update

Hunter0x7c7

2022-08-11 b8230139fb40edea387617b6accd8371e37eda58

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package kcp 
 
import ( 
    "context" 
    "io" 
    "sync/atomic" 
 
    "github.com/v2fly/v2ray-core/v5/common" 
    "github.com/v2fly/v2ray-core/v5/common/buf" 
    "github.com/v2fly/v2ray-core/v5/common/dice" 
    "github.com/v2fly/v2ray-core/v5/common/net" 
    "github.com/v2fly/v2ray-core/v5/transport/internet" 
    "github.com/v2fly/v2ray-core/v5/transport/internet/tls" 
) 
 
var globalConv = uint32(dice.RollUint16()) 
 
func fetchInput(_ context.Context, input io.Reader, reader PacketReader, conn *Connection) { 
    cache := make(chan *buf.Buffer, 1024) 
    go func() { 
        for { 
            payload := buf.New() 
            if _, err := payload.ReadFrom(input); err != nil { 
                payload.Release() 
                close(cache) 
                return 
            } 
            select { 
            case cache <- payload: 
            default: 
                payload.Release() 
            } 
        } 
    }() 
 
    for payload := range cache { 
        segments := reader.Read(payload.Bytes()) 
        payload.Release() 
        if len(segments) > 0 { 
            conn.Input(segments) 
        } 
    } 
} 
 
// DialKCP dials a new KCP connections to the specific destination. 
func DialKCP(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) { 
    dest.Network = net.Network_UDP 
    newError("dialing mKCP to ", dest).WriteToLog() 
 
    rawConn, err := internet.DialSystem(ctx, dest, streamSettings.SocketSettings) 
    if err != nil { 
        return nil, newError("failed to dial to dest: ", err).AtWarning().Base(err) 
    } 
 
    kcpSettings := streamSettings.ProtocolSettings.(*Config) 
 
    header, err := kcpSettings.GetPackerHeader() 
    if err != nil { 
        return nil, newError("failed to create packet header").Base(err) 
    } 
    security, err := kcpSettings.GetSecurity() 
    if err != nil { 
        return nil, newError("failed to create security").Base(err) 
    } 
    reader := &KCPPacketReader{ 
        Header:   header, 
        Security: security, 
    } 
    writer := &KCPPacketWriter{ 
        Header:   header, 
        Security: security, 
        Writer:   rawConn, 
    } 
 
    conv := uint16(atomic.AddUint32(&globalConv, 1)) 
    session := NewConnection(ConnMetadata{ 
        LocalAddr:    rawConn.LocalAddr(), 
        RemoteAddr:   rawConn.RemoteAddr(), 
        Conversation: conv, 
    }, writer, rawConn, kcpSettings) 
 
    go fetchInput(ctx, rawConn, reader, session) 
 
    var iConn internet.Connection = session 
 
    if config := tls.ConfigFromStreamSettings(streamSettings); config != nil { 
        iConn = tls.Client(iConn, config.GetTLSConfig(tls.WithDestination(dest))) 
    } 
 
    return iConn, nil 
} 
 
func init() { 
    common.Must(internet.RegisterTransportDialer(protocolName, DialKCP)) 
}