From 3c3f0a765e285c8e3a73f922307ce62f9fd5e6d7 Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Thu, 16 Nov 2023 00:50:17 +0100
Subject: Use new IPNetwork.TryParse function

---
 MediaBrowser.Common/Net/NetworkUtils.cs | 51 +++++++++++----------------------
 1 file changed, 17 insertions(+), 34 deletions(-)

(limited to 'MediaBrowser.Common/Net')

diff --git a/MediaBrowser.Common/Net/NetworkUtils.cs b/MediaBrowser.Common/Net/NetworkUtils.cs
index 4110b000e..e482089f0 100644
--- a/MediaBrowser.Common/Net/NetworkUtils.cs
+++ b/MediaBrowser.Common/Net/NetworkUtils.cs
@@ -197,46 +197,29 @@ public static partial class NetworkUtils
     /// <returns><c>True</c> if parsing was successful.</returns>
     public static bool TryParseToSubnet(ReadOnlySpan<char> value, [NotNullWhen(true)] out IPNetwork? result, bool negated = false)
     {
-        var splitString = value.Trim().Split('/');
-        if (splitString.MoveNext())
+        value = value.Trim();
+        if (value.Contains('/'))
         {
-            var ipBlock = splitString.Current;
-            var address = IPAddress.None;
-            if (negated && ipBlock.StartsWith("!") && IPAddress.TryParse(ipBlock[1..], out var tmpAddress))
+            if (negated && value.StartsWith("!") && IPNetwork.TryParse(value[1..], out result))
             {
-                address = tmpAddress;
+                return true;
             }
-            else if (!negated && IPAddress.TryParse(ipBlock, out tmpAddress))
+            else if (!negated && IPNetwork.TryParse(value, out result))
             {
-                address = tmpAddress;
+                return true;
             }
-
-            if (address != IPAddress.None)
+        }
+        else if (IPAddress.TryParse(value, out var address))
+        {
+            if (address.AddressFamily == AddressFamily.InterNetwork)
             {
-                if (splitString.MoveNext())
-                {
-                    var subnetBlock = splitString.Current;
-                    if (int.TryParse(subnetBlock, out var netmask))
-                    {
-                        result = new IPNetwork(address, netmask);
-                        return true;
-                    }
-                    else if (IPAddress.TryParse(subnetBlock, out var netmaskAddress))
-                    {
-                        result = new IPNetwork(address, NetworkUtils.MaskToCidr(netmaskAddress));
-                        return true;
-                    }
-                }
-                else if (address.AddressFamily == AddressFamily.InterNetwork)
-                {
-                    result = address.Equals(IPAddress.Any) ? NetworkConstants.IPv4Any : new IPNetwork(address, NetworkConstants.MinimumIPv4PrefixSize);
-                    return true;
-                }
-                else if (address.AddressFamily == AddressFamily.InterNetworkV6)
-                {
-                    result = address.Equals(IPAddress.IPv6Any) ? NetworkConstants.IPv6Any : new IPNetwork(address, NetworkConstants.MinimumIPv6PrefixSize);
-                    return true;
-                }
+                result = address.Equals(IPAddress.Any) ? NetworkConstants.IPv4Any : new IPNetwork(address, NetworkConstants.MinimumIPv4PrefixSize);
+                return true;
+            }
+            else if (address.AddressFamily == AddressFamily.InterNetworkV6)
+            {
+                result = address.Equals(IPAddress.IPv6Any) ? NetworkConstants.IPv6Any : new IPNetwork(address, NetworkConstants.MinimumIPv6PrefixSize);
+                return true;
             }
         }
 
-- 
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