diff options
Diffstat (limited to 'Emby.Server.Implementations/Networking/NetworkManager.cs')
| -rw-r--r-- | Emby.Server.Implementations/Networking/NetworkManager.cs | 556 |
1 files changed, 0 insertions, 556 deletions
diff --git a/Emby.Server.Implementations/Networking/NetworkManager.cs b/Emby.Server.Implementations/Networking/NetworkManager.cs deleted file mode 100644 index 089ec30e6..000000000 --- a/Emby.Server.Implementations/Networking/NetworkManager.cs +++ /dev/null @@ -1,556 +0,0 @@ -#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 true; - } - - 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; - } - } -} |