fix application bug

vendor/github.com/lucas-clemente/quic-go/internal/handshake/unsafe.go

@@ -0,0 +1,38 @@
+package handshake
+
+// This package uses unsafe to convert between:
+// * qtls.ConnectionState and tls.ConnectionState
+// * qtls.ClientSessionState and tls.ClientSessionState
+// We check in init() that this conversion actually is safe.
+
+import (
+	"crypto/tls"
+	"reflect"
+
+	"github.com/marten-seemann/qtls"
+)
+
+func init() {
+	if !structsEqual(&tls.ConnectionState{}, &qtls.ConnectionState{}) {
+		panic("qtls.ConnectionState not compatible with tls.ConnectionState")
+	}
+	if !structsEqual(&tls.ClientSessionState{}, &qtls.ClientSessionState{}) {
+		panic("qtls.ClientSessionState not compatible with tls.ClientSessionState")
+	}
+}
+
+func structsEqual(a, b interface{}) bool {
+	sa := reflect.ValueOf(a).Elem()
+	sb := reflect.ValueOf(b).Elem()
+	if sa.NumField() != sb.NumField() {
+		return false
+	}
+	for i := 0; i < sa.NumField(); i++ {
+		fa := sa.Type().Field(i)
+		fb := sb.Type().Field(i)
+		if !reflect.DeepEqual(fa.Index, fb.Index) || fa.Name != fb.Name || fa.Anonymous != fb.Anonymous || fa.Offset != fb.Offset || !reflect.DeepEqual(fa.Type, fb.Type) {
+			return false
+		}
+	}
+	return true
+}