add -6 to ping cmd if ipv6 address

server/ping-lite.js

@@ -1,7 +1,7 @@
 // https://github.com/ben-bradley/ping-lite/blob/master/ping-lite.js
 // Fixed on Windows
-
-let spawn = require("child_process").spawn,
+const net = require("net");
+const spawn = require("child_process").spawn,
     events = require("events"),
     fs = require("fs"),
     WIN = /^win/.test(process.platform),
@@ -24,14 +24,24 @@ function Ping(host, options) {
         this._bin = "c:/windows/system32/ping.exe";
         this._args = (options.args) ? options.args : [ "-n", "1", "-w", "5000", host ];
         this._regmatch = /[><=]([0-9.]+?)ms/;
+
     } else if (LIN) {
         this._bin = "/bin/ping";
-        this._args = (options.args) ? options.args : [ "-n", "-w", "2", "-c", "1", host ];
-        this._regmatch = /=([0-9.]+?) ms/; // need to verify this
+
+        const defaultArgs = [ "-n", "-w", "2", "-c", "1", host ];
+
+        if (net.isIPv6(host)) {
+            defaultArgs.unshift("-6");
+        }
+
+        this._args = (options.args) ? options.args : defaultArgs;
+        this._regmatch = /=([0-9.]+?) ms/;
+
     } else if (MAC) {
         this._bin = "/sbin/ping";
         this._args = (options.args) ? options.args : [ "-n", "-t", "2", "-c", "1", host ];
         this._regmatch = /=([0-9.]+?) ms/;
+
     } else {
         throw new Error("Could not detect your ping binary.");
     }