add http2 transport

pkg/dialer/http2/metadata.go

@@ -0,0 +1,37 @@
+package http2
+
+import (
+	"crypto/tls"
+	"net"
+
+	tls_util "github.com/go-gost/gost/pkg/common/util/tls"
+	md "github.com/go-gost/gost/pkg/metadata"
+)
+
+type metadata struct {
+	tlsConfig *tls.Config
+}
+
+func (d *http2Dialer) parseMetadata(md md.Metadata) (err error) {
+	const (
+		certFile   = "certFile"
+		keyFile    = "keyFile"
+		caFile     = "caFile"
+		secure     = "secure"
+		serverName = "serverName"
+	)
+
+	sn, _, _ := net.SplitHostPort(md.GetString(serverName))
+	if sn == "" {
+		sn = "localhost"
+	}
+	d.md.tlsConfig, err = tls_util.LoadClientConfig(
+		md.GetString(certFile),
+		md.GetString(keyFile),
+		md.GetString(caFile),
+		md.GetBool(secure),
+		sn,
+	)
+
+	return
+}