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2009 lines
58 KiB
2009 lines
58 KiB
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Net;
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using System.Net.Sockets;
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using System.Numerics;
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using System.Text.RegularExpressions;
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namespace Emby.Server.Implementations.Networking.IPNetwork
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{
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/// <summary>
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/// IP Network utility class.
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/// Use IPNetwork.Parse to create instances.
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/// </summary>
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public class IPNetwork : IComparable<IPNetwork>
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{
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#region properties
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//private uint _network;
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private BigInteger _ipaddress;
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private AddressFamily _family;
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//private uint _netmask;
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//private uint _broadcast;
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//private uint _firstUsable;
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//private uint _lastUsable;
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//private uint _usable;
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private byte _cidr;
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#endregion
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#region accessors
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private BigInteger _network
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{
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get
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{
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var uintNetwork = this._ipaddress & this._netmask;
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return uintNetwork;
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}
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}
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/// <summary>
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/// Network address
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/// </summary>
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public IPAddress Network => IPNetwork.ToIPAddress(this._network, this._family);
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/// <summary>
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/// Address Family
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/// </summary>
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public AddressFamily AddressFamily => this._family;
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private BigInteger _netmask => IPNetwork.ToUint(this._cidr, this._family);
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/// <summary>
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/// Netmask
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/// </summary>
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public IPAddress Netmask => IPNetwork.ToIPAddress(this._netmask, this._family);
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private BigInteger _broadcast
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{
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get
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{
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int width = this._family == System.Net.Sockets.AddressFamily.InterNetwork ? 4 : 16;
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var uintBroadcast = this._network + this._netmask.PositiveReverse(width);
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return uintBroadcast;
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}
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}
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/// <summary>
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/// Broadcast address
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/// </summary>
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public IPAddress Broadcast
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{
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get
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{
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if (this._family == System.Net.Sockets.AddressFamily.InterNetworkV6)
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{
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return null;
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}
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return IPNetwork.ToIPAddress(this._broadcast, this._family);
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}
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}
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/// <summary>
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/// First usable IP adress in Network
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/// </summary>
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public IPAddress FirstUsable
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{
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get
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{
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var fisrt = this._family == System.Net.Sockets.AddressFamily.InterNetworkV6
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? this._network
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: (this.Usable <= 0) ? this._network : this._network + 1;
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return IPNetwork.ToIPAddress(fisrt, this._family);
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}
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}
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/// <summary>
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/// Last usable IP adress in Network
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/// </summary>
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public IPAddress LastUsable
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{
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get
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{
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var last = this._family == System.Net.Sockets.AddressFamily.InterNetworkV6
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? this._broadcast
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: (this.Usable <= 0) ? this._network : this._broadcast - 1;
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return IPNetwork.ToIPAddress(last, this._family);
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}
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}
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/// <summary>
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/// Number of usable IP adress in Network
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/// </summary>
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public BigInteger Usable
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{
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get
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{
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if (this._family == System.Net.Sockets.AddressFamily.InterNetworkV6)
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{
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return this.Total;
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}
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byte[] mask = new byte[] { 0xff, 0xff, 0xff, 0xff, 0x00 };
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var bmask = new BigInteger(mask);
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var usableIps = (_cidr > 30) ? 0 : ((bmask >> _cidr) - 1);
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return usableIps;
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}
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}
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/// <summary>
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/// Number of IP adress in Network
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/// </summary>
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public BigInteger Total
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{
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get
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{
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int max = this._family == System.Net.Sockets.AddressFamily.InterNetwork ? 32 : 128;
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var count = BigInteger.Pow(2, (max - _cidr));
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return count;
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}
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}
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/// <summary>
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/// The CIDR netmask notation
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/// </summary>
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public byte Cidr => this._cidr;
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#endregion
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#region constructor
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#if TRAVISCI
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public
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#else
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internal
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#endif
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IPNetwork(BigInteger ipaddress, AddressFamily family, byte cidr)
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{
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int maxCidr = family == System.Net.Sockets.AddressFamily.InterNetwork ? 32 : 128;
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if (cidr > maxCidr)
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{
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throw new ArgumentOutOfRangeException(nameof(cidr));
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}
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this._ipaddress = ipaddress;
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this._family = family;
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this._cidr = cidr;
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}
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#endregion
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#region parsers
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/// <summary>
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/// 192.168.168.100 - 255.255.255.0
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="netmask"></param>
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/// <returns></returns>
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public static IPNetwork Parse(string ipaddress, string netmask)
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{
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IPNetwork ipnetwork = null;
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IPNetwork.InternalParse(false, ipaddress, netmask, out ipnetwork);
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return ipnetwork;
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}
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/// <summary>
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/// 192.168.168.100/24
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="cidr"></param>
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/// <returns></returns>
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public static IPNetwork Parse(string ipaddress, byte cidr)
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{
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IPNetwork ipnetwork = null;
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IPNetwork.InternalParse(false, ipaddress, cidr, out ipnetwork);
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return ipnetwork;
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}
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/// <summary>
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/// 192.168.168.100 255.255.255.0
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="netmask"></param>
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/// <returns></returns>
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public static IPNetwork Parse(IPAddress ipaddress, IPAddress netmask)
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{
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IPNetwork ipnetwork = null;
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IPNetwork.InternalParse(false, ipaddress, netmask, out ipnetwork);
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return ipnetwork;
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}
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/// <summary>
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/// 192.168.0.1/24
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/// 192.168.0.1 255.255.255.0
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///
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/// Network : 192.168.0.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.0.1
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/// End : 192.168.0.254
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/// Broadcast : 192.168.0.255
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/// </summary>
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/// <param name="network"></param>
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/// <returns></returns>
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public static IPNetwork Parse(string network)
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{
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IPNetwork ipnetwork = null;
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IPNetwork.InternalParse(false, network, out ipnetwork);
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return ipnetwork;
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}
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#endregion
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#region TryParse
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/// <summary>
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/// 192.168.168.100 - 255.255.255.0
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="netmask"></param>
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/// <returns></returns>
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public static bool TryParse(string ipaddress, string netmask, out IPNetwork ipnetwork)
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{
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IPNetwork ipnetwork2 = null;
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IPNetwork.InternalParse(true, ipaddress, netmask, out ipnetwork2);
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bool parsed = (ipnetwork2 != null);
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ipnetwork = ipnetwork2;
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return parsed;
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}
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/// <summary>
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/// 192.168.168.100/24
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="cidr"></param>
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/// <returns></returns>
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public static bool TryParse(string ipaddress, byte cidr, out IPNetwork ipnetwork)
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{
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IPNetwork ipnetwork2 = null;
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IPNetwork.InternalParse(true, ipaddress, cidr, out ipnetwork2);
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bool parsed = (ipnetwork2 != null);
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ipnetwork = ipnetwork2;
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return parsed;
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}
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/// <summary>
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/// 192.168.0.1/24
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/// 192.168.0.1 255.255.255.0
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///
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/// Network : 192.168.0.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.0.1
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/// End : 192.168.0.254
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/// Broadcast : 192.168.0.255
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/// </summary>
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/// <param name="network"></param>
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/// <param name="ipnetwork"></param>
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/// <returns></returns>
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public static bool TryParse(string network, out IPNetwork ipnetwork)
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{
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IPNetwork ipnetwork2 = null;
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IPNetwork.InternalParse(true, network, out ipnetwork2);
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bool parsed = (ipnetwork2 != null);
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ipnetwork = ipnetwork2;
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return parsed;
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}
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/// <summary>
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/// 192.168.0.1/24
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/// 192.168.0.1 255.255.255.0
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///
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/// Network : 192.168.0.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.0.1
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/// End : 192.168.0.254
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/// Broadcast : 192.168.0.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="netmask"></param>
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/// <param name="ipnetwork"></param>
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/// <returns></returns>
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public static bool TryParse(IPAddress ipaddress, IPAddress netmask, out IPNetwork ipnetwork)
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{
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IPNetwork ipnetwork2 = null;
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IPNetwork.InternalParse(true, ipaddress, netmask, out ipnetwork2);
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bool parsed = (ipnetwork2 != null);
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ipnetwork = ipnetwork2;
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return parsed;
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}
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#endregion
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#region InternalParse
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/// <summary>
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/// 192.168.168.100 - 255.255.255.0
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="netmask"></param>
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/// <returns></returns>
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private static void InternalParse(bool tryParse, string ipaddress, string netmask, out IPNetwork ipnetwork)
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{
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if (string.IsNullOrEmpty(ipaddress))
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{
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if (tryParse == false)
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{
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throw new ArgumentNullException(nameof(ipaddress));
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}
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ipnetwork = null;
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return;
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}
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if (string.IsNullOrEmpty(netmask))
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{
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if (tryParse == false)
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{
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throw new ArgumentNullException(nameof(netmask));
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}
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ipnetwork = null;
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return;
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}
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IPAddress ip = null;
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bool ipaddressParsed = IPAddress.TryParse(ipaddress, out ip);
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if (ipaddressParsed == false)
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{
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if (tryParse == false)
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{
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throw new ArgumentException("ipaddress");
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}
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ipnetwork = null;
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return;
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}
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IPAddress mask = null;
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bool netmaskParsed = IPAddress.TryParse(netmask, out mask);
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if (netmaskParsed == false)
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{
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if (tryParse == false)
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{
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throw new ArgumentException("netmask");
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}
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ipnetwork = null;
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return;
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}
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IPNetwork.InternalParse(tryParse, ip, mask, out ipnetwork);
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}
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private static void InternalParse(bool tryParse, string network, out IPNetwork ipnetwork)
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{
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if (string.IsNullOrEmpty(network))
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{
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if (tryParse == false)
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{
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throw new ArgumentNullException(nameof(network));
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}
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ipnetwork = null;
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return;
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}
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network = Regex.Replace(network, @"[^0-9a-fA-F\.\/\s\:]+", "");
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network = Regex.Replace(network, @"\s{2,}", " ");
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network = network.Trim();
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string[] args = network.Split(new char[] { ' ', '/' });
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byte cidr = 0;
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if (args.Length == 1)
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{
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if (IPNetwork.TryGuessCidr(args[0], out cidr))
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{
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IPNetwork.InternalParse(tryParse, args[0], cidr, out ipnetwork);
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return;
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}
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if (tryParse == false)
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{
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throw new ArgumentException("network");
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}
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ipnetwork = null;
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return;
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}
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if (byte.TryParse(args[1], out cidr))
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{
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IPNetwork.InternalParse(tryParse, args[0], cidr, out ipnetwork);
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return;
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}
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IPNetwork.InternalParse(tryParse, args[0], args[1], out ipnetwork);
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return;
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}
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/// <summary>
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/// 192.168.168.100 255.255.255.0
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="netmask"></param>
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/// <returns></returns>
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private static void InternalParse(bool tryParse, IPAddress ipaddress, IPAddress netmask, out IPNetwork ipnetwork)
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{
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if (ipaddress == null)
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{
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if (tryParse == false)
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{
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throw new ArgumentNullException(nameof(ipaddress));
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}
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ipnetwork = null;
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return;
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}
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if (netmask == null)
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{
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if (tryParse == false)
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{
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throw new ArgumentNullException(nameof(netmask));
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}
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ipnetwork = null;
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return;
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}
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var uintIpAddress = IPNetwork.ToBigInteger(ipaddress);
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bool parsed = IPNetwork.TryToCidr(netmask, out var cidr2);
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if (parsed == false)
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{
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if (tryParse == false)
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{
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throw new ArgumentException("netmask");
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}
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ipnetwork = null;
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return;
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}
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byte cidr = (byte)cidr2;
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var ipnet = new IPNetwork(uintIpAddress, ipaddress.AddressFamily, cidr);
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ipnetwork = ipnet;
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return;
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}
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/// <summary>
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/// 192.168.168.100/24
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///
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/// Network : 192.168.168.0
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/// Netmask : 255.255.255.0
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/// Cidr : 24
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/// Start : 192.168.168.1
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/// End : 192.168.168.254
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/// Broadcast : 192.168.168.255
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/// </summary>
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/// <param name="ipaddress"></param>
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/// <param name="cidr"></param>
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/// <returns></returns>
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private static void InternalParse(bool tryParse, string ipaddress, byte cidr, out IPNetwork ipnetwork)
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{
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if (string.IsNullOrEmpty(ipaddress))
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{
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if (tryParse == false)
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{
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throw new ArgumentNullException(nameof(ipaddress));
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}
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ipnetwork = null;
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return;
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}
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IPAddress ip = null;
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bool ipaddressParsed = IPAddress.TryParse(ipaddress, out ip);
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if (ipaddressParsed == false)
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{
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if (tryParse == false)
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{
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throw new ArgumentException("ipaddress");
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}
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ipnetwork = null;
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return;
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}
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IPAddress mask = null;
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bool parsedNetmask = IPNetwork.TryToNetmask(cidr, ip.AddressFamily, out mask);
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if (parsedNetmask == false)
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{
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if (tryParse == false)
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{
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throw new ArgumentException("cidr");
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}
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ipnetwork = null;
|
|
return;
|
|
}
|
|
|
|
|
|
IPNetwork.InternalParse(tryParse, ip, mask, out ipnetwork);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region converters
|
|
|
|
#region ToUint
|
|
|
|
/// <summary>
|
|
/// Convert an ipadress to decimal
|
|
/// 0.0.0.0 -> 0
|
|
/// 0.0.1.0 -> 256
|
|
/// </summary>
|
|
/// <param name="ipaddress"></param>
|
|
/// <returns></returns>
|
|
public static BigInteger ToBigInteger(IPAddress ipaddress)
|
|
{
|
|
IPNetwork.InternalToBigInteger(false, ipaddress, out var uintIpAddress);
|
|
return (BigInteger)uintIpAddress;
|
|
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert an ipadress to decimal
|
|
/// 0.0.0.0 -> 0
|
|
/// 0.0.1.0 -> 256
|
|
/// </summary>
|
|
/// <param name="ipaddress"></param>
|
|
/// <returns></returns>
|
|
public static bool TryToBigInteger(IPAddress ipaddress, out BigInteger? uintIpAddress)
|
|
{
|
|
IPNetwork.InternalToBigInteger(true, ipaddress, out var uintIpAddress2);
|
|
bool parsed = (uintIpAddress2 != null);
|
|
uintIpAddress = uintIpAddress2;
|
|
return parsed;
|
|
}
|
|
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static void InternalToBigInteger(bool tryParse, IPAddress ipaddress, out BigInteger? uintIpAddress)
|
|
{
|
|
|
|
if (ipaddress == null)
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new ArgumentNullException(nameof(ipaddress));
|
|
}
|
|
uintIpAddress = null;
|
|
return;
|
|
}
|
|
|
|
byte[] bytes = ipaddress.GetAddressBytes();
|
|
/// 20180217 lduchosal
|
|
/// code impossible to reach, GetAddressBytes returns either 4 or 16 bytes length addresses
|
|
/// if (bytes.Length != 4 && bytes.Length != 16) {
|
|
/// if (tryParse == false) {
|
|
/// throw new ArgumentException("bytes");
|
|
/// }
|
|
/// uintIpAddress = null;
|
|
/// return;
|
|
/// }
|
|
|
|
Array.Reverse(bytes);
|
|
var unsigned = new List<byte>(bytes);
|
|
unsigned.Add(0);
|
|
uintIpAddress = new BigInteger(unsigned.ToArray());
|
|
return;
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
/// Convert a cidr to BigInteger netmask
|
|
/// </summary>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public static BigInteger ToUint(byte cidr, AddressFamily family)
|
|
{
|
|
IPNetwork.InternalToBigInteger(false, cidr, family, out var uintNetmask);
|
|
return (BigInteger)uintNetmask;
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
/// Convert a cidr to uint netmask
|
|
/// </summary>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public static bool TryToUint(byte cidr, AddressFamily family, out BigInteger? uintNetmask)
|
|
{
|
|
IPNetwork.InternalToBigInteger(true, cidr, family, out var uintNetmask2);
|
|
bool parsed = (uintNetmask2 != null);
|
|
uintNetmask = uintNetmask2;
|
|
return parsed;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert a cidr to uint netmask
|
|
/// </summary>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static void InternalToBigInteger(bool tryParse, byte cidr, AddressFamily family, out BigInteger? uintNetmask)
|
|
{
|
|
|
|
if (family == AddressFamily.InterNetwork && cidr > 32)
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(cidr));
|
|
}
|
|
uintNetmask = null;
|
|
return;
|
|
}
|
|
|
|
if (family == AddressFamily.InterNetworkV6 && cidr > 128)
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(cidr));
|
|
}
|
|
uintNetmask = null;
|
|
return;
|
|
}
|
|
|
|
if (family != AddressFamily.InterNetwork
|
|
&& family != AddressFamily.InterNetworkV6)
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new NotSupportedException(family.ToString());
|
|
}
|
|
uintNetmask = null;
|
|
return;
|
|
}
|
|
|
|
if (family == AddressFamily.InterNetwork)
|
|
{
|
|
|
|
uintNetmask = cidr == 0 ? 0 : 0xffffffff << (32 - cidr);
|
|
return;
|
|
}
|
|
|
|
var mask = new BigInteger(new byte[] {
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0x00
|
|
});
|
|
|
|
var masked = cidr == 0 ? 0 : mask << (128 - cidr);
|
|
byte[] m = masked.ToByteArray();
|
|
byte[] bmask = new byte[17];
|
|
int copy = m.Length > 16 ? 16 : m.Length;
|
|
Array.Copy(m, 0, bmask, 0, copy);
|
|
uintNetmask = new BigInteger(bmask);
|
|
|
|
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region ToCidr
|
|
|
|
/// <summary>
|
|
/// Convert netmask to CIDR
|
|
/// 255.255.255.0 -> 24
|
|
/// 255.255.0.0 -> 16
|
|
/// 255.0.0.0 -> 8
|
|
/// </summary>
|
|
/// <param name="netmask"></param>
|
|
/// <returns></returns>
|
|
private static void InternalToCidr(bool tryParse, BigInteger netmask, AddressFamily family, out byte? cidr)
|
|
{
|
|
|
|
if (!IPNetwork.InternalValidNetmask(netmask, family))
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new ArgumentException("netmask");
|
|
}
|
|
cidr = null;
|
|
return;
|
|
}
|
|
|
|
byte cidr2 = IPNetwork.BitsSet(netmask, family);
|
|
cidr = cidr2;
|
|
return;
|
|
|
|
}
|
|
/// <summary>
|
|
/// Convert netmask to CIDR
|
|
/// 255.255.255.0 -> 24
|
|
/// 255.255.0.0 -> 16
|
|
/// 255.0.0.0 -> 8
|
|
/// </summary>
|
|
/// <param name="netmask"></param>
|
|
/// <returns></returns>
|
|
public static byte ToCidr(IPAddress netmask)
|
|
{
|
|
IPNetwork.InternalToCidr(false, netmask, out var cidr);
|
|
return (byte)cidr;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert netmask to CIDR
|
|
/// 255.255.255.0 -> 24
|
|
/// 255.255.0.0 -> 16
|
|
/// 255.0.0.0 -> 8
|
|
/// </summary>
|
|
/// <param name="netmask"></param>
|
|
/// <returns></returns>
|
|
public static bool TryToCidr(IPAddress netmask, out byte? cidr)
|
|
{
|
|
IPNetwork.InternalToCidr(true, netmask, out var cidr2);
|
|
bool parsed = (cidr2 != null);
|
|
cidr = cidr2;
|
|
return parsed;
|
|
}
|
|
|
|
private static void InternalToCidr(bool tryParse, IPAddress netmask, out byte? cidr)
|
|
{
|
|
|
|
if (netmask == null)
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new ArgumentNullException(nameof(netmask));
|
|
}
|
|
cidr = null;
|
|
return;
|
|
}
|
|
|
|
bool parsed = IPNetwork.TryToBigInteger(netmask, out var uintNetmask2);
|
|
|
|
/// 20180217 lduchosal
|
|
/// impossible to reach code.
|
|
/// if (parsed == false) {
|
|
/// if (tryParse == false) {
|
|
/// throw new ArgumentException("netmask");
|
|
/// }
|
|
/// cidr = null;
|
|
/// return;
|
|
/// }
|
|
var uintNetmask = (BigInteger)uintNetmask2;
|
|
|
|
IPNetwork.InternalToCidr(tryParse, uintNetmask, netmask.AddressFamily, out var cidr2);
|
|
cidr = cidr2;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
#region ToNetmask
|
|
|
|
/// <summary>
|
|
/// Convert CIDR to netmask
|
|
/// 24 -> 255.255.255.0
|
|
/// 16 -> 255.255.0.0
|
|
/// 8 -> 255.0.0.0
|
|
/// </summary>
|
|
/// <see cref="http://snipplr.com/view/15557/cidr-class-for-ipv4/"/>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public static IPAddress ToNetmask(byte cidr, AddressFamily family)
|
|
{
|
|
|
|
IPAddress netmask = null;
|
|
IPNetwork.InternalToNetmask(false, cidr, family, out netmask);
|
|
return netmask;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert CIDR to netmask
|
|
/// 24 -> 255.255.255.0
|
|
/// 16 -> 255.255.0.0
|
|
/// 8 -> 255.0.0.0
|
|
/// </summary>
|
|
/// <see cref="http://snipplr.com/view/15557/cidr-class-for-ipv4/"/>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public static bool TryToNetmask(byte cidr, AddressFamily family, out IPAddress netmask)
|
|
{
|
|
|
|
IPAddress netmask2 = null;
|
|
IPNetwork.InternalToNetmask(true, cidr, family, out netmask2);
|
|
bool parsed = (netmask2 != null);
|
|
netmask = netmask2;
|
|
return parsed;
|
|
}
|
|
|
|
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static void InternalToNetmask(bool tryParse, byte cidr, AddressFamily family, out IPAddress netmask)
|
|
{
|
|
|
|
if (family != AddressFamily.InterNetwork
|
|
&& family != AddressFamily.InterNetworkV6)
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new ArgumentException("family");
|
|
}
|
|
netmask = null;
|
|
return;
|
|
}
|
|
|
|
/// 20180217 lduchosal
|
|
/// impossible to reach code, byte cannot be negative :
|
|
///
|
|
/// if (cidr < 0) {
|
|
/// if (tryParse == false) {
|
|
/// throw new ArgumentOutOfRangeException("cidr");
|
|
/// }
|
|
/// netmask = null;
|
|
/// return;
|
|
/// }
|
|
|
|
int maxCidr = family == System.Net.Sockets.AddressFamily.InterNetwork ? 32 : 128;
|
|
if (cidr > maxCidr)
|
|
{
|
|
if (tryParse == false)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(cidr));
|
|
}
|
|
netmask = null;
|
|
return;
|
|
}
|
|
|
|
var mask = IPNetwork.ToUint(cidr, family);
|
|
var netmask2 = IPNetwork.ToIPAddress(mask, family);
|
|
netmask = netmask2;
|
|
|
|
return;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#endregion
|
|
|
|
#region utils
|
|
|
|
#region BitsSet
|
|
|
|
/// <summary>
|
|
/// Count bits set to 1 in netmask
|
|
/// </summary>
|
|
/// <see cref="http://stackoverflow.com/questions/109023/best-algorithm-to-count-the-number-of-set-bits-in-a-32-bit-integer"/>
|
|
/// <param name="netmask"></param>
|
|
/// <returns></returns>
|
|
private static byte BitsSet(BigInteger netmask, AddressFamily family)
|
|
{
|
|
|
|
string s = netmask.ToBinaryString();
|
|
return (byte)s.Replace("0", "")
|
|
.ToCharArray()
|
|
.Length;
|
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
/// Count bits set to 1 in netmask
|
|
/// </summary>
|
|
/// <param name="netmask"></param>
|
|
/// <returns></returns>
|
|
public static uint BitsSet(IPAddress netmask)
|
|
{
|
|
var uintNetmask = IPNetwork.ToBigInteger(netmask);
|
|
uint bits = IPNetwork.BitsSet(uintNetmask, netmask.AddressFamily);
|
|
return bits;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region ValidNetmask
|
|
|
|
/// <summary>
|
|
/// return true if netmask is a valid netmask
|
|
/// 255.255.255.0, 255.0.0.0, 255.255.240.0, ...
|
|
/// </summary>
|
|
/// <see cref="http://www.actionsnip.com/snippets/tomo_atlacatl/calculate-if-a-netmask-is-valid--as2-"/>
|
|
/// <param name="netmask"></param>
|
|
/// <returns></returns>
|
|
public static bool ValidNetmask(IPAddress netmask)
|
|
{
|
|
|
|
if (netmask == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(netmask));
|
|
}
|
|
var uintNetmask = IPNetwork.ToBigInteger(netmask);
|
|
bool valid = IPNetwork.InternalValidNetmask(uintNetmask, netmask.AddressFamily);
|
|
return valid;
|
|
}
|
|
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static bool InternalValidNetmask(BigInteger netmask, AddressFamily family)
|
|
{
|
|
|
|
if (family != AddressFamily.InterNetwork
|
|
&& family != AddressFamily.InterNetworkV6)
|
|
{
|
|
throw new ArgumentException("family");
|
|
}
|
|
|
|
var mask = family == AddressFamily.InterNetwork
|
|
? new BigInteger(0x0ffffffff)
|
|
: new BigInteger(new byte[]{
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff,
|
|
0x00
|
|
});
|
|
|
|
var neg = ((~netmask) & (mask));
|
|
bool isNetmask = ((neg + 1) & neg) == 0;
|
|
return isNetmask;
|
|
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region ToIPAddress
|
|
|
|
/// <summary>
|
|
/// Transform a uint ipaddress into IPAddress object
|
|
/// </summary>
|
|
/// <param name="ipaddress"></param>
|
|
/// <returns></returns>
|
|
public static IPAddress ToIPAddress(BigInteger ipaddress, AddressFamily family)
|
|
{
|
|
|
|
int width = family == AddressFamily.InterNetwork ? 4 : 16;
|
|
byte[] bytes = ipaddress.ToByteArray();
|
|
byte[] bytes2 = new byte[width];
|
|
int copy = bytes.Length > width ? width : bytes.Length;
|
|
Array.Copy(bytes, 0, bytes2, 0, copy);
|
|
Array.Reverse(bytes2);
|
|
|
|
byte[] sized = Resize(bytes2, family);
|
|
var ip = new IPAddress(sized);
|
|
return ip;
|
|
}
|
|
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static byte[] Resize(byte[] bytes, AddressFamily family)
|
|
{
|
|
|
|
if (family != AddressFamily.InterNetwork
|
|
&& family != AddressFamily.InterNetworkV6)
|
|
{
|
|
throw new ArgumentException("family");
|
|
}
|
|
|
|
int width = family == AddressFamily.InterNetwork ? 4 : 16;
|
|
|
|
if (bytes.Length > width)
|
|
{
|
|
throw new ArgumentException("bytes");
|
|
}
|
|
|
|
byte[] result = new byte[width];
|
|
Array.Copy(bytes, 0, result, 0, bytes.Length);
|
|
return result;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#endregion
|
|
|
|
#region contains
|
|
|
|
/// <summary>
|
|
/// return true if ipaddress is contained in network
|
|
/// </summary>
|
|
/// <param name="ipaddress"></param>
|
|
/// <returns></returns>
|
|
public bool Contains(IPAddress ipaddress)
|
|
{
|
|
|
|
if (ipaddress == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(ipaddress));
|
|
}
|
|
|
|
if (AddressFamily != ipaddress.AddressFamily)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var uintNetwork = _network;
|
|
var uintBroadcast = _broadcast;
|
|
var uintAddress = IPNetwork.ToBigInteger(ipaddress);
|
|
|
|
bool contains = (uintAddress >= uintNetwork
|
|
&& uintAddress <= uintBroadcast);
|
|
|
|
return contains;
|
|
|
|
}
|
|
|
|
/// <summary>
|
|
/// return true is network2 is fully contained in network
|
|
/// </summary>
|
|
/// <param name="network2"></param>
|
|
/// <returns></returns>
|
|
public bool Contains(IPNetwork network2)
|
|
{
|
|
|
|
if (network2 == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(network2));
|
|
}
|
|
|
|
var uintNetwork = _network;
|
|
var uintBroadcast = _broadcast;
|
|
|
|
var uintFirst = network2._network;
|
|
var uintLast = network2._broadcast;
|
|
|
|
bool contains = (uintFirst >= uintNetwork
|
|
&& uintLast <= uintBroadcast);
|
|
|
|
return contains;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region overlap
|
|
|
|
/// <summary>
|
|
/// return true is network2 overlap network
|
|
/// </summary>
|
|
/// <param name="network2"></param>
|
|
/// <returns></returns>
|
|
public bool Overlap(IPNetwork network2)
|
|
{
|
|
|
|
if (network2 == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(network2));
|
|
}
|
|
|
|
var uintNetwork = _network;
|
|
var uintBroadcast = _broadcast;
|
|
|
|
var uintFirst = network2._network;
|
|
var uintLast = network2._broadcast;
|
|
|
|
bool overlap =
|
|
(uintFirst >= uintNetwork && uintFirst <= uintBroadcast)
|
|
|| (uintLast >= uintNetwork && uintLast <= uintBroadcast)
|
|
|| (uintFirst <= uintNetwork && uintLast >= uintBroadcast)
|
|
|| (uintFirst >= uintNetwork && uintLast <= uintBroadcast);
|
|
|
|
return overlap;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region ToString
|
|
|
|
public override string ToString()
|
|
{
|
|
return string.Format("{0}/{1}", this.Network, this.Cidr);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region IANA block
|
|
|
|
private static readonly Lazy<IPNetwork> _iana_ablock_reserved = new Lazy<IPNetwork>(() => IPNetwork.Parse("10.0.0.0/8"));
|
|
private static readonly Lazy<IPNetwork> _iana_bblock_reserved = new Lazy<IPNetwork>(() => IPNetwork.Parse("172.16.0.0/12"));
|
|
private static readonly Lazy<IPNetwork> _iana_cblock_reserved = new Lazy<IPNetwork>(() => IPNetwork.Parse("192.168.0.0/16"));
|
|
|
|
/// <summary>
|
|
/// 10.0.0.0/8
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public static IPNetwork IANA_ABLK_RESERVED1 => _iana_ablock_reserved.Value;
|
|
|
|
/// <summary>
|
|
/// 172.12.0.0/12
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public static IPNetwork IANA_BBLK_RESERVED1 => _iana_bblock_reserved.Value;
|
|
|
|
/// <summary>
|
|
/// 192.168.0.0/16
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public static IPNetwork IANA_CBLK_RESERVED1 => _iana_cblock_reserved.Value;
|
|
|
|
/// <summary>
|
|
/// return true if ipaddress is contained in
|
|
/// IANA_ABLK_RESERVED1, IANA_BBLK_RESERVED1, IANA_CBLK_RESERVED1
|
|
/// </summary>
|
|
/// <param name="ipaddress"></param>
|
|
/// <returns></returns>
|
|
public static bool IsIANAReserved(IPAddress ipaddress)
|
|
{
|
|
|
|
if (ipaddress == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(ipaddress));
|
|
}
|
|
|
|
return IPNetwork.IANA_ABLK_RESERVED1.Contains(ipaddress)
|
|
|| IPNetwork.IANA_BBLK_RESERVED1.Contains(ipaddress)
|
|
|| IPNetwork.IANA_CBLK_RESERVED1.Contains(ipaddress);
|
|
}
|
|
|
|
/// <summary>
|
|
/// return true if ipnetwork is contained in
|
|
/// IANA_ABLK_RESERVED1, IANA_BBLK_RESERVED1, IANA_CBLK_RESERVED1
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public bool IsIANAReserved()
|
|
{
|
|
return IPNetwork.IANA_ABLK_RESERVED1.Contains(this)
|
|
|| IPNetwork.IANA_BBLK_RESERVED1.Contains(this)
|
|
|| IPNetwork.IANA_CBLK_RESERVED1.Contains(this);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Subnet
|
|
|
|
/// <summary>
|
|
/// Subnet a network into multiple nets of cidr mask
|
|
/// Subnet 192.168.0.0/24 into cidr 25 gives 192.168.0.0/25, 192.168.0.128/25
|
|
/// Subnet 10.0.0.0/8 into cidr 9 gives 10.0.0.0/9, 10.128.0.0/9
|
|
/// </summary>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public IPNetworkCollection Subnet(byte cidr)
|
|
{
|
|
IPNetworkCollection ipnetworkCollection = null;
|
|
IPNetwork.InternalSubnet(false, this, cidr, out ipnetworkCollection);
|
|
return ipnetworkCollection;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Subnet a network into multiple nets of cidr mask
|
|
/// Subnet 192.168.0.0/24 into cidr 25 gives 192.168.0.0/25, 192.168.0.128/25
|
|
/// Subnet 10.0.0.0/8 into cidr 9 gives 10.0.0.0/9, 10.128.0.0/9
|
|
/// </summary>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public bool TrySubnet(byte cidr, out IPNetworkCollection ipnetworkCollection)
|
|
{
|
|
IPNetworkCollection inc = null;
|
|
IPNetwork.InternalSubnet(true, this, cidr, out inc);
|
|
if (inc == null)
|
|
{
|
|
ipnetworkCollection = null;
|
|
return false;
|
|
}
|
|
|
|
ipnetworkCollection = inc;
|
|
return true;
|
|
}
|
|
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static void InternalSubnet(bool trySubnet, IPNetwork network, byte cidr, out IPNetworkCollection ipnetworkCollection)
|
|
{
|
|
|
|
if (network == null)
|
|
{
|
|
if (trySubnet == false)
|
|
{
|
|
throw new ArgumentNullException(nameof(network));
|
|
}
|
|
ipnetworkCollection = null;
|
|
return;
|
|
}
|
|
|
|
int maxCidr = network._family == System.Net.Sockets.AddressFamily.InterNetwork ? 32 : 128;
|
|
if (cidr > maxCidr)
|
|
{
|
|
if (trySubnet == false)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(cidr));
|
|
}
|
|
ipnetworkCollection = null;
|
|
return;
|
|
}
|
|
|
|
if (cidr < network.Cidr)
|
|
{
|
|
if (trySubnet == false)
|
|
{
|
|
throw new ArgumentException("cidr");
|
|
}
|
|
ipnetworkCollection = null;
|
|
return;
|
|
}
|
|
|
|
ipnetworkCollection = new IPNetworkCollection(network, cidr);
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
#endregion
|
|
|
|
#region Supernet
|
|
|
|
/// <summary>
|
|
/// Supernet two consecutive cidr equal subnet into a single one
|
|
/// 192.168.0.0/24 + 192.168.1.0/24 = 192.168.0.0/23
|
|
/// 10.1.0.0/16 + 10.0.0.0/16 = 10.0.0.0/15
|
|
/// 192.168.0.0/24 + 192.168.0.0/25 = 192.168.0.0/24
|
|
/// </summary>
|
|
/// <param name="network2"></param>
|
|
/// <returns></returns>
|
|
public IPNetwork Supernet(IPNetwork network2)
|
|
{
|
|
IPNetwork supernet = null;
|
|
IPNetwork.InternalSupernet(false, this, network2, out supernet);
|
|
return supernet;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Try to supernet two consecutive cidr equal subnet into a single one
|
|
/// 192.168.0.0/24 + 192.168.1.0/24 = 192.168.0.0/23
|
|
/// 10.1.0.0/16 + 10.0.0.0/16 = 10.0.0.0/15
|
|
/// 192.168.0.0/24 + 192.168.0.0/25 = 192.168.0.0/24
|
|
/// </summary>
|
|
/// <param name="network2"></param>
|
|
/// <returns></returns>
|
|
public bool TrySupernet(IPNetwork network2, out IPNetwork supernet)
|
|
{
|
|
|
|
IPNetwork outSupernet = null;
|
|
IPNetwork.InternalSupernet(true, this, network2, out outSupernet);
|
|
bool parsed = (outSupernet != null);
|
|
supernet = outSupernet;
|
|
return parsed;
|
|
}
|
|
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static void InternalSupernet(bool trySupernet, IPNetwork network1, IPNetwork network2, out IPNetwork supernet)
|
|
{
|
|
|
|
if (network1 == null)
|
|
{
|
|
if (trySupernet == false)
|
|
{
|
|
throw new ArgumentNullException(nameof(network1));
|
|
}
|
|
supernet = null;
|
|
return;
|
|
}
|
|
|
|
if (network2 == null)
|
|
{
|
|
if (trySupernet == false)
|
|
{
|
|
throw new ArgumentNullException(nameof(network2));
|
|
}
|
|
supernet = null;
|
|
return;
|
|
}
|
|
|
|
|
|
if (network1.Contains(network2))
|
|
{
|
|
supernet = new IPNetwork(network1._network, network1._family, network1.Cidr);
|
|
return;
|
|
}
|
|
|
|
if (network2.Contains(network1))
|
|
{
|
|
supernet = new IPNetwork(network2._network, network2._family, network2.Cidr);
|
|
return;
|
|
}
|
|
|
|
if (network1._cidr != network2._cidr)
|
|
{
|
|
if (trySupernet == false)
|
|
{
|
|
throw new ArgumentException("cidr");
|
|
}
|
|
supernet = null;
|
|
return;
|
|
}
|
|
|
|
var first = (network1._network < network2._network) ? network1 : network2;
|
|
var last = (network1._network > network2._network) ? network1 : network2;
|
|
|
|
/// Starting from here :
|
|
/// network1 and network2 have the same cidr,
|
|
/// network1 does not contain network2,
|
|
/// network2 does not contain network1,
|
|
/// first is the lower subnet
|
|
/// last is the higher subnet
|
|
|
|
|
|
if ((first._broadcast + 1) != last._network)
|
|
{
|
|
if (trySupernet == false)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(trySupernet), "TrySupernet was false while the first and last networks are not adjacent.");
|
|
}
|
|
supernet = null;
|
|
return;
|
|
}
|
|
|
|
var uintSupernet = first._network;
|
|
byte cidrSupernet = (byte)(first._cidr - 1);
|
|
|
|
var networkSupernet = new IPNetwork(uintSupernet, first._family, cidrSupernet);
|
|
if (networkSupernet._network != first._network)
|
|
{
|
|
if (trySupernet == false)
|
|
{
|
|
throw new ArgumentException("network");
|
|
}
|
|
supernet = null;
|
|
return;
|
|
}
|
|
supernet = networkSupernet;
|
|
return;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region GetHashCode
|
|
|
|
public override int GetHashCode()
|
|
{
|
|
return string.Format("{0}|{1}|{2}",
|
|
this._ipaddress.GetHashCode(),
|
|
this._network.GetHashCode(),
|
|
this._cidr.GetHashCode()).GetHashCode();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region SupernetArray
|
|
|
|
/// <summary>
|
|
/// Supernet a list of subnet
|
|
/// 192.168.0.0/24 + 192.168.1.0/24 = 192.168.0.0/23
|
|
/// 192.168.0.0/24 + 192.168.1.0/24 + 192.168.2.0/24 + 192.168.3.0/24 = 192.168.0.0/22
|
|
/// </summary>
|
|
/// <param name="ipnetworks">The IP networks</param>
|
|
/// <returns></returns>
|
|
public static IPNetwork[] Supernet(IPNetwork[] ipnetworks)
|
|
{
|
|
InternalSupernet(false, ipnetworks, out var supernet);
|
|
return supernet;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Supernet a list of subnet
|
|
/// 192.168.0.0/24 + 192.168.1.0/24 = 192.168.0.0/23
|
|
/// 192.168.0.0/24 + 192.168.1.0/24 + 192.168.2.0/24 + 192.168.3.0/24 = 192.168.0.0/22
|
|
/// </summary>
|
|
/// <param name="ipnetworks"></param>
|
|
/// <param name="supernet"></param>
|
|
/// <returns></returns>
|
|
public static bool TrySupernet(IPNetwork[] ipnetworks, out IPNetwork[] supernet)
|
|
{
|
|
bool supernetted = InternalSupernet(true, ipnetworks, out supernet);
|
|
return supernetted;
|
|
|
|
}
|
|
|
|
#if TRAVISCI
|
|
public
|
|
#else
|
|
internal
|
|
#endif
|
|
static bool InternalSupernet(bool trySupernet, IPNetwork[] ipnetworks, out IPNetwork[] supernet)
|
|
{
|
|
|
|
if (ipnetworks == null)
|
|
{
|
|
if (trySupernet == false)
|
|
{
|
|
throw new ArgumentNullException(nameof(ipnetworks));
|
|
}
|
|
supernet = null;
|
|
return false;
|
|
}
|
|
|
|
if (ipnetworks.Length <= 0)
|
|
{
|
|
supernet = new IPNetwork[0];
|
|
return true;
|
|
}
|
|
|
|
var supernetted = new List<IPNetwork>();
|
|
var ipns = IPNetwork.Array2List(ipnetworks);
|
|
var current = IPNetwork.List2Stack(ipns);
|
|
int previousCount = 0;
|
|
int currentCount = current.Count;
|
|
|
|
while (previousCount != currentCount)
|
|
{
|
|
|
|
supernetted.Clear();
|
|
while (current.Count > 1)
|
|
{
|
|
var ipn1 = current.Pop();
|
|
var ipn2 = current.Peek();
|
|
|
|
IPNetwork outNetwork = null;
|
|
bool success = ipn1.TrySupernet(ipn2, out outNetwork);
|
|
if (success)
|
|
{
|
|
current.Pop();
|
|
current.Push(outNetwork);
|
|
}
|
|
else
|
|
{
|
|
supernetted.Add(ipn1);
|
|
}
|
|
}
|
|
if (current.Count == 1)
|
|
{
|
|
supernetted.Add(current.Pop());
|
|
}
|
|
|
|
previousCount = currentCount;
|
|
currentCount = supernetted.Count;
|
|
current = IPNetwork.List2Stack(supernetted);
|
|
|
|
}
|
|
supernet = supernetted.ToArray();
|
|
return true;
|
|
}
|
|
|
|
private static Stack<IPNetwork> List2Stack(List<IPNetwork> list)
|
|
{
|
|
var stack = new Stack<IPNetwork>();
|
|
list.ForEach(new Action<IPNetwork>(
|
|
delegate (IPNetwork ipn)
|
|
{
|
|
stack.Push(ipn);
|
|
}
|
|
));
|
|
return stack;
|
|
}
|
|
|
|
private static List<IPNetwork> Array2List(IPNetwork[] array)
|
|
{
|
|
var ipns = new List<IPNetwork>();
|
|
ipns.AddRange(array);
|
|
IPNetwork.RemoveNull(ipns);
|
|
ipns.Sort(new Comparison<IPNetwork>(
|
|
delegate (IPNetwork ipn1, IPNetwork ipn2)
|
|
{
|
|
int networkCompare = ipn1._network.CompareTo(ipn2._network);
|
|
if (networkCompare == 0)
|
|
{
|
|
int cidrCompare = ipn1._cidr.CompareTo(ipn2._cidr);
|
|
return cidrCompare;
|
|
}
|
|
return networkCompare;
|
|
}
|
|
));
|
|
ipns.Reverse();
|
|
|
|
return ipns;
|
|
}
|
|
|
|
private static void RemoveNull(List<IPNetwork> ipns)
|
|
{
|
|
ipns.RemoveAll(new Predicate<IPNetwork>(
|
|
delegate (IPNetwork ipn)
|
|
{
|
|
if (ipn == null)
|
|
{
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
));
|
|
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region WideSubnet
|
|
|
|
public static IPNetwork WideSubnet(string start, string end)
|
|
{
|
|
|
|
if (string.IsNullOrEmpty(start))
|
|
{
|
|
throw new ArgumentNullException(nameof(start));
|
|
}
|
|
|
|
if (string.IsNullOrEmpty(end))
|
|
{
|
|
throw new ArgumentNullException(nameof(end));
|
|
}
|
|
|
|
if (!IPAddress.TryParse(start, out var startIP))
|
|
{
|
|
throw new ArgumentException("start");
|
|
}
|
|
|
|
if (!IPAddress.TryParse(end, out var endIP))
|
|
{
|
|
throw new ArgumentException("end");
|
|
}
|
|
|
|
if (startIP.AddressFamily != endIP.AddressFamily)
|
|
{
|
|
throw new NotSupportedException("MixedAddressFamily");
|
|
}
|
|
|
|
var ipnetwork = new IPNetwork(0, startIP.AddressFamily, 0);
|
|
for (byte cidr = 32; cidr >= 0; cidr--)
|
|
{
|
|
var wideSubnet = IPNetwork.Parse(start, cidr);
|
|
if (wideSubnet.Contains(endIP))
|
|
{
|
|
ipnetwork = wideSubnet;
|
|
break;
|
|
}
|
|
}
|
|
return ipnetwork;
|
|
|
|
}
|
|
|
|
public static bool TryWideSubnet(IPNetwork[] ipnetworks, out IPNetwork ipnetwork)
|
|
{
|
|
IPNetwork ipn = null;
|
|
IPNetwork.InternalWideSubnet(true, ipnetworks, out ipn);
|
|
if (ipn == null)
|
|
{
|
|
ipnetwork = null;
|
|
return false;
|
|
}
|
|
ipnetwork = ipn;
|
|
return true;
|
|
}
|
|
|
|
public static IPNetwork WideSubnet(IPNetwork[] ipnetworks)
|
|
{
|
|
IPNetwork ipn = null;
|
|
IPNetwork.InternalWideSubnet(false, ipnetworks, out ipn);
|
|
return ipn;
|
|
}
|
|
|
|
internal static void InternalWideSubnet(bool tryWide, IPNetwork[] ipnetworks, out IPNetwork ipnetwork)
|
|
{
|
|
|
|
if (ipnetworks == null)
|
|
{
|
|
if (tryWide == false)
|
|
{
|
|
throw new ArgumentNullException(nameof(ipnetworks));
|
|
}
|
|
ipnetwork = null;
|
|
return;
|
|
}
|
|
|
|
|
|
IPNetwork[] nnin = Array.FindAll(ipnetworks, new Predicate<IPNetwork>(
|
|
delegate (IPNetwork ipnet)
|
|
{
|
|
return ipnet != null;
|
|
}
|
|
));
|
|
|
|
if (nnin.Length <= 0)
|
|
{
|
|
if (tryWide == false)
|
|
{
|
|
throw new ArgumentException("ipnetworks");
|
|
}
|
|
ipnetwork = null;
|
|
return;
|
|
}
|
|
|
|
if (nnin.Length == 1)
|
|
{
|
|
var ipn0 = nnin[0];
|
|
ipnetwork = ipn0;
|
|
return;
|
|
}
|
|
|
|
Array.Sort(nnin);
|
|
var nnin0 = nnin[0];
|
|
var uintNnin0 = nnin0._ipaddress;
|
|
|
|
var nninX = nnin[nnin.Length - 1];
|
|
var ipaddressX = nninX.Broadcast;
|
|
|
|
var family = ipnetworks[0]._family;
|
|
foreach (var ipnx in ipnetworks)
|
|
{
|
|
if (ipnx._family != family)
|
|
{
|
|
throw new ArgumentException("MixedAddressFamily");
|
|
}
|
|
}
|
|
|
|
var ipn = new IPNetwork(0, family, 0);
|
|
for (byte cidr = nnin0._cidr; cidr >= 0; cidr--)
|
|
{
|
|
var wideSubnet = new IPNetwork(uintNnin0, family, cidr);
|
|
if (wideSubnet.Contains(ipaddressX))
|
|
{
|
|
ipn = wideSubnet;
|
|
break;
|
|
}
|
|
}
|
|
|
|
ipnetwork = ipn;
|
|
return;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Print
|
|
|
|
/// <summary>
|
|
/// Print an ipnetwork in a clear representation string
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public string Print()
|
|
{
|
|
|
|
var sw = new StringWriter();
|
|
|
|
sw.WriteLine("IPNetwork : {0}", ToString());
|
|
sw.WriteLine("Network : {0}", Network);
|
|
sw.WriteLine("Netmask : {0}", Netmask);
|
|
sw.WriteLine("Cidr : {0}", Cidr);
|
|
sw.WriteLine("Broadcast : {0}", Broadcast);
|
|
sw.WriteLine("FirstUsable : {0}", FirstUsable);
|
|
sw.WriteLine("LastUsable : {0}", LastUsable);
|
|
sw.WriteLine("Usable : {0}", Usable);
|
|
|
|
return sw.ToString();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region TryGuessCidr
|
|
|
|
/// <summary>
|
|
///
|
|
/// Class Leading bits Default netmask
|
|
/// A (CIDR /8) 00 255.0.0.0
|
|
/// A (CIDR /8) 01 255.0.0.0
|
|
/// B (CIDR /16) 10 255.255.0.0
|
|
/// C (CIDR /24) 11 255.255.255.0
|
|
///
|
|
/// </summary>
|
|
/// <param name="ip"></param>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public static bool TryGuessCidr(string ip, out byte cidr)
|
|
{
|
|
|
|
IPAddress ipaddress = null;
|
|
bool parsed = IPAddress.TryParse(string.Format("{0}", ip), out ipaddress);
|
|
if (parsed == false)
|
|
{
|
|
cidr = 0;
|
|
return false;
|
|
}
|
|
|
|
if (ipaddress.AddressFamily == AddressFamily.InterNetworkV6)
|
|
{
|
|
cidr = 64;
|
|
return true;
|
|
}
|
|
var uintIPAddress = IPNetwork.ToBigInteger(ipaddress);
|
|
uintIPAddress = uintIPAddress >> 29;
|
|
if (uintIPAddress <= 3)
|
|
{
|
|
cidr = 8;
|
|
return true;
|
|
}
|
|
else if (uintIPAddress <= 5)
|
|
{
|
|
cidr = 16;
|
|
return true;
|
|
}
|
|
else if (uintIPAddress <= 6)
|
|
{
|
|
cidr = 24;
|
|
return true;
|
|
}
|
|
|
|
cidr = 0;
|
|
return false;
|
|
|
|
}
|
|
|
|
/// <summary>
|
|
/// Try to parse cidr. Have to be >= 0 and <= 32 or 128
|
|
/// </summary>
|
|
/// <param name="sidr"></param>
|
|
/// <param name="cidr"></param>
|
|
/// <returns></returns>
|
|
public static bool TryParseCidr(string sidr, AddressFamily family, out byte? cidr)
|
|
{
|
|
|
|
byte b = 0;
|
|
if (!byte.TryParse(sidr, out b))
|
|
{
|
|
cidr = null;
|
|
return false;
|
|
}
|
|
|
|
IPAddress netmask = null;
|
|
if (!IPNetwork.TryToNetmask(b, family, out netmask))
|
|
{
|
|
cidr = null;
|
|
return false;
|
|
}
|
|
|
|
cidr = b;
|
|
return true;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region ListIPAddress
|
|
|
|
public IPAddressCollection ListIPAddress()
|
|
{
|
|
return new IPAddressCollection(this);
|
|
}
|
|
|
|
#endregion
|
|
|
|
/**
|
|
* Need a better way to do it
|
|
*
|
|
#region TrySubstractNetwork
|
|
|
|
public static bool TrySubstractNetwork(IPNetwork[] ipnetworks, IPNetwork substract, out IEnumerable<IPNetwork> result) {
|
|
|
|
if (ipnetworks == null) {
|
|
result = null;
|
|
return false;
|
|
}
|
|
if (ipnetworks.Length <= 0) {
|
|
result = null;
|
|
return false;
|
|
}
|
|
if (substract == null) {
|
|
result = null;
|
|
return false;
|
|
}
|
|
var results = new List<IPNetwork>();
|
|
foreach (var ipn in ipnetworks) {
|
|
if (!Overlap(ipn, substract)) {
|
|
results.Add(ipn);
|
|
continue;
|
|
}
|
|
|
|
var collection = ipn.Subnet(substract.Cidr);
|
|
var rtemp = new List<IPNetwork>();
|
|
foreach(var subnet in collection) {
|
|
if (subnet != substract) {
|
|
rtemp.Add(subnet);
|
|
}
|
|
}
|
|
var supernets = Supernet(rtemp.ToArray());
|
|
results.AddRange(supernets);
|
|
}
|
|
result = results;
|
|
return true;
|
|
}
|
|
#endregion
|
|
* **/
|
|
|
|
#region IComparable<IPNetwork> Members
|
|
|
|
public static int Compare(IPNetwork left, IPNetwork right)
|
|
{
|
|
// two null IPNetworks are equal
|
|
if (ReferenceEquals(left, null) && ReferenceEquals(right, null)) return 0;
|
|
|
|
// two same IPNetworks are equal
|
|
if (ReferenceEquals(left, right)) return 0;
|
|
|
|
// null is always sorted first
|
|
if (ReferenceEquals(left, null)) return -1;
|
|
if (ReferenceEquals(right, null)) return 1;
|
|
|
|
// first test the network
|
|
var result = left._network.CompareTo(right._network);
|
|
if (result != 0) return result;
|
|
|
|
// then test the cidr
|
|
result = left._cidr.CompareTo(right._cidr);
|
|
return result;
|
|
}
|
|
|
|
public int CompareTo(IPNetwork other)
|
|
{
|
|
return Compare(this, other);
|
|
}
|
|
|
|
public int CompareTo(object obj)
|
|
{
|
|
// null is at less
|
|
if (obj == null) return 1;
|
|
|
|
// convert to a proper Cidr object
|
|
var other = obj as IPNetwork;
|
|
|
|
// type problem if null
|
|
if (other == null)
|
|
{
|
|
throw new ArgumentException(
|
|
"The supplied parameter is an invalid type. Please supply an IPNetwork type.",
|
|
nameof(obj));
|
|
}
|
|
|
|
// perform the comparision
|
|
return CompareTo(other);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region IEquatable<IPNetwork> Members
|
|
|
|
public static bool Equals(IPNetwork left, IPNetwork right)
|
|
{
|
|
return Compare(left, right) == 0;
|
|
}
|
|
|
|
public bool Equals(IPNetwork other)
|
|
{
|
|
return Equals(this, other);
|
|
}
|
|
|
|
public override bool Equals(object obj)
|
|
{
|
|
return Equals(this, obj as IPNetwork);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Operators
|
|
|
|
public static bool operator ==(IPNetwork left, IPNetwork right)
|
|
{
|
|
return Equals(left, right);
|
|
}
|
|
|
|
public static bool operator !=(IPNetwork left, IPNetwork right)
|
|
{
|
|
return !Equals(left, right);
|
|
}
|
|
|
|
public static bool operator <(IPNetwork left, IPNetwork right)
|
|
{
|
|
return Compare(left, right) < 0;
|
|
}
|
|
|
|
public static bool operator >(IPNetwork left, IPNetwork right)
|
|
{
|
|
return Compare(left, right) > 0;
|
|
}
|
|
|
|
#endregion
|
|
|
|
}
|
|
}
|