From a31646a2ec9285cea9b5fdf90870bc57c4ef46a0 Mon Sep 17 00:00:00 2001 From: ALEXTANG <574809918@qq.com> Date: Sat, 22 Apr 2023 00:44:10 +0800 Subject: [PATCH] =?UTF-8?q?[+]=20=E5=9F=BA=E4=BA=8EUniTask=E7=9A=84Kcp?= =?UTF-8?q?=E5=AE=9E=E7=8E=B0?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [+] 基于UniTask的Kcp实现 --- Assets/TEngine/Libraries/System.meta | 8 + .../Libraries/System/System.Buffers.dll | Bin 0 -> 28304 bytes .../Libraries/System/System.Buffers.dll.meta | 33 + .../Libraries/System/System.Buffers.xml | 38 + .../Libraries/System/System.Buffers.xml.meta | 7 + .../Libraries/System/System.Memory.dll | Bin 0 -> 148720 bytes .../Libraries/System/System.Memory.dll.meta | 33 + .../Libraries/System/System.Memory.xml | 355 +++ .../Libraries/System/System.Memory.xml.meta | 7 + ...System.Runtime.CompilerServices.Unsafe.dll | Bin 0 -> 23600 bytes ...m.Runtime.CompilerServices.Unsafe.dll.meta | 33 + ...System.Runtime.CompilerServices.Unsafe.xml | 200 ++ ...m.Runtime.CompilerServices.Unsafe.xml.meta | 7 + .../GameFramework/Network/Kcp/Core.meta | 8 + .../Network/Kcp/Core/FakeKcpIO.cs | 71 + .../Network/Kcp/Core/FakeKcpIO.cs.meta | 11 + .../Network/Kcp/Core/IKcpInterface.cs | 147 ++ .../Network/Kcp/Core/IKcpInterface.cs.meta | 11 + .../Network/Kcp/Core/IKcpSegment.cs | 88 + .../Network/Kcp/Core/IKcpSegment.cs.meta | 11 + .../GameFramework/Network/Kcp/Core/Kcp.cs | 387 +++ .../Network/Kcp/Core/Kcp.cs.meta | 11 + .../GameFramework/Network/Kcp/Core/KcpCore.cs | 2207 +++++++++++++++++ .../Network/Kcp/Core/KcpCore.cs.meta | 11 + .../GameFramework/Network/Kcp/Core/KcpIO.cs | 262 ++ .../Network/Kcp/Core/KcpIO.cs.meta | 11 + .../Network/Kcp/Core/KcpOutputWriter.cs | 50 + .../Network/Kcp/Core/KcpOutputWriter.cs.meta | 11 + .../Network/Kcp/Core/KcpSegment.cs | 402 +++ .../Network/Kcp/Core/KcpSegment.cs.meta | 11 + .../Network/Kcp/Core/KcpTrace.cs | 79 + .../Network/Kcp/Core/KcpTrace.cs.meta | 11 + .../Network/Kcp/Core/SegManager.cs | 265 ++ .../Network/Kcp/Core/SegManager.cs.meta | 11 + .../Network/Kcp/Core/SimpleKcpClient.cs | 65 + .../Network/Kcp/Core/SimpleKcpClient.cs.meta | 11 + .../Network/Kcp/Core/SimpleKcpServer.cs | 48 + .../Network/Kcp/Core/SimpleKcpServer.cs.meta | 3 + .../GameFramework/Network/Kcp/Core/Utility.cs | 73 + .../Network/Kcp/Core/Utility.cs.meta | 11 + 40 files changed, 5008 insertions(+) create mode 100644 Assets/TEngine/Libraries/System.meta create mode 100644 Assets/TEngine/Libraries/System/System.Buffers.dll create mode 100644 Assets/TEngine/Libraries/System/System.Buffers.dll.meta create mode 100644 Assets/TEngine/Libraries/System/System.Buffers.xml create mode 100644 Assets/TEngine/Libraries/System/System.Buffers.xml.meta create mode 100644 Assets/TEngine/Libraries/System/System.Memory.dll create mode 100644 Assets/TEngine/Libraries/System/System.Memory.dll.meta create mode 100644 Assets/TEngine/Libraries/System/System.Memory.xml create mode 100644 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Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpSegment.cs.meta create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs.meta create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs.meta create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs.meta create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs.meta create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs create mode 100644 Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs.meta create mode 100644 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Provides a resource pool that enables reusing instances of type . + The type of the objects that are in the resource pool. + + + Initializes a new instance of the class. + + + Creates a new instance of the class. + A new instance of the class. + + + Creates a new instance of the class using the specifed configuration. + The maximum length of an array instance that may be stored in the pool. + The maximum number of array instances that may be stored in each bucket in the pool. 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+ second: + enabled: 0 + settings: + DefaultValueInitialized: true + - first: + Windows Store Apps: WindowsStoreApps + second: + enabled: 0 + settings: + CPU: AnyCPU + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Libraries/System/System.Runtime.CompilerServices.Unsafe.xml b/Assets/TEngine/Libraries/System/System.Runtime.CompilerServices.Unsafe.xml new file mode 100644 index 00000000..6a7cfcff --- /dev/null +++ b/Assets/TEngine/Libraries/System/System.Runtime.CompilerServices.Unsafe.xml @@ -0,0 +1,200 @@ + + + System.Runtime.CompilerServices.Unsafe + + + + Contains generic, low-level functionality for manipulating pointers. + + + Adds an element offset to the given reference. + The reference to add the offset to. + The offset to add. + The type of reference. + A new reference that reflects the addition of offset to pointer. + + + Adds an element offset to the given reference. + The reference to add the offset to. + The offset to add. + The type of reference. + A new reference that reflects the addition of offset to pointer. + + + Adds a byte offset to the given reference. + The reference to add the offset to. + The offset to add. + The type of reference. + A new reference that reflects the addition of byte offset to pointer. + + + Determines whether the specified references point to the same location. + The first reference to compare. + The second reference to compare. + The type of reference. + true if left and right point to the same location; otherwise, false. + + + Casts the given object to the specified type. + The object to cast. + The type which the object will be cast to. + The original object, casted to the given type. + + + Reinterprets the given reference as a reference to a value of type TTo. + The reference to reinterpret. + The type of reference to reinterpret.. + The desired type of the reference. + A reference to a value of type TTo. + + + Returns a pointer to the given by-ref parameter. + The object whose pointer is obtained. + The type of object. + A pointer to the given value. + + + Reinterprets the given location as a reference to a value of type T. + The location of the value to reference. + The type of the interpreted location. + A reference to a value of type T. + + + Determines the byte offset from origin to target from the given references. + The reference to origin. + The reference to target. + The type of reference. + Byte offset from origin to target i.e. target - origin. + + + Copies a value of type T to the given location. + The location to copy to. + A reference to the value to copy. + The type of value to copy. + + + Copies a value of type T to the given location. + The location to copy to. + A pointer to the value to copy. + The type of value to copy. + + + Copies bytes from the source address to the destination address. + The destination address to copy to. + The source address to copy from. + The number of bytes to copy. + + + Copies bytes from the source address to the destination address. + The destination address to copy to. + The source address to copy from. + The number of bytes to copy. + + + Copies bytes from the source address to the destination address +without assuming architecture dependent alignment of the addresses. + The destination address to copy to. + The source address to copy from. + The number of bytes to copy. + + + Copies bytes from the source address to the destination address +without assuming architecture dependent alignment of the addresses. + The destination address to copy to. + The source address to copy from. + The number of bytes to copy. + + + Initializes a block of memory at the given location with a given initial value. + The address of the start of the memory block to initialize. + The value to initialize the block to. + The number of bytes to initialize. + + + Initializes a block of memory at the given location with a given initial value. + The address of the start of the memory block to initialize. + The value to initialize the block to. + The number of bytes to initialize. + + + Initializes a block of memory at the given location with a given initial value +without assuming architecture dependent alignment of the address. + The address of the start of the memory block to initialize. + The value to initialize the block to. + The number of bytes to initialize. + + + Initializes a block of memory at the given location with a given initial value +without assuming architecture dependent alignment of the address. + The address of the start of the memory block to initialize. + The value to initialize the block to. + The number of bytes to initialize. + + + Reads a value of type T from the given location. + The location to read from. + The type to read. + An object of type T read from the given location. + + + Reads a value of type T from the given location +without assuming architecture dependent alignment of the addresses. + The location to read from. + The type to read. + An object of type T read from the given location. + + + Reads a value of type T from the given location +without assuming architecture dependent alignment of the addresses. + The location to read from. + The type to read. + An object of type T read from the given location. + + + Returns the size of an object of the given type parameter. + The type of object whose size is retrieved. + The size of an object of type T. + + + Subtracts an element offset from the given reference. + The reference to subtract the offset from. + The offset to subtract. + The type of reference. + A new reference that reflects the subraction of offset from pointer. + + + Subtracts an element offset from the given reference. + The reference to subtract the offset from. + The offset to subtract. + The type of reference. + A new reference that reflects the subraction of offset from pointer. + + + Subtracts a byte offset from the given reference. + The reference to subtract the offset from. + + The type of reference. + A new reference that reflects the subraction of byte offset from pointer. + + + Writes a value of type T to the given location. + The location to write to. + The value to write. + The type of value to write. + + + Writes a value of type T to the given location +without assuming architecture dependent alignment of the addresses. + The location to write to. + The value to write. + The type of value to write. + + + Writes a value of type T to the given location +without assuming architecture dependent alignment of the addresses. + The location to write to. + The value to write. + The type of value to write. + + + \ No newline at end of file diff --git a/Assets/TEngine/Libraries/System/System.Runtime.CompilerServices.Unsafe.xml.meta b/Assets/TEngine/Libraries/System/System.Runtime.CompilerServices.Unsafe.xml.meta new file mode 100644 index 00000000..5d6e891b --- /dev/null +++ b/Assets/TEngine/Libraries/System/System.Runtime.CompilerServices.Unsafe.xml.meta @@ -0,0 +1,7 @@ +fileFormatVersion: 2 +guid: 3b7641a560428bd45aa6bbd10d8bb4ab +TextScriptImporter: + externalObjects: {} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core.meta new file mode 100644 index 00000000..b91893dc --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core.meta @@ -0,0 +1,8 @@ +fileFormatVersion: 2 +guid: 6dff8f4f5dd94df49bf6d616fb11cc9c +folderAsset: yes +DefaultImporter: + externalObjects: {} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/FakeKcpIO.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/FakeKcpIO.cs new file mode 100644 index 00000000..200b30e3 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/FakeKcpIO.cs @@ -0,0 +1,71 @@ +using System.Buffers; +using Cysharp.Threading.Tasks; + +namespace System.Net.Sockets.Kcp +{ + /// + /// 用于调试的KCP IO 类，没有Kcp功能 + /// + public class FakeKcpIO : IKcpIO + { + QueuePipe recv = new QueuePipe(); + public int Input(ReadOnlySpan span) + { + byte[] buffer = new byte[span.Length]; + span.CopyTo(buffer); + recv.Write(buffer); + return 0; + } + + public int Input(ReadOnlySequence span) + { + byte[] buffer = new byte[span.Length]; + span.CopyTo(buffer); + return Input(buffer); + } + + public async UniTask RecvAsync(IBufferWriter writer, object options = null) + { + var buffer = await recv.ReadAsync().ConfigureAwait(false); + var target = writer.GetMemory(buffer.Length); + buffer.AsSpan().CopyTo(target.Span); + writer.Advance(buffer.Length); + } + + public async UniTask RecvAsync(ArraySegment buffer, object options = null) + { + var temp = await recv.ReadAsync().ConfigureAwait(false); + temp.AsSpan().CopyTo(buffer); + return temp.Length; + } + + QueuePipe send = new QueuePipe(); + public int Send(ReadOnlySpan span, object options = null) + { + byte[] buffer = new byte[span.Length]; + span.CopyTo(buffer); + send.Write(buffer); + return 0; + } + + public int Send(ReadOnlySequence span, object options = null) + { + byte[] buffer = new byte[span.Length]; + span.CopyTo(buffer); + return Send(buffer); + } + + public async UniTask OutputAsync(IBufferWriter writer, object options = null) + { + var buffer = await send.ReadAsync().ConfigureAwait(false); + Write(writer, buffer); + } + + private static void Write(IBufferWriter writer, byte[] buffer) + { + var span = writer.GetSpan(buffer.Length); + buffer.AsSpan().CopyTo(span); + writer.Advance(buffer.Length); + } + } +} diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/FakeKcpIO.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/FakeKcpIO.cs.meta new file mode 100644 index 00000000..3f00b35d --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/FakeKcpIO.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: e3c2f9de3c34ffc409549b86ac3fc530 +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpInterface.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpInterface.cs new file mode 100644 index 00000000..72bfb079 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpInterface.cs @@ -0,0 +1,147 @@ +using BufferOwner = System.Buffers.IMemoryOwner; +using System.Buffers; +using Cysharp.Threading.Tasks; + +namespace System.Net.Sockets.Kcp +{ + /// + /// Kcp回调 + /// + public interface IKcpCallback + { + /// + /// kcp 发送方向输出 + /// + /// kcp 交出发送缓冲区控制权，缓冲区来自 + /// 数据的有效长度 + /// 不需要返回值 + /// 通过增加 avalidLength 能够在协议栈中有效的减少数据拷贝 + void Output(BufferOwner buffer, int avalidLength); + } + + /// + /// Kcp回调 + /// + /// + /// 失败设计，。IMemoryOwner是没有办法代替的。 + /// 这里只相当于把 IKcpCallback 和 IRentable 和并。 + /// + public interface IKcpOutputWriter : IBufferWriter + { + int UnflushedBytes { get; } + void Flush(); + } + + /// + /// 外部提供缓冲区,可以在外部链接一个内存池 + /// + public interface IRentable + { + /// + /// 外部提供缓冲区,可以在外部链接一个内存池 + /// + BufferOwner RentBuffer(int length); + } + + public interface IKcpSetting + { + int Interval(int interval); + /// + /// fastest: ikcp_nodelay(kcp, 1, 20, 2, 1) + /// + /// 0:disable(default), 1:enable + /// internal update timer interval in millisec, default is 100ms + /// 0:disable fast resend(default), 1:enable fast resend + /// 0:normal congestion control(default), 1:disable congestion control + /// + int NoDelay(int nodelay, int interval, int resend, int nc); + /// + /// change MTU size, default is 1400 + /// ** 这个方法不是线程安全的。请在没有发送和接收时调用 。 + /// + /// + /// + /// + /// 如果没有必要，不要修改Mtu。过小的Mtu会导致分片数大于接收窗口，造成kcp阻塞冻结。 + /// + int SetMtu(int mtu = 1400); + /// + /// set maximum window size: sndwnd=32, rcvwnd=128 by default + /// + /// + /// + /// + /// + /// 如果没有必要请不要修改。注意确保接收窗口必须大于最大分片数。 + /// + int WndSize(int sndwnd = 32, int rcvwnd = 128); + } + + public interface IKcpUpdate + { + void Update(in DateTimeOffset time); + } + + public interface IKcpSendable + { + /// + /// 将要发送到网络的数据Send到kcp协议中 + /// + /// + /// + int Send(ReadOnlySpan span, object options = null); + /// + /// 将要发送到网络的数据Send到kcp协议中 + /// + /// + /// + int Send(ReadOnlySequence span, object options = null); + } + + public interface IKcpInputable + { + /// + /// 下层收到数据后添加到kcp协议中 + /// + /// + int Input(ReadOnlySpan span); + /// + /// 下层收到数据后添加到kcp协议中 + /// + /// + int Input(ReadOnlySequence span); + } + + /// + /// kcp协议输入输出标准接口 + /// + public interface IKcpIO : IKcpSendable, IKcpInputable + { + /// + /// 从kcp中取出一个整合完毕的数据包 + /// + /// + UniTask RecvAsync(IBufferWriter writer, object options = null); + + /// + /// 从kcp中取出一个整合完毕的数据包 + /// + /// + /// + /// 接收数据长度 + UniTask RecvAsync(ArraySegment buffer, object options = null); + + /// + /// 从kcp协议中取出需要发送到网络的数据。 + /// + /// + /// + /// + UniTask OutputAsync(IBufferWriter writer, object options = null); + } + +} + + + + diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpInterface.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpInterface.cs.meta new file mode 100644 index 00000000..6fa4a162 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpInterface.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: b0ca98e42147b3948bc8d30f24e9c366 +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpSegment.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpSegment.cs new file mode 100644 index 00000000..8308bf7d --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpSegment.cs @@ -0,0 +1,88 @@ +namespace System.Net.Sockets.Kcp +{ + /// + /// Kcp报头 + /// https://zhuanlan.zhihu.com/p/559191428 + /// + public interface IKcpHeader + { + /// + /// 会话编号，两方一致才会通信 + /// + uint conv { get; set; } + /// + /// 指令类型 + /// + /// + /// IKCP_CMD_PUSH = 81 // cmd: push data 数据报文 + /// IKCP_CMD_ACK = 82 // cmd: ack 确认报文 + /// IKCP_CMD_WASK = 83 // cmd: window probe (ask) 窗口探测报文,询问对端剩余接收窗口的大小. + /// IKCP_CMD_WINS = 84 // cmd: window size (tell) 窗口通知报文,通知对端剩余接收窗口的大小. + /// + byte cmd { get; set; } + /// + /// 剩余分片数量，表示随后还有多少个报文属于同一个包。 + /// + byte frg { get; set; } + /// + /// 自己可用窗口大小 + /// + ushort wnd { get; set; } + /// + /// 发送时的时间戳 + /// + uint ts { get; set; } + /// + /// 编号 确认编号或者报文编号 + /// + uint sn { get; set; } + /// + /// 代表编号前面的所有报都收到了的标志 + /// + uint una { get; set; } + /// + /// 数据内容长度 + /// + uint len { get; } + } + public interface IKcpSegment : IKcpHeader + { + /// + /// 重传的时间戳。超过当前时间重发这个包 + /// + uint resendts { get; set; } + /// + /// 超时重传时间，根据网络去定 + /// + uint rto { get; set; } + /// + /// 快速重传机制，记录被跳过的次数，超过次数进行快速重传 + /// + uint fastack { get; set; } + /// + /// 重传次数 + /// + uint xmit { get; set; } + + /// + /// 数据内容 + /// + Span data { get; } + /// + /// 将IKcpSegment编码成字节数组，并返回总长度（包括Kcp报头） + /// + /// + /// + int Encode(Span buffer); + } + + public interface ISegmentManager where Segment : IKcpSegment + { + Segment Alloc(int appendDateSize); + void Free(Segment seg); + } + +} + + + diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpSegment.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpSegment.cs.meta new file mode 100644 index 00000000..d3c132cd --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/IKcpSegment.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: a9259bb6b548e46459cc766d8fe2faeb +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs new file mode 100644 index 00000000..c0f6b43d --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs @@ -0,0 +1,387 @@ +using System.Buffers; +using BufferOwner = System.Buffers.IMemoryOwner; + +namespace System.Net.Sockets.Kcp +{ + public class Kcp : KcpCore + where Segment : IKcpSegment + { + /// + /// create a new kcp control object, 'conv' must equal in two endpoint + /// from the same connection. + /// + /// + /// + /// 可租用内存的回调 + public Kcp(uint conv_, IKcpCallback callback, IRentable rentable = null) + : base(conv_) + { + callbackHandle = callback; + this.rentable = rentable; + } + + + //extension 重构和新增加的部分============================================ + + IRentable rentable; + /// + /// 如果外部能够提供缓冲区则使用外部缓冲区，否则new byte[] + /// + /// + /// + internal protected override BufferOwner CreateBuffer(int needSize) + { + var res = rentable?.RentBuffer(needSize); + if (res == null) + { + return base.CreateBuffer(needSize); + } + else + { + if (res.Memory.Length < needSize) + { + throw new ArgumentException($"{nameof(rentable.RentBuffer)} 指定的委托不符合标准，返回的" + + $"BufferOwner.Memory.Length 小于 {nameof(needSize)}"); + } + } + + return res; + } + + /// + /// TryRecv Recv设计上同一时刻只允许一个线程调用。 + /// 因为要保证数据顺序，多个线程同时调用Recv也没有意义。 + /// 所以只需要部分加锁即可。 + /// + /// + public (BufferOwner buffer, int avalidLength) TryRecv() + { + var peekSize = -1; + lock (rcv_queueLock) + { + if (rcv_queue.Count == 0) + { + ///没有可用包 + return (null, -1); + } + + var seq = rcv_queue[0]; + + if (seq.frg == 0) + { + peekSize = (int)seq.len; + } + + if (rcv_queue.Count < seq.frg + 1) + { + ///没有足够的包 + return (null, -1); + } + + uint length = 0; + + foreach (var item in rcv_queue) + { + length += item.len; + if (item.frg == 0) + { + break; + } + } + + peekSize = (int)length; + + if (peekSize <= 0) + { + return (null, -2); + } + } + + var buffer = CreateBuffer(peekSize); + var recvlength = UncheckRecv(buffer.Memory.Span); + return (buffer, recvlength); + } + + /// + /// TryRecv Recv设计上同一时刻只允许一个线程调用。 + /// 因为要保证数据顺序，多个线程同时调用Recv也没有意义。 + /// 所以只需要部分加锁即可。 + /// + /// + /// + public int TryRecv(IBufferWriter writer) + { + var peekSize = -1; + lock (rcv_queueLock) + { + if (rcv_queue.Count == 0) + { + ///没有可用包 + return -1; + } + + var seq = rcv_queue[0]; + + if (seq.frg == 0) + { + peekSize = (int)seq.len; + } + + if (rcv_queue.Count < seq.frg + 1) + { + ///没有足够的包 + return -1; + } + + uint length = 0; + + foreach (var item in rcv_queue) + { + length += item.len; + if (item.frg == 0) + { + break; + } + } + + peekSize = (int)length; + + if (peekSize <= 0) + { + return -2; + } + } + + return UncheckRecv(writer); + } + + /// + /// user/upper level recv: returns size, returns below zero for EAGAIN + /// + /// + /// + public int Recv(Span buffer) + { + if (0 == rcv_queue.Count) + { + return -1; + } + + var peekSize = PeekSize(); + if (peekSize < 0) + { + return -2; + } + + if (peekSize > buffer.Length) + { + return -3; + } + + /// 拆分函数 + var recvLength = UncheckRecv(buffer); + + return recvLength; + } + + /// + /// user/upper level recv: returns size, returns below zero for EAGAIN + /// + /// + /// + public int Recv(IBufferWriter writer) + { + if (0 == rcv_queue.Count) + { + return -1; + } + + var peekSize = PeekSize(); + if (peekSize < 0) + { + return -2; + } + + //if (peekSize > buffer.Length) + //{ + // return -3; + //} + + /// 拆分函数 + var recvLength = UncheckRecv(writer); + + return recvLength; + } + + /// + /// 这个函数不检查任何参数 + /// + /// + /// + int UncheckRecv(Span buffer) + { + var recover = false; + if (rcv_queue.Count >= rcv_wnd) + { + recover = true; + } + + #region merge fragment. + /// merge fragment. + + var recvLength = 0; + lock (rcv_queueLock) + { + var count = 0; + foreach (var seg in rcv_queue) + { + seg.data.CopyTo(buffer.Slice(recvLength)); + recvLength += (int)seg.len; + + count++; + int frg = seg.frg; + + SegmentManager.Free(seg); + if (frg == 0) + { + break; + } + } + + if (count > 0) + { + rcv_queue.RemoveRange(0, count); + } + } + + #endregion + + Move_Rcv_buf_2_Rcv_queue(); + + #region fast recover + /// fast recover + if (rcv_queue.Count < rcv_wnd && recover) + { + // ready to send back IKCP_CMD_WINS in ikcp_flush + // tell remote my window size + probe |= IKCP_ASK_TELL; + } + #endregion + return recvLength; + } + + /// + /// 这个函数不检查任何参数 + /// + /// + /// + int UncheckRecv(IBufferWriter writer) + { + var recover = false; + if (rcv_queue.Count >= rcv_wnd) + { + recover = true; + } + + #region merge fragment. + /// merge fragment. + + var recvLength = 0; + lock (rcv_queueLock) + { + var count = 0; + foreach (var seg in rcv_queue) + { + var len = (int)seg.len; + var destination = writer.GetSpan(len); + + seg.data.CopyTo(destination); + writer.Advance(len); + + recvLength += len; + + count++; + int frg = seg.frg; + + SegmentManager.Free(seg); + if (frg == 0) + { + break; + } + } + + if (count > 0) + { + rcv_queue.RemoveRange(0, count); + } + } + + #endregion + + Move_Rcv_buf_2_Rcv_queue(); + + #region fast recover + /// fast recover + if (rcv_queue.Count < rcv_wnd && recover) + { + // ready to send back IKCP_CMD_WINS in ikcp_flush + // tell remote my window size + probe |= IKCP_ASK_TELL; + } + #endregion + return recvLength; + } + + /// + /// check the size of next message in the recv queue + /// + /// + public int PeekSize() + { + lock (rcv_queueLock) + { + if (rcv_queue.Count == 0) + { + ///没有可用包 + return -1; + } + + var seq = rcv_queue[0]; + + if (seq.frg == 0) + { + return (int)seq.len; + } + + if (rcv_queue.Count < seq.frg + 1) + { + ///没有足够的包 + return -1; + } + + uint length = 0; + + foreach (var seg in rcv_queue) + { + length += seg.len; + if (seg.frg == 0) + { + break; + } + } + + return (int)length; + } + } + } +} + + + + + + + + + + diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs.meta new file mode 100644 index 00000000..1dee2c42 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Kcp.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: b3840e90e37f0194bbfafb564ff80d45 +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs new file mode 100644 index 00000000..a7680e0f --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs @@ -0,0 +1,2207 @@ +using System.Buffers; +using System.Buffers.Binary; +using System.Collections.Concurrent; +using System.Collections.Generic; +using System.Diagnostics; +using System.Runtime.CompilerServices; +using static System.Math; +using BufferOwner = System.Buffers.IMemoryOwner; + +namespace System.Net.Sockets.Kcp +{ + public abstract class KcpConst + { + // 为了减少阅读难度，变量名尽量于 C版 统一 + /* + conv 会话ID + mtu 最大传输单元 + mss 最大分片大小 + state 连接状态（0xFFFFFFFF表示断开连接） + snd_una 第一个未确认的包 + snd_nxt 待发送包的序号 + rcv_nxt 待接收消息序号 + ssthresh 拥塞窗口阈值 + rx_rttvar ack接收rtt浮动值 + rx_srtt ack接收rtt静态值 + rx_rto 由ack接收延迟计算出来的复原时间 + rx_minrto 最小复原时间 + snd_wnd 发送窗口大小 + rcv_wnd 接收窗口大小 + rmt_wnd, 远端接收窗口大小 + cwnd, 拥塞窗口大小 + probe 探查变量，IKCP_ASK_TELL表示告知远端窗口大小。IKCP_ASK_SEND表示请求远端告知窗口大小 + interval 内部flush刷新间隔 + ts_flush 下次flush刷新时间戳 + nodelay 是否启动无延迟模式 + updated 是否调用过update函数的标识 + ts_probe, 下次探查窗口的时间戳 + probe_wait 探查窗口需要等待的时间 + dead_link 最大重传次数 + incr 可发送的最大数据量 + fastresend 触发快速重传的重复ack个数 + nocwnd 取消拥塞控制 + stream 是否采用流传输模式 + + snd_queue 发送消息的队列 + rcv_queue 接收消息的队列 + snd_buf 发送消息的缓存 + rcv_buf 接收消息的缓存 + acklist 待发送的ack列表 + buffer 存储消息字节流的内存 + output udp发送消息的回调函数 + */ + + #region Const + + public const int IKCP_RTO_NDL = 30; // no delay min rto + public const int IKCP_RTO_MIN = 100; // normal min rto + public const int IKCP_RTO_DEF = 200; + public const int IKCP_RTO_MAX = 60000; + /// + /// 数据报文 + /// + public const int IKCP_CMD_PUSH = 81; // cmd: push data + /// + /// 确认报文 + /// + public const int IKCP_CMD_ACK = 82; // cmd: ack + /// + /// 窗口探测报文,询问对端剩余接收窗口的大小. + /// + public const int IKCP_CMD_WASK = 83; // cmd: window probe (ask) + /// + /// 窗口通知报文,通知对端剩余接收窗口的大小. + /// + public const int IKCP_CMD_WINS = 84; // cmd: window size (tell) + /// + /// IKCP_ASK_SEND表示请求远端告知窗口大小 + /// + public const int IKCP_ASK_SEND = 1; // need to send IKCP_CMD_WASK + /// + /// IKCP_ASK_TELL表示告知远端窗口大小。 + /// + public const int IKCP_ASK_TELL = 2; // need to send IKCP_CMD_WINS + public const int IKCP_WND_SND = 32; + /// + /// 接收窗口默认值。必须大于最大分片数 + /// + public const int IKCP_WND_RCV = 128; // must >= max fragment size + /// + /// 默认最大传输单元 常见路由值 1492 1480 默认1400保证在路由层不会被分片 + /// + public const int IKCP_MTU_DEF = 1400; + public const int IKCP_ACK_FAST = 3; + public const int IKCP_INTERVAL = 100; + public const int IKCP_OVERHEAD = 24; + public const int IKCP_DEADLINK = 20; + public const int IKCP_THRESH_INIT = 2; + public const int IKCP_THRESH_MIN = 2; + /// + /// 窗口探查CD + /// + public const int IKCP_PROBE_INIT = 7000; // 7 secs to probe window size + public const int IKCP_PROBE_LIMIT = 120000; // up to 120 secs to probe window + public const int IKCP_FASTACK_LIMIT = 5; // max times to trigger fastack + #endregion + + /// + /// https://github.com/skywind3000/kcp/issues/53 + /// 按照 C版 设计，使用小端字节序 + /// + public static bool IsLittleEndian = true; + } + + /// + /// https://luyuhuang.tech/2020/12/09/kcp.html + /// https://github.com/skywind3000/kcp/wiki/Network-Layer + /// 外部buffer ----拆分拷贝----等待列表 -----移动----发送列表----拷贝----发送buffer---output + /// https://github.com/skywind3000/kcp/issues/118#issuecomment-338133930 + /// + public partial class KcpCore : KcpConst, IKcpSetting, IKcpUpdate, IDisposable + where Segment : IKcpSegment + { + #region kcp members + /// + /// 频道号 + /// + public uint conv { get; protected set; } + /// + /// 最大传输单元（Maximum Transmission Unit，MTU） + /// + protected uint mtu; + + /// + /// 缓冲区最小大小 + /// + protected int BufferNeedSize + { + [MethodImpl(MethodImplOptions.AggressiveInlining)] + get + { + return (int)((mtu/* + IKCP_OVERHEAD*/) /** 3*/); + } + } + + /// + /// 最大报文段长度 + /// + protected uint mss; + /// + /// 连接状态（0xFFFFFFFF表示断开连接） + /// + protected int state; + /// + /// 第一个未确认的包 + /// + protected uint snd_una; + /// + /// 待发送包的序号 + /// + protected uint snd_nxt; + /// + /// 下一个等待接收消息ID,待接收消息序号 + /// + protected uint rcv_nxt; + protected uint ts_recent; + protected uint ts_lastack; + /// + /// 拥塞窗口阈值 + /// + protected uint ssthresh; + /// + /// ack接收rtt浮动值 + /// + protected uint rx_rttval; + /// + /// ack接收rtt静态值 + /// + protected uint rx_srtt; + /// + /// 由ack接收延迟计算出来的复原时间。Retransmission TimeOut(RTO), 超时重传时间. + /// + protected uint rx_rto; + /// + /// 最小复原时间 + /// + protected uint rx_minrto; + /// + /// 发送窗口大小 + /// + protected uint snd_wnd; + /// + /// 接收窗口大小 + /// + protected uint rcv_wnd; + /// + /// 远端接收窗口大小 + /// + protected uint rmt_wnd; + /// + /// 拥塞窗口大小 + /// + protected uint cwnd; + /// + /// 探查变量，IKCP_ASK_TELL表示告知远端窗口大小。IKCP_ASK_SEND表示请求远端告知窗口大小 + /// + protected uint probe; + protected uint current; + /// + /// 内部flush刷新间隔 + /// + protected uint interval; + /// + /// 下次flush刷新时间戳 + /// + protected uint ts_flush; + protected uint xmit; + /// + /// 是否启动无延迟模式 + /// + protected uint nodelay; + /// + /// 是否调用过update函数的标识 + /// + protected uint updated; + /// + /// 下次探查窗口的时间戳 + /// + protected uint ts_probe; + /// + /// 探查窗口需要等待的时间 + /// + protected uint probe_wait; + /// + /// 最大重传次数 + /// + protected uint dead_link; + /// + /// 可发送的最大数据量 + /// + protected uint incr; + /// + /// 触发快速重传的重复ack个数 + /// + public int fastresend; + public int fastlimit; + /// + /// 取消拥塞控制 + /// + protected int nocwnd; + protected int logmask; + /// + /// 是否采用流传输模式 + /// + public int stream; + protected BufferOwner buffer; + + #endregion + + #region 锁和容器 + + /// + /// 增加锁保证发送线程安全，否则可能导致2个消息的分片交替入队。 + /// 用例：普通发送和广播可能会导致多个线程同时调用Send方法。 + /// + protected readonly object snd_queueLock = new object(); + protected readonly object snd_bufLock = new object(); + protected readonly object rcv_bufLock = new object(); + protected readonly object rcv_queueLock = new object(); + + /// + /// 发送 ack 队列 + /// + protected ConcurrentQueue<(uint sn, uint ts)> acklist = new ConcurrentQueue<(uint sn, uint ts)>(); + /// + /// 发送等待队列 + /// + internal ConcurrentQueue snd_queue = new ConcurrentQueue(); + /// + /// 正在发送列表 + /// + internal LinkedList snd_buf = new LinkedList(); + /// + /// 正在等待触发接收回调函数消息列表 + /// 需要执行的操作 添加 遍历 删除 + /// + internal List rcv_queue = new List(); + /// + /// 正在等待重组消息列表 + /// 需要执行的操作 添加 插入 遍历 删除 + /// + internal LinkedList rcv_buf = new LinkedList(); + + /// + /// get how many packet is waiting to be sent + /// + /// + public int WaitSnd => snd_buf.Count + snd_queue.Count; + + #endregion + + public ISegmentManager SegmentManager { get; set; } + public KcpCore(uint conv_) + { + conv = conv_; + + snd_wnd = IKCP_WND_SND; + rcv_wnd = IKCP_WND_RCV; + rmt_wnd = IKCP_WND_RCV; + mtu = IKCP_MTU_DEF; + mss = mtu - IKCP_OVERHEAD; + buffer = CreateBuffer(BufferNeedSize); + + rx_rto = IKCP_RTO_DEF; + rx_minrto = IKCP_RTO_MIN; + interval = IKCP_INTERVAL; + ts_flush = IKCP_INTERVAL; + ssthresh = IKCP_THRESH_INIT; + fastlimit = IKCP_FASTACK_LIMIT; + dead_link = IKCP_DEADLINK; + } + + #region IDisposable Support + private bool disposedValue = false; // 要检测冗余调用 + + /// + /// 是否正在释放 + /// + private bool m_disposing = false; + + protected bool CheckDispose() + { + if (m_disposing) + { + return true; + } + + if (disposedValue) + { + throw new ObjectDisposedException( + $"{nameof(Kcp)} [conv:{conv}]"); + } + + return false; + } + + protected virtual void Dispose(bool disposing) + { + try + { + m_disposing = true; + if (!disposedValue) + { + if (disposing) + { + // 释放托管状态(托管对象)。 + callbackHandle = null; + acklist = null; + buffer = null; + } + + // 释放未托管的资源(未托管的对象)并在以下内容中替代终结器。 + // 将大型字段设置为 null。 + void FreeCollection(IEnumerable collection) + { + if (collection == null) + { + return; + } + foreach (var item in collection) + { + try + { + SegmentManager.Free(item); + } + catch (Exception) + { + //理论上此处不会有任何异常 + LogFail($"此处绝不应该出现异常。 Dispose 时出现预计外异常，联系作者"); + } + } + } + + lock (snd_queueLock) + { + while (snd_queue != null && + (snd_queue.TryDequeue(out var segment) + || !snd_queue.IsEmpty) + ) + { + try + { + SegmentManager.Free(segment); + } + catch (Exception) + { + //理论上这里没有任何异常； + } + } + snd_queue = null; + } + + lock (snd_bufLock) + { + FreeCollection(snd_buf); + snd_buf?.Clear(); + snd_buf = null; + } + + lock (rcv_bufLock) + { + FreeCollection(rcv_buf); + rcv_buf?.Clear(); + rcv_buf = null; + } + + lock (rcv_queueLock) + { + FreeCollection(rcv_queue); + rcv_queue?.Clear(); + rcv_queue = null; + } + + + disposedValue = true; + } + } + finally + { + m_disposing = false; + } + + } + + // 仅当以上 Dispose(bool disposing) 拥有用于释放未托管资源的代码时才替代终结器。 + ~KcpCore() + { + // 请勿更改此代码。将清理代码放入以上 Dispose(bool disposing) 中。 + Dispose(false); + } + + // 添加此代码以正确实现可处置模式。 + /// + /// 释放不是严格线程安全的，尽量使用和Update相同的线程调用， + /// 或者等待析构时自动释放。 + /// + public void Dispose() + { + // 请勿更改此代码。将清理代码放入以上 Dispose(bool disposing) 中。 + Dispose(true); + // 如果在以上内容中替代了终结器，则取消注释以下行。 + GC.SuppressFinalize(this); + } + + #endregion + + internal protected IKcpCallback callbackHandle; + internal protected IKcpOutputWriter OutputWriter; + + protected static uint Ibound(uint lower, uint middle, uint upper) + { + return Min(Max(lower, middle), upper); + } + + protected static int Itimediff(uint later, uint earlier) + { + return ((int)(later - earlier)); + } + + internal protected virtual BufferOwner CreateBuffer(int needSize) + { + return new KcpInnerBuffer(needSize); + } + + internal protected class KcpInnerBuffer : BufferOwner + { + private readonly Memory _memory; + + public Memory Memory + { + get + { + if (alreadyDisposed) + { + throw new ObjectDisposedException(nameof(KcpInnerBuffer)); + } + return _memory; + } + } + + public KcpInnerBuffer(int size) + { + _memory = new Memory(new byte[size]); + } + + bool alreadyDisposed = false; + public void Dispose() + { + alreadyDisposed = true; + } + } + + + #region 功能逻辑 + + //功能函数 + + /// + /// Determine when should you invoke ikcp_update: + /// returns when you should invoke ikcp_update in millisec, if there + /// is no ikcp_input/_send calling. you can call ikcp_update in that + /// time, instead of call update repeatly. + /// + /// Important to reduce unnacessary ikcp_update invoking. use it to + /// schedule ikcp_update (eg. implementing an epoll-like mechanism, + /// or optimize ikcp_update when handling massive kcp connections) + /// + /// + /// + /// + public DateTimeOffset Check(in DateTimeOffset time) + { + if (CheckDispose()) + { + //检查释放 + return default; + } + + if (updated == 0) + { + return time; + } + + var current_ = time.ConvertTime(); + + var ts_flush_ = ts_flush; + var tm_flush_ = 0x7fffffff; + var tm_packet = 0x7fffffff; + var minimal = 0; + + if (Itimediff(current_, ts_flush_) >= 10000 || Itimediff(current_, ts_flush_) < -10000) + { + ts_flush_ = current_; + } + + if (Itimediff(current_, ts_flush_) >= 0) + { + return time; + } + + tm_flush_ = Itimediff(ts_flush_, current_); + + lock (snd_bufLock) + { + foreach (var seg in snd_buf) + { + var diff = Itimediff(seg.resendts, current_); + if (diff <= 0) + { + return time; + } + + if (diff < tm_packet) + { + tm_packet = diff; + } + } + } + + minimal = tm_packet < tm_flush_ ? tm_packet : tm_flush_; + if (minimal >= interval) minimal = (int)interval; + + return time + TimeSpan.FromMilliseconds(minimal); + } + + /// + /// move available data from rcv_buf -> rcv_queue + /// + protected void Move_Rcv_buf_2_Rcv_queue() + { + lock (rcv_bufLock) + { + while (rcv_buf.Count > 0) + { + var seg = rcv_buf.First.Value; + if (seg.sn == rcv_nxt && rcv_queue.Count < rcv_wnd) + { + rcv_buf.RemoveFirst(); + lock (rcv_queueLock) + { + rcv_queue.Add(seg); + } + + rcv_nxt++; + } + else + { + break; + } + } + } + } + + /// + /// update ack. + /// + /// + protected void Update_ack(int rtt) + { + if (rx_srtt == 0) + { + rx_srtt = (uint)rtt; + rx_rttval = (uint)rtt / 2; + } + else + { + int delta = (int)((uint)rtt - rx_srtt); + + if (delta < 0) + { + delta = -delta; + } + + rx_rttval = (3 * rx_rttval + (uint)delta) / 4; + rx_srtt = (uint)((7 * rx_srtt + rtt) / 8); + + if (rx_srtt < 1) + { + rx_srtt = 1; + } + } + + var rto = rx_srtt + Max(interval, 4 * rx_rttval); + + rx_rto = Ibound(rx_minrto, rto, IKCP_RTO_MAX); + } + + protected void Shrink_buf() + { + lock (snd_bufLock) + { + snd_una = snd_buf.Count > 0 ? snd_buf.First.Value.sn : snd_nxt; + } + } + + protected void Parse_ack(uint sn) + { + if (Itimediff(sn, snd_una) < 0 || Itimediff(sn, snd_nxt) >= 0) + { + return; + } + + lock (snd_bufLock) + { + for (var p = snd_buf.First; p != null; p = p.Next) + { + var seg = p.Value; + if (sn == seg.sn) + { + snd_buf.Remove(p); + SegmentManager.Free(seg); + break; + } + + if (Itimediff(sn, seg.sn) < 0) + { + break; + } + } + } + } + + protected void Parse_una(uint una) + { + /// 删除给定时间之前的片段。保留之后的片段 + lock (snd_bufLock) + { + while (snd_buf.First != null) + { + var seg = snd_buf.First.Value; + if (Itimediff(una, seg.sn) > 0) + { + snd_buf.RemoveFirst(); + SegmentManager.Free(seg); + } + else + { + break; + } + } + } + + } + + protected void Parse_fastack(uint sn, uint ts) + { + if (Itimediff(sn, snd_una) < 0 || Itimediff(sn, snd_nxt) >= 0) + { + return; + } + + lock (snd_bufLock) + { + foreach (var item in snd_buf) + { + var seg = item; + if (Itimediff(sn, seg.sn) < 0) + { + break; + } + else if (sn != seg.sn) + { +#if !IKCP_FASTACK_CONSERVE + seg.fastack++; +#else + if (Itimediff(ts, seg.ts) >= 0) + { + seg.fastack++; + } +#endif + } + } + } + } + + /// + /// 处理下层网络收到的数据包 + /// + /// + internal virtual void Parse_data(Segment newseg) + { + var sn = newseg.sn; + + lock (rcv_bufLock) + { + if (Itimediff(sn, rcv_nxt + rcv_wnd) >= 0 || Itimediff(sn, rcv_nxt) < 0) + { + // 如果接收到数据报文的编号大于 rcv_nxt + rcv_wnd 或小于 rcv_nxt, 这个报文就会被丢弃. + SegmentManager.Free(newseg); + return; + } + + var repeat = false; + + ///检查是否重复消息和插入位置 + LinkedListNode p; + for (p = rcv_buf.Last; p != null; p = p.Previous) + { + var seg = p.Value; + if (seg.sn == sn) + { + repeat = true; + break; + } + + if (Itimediff(sn, seg.sn) > 0) + { + break; + } + } + + if (!repeat) + { + if (CanLog(KcpLogMask.IKCP_LOG_PARSE_DATA)) + { + LogWriteLine($"{newseg.ToLogString()}", KcpLogMask.IKCP_LOG_PARSE_DATA.ToString()); + } + + if (p == null) + { + rcv_buf.AddFirst(newseg); + if (newseg.frg + 1 > rcv_wnd) + { + //分片数大于接收窗口，造成kcp阻塞冻结。 + //Console.WriteLine($"分片数大于接收窗口，造成kcp阻塞冻结。frgCount:{newseg.frg + 1} rcv_wnd:{rcv_wnd}"); + //百分之百阻塞冻结，打印日志没有必要。直接抛出异常。 + throw new NotSupportedException($"分片数大于接收窗口，造成kcp阻塞冻结。frgCount:{newseg.frg + 1} rcv_wnd:{rcv_wnd}"); + } + } + else + { + rcv_buf.AddAfter(p, newseg); + } + + } + else + { + SegmentManager.Free(newseg); + } + } + + Move_Rcv_buf_2_Rcv_queue(); + } + + protected ushort Wnd_unused() + { + ///此处没有加锁，所以不要内联变量，否则可能导致 判断变量和赋值变量不一致 + int waitCount = rcv_queue.Count; + + if (waitCount < rcv_wnd) + { + //Q:为什么要减去nrcv_que，rcv_queue中已经排好序了，还要算在接收窗口内，感觉不能理解？ + //现在问题是如果一个超大数据包，分片数大于rcv_wnd接收窗口，会导致rcv_wnd持续为0，阻塞整个流程。 + //个人理解，rcv_queue中的数据是已经确认的数据，无论用户是否recv，都不应该影响收发。 + //A:现在在发送出加一个分片数检测，过大直接抛出异常。防止阻塞发送。 + //在接收端也加一个检测，如果（frg+1）分片数 > rcv_wnd,也要抛出一个异常或者警告。至少有个提示。 + + /// fix https://github.com/skywind3000/kcp/issues/126 + /// 实际上 rcv_wnd 不应该大于65535 + var count = rcv_wnd - waitCount; + return (ushort)Min(count, ushort.MaxValue); + } + + return 0; + } + + /// + /// flush pending data + /// + protected void Flush() + { + var current_ = current; + var buffer_ = buffer; + var change = 0; + var lost = 0; + var offset = 0; + + if (updated == 0) + { + return; + } + + ushort wnd_ = Wnd_unused(); + + unsafe + { + ///在栈上分配这个segment,这个segment随用随销毁，不会被保存 + const int len = KcpSegment.LocalOffset + KcpSegment.HeadOffset; + var ptr = stackalloc byte[len]; + KcpSegment seg = new KcpSegment(ptr, 0); + //seg = KcpSegment.AllocHGlobal(0); + + seg.conv = conv; + seg.cmd = IKCP_CMD_ACK; + //seg.frg = 0; + seg.wnd = wnd_; + seg.una = rcv_nxt; + //seg.len = 0; + //seg.sn = 0; + //seg.ts = 0; + + #region flush acknowledges + + if (CheckDispose()) + { + //检查释放 + return; + } + + while (acklist.TryDequeue(out var temp)) + { + if (offset + IKCP_OVERHEAD > mtu) + { + callbackHandle.Output(buffer, offset); + offset = 0; + buffer = CreateBuffer(BufferNeedSize); + + //IKcpOutputer outputer = null; + //var span = outputer.GetSpan(offset); + //buffer.Memory.Span.Slice(0, offset).CopyTo(span); + //outputer.Advance(offset); + //outputer.Flush(); + } + + seg.sn = temp.sn; + seg.ts = temp.ts; + offset += seg.Encode(buffer.Memory.Span.Slice(offset)); + } + + #endregion + + #region probe window size (if remote window size equals zero) + // probe window size (if remote window size equals zero) + if (rmt_wnd == 0) + { + if (probe_wait == 0) + { + probe_wait = IKCP_PROBE_INIT; + ts_probe = current + probe_wait; + } + else + { + if (Itimediff(current, ts_probe) >= 0) + { + if (probe_wait < IKCP_PROBE_INIT) + { + probe_wait = IKCP_PROBE_INIT; + } + + probe_wait += probe_wait / 2; + + if (probe_wait > IKCP_PROBE_LIMIT) + { + probe_wait = IKCP_PROBE_LIMIT; + } + + ts_probe = current + probe_wait; + probe |= IKCP_ASK_SEND; + } + } + } + else + { + ts_probe = 0; + probe_wait = 0; + } + #endregion + + #region flush window probing commands + // flush window probing commands + if ((probe & IKCP_ASK_SEND) != 0) + { + seg.cmd = IKCP_CMD_WASK; + if (offset + IKCP_OVERHEAD > (int)mtu) + { + callbackHandle.Output(buffer, offset); + offset = 0; + buffer = CreateBuffer(BufferNeedSize); + } + offset += seg.Encode(buffer.Memory.Span.Slice(offset)); + } + + if ((probe & IKCP_ASK_TELL) != 0) + { + seg.cmd = IKCP_CMD_WINS; + if (offset + IKCP_OVERHEAD > (int)mtu) + { + callbackHandle.Output(buffer, offset); + offset = 0; + buffer = CreateBuffer(BufferNeedSize); + } + offset += seg.Encode(buffer.Memory.Span.Slice(offset)); + } + + probe = 0; + #endregion + } + + #region 刷新，将发送等待列表移动到发送列表 + + // calculate window size + var cwnd_ = Min(snd_wnd, rmt_wnd); + if (nocwnd == 0) + { + cwnd_ = Min(cwnd, cwnd_); + } + + while (Itimediff(snd_nxt, snd_una + cwnd_) < 0) + { + if (snd_queue.TryDequeue(out var newseg)) + { + newseg.conv = conv; + newseg.cmd = IKCP_CMD_PUSH; + newseg.wnd = wnd_; + newseg.ts = current_; + newseg.sn = snd_nxt; + snd_nxt++; + newseg.una = rcv_nxt; + newseg.resendts = current_; + newseg.rto = rx_rto; + newseg.fastack = 0; + newseg.xmit = 0; + lock (snd_bufLock) + { + snd_buf.AddLast(newseg); + } + } + else + { + break; + } + } + + #endregion + + #region 刷新 发送列表，调用Output + + // calculate resent + var resent = fastresend > 0 ? (uint)fastresend : 0xffffffff; + var rtomin = nodelay == 0 ? (rx_rto >> 3) : 0; + + lock (snd_bufLock) + { + // flush data segments + foreach (var item in snd_buf) + { + var segment = item; + var needsend = false; + var debug = Itimediff(current_, segment.resendts); + if (segment.xmit == 0) + { + //新加入 snd_buf 中, 从未发送过的报文直接发送出去; + needsend = true; + segment.xmit++; + segment.rto = rx_rto; + segment.resendts = current_ + rx_rto + rtomin; + } + else if (Itimediff(current_, segment.resendts) >= 0) + { + //发送过的, 但是在 RTO 内未收到 ACK 的报文, 需要重传; + needsend = true; + segment.xmit++; + this.xmit++; + if (nodelay == 0) + { + segment.rto += Math.Max(segment.rto, rx_rto); + } + else + { + var step = nodelay < 2 ? segment.rto : rx_rto; + segment.rto += step / 2; + } + + segment.resendts = current_ + segment.rto; + lost = 1; + } + else if (segment.fastack >= resent) + { + //发送过的, 但是 ACK 失序若干次的报文, 需要执行快速重传. + if (segment.xmit <= fastlimit + || fastlimit <= 0) + { + needsend = true; + segment.xmit++; + segment.fastack = 0; + segment.resendts = current_ + segment.rto; + change++; + } + } + + if (needsend) + { + segment.ts = current_; + segment.wnd = wnd_; + segment.una = rcv_nxt; + + var need = IKCP_OVERHEAD + segment.len; + if (offset + need > mtu) + { + callbackHandle.Output(buffer, offset); + offset = 0; + buffer = CreateBuffer(BufferNeedSize); + } + + offset += segment.Encode(buffer.Memory.Span.Slice(offset)); + + if (CanLog(KcpLogMask.IKCP_LOG_NEED_SEND)) + { + LogWriteLine($"{segment.ToLogString(true)}", KcpLogMask.IKCP_LOG_NEED_SEND.ToString()); + } + + if (segment.xmit >= dead_link) + { + state = -1; + + if (CanLog(KcpLogMask.IKCP_LOG_DEAD_LINK)) + { + LogWriteLine($"state = -1; xmit:{segment.xmit} >= dead_link:{dead_link}", KcpLogMask.IKCP_LOG_DEAD_LINK.ToString()); + } + } + } + } + } + + // flash remain segments + if (offset > 0) + { + callbackHandle.Output(buffer, offset); + offset = 0; + buffer = CreateBuffer(BufferNeedSize); + } + + #endregion + + #region update ssthresh + // update ssthresh 根据丢包情况计算 ssthresh 和 cwnd. + if (change != 0) + { + var inflight = snd_nxt - snd_una; + ssthresh = inflight / 2; + if (ssthresh < IKCP_THRESH_MIN) + { + ssthresh = IKCP_THRESH_MIN; + } + + cwnd = ssthresh + resent; + incr = cwnd * mss; + } + + if (lost != 0) + { + ssthresh = cwnd / 2; + if (ssthresh < IKCP_THRESH_MIN) + { + ssthresh = IKCP_THRESH_MIN; + } + + cwnd = 1; + incr = mss; + } + + if (cwnd < 1) + { + cwnd = 1; + incr = mss; + } + #endregion + + if (state == -1) + { + OnDeadlink(); + } + } + + protected virtual void OnDeadlink() + { + + } + + /// + /// Test OutputWriter + /// + protected void Flush2() + { + var current_ = current; + var change = 0; + var lost = 0; + + if (updated == 0) + { + return; + } + + ushort wnd_ = Wnd_unused(); + + unsafe + { + ///在栈上分配这个segment,这个segment随用随销毁，不会被保存 + const int len = KcpSegment.LocalOffset + KcpSegment.HeadOffset; + var ptr = stackalloc byte[len]; + KcpSegment seg = new KcpSegment(ptr, 0); + //seg = KcpSegment.AllocHGlobal(0); + + seg.conv = conv; + seg.cmd = IKCP_CMD_ACK; + //seg.frg = 0; + seg.wnd = wnd_; + seg.una = rcv_nxt; + //seg.len = 0; + //seg.sn = 0; + //seg.ts = 0; + + #region flush acknowledges + + if (CheckDispose()) + { + //检查释放 + return; + } + + while (acklist.TryDequeue(out var temp)) + { + if (OutputWriter.UnflushedBytes + IKCP_OVERHEAD > mtu) + { + OutputWriter.Flush(); + } + + seg.sn = temp.sn; + seg.ts = temp.ts; + seg.Encode(OutputWriter); + } + + #endregion + + #region probe window size (if remote window size equals zero) + // probe window size (if remote window size equals zero) + if (rmt_wnd == 0) + { + if (probe_wait == 0) + { + probe_wait = IKCP_PROBE_INIT; + ts_probe = current + probe_wait; + } + else + { + if (Itimediff(current, ts_probe) >= 0) + { + if (probe_wait < IKCP_PROBE_INIT) + { + probe_wait = IKCP_PROBE_INIT; + } + + probe_wait += probe_wait / 2; + + if (probe_wait > IKCP_PROBE_LIMIT) + { + probe_wait = IKCP_PROBE_LIMIT; + } + + ts_probe = current + probe_wait; + probe |= IKCP_ASK_SEND; + } + } + } + else + { + ts_probe = 0; + probe_wait = 0; + } + #endregion + + #region flush window probing commands + // flush window probing commands + if ((probe & IKCP_ASK_SEND) != 0) + { + seg.cmd = IKCP_CMD_WASK; + if (OutputWriter.UnflushedBytes + IKCP_OVERHEAD > (int)mtu) + { + OutputWriter.Flush(); + } + seg.Encode(OutputWriter); + } + + if ((probe & IKCP_ASK_TELL) != 0) + { + seg.cmd = IKCP_CMD_WINS; + if (OutputWriter.UnflushedBytes + IKCP_OVERHEAD > (int)mtu) + { + OutputWriter.Flush(); + } + seg.Encode(OutputWriter); + } + + probe = 0; + #endregion + } + + #region 刷新，将发送等待列表移动到发送列表 + + // calculate window size + var cwnd_ = Min(snd_wnd, rmt_wnd); + if (nocwnd == 0) + { + cwnd_ = Min(cwnd, cwnd_); + } + + while (Itimediff(snd_nxt, snd_una + cwnd_) < 0) + { + if (snd_queue.TryDequeue(out var newseg)) + { + newseg.conv = conv; + newseg.cmd = IKCP_CMD_PUSH; + newseg.wnd = wnd_; + newseg.ts = current_; + newseg.sn = snd_nxt; + snd_nxt++; + newseg.una = rcv_nxt; + newseg.resendts = current_; + newseg.rto = rx_rto; + newseg.fastack = 0; + newseg.xmit = 0; + lock (snd_bufLock) + { + snd_buf.AddLast(newseg); + } + } + else + { + break; + } + } + + #endregion + + #region 刷新 发送列表，调用Output + + // calculate resent + var resent = fastresend > 0 ? (uint)fastresend : 0xffffffff; + var rtomin = nodelay == 0 ? (rx_rto >> 3) : 0; + + lock (snd_bufLock) + { + // flush data segments + foreach (var item in snd_buf) + { + var segment = item; + var needsend = false; + var debug = Itimediff(current_, segment.resendts); + if (segment.xmit == 0) + { + //新加入 snd_buf 中, 从未发送过的报文直接发送出去; + needsend = true; + segment.xmit++; + segment.rto = rx_rto; + segment.resendts = current_ + rx_rto + rtomin; + } + else if (Itimediff(current_, segment.resendts) >= 0) + { + //发送过的, 但是在 RTO 内未收到 ACK 的报文, 需要重传; + needsend = true; + segment.xmit++; + this.xmit++; + if (nodelay == 0) + { + segment.rto += Math.Max(segment.rto, rx_rto); + } + else + { + var step = nodelay < 2 ? segment.rto : rx_rto; + segment.rto += step / 2; + } + + segment.resendts = current_ + segment.rto; + lost = 1; + } + else if (segment.fastack >= resent) + { + //发送过的, 但是 ACK 失序若干次的报文, 需要执行快速重传. + if (segment.xmit <= fastlimit + || fastlimit <= 0) + { + needsend = true; + segment.xmit++; + segment.fastack = 0; + segment.resendts = current_ + segment.rto; + change++; + } + } + + if (needsend) + { + segment.ts = current_; + segment.wnd = wnd_; + segment.una = rcv_nxt; + + var need = IKCP_OVERHEAD + segment.len; + if (OutputWriter.UnflushedBytes + need > mtu) + { + OutputWriter.Flush(); + } + + segment.Encode(OutputWriter); + + if (CanLog(KcpLogMask.IKCP_LOG_NEED_SEND)) + { + LogWriteLine($"{segment.ToLogString(true)}", KcpLogMask.IKCP_LOG_NEED_SEND.ToString()); + } + + if (segment.xmit >= dead_link) + { + state = -1; + + if (CanLog(KcpLogMask.IKCP_LOG_DEAD_LINK)) + { + LogWriteLine($"state = -1; xmit:{segment.xmit} >= dead_link:{dead_link}", KcpLogMask.IKCP_LOG_DEAD_LINK.ToString()); + } + } + } + } + } + + + // flash remain segments + if (OutputWriter.UnflushedBytes > 0) + { + OutputWriter.Flush(); + } + + #endregion + + #region update ssthresh + // update ssthresh 根据丢包情况计算 ssthresh 和 cwnd. + if (change != 0) + { + var inflight = snd_nxt - snd_una; + ssthresh = inflight / 2; + if (ssthresh < IKCP_THRESH_MIN) + { + ssthresh = IKCP_THRESH_MIN; + } + + cwnd = ssthresh + resent; + incr = cwnd * mss; + } + + if (lost != 0) + { + ssthresh = cwnd / 2; + if (ssthresh < IKCP_THRESH_MIN) + { + ssthresh = IKCP_THRESH_MIN; + } + + cwnd = 1; + incr = mss; + } + + if (cwnd < 1) + { + cwnd = 1; + incr = mss; + } + #endregion + + if (state == -1) + { + OnDeadlink(); + } + } + + /// + /// update state (call it repeatedly, every 10ms-100ms), or you can ask + /// ikcp_check when to call it again (without ikcp_input/_send calling). + /// + /// DateTime.UtcNow + public void Update(in DateTimeOffset time) + { + if (CheckDispose()) + { + //检查释放 + return; + } + + current = time.ConvertTime(); + + if (updated == 0) + { + updated = 1; + ts_flush = current; + } + + var slap = Itimediff(current, ts_flush); + + if (slap >= 10000 || slap < -10000) + { + ts_flush = current; + slap = 0; + } + + if (slap >= 0) + { + ts_flush += interval; + if (Itimediff(current, ts_flush) >= 0) + { + ts_flush = current + interval; + } + + Flush(); + } + } + + #endregion + + #region 设置控制 + + public int SetMtu(int mtu = IKCP_MTU_DEF) + { + if (mtu < 50 || mtu < IKCP_OVERHEAD) + { + return -1; + } + + var buffer_ = CreateBuffer(BufferNeedSize); + if (null == buffer_) + { + return -2; + } + + this.mtu = (uint)mtu; + mss = this.mtu - IKCP_OVERHEAD; + buffer.Dispose(); + buffer = buffer_; + return 0; + } + + /// + /// + /// + /// + /// + public int Interval(int interval_) + { + if (interval_ > 5000) + { + interval_ = 5000; + } + else if (interval_ < 0) + { + /// 将最小值 10 改为 0； + ///在特殊形况下允许CPU满负荷运转； + interval_ = 0; + } + interval = (uint)interval_; + return 0; + } + + public int NoDelay(int nodelay_, int interval_, int resend_, int nc_) + { + + if (nodelay_ > 0) + { + nodelay = (uint)nodelay_; + if (nodelay_ != 0) + { + rx_minrto = IKCP_RTO_NDL; + } + else + { + rx_minrto = IKCP_RTO_MIN; + } + } + + if (resend_ >= 0) + { + fastresend = resend_; + } + + if (nc_ >= 0) + { + nocwnd = nc_; + } + + return Interval(interval_); + } + + public int WndSize(int sndwnd = IKCP_WND_SND, int rcvwnd = IKCP_WND_RCV) + { + if (sndwnd > 0) + { + snd_wnd = (uint)sndwnd; + } + + if (rcvwnd > 0) + { + rcv_wnd = (uint)rcvwnd; + } + + return 0; + } + + #endregion + + + } + + public partial class KcpCore : IKcpSendable + { + /// + /// user/upper level send, returns below zero for error + /// + /// + /// + /// + public int Send(ReadOnlySpan span, object options = null) + { + if (CheckDispose()) + { + //检查释放 + return -4; + } + + if (mss <= 0) + { + throw new InvalidOperationException($" mss <= 0 "); + } + + + if (span.Length == 0) + { + return -1; + } + var offset = 0; + int count; + + #region append to previous segment in streaming mode (if possible) + /// 基于线程安全和数据结构的等原因,移除了追加数据到最后一个包行为。 + #endregion + + #region fragment + + if (span.Length <= mss) + { + count = 1; + } + else + { + count = (int)(span.Length + mss - 1) / (int)mss; + } + + if (count > IKCP_WND_RCV) + { + return -2; + } + + if (count == 0) + { + count = 1; + } + + lock (snd_queueLock) + { + for (var i = 0; i < count; i++) + { + int size; + if (span.Length - offset > mss) + { + size = (int)mss; + } + else + { + size = (int)span.Length - offset; + } + + var seg = SegmentManager.Alloc(size); + span.Slice(offset, size).CopyTo(seg.data); + offset += size; + seg.frg = (byte)(count - i - 1); + snd_queue.Enqueue(seg); + } + } + + #endregion + + return 0; + } + + //public int Send(Span span) + //{ + // return Send((ReadOnlySpan)span); + //} + + public int Send(ReadOnlySequence span, object options = null) + { + if (CheckDispose()) + { + //检查释放 + return -4; + } + + if (mss <= 0) + { + throw new InvalidOperationException($" mss <= 0 "); + } + + + if (span.Length == 0) + { + return -1; + } + var offset = 0; + int count; + + #region append to previous segment in streaming mode (if possible) + /// 基于线程安全和数据结构的等原因,移除了追加数据到最后一个包行为。 + #endregion + + #region fragment + + if (span.Length <= mss) + { + count = 1; + } + else + { + count = (int)(span.Length + mss - 1) / (int)mss; + } + + if (count > IKCP_WND_RCV) + { + return -2; + } + + if (count == 0) + { + count = 1; + } + + lock (snd_queueLock) + { + for (var i = 0; i < count; i++) + { + int size; + if (span.Length - offset > mss) + { + size = (int)mss; + } + else + { + size = (int)span.Length - offset; + } + + var seg = SegmentManager.Alloc(size); + span.Slice(offset, size).CopyTo(seg.data); + offset += size; + seg.frg = (byte)(count - i - 1); + snd_queue.Enqueue(seg); + } + } + + #endregion + + return 0; + } + } + + public partial class KcpCore : IKcpInputable + { + /// + /// when you received a low level packet (eg. UDP packet), call it + /// + /// + /// + public int Input(ReadOnlySpan span) + { + if (CheckDispose()) + { + //检查释放 + return -4; + } + + if (CanLog(KcpLogMask.IKCP_LOG_INPUT)) + { + LogWriteLine($"[RI] {span.Length} bytes", KcpLogMask.IKCP_LOG_INPUT.ToString()); + } + + if (span.Length < IKCP_OVERHEAD) + { + return -1; + } + + uint prev_una = snd_una; + var offset = 0; + int flag = 0; + uint maxack = 0; + uint latest_ts = 0; + while (true) + { + uint ts = 0; + uint sn = 0; + uint length = 0; + uint una = 0; + uint conv_ = 0; + ushort wnd = 0; + byte cmd = 0; + byte frg = 0; + + if (span.Length - offset < IKCP_OVERHEAD) + { + break; + } + + Span header = stackalloc byte[24]; + span.Slice(offset, 24).CopyTo(header); + offset += ReadHeader(header, + ref conv_, + ref cmd, + ref frg, + ref wnd, + ref ts, + ref sn, + ref una, + ref length); + + if (conv != conv_) + { + return -1; + } + + if (span.Length - offset < length || (int)length < 0) + { + return -2; + } + + switch (cmd) + { + case IKCP_CMD_PUSH: + case IKCP_CMD_ACK: + case IKCP_CMD_WASK: + case IKCP_CMD_WINS: + break; + default: + return -3; + } + + rmt_wnd = wnd; + Parse_una(una); + Shrink_buf(); + + if (IKCP_CMD_ACK == cmd) + { + if (Itimediff(current, ts) >= 0) + { + Update_ack(Itimediff(current, ts)); + } + Parse_ack(sn); + Shrink_buf(); + + if (flag == 0) + { + flag = 1; + maxack = sn; + latest_ts = ts; + } + else if (Itimediff(sn, maxack) > 0) + { +#if !IKCP_FASTACK_CONSERVE + maxack = sn; + latest_ts = ts; +#else + if (Itimediff(ts, latest_ts) > 0) + { + maxack = sn; + latest_ts = ts; + } +#endif + } + + if (CanLog(KcpLogMask.IKCP_LOG_IN_ACK)) + { + LogWriteLine($"input ack: sn={sn} rtt={Itimediff(current, ts)} rto={rx_rto}", KcpLogMask.IKCP_LOG_IN_ACK.ToString()); + } + } + else if (IKCP_CMD_PUSH == cmd) + { + if (CanLog(KcpLogMask.IKCP_LOG_IN_DATA)) + { + LogWriteLine($"input psh: sn={sn} ts={ts}", KcpLogMask.IKCP_LOG_IN_DATA.ToString()); + } + + if (Itimediff(sn, rcv_nxt + rcv_wnd) < 0) + { + ///instead of ikcp_ack_push + acklist.Enqueue((sn, ts)); + + if (Itimediff(sn, rcv_nxt) >= 0) + { + var seg = SegmentManager.Alloc((int)length); + seg.conv = conv_; + seg.cmd = cmd; + seg.frg = frg; + seg.wnd = wnd; + seg.ts = ts; + seg.sn = sn; + seg.una = una; + //seg.len = length; 长度在分配时确定，不能改变 + + if (length > 0) + { + span.Slice(offset, (int)length).CopyTo(seg.data); + } + + Parse_data(seg); + } + } + } + else if (IKCP_CMD_WASK == cmd) + { + // ready to send back IKCP_CMD_WINS in Ikcp_flush + // tell remote my window size + probe |= IKCP_ASK_TELL; + + if (CanLog(KcpLogMask.IKCP_LOG_IN_PROBE)) + { + LogWriteLine($"input probe", KcpLogMask.IKCP_LOG_IN_PROBE.ToString()); + } + } + else if (IKCP_CMD_WINS == cmd) + { + // do nothing + if (CanLog(KcpLogMask.IKCP_LOG_IN_WINS)) + { + LogWriteLine($"input wins: {wnd}", KcpLogMask.IKCP_LOG_IN_WINS.ToString()); + } + } + else + { + return -3; + } + + offset += (int)length; + } + + if (flag != 0) + { + Parse_fastack(maxack, latest_ts); + } + + if (Itimediff(this.snd_una, prev_una) > 0) + { + if (cwnd < rmt_wnd) + { + if (cwnd < ssthresh) + { + cwnd++; + incr += mss; + } + else + { + if (incr < mss) + { + incr = mss; + } + incr += (mss * mss) / incr + (mss / 16); + if ((cwnd + 1) * mss <= incr) + { +#if true + cwnd = (incr + mss - 1) / ((mss > 0) ? mss : 1); +#else + cwnd++; +#endif + } + } + if (cwnd > rmt_wnd) + { + cwnd = rmt_wnd; + incr = rmt_wnd * mss; + } + } + } + + return 0; + } + + /// + /// + /// + /// + /// + public int Input(ReadOnlySequence span) + { + if (CheckDispose()) + { + //检查释放 + return -4; + } + + if (CanLog(KcpLogMask.IKCP_LOG_INPUT)) + { + LogWriteLine($"[RI] {span.Length} bytes", KcpLogMask.IKCP_LOG_INPUT.ToString()); + } + + if (span.Length < IKCP_OVERHEAD) + { + return -1; + } + + uint prev_una = snd_una; + var offset = 0; + int flag = 0; + uint maxack = 0; + uint latest_ts = 0; + while (true) + { + uint ts = 0; + uint sn = 0; + uint length = 0; + uint una = 0; + uint conv_ = 0; + ushort wnd = 0; + byte cmd = 0; + byte frg = 0; + + if (span.Length - offset < IKCP_OVERHEAD) + { + break; + } + + Span header = stackalloc byte[24]; + span.Slice(offset, 24).CopyTo(header); + offset += ReadHeader(header, + ref conv_, + ref cmd, + ref frg, + ref wnd, + ref ts, + ref sn, + ref una, + ref length); + + if (conv != conv_) + { + return -1; + } + + if (span.Length - offset < length || (int)length < 0) + { + return -2; + } + + switch (cmd) + { + case IKCP_CMD_PUSH: + case IKCP_CMD_ACK: + case IKCP_CMD_WASK: + case IKCP_CMD_WINS: + break; + default: + return -3; + } + + rmt_wnd = wnd; + Parse_una(una); + Shrink_buf(); + + if (IKCP_CMD_ACK == cmd) + { + if (Itimediff(current, ts) >= 0) + { + Update_ack(Itimediff(current, ts)); + } + Parse_ack(sn); + Shrink_buf(); + + if (flag == 0) + { + flag = 1; + maxack = sn; + latest_ts = ts; + } + else if (Itimediff(sn, maxack) > 0) + { +#if !IKCP_FASTACK_CONSERVE + maxack = sn; + latest_ts = ts; +#else + if (Itimediff(ts, latest_ts) > 0) + { + maxack = sn; + latest_ts = ts; + } +#endif + } + + + if (CanLog(KcpLogMask.IKCP_LOG_IN_ACK)) + { + LogWriteLine($"input ack: sn={sn} rtt={Itimediff(current, ts)} rto={rx_rto}", KcpLogMask.IKCP_LOG_IN_ACK.ToString()); + } + } + else if (IKCP_CMD_PUSH == cmd) + { + if (CanLog(KcpLogMask.IKCP_LOG_IN_DATA)) + { + LogWriteLine($"input psh: sn={sn} ts={ts}", KcpLogMask.IKCP_LOG_IN_DATA.ToString()); + } + + if (Itimediff(sn, rcv_nxt + rcv_wnd) < 0) + { + ///instead of ikcp_ack_push + acklist.Enqueue((sn, ts)); + + if (Itimediff(sn, rcv_nxt) >= 0) + { + var seg = SegmentManager.Alloc((int)length); + seg.conv = conv_; + seg.cmd = cmd; + seg.frg = frg; + seg.wnd = wnd; + seg.ts = ts; + seg.sn = sn; + seg.una = una; + //seg.len = length; 长度在分配时确定，不能改变 + + if (length > 0) + { + span.Slice(offset, (int)length).CopyTo(seg.data); + } + + Parse_data(seg); + } + } + } + else if (IKCP_CMD_WASK == cmd) + { + // ready to send back IKCP_CMD_WINS in Ikcp_flush + // tell remote my window size + probe |= IKCP_ASK_TELL; + + if (CanLog(KcpLogMask.IKCP_LOG_IN_PROBE)) + { + LogWriteLine($"input probe", KcpLogMask.IKCP_LOG_IN_PROBE.ToString()); + } + } + else if (IKCP_CMD_WINS == cmd) + { + // do nothing + if (CanLog(KcpLogMask.IKCP_LOG_IN_WINS)) + { + LogWriteLine($"input wins: {wnd}", KcpLogMask.IKCP_LOG_IN_WINS.ToString()); + } + } + else + { + return -3; + } + + offset += (int)length; + } + + if (flag != 0) + { + Parse_fastack(maxack, latest_ts); + } + + if (Itimediff(this.snd_una, prev_una) > 0) + { + if (cwnd < rmt_wnd) + { + if (cwnd < ssthresh) + { + cwnd++; + incr += mss; + } + else + { + if (incr < mss) + { + incr = mss; + } + incr += (mss * mss) / incr + (mss / 16); + if ((cwnd + 1) * mss <= incr) + { +#if true + cwnd = (incr + mss - 1) / ((mss > 0) ? mss : 1); +#else + cwnd++; +#endif + } + } + if (cwnd > rmt_wnd) + { + cwnd = rmt_wnd; + incr = rmt_wnd * mss; + } + } + } + + return 0; + } + + public static int ReadHeader(ReadOnlySpan header, + ref uint conv_, + ref byte cmd, + ref byte frg, + ref ushort wnd, + ref uint ts, + ref uint sn, + ref uint una, + ref uint length) + { + var offset = 0; + if (IsLittleEndian) + { + conv_ = BinaryPrimitives.ReadUInt32LittleEndian(header.Slice(offset)); + offset += 4; + + cmd = header[offset]; + offset += 1; + frg = header[offset]; + offset += 1; + wnd = BinaryPrimitives.ReadUInt16LittleEndian(header.Slice(offset)); + offset += 2; + + ts = BinaryPrimitives.ReadUInt32LittleEndian(header.Slice(offset)); + offset += 4; + sn = BinaryPrimitives.ReadUInt32LittleEndian(header.Slice(offset)); + offset += 4; + una = BinaryPrimitives.ReadUInt32LittleEndian(header.Slice(offset)); + offset += 4; + length = BinaryPrimitives.ReadUInt32LittleEndian(header.Slice(offset)); + offset += 4; + } + else + { + conv_ = BinaryPrimitives.ReadUInt32BigEndian(header.Slice(offset)); + offset += 4; + cmd = header[offset]; + offset += 1; + frg = header[offset]; + offset += 1; + wnd = BinaryPrimitives.ReadUInt16BigEndian(header.Slice(offset)); + offset += 2; + + ts = BinaryPrimitives.ReadUInt32BigEndian(header.Slice(offset)); + offset += 4; + sn = BinaryPrimitives.ReadUInt32BigEndian(header.Slice(offset)); + offset += 4; + una = BinaryPrimitives.ReadUInt32BigEndian(header.Slice(offset)); + offset += 4; + length = BinaryPrimitives.ReadUInt32BigEndian(header.Slice(offset)); + offset += 4; + } + + + return offset; + } + } +} diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs.meta new file mode 100644 index 00000000..cd9858f7 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpCore.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: fcc0172c723e55a4389ad2f62b68a3fe +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs new file mode 100644 index 00000000..bfc6cea0 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs @@ -0,0 +1,262 @@ +using System.Buffers; +using System.Collections.Generic; +using System.Threading.Tasks; +using Cysharp.Threading.Tasks; +using BufferOwner = System.Buffers.IMemoryOwner; + +namespace System.Net.Sockets.Kcp +{ + /// + /// + /// 这是个简单的实现,更复杂使用微软官方实现 + /// + /// + internal class QueuePipe : Queue + { + readonly object _innerLock = new object(); + private TaskCompletionSource source; + + //线程同步上下文由Task机制保证，无需额外处理 + //SynchronizationContext callbackContext; + //public bool UseSynchronizationContext { get; set; } = true; + + public virtual void Write(T item) + { + lock (_innerLock) + { + if (source == null) + { + Enqueue(item); + } + else + { + if (Count > 0) + { + throw new Exception("内部顺序错误，不应该出现，请联系作者"); + } + + var next = source; + source = null; + next.TrySetResult(item); + } + } + } + + public new void Enqueue(T item) + { + lock (_innerLock) + { + base.Enqueue(item); + } + } + + public void Flush() + { + lock (_innerLock) + { + if (Count > 0) + { + var res = Dequeue(); + var next = source; + source = null; + next?.TrySetResult(res); + } + } + } + + public virtual Task ReadAsync() + { + lock (_innerLock) + { + if (this.Count > 0) + { + var next = Dequeue(); + return Task.FromResult(next); + } + else + { + source = new TaskCompletionSource(); + return source.Task; + } + } + } + + public UniTask ReadValueTaskAsync() + { + throw new NotImplementedException(); + } + } + + public class KcpIO : KcpCore, IKcpIO + where Segment : IKcpSegment + { + OutputQ outq; + + public KcpIO(uint conv_) : base(conv_) + { + outq = new OutputQ(); + callbackHandle = outq; + } + + internal override void Parse_data(Segment newseg) + { + base.Parse_data(newseg); + + lock (rcv_queueLock) + { + var recover = false; + if (rcv_queue.Count >= rcv_wnd) + { + recover = true; + } + + while (TryRecv(out var arraySegment) > 0) + { + recvSignal.Enqueue(arraySegment); + } + + recvSignal.Flush(); + + #region fast recover + + /// fast recover + if (rcv_queue.Count < rcv_wnd && recover) + { + // ready to send back IKCP_CMD_WINS in ikcp_flush + // tell remote my window size + probe |= IKCP_ASK_TELL; + } + + #endregion + } + } + + QueuePipe> recvSignal = new QueuePipe>(); + + internal int TryRecv(out ArraySegment package) + { + package = default; + lock (rcv_queueLock) + { + var peekSize = -1; + if (rcv_queue.Count == 0) + { + ///没有可用包 + return -1; + } + + var seq = rcv_queue[0]; + + if (seq.frg == 0) + { + peekSize = (int)seq.len; + } + + if (rcv_queue.Count < seq.frg + 1) + { + ///没有足够的包 + return -1; + } + + uint length = 0; + + Segment[] kcpSegments = ArrayPool.Shared.Rent(seq.frg + 1); + + var index = 0; + foreach (var item in rcv_queue) + { + kcpSegments[index] = item; + index++; + length += item.len; + if (item.frg == 0) + { + break; + } + } + + if (index > 0) + { + rcv_queue.RemoveRange(0, index); + } + + package = new ArraySegment(kcpSegments, 0, index); + + peekSize = (int)length; + + if (peekSize <= 0) + { + return -2; + } + + return peekSize; + } + } + + public async UniTask RecvAsync(IBufferWriter writer, object options = null) + { + var arraySegment = await recvSignal.ReadAsync().ConfigureAwait(false); + for (int i = arraySegment.Offset; i < arraySegment.Count; i++) + { + WriteRecv(writer, arraySegment.Array[i]); + } + + ArrayPool.Shared.Return(arraySegment.Array, true); + } + + private void WriteRecv(IBufferWriter writer, Segment seg) + { + var curCount = (int)seg.len; + var target = writer.GetSpan(curCount); + seg.data.CopyTo(target); + SegmentManager.Free(seg); + writer.Advance(curCount); + } + + public async UniTask RecvAsync(ArraySegment buffer, object options = null) + { + var arraySegment = await recvSignal.ReadAsync().ConfigureAwait(false); + int start = buffer.Offset; + for (int i = arraySegment.Offset; i < arraySegment.Count; i++) + { + var target = new Memory(buffer.Array, start, buffer.Array.Length - start); + + var seg = arraySegment.Array[i]; + seg.data.CopyTo(target.Span); + start += seg.data.Length; + + SegmentManager.Free(seg); + } + + ArrayPool.Shared.Return(arraySegment.Array, true); + return start - buffer.Offset; + } + + public async UniTask OutputAsync(IBufferWriter writer, object options = null) + { + var (Owner, Count) = await outq.ReadAsync().ConfigureAwait(false); + WriteOut(writer, Owner, Count); + } + + private static void WriteOut(IBufferWriter writer, BufferOwner Owner, int Count) + { + var target = writer.GetSpan(Count); + Owner.Memory.Span.Slice(0, Count).CopyTo(target); + writer.Advance(Count); + Owner.Dispose(); + } + + protected internal override BufferOwner CreateBuffer(int needSize) + { + return MemoryPool.Shared.Rent(needSize); + } + + internal class OutputQ : QueuePipe<(BufferOwner Owner, int Count)>, + IKcpCallback + { + public void Output(BufferOwner buffer, int avalidLength) + { + Write((buffer, avalidLength)); + } + } + } +} \ No newline at end of file diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs.meta new file mode 100644 index 00000000..5aa66275 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpIO.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: 3c30d30fa46372948b60bd56eec47fe6 +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs new file mode 100644 index 00000000..b850bdf3 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs @@ -0,0 +1,50 @@ +using System.Buffers; + +namespace System.Net.Sockets.Kcp +{ + public abstract class KcpOutputWriter : IKcpOutputWriter + { + public int UnflushedBytes { get; set; } + public IMemoryOwner MemoryOwner { get; set; } + public void Flush() + { + Output(MemoryOwner, UnflushedBytes); + MemoryOwner = null; + UnflushedBytes = 0; + } + + public void Advance(int count) + { + UnflushedBytes += count; + } + + public Memory GetMemory(int sizeHint = 0) + { + if (MemoryOwner == null) + { + MemoryOwner = MemoryPool.Shared.Rent(2048); + } + return MemoryOwner.Memory.Slice(UnflushedBytes); + } + + public Span GetSpan(int sizeHint = 0) + { + if (MemoryOwner == null) + { + MemoryOwner = MemoryPool.Shared.Rent(2048); + } + return MemoryOwner.Memory.Span.Slice(UnflushedBytes); + } + + /// + /// Socket发送是要pin byte[],为了不阻塞KcpFlush，动态缓存是必须的。 + /// + /// + /// + public abstract void Output(IMemoryOwner buffer, int avalidLength); + } +} + + + + diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs.meta new file mode 100644 index 00000000..0c610af5 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpOutputWriter.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: a058d8fa8a92dc94395bfd6e1f6fdb8f +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs new file mode 100644 index 00000000..71402217 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs @@ -0,0 +1,402 @@ +using System.Buffers.Binary; +using System.Runtime.InteropServices; + +namespace System.Net.Sockets.Kcp +{ + /// + /// 调整了没存布局，直接拷贝块提升性能。 + /// 结构体保存内容只有一个指针，不用担心参数传递过程中的性能 + /// https://github.com/skywind3000/kcp/issues/118#issuecomment-338133930 + /// 不要对没有初始化的KcpSegment(内部指针为0，所有属性都将指向位置区域) 进行任何赋值操作，可能导致内存损坏。 + /// 出于性能考虑，没有对此项进行安全检查。 + /// + public struct KcpSegment : IKcpSegment + { + internal readonly unsafe byte* ptr; + public unsafe KcpSegment(byte* intPtr, uint appendDateSize) + { + this.ptr = intPtr; + len = appendDateSize; + } + + /// + /// 使用完必须显示释放，否则内存泄漏 + /// + /// + /// + public static KcpSegment AllocHGlobal(int appendDateSize) + { + var total = LocalOffset + HeadOffset + appendDateSize; + IntPtr intPtr = Marshal.AllocHGlobal(total); + unsafe + { + ///清零 不知道是不是有更快的清0方法？ + Span span = new Span(intPtr.ToPointer(), total); + span.Clear(); + + return new KcpSegment((byte*)intPtr.ToPointer(), (uint)appendDateSize); + } + } + + /// + /// 释放非托管内存 + /// + /// + public static void FreeHGlobal(KcpSegment seg) + { + unsafe + { + Marshal.FreeHGlobal((IntPtr)seg.ptr); + } + } + + /// 以下为本机使用的参数 + /// + /// offset = 0 + /// + public uint resendts + { + get + { + unsafe + { + return *(uint*)(ptr + 0); + } + } + set + { + unsafe + { + *(uint*)(ptr + 0) = value; + } + } + } + + /// + /// offset = 4 + /// + public uint rto + { + get + { + unsafe + { + return *(uint*)(ptr + 4); + } + } + set + { + unsafe + { + *(uint*)(ptr + 4) = value; + } + } + } + + /// + /// offset = 8 + /// + public uint fastack + { + get + { + unsafe + { + return *(uint*)(ptr + 8); + } + } + set + { + unsafe + { + *(uint*)(ptr + 8) = value; + } + } + } + + /// + /// offset = 12 + /// + public uint xmit + { + get + { + unsafe + { + return *(uint*)(ptr + 12); + } + } + set + { + unsafe + { + *(uint*)(ptr + 12) = value; + } + } + } + + ///以下为需要网络传输的参数 + public const int LocalOffset = 4 * 4; + public const int HeadOffset = KcpConst.IKCP_OVERHEAD; + + /// + /// offset = + /// + /// https://github.com/skywind3000/kcp/issues/134 + public uint conv + { + get + { + unsafe + { + return *(uint*)(LocalOffset + 0 + ptr); + } + } + set + { + unsafe + { + *(uint*)(LocalOffset + 0 + ptr) = value; + } + } + } + + /// + /// offset = + 4 + /// + public byte cmd + { + get + { + unsafe + { + return *(LocalOffset + 4 + ptr); + } + } + set + { + unsafe + { + *(LocalOffset + 4 + ptr) = value; + } + } + } + + /// + /// offset = + 5 + /// + public byte frg + { + get + { + unsafe + { + return *(LocalOffset + 5 + ptr); + } + } + set + { + unsafe + { + *(LocalOffset + 5 + ptr) = value; + } + } + } + + /// + /// offset = + 6 + /// + public ushort wnd + { + get + { + unsafe + { + return *(ushort*)(LocalOffset + 6 + ptr); + } + } + set + { + unsafe + { + *(ushort*)(LocalOffset + 6 + ptr) = value; + } + } + } + + /// + /// offset = + 8 + /// + public uint ts + { + get + { + unsafe + { + return *(uint*)(LocalOffset + 8 + ptr); + } + } + set + { + unsafe + { + *(uint*)(LocalOffset + 8 + ptr) = value; + } + } + } + + /// + /// SendNumber? + /// offset = + 12 + /// + public uint sn + { + get + { + unsafe + { + return *(uint*)(LocalOffset + 12 + ptr); + } + } + set + { + unsafe + { + *(uint*)(LocalOffset + 12 + ptr) = value; + } + } + } + + /// + /// offset = + 16 + /// + public uint una + { + get + { + unsafe + { + return *(uint*)(LocalOffset + 16 + ptr); + } + } + set + { + unsafe + { + *(uint*)(LocalOffset + 16 + ptr) = value; + } + } + } + + /// + /// AppendDateSize + /// offset = + 20 + /// + public uint len + { + get + { + unsafe + { + return *(uint*)(LocalOffset + 20 + ptr); + } + } + private set + { + unsafe + { + *(uint*)(LocalOffset + 20 + ptr) = value; + } + } + } + + /// + /// + /// + /// https://github.com/skywind3000/kcp/issues/35#issuecomment-263770736 + public Span data + { + get + { + unsafe + { + return new Span(LocalOffset + HeadOffset + ptr, (int)len); + } + } + } + + + + /// + /// 将片段中的要发送的数据拷贝到指定缓冲区 + /// + /// + /// + public int Encode(Span buffer) + { + var datelen = (int)(HeadOffset + len); + + ///备用偏移值 现阶段没有使用 + const int offset = 0; + + if (KcpConst.IsLittleEndian) + { + if (BitConverter.IsLittleEndian) + { + ///小端可以一次拷贝 + unsafe + { + ///要发送的数据从LocalOffset开始。 + ///本结构体调整了要发送字段和单机使用字段的位置，让报头数据和数据连续，节约一次拷贝。 + Span sendDate = new Span(ptr + LocalOffset, datelen); + sendDate.CopyTo(buffer); + } + } + else + { + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset), conv); + buffer[offset + 4] = cmd; + buffer[offset + 5] = frg; + BinaryPrimitives.WriteUInt16LittleEndian(buffer.Slice(offset + 6), wnd); + + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 8), ts); + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 12), sn); + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 16), una); + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 20), len); + + data.CopyTo(buffer.Slice(HeadOffset)); + } + } + else + { + if (BitConverter.IsLittleEndian) + { + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset), conv); + buffer[offset + 4] = cmd; + buffer[offset + 5] = frg; + BinaryPrimitives.WriteUInt16BigEndian(buffer.Slice(offset + 6), wnd); + + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 8), ts); + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 12), sn); + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 16), una); + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 20), len); + + data.CopyTo(buffer.Slice(HeadOffset)); + } + else + { + ///大端可以一次拷贝 + unsafe + { + ///要发送的数据从LocalOffset开始。 + ///本结构体调整了要发送字段和单机使用字段的位置，让报头数据和数据连续，节约一次拷贝。 + Span sendDate = new Span(ptr + LocalOffset, datelen); + sendDate.CopyTo(buffer); + } + } + } + + return datelen; + } + } +} diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs.meta new file mode 100644 index 00000000..2e5b4568 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpSegment.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: daab08fc1f00355429c23a1e36993942 +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpTrace.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpTrace.cs new file mode 100644 index 00000000..f288cb52 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpTrace.cs @@ -0,0 +1,79 @@ +using System; +using System.Collections.Generic; +using System.Text; + +namespace System.Net.Sockets.Kcp +{ + public partial class KcpCore + { + public KcpLogMask LogMask { get; set; } = KcpLogMask.IKCP_LOG_PARSE_DATA | KcpLogMask.IKCP_LOG_NEED_SEND | KcpLogMask.IKCP_LOG_DEAD_LINK; + + public virtual bool CanLog(KcpLogMask mask) + { + if ((mask & LogMask) == 0) + { + return false; + } + +#if NETSTANDARD2_0_OR_GREATER || NET5_0_OR_GREATER + if (TraceListener != null) + { + return true; + } +#endif + return false; + } + +#if NETSTANDARD2_0_OR_GREATER || NET5_0_OR_GREATER + public System.Diagnostics.TraceListener TraceListener { get; set; } +#endif + + public virtual void LogFail(string message) + { +#if NETSTANDARD2_0_OR_GREATER || NET5_0_OR_GREATER + TraceListener?.Fail(message); +#endif + } + + public virtual void LogWriteLine(string message, string category) + { +#if NETSTANDARD2_0_OR_GREATER || NET5_0_OR_GREATER + TraceListener?.WriteLine(message, category); +#endif + } + + [Obsolete("一定要先判断CanLog 内部判断是否存在TraceListener,避免在没有TraceListener时生成字符串", true)] + public virtual void LogWriteLine(string message, KcpLogMask mask) + { +#if NETSTANDARD2_0_OR_GREATER || NET5_0_OR_GREATER + if (CanLog(mask)) + { + LogWriteLine(message, mask.ToString()); + } +#endif + } + } + + [Flags] + public enum KcpLogMask + { + IKCP_LOG_OUTPUT = 1 << 0, + IKCP_LOG_INPUT = 1 << 1, + IKCP_LOG_SEND = 1 << 2, + IKCP_LOG_RECV = 1 << 3, + IKCP_LOG_IN_DATA = 1 << 4, + IKCP_LOG_IN_ACK = 1 << 5, + IKCP_LOG_IN_PROBE = 1 << 6, + IKCP_LOG_IN_WINS = 1 << 7, + IKCP_LOG_OUT_DATA = 1 << 8, + IKCP_LOG_OUT_ACK = 1 << 9, + IKCP_LOG_OUT_PROBE = 1 << 10, + IKCP_LOG_OUT_WINS = 1 << 11, + + IKCP_LOG_PARSE_DATA = 1 << 12, + IKCP_LOG_NEED_SEND = 1 << 13, + IKCP_LOG_DEAD_LINK = 1 << 14, + } +} + + diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpTrace.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpTrace.cs.meta new file mode 100644 index 00000000..3841d0aa --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/KcpTrace.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: 39791b0c45bf4864e87385c477d9b50c +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SegManager.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SegManager.cs new file mode 100644 index 00000000..c18a22d7 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SegManager.cs @@ -0,0 +1,265 @@ +using System.Runtime.InteropServices; +using System.Collections.Generic; +using System.Collections.Concurrent; +using System.Buffers.Binary; + +namespace System.Net.Sockets.Kcp +{ + /// + /// 动态申请非托管内存 + /// + public class SimpleSegManager : ISegmentManager + { + public static SimpleSegManager Default { get; } = new SimpleSegManager(); + public KcpSegment Alloc(int appendDateSize) + { + return KcpSegment.AllocHGlobal(appendDateSize); + } + + public void Free(KcpSegment seg) + { + KcpSegment.FreeHGlobal(seg); + } + + public class Kcp : Kcp + { + public Kcp(uint conv_, IKcpCallback callback, IRentable rentable = null) + : base(conv_, callback, rentable) + { + SegmentManager = Default; + } + } + + public class KcpIO : KcpIO + { + public KcpIO(uint conv_) + : base(conv_) + { + SegmentManager = Default; + } + } + } + + /// + /// 申请固定大小非托管内存。使用这个就不能SetMtu了，大小已经写死。 + /// + /// 需要大量测试 + public unsafe class UnSafeSegManager : ISegmentManager + { + public static UnSafeSegManager Default { get; } = new UnSafeSegManager(); + /// + /// 因为默认mtu是1400，并且内存需要内存行/内存页对齐。这里直接512对齐。 + /// + public const int blockSize = 512 * 3; + public HashSet header = new HashSet(); + public Stack blocks = new Stack(); + public readonly object locker = new object(); + public UnSafeSegManager() + { + Alloc(); + } + + void Alloc() + { + int count = 50; + IntPtr intPtr = Marshal.AllocHGlobal(blockSize * count); + header.Add(intPtr); + for (int i = 0; i < count; i++) + { + blocks.Push(intPtr + blockSize * i); + } + } + + ~UnSafeSegManager() + { + foreach (var item in header) + { + Marshal.FreeHGlobal(item); + } + } + + public KcpSegment Alloc(int appendDateSize) + { + lock (locker) + { + var total = KcpSegment.LocalOffset + KcpSegment.HeadOffset + appendDateSize; + if (total > blockSize) + { + throw new ArgumentOutOfRangeException(); + } + + if (blocks.Count > 0) + { + + } + else + { + Alloc(); + } + + var ptr = blocks.Pop(); + Span span = new Span(ptr.ToPointer(), blockSize); + span.Clear(); + return new KcpSegment((byte*)ptr.ToPointer(), (uint)appendDateSize); + } + } + + public void Free(KcpSegment seg) + { + IntPtr ptr = (IntPtr)seg.ptr; + blocks.Push(ptr); + } + + public class Kcp : Kcp + { + public Kcp(uint conv_, IKcpCallback callback, IRentable rentable = null) + : base(conv_, callback, rentable) + { + SegmentManager = Default; + } + } + + public class KcpIO : KcpIO + { + public KcpIO(uint conv_) + : base(conv_) + { + SegmentManager = Default; + } + } + } + + + /// + /// 使用内存池，而不是非托管内存，有内存alloc，但是不多。可以解决Marshal.AllocHGlobal 内核调用带来的性能问题 + /// + public class PoolSegManager : ISegmentManager + { + public static PoolSegManager Default { get; } = new PoolSegManager(); + + /// + /// 因为默认mtu是1400，并且内存需要内存行/内存页对齐。这里直接512对齐。 + /// + public const int blockSize = 512 * 3; + public class Seg : IKcpSegment + { + byte[] cache; + public Seg(int blockSize) + { + cache = Buffers.ArrayPool.Shared.Rent(blockSize); + } + + ///以下为需要网络传输的参数 + public const int LocalOffset = 4 * 4; + public const int HeadOffset = Kcp.IKCP_OVERHEAD; + + public byte cmd { get; set; } + public uint conv { get; set; } + public Span data => cache.AsSpan().Slice(0, (int)len); + public uint fastack { get; set; } + public byte frg { get; set; } + public uint len { get; internal set; } + public uint resendts { get; set; } + public uint rto { get; set; } + public uint sn { get; set; } + public uint ts { get; set; } + public uint una { get; set; } + public ushort wnd { get; set; } + public uint xmit { get; set; } + + public int Encode(Span buffer) + { + var datelen = (int)(HeadOffset + len); + + ///备用偏移值 现阶段没有使用 + const int offset = 0; + + if (BitConverter.IsLittleEndian) + { + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset), conv); + buffer[offset + 4] = cmd; + buffer[offset + 5] = frg; + BinaryPrimitives.WriteUInt16LittleEndian(buffer.Slice(offset + 6), wnd); + + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 8), ts); + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 12), sn); + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 16), una); + BinaryPrimitives.WriteUInt32LittleEndian(buffer.Slice(offset + 20), len); + + data.CopyTo(buffer.Slice(HeadOffset)); + } + else + { + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset), conv); + buffer[offset + 4] = cmd; + buffer[offset + 5] = frg; + BinaryPrimitives.WriteUInt16BigEndian(buffer.Slice(offset + 6), wnd); + + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 8), ts); + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 12), sn); + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 16), una); + BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(offset + 20), len); + + data.CopyTo(buffer.Slice(HeadOffset)); + } + + return datelen; + } + } + ConcurrentStack Pool = new ConcurrentStack(); + public Seg Alloc(int appendDateSize) + { + if (appendDateSize > blockSize) + { + throw new NotSupportedException(); + } + if (Pool.TryPop(out var ret)) + { + } + else + { + ret = new Seg(blockSize); + } + ret.len = (uint)appendDateSize; + return ret; + } + + public void Free(Seg seg) + { + seg.cmd = 0; + seg.conv = 0; + seg.fastack = 0; + seg.frg = 0; + seg.len = 0; + seg.resendts = 0; + seg.rto = 0; + seg.sn = 0; + seg.ts = 0; + seg.una = 0; + seg.wnd = 0; + seg.xmit = 0; + Pool.Push(seg); + } + + public class Kcp : Kcp + { + public Kcp(uint conv_, IKcpCallback callback, IRentable rentable = null) + : base(conv_, callback, rentable) + { + SegmentManager = Default; + } + } + + public class KcpIO : KcpIO + { + public KcpIO(uint conv_) + : base(conv_) + { + SegmentManager = Default; + } + } + } +} + + + diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SegManager.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SegManager.cs.meta new file mode 100644 index 00000000..0d200168 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SegManager.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: e7f0d71aa1362b6488c3173d525fd284 +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpClient.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpClient.cs new file mode 100644 index 00000000..f4c5399e --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpClient.cs @@ -0,0 +1,65 @@ +using System.Buffers; +using System.Threading.Tasks; +using Cysharp.Threading.Tasks; + +namespace System.Net.Sockets.Kcp.Simple +{ + /// + /// 简单例子。 + /// + public class SimpleKcpClient : IKcpCallback + { + UdpClient client; + + public SimpleKcpClient(int port) + : this(port, null) + { + + } + + public SimpleKcpClient(int port, IPEndPoint endPoint) + { + client = new UdpClient(port); + kcp = new SimpleSegManager.Kcp(2001, this); + this.EndPoint = endPoint; + BeginRecv(); + } + + public SimpleSegManager.Kcp kcp { get; } + public IPEndPoint EndPoint { get; set; } + + public void Output(IMemoryOwner buffer, int avalidLength) + { + var s = buffer.Memory.Span.Slice(0, avalidLength).ToArray(); + client.SendAsync(s, s.Length, EndPoint); + buffer.Dispose(); + } + + public async void SendAsync(byte[] datagram, int bytes) + { + kcp.Send(datagram.AsSpan().Slice(0, bytes)); + } + + public async UniTask ReceiveAsync() + { + var (buffer, avalidLength) = kcp.TryRecv(); + while (buffer == null) + { + await Task.Delay(10); + (buffer, avalidLength) = kcp.TryRecv(); + } + + var s = buffer.Memory.Span.Slice(0, avalidLength).ToArray(); + return s; + } + + private async void BeginRecv() + { + var res = await client.ReceiveAsync(); + EndPoint = res.RemoteEndPoint; + kcp.Input(res.Buffer); + BeginRecv(); + } + } +} + diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpClient.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpClient.cs.meta new file mode 100644 index 00000000..530afc3c --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpClient.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: ff16ed9b89525df4aa6501c0edc679d5 +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpServer.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpServer.cs new file mode 100644 index 00000000..e1ad21f1 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpServer.cs @@ -0,0 +1,48 @@ +using System.Net.Sockets.Kcp.Simple; +using System.Threading.Tasks; + +namespace System.Net.Sockets.Kcp +{ + namespace TestServer + { + /// + /// 简单例子。 + /// + class SimpleKcpServer + { + static void Main(string[] args) + { + Console.WriteLine("Hello World!"); + + SimpleKcpClient kcpClient = new SimpleKcpClient(40001); + Task.Run(async () => + { + while (true) + { + kcpClient.kcp.Update(DateTimeOffset.UtcNow); + await Task.Delay(10); + } + }); + + StartRecv(kcpClient); + Console.ReadLine(); + } + + static async void StartRecv(SimpleKcpClient client) + { + while (true) + { + var res = await client.ReceiveAsync(); + var str = System.Text.Encoding.UTF8.GetString(res); + if ("发送一条消息" == str) + { + Console.WriteLine(str); + + var buffer = System.Text.Encoding.UTF8.GetBytes("回复一条消息"); + client.SendAsync(buffer, buffer.Length); + } + } + } + } + } +} \ No newline at end of file diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpServer.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpServer.cs.meta new file mode 100644 index 00000000..878b81d5 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/SimpleKcpServer.cs.meta @@ -0,0 +1,3 @@ +fileFormatVersion: 2 +guid: 97e221b7388e412da59b0f4d200cb891 +timeCreated: 1682095200 \ No newline at end of file diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Utility.cs b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Utility.cs new file mode 100644 index 00000000..601a862f --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Utility.cs @@ -0,0 +1,73 @@ +using System; +using System.Buffers; +using System.Collections.Generic; +using System.Runtime.CompilerServices; +using System.Text; + +//[assembly: InternalsVisibleTo("UnitTestProject1")] + +namespace System.Net.Sockets.Kcp +{ + public static class KcpExtension_FDF71D0BC31D49C48EEA8FAA51F017D4 + { + private static readonly DateTime utc_time = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc); + [Obsolete("", true)] + [MethodImpl(MethodImplOptions.AggressiveInlining)] + public static uint ConvertTime(this in DateTime time) + { + return (uint)(Convert.ToInt64(time.Subtract(utc_time).TotalMilliseconds) & 0xffffffff); + } + + private static readonly DateTimeOffset utc1970 = new DateTimeOffset(1970, 1, 1, 0, 0, 0, TimeSpan.Zero); + [MethodImpl(MethodImplOptions.AggressiveInlining)] + public static uint ConvertTimeOld(this in DateTimeOffset time) + { + return (uint)(Convert.ToInt64(time.Subtract(utc1970).TotalMilliseconds) & 0xffffffff); + } + + [MethodImpl(MethodImplOptions.AggressiveInlining)] + public static uint ConvertTime2(this in DateTimeOffset time) + { +#if NETSTANDARD2_0_OR_GREATER || NET5_0_OR_GREATER + return (uint)(time.ToUnixTimeMilliseconds() & 0xffffffff); +#else + return (uint)(Convert.ToInt64(time.Subtract(utc1970).TotalMilliseconds) & 0xffffffff); +#endif + } + + [MethodImpl(MethodImplOptions.AggressiveInlining)] + public static uint ConvertTime(this in DateTimeOffset time) + { +#if NETSTANDARD2_0_OR_GREATER || NET5_0_OR_GREATER + return (uint)(time.ToUnixTimeMilliseconds()); +#else + return (uint)(Convert.ToInt64(time.Subtract(utc1970).TotalMilliseconds) & 0xffffffff); +#endif + } + + [MethodImpl(MethodImplOptions.AggressiveInlining)] + public static string ToLogString(this T segment, bool local = false) + where T : IKcpSegment + { + if (local) + { + return $"sn:{segment.sn,2} una:{segment.una,2} frg:{segment.frg,2} cmd:{segment.cmd,2} len:{segment.len,2} wnd:{segment.wnd} [ LocalValue: xmit:{segment.xmit} fastack:{segment.fastack} rto:{segment.rto} ]"; + } + else + { + return $"sn:{segment.sn,2} una:{segment.una,2} frg:{segment.frg,2} cmd:{segment.cmd,2} len:{segment.len,2} wnd:{segment.wnd}"; + } + } + + [MethodImpl(MethodImplOptions.AggressiveInlining)] + public static int Encode(this T Seg, IBufferWriter writer) + where T : IKcpSegment + { + var totalLength = (int)(KcpSegment.HeadOffset + Seg.len); + var span = writer.GetSpan(totalLength); + Seg.Encode(span); + writer.Advance(totalLength); + return totalLength; + } + } +} diff --git a/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Utility.cs.meta b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Utility.cs.meta new file mode 100644 index 00000000..be197e63 --- /dev/null +++ b/Assets/TEngine/Runtime/GameFramework/Network/Kcp/Core/Utility.cs.meta @@ -0,0 +1,11 @@ +fileFormatVersion: 2 +guid: cd298c4aa310a7e448c4694ddc41337e +MonoImporter: + externalObjects: {} + serializedVersion: 2 + defaultReferences: [] + executionOrder: 0 + icon: {instanceID: 0} + userData: + assetBundleName: + assetBundleVariant: