Extract networking constants

1 files changed, 0 insertions, 350 deletions

diff --git a/MediaBrowser.Common/Net/NetworkExtensions.cs b/MediaBrowser.Common/Net/NetworkExtensions.cs
deleted file mode 100644
index 47475b3da..000000000
--- a/MediaBrowser.Common/Net/NetworkExtensions.cs
+++ /dev/null
@@ -1,350 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
-using System.Net;
-using System.Net.Sockets;
-using System.Text.RegularExpressions;
-using Jellyfin.Extensions;
-using Microsoft.AspNetCore.HttpOverrides;
-
-namespace MediaBrowser.Common.Net
-{
-    /// <summary>
-    /// Defines the <see cref="NetworkExtensions" />.
-    /// </summary>
-    public static class NetworkExtensions
-    {
-        // Use regular expression as CheckHostName isn't RFC5892 compliant.
-        // Modified from gSkinner's expression at https://stackoverflow.com/questions/11809631/fully-qualified-domain-name-validation
-        private static readonly Regex _fqdnRegex = new Regex(@"(?im)^(?!:\/\/)(?=.{1,255}$)((.{1,63}\.){0,127}(?![0-9]*$)[a-z0-9-]+\.?)(:(\d){1,5}){0,1}$");
-
-        /// <summary>
-        /// Returns true if the IPAddress contains an IP6 Local link address.
-        /// </summary>
-        /// <param name="address">IPAddress object to check.</param>
-        /// <returns>True if it is a local link address.</returns>
-        /// <remarks>
-        /// See https://stackoverflow.com/questions/6459928/explain-the-instance-properties-of-system-net-ipaddress
-        /// it appears that the IPAddress.IsIPv6LinkLocal is out of date.
-        /// </remarks>
-        public static bool IsIPv6LinkLocal(IPAddress address)
-        {
-            ArgumentNullException.ThrowIfNull(address);
-
-            if (address.IsIPv4MappedToIPv6)
-            {
-                address = address.MapToIPv4();
-            }
-
-            if (address.AddressFamily != AddressFamily.InterNetworkV6)
-            {
-                return false;
-            }
-
-            // GetAddressBytes
-            Span<byte> octet = stackalloc byte[16];
-            address.TryWriteBytes(octet, out _);
-            uint word = (uint)(octet[0] << 8) + octet[1];
-
-            return word >= 0xfe80 && word <= 0xfebf; // fe80::/10 :Local link.
-        }
-
-        /// <summary>
-        /// Convert a subnet mask in CIDR notation to a dotted decimal string value. IPv4 only.
-        /// </summary>
-        /// <param name="cidr">Subnet mask in CIDR notation.</param>
-        /// <param name="family">IPv4 or IPv6 family.</param>
-        /// <returns>String value of the subnet mask in dotted decimal notation.</returns>
-        public static IPAddress CidrToMask(byte cidr, AddressFamily family)
-        {
-            uint addr = 0xFFFFFFFF << ((family == AddressFamily.InterNetwork ? 32 : 128) - cidr);
-            addr = ((addr & 0xff000000) >> 24)
-                   | ((addr & 0x00ff0000) >> 8)
-                   | ((addr & 0x0000ff00) << 8)
-                   | ((addr & 0x000000ff) << 24);
-            return new IPAddress(addr);
-        }
-
-        /// <summary>
-        /// Convert a subnet mask in CIDR notation to a dotted decimal string value. IPv4 only.
-        /// </summary>
-        /// <param name="cidr">Subnet mask in CIDR notation.</param>
-        /// <param name="family">IPv4 or IPv6 family.</param>
-        /// <returns>String value of the subnet mask in dotted decimal notation.</returns>
-        public static IPAddress CidrToMask(int cidr, AddressFamily family)
-        {
-            uint addr = 0xFFFFFFFF << ((family == AddressFamily.InterNetwork ? 32 : 128) - cidr);
-            addr = ((addr & 0xff000000) >> 24)
-                   | ((addr & 0x00ff0000) >> 8)
-                   | ((addr & 0x0000ff00) << 8)
-                   | ((addr & 0x000000ff) << 24);
-            return new IPAddress(addr);
-        }
-
-        /// <summary>
-        /// Convert a subnet mask to a CIDR. IPv4 only.
-        /// https://stackoverflow.com/questions/36954345/get-cidr-from-netmask.
-        /// </summary>
-        /// <param name="mask">Subnet mask.</param>
-        /// <returns>Byte CIDR representing the mask.</returns>
-        public static byte MaskToCidr(IPAddress mask)
-        {
-            ArgumentNullException.ThrowIfNull(mask);
-
-            byte cidrnet = 0;
-            if (mask.Equals(IPAddress.Any))
-            {
-                return cidrnet;
-            }
-
-            // GetAddressBytes
-            Span<byte> bytes = stackalloc byte[mask.AddressFamily == AddressFamily.InterNetwork ? 4 : 16];
-            if (!mask.TryWriteBytes(bytes, out var bytesWritten))
-            {
-                Console.WriteLine("Unable to write address bytes, only {Bytes} bytes written.", bytesWritten);
-            }
-
-            var zeroed = false;
-            for (var i = 0; i < bytes.Length; i++)
-            {
-                for (int v = bytes[i]; (v & 0xFF) != 0; v <<= 1)
-                {
-                    if (zeroed)
-                    {
-                        // Invalid netmask.
-                        return (byte)~cidrnet;
-                    }
-
-                    if ((v & 0x80) == 0)
-                    {
-                        zeroed = true;
-                    }
-                    else
-                    {
-                        cidrnet++;
-                    }
-                }
-            }
-
-            return cidrnet;
-        }
-
-        /// <summary>
-        /// Converts an IPAddress into a string.
-        /// IPv6 addresses are returned in [ ], with their scope removed.
-        /// </summary>
-        /// <param name="address">Address to convert.</param>
-        /// <returns>URI safe conversion of the address.</returns>
-        public static string FormatIPString(IPAddress? address)
-        {
-            if (address is null)
-            {
-                return string.Empty;
-            }
-
-            var str = address.ToString();
-            if (address.AddressFamily == AddressFamily.InterNetworkV6)
-            {
-                int i = str.IndexOf('%', StringComparison.Ordinal);
-                if (i != -1)
-                {
-                    str = str.Substring(0, i);
-                }
-
-                return $"[{str}]";
-            }
-
-            return str;
-        }
-
-        /// <summary>
-        /// Try parsing an array of strings into <see cref="IPNetwork"/> objects, respecting exclusions.
-        /// Elements without a subnet mask will be represented as <see cref="IPNetwork"/> with a single IP.
-        /// </summary>
-        /// <param name="values">Input string array to be parsed.</param>
-        /// <param name="result">Collection of <see cref="IPNetwork"/>.</param>
-        /// <param name="negated">Boolean signaling if negated or not negated values should be parsed.</param>
-        /// <returns><c>True</c> if parsing was successful.</returns>
-        public static bool TryParseToSubnets(string[] values, [NotNullWhen(true)] out IReadOnlyList<IPNetwork>? result, bool negated = false)
-        {
-            if (values is null || values.Length == 0)
-            {
-                result = null;
-                return false;
-            }
-
-            var tmpResult = new List<IPNetwork>();
-            for (int a = 0; a < values.Length; a++)
-            {
-                if (TryParseToSubnet(values[a], out var innerResult, negated))
-                {
-                    tmpResult.Add(innerResult);
-                }
-            }
-
-            result = tmpResult;
-            return tmpResult.Count > 0;
-        }
-
-        /// <summary>
-        /// Try parsing a string into an <see cref="IPNetwork"/>, respecting exclusions.
-        /// Inputs without a subnet mask will be represented as <see cref="IPNetwork"/> with a single IP.
-        /// </summary>
-        /// <param name="value">Input string to be parsed.</param>
-        /// <param name="result">An <see cref="IPNetwork"/>.</param>
-        /// <param name="negated">Boolean signaling if negated or not negated values should be parsed.</param>
-        /// <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())
-            {
-                var ipBlock = splitString.Current;
-                var address = IPAddress.None;
-                if (negated && ipBlock.StartsWith("!") && IPAddress.TryParse(ipBlock[1..], out var tmpAddress))
-                {
-                    address = tmpAddress;
-                }
-                else if (!negated && IPAddress.TryParse(ipBlock, out tmpAddress))
-                {
-                    address = tmpAddress;
-                }
-
-                if (address != IPAddress.None)
-                {
-                    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, NetworkExtensions.MaskToCidr(netmaskAddress));
-                            return true;
-                        }
-                    }
-                    else if (address.AddressFamily == AddressFamily.InterNetwork)
-                    {
-                        result = new IPNetwork(address, 32);
-                        return true;
-                    }
-                    else if (address.AddressFamily == AddressFamily.InterNetworkV6)
-                    {
-                        result = new IPNetwork(address, 128);
-                        return true;
-                    }
-                }
-            }
-
-            result = null;
-            return false;
-        }
-
-        /// <summary>
-        /// Attempts to parse a host span.
-        /// </summary>
-        /// <param name="host">Host name to parse.</param>
-        /// <param name="addresses">Object representing the span, if it has successfully been parsed.</param>
-        /// <param name="isIPv4Enabled"><c>true</c> if IPv4 is enabled.</param>
-        /// <param name="isIPv6Enabled"><c>true</c> if IPv6 is enabled.</param>
-        /// <returns><c>true</c> if the parsing is successful, <c>false</c> if not.</returns>
-        public static bool TryParseHost(ReadOnlySpan<char> host, [NotNullWhen(true)] out IPAddress[]? addresses, bool isIPv4Enabled = true, bool isIPv6Enabled = false)
-        {
-            if (host.IsEmpty)
-            {
-                addresses = null;
-                return false;
-            }
-
-            host = host.Trim();
-
-            // See if it's an IPv6 with port address e.g. [::1] or [::1]:120.
-            if (host[0] == '[')
-            {
-                int i = host.IndexOf("]", StringComparison.Ordinal);
-                if (i != -1)
-                {
-                    return TryParseHost(host[1..(i - 1)], out addresses);
-                }
-
-                addresses = Array.Empty<IPAddress>();
-                return false;
-            }
-
-            var hosts = new List<string>();
-            foreach (var splitSpan in host.Split(':'))
-            {
-                hosts.Add(splitSpan.ToString());
-            }
-
-            if (hosts.Count <= 2)
-            {
-                // Is hostname or hostname:port
-                if (_fqdnRegex.IsMatch(hosts[0]))
-                {
-                    try
-                    {
-                        addresses = Dns.GetHostAddresses(hosts[0]);
-                        return true;
-                    }
-                    catch (SocketException)
-                    {
-                        // Log and then ignore socket errors, as the result value will just be an empty array.
-                        Console.WriteLine("GetHostAddresses failed.");
-                    }
-                }
-
-                // Is an IP4 or IP4:port
-                if (IPAddress.TryParse(hosts[0].AsSpan().LeftPart('/'), out var address))
-                {
-                    if (((address.AddressFamily == AddressFamily.InterNetwork) && (!isIPv4Enabled && isIPv6Enabled))
-                        || ((address.AddressFamily == AddressFamily.InterNetworkV6) && (isIPv4Enabled && !isIPv6Enabled)))
-                    {
-                        addresses = Array.Empty<IPAddress>();
-                        return false;
-                    }
-
-                    addresses = new[] { address };
-
-                    // Host name is an ip4 address, so fake resolve.
-                    return true;
-                }
-            }
-            else if (hosts.Count > 0 && hosts.Count <= 9) // 8 octets + port
-            {
-                if (IPAddress.TryParse(host.LeftPart('/'), out var address))
-                {
-                    addresses = new[] { address };
-                    return true;
-                }
-            }
-
-            addresses = Array.Empty<IPAddress>();
-            return false;
-        }
-
-        /// <summary>
-        /// Gets the broadcast address for a <see cref="IPNetwork"/>.
-        /// </summary>
-        /// <param name="network">The <see cref="IPNetwork"/>.</param>
-        /// <returns>The broadcast address.</returns>
-        public static IPAddress GetBroadcastAddress(IPNetwork network)
-        {
-            var addressBytes = network.Prefix.GetAddressBytes();
-            if (BitConverter.IsLittleEndian)
-            {
-                addressBytes.Reverse();
-            }
-
-            uint iPAddress = BitConverter.ToUInt32(addressBytes, 0);
-            uint ipMaskV4 = BitConverter.ToUInt32(CidrToMask(network.PrefixLength, AddressFamily.InterNetwork).GetAddressBytes(), 0);
-            uint broadCastIPAddress = iPAddress | ~ipMaskV4;
-
-            return new IPAddress(BitConverter.GetBytes(broadCastIPAddress));
-        }
-    }
-}