Fix ESP8266LLMNR for build with lwip2 (#3821)

* Fix for build with lwip2

* Fix for lwip2: Removed unnecessary #ifdefs

* Remove duplicate define for BIT

Author: devyte

libraries/ESP8266LLMNR/ESP8266LLMNR.cpp

@@ -50,7 +50,7 @@ extern "C" {
 
 //#define LLMNR_DEBUG
 
-#define BIT(x) (1 << (x))
+//BIT(x) is defined in tools/sdk/c_types.h
 
 #define FLAGS_QR                BIT(15)
 #define FLAGS_OP_SHIFT          11
@@ -226,14 +226,15 @@ void LLMNRResponder::_process_packet() {
         Serial.println("(no matching RRs)");
 #endif
 
-    struct ip_info remote_ip_info;
-    remote_ip_info.ip.addr = _conn->getRemoteAddress();
+    ip_addr_t remote_ip;
+    remote_ip.addr = _conn->getRemoteAddress();
+
     struct ip_info ip_info;
     bool match_ap = false;
     if (wifi_get_opmode() & SOFTAP_MODE) {
         wifi_get_ip_info(SOFTAP_IF, &ip_info);
-        if (ip_info.ip.addr && ip_addr_netcmp(&remote_ip_info.ip, &ip_info.ip, &ip_info.netmask))
-            match_ap = true;
+    if (ip_info.ip.addr && ip_addr_netcmp(&remote_ip, &ip_info.ip, &ip_info.netmask))
+        match_ap = true;
     }
     if (!match_ap)
         wifi_get_ip_info(STATION_IF, &ip_info);
@@ -272,8 +273,8 @@ void LLMNRResponder::_process_packet() {
         };
         _conn->append(reinterpret_cast<const char*>(rr), sizeof(rr));
     }
-    _conn->setMulticastInterface(remote_ip_info.ip);
-    _conn->send(&remote_ip_info.ip, _conn->getRemotePort());
+    _conn->setMulticastInterface(remote_ip);
+    _conn->send(&remote_ip, _conn->getRemotePort());
 }
 
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_LLMNR)