Add a channel bandwidth selector to the setup screen.

Required for 900mhz devices to be supported due to band size.

This can also be useful for allowing more devices to fit into the same amount of RF space as nodes may often not need full 20mhz wide channels.

2.4ghz while using standard BBHN SSID is restricted to 20mhz for compatibility.

ref BBHN->ticket:50

files/etc/config.ap/_setup

@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 

files/etc/config.ap/_setup.default

@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 

files/etc/config.ap/wireless

@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
 	option distance	<wifi_distance>
 
 config wifi-iface

files/etc/config.mesh/_setup

@@ -5,6 +5,7 @@ wifi_ssid = BroadbandHamnet-v2
 wifi_mode = adhoc
 wifi_txpower = 19
 wifi_channel = 1
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_country = 00
 

files/etc/config.mesh/_setup.default

@@ -5,6 +5,7 @@ wifi_ssid = BroadbandHamnet-v2
 wifi_mode = adhoc
 wifi_txpower = 19
 wifi_channel = 1
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_country = 00
 

files/etc/config.mesh/wireless

@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
         option distance <wifi_distance>
         option country <wifi_country>
 

files/etc/config.mesh_ap/_setup

@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 

files/etc/config.mesh_ap/_setup.default

@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 

files/etc/config.mesh_ap/wireless

@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
 	option distance	<wifi_distance>
 
 config wifi-iface

files/etc/config.router/wireless

@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
 	option disabled 1
 
 config wifi-iface

files/www/cgi-bin/channelmaps.pm

@@ -139,6 +139,25 @@ sub rf_channels_list
     }
 }
 
+sub is_wifi_chanbw_valid
+{
+    my ($wifi_chanbw,$wifi_ssid) = @_;
+    my $boardinfo=hardware_info();
+    if ( ( exists($boardinfo->{'rfband'}) ) && ( $boardinfo->{'rfband'} == "2400" ) && ( $wifi_chanbw != 20 ) )
+    {
+        if ( (( length $wifi_ssid >= 33 ) || ( length $wifi_ssid == 0 )) || ( $wifi_ssid =~ /BroadBandHamnet-v.*/i ))
+        {
+            # 2.4ghz and default ssid not 20mhz wide -- Invalid chan_bw
+            return 0;
+        } else {
+            # chan_bw valid
+            return 1;
+        }
+    }
+    # Not 2.4ghz or device is unknown, trust the user submission.
+    return 1;
+}
+
 #weird uhttpd/busybox error requires a 1 at the end of this file
 1
 

files/www/cgi-bin/setup

@@ -179,6 +179,12 @@ if($parms{button_save})
         push (@errors, "invalid WiFi channel")
     }
 
+    if ( !is_wifi_chanbw_valid($wifi_chanbw,$wifi_ssid) )
+    {
+        push (@errors, "Invalid WiFi channel width");
+        $wifi_chanbw = 20;
+    }
+
     push (@errors, "invalid WiFi distance") if $wifi_distance < 0 or $wifi_distance =~ /\D/;
 
     $wifi_country_validated=0;
@@ -523,6 +529,15 @@ if($wifi_proto ne "disabled")
 	push @hidden, "<input type=hidden name=wifi_channel value='$wifi_channel'>";
     }
 
+    {
+        print "<tr><td>Channel Width</td>\n";
+        print "<td><select name=wifi_chanbw>\n";
+        selopt("20 MHz","20",$wifi_chanbw);
+        selopt("10 MHz","10",$wifi_chanbw);
+        selopt("5 MHz","5",$wifi_chanbw);
+        print "</select></td></tr>\n";
+    }
+
     if ($config ne "mesh")
     {
         print "<tr><td>Country</td>\n";