feat(protocol): negotiate display and native input

tools/go-conformance/main.go

@@ -125,10 +125,12 @@ func evaluate(kind, input string) string {
 		}
 		return "valid"
 	case "tunnel":
-		if (parts["offered"] == "1" || parts["offered"] == "0" || parts["offered"] == "-1") && parts["feature"] == "control.v1" {
+		feature := parts["feature"]
+		registered := feature == "control.v1" || feature == "display.request.v1" || feature == "input.absolute.v1" || feature == "input.scroll.v1"
+		if (parts["offered"] == "1" || parts["offered"] == "0" || parts["offered"] == "-1") && registered {
 			return "valid"
 		}
-		if parts["feature"] != "control.v1" {
+		if !registered {
 			return "invalid:unsupported_feature"
 		}
 		return "invalid:unsupported_version"
@@ -226,6 +228,19 @@ func classifyGatewayInput(encoded string) string {
 				}
 			}
 		}
+	case 6:
+		if len(body) != 8 {
+			return "invalid:length"
+		}
+		x, y := uint16(body[0])<<8|uint16(body[1]), uint16(body[2])<<8|uint16(body[3])
+		width, height := uint16(body[4])<<8|uint16(body[5]), uint16(body[6])<<8|uint16(body[7])
+		if width == 0 || height == 0 || x >= width || y >= height {
+			return "invalid:field"
+		}
+	case 7:
+		if len(body) != 4 {
+			return "invalid:length"
+		}
 	default:
 		return "invalid:kind"
 	}