From 13268f9951fdf1c0f5fc32230286190026746485 Mon Sep 17 00:00:00 2001
From: paweldomas <pawel.domas@jitsi.org>
Date: Tue, 27 Oct 2015 14:34:10 -0500
Subject: [PATCH] Creates RandomUtil class for generating random strings.

---
 modules/util/RandomUtil.js           | 37 ++++++++++++++++++++++++++++
 modules/xmpp/LocalSSRCReplacement.js | 30 +++-------------------
 2 files changed, 40 insertions(+), 27 deletions(-)
 create mode 100644 modules/util/RandomUtil.js

diff --git a/modules/util/RandomUtil.js b/modules/util/RandomUtil.js
new file mode 100644
index 000000000..ba888b020
--- /dev/null
+++ b/modules/util/RandomUtil.js
@@ -0,0 +1,37 @@
+
+/**
+ * Generates random hex number within the range [min, max]
+ * @param max the maximum value for the generated number
+ * @param min the minimum value for the generated number
+ * @returns random hex number
+ */
+function rangeRandomHex(min, max)
+{
+    return Math.floor(Math.random() * (max - min) + min).toString(16);
+}
+
+/**
+ * Exported interface.
+ */
+var RandomUtil = {
+    /**
+     * Generates hex number with length 4
+     */
+    random4digitsHex: function() {
+        return rangeRandomHex(4096, 65535);
+    },
+    /**
+     * Generates hex number with length 8
+     */
+    random8digitsHex: function() {
+        return rangeRandomHex(268435456, 4294967295);
+    },
+    /**
+     * Generates hex number with length 12
+     */
+    random12digitsHex: function() {
+        return rangeRandomHex(17592186044416, 281474976710655);
+    }
+};
+
+module.exports = RandomUtil;
diff --git a/modules/xmpp/LocalSSRCReplacement.js b/modules/xmpp/LocalSSRCReplacement.js
index 274c4229d..6f74a8c52 100644
--- a/modules/xmpp/LocalSSRCReplacement.js
+++ b/modules/xmpp/LocalSSRCReplacement.js
@@ -32,6 +32,7 @@
  */
 
 var SDP = require('./SDP');
+var RandomUtil = require('../util/RandomUtil');
 var RTCBrowserType = require('../RTC/RTCBrowserType');
 
 /**
@@ -124,38 +125,13 @@ var storeLocalVideoSSRC = function (jingleIq) {
     });
 };
 
-/**
- * Generates random hex number within the range [min, max]
- * @param max the maximum value for the generated number
- * @param min the minimum value for the generated number
- * @returns random hex number
- */
-function rangeRandomHex(min, max)
-{
-    return Math.floor(Math.random() * (max - min) + min).toString(16);
-}
-
-/**
- * Generates hex number with length 4
- */
-var random4digitsHex = rangeRandomHex.bind(null, 4096, 65535);
-
-/**
- * Generates hex number with length 8
- */
-var random8digitsHex = rangeRandomHex.bind(null, 268435456, 4294967295);
-
-/**
- * Generates hex number with length 12
- */
-var random12digitsHex = rangeRandomHex.bind(null, 17592186044416, 281474976710655);
-
 /**
  * Generates new label/mslabel attribute
  * @returns {string} label/mslabel attribute
  */
 function generateLabel() {
-    return random8digitsHex() + "-" + random4digitsHex() + "-" + random4digitsHex() + "-" + random4digitsHex() + "-" + random12digitsHex();
+    return RandomUtil.random8digitsHex() + "-" + RandomUtil.random4digitsHex() + "-" +
+           RandomUtil.random4digitsHex() + "-" + RandomUtil.random4digitsHex() + "-" + RandomUtil.random12digitsHex();
 }
 
 /**