diff options
Diffstat (limited to 'Emby.Server.Implementations/Networking/NetworkManager.cs')
| -rw-r--r-- | Emby.Server.Implementations/Networking/NetworkManager.cs | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/Networking/NetworkManager.cs b/Emby.Server.Implementations/Networking/NetworkManager.cs new file mode 100644 index 000000000..b47c058df --- /dev/null +++ b/Emby.Server.Implementations/Networking/NetworkManager.cs @@ -0,0 +1,531 @@ +using System; +using System.Collections.Generic; +using System.Globalization; +using System.Linq; +using System.Net; +using System.Net.NetworkInformation; +using System.Net.Sockets; +using System.Threading.Tasks; +using MediaBrowser.Common.Net; +using MediaBrowser.Model.Extensions; +using MediaBrowser.Model.IO; +using MediaBrowser.Model.Logging; +using MediaBrowser.Model.Net; + +namespace Emby.Server.Implementations.Networking +{ + public class NetworkManager : INetworkManager + { + protected ILogger Logger { get; private set; } + private DateTime _lastRefresh; + + public NetworkManager(ILogger logger) + { + Logger = logger; + } + + private List<IpAddressInfo> _localIpAddresses; + private readonly object _localIpAddressSyncLock = new object(); + + public List<IpAddressInfo> GetLocalIpAddresses() + { + const int cacheMinutes = 5; + + lock (_localIpAddressSyncLock) + { + var forceRefresh = (DateTime.UtcNow - _lastRefresh).TotalMinutes >= cacheMinutes; + + if (_localIpAddresses == null || forceRefresh) + { + var addresses = GetLocalIpAddressesInternal().Select(ToIpAddressInfo).ToList(); + + _localIpAddresses = addresses; + _lastRefresh = DateTime.UtcNow; + + return addresses; + } + } + + return _localIpAddresses; + } + + private IEnumerable<IPAddress> GetLocalIpAddressesInternal() + { + var list = GetIPsDefault() + .ToList(); + + if (list.Count == 0) + { + list.AddRange(GetLocalIpAddressesFallback().Result); + } + + return list.Where(FilterIpAddress).DistinctBy(i => i.ToString()); + } + + private bool FilterIpAddress(IPAddress address) + { + var addressString = address.ToString(); + + if (addressString.StartsWith("169.", StringComparison.OrdinalIgnoreCase)) + { + return false; + } + + return true; + } + + public bool IsInPrivateAddressSpace(string endpoint) + { + if (string.Equals(endpoint, "::1", StringComparison.OrdinalIgnoreCase)) + { + return true; + } + + // Handle ipv4 mapped to ipv6 + endpoint = endpoint.Replace("::ffff:", string.Empty); + + // Private address space: + // http://en.wikipedia.org/wiki/Private_network + + if (endpoint.StartsWith("172.", StringComparison.OrdinalIgnoreCase)) + { + return Is172AddressPrivate(endpoint); + } + + return + + endpoint.StartsWith("localhost", StringComparison.OrdinalIgnoreCase) || + endpoint.StartsWith("127.", StringComparison.OrdinalIgnoreCase) || + endpoint.StartsWith("10.", StringComparison.OrdinalIgnoreCase) || + endpoint.StartsWith("192.168", StringComparison.OrdinalIgnoreCase) || + endpoint.StartsWith("169.", StringComparison.OrdinalIgnoreCase); + } + + private bool Is172AddressPrivate(string endpoint) + { + 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); + } + + public bool IsInLocalNetworkInternal(string endpoint, bool resolveHost) + { + if (string.IsNullOrWhiteSpace(endpoint)) + { + throw new ArgumentNullException("endpoint"); + } + + IPAddress address; + if (IPAddress.TryParse(endpoint, out address)) + { + var addressString = address.ToString(); + + int lengthMatch = 100; + if (address.AddressFamily == AddressFamily.InterNetwork) + { + lengthMatch = 4; + if (IsInPrivateAddressSpace(addressString)) + { + return true; + } + } + else if (address.AddressFamily == AddressFamily.InterNetworkV6) + { + lengthMatch = 10; + if (IsInPrivateAddressSpace(endpoint)) + { + 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) + { + Uri uri; + if (Uri.TryCreate(endpoint, UriKind.RelativeOrAbsolute, out uri)) + { + try + { + var host = uri.DnsSafeHost; + Logger.Debug("Resolving host {0}", host); + + address = GetIpAddresses(host).Result.FirstOrDefault(); + + if (address != null) + { + Logger.Debug("{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.ErrorException("Error resovling hostname", ex); + } + } + } + + return false; + } + + private Task<IPAddress[]> GetIpAddresses(string hostName) + { + return Dns.GetHostAddressesAsync(hostName); + } + + private readonly List<NetworkInterfaceType> _validNetworkInterfaceTypes = new List<NetworkInterfaceType> + { + NetworkInterfaceType.Ethernet, + NetworkInterfaceType.Wireless80211 + }; + + private List<IPAddress> GetIPsDefault() + { + NetworkInterface[] interfaces; + + try + { + var validStatuses = new[] { OperationalStatus.Up, OperationalStatus.Unknown }; + + interfaces = NetworkInterface.GetAllNetworkInterfaces() + .Where(i => validStatuses.Contains(i.OperationalStatus)) + .ToArray(); + } + catch (Exception ex) + { + Logger.ErrorException("Error in GetAllNetworkInterfaces", ex); + return new List<IPAddress>(); + } + + return interfaces.SelectMany(network => + { + + try + { + Logger.Debug("Querying interface: {0}. Type: {1}. Status: {2}", network.Name, network.NetworkInterfaceType, network.OperationalStatus); + + var ipProperties = network.GetIPProperties(); + + // 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 || string.Equals(addr.Address.ToString(), "0.0.0.0", StringComparison.OrdinalIgnoreCase)) + { + return new List<IPAddress>(); + } + + //if (!_validNetworkInterfaceTypes.Contains(network.NetworkInterfaceType)) + //{ + // return new List<IPAddress>(); + //} + + return ipProperties.UnicastAddresses + //.Where(i => i.IsDnsEligible) + .Select(i => i.Address) + .Where(i => i.AddressFamily == AddressFamily.InterNetwork) + .ToList(); + } + catch (Exception ex) + { + Logger.ErrorException("Error querying network interface", ex); + return new List<IPAddress>(); + } + + }).DistinctBy(i => i.ToString()) + .ToList(); + } + + private 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) + .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; + } + + public int GetRandomUnusedUdpPort() + { + IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, 0); + using (var udpClient = new UdpClient(localEndPoint)) + { + var port = ((IPEndPoint)(udpClient.Client.LocalEndPoint)).Port; + return port; + } + } + + /// <summary> + /// Returns MAC Address from first Network Card in Computer + /// </summary> + /// <returns>[string] MAC Address</returns> + public string GetMacAddress() + { + return NetworkInterface.GetAllNetworkInterfaces() + .Where(i => i.NetworkInterfaceType != NetworkInterfaceType.Loopback) + .Select(i => BitConverter.ToString(i.GetPhysicalAddress().GetAddressBytes())) + .FirstOrDefault(); + } + + /// <summary> + /// Parses the specified endpointstring. + /// </summary> + /// <param name="endpointstring">The endpointstring.</param> + /// <returns>IPEndPoint.</returns> + public IPEndPoint Parse(string endpointstring) + { + return Parse(endpointstring, -1).Result; + } + + /// <summary> + /// Parses the specified endpointstring. + /// </summary> + /// <param name="endpointstring">The endpointstring.</param> + /// <param name="defaultport">The defaultport.</param> + /// <returns>IPEndPoint.</returns> + /// <exception cref="System.ArgumentException">Endpoint descriptor may not be empty.</exception> + /// <exception cref="System.FormatException"></exception> + private static async Task<IPEndPoint> Parse(string endpointstring, int defaultport) + { + if (String.IsNullOrEmpty(endpointstring) + || 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)); + } + + string[] values = endpointstring.Split(new char[] { ':' }); + IPAddress ipaddy; + int port = -1; + + //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)) + ipaddy = await GetIPfromHost(values[0]).ConfigureAwait(false); + } + 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()); + 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)); + } + + if (port == -1) + throw new ArgumentException(String.Format("No port specified: '{0}'", endpointstring)); + + 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> + /// <exception cref="System.FormatException"></exception> + private static int GetPort(string p) + { + int port; + + if (!Int32.TryParse(p, out 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="System.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) + { + IpAddressInfo info; + if (TryParseIpAddress(ipAddress, out info)) + { + return info; + } + + throw new ArgumentException("Invalid ip address: " + ipAddress); + } + + public bool TryParseIpAddress(string ipAddress, out IpAddressInfo ipAddressInfo) + { + IPAddress address; + if (IPAddress.TryParse(ipAddress, out 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(addresses.Length); + } + + /// <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>(); + } + } +} |