MDL-15148

In fact, getting IP lookup too from MDL-15008 by Lue Hudson.

mnet/environment.php

@@ -155,7 +155,18 @@ class mnet_environment {
         $this->wwwroot = $CFG->wwwroot;
         $details                  = openssl_x509_parse($this->public_key);
         $this->public_key_expires = $details['validTo_time_t'];
-
+        if (empty($_SERVER['SERVER_ADDR'])) {
+            // SERVER_ADDR is only returned by Apache-like webservers
+            $my_hostname = mnet_get_hostname_from_uri($CFG->wwwroot);
+            $my_ip       = gethostbyname($my_hostname);  // Returns unmodified hostname on failure. DOH!
+            if ($my_ip == $my_hostname) {
+                $this->ip_address = 'UNKNOWN';
+            } else {
+                $this->ip_address = $my_ip;
+            }
+        } else {
+            $this->ip_address = $_SERVER['SERVER_ADDR'];
+        }
         set_config('openssl', implode('@@@@@@@@', $this->keypair), 'mnet');
 
         update_record('mnet_host', $this);