using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Net.Sockets; using System.Threading.Tasks; using Emby.Common.Implementations.Networking; using MediaBrowser.Model.Logging; using MediaBrowser.Model.Net; namespace Emby.Common.Implementations.Net { public class SocketFactory : ISocketFactory { // THIS IS A LINKED FILE - SHARED AMONGST MULTIPLE PLATFORMS // Be careful to check any changes compile and work for all platform projects it is shared in. // Not entirely happy with this. Would have liked to have done something more generic/reusable, // but that wasn't really the point so kept to YAGNI principal for now, even if the // interfaces are a bit ugly, specific and make assumptions. private readonly ILogger _logger; public SocketFactory(ILogger logger) { if (logger == null) { throw new ArgumentNullException("logger"); } _logger = logger; } public IAcceptSocket CreateSocket(IpAddressFamily family, MediaBrowser.Model.Net.SocketType socketType, MediaBrowser.Model.Net.ProtocolType protocolType, bool dualMode) { try { var addressFamily = family == IpAddressFamily.InterNetwork ? AddressFamily.InterNetwork : AddressFamily.InterNetworkV6; var socket = new Socket(addressFamily, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp); if (dualMode) { socket.DualMode = true; } return new NetAcceptSocket(socket, _logger, dualMode); } catch (SocketException ex) { throw new SocketCreateException(ex.SocketErrorCode.ToString(), ex); } catch (ArgumentException ex) { if (dualMode) { // Mono for BSD incorrectly throws ArgumentException instead of SocketException throw new SocketCreateException("AddressFamilyNotSupported", ex); } else { throw; } } } public ISocket CreateTcpSocket(IpAddressInfo remoteAddress, int remotePort) { if (remotePort < 0) throw new ArgumentException("remotePort cannot be less than zero.", "remotePort"); var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp); try { retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); return new UdpSocket(retVal, new IpEndPointInfo(remoteAddress, remotePort)); } catch { if (retVal != null) retVal.Dispose(); throw; } } /// /// Creates a new UDP acceptSocket and binds it to the specified local port. /// /// An integer specifying the local port to bind the acceptSocket to. public ISocket CreateUdpSocket(int localPort) { if (localPort < 0) throw new ArgumentException("localPort cannot be less than zero.", "localPort"); var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp); try { retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); return new UdpSocket(retVal, localPort, IPAddress.Any); } catch { if (retVal != null) retVal.Dispose(); throw; } } public ISocket CreateUdpBroadcastSocket(int localPort) { if (localPort < 0) throw new ArgumentException("localPort cannot be less than zero.", "localPort"); var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp); try { retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1); return new UdpSocket(retVal, localPort, IPAddress.Any); } catch { if (retVal != null) retVal.Dispose(); throw; } } /// /// Creates a new UDP acceptSocket that is a member of the SSDP multicast local admin group and binds it to the specified local port. /// /// An implementation of the interface used by RSSDP components to perform acceptSocket operations. public ISocket CreateSsdpUdpSocket(IpAddressInfo localIpAddress, int localPort) { if (localPort < 0) throw new ArgumentException("localPort cannot be less than zero.", "localPort"); var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp); try { retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); retVal.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 4); var localIp = NetworkManager.ToIPAddress(localIpAddress); retVal.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(IPAddress.Parse("239.255.255.250"), localIp)); return new UdpSocket(retVal, localPort, localIp); } catch { if (retVal != null) retVal.Dispose(); throw; } } /// /// Creates a new UDP acceptSocket that is a member of the specified multicast IP address, and binds it to the specified local port. /// /// The multicast IP address to make the acceptSocket a member of. /// The multicast time to live value for the acceptSocket. /// The number of the local port to bind to. /// public ISocket CreateUdpMulticastSocket(string ipAddress, int multicastTimeToLive, int localPort) { if (ipAddress == null) throw new ArgumentNullException("ipAddress"); if (ipAddress.Length == 0) throw new ArgumentException("ipAddress cannot be an empty string.", "ipAddress"); if (multicastTimeToLive <= 0) throw new ArgumentException("multicastTimeToLive cannot be zero or less.", "multicastTimeToLive"); if (localPort < 0) throw new ArgumentException("localPort cannot be less than zero.", "localPort"); var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp); try { #if NET46 retVal.ExclusiveAddressUse = false; #else // The ExclusiveAddressUse acceptSocket option is a Windows-specific option that, when set to "true," tells Windows not to allow another acceptSocket to use the same local address as this acceptSocket // See https://github.com/dotnet/corefx/pull/11509 for more details if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(System.Runtime.InteropServices.OSPlatform.Windows)) { retVal.ExclusiveAddressUse = false; } #endif //retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true); retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); retVal.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, multicastTimeToLive); var localIp = IPAddress.Any; retVal.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(IPAddress.Parse(ipAddress), localIp)); retVal.MulticastLoopback = true; return new UdpSocket(retVal, localPort, localIp); } catch { if (retVal != null) retVal.Dispose(); throw; } } } }