diff options
Diffstat (limited to 'Emby.Server.Implementations/Net/SocketFactory.cs')
| -rw-r--r-- | Emby.Server.Implementations/Net/SocketFactory.cs | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/Net/SocketFactory.cs b/Emby.Server.Implementations/Net/SocketFactory.cs new file mode 100644 index 000000000..f78fbdfd7 --- /dev/null +++ b/Emby.Server.Implementations/Net/SocketFactory.cs @@ -0,0 +1,303 @@ +using System; +using System.IO; +using System.Net; +using System.Net.Sockets; +using Emby.Server.Implementations.Networking; +using MediaBrowser.Model.Logging; +using MediaBrowser.Model.Net; + +namespace Emby.Server.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 addressFamily = remoteAddress.AddressFamily == IpAddressFamily.InterNetwork + ? AddressFamily.InterNetwork + : AddressFamily.InterNetworkV6; + + var retVal = new Socket(addressFamily, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp); + + try + { + retVal.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); + } + catch (SocketException) + { + // This is not supported on all operating systems (qnap) + } + + try + { + return new UdpSocket(retVal, new IpEndPointInfo(remoteAddress, remotePort)); + } + catch + { + if (retVal != null) + retVal.Dispose(); + + throw; + } + } + + /// <summary> + /// Creates a new UDP acceptSocket and binds it to the specified local port. + /// </summary> + /// <param name="localPort">An integer specifying the local port to bind the acceptSocket to.</param> + 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; + } + } + + /// <summary> + /// Creates a new UDP acceptSocket that is a member of the SSDP multicast local admin group and binds it to the specified local port. + /// </summary> + /// <returns>An implementation of the <see cref="ISocket"/> interface used by RSSDP components to perform acceptSocket operations.</returns> + 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; + } + } + + /// <summary> + /// Creates a new UDP acceptSocket that is a member of the specified multicast IP address, and binds it to the specified local port. + /// </summary> + /// <param name="ipAddress">The multicast IP address to make the acceptSocket a member of.</param> + /// <param name="multicastTimeToLive">The multicast time to live value for the acceptSocket.</param> + /// <param name="localPort">The number of the local port to bind to.</param> + /// <returns></returns> + 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 + { + // not supported on all platforms. throws on ubuntu with .net core 2.0 + retVal.ExclusiveAddressUse = false; + } + catch (SocketException) + { + + } + + try + { + //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; + } + } + + public Stream CreateNetworkStream(ISocket socket, bool ownsSocket) + { + var netSocket = (UdpSocket)socket; + + return new SocketStream(netSocket.Socket, ownsSocket); + } + } + + public class SocketStream : Stream + { + private readonly Socket _socket; + + public SocketStream(Socket socket, bool ownsSocket) + { + _socket = socket; + } + + public override void Flush() + { + } + + public override bool CanRead + { + get { return true; } + } + public override bool CanSeek + { + get { return false; } + } + public override bool CanWrite + { + get { return true; } + } + public override long Length + { + get { throw new NotImplementedException(); } + } + public override long Position + { + get { throw new NotImplementedException(); } + set { throw new NotImplementedException(); } + } + + public override void Write(byte[] buffer, int offset, int count) + { + _socket.Send(buffer, offset, count, SocketFlags.None); + } + + public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state) + { + return _socket.BeginSend(buffer, offset, count, SocketFlags.None, callback, state); + } + + public override void EndWrite(IAsyncResult asyncResult) + { + _socket.EndSend(asyncResult); + } + + public override void SetLength(long value) + { + throw new NotImplementedException(); + } + + public override long Seek(long offset, SeekOrigin origin) + { + throw new NotImplementedException(); + } + + public override int Read(byte[] buffer, int offset, int count) + { + return _socket.Receive(buffer, offset, count, SocketFlags.None); + } + + public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state) + { + return _socket.BeginReceive(buffer, offset, count, SocketFlags.None, callback, state); + } + + public override int EndRead(IAsyncResult asyncResult) + { + return _socket.EndReceive(asyncResult); + } + } + +} |