Microsoft Azure IoTHub client AMQP transport
Dependents: sht15_remote_monitoring RobotArmDemo iothub_client_sample_amqp iothub_client_sample_amqp ... more
This library implements the AMQP transport for Microsoft Azure IoTHub client. The code is replicated from https://github.com/Azure/azure-iot-sdks
iothubtransport_amqp_common.c
- Committer:
- AzureIoTClient
- Date:
- 2017-05-08
- Revision:
- 34:51d158b409d2
- Parent:
- 32:babfd49032ff
- Child:
- 37:abd16824f63b
File content as of revision 34:51d158b409d2:
// Copyright (c) Microsoft. All rights reserved. // Licensed under the MIT license. See LICENSE file in the project root for full license information. #include <stdlib.h> #include <stdint.h> #include <stdbool.h> #include <time.h> #include <limits.h> #include "azure_c_shared_utility/optimize_size.h" #include "azure_c_shared_utility/agenttime.h" #include "azure_c_shared_utility/gballoc.h" #include "azure_c_shared_utility/crt_abstractions.h" #include "azure_c_shared_utility/singlylinkedlist.h" #include "azure_c_shared_utility/doublylinkedlist.h" #include "azure_c_shared_utility/xlogging.h" #include "azure_c_shared_utility/platform.h" #include "azure_c_shared_utility/strings.h" #include "azure_c_shared_utility/urlencode.h" #include "azure_c_shared_utility/tlsio.h" #include "azure_c_shared_utility/optionhandler.h" #include "azure_c_shared_utility/shared_util_options.h" #include "azure_c_shared_utility/macro_utils.h" #include "azure_uamqp_c/cbs.h" #include "azure_uamqp_c/session.h" #include "azure_uamqp_c/message.h" #include "azure_uamqp_c/messaging.h" #include "iothub_client_ll.h" #include "iothub_client_options.h" #include "iothub_client_private.h" #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ #include "iothubtransportamqp_methods.h" #endif #include "iothub_client_retry_control.h" #include "iothubtransport_amqp_common.h" #include "iothubtransport_amqp_connection.h" #include "iothubtransport_amqp_device.h" #include "iothub_client_version.h" #define RESULT_OK 0 #define INDEFINITE_TIME ((time_t)(-1)) #define DEFAULT_CBS_REQUEST_TIMEOUT_SECS 30 #define DEFAULT_DEVICE_STATE_CHANGE_TIMEOUT_SECS 60 #define DEFAULT_EVENT_SEND_TIMEOUT_SECS 300 #define DEFAULT_SAS_TOKEN_LIFETIME_SECS 3600 #define DEFAULT_SAS_TOKEN_REFRESH_TIME_SECS 1800 #define MAX_NUMBER_OF_DEVICE_FAILURES 5 #define DEFAULT_RETRY_POLICY IOTHUB_CLIENT_RETRY_EXPONENTIAL_BACKOFF_WITH_JITTER // DEFAULT_MAX_RETRY_TIME_IN_SECS = 0 means infinite retry. #define DEFAULT_MAX_RETRY_TIME_IN_SECS 0 // ---------- Data Definitions ---------- // typedef enum AMQP_TRANSPORT_AUTHENTICATION_MODE_TAG { AMQP_TRANSPORT_AUTHENTICATION_MODE_NOT_SET, AMQP_TRANSPORT_AUTHENTICATION_MODE_CBS, AMQP_TRANSPORT_AUTHENTICATION_MODE_X509 } AMQP_TRANSPORT_AUTHENTICATION_MODE; \ #define AMQP_TRANSPORT_STATE_STRINGS \ AMQP_TRANSPORT_STATE_NOT_CONNECTED, \ AMQP_TRANSPORT_STATE_CONNECTING, \ AMQP_TRANSPORT_STATE_CONNECTED, \ AMQP_TRANSPORT_STATE_RECONNECTION_REQUIRED, \ AMQP_TRANSPORT_STATE_READY_FOR_RECONNECTION, \ AMQP_TRANSPORT_STATE_RECONNECTING, \ AMQP_TRANSPORT_STATE_BEING_DESTROYED DEFINE_LOCAL_ENUM(AMQP_TRANSPORT_STATE, AMQP_TRANSPORT_STATE_STRINGS); typedef struct AMQP_TRANSPORT_INSTANCE_TAG { STRING_HANDLE iothub_host_fqdn; // FQDN of the IoT Hub. XIO_HANDLE tls_io; // TSL I/O transport. AMQP_GET_IO_TRANSPORT underlying_io_transport_provider; // Pointer to the function that creates the TLS I/O (internal use only). AMQP_CONNECTION_HANDLE amqp_connection; // Base amqp connection with service. AMQP_CONNECTION_STATE amqp_connection_state; // Current state of the amqp_connection. AMQP_TRANSPORT_AUTHENTICATION_MODE preferred_authentication_mode; // Used to avoid registered devices using different authentication modes. SINGLYLINKEDLIST_HANDLE registered_devices; // List of devices currently registered in this transport. bool is_trace_on; // Turns logging on and off. OPTIONHANDLER_HANDLE saved_tls_options; // Here are the options from the xio layer if any is saved. AMQP_TRANSPORT_STATE state; // Current state of the transport. RETRY_CONTROL_HANDLE connection_retry_control; // Controls when the re-connection attempt should occur. char* http_proxy_hostname; int http_proxy_port; char* http_proxy_username; char* http_proxy_password; size_t option_sas_token_lifetime_secs; // Device-specific option. size_t option_sas_token_refresh_time_secs; // Device-specific option. size_t option_cbs_request_timeout_secs; // Device-specific option. size_t option_send_event_timeout_secs; // Device-specific option. // Auth module used to generating handle authorization IOTHUB_AUTHORIZATION_HANDLE authorization_module; // with either SAS Token, x509 Certs, and Device SAS Token } AMQP_TRANSPORT_INSTANCE; typedef struct AMQP_TRANSPORT_DEVICE_INSTANCE_TAG { STRING_HANDLE device_id; // Identity of the device. DEVICE_HANDLE device_handle; // Logic unit that performs authentication, messaging, etc. IOTHUB_CLIENT_LL_HANDLE iothub_client_handle; // Saved reference to the IoTHub LL Client. AMQP_TRANSPORT_INSTANCE* transport_instance; // Saved reference to the transport the device is registered on. PDLIST_ENTRY waiting_to_send; // List of events waiting to be sent to the iot hub (i.e., haven't been processed by the transport yet). DEVICE_STATE device_state; // Current state of the device_handle instance. size_t number_of_previous_failures; // Number of times the device has failed in sequence; this value is reset to 0 if device succeeds to authenticate, send and/or recv messages. size_t number_of_send_event_complete_failures; // Number of times on_event_send_complete was called in row with an error. time_t time_of_last_state_change; // Time the device_handle last changed state; used to track timeouts of device_start_async and device_stop. unsigned int max_state_change_timeout_secs; // Maximum number of seconds allowed for device_handle to complete start and stop state changes. #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ // the methods portion IOTHUBTRANSPORT_AMQP_METHODS_HANDLE methods_handle; // Handle to instance of module that deals with device methods for AMQP. // is subscription for methods needed? bool subscribe_methods_needed; // Indicates if should subscribe for device methods. // is the transport subscribed for methods? bool subscribed_for_methods; // Indicates if device is subscribed for device methods. #endif } AMQP_TRANSPORT_DEVICE_INSTANCE; typedef struct MESSAGE_DISPOSITION_CONTEXT_TAG { AMQP_TRANSPORT_DEVICE_INSTANCE* device_state; char* link_name; delivery_number message_id; } MESSAGE_DISPOSITION_CONTEXT; // ---------- General Helpers ---------- // static void free_proxy_data(AMQP_TRANSPORT_INSTANCE* amqp_transport_instance) { if (amqp_transport_instance->http_proxy_hostname != NULL) { free(amqp_transport_instance->http_proxy_hostname); amqp_transport_instance->http_proxy_hostname = NULL; } if (amqp_transport_instance->http_proxy_username != NULL) { free(amqp_transport_instance->http_proxy_username); amqp_transport_instance->http_proxy_username = NULL; } if (amqp_transport_instance->http_proxy_password != NULL) { free(amqp_transport_instance->http_proxy_password); amqp_transport_instance->http_proxy_password = NULL; } } static STRING_HANDLE get_target_iothub_fqdn(const IOTHUBTRANSPORT_CONFIG* config) { STRING_HANDLE fqdn; if (config->upperConfig->protocolGatewayHostName == NULL) { if ((fqdn = STRING_construct_sprintf("%s.%s", config->upperConfig->iotHubName, config->upperConfig->iotHubSuffix)) == NULL) { LogError("Failed to copy iotHubName and iotHubSuffix (STRING_construct_sprintf failed)"); } } else if ((fqdn = STRING_construct(config->upperConfig->protocolGatewayHostName)) == NULL) { LogError("Failed to copy protocolGatewayHostName (STRING_construct failed)"); } return fqdn; } static void update_state(AMQP_TRANSPORT_INSTANCE* transport_instance, AMQP_TRANSPORT_STATE new_state) { AMQP_TRANSPORT_STATE previous_state = transport_instance->state; transport_instance->state = new_state; LogInfo("Transport state changed from %s to %s", ENUM_TO_STRING(AMQP_TRANSPORT_STATE, previous_state), ENUM_TO_STRING(AMQP_TRANSPORT_STATE, new_state)); } static void reset_retry_control(AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device) { retry_control_reset(registered_device->transport_instance->connection_retry_control); } // ---------- Register/Unregister Helpers ---------- // static void internal_destroy_amqp_device_instance(AMQP_TRANSPORT_DEVICE_INSTANCE *trdev_inst) { #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ if (trdev_inst->methods_handle != NULL) { iothubtransportamqp_methods_destroy(trdev_inst->methods_handle); } #endif if (trdev_inst->device_handle != NULL) { device_destroy(trdev_inst->device_handle); } if (trdev_inst->device_id != NULL) { STRING_delete(trdev_inst->device_id); } free(trdev_inst); } // @brief // Saves the new state, if it is different than the previous one. static void on_device_state_changed_callback(void* context, DEVICE_STATE previous_state, DEVICE_STATE new_state) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_061: [If `new_state` is the same as `previous_state`, on_device_state_changed_callback shall return] if (context != NULL && new_state != previous_state) { AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device = (AMQP_TRANSPORT_DEVICE_INSTANCE*)context; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_062: [If `new_state` shall be saved into the `registered_device` instance] registered_device->device_state = new_state; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_063: [If `registered_device->time_of_last_state_change` shall be set using get_time()] registered_device->time_of_last_state_change = get_time(NULL); if (new_state == DEVICE_STATE_STARTED) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_127: [If `new_state` is DEVICE_STATE_STARTED, retry_control_reset() shall be invoked passing `instance->connection_retry_control`] reset_retry_control(registered_device); // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_120: [If `new_state` is DEVICE_STATE_STARTED, IoTHubClient_LL_ConnectionStatusCallBack shall be invoked with IOTHUB_CLIENT_CONNECTION_AUTHENTICATED and IOTHUB_CLIENT_CONNECTION_OK] IoTHubClient_LL_ConnectionStatusCallBack(registered_device->iothub_client_handle, IOTHUB_CLIENT_CONNECTION_AUTHENTICATED, IOTHUB_CLIENT_CONNECTION_OK); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_121: [If `new_state` is DEVICE_STATE_STOPPED, IoTHubClient_LL_ConnectionStatusCallBack shall be invoked with IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED and IOTHUB_CLIENT_CONNECTION_OK] else if (new_state == DEVICE_STATE_STOPPED) { IoTHubClient_LL_ConnectionStatusCallBack(registered_device->iothub_client_handle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_OK); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_122: [If `new_state` is DEVICE_STATE_ERROR_AUTH, IoTHubClient_LL_ConnectionStatusCallBack shall be invoked with IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED and IOTHUB_CLIENT_CONNECTION_BAD_CREDENTIAL] else if (new_state == DEVICE_STATE_ERROR_AUTH) { IoTHubClient_LL_ConnectionStatusCallBack(registered_device->iothub_client_handle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_BAD_CREDENTIAL); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_123: [If `new_state` is DEVICE_STATE_ERROR_AUTH_TIMEOUT or DEVICE_STATE_ERROR_MSG, IoTHubClient_LL_ConnectionStatusCallBack shall be invoked with IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED and IOTHUB_CLIENT_CONNECTION_COMMUNICATION_ERROR] else if (new_state == DEVICE_STATE_ERROR_AUTH_TIMEOUT || new_state == DEVICE_STATE_ERROR_MSG) { IoTHubClient_LL_ConnectionStatusCallBack(registered_device->iothub_client_handle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_COMMUNICATION_ERROR); } } } // @brief Auxiliary function to be used to find a device in the registered_devices list. // @returns true if the device ids match, false otherwise. static bool find_device_by_id_callback(LIST_ITEM_HANDLE list_item, const void* match_context) { bool result; if (match_context == NULL) { result = false; } else { AMQP_TRANSPORT_DEVICE_INSTANCE* device_instance = (AMQP_TRANSPORT_DEVICE_INSTANCE*)singlylinkedlist_item_get_value(list_item); if (device_instance == NULL || device_instance->device_id == NULL || STRING_c_str(device_instance->device_id) != match_context) { result = false; } else { result = true; } } return result; } // @brief Verifies if a device is already registered within the transport that owns the list of registered devices. // @remarks Returns the correspoding LIST_ITEM_HANDLE in registered_devices, if found. // @returns true if the device is already in the list, false otherwise. static bool is_device_registered_ex(SINGLYLINKEDLIST_HANDLE registered_devices, const char* device_id, LIST_ITEM_HANDLE *list_item) { return ((*list_item = singlylinkedlist_find(registered_devices, find_device_by_id_callback, device_id)) != NULL ? 1 : 0); } // @brief Verifies if a device is already registered within the transport that owns the list of registered devices. // @returns true if the device is already in the list, false otherwise. static bool is_device_registered(AMQP_TRANSPORT_DEVICE_INSTANCE* amqp_device_instance) { LIST_ITEM_HANDLE list_item; const char* device_id = STRING_c_str(amqp_device_instance->device_id); return is_device_registered_ex(amqp_device_instance->transport_instance->registered_devices, device_id, &list_item); } // ---------- Callbacks ---------- // static MESSAGE_CALLBACK_INFO* MESSAGE_CALLBACK_INFO_Create(IOTHUB_MESSAGE_HANDLE message, DEVICE_MESSAGE_DISPOSITION_INFO* disposition_info, AMQP_TRANSPORT_DEVICE_INSTANCE* device_state) { MESSAGE_CALLBACK_INFO* result; if ((result = (MESSAGE_CALLBACK_INFO*)malloc(sizeof(MESSAGE_CALLBACK_INFO))) == NULL) { LogError("Failed creating MESSAGE_CALLBACK_INFO (malloc failed)"); } else { memset(result, 0, sizeof(MESSAGE_CALLBACK_INFO)); MESSAGE_DISPOSITION_CONTEXT* tc; if ((tc = (MESSAGE_DISPOSITION_CONTEXT*)malloc(sizeof(MESSAGE_DISPOSITION_CONTEXT))) == NULL) { LogError("Failed creating MESSAGE_DISPOSITION_CONTEXT (malloc failed)"); free(result); result = NULL; } else { memset(tc, 0, sizeof(MESSAGE_DISPOSITION_CONTEXT)); if (mallocAndStrcpy_s(&(tc->link_name), disposition_info->source) == 0) { tc->device_state = device_state; tc->message_id = disposition_info->message_id; result->messageHandle = message; result->transportContext = tc; } else { LogError("Failed creating MESSAGE_CALLBACK_INFO (mallocAndStrcyp_s failed)"); free(tc); free(result); result = NULL; } } } return result; } static void MESSAGE_CALLBACK_INFO_Destroy(MESSAGE_CALLBACK_INFO* message_callback_info) { if (message_callback_info->transportContext != NULL) { free(message_callback_info->transportContext->link_name); free(message_callback_info->transportContext); } free(message_callback_info); } static DEVICE_MESSAGE_DISPOSITION_RESULT get_device_disposition_result_from(IOTHUBMESSAGE_DISPOSITION_RESULT iothubclient_disposition_result) { DEVICE_MESSAGE_DISPOSITION_RESULT device_disposition_result; if (iothubclient_disposition_result == IOTHUBMESSAGE_ACCEPTED) { device_disposition_result = DEVICE_MESSAGE_DISPOSITION_RESULT_ACCEPTED; } else if (iothubclient_disposition_result == IOTHUBMESSAGE_ABANDONED) { device_disposition_result = DEVICE_MESSAGE_DISPOSITION_RESULT_RELEASED; } else if (iothubclient_disposition_result == IOTHUBMESSAGE_REJECTED) { device_disposition_result = DEVICE_MESSAGE_DISPOSITION_RESULT_REJECTED; } else { LogError("Failed getting corresponding DEVICE_MESSAGE_DISPOSITION_RESULT for IOTHUBMESSAGE_DISPOSITION_RESULT (%d is not supported)", iothubclient_disposition_result); device_disposition_result = DEVICE_MESSAGE_DISPOSITION_RESULT_RELEASED; } return device_disposition_result; } static DEVICE_MESSAGE_DISPOSITION_RESULT on_message_received(IOTHUB_MESSAGE_HANDLE message, DEVICE_MESSAGE_DISPOSITION_INFO* disposition_info, void* context) { AMQP_TRANSPORT_DEVICE_INSTANCE* amqp_device_instance = (AMQP_TRANSPORT_DEVICE_INSTANCE*)context; DEVICE_MESSAGE_DISPOSITION_RESULT device_disposition_result; MESSAGE_CALLBACK_INFO* message_data; if ((message_data = MESSAGE_CALLBACK_INFO_Create(message, disposition_info, amqp_device_instance)) == NULL) { LogError("Failed processing message received (failed to assemble callback info)"); device_disposition_result = DEVICE_MESSAGE_DISPOSITION_RESULT_RELEASED; } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_089: [IoTHubClient_LL_MessageCallback() shall be invoked passing the client and the incoming message handles as parameters] if (IoTHubClient_LL_MessageCallback(amqp_device_instance->iothub_client_handle, message_data) != true) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_090: [If IoTHubClient_LL_MessageCallback() fails, on_message_received_callback shall return DEVICE_MESSAGE_DISPOSITION_RESULT_RELEASED] LogError("Failed processing message received (IoTHubClient_LL_MessageCallback failed)"); IoTHubMessage_Destroy(message); MESSAGE_CALLBACK_INFO_Destroy(message_data); device_disposition_result = DEVICE_MESSAGE_DISPOSITION_RESULT_RELEASED; } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_091: [If IoTHubClient_LL_MessageCallback() succeeds, on_message_received_callback shall return DEVICE_MESSAGE_DISPOSITION_RESULT_NONE] device_disposition_result = DEVICE_MESSAGE_DISPOSITION_RESULT_NONE; } } return device_disposition_result; } #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ static void on_methods_error(void* context) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_030: [ `on_methods_error` shall do nothing. ]*/ (void)context; } static void on_methods_unsubscribed(void* context) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_METHODS_12_001: [ `on_methods_unsubscribed` calls iothubtransportamqp_methods_unsubscribe. ]*/ AMQP_TRANSPORT_DEVICE_INSTANCE* device_state = (AMQP_TRANSPORT_DEVICE_INSTANCE*)context; iothubtransportamqp_methods_unsubscribe(device_state->methods_handle); device_state->subscribed_for_methods = false; } static int on_method_request_received(void* context, const char* method_name, const unsigned char* request, size_t request_size, IOTHUBTRANSPORT_AMQP_METHOD_HANDLE method_handle) { int result; AMQP_TRANSPORT_DEVICE_INSTANCE* device_state = (AMQP_TRANSPORT_DEVICE_INSTANCE*)context; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_017: [ `on_methods_request_received` shall call the `IoTHubClient_LL_DeviceMethodComplete` passing the method name, request buffer and size and the newly created BUFFER handle. ]*/ /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_022: [ The status code shall be the return value of the call to `IoTHubClient_LL_DeviceMethodComplete`. ]*/ if (IoTHubClient_LL_DeviceMethodComplete(device_state->iothub_client_handle, method_name, request, request_size, (void*)method_handle) != 0) { LogError("Failure: IoTHubClient_LL_DeviceMethodComplete"); result = __FAILURE__; } else { result = 0; } return result; } static int subscribe_methods(AMQP_TRANSPORT_DEVICE_INSTANCE* deviceState) { int result; if (deviceState->subscribed_for_methods) { result = 0; } else { SESSION_HANDLE session_handle; if ((amqp_connection_get_session_handle(deviceState->transport_instance->amqp_connection, &session_handle)) != RESULT_OK) { LogError("Device '%s' failed subscribing for methods (failed getting session handle)", STRING_c_str(deviceState->device_id)); result = __FAILURE__; } /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_024: [ If the device authentication status is AUTHENTICATION_STATUS_OK and `IoTHubTransport_AMQP_Common_Subscribe_DeviceMethod` was called to register for methods, `IoTHubTransport_AMQP_Common_DoWork` shall call `iothubtransportamqp_methods_subscribe`. ]*/ /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_027: [ The current session handle shall be passed to `iothubtransportamqp_methods_subscribe`. ]*/ else if (iothubtransportamqp_methods_subscribe(deviceState->methods_handle, session_handle, on_methods_error, deviceState, on_method_request_received, deviceState, on_methods_unsubscribed, deviceState) != 0) { LogError("Cannot subscribe for methods"); result = __FAILURE__; } else { deviceState->subscribed_for_methods = true; result = 0; } } return result; } #endif // ---------- Underlying TLS I/O Helpers ---------- // // @brief // Retrieves the options of the current underlying TLS I/O instance and saves in the transport instance. // @remarks // This is used when the new underlying I/O transport (TLS I/O, or WebSockets, etc) needs to be recreated, // and the options previously set must persist. // // If no TLS I/O instance was created yet, results in failure. // @returns // 0 if succeeds, non-zero otherwise. static int save_underlying_io_transport_options(AMQP_TRANSPORT_INSTANCE* transport_instance) { int result; if (transport_instance->tls_io == NULL) { LogError("failed saving underlying I/O transport options (tls_io instance is NULL)"); result = __FAILURE__; } else { OPTIONHANDLER_HANDLE fresh_options; if ((fresh_options = xio_retrieveoptions(transport_instance->tls_io)) == NULL) { LogError("failed saving underlying I/O transport options (tls_io instance is NULL)"); result = __FAILURE__; } else { OPTIONHANDLER_HANDLE previous_options = transport_instance->saved_tls_options; transport_instance->saved_tls_options = fresh_options; if (previous_options != NULL) { OptionHandler_Destroy(previous_options); } result = RESULT_OK; } } return result; } static void destroy_underlying_io_transport_options(AMQP_TRANSPORT_INSTANCE* transport_instance) { if (transport_instance->saved_tls_options != NULL) { OptionHandler_Destroy(transport_instance->saved_tls_options); transport_instance->saved_tls_options = NULL; } } // @brief // Applies TLS I/O options if previously saved to a new TLS I/O instance. // @returns // 0 if succeeds, non-zero otherwise. static int restore_underlying_io_transport_options(AMQP_TRANSPORT_INSTANCE* transport_instance, XIO_HANDLE xio_handle) { int result; if (transport_instance->saved_tls_options == NULL) { result = RESULT_OK; } else { if (OptionHandler_FeedOptions(transport_instance->saved_tls_options, xio_handle) != OPTIONHANDLER_OK) { LogError("Failed feeding existing options to new TLS instance."); result = __FAILURE__; } else { result = RESULT_OK; } } return result; } // @brief Destroys the XIO_HANDLE obtained with underlying_io_transport_provider(), saving its options beforehand. static void destroy_underlying_io_transport(AMQP_TRANSPORT_INSTANCE* transport_instance) { if (transport_instance->tls_io != NULL) { xio_destroy(transport_instance->tls_io); transport_instance->tls_io = NULL; } } // @brief Invokes underlying_io_transport_provider() and retrieves a new XIO_HANDLE to use for I/O (TLS, or websockets, or w/e is supported). // @param xio_handle: if successfull, set with the new XIO_HANDLE acquired; not changed otherwise. // @returns 0 if successfull, non-zero otherwise. static int get_new_underlying_io_transport(AMQP_TRANSPORT_INSTANCE* transport_instance, XIO_HANDLE *xio_handle) { int result; AMQP_TRANSPORT_PROXY_OPTIONS amqp_transport_proxy_options; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_041: [ If the `proxy_data` option has been set, the proxy options shall be filled in the argument `amqp_transport_proxy_options` when calling the function `underlying_io_transport_provider()` to obtain the underlying IO handle. ]*/ amqp_transport_proxy_options.host_address = transport_instance->http_proxy_hostname; amqp_transport_proxy_options.port = transport_instance->http_proxy_port; amqp_transport_proxy_options.username = transport_instance->http_proxy_username; amqp_transport_proxy_options.password = transport_instance->http_proxy_password; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_042: [ If no `proxy_data` option has been set, NULL shall be passed as the argument `amqp_transport_proxy_options` when calling the function `underlying_io_transport_provider()`. ]*/ if ((*xio_handle = transport_instance->underlying_io_transport_provider(STRING_c_str(transport_instance->iothub_host_fqdn), amqp_transport_proxy_options.host_address == NULL ? NULL : &amqp_transport_proxy_options)) == NULL) { LogError("Failed to obtain a TLS I/O transport layer (underlying_io_transport_provider() failed)"); result = __FAILURE__; } else { if (restore_underlying_io_transport_options(transport_instance, *xio_handle) != RESULT_OK) { /*pessimistically hope TLS will fail, be recreated and options re-given*/ LogError("Failed to apply options previous saved to new underlying I/O transport instance."); } result = RESULT_OK; } return result; } // ---------- AMQP connection establishment/tear-down, connectry retry ---------- // static void on_amqp_connection_state_changed(const void* context, AMQP_CONNECTION_STATE previous_state, AMQP_CONNECTION_STATE new_state) { if (context != NULL && new_state != previous_state) { AMQP_TRANSPORT_INSTANCE* transport_instance = (AMQP_TRANSPORT_INSTANCE*)context; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_059: [`new_state` shall be saved in to the transport instance] transport_instance->amqp_connection_state = new_state; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_060: [If `new_state` is AMQP_CONNECTION_STATE_ERROR, the connection shall be flagged as faulty (so the connection retry logic can be triggered)] if (new_state == AMQP_CONNECTION_STATE_ERROR) { LogError("Transport received an ERROR from the amqp_connection (state changed %s -> %s); it will be flagged for connection retry.", ENUM_TO_STRING(AMQP_CONNECTION_STATE, previous_state), ENUM_TO_STRING(AMQP_CONNECTION_STATE, new_state)); update_state(transport_instance, AMQP_TRANSPORT_STATE_RECONNECTION_REQUIRED); } else if (new_state == AMQP_CONNECTION_STATE_OPENED) { update_state(transport_instance, AMQP_TRANSPORT_STATE_CONNECTED); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_115: [If the AMQP connection is closed by the service side, the connection retry logic shall be triggered] else if (new_state == AMQP_CONNECTION_STATE_CLOSED && previous_state == AMQP_CONNECTION_STATE_OPENED && transport_instance->state != AMQP_TRANSPORT_STATE_BEING_DESTROYED) { LogError("amqp_connection was closed unexpectedly; connection retry will be triggered."); update_state(transport_instance, AMQP_TRANSPORT_STATE_RECONNECTION_REQUIRED); } } } static int establish_amqp_connection(AMQP_TRANSPORT_INSTANCE* transport_instance) { int result; if (transport_instance->preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_NOT_SET) { LogError("Failed establishing connection (transport doesn't have a preferred authentication mode set; unexpected!)."); result = __FAILURE__; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_023: [If `instance->tls_io` is NULL, it shall be set invoking instance->underlying_io_transport_provider()] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_025: [When `instance->tls_io` is created, it shall be set with `instance->saved_tls_options` using OptionHandler_FeedOptions()] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_111: [If OptionHandler_FeedOptions() fails, it shall be ignored] else if (transport_instance->tls_io == NULL && get_new_underlying_io_transport(transport_instance, &transport_instance->tls_io) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_024: [If instance->underlying_io_transport_provider() fails, IoTHubTransport_AMQP_Common_DoWork shall fail and return] LogError("Failed establishing connection (failed to obtain a TLS I/O transport layer)."); result = __FAILURE__; } else { AMQP_CONNECTION_CONFIG amqp_connection_config; amqp_connection_config.iothub_host_fqdn = STRING_c_str(transport_instance->iothub_host_fqdn); amqp_connection_config.underlying_io_transport = transport_instance->tls_io; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_029: [`instance->is_trace_on` shall be set into `AMQP_CONNECTION_CONFIG->is_trace_on`] amqp_connection_config.is_trace_on = transport_instance->is_trace_on; amqp_connection_config.on_state_changed_callback = on_amqp_connection_state_changed; amqp_connection_config.on_state_changed_context = transport_instance; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_027: [If `transport->preferred_authentication_method` is CBS, AMQP_CONNECTION_CONFIG shall be set with `create_sasl_io` = true and `create_cbs_connection` = true] if (transport_instance->preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_CBS) { amqp_connection_config.create_sasl_io = true; amqp_connection_config.create_cbs_connection = true; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_028: [If `transport->preferred_credential_method` is X509, AMQP_CONNECTION_CONFIG shall be set with `create_sasl_io` = false and `create_cbs_connection` = false] else if (transport_instance->preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_X509) { amqp_connection_config.create_sasl_io = false; amqp_connection_config.create_cbs_connection = false; } // If new AMQP_TRANSPORT_AUTHENTICATION_MODE values are added, they need to be covered here. transport_instance->amqp_connection_state = AMQP_CONNECTION_STATE_CLOSED; if (transport_instance->state == AMQP_TRANSPORT_STATE_READY_FOR_RECONNECTION) { update_state(transport_instance, AMQP_TRANSPORT_STATE_RECONNECTING); } else { update_state(transport_instance, AMQP_TRANSPORT_STATE_CONNECTING); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_026: [If `transport->connection` is NULL, it shall be created using amqp_connection_create()] if ((transport_instance->amqp_connection = amqp_connection_create(&amqp_connection_config)) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_030: [If amqp_connection_create() fails, IoTHubTransport_AMQP_Common_DoWork shall fail and return] LogError("Failed establishing connection (failed to create the amqp_connection instance)."); result = __FAILURE__; } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_110: [If amqp_connection_create() succeeds, IoTHubTransport_AMQP_Common_DoWork shall proceed to invoke amqp_connection_do_work] result = RESULT_OK; } } return result; } static void prepare_device_for_connection_retry(AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device) { #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_032: [ Each `instance->registered_devices` shall unsubscribe from receiving C2D method requests by calling `iothubtransportamqp_methods_unsubscribe`] iothubtransportamqp_methods_unsubscribe(registered_device->methods_handle); registered_device->subscribed_for_methods = 0; #endif // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_031: [device_stop() shall be invoked on all `instance->registered_devices` that are not already stopped] if (registered_device->device_state != DEVICE_STATE_STOPPED) { if (device_stop(registered_device->device_handle) != RESULT_OK) { LogError("Failed preparing device '%s' for connection retry (device_stop failed)", STRING_c_str(registered_device->device_id)); } } registered_device->number_of_previous_failures = 0; registered_device->number_of_send_event_complete_failures = 0; } static void prepare_for_connection_retry(AMQP_TRANSPORT_INSTANCE* transport_instance) { LogInfo("Preparing transport for re-connection"); // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_034: [`instance->tls_io` options shall be saved on `instance->saved_tls_options` using xio_retrieveoptions()] if (save_underlying_io_transport_options(transport_instance) != RESULT_OK) { LogError("Failed saving TLS I/O options while preparing for connection retry; failure will be ignored"); } LIST_ITEM_HANDLE list_item = singlylinkedlist_get_head_item(transport_instance->registered_devices); while (list_item != NULL) { AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device = (AMQP_TRANSPORT_DEVICE_INSTANCE*)singlylinkedlist_item_get_value(list_item); if (registered_device == NULL) { LogError("Failed preparing device for connection retry (singlylinkedlist_item_get_value failed)"); } else { prepare_device_for_connection_retry(registered_device); } list_item = singlylinkedlist_get_next_item(list_item); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_033: [`instance->connection` shall be destroyed using amqp_connection_destroy()] amqp_connection_destroy(transport_instance->amqp_connection); transport_instance->amqp_connection = NULL; transport_instance->amqp_connection_state = AMQP_CONNECTION_STATE_CLOSED; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_035: [`instance->tls_io` shall be destroyed using xio_destroy()] destroy_underlying_io_transport(transport_instance); update_state(transport_instance, AMQP_TRANSPORT_STATE_READY_FOR_RECONNECTION); } // @brief Verifies if the crendentials used by the device match the requirements and authentication mode currently supported by the transport. // @returns true if credentials are good, false otherwise. static bool is_device_credential_acceptable(const IOTHUB_DEVICE_CONFIG* device_config, AMQP_TRANSPORT_AUTHENTICATION_MODE preferred_authentication_mode) { bool result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_03_003: [IoTHubTransport_AMQP_Common_Register shall return NULL if both deviceKey and deviceSasToken are not NULL.] if ((device_config->deviceSasToken != NULL) && (device_config->deviceKey != NULL)) { LogError("Credential of device '%s' is not acceptable (must provide EITHER deviceSasToken OR deviceKey)", device_config->deviceId); result = false; } else if (preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_NOT_SET) { result = true; } else if (preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_X509 && (device_config->deviceKey != NULL || device_config->deviceSasToken != NULL)) { LogError("Credential of device '%s' is not acceptable (transport is using X509 certificate authentication, but device config contains deviceKey or sasToken)", device_config->deviceId); result = false; } else if (preferred_authentication_mode != AMQP_TRANSPORT_AUTHENTICATION_MODE_X509 && (device_config->deviceKey == NULL && device_config->deviceSasToken == NULL)) { LogError("Credential of device '%s' is not acceptable (transport is using CBS authentication, but device config does not contain deviceKey nor sasToken)", device_config->deviceId); result = false; } else { result = true; } return result; } //---------- DoWork Helpers ----------// static IOTHUB_MESSAGE_LIST* get_next_event_to_send(AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device) { IOTHUB_MESSAGE_LIST* message; if (!DList_IsListEmpty(registered_device->waiting_to_send)) { PDLIST_ENTRY list_entry = registered_device->waiting_to_send->Flink; message = containingRecord(list_entry, IOTHUB_MESSAGE_LIST, entry); (void)DList_RemoveEntryList(list_entry); } else { message = NULL; } return message; } // @brief "Parses" the D2C_EVENT_SEND_RESULT (from iothubtransport_amqp_device module) into a IOTHUB_CLIENT_CONFIRMATION_RESULT. static IOTHUB_CLIENT_CONFIRMATION_RESULT get_iothub_client_confirmation_result_from(D2C_EVENT_SEND_RESULT result) { IOTHUB_CLIENT_CONFIRMATION_RESULT iothub_send_result; switch (result) { case D2C_EVENT_SEND_COMPLETE_RESULT_OK: iothub_send_result = IOTHUB_CLIENT_CONFIRMATION_OK; break; case D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_CANNOT_PARSE: case D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING: iothub_send_result = IOTHUB_CLIENT_CONFIRMATION_ERROR; break; case D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_TIMEOUT: iothub_send_result = IOTHUB_CLIENT_CONFIRMATION_MESSAGE_TIMEOUT; break; case D2C_EVENT_SEND_COMPLETE_RESULT_DEVICE_DESTROYED: iothub_send_result = IOTHUB_CLIENT_CONFIRMATION_BECAUSE_DESTROY; break; case D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_UNKNOWN: default: iothub_send_result = IOTHUB_CLIENT_CONFIRMATION_ERROR; break; } return iothub_send_result; } // @brief // Callback function for device_send_event_async. static void on_event_send_complete(IOTHUB_MESSAGE_LIST* message, D2C_EVENT_SEND_RESULT result, void* context) { AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device = (AMQP_TRANSPORT_DEVICE_INSTANCE*)context; if (result != D2C_EVENT_SEND_COMPLETE_RESULT_OK && result != D2C_EVENT_SEND_COMPLETE_RESULT_DEVICE_DESTROYED) { registered_device->number_of_send_event_complete_failures++; } else { registered_device->number_of_send_event_complete_failures = 0; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_056: [If `message->callback` is not NULL, it shall invoked with the `iothub_send_result`] if (message->callback != NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_050: [If result is D2C_EVENT_SEND_COMPLETE_RESULT_OK, `iothub_send_result` shall be set using IOTHUB_CLIENT_CONFIRMATION_OK] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_051: [If result is D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_CANNOT_PARSE, `iothub_send_result` shall be set using IOTHUB_CLIENT_CONFIRMATION_ERROR] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_052: [If result is D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING, `iothub_send_result` shall be set using IOTHUB_CLIENT_CONFIRMATION_ERROR] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_053: [If result is D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_TIMEOUT, `iothub_send_result` shall be set using IOTHUB_CLIENT_CONFIRMATION_MESSAGE_TIMEOUT] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_054: [If result is D2C_EVENT_SEND_COMPLETE_RESULT_DEVICE_DESTROYED, `iothub_send_result` shall be set using IOTHUB_CLIENT_CONFIRMATION_BECAUSE_DESTROY] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_055: [If result is D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_UNKNOWN, `iothub_send_result` shall be set using IOTHUB_CLIENT_CONFIRMATION_ERROR] IOTHUB_CLIENT_CONFIRMATION_RESULT iothub_send_result = get_iothub_client_confirmation_result_from(result); message->callback(iothub_send_result, message->context); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_057: [`message->messageHandle` shall be destroyed using IoTHubMessage_Destroy] IoTHubMessage_Destroy(message->messageHandle); // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_058: [`message` shall be destroyed using free] free(message); } // @brief // Gets events from wait to send list and sends to service in the order they were added. // @returns // 0 if all events could be sent to the next layer successfully, non-zero otherwise. static int send_pending_events(AMQP_TRANSPORT_DEVICE_INSTANCE* device_state) { int result; IOTHUB_MESSAGE_LIST* message; result = RESULT_OK; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_047: [If the registered device is started, each event on `registered_device->wait_to_send_list` shall be removed from the list and sent using device_send_event_async()] while ((message = get_next_event_to_send(device_state)) != NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_048: [device_send_event_async() shall be invoked passing `on_event_send_complete`] if (device_send_event_async(device_state->device_handle, message, on_event_send_complete, device_state) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_049: [If device_send_event_async() fails, `on_event_send_complete` shall be invoked passing EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING and return] LogError("Device '%s' failed to send message (device_send_event_async failed)", STRING_c_str(device_state->device_id)); result = __FAILURE__; on_event_send_complete(message, D2C_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING, device_state); break; } } return result; } // @brief // Auxiliary function for the public DoWork API, performing DoWork activities (authenticate, messaging) for a specific device. // @requires // The transport to have a valid instance of AMQP_CONNECTION (from which to obtain SESSION_HANDLE and CBS_HANDLE) // @returns // 0 if no errors occur, non-zero otherwise. static int IoTHubTransport_AMQP_Common_Device_DoWork(AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device) { int result; if (registered_device->device_state != DEVICE_STATE_STARTED) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_036: [If the device state is DEVICE_STATE_STOPPED, it shall be started] if (registered_device->device_state == DEVICE_STATE_STOPPED) { SESSION_HANDLE session_handle; CBS_HANDLE cbs_handle = NULL; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_039: [amqp_connection_get_session_handle() shall be invoked on `instance->connection`] if (amqp_connection_get_session_handle(registered_device->transport_instance->amqp_connection, &session_handle) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_040: [If amqp_connection_get_session_handle() fails, IoTHubTransport_AMQP_Common_DoWork shall fail and return] LogError("Failed performing DoWork for device '%s' (failed to get the amqp_connection session_handle)", STRING_c_str(registered_device->device_id)); result = __FAILURE__; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_037: [If transport is using CBS authentication, amqp_connection_get_cbs_handle() shall be invoked on `instance->connection`] else if (registered_device->transport_instance->preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_CBS && amqp_connection_get_cbs_handle(registered_device->transport_instance->amqp_connection, &cbs_handle) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_038: [If amqp_connection_get_cbs_handle() fails, IoTHubTransport_AMQP_Common_DoWork shall fail and return] LogError("Failed performing DoWork for device '%s' (failed to get the amqp_connection cbs_handle)", STRING_c_str(registered_device->device_id)); result = __FAILURE__; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_041: [The device handle shall be started using device_start_async()] else if (device_start_async(registered_device->device_handle, session_handle, cbs_handle) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_042: [If device_start_async() fails, IoTHubTransport_AMQP_Common_DoWork shall fail and skip to the next registered device] LogError("Failed performing DoWork for device '%s' (failed to start device)", STRING_c_str(registered_device->device_id)); result = __FAILURE__; } else { result = RESULT_OK; } } else if (registered_device->device_state == DEVICE_STATE_STARTING || registered_device->device_state == DEVICE_STATE_STOPPING) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_043: [If the device handle is in state DEVICE_STATE_STARTING or DEVICE_STATE_STOPPING, it shall be checked for state change timeout] bool is_timed_out; if (is_timeout_reached(registered_device->time_of_last_state_change, registered_device->max_state_change_timeout_secs, &is_timed_out) != RESULT_OK) { LogError("Failed performing DoWork for device '%s' (failed tracking timeout of device %d state)", STRING_c_str(registered_device->device_id), registered_device->device_state); registered_device->device_state = DEVICE_STATE_ERROR_AUTH; // if time could not be calculated, the worst must be assumed. result = __FAILURE__; } else if (is_timed_out) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_044: [If the device times out in state DEVICE_STATE_STARTING or DEVICE_STATE_STOPPING, the registered device shall be marked with failure] LogError("Failed performing DoWork for device '%s' (device failed to start or stop within expected timeout)", STRING_c_str(registered_device->device_id)); registered_device->device_state = DEVICE_STATE_ERROR_AUTH; // this will cause device to be stopped bellow on the next call to this function. result = __FAILURE__; } else { result = RESULT_OK; } } else // i.e., DEVICE_STATE_ERROR_AUTH || DEVICE_STATE_ERROR_AUTH_TIMEOUT || DEVICE_STATE_ERROR_MSG { LogError("Failed performing DoWork for device '%s' (device reported state %d; number of previous failures: %d)", STRING_c_str(registered_device->device_id), registered_device->device_state, registered_device->number_of_previous_failures); registered_device->number_of_previous_failures++; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_046: [If the device has failed for MAX_NUMBER_OF_DEVICE_FAILURES in a row, it shall trigger a connection retry on the transport] if (registered_device->number_of_previous_failures >= MAX_NUMBER_OF_DEVICE_FAILURES) { result = __FAILURE__; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_045: [If the registered device has a failure, it shall be stopped using device_stop()] else if (device_stop(registered_device->device_handle) != RESULT_OK) { LogError("Failed to stop reset device '%s' (device_stop failed)", STRING_c_str(registered_device->device_id)); result = __FAILURE__; } else { result = RESULT_OK; } } } #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_031: [ Once the device is authenticated, `iothubtransportamqp_methods_subscribe` shall be invoked (subsequent DoWork calls shall not call it if already subscribed). ] else if (registered_device->subscribe_methods_needed && !registered_device->subscribed_for_methods && subscribe_methods(registered_device) != RESULT_OK) { LogError("Failed performing DoWork for device '%s' (failed registering for device methods)", STRING_c_str(registered_device->device_id)); registered_device->number_of_previous_failures++; result = __FAILURE__; } #endif else { if (send_pending_events(registered_device) != RESULT_OK) { LogError("Failed performing DoWork for device '%s' (failed sending pending events)", STRING_c_str(registered_device->device_id)); registered_device->number_of_previous_failures++; result = __FAILURE__; } else { registered_device->number_of_previous_failures = 0; result = RESULT_OK; } } // No harm in invoking this as API will simply exit if the state is not "started". device_do_work(registered_device->device_handle); return result; } //---------- SetOption-ish Helpers ----------// // @brief // Gets all the device-specific options and replicates them into this new registered device. // @returns // 0 if the function succeeds, non-zero otherwise. static int replicate_device_options_to(AMQP_TRANSPORT_DEVICE_INSTANCE* dev_instance, DEVICE_AUTH_MODE auth_mode) { int result; if (device_set_option( dev_instance->device_handle, DEVICE_OPTION_EVENT_SEND_TIMEOUT_SECS, &dev_instance->transport_instance->option_send_event_timeout_secs) != RESULT_OK) { LogError("Failed to apply option DEVICE_OPTION_EVENT_SEND_TIMEOUT_SECS to device '%s' (device_set_option failed)", STRING_c_str(dev_instance->device_id)); result = __FAILURE__; } else if (auth_mode == DEVICE_AUTH_MODE_CBS) { if (device_set_option( dev_instance->device_handle, DEVICE_OPTION_CBS_REQUEST_TIMEOUT_SECS, &dev_instance->transport_instance->option_cbs_request_timeout_secs) != RESULT_OK) { LogError("Failed to apply option DEVICE_OPTION_CBS_REQUEST_TIMEOUT_SECS to device '%s' (device_set_option failed)", STRING_c_str(dev_instance->device_id)); result = __FAILURE__; } else if (device_set_option( dev_instance->device_handle, DEVICE_OPTION_SAS_TOKEN_LIFETIME_SECS, &dev_instance->transport_instance->option_sas_token_lifetime_secs) != RESULT_OK) { LogError("Failed to apply option DEVICE_OPTION_SAS_TOKEN_LIFETIME_SECS to device '%s' (device_set_option failed)", STRING_c_str(dev_instance->device_id)); result = __FAILURE__; } else if (device_set_option( dev_instance->device_handle, DEVICE_OPTION_SAS_TOKEN_REFRESH_TIME_SECS, &dev_instance->transport_instance->option_sas_token_refresh_time_secs) != RESULT_OK) { LogError("Failed to apply option DEVICE_OPTION_SAS_TOKEN_REFRESH_TIME_SECS to device '%s' (device_set_option failed)", STRING_c_str(dev_instance->device_id)); result = __FAILURE__; } else { result = RESULT_OK; } } else { result = RESULT_OK; } return result; } // @brief // Translates from the option names supported by iothubtransport_amqp_common to the ones supported by iothubtransport_amqp_device. static const char* get_device_option_name_from(const char* iothubclient_option_name) { const char* device_option_name; if (strcmp(OPTION_SAS_TOKEN_LIFETIME, iothubclient_option_name) == 0) { device_option_name = DEVICE_OPTION_SAS_TOKEN_LIFETIME_SECS; } else if (strcmp(OPTION_SAS_TOKEN_REFRESH_TIME, iothubclient_option_name) == 0) { device_option_name = DEVICE_OPTION_SAS_TOKEN_REFRESH_TIME_SECS; } else if (strcmp(OPTION_CBS_REQUEST_TIMEOUT, iothubclient_option_name) == 0) { device_option_name = DEVICE_OPTION_CBS_REQUEST_TIMEOUT_SECS; } else if (strcmp(OPTION_EVENT_SEND_TIMEOUT_SECS, iothubclient_option_name) == 0) { device_option_name = DEVICE_OPTION_EVENT_SEND_TIMEOUT_SECS; } else { device_option_name = NULL; } return device_option_name; } // @brief // Auxiliary function invoked by IoTHubTransport_AMQP_Common_SetOption to set an option on every registered device. // @returns // 0 if it succeeds, non-zero otherwise. static int IoTHubTransport_AMQP_Common_Device_SetOption(TRANSPORT_LL_HANDLE handle, const char* option, void* value) { int result; const char* device_option; if ((device_option = get_device_option_name_from(option)) == NULL) { LogError("failed setting option '%s' to registered device (could not match name to options supported by device)", option); result = __FAILURE__; } else { AMQP_TRANSPORT_INSTANCE* instance = (AMQP_TRANSPORT_INSTANCE*)handle; result = RESULT_OK; LIST_ITEM_HANDLE list_item = singlylinkedlist_get_head_item(instance->registered_devices); while (list_item != NULL) { AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device; if ((registered_device = (AMQP_TRANSPORT_DEVICE_INSTANCE*)singlylinkedlist_item_get_value(list_item)) == NULL) { LogError("failed setting option '%s' to registered device (singlylinkedlist_item_get_value failed)", option); result = __FAILURE__; break; } else if (device_set_option(registered_device->device_handle, device_option, value) != RESULT_OK) { LogError("failed setting option '%s' to registered device '%s' (device_set_option failed)", option, STRING_c_str(registered_device->device_id)); result = __FAILURE__; break; } list_item = singlylinkedlist_get_next_item(list_item); } } return result; } static void internal_destroy_instance(AMQP_TRANSPORT_INSTANCE* instance) { if (instance != NULL) { update_state(instance, AMQP_TRANSPORT_STATE_BEING_DESTROYED); if (instance->registered_devices != NULL) { LIST_ITEM_HANDLE list_item = singlylinkedlist_get_head_item(instance->registered_devices); while (list_item != NULL) { AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device = (AMQP_TRANSPORT_DEVICE_INSTANCE*)singlylinkedlist_item_get_value(list_item); list_item = singlylinkedlist_get_next_item(list_item); IoTHubTransport_AMQP_Common_Unregister(registered_device); } singlylinkedlist_destroy(instance->registered_devices); } if (instance->amqp_connection != NULL) { amqp_connection_destroy(instance->amqp_connection); } destroy_underlying_io_transport(instance); destroy_underlying_io_transport_options(instance); retry_control_destroy(instance->connection_retry_control); STRING_delete(instance->iothub_host_fqdn); /* SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_043: [ `IoTHubTransport_AMQP_Common_Destroy` shall free the stored proxy options. ]*/ free_proxy_data(instance); free(instance); } } // ---------- SendMessageDisposition helpers ---------- // static DEVICE_MESSAGE_DISPOSITION_INFO* create_device_message_disposition_info_from(MESSAGE_CALLBACK_INFO* message_data) { DEVICE_MESSAGE_DISPOSITION_INFO* result; if ((result = (DEVICE_MESSAGE_DISPOSITION_INFO*)malloc(sizeof(DEVICE_MESSAGE_DISPOSITION_INFO))) == NULL) { LogError("Failed creating DEVICE_MESSAGE_DISPOSITION_INFO (malloc failed)"); } else if (mallocAndStrcpy_s(&result->source, message_data->transportContext->link_name) != RESULT_OK) { LogError("Failed creating DEVICE_MESSAGE_DISPOSITION_INFO (mallocAndStrcpy_s failed)"); free(result); result = NULL; } else { result->message_id = message_data->transportContext->message_id; } return result; } static void destroy_device_message_disposition_info(DEVICE_MESSAGE_DISPOSITION_INFO* device_message_disposition_info) { free(device_message_disposition_info->source); free(device_message_disposition_info); } // ---------- API functions ---------- // TRANSPORT_LL_HANDLE IoTHubTransport_AMQP_Common_Create(const IOTHUBTRANSPORT_CONFIG* config, AMQP_GET_IO_TRANSPORT get_io_transport) { TRANSPORT_LL_HANDLE result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_001: [If `config` or `config->upperConfig` or `get_io_transport` are NULL then IoTHubTransport_AMQP_Common_Create shall fail and return NULL.] if (config == NULL || config->upperConfig == NULL || get_io_transport == NULL) { LogError("IoTHub AMQP client transport null configuration parameter (config=%p, get_io_transport=%p).", config, get_io_transport); result = NULL; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_002: [IoTHubTransport_AMQP_Common_Create shall fail and return NULL if `config->upperConfig->protocol` is NULL] else if (config->upperConfig->protocol == NULL) { LogError("Failed to create the AMQP transport common instance (NULL parameter received: protocol=%p, iotHubName=%p, iotHubSuffix=%p)", config->upperConfig->protocol, config->upperConfig->iotHubName, config->upperConfig->iotHubSuffix); result = NULL; } else { AMQP_TRANSPORT_INSTANCE* instance; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_003: [Memory shall be allocated for the transport's internal state structure (`instance`)] if ((instance = (AMQP_TRANSPORT_INSTANCE*)malloc(sizeof(AMQP_TRANSPORT_INSTANCE))) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_004: [If malloc() fails, IoTHubTransport_AMQP_Common_Create shall fail and return NULL] LogError("Could not allocate AMQP transport state (malloc failed)"); result = NULL; } else { memset(instance, 0, sizeof(AMQP_TRANSPORT_INSTANCE)); instance->amqp_connection_state = AMQP_CONNECTION_STATE_CLOSED; instance->preferred_authentication_mode = AMQP_TRANSPORT_AUTHENTICATION_MODE_NOT_SET; instance->state = AMQP_TRANSPORT_STATE_NOT_CONNECTED; instance->authorization_module = config->auth_module_handle; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_124: [`instance->connection_retry_control` shall be set using retry_control_create(), passing defaults EXPONENTIAL_BACKOFF_WITH_JITTER and 0] if ((instance->connection_retry_control = retry_control_create(DEFAULT_RETRY_POLICY, DEFAULT_MAX_RETRY_TIME_IN_SECS)) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_125: [If retry_control_create() fails, IoTHubTransport_AMQP_Common_Create shall fail and return NULL] LogError("Failed to create the connection retry control."); result = NULL; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_005: [If `config->upperConfig->protocolGatewayHostName` is NULL, `instance->iothub_target_fqdn` shall be set as `config->upperConfig->iotHubName` + "." + `config->upperConfig->iotHubSuffix`] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_006: [If `config->upperConfig->protocolGatewayHostName` is not NULL, `instance->iothub_target_fqdn` shall be set with a copy of it] else if ((instance->iothub_host_fqdn = get_target_iothub_fqdn(config)) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_007: [If `instance->iothub_target_fqdn` fails to be set, IoTHubTransport_AMQP_Common_Create shall fail and return NULL] LogError("Failed to obtain the iothub target fqdn."); result = NULL; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_008: [`instance->registered_devices` shall be set using singlylinkedlist_create()] else if ((instance->registered_devices = singlylinkedlist_create()) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_009: [If singlylinkedlist_create() fails, IoTHubTransport_AMQP_Common_Create shall fail and return NULL] LogError("Failed to initialize the internal list of registered devices (singlylinkedlist_create failed)"); result = NULL; } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_010: [`get_io_transport` shall be saved on `instance->underlying_io_transport_provider`] instance->underlying_io_transport_provider = get_io_transport; instance->is_trace_on = false; instance->option_sas_token_lifetime_secs = DEFAULT_SAS_TOKEN_LIFETIME_SECS; instance->option_sas_token_refresh_time_secs = DEFAULT_SAS_TOKEN_REFRESH_TIME_SECS; instance->option_cbs_request_timeout_secs = DEFAULT_CBS_REQUEST_TIMEOUT_SECS; instance->option_send_event_timeout_secs = DEFAULT_EVENT_SEND_TIMEOUT_SECS; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_012: [If IoTHubTransport_AMQP_Common_Create succeeds it shall return a pointer to `instance`.] result = (TRANSPORT_LL_HANDLE)instance; } if (result == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_011: [If IoTHubTransport_AMQP_Common_Create fails it shall free any memory it allocated] internal_destroy_instance(instance); } } } return result; } IOTHUB_PROCESS_ITEM_RESULT IoTHubTransport_AMQP_Common_ProcessItem(TRANSPORT_LL_HANDLE handle, IOTHUB_IDENTITY_TYPE item_type, IOTHUB_IDENTITY_INFO* iothub_item) { (void)handle; (void)item_type; (void)iothub_item; LogError("Currently Not Supported."); return IOTHUB_PROCESS_ERROR; } void IoTHubTransport_AMQP_Common_DoWork(TRANSPORT_LL_HANDLE handle, IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle) { (void)iotHubClientHandle; // unused as of now. // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_016: [If `handle` is NULL, IoTHubTransport_AMQP_Common_DoWork shall return without doing any work] if (handle == NULL) { LogError("IoTHubClient DoWork failed: transport handle parameter is NULL."); } else { AMQP_TRANSPORT_INSTANCE* transport_instance = (AMQP_TRANSPORT_INSTANCE*)handle; LIST_ITEM_HANDLE list_item; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_017: [If `instance->state` is `RECONNECTION_REQUIRED`, IoTHubTransport_AMQP_Common_DoWork shall attempt to trigger the connection-retry logic and return] if (transport_instance->state == AMQP_TRANSPORT_STATE_RECONNECTION_REQUIRED) { RETRY_ACTION retry_action; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_126: [The connection retry shall be attempted only if retry_control_should_retry() returns RETRY_ACTION_NOW, or if it fails] if (retry_control_should_retry(transport_instance->connection_retry_control, &retry_action) != RESULT_OK) { LogError("retry_control_should_retry() failed; assuming immediate connection retry for safety."); retry_action = RETRY_ACTION_RETRY_NOW; } if (retry_action == RETRY_ACTION_RETRY_NOW) { prepare_for_connection_retry(transport_instance); } } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_018: [If there are no devices registered on the transport, IoTHubTransport_AMQP_Common_DoWork shall skip do_work for devices] else if ((list_item = singlylinkedlist_get_head_item(transport_instance->registered_devices)) != NULL) { // We need to check if there are devices, otherwise the amqp_connection won't be able to be created since // there is not a preferred authentication mode set yet on the transport. // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_019: [If `instance->amqp_connection` is NULL, it shall be established] if (transport_instance->amqp_connection == NULL && establish_amqp_connection(transport_instance) != RESULT_OK) { LogError("AMQP transport failed to establish connection with service."); update_state(transport_instance, AMQP_TRANSPORT_STATE_RECONNECTION_REQUIRED); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_020: [If the amqp_connection is OPENED, the transport shall iterate through each registered device and perform a device-specific do_work on each] else if (transport_instance->amqp_connection_state == AMQP_CONNECTION_STATE_OPENED) { while (list_item != NULL) { AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device; if ((registered_device = (AMQP_TRANSPORT_DEVICE_INSTANCE*)singlylinkedlist_item_get_value(list_item)) == NULL) { LogError("Transport had an unexpected failure during DoWork (failed to fetch a registered_devices list item value)"); } else if (registered_device->number_of_send_event_complete_failures >= MAX_NUMBER_OF_DEVICE_FAILURES) { LogError("Device '%s' reported a critical failure (events completed sending with failures); connection retry will be triggered.", STRING_c_str(registered_device->device_id)); update_state(transport_instance, AMQP_TRANSPORT_STATE_RECONNECTION_REQUIRED); } else if (IoTHubTransport_AMQP_Common_Device_DoWork(registered_device) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_021: [If DoWork fails for the registered device for more than MAX_NUMBER_OF_DEVICE_FAILURES, connection retry shall be triggered] if (registered_device->number_of_previous_failures >= MAX_NUMBER_OF_DEVICE_FAILURES) { LogError("Device '%s' reported a critical failure; connection retry will be triggered.", STRING_c_str(registered_device->device_id)); update_state(transport_instance, AMQP_TRANSPORT_STATE_RECONNECTION_REQUIRED); } } list_item = singlylinkedlist_get_next_item(list_item); } } } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_022: [If `instance->amqp_connection` is not NULL, amqp_connection_do_work shall be invoked] if (transport_instance->amqp_connection != NULL) { amqp_connection_do_work(transport_instance->amqp_connection); } } } int IoTHubTransport_AMQP_Common_Subscribe(IOTHUB_DEVICE_HANDLE handle) { int result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_084: [If `handle` is NULL, IoTHubTransport_AMQP_Common_Subscribe shall return a non-zero result] if (handle == NULL) { LogError("Invalid handle to IoTHubClient AMQP transport device handle."); result = __FAILURE__; } else { AMQP_TRANSPORT_DEVICE_INSTANCE* amqp_device_instance = (AMQP_TRANSPORT_DEVICE_INSTANCE*)handle; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_085: [If `amqp_device_instance` is not registered, IoTHubTransport_AMQP_Common_Subscribe shall return a non-zero result] if (!is_device_registered(amqp_device_instance)) { LogError("Device '%s' failed subscribing to cloud-to-device messages (device is not registered)", STRING_c_str(amqp_device_instance->device_id)); result = __FAILURE__; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_086: [device_subscribe_message() shall be invoked passing `on_message_received_callback`] else if (device_subscribe_message(amqp_device_instance->device_handle, on_message_received, amqp_device_instance) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_087: [If device_subscribe_message() fails, IoTHubTransport_AMQP_Common_Subscribe shall return a non-zero result] LogError("Device '%s' failed subscribing to cloud-to-device messages (device_subscribe_message failed)", STRING_c_str(amqp_device_instance->device_id)); result = __FAILURE__; } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_088: [If no failures occur, IoTHubTransport_AMQP_Common_Subscribe shall return 0] result = RESULT_OK; } } return result; } void IoTHubTransport_AMQP_Common_Unsubscribe(IOTHUB_DEVICE_HANDLE handle) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_093: [If `handle` is NULL, IoTHubTransport_AMQP_Common_Subscribe shall return] if (handle == NULL) { LogError("Invalid handle to IoTHubClient AMQP transport device handle."); } else { AMQP_TRANSPORT_DEVICE_INSTANCE* amqp_device_instance = (AMQP_TRANSPORT_DEVICE_INSTANCE*)handle; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_094: [If `amqp_device_instance` is not registered, IoTHubTransport_AMQP_Common_Subscribe shall return] if (!is_device_registered(amqp_device_instance)) { LogError("Device '%s' failed unsubscribing to cloud-to-device messages (device is not registered)", STRING_c_str(amqp_device_instance->device_id)); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_095: [device_unsubscribe_message() shall be invoked passing `amqp_device_instance->device_handle`] else if (device_unsubscribe_message(amqp_device_instance->device_handle) != RESULT_OK) { LogError("Device '%s' failed unsubscribing to cloud-to-device messages (device_unsubscribe_message failed)", STRING_c_str(amqp_device_instance->device_id)); } } } int IoTHubTransport_AMQP_Common_Subscribe_DeviceTwin(IOTHUB_DEVICE_HANDLE handle) { (void)handle; /*Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_02_009: [ IoTHubTransport_AMQP_Common_Subscribe_DeviceTwin shall return a non-zero value. ]*/ int result = __FAILURE__; LogError("IoTHubTransport_AMQP_Common_Subscribe_DeviceTwin Not supported"); return result; } void IoTHubTransport_AMQP_Common_Unsubscribe_DeviceTwin(IOTHUB_DEVICE_HANDLE handle) { (void)handle; /*Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_02_010: [ IoTHubTransport_AMQP_Common_Unsubscribe_DeviceTwin shall return. ]*/ LogError("IoTHubTransport_AMQP_Common_Unsubscribe_DeviceTwin Not supported"); } int IoTHubTransport_AMQP_Common_Subscribe_DeviceMethod(IOTHUB_DEVICE_HANDLE handle) { int result; if (handle == NULL) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_004: [ If `handle` is NULL, `IoTHubTransport_AMQP_Common_Subscribe_DeviceMethod` shall fail and return a non-zero value. ] */ LogError("NULL handle"); result = __FAILURE__; } else { #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ AMQP_TRANSPORT_DEVICE_INSTANCE* device_state = (AMQP_TRANSPORT_DEVICE_INSTANCE*)handle; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_026: [ `IoTHubTransport_AMQP_Common_Subscribe_DeviceMethod` shall remember that a subscribe is to be performed in the next call to DoWork and on success it shall return 0. ]*/ /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_005: [ If the transport is already subscribed to receive C2D method requests, `IoTHubTransport_AMQP_Common_Subscribe_DeviceMethod` shall perform no additional action and return 0. ]*/ device_state->subscribe_methods_needed = true; device_state->subscribed_for_methods = false; result = 0; #else LogError("Not implemented"); result = __FAILURE__; #endif } return result; } void IoTHubTransport_AMQP_Common_Unsubscribe_DeviceMethod(IOTHUB_DEVICE_HANDLE handle) { if (handle == NULL) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_006: [ If `handle` is NULL, `IoTHubTransport_AMQP_Common_Unsubscribe_DeviceMethod` shall do nothing. ]*/ LogError("NULL handle"); } else { #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ AMQP_TRANSPORT_DEVICE_INSTANCE* device_state = (AMQP_TRANSPORT_DEVICE_INSTANCE*)handle; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_008: [ If the transport is not subscribed to receive C2D method requests then `IoTHubTransport_AMQP_Common_Unsubscribe_DeviceMethod` shall do nothing. ]*/ if (device_state->subscribe_methods_needed) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_007: [ `IoTHubTransport_AMQP_Common_Unsubscribe_DeviceMethod` shall unsubscribe from receiving C2D method requests by calling `iothubtransportamqp_methods_unsubscribe`. ]*/ device_state->subscribed_for_methods = false; device_state->subscribe_methods_needed = false; iothubtransportamqp_methods_unsubscribe(device_state->methods_handle); } #else LogError("Not implemented"); #endif } } int IoTHubTransport_AMQP_Common_DeviceMethod_Response(IOTHUB_DEVICE_HANDLE handle, METHOD_HANDLE methodId, const unsigned char* response, size_t response_size, int status_response) { (void)response; (void)response_size; (void)status_response; (void)methodId; int result; AMQP_TRANSPORT_DEVICE_INSTANCE* device_state = (AMQP_TRANSPORT_DEVICE_INSTANCE*)handle; if (device_state != NULL) { #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ IOTHUBTRANSPORT_AMQP_METHOD_HANDLE saved_handle = (IOTHUBTRANSPORT_AMQP_METHOD_HANDLE)methodId; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_019: [ `IoTHubTransport_AMQP_Common_DeviceMethod_Response` shall call `iothubtransportamqp_methods_respond` passing to it the `method_handle` argument, the response bytes, response size and the status code. ]*/ if (iothubtransportamqp_methods_respond(saved_handle, response, response_size, status_response) != 0) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_029: [ If `iothubtransportamqp_methods_respond` fails, `on_methods_request_received` shall return a non-zero value. ]*/ LogError("iothubtransportamqp_methods_respond failed"); result = __FAILURE__; } else { result = 0; } #else result = 0; LogError("Not implemented"); #endif } else { result = __FAILURE__; } return result; } IOTHUB_CLIENT_RESULT IoTHubTransport_AMQP_Common_GetSendStatus(IOTHUB_DEVICE_HANDLE handle, IOTHUB_CLIENT_STATUS *iotHubClientStatus) { IOTHUB_CLIENT_RESULT result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_096: [If `handle` or `iotHubClientStatus` are NULL, IoTHubTransport_AMQP_Common_GetSendStatus shall return IOTHUB_CLIENT_INVALID_ARG] if (handle == NULL || iotHubClientStatus == NULL) { result = IOTHUB_CLIENT_INVALID_ARG; LogError("Failed retrieving the device send status (either handle (%p) or iotHubClientStatus (%p) are NULL)", handle, iotHubClientStatus); } else { AMQP_TRANSPORT_DEVICE_INSTANCE* amqp_device_state = (AMQP_TRANSPORT_DEVICE_INSTANCE*)handle; DEVICE_SEND_STATUS device_send_status; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_097: [IoTHubTransport_AMQP_Common_GetSendStatus shall invoke device_get_send_status()] if (device_get_send_status(amqp_device_state->device_handle, &device_send_status) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_098: [If device_get_send_status() fails, IoTHubTransport_AMQP_Common_GetSendStatus shall return IOTHUB_CLIENT_ERROR] LogError("Failed retrieving the device send status (device_get_send_status failed)"); result = IOTHUB_CLIENT_ERROR; } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_099: [If device_get_send_status() returns DEVICE_SEND_STATUS_BUSY, IoTHubTransport_AMQP_Common_GetSendStatus shall return IOTHUB_CLIENT_OK and status IOTHUB_CLIENT_SEND_STATUS_BUSY] if (device_send_status == DEVICE_SEND_STATUS_BUSY) { *iotHubClientStatus = IOTHUB_CLIENT_SEND_STATUS_BUSY; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_100: [If device_get_send_status() returns DEVICE_SEND_STATUS_IDLE, IoTHubTransport_AMQP_Common_GetSendStatus shall return IOTHUB_CLIENT_OK and status IOTHUB_CLIENT_SEND_STATUS_IDLE] else // DEVICE_SEND_STATUS_IDLE { *iotHubClientStatus = IOTHUB_CLIENT_SEND_STATUS_IDLE; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_109: [If no failures occur, IoTHubTransport_AMQP_Common_GetSendStatus shall return IOTHUB_CLIENT_OK] result = IOTHUB_CLIENT_OK; } } return result; } IOTHUB_CLIENT_RESULT IoTHubTransport_AMQP_Common_SetOption(TRANSPORT_LL_HANDLE handle, const char* option, const void* value) { IOTHUB_CLIENT_RESULT result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_101: [If `handle`, `option` or `value` are NULL then IoTHubTransport_AMQP_Common_SetOption shall return IOTHUB_CLIENT_INVALID_ARG.] if ((handle == NULL) || (option == NULL) || (value == NULL)) { LogError("Invalid parameter (NULL) passed to AMQP transport SetOption (handle=%p, options=%p, value=%p)", handle, option, value); result = IOTHUB_CLIENT_INVALID_ARG; } else { AMQP_TRANSPORT_INSTANCE* transport_instance = (AMQP_TRANSPORT_INSTANCE*)handle; bool is_device_specific_option; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_102: [If `option` is a device-specific option, it shall be saved and applied to each registered device using device_set_option()] if (strcmp(OPTION_SAS_TOKEN_LIFETIME, option) == 0) { is_device_specific_option = true; transport_instance->option_sas_token_lifetime_secs = *(size_t*)value; } else if (strcmp(OPTION_SAS_TOKEN_REFRESH_TIME, option) == 0) { is_device_specific_option = true; transport_instance->option_sas_token_refresh_time_secs = *(size_t*)value; } else if (strcmp(OPTION_CBS_REQUEST_TIMEOUT, option) == 0) { is_device_specific_option = true; transport_instance->option_cbs_request_timeout_secs = *(size_t*)value; } else if (strcmp(OPTION_EVENT_SEND_TIMEOUT_SECS, option) == 0) { is_device_specific_option = true; transport_instance->option_send_event_timeout_secs = *(size_t*)value; } else { is_device_specific_option = false; } if (is_device_specific_option) { if (IoTHubTransport_AMQP_Common_Device_SetOption(handle, option, (void*)value) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_103: [If device_set_option() fails, IoTHubTransport_AMQP_Common_SetOption shall return IOTHUB_CLIENT_ERROR] LogError("transport failed setting option '%s' (failed setting option on one or more registered devices)", option); result = IOTHUB_CLIENT_ERROR; } else { result = IOTHUB_CLIENT_OK; } } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_104: [If `option` is `logtrace`, `value` shall be saved and applied to `instance->connection` using amqp_connection_set_logging()] else if (strcmp(OPTION_LOG_TRACE, option) == 0) { transport_instance->is_trace_on = *((bool*)value); if (transport_instance->amqp_connection != NULL && amqp_connection_set_logging(transport_instance->amqp_connection, transport_instance->is_trace_on) != RESULT_OK) { LogError("transport failed setting option '%s' (amqp_connection_set_logging failed)", option); result = IOTHUB_CLIENT_ERROR; } else { result = IOTHUB_CLIENT_OK; } } else if (strcmp(OPTION_HTTP_PROXY, option) == 0) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_032: [ If `option` is `proxy_data`, `value` shall be used as an `HTTP_PROXY_OPTIONS*`. ]*/ HTTP_PROXY_OPTIONS* proxy_options = (HTTP_PROXY_OPTIONS*)value; if (transport_instance->tls_io != NULL) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_038: [ If the underlying IO has already been created, then `IoTHubTransport_AMQP_Common_SetOption` shall fail and return `IOTHUB_CLIENT_ERROR`. ]*/ LogError("Cannot set proxy option once the underlying IO is created"); result = IOTHUB_CLIENT_ERROR; } else if (proxy_options->host_address == NULL) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_034: [ If `host_address` is NULL, `IoTHubTransport_AMQP_Common_SetOption` shall fail and return `IOTHUB_CLIENT_INVALID_ARG`. ]*/ LogError("NULL host_address in proxy options"); result = IOTHUB_CLIENT_INVALID_ARG; } /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_037: [ If only one of `username` and `password` is NULL, `IoTHubTransport_AMQP_Common_SetOption` shall fail and return `IOTHUB_CLIENT_INVALID_ARG`. ]*/ else if (((proxy_options->username == NULL) || (proxy_options->password == NULL)) && (proxy_options->username != proxy_options->password)) { LogError("Only one of username and password for proxy settings was NULL"); result = IOTHUB_CLIENT_INVALID_ARG; } else { char* copied_proxy_hostname = NULL; char* copied_proxy_username = NULL; char* copied_proxy_password = NULL; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_033: [ The fields `host_address`, `port`, `username` and `password` shall be saved for later used (needed when creating the underlying IO to be used by the transport). ]*/ transport_instance->http_proxy_port = proxy_options->port; if (mallocAndStrcpy_s(&copied_proxy_hostname, proxy_options->host_address) != 0) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_035: [ If copying `host_address`, `username` or `password` fails, `IoTHubTransport_AMQP_Common_SetOption` shall fail and return `IOTHUB_CLIENT_ERROR`. ]*/ LogError("Cannot copy HTTP proxy hostname"); result = IOTHUB_CLIENT_ERROR; } /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_036: [ `username` and `password` shall be allowed to be NULL. ]*/ else if ((proxy_options->username != NULL) && (mallocAndStrcpy_s(&copied_proxy_username, proxy_options->username) != 0)) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_035: [ If copying `host_address`, `username` or `password` fails, `IoTHubTransport_AMQP_Common_SetOption` shall fail and return `IOTHUB_CLIENT_ERROR`. ]*/ free(copied_proxy_hostname); LogError("Cannot copy HTTP proxy username"); result = IOTHUB_CLIENT_ERROR; } /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_036: [ `username` and `password` shall be allowed to be NULL. ]*/ else if ((proxy_options->password != NULL) && (mallocAndStrcpy_s(&copied_proxy_password, proxy_options->password) != 0)) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_035: [ If copying `host_address`, `username` or `password` fails, `IoTHubTransport_AMQP_Common_SetOption` shall fail and return `IOTHUB_CLIENT_ERROR`. ]*/ if (copied_proxy_username != NULL) { free(copied_proxy_username); } free(copied_proxy_hostname); LogError("Cannot copy HTTP proxy password"); result = IOTHUB_CLIENT_ERROR; } else { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_040: [ When setting the proxy options succeeds any previously saved proxy options shall be freed. ]*/ free_proxy_data(transport_instance); transport_instance->http_proxy_hostname = copied_proxy_hostname; transport_instance->http_proxy_username = copied_proxy_username; transport_instance->http_proxy_password = copied_proxy_password; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_039: [ If setting the `proxy_data` option succeeds, `IoTHubTransport_AMQP_Common_SetOption` shall return `IOTHUB_CLIENT_OK` ]*/ result = IOTHUB_CLIENT_OK; } } } else { result = IOTHUB_CLIENT_OK; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_02_007: [ If `option` is `x509certificate` and the transport preferred authentication method is not x509 then IoTHubTransport_AMQP_Common_SetOption shall return IOTHUB_CLIENT_INVALID_ARG. ] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_02_008: [ If `option` is `x509privatekey` and the transport preferred authentication method is not x509 then IoTHubTransport_AMQP_Common_SetOption shall return IOTHUB_CLIENT_INVALID_ARG. ] if (strcmp(OPTION_X509_CERT, option) == 0 || strcmp(OPTION_X509_PRIVATE_KEY, option) == 0) { if (transport_instance->preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_NOT_SET) { transport_instance->preferred_authentication_mode = AMQP_TRANSPORT_AUTHENTICATION_MODE_X509; } else if (transport_instance->preferred_authentication_mode != AMQP_TRANSPORT_AUTHENTICATION_MODE_X509) { LogError("transport failed setting option '%s' (preferred authentication method is not x509)", option); result = IOTHUB_CLIENT_INVALID_ARG; } else { IoTHubClient_Auth_Set_x509_Type(transport_instance->authorization_module, true); } } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_105: [If `option` does not match one of the options handled by this module, it shall be passed to `instance->tls_io` using xio_setoption()] if (result != IOTHUB_CLIENT_INVALID_ARG) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_106: [If `instance->tls_io` is NULL, it shall be set invoking instance->underlying_io_transport_provider()] if (transport_instance->tls_io == NULL && get_new_underlying_io_transport(transport_instance, &transport_instance->tls_io) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_107: [If instance->underlying_io_transport_provider() fails, IoTHubTransport_AMQP_Common_SetOption shall fail and return IOTHUB_CLIENT_ERROR] LogError("transport failed setting option '%s' (failed to obtain a TLS I/O transport).", option); result = IOTHUB_CLIENT_ERROR; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_108: [When `instance->tls_io` is created, IoTHubTransport_AMQP_Common_SetOption shall apply `instance->saved_tls_options` with OptionHandler_FeedOptions()] else if (xio_setoption(transport_instance->tls_io, option, value) != RESULT_OK) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_03_001: [If xio_setoption fails, IoTHubTransport_AMQP_Common_SetOption shall return IOTHUB_CLIENT_ERROR.] LogError("transport failed setting option '%s' (xio_setoption failed)", option); result = IOTHUB_CLIENT_ERROR; } else { if (save_underlying_io_transport_options(transport_instance) != RESULT_OK) { LogError("IoTHubTransport_AMQP_Common_SetOption failed to save underlying I/O options; failure will be ignored"); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_03_001: [If no failures occur, IoTHubTransport_AMQP_Common_SetOption shall return IOTHUB_CLIENT_OK.] result = IOTHUB_CLIENT_OK; } } } } return result; } IOTHUB_DEVICE_HANDLE IoTHubTransport_AMQP_Common_Register(TRANSPORT_LL_HANDLE handle, const IOTHUB_DEVICE_CONFIG* device, IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle, PDLIST_ENTRY waitingToSend) { #ifdef NO_LOGGING UNUSED(iotHubClientHandle); #endif IOTHUB_DEVICE_HANDLE result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_17_005: [If `handle`, `device`, `iotHubClientHandle` or `waitingToSend` is NULL, IoTHubTransport_AMQP_Common_Register shall return NULL] if ((handle == NULL) || (device == NULL) || (waitingToSend == NULL) || (iotHubClientHandle == NULL)) { LogError("invalid parameter TRANSPORT_LL_HANDLE handle=%p, const IOTHUB_DEVICE_CONFIG* device=%p, IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle=%p, PDLIST_ENTRY waiting_to_send=%p", handle, device, iotHubClientHandle, waitingToSend); result = NULL; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_03_002: [IoTHubTransport_AMQP_Common_Register shall return NULL if `device->deviceId` is NULL.] else if (device->deviceId == NULL) { LogError("Transport failed to register device (device_id provided is NULL)"); result = NULL; } else { LIST_ITEM_HANDLE list_item; AMQP_TRANSPORT_INSTANCE* transport_instance = (AMQP_TRANSPORT_INSTANCE*)handle; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_064: [If the device is already registered, IoTHubTransport_AMQP_Common_Register shall fail and return NULL.] if (is_device_registered_ex(transport_instance->registered_devices, device->deviceId, &list_item)) { LogError("IoTHubTransport_AMQP_Common_Register failed (device '%s' already registered on this transport instance)", device->deviceId); result = NULL; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_065: [IoTHubTransport_AMQP_Common_Register shall fail and return NULL if the device is not using an authentication mode compatible with the currently used by the transport.] else if (!is_device_credential_acceptable(device, transport_instance->preferred_authentication_mode)) { LogError("Transport failed to register device '%s' (device credential was not accepted)", device->deviceId); result = NULL; } else { AMQP_TRANSPORT_DEVICE_INSTANCE* amqp_device_instance; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_066: [IoTHubTransport_AMQP_Common_Register shall allocate an instance of AMQP_TRANSPORT_DEVICE_INSTANCE to store the state of the new registered device.] if ((amqp_device_instance = (AMQP_TRANSPORT_DEVICE_INSTANCE*)malloc(sizeof(AMQP_TRANSPORT_DEVICE_INSTANCE))) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_067: [If malloc fails, IoTHubTransport_AMQP_Common_Register shall fail and return NULL.] LogError("Transport failed to register device '%s' (failed to create the device state instance; malloc failed)", device->deviceId); result = NULL; } else { memset(amqp_device_instance, 0, sizeof(AMQP_TRANSPORT_DEVICE_INSTANCE)); char* local_product_info = NULL; void* product_info; if ((IoTHubClient_LL_GetOption(iotHubClientHandle, OPTION_PRODUCT_INFO, &product_info) != IOTHUB_CLIENT_OK) || (product_info == NULL)) { mallocAndStrcpy_s(&local_product_info, CLIENT_DEVICE_TYPE_PREFIX CLIENT_DEVICE_BACKSLASH IOTHUB_SDK_VERSION); } else { mallocAndStrcpy_s(&local_product_info, STRING_c_str((STRING_HANDLE)product_info)); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_068: [IoTHubTransport_AMQP_Common_Register shall save the handle references to the IoTHubClient, transport, waitingToSend list on `amqp_device_instance`.] amqp_device_instance->iothub_client_handle = iotHubClientHandle; amqp_device_instance->transport_instance = transport_instance; amqp_device_instance->waiting_to_send = waitingToSend; amqp_device_instance->device_state = DEVICE_STATE_STOPPED; amqp_device_instance->max_state_change_timeout_secs = DEFAULT_DEVICE_STATE_CHANGE_TIMEOUT_SECS; #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ amqp_device_instance->subscribe_methods_needed = false; amqp_device_instance->subscribed_for_methods = false; #endif // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_069: [A copy of `config->deviceId` shall be saved into `device_state->device_id`] if ((amqp_device_instance->device_id = STRING_construct(device->deviceId)) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_070: [If STRING_construct() fails, IoTHubTransport_AMQP_Common_Register shall fail and return NULL] LogError("Transport failed to register device '%s' (failed to copy the deviceId)", device->deviceId); result = NULL; } else { DEVICE_CONFIG device_config; memset(&device_config, 0, sizeof(DEVICE_CONFIG)); device_config.iothub_host_fqdn = (char*)STRING_c_str(transport_instance->iothub_host_fqdn); device_config.authorization_module = device->authorization_module; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_072: [The configuration for device_create shall be set according to the authentication preferred by IOTHUB_DEVICE_CONFIG] device_config.authentication_mode = (device->deviceKey != NULL || device->deviceSasToken != NULL ? DEVICE_AUTH_MODE_CBS : DEVICE_AUTH_MODE_X509); device_config.on_state_changed_callback = on_device_state_changed_callback; device_config.on_state_changed_context = amqp_device_instance; device_config.product_info = local_product_info; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_071: [`amqp_device_instance->device_handle` shall be set using device_create()] if ((amqp_device_instance->device_handle = device_create(&device_config)) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_073: [If device_create() fails, IoTHubTransport_AMQP_Common_Register shall fail and return NULL] LogError("Transport failed to register device '%s' (failed to create the DEVICE_HANDLE instance)", device->deviceId); result = NULL; } else { bool is_first_device_being_registered = (singlylinkedlist_get_head_item(transport_instance->registered_devices) == NULL); #ifdef WIP_C2D_METHODS_AMQP /* This feature is WIP, do not use yet */ /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_010: [ `IoTHubTransport_AMQP_Common_Create` shall create a new iothubtransportamqp_methods instance by calling `iothubtransportamqp_methods_create` while passing to it the the fully qualified domain name and the device Id. ]*/ amqp_device_instance->methods_handle = iothubtransportamqp_methods_create(STRING_c_str(transport_instance->iothub_host_fqdn), device->deviceId); if (amqp_device_instance->methods_handle == NULL) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_011: [ If `iothubtransportamqp_methods_create` fails, `IoTHubTransport_AMQP_Common_Create` shall fail and return NULL. ]*/ LogError("Transport failed to register device '%s' (Cannot create the methods module)", device->deviceId); result = NULL; } else #endif if (replicate_device_options_to(amqp_device_instance, device_config.authentication_mode) != RESULT_OK) { LogError("Transport failed to register device '%s' (failed to replicate options)", device->deviceId); result = NULL; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_074: [IoTHubTransport_AMQP_Common_Register shall add the `amqp_device_instance` to `instance->registered_devices`] else if (singlylinkedlist_add(transport_instance->registered_devices, amqp_device_instance) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_075: [If it fails to add `amqp_device_instance`, IoTHubTransport_AMQP_Common_Register shall fail and return NULL] LogError("Transport failed to register device '%s' (singlylinkedlist_add failed)", device->deviceId); result = NULL; } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_076: [If the device is the first being registered on the transport, IoTHubTransport_AMQP_Common_Register shall save its authentication mode as the transport preferred authentication mode] if (transport_instance->preferred_authentication_mode == AMQP_TRANSPORT_AUTHENTICATION_MODE_NOT_SET && is_first_device_being_registered) { if (device_config.authentication_mode == DEVICE_AUTH_MODE_CBS) { transport_instance->preferred_authentication_mode = AMQP_TRANSPORT_AUTHENTICATION_MODE_CBS; } else { transport_instance->preferred_authentication_mode = AMQP_TRANSPORT_AUTHENTICATION_MODE_X509; } } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_078: [IoTHubTransport_AMQP_Common_Register shall return a handle to `amqp_device_instance` as a IOTHUB_DEVICE_HANDLE] result = (IOTHUB_DEVICE_HANDLE)amqp_device_instance; } } } if (result == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_077: [If IoTHubTransport_AMQP_Common_Register fails, it shall free all memory it allocated] internal_destroy_amqp_device_instance(amqp_device_instance); } free(local_product_info); } } } return result; } void IoTHubTransport_AMQP_Common_Unregister(IOTHUB_DEVICE_HANDLE deviceHandle) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_079: [if `deviceHandle` provided is NULL, IoTHubTransport_AMQP_Common_Unregister shall return.] if (deviceHandle == NULL) { LogError("Failed to unregister device (deviceHandle is NULL)."); } else { AMQP_TRANSPORT_DEVICE_INSTANCE* registered_device = (AMQP_TRANSPORT_DEVICE_INSTANCE*)deviceHandle; const char* device_id; LIST_ITEM_HANDLE list_item; if ((device_id = STRING_c_str(registered_device->device_id)) == NULL) { LogError("Failed to unregister device (failed to get device id char ptr)"); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_080: [if `deviceHandle` has a NULL reference to its transport instance, IoTHubTransport_AMQP_Common_Unregister shall return.] else if (registered_device->transport_instance == NULL) { LogError("Failed to unregister device '%s' (deviceHandle does not have a transport state associated to).", device_id); } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_081: [If the device is not registered with this transport, IoTHubTransport_AMQP_Common_Unregister shall return] else if (!is_device_registered_ex(registered_device->transport_instance->registered_devices, device_id, &list_item)) { LogError("Failed to unregister device '%s' (device is not registered within this transport).", device_id); } else { // Removing it first so the race hazzard is reduced between this function and DoWork. Best would be to use locks. if (singlylinkedlist_remove(registered_device->transport_instance->registered_devices, list_item) != RESULT_OK) { LogError("Failed to unregister device '%s' (singlylinkedlist_remove failed).", device_id); } else { // TODO: Q: should we go through waiting_to_send list and raise on_event_send_complete with BECAUSE_DESTROY ? // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_01_012: [IoTHubTransport_AMQP_Common_Unregister shall destroy the C2D methods handler by calling iothubtransportamqp_methods_destroy] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_083: [IoTHubTransport_AMQP_Common_Unregister shall free all the memory allocated for the `device_instance`] internal_destroy_amqp_device_instance(registered_device); } } } } void IoTHubTransport_AMQP_Common_Destroy(TRANSPORT_LL_HANDLE handle) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_013: [If `handle` is NULL, IoTHubTransport_AMQP_Common_Destroy shall return immediatelly] if (handle == NULL) { LogError("Failed to destroy AMQP transport instance (handle is NULL)"); } else { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_014: [IoTHubTransport_AMQP_Common_Destroy shall invoke IoTHubTransport_AMQP_Common_Unregister on each of its registered devices.] // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_015: [All members of `instance` (including tls_io) shall be destroyed and its memory released] internal_destroy_instance((AMQP_TRANSPORT_INSTANCE*)handle); } } int IoTHubTransport_AMQP_Common_SetRetryPolicy(TRANSPORT_LL_HANDLE handle, IOTHUB_CLIENT_RETRY_POLICY retryPolicy, size_t retryTimeoutLimitInSeconds) { int result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_128: [If `handle` is NULL, `IoTHubTransport_AMQP_Common_SetRetryPolicy` shall fail and return non-zero.] if (handle == NULL) { LogError("Cannot set retry policy (transport handle is NULL)"); result = __FAILURE__; } else { RETRY_CONTROL_HANDLE new_retry_control; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_129: [`transport_instance->connection_retry_control` shall be set using retry_control_create(), passing `retryPolicy` and `retryTimeoutLimitInSeconds`.] if ((new_retry_control = retry_control_create(retryPolicy, (unsigned int)retryTimeoutLimitInSeconds)) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_130: [If retry_control_create() fails, `IoTHubTransport_AMQP_Common_SetRetryPolicy` shall fail and return non-zero.] LogError("Cannot set retry policy (retry_control_create failed)"); result = __FAILURE__; } else { AMQP_TRANSPORT_INSTANCE* transport_instance = (AMQP_TRANSPORT_INSTANCE*)handle; RETRY_CONTROL_HANDLE previous_retry_control = transport_instance->connection_retry_control; transport_instance->connection_retry_control = new_retry_control; retry_control_destroy(previous_retry_control); LogInfo("Retry policy set (%d, timeout = %d)", retryPolicy, retryTimeoutLimitInSeconds); // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_128: [If no errors occur, `IoTHubTransport_AMQP_Common_SetRetryPolicy` shall return zero.] result = RESULT_OK; } } return result; } STRING_HANDLE IoTHubTransport_AMQP_Common_GetHostname(TRANSPORT_LL_HANDLE handle) { STRING_HANDLE result; // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_02_001: [If `handle` is NULL, `IoTHubTransport_AMQP_Common_GetHostname` shall return NULL.] if (handle == NULL) { LogError("Cannot provide the target host name (transport handle is NULL)."); result = NULL; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_02_002: [IoTHubTransport_AMQP_Common_GetHostname shall return a copy of `instance->iothub_target_fqdn`.] else if ((result = STRING_clone(((AMQP_TRANSPORT_INSTANCE*)(handle))->iothub_host_fqdn)) == NULL) { LogError("Cannot provide the target host name (STRING_clone failed)."); } return result; } IOTHUB_CLIENT_RESULT IoTHubTransport_AMQP_Common_SendMessageDisposition(MESSAGE_CALLBACK_INFO* message_data, IOTHUBMESSAGE_DISPOSITION_RESULT disposition) { IOTHUB_CLIENT_RESULT result; if (message_data == NULL) { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_10_001: [If messageData is NULL, IoTHubTransport_AMQP_Common_SendMessageDisposition shall fail and return IOTHUB_CLIENT_INVALID_ARG.] */ LogError("Failed sending message disposition (message_data is NULL)"); result = IOTHUB_CLIENT_INVALID_ARG; } else { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_10_002: [If any of the messageData fields are NULL, IoTHubTransport_AMQP_Common_SendMessageDisposition shall fail and return IOTHUB_CLIENT_INVALID_ARG.] */ if (message_data->messageHandle == NULL || message_data->transportContext == NULL) { LogError("Failed sending message disposition (message_data->messageHandle (%p) or message_data->transportContext (%p) are NULL)", message_data->messageHandle, message_data->transportContext); result = IOTHUB_CLIENT_INVALID_ARG; } else { DEVICE_MESSAGE_DISPOSITION_INFO* device_message_disposition_info; /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_10_004: [IoTHubTransport_AMQP_Common_SendMessageDisposition shall convert the given IOTHUBMESSAGE_DISPOSITION_RESULT to the equivalent AMQP_VALUE and will return the result of calling messagereceiver_send_message_disposition. ] */ DEVICE_MESSAGE_DISPOSITION_RESULT device_disposition_result = get_device_disposition_result_from(disposition); // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_112: [A DEVICE_MESSAGE_DISPOSITION_INFO instance shall be created with a copy of the `link_name` and `message_id` contained in `message_data`] if ((device_message_disposition_info = create_device_message_disposition_info_from(message_data)) == NULL) { // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_113: [If the DEVICE_MESSAGE_DISPOSITION_INFO fails to be created, `IoTHubTransport_AMQP_Common_SendMessageDisposition()` shall fail and return IOTHUB_CLIENT_ERROR] LogError("Device '%s' failed sending message disposition (failed creating DEVICE_MESSAGE_DISPOSITION_RESULT)", STRING_c_str(message_data->transportContext->device_state->device_id)); result = IOTHUB_CLIENT_ERROR; } else { /* Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_10_003: [IoTHubTransport_AMQP_Common_SendMessageDisposition shall fail and return IOTHUB_CLIENT_ERROR if the POST message fails, otherwise return IOTHUB_CLIENT_OK.] */ if (device_send_message_disposition(message_data->transportContext->device_state->device_handle, device_message_disposition_info, device_disposition_result) != RESULT_OK) { LogError("Device '%s' failed sending message disposition (device_send_message_disposition failed)", STRING_c_str(message_data->transportContext->device_state->device_id)); result = IOTHUB_CLIENT_ERROR; } else { IoTHubMessage_Destroy(message_data->messageHandle); result = IOTHUB_CLIENT_OK; } // Codes_SRS_IOTHUBTRANSPORT_AMQP_COMMON_09_114: [`IoTHubTransport_AMQP_Common_SendMessageDisposition()` shall destroy the DEVICE_MESSAGE_DISPOSITION_INFO instance] destroy_device_message_disposition_info(device_message_disposition_info); } } MESSAGE_CALLBACK_INFO_Destroy(message_data); } return result; }