Show ip address in main menu

builtin/mainmenu/init.lua

@@ -64,7 +64,22 @@ local function main_event_handler(tabview, event)
 end
 
 local function init_globals()
-	-- Permanent warning if on an unoptimized debug build
+
+	local old_set_topleft = core.set_topleft_text
+
+    core.set_topleft_text = function(s)
+        local my_ip = "Not available"
+        if core.get_local_ip then
+            my_ip = core.get_local_ip()
+        end
+
+        s = (s or "") .. "\nLocal IP: " .. my_ip
+
+        if old_set_topleft then
+            old_set_topleft(s)
+        end
+    end
+
 	if core.is_debug_build() then
 		local set_topleft_text = core.set_topleft_text
 		core.set_topleft_text = function(s)

src/script/lua_api/l_mainmenu.cpp

@@ -28,6 +28,9 @@
 #include "gettext.h"
 #include "log.h"
 #include "util/string.h"
+#include <ifaddrs.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
 
 #include <cassert>
 #include <iostream>
@@ -1097,7 +1100,34 @@ int ModApiMainMenu::l_do_async_callback(lua_State *L)
 	lua_pushinteger(L, jobId);
 	return 1;
 }
-
+/******************************************************************************/
+int ModApiMainMenu::l_get_local_ip(lua_State *L)
+{
+    struct ifaddrs *list;
+    std::string final_ip = "IP Not Found";
+
+    if (getifaddrs(&list) == 0) {
+        struct ifaddrs *cur;
+        for (cur = list; cur != NULL; cur = cur->ifa_next) {
+            if (cur->ifa_addr && cur->ifa_addr->sa_family == AF_INET) {
+
+                struct sockaddr_in *sin = (struct sockaddr_in *)cur->ifa_addr;
+
+                if ((ntohl(sin->sin_addr.s_addr) & IN_CLASSA_NET) == (INADDR_LOOPBACK & IN_CLASSA_NET)) {
+                    continue; 
+                }
+
+                char *ip_string = inet_ntoa(sin->sin_addr);
+                final_ip = std::string(ip_string);
+                break; 
+            }
+        }        
+        freeifaddrs(list);
+    }
+
+    lua_pushstring(L, final_ip.c_str());
+    return 1;
+}
 /******************************************************************************/
 void ModApiMainMenu::Initialize(lua_State *L, int top)
 {
@@ -1156,6 +1186,7 @@ void ModApiMainMenu::Initialize(lua_State *L, int top)
 
 	lua_pushboolean(L, g_first_run);
 	lua_setfield(L, top, "is_first_run");
+	API_FCT(get_local_ip);
 }
 
 /******************************************************************************/

src/script/lua_api/l_mainmenu.h

@@ -151,6 +151,8 @@ class ModApiMainMenu: public ModApiBase
 	// async
 	static int l_do_async_callback(lua_State *L);
 
+	static int l_get_local_ip(lua_State *L);
+
 public:
 
 	/**