hwmode=
-			[ "$channel" -gt 14 ] && hwmode=a
-		;;
-	esac
+		}
+	}
 	cat > /var/run/hostapd-$ifname.conf <<EOF
 ctrl_interface=/var/run/hostapd-$ifname
 driver=$driver
 interface=$ifname
-hw_mode=${hwmode:-g}
-channel=$channel
+${hwmode:+hw_mode=$hwmode}
+${channel:+channel=$channel}
 ${bridge:+bridge=$bridge}
 ssid=$ssid
 debug=0
 wpa=$wpa
 ${crypto:+wpa_pairwise=$crypto}
 ${country:+country_code=$country}
+${hwmode_11n:+ieee80211n=1}
 ${ht_capab:+ht_capab=$ht_capab}
 $hostapd_cfg
 EOF
diff --git a/package/mac80211/files/lib/wifi/mac80211.sh b/package/mac80211/files/lib/wifi/mac80211.sh
index 47be5807b..2721e4d7c 100644
--- a/package/mac80211/files/lib/wifi/mac80211.sh
+++ b/package/mac80211/files/lib/wifi/mac80211.sh
@@ -54,6 +54,7 @@ enable_mac80211() {
 
 	local first=1
 	local mesh_idx=0
+	wifi_fixup_hwmode "$device" "g"
 	for vif in $vifs; do
 		ifconfig "$ifname" down 2>/dev/null
 		config_get ifname "$vif" ifname