jellyfin/Emby.Server.Implementations/Networking/NetworkManager.cs

660 lines
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C#
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using System;
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using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
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using System.Threading.Tasks;
using MediaBrowser.Common.Net;
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using MediaBrowser.Model.IO;
using MediaBrowser.Model.Net;
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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{
private readonly ILogger _logger;
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private IPAddress[] _localIpAddresses;
private readonly object _localIpAddressSyncLock = new object();
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public NetworkManager(ILogger<NetworkManager> logger)
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{
_logger = logger;
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NetworkChange.NetworkAddressChanged += OnNetworkAddressChanged;
NetworkChange.NetworkAvailabilityChanged += OnNetworkAvailabilityChanged;
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}
public Func<string[]> LocalSubnetsFn { get; set; }
public event EventHandler NetworkChanged;
private void OnNetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
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{
_logger.LogDebug("NetworkAvailabilityChanged");
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OnNetworkChanged();
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}
private void OnNetworkAddressChanged(object sender, EventArgs e)
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{
_logger.LogDebug("NetworkAddressChanged");
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OnNetworkChanged();
}
private void OnNetworkChanged()
{
lock (_localIpAddressSyncLock)
{
_localIpAddresses = null;
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_macAddresses = null;
}
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if (NetworkChanged != null)
{
NetworkChanged(this, EventArgs.Empty);
}
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}
public IPAddress[] GetLocalIpAddresses(bool ignoreVirtualInterface = true)
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{
lock (_localIpAddressSyncLock)
{
if (_localIpAddresses == null)
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{
var addresses = GetLocalIpAddressesInternal(ignoreVirtualInterface).ToArray();
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_localIpAddresses = addresses;
}
return _localIpAddresses;
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}
}
private List<IPAddress> GetLocalIpAddressesInternal(bool ignoreVirtualInterface)
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{
var list = GetIPsDefault(ignoreVirtualInterface).ToList();
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if (list.Count == 0)
{
list = GetLocalIpAddressesFallback().GetAwaiter().GetResult().ToList();
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}
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var listClone = list.ToList();
return list
.OrderBy(i => i.AddressFamily == AddressFamily.InterNetwork ? 0 : 1)
.ThenBy(i => listClone.IndexOf(i))
.Where(FilterIpAddress)
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.GroupBy(i => i.ToString())
.Select(x => x.First())
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.ToList();
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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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{
return false;
}
return true;
}
public bool IsInPrivateAddressSpace(string endpoint)
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{
return IsInPrivateAddressSpace(endpoint, true);
}
private bool IsInPrivateAddressSpace(string endpoint, bool checkSubnets)
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{
if (string.Equals(endpoint, "::1", StringComparison.OrdinalIgnoreCase))
{
return true;
}
// ipv6
if (endpoint.Split('.').Length > 4)
{
// Handle ipv4 mapped to ipv6
var originalEndpoint = endpoint;
endpoint = endpoint.Replace("::ffff:", string.Empty);
if (string.Equals(endpoint, originalEndpoint, StringComparison.OrdinalIgnoreCase))
{
return false;
}
}
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// Private address space:
// http://en.wikipedia.org/wiki/Private_network
if (endpoint.StartsWith("172.", StringComparison.OrdinalIgnoreCase))
{
return Is172AddressPrivate(endpoint);
}
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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))
{
return true;
}
if (checkSubnets && endpoint.StartsWith("192.168", StringComparison.OrdinalIgnoreCase))
{
return true;
}
if (checkSubnets && IsInPrivateAddressSpaceAndLocalSubnet(endpoint))
{
return true;
}
return false;
}
public bool IsInPrivateAddressSpaceAndLocalSubnet(string endpoint)
{
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if (endpoint.StartsWith("10.", StringComparison.OrdinalIgnoreCase))
{
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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)
{
//logger.LogDebug("subnet_Match:" + subnet_Match);
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if (endpoint.StartsWith(subnet_Match + ".", StringComparison.OrdinalIgnoreCase))
{
return true;
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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);
private List<string> GetSubnets(string endpointFirstPart)
{
lock (_subnetLookup)
{
if (_subnetLookup.TryGetValue(endpointFirstPart, out var subnets))
{
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return subnets;
}
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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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{
if (unicastIPAddressInformation.Address.AddressFamily == AddressFamily.InterNetwork && endpointFirstPart == unicastIPAddressInformation.Address.ToString().Split('.')[0])
{
int subnet_Test = 0;
foreach (string part in unicastIPAddressInformation.IPv4Mask.ToString().Split('.'))
{
if (part.Equals("0")) break;
subnet_Test++;
}
var subnet_Match = string.Join(".", unicastIPAddressInformation.Address.ToString().Split('.').Take(subnet_Test).ToArray());
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// TODO: Is this check necessary?
if (adapter.OperationalStatus == OperationalStatus.Up)
{
subnets.Add(subnet_Match);
}
}
}
}
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_subnetLookup[endpointFirstPart] = subnets;
return subnets;
}
}
private static bool Is172AddressPrivate(string endpoint)
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{
for (var i = 16; i <= 31; i++)
{
if (endpoint.StartsWith("172." + i.ToString(CultureInfo.InvariantCulture) + ".", StringComparison.OrdinalIgnoreCase))
{
return true;
}
}
return false;
}
public bool IsInLocalNetwork(string endpoint)
{
return IsInLocalNetworkInternal(endpoint, true);
}
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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);
}
private static bool IsAddressInSubnets(IPAddress address, string addressString, string[] subnets)
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{
foreach (var subnet in subnets)
{
var normalizedSubnet = subnet.Trim();
if (string.Equals(normalizedSubnet, addressString, StringComparison.OrdinalIgnoreCase))
{
return true;
}
if (normalizedSubnet.IndexOf('/') != -1)
{
var ipnetwork = IPNetwork.IPNetwork.Parse(normalizedSubnet);
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if (ipnetwork.Contains(address))
{
return true;
}
}
}
return false;
}
private bool IsInLocalNetworkInternal(string endpoint, bool resolveHost)
{
if (string.IsNullOrEmpty(endpoint))
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{
throw new ArgumentNullException(nameof(endpoint));
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}
if (IPAddress.TryParse(endpoint, out var address))
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{
var addressString = address.ToString();
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var localSubnetsFn = LocalSubnetsFn;
if (localSubnetsFn != null)
{
var localSubnets = localSubnetsFn();
foreach (var subnet in localSubnets)
{
// only validate if there's at least one valid entry
if (!string.IsNullOrWhiteSpace(subnet))
{
return IsAddressInSubnets(address, addressString, localSubnets) || IsInPrivateAddressSpace(addressString, false);
}
}
}
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int lengthMatch = 100;
if (address.AddressFamily == AddressFamily.InterNetwork)
{
lengthMatch = 4;
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if (IsInPrivateAddressSpace(addressString, true))
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{
return true;
}
}
else if (address.AddressFamily == AddressFamily.InterNetworkV6)
{
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lengthMatch = 9;
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if (IsInPrivateAddressSpace(endpoint, true))
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{
return true;
}
}
// Should be even be doing this with ipv6?
if (addressString.Length >= lengthMatch)
{
var prefix = addressString.Substring(0, lengthMatch);
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if (GetLocalIpAddresses().Any(i => i.ToString().StartsWith(prefix, StringComparison.OrdinalIgnoreCase)))
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{
return true;
}
}
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}
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else if (resolveHost)
{
if (Uri.TryCreate(endpoint, UriKind.RelativeOrAbsolute, out var uri))
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{
try
{
var host = uri.DnsSafeHost;
_logger.LogDebug("Resolving host {0}", host);
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address = GetIpAddresses(host).Result.FirstOrDefault();
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if (address != null)
{
_logger.LogDebug("{0} resolved to {1}", host, address);
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return IsInLocalNetworkInternal(address.ToString(), false);
}
}
catch (InvalidOperationException)
{
// Can happen with reverse proxy or IIS url rewriting
}
catch (Exception ex)
{
_logger.LogError(ex, "Error resolving hostname");
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}
}
}
return false;
}
private static Task<IPAddress[]> GetIpAddresses(string hostName)
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{
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return Dns.GetHostAddressesAsync(hostName);
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}
private IEnumerable<IPAddress> GetIPsDefault(bool ignoreVirtualInterface)
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{
IEnumerable<NetworkInterface> interfaces;
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try
{
interfaces = NetworkInterface.GetAllNetworkInterfaces()
.Where(x => x.OperationalStatus == OperationalStatus.Up
|| x.OperationalStatus == OperationalStatus.Unknown);
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}
catch (NetworkInformationException ex)
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{
_logger.LogError(ex, "Error in GetAllNetworkInterfaces");
return Enumerable.Empty<IPAddress>();
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}
return interfaces.SelectMany(network =>
{
var ipProperties = network.GetIPProperties();
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// Try to exclude virtual adapters
// http://stackoverflow.com/questions/8089685/c-sharp-finding-my-machines-local-ip-address-and-not-the-vms
var addr = ipProperties.GatewayAddresses.FirstOrDefault();
if (addr == null
|| (ignoreVirtualInterface
&& (addr.Address.Equals(IPAddress.Any) || addr.Address.Equals(IPAddress.IPv6Any))))
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{
return Enumerable.Empty<IPAddress>();
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}
return ipProperties.UnicastAddresses
.Select(i => i.Address)
.Where(i => i.AddressFamily == AddressFamily.InterNetwork || i.AddressFamily == AddressFamily.InterNetworkV6);
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}).GroupBy(i => i.ToString())
.Select(x => x.First());
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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
// It's not fool-proof so ultimately the consumer will have to examine them and decide
return host.AddressList
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.Where(i => i.AddressFamily == AddressFamily.InterNetwork || i.AddressFamily == AddressFamily.InterNetworkV6)
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.Reverse();
}
/// <summary>
/// Gets a random port number that is currently available
/// </summary>
/// <returns>System.Int32.</returns>
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public int GetRandomUnusedTcpPort()
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{
var listener = new TcpListener(IPAddress.Any, 0);
listener.Start();
var port = ((IPEndPoint)listener.LocalEndpoint).Port;
listener.Stop();
return port;
}
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public int GetRandomUnusedUdpPort()
{
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var localEndPoint = new IPEndPoint(IPAddress.Any, 0);
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using (var udpClient = new UdpClient(localEndPoint))
{
var port = ((IPEndPoint)(udpClient.Client.LocalEndPoint)).Port;
return port;
}
}
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private List<string> _macAddresses;
public List<string> GetMacAddresses()
{
if (_macAddresses == null)
{
_macAddresses = GetMacAddressesInternal();
}
return _macAddresses;
}
private static List<string> GetMacAddressesInternal()
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{
return NetworkInterface.GetAllNetworkInterfaces()
.Where(i => i.NetworkInterfaceType != NetworkInterfaceType.Loopback)
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.Select(i =>
{
try
{
var physicalAddress = i.GetPhysicalAddress();
if (physicalAddress == null)
{
return null;
}
return physicalAddress.ToString();
}
catch (Exception)
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{
//TODO Log exception.
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return null;
}
})
.Where(i => i != null)
.ToList();
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}
/// <summary>
/// Parses the specified endpointstring.
/// </summary>
/// <param name="endpointstring">The endpointstring.</param>
/// <returns>IPEndPoint.</returns>
public IPEndPoint Parse(string endpointstring)
{
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return Parse(endpointstring, -1).Result;
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}
/// <summary>
/// Parses the specified endpointstring.
/// </summary>
/// <param name="endpointstring">The endpointstring.</param>
/// <param name="defaultport">The defaultport.</param>
/// <returns>IPEndPoint.</returns>
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/// <exception cref="ArgumentException">Endpoint descriptor may not be empty.</exception>
/// <exception cref="FormatException"></exception>
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private static async Task<IPEndPoint> Parse(string endpointstring, int defaultport)
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{
if (string.IsNullOrEmpty(endpointstring)
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|| endpointstring.Trim().Length == 0)
{
throw new ArgumentException("Endpoint descriptor may not be empty.");
}
if (defaultport != -1 &&
(defaultport < IPEndPoint.MinPort
|| defaultport > IPEndPoint.MaxPort))
{
throw new ArgumentException(string.Format("Invalid default port '{0}'", defaultport));
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}
string[] values = endpointstring.Split(new char[] { ':' });
IPAddress ipaddy;
int port = -1;
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//check if we have an IPv6 or ports
if (values.Length <= 2) // ipv4 or hostname
{
port = values.Length == 1 ? defaultport : GetPort(values[1]);
//try to use the address as IPv4, otherwise get hostname
if (!IPAddress.TryParse(values[0], out ipaddy))
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ipaddy = await GetIPfromHost(values[0]).ConfigureAwait(false);
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}
else if (values.Length > 2) //ipv6
{
//could [a:b:c]:d
if (values[0].StartsWith("[") && values[values.Length - 2].EndsWith("]"))
{
string ipaddressstring = string.Join(":", values.Take(values.Length - 1).ToArray());
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ipaddy = IPAddress.Parse(ipaddressstring);
port = GetPort(values[values.Length - 1]);
}
else //[a:b:c] or a:b:c
{
ipaddy = IPAddress.Parse(endpointstring);
port = defaultport;
}
}
else
{
throw new FormatException(string.Format("Invalid endpoint ipaddress '{0}'", endpointstring));
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}
if (port == -1)
throw new ArgumentException(string.Format("No port specified: '{0}'", endpointstring));
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return new IPEndPoint(ipaddy, port);
}
protected static readonly CultureInfo UsCulture = new CultureInfo("en-US");
/// <summary>
/// Gets the port.
/// </summary>
/// <param name="p">The p.</param>
/// <returns>System.Int32.</returns>
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/// <exception cref="FormatException"></exception>
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private static int GetPort(string p)
{
if (!int.TryParse(p, out var port)
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|| port < IPEndPoint.MinPort
|| port > IPEndPoint.MaxPort)
{
throw new FormatException(string.Format("Invalid end point port '{0}'", p));
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}
return port;
}
/// <summary>
/// Gets the I pfrom host.
/// </summary>
/// <param name="p">The p.</param>
/// <returns>IPAddress.</returns>
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/// <exception cref="ArgumentException"></exception>
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private static async Task<IPAddress> GetIPfromHost(string p)
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{
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var hosts = await Dns.GetHostAddressesAsync(p).ConfigureAwait(false);
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if (hosts == null || hosts.Length == 0)
throw new ArgumentException(string.Format("Host not found: {0}", p));
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return hosts[0];
}
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public bool IsInSameSubnet(IPAddress address1, IPAddress address2, IPAddress subnetMask)
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{
IPAddress network1 = GetNetworkAddress(address1, subnetMask);
IPAddress network2 = GetNetworkAddress(address2, subnetMask);
return network1.Equals(network2);
}
private IPAddress GetNetworkAddress(IPAddress address, IPAddress subnetMask)
{
byte[] ipAdressBytes = address.GetAddressBytes();
byte[] subnetMaskBytes = subnetMask.GetAddressBytes();
if (ipAdressBytes.Length != subnetMaskBytes.Length)
{
throw new ArgumentException("Lengths of IP address and subnet mask do not match.");
}
byte[] broadcastAddress = new byte[ipAdressBytes.Length];
for (int i = 0; i < broadcastAddress.Length; i++)
{
broadcastAddress[i] = (byte)(ipAdressBytes[i] & (subnetMaskBytes[i]));
}
return new IPAddress(broadcastAddress);
}
public IPAddress GetLocalIpSubnetMask(IPAddress address)
{
NetworkInterface[] interfaces;
try
{
var validStatuses = new[] { OperationalStatus.Up, OperationalStatus.Unknown };
interfaces = NetworkInterface.GetAllNetworkInterfaces()
.Where(i => validStatuses.Contains(i.OperationalStatus))
.ToArray();
}
catch (Exception ex)
{
_logger.LogError(ex, "Error in GetAllNetworkInterfaces");
return null;
}
foreach (NetworkInterface ni in interfaces)
{
if (ni.GetIPProperties().GatewayAddresses.FirstOrDefault() != null)
{
foreach (UnicastIPAddressInformation ip in ni.GetIPProperties().UnicastAddresses)
{
if (ip.Address.Equals(address) && ip.IPv4Mask != null)
{
return ip.IPv4Mask;
}
}
}
}
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return null;
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}
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/// <summary>
/// Gets the network shares.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>IEnumerable{NetworkShare}.</returns>
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public virtual IEnumerable<NetworkShare> GetNetworkShares(string path)
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{
return new List<NetworkShare>();
}
/// <summary>
/// Gets available devices within the domain
/// </summary>
/// <returns>PC's in the Domain</returns>
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public virtual IEnumerable<FileSystemEntryInfo> GetNetworkDevices()
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{
return new List<FileSystemEntryInfo>();
}
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}
}