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Bump backoffAlgorithm submodule for API change and update demos (#426)

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The API of FreeRTOS/backoffAlgorithm library has changed to remove dependency on random number generator; instead require the caller to generate the random number and pass it to the BackoffAlgorithm_GetNextBackoff API for backoff period calculation. This PR updates the submodule pointer commit, and updates the demos and tests to use the simplied library API
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Archit Aggarwal 2020-11-30 11:12:07 -08:00 • committed by GitHub
parent 220dd5cc1c
commit 682447445b
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9 changed files with 121 additions and 287 deletions
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17
FreeRTOS-Plus/Demo/AWS/Mqtt_Demo_Helpers/mqtt_demo_helpers.c
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@ -359,15 +359,11 @@ static TlsTransportStatus_t prvConnectToServerWithBackoffRetries( NetworkContext
#endif
xNetworkCredentials.pAlpnProtos = pcAlpnProtocols;
/* Initialize reconnect attempts and interval.
* Note: This utility uses a pseudo random number generator for use with the backoff
* algorithm. However, it is recommended to use a True Random Number generator to
* avoid possibility of collisions between multiple devices retrying connection. */
/* Initialize reconnect attempts and interval.*/
BackoffAlgorithm_InitializeParams( &xReconnectParams,
RETRY_BACKOFF_BASE_MS,
RETRY_MAX_BACKOFF_DELAY_MS,
RETRY_MAX_ATTEMPTS,
prvGenerateRandomNumber );
RETRY_MAX_ATTEMPTS );
/* Attempt to connect to MQTT broker. If connection fails, retry after
* a timeout. Timeout value will exponentially increase until maximum
@ -390,9 +386,12 @@ static TlsTransportStatus_t prvConnectToServerWithBackoffRetries( NetworkContext
if( xNetworkStatus != TLS_TRANSPORT_SUCCESS )
{
/* Get back-off value (in milliseconds) for the next connection retry. */
xBackoffAlgStatus = BackoffAlgorithm_GetNextBackoff( &xReconnectParams, &usNextRetryBackOff );
configASSERT( xBackoffAlgStatus != BackoffAlgorithmRngFailure );
/* Generate a random number and calculate backoff value (in milliseconds) for
* the next connection retry.
* Note: It is recommended to seed the random number generator with a device-specific
* entropy source so that possibility of multiple devices retrying failed network operations
* at similar intervals can be avoided. */
xBackoffAlgStatus = BackoffAlgorithm_GetNextBackoff( &xReconnectParams, uxRand(), &usNextRetryBackOff );
if( xBackoffAlgStatus == BackoffAlgorithmRetriesExhausted )
{