724 lines
24 KiB
C#
724 lines
24 KiB
C#
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.Tasks;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Model.Extensions;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Net;
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using MediaBrowser.Model.System;
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using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations.Networking
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{
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public class NetworkManager : INetworkManager
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{
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protected ILogger Logger { get; private set; }
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public event EventHandler NetworkChanged;
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public Func<string[]> LocalSubnetsFn { get; set; }
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public NetworkManager(ILogger logger, IEnvironmentInfo environment)
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{
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Logger = logger;
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// In FreeBSD these events cause a crash
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if (environment.OperatingSystem != MediaBrowser.Model.System.OperatingSystem.BSD)
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{
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try
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{
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NetworkChange.NetworkAddressChanged += NetworkChange_NetworkAddressChanged;
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error binding to NetworkAddressChanged event");
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}
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try
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{
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NetworkChange.NetworkAvailabilityChanged += NetworkChange_NetworkAvailabilityChanged;
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error binding to NetworkChange_NetworkAvailabilityChanged event");
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}
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}
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}
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private void NetworkChange_NetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
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{
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Logger.LogDebug("NetworkAvailabilityChanged");
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OnNetworkChanged();
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}
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private void NetworkChange_NetworkAddressChanged(object sender, EventArgs e)
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{
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Logger.LogDebug("NetworkAddressChanged");
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OnNetworkChanged();
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}
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private void OnNetworkChanged()
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{
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lock (_localIpAddressSyncLock)
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{
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_localIpAddresses = null;
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_macAddresses = null;
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}
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if (NetworkChanged != null)
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{
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NetworkChanged(this, EventArgs.Empty);
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}
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}
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private IpAddressInfo[] _localIpAddresses;
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private readonly object _localIpAddressSyncLock = new object();
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public IpAddressInfo[] GetLocalIpAddresses()
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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().Result.Select(ToIpAddressInfo).ToArray();
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_localIpAddresses = addresses;
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return addresses;
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}
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return _localIpAddresses;
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}
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}
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private async Task<List<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(await GetLocalIpAddressesFallback().ConfigureAwait(false));
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}
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var listClone = list.ToList();
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return list
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.OrderBy(i => i.AddressFamily == AddressFamily.InterNetwork ? 0 : 1)
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.ThenBy(i => listClone.IndexOf(i))
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.Where(FilterIpAddress)
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.DistinctBy(i => i.ToString())
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.ToList();
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}
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private static 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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return IsInPrivateAddressSpace(endpoint, true);
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}
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private bool IsInPrivateAddressSpace(string endpoint, bool checkSubnets)
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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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// ipv6
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if (endpoint.Split('.').Length > 4)
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{
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// Handle ipv4 mapped to ipv6
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var originalEndpoint = endpoint;
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endpoint = endpoint.Replace("::ffff:", string.Empty);
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if (string.Equals(endpoint, originalEndpoint, StringComparison.OrdinalIgnoreCase))
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{
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return false;
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}
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}
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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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if (endpoint.StartsWith("localhost", StringComparison.OrdinalIgnoreCase) ||
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endpoint.StartsWith("127.", StringComparison.OrdinalIgnoreCase) ||
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endpoint.StartsWith("169.", StringComparison.OrdinalIgnoreCase))
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{
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return true;
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}
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if (checkSubnets && endpoint.StartsWith("192.168", StringComparison.OrdinalIgnoreCase))
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{
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return true;
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}
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if (checkSubnets && IsInPrivateAddressSpaceAndLocalSubnet(endpoint))
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{
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return true;
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}
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return false;
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}
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public bool IsInPrivateAddressSpaceAndLocalSubnet(string endpoint)
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{
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if (endpoint.StartsWith("10.", StringComparison.OrdinalIgnoreCase))
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{
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var endpointFirstPart = endpoint.Split('.')[0];
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var subnets = GetSubnets(endpointFirstPart);
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foreach (var subnet_Match in subnets)
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{
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//logger.LogDebug("subnet_Match:" + subnet_Match);
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if (endpoint.StartsWith(subnet_Match + ".", 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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return false;
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}
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private Dictionary<string, List<string>> _subnetLookup = new Dictionary<string, List<string>>(StringComparer.Ordinal);
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private List<string> GetSubnets(string endpointFirstPart)
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{
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lock (_subnetLookup)
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{
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if (_subnetLookup.TryGetValue(endpointFirstPart, out var subnets))
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{
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return subnets;
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}
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subnets = new List<string>();
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foreach (var adapter in NetworkInterface.GetAllNetworkInterfaces())
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{
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foreach (var unicastIPAddressInformation in adapter.GetIPProperties().UnicastAddresses)
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{
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if (unicastIPAddressInformation.Address.AddressFamily == AddressFamily.InterNetwork && endpointFirstPart == unicastIPAddressInformation.Address.ToString().Split('.')[0])
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{
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int subnet_Test = 0;
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foreach (string part in unicastIPAddressInformation.IPv4Mask.ToString().Split('.'))
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{
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if (part.Equals("0")) break;
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subnet_Test++;
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}
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var subnet_Match = string.Join(".", unicastIPAddressInformation.Address.ToString().Split('.').Take(subnet_Test).ToArray());
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// TODO: Is this check necessary?
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if (adapter.OperationalStatus == OperationalStatus.Up)
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{
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subnets.Add(subnet_Match);
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}
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}
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}
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}
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_subnetLookup[endpointFirstPart] = subnets;
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return subnets;
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}
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}
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private static 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 IsAddressInSubnets(string addressString, string[] subnets)
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{
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return IsAddressInSubnets(IPAddress.Parse(addressString), addressString, subnets);
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}
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private static bool IsAddressInSubnets(IPAddress address, string addressString, string[] subnets)
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{
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foreach (var subnet in subnets)
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{
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var normalizedSubnet = subnet.Trim();
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if (string.Equals(normalizedSubnet, addressString, StringComparison.OrdinalIgnoreCase))
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{
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return true;
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}
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if (normalizedSubnet.IndexOf('/') != -1)
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{
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var ipnetwork = IPNetwork.Parse(normalizedSubnet);
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if (ipnetwork.Contains(address))
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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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return false;
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}
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private bool IsInLocalNetworkInternal(string endpoint, bool resolveHost)
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{
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if (string.IsNullOrEmpty(endpoint))
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{
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throw new ArgumentNullException(nameof(endpoint));
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}
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if (IPAddress.TryParse(endpoint, out var address))
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{
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var addressString = address.ToString();
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var localSubnetsFn = LocalSubnetsFn;
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if (localSubnetsFn != null)
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{
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var localSubnets = localSubnetsFn();
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foreach (var subnet in localSubnets)
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{
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// only validate if there's at least one valid entry
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if (!string.IsNullOrWhiteSpace(subnet))
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{
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return IsAddressInSubnets(address, addressString, localSubnets) || IsInPrivateAddressSpace(addressString, false);
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}
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}
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}
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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, true))
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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 = 9;
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if (IsInPrivateAddressSpace(endpoint, true))
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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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if (Uri.TryCreate(endpoint, UriKind.RelativeOrAbsolute, out var 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.LogDebug("Resolving host {0}", host);
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address = GetIpAddresses(host).Result.FirstOrDefault();
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if (address != null)
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{
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Logger.LogDebug("{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.LogError(ex, "Error resolving hostname");
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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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private static Task<IPAddress[]> GetIpAddresses(string hostName)
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{
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return Dns.GetHostAddressesAsync(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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var validStatuses = new[] { OperationalStatus.Up, OperationalStatus.Unknown };
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interfaces = NetworkInterface.GetAllNetworkInterfaces()
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.Where(i => validStatuses.Contains(i.OperationalStatus))
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.ToArray();
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error in GetAllNetworkInterfaces");
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return new List<IPAddress>();
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}
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return interfaces.SelectMany(network =>
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{
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try
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{
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// suppress logging because it might be causing nas device wake up
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//logger.LogDebug("Querying interface: {0}. Type: {1}. Status: {2}", network.Name, network.NetworkInterfaceType, network.OperationalStatus);
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var ipProperties = network.GetIPProperties();
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// Try to exclude virtual adapters
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// http://stackoverflow.com/questions/8089685/c-sharp-finding-my-machines-local-ip-address-and-not-the-vms
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var addr = ipProperties.GatewayAddresses.FirstOrDefault();
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if (addr == null || string.Equals(addr.Address.ToString(), "0.0.0.0", StringComparison.OrdinalIgnoreCase))
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{
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return new List<IPAddress>();
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}
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return ipProperties.UnicastAddresses
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.Select(i => i.Address)
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.Where(i => i.AddressFamily == AddressFamily.InterNetwork || i.AddressFamily == AddressFamily.InterNetworkV6)
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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.LogError(ex, "Error querying network interface");
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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 static async Task<IEnumerable<IPAddress>> GetLocalIpAddressesFallback()
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{
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var host = await Dns.GetHostEntryAsync(Dns.GetHostName()).ConfigureAwait(false);
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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 || i.AddressFamily == AddressFamily.InterNetworkV6)
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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 GetRandomUnusedTcpPort()
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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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public int GetRandomUnusedUdpPort()
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{
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var localEndPoint = new IPEndPoint(IPAddress.Any, 0);
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using (var udpClient = new UdpClient(localEndPoint))
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{
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var port = ((IPEndPoint)(udpClient.Client.LocalEndPoint)).Port;
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return port;
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}
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}
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private List<string> _macAddresses;
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public List<string> GetMacAddresses()
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{
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if (_macAddresses == null)
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{
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_macAddresses = GetMacAddressesInternal();
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}
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return _macAddresses;
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}
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private static List<string> GetMacAddressesInternal()
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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 =>
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{
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try
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{
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var physicalAddress = i.GetPhysicalAddress();
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if (physicalAddress == null)
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{
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return null;
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}
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return physicalAddress.ToString();
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}
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catch (Exception)
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{
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//TODO Log exception.
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return null;
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}
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})
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.Where(i => i != null)
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.ToList();
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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).Result;
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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="ArgumentException">Endpoint descriptor may not be empty.</exception>
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/// <exception cref="FormatException"></exception>
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private static async Task<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 = await GetIPfromHost(values[0]).ConfigureAwait(false);
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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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|
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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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|
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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.
|
|
/// </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="FormatException"></exception>
|
|
private static int GetPort(string p)
|
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{
|
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if (!int.TryParse(p, out var port)
|
|
|| port < IPEndPoint.MinPort
|
|
|| port > IPEndPoint.MaxPort)
|
|
{
|
|
throw new FormatException(string.Format("Invalid end point port '{0}'", p));
|
|
}
|
|
|
|
return port;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the I pfrom host.
|
|
/// </summary>
|
|
/// <param name="p">The p.</param>
|
|
/// <returns>IPAddress.</returns>
|
|
/// <exception cref="ArgumentException"></exception>
|
|
private static async Task<IPAddress> GetIPfromHost(string p)
|
|
{
|
|
var hosts = await Dns.GetHostAddressesAsync(p).ConfigureAwait(false);
|
|
|
|
if (hosts == null || hosts.Length == 0)
|
|
throw new ArgumentException(string.Format("Host not found: {0}", p));
|
|
|
|
return hosts[0];
|
|
}
|
|
|
|
public IpAddressInfo ParseIpAddress(string ipAddress)
|
|
{
|
|
if (TryParseIpAddress(ipAddress, out var info))
|
|
{
|
|
return info;
|
|
}
|
|
|
|
throw new ArgumentException("Invalid ip address: " + ipAddress);
|
|
}
|
|
|
|
public bool TryParseIpAddress(string ipAddress, out IpAddressInfo ipAddressInfo)
|
|
{
|
|
if (IPAddress.TryParse(ipAddress, out var address))
|
|
{
|
|
ipAddressInfo = ToIpAddressInfo(address);
|
|
return true;
|
|
}
|
|
|
|
ipAddressInfo = null;
|
|
return false;
|
|
}
|
|
|
|
public static IpEndPointInfo ToIpEndPointInfo(IPEndPoint endpoint)
|
|
{
|
|
if (endpoint == null)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
return new IpEndPointInfo(ToIpAddressInfo(endpoint.Address), endpoint.Port);
|
|
}
|
|
|
|
public static IPEndPoint ToIPEndPoint(IpEndPointInfo endpoint)
|
|
{
|
|
if (endpoint == null)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
return new IPEndPoint(ToIPAddress(endpoint.IpAddress), endpoint.Port);
|
|
}
|
|
|
|
public static IPAddress ToIPAddress(IpAddressInfo address)
|
|
{
|
|
if (address.Equals(IpAddressInfo.Any))
|
|
{
|
|
return IPAddress.Any;
|
|
}
|
|
if (address.Equals(IpAddressInfo.IPv6Any))
|
|
{
|
|
return IPAddress.IPv6Any;
|
|
}
|
|
if (address.Equals(IpAddressInfo.Loopback))
|
|
{
|
|
return IPAddress.Loopback;
|
|
}
|
|
if (address.Equals(IpAddressInfo.IPv6Loopback))
|
|
{
|
|
return IPAddress.IPv6Loopback;
|
|
}
|
|
|
|
return IPAddress.Parse(address.Address);
|
|
}
|
|
|
|
public static IpAddressInfo ToIpAddressInfo(IPAddress address)
|
|
{
|
|
if (address.Equals(IPAddress.Any))
|
|
{
|
|
return IpAddressInfo.Any;
|
|
}
|
|
if (address.Equals(IPAddress.IPv6Any))
|
|
{
|
|
return IpAddressInfo.IPv6Any;
|
|
}
|
|
if (address.Equals(IPAddress.Loopback))
|
|
{
|
|
return IpAddressInfo.Loopback;
|
|
}
|
|
if (address.Equals(IPAddress.IPv6Loopback))
|
|
{
|
|
return IpAddressInfo.IPv6Loopback;
|
|
}
|
|
return new IpAddressInfo(address.ToString(), address.AddressFamily == AddressFamily.InterNetworkV6 ? IpAddressFamily.InterNetworkV6 : IpAddressFamily.InterNetwork);
|
|
}
|
|
|
|
public async Task<IpAddressInfo[]> GetHostAddressesAsync(string host)
|
|
{
|
|
var addresses = await Dns.GetHostAddressesAsync(host).ConfigureAwait(false);
|
|
return addresses.Select(ToIpAddressInfo).ToArray();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the network shares.
|
|
/// </summary>
|
|
/// <param name="path">The path.</param>
|
|
/// <returns>IEnumerable{NetworkShare}.</returns>
|
|
public virtual IEnumerable<NetworkShare> GetNetworkShares(string path)
|
|
{
|
|
return new List<NetworkShare>();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets available devices within the domain
|
|
/// </summary>
|
|
/// <returns>PC's in the Domain</returns>
|
|
public virtual IEnumerable<FileSystemEntryInfo> GetNetworkDevices()
|
|
{
|
|
return new List<FileSystemEntryInfo>();
|
|
}
|
|
}
|
|
}
|