From e3c86944718d68806ad42c4d14c964a72da90b44 Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Fri, 15 Aug 2014 12:35:41 -0400
Subject: 3.0.5340.20849

---
 .../Networking/NetworkManager.cs                   | 47 ++++++++++++++++++++--
 1 file changed, 44 insertions(+), 3 deletions(-)

(limited to 'MediaBrowser.ServerApplication/Networking/NetworkManager.cs')

diff --git a/MediaBrowser.ServerApplication/Networking/NetworkManager.cs b/MediaBrowser.ServerApplication/Networking/NetworkManager.cs
index e80c8ff3f..7a2e184b6 100644
--- a/MediaBrowser.ServerApplication/Networking/NetworkManager.cs
+++ b/MediaBrowser.ServerApplication/Networking/NetworkManager.cs
@@ -1,12 +1,13 @@
-using System.Globalization;
-using System.IO;
-using MediaBrowser.Common.Implementations.Networking;
+using MediaBrowser.Common.Implementations.Networking;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Net;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
 using System.Linq;
+using System.Net;
 using System.Runtime.InteropServices;
 
 namespace MediaBrowser.ServerApplication.Networking
@@ -43,6 +44,46 @@ namespace MediaBrowser.ServerApplication.Networking
             };
         }
 
+        public bool IsInLocalNetwork(string endpoint)
+        {
+            if (string.IsNullOrWhiteSpace(endpoint))
+            {
+                throw new ArgumentNullException("endpoint");
+            }
+
+            IPAddress address;
+            if (!IPAddress.TryParse(endpoint, out address))
+            {
+                return true;
+            }
+
+            const int lengthMatch = 4;
+
+            if (endpoint.Length >= lengthMatch)
+            {
+                var prefix = endpoint.Substring(0, lengthMatch);
+
+                if (GetLocalIpAddresses()
+                    .Any(i => i.StartsWith(prefix, StringComparison.OrdinalIgnoreCase)))
+                {
+                    return true;
+                }
+            }
+
+            // Private address space:
+            // http://en.wikipedia.org/wiki/Private_network
+
+            return
+
+                // If url was requested with computer name, we may see this
+                endpoint.IndexOf("::", StringComparison.OrdinalIgnoreCase) != -1 ||
+
+                endpoint.StartsWith("10.", StringComparison.OrdinalIgnoreCase) ||
+                endpoint.StartsWith("192.", StringComparison.OrdinalIgnoreCase) ||
+                endpoint.StartsWith("172.", StringComparison.OrdinalIgnoreCase) ||
+                endpoint.StartsWith("169.", StringComparison.OrdinalIgnoreCase);
+        }
+
         /// <summary>
         /// To the type of the network share.
         /// </summary>
-- 
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