From be9cb7af2c38c41e466b565f39109489fdfb61aa Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Sat, 10 Apr 2021 22:42:09 +0200
Subject: [PATCH] Minor improvements to IPObjects

---
 MediaBrowser.Common/Net/IPHost.cs       |  8 ++++----
 MediaBrowser.Common/Net/IPNetAddress.cs | 16 ++++++++--------
 MediaBrowser.Common/Net/IPObject.cs     | 16 +++-------------
 3 files changed, 15 insertions(+), 25 deletions(-)

diff --git a/MediaBrowser.Common/Net/IPHost.cs b/MediaBrowser.Common/Net/IPHost.cs
index d67b6b8e1..fb3ef9b12 100644
--- a/MediaBrowser.Common/Net/IPHost.cs
+++ b/MediaBrowser.Common/Net/IPHost.cs
@@ -135,7 +135,7 @@ namespace MediaBrowser.Common.Net
             }
 
             // See if it's an IPv6 with port address e.g. [::1] or [::1]:120.
-            int i = host.IndexOf("]", StringComparison.OrdinalIgnoreCase);
+            int i = host.IndexOf(']', StringComparison.Ordinal);
             if (i != -1)
             {
                 return TryParse(host.Remove(i - 1).TrimStart(' ', '['), out hostObj);
@@ -389,8 +389,8 @@ namespace MediaBrowser.Common.Net
         /// <inheritdoc/>
         protected override IPObject CalculateNetworkAddress()
         {
-            var netAddr = NetworkAddressOf(this[0], PrefixLength);
-            return new IPNetAddress(netAddr.Address, netAddr.PrefixLength);
+            var (address, prefixLength) = NetworkAddressOf(this[0], PrefixLength);
+            return new IPNetAddress(address, prefixLength);
         }
 
         /// <summary>
@@ -427,7 +427,7 @@ namespace MediaBrowser.Common.Net
                 // Resolves the host name - so save a DNS lookup.
                 if (string.Equals(HostName, "localhost", StringComparison.OrdinalIgnoreCase))
                 {
-                    _addresses = new IPAddress[] { new IPAddress(Ipv4Loopback), new IPAddress(Ipv6Loopback) };
+                    _addresses = new IPAddress[] { IPAddress.Loopback, IPAddress.IPv6Loopback };
                     return;
                 }
 
diff --git a/MediaBrowser.Common/Net/IPNetAddress.cs b/MediaBrowser.Common/Net/IPNetAddress.cs
index 59e37a5c6..589aad4b0 100644
--- a/MediaBrowser.Common/Net/IPNetAddress.cs
+++ b/MediaBrowser.Common/Net/IPNetAddress.cs
@@ -38,7 +38,7 @@ namespace MediaBrowser.Common.Net
         /// <summary>
         /// IP6Loopback address host.
         /// </summary>
-        public static readonly IPNetAddress IP6Loopback = IPNetAddress.Parse("::1");
+        public static readonly IPNetAddress IP6Loopback = new IPNetAddress(IPAddress.IPv6Loopback);
 
         /// <summary>
         /// Object's IP address.
@@ -113,7 +113,7 @@ namespace MediaBrowser.Common.Net
                 }
 
                 // Is it a network?
-                string[] tokens = addr.Split("/");
+                string[] tokens = addr.Split('/');
 
                 if (tokens.Length == 2)
                 {
@@ -171,8 +171,8 @@ namespace MediaBrowser.Common.Net
                 address = address.MapToIPv4();
             }
 
-            var altAddress = NetworkAddressOf(address, PrefixLength);
-            return NetworkAddress.Address.Equals(altAddress.Address) && NetworkAddress.PrefixLength >= altAddress.PrefixLength;
+            var (altAddress, altPrefix) = NetworkAddressOf(address, PrefixLength);
+            return NetworkAddress.Address.Equals(altAddress) && NetworkAddress.PrefixLength >= altPrefix;
         }
 
         /// <inheritdoc/>
@@ -196,8 +196,8 @@ namespace MediaBrowser.Common.Net
                     return NetworkAddress.PrefixLength <= netaddrObj.PrefixLength;
                 }
 
-                var altAddress = NetworkAddressOf(netaddrObj.Address, PrefixLength);
-                return NetworkAddress.Address.Equals(altAddress.Address);
+                var altAddress = NetworkAddressOf(netaddrObj.Address, PrefixLength).address;
+                return NetworkAddress.Address.Equals(altAddress);
             }
 
             return false;
@@ -270,8 +270,8 @@ namespace MediaBrowser.Common.Net
         /// <inheritdoc/>
         protected override IPObject CalculateNetworkAddress()
         {
-            var value = NetworkAddressOf(_address, PrefixLength);
-            return new IPNetAddress(value.Address, value.PrefixLength);
+            var (address, prefixLength) = NetworkAddressOf(_address, PrefixLength);
+            return new IPNetAddress(address, prefixLength);
         }
     }
 }
diff --git a/MediaBrowser.Common/Net/IPObject.cs b/MediaBrowser.Common/Net/IPObject.cs
index 69cd57f8a..3542dcd75 100644
--- a/MediaBrowser.Common/Net/IPObject.cs
+++ b/MediaBrowser.Common/Net/IPObject.cs
@@ -10,16 +10,6 @@ namespace MediaBrowser.Common.Net
     /// </summary>
     public abstract class IPObject : IEquatable<IPObject>
     {
-        /// <summary>
-        /// IPv6 Loopback address.
-        /// </summary>
-        protected static readonly byte[] Ipv6Loopback = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 };
-
-        /// <summary>
-        /// IPv4 Loopback address.
-        /// </summary>
-        protected static readonly byte[] Ipv4Loopback = { 127, 0, 0, 1 };
-
         /// <summary>
         /// The network address of this object.
         /// </summary>
@@ -64,7 +54,7 @@ namespace MediaBrowser.Common.Net
         /// <param name="address">IP Address to convert.</param>
         /// <param name="prefixLength">Subnet prefix.</param>
         /// <returns>IPAddress.</returns>
-        public static (IPAddress Address, byte PrefixLength) NetworkAddressOf(IPAddress address, byte prefixLength)
+        public static (IPAddress address, byte prefixLength) NetworkAddressOf(IPAddress address, byte prefixLength)
         {
             if (address == null)
             {
@@ -78,7 +68,7 @@ namespace MediaBrowser.Common.Net
 
             if (IsLoopback(address))
             {
-                return (Address: address, PrefixLength: prefixLength);
+                return (address, prefixLength);
             }
 
             // An ip address is just a list of bytes, each one representing a segment on the network.
@@ -110,7 +100,7 @@ namespace MediaBrowser.Common.Net
             }
 
             // Return the network address for the prefix.
-            return (Address: new IPAddress(addressBytes), PrefixLength: prefixLength);
+            return (new IPAddress(addressBytes), prefixLength);
         }
 
         /// <summary>