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91 lines
2.1 KiB
91 lines
2.1 KiB
package kcp
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import (
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"context"
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"crypto/tls"
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"io"
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"sync/atomic"
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"v2ray.com/core/app/log"
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"v2ray.com/core/common"
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"v2ray.com/core/common/buf"
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"v2ray.com/core/common/dice"
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"v2ray.com/core/common/net"
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"v2ray.com/core/transport/internet"
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v2tls "v2ray.com/core/transport/internet/tls"
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)
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var (
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globalConv = uint32(dice.RollUint16())
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)
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func fetchInput(ctx context.Context, input io.Reader, reader PacketReader, conn *Connection) {
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payload := buf.New()
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defer payload.Release()
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for {
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err := payload.Reset(buf.ReadFrom(input))
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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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segments := reader.Read(payload.Bytes())
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if len(segments) > 0 {
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conn.Input(segments)
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}
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}
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}
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func DialKCP(ctx context.Context, dest net.Destination) (internet.Connection, error) {
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dest.Network = net.Network_UDP
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log.Trace(newError("dialing mKCP to ", dest))
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src := internet.DialerSourceFromContext(ctx)
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rawConn, err := internet.DialSystem(ctx, src, dest)
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if err != nil {
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return nil, newError("failed to dial to dest: ", err).AtWarning().Base(err)
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}
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kcpSettings := internet.TransportSettingsFromContext(ctx).(*Config)
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header, err := kcpSettings.GetPackerHeader()
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if err != nil {
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return nil, newError("failed to create packet header").Base(err)
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}
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security, err := kcpSettings.GetSecurity()
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if err != nil {
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return nil, newError("failed to create security").Base(err)
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}
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reader := &KCPPacketReader{
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Header: header,
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Security: security,
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}
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writer := &KCPPacketWriter{
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Header: header,
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Security: security,
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Writer: rawConn,
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}
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conv := uint16(atomic.AddUint32(&globalConv, 1))
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session := NewConnection(ConnMetadata{
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LocalAddr: rawConn.LocalAddr(),
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RemoteAddr: rawConn.RemoteAddr(),
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Conversation: conv,
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}, writer, rawConn, kcpSettings)
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go fetchInput(ctx, rawConn, reader, session)
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var iConn internet.Connection = session
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if config := v2tls.ConfigFromContext(ctx, v2tls.WithDestination(dest)); config != nil {
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tlsConn := tls.Client(iConn, config.GetTLSConfig())
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iConn = tlsConn
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}
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return iConn, nil
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}
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func init() {
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common.Must(internet.RegisterTransportDialer(internet.TransportProtocol_MKCP, DialKCP))
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}
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