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Commit 79e282d6 authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
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Merge "CEC : Add additional validator for message record status" am: 8f150a68 

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1413608

Change-Id: Ie974eb20b33ffcd44c135e86c95de6b5616ac85f
parents 39ce253f 8f150a68

services/core/java/com/android/server/hdmi/HdmiCecMessageValidator.java

+22 −2
Original line number Diff line number Diff line
@@ -117,14 +117,15 @@ public class HdmiCecMessageValidator { 
        // TODO: Validate more than length for the following messages.



        // Messages for the One Touch Record.

        FixedLengthValidator oneByteValidator = new FixedLengthValidator(1);

        addValidationInfo(Constants.MESSAGE_RECORD_ON,

                new VariableLengthValidator(1, 8), DEST_DIRECT);

        addValidationInfo(Constants.MESSAGE_RECORD_STATUS, oneByteValidator, DEST_DIRECT);

        addValidationInfo(Constants.MESSAGE_RECORD_STATUS,

                new RecordStatusInfoValidator(), DEST_DIRECT);



        // TODO: Handle messages for the Timer Programming.



        // Messages for the System Information.

        FixedLengthValidator oneByteValidator = new FixedLengthValidator(1);

        addValidationInfo(Constants.MESSAGE_CEC_VERSION, oneByteValidator, DEST_DIRECT);

        addValidationInfo(Constants.MESSAGE_SET_MENU_LANGUAGE,

                new FixedLengthValidator(3), DEST_BROADCAST);
@@ -339,4 +340,23 @@ public class HdmiCecMessageValidator { 
                    isValidPhysicalAddress(params, 0) && isValidPhysicalAddress(params, 2));

        }

    }



    /**

     * Check if the given record status message parameter is valid.

     * A valid parameter should lie within the range description of Record Status Info defined in

     * CEC 1.4 Specification : Operand Descriptions (Section 17)

     */

    private class RecordStatusInfoValidator implements ParameterValidator {

        @Override

        public int isValid(byte[] params) {

            if (params.length < 1) {

                return ERROR_PARAMETER_SHORT;

            }

            return toErrorCode(isWithinRange(params[0], 0x01, 0x07)

                            || isWithinRange(params[0], 0x09, 0x0E)

                            || isWithinRange(params[0], 0x10, 0x17)

                            || isWithinRange(params[0], 0x1A, 0x1B)

                            || params[0] == 0x1F);

        }

    }

}