Merge pull request #9958 from Shadowghost/networking-fixex
Bond-009
2 years ago
committed by
GitHub
commit
5b711f38d1
@ -0,0 +1,75 @@
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using System.Net;
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using Microsoft.AspNetCore.HttpOverrides;
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namespace Jellyfin.Networking.Constants;
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/// <summary>
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/// Networking constants.
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/// </summary>
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public static class Network
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{
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/// <summary>
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/// IPv4 mask bytes.
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/// </summary>
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public const int IPv4MaskBytes = 4;
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/// <summary>
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/// IPv6 mask bytes.
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/// </summary>
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public const int IPv6MaskBytes = 16;
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/// <summary>
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/// Minimum IPv4 prefix size.
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/// </summary>
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public const int MinimumIPv4PrefixSize = 32;
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/// <summary>
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/// Minimum IPv6 prefix size.
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/// </summary>
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public const int MinimumIPv6PrefixSize = 128;
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/// <summary>
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/// Whole IPv4 address space.
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/// </summary>
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public static readonly IPNetwork IPv4Any = new IPNetwork(IPAddress.Any, 0);
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/// <summary>
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/// Whole IPv6 address space.
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/// </summary>
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public static readonly IPNetwork IPv6Any = new IPNetwork(IPAddress.IPv6Any, 0);
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/// <summary>
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/// IPv4 Loopback as defined in RFC 5735.
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/// </summary>
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public static readonly IPNetwork IPv4RFC5735Loopback = new IPNetwork(IPAddress.Loopback, 8);
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/// <summary>
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/// IPv4 private class A as defined in RFC 1918.
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/// </summary>
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public static readonly IPNetwork IPv4RFC1918PrivateClassA = new IPNetwork(IPAddress.Parse("10.0.0.0"), 8);
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/// <summary>
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/// IPv4 private class B as defined in RFC 1918.
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/// </summary>
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public static readonly IPNetwork IPv4RFC1918PrivateClassB = new IPNetwork(IPAddress.Parse("172.16.0.0"), 12);
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/// <summary>
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/// IPv4 private class C as defined in RFC 1918.
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/// </summary>
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public static readonly IPNetwork IPv4RFC1918PrivateClassC = new IPNetwork(IPAddress.Parse("192.168.0.0"), 16);
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/// <summary>
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/// IPv6 loopback as defined in RFC 4291.
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/// </summary>
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public static readonly IPNetwork IPv6RFC4291Loopback = new IPNetwork(IPAddress.IPv6Loopback, 128);
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/// <summary>
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/// IPv6 site local as defined in RFC 4291.
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/// </summary>
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public static readonly IPNetwork IPv6RFC4291SiteLocal = new IPNetwork(IPAddress.Parse("fe80::"), 10);
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/// <summary>
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/// IPv6 unique local as defined in RFC 4193.
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/// </summary>
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public static readonly IPNetwork IPv6RFC4193UniqueLocal = new IPNetwork(IPAddress.Parse("fc00::"), 7);
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}
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@ -0,0 +1,344 @@
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Net;
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using System.Net.Sockets;
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using System.Text.RegularExpressions;
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using Jellyfin.Extensions;
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using Jellyfin.Networking.Constants;
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using Microsoft.AspNetCore.HttpOverrides;
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namespace Jellyfin.Networking.Extensions;
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/// <summary>
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/// Defines the <see cref="NetworkExtensions" />.
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/// </summary>
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public static partial class NetworkExtensions
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{
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// Use regular expression as CheckHostName isn't RFC5892 compliant.
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// Modified from gSkinner's expression at https://stackoverflow.com/questions/11809631/fully-qualified-domain-name-validation
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[GeneratedRegex(@"(?im)^(?!:\/\/)(?=.{1,255}$)((.{1,63}\.){0,127}(?![0-9]*$)[a-z0-9-]+\.?)(:(\d){1,5}){0,1}$", RegexOptions.IgnoreCase, "en-US")]
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private static partial Regex FqdnGeneratedRegex();
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/// <summary>
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/// Returns true if the IPAddress contains an IP6 Local link address.
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/// </summary>
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/// <param name="address">IPAddress object to check.</param>
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/// <returns>True if it is a local link address.</returns>
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/// <remarks>
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/// See https://stackoverflow.com/questions/6459928/explain-the-instance-properties-of-system-net-ipaddress
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/// it appears that the IPAddress.IsIPv6LinkLocal is out of date.
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/// </remarks>
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public static bool IsIPv6LinkLocal(IPAddress address)
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{
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ArgumentNullException.ThrowIfNull(address);
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if (address.IsIPv4MappedToIPv6)
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{
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address = address.MapToIPv4();
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}
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if (address.AddressFamily != AddressFamily.InterNetworkV6)
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{
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return false;
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}
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// GetAddressBytes
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Span<byte> octet = stackalloc byte[16];
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address.TryWriteBytes(octet, out _);
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uint word = (uint)(octet[0] << 8) + octet[1];
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return word >= 0xfe80 && word <= 0xfebf; // fe80::/10 :Local link.
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}
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/// <summary>
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/// Convert a subnet mask in CIDR notation to a dotted decimal string value. IPv4 only.
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/// </summary>
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/// <param name="cidr">Subnet mask in CIDR notation.</param>
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/// <param name="family">IPv4 or IPv6 family.</param>
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/// <returns>String value of the subnet mask in dotted decimal notation.</returns>
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public static IPAddress CidrToMask(byte cidr, AddressFamily family)
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{
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uint addr = 0xFFFFFFFF << ((family == AddressFamily.InterNetwork ? Network.MinimumIPv4PrefixSize : Network.MinimumIPv6PrefixSize) - cidr);
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addr = ((addr & 0xff000000) >> 24)
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| ((addr & 0x00ff0000) >> 8)
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| ((addr & 0x0000ff00) << 8)
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| ((addr & 0x000000ff) << 24);
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return new IPAddress(addr);
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}
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/// <summary>
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/// Convert a subnet mask in CIDR notation to a dotted decimal string value. IPv4 only.
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/// </summary>
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/// <param name="cidr">Subnet mask in CIDR notation.</param>
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/// <param name="family">IPv4 or IPv6 family.</param>
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/// <returns>String value of the subnet mask in dotted decimal notation.</returns>
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public static IPAddress CidrToMask(int cidr, AddressFamily family)
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{
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uint addr = 0xFFFFFFFF << ((family == AddressFamily.InterNetwork ? Network.MinimumIPv4PrefixSize : Network.MinimumIPv6PrefixSize) - cidr);
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addr = ((addr & 0xff000000) >> 24)
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| ((addr & 0x00ff0000) >> 8)
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| ((addr & 0x0000ff00) << 8)
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| ((addr & 0x000000ff) << 24);
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return new IPAddress(addr);
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}
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/// <summary>
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/// Convert a subnet mask to a CIDR. IPv4 only.
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/// https://stackoverflow.com/questions/36954345/get-cidr-from-netmask.
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/// </summary>
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/// <param name="mask">Subnet mask.</param>
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/// <returns>Byte CIDR representing the mask.</returns>
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public static byte MaskToCidr(IPAddress mask)
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{
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ArgumentNullException.ThrowIfNull(mask);
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byte cidrnet = 0;
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if (mask.Equals(IPAddress.Any))
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{
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return cidrnet;
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}
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// GetAddressBytes
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Span<byte> bytes = stackalloc byte[mask.AddressFamily == AddressFamily.InterNetwork ? Network.IPv4MaskBytes : Network.IPv6MaskBytes];
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if (!mask.TryWriteBytes(bytes, out var bytesWritten))
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{
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Console.WriteLine("Unable to write address bytes, only {bytesWritten} bytes written.");
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}
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var zeroed = false;
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for (var i = 0; i < bytes.Length; i++)
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{
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for (int v = bytes[i]; (v & 0xFF) != 0; v <<= 1)
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{
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if (zeroed)
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{
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// Invalid netmask.
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return (byte)~cidrnet;
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}
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if ((v & 0x80) == 0)
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{
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zeroed = true;
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}
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else
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{
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cidrnet++;
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}
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}
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}
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return cidrnet;
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}
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/// <summary>
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/// Converts an IPAddress into a string.
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/// IPv6 addresses are returned in [ ], with their scope removed.
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/// </summary>
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/// <param name="address">Address to convert.</param>
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/// <returns>URI safe conversion of the address.</returns>
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public static string FormatIPString(IPAddress? address)
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{
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if (address is null)
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{
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return string.Empty;
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}
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var str = address.ToString();
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if (address.AddressFamily == AddressFamily.InterNetworkV6)
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{
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int i = str.IndexOf('%', StringComparison.Ordinal);
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if (i != -1)
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{
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str = str.Substring(0, i);
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}
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return $"[{str}]";
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}
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return str;
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}
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/// <summary>
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/// Try parsing an array of strings into <see cref="IPNetwork"/> objects, respecting exclusions.
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/// Elements without a subnet mask will be represented as <see cref="IPNetwork"/> with a single IP.
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/// </summary>
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/// <param name="values">Input string array to be parsed.</param>
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/// <param name="result">Collection of <see cref="IPNetwork"/>.</param>
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/// <param name="negated">Boolean signaling if negated or not negated values should be parsed.</param>
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/// <returns><c>True</c> if parsing was successful.</returns>
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public static bool TryParseToSubnets(string[] values, [NotNullWhen(true)] out IReadOnlyList<IPNetwork>? result, bool negated = false)
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{
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if (values is null || values.Length == 0)
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{
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result = null;
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return false;
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}
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var tmpResult = new List<IPNetwork>();
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for (int a = 0; a < values.Length; a++)
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{
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if (TryParseToSubnet(values[a], out var innerResult, negated))
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{
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tmpResult.Add(innerResult);
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}
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}
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result = tmpResult;
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return tmpResult.Count > 0;
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}
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/// <summary>
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/// Try parsing a string into an <see cref="IPNetwork"/>, respecting exclusions.
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/// Inputs without a subnet mask will be represented as <see cref="IPNetwork"/> with a single IP.
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/// </summary>
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/// <param name="value">Input string to be parsed.</param>
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/// <param name="result">An <see cref="IPNetwork"/>.</param>
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/// <param name="negated">Boolean signaling if negated or not negated values should be parsed.</param>
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/// <returns><c>True</c> if parsing was successful.</returns>
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public static bool TryParseToSubnet(ReadOnlySpan<char> value, [NotNullWhen(true)] out IPNetwork? result, bool negated = false)
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{
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var splitString = value.Trim().Split('/');
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if (splitString.MoveNext())
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{
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var ipBlock = splitString.Current;
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var address = IPAddress.None;
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if (negated && ipBlock.StartsWith<char>("!") && IPAddress.TryParse(ipBlock[1..], out var tmpAddress))
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{
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address = tmpAddress;
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}
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else if (!negated && IPAddress.TryParse(ipBlock, out tmpAddress))
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{
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address = tmpAddress;
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}
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if (address != IPAddress.None)
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{
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if (splitString.MoveNext())
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{
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var subnetBlock = splitString.Current;
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if (int.TryParse(subnetBlock, out var netmask))
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{
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result = new IPNetwork(address, netmask);
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return true;
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}
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else if (IPAddress.TryParse(subnetBlock, out var netmaskAddress))
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{
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result = new IPNetwork(address, NetworkExtensions.MaskToCidr(netmaskAddress));
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return true;
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}
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}
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else if (address.AddressFamily == AddressFamily.InterNetwork)
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{
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result = new IPNetwork(address, Network.MinimumIPv4PrefixSize);
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return true;
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}
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else if (address.AddressFamily == AddressFamily.InterNetworkV6)
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{
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result = new IPNetwork(address, Network.MinimumIPv6PrefixSize);
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return true;
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}
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}
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}
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result = null;
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return false;
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}
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/// <summary>
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/// Attempts to parse a host span.
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/// </summary>
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/// <param name="host">Host name to parse.</param>
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/// <param name="addresses">Object representing the span, if it has successfully been parsed.</param>
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/// <param name="isIPv4Enabled"><c>true</c> if IPv4 is enabled.</param>
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/// <param name="isIPv6Enabled"><c>true</c> if IPv6 is enabled.</param>
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/// <returns><c>true</c> if the parsing is successful, <c>false</c> if not.</returns>
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public static bool TryParseHost(ReadOnlySpan<char> host, [NotNullWhen(true)] out IPAddress[]? addresses, bool isIPv4Enabled = true, bool isIPv6Enabled = false)
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{
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host = host.Trim();
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if (host.IsEmpty)
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{
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addresses = null;
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return false;
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}
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// See if it's an IPv6 with port address e.g. [::1] or [::1]:120.
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if (host[0] == '[')
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{
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int i = host.IndexOf(']');
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if (i != -1)
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{
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return TryParseHost(host[1..(i - 1)], out addresses);
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}
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addresses = Array.Empty<IPAddress>();
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return false;
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}
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var hosts = new List<string>();
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foreach (var splitSpan in host.Split(':'))
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{
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hosts.Add(splitSpan.ToString());
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}
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if (hosts.Count <= 2)
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{
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// Is hostname or hostname:port
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if (FqdnGeneratedRegex().IsMatch(hosts[0]))
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{
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try
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{
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addresses = Dns.GetHostAddresses(hosts[0]);
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return true;
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}
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catch (SocketException)
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{
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// Ignore socket errors, as the result value will just be an empty array.
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}
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}
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// Is an IPv4 or IPv4:port
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if (IPAddress.TryParse(hosts[0].AsSpan().LeftPart('/'), out var address))
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{
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if (((address.AddressFamily == AddressFamily.InterNetwork) && (!isIPv4Enabled && isIPv6Enabled))
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|| ((address.AddressFamily == AddressFamily.InterNetworkV6) && (isIPv4Enabled && !isIPv6Enabled)))
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{
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addresses = Array.Empty<IPAddress>();
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return false;
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}
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addresses = new[] { address };
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// Host name is an IPv4 address, so fake resolve.
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return true;
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}
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}
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else if (hosts.Count > 0 && hosts.Count <= 9) // 8 octets + port
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{
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if (IPAddress.TryParse(host.LeftPart('/'), out var address))
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{
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addresses = new[] { address };
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return true;
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}
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}
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addresses = Array.Empty<IPAddress>();
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return false;
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}
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/// <summary>
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/// Gets the broadcast address for a <see cref="IPNetwork"/>.
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/// </summary>
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/// <param name="network">The <see cref="IPNetwork"/>.</param>
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/// <returns>The broadcast address.</returns>
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public static IPAddress GetBroadcastAddress(IPNetwork network)
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{
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var addressBytes = network.Prefix.GetAddressBytes();
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uint ipAddress = BitConverter.ToUInt32(addressBytes, 0);
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uint ipMaskV4 = BitConverter.ToUInt32(CidrToMask(network.PrefixLength, AddressFamily.InterNetwork).GetAddressBytes(), 0);
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uint broadCastIPAddress = ipAddress | ~ipMaskV4;
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return new IPAddress(BitConverter.GetBytes(broadCastIPAddress));
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}
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}
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@ -1,350 +0,0 @@
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using System;
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using System.Collections.Generic;
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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));
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue