Azure IoT / iothub_client

Microsoft Azure IoTHub client libraries

Dependents:   sht15_remote_monitoring RobotArmDemo iothub_client_sample_amqp f767zi_mqtt ... more

This library implements the Microsoft Azure IoTHub client library. The code is replicated from https://github.com/Azure/azure-iot-sdks

iothub_client.h@22:b8732db970af, 2016-01-15 (annotated)

Committer:
AzureIoTClient
Date:
Fri Jan 15 15:49:41 2016 -0800
Revision:
22:b8732db970af
Parent:
16:deba40344375
Child:
32:6e9d81a62085
v1.0.0-preview.4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AzureIoTClient 16:deba40344375 1 // Copyright (c) Microsoft. All rights reserved.
AzureIoTClient 16:deba40344375 2 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
AzureIoTClient 16:deba40344375 3
AzureIoTClient 16:deba40344375 4 /** @file iothub_client.h
AzureIoTClient 16:deba40344375 5 * @brief Extends the IoTHubCLient_LL module with additional features.
AzureIoTClient 16:deba40344375 6 *
AzureIoTClient 16:deba40344375 7 * @details IoTHubClient is a module that extends the IoTHubCLient_LL
AzureIoTClient 16:deba40344375 8 * module with 2 features:
AzureIoTClient 16:deba40344375 9 * - scheduling the work for the IoTHubCLient from a
AzureIoTClient 16:deba40344375 10 * thread, so that the user does not need to create their
AzureIoTClient 16:deba40344375 11 * own thread
AzureIoTClient 16:deba40344375 12 * - thread-safe APIs
AzureIoTClient 16:deba40344375 13 */
AzureIoTClient 16:deba40344375 14
AzureIoTClient 16:deba40344375 15 #ifndef IOTHUB_CLIENT_H
AzureIoTClient 22:b8732db970af 16 #define IOTHUB_CLIENT_H
AzureIoTClient 16:deba40344375 17
AzureIoTClient 16:deba40344375 18 #include "iothub_client_ll.h"
AzureIoTClient 16:deba40344375 19
AzureIoTClient 16:deba40344375 20 #ifdef __cplusplus
AzureIoTClient 16:deba40344375 21 extern "C"
AzureIoTClient 16:deba40344375 22 {
AzureIoTClient 16:deba40344375 23 #endif
AzureIoTClient 16:deba40344375 24
AzureIoTClient 16:deba40344375 25 typedef void* IOTHUB_CLIENT_HANDLE;
AzureIoTClient 16:deba40344375 26
AzureIoTClient 16:deba40344375 27 /**
AzureIoTClient 16:deba40344375 28 * @brief Creates a IoT Hub client for communication with an existing
AzureIoTClient 16:deba40344375 29 * IoT Hub using the specified connection string parameter.
AzureIoTClient 16:deba40344375 30 *
AzureIoTClient 16:deba40344375 31 * @param connectionString Pointer to a character string
AzureIoTClient 16:deba40344375 32 * @param protocol Function pointer for protocol implementation
AzureIoTClient 16:deba40344375 33 *
AzureIoTClient 16:deba40344375 34 * Sample connection string:
AzureIoTClient 16:deba40344375 35 * <blockquote>
AzureIoTClient 16:deba40344375 36 * <pre>HostName=[IoT Hub name goes here].[IoT Hub suffix goes here, e.g., private.azure-devices-int.net];DeviceId=[Device ID goes here];SharedAccessKey=[Device key goes here];</pre>
AzureIoTClient 16:deba40344375 37 * </blockquote>
AzureIoTClient 16:deba40344375 38 *
AzureIoTClient 16:deba40344375 39 * @return A non-NULL @c IOTHUB_CLIENT_HANDLE value that is used when
AzureIoTClient 16:deba40344375 40 * invoking other functions for IoT Hub client and @c NULL on failure.
AzureIoTClient 16:deba40344375 41 */
AzureIoTClient 16:deba40344375 42 extern IOTHUB_CLIENT_HANDLE IoTHubClient_CreateFromConnectionString(const char* connectionString, IOTHUB_CLIENT_TRANSPORT_PROVIDER protocol);
AzureIoTClient 16:deba40344375 43
AzureIoTClient 16:deba40344375 44 /**
AzureIoTClient 16:deba40344375 45 * @brief Creates a IoT Hub client for communication with an existing IoT
AzureIoTClient 16:deba40344375 46 * Hub using the specified parameters.
AzureIoTClient 16:deba40344375 47 *
AzureIoTClient 16:deba40344375 48 * @param config Pointer to an @c IOTHUB_CLIENT_CONFIG structure
AzureIoTClient 16:deba40344375 49 *
AzureIoTClient 16:deba40344375 50 * The API does not allow sharing of a connection across multiple
AzureIoTClient 16:deba40344375 51 * devices. This is a blocking call.
AzureIoTClient 16:deba40344375 52 *
AzureIoTClient 16:deba40344375 53 * @return A non-NULL @c IOTHUB_CLIENT_HANDLE value that is used when
AzureIoTClient 16:deba40344375 54 * invoking other functions for IoT Hub client and @c NULL on failure.
AzureIoTClient 16:deba40344375 55 */
AzureIoTClient 16:deba40344375 56 extern IOTHUB_CLIENT_HANDLE IoTHubClient_Create(const IOTHUB_CLIENT_CONFIG* config);
AzureIoTClient 16:deba40344375 57
AzureIoTClient 16:deba40344375 58 /**
AzureIoTClient 16:deba40344375 59 * @brief Disposes of resources allocated by the IoT Hub client. This is a
AzureIoTClient 16:deba40344375 60 * blocking call.
AzureIoTClient 16:deba40344375 61 *
AzureIoTClient 16:deba40344375 62 * @param iotHubClientHandle The handle created by a call to the create function.
AzureIoTClient 16:deba40344375 63 */
AzureIoTClient 16:deba40344375 64 extern void IoTHubClient_Destroy(IOTHUB_CLIENT_HANDLE iotHubClientHandle);
AzureIoTClient 16:deba40344375 65
AzureIoTClient 16:deba40344375 66 /**
AzureIoTClient 16:deba40344375 67 * @brief Asynchronous call to send the message specified by @p eventMessageHandle.
AzureIoTClient 16:deba40344375 68 *
AzureIoTClient 16:deba40344375 69 * @param iotHubClientHandle The handle created by a call to the create function.
AzureIoTClient 16:deba40344375 70 * @param eventMessageHandle The handle to an IoT Hub message.
AzureIoTClient 16:deba40344375 71 * @param eventConfirmationCallback The callback specified by the device for receiving
AzureIoTClient 16:deba40344375 72 * confirmation of the delivery of the IoT Hub message.
AzureIoTClient 16:deba40344375 73 * This callback can be expected to invoke the
AzureIoTClient 16:deba40344375 74 * ::IoTHubClient_SendEventAsync function for the
AzureIoTClient 16:deba40344375 75 * same message in an attempt to retry sending a failing
AzureIoTClient 16:deba40344375 76 * message. The user can specify a @c NULL value here to
AzureIoTClient 16:deba40344375 77 * indicate that no callback is required.
AzureIoTClient 16:deba40344375 78 * @param userContextCallback User specified context that will be provided to the
AzureIoTClient 16:deba40344375 79 * callback. This can be @c NULL.
AzureIoTClient 16:deba40344375 80 *
AzureIoTClient 16:deba40344375 81 * @b NOTE: The application behavior is undefined if the user calls
AzureIoTClient 16:deba40344375 82 * the ::IoTHubClient_Destroy function from within any callback.
AzureIoTClient 16:deba40344375 83 *
AzureIoTClient 16:deba40344375 84 * @return IOTHUB_CLIENT_OK upon success or an error code upon failure.
AzureIoTClient 16:deba40344375 85 */
AzureIoTClient 16:deba40344375 86 extern IOTHUB_CLIENT_RESULT IoTHubClient_SendEventAsync(IOTHUB_CLIENT_HANDLE iotHubClientHandle, IOTHUB_MESSAGE_HANDLE eventMessageHandle, IOTHUB_CLIENT_EVENT_CONFIRMATION_CALLBACK eventConfirmationCallback, void* userContextCallback);
AzureIoTClient 16:deba40344375 87
AzureIoTClient 16:deba40344375 88 /**
AzureIoTClient 16:deba40344375 89 * @brief This function returns the current sending status for IoTHubClient.
AzureIoTClient 16:deba40344375 90 *
AzureIoTClient 16:deba40344375 91 * @param iotHubClientHandle The handle created by a call to the create function.
AzureIoTClient 16:deba40344375 92 * @param iotHubClientStatus The sending state is populated at the address pointed
AzureIoTClient 16:deba40344375 93 * at by this parameter. The value will be set to
AzureIoTClient 16:deba40344375 94 * @c IOTHUBCLIENT_SENDSTATUS_IDLE if there is currently
AzureIoTClient 16:deba40344375 95 * no item to be sent and @c IOTHUBCLIENT_SENDSTATUS_BUSY
AzureIoTClient 16:deba40344375 96 * if there are.
AzureIoTClient 16:deba40344375 97 *
AzureIoTClient 16:deba40344375 98 * @return IOTHUB_CLIENT_OK upon success or an error code upon failure.
AzureIoTClient 16:deba40344375 99 */
AzureIoTClient 16:deba40344375 100 extern IOTHUB_CLIENT_RESULT IoTHubClient_GetSendStatus(IOTHUB_CLIENT_HANDLE iotHubClientHandle, IOTHUB_CLIENT_STATUS *iotHubClientStatus);
AzureIoTClient 16:deba40344375 101
AzureIoTClient 16:deba40344375 102 /**
AzureIoTClient 16:deba40344375 103 * @brief Sets up the message callback to be invoked when IoT Hub issues a
AzureIoTClient 16:deba40344375 104 * message to the device. This is a blocking call.
AzureIoTClient 16:deba40344375 105 *
AzureIoTClient 16:deba40344375 106 * @param iotHubClientHandle The handle created by a call to the create function.
AzureIoTClient 16:deba40344375 107 * @param messageCallback The callback specified by the device for receiving
AzureIoTClient 16:deba40344375 108 * messages from IoT Hub.
AzureIoTClient 16:deba40344375 109 * @param userContextCallback User specified context that will be provided to the
AzureIoTClient 16:deba40344375 110 * callback. This can be @c NULL.
AzureIoTClient 16:deba40344375 111 *
AzureIoTClient 16:deba40344375 112 * @b NOTE: The application behavior is undefined if the user calls
AzureIoTClient 16:deba40344375 113 * the ::IoTHubClient_Destroy function from within any callback.
AzureIoTClient 16:deba40344375 114 *
AzureIoTClient 16:deba40344375 115 * @return IOTHUB_CLIENT_OK upon success or an error code upon failure.
AzureIoTClient 16:deba40344375 116 */
AzureIoTClient 16:deba40344375 117 extern IOTHUB_CLIENT_RESULT IoTHubClient_SetMessageCallback(IOTHUB_CLIENT_HANDLE iotHubClientHandle, IOTHUB_CLIENT_MESSAGE_CALLBACK_ASYNC messageCallback, void* userContextCallback);
AzureIoTClient 16:deba40344375 118
AzureIoTClient 16:deba40344375 119 /**
AzureIoTClient 16:deba40344375 120 * @brief This function returns in the out parameter @p lastMessageReceiveTime
AzureIoTClient 16:deba40344375 121 * what was the value of the @c time function when the last message was
AzureIoTClient 16:deba40344375 122 * received at the client.
AzureIoTClient 16:deba40344375 123 *
AzureIoTClient 16:deba40344375 124 * @param iotHubClientHandle The handle created by a call to the create function.
AzureIoTClient 16:deba40344375 125 * @param lastMessageReceiveTime Out parameter containing the value of @c time function
AzureIoTClient 16:deba40344375 126 * when the last message was received.
AzureIoTClient 16:deba40344375 127 *
AzureIoTClient 16:deba40344375 128 * @return IOTHUB_CLIENT_OK upon success or an error code upon failure.
AzureIoTClient 16:deba40344375 129 */
AzureIoTClient 16:deba40344375 130 extern IOTHUB_CLIENT_RESULT IoTHubClient_GetLastMessageReceiveTime(IOTHUB_CLIENT_HANDLE iotHubClientHandle, time_t* lastMessageReceiveTime);
AzureIoTClient 16:deba40344375 131
AzureIoTClient 16:deba40344375 132 /**
AzureIoTClient 16:deba40344375 133 * @brief This API sets a runtime option identified by parameter @p optionName
AzureIoTClient 16:deba40344375 134 * to a value pointed to by @p value. @p optionName and the data type
AzureIoTClient 16:deba40344375 135 * @p value is pointing to are specific for every option.
AzureIoTClient 16:deba40344375 136 *
AzureIoTClient 16:deba40344375 137 * @param iotHubClientHandle The handle created by a call to the create function.
AzureIoTClient 16:deba40344375 138 * @param optionName Name of the option.
AzureIoTClient 16:deba40344375 139 * @param value The value.
AzureIoTClient 16:deba40344375 140 *
AzureIoTClient 16:deba40344375 141 * The options that can be set via this API are:
AzureIoTClient 16:deba40344375 142 * - @b timeout - the maximum time in milliseconds a communication is
AzureIoTClient 16:deba40344375 143 * allowed to use. @p value is a pointer to an @c unsigned @c int with
AzureIoTClient 16:deba40344375 144 * the timeout value in milliseconds. This is only supported for the HTTP
AzureIoTClient 16:deba40344375 145 * protocol as of now. When the HTTP protocol uses CURL, the meaning of
AzureIoTClient 16:deba40344375 146 * the parameter is <em>total request time</em>. When the HTTP protocol uses
AzureIoTClient 16:deba40344375 147 * winhttp, the meaning is the same as the @c dwSendTimeout and
AzureIoTClient 16:deba40344375 148 * @c dwReceiveTimeout parameters of the
AzureIoTClient 16:deba40344375 149 * <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa384116(v=vs.85).aspx">
AzureIoTClient 16:deba40344375 150 * WinHttpSetTimeouts</a> API.
AzureIoTClient 16:deba40344375 151 * - @b CURLOPT_LOW_SPEED_LIMIT - only available for HTTP protocol and only
AzureIoTClient 16:deba40344375 152 * when CURL is used. It has the same meaning as CURL's option with the same
AzureIoTClient 16:deba40344375 153 * name. @p value is pointer to a long.
AzureIoTClient 16:deba40344375 154 * - @b CURLOPT_LOW_SPEED_TIME - only available for HTTP protocol and only
AzureIoTClient 16:deba40344375 155 * when CURL is used. It has the same meaning as CURL's option with the same
AzureIoTClient 16:deba40344375 156 * name. @p value is pointer to a long.
AzureIoTClient 16:deba40344375 157 * - @b CURLOPT_FORBID_REUSE - only available for HTTP protocol and only
AzureIoTClient 16:deba40344375 158 * when CURL is used. It has the same meaning as CURL's option with the same
AzureIoTClient 16:deba40344375 159 * name. @p value is pointer to a long.
AzureIoTClient 16:deba40344375 160 * - @b CURLOPT_FRESH_CONNECT - only available for HTTP protocol and only
AzureIoTClient 16:deba40344375 161 * when CURL is used. It has the same meaning as CURL's option with the same
AzureIoTClient 16:deba40344375 162 * name. @p value is pointer to a long.
AzureIoTClient 16:deba40344375 163 * - @b CURLOPT_VERBOSE - only available for HTTP protocol and only
AzureIoTClient 16:deba40344375 164 * when CURL is used. It has the same meaning as CURL's option with the same
AzureIoTClient 16:deba40344375 165 * name. @p value is pointer to a long.
AzureIoTClient 16:deba40344375 166 *
AzureIoTClient 16:deba40344375 167 * @return IOTHUB_CLIENT_OK upon success or an error code upon failure.
AzureIoTClient 16:deba40344375 168 */
AzureIoTClient 16:deba40344375 169 extern IOTHUB_CLIENT_RESULT IoTHubClient_SetOption(IOTHUB_CLIENT_HANDLE iotHubClientHandle, const char* optionName, const void* value);
AzureIoTClient 16:deba40344375 170
AzureIoTClient 16:deba40344375 171 #ifdef __cplusplus
AzureIoTClient 16:deba40344375 172 }
AzureIoTClient 16:deba40344375 173 #endif
AzureIoTClient 16:deba40344375 174
AzureIoTClient 16:deba40344375 175 #endif /* IOTHUB_CLIENT_H */