/* * Amazon FreeRTOS Device Defender Agent V1.0.2 * Copyright (C) 2018 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. * * http://aws.amazon.com/freertos * http://www.FreeRTOS.org */ #include "aws_defender_internals.h" #include "FreeRTOS.h" static int32_t lReportId; const char * pcDEFENDER_METRICS_VERSION = "1.0"; /* * Returns a non-crypto, but random number for initializing the report ID * This helps to prevent duplicate report IDs from the same device after POR */ static uint32_t prvDEFENDER_ReportIdInit( void ) { uint32_t ulId = configRAND32(); ulId >>= 2; /*Strip off top two bits to avoid overflow*/ return ulId; } CBORHandle_t GetHeader( void ) { lReportId = lReportId == 0 ? prvDEFENDER_ReportIdInit() : lReportId; CBORHandle_t xHeader = CBOR_New( 0 ); CBOR_AssignKeyWithInt( xHeader, DEFENDER_REPORT_ID_TAG, ++lReportId ); CBOR_AssignKeyWithString( xHeader, DEFENDER_VERSION_TAG, pcDEFENDER_METRICS_VERSION ); return xHeader; } int32_t GetLastReportId( void ) { return lReportId; }