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jellyfin/MediaBrowser.Common.Impleme.../Networking/BaseNetworkManager.cs

378 lines
12 KiB

using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
namespace MediaBrowser.Common.Implementations.Networking
{
public abstract class BaseNetworkManager
{
protected ILogger Logger { get; private set; }
protected BaseNetworkManager(ILogger logger)
{
Logger = logger;
}
private volatile List<string> _localIpAddresses;
private readonly object _localIpAddressSyncLock = new object();
/// <summary>
/// Gets the machine's local ip address
/// </summary>
/// <returns>IPAddress.</returns>
public IEnumerable<string> GetLocalIpAddresses()
{
if (_localIpAddresses == null)
{
lock (_localIpAddressSyncLock)
{
if (_localIpAddresses == null)
{
var addresses = GetLocalIpAddressesInternal().ToList();
_localIpAddresses = addresses;
BindEvents();
return addresses;
}
}
}
return _localIpAddresses;
}
private void BindEvents()
{
NetworkChange.NetworkAddressChanged -= NetworkChange_NetworkAddressChanged;
NetworkChange.NetworkAvailabilityChanged -= NetworkChange_NetworkAvailabilityChanged;
NetworkChange.NetworkAddressChanged += NetworkChange_NetworkAddressChanged;
NetworkChange.NetworkAvailabilityChanged += NetworkChange_NetworkAvailabilityChanged;
}
void NetworkChange_NetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
{
Logger.Debug("NetworkAvailabilityChanged fired. Resetting cached network info.");
lock (_localIpAddressSyncLock)
{
_localIpAddresses = null;
}
}
void NetworkChange_NetworkAddressChanged(object sender, EventArgs e)
{
Logger.Debug("NetworkAddressChanged fired. Resetting cached network info.");
lock (_localIpAddressSyncLock)
{
_localIpAddresses = null;
}
}
private IEnumerable<string> GetLocalIpAddressesInternal()
{
var list = GetIPsDefault()
.Where(i => !IPAddress.IsLoopback(i))
.Select(i => i.ToString())
.Where(FilterIpAddress)
.ToList();
if (list.Count > 0)
{
return list;
}
return GetLocalIpAddressesFallback().Where(FilterIpAddress);
}
private bool FilterIpAddress(string address)
{
if (address.StartsWith("169.", StringComparison.OrdinalIgnoreCase))
{
return false;
}
return true;
}
private bool IsInPrivateAddressSpace(string endpoint)
{
// Private address space:
// http://en.wikipedia.org/wiki/Private_network
if (endpoint.StartsWith("172.", StringComparison.OrdinalIgnoreCase))
{
return Is172AddressPrivate(endpoint);
}
return
// If url was requested with computer name, we may see this
endpoint.IndexOf("::", StringComparison.OrdinalIgnoreCase) != -1 ||
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");
}
if (IsInPrivateAddressSpace(endpoint))
{
return true;
}
const int lengthMatch = 4;
if (endpoint.Length >= lengthMatch)
{
var prefix = endpoint.Substring(0, lengthMatch);
if (GetLocalIpAddresses()
.Any(i => i.StartsWith(prefix, StringComparison.OrdinalIgnoreCase)))
{
return true;
}
}
IPAddress address;
if (resolveHost && !IPAddress.TryParse(endpoint, out address))
{
Uri uri;
if (Uri.TryCreate(endpoint, UriKind.RelativeOrAbsolute, out uri))
{
var host = uri.DnsSafeHost;
Logger.Debug("Resolving host {0}", host);
try
{
address = GetIpAddresses(host).FirstOrDefault();
if (address != null)
{
Logger.Debug("{0} resolved to {1}", host, address);
return IsInLocalNetworkInternal(address.ToString(), false);
}
}
catch (Exception ex)
{
Logger.ErrorException("Error resovling hostname {0}", ex, host);
}
}
}
return false;
}
public IEnumerable<IPAddress> GetIpAddresses(string hostName)
{
return Dns.GetHostAddresses(hostName);
}
private IEnumerable<IPAddress> GetIPsDefault()
{
foreach (var adapter in NetworkInterface.GetAllNetworkInterfaces())
{
var props = adapter.GetIPProperties();
var gateways = from ga in props.GatewayAddresses
where !ga.Address.Equals(IPAddress.Any)
select true;
if (!gateways.Any())
{
continue;
}
foreach (var uni in props.UnicastAddresses)
{
var address = uni.Address;
if (address.AddressFamily != AddressFamily.InterNetwork)
{
continue;
}
yield return address;
}
}
}
private IEnumerable<string> GetLocalIpAddressesFallback()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
// 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)
.Select(i => i.ToString())
.Reverse();
}
/// <summary>
/// Gets a random port number that is currently available
/// </summary>
/// <returns>System.Int32.</returns>
public int GetRandomUnusedPort()
{
var listener = new TcpListener(IPAddress.Any, 0);
listener.Start();
var port = ((IPEndPoint)listener.LocalEndpoint).Port;
listener.Stop();
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);
}
/// <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 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 = GetIPfromHost(values[0]);
}
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 IPAddress GetIPfromHost(string p)
{
var hosts = Dns.GetHostAddresses(p);
if (hosts == null || hosts.Length == 0)
throw new ArgumentException(String.Format("Host not found: {0}", p));
return hosts[0];
}
}
}