wireless: only advertise supported modes; closes #377

src/etc/inc/interfaces.inc

@@ -440,6 +440,25 @@ function interface_qinq2_configure(&$qinq, $fd, $macaddr) {
 	return $vlanif;
 }
 
+function interfaces_test_wireless_capability($if, $cap)
+{
+	$caps = array('hostap' => 'HOSTAP', 'adhoc' => 'IBSS');
+
+	if (!isset($caps[$cap])) {
+		return false;
+	}
+
+	exec(sprintf('/sbin/ifconfig %s list caps', escapeshellarg($if)), $lines);
+
+	foreach ($lines as $line) {
+		if (preg_match("/^drivercaps=.*<.*{$caps[$cap]}.*>$/", $line)) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
 function interfaces_create_wireless_clones() {
 	global $config;
 

src/www/guiconfig.inc

@@ -147,8 +147,11 @@ $wkports = array(
 	69 => "TFTP",
 	5900 => "VNC");
 
-$wlan_modes = array("bss" => "Infrastructure (BSS)", "adhoc" => "Ad-hoc (IBSS)",
-	"hostap" => "Access Point");
+$wlan_modes = array(
+	'bss' => 'Infrastructure (BSS)',
+	'adhoc' => 'Ad-hoc (IBSS)',
+	'hostap' => 'Access Point'
+);
 
 function do_input_validation($postdata, $reqdfields, $reqdfieldsn, &$input_errors)
 {

src/www/interfaces.php

@@ -3304,8 +3304,12 @@ $types6 = array("none" => gettext("None"), "staticv6" => gettext("Static IPv6"),
 												<td class="vtable">
 													<select name="mode" class="selectpicker" data-style="btn-default" id="mode">
 														<option <?php if ($pconfig['mode'] == 'bss') echo "selected=\"selected\"";?> value="bss"><?=gettext("Infrastructure (BSS)"); ?></option>
+<?php if (interfaces_test_wireless_capability(get_real_interface($wancfg['if']), 'adhoc')): ?>
 														<option <?php if ($pconfig['mode'] == 'adhoc') echo "selected=\"selected\"";?> value="adhoc"><?=gettext("Ad-hoc (IBSS)"); ?></option>
+<?php endif; ?>
+<?php if (interfaces_test_wireless_capability(get_real_interface($wancfg['if']), 'hostap')): ?>
 														<option <?php if ($pconfig['mode'] == 'hostap') echo "selected=\"selected\"";?> value="hostap"><?=gettext("Access Point"); ?></option>
+<?php endif; ?>
 													</select>
 												</td>
 											</tr>

src/www/interfaces_wireless_edit.php

@@ -182,8 +182,12 @@ include("head.inc");
 				                  <td class="vtable">
 				                    <select name="mode" class="selectpicker">
 				                      <option <?php if ($pconfig['mode'] == 'bss') echo "selected=\"selected\"";?> value="bss"><?=gettext("Infrastructure (BSS)");?></option>
+<?php if (interfaces_test_wireless_capability($pconfig['cloneif'], 'adhoc')): ?>
 				                      <option <?php if ($pconfig['mode'] == 'adhoc') echo "selected=\"selected\"";?> value="adhoc"><?=gettext("Ad-hoc (IBSS)");?></option>
+<?php endif; ?>
+<?php if (interfaces_test_wireless_capability($pconfig['cloneif'], 'hostap')): ?>
 				                      <option <?php if ($pconfig['mode'] == 'hostap') echo "selected=\"selected\"";?> value="hostap"><?=gettext("Access Point");?></option>
+<?php endif; ?>
 				                    </select></td>
 				                </tr>
 				                <tr>