init

go-gost/x/handler/relay/entrypoint.go

@@ -0,0 +1,120 @@
+package relay
+
+import (
+	"context"
+	"net"
+	"time"
+
+	"github.com/go-gost/core/handler"
+	"github.com/go-gost/core/listener"
+	md "github.com/go-gost/core/metadata"
+	"github.com/go-gost/relay"
+	admission "github.com/go-gost/x/admission/wrapper"
+	xnet "github.com/go-gost/x/internal/net"
+	"github.com/go-gost/x/internal/net/proxyproto"
+	"github.com/go-gost/x/internal/util/mux"
+	metrics "github.com/go-gost/x/metrics/wrapper"
+)
+
+type tcpListener struct {
+	ln      net.Listener
+	options listener.Options
+}
+
+func newTCPListener(ln net.Listener, opts ...listener.Option) listener.Listener {
+	options := listener.Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+	return &tcpListener{
+		ln:      ln,
+		options: options,
+	}
+}
+
+func (l *tcpListener) Init(md md.Metadata) (err error) {
+	// l.logger.Debugf("pp: %d", l.options.ProxyProtocol)
+	ln := l.ln
+	ln = proxyproto.WrapListener(l.options.ProxyProtocol, ln, 10*time.Second)
+	ln = metrics.WrapListener(l.options.Service, ln)
+	ln = admission.WrapListener(l.options.Admission, ln)
+	l.ln = ln
+
+	return
+}
+
+func (l *tcpListener) Accept() (conn net.Conn, err error) {
+	return l.ln.Accept()
+}
+
+func (l *tcpListener) Addr() net.Addr {
+	return l.ln.Addr()
+}
+
+func (l *tcpListener) Close() error {
+	return l.ln.Close()
+}
+
+type tcpHandler struct {
+	session *mux.Session
+	options handler.Options
+}
+
+func newTCPHandler(session *mux.Session, opts ...handler.Option) handler.Handler {
+	options := handler.Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return &tcpHandler{
+		session: session,
+		options: options,
+	}
+}
+
+func (h *tcpHandler) Init(md md.Metadata) (err error) {
+	return
+}
+
+func (h *tcpHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
+	defer conn.Close()
+
+	start := time.Now()
+	log := h.options.Logger.WithFields(map[string]any{
+		"remote": conn.RemoteAddr().String(),
+		"local":  conn.LocalAddr().String(),
+	})
+
+	log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
+	defer func() {
+		log.WithFields(map[string]any{
+			"duration": time.Since(start),
+		}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
+	}()
+
+	cc, err := h.session.GetConn()
+	if err != nil {
+		log.Error(err)
+		return err
+	}
+	defer cc.Close()
+
+	af := &relay.AddrFeature{}
+	af.ParseFrom(conn.RemoteAddr().String())
+	resp := relay.Response{
+		Version:  relay.Version1,
+		Status:   relay.StatusOK,
+		Features: []relay.Feature{af},
+	}
+	if _, err := resp.WriteTo(cc); err != nil {
+		log.Error(err)
+		return err
+	}
+
+	t := time.Now()
+	log.Debugf("%s <-> %s", conn.RemoteAddr(), cc.RemoteAddr())
+	xnet.Transport(conn, cc)
+	log.WithFields(map[string]any{"duration": time.Since(t)}).
+		Debugf("%s >-< %s", conn.RemoteAddr(), cc.RemoteAddr())
+	return nil
+}