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azure-sdk-for-c-arduino
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change is_span_empty

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Dane Walton 2022-03-29 19:08:43 -07:00
Родитель 4c642f2cd6
Коммит a285a5765a
5 изменённых файлов: 70 добавлений и 88 удалений
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68
examples/Azure_IoT_Central_ESP32/AzureIoT.cpp
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@ -73,7 +73,7 @@ static int get_mqtt_client_config_for_iot_hub(azure_iot_t* azure_iot, mqtt_clien
static az_span generate_dps_register_custom_property(az_span model_id, az_span data_buffer, az_span* remainder); static az_span generate_dps_register_custom_property(az_span model_id, az_span data_buffer, az_span* remainder);
#define is_device_provisioned(azure_iot) \ #define is_device_provisioned(azure_iot) \
(!is_az_span_empty(azure_iot->config->iot_hub_fqdn) && !is_az_span_empty(azure_iot->config->device_id)) (!az_span_is_content_equal(azure_iot->config->iot_hub_fqdn, AZ_SPAN_EMPTY) && !az_span_is_content_equal(azure_iot->config->device_id, AZ_SPAN_EMPTY))
/* --- Public API --- */ /* --- Public API --- */
void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config) void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config)
@ -82,8 +82,8 @@ void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config
_az_PRECONDITION_NOT_NULL(azure_iot_config); _az_PRECONDITION_NOT_NULL(azure_iot_config);
if (azure_iot_config->use_device_provisioning) if (azure_iot_config->use_device_provisioning)
{ {
_az_PRECONDITION(is_az_span_empty(azure_iot_config->iot_hub_fqdn)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->iot_hub_fqdn, AZ_SPAN_EMPTY));
_az_PRECONDITION(is_az_span_empty(azure_iot_config->device_id)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->device_id, AZ_SPAN_EMPTY));
_az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_id_scope, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_id_scope, 1, false);
_az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_registration_id, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_registration_id, 1, false);
} }
@ -91,13 +91,13 @@ void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config
{ {
_az_PRECONDITION_VALID_SPAN(azure_iot_config->iot_hub_fqdn, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->iot_hub_fqdn, 1, false);
_az_PRECONDITION_VALID_SPAN(azure_iot_config->device_id, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->device_id, 1, false);
_az_PRECONDITION(is_az_span_empty(azure_iot_config->dps_id_scope)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->dps_id_scope, AZ_SPAN_EMPTY));
_az_PRECONDITION(is_az_span_empty(azure_iot_config->dps_registration_id)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->dps_registration_id, AZ_SPAN_EMPTY));
} }
// Either device key or device certificate and certificate key should be defined. // Either device key or device certificate and certificate key should be defined.
if (is_az_span_empty(azure_iot_config->device_key) && if (az_span_is_content_equal(azure_iot_config->device_key, AZ_SPAN_EMPTY) &&
(is_az_span_empty(azure_iot_config->device_certificate) || is_az_span_empty(azure_iot_config->device_certificate_private_key) )) (az_span_is_content_equal(azure_iot_config->device_certificate, AZ_SPAN_EMPTY) || az_span_is_content_equal(azure_iot_config->device_certificate_private_key, AZ_SPAN_EMPTY) ))
{ {
LogError("Please define either a device key or a device certificate and certificate private key. See iot_configs.h"); LogError("Please define either a device key or a device certificate and certificate private key. See iot_configs.h");
_az_PRECONDITION(false); _az_PRECONDITION(false);
@ -326,7 +326,7 @@ void azure_iot_do_work(azure_iot_t* azure_iot)
mqtt_message.topic = split_az_span(data_buffer, length + 1, &data_buffer); mqtt_message.topic = split_az_span(data_buffer, length + 1, &data_buffer);
if (is_az_span_empty(mqtt_message.topic) || is_az_span_empty(data_buffer)) if (az_span_is_content_equal(mqtt_message.topic, AZ_SPAN_EMPTY) || az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed reserving memory for DPS register payload."); LogError("Failed reserving memory for DPS register payload.");
@ -336,7 +336,7 @@ void azure_iot_do_work(azure_iot_t* azure_iot)
dps_register_custom_property = generate_dps_register_custom_property( dps_register_custom_property = generate_dps_register_custom_property(
azure_iot->config->model_id, data_buffer, &mqtt_message.payload); azure_iot->config->model_id, data_buffer, &mqtt_message.payload);
if (is_az_span_empty(dps_register_custom_property)) if (az_span_is_content_equal(dps_register_custom_property, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed generating DPS register custom property payload."); LogError("Failed generating DPS register custom property payload.");
@ -812,11 +812,11 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
{ {
result = RESULT_OK; result = RESULT_OK;
if (is_az_span_empty(azure_iot->dps_operation_id)) if (az_span_is_content_equal(azure_iot->dps_operation_id, AZ_SPAN_EMPTY))
{ {
azure_iot->dps_operation_id = slice_and_copy_az_span(azure_iot->data_buffer, register_response.operation_id, &azure_iot->data_buffer); azure_iot->dps_operation_id = slice_and_copy_az_span(azure_iot->data_buffer, register_response.operation_id, &azure_iot->data_buffer);
if (is_az_span_empty(azure_iot->dps_operation_id)) if (az_span_is_content_equal(azure_iot->dps_operation_id, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed reserving memory for DPS operation id."); LogError("Failed reserving memory for DPS operation id.");
@ -837,7 +837,7 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
azure_iot->config->iot_hub_fqdn = slice_and_copy_az_span(data_buffer, register_response.registration_state.assigned_hub_hostname, &data_buffer); azure_iot->config->iot_hub_fqdn = slice_and_copy_az_span(data_buffer, register_response.registration_state.assigned_hub_hostname, &data_buffer);
if (is_az_span_empty(azure_iot->config->iot_hub_fqdn)) if (az_span_is_content_equal(azure_iot->config->iot_hub_fqdn, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed saving IoT Hub fqdn from provisioning."); LogError("Failed saving IoT Hub fqdn from provisioning.");
@ -847,7 +847,7 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
{ {
azure_iot->config->device_id = slice_and_copy_az_span(data_buffer, register_response.registration_state.device_id, &data_buffer); azure_iot->config->device_id = slice_and_copy_az_span(data_buffer, register_response.registration_state.device_id, &data_buffer);
if (is_az_span_empty(azure_iot->config->device_id)) if (az_span_is_content_equal(azure_iot->config->device_id, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed saving device id from provisioning."); LogError("Failed saving device id from provisioning.");
@ -955,9 +955,9 @@ static int get_mqtt_client_config_for_dps(azure_iot_t* azure_iot, mqtt_client_co
data_buffer_span = azure_iot->data_buffer; data_buffer_span = azure_iot->data_buffer;
password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span); password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(password_span), RESULT_ERROR, "Failed reserving buffer for password_span."); EXIT_IF_TRUE(az_span_is_content_equal(password_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for password_span.");
if(!is_az_span_empty(azure_iot->config->device_key)) if(!az_span_is_content_equal(azure_iot->config->device_key, AZ_SPAN_EMPTY))
{ {
password_length = generate_sas_token_for_dps( password_length = generate_sas_token_for_dps(
&azure_iot->dps_client, &azure_iot->dps_client,
@ -971,7 +971,7 @@ static int get_mqtt_client_config_for_dps(azure_iot_t* azure_iot, mqtt_client_co
} }
client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span); client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(client_id_span), RESULT_ERROR, "Failed reserving buffer for client_id_span."); EXIT_IF_TRUE(az_span_is_content_equal(client_id_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for client_id_span.");
azrc = az_iot_provisioning_client_get_client_id( azrc = az_iot_provisioning_client_get_client_id(
&azure_iot->dps_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length); &azure_iot->dps_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length);
@ -989,7 +989,7 @@ static int get_mqtt_client_config_for_dps(azure_iot_t* azure_iot, mqtt_client_co
mqtt_client_config->client_id = client_id_span; mqtt_client_config->client_id = client_id_span;
mqtt_client_config->username = username_span; mqtt_client_config->username = username_span;
if(!is_az_span_empty(azure_iot->config->device_key)) if(!az_span_is_content_equal(azure_iot->config->device_key, AZ_SPAN_EMPTY))
{ {
mqtt_client_config->password = password_span; mqtt_client_config->password = password_span;
} }
@ -1035,7 +1035,7 @@ static int get_mqtt_client_config_for_iot_hub(azure_iot_t* azure_iot, mqtt_clien
data_buffer_span = azure_iot->data_buffer; data_buffer_span = azure_iot->data_buffer;
password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span); password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(password_span), RESULT_ERROR, "Failed reserving buffer for password_span."); EXIT_IF_TRUE(az_span_is_content_equal(password_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for password_span.");
password_length = generate_sas_token_for_iot_hub( password_length = generate_sas_token_for_iot_hub(
&azure_iot->iot_hub_client, &azure_iot->iot_hub_client,
@ -1048,7 +1048,7 @@ static int get_mqtt_client_config_for_iot_hub(azure_iot_t* azure_iot, mqtt_clien
EXIT_IF_TRUE(password_length == 0, RESULT_ERROR, "Failed creating mqtt password for IoT Hub connection."); EXIT_IF_TRUE(password_length == 0, RESULT_ERROR, "Failed creating mqtt password for IoT Hub connection.");
client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span); client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(client_id_span), RESULT_ERROR, "Failed reserving buffer for client_id_span."); EXIT_IF_TRUE(az_span_is_content_equal(client_id_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for client_id_span.");
azrc = az_iot_hub_client_get_client_id( azrc = az_iot_hub_client_get_client_id(
&azure_iot->iot_hub_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length); &azure_iot->iot_hub_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length);
@ -1113,7 +1113,7 @@ static int generate_sas_token_for_dps(
// Step 2.a. // Step 2.a.
plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(plain_sas_signature), 0, "Failed reserving buffer for plain sas token."); EXIT_IF_TRUE(az_span_is_content_equal(plain_sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for plain sas token.");
rc = az_iot_provisioning_client_sas_get_signature( rc = az_iot_provisioning_client_sas_get_signature(
provisioning_client, *expiration_time, plain_sas_signature, &plain_sas_signature); provisioning_client, *expiration_time, plain_sas_signature, &plain_sas_signature);
@ -1121,10 +1121,10 @@ static int generate_sas_token_for_dps(
// Step 2.b. // Step 2.b.
sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_signature), 0, "Failed reserving buffer for sas_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_signature.");
decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span); decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(decoded_sas_key), 0, "Failed reserving buffer for decoded_sas_key."); EXIT_IF_TRUE(az_span_is_content_equal(decoded_sas_key, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for decoded_sas_key.");
result = data_manipulation_functions.base64_decode( result = data_manipulation_functions.base64_decode(
az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length); az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length);
@ -1132,7 +1132,7 @@ static int generate_sas_token_for_dps(
// Step 2.c. // Step 2.c.
sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_hmac256_signed_signature), 0, "Failed reserving buffer for sas_hmac256_signed_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_hmac256_signed_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_hmac256_signed_signature.");
result = data_manipulation_functions.hmac_sha256_encrypt( result = data_manipulation_functions.hmac_sha256_encrypt(
az_span_ptr(decoded_sas_key), decoded_sas_key_length, az_span_ptr(decoded_sas_key), decoded_sas_key_length,
@ -1204,7 +1204,7 @@ static int generate_sas_token_for_iot_hub(
// Step 2.a. // Step 2.a.
plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(plain_sas_signature), 0, "Failed reserving buffer for plain sas token."); EXIT_IF_TRUE(az_span_is_content_equal(plain_sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for plain sas token.");
rc = az_iot_hub_client_sas_get_signature( rc = az_iot_hub_client_sas_get_signature(
iot_hub_client, *expiration_time, plain_sas_signature, &plain_sas_signature); iot_hub_client, *expiration_time, plain_sas_signature, &plain_sas_signature);
@ -1212,10 +1212,10 @@ static int generate_sas_token_for_iot_hub(
// Step 2.b. // Step 2.b.
sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_signature), 0, "Failed reserving buffer for sas_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_signature.");
decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span); decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(decoded_sas_key), 0, "Failed reserving buffer for decoded_sas_key."); EXIT_IF_TRUE(az_span_is_content_equal(decoded_sas_key, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for decoded_sas_key.");
result = data_manipulation_functions.base64_decode( result = data_manipulation_functions.base64_decode(
az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length); az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length);
@ -1223,7 +1223,7 @@ static int generate_sas_token_for_iot_hub(
// Step 2.c. // Step 2.c.
sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_hmac256_signed_signature), 0, "Failed reserving buffer for sas_hmac256_signed_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_hmac256_signed_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_hmac256_signed_signature.");
result = data_manipulation_functions.hmac_sha256_encrypt( result = data_manipulation_functions.hmac_sha256_encrypt(
az_span_ptr(decoded_sas_key), decoded_sas_key_length, az_span_ptr(decoded_sas_key), decoded_sas_key_length,
@ -1271,16 +1271,16 @@ static az_span generate_dps_register_custom_property(az_span model_id, az_span d
size_t length = lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN) + az_span_size(model_id) + lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_END); size_t length = lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN) + az_span_size(model_id) + lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_END);
custom_property = split_az_span(data_buffer, length, remainder); custom_property = split_az_span(data_buffer, length, remainder);
EXIT_IF_TRUE(is_az_span_empty(custom_property), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (not enough space)."); EXIT_IF_TRUE(az_span_is_content_equal(custom_property, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (not enough space).");
data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN)); data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN));
EXIT_IF_TRUE(is_az_span_empty(data_buffer), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (prefix)."); EXIT_IF_TRUE(az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (prefix).");
data_buffer = az_span_copy(data_buffer, model_id); data_buffer = az_span_copy(data_buffer, model_id);
EXIT_IF_TRUE(is_az_span_empty(data_buffer), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (model id)."); EXIT_IF_TRUE(az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (model id).");
data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_END)); data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_END));
EXIT_IF_TRUE(is_az_span_empty(data_buffer), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (suffix)."); EXIT_IF_TRUE(az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (suffix).");
return custom_property; return custom_property;
} }
@ -1290,7 +1290,7 @@ az_span split_az_span(az_span span, int32_t size, az_span* remainder)
{ {
az_span result = az_span_slice(span, 0, size); az_span result = az_span_slice(span, 0, size);
if (remainder != NULL && !is_az_span_empty(result)) if (remainder != NULL && !az_span_is_content_equal(result, AZ_SPAN_EMPTY))
{ {
*remainder = az_span_slice(span, size, az_span_size(span)); *remainder = az_span_slice(span, size, az_span_size(span));
} }
@ -1302,12 +1302,12 @@ az_span slice_and_copy_az_span(az_span destination, az_span source, az_span* rem
{ {
az_span result = split_az_span(destination, az_span_size(source), remainder); az_span result = split_az_span(destination, az_span_size(source), remainder);
if (is_az_span_empty(*remainder)) if (az_span_is_content_equal(*remainder, AZ_SPAN_EMPTY))
{ {
result = AZ_SPAN_EMPTY; result = AZ_SPAN_EMPTY;
} }
if (!is_az_span_empty(result)) if (!az_span_is_content_equal(result, AZ_SPAN_EMPTY))
{ {
(void)az_span_copy(result, source); (void)az_span_copy(result, source);
} }

9
examples/Azure_IoT_Central_ESP32/AzureIoT.h
Просмотреть файл

@ -788,15 +788,6 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
* These functions are used internally by the Azure IoT client code and its extensions. * These functions are used internally by the Azure IoT client code and its extensions.
*/ */
/**
* @brief Checks whether `span` is equal to AZ_SPAN_EMPTY.
*
* @param[in] span A span to be verified.
*
* @return boolean True if `span`'s pointer and size are equal to AZ_SPAN_EMPTY, or false otherwise.
*/
#define is_az_span_empty(span) az_span_is_content_equal(span, AZ_SPAN_EMPTY)
/** /**
* @brief Slices `span` at position `size`, returns the first slice and assigns the second slice to `remainder`. * @brief Slices `span` at position `size`, returns the first slice and assigns the second slice to `remainder`.
* *

68
examples/Azure_IoT_Central_ESP32_AzureIoTKit/AzureIoT.cpp
Просмотреть файл

@ -73,7 +73,7 @@ static int get_mqtt_client_config_for_iot_hub(azure_iot_t* azure_iot, mqtt_clien
static az_span generate_dps_register_custom_property(az_span model_id, az_span data_buffer, az_span* remainder); static az_span generate_dps_register_custom_property(az_span model_id, az_span data_buffer, az_span* remainder);
#define is_device_provisioned(azure_iot) \ #define is_device_provisioned(azure_iot) \
(!is_az_span_empty(azure_iot->config->iot_hub_fqdn) && !is_az_span_empty(azure_iot->config->device_id)) (!az_span_is_content_equal(azure_iot->config->iot_hub_fqdn, AZ_SPAN_EMPTY) && !az_span_is_content_equal(azure_iot->config->device_id, AZ_SPAN_EMPTY))
/* --- Public API --- */ /* --- Public API --- */
void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config) void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config)
@ -82,8 +82,8 @@ void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config
_az_PRECONDITION_NOT_NULL(azure_iot_config); _az_PRECONDITION_NOT_NULL(azure_iot_config);
if (azure_iot_config->use_device_provisioning) if (azure_iot_config->use_device_provisioning)
{ {
_az_PRECONDITION(is_az_span_empty(azure_iot_config->iot_hub_fqdn)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->iot_hub_fqdn, AZ_SPAN_EMPTY));
_az_PRECONDITION(is_az_span_empty(azure_iot_config->device_id)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->device_id, AZ_SPAN_EMPTY));
_az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_id_scope, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_id_scope, 1, false);
_az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_registration_id, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->dps_registration_id, 1, false);
} }
@ -91,13 +91,13 @@ void azure_iot_init(azure_iot_t* azure_iot, azure_iot_config_t* azure_iot_config
{ {
_az_PRECONDITION_VALID_SPAN(azure_iot_config->iot_hub_fqdn, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->iot_hub_fqdn, 1, false);
_az_PRECONDITION_VALID_SPAN(azure_iot_config->device_id, 1, false); _az_PRECONDITION_VALID_SPAN(azure_iot_config->device_id, 1, false);
_az_PRECONDITION(is_az_span_empty(azure_iot_config->dps_id_scope)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->dps_id_scope, AZ_SPAN_EMPTY));
_az_PRECONDITION(is_az_span_empty(azure_iot_config->dps_registration_id)); _az_PRECONDITION(az_span_is_content_equal(azure_iot_config->dps_registration_id, AZ_SPAN_EMPTY));
} }
// Either device key or device certificate and certificate key should be defined. // Either device key or device certificate and certificate key should be defined.
if (is_az_span_empty(azure_iot_config->device_key) && if (az_span_is_content_equal(azure_iot_config->device_key, AZ_SPAN_EMPTY) &&
(is_az_span_empty(azure_iot_config->device_certificate) || is_az_span_empty(azure_iot_config->device_certificate_private_key) )) (az_span_is_content_equal(azure_iot_config->device_certificate, AZ_SPAN_EMPTY) || az_span_is_content_equal(azure_iot_config->device_certificate_private_key, AZ_SPAN_EMPTY) ))
{ {
LogError("Please define either a device key or a device certificate and certificate private key. See iot_configs.h"); LogError("Please define either a device key or a device certificate and certificate private key. See iot_configs.h");
_az_PRECONDITION(false); _az_PRECONDITION(false);
@ -326,7 +326,7 @@ void azure_iot_do_work(azure_iot_t* azure_iot)
mqtt_message.topic = split_az_span(data_buffer, length + 1, &data_buffer); mqtt_message.topic = split_az_span(data_buffer, length + 1, &data_buffer);
if (is_az_span_empty(mqtt_message.topic) || is_az_span_empty(data_buffer)) if (az_span_is_content_equal(mqtt_message.topic, AZ_SPAN_EMPTY) || az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed reserving memory for DPS register payload."); LogError("Failed reserving memory for DPS register payload.");
@ -336,7 +336,7 @@ void azure_iot_do_work(azure_iot_t* azure_iot)
dps_register_custom_property = generate_dps_register_custom_property( dps_register_custom_property = generate_dps_register_custom_property(
azure_iot->config->model_id, data_buffer, &mqtt_message.payload); azure_iot->config->model_id, data_buffer, &mqtt_message.payload);
if (is_az_span_empty(dps_register_custom_property)) if (az_span_is_content_equal(dps_register_custom_property, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed generating DPS register custom property payload."); LogError("Failed generating DPS register custom property payload.");
@ -812,11 +812,11 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
{ {
result = RESULT_OK; result = RESULT_OK;
if (is_az_span_empty(azure_iot->dps_operation_id)) if (az_span_is_content_equal(azure_iot->dps_operation_id, AZ_SPAN_EMPTY))
{ {
azure_iot->dps_operation_id = slice_and_copy_az_span(azure_iot->data_buffer, register_response.operation_id, &azure_iot->data_buffer); azure_iot->dps_operation_id = slice_and_copy_az_span(azure_iot->data_buffer, register_response.operation_id, &azure_iot->data_buffer);
if (is_az_span_empty(azure_iot->dps_operation_id)) if (az_span_is_content_equal(azure_iot->dps_operation_id, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed reserving memory for DPS operation id."); LogError("Failed reserving memory for DPS operation id.");
@ -837,7 +837,7 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
azure_iot->config->iot_hub_fqdn = slice_and_copy_az_span(data_buffer, register_response.registration_state.assigned_hub_hostname, &data_buffer); azure_iot->config->iot_hub_fqdn = slice_and_copy_az_span(data_buffer, register_response.registration_state.assigned_hub_hostname, &data_buffer);
if (is_az_span_empty(azure_iot->config->iot_hub_fqdn)) if (az_span_is_content_equal(azure_iot->config->iot_hub_fqdn, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed saving IoT Hub fqdn from provisioning."); LogError("Failed saving IoT Hub fqdn from provisioning.");
@ -847,7 +847,7 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
{ {
azure_iot->config->device_id = slice_and_copy_az_span(data_buffer, register_response.registration_state.device_id, &data_buffer); azure_iot->config->device_id = slice_and_copy_az_span(data_buffer, register_response.registration_state.device_id, &data_buffer);
if (is_az_span_empty(azure_iot->config->device_id)) if (az_span_is_content_equal(azure_iot->config->device_id, AZ_SPAN_EMPTY))
{ {
azure_iot->state = azure_iot_state_error; azure_iot->state = azure_iot_state_error;
LogError("Failed saving device id from provisioning."); LogError("Failed saving device id from provisioning.");
@ -955,9 +955,9 @@ static int get_mqtt_client_config_for_dps(azure_iot_t* azure_iot, mqtt_client_co
data_buffer_span = azure_iot->data_buffer; data_buffer_span = azure_iot->data_buffer;
password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span); password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(password_span), RESULT_ERROR, "Failed reserving buffer for password_span."); EXIT_IF_TRUE(az_span_is_content_equal(password_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for password_span.");
if(!is_az_span_empty(azure_iot->config->device_key)) if(!az_span_is_content_equal(azure_iot->config->device_key, AZ_SPAN_EMPTY))
{ {
password_length = generate_sas_token_for_dps( password_length = generate_sas_token_for_dps(
&azure_iot->dps_client, &azure_iot->dps_client,
@ -971,7 +971,7 @@ static int get_mqtt_client_config_for_dps(azure_iot_t* azure_iot, mqtt_client_co
} }
client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span); client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(client_id_span), RESULT_ERROR, "Failed reserving buffer for client_id_span."); EXIT_IF_TRUE(az_span_is_content_equal(client_id_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for client_id_span.");
azrc = az_iot_provisioning_client_get_client_id( azrc = az_iot_provisioning_client_get_client_id(
&azure_iot->dps_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length); &azure_iot->dps_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length);
@ -989,7 +989,7 @@ static int get_mqtt_client_config_for_dps(azure_iot_t* azure_iot, mqtt_client_co
mqtt_client_config->client_id = client_id_span; mqtt_client_config->client_id = client_id_span;
mqtt_client_config->username = username_span; mqtt_client_config->username = username_span;
if(!is_az_span_empty(azure_iot->config->device_key)) if(!az_span_is_content_equal(azure_iot->config->device_key, AZ_SPAN_EMPTY))
{ {
mqtt_client_config->password = password_span; mqtt_client_config->password = password_span;
} }
@ -1035,7 +1035,7 @@ static int get_mqtt_client_config_for_iot_hub(azure_iot_t* azure_iot, mqtt_clien
data_buffer_span = azure_iot->data_buffer; data_buffer_span = azure_iot->data_buffer;
password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span); password_span = split_az_span(data_buffer_span, MQTT_PASSWORD_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(password_span), RESULT_ERROR, "Failed reserving buffer for password_span."); EXIT_IF_TRUE(az_span_is_content_equal(password_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for password_span.");
password_length = generate_sas_token_for_iot_hub( password_length = generate_sas_token_for_iot_hub(
&azure_iot->iot_hub_client, &azure_iot->iot_hub_client,
@ -1048,7 +1048,7 @@ static int get_mqtt_client_config_for_iot_hub(azure_iot_t* azure_iot, mqtt_clien
EXIT_IF_TRUE(password_length == 0, RESULT_ERROR, "Failed creating mqtt password for IoT Hub connection."); EXIT_IF_TRUE(password_length == 0, RESULT_ERROR, "Failed creating mqtt password for IoT Hub connection.");
client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span); client_id_span = split_az_span(data_buffer_span, MQTT_CLIENT_ID_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(client_id_span), RESULT_ERROR, "Failed reserving buffer for client_id_span."); EXIT_IF_TRUE(az_span_is_content_equal(client_id_span, AZ_SPAN_EMPTY), RESULT_ERROR, "Failed reserving buffer for client_id_span.");
azrc = az_iot_hub_client_get_client_id( azrc = az_iot_hub_client_get_client_id(
&azure_iot->iot_hub_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length); &azure_iot->iot_hub_client, (char*)az_span_ptr(client_id_span), az_span_size(client_id_span), &client_id_length);
@ -1113,7 +1113,7 @@ static int generate_sas_token_for_dps(
// Step 2.a. // Step 2.a.
plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(plain_sas_signature), 0, "Failed reserving buffer for plain sas token."); EXIT_IF_TRUE(az_span_is_content_equal(plain_sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for plain sas token.");
rc = az_iot_provisioning_client_sas_get_signature( rc = az_iot_provisioning_client_sas_get_signature(
provisioning_client, *expiration_time, plain_sas_signature, &plain_sas_signature); provisioning_client, *expiration_time, plain_sas_signature, &plain_sas_signature);
@ -1121,10 +1121,10 @@ static int generate_sas_token_for_dps(
// Step 2.b. // Step 2.b.
sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_signature), 0, "Failed reserving buffer for sas_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_signature.");
decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span); decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(decoded_sas_key), 0, "Failed reserving buffer for decoded_sas_key."); EXIT_IF_TRUE(az_span_is_content_equal(decoded_sas_key, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for decoded_sas_key.");
result = data_manipulation_functions.base64_decode( result = data_manipulation_functions.base64_decode(
az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length); az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length);
@ -1132,7 +1132,7 @@ static int generate_sas_token_for_dps(
// Step 2.c. // Step 2.c.
sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_hmac256_signed_signature), 0, "Failed reserving buffer for sas_hmac256_signed_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_hmac256_signed_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_hmac256_signed_signature.");
result = data_manipulation_functions.hmac_sha256_encrypt( result = data_manipulation_functions.hmac_sha256_encrypt(
az_span_ptr(decoded_sas_key), decoded_sas_key_length, az_span_ptr(decoded_sas_key), decoded_sas_key_length,
@ -1204,7 +1204,7 @@ static int generate_sas_token_for_iot_hub(
// Step 2.a. // Step 2.a.
plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); plain_sas_signature = split_az_span(data_buffer_span, PLAIN_SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(plain_sas_signature), 0, "Failed reserving buffer for plain sas token."); EXIT_IF_TRUE(az_span_is_content_equal(plain_sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for plain sas token.");
rc = az_iot_hub_client_sas_get_signature( rc = az_iot_hub_client_sas_get_signature(
iot_hub_client, *expiration_time, plain_sas_signature, &plain_sas_signature); iot_hub_client, *expiration_time, plain_sas_signature, &plain_sas_signature);
@ -1212,10 +1212,10 @@ static int generate_sas_token_for_iot_hub(
// Step 2.b. // Step 2.b.
sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_signature = split_az_span(data_buffer_span, SAS_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_signature), 0, "Failed reserving buffer for sas_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_signature.");
decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span); decoded_sas_key = split_az_span(data_buffer_span, DECODED_SAS_KEY_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(decoded_sas_key), 0, "Failed reserving buffer for decoded_sas_key."); EXIT_IF_TRUE(az_span_is_content_equal(decoded_sas_key, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for decoded_sas_key.");
result = data_manipulation_functions.base64_decode( result = data_manipulation_functions.base64_decode(
az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length); az_span_ptr(device_key), az_span_size(device_key), az_span_ptr(decoded_sas_key), az_span_size(decoded_sas_key), &decoded_sas_key_length);
@ -1223,7 +1223,7 @@ static int generate_sas_token_for_iot_hub(
// Step 2.c. // Step 2.c.
sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span); sas_hmac256_signed_signature = split_az_span(data_buffer_span, SAS_HMAC256_ENCRYPTED_SIGNATURE_BUFFER_SIZE, &data_buffer_span);
EXIT_IF_TRUE(is_az_span_empty(sas_hmac256_signed_signature), 0, "Failed reserving buffer for sas_hmac256_signed_signature."); EXIT_IF_TRUE(az_span_is_content_equal(sas_hmac256_signed_signature, AZ_SPAN_EMPTY), 0, "Failed reserving buffer for sas_hmac256_signed_signature.");
result = data_manipulation_functions.hmac_sha256_encrypt( result = data_manipulation_functions.hmac_sha256_encrypt(
az_span_ptr(decoded_sas_key), decoded_sas_key_length, az_span_ptr(decoded_sas_key), decoded_sas_key_length,
@ -1271,16 +1271,16 @@ static az_span generate_dps_register_custom_property(az_span model_id, az_span d
size_t length = lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN) + az_span_size(model_id) + lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_END); size_t length = lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN) + az_span_size(model_id) + lengthof(DPS_REGISTER_CUSTOM_PAYLOAD_END);
custom_property = split_az_span(data_buffer, length, remainder); custom_property = split_az_span(data_buffer, length, remainder);
EXIT_IF_TRUE(is_az_span_empty(custom_property), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (not enough space)."); EXIT_IF_TRUE(az_span_is_content_equal(custom_property, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (not enough space).");
data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN)); data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_BEGIN));
EXIT_IF_TRUE(is_az_span_empty(data_buffer), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (prefix)."); EXIT_IF_TRUE(az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (prefix).");
data_buffer = az_span_copy(data_buffer, model_id); data_buffer = az_span_copy(data_buffer, model_id);
EXIT_IF_TRUE(is_az_span_empty(data_buffer), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (model id)."); EXIT_IF_TRUE(az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (model id).");
data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_END)); data_buffer = az_span_copy(data_buffer, AZ_SPAN_FROM_STR(DPS_REGISTER_CUSTOM_PAYLOAD_END));
EXIT_IF_TRUE(is_az_span_empty(data_buffer), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (suffix)."); EXIT_IF_TRUE(az_span_is_content_equal(data_buffer, AZ_SPAN_EMPTY), AZ_SPAN_EMPTY, "Failed generating DPS register custom property (suffix).");
return custom_property; return custom_property;
} }
@ -1290,7 +1290,7 @@ az_span split_az_span(az_span span, int32_t size, az_span* remainder)
{ {
az_span result = az_span_slice(span, 0, size); az_span result = az_span_slice(span, 0, size);
if (remainder != NULL && !is_az_span_empty(result)) if (remainder != NULL && !az_span_is_content_equal(result, AZ_SPAN_EMPTY))
{ {
*remainder = az_span_slice(span, size, az_span_size(span)); *remainder = az_span_slice(span, size, az_span_size(span));
} }
@ -1302,12 +1302,12 @@ az_span slice_and_copy_az_span(az_span destination, az_span source, az_span* rem
{ {
az_span result = split_az_span(destination, az_span_size(source), remainder); az_span result = split_az_span(destination, az_span_size(source), remainder);
if (is_az_span_empty(*remainder)) if (az_span_is_content_equal(*remainder, AZ_SPAN_EMPTY))
{ {
result = AZ_SPAN_EMPTY; result = AZ_SPAN_EMPTY;
} }
if (!is_az_span_empty(result)) if (!az_span_is_content_equal(result, AZ_SPAN_EMPTY))
{ {
(void)az_span_copy(result, source); (void)az_span_copy(result, source);
} }

9
examples/Azure_IoT_Central_ESP32_AzureIoTKit/AzureIoT.h
Просмотреть файл

@ -788,15 +788,6 @@ int azure_iot_mqtt_client_message_received(azure_iot_t* azure_iot, mqtt_message_
* These functions are used internally by the Azure IoT client code and its extensions. * These functions are used internally by the Azure IoT client code and its extensions.
*/ */
/**
* @brief Checks whether `span` is equal to AZ_SPAN_EMPTY.
*
* @param[in] span A span to be verified.
*
* @return boolean True if `span`'s pointer and size are equal to AZ_SPAN_EMPTY, or false otherwise.
*/
#define is_az_span_empty(span) az_span_is_content_equal(span, AZ_SPAN_EMPTY)
/** /**
* @brief Slices `span` at position `size`, returns the first slice and assigns the second slice to `remainder`. * @brief Slices `span` at position `size`, returns the first slice and assigns the second slice to `remainder`.
* *

4
examples/Azure_IoT_Hub_ESP32/AzIoTSasToken.cpp
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@ -12,7 +12,7 @@
#define INDEFINITE_TIME ((time_t)-1) #define INDEFINITE_TIME ((time_t)-1)
#define is_az_span_empty(x) (az_span_size(x) == az_span_size(AZ_SPAN_EMPTY) && az_span_ptr(x) == az_span_ptr(AZ_SPAN_EMPTY)) #define az_span_is_content_equal(x, AZ_SPAN_EMPTY) (az_span_size(x) == az_span_size(AZ_SPAN_EMPTY) && az_span_ptr(x) == az_span_ptr(AZ_SPAN_EMPTY))
static uint32_t getSasTokenExpiration(const char* sasToken) static uint32_t getSasTokenExpiration(const char* sasToken)
{ {
@ -242,7 +242,7 @@ int AzIoTSasToken::Generate(unsigned int expiryTimeInMinutes)
expiryTimeInMinutes, expiryTimeInMinutes,
this->sasTokenBuffer); this->sasTokenBuffer);
if (is_az_span_empty(this->sasToken)) if (az_span_is_content_equal(this->sasToken, AZ_SPAN_EMPTY))
{ {
Logger.Error("Failed generating SAS token"); Logger.Error("Failed generating SAS token");
return 1; return 1;