luci-base: support disconnecting (deauthenticating) wireless clients

Add a button to each row in the wireless assoclist table to allow
disconnecting clients using the ubus del_client method if the underlying
radio interface supports it.

Ref: https://github.com/openwrt/luci/pull/2271
Submitted-by: Wang805447391 <805447391@qq.com>
[move deauth function to luci-base next to the existing assoclist function,
 require post security, fix parameter check condition, hide button if not
 supported by the radio, disable button after call, squash commits, fix
 whitespace, reword subject, add commit message]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

2 files changed, 57 insertions, 1 deletions

diff --git a/modules/luci-base/luasrc/controller/admin/index.lua b/modules/luci-base/luasrc/controller/admin/index.lua
index 39004c676..1f7db0cb3 100644
--- a/modules/luci-base/luasrc/controller/admin/index.lua
+++ b/modules/luci-base/luasrc/controller/admin/index.lua
@@ -80,6 +80,9 @@ function index()
 	if has_wifi then
 		page = entry({"admin", "wireless_assoclist"}, call("wifi_assoclist"), nil)
 		page.leaf = true
+
+		page = entry({"admin", "wireless_deauth"}, post("wifi_deauth"), nil)
+		page.leaf = true
 	end
 
 	page = entry({"admin", "translations"}, call("action_translations"), nil)
@@ -144,3 +147,18 @@ function wifi_assoclist()
 	luci.http.prepare_content("application/json")
 	luci.http.write_json(s.wifi_assoclist())
 end
+
+function wifi_deauth()
+	local iface = luci.http.formvalue("iface")
+	local bssid = luci.http.formvalue("bssid")
+
+	if iface and bssid then
+		luci.util.ubus("hostapd.%s" % iface, "del_client", {
+			addr = bssid,
+			deauth = true,
+			reason = 5,
+			ban_time = 60000
+		})
+	end
+	luci.http.status(200, "OK")
+end
diff --git a/modules/luci-base/luasrc/view/wifi_assoclist.htm b/modules/luci-base/luasrc/view/wifi_assoclist.htm
index 700d998ad..b7147bfb7 100644
--- a/modules/luci-base/luasrc/view/wifi_assoclist.htm
+++ b/modules/luci-base/luasrc/view/wifi_assoclist.htm
@@ -1,4 +1,21 @@
+<%
+	local supports_deauth = {}
+
+	local _, v
+	for _, v in ipairs(luci.util.ubus()) do
+		local iface = v:match("^hostapd%.(.+)$")
+		if iface then
+			local funcs = luci.util.ubus(v)
+			if type(funcs) == "table" and funcs.del_client then
+				supports_deauth[iface] = true
+			end
+		end
+	end
+%>
+
 <script type="text/javascript">//<![CDATA[
+	var supports_deauth = <%= luci.http.write_json(supports_deauth) %>;
+
 	function wifirate(bss, rx) {
 		var p = rx ? 'rx_' : 'tx_',
 		    s = '%.1f <%:Mbit/s%>, %d<%:MHz%>'
@@ -17,6 +34,16 @@
 		return s;
 	}
 
+	function handleDeauth(ev) {
+		(new XHR()).post('<%=url('admin/wireless_deauth')%>', {
+			token: '<%=token%>',
+			iface: ev.target.getAttribute('data-iface'),
+			bssid: ev.target.getAttribute('data-bssid')
+		}, function() {
+			ev.target.disabled = true;
+		});
+	}
+
 	XHR.poll(5, '<%=url('admin/wireless_assoclist')%>', null,
 		function(x, st)
 		{
@@ -58,7 +85,15 @@
 							E('span', wifirate(bss, true)),
 							E('br'),
 							E('span', wifirate(bss, false))
-						])
+						]),
+						supports_deauth[bss.ifname] ? E('input', {
+							type: 'button',
+							class: 'cbi-button cbi-button-remove',
+							value: '<%:Disconnect%>',
+							'data-bssid': bss.bssid,
+							'data-iface': bss.ifname,
+							click: handleDeauth
+						}) : '-'
 					]);
 				});
 
@@ -75,6 +110,9 @@
 		<div class="th nowrap"><%:Host%></div>
 		<div class="th nowrap"><%:Signal%> / <%:Noise%></div>
 		<div class="th nowrap"><%:RX Rate%> / <%:TX Rate%></div>
+		<% if next(supports_deauth) then %>
+			<div class="th right"><%:Disconnect%></div>
+		<% end %>
 	</div>
 	<div class="tr placeholder">
 		<div class="td"><em><%:Collecting data...%></em></div>