public void Dispose()
{
if (Pointer == IntPtr.Zero)
{
return;
}
try { StopServiceThread(); } catch { }
if (Compressor != null)
{
Compressor.Dispose();
Compressor = null;
}
if (Checksum != null)
{
Checksum.Dispose();
Checksum = null;
}
if (Interceptor != null)
{
Interceptor.Dispose();
Interceptor = null;
}
m_Peers.ForEach(p => p.FreeHandle());
LibENet.HostDestroy(Pointer);
Pointer = IntPtr.Zero;
}
public static void Startup(ENetAllocator allocator = null)
{
if (Started)
{
return;
}
Started = true;
Allocator = (allocator == null) ? new ENetManagedAllocator() : allocator;
LibENet.Load();
Native.ENetCallbacks callbacks = new Native.ENetCallbacks();
callbacks.Malloc = Marshal.GetFunctionPointerForDelegate(MemAllocDelegate);
callbacks.Free = Marshal.GetFunctionPointerForDelegate(MemFreeDelegate);
callbacks.NoMemory = Marshal.GetFunctionPointerForDelegate(NoMemoryDelegate);
var linkedVer = LibENet.LinkedVersion();
if (LibENet.InitializeWithCallbacks(linkedVer, &callbacks) != 0)
{
throw new Exception("ENet library initialization failed.");
}
LinkedVersion = new Version((int)(((linkedVer) >> 16) & 0xFF),
(int)(((linkedVer) >> 8) & 0xFF),
(int)((linkedVer) & 0xFF));
}
/// <summary>
/// Instantiates <see cref="ENetHost"/> by creating native ENet host
/// </summary>
/// <param name="address">The address at which other peers may connect to this host. If null, then no peers may connect to the host.</param>
/// <param name="peers">Maximum number of peers</param>
/// <param name="channels">Maximum number of channels (0 = <see cref="MaximumPeers"/>)</param>
/// <param name="incomingBandwidth">Maximum incoming bandwidth (0 = unlimited)</param>
/// <param name="outgoingBandwidth">Maximum outgoing bandwidth (0 = unlimited)</param>
public ENetHost(IPEndPoint?address, int peers, byte channels, long incomingBandwidth = 0, long outgoingBandwidth = 0)
{
if (incomingBandwidth < uint.MinValue || incomingBandwidth > uint.MaxValue)
{
throw new ArgumentOutOfRangeException(nameof(incomingBandwidth));
}
if (outgoingBandwidth < uint.MinValue || outgoingBandwidth > uint.MaxValue)
{
throw new ArgumentOutOfRangeException(nameof(outgoingBandwidth));
}
if (peers < 0 || peers > MaximumPeers)
{
throw new ArgumentOutOfRangeException(nameof(peers));
}
var nativeAddress = NativeENetAddress.FromIPEndPoint(address ?? new IPEndPoint(IPAddress.Any, 0));
m_Pointer = LibENet.HostCreate(&nativeAddress, (UIntPtr)peers, (UIntPtr)channels, (uint)incomingBandwidth, (uint)outgoingBandwidth);
if (m_Pointer == IntPtr.Zero)
{
ThrowHelper.ThrowENetCreateHostFailed();
}
public ENetPacket(Span <byte> data, ENetPacketFlags flags)
{
fixed(byte *p = data)
{
m_Native = LibENet.PacketCreate(new IntPtr(p), unchecked ((UIntPtr)data.Length), flags);
}
}
public void DoNotCompress()
{
CheckDispose();
LibENet.HostCompress(Pointer, (Native.ENetCompressor *)IntPtr.Zero);
Compressor = null;
}
public ENetPacket(int dataLength, ENetPacketFlags flags)
{
if (dataLength < 0)
{
throw new ArgumentOutOfRangeException(nameof(dataLength));
}
m_Native = LibENet.PacketCreate(IntPtr.Zero, unchecked ((UIntPtr)dataLength), flags);
}
/// <summary>
/// Initializes ENet with given startup options.
/// </summary>
/// <param name="startupOptions">The startup options.</param>
public static void Startup(ENetStartupOptions startupOptions)
{
ThrowHelper.ThrowIfArgumentNull(startupOptions, nameof(startupOptions));
startupOptions.CheckValues();
var allocator = startupOptions.Allocator;
if (Started)
{
return;
}
Started = true;
if (startupOptions.ModulePath != null)
{
LibENet.Load(startupOptions.ModulePath);
}
else if (startupOptions.ModuleHandle != IntPtr.Zero)
{
LibENet.Load(startupOptions.ModuleHandle);
}
else
{
// load from native dependencies.
LibENet.Load();
}
var linkedVer = LibENet.LinkedVersion();
s_LinkedVersion = new Version((int)(((linkedVer) >> 16) & 0xFF),
(int)(((linkedVer) >> 8) & 0xFF),
(int)((linkedVer) & 0xFF));
if (allocator == null)
{
if (LibENet.Initialize() != 0)
{
ThrowHelper.ThrowENetInitializationFailed();
}
}
else
{
s_Allocator = allocator;
NativeENetCallbacks callbacks = new NativeENetCallbacks
{
Malloc = Marshal.GetFunctionPointerForDelegate(s_MemAllocDelegate),
Free = Marshal.GetFunctionPointerForDelegate(s_MemFreeDelegate),
NoMemory = Marshal.GetFunctionPointerForDelegate(s_NoMemoryDelegate)
};
if (LibENet.InitializeWithCallbacks(linkedVer, &callbacks) != 0)
{
ThrowHelper.ThrowENetInitializationFailed();
}
}
}
public ENetEvent CheckEvents()
{
CheckDispose();
var native = new Native.ENetEvent();
LibENet.HostCheckEvents(Pointer, &native);
return(NativeToManagedEvent(ref native));
}
public void CompressWithRangeCoder()
{
CheckDispose();
if (LibENet.HostCompressWithRangeCoder(Pointer) != 0)
{
throw new Exception("Failed to set compressor to RangeCoder.");
}
Compressor = null;
}
// id must be in sync with interop_helpers.c
static int getOffset(uint id)
{
var offset = LibENet.InteropHelperSizeOrOffset(id);
if (offset == new IntPtr(-1))
{
throw new ENetException("Size-or-Offset identifier mismatch.");
}
return(offset.ToInt32());
}
public void Broadcast(byte[] buffer, byte channel, ENetPacketFlags flags)
{
CheckDispose();
Native.ENetPacket *packet;
fixed(byte *p = buffer)
{
packet = LibENet.PacketCreate((IntPtr)p, (UIntPtr)buffer.Length, flags & ~ENetPacketFlags.NoAllocate);
}
LibENet.HostBroadcast(Pointer, channel, packet);
}
public void ChecksumWithCRC32()
{
CheckDispose();
if (Checksum != null)
{
Checksum.Dispose();
Checksum = null;
}
*m_pChecksumCallback = LibENet.GetProc("enet_crc32");
}
/// <summary>
/// Queues a packet to be sent.
/// </summary>
/// <param name="channelId">Destination channel Id</param>
/// <param name="packet">Packet to be queued</param>
/// <remarks>
/// This method will destroy the packet if its <see cref="ENetPacket.ReferenceCount"/> is zero
/// </remarks>
public void Send(byte channelId, ENetPacket packet)
{
ThrowIfNull();
if (packet.IsNull)
{
throw new ArgumentNullException(nameof(packet));
}
if (LibENet.PeerSend(m_Native, channelId, packet.GetNativePointer()) < 0)
{
ThrowHelper.ThrowENetPeerSendFailed();
}
}
/// <summary>
/// Resizes packet data length
/// </summary>
/// <param name="dataLength">New data length</param>
/// <remarks>
/// <see cref="Data"/> becomes invalid after calling this method.
/// </remarks>
public void Resize(int dataLength)
{
if (dataLength < 0)
{
throw new ArgumentOutOfRangeException(nameof(dataLength));
}
ThrowIfNull();
if (LibENet.PacketResize(m_Native, unchecked ((UIntPtr)dataLength)) < 0)
{
ThrowHelper.ThrowENetPacketResizeFailed();
}
}
public void Send(byte[] buffer, byte channel, ENetPacketFlags flags)
{
Native.ENetPacket *packet;
fixed(byte *p = buffer)
{
packet = LibENet.PacketCreate((IntPtr)p, (UIntPtr)buffer.Length, flags & ~ENetPacketFlags.NoAllocate);
}
if (LibENet.PeerSend(Unsafe, channel, packet) < 0)
{
throw new Exception("Failed to send packet to peer.");
}
}
private ENetEvent NativeToManagedEvent(ref Native.ENetEvent native)
{
switch (native.Type)
{
case ENetEventType.None:
return(null);
case ENetEventType.Connect:
var connect = new ENetConnectEventArgs();
if (native.Peer->Data == IntPtr.Zero)
{
connect.Peer = new ENetPeer(this, native.Peer);
}
else
{
connect.Peer = ENetPeer.FromPtr(native.Peer->Data);
}
connect.Peer.RemoteEndPoint = native.Peer->Address.ToEndPoint();
connect.Data = native.Data;
return(connect);
case ENetEventType.Disconnect:
if (native.Peer->Data == IntPtr.Zero)
{
throw new NullReferenceException("Peer->Data");
}
var disconnect = new ENetDisconnectEventArgs();
disconnect.Peer = ENetPeer.FromPtr(native.Peer->Data);
disconnect.Data = native.Data;
disconnect.Peer.FreeHandle();
return(disconnect);
case ENetEventType.Receive:
if (native.Peer->Data == IntPtr.Zero)
{
throw new NullReferenceException("Peer->Data");
}
var receive = new ENetReceiveEventArgs();
receive.Peer = ENetPeer.FromPtr(native.Peer->Data);
receive.Packet = new ENetPacket(native.Packet, native.ChannelID);
LibENet.PacketDestroy(native.Packet);
return(receive);
default:
throw new NotImplementedException(native.Type.ToString());
}
}
public bool Receive(out ENetPacket packet)
{
byte channel = 0;
Native.ENetPacket *native = LibENet.PeerReceive(Unsafe, &channel);
if (((IntPtr)native) == IntPtr.Zero)
{
packet = null;
return(false);
}
packet = new ENetPacket(native, channel);
LibENet.PacketDestroy(native);
return(true);
}
public void BandwidthLimit(long incomingBandwidth, long outgoingBandwidth)
{
CheckDispose();
if (incomingBandwidth < uint.MinValue || incomingBandwidth > uint.MaxValue)
{
throw new ArgumentOutOfRangeException("incomingBandwidth");
}
if (outgoingBandwidth < uint.MinValue || outgoingBandwidth > uint.MaxValue)
{
throw new ArgumentOutOfRangeException("outgoingBandwidth");
}
LibENet.HostBandwidthLimit(Pointer, (uint)incomingBandwidth, (uint)outgoingBandwidth);
}
/// <summary>
/// Queues a packet to be sent.
/// </summary>
/// <param name="channelId">Destination channel Id</param>
/// <param name="buffer">Buffer containing packet data</param>
/// <param name="flags">Packet flags</param>
/// <remarks>
/// <see cref="ENetPacketFlags.NoAllocate"/> will be ignored.
/// </remarks>
public void Send(byte channelId, ReadOnlySpan <byte> buffer, ENetPacketFlags flags)
{
ThrowIfNull();
NativeENetPacket *packet;
fixed(byte *p = buffer)
{
packet = LibENet.PacketCreate((IntPtr)p, unchecked ((UIntPtr)buffer.Length), flags & ~ENetPacketFlags.NoAllocate);
}
if (LibENet.PeerSend(m_Native, channelId, packet) < 0)
{
ThrowHelper.ThrowENetPeerSendFailed();
}
}
/// <summary>
/// Shutdowns and unloads ENet's library
/// </summary>
/// <param name="delete">Specifies whether the ENet dynamic library should be removed or not from disk.</param>
/// <remarks>
/// Any interaction with ENet managed wrapper instances like <see cref="ENetHost"/> should be avoided
/// after calling this method. <br/>
/// Parameter <paramref name="delete"/> is only considered when the library is loaded from the resources.
/// </remarks>
public static void Shutdown(bool delete = true)
{
if (!Started)
{
return;
}
Started = false;
LibENet.Unload();
if (delete)
{
LibENet.TryDelete();
}
s_Allocator?.Dispose();
s_Allocator = null;
}
public void CompressWith(ENetCompressor compressor)
{
CheckDispose();
if (compressor.Host != null && compressor.Host != this)
{
throw new Exception("Compressor is already in use by another host.");
}
compressor.Host = this;
Native.ENetCompressor native = new Native.ENetCompressor();
native.Context = compressor.AllocHandle();
native.Compress = Marshal.GetFunctionPointerForDelegate(ENetCompressor.CompressDelegate);
native.Decompress = Marshal.GetFunctionPointerForDelegate(ENetCompressor.DecompressDelegate);
native.Destroy = Marshal.GetFunctionPointerForDelegate(ENetCompressor.DestroyDelegate);
LibENet.HostCompress(Pointer, &native);
Compressor = compressor;
}
public ENetPeer Connect(IPEndPoint endPoint, byte channels, uint data)
{
CheckDispose();
if (channels < 1)
{
throw new ArgumentOutOfRangeException("channels");
}
Native.ENetAddress address = Native.ENetAddress.FromEndPoint(endPoint);
var native = LibENet.HostConnect(Pointer, &address, (UIntPtr)channels, data);
if (((IntPtr)native) == IntPtr.Zero)
{
throw new Exception("Failed to initiate connection.");
}
return(new ENetPeer(this, native));
}
public void Multicast(byte[] buffer, byte channel, ENetPacketFlags flags, IEnumerable <ENetPeer> peers, ENetPeer except)
{
CheckDispose();
Native.ENetPacket *packet;
fixed(byte *p = buffer)
{
packet = LibENet.PacketCreate((IntPtr)p, (UIntPtr)buffer.Length, flags & ~ENetPacketFlags.NoAllocate);
}
foreach (var peer in peers)
{
if (peer == null)
{
throw new NullReferenceException();
}
if (peer.Host != this)
{
throw new ENetMulticastException("Speicfied peer is not of this host.", peer);
}
if (peer == except)
{
continue;
}
if (peer.Unsafe->State != ENetPeerState.Connected)
{
continue;
}
if (LibENet.PeerSend(peer.Unsafe, channel, packet) != 0)
{
throw new ENetMulticastException("Failed to send packet to speicfied peer.", peer);
}
}
if (packet->ReferenceCount.ToUInt32() == 0)
{
LibENet.PacketDestroy(packet);
}
}
/// <summary>
/// Attempts to dequeue any incoming queued packet.
/// </summary>
/// <param name="packet">Received packet if return value is true</param>
/// <param name="channelId">Receiver channel if return value is true</param>
/// <returns>Return true if packet received otherwise false</returns>
public bool TryReceive(out ENetPacket packet, out byte channelId)
{
ThrowIfNull();
byte chnl = 0;
var resultPacket = LibENet.PeerReceive(m_Native, &chnl);
if (resultPacket == null)
{
channelId = 0;
packet = default;
return(false);
}
else
{
channelId = chnl;
packet = new ENetPacket(resultPacket);
return(true);
}
}
public ENetHost(IPEndPoint address, int peers, byte channels, long incomingBandwidth, long outgoingBandwidth)
{
if (incomingBandwidth < uint.MinValue || incomingBandwidth > uint.MaxValue)
{
throw new ArgumentOutOfRangeException("incomingBandwidth");
}
if (outgoingBandwidth < uint.MinValue || outgoingBandwidth > uint.MaxValue)
{
throw new ArgumentOutOfRangeException("outgoingBandwidth");
}
if (peers < uint.MinValue || peers > LibENet.ENET_PROTOCOL_MAXIMUM_PEER_ID)
{
throw new ArgumentOutOfRangeException(string.Format("Maximum peers count is {0}", LibENet.ENET_PROTOCOL_MAXIMUM_PEER_ID));
}
var enetAddress = Native.ENetAddress.FromEndPoint(address);
Pointer = LibENet.HostCreate(&enetAddress, (UIntPtr)peers, (UIntPtr)channels, (uint)incomingBandwidth, (uint)outgoingBandwidth);
if (Pointer == IntPtr.Zero)
{
throw new Exception("Failed to create ENet host.");
}
m_pInterceptCallback = (IntPtr *)IntPtr.Add(Pointer, Native.ENetHostOffset.InterceptOffset);
m_pChecksumCallback = (IntPtr *)IntPtr.Add(Pointer, Native.ENetHostOffset.ChecksumOffset);
m_pTotalSentData = (uint *)IntPtr.Add(Pointer, Native.ENetHostOffset.TotalSentDataOffset);
m_pTotalSentPackets = (uint *)IntPtr.Add(Pointer, Native.ENetHostOffset.TotalSentPacketsOffset);
m_pTotalReceivedData = (uint *)IntPtr.Add(Pointer, Native.ENetHostOffset.TotalReceivedDataOffset);
m_pTotalReceivedPackets = (uint *)IntPtr.Add(Pointer, Native.ENetHostOffset.TotalReceivedPacketsOffset);
m_pReceivedAddress = (Native.ENetAddress *)IntPtr.Add(Pointer, Native.ENetHostOffset.ReceivedAddressOffset);
m_pReceivedData = (IntPtr *)IntPtr.Add(Pointer, Native.ENetHostOffset.ReceivedDataOffset);
m_pReceivedDataLength = (UIntPtr *)IntPtr.Add(Pointer, Native.ENetHostOffset.ReceivedDataLengthOffset);
m_pConnectedPeers = (UIntPtr *)IntPtr.Add(Pointer, Native.ENetHostOffset.ConnectedPeersOffset);
ChecksumDelegate = new Native.ENetChecksumCallback(ChecksumCallback);
m_InterceptDelegate = new Native.ENetInterceptCallback(InterceptCallback);
}
public bool Service(out ENetEvent e, uint timeout)
{
CheckDispose();
var native = new Native.ENetEvent();
int result;
result = LibENet.HostService(Pointer, &native, timeout);
if (result < 0)
{
throw new Exception("Service failure.");
}
if (result == 0)
{
e = new ENetNoneEventArgs();
}
else
{
e = NativeToManagedEvent(ref native);
}
return(true);
}
/// <summary>
/// Destroys packet without considering references count
/// </summary>
public void Destroy()
{
ThrowIfNull();
LibENet.PacketDestroy(m_Native);
}
public void Timeout(uint timeoutLimit, uint timeoutMinimum, uint timeoutMaximum) => LibENet.PeerTimeout(Unsafe, timeoutLimit, timeoutMinimum, timeoutMaximum);
public void ThrottleConfigure(uint interval, uint acceleration, uint deceleration) => LibENet.PeerThrottleConfigure(Unsafe, interval, acceleration, deceleration);
public void PingInterval(uint pingInterval) => LibENet.PeerPingInterval(Unsafe, pingInterval);
