Implement experimental antietcd-based version of monitor

mon/utils.js

@@ -0,0 +1,37 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+
+const os = require('os');
+
+function local_ips(all)
+{
+    const ips = [];
+    const ifaces = os.networkInterfaces();
+    for (const ifname in ifaces)
+    {
+        for (const iface of ifaces[ifname])
+        {
+            if (iface.family == 'IPv4' && !iface.internal || all)
+            {
+                ips.push(iface.address);
+            }
+        }
+    }
+    return ips;
+}
+
+function b64(str)
+{
+    return Buffer.from(str).toString('base64');
+}
+
+function de64(str)
+{
+    return Buffer.from(str, 'base64').toString();
+}
+
+module.exports = {
+    b64,
+    de64,
+    local_ips,
+};