app.portBindings and newManifest.tcpPorts may be null

src/sysinfo.js

@@ -0,0 +1,28 @@
+'use strict';
+
+exports = module.exports = {
+    getIp: getIp
+};
+
+var os = require('os');
+
+var gCachedIp = null;
+
+function getIp() {
+    if (gCachedIp) return gCachedIp;
+
+    var ifaces = os.networkInterfaces();
+    for (var dev in ifaces) {
+        if (dev.match(/^(en|eth|wlp).*/) === null) continue;
+
+        for (var i = 0; i < ifaces[dev].length; i++) {
+            if (ifaces[dev][i].family === 'IPv4') {
+                gCachedIp = ifaces[dev][i].address;
+                return gCachedIp;
+            }
+        }
+    }
+
+    return null;
+}
+