Add TCP DNS server

package/luci/files/luci/i18n/smartdns.zh-cn.po

@@ -40,6 +40,12 @@ msgstr "IPV4 53端口重定向失败"
 msgid "IPV6 53 Port Redirect Failure"
 msgstr "IPV6 53端口重定向失败"
 
+msgid "TCP Server"
+msgstr "TCP服务器"
+
+msgid "Enable TCP DNS Server"
+msgstr "启用TCP服务器"
+
 msgid "IPV6 Server"
 msgstr "IPV6服务器"
 

package/luci/files/luci/model/cbi/smartdns.lua

@@ -31,11 +31,19 @@ o.rempty      = false
 
 ---- Port
 o = s:taboption("settings", Value, "port", translate("Local Port"), translate("Smartdns local server port"))
-o.placeholder = 5353
-o.default     = 5353
+o.placeholder = 5053
+o.default     = 5053
 o.datatype    = "port"
 o.rempty      = false
 
+---- Enable TCP server
+o = s:taboption("settings", Flag, "tcp_server", translate("TCP Server"), translate("Enable TCP DNS Server"))
+o.rmempty     = false
+o.default     = o.enabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "1"
+end
+
 ---- Support IPV6
 o = s:taboption("settings", Flag, "ipv6_server", translate("IPV6 Server"), translate("Enable IPV6 DNS Server"))
 o.rmempty     = false