Add config flag to dis/allow new accounts

new flag "account_creation" in login config file
(true/false) which permits new accounts to be
created. Defaults to true.

conf/login_darkstar.conf

@@ -65,3 +65,7 @@ msg_server_ip: 127.0.0.1
 
 #Logging of user IP address to database (true/false)
 log_user_ip: false
+
+#New accounts may be created? (true/false)
+account_creation: true
+

src/login/login.cpp

@@ -120,6 +120,11 @@ int32 do_init(int32 argc, char** argv)
 
     messageThread = std::thread(message_server_init);
     ShowStatus("The login-server is " CL_GREEN"ready" CL_RESET" to work...\n");
+
+    if(!login_config.account_creation)
+    {
+        ShowStatus("New account creation is " CL_RED"disabled" CL_RESET" in login_config.\n");
+    }
 
     bool attached = isatty(0);
 
@@ -440,6 +445,10 @@ void login_config_read(const char *key, const char *value)
     {
         login_config.log_user_ip = config_switch(value);
     }
+    else if (strcmp(key, "account_creation") == 0)
+    {
+        login_config.account_creation = config_switch(value);
+    }
     else
     {
         ShowWarning("Unknown setting '%s' with value '%s' in  login file\n", key, value);
@@ -490,6 +499,7 @@ void login_config_default()
     login_config.msg_server_ip = "127.0.0.1";
 
     login_config.log_user_ip = "false";
+    login_config.account_creation = "true";
 }
 
 void version_info_default()

src/login/login.h

@@ -60,6 +60,7 @@ struct login_config_t
     uint16 msg_server_port;         // chat server port
     std::string msg_server_ip;      // chat server IP
     bool  log_user_ip;              // log user ip -> default false
+    bool  account_creation;         // allow new accounts to be created -> default true
 };
 
 struct version_info_t

src/login/login_auth.cpp

@@ -209,9 +209,20 @@ int32 login_parse(int32 fd)
         }
         break;
         case LOGIN_CREATE:
-            //looking for same login
             Sql_EscapeString(SqlHandle, escaped_name, name.c_str());
             Sql_EscapeString(SqlHandle, escaped_pass, password.c_str());
+
+           //check if account creation is disabled
+            if (!login_config.account_creation)
+            {
+                ShowWarning(CL_WHITE"login_parse" CL_RESET": New account attempt <" CL_WHITE"%s" CL_RESET"> but is disabled in config.\n", escaped_name);
+                session[fd]->wdata.resize(1);
+                ref<uint8>(session[fd]->wdata.data(), 0) = LOGIN_ERROR_CREATE;
+                do_close_login(sd, fd);
+                return 0;
+            }
+
+           //looking for same login
             if (Sql_Query(SqlHandle, "SELECT accounts.id FROM accounts WHERE accounts.login = '%s'", escaped_name) == SQL_ERROR)
             {
                 session[fd]->wdata.resize(1);