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ota.c
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ota.c
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/*
* AWS IoT Over-the-air Update v3.1.0
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* @file ota.c
* @brief Implementation of the AWS IoT Over-The-Air Updates Client Library.
*/
/* Standard library includes. */
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <assert.h>
/* OTA agent includes. */
#include "ota.h"
/* OTA_DO_NOT_USE_CUSTOM_CONFIG allows building the OTA library
* without a custom config. If a custom config is provided, the
* OTA_DO_NOT_USE_CUSTOM_CONFIG macro should not be defined. */
#ifndef OTA_DO_NOT_USE_CUSTOM_CONFIG
#include "ota_config.h"
#endif
/* Include config defaults header to get default values of configs not defined
* in ota_config.h file. */
#include "ota_config_defaults.h"
/* OTA Base64 includes */
#include "ota_base64_private.h"
/* OTA pal includes. */
#include "ota_platform_interface.h"
/* Internal header file for shared OTA definitions. */
#include "ota_private.h"
/* OTA interface includes. */
#include "ota_interface_private.h"
/* OTA OS interface. */
#include "ota_os_interface.h"
/* Core JSON include */
#include "core_json.h"
/* Include firmware version struct definition. */
#include "ota_appversion32.h"
/**
* @brief Offset helper.
*/
#define U16_OFFSET( type, member ) ( ( uint16_t ) offsetof( type, member ) )
/**
* @brief OTA event handler definition.
*/
typedef OtaErr_t ( * OtaEventHandler_t )( const OtaEventData_t * pEventMsg );
/**
* @ingroup ota_datatypes_structs
* @brief OTA Agent state table entry.
* */
typedef struct OtaStateTableEntry
{
OtaState_t currentState; /**< Current state of the agent. */
OtaEvent_t eventId; /**< Event corresponding to the action. */
OtaEventHandler_t handler; /**< Handler to invoke the next action. */
OtaState_t nextState; /**< New state to be triggered*/
} OtaStateTableEntry_t;
/**
* @brief OTA control interface.
*/
static OtaControlInterface_t otaControlInterface;
/**
* @brief OTA data interface.
*/
static OtaDataInterface_t otaDataInterface;
/* OTA agent private function prototypes. */
/**
* @brief Ingest a data block.
*
* A block of file data was received by the application via some configured communication protocol.
* If it looks like it is in range, write it to persistent storage. If it's the last block we're
* expecting, close the file and perform the final signature check on it. If the close and signature
* check are OK, let the caller know so it can be used by the system. Firmware updates generally
* reboot the system and perform a self test phase. If the close or signature check fails, abort
* the file transfer and return the result and any available details to the caller.
*
* @param[in] pFileContext Information of file to be streamed.
* @param[in] pRawMsg Raw job document.
* @param[in] messageSize Length of document.
* @param[in] pCloseResult Result of closing file in PAL.
* @return IngestResult_t IngestResultAccepted_Continue if successful, other error for failure.
*/
static IngestResult_t ingestDataBlock( OtaFileContext_t * pFileContext,
const uint8_t * pRawMsg,
uint32_t messageSize,
OtaPalStatus_t * pCloseResult );
/**
* @brief Validate the incoming data block and store it in the file context.
*
* @param[in] pFileContext Information of file to be streamed.
* @param[in] uBlockIndex Incoming block index.
* @param[in] uBlockSize Incoming block size.
* @param[out] pCloseResult Result of closing file in PAL.
* @param[in] pPayload Data from the block.
* @return IngestResult_t IngestResultAccepted_Continue if successful, other error for failure.
*/
static IngestResult_t processDataBlock( OtaFileContext_t * pFileContext,
uint32_t uBlockIndex,
uint32_t uBlockSize,
OtaPalStatus_t * pCloseResult,
uint8_t * pPayload );
/**
* @brief Free the resources allocated for data ingestion and close the file handle.
*
* @param[in] pFileContext Information of file to be streamed.
* @param[out] pCloseResult Result of closing file in PAL.
* @return IngestResult_t IngestResultAccepted_Continue if successful, other error for failure.
*/
static IngestResult_t ingestDataBlockCleanup( OtaFileContext_t * pFileContext,
OtaPalStatus_t * pCloseResult );
/**
* @brief Get the File Context From Job Document.
*
* We received an OTA update job message from the job service so process
* the message and update the file context.
*
* @param[in] pRawMsg Raw job document.
* @param[in] messageLength length of document.
* @return OtaFileContext_t* Information of file to be streamed.
*/
static OtaFileContext_t * getFileContextFromJob( const char * pRawMsg,
uint32_t messageLength );
/**
* @brief Validate JSON document and the DocModel.
*
* @param[in] pJson JSON job document.
* @param[in] messageLength Length of the job document.
* @return DocParseErr_t DocParseErrNone if successful, JSON document parser errors.
*/
static DocParseErr_t validateJSON( const char * pJson,
uint32_t messageLength );
/**
* @brief Store the parameter from the json to the offset specified by the document model.
*
* @param[in] docParam Structure to store the details of keys and where to store them.
* @param[in] pContextBase Start of file context.
* @param[in] pValueInJson Pointer to the value of the key in JSON buffer.
* @param[in] valueLength Length of the value.
* @return DocParseErr_t DocParseErrNone if successful, JSON document parser errors.
*/
static DocParseErr_t extractParameter( JsonDocParam_t docParam,
void * pContextBase,
const char * pValueInJson,
size_t valueLength );
/**
* @brief Extract the desired fields from the JSON document based on the specified document model.
*
* @param[in] pJson JSON job document.
* @param[in] messageLength Length of the job document.
* @param[in] pDocModel Details of expected parameters in the job doc.
* @return DocParseErr_t DocParseErr_t DocParseErrNone if successful, JSON document parser errors.
*/
static DocParseErr_t parseJSONbyModel( const char * pJson,
uint32_t messageLength,
JsonDocModel_t * pDocModel );
/**
* @brief Decode the base64 encoded file signature key from the job document and store it in file context.
*
* @param[in] pValueInJson Pointer to the value of the key in JSON buffer.
* @param[in] valueLength Length of the value.
* @param[out] pParamAdd Pointer to the location where the value is stored.
* @return DocParseErr_t DocParseErrNone if successful, JSON document parser errors.
*/
static DocParseErr_t decodeAndStoreKey( const char * pValueInJson,
size_t valueLength,
void * pParamAdd );
/**
* @brief Extract the value from json and store it into the allocated memory.
*
* @param[in] pKey Name of the Key to extract.
* @param[in] pValueInJson Pointer to the value of the key in JSON buffer.
* @param[in] valueLength Length of the value.
* @param[out] pParamAdd Pointer to the location where the value is stored.
* @param[in] pParamSizeAdd Size required to store the param.
* @return DocParseErr_t DocParseErrNone if successful, JSON document parser errors.
*/
static DocParseErr_t extractAndStoreArray( const char * pKey,
const char * pValueInJson,
size_t valueLength,
void * pParamAdd,
uint32_t * pParamSizeAdd );
/**
* @brief Check if all the required parameters for job document are extracted from the JSON.
*
* @param[in] pModelParam Structure to store the details of keys and where to store them.
* @param[in] pDocModel Details of expected parameters in the job doc.
* @return DocParseErr_t DocParseErrNone if successful, JSON document parser errors.
*/
static DocParseErr_t verifyRequiredParamsExtracted( const JsonDocParam_t * pModelParam,
const JsonDocModel_t * pDocModel );
/**
* @brief Validate the version of the update received.
*
* @param[in] pFileContext Information of file to be streamed.
* @return OtaErr_t OtaErrNone if successful, other error codes if failure.
*/
static OtaErr_t validateUpdateVersion( const OtaFileContext_t * pFileContext );
/**
* @brief Check if the JSON can be parsed through the app callback if initial parsing fails.
*
* @param[in] pJson JSON job document.
* @param[in] messageLength Length of the job document.
* @return OtaJobParseErr_t OtaJobParseErrNone if successful, other error codes if failure.
*/
static OtaJobParseErr_t handleCustomJob( const char * pJson,
uint32_t messageLength );
/**
* @brief Check if the incoming job document is not conflicting with current job status.
*
* @param[in] pFileContext Information of file to be streamed.
* @param[out] pFinalFile File that stores all extracted params.
* @param[out] pUpdateJob Represents if the job is accepted.
* @return OtaJobParseErr_t OtaErrNone if successful, other error codes if failure.
*/
static OtaJobParseErr_t verifyActiveJobStatus( OtaFileContext_t * pFileContext,
OtaFileContext_t ** pFinalFile,
bool * pUpdateJob );
/**
* @brief Check if all the file context params are valid and initialize resources for the job transfer.
*
* @param[in] pFileContext Information of file to be streamed.
* @param[out] pFinalFile File that stores all extracted params.
* @param[out] pUpdateJob Represents if the job is accepted.
* @return OtaJobParseErr_t OtaJobParseErrNone if successful, other error codes if failure.
*/
static OtaJobParseErr_t validateAndStartJob( OtaFileContext_t * pFileContext,
OtaFileContext_t ** pFinalFile,
bool * pUpdateJob );
/**
* @brief Parse the OTA job document, validate and return the populated OTA context if valid.
*
* @param[in] pJsonExpectedParams Structure to store the details of keys and where to store them.
* @param[in] numJobParams Number of parameters to be extracted.
* @param[in] pJson JSON job document.
* @param[in] messageLength Length of the job document.
* @param[in] pUpdateJob Represents if the job is accepted.
* @return OtaFileContext_t* File context to store file information.
*/
static OtaFileContext_t * parseJobDoc( const JsonDocParam_t * pJsonExpectedParams,
uint16_t numJobParams,
const char * pJson,
uint32_t messageLength,
bool * pUpdateJob );
/**
* @brief Validate block index and block size of the data block.
*
* @param[in] pFileContext Information of file to be streamed.
* @param[in] blockIndex Block index of incoming data block.
* @param[in] blockSize Block size of incoming data block.
* @return true if successful, false otherwise.
*/
static bool validateDataBlock( const OtaFileContext_t * pFileContext,
uint32_t blockIndex,
uint32_t blockSize );
/**
* @brief Decode and ingest the incoming data block.
*
* @param[in] pFileContext Information of file to be streamed.
* @param[in] pRawMsg Raw job document.
* @param[in] messageSize Length of document.
* @param[in] pPayload Data stored in the document.
* @param[out] pBlockSize Block size of incoming data block.
* @param[out] pBlockIndex Block index of incoming data block.
* @return IngestResult_t IngestResultAccepted_Continue if successful, other error for failure.
*/
static IngestResult_t decodeAndStoreDataBlock( OtaFileContext_t * pFileContext,
const uint8_t * pRawMsg,
uint32_t messageSize,
uint8_t ** pPayload,
uint32_t * pBlockSize,
uint32_t * pBlockIndex );
/**
* @brief Close an open OTA file context and free it.
*
* @param[in] pFileContext Information of file to be streamed.
* @return true if successful, false otherwise.
*/
static bool otaClose( OtaFileContext_t * const pFileContext );
/**
* @brief OTA Timer callback.
*
* @param[in] otaTimerId Reference to the timer to use.
*/
static void otaTimerCallback( OtaTimerId_t otaTimerId );
/**
* @brief Internal function to set the image state including an optional reason code.
*
* @param[in] stateToSet State to set.
* @param[in] reasonToSet Reason to set.
* @return OtaErr_t OtaErrNone if successful, other codes on failure.
*/
static OtaErr_t setImageStateWithReason( OtaImageState_t stateToSet,
uint32_t reasonToSet );
/**
* @brief Internal function to update the job status to the jobs service from current image state.
*
* @param[in] state State to set.
* @param[in] subReason Reason for status.
* @return OtaErr_t OtaErrNone if successful, other codes on failure.
*/
static OtaErr_t updateJobStatusFromImageState( OtaImageState_t state,
int32_t subReason );
/**
* @brief A helper function to cleanup resources during OTA agent shutdown.
*/
static void agentShutdownCleanup( void );
/**
* @brief A helper function to cleanup resources when data ingestion is complete.
*/
static void dataHandlerCleanup( void );
/**
* @brief Prepare the document model for use by sanity checking the initialization parameters and detecting all required parameters.
*
* @param[inout] pDocModel Details of expected parameters in the job doc.
* @param[in] pBodyDef Structure to store the details of keys and where to store them.
* @param[in] contextBaseAddr Start of file context.
* @param[in] contextSize Size of file context.
* @param[in] numJobParams Number of parameters to be extracted.
* @return DocParseErr_t DocParseErrNone if successful, JSON document parser errors.
*/
static DocParseErr_t initDocModel( JsonDocModel_t * pDocModel,
const JsonDocParam_t * pBodyDef,
void * contextBaseAddr,
uint32_t contextSize,
uint16_t numJobParams );
/**
* @brief Initialize buffers for storing the file attributes.
*
* @param[out] pOtaBuffer OTA Application buffers.
*/
static void initializeAppBuffers( OtaAppBuffer_t * pOtaBuffer );
/**
* @brief Initialize jobId and protocol buffers.
*/
static void initializeLocalBuffers( void );
/**
* @brief Search the state transition table for the entry based on current state and incoming event.
*
* @param[in] pEventMsg Incoming event information.
* @return uint32_t Index of the transition.
*/
static uint32_t searchTransition( const OtaEventMsg_t * pEventMsg );
/**
* @brief Initiate download if not in self-test else reboot
*
* @return OtaErr_t OtaErrNone if successful.
*/
static OtaErr_t processValidFileContext( void );
/**
* @brief Validate update version when receiving job doc in self test state.
*
* @param[in] pFileContext Stores file information.
*/
static void handleSelfTestJobDoc( OtaFileContext_t * pFileContext );
/**
* @brief Handle invalid file context.
*
* @return OtaErr_t OtaErrNone if job parsing is handled.
*/
static OtaErr_t processNullFileContext( void );
/**
* @brief Check if the platform is in self-test
*
* @return true if in self-test, else false.
*/
static bool platformInSelftest( void );
/**
* @brief Function to handle events that were unexpected in the current state.
*
* @param[in] pEventMsg Stores information of the event.
*/
static void handleUnexpectedEvents( const OtaEventMsg_t * pEventMsg );
/**
* @brief Free or clear multiple buffers used in the file context.
*
* @param[in] pFileContext Information of file to be streamed.
*/
static void freeFileContextMem( OtaFileContext_t * const pFileContext );
/**
* @brief Handle job parsing error.
*
* @param[in] pFileContext Pointer to the file context.
*
* @param[in] err Parsing error of type OtaJobParseErr_t.
*/
static void handleJobParsingError( const OtaFileContext_t * pFileContext,
OtaJobParseErr_t err );
/**
* @brief Receive and process the next available event from the event queue.
*
* Each event is processed based on the behavior defined in the OTA transition
* table. The state of the OTA state machine will be updated and the
* corresponding event handler will be called.
*/
static void receiveAndProcessOtaEvent( void );
/* OTA state event handler functions. */
static OtaErr_t startHandler( const OtaEventData_t * pEventData ); /*!< Start timers and initiate request for job document. */
static OtaErr_t requestJobHandler( const OtaEventData_t * pEventData ); /*!< Initiate a request for a job. */
static OtaErr_t processJobHandler( const OtaEventData_t * pEventData ); /*!< Update file context from job document. */
static OtaErr_t inSelfTestHandler( const OtaEventData_t * pEventData ); /*!< Handle self test. */
static OtaErr_t initFileHandler( const OtaEventData_t * pEventData ); /*!< Initialize and handle file transfer. */
static OtaErr_t processDataHandler( const OtaEventData_t * pEventData ); /*!< Process incoming data blocks. */
static OtaErr_t requestDataHandler( const OtaEventData_t * pEventData ); /*!< Request for data blocks. */
static OtaErr_t shutdownHandler( const OtaEventData_t * pEventData ); /*!< Shutdown OTA and cleanup. */
static OtaErr_t closeFileHandler( const OtaEventData_t * pEventData ); /*!< Close file opened for download. */
static OtaErr_t userAbortHandler( const OtaEventData_t * pEventData ); /*!< Handle user interrupt to abort task. */
static OtaErr_t suspendHandler( const OtaEventData_t * pEventData ); /*!< Handle suspend event for OTA agent. */
static OtaErr_t resumeHandler( const OtaEventData_t * pEventData ); /*!< Resume from a suspended state. */
static OtaErr_t jobNotificationHandler( const OtaEventData_t * pEventData ); /*!< Upon receiving a new job document cancel current job if present and initiate new download. */
static void executeHandler( uint32_t index,
const OtaEventMsg_t * const pEventMsg ); /*!< Execute the handler for selected index from the transition table. */
/**
* @brief This is THE OTA agent context and initialization state.
*/
static OtaAgentContext_t otaAgent =
{
OtaAgentStateStopped, /* state */
{ 0 }, /* pThingName */
{ 0 }, /* fileContext */
0, /* fileIndex */
0, /* serverFileID */
{ 0 }, /* pActiveJobName */
NULL, /* pClientTokenFromJob */
0, /* timestampFromJob */
OtaImageStateUnknown, /* imageState */
1, /* numOfBlocksToReceive */
{ 0 }, /* statistics */
0, /* requestMomentum */
NULL, /* pOtaInterface */
NULL, /* OtaAppCallback */
1 /* unsubscribe flag */
};
/**
* @brief Transition table for the OTA state machine.
*/
static OtaStateTableEntry_t otaTransitionTable[] =
{
/*STATE , EVENT , ACTION , NEXT STATE */
{ OtaAgentStateReady, OtaAgentEventStart, startHandler, OtaAgentStateRequestingJob },
{ OtaAgentStateRequestingJob, OtaAgentEventRequestJobDocument, requestJobHandler, OtaAgentStateWaitingForJob },
{ OtaAgentStateRequestingJob, OtaAgentEventRequestTimer, requestJobHandler, OtaAgentStateWaitingForJob },
{ OtaAgentStateWaitingForJob, OtaAgentEventReceivedJobDocument, processJobHandler, OtaAgentStateCreatingFile },
{ OtaAgentStateCreatingFile, OtaAgentEventStartSelfTest, inSelfTestHandler, OtaAgentStateWaitingForJob },
{ OtaAgentStateCreatingFile, OtaAgentEventCreateFile, initFileHandler, OtaAgentStateRequestingFileBlock },
{ OtaAgentStateCreatingFile, OtaAgentEventRequestTimer, initFileHandler, OtaAgentStateRequestingFileBlock },
{ OtaAgentStateRequestingFileBlock, OtaAgentEventRequestFileBlock, requestDataHandler, OtaAgentStateWaitingForFileBlock },
{ OtaAgentStateRequestingFileBlock, OtaAgentEventRequestTimer, requestDataHandler, OtaAgentStateWaitingForFileBlock },
{ OtaAgentStateWaitingForFileBlock, OtaAgentEventReceivedFileBlock, processDataHandler, OtaAgentStateWaitingForFileBlock },
{ OtaAgentStateWaitingForFileBlock, OtaAgentEventRequestTimer, requestDataHandler, OtaAgentStateWaitingForFileBlock },
{ OtaAgentStateWaitingForFileBlock, OtaAgentEventRequestFileBlock, requestDataHandler, OtaAgentStateWaitingForFileBlock },
{ OtaAgentStateWaitingForFileBlock, OtaAgentEventRequestJobDocument, requestJobHandler, OtaAgentStateWaitingForJob },
{ OtaAgentStateWaitingForFileBlock, OtaAgentEventReceivedJobDocument, jobNotificationHandler, OtaAgentStateRequestingJob },
{ OtaAgentStateWaitingForFileBlock, OtaAgentEventCloseFile, closeFileHandler, OtaAgentStateWaitingForJob },
{ OtaAgentStateSuspended, OtaAgentEventResume, resumeHandler, OtaAgentStateRequestingJob },
{ OtaAgentStateAll, OtaAgentEventSuspend, suspendHandler, OtaAgentStateSuspended },
{ OtaAgentStateAll, OtaAgentEventUserAbort, userAbortHandler, OtaAgentStateWaitingForJob },
{ OtaAgentStateAll, OtaAgentEventShutdown, shutdownHandler, OtaAgentStateStopped },
};
/* MISRA rule 2.2 warns about unused variables. These 2 variables are used in log messages, which is
* disabled when running static analysis. So it's a false positive. */
/* coverity[misra_c_2012_rule_2_2_violation] */
/*!< String set to represent the States of the OTA agent. */
static const char * pOtaAgentStateStrings[ OtaAgentStateAll + 1 ] =
{
"Init",
"Ready",
"RequestingJob",
"WaitingForJob",
"CreatingFile",
"RequestingFileBlock",
"WaitingForFileBlock",
"ClosingFile",
"Suspended",
"ShuttingDown",
"Stopped",
"All"
};
/* coverity[misra_c_2012_rule_2_2_violation] */
/*!< String set to represent the Events for the OTA agent. */
static const char * pOtaEventStrings[ OtaAgentEventMax ] =
{
"Start",
"StartSelfTest",
"RequestJobDocument",
"ReceivedJobDocument",
"CreateFile",
"RequestFileBlock",
"ReceivedFileBlock",
"RequestTimer",
"CloseFile",
"Suspend",
"Resume",
"UserAbort",
"Shutdown"
};
/**
* @brief This is the OTA job document model describing the parameters, their types, destination and how to extract.
*/
static const JsonDocParam_t otaJobDocModelParamStructure[ OTA_NUM_JOB_PARAMS ] =
{
{ OTA_JSON_CLIENT_TOKEN_KEY, OTA_JOB_PARAM_OPTIONAL, OTA_DONT_STORE_PARAM, OTA_DONT_STORE_PARAM, ModelParamTypeStringInDoc },
{ OTA_JSON_TIMESTAMP_KEY, OTA_JOB_PARAM_OPTIONAL, OTA_DONT_STORE_PARAM, OTA_DONT_STORE_PARAM, ModelParamTypeUInt32 },
{ OTA_JSON_EXECUTION_KEY, OTA_JOB_PARAM_REQUIRED, OTA_DONT_STORE_PARAM, OTA_DONT_STORE_PARAM, ModelParamTypeObject },
{ OTA_JSON_JOB_ID_KEY, OTA_JOB_PARAM_REQUIRED, U16_OFFSET( OtaFileContext_t, pJobName ), U16_OFFSET( OtaFileContext_t, jobNameMaxSize ), ModelParamTypeStringCopy},
{ OTA_JSON_STATUS_DETAILS_KEY, OTA_JOB_PARAM_OPTIONAL, OTA_DONT_STORE_PARAM, OTA_DONT_STORE_PARAM, ModelParamTypeObject },
{ OTA_JSON_SELF_TEST_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, isInSelfTest ), OTA_DONT_STORE_PARAM, ModelParamTypeIdent},
{ OTA_JSON_UPDATED_BY_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, updaterVersion ), OTA_DONT_STORE_PARAM, ModelParamTypeUInt32},
{ OTA_JSON_JOB_DOC_KEY, OTA_JOB_PARAM_REQUIRED, OTA_DONT_STORE_PARAM, OTA_DONT_STORE_PARAM, ModelParamTypeObject },
{ OTA_JSON_OTA_UNIT_KEY, OTA_JOB_PARAM_REQUIRED, OTA_DONT_STORE_PARAM, OTA_DONT_STORE_PARAM, ModelParamTypeObject },
{ OTA_JSON_STREAM_NAME_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, pStreamName ), U16_OFFSET( OtaFileContext_t, streamNameMaxSize ), ModelParamTypeStringCopy},
{ OTA_JSON_PROTOCOLS_KEY, OTA_JOB_PARAM_REQUIRED, U16_OFFSET( OtaFileContext_t, pProtocols ), U16_OFFSET( OtaFileContext_t, protocolMaxSize ), ModelParamTypeArrayCopy},
{ OTA_JSON_FILE_GROUP_KEY, OTA_JOB_PARAM_REQUIRED, OTA_STORE_NESTED_JSON, OTA_STORE_NESTED_JSON, ModelParamTypeArray },
{ OTA_JSON_FILE_PATH_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, pFilePath ), U16_OFFSET( OtaFileContext_t, filePathMaxSize ), ModelParamTypeStringCopy},
{ OTA_JSON_FILE_SIZE_KEY, OTA_JOB_PARAM_REQUIRED, U16_OFFSET( OtaFileContext_t, fileSize ), OTA_DONT_STORE_PARAM, ModelParamTypeUInt32},
{ OTA_JSON_FILE_ID_KEY, OTA_JOB_PARAM_REQUIRED, U16_OFFSET( OtaFileContext_t, serverFileID ), OTA_DONT_STORE_PARAM, ModelParamTypeUInt32},
{ OTA_JSON_FILE_CERT_NAME_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, pCertFilepath ), U16_OFFSET( OtaFileContext_t, certFilePathMaxSize ), ModelParamTypeStringCopy},
{ OTA_JSON_UPDATE_DATA_URL_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, pUpdateUrlPath ), U16_OFFSET( OtaFileContext_t, updateUrlMaxSize ), ModelParamTypeStringCopy},
{ OTA_JSON_AUTH_SCHEME_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, pAuthScheme ), U16_OFFSET( OtaFileContext_t, authSchemeMaxSize ), ModelParamTypeStringCopy},
{ OTA_JsonFileSignatureKey, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, pSignature ), OTA_DONT_STORE_PARAM, ModelParamTypeSigBase64},
{ OTA_JSON_FILE_ATTRIBUTE_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, fileAttributes ), OTA_DONT_STORE_PARAM, ModelParamTypeUInt32},
{ OTA_JSON_FILETYPE_KEY, OTA_JOB_PARAM_OPTIONAL, U16_OFFSET( OtaFileContext_t, fileType ), OTA_DONT_STORE_PARAM, ModelParamTypeUInt32}
};
static uint8_t pJobNameBuffer[ OTA_JOB_ID_MAX_SIZE ]; /*!< Buffer to store job name. */
static uint8_t pProtocolBuffer[ OTA_PROTOCOL_BUFFER_SIZE ]; /*!< Buffer to store data protocol. */
static Sig256_t sig256Buffer; /*!< Buffer to store key file signature. */
static void otaTimerCallback( OtaTimerId_t otaTimerId )
{
assert( ( otaTimerId == OtaRequestTimer ) || ( otaTimerId == OtaSelfTestTimer ) );
if( otaTimerId == OtaRequestTimer )
{
OtaEventMsg_t xEventMsg = { 0 };
LogDebug( ( "Self-test expired within %ums",
otaconfigFILE_REQUEST_WAIT_MS ) );
xEventMsg.eventId = OtaAgentEventRequestTimer;
/* Send request timer event. */
if( OTA_SignalEvent( &xEventMsg ) == false )
{
LogError( ( "Failed to signal the OTA Agent to start request timer" ) );
}
}
else /* ( otaTimerId == OtaSelfTestTimer ) */
{
LogError( ( "Self test failed to complete within %ums",
otaconfigSELF_TEST_RESPONSE_WAIT_MS ) );
( void ) otaAgent.pOtaInterface->pal.reset( &otaAgent.fileContext );
}
}
static bool platformInSelftest( void )
{
bool selfTest = false;
/*
* Get the platform state from the OTA pal layer.
*/
if( otaAgent.pOtaInterface->pal.getPlatformImageState( &( otaAgent.fileContext ) ) == OtaPalImageStatePendingCommit )
{
selfTest = true;
}
return selfTest;
}
static OtaErr_t updateJobStatusFromImageState( OtaImageState_t state,
int32_t subReason )
{
OtaErr_t err = OtaErrNone;
OtaJobReason_t reason = JobReasonReceiving;
if( state == OtaImageStateTesting )
{
/* We discovered we're ready for test mode, put job status in self_test active. */
err = otaControlInterface.updateJobStatus( &otaAgent,
JobStatusInProgress,
JobReasonSelfTestActive,
0 );
}
else
{
if( state == OtaImageStateAccepted )
{
/* Now that we have accepted the firmware update, we can complete the job. */
err = otaControlInterface.updateJobStatus( &otaAgent,
JobStatusSucceeded,
JobReasonAccepted,
appFirmwareVersion.u.signedVersion32 );
}
else
{
/*
* The firmware update was either rejected or aborted, complete the job as FAILED (Job service
* will not allow us to set REJECTED after the job has been started already).
*/
reason = ( state == OtaImageStateRejected ) ? JobReasonRejected : JobReasonAborted;
err = otaControlInterface.updateJobStatus( &otaAgent,
JobStatusFailed,
reason,
subReason );
}
/*
* We don't need the job name memory anymore since we're done with this job.
*/
( void ) memset( otaAgent.pActiveJobName, 0, OTA_JOB_ID_MAX_SIZE );
}
return err;
}
static OtaErr_t setImageStateWithReason( OtaImageState_t stateToSet,
uint32_t reasonToSet )
{
OtaErr_t err = OtaErrNone;
OtaImageState_t state = stateToSet;
uint32_t reason = reasonToSet;
OtaPalStatus_t palStatus;
/* Call the platform specific code to set the image state. */
palStatus = otaAgent.pOtaInterface->pal.setPlatformImageState( &( otaAgent.fileContext ), state );
/*
* If the platform image state couldn't be set correctly, force fail the update by setting the
* image state to "Rejected" unless it's already in "Aborted".
*/
if( ( OTA_PAL_MAIN_ERR( palStatus ) != OtaPalSuccess ) && ( state != OtaImageStateAborted ) )
{
/* Intentionally override state since we failed within this function. */
state = OtaImageStateRejected;
/*
* Capture the failure reason if not already set (and we're not already Aborted as checked above). Otherwise Keep
* the original reject reason code since it is possible for the PAL to fail to update the image state in some
* cases (e.g. a reset already caused the bundle rollback and we failed to rollback again).
*/
if( reason == 0U )
{
/* Intentionally override reason since we failed within this function. */
reason = palStatus;
}
}
/* Now update the image state and job status on service side. */
otaAgent.imageState = state;
if( strlen( ( const char * ) otaAgent.pActiveJobName ) > 0u )
{
err = updateJobStatusFromImageState( state, ( int32_t ) reason );
}
else
{
err = OtaErrNoActiveJob;
}
if( err != OtaErrNone )
{
LogWarn( ( "Failed to set image state with reason: "
"OtaErr_t=%s"
", OtaPalStatus_t=%s"
", state=%d"
", reason=%d",
OTA_Err_strerror( err ),
OTA_PalStatus_strerror( OTA_PAL_MAIN_ERR( palStatus ) ),
stateToSet,
reasonToSet ) );
}
return err;
}
static OtaErr_t startHandler( const OtaEventData_t * pEventData )
{
OtaErr_t retVal = OtaErrNone;
OtaEventMsg_t eventMsg = { 0 };
( void ) pEventData;
/* Start self-test timer, if platform is in self-test. */
if( platformInSelftest() == true )
{
( void ) otaAgent.pOtaInterface->os.timer.start( OtaSelfTestTimer,
"OtaSelfTestTimer",
otaconfigSELF_TEST_RESPONSE_WAIT_MS,
otaTimerCallback );
}
/* Send event to OTA task to get job document. */
eventMsg.eventId = OtaAgentEventRequestJobDocument;
if( OTA_SignalEvent( &eventMsg ) == false )
{
retVal = OtaErrSignalEventFailed;
}
return retVal;
}
static OtaErr_t inSelfTestHandler( const OtaEventData_t * pEventData )
{
OtaErr_t err = OtaErrNone;
( void ) pEventData;
LogInfo( ( "Beginning self-test." ) );
/* Check the platform's OTA update image state. It should also be in self test. */
if( platformInSelftest() == true )
{
/* Callback for application specific self-test. */
otaAgent.OtaAppCallback( OtaJobEventStartTest, NULL );
/* Clear self-test flag. */
otaAgent.fileContext.isInSelfTest = false;
/* Stop the self test timer as it is no longer required. */
( void ) otaAgent.pOtaInterface->os.timer.stop( OtaSelfTestTimer );
}
else
{
/* The job is in self test but the platform image state is not so it could be
* an attack on the platform image state. Reject the update (this should also
* cause the image to be erased), aborting the job and reset the device. */
LogWarn( ( "Rejecting new image and rebooting:"
"The job is in the self-test state while the platform is not." ) );
err = setImageStateWithReason( OtaImageStateRejected, ( uint32_t ) OtaErrImageStateMismatch );
( void ) otaAgent.pOtaInterface->pal.reset( &( otaAgent.fileContext ) );
}
if( err != OtaErrNone )
{
LogError( ( "Failed to start self-test: "
"OtaErr_t=%s",
OTA_Err_strerror( err ) ) );
}
return err;
}
static OtaErr_t requestJobHandler( const OtaEventData_t * pEventData )
{
OtaErr_t retVal = OtaErrUninitialized;
OtaOsStatus_t osErr = OtaOsSuccess;
OtaEventMsg_t eventMsg = { 0 };
( void ) pEventData;
/*
* Check if any pending jobs are available from job service.
*/
retVal = otaControlInterface.requestJob( &otaAgent );
if( retVal != OtaErrNone )
{
if( otaAgent.requestMomentum < otaconfigMAX_NUM_REQUEST_MOMENTUM )
{
/* Start the request timer. */
osErr = otaAgent.pOtaInterface->os.timer.start( OtaRequestTimer,
"OtaRequestTimer",
otaconfigFILE_REQUEST_WAIT_MS,
otaTimerCallback );
if( osErr != OtaOsSuccess )
{
LogError( ( "Failed to start request timer: "
"OtaOsStatus_t=%s",
OTA_OsStatus_strerror( osErr ) ) );
retVal = OtaErrRequestJobFailed;
}
else
{
otaAgent.requestMomentum++;
}
}
else
{
/* Stop the request timer. */
( void ) otaAgent.pOtaInterface->os.timer.stop( OtaRequestTimer );
/* Send shutdown event to the OTA Agent task. */
eventMsg.eventId = OtaAgentEventShutdown;
if( OTA_SignalEvent( &eventMsg ) == false )
{
retVal = OtaErrSignalEventFailed;
}
else
{
/* Too many requests have been sent without a response or too many failures
* when trying to publish the request message. Abort. */
retVal = OtaErrMomentumAbort;
}
}
}
else
{
/* Stop the request timer. */
( void ) otaAgent.pOtaInterface->os.timer.stop( OtaRequestTimer );
/* Reset the request momentum. */
otaAgent.requestMomentum = 0;
}
return retVal;
}
static OtaErr_t processNullFileContext( void )
{
OtaErr_t retVal = OtaErrNone;
OtaEventMsg_t eventMsg = { 0 };
/* If the OTA job is in the self_test state, alert the application layer. */
if( OTA_GetImageState() == OtaImageStateTesting )
{
/* Send event to OTA task to start self-test. */
eventMsg.eventId = OtaAgentEventStartSelfTest;
if( OTA_SignalEvent( &eventMsg ) == false )
{
retVal = OtaErrSignalEventFailed;
}
}
else
{
/*
* If the job context returned NULL and the image state is not in the self_test state,
* then an error occurred parsing the OTA job message. */
retVal = OtaErrJobParserError;
}
return retVal;
}
static OtaErr_t processValidFileContext( void )
{
OtaErr_t retVal = OtaErrNone;
OtaEventMsg_t eventMsg = { 0 };
/* If the platform is not in the self_test state, initiate file download. */
if( platformInSelftest() == false )
{
/* Init data interface routines */
retVal = setDataInterface( &otaDataInterface, otaAgent.fileContext.pProtocols );
if( retVal == OtaErrNone )
{
LogInfo( ( "Setting OTA data interface." ) );
/* Received a valid context so send event to request file blocks. */
eventMsg.eventId = OtaAgentEventCreateFile;
/*Send the event to OTA Agent task. */
if( OTA_SignalEvent( &eventMsg ) == false )
{
retVal = OtaErrSignalEventFailed;
}
}
else
{
/*
* Failed to set the data interface so abort the OTA.If there is a valid job id,
* then a job status update will be sent.
*/
LogError( ( "Failed to set OTA data interface: OtaErr_t=%s, aborting current update.", OTA_Err_strerror( retVal ) ) );
retVal = setImageStateWithReason( OtaImageStateAborted, ( uint32_t ) retVal );
if( retVal != OtaErrNone )
{
LogError( ( "Failed to abort OTA update: OtaErr_t=%s", OTA_Err_strerror( retVal ) ) );
}
}
}
else
{
/*
* Received a job that is not in self-test but platform is, so reboot the device to allow
* roll back to previous image.
*/
LogWarn( ( "Rejecting new image and rebooting:"
"The platform is in the self-test state while the job is not." ) );
( void ) otaAgent.pOtaInterface->pal.reset( &( otaAgent.fileContext ) );
}
return retVal;
}
static OtaErr_t processJobHandler( const OtaEventData_t * pEventData )
{
OtaErr_t retVal = OtaErrNone;
OtaFileContext_t * pOtaFileContext = NULL;
/*
* Parse the job document and update file information in the file context.
*/
pOtaFileContext = getFileContextFromJob( ( const char * ) pEventData->data,
pEventData->dataLength );
/*
* A null context here could either mean we didn't receive a valid job or it could
* signify that we're in the self test phase (where the OTA file transfer is already
* completed and we have reset the device and are now running the new firmware). We
* will check the state to determine which case we're in.
*/
if( pOtaFileContext == NULL )
{
retVal = processNullFileContext();
}