limit HTTPRouteHTTPSListenerDetectMisdirectedRequests to h2 only (#4665) (#4667)

* limit HTTPRouteHTTPSListenerDetectMisdirectedRequests to h2 only



* fix lint



---------

Signed-off-by: zirain <zirain2009@gmail.com>

Author: zirain

conformance/tests/httproute-https-listener-detect-misdirected-requests.go

@@ -23,6 +23,7 @@ import (
 
 	"sigs.k8s.io/gateway-api/conformance/utils/http"
 	"sigs.k8s.io/gateway-api/conformance/utils/kubernetes"
+	"sigs.k8s.io/gateway-api/conformance/utils/roundtripper"
 	"sigs.k8s.io/gateway-api/conformance/utils/suite"
 	"sigs.k8s.io/gateway-api/conformance/utils/tls"
 	"sigs.k8s.io/gateway-api/pkg/features"
@@ -92,7 +93,11 @@ var HTTPRouteHTTPSListenerDetectMisdirectedRequests = suite.ConformanceTest{
 
 		for i, tc := range cases {
 			expected := http.ExpectedResponse{
-				Request:   http.Request{Host: tc.host, Path: "/detect-misdirected-requests"},
+				Request: http.Request{
+					Host:     tc.host,
+					Path:     "/detect-misdirected-requests",
+					Protocol: roundtripper.H2Protocol,
+				},
 				Response:  http.Response{StatusCodes: []int{tc.statusCode}},
 				Backend:   tc.backend,
 				Namespace: "gateway-conformance-infra",

conformance/utils/roundtripper/roundtripper.go

@@ -41,6 +41,7 @@ import (
 const (
 	H2CPriorKnowledgeProtocol = "H2C_PRIOR_KNOWLEDGE"
 	HTTPSProtocol             = "HTTPS"
+	H2Protocol                = "H2"
 )
 
 // RoundTripper is an interface used to make requests within conformance tests.
@@ -151,6 +152,18 @@ func (d *DefaultRoundTripper) httpTransport(request Request) (http.RoundTripper,
 	return transport, nil
 }
 
+func (d *DefaultRoundTripper) h2Transport(request Request) (http.RoundTripper, error) {
+	transport := &http2.Transport{}
+
+	tlsConfig, err := createTLSClientConfig(request)
+	if err != nil {
+		return nil, err
+	}
+	transport.TLSClientConfig = tlsConfig
+
+	return transport, nil
+}
+
 func (d *DefaultRoundTripper) h2cPriorKnowledgeTransport(request Request) (http.RoundTripper, error) {
 	if request.ServerName != "" && len(request.ServerCertificate) > 0 {
 		return nil, errors.New("request has configured trusted CA certificates but h2 prior knowledge is not encrypted")
@@ -178,6 +191,8 @@ func (d *DefaultRoundTripper) CaptureRoundTrip(request Request) (*CapturedReques
 	switch request.Protocol {
 	case H2CPriorKnowledgeProtocol:
 		transport, err = d.h2cPriorKnowledgeTransport(request)
+	case H2Protocol:
+		transport, err = d.h2Transport(request)
 	default:
 		transport, err = d.httpTransport(request)
 	}