mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-09-27 22:36:12 -04:00
apply new classes to kcp core
This commit is contained in:
v2ray
parent
aa6726a6d0
commit
d958b9884e
@ -23,19 +23,6 @@ const (
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headerSize uint32 = 2
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)
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type Command byte
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var (
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CommandData Command = 0
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CommandTerminate Command = 1
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)
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type Option byte
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var (
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OptionClose Option = 1
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)
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type ConnState byte
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var (
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@ -69,7 +56,7 @@ type Connection struct {
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}
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// NewConnection create a new KCP connection between local and remote.
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func NewConnection(conv uint32, writerCloser io.WriteCloser, local *net.UDPAddr, remote *net.UDPAddr, block Authenticator) *Connection {
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func NewConnection(conv uint16, writerCloser io.WriteCloser, local *net.UDPAddr, remote *net.UDPAddr, block Authenticator) *Connection {
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conn := new(Connection)
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conn.local = local
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conn.chReadEvent = make(chan struct{}, 1)
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@ -79,8 +66,12 @@ func NewConnection(conv uint32, writerCloser io.WriteCloser, local *net.UDPAddr,
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conn.since = nowMillisec()
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conn.writeBufferSize = effectiveConfig.WriteBuffer / effectiveConfig.Mtu
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authWriter := &AuthenticationWriter{
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Authenticator: block,
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Writer: writerCloser,
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}
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mtu := effectiveConfig.Mtu - uint32(block.HeaderSize()) - headerSize
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conn.kcp = NewKCP(conv, mtu, effectiveConfig.GetSendingWindowSize(), effectiveConfig.GetReceivingWindowSize(), conn.writeBufferSize, conn.output)
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conn.kcp = NewKCP(conv, mtu, effectiveConfig.GetSendingWindowSize(), effectiveConfig.GetReceivingWindowSize(), conn.writeBufferSize, authWriter)
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conn.kcp.NoDelay(effectiveConfig.Tti, 2, effectiveConfig.Congestion)
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conn.kcp.current = conn.Elapsed()
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@ -95,13 +86,19 @@ func (this *Connection) Elapsed() uint32 {
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// Read implements the Conn Read method.
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func (this *Connection) Read(b []byte) (int, error) {
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if this == nil || this.state == ConnStateReadyToClose || this.state == ConnStateClosed {
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if this == nil ||
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this.kcp.state == StateReadyToClose ||
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this.kcp.state == StateTerminating ||
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this.kcp.state == StateTerminated {
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return 0, io.EOF
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}
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for {
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this.RLock()
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if this.state == ConnStateReadyToClose || this.state == ConnStateClosed {
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if this == nil ||
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this.kcp.state == StateReadyToClose ||
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this.kcp.state == StateTerminating ||
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this.kcp.state == StateTerminated {
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this.RUnlock()
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return 0, io.EOF
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}
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@ -127,19 +124,14 @@ func (this *Connection) Read(b []byte) (int, error) {
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// Write implements the Conn Write method.
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func (this *Connection) Write(b []byte) (int, error) {
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if this == nil ||
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this.state == ConnStateReadyToClose ||
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this.state == ConnStatePeerClosed ||
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this.state == ConnStateClosed {
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if this == nil || this.kcp.state != StateActive {
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return 0, io.ErrClosedPipe
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}
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totalWritten := 0
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for {
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this.RLock()
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if this.state == ConnStateReadyToClose ||
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this.state == ConnStatePeerClosed ||
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this.state == ConnStateClosed {
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if this == nil || this.kcp.state != StateActive {
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this.RUnlock()
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return totalWritten, io.ErrClosedPipe
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}
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@ -166,72 +158,21 @@ func (this *Connection) Write(b []byte) (int, error) {
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}
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}
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func (this *Connection) Terminate() {
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if this == nil || this.state == ConnStateClosed {
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return
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}
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this.Lock()
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defer this.Unlock()
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if this.state == ConnStateClosed {
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return
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}
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this.state = ConnStateClosed
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this.writer.Close()
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}
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func (this *Connection) NotifyTermination() {
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for i := 0; i < 16; i++ {
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this.RLock()
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if this.state == ConnStateClosed {
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this.RUnlock()
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break
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}
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this.RUnlock()
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buffer := alloc.NewSmallBuffer().Clear()
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buffer.AppendBytes(byte(CommandTerminate), byte(OptionClose), byte(0), byte(0), byte(0), byte(0))
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this.outputBuffer(buffer)
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time.Sleep(time.Second)
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}
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this.Terminate()
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}
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func (this *Connection) ForceTimeout() {
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if this == nil {
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return
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}
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for i := 0; i < 5; i++ {
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if this.state == ConnStateClosed {
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return
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}
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time.Sleep(time.Minute)
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}
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go this.terminateOnce.Do(this.NotifyTermination)
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}
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// Close closes the connection.
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func (this *Connection) Close() error {
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if this == nil || this.state == ConnStateClosed || this.state == ConnStateReadyToClose {
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if this == nil ||
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this.kcp.state == StateReadyToClose ||
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this.kcp.state == StateTerminating ||
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this.kcp.state == StateTerminated {
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return errClosedConnection
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}
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log.Debug("KCP|Connection: Closing connection to ", this.remote)
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this.Lock()
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defer this.Unlock()
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if this.state == ConnStateActive {
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this.state = ConnStateReadyToClose
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if this.kcp.WaitSnd() == 0 {
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go this.terminateOnce.Do(this.NotifyTermination)
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} else {
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go this.ForceTimeout()
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}
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}
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if this.state == ConnStatePeerClosed {
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go this.Terminate()
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}
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this.kcpAccess.Lock()
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this.kcp.OnClose()
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this.kcpAccess.Unlock()
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return nil
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}
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@ -254,7 +195,7 @@ func (this *Connection) RemoteAddr() net.Addr {
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// SetDeadline sets the deadline associated with the listener. A zero time value disables the deadline.
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func (this *Connection) SetDeadline(t time.Time) error {
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if this == nil || this.state != ConnStateActive {
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if this == nil || this.kcp.state != StateActive {
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return errClosedConnection
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}
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this.Lock()
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@ -266,7 +207,7 @@ func (this *Connection) SetDeadline(t time.Time) error {
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// SetReadDeadline implements the Conn SetReadDeadline method.
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func (this *Connection) SetReadDeadline(t time.Time) error {
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if this == nil || this.state != ConnStateActive {
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if this == nil || this.kcp.state != StateActive {
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return errClosedConnection
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}
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this.Lock()
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@ -277,7 +218,7 @@ func (this *Connection) SetReadDeadline(t time.Time) error {
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// SetWriteDeadline implements the Conn SetWriteDeadline method.
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func (this *Connection) SetWriteDeadline(t time.Time) error {
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if this == nil || this.state != ConnStateActive {
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if this == nil || this.kcp.state != StateActive {
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return errClosedConnection
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}
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this.Lock()
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@ -286,54 +227,21 @@ func (this *Connection) SetWriteDeadline(t time.Time) error {
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return nil
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}
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func (this *Connection) outputBuffer(payload *alloc.Buffer) {
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defer payload.Release()
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if this == nil {
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return
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}
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this.RLock()
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defer this.RUnlock()
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if this.state == ConnStatePeerClosed || this.state == ConnStateClosed {
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return
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}
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this.block.Seal(payload)
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this.writer.Write(payload.Value)
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}
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func (this *Connection) output(payload []byte) {
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if this == nil || this.state == ConnStateClosed {
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return
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}
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if this.state == ConnStateReadyToClose && this.kcp.WaitSnd() == 0 {
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go this.terminateOnce.Do(this.NotifyTermination)
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}
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if len(payload) < IKCP_OVERHEAD {
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return
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}
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buffer := alloc.NewBuffer().Clear().Append(payload)
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cmd := CommandData
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opt := Option(0)
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if this.state == ConnStateReadyToClose {
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opt = OptionClose
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}
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buffer.Prepend([]byte{byte(cmd), byte(opt)})
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this.outputBuffer(buffer)
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}
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// kcp update, input loop
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func (this *Connection) updateTask() {
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for this.state != ConnStateClosed {
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for this.kcp.state != StateTerminated {
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current := this.Elapsed()
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this.kcpAccess.Lock()
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this.kcp.Update(current)
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this.kcpAccess.Unlock()
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time.Sleep(time.Duration(effectiveConfig.Tti) * time.Millisecond)
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interval := time.Duration(effectiveConfig.Tti) * time.Millisecond
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if this.kcp.state == StateTerminating {
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interval = time.Second
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}
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time.Sleep(interval)
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}
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this.Terminate()
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}
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func (this *Connection) notifyReadEvent() {
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@ -343,35 +251,10 @@ func (this *Connection) notifyReadEvent() {
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}
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}
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func (this *Connection) MarkPeerClose() {
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this.Lock()
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defer this.Unlock()
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if this.state == ConnStateReadyToClose {
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this.state = ConnStateClosed
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go this.Terminate()
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return
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}
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if this.state == ConnStateActive {
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this.state = ConnStatePeerClosed
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}
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this.kcpAccess.Lock()
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this.kcp.ClearSendQueue()
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this.kcpAccess.Unlock()
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}
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func (this *Connection) kcpInput(data []byte) {
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cmd := Command(data[0])
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opt := Option(data[1])
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if cmd == CommandTerminate {
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go this.Terminate()
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return
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}
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if opt == OptionClose {
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go this.MarkPeerClose()
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}
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this.kcpAccess.Lock()
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this.kcp.current = this.Elapsed()
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this.kcp.Input(data[2:])
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this.kcp.Input(data)
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this.kcpAccess.Unlock()
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this.notifyReadEvent()
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@ -383,6 +266,7 @@ func (this *Connection) FetchInputFrom(conn net.Conn) {
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payload := alloc.NewBuffer()
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nBytes, err := conn.Read(payload.Value)
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if err != nil {
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payload.Release()
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return
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}
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payload.Slice(0, nBytes)
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@ -401,3 +285,12 @@ func (this *Connection) Reusable() bool {
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}
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func (this *Connection) SetReusable(b bool) {}
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func (this *Connection) Terminate() {
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if this == nil || this.writer == nil {
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return
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}
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log.Info("Terminating connection to ", this.RemoteAddr())
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this.writer.Close()
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}
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@ -18,7 +18,7 @@ func DialKCP(src v2net.Address, dest v2net.Destination) (internet.Connection, er
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}
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cpip := NewSimpleAuthenticator()
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session := NewConnection(rand.Uint32(), conn, conn.LocalAddr().(*net.UDPAddr), conn.RemoteAddr().(*net.UDPAddr), cpip)
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session := NewConnection(uint16(rand.Uint32()), conn, conn.LocalAddr().(*net.UDPAddr), conn.RemoteAddr().(*net.UDPAddr), cpip)
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session.FetchInputFrom(conn)
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return session, nil
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@ -6,9 +6,9 @@
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package kcp
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import (
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"encoding/binary"
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"github.com/v2ray/v2ray-core/common/alloc"
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v2io "github.com/v2ray/v2ray-core/common/io"
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"github.com/v2ray/v2ray-core/common/log"
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)
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const (
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@ -31,45 +31,6 @@ const (
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IKCP_PROBE_LIMIT = 120000 // up to 120 secs to probe window
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)
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// Output is a closure which captures conn and calls conn.Write
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type Output func(buf []byte)
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/* encode 8 bits unsigned int */
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func ikcp_encode8u(p []byte, c byte) []byte {
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p[0] = c
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return p[1:]
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}
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/* decode 8 bits unsigned int */
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func ikcp_decode8u(p []byte, c *byte) []byte {
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*c = p[0]
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return p[1:]
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}
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/* encode 16 bits unsigned int (lsb) */
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func ikcp_encode16u(p []byte, w uint16) []byte {
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binary.LittleEndian.PutUint16(p, w)
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return p[2:]
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}
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/* decode 16 bits unsigned int (lsb) */
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func ikcp_decode16u(p []byte, w *uint16) []byte {
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*w = binary.LittleEndian.Uint16(p)
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return p[2:]
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}
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/* encode 32 bits unsigned int (lsb) */
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func ikcp_encode32u(p []byte, l uint32) []byte {
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binary.LittleEndian.PutUint32(p, l)
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return p[4:]
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}
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/* decode 32 bits unsigned int (lsb) */
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func ikcp_decode32u(p []byte, l *uint32) []byte {
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*l = binary.LittleEndian.Uint32(p)
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return p[4:]
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}
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func _imin_(a, b uint32) uint32 {
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if a <= b {
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return a
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@ -90,49 +51,22 @@ func _itimediff(later, earlier uint32) int32 {
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return (int32)(later - earlier)
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}
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// Segment defines a KCP segment
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type Segment struct {
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conv uint32
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cmd uint32
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frg uint32
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wnd uint32
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ts uint32
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sn uint32
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una uint32
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resendts uint32
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fastack uint32
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xmit uint32
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data *alloc.Buffer
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}
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type State int
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// encode a segment into buffer
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func (seg *Segment) encode(ptr []byte) []byte {
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ptr = ikcp_encode32u(ptr, seg.conv)
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ptr = ikcp_encode8u(ptr, uint8(seg.cmd))
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ptr = ikcp_encode8u(ptr, uint8(seg.frg))
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ptr = ikcp_encode16u(ptr, uint16(seg.wnd))
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ptr = ikcp_encode32u(ptr, seg.ts)
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ptr = ikcp_encode32u(ptr, seg.sn)
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ptr = ikcp_encode32u(ptr, seg.una)
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ptr = ikcp_encode16u(ptr, uint16(seg.data.Len()))
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return ptr
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}
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func (this *Segment) Release() {
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this.data.Release()
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this.data = nil
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}
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// NewSegment creates a KCP segment
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func NewSegment() *Segment {
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return &Segment{
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data: alloc.NewSmallBuffer().Clear(),
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}
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}
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const (
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StateActive State = 0
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StateReadyToClose State = 1
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StatePeerClosed State = 2
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StateTerminating State = 3
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StateTerminated State = 4
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)
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// KCP defines a single KCP connection
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type KCP struct {
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conv, mtu, mss, state uint32
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conv uint16
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state State
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stateBeginTime uint32
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mtu, mss uint32
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snd_una, snd_nxt, rcv_nxt uint32
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ts_recent, ts_lastack, ssthresh uint32
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rx_rttvar, rx_srtt, rx_rto uint32
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@ -143,21 +77,21 @@ type KCP struct {
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dead_link, incr uint32
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snd_queue *SendingQueue
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rcv_queue []*Segment
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snd_buf []*Segment
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rcv_queue []*DataSegment
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snd_buf []*DataSegment
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rcv_buf *ReceivingWindow
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acklist []uint32
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acklist *ACKList
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buffer []byte
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fastresend int32
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congestionControl bool
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output Output
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output *SegmentWriter
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}
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// NewKCP create a new kcp control object, 'conv' must equal in two endpoint
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// from the same connection.
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func NewKCP(conv uint32, mtu uint32, sendingWindowSize uint32, receivingWindowSize uint32, sendingQueueSize uint32, output Output) *KCP {
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func NewKCP(conv uint16, mtu uint32, sendingWindowSize uint32, receivingWindowSize uint32, sendingQueueSize uint32, output v2io.Writer) *KCP {
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kcp := new(KCP)
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kcp.conv = conv
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kcp.snd_wnd = sendingWindowSize
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@ -165,18 +99,51 @@ func NewKCP(conv uint32, mtu uint32, sendingWindowSize uint32, receivingWindowSi
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kcp.rmt_wnd = IKCP_WND_RCV
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kcp.mtu = mtu
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kcp.mss = kcp.mtu - IKCP_OVERHEAD
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kcp.buffer = make([]byte, (kcp.mtu+IKCP_OVERHEAD)*3)
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kcp.rx_rto = IKCP_RTO_DEF
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kcp.interval = IKCP_INTERVAL
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kcp.ts_flush = IKCP_INTERVAL
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kcp.ssthresh = IKCP_THRESH_INIT
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kcp.dead_link = IKCP_DEADLINK
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kcp.output = output
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kcp.output = NewSegmentWriter(mtu, output)
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kcp.rcv_buf = NewReceivingWindow(receivingWindowSize)
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kcp.snd_queue = NewSendingQueue(sendingQueueSize)
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kcp.acklist = new(ACKList)
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return kcp
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}
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|
||||
func (kcp *KCP) HandleOption(opt SegmentOption) {
|
||||
if (opt & SegmentOptionClose) == SegmentOptionClose {
|
||||
kcp.OnPeerClosed()
|
||||
}
|
||||
}
|
||||
|
||||
func (kcp *KCP) OnPeerClosed() {
|
||||
if kcp.state == StateReadyToClose {
|
||||
kcp.state = StateTerminating
|
||||
kcp.stateBeginTime = kcp.current
|
||||
log.Info("KCP terminating at ", kcp.current)
|
||||
}
|
||||
if kcp.state == StateActive {
|
||||
kcp.ClearSendQueue()
|
||||
kcp.state = StatePeerClosed
|
||||
kcp.stateBeginTime = kcp.current
|
||||
log.Info("KCP peer close at ", kcp.current)
|
||||
}
|
||||
}
|
||||
|
||||
func (kcp *KCP) OnClose() {
|
||||
if kcp.state == StateActive {
|
||||
kcp.state = StateReadyToClose
|
||||
kcp.stateBeginTime = kcp.current
|
||||
log.Info("KCP ready close at ", kcp.current)
|
||||
}
|
||||
if kcp.state == StatePeerClosed {
|
||||
kcp.state = StateTerminating
|
||||
kcp.stateBeginTime = kcp.current
|
||||
log.Info("KCP terminating at ", kcp.current)
|
||||
}
|
||||
}
|
||||
|
||||
// Recv is user/upper level recv: returns size, returns below zero for EAGAIN
|
||||
func (kcp *KCP) Recv(buffer []byte) (n int) {
|
||||
if len(kcp.rcv_queue) == 0 {
|
||||
@ -186,11 +153,11 @@ func (kcp *KCP) Recv(buffer []byte) (n int) {
|
||||
// merge fragment
|
||||
count := 0
|
||||
for _, seg := range kcp.rcv_queue {
|
||||
dataLen := seg.data.Len()
|
||||
dataLen := seg.Data.Len()
|
||||
if dataLen > len(buffer) {
|
||||
break
|
||||
}
|
||||
copy(buffer, seg.data.Value)
|
||||
copy(buffer, seg.Data.Value)
|
||||
seg.Release()
|
||||
buffer = buffer[dataLen:]
|
||||
n += dataLen
|
||||
@ -226,8 +193,9 @@ func (kcp *KCP) Send(buffer []byte) int {
|
||||
} else {
|
||||
size = len(buffer)
|
||||
}
|
||||
seg := NewSegment()
|
||||
seg.data.Append(buffer[:size])
|
||||
seg := &DataSegment{
|
||||
Data: alloc.NewSmallBuffer().Clear().Append(buffer[:size]),
|
||||
}
|
||||
kcp.snd_queue.Push(seg)
|
||||
buffer = buffer[size:]
|
||||
nBytes += size
|
||||
@ -262,7 +230,7 @@ func (kcp *KCP) update_ack(rtt int32) {
|
||||
func (kcp *KCP) shrink_buf() {
|
||||
if len(kcp.snd_buf) > 0 {
|
||||
seg := kcp.snd_buf[0]
|
||||
kcp.snd_una = seg.sn
|
||||
kcp.snd_una = seg.Number
|
||||
} else {
|
||||
kcp.snd_una = kcp.snd_nxt
|
||||
}
|
||||
@ -274,12 +242,12 @@ func (kcp *KCP) parse_ack(sn uint32) {
|
||||
}
|
||||
|
||||
for k, seg := range kcp.snd_buf {
|
||||
if sn == seg.sn {
|
||||
if sn == seg.Number {
|
||||
kcp.snd_buf = append(kcp.snd_buf[:k], kcp.snd_buf[k+1:]...)
|
||||
seg.Release()
|
||||
break
|
||||
}
|
||||
if _itimediff(sn, seg.sn) < 0 {
|
||||
if _itimediff(sn, seg.Number) < 0 {
|
||||
break
|
||||
}
|
||||
}
|
||||
@ -291,18 +259,18 @@ func (kcp *KCP) parse_fastack(sn uint32) {
|
||||
}
|
||||
|
||||
for _, seg := range kcp.snd_buf {
|
||||
if _itimediff(sn, seg.sn) < 0 {
|
||||
if _itimediff(sn, seg.Number) < 0 {
|
||||
break
|
||||
} else if sn != seg.sn {
|
||||
seg.fastack++
|
||||
} else if sn != seg.Number {
|
||||
seg.ackSkipped++
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (kcp *KCP) parse_una(una uint32) {
|
||||
func (kcp *KCP) HandleReceivingNext(receivingNext uint32) {
|
||||
count := 0
|
||||
for _, seg := range kcp.snd_buf {
|
||||
if _itimediff(una, seg.sn) > 0 {
|
||||
if _itimediff(receivingNext, seg.Number) > 0 {
|
||||
seg.Release()
|
||||
count++
|
||||
} else {
|
||||
@ -312,17 +280,12 @@ func (kcp *KCP) parse_una(una uint32) {
|
||||
kcp.snd_buf = kcp.snd_buf[count:]
|
||||
}
|
||||
|
||||
// ack append
|
||||
func (kcp *KCP) ack_push(sn, ts uint32) {
|
||||
kcp.acklist = append(kcp.acklist, sn, ts)
|
||||
func (kcp *KCP) HandleSendingNext(sendingNext uint32) {
|
||||
kcp.acklist.Clear(sendingNext)
|
||||
}
|
||||
|
||||
func (kcp *KCP) ack_get(p int) (sn, ts uint32) {
|
||||
return kcp.acklist[p*2+0], kcp.acklist[p*2+1]
|
||||
}
|
||||
|
||||
func (kcp *KCP) parse_data(newseg *Segment) {
|
||||
sn := newseg.sn
|
||||
func (kcp *KCP) parse_data(newseg *DataSegment) {
|
||||
sn := newseg.Number
|
||||
if _itimediff(sn, kcp.rcv_nxt+kcp.rcv_wnd) >= 0 ||
|
||||
_itimediff(sn, kcp.rcv_nxt) < 0 {
|
||||
return
|
||||
@ -338,163 +301,132 @@ func (kcp *KCP) parse_data(newseg *Segment) {
|
||||
|
||||
// Input when you received a low level packet (eg. UDP packet), call it
|
||||
func (kcp *KCP) Input(data []byte) int {
|
||||
//una := kcp.snd_una
|
||||
if len(data) < IKCP_OVERHEAD {
|
||||
return -1
|
||||
}
|
||||
|
||||
log.Info("KCP input at ", kcp.current)
|
||||
var seg ISegment
|
||||
var maxack uint32
|
||||
var flag int
|
||||
for {
|
||||
var ts, sn, una, conv uint32
|
||||
var wnd, length uint16
|
||||
var cmd, frg uint8
|
||||
|
||||
if len(data) < int(IKCP_OVERHEAD) {
|
||||
seg, data = ReadSegment(data)
|
||||
if seg == nil {
|
||||
break
|
||||
}
|
||||
|
||||
data = ikcp_decode32u(data, &conv)
|
||||
if conv != kcp.conv {
|
||||
return -1
|
||||
}
|
||||
|
||||
data = ikcp_decode8u(data, &cmd)
|
||||
data = ikcp_decode8u(data, &frg)
|
||||
data = ikcp_decode16u(data, &wnd)
|
||||
data = ikcp_decode32u(data, &ts)
|
||||
data = ikcp_decode32u(data, &sn)
|
||||
data = ikcp_decode32u(data, &una)
|
||||
data = ikcp_decode16u(data, &length)
|
||||
if len(data) < int(length) {
|
||||
return -2
|
||||
}
|
||||
|
||||
if cmd != IKCP_CMD_PUSH && cmd != IKCP_CMD_ACK {
|
||||
return -3
|
||||
}
|
||||
|
||||
if kcp.rmt_wnd < uint32(wnd) {
|
||||
kcp.rmt_wnd = uint32(wnd)
|
||||
}
|
||||
|
||||
kcp.parse_una(una)
|
||||
kcp.shrink_buf()
|
||||
|
||||
if cmd == IKCP_CMD_ACK {
|
||||
if _itimediff(kcp.current, ts) >= 0 {
|
||||
kcp.update_ack(_itimediff(kcp.current, ts))
|
||||
}
|
||||
kcp.parse_ack(sn)
|
||||
switch seg := seg.(type) {
|
||||
case *DataSegment:
|
||||
kcp.HandleOption(seg.Opt)
|
||||
kcp.HandleSendingNext(seg.SendingNext)
|
||||
kcp.shrink_buf()
|
||||
if flag == 0 {
|
||||
flag = 1
|
||||
maxack = sn
|
||||
} else if _itimediff(sn, maxack) > 0 {
|
||||
maxack = sn
|
||||
kcp.acklist.Add(seg.Number, seg.Timestamp)
|
||||
kcp.parse_data(seg)
|
||||
case *ACKSegment:
|
||||
kcp.HandleOption(seg.Opt)
|
||||
if kcp.rmt_wnd < seg.ReceivingWindow {
|
||||
kcp.rmt_wnd = seg.ReceivingWindow
|
||||
}
|
||||
} else if cmd == IKCP_CMD_PUSH {
|
||||
if _itimediff(sn, kcp.rcv_nxt+kcp.rcv_wnd) < 0 {
|
||||
kcp.ack_push(sn, ts)
|
||||
if _itimediff(sn, kcp.rcv_nxt) >= 0 {
|
||||
seg := NewSegment()
|
||||
seg.conv = conv
|
||||
seg.cmd = uint32(cmd)
|
||||
seg.frg = uint32(frg)
|
||||
seg.wnd = uint32(wnd)
|
||||
seg.ts = ts
|
||||
seg.sn = sn
|
||||
seg.una = una
|
||||
seg.data.Append(data[:length])
|
||||
kcp.parse_data(seg)
|
||||
kcp.HandleReceivingNext(seg.ReceivingNext)
|
||||
for i := 0; i < int(seg.Count); i++ {
|
||||
ts := seg.TimestampList[i]
|
||||
sn := seg.NumberList[i]
|
||||
if _itimediff(kcp.current, ts) >= 0 {
|
||||
kcp.update_ack(_itimediff(kcp.current, ts))
|
||||
}
|
||||
kcp.parse_ack(sn)
|
||||
if flag == 0 {
|
||||
flag = 1
|
||||
maxack = sn
|
||||
} else if _itimediff(sn, maxack) > 0 {
|
||||
maxack = sn
|
||||
}
|
||||
}
|
||||
} else {
|
||||
return -3
|
||||
kcp.shrink_buf()
|
||||
case *CmdOnlySegment:
|
||||
kcp.HandleOption(seg.Opt)
|
||||
if seg.Cmd == SegmentCommandTerminated {
|
||||
if kcp.state == StateActive ||
|
||||
kcp.state == StateReadyToClose ||
|
||||
kcp.state == StatePeerClosed {
|
||||
kcp.state = StateTerminating
|
||||
kcp.stateBeginTime = kcp.current
|
||||
log.Info("KCP terminating at ", kcp.current)
|
||||
} else if kcp.state == StateTerminating {
|
||||
kcp.state = StateTerminated
|
||||
kcp.stateBeginTime = kcp.current
|
||||
log.Info("KCP terminated at ", kcp.current)
|
||||
}
|
||||
}
|
||||
kcp.HandleReceivingNext(seg.ReceivinNext)
|
||||
kcp.HandleSendingNext(seg.SendingNext)
|
||||
default:
|
||||
}
|
||||
|
||||
data = data[length:]
|
||||
}
|
||||
|
||||
if flag != 0 {
|
||||
kcp.parse_fastack(maxack)
|
||||
}
|
||||
|
||||
/*
|
||||
if _itimediff(kcp.snd_una, una) > 0 {
|
||||
if kcp.cwnd < kcp.rmt_wnd {
|
||||
mss := kcp.mss
|
||||
if kcp.cwnd < kcp.ssthresh {
|
||||
kcp.cwnd++
|
||||
kcp.incr += mss
|
||||
} else {
|
||||
if kcp.incr < mss {
|
||||
kcp.incr = mss
|
||||
}
|
||||
kcp.incr += (mss*mss)/kcp.incr + (mss / 16)
|
||||
if (kcp.cwnd+1)*mss <= kcp.incr {
|
||||
kcp.cwnd++
|
||||
}
|
||||
}
|
||||
if kcp.cwnd > kcp.rmt_wnd {
|
||||
kcp.cwnd = kcp.rmt_wnd
|
||||
kcp.incr = kcp.rmt_wnd * mss
|
||||
}
|
||||
}
|
||||
}*/
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
// flush pending data
|
||||
func (kcp *KCP) flush() {
|
||||
current := kcp.current
|
||||
buffer := kcp.buffer
|
||||
change := 0
|
||||
//lost := false
|
||||
|
||||
if !kcp.updated {
|
||||
if kcp.state == StateTerminated {
|
||||
return
|
||||
}
|
||||
var seg Segment
|
||||
seg.conv = kcp.conv
|
||||
seg.cmd = IKCP_CMD_ACK
|
||||
seg.wnd = uint32(kcp.rcv_nxt + kcp.rcv_wnd)
|
||||
seg.una = kcp.rcv_nxt
|
||||
if kcp.state == StateTerminating {
|
||||
kcp.output.Write(&CmdOnlySegment{
|
||||
Conv: kcp.conv,
|
||||
Cmd: SegmentCommandTerminated,
|
||||
})
|
||||
kcp.output.Flush()
|
||||
|
||||
if _itimediff(kcp.current, kcp.stateBeginTime) > 8000 {
|
||||
kcp.state = StateTerminated
|
||||
log.Info("KCP terminated at ", kcp.current)
|
||||
kcp.stateBeginTime = kcp.current
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
if kcp.state == StateReadyToClose && _itimediff(kcp.current, kcp.stateBeginTime) > 15000 {
|
||||
kcp.state = StateTerminating
|
||||
log.Info("KCP terminating at ", kcp.current)
|
||||
kcp.stateBeginTime = kcp.current
|
||||
}
|
||||
|
||||
current := kcp.current
|
||||
segSent := false
|
||||
//lost := false
|
||||
|
||||
//var seg Segment
|
||||
//seg.conv = kcp.conv
|
||||
//seg.cmd = IKCP_CMD_ACK
|
||||
//seg.wnd = uint32(kcp.rcv_nxt + kcp.rcv_wnd)
|
||||
//seg.una = kcp.rcv_nxt
|
||||
|
||||
// flush acknowledges
|
||||
count := len(kcp.acklist) / 2
|
||||
ptr := buffer
|
||||
for i := 0; i < count; i++ {
|
||||
size := len(buffer) - len(ptr)
|
||||
if size+IKCP_OVERHEAD > int(kcp.mtu) {
|
||||
kcp.output(buffer[:size])
|
||||
ptr = buffer
|
||||
}
|
||||
seg.sn, seg.ts = kcp.ack_get(i)
|
||||
ptr = seg.encode(ptr)
|
||||
ackSeg := kcp.acklist.AsSegment()
|
||||
if ackSeg != nil {
|
||||
ackSeg.Conv = kcp.conv
|
||||
ackSeg.ReceivingWindow = uint32(kcp.rcv_nxt + kcp.rcv_wnd)
|
||||
ackSeg.ReceivingNext = kcp.rcv_nxt
|
||||
kcp.output.Write(ackSeg)
|
||||
segSent = true
|
||||
}
|
||||
kcp.acklist = nil
|
||||
|
||||
// calculate window size
|
||||
|
||||
cwnd := _imin_(kcp.snd_una+kcp.snd_wnd, kcp.rmt_wnd)
|
||||
if kcp.congestionControl {
|
||||
cwnd = _imin_(kcp.cwnd, cwnd)
|
||||
}
|
||||
|
||||
for !kcp.snd_queue.IsEmpty() && _itimediff(kcp.snd_nxt, cwnd) < 0 {
|
||||
newseg := kcp.snd_queue.Pop()
|
||||
newseg.conv = kcp.conv
|
||||
newseg.cmd = IKCP_CMD_PUSH
|
||||
newseg.wnd = seg.wnd
|
||||
newseg.ts = current
|
||||
newseg.sn = kcp.snd_nxt
|
||||
newseg.una = kcp.rcv_nxt
|
||||
newseg.resendts = current
|
||||
newseg.fastack = 0
|
||||
newseg.xmit = 0
|
||||
kcp.snd_buf = append(kcp.snd_buf, newseg)
|
||||
seg := kcp.snd_queue.Pop()
|
||||
seg.Conv = kcp.conv
|
||||
seg.Number = kcp.snd_nxt
|
||||
seg.timeout = current
|
||||
seg.ackSkipped = 0
|
||||
seg.transmit = 0
|
||||
kcp.snd_buf = append(kcp.snd_buf, seg)
|
||||
kcp.snd_nxt++
|
||||
}
|
||||
|
||||
@ -507,51 +439,75 @@ func (kcp *KCP) flush() {
|
||||
// flush data segments
|
||||
for _, segment := range kcp.snd_buf {
|
||||
needsend := false
|
||||
if segment.xmit == 0 {
|
||||
if segment.transmit == 0 {
|
||||
needsend = true
|
||||
segment.xmit++
|
||||
segment.resendts = current + kcp.rx_rto
|
||||
} else if _itimediff(current, segment.resendts) >= 0 {
|
||||
segment.transmit++
|
||||
segment.timeout = current + kcp.rx_rto
|
||||
} else if _itimediff(current, segment.timeout) >= 0 {
|
||||
needsend = true
|
||||
segment.xmit++
|
||||
segment.transmit++
|
||||
kcp.xmit++
|
||||
segment.resendts = current + kcp.rx_rto
|
||||
segment.timeout = current + kcp.rx_rto
|
||||
//lost = true
|
||||
} else if segment.fastack >= resent {
|
||||
} else if segment.ackSkipped >= resent {
|
||||
needsend = true
|
||||
segment.xmit++
|
||||
segment.fastack = 0
|
||||
segment.resendts = current + kcp.rx_rto
|
||||
change++
|
||||
segment.transmit++
|
||||
segment.ackSkipped = 0
|
||||
segment.timeout = current + kcp.rx_rto
|
||||
}
|
||||
|
||||
if needsend {
|
||||
segment.ts = current
|
||||
segment.wnd = seg.wnd
|
||||
segment.una = kcp.rcv_nxt
|
||||
|
||||
size := len(buffer) - len(ptr)
|
||||
need := IKCP_OVERHEAD + segment.data.Len()
|
||||
|
||||
if size+need >= int(kcp.mtu) {
|
||||
kcp.output(buffer[:size])
|
||||
ptr = buffer
|
||||
segment.Timestamp = current
|
||||
segment.SendingNext = kcp.snd_una
|
||||
segment.Opt = 0
|
||||
if kcp.state == StateReadyToClose {
|
||||
segment.Opt = SegmentOptionClose
|
||||
}
|
||||
|
||||
ptr = segment.encode(ptr)
|
||||
copy(ptr, segment.data.Value)
|
||||
ptr = ptr[segment.data.Len():]
|
||||
kcp.output.Write(segment)
|
||||
segSent = true
|
||||
|
||||
if segment.xmit >= kcp.dead_link {
|
||||
if segment.transmit >= kcp.dead_link {
|
||||
kcp.state = 0xFFFFFFFF
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// flash remain segments
|
||||
size := len(buffer) - len(ptr)
|
||||
if size > 0 {
|
||||
kcp.output(buffer[:size])
|
||||
kcp.output.Flush()
|
||||
|
||||
if !segSent && kcp.state == StateReadyToClose {
|
||||
kcp.output.Write(&CmdOnlySegment{
|
||||
Conv: kcp.conv,
|
||||
Cmd: SegmentCommandPing,
|
||||
Opt: SegmentOptionClose,
|
||||
ReceivinNext: kcp.rcv_nxt,
|
||||
SendingNext: kcp.snd_nxt,
|
||||
})
|
||||
kcp.output.Flush()
|
||||
segSent = true
|
||||
}
|
||||
|
||||
if !segSent && kcp.state == StateTerminating {
|
||||
kcp.output.Write(&CmdOnlySegment{
|
||||
Conv: kcp.conv,
|
||||
Cmd: SegmentCommandTerminated,
|
||||
ReceivinNext: kcp.rcv_nxt,
|
||||
SendingNext: kcp.snd_una,
|
||||
})
|
||||
kcp.output.Flush()
|
||||
segSent = true
|
||||
}
|
||||
|
||||
if !segSent {
|
||||
kcp.output.Write(&CmdOnlySegment{
|
||||
Conv: kcp.conv,
|
||||
Cmd: SegmentCommandPing,
|
||||
ReceivinNext: kcp.rcv_nxt,
|
||||
SendingNext: kcp.snd_una,
|
||||
})
|
||||
kcp.output.Flush()
|
||||
segSent = true
|
||||
}
|
||||
|
||||
// update ssthresh
|
||||
@ -613,54 +569,6 @@ func (kcp *KCP) Update(current uint32) {
|
||||
}
|
||||
}
|
||||
|
||||
// Check determines 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)
|
||||
func (kcp *KCP) Check(current uint32) uint32 {
|
||||
ts_flush := kcp.ts_flush
|
||||
tm_flush := int32(0x7fffffff)
|
||||
tm_packet := int32(0x7fffffff)
|
||||
minimal := uint32(0)
|
||||
if !kcp.updated {
|
||||
return current
|
||||
}
|
||||
|
||||
if _itimediff(current, ts_flush) >= 10000 ||
|
||||
_itimediff(current, ts_flush) < -10000 {
|
||||
ts_flush = current
|
||||
}
|
||||
|
||||
if _itimediff(current, ts_flush) >= 0 {
|
||||
return current
|
||||
}
|
||||
|
||||
tm_flush = _itimediff(ts_flush, current)
|
||||
|
||||
for _, seg := range kcp.snd_buf {
|
||||
diff := _itimediff(seg.resendts, current)
|
||||
if diff <= 0 {
|
||||
return current
|
||||
}
|
||||
if diff < tm_packet {
|
||||
tm_packet = diff
|
||||
}
|
||||
}
|
||||
|
||||
minimal = uint32(tm_packet)
|
||||
if tm_packet >= tm_flush {
|
||||
minimal = uint32(tm_flush)
|
||||
}
|
||||
if minimal >= kcp.interval {
|
||||
minimal = kcp.interval
|
||||
}
|
||||
|
||||
return current + minimal
|
||||
}
|
||||
|
||||
// NoDelay options
|
||||
// fastest: ikcp_nodelay(kcp, 1, 20, 2, 1)
|
||||
// nodelay: 0:disable(default), 1:enable
|
||||
|
||||
@ -1,7 +1,6 @@
|
||||
package kcp
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"net"
|
||||
"sync"
|
||||
"time"
|
||||
@ -9,6 +8,7 @@ import (
|
||||
"github.com/v2ray/v2ray-core/common/alloc"
|
||||
"github.com/v2ray/v2ray-core/common/log"
|
||||
v2net "github.com/v2ray/v2ray-core/common/net"
|
||||
"github.com/v2ray/v2ray-core/common/serial"
|
||||
"github.com/v2ray/v2ray-core/transport/internet"
|
||||
"github.com/v2ray/v2ray-core/transport/internet/udp"
|
||||
)
|
||||
@ -62,7 +62,7 @@ func (this *Listener) OnReceive(payload *alloc.Buffer, src v2net.Destination) {
|
||||
srcAddrStr := src.NetAddr()
|
||||
conn, found := this.sessions[srcAddrStr]
|
||||
if !found {
|
||||
conv := binary.LittleEndian.Uint32(payload.Value[2:6])
|
||||
conv := serial.BytesToUint16(payload.Value)
|
||||
writer := &Writer{
|
||||
hub: this.hub,
|
||||
dest: src,
|
||||
|
||||
@ -1,6 +1,7 @@
|
||||
package kcp
|
||||
|
||||
import (
|
||||
"io"
|
||||
"sync"
|
||||
|
||||
"github.com/v2ray/v2ray-core/common/alloc"
|
||||
@ -34,7 +35,7 @@ func (this *SegmentWriter) Write(seg ISegment) {
|
||||
this.buffer = alloc.NewSmallBuffer().Clear()
|
||||
}
|
||||
|
||||
this.buffer.Value = seg.Bytes(this.buffer.Value)
|
||||
this.buffer.Append(seg.Bytes(nil))
|
||||
}
|
||||
|
||||
func (this *SegmentWriter) FlushWithoutLock() {
|
||||
@ -52,3 +53,18 @@ func (this *SegmentWriter) Flush() {
|
||||
|
||||
this.FlushWithoutLock()
|
||||
}
|
||||
|
||||
type AuthenticationWriter struct {
|
||||
Authenticator Authenticator
|
||||
Writer io.Writer
|
||||
}
|
||||
|
||||
func (this *AuthenticationWriter) Write(payload *alloc.Buffer) error {
|
||||
defer payload.Release()
|
||||
|
||||
this.Authenticator.Seal(payload)
|
||||
_, err := this.Writer.Write(payload.Value)
|
||||
return err
|
||||
}
|
||||
|
||||
func (this *AuthenticationWriter) Release() {}
|
||||
|
||||
@ -3,14 +3,14 @@ package kcp
|
||||
type ReceivingWindow struct {
|
||||
start uint32
|
||||
size uint32
|
||||
list []*Segment
|
||||
list []*DataSegment
|
||||
}
|
||||
|
||||
func NewReceivingWindow(size uint32) *ReceivingWindow {
|
||||
return &ReceivingWindow{
|
||||
start: 0,
|
||||
size: size,
|
||||
list: make([]*Segment, size),
|
||||
list: make([]*DataSegment, size),
|
||||
}
|
||||
}
|
||||
|
||||
@ -22,7 +22,7 @@ func (this *ReceivingWindow) Position(idx uint32) uint32 {
|
||||
return (idx + this.start) % this.size
|
||||
}
|
||||
|
||||
func (this *ReceivingWindow) Set(idx uint32, value *Segment) bool {
|
||||
func (this *ReceivingWindow) Set(idx uint32, value *DataSegment) bool {
|
||||
pos := this.Position(idx)
|
||||
if this.list[pos] != nil {
|
||||
return false
|
||||
@ -31,14 +31,14 @@ func (this *ReceivingWindow) Set(idx uint32, value *Segment) bool {
|
||||
return true
|
||||
}
|
||||
|
||||
func (this *ReceivingWindow) Remove(idx uint32) *Segment {
|
||||
func (this *ReceivingWindow) Remove(idx uint32) *DataSegment {
|
||||
pos := this.Position(idx)
|
||||
e := this.list[pos]
|
||||
this.list[pos] = nil
|
||||
return e
|
||||
}
|
||||
|
||||
func (this *ReceivingWindow) RemoveFirst() *Segment {
|
||||
func (this *ReceivingWindow) RemoveFirst() *DataSegment {
|
||||
return this.Remove(0)
|
||||
}
|
||||
|
||||
@ -76,12 +76,19 @@ func (this *ACKList) Clear(una uint32) {
|
||||
|
||||
func (this *ACKList) AsSegment() *ACKSegment {
|
||||
count := len(this.numbers)
|
||||
if count > 16 {
|
||||
count = 16
|
||||
if count == 0 {
|
||||
return nil
|
||||
}
|
||||
return &ACKSegment{
|
||||
|
||||
if count > 128 {
|
||||
count = 128
|
||||
}
|
||||
seg := &ACKSegment{
|
||||
Count: byte(count),
|
||||
NumberList: this.numbers[:count],
|
||||
TimestampList: this.timestamps[:count],
|
||||
}
|
||||
//this.numbers = nil
|
||||
//this.timestamps = nil
|
||||
return seg
|
||||
}
|
||||
|
||||
@ -12,10 +12,10 @@ func TestRecivingWindow(t *testing.T) {
|
||||
|
||||
window := NewReceivingWindow(3)
|
||||
|
||||
seg0 := &Segment{}
|
||||
seg1 := &Segment{}
|
||||
seg2 := &Segment{}
|
||||
seg3 := &Segment{}
|
||||
seg0 := &DataSegment{}
|
||||
seg1 := &DataSegment{}
|
||||
seg2 := &DataSegment{}
|
||||
seg3 := &DataSegment{}
|
||||
|
||||
assert.Bool(window.Set(0, seg0)).IsTrue()
|
||||
assert.Pointer(window.RemoveFirst()).Equals(seg0)
|
||||
|
||||
@ -3,6 +3,7 @@ package kcp
|
||||
import (
|
||||
"github.com/v2ray/v2ray-core/common"
|
||||
"github.com/v2ray/v2ray-core/common/alloc"
|
||||
_ "github.com/v2ray/v2ray-core/common/log"
|
||||
"github.com/v2ray/v2ray-core/common/serial"
|
||||
)
|
||||
|
||||
@ -12,6 +13,7 @@ const (
|
||||
SegmentCommandACK SegmentCommand = 0
|
||||
SegmentCommandData SegmentCommand = 1
|
||||
SegmentCommandTerminated SegmentCommand = 2
|
||||
SegmentCommandPing SegmentCommand = 3
|
||||
)
|
||||
|
||||
type SegmentOption byte
|
||||
@ -27,13 +29,12 @@ type ISegment interface {
|
||||
}
|
||||
|
||||
type DataSegment struct {
|
||||
Conv uint16
|
||||
Opt SegmentOption
|
||||
ReceivingWindow uint32
|
||||
Timestamp uint32
|
||||
Number uint32
|
||||
Unacknowledged uint32
|
||||
Data *alloc.Buffer
|
||||
Conv uint16
|
||||
Opt SegmentOption
|
||||
Timestamp uint32
|
||||
Number uint32
|
||||
SendingNext uint32
|
||||
Data *alloc.Buffer
|
||||
|
||||
timeout uint32
|
||||
ackSkipped uint32
|
||||
@ -43,17 +44,16 @@ type DataSegment struct {
|
||||
func (this *DataSegment) Bytes(b []byte) []byte {
|
||||
b = serial.Uint16ToBytes(this.Conv, b)
|
||||
b = append(b, byte(SegmentCommandData), byte(this.Opt))
|
||||
b = serial.Uint32ToBytes(this.ReceivingWindow, b)
|
||||
b = serial.Uint32ToBytes(this.Timestamp, b)
|
||||
b = serial.Uint32ToBytes(this.Number, b)
|
||||
b = serial.Uint32ToBytes(this.Unacknowledged, b)
|
||||
b = serial.Uint32ToBytes(this.SendingNext, b)
|
||||
b = serial.Uint16ToBytes(uint16(this.Data.Len()), b)
|
||||
b = append(b, this.Data.Value...)
|
||||
return b
|
||||
}
|
||||
|
||||
func (this *DataSegment) ByteSize() int {
|
||||
return 2 + 1 + 1 + 4 + 4 + 4 + 4 + 2 + this.Data.Len()
|
||||
return 2 + 1 + 1 + 4 + 4 + 4 + 2 + this.Data.Len()
|
||||
}
|
||||
|
||||
func (this *DataSegment) Release() {
|
||||
@ -64,21 +64,21 @@ type ACKSegment struct {
|
||||
Conv uint16
|
||||
Opt SegmentOption
|
||||
ReceivingWindow uint32
|
||||
Unacknowledged uint32
|
||||
ReceivingNext uint32
|
||||
Count byte
|
||||
NumberList []uint32
|
||||
TimestampList []uint32
|
||||
}
|
||||
|
||||
func (this *ACKSegment) ByteSize() int {
|
||||
return 2 + 1 + 1 + 4 + 4 + 1 + len(this.NumberList)*4 + len(this.TimestampList)*4
|
||||
return 2 + 1 + 1 + 4 + 4 + 1 + int(this.Count)*4 + int(this.Count)*4
|
||||
}
|
||||
|
||||
func (this *ACKSegment) Bytes(b []byte) []byte {
|
||||
b = serial.Uint16ToBytes(this.Conv, b)
|
||||
b = append(b, byte(SegmentCommandACK), byte(this.Opt))
|
||||
b = serial.Uint32ToBytes(this.ReceivingWindow, b)
|
||||
b = serial.Uint32ToBytes(this.Unacknowledged, b)
|
||||
b = serial.Uint32ToBytes(this.ReceivingNext, b)
|
||||
b = append(b, this.Count)
|
||||
for i := byte(0); i < this.Count; i++ {
|
||||
b = serial.Uint32ToBytes(this.NumberList[i], b)
|
||||
@ -89,25 +89,30 @@ func (this *ACKSegment) Bytes(b []byte) []byte {
|
||||
|
||||
func (this *ACKSegment) Release() {}
|
||||
|
||||
type TerminationSegment struct {
|
||||
Conv uint16
|
||||
Opt SegmentOption
|
||||
type CmdOnlySegment struct {
|
||||
Conv uint16
|
||||
Cmd SegmentCommand
|
||||
Opt SegmentOption
|
||||
SendingNext uint32
|
||||
ReceivinNext uint32
|
||||
}
|
||||
|
||||
func (this *TerminationSegment) ByteSize() int {
|
||||
return 2 + 1 + 1
|
||||
func (this *CmdOnlySegment) ByteSize() int {
|
||||
return 2 + 1 + 1 + 4 + 4
|
||||
}
|
||||
|
||||
func (this *TerminationSegment) Bytes(b []byte) []byte {
|
||||
func (this *CmdOnlySegment) Bytes(b []byte) []byte {
|
||||
b = serial.Uint16ToBytes(this.Conv, b)
|
||||
b = append(b, byte(SegmentCommandTerminated), byte(this.Opt))
|
||||
b = append(b, byte(this.Cmd), byte(this.Opt))
|
||||
b = serial.Uint32ToBytes(this.SendingNext, b)
|
||||
b = serial.Uint32ToBytes(this.ReceivinNext, b)
|
||||
return b
|
||||
}
|
||||
|
||||
func (this *TerminationSegment) Release() {}
|
||||
func (this *CmdOnlySegment) Release() {}
|
||||
|
||||
func ReadSegment(buf []byte) (ISegment, []byte) {
|
||||
if len(buf) <= 12 {
|
||||
if len(buf) <= 6 {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
@ -123,16 +128,13 @@ func ReadSegment(buf []byte) (ISegment, []byte) {
|
||||
Conv: conv,
|
||||
Opt: opt,
|
||||
}
|
||||
seg.ReceivingWindow = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
seg.Timestamp = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
seg.Number = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
seg.Unacknowledged = serial.BytesToUint32(buf)
|
||||
seg.SendingNext = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
len := serial.BytesToUint16(buf)
|
||||
@ -152,7 +154,7 @@ func ReadSegment(buf []byte) (ISegment, []byte) {
|
||||
seg.ReceivingWindow = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
seg.Unacknowledged = serial.BytesToUint32(buf)
|
||||
seg.ReceivingNext = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
seg.Count = buf[0]
|
||||
@ -170,12 +172,17 @@ func ReadSegment(buf []byte) (ISegment, []byte) {
|
||||
return seg, buf
|
||||
}
|
||||
|
||||
if cmd == SegmentCommandTerminated {
|
||||
return &TerminationSegment{
|
||||
Conv: conv,
|
||||
Opt: opt,
|
||||
}, buf
|
||||
seg := &CmdOnlySegment{
|
||||
Conv: conv,
|
||||
Cmd: cmd,
|
||||
Opt: opt,
|
||||
}
|
||||
|
||||
return nil, nil
|
||||
seg.SendingNext = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
seg.ReceivinNext = serial.BytesToUint32(buf)
|
||||
buf = buf[4:]
|
||||
|
||||
return seg, buf
|
||||
}
|
||||
|
||||
@ -20,12 +20,11 @@ func TestDataSegment(t *testing.T) {
|
||||
assert := assert.On(t)
|
||||
|
||||
seg := &DataSegment{
|
||||
Conv: 1,
|
||||
ReceivingWindow: 2,
|
||||
Timestamp: 3,
|
||||
Number: 4,
|
||||
Unacknowledged: 5,
|
||||
Data: alloc.NewSmallBuffer().Clear().Append([]byte{'a', 'b', 'c', 'd'}),
|
||||
Conv: 1,
|
||||
Timestamp: 3,
|
||||
Number: 4,
|
||||
SendingNext: 5,
|
||||
Data: alloc.NewSmallBuffer().Clear().Append([]byte{'a', 'b', 'c', 'd'}),
|
||||
}
|
||||
|
||||
nBytes := seg.ByteSize()
|
||||
@ -36,9 +35,8 @@ func TestDataSegment(t *testing.T) {
|
||||
iseg, _ := ReadSegment(bytes)
|
||||
seg2 := iseg.(*DataSegment)
|
||||
assert.Uint16(seg2.Conv).Equals(seg.Conv)
|
||||
assert.Uint32(seg2.ReceivingWindow).Equals(seg.ReceivingWindow)
|
||||
assert.Uint32(seg2.Timestamp).Equals(seg.Timestamp)
|
||||
assert.Uint32(seg2.Unacknowledged).Equals(seg.Unacknowledged)
|
||||
assert.Uint32(seg2.SendingNext).Equals(seg.SendingNext)
|
||||
assert.Uint32(seg2.Number).Equals(seg.Number)
|
||||
assert.Bytes(seg2.Data.Value).Equals(seg.Data.Value)
|
||||
}
|
||||
@ -49,7 +47,7 @@ func TestACKSegment(t *testing.T) {
|
||||
seg := &ACKSegment{
|
||||
Conv: 1,
|
||||
ReceivingWindow: 2,
|
||||
Unacknowledged: 3,
|
||||
ReceivingNext: 3,
|
||||
Count: 5,
|
||||
NumberList: []uint32{1, 3, 5, 7, 9},
|
||||
TimestampList: []uint32{2, 4, 6, 8, 10},
|
||||
@ -64,7 +62,7 @@ func TestACKSegment(t *testing.T) {
|
||||
seg2 := iseg.(*ACKSegment)
|
||||
assert.Uint16(seg2.Conv).Equals(seg.Conv)
|
||||
assert.Uint32(seg2.ReceivingWindow).Equals(seg.ReceivingWindow)
|
||||
assert.Uint32(seg2.Unacknowledged).Equals(seg.Unacknowledged)
|
||||
assert.Uint32(seg2.ReceivingNext).Equals(seg.ReceivingNext)
|
||||
assert.Byte(seg2.Count).Equals(seg.Count)
|
||||
for i := byte(0); i < seg2.Count; i++ {
|
||||
assert.Uint32(seg2.TimestampList[i]).Equals(seg.TimestampList[i])
|
||||
|
||||
@ -4,14 +4,14 @@ type SendingQueue struct {
|
||||
start uint32
|
||||
cap uint32
|
||||
len uint32
|
||||
list []*Segment
|
||||
list []*DataSegment
|
||||
}
|
||||
|
||||
func NewSendingQueue(size uint32) *SendingQueue {
|
||||
return &SendingQueue{
|
||||
start: 0,
|
||||
cap: size,
|
||||
list: make([]*Segment, size),
|
||||
list: make([]*DataSegment, size),
|
||||
len: 0,
|
||||
}
|
||||
}
|
||||
@ -24,7 +24,7 @@ func (this *SendingQueue) IsEmpty() bool {
|
||||
return this.len == 0
|
||||
}
|
||||
|
||||
func (this *SendingQueue) Pop() *Segment {
|
||||
func (this *SendingQueue) Pop() *DataSegment {
|
||||
if this.IsEmpty() {
|
||||
return nil
|
||||
}
|
||||
@ -38,7 +38,7 @@ func (this *SendingQueue) Pop() *Segment {
|
||||
return seg
|
||||
}
|
||||
|
||||
func (this *SendingQueue) Push(seg *Segment) {
|
||||
func (this *SendingQueue) Push(seg *DataSegment) {
|
||||
if this.IsFull() {
|
||||
return
|
||||
}
|
||||
|
||||
@ -12,10 +12,10 @@ func TestSendingQueue(t *testing.T) {
|
||||
|
||||
queue := NewSendingQueue(3)
|
||||
|
||||
seg0 := &Segment{}
|
||||
seg1 := &Segment{}
|
||||
seg2 := &Segment{}
|
||||
seg3 := &Segment{}
|
||||
seg0 := &DataSegment{}
|
||||
seg1 := &DataSegment{}
|
||||
seg2 := &DataSegment{}
|
||||
seg3 := &DataSegment{}
|
||||
|
||||
assert.Bool(queue.IsEmpty()).IsTrue()
|
||||
assert.Bool(queue.IsFull()).IsFalse()
|
||||
@ -44,10 +44,10 @@ func TestSendingQueueClear(t *testing.T) {
|
||||
|
||||
queue := NewSendingQueue(3)
|
||||
|
||||
seg0 := &Segment{}
|
||||
seg1 := &Segment{}
|
||||
seg2 := &Segment{}
|
||||
seg3 := &Segment{}
|
||||
seg0 := &DataSegment{}
|
||||
seg1 := &DataSegment{}
|
||||
seg2 := &DataSegment{}
|
||||
seg3 := &DataSegment{}
|
||||
|
||||
queue.Push(seg0)
|
||||
assert.Bool(queue.IsEmpty()).IsFalse()
|
||||
|
||||
Loading…
Reference in New Issue
Block a user