395 lines
13 KiB
C#
395 lines
13 KiB
C#
using MediaBrowser.Model.Logging;
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Net;
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using System.Net.NetworkInformation;
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using System.Net.Sockets;
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using System.Threading;
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using MoreLinq;
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namespace MediaBrowser.Common.Implementations.Networking
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{
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public abstract class BaseNetworkManager
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{
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protected ILogger Logger { get; private set; }
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private Timer _clearCacheTimer;
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protected BaseNetworkManager(ILogger logger)
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{
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Logger = logger;
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// Can't use network change events due to a crash in Linux
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_clearCacheTimer = new Timer(ClearCacheTimerCallback, null, TimeSpan.FromMinutes(1), TimeSpan.FromMinutes(1));
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}
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private void ClearCacheTimerCallback(object state)
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{
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lock (_localIpAddressSyncLock)
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{
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_localIpAddresses = null;
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}
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}
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private volatile List<IPAddress> _localIpAddresses;
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private readonly object _localIpAddressSyncLock = new object();
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/// <summary>
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/// Gets the machine's local ip address
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/// </summary>
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/// <returns>IPAddress.</returns>
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public IEnumerable<IPAddress> GetLocalIpAddresses()
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{
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if (_localIpAddresses == null)
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{
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lock (_localIpAddressSyncLock)
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{
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if (_localIpAddresses == null)
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{
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var addresses = GetLocalIpAddressesInternal().ToList();
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_localIpAddresses = addresses;
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return addresses;
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}
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}
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}
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return _localIpAddresses;
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}
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private IEnumerable<IPAddress> GetLocalIpAddressesInternal()
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{
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var list = GetIPsDefault()
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.ToList();
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if (list.Count == 0)
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{
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list.AddRange(GetLocalIpAddressesFallback());
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}
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return list.Where(FilterIpAddress).DistinctBy(i => i.ToString());
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}
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private bool FilterIpAddress(IPAddress address)
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{
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var addressString = address.ToString ();
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if (addressString.StartsWith("169.", StringComparison.OrdinalIgnoreCase))
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{
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return false;
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}
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return true;
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}
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public bool IsInPrivateAddressSpace(string endpoint)
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{
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if (string.Equals(endpoint, "::1", StringComparison.OrdinalIgnoreCase))
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{
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return true;
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}
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// Handle ipv4 mapped to ipv6
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endpoint = endpoint.Replace("::ffff:", string.Empty);
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// Private address space:
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// http://en.wikipedia.org/wiki/Private_network
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if (endpoint.StartsWith("172.", StringComparison.OrdinalIgnoreCase))
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{
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return Is172AddressPrivate(endpoint);
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}
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return
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endpoint.StartsWith("localhost", StringComparison.OrdinalIgnoreCase) ||
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endpoint.StartsWith("127.", StringComparison.OrdinalIgnoreCase) ||
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endpoint.StartsWith("10.", StringComparison.OrdinalIgnoreCase) ||
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endpoint.StartsWith("192.168", StringComparison.OrdinalIgnoreCase) ||
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endpoint.StartsWith("169.", StringComparison.OrdinalIgnoreCase);
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}
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private bool Is172AddressPrivate(string endpoint)
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{
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for (var i = 16; i <= 31; i++)
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{
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if (endpoint.StartsWith("172." + i.ToString(CultureInfo.InvariantCulture) + ".", StringComparison.OrdinalIgnoreCase))
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{
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return true;
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}
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}
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return false;
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}
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public bool IsInLocalNetwork(string endpoint)
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{
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return IsInLocalNetworkInternal(endpoint, true);
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}
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public bool IsInLocalNetworkInternal(string endpoint, bool resolveHost)
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{
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if (string.IsNullOrWhiteSpace(endpoint))
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{
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throw new ArgumentNullException("endpoint");
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}
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IPAddress address;
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if (IPAddress.TryParse(endpoint, out address))
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{
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var addressString = address.ToString();
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int lengthMatch = 100;
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if (address.AddressFamily == AddressFamily.InterNetwork)
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{
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lengthMatch = 4;
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if (IsInPrivateAddressSpace(addressString))
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{
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return true;
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}
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}
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else if (address.AddressFamily == AddressFamily.InterNetworkV6)
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{
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lengthMatch = 10;
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if (IsInPrivateAddressSpace(endpoint))
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{
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return true;
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}
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}
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// Should be even be doing this with ipv6?
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if (addressString.Length >= lengthMatch)
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{
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var prefix = addressString.Substring(0, lengthMatch);
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if (GetLocalIpAddresses().Any(i => i.ToString().StartsWith(prefix, StringComparison.OrdinalIgnoreCase)))
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{
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return true;
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}
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}
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}
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else if (resolveHost)
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{
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Uri uri;
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if (Uri.TryCreate(endpoint, UriKind.RelativeOrAbsolute, out uri))
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{
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try
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{
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var host = uri.DnsSafeHost;
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Logger.Debug("Resolving host {0}", host);
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address = GetIpAddresses(host).FirstOrDefault();
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if (address != null)
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{
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Logger.Debug("{0} resolved to {1}", host, address);
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return IsInLocalNetworkInternal(address.ToString(), false);
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}
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}
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catch (InvalidOperationException)
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{
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// Can happen with reverse proxy or IIS url rewriting
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}
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catch (Exception ex)
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{
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Logger.ErrorException("Error resovling hostname", ex);
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}
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}
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}
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return false;
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}
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public IEnumerable<IPAddress> GetIpAddresses(string hostName)
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{
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return Dns.GetHostAddresses(hostName);
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}
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private List<IPAddress> GetIPsDefault()
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{
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NetworkInterface[] interfaces;
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try
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{
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interfaces = NetworkInterface.GetAllNetworkInterfaces();
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}
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catch (Exception ex)
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{
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Logger.ErrorException("Error in GetAllNetworkInterfaces", ex);
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return new List<IPAddress>();
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}
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return interfaces.SelectMany(network => {
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try
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{
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Logger.Debug("Querying interface: {0}. Type: {1}. Status: {2}", network.Name, network.NetworkInterfaceType, network.OperationalStatus);
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var properties = network.GetIPProperties();
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return properties.UnicastAddresses
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.Select(i => i.Address)
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.Where(i => i.AddressFamily == AddressFamily.InterNetwork)
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.ToList();
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}
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catch (Exception ex)
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{
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Logger.ErrorException("Error querying network interface", ex);
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return new List<IPAddress>();
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}
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}).DistinctBy(i => i.ToString())
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.ToList();
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}
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private IEnumerable<IPAddress> GetLocalIpAddressesFallback()
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{
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var host = Dns.GetHostEntry(Dns.GetHostName());
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// Reverse them because the last one is usually the correct one
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// It's not fool-proof so ultimately the consumer will have to examine them and decide
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return host.AddressList
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.Where(i => i.AddressFamily == AddressFamily.InterNetwork)
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.Reverse();
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}
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/// <summary>
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/// Gets a random port number that is currently available
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/// </summary>
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/// <returns>System.Int32.</returns>
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public int GetRandomUnusedPort()
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{
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var listener = new TcpListener(IPAddress.Any, 0);
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listener.Start();
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var port = ((IPEndPoint)listener.LocalEndpoint).Port;
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listener.Stop();
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return port;
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}
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/// <summary>
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/// Returns MAC Address from first Network Card in Computer
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/// </summary>
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/// <returns>[string] MAC Address</returns>
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public string GetMacAddress()
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{
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return NetworkInterface.GetAllNetworkInterfaces()
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.Where(i => i.NetworkInterfaceType != NetworkInterfaceType.Loopback)
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.Select(i => BitConverter.ToString(i.GetPhysicalAddress().GetAddressBytes()))
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.FirstOrDefault();
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}
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/// <summary>
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/// Parses the specified endpointstring.
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/// </summary>
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/// <param name="endpointstring">The endpointstring.</param>
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/// <returns>IPEndPoint.</returns>
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public IPEndPoint Parse(string endpointstring)
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{
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return Parse(endpointstring, -1);
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}
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/// <summary>
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/// Parses the specified endpointstring.
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/// </summary>
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/// <param name="endpointstring">The endpointstring.</param>
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/// <param name="defaultport">The defaultport.</param>
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/// <returns>IPEndPoint.</returns>
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/// <exception cref="System.ArgumentException">Endpoint descriptor may not be empty.</exception>
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/// <exception cref="System.FormatException"></exception>
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private static IPEndPoint Parse(string endpointstring, int defaultport)
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{
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if (String.IsNullOrEmpty(endpointstring)
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|| endpointstring.Trim().Length == 0)
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{
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throw new ArgumentException("Endpoint descriptor may not be empty.");
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}
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if (defaultport != -1 &&
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(defaultport < IPEndPoint.MinPort
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|| defaultport > IPEndPoint.MaxPort))
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{
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throw new ArgumentException(String.Format("Invalid default port '{0}'", defaultport));
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}
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string[] values = endpointstring.Split(new char[] { ':' });
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IPAddress ipaddy;
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int port = -1;
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//check if we have an IPv6 or ports
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if (values.Length <= 2) // ipv4 or hostname
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{
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port = values.Length == 1 ? defaultport : GetPort(values[1]);
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//try to use the address as IPv4, otherwise get hostname
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if (!IPAddress.TryParse(values[0], out ipaddy))
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ipaddy = GetIPfromHost(values[0]);
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}
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else if (values.Length > 2) //ipv6
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{
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//could [a:b:c]:d
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if (values[0].StartsWith("[") && values[values.Length - 2].EndsWith("]"))
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{
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string ipaddressstring = String.Join(":", values.Take(values.Length - 1).ToArray());
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ipaddy = IPAddress.Parse(ipaddressstring);
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port = GetPort(values[values.Length - 1]);
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}
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else //[a:b:c] or a:b:c
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{
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ipaddy = IPAddress.Parse(endpointstring);
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port = defaultport;
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}
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}
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else
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{
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throw new FormatException(String.Format("Invalid endpoint ipaddress '{0}'", endpointstring));
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}
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if (port == -1)
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throw new ArgumentException(String.Format("No port specified: '{0}'", endpointstring));
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return new IPEndPoint(ipaddy, port);
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}
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protected static readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
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/// Gets the port.
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/// </summary>
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/// <param name="p">The p.</param>
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/// <returns>System.Int32.</returns>
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/// <exception cref="System.FormatException"></exception>
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private static int GetPort(string p)
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{
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int port;
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if (!Int32.TryParse(p, out port)
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|| port < IPEndPoint.MinPort
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|| port > IPEndPoint.MaxPort)
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{
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throw new FormatException(String.Format("Invalid end point port '{0}'", p));
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}
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return port;
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}
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/// <summary>
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/// Gets the I pfrom host.
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/// </summary>
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/// <param name="p">The p.</param>
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/// <returns>IPAddress.</returns>
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/// <exception cref="System.ArgumentException"></exception>
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private static IPAddress GetIPfromHost(string p)
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{
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var hosts = Dns.GetHostAddresses(p);
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if (hosts == null || hosts.Length == 0)
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throw new ArgumentException(String.Format("Host not found: {0}", p));
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return hosts[0];
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}
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}
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}
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