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Commit 0862fabd authored by Mark Tabry's avatar Mark Tabry
Browse files

Adds VMS START_SESSION message type and message definition. 

Bug: 130313799
Test: No tests affected. VmsUtils support will be added in a separate CL.
Change-Id: I1c7b713b85f191b057051737ca6bbdd0ae9bc170
parent e84f442c

automotive/vehicle/2.0/types.hal

+35 −1
Original line number Diff line number Diff line
@@ -3248,6 +3248,16 @@ enum DiagnosticFloatSensorIndex : int32_t { 
 * the message is decoded.

 */

enum VmsMessageType : int32_t {

    /**

     * A notification indicating that the sender has been reset.

     *

     * The receiving party must reset its internal state and respond to the

     * sender with a START_SESSION message as acknowledgement.

     *

     * This message type uses enum VmsStartSessionMessageIntegerValuesIndex.

     */

    START_SESSION = 17,



    /**

     * A request from the subscribers to the VMS service to subscribe to a layer.

     *
@@ -3364,7 +3374,7 @@ enum VmsMessageType : int32_t { 
     */

    PUBLISHER_INFORMATION_RESPONSE = 16,



    LAST_VMS_MESSAGE_TYPE = PUBLISHER_INFORMATION_RESPONSE,

    LAST_VMS_MESSAGE_TYPE = START_SESSION,

};



/**
@@ -3377,6 +3387,30 @@ enum VmsBaseMessageIntegerValuesIndex : int32_t { 
    MESSAGE_TYPE = 0,

};



/*

 * Handshake data sent as part of a VmsMessageType.START_SESSION message.

 *

 * A new session is initiated by sending a START_SESSION message with the

 * sender's identifier populated and the receiver's identifier set to -1.

 *

 * Identifier values are independently generated, but must be non-negative, and

 * increase monotonically between reboots.

 *

 * Upon receiving a START_SESSION with a mis-matching identifier, the receiver

 * must clear any cached VMS offering or subscription state and acknowledge the

 * new session by responding with a START_SESSION message that populates both

 * identifier fields.

 *

 * Any VMS messages received between initiation and completion of the handshake

 * must be discarded.

 */

enum VmsStartSessionMessageIntegerValuesIndex : VmsBaseMessageIntegerValuesIndex {

    /* Identifier field for the Android system service. */

    SERVICE_ID = 1,

    /* Identifier field for the HAL client process. */

    CLIENT_ID = 2,

};



/*

 * A VMS message with a layer is sent as part of a VmsMessageType.SUBSCRIBE or

 * VmsMessageType.UNSUBSCRIBE messages.