Add quic transporter

relay/client/dialer/quic/quic.go

@@ -0,0 +1,32 @@
+package quic
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+
+	"github.com/quic-go/quic-go"
+	log "github.com/sirupsen/logrus"
+)
+
+func Dial(address string) (net.Conn, error) {
+	tlsConf := &tls.Config{
+		InsecureSkipVerify: true,
+		NextProtos:         []string{"quic-echo-example"},
+	}
+	qConn, err := quic.DialAddr(context.Background(), address, tlsConf, &quic.Config{
+		EnableDatagrams: true,
+	})
+	if err != nil {
+		log.Errorf("dial quic address %s failed: %s", address, err)
+		return nil, err
+	}
+
+	stream, err := qConn.OpenStreamSync(context.Background())
+	if err != nil {
+		return nil, err
+	}
+
+	conn := NewConn(stream, qConn)
+	return conn, nil
+}