defender.h

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/*
 * AWS IoT Device Defender Client v1.0.0
 * Copyright (C) 2020 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.
 */
 
#ifndef DEFENDER_H_
#define DEFENDER_H_
 
/* Standard includes. */
#include <stdint.h>
 
/* DEFENDER_DO_NOT_USE_CUSTOM_CONFIG allows building the Device Defender library
 * without a config file. If a config file is provided, DEFENDER_DO_NOT_USE_CUSTOM_CONFIG
 * macro must not be defined.
 */
#ifndef DEFENDER_DO_NOT_USE_CUSTOM_CONFIG
    #include "defender_config.h"
#endif
 
/* Default config values. */
#include "defender_config_defaults.h"
 
typedef enum
{
    DefenderError = 0,     
    DefenderSuccess,       
    DefenderNoMatch,       
    DefenderBadParameter,  
    DefenderBufferTooSmall 
} DefenderStatus_t;
 
typedef enum
{
    DefenderInvalidTopic = -1,  
    DefenderJsonReportPublish,  
    DefenderJsonReportAccepted, 
    DefenderJsonReportRejected, 
    DefenderCborReportPublish,  
    DefenderCborReportAccepted, 
    DefenderCborReportRejected, 
    DefenderMaxTopic
} DefenderTopic_t;
 
/*-----------------------------------------------------------*/
 
#define STRING_LITERAL_LENGTH( literal )    ( ( uint16_t ) ( sizeof( literal ) - 1U ) )
 
/*-----------------------------------------------------------*/
 
#define DEFENDER_THINGNAME_MAX_LENGTH         128U
 
#define DEFENDER_REPORT_MIN_PERIOD_SECONDS    300
 
/*-----------------------------------------------------------*/
 
/*
 * A Defender topic has the following format:
 *
 * <Prefix><Thing Name><Bridge><Report Format><Suffix>
 *
 * Where:
 * <Prefix> = $aws/things/
 * <Thing Name> = Name of the thing.
 * <Bridge> = /defender/metrics/
 * <Report Format> = json or cbor
 * <Suffix> = /accepted or /rejected or empty
 *
 * Examples:
 * $aws/things/THING_NAME/defender/metrics/json
 * $aws/things/THING_NAME/defender/metrics/json/accepted
 * $aws/things/THING_NAME/defender/metrics/json/rejected
 * $aws/things/THING_NAME/defender/metrics/cbor
 * $aws/things/THING_NAME/defender/metrics/cbor/accepted
 * $aws/things/THING_NAME/defender/metrics/json/rejected
 */
 
#define DEFENDER_API_PREFIX                    "$aws/things/"
#define DEFENDER_API_LENGTH_PREFIX             STRING_LITERAL_LENGTH( DEFENDER_API_PREFIX )
 
#define DEFENDER_API_BRIDGE                    "/defender/metrics/"
#define DEFENDER_API_LENGTH_BRIDGE             STRING_LITERAL_LENGTH( DEFENDER_API_BRIDGE )
 
#define DEFENDER_API_JSON_FORMAT               "json"
#define DEFENDER_API_LENGTH_JSON_FORMAT        STRING_LITERAL_LENGTH( DEFENDER_API_JSON_FORMAT )
 
#define DEFENDER_API_CBOR_FORMAT               "cbor"
#define DEFENDER_API_LENGTH_CBOR_FORMAT        STRING_LITERAL_LENGTH( DEFENDER_API_CBOR_FORMAT )
 
#define DEFENDER_API_ACCEPTED_SUFFIX           "/accepted"
#define DEFENDER_API_LENGTH_ACCEPTED_SUFFIX    STRING_LITERAL_LENGTH( DEFENDER_API_ACCEPTED_SUFFIX )
 
#define DEFENDER_API_REJECTED_SUFFIX           "/rejected"
#define DEFENDER_API_LENGTH_REJECTED_SUFFIX    STRING_LITERAL_LENGTH( DEFENDER_API_REJECTED_SUFFIX )
 
#define DEFENDER_API_NULL_SUFFIX               ""
#define DEFENDER_API_LENGTH_NULL_SUFFIX        ( 0U )
 
/*-----------------------------------------------------------*/
 
/* Defender API topic lengths. */
#define DEFENDER_API_COMMON_LENGTH( thingNameLength, reportFormatLength, suffixLength ) \
    ( DEFENDER_API_LENGTH_PREFIX +                                                      \
      ( thingNameLength ) +                                                             \
      DEFENDER_API_LENGTH_BRIDGE +                                                      \
      ( reportFormatLength ) +                                                          \
      ( suffixLength ) )
 
#define DEFENDER_API_LENGTH_JSON_PUBLISH( thingNameLength )      \
    DEFENDER_API_COMMON_LENGTH( thingNameLength,                 \
                                DEFENDER_API_LENGTH_JSON_FORMAT, \
                                DEFENDER_API_LENGTH_NULL_SUFFIX )
 
#define DEFENDER_API_LENGTH_JSON_ACCEPTED( thingNameLength )     \
    DEFENDER_API_COMMON_LENGTH( thingNameLength,                 \
                                DEFENDER_API_LENGTH_JSON_FORMAT, \
                                DEFENDER_API_LENGTH_ACCEPTED_SUFFIX )
 
#define DEFENDER_API_LENGTH_JSON_REJECTED( thingNameLength )     \
    DEFENDER_API_COMMON_LENGTH( thingNameLength,                 \
                                DEFENDER_API_LENGTH_JSON_FORMAT, \
                                DEFENDER_API_LENGTH_REJECTED_SUFFIX )
 
#define DEFENDER_API_LENGTH_CBOR_PUBLISH( thingNameLength )      \
    DEFENDER_API_COMMON_LENGTH( thingNameLength,                 \
                                DEFENDER_API_LENGTH_CBOR_FORMAT, \
                                DEFENDER_API_LENGTH_NULL_SUFFIX )
 
#define DEFENDER_API_LENGTH_CBOR_ACCEPTED( thingNameLength )     \
    DEFENDER_API_COMMON_LENGTH( thingNameLength,                 \
                                DEFENDER_API_LENGTH_CBOR_FORMAT, \
                                DEFENDER_API_LENGTH_ACCEPTED_SUFFIX )
 
#define DEFENDER_API_LENGTH_CBOR_REJECTED( thingNameLength )     \
    DEFENDER_API_COMMON_LENGTH( thingNameLength,                 \
                                DEFENDER_API_LENGTH_CBOR_FORMAT, \
                                DEFENDER_API_LENGTH_REJECTED_SUFFIX )
 
#define DEFENDER_API_MAX_LENGTH( thingNameLength ) \
    DEFENDER_API_LENGTH_CBOR_ACCEPTED( thingNameLength )
 
/*-----------------------------------------------------------*/
 
/* Defender API topics. */
#define DEFENDER_API_COMMON( thingName, reportFormat, suffix ) \
    ( DEFENDER_API_PREFIX                                      \
      thingName                                                \
      DEFENDER_API_BRIDGE                                      \
      reportFormat                                             \
      suffix )
 
#define DEFENDER_API_JSON_PUBLISH( thingName )     \
    DEFENDER_API_COMMON( thingName,                \
                         DEFENDER_API_JSON_FORMAT, \
                         DEFENDER_API_NULL_SUFFIX )
 
#define DEFENDER_API_JSON_ACCEPTED( thingName )    \
    DEFENDER_API_COMMON( thingName,                \
                         DEFENDER_API_JSON_FORMAT, \
                         DEFENDER_API_ACCEPTED_SUFFIX )
 
#define DEFENDER_API_JSON_REJECTED( thingName )    \
    DEFENDER_API_COMMON( thingName,                \
                         DEFENDER_API_JSON_FORMAT, \
                         DEFENDER_API_REJECTED_SUFFIX )
 
#define DEFENDER_API_CBOR_PUBLISH( thingName )     \
    DEFENDER_API_COMMON( thingName,                \
                         DEFENDER_API_CBOR_FORMAT, \
                         DEFENDER_API_NULL_SUFFIX )
 
#define DEFENDER_API_CBOR_ACCEPTED( thingName )    \
    DEFENDER_API_COMMON( thingName,                \
                         DEFENDER_API_CBOR_FORMAT, \
                         DEFENDER_API_ACCEPTED_SUFFIX )
 
#define DEFENDER_API_CBOR_REJECTED( thingName )    \
    DEFENDER_API_COMMON( thingName,                \
                         DEFENDER_API_CBOR_FORMAT, \
                         DEFENDER_API_REJECTED_SUFFIX )
 
/*-----------------------------------------------------------*/
 
/* Keys used in defender report. */
#if ( defined( DEFENDER_USE_LONG_KEYS ) && ( DEFENDER_USE_LONG_KEYS == 1 ) )
    #define DEFENDER_REPORT_SELECT_KEY( longKey, shortKey )    ( longKey )
#else
    #define DEFENDER_REPORT_SELECT_KEY( longKey, shortKey )    ( shortKey )
#endif
 
#define DEFENDER_REPORT_HEADER_KEY                            DEFENDER_REPORT_SELECT_KEY( "header", "hed" )
 
#define DEFENDER_REPORT_LENGTH_HEADER_KEY                     STRING_LITERAL_LENGTH( DEFENDER_REPORT_HEADER_KEY )
 
#define DEFENDER_REPORT_METRICS_KEY                           DEFENDER_REPORT_SELECT_KEY( "metrics", "met" )
 
#define DEFENDER_REPORT_LENGTH_METRICS_KEY                    STRING_LITERAL_LENGTH( DEFENDER_REPORT_METRICS_KEY )
 
#define DEFENDER_REPORT_ID_KEY                                DEFENDER_REPORT_SELECT_KEY( "report_id", "rid" )
 
#define DEFENDER_REPORT_LENGTH_ID_KEY                         STRING_LITERAL_LENGTH( DEFENDER_REPORT_ID_KEY )
 
#define DEFENDER_REPORT_VERSION_KEY                           DEFENDER_REPORT_SELECT_KEY( "version", "v" )
 
#define DEFENDER_REPORT_LENGTH_VERSION_KEY                    STRING_LITERAL_LENGTH( DEFENDER_REPORT_VERSION_KEY )
 
#define DEFENDER_REPORT_TCP_CONNECTIONS_KEY                   DEFENDER_REPORT_SELECT_KEY( "tcp_connections", "tc" )
 
#define DEFENDER_REPORT_LENGTH_TCP_CONNECTIONS_KEY            STRING_LITERAL_LENGTH( DEFENDER_REPORT_TCP_CONNECTIONS_KEY )
 
#define DEFENDER_REPORT_ESTABLISHED_CONNECTIONS_KEY           DEFENDER_REPORT_SELECT_KEY( "established_connections", "ec" )
 
#define DEFENDER_REPORT_LENGTH_ESTABLISHED_CONNECTIONS_KEY    STRING_LITERAL_LENGTH( DEFENDER_REPORT_ESTABLISHED_CONNECTIONS_KEY )
 
#define DEFENDER_REPORT_CONNECTIONS_KEY                       DEFENDER_REPORT_SELECT_KEY( "connections", "cs" )
 
#define DEFENDER_REPORT_LENGTH_CONNECTIONS_KEY                STRING_LITERAL_LENGTH( DEFENDER_REPORT_CONNECTIONS_KEY )
 
#define DEFENDER_REPORT_REMOTE_ADDR_KEY                       DEFENDER_REPORT_SELECT_KEY( "remote_addr", "rad" )
 
#define DEFENDER_REPORT_LENGTH_REMOTE_ADDR_KEY                STRING_LITERAL_LENGTH( DEFENDER_REPORT_REMOTE_ADDR_KEY )
 
#define DEFENDER_REPORT_LOCAL_PORT_KEY                        DEFENDER_REPORT_SELECT_KEY( "local_port", "lp" )
 
#define DEFENDER_REPORT_LENGTH_LOCAL_PORT_KEY                 STRING_LITERAL_LENGTH( DEFENDER_REPORT_LOCAL_PORT_KEY )
 
#define DEFENDER_REPORT_LOCAL_INTERFACE_KEY                   DEFENDER_REPORT_SELECT_KEY( "local_interface", "li" )
 
#define DEFENDER_REPORT_LENGTH_LOCAL_INTERFACE_KEY            STRING_LITERAL_LENGTH( DEFENDER_REPORT_LOCAL_INTERFACE_KEY )
 
#define DEFENDER_REPORT_TOTAL_KEY                             DEFENDER_REPORT_SELECT_KEY( "total", "t" )
 
#define DEFENDER_REPORT_LENGTH_TOTAL_KEY                      STRING_LITERAL_LENGTH( DEFENDER_REPORT_TOTAL_KEY )
 
#define DEFENDER_REPORT_TCP_LISTENING_PORTS_KEY               DEFENDER_REPORT_SELECT_KEY( "listening_tcp_ports", "tp" )
 
#define DEFENDER_REPORT_LENGTH_TCP_LISTENING_PORTS_KEY        STRING_LITERAL_LENGTH( DEFENDER_REPORT_TCP_LISTENING_PORTS_KEY )
 
#define DEFENDER_REPORT_PORTS_KEY                             DEFENDER_REPORT_SELECT_KEY( "ports", "pts" )
 
#define DEFENDER_REPORT_LENGTH_PORTS_KEY                      STRING_LITERAL_LENGTH( DEFENDER_REPORT_PORTS_KEY )
 
#define DEFENDER_REPORT_PORT_KEY                              DEFENDER_REPORT_SELECT_KEY( "port", "pt" )
 
#define DEFENDER_REPORT_LENGTH_PORT_KEY                       STRING_LITERAL_LENGTH( DEFENDER_REPORT_PORT_KEY )
 
#define DEFENDER_REPORT_INTERFACE_KEY                         DEFENDER_REPORT_SELECT_KEY( "interface", "if" )
 
#define DEFENDER_REPORT_LENGTH_INTERFACE_KEY                  STRING_LITERAL_LENGTH( DEFENDER_REPORT_INTERFACE_KEY )
 
#define DEFENDER_REPORT_UDP_LISTENING_PORTS_KEY               DEFENDER_REPORT_SELECT_KEY( "listening_udp_ports", "up" )
 
#define DEFENDER_REPORT_LENGTH_UDP_LISTENING_PORTS_KEY        STRING_LITERAL_LENGTH( DEFENDER_REPORT_UDP_LISTENING_PORTS_KEY )
 
#define DEFENDER_REPORT_NETWORK_STATS_KEY                     DEFENDER_REPORT_SELECT_KEY( "network_stats", "ns" )
 
#define DEFENDER_REPORT_LENGTH_NETWORK_STATS_KEY              STRING_LITERAL_LENGTH( DEFENDER_REPORT_NETWORK_STATS_KEY )
 
#define DEFENDER_REPORT_BYTES_IN_KEY                          DEFENDER_REPORT_SELECT_KEY( "bytes_in", "bi" )
 
#define DEFENDER_REPORT_LENGTH_BYTES_IN_KEY                   STRING_LITERAL_LENGTH( DEFENDER_REPORT_BYTES_IN_KEY )
 
#define DEFENDER_REPORT_BYTES_OUT_KEY                         DEFENDER_REPORT_SELECT_KEY( "bytes_out", "bo" )
 
#define DEFENDER_REPORT_LENGTH_BYTES_OUT_KEY                  STRING_LITERAL_LENGTH( DEFENDER_REPORT_BYTES_OUT_KEY )
 
#define DEFENDER_REPORT_PKTS_IN_KEY                           DEFENDER_REPORT_SELECT_KEY( "packets_in", "pi" )
 
#define DEFENDER_REPORT_LENGTH_PKTS_IN_KEY                    STRING_LITERAL_LENGTH( DEFENDER_REPORT_PKTS_IN_KEY )
 
#define DEFENDER_REPORT_PKTS_OUT_KEY                          DEFENDER_REPORT_SELECT_KEY( "packets_out", "po" )
 
#define DEFENDER_REPORT_LENGTH_PKS_OUT_KEY                    STRING_LITERAL_LENGTH( DEFENDER_REPORT_LENGTH_PKS_OUT_KEY )
 
/*-----------------------------------------------------------*/
 
/* @[declare_defender_gettopic] */
DefenderStatus_t Defender_GetTopic( char * pBuffer,
                                    uint16_t bufferLength,
                                    const char * pThingName,
                                    uint16_t thingNameLength,
                                    DefenderTopic_t api,
                                    uint16_t * pOutLength );
/* @[declare_defender_gettopic] */
 
/*-----------------------------------------------------------*/
 
/* @[declare_defender_matchtopic] */
DefenderStatus_t Defender_MatchTopic( const char * pTopic,
                                      uint16_t topicLength,
                                      DefenderTopic_t * pOutApi,
                                      const char ** ppOutThingName,
                                      uint16_t * pOutThingNameLength );
/* @[declare_defender_matchtopic] */
 
/*-----------------------------------------------------------*/
 
#endif /* DEFENDER_H_ */