557 lines
19 KiB
C#
557 lines
19 KiB
C#
#pragma warning disable CS1591
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Net;
|
|
using System.Net.NetworkInformation;
|
|
using System.Net.Sockets;
|
|
using System.Threading.Tasks;
|
|
using MediaBrowser.Common.Net;
|
|
using Microsoft.Extensions.Logging;
|
|
|
|
namespace Emby.Server.Implementations.Networking
|
|
{
|
|
/// <summary>
|
|
/// Class to take care of network interface management.
|
|
/// </summary>
|
|
public class NetworkManager : INetworkManager
|
|
{
|
|
private readonly ILogger<NetworkManager> _logger;
|
|
|
|
private IPAddress[] _localIpAddresses;
|
|
private readonly object _localIpAddressSyncLock = new object();
|
|
|
|
private readonly object _subnetLookupLock = new object();
|
|
private readonly Dictionary<string, List<string>> _subnetLookup = new Dictionary<string, List<string>>(StringComparer.Ordinal);
|
|
|
|
private List<PhysicalAddress> _macAddresses;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="NetworkManager"/> class.
|
|
/// </summary>
|
|
/// <param name="logger">Logger to use for messages.</param>
|
|
public NetworkManager(ILogger<NetworkManager> logger)
|
|
{
|
|
_logger = logger;
|
|
|
|
NetworkChange.NetworkAddressChanged += OnNetworkAddressChanged;
|
|
NetworkChange.NetworkAvailabilityChanged += OnNetworkAvailabilityChanged;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public event EventHandler NetworkChanged;
|
|
|
|
/// <inheritdoc/>
|
|
public Func<string[]> LocalSubnetsFn { get; set; }
|
|
|
|
private void OnNetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
|
|
{
|
|
_logger.LogDebug("NetworkAvailabilityChanged");
|
|
OnNetworkChanged();
|
|
}
|
|
|
|
private void OnNetworkAddressChanged(object sender, EventArgs e)
|
|
{
|
|
_logger.LogDebug("NetworkAddressChanged");
|
|
OnNetworkChanged();
|
|
}
|
|
|
|
private void OnNetworkChanged()
|
|
{
|
|
lock (_localIpAddressSyncLock)
|
|
{
|
|
_localIpAddresses = null;
|
|
_macAddresses = null;
|
|
}
|
|
|
|
NetworkChanged?.Invoke(this, EventArgs.Empty);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public IPAddress[] GetLocalIpAddresses()
|
|
{
|
|
lock (_localIpAddressSyncLock)
|
|
{
|
|
if (_localIpAddresses == null)
|
|
{
|
|
var addresses = GetLocalIpAddressesInternal().ToArray();
|
|
|
|
_localIpAddresses = addresses;
|
|
}
|
|
|
|
return _localIpAddresses;
|
|
}
|
|
}
|
|
|
|
private List<IPAddress> GetLocalIpAddressesInternal()
|
|
{
|
|
var list = GetIPsDefault().ToList();
|
|
|
|
if (list.Count == 0)
|
|
{
|
|
list = GetLocalIpAddressesFallback().GetAwaiter().GetResult().ToList();
|
|
}
|
|
|
|
var listClone = new List<IPAddress>();
|
|
|
|
var subnets = LocalSubnetsFn();
|
|
|
|
foreach (var i in list)
|
|
{
|
|
if (i.IsIPv6LinkLocal || i.ToString().StartsWith("169.254.", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (Array.IndexOf(subnets, $"[{i}]") == -1)
|
|
{
|
|
listClone.Add(i);
|
|
}
|
|
}
|
|
|
|
return listClone
|
|
.OrderBy(i => i.AddressFamily == AddressFamily.InterNetwork ? 0 : 1)
|
|
// .ThenBy(i => listClone.IndexOf(i))
|
|
.GroupBy(i => i.ToString())
|
|
.Select(x => x.First())
|
|
.ToList();
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsInPrivateAddressSpace(string endpoint)
|
|
{
|
|
return IsInPrivateAddressSpace(endpoint, true);
|
|
}
|
|
|
|
// Checks if the address in endpoint is an RFC1918, RFC1122, or RFC3927 address
|
|
private bool IsInPrivateAddressSpace(string endpoint, bool checkSubnets)
|
|
{
|
|
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, StringComparison.OrdinalIgnoreCase);
|
|
|
|
if (string.Equals(endpoint, originalEndpoint, StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Private address space:
|
|
|
|
if (string.Equals(endpoint, "localhost", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
if (!IPAddress.TryParse(endpoint, out var ipAddress))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
byte[] octet = ipAddress.GetAddressBytes();
|
|
|
|
if ((octet[0] == 10) ||
|
|
(octet[0] == 172 && (octet[1] >= 16 && octet[1] <= 31)) || // RFC1918
|
|
(octet[0] == 192 && octet[1] == 168) || // RFC1918
|
|
(octet[0] == 127) || // RFC1122
|
|
(octet[0] == 169 && octet[1] == 254)) // RFC3927
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (checkSubnets && IsInPrivateAddressSpaceAndLocalSubnet(endpoint))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsInPrivateAddressSpaceAndLocalSubnet(string endpoint)
|
|
{
|
|
if (endpoint.StartsWith("10.", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
var endpointFirstPart = endpoint.Split('.')[0];
|
|
|
|
var subnets = GetSubnets(endpointFirstPart);
|
|
|
|
foreach (var subnet_Match in subnets)
|
|
{
|
|
// logger.LogDebug("subnet_Match:" + subnet_Match);
|
|
|
|
if (endpoint.StartsWith(subnet_Match + ".", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Gives a list of possible subnets from the system whose interface ip starts with endpointFirstPart
|
|
private List<string> GetSubnets(string endpointFirstPart)
|
|
{
|
|
lock (_subnetLookupLock)
|
|
{
|
|
if (_subnetLookup.TryGetValue(endpointFirstPart, out var subnets))
|
|
{
|
|
return subnets;
|
|
}
|
|
|
|
subnets = new List<string>();
|
|
|
|
foreach (var adapter in NetworkInterface.GetAllNetworkInterfaces())
|
|
{
|
|
foreach (var unicastIPAddressInformation in adapter.GetIPProperties().UnicastAddresses)
|
|
{
|
|
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", StringComparison.Ordinal))
|
|
{
|
|
break;
|
|
}
|
|
|
|
subnet_Test++;
|
|
}
|
|
|
|
var subnet_Match = string.Join(".", unicastIPAddressInformation.Address.ToString().Split('.').Take(subnet_Test).ToArray());
|
|
|
|
// TODO: Is this check necessary?
|
|
if (adapter.OperationalStatus == OperationalStatus.Up)
|
|
{
|
|
subnets.Add(subnet_Match);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
_subnetLookup[endpointFirstPart] = subnets;
|
|
|
|
return subnets;
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsInLocalNetwork(string endpoint)
|
|
{
|
|
return IsInLocalNetworkInternal(endpoint, true);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsAddressInSubnets(string addressString, string[] subnets)
|
|
{
|
|
return IsAddressInSubnets(IPAddress.Parse(addressString), addressString, subnets);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsAddressInSubnets(IPAddress address, bool excludeInterfaces, bool excludeRFC)
|
|
{
|
|
byte[] octet = address.GetAddressBytes();
|
|
|
|
if ((octet[0] == 127) || // RFC1122
|
|
(octet[0] == 169 && octet[1] == 254)) // RFC3927
|
|
{
|
|
// don't use on loopback or 169 interfaces
|
|
return false;
|
|
}
|
|
|
|
string addressString = address.ToString();
|
|
string excludeAddress = "[" + addressString + "]";
|
|
var subnets = LocalSubnetsFn();
|
|
|
|
// Include any address if LAN subnets aren't specified
|
|
if (subnets.Length == 0)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Exclude any addresses if they appear in the LAN list in [ ]
|
|
if (Array.IndexOf(subnets, excludeAddress) != -1)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return IsAddressInSubnets(address, addressString, subnets);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks if the give address falls within the ranges given in [subnets]. The addresses in subnets can be hosts or subnets in the CIDR format.
|
|
/// </summary>
|
|
/// <param name="address">IPAddress version of the address.</param>
|
|
/// <param name="addressString">The address to check.</param>
|
|
/// <param name="subnets">If true, check against addresses in the LAN settings which have [] arroud and return true if it matches the address give in address.</param>
|
|
/// <returns><c>false</c>if the address isn't in the subnets, <c>true</c> otherwise.</returns>
|
|
private static bool IsAddressInSubnets(IPAddress address, string addressString, string[] subnets)
|
|
{
|
|
foreach (var subnet in subnets)
|
|
{
|
|
var normalizedSubnet = subnet.Trim();
|
|
// Is the subnet a host address and does it match the address being passes?
|
|
if (string.Equals(normalizedSubnet, addressString, StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Parse CIDR subnets and see if address falls within it.
|
|
if (normalizedSubnet.Contains('/', StringComparison.Ordinal))
|
|
{
|
|
try
|
|
{
|
|
var ipNetwork = IPNetwork.Parse(normalizedSubnet);
|
|
if (ipNetwork.Contains(address))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
// Ignoring - invalid subnet passed encountered.
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private bool IsInLocalNetworkInternal(string endpoint, bool resolveHost)
|
|
{
|
|
if (string.IsNullOrEmpty(endpoint))
|
|
{
|
|
throw new ArgumentNullException(nameof(endpoint));
|
|
}
|
|
|
|
if (IPAddress.TryParse(endpoint, out var address))
|
|
{
|
|
var addressString = address.ToString();
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
int lengthMatch = 100;
|
|
if (address.AddressFamily == AddressFamily.InterNetwork)
|
|
{
|
|
lengthMatch = 4;
|
|
if (IsInPrivateAddressSpace(addressString, true))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
else if (address.AddressFamily == AddressFamily.InterNetworkV6)
|
|
{
|
|
lengthMatch = 9;
|
|
if (IsInPrivateAddressSpace(endpoint, true))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Should be even be doing this with ipv6?
|
|
if (addressString.Length >= lengthMatch)
|
|
{
|
|
var prefix = addressString.Substring(0, lengthMatch);
|
|
|
|
if (GetLocalIpAddresses().Any(i => i.ToString().StartsWith(prefix, StringComparison.OrdinalIgnoreCase)))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
else if (resolveHost)
|
|
{
|
|
if (Uri.TryCreate(endpoint, UriKind.RelativeOrAbsolute, out var uri))
|
|
{
|
|
try
|
|
{
|
|
var host = uri.DnsSafeHost;
|
|
_logger.LogDebug("Resolving host {0}", host);
|
|
|
|
address = GetIpAddresses(host).GetAwaiter().GetResult().FirstOrDefault();
|
|
|
|
if (address != null)
|
|
{
|
|
_logger.LogDebug("{0} resolved to {1}", host, address);
|
|
|
|
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");
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private static Task<IPAddress[]> GetIpAddresses(string hostName)
|
|
{
|
|
return Dns.GetHostAddressesAsync(hostName);
|
|
}
|
|
|
|
private IEnumerable<IPAddress> GetIPsDefault()
|
|
{
|
|
IEnumerable<NetworkInterface> interfaces;
|
|
|
|
try
|
|
{
|
|
interfaces = NetworkInterface.GetAllNetworkInterfaces()
|
|
.Where(x => x.OperationalStatus == OperationalStatus.Up
|
|
|| x.OperationalStatus == OperationalStatus.Unknown);
|
|
}
|
|
catch (NetworkInformationException ex)
|
|
{
|
|
_logger.LogError(ex, "Error in GetAllNetworkInterfaces");
|
|
return Enumerable.Empty<IPAddress>();
|
|
}
|
|
|
|
return interfaces.SelectMany(network =>
|
|
{
|
|
var ipProperties = network.GetIPProperties();
|
|
|
|
// Exclude any addresses if they appear in the LAN list in [ ]
|
|
|
|
return ipProperties.UnicastAddresses
|
|
.Select(i => i.Address)
|
|
.Where(i => i.AddressFamily == AddressFamily.InterNetwork || i.AddressFamily == AddressFamily.InterNetworkV6);
|
|
}).GroupBy(i => i.ToString())
|
|
.Select(x => x.First());
|
|
}
|
|
|
|
private static async Task<IEnumerable<IPAddress>> GetLocalIpAddressesFallback()
|
|
{
|
|
var host = await Dns.GetHostEntryAsync(Dns.GetHostName()).ConfigureAwait(false);
|
|
|
|
// 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
|
|
.Where(i => i.AddressFamily == AddressFamily.InterNetwork || i.AddressFamily == AddressFamily.InterNetworkV6)
|
|
.Reverse();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets a random port number that is currently available.
|
|
/// </summary>
|
|
/// <returns>System.Int32.</returns>
|
|
public int GetRandomUnusedTcpPort()
|
|
{
|
|
var listener = new TcpListener(IPAddress.Any, 0);
|
|
listener.Start();
|
|
var port = ((IPEndPoint)listener.LocalEndpoint).Port;
|
|
listener.Stop();
|
|
return port;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public int GetRandomUnusedUdpPort()
|
|
{
|
|
var localEndPoint = new IPEndPoint(IPAddress.Any, 0);
|
|
using (var udpClient = new UdpClient(localEndPoint))
|
|
{
|
|
return ((IPEndPoint)udpClient.Client.LocalEndPoint).Port;
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public List<PhysicalAddress> GetMacAddresses()
|
|
{
|
|
return _macAddresses ??= GetMacAddressesInternal().ToList();
|
|
}
|
|
|
|
private static IEnumerable<PhysicalAddress> GetMacAddressesInternal()
|
|
=> NetworkInterface.GetAllNetworkInterfaces()
|
|
.Where(i => i.NetworkInterfaceType != NetworkInterfaceType.Loopback)
|
|
.Select(x => x.GetPhysicalAddress())
|
|
.Where(x => !x.Equals(PhysicalAddress.None));
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsInSameSubnet(IPAddress address1, IPAddress address2, IPAddress subnetMask)
|
|
{
|
|
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);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
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)
|
|
{
|
|
foreach (UnicastIPAddressInformation ip in ni.GetIPProperties().UnicastAddresses)
|
|
{
|
|
if (ip.Address.Equals(address) && ip.IPv4Mask != null)
|
|
{
|
|
return ip.IPv4Mask;
|
|
}
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
}
|