Xin Zhang
/
azure-iot-c-sdk-f767zi
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Diff: iothub_client/src/iothubtransport_mqtt_common.c
- Revision:
- 0:f7f1f0d76dd6
diff -r 000000000000 -r f7f1f0d76dd6 iothub_client/src/iothubtransport_mqtt_common.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/iothub_client/src/iothubtransport_mqtt_common.c Thu Aug 23 06:52:14 2018 +0000
@@ -0,0 +1,3353 @@
+// 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 <ctype.h>
+#include "azure_c_shared_utility/optimize_size.h"
+#include "azure_c_shared_utility/gballoc.h"
+
+#include "azure_c_shared_utility/xlogging.h"
+#include "azure_c_shared_utility/strings.h"
+#include "azure_c_shared_utility/doublylinkedlist.h"
+#include "azure_c_shared_utility/crt_abstractions.h"
+#include "azure_c_shared_utility/agenttime.h"
+
+#include "iothub_client_core_ll.h"
+#include "iothub_client_options.h"
+#include "internal/iothub_client_private.h"
+#include "azure_umqtt_c/mqtt_client.h"
+#include "azure_c_shared_utility/sastoken.h"
+#include "azure_c_shared_utility/tickcounter.h"
+
+#include "azure_c_shared_utility/tlsio.h"
+#include "azure_c_shared_utility/platform.h"
+
+#include "azure_c_shared_utility/string_tokenizer.h"
+#include "azure_c_shared_utility/shared_util_options.h"
+#include "azure_c_shared_utility/urlencode.h"
+#include "iothub_client_version.h"
+#include "internal/iothub_client_retry_control.h"
+
+#include "internal/iothubtransport_mqtt_common.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#include <limits.h>
+#include <inttypes.h>
+
+#define SAS_TOKEN_DEFAULT_LIFETIME 3600
+#define SAS_REFRESH_MULTIPLIER .8
+#define EPOCH_TIME_T_VALUE 0
+#define DEFAULT_MQTT_KEEPALIVE 4*60 // 4 min
+#define DEFAULT_CONNACK_TIMEOUT 30 // 30 seconds
+#define BUILD_CONFIG_USERNAME 24
+#define SAS_TOKEN_DEFAULT_LEN 10
+#define RESEND_TIMEOUT_VALUE_MIN 1*60
+#define MAX_SEND_RECOUNT_LIMIT 2
+#define DEFAULT_CONNECTION_INTERVAL 30
+#define FAILED_CONN_BACKOFF_VALUE 5
+#define STATUS_CODE_FAILURE_VALUE 500
+#define STATUS_CODE_TIMEOUT_VALUE 408
+
+#define DEFAULT_RETRY_POLICY IOTHUB_CLIENT_RETRY_EXPONENTIAL_BACKOFF_WITH_JITTER
+#define DEFAULT_RETRY_TIMEOUT_IN_SECONDS 0
+
+static const char TOPIC_DEVICE_TWIN_PREFIX[] = "$iothub/twin";
+static const char TOPIC_DEVICE_METHOD_PREFIX[] = "$iothub/methods";
+
+static const char* TOPIC_GET_DESIRED_STATE = "$iothub/twin/res/#";
+static const char* TOPIC_NOTIFICATION_STATE = "$iothub/twin/PATCH/properties/desired/#";
+
+static const char* TOPIC_DEVICE_MSG = "devices/%s/messages/devicebound/#";
+static const char* TOPIC_DEVICE_MODULE_MSG = "devices/%s/modules/%s/messages/devicebound/#";
+static const char* TOPIC_DEVICE_DEVICE = "devices/%s/messages/events/";
+static const char* TOPIC_DEVICE_DEVICE_MODULE = "devices/%s/modules/%s/messages/events/";
+
+static const char* TOPIC_INPUT_QUEUE_NAME = "devices/%s/modules/%s/#";
+
+static const char* TOPIC_DEVICE_METHOD_SUBSCRIBE = "$iothub/methods/POST/#";
+
+static const char* IOTHUB_API_VERSION = "2017-11-08-preview";
+
+static const char* PROPERTY_SEPARATOR = "&";
+static const char* REPORTED_PROPERTIES_TOPIC = "$iothub/twin/PATCH/properties/reported/?$rid=%"PRIu16;
+static const char* GET_PROPERTIES_TOPIC = "$iothub/twin/GET/?$rid=%"PRIu16;
+static const char* DEVICE_METHOD_RESPONSE_TOPIC = "$iothub/methods/res/%d/?$rid=%s";
+
+static const char* REQUEST_ID_PROPERTY = "?$rid=";
+
+static const char* MESSAGE_ID_PROPERTY = "mid";
+static const char* CORRELATION_ID_PROPERTY = "cid";
+static const char* CONTENT_TYPE_PROPERTY = "ct";
+static const char* CONTENT_ENCODING_PROPERTY = "ce";
+static const char* DIAGNOSTIC_ID_PROPERTY = "diagid";
+static const char* DIAGNOSTIC_CONTEXT_PROPERTY = "diagctx";
+static const char* CONNECTION_DEVICE_ID = "cdid";
+static const char* CONNECTION_MODULE_ID_PROPERTY = "cmid";
+
+
+static const char* DIAGNOSTIC_CONTEXT_CREATION_TIME_UTC_PROPERTY = "creationtimeutc";
+
+#define UNSUBSCRIBE_FROM_TOPIC 0x0000
+#define SUBSCRIBE_GET_REPORTED_STATE_TOPIC 0x0001
+#define SUBSCRIBE_NOTIFICATION_STATE_TOPIC 0x0002
+#define SUBSCRIBE_TELEMETRY_TOPIC 0x0004
+#define SUBSCRIBE_METHODS_TOPIC 0x0008
+#define SUBSCRIBE_DEVICE_METHOD_TOPIC 0x0010
+#define SUBSCRIBE_INPUT_QUEUE_TOPIC 0x0020
+#define SUBSCRIBE_TOPIC_COUNT 5
+
+DEFINE_ENUM_STRINGS(MQTT_CLIENT_EVENT_ERROR, MQTT_CLIENT_EVENT_ERROR_VALUES)
+
+typedef struct SYSTEM_PROPERTY_INFO_TAG
+{
+ const char* propName;
+ size_t propLength;
+} SYSTEM_PROPERTY_INFO;
+
+static SYSTEM_PROPERTY_INFO sysPropList[] = {
+ { "%24.exp", 7 },
+{ "%24.mid", 7 },
+{ "%24.uid", 7 },
+{ "%24.to", 6 },
+{ "%24.cid", 7 },
+{ "%24.ct", 6 },
+{ "%24.ce", 6 },
+{ "devices/", 8 },
+{ "iothub-operation", 16 },
+{ "iothub-ack", 10 },
+{ "%24.on", 6 },
+{ "%24.cdid", 8 },
+{ "%24.cmid", 8 }
+};
+
+static const int slashes_to_reach_input_name = 5;
+
+typedef enum DEVICE_TWIN_MSG_TYPE_TAG
+{
+ REPORTED_STATE,
+ RETRIEVE_PROPERTIES
+} DEVICE_TWIN_MSG_TYPE;
+
+typedef enum MQTT_TRANSPORT_CREDENTIAL_TYPE_TAG
+{
+ CREDENTIAL_NOT_BUILD,
+ X509,
+ SAS_TOKEN_FROM_USER,
+ DEVICE_KEY,
+} MQTT_TRANSPORT_CREDENTIAL_TYPE;
+
+typedef enum MQTT_CLIENT_STATUS_TAG
+{
+ MQTT_CLIENT_STATUS_NOT_CONNECTED,
+ MQTT_CLIENT_STATUS_CONNECTING,
+ MQTT_CLIENT_STATUS_CONNECTED,
+ MQTT_CLIENT_STATUS_PENDING_CLOSE
+} MQTT_CLIENT_STATUS;
+
+typedef struct MQTTTRANSPORT_HANDLE_DATA_TAG
+{
+ // Topic control
+ STRING_HANDLE topic_MqttEvent;
+ STRING_HANDLE topic_MqttMessage;
+ STRING_HANDLE topic_GetState;
+ STRING_HANDLE topic_NotifyState;
+ STRING_HANDLE topic_InputQueue;
+
+ STRING_HANDLE topic_DeviceMethods;
+
+ uint32_t topics_ToSubscribe;
+
+ // Connection related constants
+ STRING_HANDLE hostAddress;
+ STRING_HANDLE device_id;
+ STRING_HANDLE module_id;
+ STRING_HANDLE devicesAndModulesPath;
+ int portNum;
+ bool conn_attempted;
+
+ MQTT_GET_IO_TRANSPORT get_io_transport;
+
+ // The current mqtt iothub implementation requires that the hub name and the domain suffix be passed as the first of a series of segments
+ // passed through the username portion of the connection frame.
+ // The second segment will contain the device id. The two segments are delemited by a "/".
+ // The first segment can be a maximum 256 characters.
+ // The second segment can be a maximum 128 characters.
+ // With the / delimeter you have 384 chars (Plus a terminator of 0).
+ STRING_HANDLE configPassedThroughUsername;
+
+ // Upper layer
+ IOTHUB_CLIENT_CORE_LL_HANDLE llClientHandle;
+
+ // Protocol
+ MQTT_CLIENT_HANDLE mqttClient;
+ XIO_HANDLE xioTransport;
+
+ // Session - connection
+ uint16_t packetId;
+
+ // Connection state control
+ bool isRegistered;
+ MQTT_CLIENT_STATUS mqttClientStatus;
+ bool isDestroyCalled;
+ bool device_twin_get_sent;
+ bool isRecoverableError;
+ uint16_t keepAliveValue;
+ uint16_t connect_timeout_in_sec;
+ tickcounter_ms_t mqtt_connect_time;
+ size_t connectFailCount;
+ tickcounter_ms_t connectTick;
+ bool log_trace;
+ bool raw_trace;
+ TICK_COUNTER_HANDLE msgTickCounter;
+ OPTIONHANDLER_HANDLE saved_tls_options; // Here are the options from the xio layer if any is saved.
+ size_t option_sas_token_lifetime_secs;
+
+ // Internal lists for message tracking
+ PDLIST_ENTRY waitingToSend;
+ DLIST_ENTRY ack_waiting_queue;
+
+ // Message tracking
+ CONTROL_PACKET_TYPE currPacketState;
+
+ // Telemetry specific
+ DLIST_ENTRY telemetry_waitingForAck;
+ bool auto_url_encode_decode;
+
+ // Controls frequency of reconnection logic.
+ RETRY_CONTROL_HANDLE retry_control_handle;
+
+ // Auth module used to generating handle authorization
+ // with either SAS Token, x509 Certs, and Device SAS Token
+ IOTHUB_AUTHORIZATION_HANDLE authorization_module;
+
+ char* http_proxy_hostname;
+ int http_proxy_port;
+ char* http_proxy_username;
+ char* http_proxy_password;
+ bool isProductInfoSet;
+} MQTTTRANSPORT_HANDLE_DATA, *PMQTTTRANSPORT_HANDLE_DATA;
+
+typedef struct MQTT_DEVICE_TWIN_ITEM_TAG
+{
+ tickcounter_ms_t msgPublishTime;
+ size_t retryCount;
+ IOTHUB_IDENTITY_TYPE iothub_type;
+ uint16_t packet_id;
+ uint32_t iothub_msg_id;
+ IOTHUB_DEVICE_TWIN* device_twin_data;
+ DEVICE_TWIN_MSG_TYPE device_twin_msg_type;
+ DLIST_ENTRY entry;
+} MQTT_DEVICE_TWIN_ITEM;
+
+typedef struct MQTT_MESSAGE_DETAILS_LIST_TAG
+{
+ tickcounter_ms_t msgPublishTime;
+ size_t retryCount;
+ IOTHUB_MESSAGE_LIST* iotHubMessageEntry;
+ void* context;
+ uint16_t packet_id;
+ DLIST_ENTRY entry;
+} MQTT_MESSAGE_DETAILS_LIST, *PMQTT_MESSAGE_DETAILS_LIST;
+
+typedef struct DEVICE_METHOD_INFO_TAG
+{
+ STRING_HANDLE request_id;
+} DEVICE_METHOD_INFO;
+
+static void free_proxy_data(MQTTTRANSPORT_HANDLE_DATA* mqtt_transport_instance)
+{
+ if (mqtt_transport_instance->http_proxy_hostname != NULL)
+ {
+ free(mqtt_transport_instance->http_proxy_hostname);
+ mqtt_transport_instance->http_proxy_hostname = NULL;
+ }
+
+ if (mqtt_transport_instance->http_proxy_username != NULL)
+ {
+ free(mqtt_transport_instance->http_proxy_username);
+ mqtt_transport_instance->http_proxy_username = NULL;
+ }
+
+ if (mqtt_transport_instance->http_proxy_password != NULL)
+ {
+ free(mqtt_transport_instance->http_proxy_password);
+ mqtt_transport_instance->http_proxy_password = NULL;
+ }
+}
+
+static void set_saved_tls_options(PMQTTTRANSPORT_HANDLE_DATA transport, OPTIONHANDLER_HANDLE new_options)
+{
+ if (transport->saved_tls_options != NULL)
+ {
+ OptionHandler_Destroy(transport->saved_tls_options);
+ }
+ transport->saved_tls_options = new_options;
+}
+
+static void free_transport_handle_data(MQTTTRANSPORT_HANDLE_DATA* transport_data)
+{
+ if (transport_data->mqttClient != NULL)
+ {
+ mqtt_client_deinit(transport_data->mqttClient);
+ }
+
+ if (transport_data->retry_control_handle != NULL)
+ {
+ retry_control_destroy(transport_data->retry_control_handle);
+ }
+
+ set_saved_tls_options(transport_data, NULL);
+
+ tickcounter_destroy(transport_data->msgTickCounter);
+
+ free_proxy_data(transport_data);
+
+ STRING_delete(transport_data->devicesAndModulesPath);
+ STRING_delete(transport_data->topic_MqttEvent);
+ STRING_delete(transport_data->topic_MqttMessage);
+ STRING_delete(transport_data->device_id);
+ STRING_delete(transport_data->module_id);
+ STRING_delete(transport_data->hostAddress);
+ STRING_delete(transport_data->configPassedThroughUsername);
+ STRING_delete(transport_data->topic_GetState);
+ STRING_delete(transport_data->topic_NotifyState);
+ STRING_delete(transport_data->topic_DeviceMethods);
+ STRING_delete(transport_data->topic_InputQueue);
+
+ free(transport_data);
+}
+
+int IoTHubTransport_MQTT_Common_SetRetryPolicy(TRANSPORT_LL_HANDLE handle, IOTHUB_CLIENT_RETRY_POLICY retryPolicy, size_t retryTimeoutLimitInSeconds)
+{
+ int result;
+
+ if (handle == NULL)
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_25_041: [**If any handle is NULL then IoTHubTransport_MQTT_Common_SetRetryPolicy shall return resultant line.] */
+ LogError("Invalid handle parameter. NULL.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ RETRY_CONTROL_HANDLE new_retry_control_handle;
+
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_006: [ IoTHubTransport_MQTT_Common_SetRetryPolicy shall set the retry logic by calling retry_control_create() with retry policy and retryTimeout as parameters]
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_009: [ If retry_control_create() fails then IoTHubTransport_MQTT_Common_SetRetryPolicy shall revert to previous retry policy and return non-zero value ]
+ if ((new_retry_control_handle = retry_control_create(retryPolicy, (unsigned int)retryTimeoutLimitInSeconds)) == NULL)
+ {
+ LogError("Failed creating new retry control handle");
+ result = __FAILURE__;
+ }
+ else
+ {
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ RETRY_CONTROL_HANDLE previous_retry_control_handle = transport_data->retry_control_handle;
+
+ transport_data->retry_control_handle = new_retry_control_handle;
+ retry_control_destroy(previous_retry_control_handle);
+
+ /*Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_25_045: [**If retry logic for specified parameters of retry policy and retryTimeoutLimitInSeconds is created successfully then IoTHubTransport_MQTT_Common_SetRetryPolicy shall return 0]*/
+ result = 0;
+ }
+ }
+
+ return result;
+}
+
+static uint16_t get_next_packet_id(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ if (transport_data->packetId + 1 >= USHRT_MAX)
+ {
+ transport_data->packetId = 1;
+ }
+ else
+ {
+ transport_data->packetId++;
+ }
+ return transport_data->packetId;
+}
+
+static const char* retrieve_mqtt_return_codes(CONNECT_RETURN_CODE rtn_code)
+{
+ switch (rtn_code)
+ {
+ case CONNECTION_ACCEPTED:
+ return "Accepted";
+ case CONN_REFUSED_UNACCEPTABLE_VERSION:
+ return "Unacceptable Version";
+ case CONN_REFUSED_ID_REJECTED:
+ return "Id Rejected";
+ case CONN_REFUSED_SERVER_UNAVAIL:
+ return "Server Unavailable";
+ case CONN_REFUSED_BAD_USERNAME_PASSWORD:
+ return "Bad Username/Password";
+ case CONN_REFUSED_NOT_AUTHORIZED:
+ return "Not Authorized";
+ case CONN_REFUSED_UNKNOWN:
+ default:
+ return "Unknown";
+ }
+}
+
+static int retrieve_device_method_rid_info(const char* resp_topic, STRING_HANDLE method_name, STRING_HANDLE request_id)
+{
+ int result;
+ STRING_TOKENIZER_HANDLE token_handle = STRING_TOKENIZER_create_from_char(resp_topic);
+ if (token_handle == NULL)
+ {
+ LogError("Failed creating token from device twin topic.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ STRING_HANDLE token_value;
+ if ((token_value = STRING_new()) == NULL)
+ {
+ LogError("Failed allocating new string .");
+ result = __FAILURE__;
+ }
+ else
+ {
+ size_t token_index = 0;
+ size_t request_id_length = strlen(REQUEST_ID_PROPERTY);
+ result = __FAILURE__;
+ while (STRING_TOKENIZER_get_next_token(token_handle, token_value, "/") == 0)
+ {
+ if (token_index == 3)
+ {
+ if (STRING_concat_with_STRING(method_name, token_value) != 0)
+ {
+ LogError("Failed STRING_concat_with_STRING.");
+ result = __FAILURE__;
+ break;
+ }
+ }
+ else if (token_index == 4)
+ {
+ if (STRING_length(token_value) >= request_id_length)
+ {
+ const char* request_id_value = STRING_c_str(token_value);
+ if (memcmp(request_id_value, REQUEST_ID_PROPERTY, request_id_length) == 0)
+ {
+ if (STRING_concat(request_id, request_id_value + request_id_length) != 0)
+ {
+ LogError("Failed STRING_concat failed.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ result = 0;
+ }
+ break;
+ }
+ }
+ }
+ token_index++;
+ }
+ STRING_delete(token_value);
+ }
+ STRING_TOKENIZER_destroy(token_handle);
+ }
+ return result;
+}
+
+static int parse_device_twin_topic_info(const char* resp_topic, bool* patch_msg, size_t* request_id, int* status_code)
+{
+ int result;
+ STRING_TOKENIZER_HANDLE token_handle = STRING_TOKENIZER_create_from_char(resp_topic);
+ if (token_handle == NULL)
+ {
+ LogError("Failed creating token from device twin topic.");
+ result = __FAILURE__;
+ *status_code = 0;
+ *request_id = 0;
+ *patch_msg = false;
+ }
+ else
+ {
+ STRING_HANDLE token_value;
+ if ((token_value = STRING_new()) == NULL)
+ {
+ LogError("Failed allocating new string .");
+ result = __FAILURE__;
+ *status_code = 0;
+ *request_id = 0;
+ *patch_msg = false;
+ }
+ else
+ {
+ result = __FAILURE__;
+ size_t token_count = 0;
+ while (STRING_TOKENIZER_get_next_token(token_handle, token_value, "/") == 0)
+ {
+ if (token_count == 2)
+ {
+ if (strcmp(STRING_c_str(token_value), "PATCH") == 0)
+ {
+ *patch_msg = true;
+ *status_code = 0;
+ *request_id = 0;
+ result = 0;
+ break;
+ }
+ else
+ {
+ *patch_msg = false;
+ }
+ }
+ else if (token_count == 3)
+ {
+ *status_code = (int)atol(STRING_c_str(token_value));
+ if (STRING_TOKENIZER_get_next_token(token_handle, token_value, "/?$rid=") == 0)
+ {
+ *request_id = (size_t)atol(STRING_c_str(token_value));
+ }
+ *patch_msg = false;
+ result = 0;
+ break;
+ }
+ token_count++;
+ }
+ STRING_delete(token_value);
+ }
+ STRING_TOKENIZER_destroy(token_handle);
+ }
+ return result;
+}
+
+#define TOLOWER(c) (((c>='A') && (c<='Z'))?c-'A'+'a':c)
+static int InternStrnicmp(const char* s1, const char* s2, size_t n)
+{
+ int result;
+
+ if (s1 == NULL) result = -1;
+ else if (s2 == NULL) result = 1;
+ else
+ {
+ result = 0;
+
+ while (n-- && result == 0)
+ {
+ if (*s1 == 0) result = -1;
+ else if (*s2 == 0) result = 1;
+ else
+ {
+
+ result = TOLOWER(*s1) - TOLOWER(*s2);
+ ++s1;
+ ++s2;
+ }
+ }
+ }
+
+ return result;
+}
+
+
+static IOTHUB_IDENTITY_TYPE retrieve_topic_type(const char* topic_resp, const char* input_queue)
+{
+ IOTHUB_IDENTITY_TYPE type;
+ if (InternStrnicmp(topic_resp, TOPIC_DEVICE_TWIN_PREFIX, sizeof(TOPIC_DEVICE_TWIN_PREFIX) - 1) == 0)
+ {
+ type = IOTHUB_TYPE_DEVICE_TWIN;
+ }
+ else if (InternStrnicmp(topic_resp, TOPIC_DEVICE_METHOD_PREFIX, sizeof(TOPIC_DEVICE_METHOD_PREFIX) - 1) == 0)
+ {
+ type = IOTHUB_TYPE_DEVICE_METHODS;
+ }
+ // input_queue contains additional "#" from subscribe, which we strip off on comparing incoming.
+ else if ((input_queue != NULL) && InternStrnicmp(topic_resp, input_queue, strlen(input_queue) - 1) == 0)
+ {
+ type = IOTHUB_TYPE_EVENT_QUEUE;
+ }
+ else
+ {
+ type = IOTHUB_TYPE_TELEMETRY;
+ }
+ return type;
+
+}
+
+static void sendMsgComplete(IOTHUB_MESSAGE_LIST* iothubMsgList, PMQTTTRANSPORT_HANDLE_DATA transport_data, IOTHUB_CLIENT_CONFIRMATION_RESULT confirmResult)
+{
+ DLIST_ENTRY messageCompleted;
+ DList_InitializeListHead(&messageCompleted);
+ DList_InsertTailList(&messageCompleted, &(iothubMsgList->entry));
+ IoTHubClientCore_LL_SendComplete(transport_data->llClientHandle, &messageCompleted, confirmResult);
+}
+
+static int addUserPropertiesTouMqttMessage(IOTHUB_MESSAGE_HANDLE iothub_message_handle, STRING_HANDLE topic_string, size_t* index_ptr, bool urlencode)
+{
+ int result = 0;
+ const char* const* propertyKeys;
+ const char* const* propertyValues;
+ size_t propertyCount;
+ size_t index = *index_ptr;
+ MAP_HANDLE properties_map = IoTHubMessage_Properties(iothub_message_handle);
+ if (properties_map != NULL)
+ {
+ if (Map_GetInternals(properties_map, &propertyKeys, &propertyValues, &propertyCount) != MAP_OK)
+ {
+ LogError("Failed to get the internals of the property map.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (propertyCount != 0)
+ {
+ for (index = 0; index < propertyCount && result == 0; index++)
+ {
+ if (urlencode)
+ {
+ STRING_HANDLE property_key = URL_EncodeString(propertyKeys[index]);
+ STRING_HANDLE property_value = URL_EncodeString(propertyValues[index]);
+ if ((property_key == NULL) || (property_value == NULL))
+ {
+ LogError("Failed URL Encoding properties");
+ result = __FAILURE__;
+ }
+ else if (STRING_sprintf(topic_string, "%s=%s%s", STRING_c_str(property_key), STRING_c_str(property_value), propertyCount - 1 == index ? "" : PROPERTY_SEPARATOR) != 0)
+ {
+ LogError("Failed constructing property string.");
+ result = __FAILURE__;
+ }
+ STRING_delete(property_key);
+ STRING_delete(property_value);
+ }
+ else
+ {
+ if (STRING_sprintf(topic_string, "%s=%s%s", propertyKeys[index], propertyValues[index], propertyCount - 1 == index ? "" : PROPERTY_SEPARATOR) != 0)
+ {
+ LogError("Failed constructing property string.");
+ result = __FAILURE__;
+ }
+ }
+ }
+ }
+ }
+ }
+ *index_ptr = index;
+ return result;
+}
+
+static int addSystemPropertyToTopicString(STRING_HANDLE topic_string, size_t index, const char* property_key, const char* property_value, bool urlencode)
+{
+ int result = 0;
+
+ if (urlencode)
+ {
+ STRING_HANDLE encoded_property_value = URL_EncodeString(property_value);
+ if (encoded_property_value == NULL)
+ {
+ LogError("Failed URL encoding %s.", property_key);
+ result = __FAILURE__;
+ }
+ else if (STRING_sprintf(topic_string, "%s%%24.%s=%s", index == 0 ? "" : PROPERTY_SEPARATOR, property_key, STRING_c_str(encoded_property_value)) != 0)
+ {
+ LogError("Failed setting %s.", property_key);
+ result = __FAILURE__;
+ }
+ STRING_delete(encoded_property_value);
+ }
+ else
+ {
+ if (STRING_sprintf(topic_string, "%s%%24.%s=%s", index == 0 ? "" : PROPERTY_SEPARATOR, property_key, property_value) != 0)
+ {
+ LogError("Failed setting %s.", property_key);
+ result = __FAILURE__;
+ }
+ }
+ return result;
+}
+
+static int addSystemPropertiesTouMqttMessage(IOTHUB_MESSAGE_HANDLE iothub_message_handle, STRING_HANDLE topic_string, size_t* index_ptr, bool urlencode)
+{
+ (void)urlencode;
+ int result = 0;
+ size_t index = *index_ptr;
+
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_052: [ IoTHubTransport_MQTT_Common_DoWork shall check for the CorrelationId property and if found add the value as a system property in the format of $.cid=<id> ] */
+ const char* correlation_id = IoTHubMessage_GetCorrelationId(iothub_message_handle);
+ if (correlation_id != NULL)
+ {
+ result = addSystemPropertyToTopicString(topic_string, index, CORRELATION_ID_PROPERTY, correlation_id, urlencode);
+ index++;
+ }
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_053: [ IoTHubTransport_MQTT_Common_DoWork shall check for the MessageId property and if found add the value as a system property in the format of $.mid=<id> ] */
+ if (result == 0)
+ {
+ const char* msg_id = IoTHubMessage_GetMessageId(iothub_message_handle);
+ if (msg_id != NULL)
+ {
+ result = addSystemPropertyToTopicString(topic_string, index, MESSAGE_ID_PROPERTY, msg_id, urlencode);
+ index++;
+ }
+ }
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_010: [ `IoTHubTransport_MQTT_Common_DoWork` shall check for the ContentType property and if found add the `value` as a system property in the format of `$.ct=<value>` ]
+ if (result == 0)
+ {
+ const char* content_type = IoTHubMessage_GetContentTypeSystemProperty(iothub_message_handle);
+ if (content_type != NULL)
+ {
+ result = addSystemPropertyToTopicString(topic_string, index, CONTENT_TYPE_PROPERTY, content_type, urlencode);
+ index++;
+ }
+ }
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_011: [ `IoTHubTransport_MQTT_Common_DoWork` shall check for the ContentEncoding property and if found add the `value` as a system property in the format of `$.ce=<value>` ]
+ if (result == 0)
+ {
+ const char* content_encoding = IoTHubMessage_GetContentEncodingSystemProperty(iothub_message_handle);
+ if (content_encoding != NULL)
+ {
+ result = addSystemPropertyToTopicString(topic_string, index, CONTENT_ENCODING_PROPERTY, content_encoding, urlencode);
+ index++;
+ }
+ }
+ *index_ptr = index;
+ return result;
+}
+
+static int addDiagnosticPropertiesTouMqttMessage(IOTHUB_MESSAGE_HANDLE iothub_message_handle, STRING_HANDLE topic_string, size_t* index_ptr)
+{
+ int result = 0;
+ size_t index = *index_ptr;
+
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_014: [ `IoTHubTransport_MQTT_Common_DoWork` shall check for the diagnostic properties including diagid and diagCreationTimeUtc and if found both add them as system property in the format of `$.diagid` and `$.diagctx` respectively]
+ const IOTHUB_MESSAGE_DIAGNOSTIC_PROPERTY_DATA* diagnosticData = IoTHubMessage_GetDiagnosticPropertyData(iothub_message_handle);
+ if (diagnosticData != NULL)
+ {
+ const char* diag_id = diagnosticData->diagnosticId;
+ const char* creation_time_utc = diagnosticData->diagnosticCreationTimeUtc;
+ //diagid and creationtimeutc must be present/unpresent simultaneously
+ if (diag_id != NULL && creation_time_utc != NULL)
+ {
+ if (STRING_sprintf(topic_string, "%s%%24.%s=%s", index == 0 ? "" : PROPERTY_SEPARATOR, DIAGNOSTIC_ID_PROPERTY, diag_id) != 0)
+ {
+ LogError("Failed setting diagnostic id");
+ result = __FAILURE__;
+ }
+ index++;
+
+ if (result == 0)
+ {
+ //construct diagnostic context, it should be urlencode(key1=value1,key2=value2)
+ STRING_HANDLE diagContextHandle = STRING_construct_sprintf("%s=%s", DIAGNOSTIC_CONTEXT_CREATION_TIME_UTC_PROPERTY, creation_time_utc);
+ if (diagContextHandle == NULL)
+ {
+ LogError("Failed constructing diagnostic context");
+ result = __FAILURE__;
+ }
+ else
+ {
+ //Add other diagnostic context properties here if have more
+ STRING_HANDLE encodedContextValueHandle = URL_Encode(diagContextHandle);
+ const char* encodedContextValueString = NULL;
+ if (encodedContextValueHandle != NULL &&
+ (encodedContextValueString = STRING_c_str(encodedContextValueHandle)) != NULL)
+ {
+ if (STRING_sprintf(topic_string, "%s%%24.%s=%s", index == 0 ? "" : PROPERTY_SEPARATOR, DIAGNOSTIC_CONTEXT_PROPERTY, encodedContextValueString) != 0)
+ {
+ LogError("Failed setting diagnostic context");
+ result = __FAILURE__;
+ }
+ STRING_delete(encodedContextValueHandle);
+ encodedContextValueHandle = NULL;
+ }
+ else
+ {
+ LogError("Failed encoding diagnostic context value");
+ result = __FAILURE__;
+ }
+ STRING_delete(diagContextHandle);
+ diagContextHandle = NULL;
+ index++;
+ }
+ }
+ }
+ else if (diag_id != NULL || creation_time_utc != NULL)
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_015: [ `IoTHubTransport_MQTT_Common_DoWork` shall check whether diagid and diagCreationTimeUtc be present simultaneously, treat as error if not]
+ LogError("diagid and diagcreationtimeutc must be present simultaneously.");
+ result = __FAILURE__;
+ }
+ }
+ return result;
+}
+
+
+static STRING_HANDLE addPropertiesTouMqttMessage(IOTHUB_MESSAGE_HANDLE iothub_message_handle, const char* eventTopic, bool urlencode)
+{
+ size_t index = 0;
+ STRING_HANDLE result = STRING_construct(eventTopic);
+ if (result == NULL)
+ {
+ LogError("Failed to create event topic string handle");
+ }
+ else if (addUserPropertiesTouMqttMessage(iothub_message_handle, result, &index, urlencode) != 0)
+ {
+ LogError("Failed adding Properties to uMQTT Message");
+ STRING_delete(result);
+ result = NULL;
+ }
+ else if (addSystemPropertiesTouMqttMessage(iothub_message_handle, result, &index, urlencode) != 0)
+ {
+ LogError("Failed adding System Properties to uMQTT Message");
+ STRING_delete(result);
+ result = NULL;
+ }
+ else if (addDiagnosticPropertiesTouMqttMessage(iothub_message_handle, result, &index) != 0)
+ {
+ LogError("Failed adding Diagnostic Properties to uMQTT Message");
+ STRING_delete(result);
+ result = NULL;
+ }
+
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_060: [ `IoTHubTransport_MQTT_Common_DoWork` shall check for the OutputName property and if found add the alue as a system property in the format of $.on=<value> ]
+ if (result != NULL)
+ {
+ const char* output_name = IoTHubMessage_GetOutputName(iothub_message_handle);
+ if (output_name != NULL)
+ {
+ if (STRING_sprintf(result, "%s%%24.on=%s/", index == 0 ? "" : PROPERTY_SEPARATOR, output_name) != 0)
+ {
+ LogError("Failed setting output name.");
+ STRING_delete(result);
+ result = NULL;
+ }
+ index++;
+ }
+ }
+
+ return result;
+}
+
+static int publish_mqtt_telemetry_msg(PMQTTTRANSPORT_HANDLE_DATA transport_data, MQTT_MESSAGE_DETAILS_LIST* mqttMsgEntry, const unsigned char* payload, size_t len)
+{
+ int result;
+ STRING_HANDLE msgTopic = addPropertiesTouMqttMessage(mqttMsgEntry->iotHubMessageEntry->messageHandle, STRING_c_str(transport_data->topic_MqttEvent), transport_data->auto_url_encode_decode);
+ if (msgTopic == NULL)
+ {
+ LogError("Failed adding properties to mqtt message");
+ result = __FAILURE__;
+ }
+ else
+ {
+ MQTT_MESSAGE_HANDLE mqttMsg = mqttmessage_create(mqttMsgEntry->packet_id, STRING_c_str(msgTopic), DELIVER_AT_LEAST_ONCE, payload, len);
+ if (mqttMsg == NULL)
+ {
+ LogError("Failed creating mqtt message");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (tickcounter_get_current_ms(transport_data->msgTickCounter, &mqttMsgEntry->msgPublishTime) != 0)
+ {
+ LogError("Failed retrieving tickcounter info");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (mqtt_client_publish(transport_data->mqttClient, mqttMsg) != 0)
+ {
+ LogError("Failed attempting to publish mqtt message");
+ result = __FAILURE__;
+ }
+ else
+ {
+ mqttMsgEntry->retryCount++;
+ result = 0;
+ }
+ }
+ mqttmessage_destroy(mqttMsg);
+ }
+ STRING_delete(msgTopic);
+ }
+ return result;
+}
+
+static int publish_device_method_message(MQTTTRANSPORT_HANDLE_DATA* transport_data, int status_code, STRING_HANDLE request_id, const unsigned char* response, size_t response_size)
+{
+ int result;
+ uint16_t packet_id = get_next_packet_id(transport_data);
+
+ STRING_HANDLE msg_topic = STRING_construct_sprintf(DEVICE_METHOD_RESPONSE_TOPIC, status_code, STRING_c_str(request_id));
+ if (msg_topic == NULL)
+ {
+ LogError("Failed constructing message topic.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ MQTT_MESSAGE_HANDLE mqtt_get_msg = mqttmessage_create(packet_id, STRING_c_str(msg_topic), DELIVER_AT_MOST_ONCE, response, response_size);
+ if (mqtt_get_msg == NULL)
+ {
+ LogError("Failed constructing mqtt message.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (mqtt_client_publish(transport_data->mqttClient, mqtt_get_msg) != 0)
+ {
+ LogError("Failed publishing to mqtt client.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ result = 0;
+ }
+ mqttmessage_destroy(mqtt_get_msg);
+ }
+ STRING_delete(msg_topic);
+ }
+ return result;
+}
+
+static int publish_device_twin_get_message(MQTTTRANSPORT_HANDLE_DATA* transport_data)
+{
+ int result;
+ MQTT_DEVICE_TWIN_ITEM* mqtt_info = (MQTT_DEVICE_TWIN_ITEM*)malloc(sizeof(MQTT_DEVICE_TWIN_ITEM));
+ if (mqtt_info == NULL)
+ {
+ LogError("Failed allocating device twin data.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ mqtt_info->packet_id = get_next_packet_id(transport_data);
+ mqtt_info->iothub_msg_id = 0;
+ mqtt_info->device_twin_msg_type = RETRIEVE_PROPERTIES;
+ mqtt_info->retryCount = 0;
+ mqtt_info->msgPublishTime = 0;
+ mqtt_info->iothub_type = IOTHUB_TYPE_DEVICE_TWIN;
+ mqtt_info->device_twin_data = NULL;
+ STRING_HANDLE msg_topic = STRING_construct_sprintf(GET_PROPERTIES_TOPIC, mqtt_info->packet_id);
+ if (msg_topic == NULL)
+ {
+ LogError("Failed constructing get Prop topic.");
+ free(mqtt_info);
+ result = __FAILURE__;
+ }
+ else
+ {
+ MQTT_MESSAGE_HANDLE mqtt_get_msg = mqttmessage_create(mqtt_info->packet_id, STRING_c_str(msg_topic), DELIVER_AT_MOST_ONCE, NULL, 0);
+ if (mqtt_get_msg == NULL)
+ {
+ LogError("Failed constructing mqtt message.");
+ free(mqtt_info);
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (mqtt_client_publish(transport_data->mqttClient, mqtt_get_msg) != 0)
+ {
+ LogError("Failed publishing to mqtt client.");
+ free(mqtt_info);
+ result = __FAILURE__;
+ }
+ else
+ {
+ DList_InsertTailList(&transport_data->ack_waiting_queue, &mqtt_info->entry);
+ result = 0;
+ }
+ mqttmessage_destroy(mqtt_get_msg);
+ }
+ STRING_delete(msg_topic);
+ }
+ }
+ return result;
+}
+
+static int publish_device_twin_message(MQTTTRANSPORT_HANDLE_DATA* transport_data, IOTHUB_DEVICE_TWIN* device_twin_info, MQTT_DEVICE_TWIN_ITEM* mqtt_info)
+{
+ int result;
+ mqtt_info->packet_id = get_next_packet_id(transport_data);
+ mqtt_info->device_twin_msg_type = REPORTED_STATE;
+ STRING_HANDLE msgTopic = STRING_construct_sprintf(REPORTED_PROPERTIES_TOPIC, mqtt_info->packet_id);
+ if (msgTopic == NULL)
+ {
+ LogError("Failed constructing reported prop topic.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ const CONSTBUFFER* data_buff = CONSTBUFFER_GetContent(device_twin_info->report_data_handle);
+ MQTT_MESSAGE_HANDLE mqtt_rpt_msg = mqttmessage_create(mqtt_info->packet_id, STRING_c_str(msgTopic), DELIVER_AT_MOST_ONCE, data_buff->buffer, data_buff->size);
+ if (mqtt_rpt_msg == NULL)
+ {
+ LogError("Failed creating mqtt message");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (tickcounter_get_current_ms(transport_data->msgTickCounter, &mqtt_info->msgPublishTime) != 0)
+ {
+ LogError("Failed retrieving tickcounter info");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (mqtt_client_publish(transport_data->mqttClient, mqtt_rpt_msg) != 0)
+ {
+ LogError("Failed publishing mqtt message");
+ result = __FAILURE__;
+ }
+ else
+ {
+ mqtt_info->retryCount++;
+ result = 0;
+ }
+ }
+ mqttmessage_destroy(mqtt_rpt_msg);
+ }
+ STRING_delete(msgTopic);
+ }
+ return result;
+}
+
+static void changeStateToSubscribeIfAllowed(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ if (transport_data->currPacketState != CONNACK_TYPE &&
+ transport_data->currPacketState != CONNECT_TYPE &&
+ transport_data->currPacketState != DISCONNECT_TYPE &&
+ transport_data->currPacketState != PACKET_TYPE_ERROR)
+ {
+ transport_data->currPacketState = SUBSCRIBE_TYPE;
+ }
+}
+
+static int subscribeToNotifyStateIfNeeded(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ int result;
+
+ if (transport_data->topic_NotifyState == NULL)
+ {
+ transport_data->topic_NotifyState = STRING_construct(TOPIC_NOTIFICATION_STATE);
+ if (transport_data->topic_NotifyState == NULL)
+ {
+ LogError("Failure: unable constructing notify state topic");
+ result = __FAILURE__;
+ }
+ else
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_NOTIFICATION_STATE_TOPIC;
+ result = 0;
+ }
+ }
+ else
+ {
+ result = 0;
+ }
+
+ if (result == 0)
+ {
+ changeStateToSubscribeIfAllowed(transport_data);
+ }
+
+ return result;
+}
+
+
+static bool isSystemProperty(const char* tokenData)
+{
+ bool result = false;
+ size_t propCount = sizeof(sysPropList) / sizeof(sysPropList[0]);
+ size_t index = 0;
+ for (index = 0; index < propCount; index++)
+ {
+ if (memcmp(tokenData, sysPropList[index].propName, sysPropList[index].propLength) == 0)
+ {
+ result = true;
+ break;
+ }
+ }
+ return result;
+}
+
+// Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_061: [ If the message is sent to an input queue, `IoTHubTransport_MQTT_Common_DoWork` shall parse out to the input queue name and store it in the message with IoTHubMessage_SetInputName ]
+// Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_062: [ If IoTHubTransport_MQTT_Common_DoWork receives a malformatted inputQueue, it shall fail ]
+static int addInputNamePropertyToMessage(IOTHUB_MESSAGE_HANDLE IoTHubMessage, const char* topic_name)
+{
+ int result = __FAILURE__;
+ int number_tokens_read = 0;
+
+ STRING_TOKENIZER_HANDLE token_handle = STRING_TOKENIZER_create_from_char(topic_name);
+ if (token_handle == NULL)
+ {
+ LogError("STRING_TOKENIZER_create_from_char failed\n");
+ result = __FAILURE__;
+ }
+ else
+ {
+ STRING_HANDLE token_value;
+ if ((token_value = STRING_new()) == NULL)
+ {
+ LogError("Failed allocating token_value");
+ }
+ else
+ {
+ while (STRING_TOKENIZER_get_next_token(token_handle, token_value, "/") == 0)
+ {
+ number_tokens_read++;
+ if (number_tokens_read == (slashes_to_reach_input_name + 1))
+ {
+ if ((IOTHUB_MESSAGE_OK != IoTHubMessage_SetInputName(IoTHubMessage, STRING_c_str(token_value))))
+ {
+ LogError("Failed adding input name to msg");
+ result = __FAILURE__;
+ }
+ else
+ {
+ result = 0;
+ }
+ break;
+ }
+ }
+ }
+ STRING_delete(token_value);
+
+ if (number_tokens_read != (slashes_to_reach_input_name + 1))
+ {
+ LogError("Not enough '/' to contain input name. Got %d, need at least %d", number_tokens_read, (slashes_to_reach_input_name + 1));
+ result = __FAILURE__;
+ }
+ STRING_TOKENIZER_destroy(token_handle);
+ }
+
+ return result;
+}
+
+static int setMqttMessagePropertyIfPossible(IOTHUB_MESSAGE_HANDLE IoTHubMessage, const char* propName, const char* propValue, size_t nameLen)
+{
+ // Not finding a system property to map to isn't an error.
+ int result = 0;
+
+ if (nameLen > 4)
+ {
+ if (strcmp((const char*)&propName[nameLen - 4], CONNECTION_DEVICE_ID) == 0)
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_063: [ If type is IOTHUB_TYPE_TELEMETRY and the system property `$.cdid` is defined, its value shall be set on the IOTHUB_MESSAGE_HANDLE's ConnectionDeviceId property ]
+ if (IoTHubMessage_SetConnectionDeviceId(IoTHubMessage, propValue) != IOTHUB_MESSAGE_OK)
+ {
+ LogError("Failed to set IOTHUB_MESSAGE_HANDLE 'messageId' property.");
+ result = __FAILURE__;
+ }
+ return result;
+ }
+ if (strcmp((const char*)&propName[nameLen - 4], CONNECTION_MODULE_ID_PROPERTY) == 0)
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_064: [ If type is IOTHUB_TYPE_TELEMETRY and the system property `$.cmid` is defined, its value shall be set on the IOTHUB_MESSAGE_HANDLE's ConnectionModuleId property ]
+ if (IoTHubMessage_SetConnectionModuleId(IoTHubMessage, propValue) != IOTHUB_MESSAGE_OK)
+ {
+ LogError("Failed to set IOTHUB_MESSAGE_HANDLE 'correlationId' property.");
+ result = __FAILURE__;
+ }
+ return result;
+ }
+ }
+ if (nameLen > 3)
+ {
+ if (strcmp((const char*)&propName[nameLen - 3], MESSAGE_ID_PROPERTY) == 0)
+ {
+ if (IoTHubMessage_SetMessageId(IoTHubMessage, propValue) != IOTHUB_MESSAGE_OK)
+ {
+ LogError("Failed to set IOTHUB_MESSAGE_HANDLE 'messageId' property.");
+ result = __FAILURE__;
+ }
+ return result;
+ }
+ else if (strcmp((const char*)&propName[nameLen - 3], CORRELATION_ID_PROPERTY) == 0)
+ {
+ if (IoTHubMessage_SetCorrelationId(IoTHubMessage, propValue) != IOTHUB_MESSAGE_OK)
+ {
+ LogError("Failed to set IOTHUB_MESSAGE_HANDLE 'correlationId' property.");
+ result = __FAILURE__;
+ }
+ return result;
+ }
+ }
+
+ if (nameLen > 2)
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_012: [ If type is IOTHUB_TYPE_TELEMETRY and the system property `$.ct` is defined, its value shall be set on the IOTHUB_MESSAGE_HANDLE's ContentType property ]
+ if (strcmp((const char*)&propName[nameLen - 2], CONTENT_TYPE_PROPERTY) == 0)
+ {
+ if (IoTHubMessage_SetContentTypeSystemProperty(IoTHubMessage, propValue) != IOTHUB_MESSAGE_OK)
+ {
+ LogError("Failed to set IOTHUB_MESSAGE_HANDLE 'customContentType' property.");
+ result = __FAILURE__;
+ }
+ return result;
+ }
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_013: [ If type is IOTHUB_TYPE_TELEMETRY and the system property `$.ce` is defined, its value shall be set on the IOTHUB_MESSAGE_HANDLE's ContentEncoding property ]
+ else if (strcmp((const char*)&propName[nameLen - 2], CONTENT_ENCODING_PROPERTY) == 0)
+ {
+ if (IoTHubMessage_SetContentEncodingSystemProperty(IoTHubMessage, propValue) != IOTHUB_MESSAGE_OK)
+ {
+ LogError("Failed to set IOTHUB_MESSAGE_HANDLE 'contentEncoding' property.");
+ result = __FAILURE__;
+ }
+ return result;
+ }
+ }
+
+ return result;
+}
+
+static int extractMqttProperties(IOTHUB_MESSAGE_HANDLE IoTHubMessage, const char* topic_name, bool urldecode)
+{
+ int result;
+ STRING_HANDLE mqttTopic = STRING_construct(topic_name);
+ if (mqttTopic == NULL)
+ {
+ LogError("Failure constructing string topic name.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ STRING_TOKENIZER_HANDLE token = STRING_TOKENIZER_create(mqttTopic);
+ if (token != NULL)
+ {
+ MAP_HANDLE propertyMap = IoTHubMessage_Properties(IoTHubMessage);
+ if (propertyMap == NULL)
+ {
+ LogError("Failure to retrieve IoTHubMessage_properties.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ STRING_HANDLE output = STRING_new();
+ if (output == NULL)
+ {
+ LogError("Failure to allocate STRING_new.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ result = 0;
+
+ while (STRING_TOKENIZER_get_next_token(token, output, PROPERTY_SEPARATOR) == 0 && result == 0)
+ {
+ const char* tokenData = STRING_c_str(output);
+ size_t tokenLen = strlen(tokenData);
+ if (tokenData == NULL || tokenLen == 0)
+ {
+ break;
+ }
+ else
+ {
+ if (isSystemProperty(tokenData))
+ {
+ const char* iterator = tokenData;
+ while (iterator != NULL && *iterator != '\0' && result == 0)
+ {
+ if (*iterator == '=')
+ {
+ size_t nameLen = iterator - tokenData;
+ char* propName = malloc(nameLen + 1);
+
+ size_t valLen = tokenLen - (nameLen + 1) + 1;
+ char* propValue = malloc(valLen + 1);
+
+ if (propName == NULL || propValue == NULL)
+ {
+ LogError("Failed allocating property name (%p) and/or value (%p)", propName, propValue);
+ result = __FAILURE__;
+ }
+ else
+ {
+ strncpy(propName, tokenData, nameLen);
+ propName[nameLen] = '\0';
+
+ strncpy(propValue, iterator + 1, valLen);
+ propValue[valLen] = '\0';
+
+ if (urldecode)
+ {
+ STRING_HANDLE propValue_decoded;
+ if ((propValue_decoded = URL_DecodeString(propValue)) == NULL)
+ {
+ LogError("Failed to URL decode property value");
+ result = __FAILURE__;
+ }
+ else if (setMqttMessagePropertyIfPossible(IoTHubMessage, propName, STRING_c_str(propValue_decoded), nameLen) != 0)
+ {
+ LogError("Unable to set message property");
+ result = __FAILURE__;
+ }
+ STRING_delete(propValue_decoded);
+ }
+ else
+ {
+ if (setMqttMessagePropertyIfPossible(IoTHubMessage, propName, propValue, nameLen) != 0)
+ {
+ LogError("Unable to set message property");
+ result = __FAILURE__;
+ }
+ }
+ }
+ free(propName);
+ free(propValue);
+
+ break;
+ }
+ iterator++;
+ }
+ }
+ else //User Properties
+ {
+ const char* iterator = tokenData;
+ while (iterator != NULL && *iterator != '\0' && result == 0)
+ {
+ if (*iterator == '=')
+ {
+ size_t nameLen = iterator - tokenData;
+ char* propName = malloc(nameLen + 1);
+
+ size_t valLen = tokenLen - (nameLen + 1) + 1;
+ char* propValue = malloc(valLen + 1);
+
+ if (propName == NULL || propValue == NULL)
+ {
+ result = __FAILURE__;
+ }
+ else
+ {
+ strncpy(propName, tokenData, nameLen);
+ propName[nameLen] = '\0';
+
+ strncpy(propValue, iterator + 1, valLen);
+ propValue[valLen] = '\0';
+
+ if (urldecode)
+ {
+ STRING_HANDLE propName_decoded = URL_DecodeString(propName);
+ STRING_HANDLE propValue_decoded = URL_DecodeString(propValue);
+ if (propName_decoded == NULL || propValue_decoded == NULL)
+ {
+ LogError("Failed to URL decode property");
+ result = __FAILURE__;
+ }
+ else if (Map_AddOrUpdate(propertyMap, STRING_c_str(propName_decoded), STRING_c_str(propValue_decoded)) != MAP_OK)
+ {
+ LogError("Map_AddOrUpdate failed.");
+ result = __FAILURE__;
+ }
+ STRING_delete(propName_decoded);
+ STRING_delete(propValue_decoded);
+ }
+ else
+ {
+ if (Map_AddOrUpdate(propertyMap, propName, propValue) != MAP_OK)
+ {
+ LogError("Map_AddOrUpdate failed.");
+ result = __FAILURE__;
+ }
+ }
+ }
+ free(propName);
+ free(propValue);
+
+ break;
+ }
+ iterator++;
+ }
+ }
+ }
+ }
+ STRING_delete(output);
+ }
+ }
+ STRING_TOKENIZER_destroy(token);
+ }
+ else
+ {
+ LogError("Unable to create Tokenizer object.");
+ result = __FAILURE__;
+ }
+ STRING_delete(mqttTopic);
+ }
+ return result;
+}
+
+static void mqtt_notification_callback(MQTT_MESSAGE_HANDLE msgHandle, void* callbackCtx)
+{
+ /* Tests_SRS_IOTHUB_MQTT_TRANSPORT_07_051: [ If msgHandle or callbackCtx is NULL, mqtt_notification_callback shall do nothing. ] */
+ if (msgHandle != NULL && callbackCtx != NULL)
+ {
+ /* Tests_SRS_IOTHUB_MQTT_TRANSPORT_07_052: [ mqtt_notification_callback shall extract the topic Name from the MQTT_MESSAGE_HANDLE. ] */
+ const char* topic_resp = mqttmessage_getTopicName(msgHandle);
+ if (topic_resp == NULL)
+ {
+ LogError("Failure: NULL topic name encountered");
+ }
+ else
+ {
+ PMQTTTRANSPORT_HANDLE_DATA transportData = (PMQTTTRANSPORT_HANDLE_DATA)callbackCtx;
+
+ IOTHUB_IDENTITY_TYPE type = retrieve_topic_type(topic_resp, STRING_c_str(transportData->topic_InputQueue));
+ if (type == IOTHUB_TYPE_DEVICE_TWIN)
+ {
+ size_t request_id;
+ int status_code;
+ bool notification_msg;
+ if (parse_device_twin_topic_info(topic_resp, ¬ification_msg, &request_id, &status_code) != 0)
+ {
+ LogError("Failure: parsing device topic info");
+ }
+ else
+ {
+ const APP_PAYLOAD* payload = mqttmessage_getApplicationMsg(msgHandle);
+ if (notification_msg)
+ {
+ IoTHubClientCore_LL_RetrievePropertyComplete(transportData->llClientHandle, DEVICE_TWIN_UPDATE_PARTIAL, payload->message, payload->length);
+ }
+ else
+ {
+ PDLIST_ENTRY dev_twin_item = transportData->ack_waiting_queue.Flink;
+ while (dev_twin_item != &transportData->ack_waiting_queue)
+ {
+ DLIST_ENTRY saveListEntry;
+ saveListEntry.Flink = dev_twin_item->Flink;
+ MQTT_DEVICE_TWIN_ITEM* msg_entry = containingRecord(dev_twin_item, MQTT_DEVICE_TWIN_ITEM, entry);
+ if (request_id == msg_entry->packet_id)
+ {
+ (void)DList_RemoveEntryList(dev_twin_item);
+ if (msg_entry->device_twin_msg_type == RETRIEVE_PROPERTIES)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_054: [ If type is IOTHUB_TYPE_DEVICE_TWIN, then on success if msg_type is RETRIEVE_PROPERTIES then mqtt_notification_callback shall call IoTHubClientCore_LL_RetrievePropertyComplete... ] */
+ IoTHubClientCore_LL_RetrievePropertyComplete(transportData->llClientHandle, DEVICE_TWIN_UPDATE_COMPLETE, payload->message, payload->length);
+ // Only after receiving device twin request should we start listening for patches.
+ (void)subscribeToNotifyStateIfNeeded(transportData);
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_055: [ if device_twin_msg_type is not RETRIEVE_PROPERTIES then mqtt_notification_callback shall call IoTHubClientCore_LL_ReportedStateComplete ] */
+ IoTHubClientCore_LL_ReportedStateComplete(transportData->llClientHandle, msg_entry->iothub_msg_id, status_code);
+ }
+ free(msg_entry);
+ break;
+ }
+ dev_twin_item = saveListEntry.Flink;
+ }
+ }
+ }
+ }
+ else if (type == IOTHUB_TYPE_DEVICE_METHODS)
+ {
+ STRING_HANDLE method_name = STRING_new();
+ if (method_name == NULL)
+ {
+ LogError("Failure: allocating method_name string value");
+ }
+ else
+ {
+ DEVICE_METHOD_INFO* dev_method_info = malloc(sizeof(DEVICE_METHOD_INFO));
+ if (dev_method_info == NULL)
+ {
+ LogError("Failure: allocating DEVICE_METHOD_INFO object");
+ }
+ else
+ {
+ dev_method_info->request_id = STRING_new();
+ if (dev_method_info->request_id == NULL)
+ {
+ LogError("Failure constructing request_id string");
+ free(dev_method_info);
+ }
+ else if (retrieve_device_method_rid_info(topic_resp, method_name, dev_method_info->request_id) != 0)
+ {
+ LogError("Failure: retrieve device topic info");
+ STRING_delete(dev_method_info->request_id);
+ free(dev_method_info);
+ }
+ else
+ {
+ /* CodesSRS_IOTHUB_MQTT_TRANSPORT_07_053: [ If type is IOTHUB_TYPE_DEVICE_METHODS, then on success mqtt_notification_callback shall call IoTHubClientCore_LL_DeviceMethodComplete. ] */
+ const APP_PAYLOAD* payload = mqttmessage_getApplicationMsg(msgHandle);
+ if (IoTHubClientCore_LL_DeviceMethodComplete(transportData->llClientHandle, STRING_c_str(method_name), payload->message, payload->length, (void*)dev_method_info) != 0)
+ {
+ LogError("Failure: IoTHubClientCore_LL_DeviceMethodComplete");
+ STRING_delete(dev_method_info->request_id);
+ free(dev_method_info);
+ }
+ }
+ }
+ STRING_delete(method_name);
+ }
+ }
+ else
+ {
+ const APP_PAYLOAD* appPayload = mqttmessage_getApplicationMsg(msgHandle);
+ IOTHUB_MESSAGE_HANDLE IoTHubMessage = IoTHubMessage_CreateFromByteArray(appPayload->message, appPayload->length);
+ if (IoTHubMessage == NULL)
+ {
+ LogError("Failure: IotHub Message creation has failed.");
+ }
+ else
+ {
+ if ((type == IOTHUB_TYPE_EVENT_QUEUE) && (addInputNamePropertyToMessage(IoTHubMessage, topic_resp) != 0))
+ {
+ LogError("failure adding input name to property.");
+ }
+ // Will need to update this when the service has messages that can be rejected
+ else if (extractMqttProperties(IoTHubMessage, topic_resp, transportData->auto_url_encode_decode) != 0)
+ {
+ LogError("failure extracting mqtt properties.");
+ }
+ else
+ {
+ MESSAGE_CALLBACK_INFO* messageData = (MESSAGE_CALLBACK_INFO*)malloc(sizeof(MESSAGE_CALLBACK_INFO));
+ if (messageData == NULL)
+ {
+ LogError("malloc failed");
+ }
+ else
+ {
+ messageData->messageHandle = IoTHubMessage;
+ messageData->transportContext = NULL;
+
+ if (type == IOTHUB_TYPE_EVENT_QUEUE)
+ {
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_31_065: [ If type is IOTHUB_TYPE_TELEMETRY and sent to an input queue, then on success `mqtt_notification_callback` shall call `IoTHubClient_LL_MessageCallback`. ]
+ if (!IoTHubClientCore_LL_MessageCallbackFromInput(transportData->llClientHandle, messageData))
+ {
+ LogError("IoTHubClientCore_LL_MessageCallbackreturned false");
+
+ IoTHubMessage_Destroy(IoTHubMessage);
+ free(messageData);
+ }
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_056: [ If type is IOTHUB_TYPE_TELEMETRY, then on success mqtt_notification_callback shall call IoTHubClientCore_LL_MessageCallback. ] */
+ if (!IoTHubClientCore_LL_MessageCallback(transportData->llClientHandle, messageData))
+ {
+ LogError("IoTHubClientCore_LL_MessageCallback returned false");
+ IoTHubMessage_Destroy(IoTHubMessage);
+ free(messageData);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+static void mqtt_operation_complete_callback(MQTT_CLIENT_HANDLE handle, MQTT_CLIENT_EVENT_RESULT actionResult, const void* msgInfo, void* callbackCtx)
+{
+ (void)handle;
+ if (callbackCtx != NULL)
+ {
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)callbackCtx;
+
+ switch (actionResult)
+ {
+ case MQTT_CLIENT_ON_PUBLISH_ACK:
+ case MQTT_CLIENT_ON_PUBLISH_COMP:
+ {
+ const PUBLISH_ACK* puback = (const PUBLISH_ACK*)msgInfo;
+ if (puback != NULL)
+ {
+ PDLIST_ENTRY currentListEntry = transport_data->telemetry_waitingForAck.Flink;
+ while (currentListEntry != &transport_data->telemetry_waitingForAck)
+ {
+ MQTT_MESSAGE_DETAILS_LIST* mqttMsgEntry = containingRecord(currentListEntry, MQTT_MESSAGE_DETAILS_LIST, entry);
+ DLIST_ENTRY saveListEntry;
+ saveListEntry.Flink = currentListEntry->Flink;
+
+ if (puback->packetId == mqttMsgEntry->packet_id)
+ {
+ (void)DList_RemoveEntryList(currentListEntry); //First remove the item from Waiting for Ack List.
+ sendMsgComplete(mqttMsgEntry->iotHubMessageEntry, transport_data, IOTHUB_CLIENT_CONFIRMATION_OK);
+ free(mqttMsgEntry);
+ }
+ currentListEntry = saveListEntry.Flink;
+ }
+ }
+ else
+ {
+ LogError("Failure: MQTT_CLIENT_ON_PUBLISH_ACK publish_ack structure NULL.");
+ }
+ break;
+ }
+ case MQTT_CLIENT_ON_CONNACK:
+ {
+ const CONNECT_ACK* connack = (const CONNECT_ACK*)msgInfo;
+ if (connack != NULL)
+ {
+ if (connack->returnCode == CONNECTION_ACCEPTED)
+ {
+ // The connect packet has been acked
+ transport_data->currPacketState = CONNACK_TYPE;
+ transport_data->isRecoverableError = true;
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_CONNECTED;
+
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_008: [ Upon successful connection the retry control shall be reset using retry_control_reset() ]
+ retry_control_reset(transport_data->retry_control_handle);
+
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_AUTHENTICATED, IOTHUB_CLIENT_CONNECTION_OK);
+ }
+ else
+ {
+ if (connack->returnCode == CONN_REFUSED_SERVER_UNAVAIL)
+ {
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_DEVICE_DISABLED);
+ }
+ else if (connack->returnCode == CONN_REFUSED_BAD_USERNAME_PASSWORD || connack->returnCode == CONN_REFUSED_ID_REJECTED)
+ {
+ transport_data->isRecoverableError = false;
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_BAD_CREDENTIAL);
+ }
+ else if (connack->returnCode == CONN_REFUSED_NOT_AUTHORIZED)
+ {
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_DEVICE_DISABLED);
+ }
+ else if (connack->returnCode == CONN_REFUSED_UNACCEPTABLE_VERSION)
+ {
+ transport_data->isRecoverableError = false;
+ }
+ LogError("Connection Not Accepted: 0x%x: %s", connack->returnCode, retrieve_mqtt_return_codes(connack->returnCode));
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_PENDING_CLOSE;
+ transport_data->currPacketState = PACKET_TYPE_ERROR;
+ }
+ }
+ else
+ {
+ LogError("MQTT_CLIENT_ON_CONNACK CONNACK parameter is NULL.");
+ }
+ break;
+ }
+ case MQTT_CLIENT_ON_SUBSCRIBE_ACK:
+ {
+ const SUBSCRIBE_ACK* suback = (const SUBSCRIBE_ACK*)msgInfo;
+ if (suback != NULL)
+ {
+ size_t index = 0;
+ for (index = 0; index < suback->qosCount; index++)
+ {
+ if (suback->qosReturn[index] == DELIVER_FAILURE)
+ {
+ LogError("Subscribe delivery failure of subscribe %lu", index);
+ }
+ }
+ // The connect packet has been acked
+ transport_data->currPacketState = SUBACK_TYPE;
+ }
+ else
+ {
+ LogError("Failure: MQTT_CLIENT_ON_SUBSCRIBE_ACK SUBSCRIBE_ACK parameter is NULL.");
+ }
+ break;
+ }
+ case MQTT_CLIENT_ON_PUBLISH_RECV:
+ case MQTT_CLIENT_ON_PUBLISH_REL:
+ {
+ // Currently not used
+ break;
+ }
+ case MQTT_CLIENT_ON_DISCONNECT:
+ {
+ // Close the client so we can reconnect again
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_NOT_CONNECTED;
+ transport_data->currPacketState = DISCONNECT_TYPE;
+ break;
+ }
+ case MQTT_CLIENT_ON_UNSUBSCRIBE_ACK:
+ case MQTT_CLIENT_ON_PING_RESPONSE:
+ default:
+ {
+ break;
+ }
+ }
+ }
+}
+
+// Prior to creating a new connection, if we have an existing xioTransport that has been connected before
+// we need to clear it now or else cached settings (especially TLS when communicating with HTTP proxies)
+// will break reconnection attempt.
+static void ResetConnectionIfNecessary(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ if (transport_data->xioTransport != NULL && transport_data->conn_attempted)
+ {
+ OPTIONHANDLER_HANDLE options = xio_retrieveoptions(transport_data->xioTransport);
+ set_saved_tls_options(transport_data, options);
+
+ xio_destroy(transport_data->xioTransport);
+ transport_data->xioTransport = NULL;
+ }
+}
+
+static void DisconnectFromClient(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ if (!transport_data->isDestroyCalled)
+ {
+ OPTIONHANDLER_HANDLE options = xio_retrieveoptions(transport_data->xioTransport);
+ set_saved_tls_options(transport_data, options);
+ }
+
+ (void)mqtt_client_disconnect(transport_data->mqttClient, NULL, NULL);
+ xio_destroy(transport_data->xioTransport);
+ transport_data->xioTransport = NULL;
+
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_NOT_CONNECTED;
+ transport_data->currPacketState = DISCONNECT_TYPE;
+}
+
+static void mqtt_error_callback(MQTT_CLIENT_HANDLE handle, MQTT_CLIENT_EVENT_ERROR error, void* callbackCtx)
+{
+ (void)handle;
+ if (callbackCtx != NULL)
+ {
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)callbackCtx;
+ switch (error)
+ {
+ case MQTT_CLIENT_CONNECTION_ERROR:
+ {
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_NO_NETWORK);
+ break;
+ }
+ case MQTT_CLIENT_COMMUNICATION_ERROR:
+ {
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_COMMUNICATION_ERROR);
+ break;
+ }
+ case MQTT_CLIENT_NO_PING_RESPONSE:
+ {
+ LogError("Mqtt Ping Response was not encountered. Reconnecting device...");
+ DisconnectFromClient(transport_data);
+ break;
+ }
+ case MQTT_CLIENT_PARSE_ERROR:
+ case MQTT_CLIENT_MEMORY_ERROR:
+ case MQTT_CLIENT_UNKNOWN_ERROR:
+ {
+ LogError("INTERNAL ERROR: unexpected error value received %s", ENUM_TO_STRING(MQTT_CLIENT_EVENT_ERROR, error));
+ break;
+ }
+ }
+ if (transport_data->mqttClientStatus != MQTT_CLIENT_STATUS_PENDING_CLOSE)
+ {
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_NOT_CONNECTED;
+ }
+ transport_data->currPacketState = PACKET_TYPE_ERROR;
+ transport_data->device_twin_get_sent = false;
+ if (transport_data->topic_MqttMessage != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_TELEMETRY_TOPIC;
+ }
+ if (transport_data->topic_GetState != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_GET_REPORTED_STATE_TOPIC;
+ }
+ if (transport_data->topic_NotifyState != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_NOTIFICATION_STATE_TOPIC;
+ }
+ if (transport_data->topic_DeviceMethods != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_DEVICE_METHOD_TOPIC;
+ }
+ if (transport_data->topic_InputQueue != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_INPUT_QUEUE_TOPIC;
+ }
+ }
+ else
+ {
+ LogError("Failure: mqtt called back with null context.");
+ }
+}
+
+static void SubscribeToMqttProtocol(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ if (transport_data->topics_ToSubscribe != UNSUBSCRIBE_FROM_TOPIC)
+ {
+ uint32_t topic_subscription = 0;
+ size_t subscribe_count = 0;
+ SUBSCRIBE_PAYLOAD subscribe[SUBSCRIBE_TOPIC_COUNT];
+ if ((transport_data->topic_MqttMessage != NULL) && (SUBSCRIBE_TELEMETRY_TOPIC & transport_data->topics_ToSubscribe))
+ {
+ subscribe[subscribe_count].subscribeTopic = STRING_c_str(transport_data->topic_MqttMessage);
+ subscribe[subscribe_count].qosReturn = DELIVER_AT_LEAST_ONCE;
+ topic_subscription |= SUBSCRIBE_TELEMETRY_TOPIC;
+ subscribe_count++;
+ }
+ if ((transport_data->topic_GetState != NULL) && (SUBSCRIBE_GET_REPORTED_STATE_TOPIC & transport_data->topics_ToSubscribe))
+ {
+ subscribe[subscribe_count].subscribeTopic = STRING_c_str(transport_data->topic_GetState);
+ subscribe[subscribe_count].qosReturn = DELIVER_AT_MOST_ONCE;
+ topic_subscription |= SUBSCRIBE_GET_REPORTED_STATE_TOPIC;
+ subscribe_count++;
+ }
+ if ((transport_data->topic_NotifyState != NULL) && (SUBSCRIBE_NOTIFICATION_STATE_TOPIC & transport_data->topics_ToSubscribe))
+ {
+ subscribe[subscribe_count].subscribeTopic = STRING_c_str(transport_data->topic_NotifyState);
+ subscribe[subscribe_count].qosReturn = DELIVER_AT_MOST_ONCE;
+ topic_subscription |= SUBSCRIBE_NOTIFICATION_STATE_TOPIC;
+ subscribe_count++;
+ }
+ if ((transport_data->topic_DeviceMethods != NULL) && (SUBSCRIBE_DEVICE_METHOD_TOPIC & transport_data->topics_ToSubscribe))
+ {
+ subscribe[subscribe_count].subscribeTopic = STRING_c_str(transport_data->topic_DeviceMethods);
+ subscribe[subscribe_count].qosReturn = DELIVER_AT_MOST_ONCE;
+ topic_subscription |= SUBSCRIBE_DEVICE_METHOD_TOPIC;
+ subscribe_count++;
+ }
+ if ((transport_data->topic_InputQueue != NULL) && (SUBSCRIBE_INPUT_QUEUE_TOPIC & transport_data->topics_ToSubscribe))
+ {
+ subscribe[subscribe_count].subscribeTopic = STRING_c_str(transport_data->topic_InputQueue);
+ subscribe[subscribe_count].qosReturn = DELIVER_AT_MOST_ONCE;
+ topic_subscription |= SUBSCRIBE_INPUT_QUEUE_TOPIC;
+ subscribe_count++;
+ }
+
+ if (subscribe_count != 0)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_016: [IoTHubTransport_MQTT_Common_Subscribe shall call mqtt_client_subscribe to subscribe to the Message Topic.] */
+ if (mqtt_client_subscribe(transport_data->mqttClient, get_next_packet_id(transport_data), subscribe, subscribe_count) != 0)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_017: [Upon failure IoTHubTransport_MQTT_Common_Subscribe shall return a non-zero value.] */
+ LogError("Failure: mqtt_client_subscribe returned error.");
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_018: [On success IoTHubTransport_MQTT_Common_Subscribe shall return 0.] */
+ transport_data->topics_ToSubscribe &= ~topic_subscription;
+ transport_data->currPacketState = SUBSCRIBE_TYPE;
+ }
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_017: [Upon failure IoTHubTransport_MQTT_Common_Subscribe shall return a non-zero value.] */
+ LogError("Failure: subscribe_topic is empty.");
+ }
+ transport_data->currPacketState = SUBSCRIBE_TYPE;
+ }
+ else
+ {
+ transport_data->currPacketState = PUBLISH_TYPE;
+ }
+}
+
+static const unsigned char* RetrieveMessagePayload(IOTHUB_MESSAGE_HANDLE messageHandle, size_t* length)
+{
+ const unsigned char* result;
+
+ IOTHUBMESSAGE_CONTENT_TYPE contentType = IoTHubMessage_GetContentType(messageHandle);
+ if (contentType == IOTHUBMESSAGE_BYTEARRAY)
+ {
+ if (IoTHubMessage_GetByteArray(messageHandle, &result, length) != IOTHUB_MESSAGE_OK)
+ {
+ LogError("Failure result from IoTHubMessage_GetByteArray");
+ result = NULL;
+ *length = 0;
+ }
+ }
+ else if (contentType == IOTHUBMESSAGE_STRING)
+ {
+ result = (const unsigned char*)IoTHubMessage_GetString(messageHandle);
+ if (result == NULL)
+ {
+ LogError("Failure result from IoTHubMessage_GetString");
+ result = NULL;
+ *length = 0;
+ }
+ else
+ {
+ *length = strlen((const char*)result);
+ }
+ }
+ else
+ {
+ result = NULL;
+ *length = 0;
+ }
+ return result;
+}
+
+static int GetTransportProviderIfNecessary(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ int result;
+
+ if (transport_data->xioTransport == NULL)
+ {
+ // construct address
+ const char* hostAddress = STRING_c_str(transport_data->hostAddress);
+ MQTT_TRANSPORT_PROXY_OPTIONS mqtt_proxy_options;
+
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_011: [ If no `proxy_data` option has been set, NULL shall be passed as the argument `mqtt_transport_proxy_options` when calling the function `get_io_transport` passed in `IoTHubTransport_MQTT_Common__Create`. ]*/
+ mqtt_proxy_options.host_address = transport_data->http_proxy_hostname;
+ mqtt_proxy_options.port = transport_data->http_proxy_port;
+ mqtt_proxy_options.username = transport_data->http_proxy_username;
+ mqtt_proxy_options.password = transport_data->http_proxy_password;
+
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_010: [ If the `proxy_data` option has been set, the proxy options shall be filled in the argument `mqtt_transport_proxy_options` when calling the function `get_io_transport` passed in `IoTHubTransport_MQTT_Common__Create` to obtain the underlying IO handle. ]*/
+ transport_data->xioTransport = transport_data->get_io_transport(hostAddress, (transport_data->http_proxy_hostname == NULL) ? NULL : &mqtt_proxy_options);
+ if (transport_data->xioTransport == NULL)
+ {
+ LogError("Unable to create the lower level TLS layer.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ transport_data->conn_attempted = true;
+ if (transport_data->saved_tls_options != NULL)
+ {
+ if (OptionHandler_FeedOptions(transport_data->saved_tls_options, transport_data->xioTransport) != OPTIONHANDLER_OK)
+ {
+ LogError("Failed feeding existing options to new TLS instance.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ // The tlsio has the options, so our copy can be deleted
+ set_saved_tls_options(transport_data, NULL);
+ result = 0;
+ }
+ }
+ else if (IoTHubClient_Auth_Get_Credential_Type(transport_data->authorization_module) == IOTHUB_CREDENTIAL_TYPE_X509_ECC)
+ {
+ if (IoTHubClient_Auth_Set_xio_Certificate(transport_data->authorization_module, transport_data->xioTransport) != 0)
+ {
+ LogError("Unable to create the lower level TLS layer.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ result = 0;
+ }
+ }
+ else
+ {
+ result = 0;
+ }
+ }
+ }
+ else
+ {
+ result = 0;
+ }
+ return result;
+}
+
+//static int is_key_validate(const IOTHUBTRANSPORT_CONFIG* config)
+//{
+// int result;
+// IOTHUB_CREDENTIAL_TYPE cred_type = IoTHubClient_Auth_Get_Credential_Type(config->auth_module_handle);
+// if (cred_type == IOTHUB_CREDENTIAL_TYPE_X509 || cred_type == IOTHUB_CREDENTIAL_TYPE_X509_ECC)
+// {
+// result = 0;
+// }
+// else
+// {
+// if (config->upperConfig->deviceKey == NULL && config->upperConfig->deviceSasToken == NULL)
+// {
+// if (IoTHubClient_Auth_Get_DeviceKey(config->auth_module_handle) == NULL)
+// {
+// result = __FAILURE__;
+// }
+// else
+// {
+// result = 0;
+// }
+// }
+// else
+// {
+// result = 0;
+// }
+// }
+// return result;
+//}
+
+static STRING_HANDLE buildClientId(const char* device_id, const char* module_id)
+{
+ if (module_id == NULL)
+ {
+ return STRING_construct_sprintf("%s", device_id);
+ }
+ else
+ {
+ return STRING_construct_sprintf("%s/%s", device_id, module_id);
+ }
+}
+
+static int SendMqttConnectMsg(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ int result;
+
+ char* sasToken = NULL;
+ result = 0;
+
+ IOTHUB_CREDENTIAL_TYPE cred_type = IoTHubClient_Auth_Get_Credential_Type(transport_data->authorization_module);
+ if (cred_type == IOTHUB_CREDENTIAL_TYPE_DEVICE_KEY || cred_type == IOTHUB_CREDENTIAL_TYPE_DEVICE_AUTH)
+ {
+ sasToken = IoTHubClient_Auth_Get_SasToken(transport_data->authorization_module, STRING_c_str(transport_data->devicesAndModulesPath), transport_data->option_sas_token_lifetime_secs, NULL);
+ if (sasToken == NULL)
+ {
+ LogError("failure getting sas token from IoTHubClient_Auth_Get_SasToken.");
+ result = __FAILURE__;
+ }
+ }
+ else if (cred_type == IOTHUB_CREDENTIAL_TYPE_SAS_TOKEN)
+ {
+ SAS_TOKEN_STATUS token_status = IoTHubClient_Auth_Is_SasToken_Valid(transport_data->authorization_module);
+ if (token_status == SAS_TOKEN_STATUS_INVALID)
+ {
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_EXPIRED_SAS_TOKEN);
+ result = __FAILURE__;
+ }
+ else if (token_status == SAS_TOKEN_STATUS_FAILED)
+ {
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_BAD_CREDENTIAL);
+ result = __FAILURE__;
+ }
+ else
+ {
+ sasToken = IoTHubClient_Auth_Get_SasToken(transport_data->authorization_module, NULL, 0, NULL);
+ if (sasToken == NULL)
+ {
+ LogError("failure getting sas Token.");
+ result = __FAILURE__;
+ }
+ }
+ }
+
+ if (result == 0)
+ {
+ if (!transport_data->isProductInfoSet)
+ {
+ // This requires the iothubClientHandle, which sadly the MQTT transport only gets on DoWork, so this code still needs to remain here.
+ // The correct place for this would be in the Create method, but we don't get the client handle there.
+ // Also, when device multiplexing is used, the customer creates the transport directly and explicitly, when the client is still not created.
+ // This will be a major hurdle when we add device multiplexing to MQTT transport.
+
+ void* product_info;
+ STRING_HANDLE clone;
+ if ((IoTHubClientCore_LL_GetOption(transport_data->llClientHandle, OPTION_PRODUCT_INFO, &product_info) == IOTHUB_CLIENT_ERROR) || (product_info == NULL))
+ {
+ clone = STRING_construct_sprintf("%s%%2F%s", CLIENT_DEVICE_TYPE_PREFIX, IOTHUB_SDK_VERSION);
+ }
+ else
+ {
+ clone = URL_Encode(product_info);
+ }
+
+ if (clone == NULL)
+ {
+ LogError("Failed obtaining the product info");
+ }
+ else
+ {
+ if (STRING_concat_with_STRING(transport_data->configPassedThroughUsername, clone) != 0)
+ {
+ LogError("Failed concatenating the product info");
+ }
+ else
+ {
+ transport_data->isProductInfoSet = true;
+ }
+
+ STRING_delete(clone);
+ }
+ }
+
+ STRING_HANDLE clientId;
+
+ clientId = buildClientId(STRING_c_str(transport_data->device_id), STRING_c_str(transport_data->module_id));
+ if (NULL == clientId)
+ {
+ LogError("Unable to allocate clientId");
+ result = __FAILURE__;
+ }
+ else
+ {
+ MQTT_CLIENT_OPTIONS options = { 0 };
+ options.clientId = (char*)STRING_c_str(clientId);
+ options.willMessage = NULL;
+ options.username = (char*)STRING_c_str(transport_data->configPassedThroughUsername);
+ if (sasToken != NULL)
+ {
+ options.password = sasToken;
+ }
+ options.keepAliveInterval = transport_data->keepAliveValue;
+ options.useCleanSession = false;
+ options.qualityOfServiceValue = DELIVER_AT_LEAST_ONCE;
+
+ if (GetTransportProviderIfNecessary(transport_data) == 0)
+ {
+ if (mqtt_client_connect(transport_data->mqttClient, transport_data->xioTransport, &options) != 0)
+ {
+ LogError("failure connecting to address %s.", STRING_c_str(transport_data->hostAddress));
+ result = __FAILURE__;
+ }
+ else
+ {
+ (void)tickcounter_get_current_ms(transport_data->msgTickCounter, &transport_data->mqtt_connect_time);
+ result = 0;
+ }
+ }
+ else
+ {
+ result = __FAILURE__;
+ }
+
+ if (sasToken != NULL)
+ {
+ free(sasToken);
+ }
+ STRING_delete(clientId);
+ }
+
+ }
+ return result;
+}
+
+static int InitializeConnection(PMQTTTRANSPORT_HANDLE_DATA transport_data)
+{
+ int result = 0;
+
+ // Make sure we're not destroying the object
+ if (!transport_data->isDestroyCalled)
+ {
+ RETRY_ACTION retry_action = RETRY_ACTION_RETRY_LATER;
+
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_007: [ IoTHubTransport_MQTT_Common_DoWork shall try to reconnect according to the current retry policy set ]
+ if (transport_data->mqttClientStatus == MQTT_CLIENT_STATUS_NOT_CONNECTED && transport_data->isRecoverableError &&
+ (retry_control_should_retry(transport_data->retry_control_handle, &retry_action) != 0 || retry_action == RETRY_ACTION_RETRY_NOW))
+ {
+ // Note: in case retry_control_should_retry fails, the reconnection shall be attempted anyway (defaulting to policy IOTHUB_CLIENT_RETRY_IMMEDIATE).
+
+ if (tickcounter_get_current_ms(transport_data->msgTickCounter, &transport_data->connectTick) != 0)
+ {
+ transport_data->connectFailCount++;
+ result = __FAILURE__;
+ }
+ else
+ {
+ ResetConnectionIfNecessary(transport_data);
+
+ if (SendMqttConnectMsg(transport_data) != 0)
+ {
+ transport_data->connectFailCount++;
+ result = __FAILURE__;
+ }
+ else
+ {
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_CONNECTING;
+ transport_data->connectFailCount = 0;
+ result = 0;
+ }
+ }
+ }
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_001: [ IoTHubTransport_MQTT_Common_DoWork shall trigger reconnection if the mqtt_client_connect does not complete within `keepalive` seconds]
+ else if (transport_data->mqttClientStatus == MQTT_CLIENT_STATUS_CONNECTING)
+ {
+ tickcounter_ms_t current_time;
+ if (tickcounter_get_current_ms(transport_data->msgTickCounter, ¤t_time) != 0)
+ {
+ LogError("failed verifying MQTT_CLIENT_STATUS_CONNECTING timeout");
+ result = __FAILURE__;
+ }
+ else if ((current_time - transport_data->mqtt_connect_time) / 1000 > transport_data->connect_timeout_in_sec)
+ {
+ LogError("mqtt_client timed out waiting for CONNACK");
+ DisconnectFromClient(transport_data);
+ result = __FAILURE__;
+ }
+ }
+ else if (transport_data->mqttClientStatus == MQTT_CLIENT_STATUS_CONNECTED)
+ {
+ // We are connected and not being closed, so does SAS need to reconnect?
+ tickcounter_ms_t current_time;
+ if (tickcounter_get_current_ms(transport_data->msgTickCounter, ¤t_time) != 0)
+ {
+ transport_data->connectFailCount++;
+ result = __FAILURE__;
+ }
+ else
+ {
+ if ((current_time - transport_data->mqtt_connect_time) / 1000 > (transport_data->option_sas_token_lifetime_secs*SAS_REFRESH_MULTIPLIER))
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_058: [ If the sas token has timed out IoTHubTransport_MQTT_Common_DoWork shall disconnect from the mqtt client and destroy the transport information and wait for reconnect. ] */
+ OPTIONHANDLER_HANDLE options = xio_retrieveoptions(transport_data->xioTransport);
+ set_saved_tls_options(transport_data, options);
+ (void)mqtt_client_disconnect(transport_data->mqttClient, NULL, NULL);
+ xio_destroy(transport_data->xioTransport);
+ transport_data->xioTransport = NULL;
+
+ IoTHubClientCore_LL_ConnectionStatusCallBack(transport_data->llClientHandle, IOTHUB_CLIENT_CONNECTION_UNAUTHENTICATED, IOTHUB_CLIENT_CONNECTION_EXPIRED_SAS_TOKEN);
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_NOT_CONNECTED;
+ transport_data->currPacketState = UNKNOWN_TYPE;
+ transport_data->device_twin_get_sent = false;
+ if (transport_data->topic_MqttMessage != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_TELEMETRY_TOPIC;
+ }
+ if (transport_data->topic_GetState != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_GET_REPORTED_STATE_TOPIC;
+ }
+ if (transport_data->topic_NotifyState != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_NOTIFICATION_STATE_TOPIC;
+ }
+ if (transport_data->topic_DeviceMethods != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_DEVICE_METHOD_TOPIC;
+ }
+ if (transport_data->topic_InputQueue != NULL)
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_INPUT_QUEUE_TOPIC;
+ }
+ }
+ }
+ }
+ }
+ return result;
+}
+
+static STRING_HANDLE buildConfigForUsername(const IOTHUB_CLIENT_CONFIG* upperConfig, const char* moduleId)
+{
+ if (moduleId == NULL)
+ {
+ return STRING_construct_sprintf("%s.%s/%s/?api-version=%s&DeviceClientType=", upperConfig->iotHubName, upperConfig->iotHubSuffix, upperConfig->deviceId, IOTHUB_API_VERSION);
+ }
+ else
+ {
+ return STRING_construct_sprintf("%s.%s/%s/%s/?api-version=%s&DeviceClientType=", upperConfig->iotHubName, upperConfig->iotHubSuffix, upperConfig->deviceId, moduleId, IOTHUB_API_VERSION);
+ }
+}
+
+static STRING_HANDLE buildMqttEventString(const char* device_id, const char* module_id)
+{
+ if (module_id == NULL)
+ {
+ return STRING_construct_sprintf(TOPIC_DEVICE_DEVICE, device_id);
+ }
+ else
+ {
+ return STRING_construct_sprintf(TOPIC_DEVICE_DEVICE_MODULE, device_id, module_id);
+ }
+}
+
+static STRING_HANDLE buildDevicesAndModulesPath(const IOTHUB_CLIENT_CONFIG* upperConfig, const char* moduleId)
+{
+ if (moduleId == NULL)
+ {
+ return STRING_construct_sprintf("%s.%s/devices/%s", upperConfig->iotHubName, upperConfig->iotHubSuffix, upperConfig->deviceId);
+ }
+ else
+ {
+ return STRING_construct_sprintf("%s.%s/devices/%s/modules/%s", upperConfig->iotHubName, upperConfig->iotHubSuffix, upperConfig->deviceId, moduleId);
+ }
+}
+
+static PMQTTTRANSPORT_HANDLE_DATA InitializeTransportHandleData(const IOTHUB_CLIENT_CONFIG* upperConfig, PDLIST_ENTRY waitingToSend, IOTHUB_AUTHORIZATION_HANDLE auth_module, const char* moduleId)
+{
+ PMQTTTRANSPORT_HANDLE_DATA state = (PMQTTTRANSPORT_HANDLE_DATA)malloc(sizeof(MQTTTRANSPORT_HANDLE_DATA));
+ if (state == NULL)
+ {
+ LogError("Could not create MQTT transport state. Memory allocation failed.");
+ }
+ else
+ {
+ memset(state, 0, sizeof(MQTTTRANSPORT_HANDLE_DATA));
+ if ((state->msgTickCounter = tickcounter_create()) == NULL)
+ {
+ LogError("Invalid Argument: iotHubName is empty");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_09_005: [ MQTT transport shall use EXPONENTIAL_WITH_BACK_OFF as default retry policy ]
+ else if ((state->retry_control_handle = retry_control_create(DEFAULT_RETRY_POLICY, DEFAULT_RETRY_TIMEOUT_IN_SECONDS)) == NULL)
+ {
+ LogError("Failed creating default retry control");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else if ((state->device_id = STRING_construct(upperConfig->deviceId)) == NULL)
+ {
+ LogError("failure constructing device_id.");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else if ((moduleId != NULL) && ((state->module_id = STRING_construct(moduleId)) == NULL))
+ {
+ LogError("failure constructing module_id.");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else if ((state->devicesAndModulesPath = buildDevicesAndModulesPath(upperConfig, moduleId)) == NULL)
+ {
+ LogError("failure constructing devicesPath.");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else
+ {
+ if ((state->topic_MqttEvent = buildMqttEventString(upperConfig->deviceId, moduleId)) == NULL)
+ {
+ LogError("Could not create topic_MqttEvent for MQTT");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else
+ {
+ state->mqttClient = mqtt_client_init(mqtt_notification_callback, mqtt_operation_complete_callback, state, mqtt_error_callback, state);
+ if (state->mqttClient == NULL)
+ {
+ LogError("failure initializing mqtt client.");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_008: [If the upperConfig contains a valid protocolGatewayHostName value the this shall be used for the hostname, otherwise the hostname shall be constructed using the iothubname and iothubSuffix.] */
+ if (upperConfig->protocolGatewayHostName == NULL)
+ {
+ state->hostAddress = STRING_construct_sprintf("%s.%s", upperConfig->iotHubName, upperConfig->iotHubSuffix);
+ }
+ else
+ {
+ state->hostAddress = STRING_construct(upperConfig->protocolGatewayHostName);
+ }
+
+ if (state->hostAddress == NULL)
+ {
+ LogError("failure constructing host address.");
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else if ((state->configPassedThroughUsername = buildConfigForUsername(upperConfig, moduleId)) == NULL)
+ {
+ free_transport_handle_data(state);
+ state = NULL;
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_010: [IoTHubTransport_MQTT_Common_Create shall allocate memory to save its internal state where all topics, hostname, device_id, device_key, sasTokenSr and client handle shall be saved.] */
+ DList_InitializeListHead(&(state->telemetry_waitingForAck));
+ DList_InitializeListHead(&(state->ack_waiting_queue));
+ state->isDestroyCalled = false;
+ state->isRegistered = false;
+ state->mqttClientStatus = MQTT_CLIENT_STATUS_NOT_CONNECTED;
+ state->device_twin_get_sent = false;
+ state->isRecoverableError = true;
+ state->packetId = 1;
+ state->llClientHandle = NULL;
+ state->xioTransport = NULL;
+ state->portNum = 0;
+ state->waitingToSend = waitingToSend;
+ state->currPacketState = CONNECT_TYPE;
+ state->keepAliveValue = DEFAULT_MQTT_KEEPALIVE;
+ state->connect_timeout_in_sec = DEFAULT_CONNACK_TIMEOUT;
+ state->connectFailCount = 0;
+ state->connectTick = 0;
+ state->topic_MqttMessage = NULL;
+ state->topic_GetState = NULL;
+ state->topic_NotifyState = NULL;
+ state->topics_ToSubscribe = UNSUBSCRIBE_FROM_TOPIC;
+ state->topic_DeviceMethods = NULL;
+ state->topic_InputQueue = NULL;
+ state->log_trace = state->raw_trace = false;
+ srand((unsigned int)get_time(NULL));
+ state->authorization_module = auth_module;
+ state->isProductInfoSet = false;
+ state->option_sas_token_lifetime_secs = SAS_TOKEN_DEFAULT_LIFETIME;
+ state->auto_url_encode_decode = false;
+ state->conn_attempted = false;
+ }
+ }
+ }
+ }
+ }
+ return state;
+}
+
+TRANSPORT_LL_HANDLE IoTHubTransport_MQTT_Common_Create(const IOTHUBTRANSPORT_CONFIG* config, MQTT_GET_IO_TRANSPORT get_io_transport)
+{
+ PMQTTTRANSPORT_HANDLE_DATA result;
+ size_t deviceIdSize;
+
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_001: [If parameter config is NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_041: [ if get_io_transport is NULL then IoTHubTransport_MQTT_Common_Create shall return NULL. ] */
+ if (config == NULL || get_io_transport == NULL)
+ {
+ LogError("Invalid Argument: Config Parameter is NULL.");
+ result = NULL;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_002: [If the parameter config's variables upperConfig, auth_module_handle or waitingToSend are NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ else if (config->auth_module_handle == NULL)
+ {
+ LogError("Invalid Argument: auth_module_handle is NULL)");
+ result = NULL;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_002: [If the parameter config's variables upperConfig or waitingToSend are NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_003: [If the upperConfig's variables deviceId, both deviceKey and deviceSasToken, iotHubName, protocol, or iotHubSuffix are NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_03_003: [If both deviceKey & deviceSasToken fields are NOT NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ else if (config->upperConfig == NULL ||
+ config->upperConfig->protocol == NULL ||
+ config->upperConfig->deviceId == NULL ||
+ ((config->upperConfig->deviceKey != NULL) && (config->upperConfig->deviceSasToken != NULL)) ||
+ //is_key_validate(config) != 0 ||
+ config->upperConfig->iotHubName == NULL ||
+ config->upperConfig->iotHubSuffix == NULL)
+ {
+ LogError("Invalid Argument: upperConfig structure contains an invalid parameter");
+ result = NULL;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_002: [If the parameter config's variables upperConfig, auth_module_handle or waitingToSend are NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ else if (config->waitingToSend == NULL)
+ {
+ LogError("Invalid Argument: waitingToSend is NULL)");
+ result = NULL;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_006: [If the upperConfig's variables deviceId is an empty strings or length is greater then 128 then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ else if (((deviceIdSize = strlen(config->upperConfig->deviceId)) > 128U) || (deviceIdSize == 0))
+ {
+ LogError("Invalid Argument: DeviceId is of an invalid size");
+ result = NULL;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_003: [If the upperConfig's variables deviceId, both deviceKey and deviceSasToken, iotHubName, protocol, or iotHubSuffix are NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ else if ((config->upperConfig->deviceKey != NULL) && (strlen(config->upperConfig->deviceKey) == 0))
+ {
+ LogError("Invalid Argument: deviceKey is empty");
+ result = NULL;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_003: [If the upperConfig's variables deviceId, both deviceKey and deviceSasToken, iotHubName, protocol, or iotHubSuffix are NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ else if ((config->upperConfig->deviceSasToken != NULL) && (strlen(config->upperConfig->deviceSasToken) == 0))
+ {
+ LogError("Invalid Argument: deviceSasToken is empty");
+ result = NULL;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_003: [If the upperConfig's variables deviceId, deviceKey, iotHubName, protocol, or iotHubSuffix are NULL then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ else if (strlen(config->upperConfig->iotHubName) == 0)
+ {
+ LogError("Invalid Argument: iotHubName is empty");
+ result = NULL;
+ }
+ else
+ {
+ result = InitializeTransportHandleData(config->upperConfig, config->waitingToSend, config->auth_module_handle, config->moduleId);
+ if (result != NULL)
+ {
+ result->get_io_transport = get_io_transport;
+ result->http_proxy_hostname = NULL;
+ result->http_proxy_username = NULL;
+ result->http_proxy_password = NULL;
+ }
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_009: [If any error is encountered then IoTHubTransport_MQTT_Common_Create shall return NULL.] */
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_011: [On Success IoTHubTransport_MQTT_Common_Create shall return a non-NULL value.] */
+ return result;
+}
+
+void IoTHubTransport_MQTT_Common_Destroy(TRANSPORT_LL_HANDLE handle)
+{
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_012: [IoTHubTransport_MQTT_Common_Destroy shall do nothing if parameter handle is NULL.] */
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ if (transport_data != NULL)
+ {
+ transport_data->isDestroyCalled = true;
+
+ DisconnectFromClient(transport_data);
+
+ //Empty the Waiting for Ack Messages.
+ while (!DList_IsListEmpty(&transport_data->telemetry_waitingForAck))
+ {
+ PDLIST_ENTRY currentEntry = DList_RemoveHeadList(&transport_data->telemetry_waitingForAck);
+ MQTT_MESSAGE_DETAILS_LIST* mqttMsgEntry = containingRecord(currentEntry, MQTT_MESSAGE_DETAILS_LIST, entry);
+ sendMsgComplete(mqttMsgEntry->iotHubMessageEntry, transport_data, IOTHUB_CLIENT_CONFIRMATION_BECAUSE_DESTROY);
+ free(mqttMsgEntry);
+ }
+ while (!DList_IsListEmpty(&transport_data->ack_waiting_queue))
+ {
+ PDLIST_ENTRY currentEntry = DList_RemoveHeadList(&transport_data->ack_waiting_queue);
+ MQTT_DEVICE_TWIN_ITEM* mqtt_device_twin = containingRecord(currentEntry, MQTT_DEVICE_TWIN_ITEM, entry);
+ IoTHubClientCore_LL_ReportedStateComplete(transport_data->llClientHandle, mqtt_device_twin->iothub_msg_id, STATUS_CODE_TIMEOUT_VALUE);
+ free(mqtt_device_twin);
+ }
+
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_014: [IoTHubTransport_MQTT_Common_Destroy shall free all the resources currently in use.] */
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_012: [ `IoTHubTransport_MQTT_Common_Destroy` shall free the stored proxy options. ]*/
+ free_transport_handle_data(transport_data);
+ }
+}
+
+int IoTHubTransport_MQTT_Common_Subscribe_DeviceTwin(IOTHUB_DEVICE_HANDLE handle)
+{
+ int result;
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ if (transport_data == NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_042: [If the parameter handle is NULL than IoTHubTransport_MQTT_Common_Subscribe shall return a non-zero value.] */
+ LogError("Invalid handle parameter. NULL.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (transport_data->topic_GetState == NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_044: [IoTHubTransport_MQTT_Common_Subscribe_DeviceTwin shall construct the get state topic string and the notify state topic string.] */
+ transport_data->topic_GetState = STRING_construct(TOPIC_GET_DESIRED_STATE);
+ if (transport_data->topic_GetState == NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_046: [Upon failure IoTHubTransport_MQTT_Common_Subscribe_DeviceTwin shall return a non-zero value.] */
+ LogError("Failure: unable constructing reported state topic");
+ result = __FAILURE__;
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_047: [On success IoTHubTransport_MQTT_Common_Subscribe_DeviceTwin shall return 0.] */
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_GET_REPORTED_STATE_TOPIC;
+ result = 0;
+ }
+ }
+ else
+ {
+ result = 0;
+ }
+ if (result == 0)
+ {
+ changeStateToSubscribeIfAllowed(transport_data);
+ }
+ }
+ return result;
+}
+
+void IoTHubTransport_MQTT_Common_Unsubscribe_DeviceTwin(IOTHUB_DEVICE_HANDLE handle)
+{
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_048: [If the parameter handle is NULL than IoTHubTransport_MQTT_Common_Unsubscribe_DeviceTwin shall do nothing.] */
+ if (transport_data != NULL)
+ {
+ if (transport_data->topic_GetState != NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_049: [If subscribe_state is set to IOTHUB_DEVICE_TWIN_DESIRED_STATE then IoTHubTransport_MQTT_Common_Unsubscribe_DeviceTwin shall unsubscribe from the topic_GetState to the mqtt client.] */
+ transport_data->topics_ToSubscribe &= ~SUBSCRIBE_GET_REPORTED_STATE_TOPIC;
+ STRING_delete(transport_data->topic_GetState);
+ transport_data->topic_GetState = NULL;
+ }
+ if (transport_data->topic_NotifyState != NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_050: [If subscribe_state is set to IOTHUB_DEVICE_TWIN_NOTIFICATION_STATE then IoTHubTransport_MQTT_Common_Unsubscribe_DeviceTwin shall unsubscribe from the topic_NotifyState to the mqtt client.] */
+ transport_data->topics_ToSubscribe &= ~SUBSCRIBE_NOTIFICATION_STATE_TOPIC;
+ STRING_delete(transport_data->topic_NotifyState);
+ transport_data->topic_NotifyState = NULL;
+ }
+ }
+ else
+ {
+ LogError("Invalid argument to unsubscribe (handle is NULL).");
+ }
+}
+
+int IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod(IOTHUB_DEVICE_HANDLE handle)
+{
+ int result;
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+
+ if (transport_data == NULL)
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_001 : [If the parameter handle is NULL than IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod shall return a non - zero value.]*/
+ LogError("Invalid handle parameter. NULL.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (transport_data->topic_DeviceMethods == NULL)
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_004 : [IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod shall construct the DEVICE_METHOD topic string for subscribe.]*/
+ transport_data->topic_DeviceMethods = STRING_construct(TOPIC_DEVICE_METHOD_SUBSCRIBE);
+ if (transport_data->topic_DeviceMethods == NULL)
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_006 : [Upon failure IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod shall return a non - zero value.]*/
+ LogError("Failure: unable constructing device method subscribe topic");
+ result = __FAILURE__;
+ }
+ else
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_003 : [IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod shall set the signaling flag for DEVICE_METHOD topic for the receiver's topic list. ]*/
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_DEVICE_METHOD_TOPIC;
+ result = 0;
+ }
+ }
+ else
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_002 : [If the MQTT transport has been previously subscribed to DEVICE_METHOD topic IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod shall do nothing and return 0.]*/
+ result = 0;
+ }
+
+ if (result == 0)
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_005 : [IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod shall schedule the send of the subscription.]*/
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_007 : [On success IoTHubTransport_MQTT_Common_Subscribe_DeviceMethod shall return 0.]*/
+ changeStateToSubscribeIfAllowed(transport_data);
+ }
+ }
+ return result;
+}
+
+void IoTHubTransport_MQTT_Common_Unsubscribe_DeviceMethod(IOTHUB_DEVICE_HANDLE handle)
+{
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_008 : [If the parameter handle is NULL than IoTHubTransport_MQTT_Common_Unsubscribe_DeviceMethod shall do nothing and return.]*/
+ if (transport_data != NULL)
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_009 : [If the MQTT transport has not been subscribed to DEVICE_METHOD topic IoTHubTransport_MQTT_Common_Unsubscribe_DeviceMethod shall do nothing and return.]*/
+ if (transport_data->topic_DeviceMethods != NULL)
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_010 : [IoTHubTransport_MQTT_Common_Unsubscribe_DeviceMethod shall construct the DEVICE_METHOD topic string for unsubscribe.]*/
+ const char* unsubscribe[1];
+ unsubscribe[0] = STRING_c_str(transport_data->topic_DeviceMethods);
+
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_011 : [IoTHubTransport_MQTT_Common_Unsubscribe_DeviceMethod shall send the unsubscribe.]*/
+ if (mqtt_client_unsubscribe(transport_data->mqttClient, get_next_packet_id(transport_data), unsubscribe, 1) != 0)
+ {
+ LogError("Failure calling mqtt_client_unsubscribe");
+ }
+
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_12_012 : [IoTHubTransport_MQTT_Common_Unsubscribe_DeviceMethod shall removes the signaling flag for DEVICE_METHOD topic from the receiver's topic list. ]*/
+ STRING_delete(transport_data->topic_DeviceMethods);
+ transport_data->topic_DeviceMethods = NULL;
+ transport_data->topics_ToSubscribe &= ~SUBSCRIBE_DEVICE_METHOD_TOPIC;
+ }
+ }
+ else
+ {
+ LogError("Invalid argument to unsubscribe (NULL).");
+ }
+}
+
+int IoTHubTransport_MQTT_Common_DeviceMethod_Response(IOTHUB_DEVICE_HANDLE handle, METHOD_HANDLE methodId, const unsigned char* response, size_t respSize, int status)
+{
+ int result;
+ MQTTTRANSPORT_HANDLE_DATA* transport_data = (MQTTTRANSPORT_HANDLE_DATA*)handle;
+ if (transport_data != NULL)
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_042: [ IoTHubTransport_MQTT_Common_DeviceMethod_Response shall publish an mqtt message for the device method response. ] */
+ DEVICE_METHOD_INFO* dev_method_info = (DEVICE_METHOD_INFO*)methodId;
+ if (dev_method_info == NULL)
+ {
+ LogError("Failure: DEVICE_METHOD_INFO was NULL");
+ result = __FAILURE__;
+ }
+ else
+ {
+ if (publish_device_method_message(transport_data, status, dev_method_info->request_id, response, respSize) != 0)
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_051: [ If any error is encountered, IoTHubTransport_MQTT_Common_DeviceMethod_Response shall return a non-zero value. ] */
+ LogError("Failure: publishing device method response");
+ result = __FAILURE__;
+ }
+ else
+ {
+ result = 0;
+ }
+ STRING_delete(dev_method_info->request_id);
+ free(dev_method_info);
+ }
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_041: [ If the parameter handle is NULL than IoTHubTransport_MQTT_Common_DeviceMethod_Response shall return a non-zero value. ] */
+ result = __FAILURE__;
+ LogError("Failure: invalid IOTHUB_DEVICE_HANDLE parameter specified");
+ }
+ return result;
+}
+
+static STRING_HANDLE buildTopicMqttMessage(const char* device_id, const char* module_id)
+{
+ if (module_id == NULL)
+ {
+ return STRING_construct_sprintf(TOPIC_DEVICE_MSG, device_id);
+ }
+ else
+ {
+ return STRING_construct_sprintf(TOPIC_DEVICE_MODULE_MSG, device_id, module_id);
+ }
+}
+
+int IoTHubTransport_MQTT_Common_Subscribe(IOTHUB_DEVICE_HANDLE handle)
+{
+ int result;
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ if (transport_data == NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_015: [If parameter handle is NULL than IoTHubTransport_MQTT_Common_Subscribe shall return a non-zero value.] */
+ LogError("Invalid handle parameter. NULL.");
+ result = __FAILURE__;
+ }
+ else
+ {
+ /* Code_SRS_IOTHUB_MQTT_TRANSPORT_07_016: [IoTHubTransport_MQTT_Common_Subscribe shall set a flag to enable mqtt_client_subscribe to be called to subscribe to the Message Topic.] */
+ transport_data->topic_MqttMessage = buildTopicMqttMessage(STRING_c_str(transport_data->device_id), STRING_c_str(transport_data->module_id));
+ if (transport_data->topic_MqttMessage == NULL)
+ {
+ LogError("Failure constructing Message Topic");
+ result = __FAILURE__;
+ }
+ else
+ {
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_TELEMETRY_TOPIC;
+ /* Code_SRS_IOTHUB_MQTT_TRANSPORT_07_035: [If current packet state is not CONNACT, DISCONNECT_TYPE, or PACKET_TYPE_ERROR then IoTHubTransport_MQTT_Common_Subscribe shall set the packet state to SUBSCRIBE_TYPE.]*/
+ changeStateToSubscribeIfAllowed(transport_data);
+ result = 0;
+ }
+ }
+ return result;
+}
+
+void IoTHubTransport_MQTT_Common_Unsubscribe(IOTHUB_DEVICE_HANDLE handle)
+{
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_019: [If parameter handle is NULL then IoTHubTransport_MQTT_Common_Unsubscribe shall do nothing.] */
+ if (transport_data != NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_020: [IoTHubTransport_MQTT_Common_Unsubscribe shall call mqtt_client_unsubscribe to unsubscribe the mqtt message topic.] */
+ const char* unsubscribe[1];
+ unsubscribe[0] = STRING_c_str(transport_data->topic_MqttMessage);
+ if (mqtt_client_unsubscribe(transport_data->mqttClient, get_next_packet_id(transport_data), unsubscribe, 1) != 0)
+ {
+ LogError("Failure calling mqtt_client_unsubscribe");
+ }
+ STRING_delete(transport_data->topic_MqttMessage);
+ transport_data->topic_MqttMessage = NULL;
+ transport_data->topics_ToSubscribe &= ~SUBSCRIBE_TELEMETRY_TOPIC;
+ }
+ else
+ {
+ LogError("Invalid argument to unsubscribe (NULL).");
+ }
+}
+
+IOTHUB_PROCESS_ITEM_RESULT IoTHubTransport_MQTT_Common_ProcessItem(TRANSPORT_LL_HANDLE handle, IOTHUB_IDENTITY_TYPE item_type, IOTHUB_IDENTITY_INFO* iothub_item)
+{
+ IOTHUB_PROCESS_ITEM_RESULT result;
+ /* Codes_SRS_IOTHUBCLIENT_LL_07_001: [ If handle or iothub_item are NULL then IoTHubTransport_MQTT_Common_ProcessItem shall return IOTHUB_PROCESS_ERROR. ]*/
+ if (handle == NULL || iothub_item == NULL)
+ {
+ LogError("Invalid handle parameter iothub_item=%p", iothub_item);
+ result = IOTHUB_PROCESS_ERROR;
+ }
+ else
+ {
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+
+ if (transport_data->currPacketState == PUBLISH_TYPE)
+ {
+ if (item_type == IOTHUB_TYPE_DEVICE_TWIN)
+ {
+ MQTT_DEVICE_TWIN_ITEM* mqtt_info = (MQTT_DEVICE_TWIN_ITEM*)malloc(sizeof(MQTT_DEVICE_TWIN_ITEM));
+ if (mqtt_info == NULL)
+ {
+ /* Codes_SRS_IOTHUBCLIENT_LL_07_004: [ If any errors are encountered IoTHubTransport_MQTT_Common_ProcessItem shall return IOTHUB_PROCESS_ERROR. ]*/
+ result = IOTHUB_PROCESS_ERROR;
+ }
+ else
+ {
+ /*Codes_SRS_IOTHUBCLIENT_LL_07_003: [ IoTHubTransport_MQTT_Common_ProcessItem shall publish a message to the mqtt protocol with the message topic for the message type.]*/
+ mqtt_info->iothub_type = item_type;
+ mqtt_info->iothub_msg_id = iothub_item->device_twin->item_id;
+ mqtt_info->retryCount = 0;
+
+ /* Codes_SRS_IOTHUBCLIENT_LL_07_005: [ If successful IoTHubTransport_MQTT_Common_ProcessItem shall add mqtt info structure acknowledgement queue. ] */
+ DList_InsertTailList(&transport_data->ack_waiting_queue, &mqtt_info->entry);
+
+ if (publish_device_twin_message(transport_data, iothub_item->device_twin, mqtt_info) != 0)
+ {
+ DList_RemoveEntryList(&mqtt_info->entry);
+
+ free(mqtt_info);
+ /* Codes_SRS_IOTHUBCLIENT_LL_07_004: [ If any errors are encountered IoTHubTransport_MQTT_Common_ProcessItem shall return IOTHUB_PROCESS_ERROR. ]*/
+ result = IOTHUB_PROCESS_ERROR;
+ }
+ else
+ {
+ result = IOTHUB_PROCESS_OK;
+ }
+ }
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUBCLIENT_LL_07_006: [ If the item_type is not a supported type IoTHubTransport_MQTT_Common_ProcessItem shall return IOTHUB_PROCESS_CONTINUE. ]*/
+ result = IOTHUB_PROCESS_CONTINUE;
+ }
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUBCLIENT_LL_07_002: [ If the mqtt is not ready to publish messages IoTHubTransport_MQTT_Common_ProcessItem shall return IOTHUB_PROCESS_NOT_CONNECTED. ] */
+ result = IOTHUB_PROCESS_NOT_CONNECTED;
+ }
+ }
+ return result;
+}
+
+/* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_054: [ IoTHubTransport_MQTT_Common_DoWork shall subscribe to the Notification and get_state Topics if they are defined. ] */
+void IoTHubTransport_MQTT_Common_DoWork(TRANSPORT_LL_HANDLE handle, IOTHUB_CLIENT_CORE_LL_HANDLE iotHubClientHandle)
+{
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_026: [IoTHubTransport_MQTT_Common_DoWork shall do nothing if parameter handle and/or iotHubClientHandle is NULL.] */
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ if (transport_data != NULL && iotHubClientHandle != NULL)
+ {
+ transport_data->llClientHandle = iotHubClientHandle;
+
+ if (InitializeConnection(transport_data) != 0)
+ {
+ // Don't want to flood the logs with failures here
+ }
+ else
+ {
+ if (transport_data->mqttClientStatus == MQTT_CLIENT_STATUS_PENDING_CLOSE)
+ {
+ mqtt_client_disconnect(transport_data->mqttClient, NULL, NULL);
+ transport_data->mqttClientStatus = MQTT_CLIENT_STATUS_NOT_CONNECTED;
+ }
+ else if (transport_data->currPacketState == CONNACK_TYPE || transport_data->currPacketState == SUBSCRIBE_TYPE)
+ {
+ SubscribeToMqttProtocol(transport_data);
+ }
+ else if (transport_data->currPacketState == SUBACK_TYPE)
+ {
+ if ((transport_data->topic_NotifyState != NULL || transport_data->topic_GetState != NULL) &&
+ !transport_data->device_twin_get_sent)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_055: [ IoTHubTransport_MQTT_Common_DoWork shall send a device twin get property message upon successfully retrieving a SUBACK on device twin topics. ] */
+ if (publish_device_twin_get_message(transport_data) == 0)
+ {
+ transport_data->device_twin_get_sent = true;
+ }
+ else
+ {
+ LogError("Failure: sending device twin get property command.");
+ }
+ }
+ // Publish can be called now
+ transport_data->currPacketState = PUBLISH_TYPE;
+ }
+ else if (transport_data->currPacketState == PUBLISH_TYPE)
+ {
+ PDLIST_ENTRY currentListEntry = transport_data->telemetry_waitingForAck.Flink;
+ while (currentListEntry != &transport_data->telemetry_waitingForAck)
+ {
+ tickcounter_ms_t current_ms;
+ MQTT_MESSAGE_DETAILS_LIST* mqttMsgEntry = containingRecord(currentListEntry, MQTT_MESSAGE_DETAILS_LIST, entry);
+ DLIST_ENTRY nextListEntry;
+ nextListEntry.Flink = currentListEntry->Flink;
+
+ (void)tickcounter_get_current_ms(transport_data->msgTickCounter, ¤t_ms);
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_033: [IoTHubTransport_MQTT_Common_DoWork shall iterate through the Waiting Acknowledge messages looking for any message that has been waiting longer than 2 min.]*/
+ if (((current_ms - mqttMsgEntry->msgPublishTime) / 1000) > RESEND_TIMEOUT_VALUE_MIN)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_034: [If IoTHubTransport_MQTT_Common_DoWork has resent the message two times then it shall fail the message and reconnect to IoTHub ... ] */
+ if (mqttMsgEntry->retryCount >= MAX_SEND_RECOUNT_LIMIT)
+ {
+ PDLIST_ENTRY current_entry;
+ (void)DList_RemoveEntryList(currentListEntry);
+ sendMsgComplete(mqttMsgEntry->iotHubMessageEntry, transport_data, IOTHUB_CLIENT_CONFIRMATION_MESSAGE_TIMEOUT);
+ free(mqttMsgEntry);
+
+ transport_data->currPacketState = PACKET_TYPE_ERROR;
+ transport_data->device_twin_get_sent = false;
+ DisconnectFromClient(transport_data);
+
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_057: [ ... then go through all the rest of the waiting messages and reset the retryCount on the message. ]*/
+ current_entry = transport_data->telemetry_waitingForAck.Flink;
+ while (current_entry != &transport_data->telemetry_waitingForAck)
+ {
+ MQTT_MESSAGE_DETAILS_LIST* msg_reset_entry;
+ msg_reset_entry = containingRecord(current_entry, MQTT_MESSAGE_DETAILS_LIST, entry);
+ msg_reset_entry->retryCount = 0;
+ current_entry = current_entry->Flink;
+ }
+ }
+ else
+ {
+ size_t messageLength;
+ const unsigned char* messagePayload = RetrieveMessagePayload(mqttMsgEntry->iotHubMessageEntry->messageHandle, &messageLength);
+ if (messageLength == 0 || messagePayload == NULL)
+ {
+ LogError("Failure from creating Message IoTHubMessage_GetData");
+ }
+ else
+ {
+ if (publish_mqtt_telemetry_msg(transport_data, mqttMsgEntry, messagePayload, messageLength) != 0)
+ {
+ (void)DList_RemoveEntryList(currentListEntry);
+ sendMsgComplete(mqttMsgEntry->iotHubMessageEntry, transport_data, IOTHUB_CLIENT_CONFIRMATION_ERROR);
+ free(mqttMsgEntry);
+ }
+ }
+ }
+ }
+ currentListEntry = nextListEntry.Flink;
+ }
+
+ currentListEntry = transport_data->waitingToSend->Flink;
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_027: [IoTHubTransport_MQTT_Common_DoWork shall inspect the "waitingToSend" DLIST passed in config structure.] */
+ while (currentListEntry != transport_data->waitingToSend)
+ {
+ IOTHUB_MESSAGE_LIST* iothubMsgList = containingRecord(currentListEntry, IOTHUB_MESSAGE_LIST, entry);
+ DLIST_ENTRY savedFromCurrentListEntry;
+ savedFromCurrentListEntry.Flink = currentListEntry->Flink;
+
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_027: [IoTHubTransport_MQTT_Common_DoWork shall inspect the "waitingToSend" DLIST passed in config structure.] */
+ size_t messageLength;
+ const unsigned char* messagePayload = RetrieveMessagePayload(iothubMsgList->messageHandle, &messageLength);
+ if (messageLength == 0 || messagePayload == NULL)
+ {
+ LogError("Failure result from IoTHubMessage_GetData");
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_029: [IoTHubTransport_MQTT_Common_DoWork shall create a MQTT_MESSAGE_HANDLE and pass this to a call to mqtt_client_publish.] */
+ MQTT_MESSAGE_DETAILS_LIST* mqttMsgEntry = (MQTT_MESSAGE_DETAILS_LIST*)malloc(sizeof(MQTT_MESSAGE_DETAILS_LIST));
+ if (mqttMsgEntry == NULL)
+ {
+ LogError("Allocation Error: Failure allocating MQTT Message Detail List.");
+ }
+ else
+ {
+ mqttMsgEntry->retryCount = 0;
+ mqttMsgEntry->iotHubMessageEntry = iothubMsgList;
+ mqttMsgEntry->packet_id = get_next_packet_id(transport_data);
+ if (publish_mqtt_telemetry_msg(transport_data, mqttMsgEntry, messagePayload, messageLength) != 0)
+ {
+ (void)(DList_RemoveEntryList(currentListEntry));
+ sendMsgComplete(iothubMsgList, transport_data, IOTHUB_CLIENT_CONFIRMATION_ERROR);
+ free(mqttMsgEntry);
+ }
+ else
+ {
+ (void)(DList_RemoveEntryList(currentListEntry));
+ DList_InsertTailList(&(transport_data->telemetry_waitingForAck), &(mqttMsgEntry->entry));
+ }
+ }
+ }
+ currentListEntry = savedFromCurrentListEntry.Flink;
+ }
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_030: [IoTHubTransport_MQTT_Common_DoWork shall call mqtt_client_dowork everytime it is called if it is connected.] */
+ mqtt_client_dowork(transport_data->mqttClient);
+ }
+ }
+}
+
+IOTHUB_CLIENT_RESULT IoTHubTransport_MQTT_Common_GetSendStatus(IOTHUB_DEVICE_HANDLE handle, IOTHUB_CLIENT_STATUS *iotHubClientStatus)
+{
+ IOTHUB_CLIENT_RESULT result;
+
+ if (handle == NULL || iotHubClientStatus == NULL)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_023: [IoTHubTransport_MQTT_Common_GetSendStatus shall return IOTHUB_CLIENT_INVALID_ARG if called with NULL parameter.] */
+ LogError("invalid arument.");
+ result = IOTHUB_CLIENT_INVALID_ARG;
+ }
+ else
+ {
+ MQTTTRANSPORT_HANDLE_DATA* handleData = (MQTTTRANSPORT_HANDLE_DATA*)handle;
+ if (!DList_IsListEmpty(handleData->waitingToSend) || !DList_IsListEmpty(&(handleData->telemetry_waitingForAck)))
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_025: [IoTHubTransport_MQTT_Common_GetSendStatus shall return IOTHUB_CLIENT_OK and status IOTHUB_CLIENT_SEND_STATUS_BUSY if there are currently event items to be sent or being sent.] */
+ *iotHubClientStatus = IOTHUB_CLIENT_SEND_STATUS_BUSY;
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_024: [IoTHubTransport_MQTT_Common_GetSendStatus shall return IOTHUB_CLIENT_OK and status IOTHUB_CLIENT_SEND_STATUS_IDLE if there are currently no event items to be sent or being sent.] */
+ *iotHubClientStatus = IOTHUB_CLIENT_SEND_STATUS_IDLE;
+ }
+ result = IOTHUB_CLIENT_OK;
+ }
+ return result;
+}
+
+IOTHUB_CLIENT_RESULT IoTHubTransport_MQTT_Common_SetOption(TRANSPORT_LL_HANDLE handle, const char* option, const void* value)
+{
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_021: [If any parameter is NULL then IoTHubTransport_MQTT_Common_SetOption shall return IOTHUB_CLIENT_INVALID_ARG.] */
+ IOTHUB_CLIENT_RESULT result;
+ if (
+ (handle == NULL) ||
+ (option == NULL) ||
+ (value == NULL)
+ )
+ {
+ result = IOTHUB_CLIENT_INVALID_ARG;
+ LogError("invalid parameter (NULL) passed to IoTHubTransport_MQTT_Common_SetOption.");
+ }
+ else
+ {
+ MQTTTRANSPORT_HANDLE_DATA* transport_data = (MQTTTRANSPORT_HANDLE_DATA*)handle;
+
+ IOTHUB_CREDENTIAL_TYPE cred_type = IoTHubClient_Auth_Get_Credential_Type(transport_data->authorization_module);
+
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_031: [If the option parameter is set to "logtrace" then the value shall be a bool_ptr and the value will determine if the mqtt client log is on or off.] */
+ if (strcmp(OPTION_LOG_TRACE, option) == 0)
+ {
+ transport_data->log_trace = *((bool*)value);
+ mqtt_client_set_trace(transport_data->mqttClient, transport_data->log_trace, transport_data->raw_trace);
+ result = IOTHUB_CLIENT_OK;
+ }
+ else if (strcmp("rawlogtrace", option) == 0)
+ {
+ transport_data->raw_trace = *((bool*)value);
+ mqtt_client_set_trace(transport_data->mqttClient, transport_data->log_trace, transport_data->raw_trace);
+ result = IOTHUB_CLIENT_OK;
+ }
+ else if (strcmp(OPTION_AUTO_URL_ENCODE_DECODE, option) == 0)
+ {
+ transport_data->auto_url_encode_decode = *((bool*)value);
+ result = IOTHUB_CLIENT_OK;
+ }
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_07_052: [ If the option parameter is set to "sas_token_lifetime" then the value shall be a size_t_ptr and the value will determine the mqtt sas token lifetime.] */
+ else if (strcmp(OPTION_SAS_TOKEN_LIFETIME, option) == 0)
+ {
+ size_t* sas_lifetime = (size_t*)value;
+ transport_data->option_sas_token_lifetime_secs = *sas_lifetime;
+ result = IOTHUB_CLIENT_OK;
+ }
+ else if (strcmp(OPTION_CONNECTION_TIMEOUT, option) == 0)
+ {
+ int* connection_time = (int*)value;
+ if (*connection_time != transport_data->connect_timeout_in_sec)
+ {
+ transport_data->connect_timeout_in_sec = (uint16_t)(*connection_time);
+ }
+ result = IOTHUB_CLIENT_OK;
+ }
+ else if (strcmp(OPTION_KEEP_ALIVE, option) == 0)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_036: [If the option parameter is set to "keepalive" then the value shall be a int_ptr and the value will determine the mqtt keepalive time that is set for pings.] */
+ int* keepAliveOption = (int*)value;
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_037 : [If the option parameter is set to supplied int_ptr keepalive is the same value as the existing keepalive then IoTHubTransport_MQTT_Common_SetOption shall do nothing.] */
+ if (*keepAliveOption != transport_data->keepAliveValue)
+ {
+ transport_data->keepAliveValue = (uint16_t)(*keepAliveOption);
+ if (transport_data->mqttClientStatus != MQTT_CLIENT_STATUS_NOT_CONNECTED)
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_038: [If the client is connected when the keepalive is set then IoTHubTransport_MQTT_Common_SetOption shall disconnect and reconnect with the specified keepalive value.] */
+ DisconnectFromClient(transport_data);
+ }
+ }
+ result = IOTHUB_CLIENT_OK;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_039: [If the option parameter is set to "x509certificate" then the value shall be a const char of the certificate to be used for x509.] */
+ else if ((strcmp(OPTION_X509_CERT, option) == 0) && (cred_type != IOTHUB_CREDENTIAL_TYPE_X509 && cred_type != IOTHUB_CREDENTIAL_TYPE_UNKNOWN))
+ {
+ LogError("x509certificate specified, but authentication method is not x509");
+ result = IOTHUB_CLIENT_INVALID_ARG;
+ }
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_040: [If the option parameter is set to "x509privatekey" then the value shall be a const char of the RSA Private Key to be used for x509.] */
+ else if ((strcmp(OPTION_X509_PRIVATE_KEY, option) == 0) && (cred_type != IOTHUB_CREDENTIAL_TYPE_X509 && cred_type != IOTHUB_CREDENTIAL_TYPE_UNKNOWN))
+ {
+ LogError("x509privatekey specified, but authentication method is not x509");
+ result = IOTHUB_CLIENT_INVALID_ARG;
+ }
+ else if (strcmp(OPTION_HTTP_PROXY, option) == 0)
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_001: [ 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_data->xioTransport != NULL)
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_007: [ If the underlying IO has already been created, then `IoTHubTransport_MQTT_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_IOTHUB_TRANSPORT_MQTT_COMMON_01_003: [ If `host_address` is NULL, `IoTHubTransport_MQTT_Common_SetOption` shall fail and return `IOTHUB_CLIENT_INVALID_ARG`. ]*/
+ LogError("NULL host_address in proxy options");
+ result = IOTHUB_CLIENT_INVALID_ARG;
+ }
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_006: [ If only one of `username` and `password` is NULL, `IoTHubTransport_MQTT_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_IOTHUB_TRANSPORT_MQTT_COMMON_01_002: [ 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_data->http_proxy_port = proxy_options->port;
+ if (mallocAndStrcpy_s(&copied_proxy_hostname, proxy_options->host_address) != 0)
+ {
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_004: [ If copying `host_address`, `username` or `password` fails, `IoTHubTransport_MQTT_Common_SetOption` shall fail and return `IOTHUB_CLIENT_ERROR`. ]*/
+ LogError("Cannot copy HTTP proxy hostname");
+ result = IOTHUB_CLIENT_ERROR;
+ }
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_005: [ `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_IOTHUB_TRANSPORT_MQTT_COMMON_01_004: [ If copying `host_address`, `username` or `password` fails, `IoTHubTransport_MQTT_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_IOTHUB_TRANSPORT_MQTT_COMMON_01_005: [ `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_IOTHUB_TRANSPORT_MQTT_COMMON_01_004: [ If copying `host_address`, `username` or `password` fails, `IoTHubTransport_MQTT_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_IOTHUB_TRANSPORT_MQTT_COMMON_01_009: [ When setting the proxy options succeeds any previously saved proxy options shall be freed. ]*/
+ free_proxy_data(transport_data);
+
+ transport_data->http_proxy_hostname = copied_proxy_hostname;
+ transport_data->http_proxy_username = copied_proxy_username;
+ transport_data->http_proxy_password = copied_proxy_password;
+
+ /* Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_01_008: [ If setting the `proxy_data` option suceeds, `IoTHubTransport_MQTT_Common_SetOption` shall return `IOTHUB_CLIENT_OK` ]*/
+ result = IOTHUB_CLIENT_OK;
+ }
+ }
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_039: [If the option parameter is set to "x509certificate" then the value shall be a const char of the certificate to be used for x509.] */
+ if (((strcmp(OPTION_X509_CERT, option) == 0) || (strcmp(OPTION_X509_PRIVATE_KEY, option) == 0)) && (cred_type != IOTHUB_CREDENTIAL_TYPE_X509))
+ {
+ IoTHubClient_Auth_Set_x509_Type(transport_data->authorization_module, true);
+ }
+
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_032: [IoTHubTransport_MQTT_Common_SetOption shall pass down the option to xio_setoption if the option parameter is not a known option string for the MQTT transport.] */
+ if (GetTransportProviderIfNecessary(transport_data) == 0)
+ {
+ if (xio_setoption(transport_data->xioTransport, option, value) == 0)
+ {
+ result = IOTHUB_CLIENT_OK;
+ }
+ else
+ {
+ /* Codes_SRS_IOTHUB_MQTT_TRANSPORT_07_132: [IoTHubTransport_MQTT_Common_SetOption shall return IOTHUB_CLIENT_INVALID_ARG xio_setoption fails] */
+ result = IOTHUB_CLIENT_INVALID_ARG;
+ }
+ }
+ else
+ {
+ result = IOTHUB_CLIENT_ERROR;
+ }
+ }
+ }
+ return result;
+}
+
+static bool check_module_ids_equal(const char* transportModuleId, const char* deviceModuleId)
+{
+ if ((transportModuleId != NULL) && (deviceModuleId == NULL))
+ {
+ return false;
+ }
+ else if ((transportModuleId == NULL) && (deviceModuleId != NULL))
+ {
+ return false;
+ }
+ else if ((transportModuleId == NULL) && (deviceModuleId == NULL))
+ {
+ return true;
+ }
+ else
+ {
+ return (0 == strcmp(transportModuleId, deviceModuleId));
+ }
+}
+
+IOTHUB_DEVICE_HANDLE IoTHubTransport_MQTT_Common_Register(TRANSPORT_LL_HANDLE handle, const IOTHUB_DEVICE_CONFIG* device, IOTHUB_CLIENT_CORE_LL_HANDLE iotHubClientHandle, PDLIST_ENTRY waitingToSend)
+{
+ IOTHUB_DEVICE_HANDLE result = NULL;
+ (void)iotHubClientHandle;
+
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_17_001: [ IoTHubTransport_MQTT_Common_Register shall return NULL if the TRANSPORT_LL_HANDLE is NULL.]
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_17_002: [ IoTHubTransport_MQTT_Common_Register shall return NULL if device or waitingToSend are NULL.]
+ if ((handle == NULL) || (device == NULL) || (waitingToSend == NULL))
+ {
+ LogError("IoTHubTransport_MQTT_Common_Register: handle, device or waitingToSend is NULL.");
+ result = NULL;
+ }
+ else
+ {
+ MQTTTRANSPORT_HANDLE_DATA* transport_data = (MQTTTRANSPORT_HANDLE_DATA*)handle;
+
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_03_001: [ IoTHubTransport_MQTT_Common_Register shall return NULL if deviceId, or both deviceKey and deviceSasToken are NULL.]
+ if (device->deviceId == NULL)
+ {
+ LogError("IoTHubTransport_MQTT_Common_Register: deviceId is NULL.");
+ result = NULL;
+ }
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_03_002: [ IoTHubTransport_MQTT_Common_Register shall return NULL if both deviceKey and deviceSasToken are provided.]
+ else if ((device->deviceKey != NULL) && (device->deviceSasToken != NULL))
+ {
+ LogError("IoTHubTransport_MQTT_Common_Register: Both deviceKey and deviceSasToken are defined. Only one can be used.");
+ result = NULL;
+ }
+ else
+ {
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_17_003: [ IoTHubTransport_MQTT_Common_Register shall return NULL if deviceId or deviceKey do not match the deviceId and deviceKey passed in during IoTHubTransport_MQTT_Common_Create.]
+ if (strcmp(STRING_c_str(transport_data->device_id), device->deviceId) != 0)
+ {
+ LogError("IoTHubTransport_MQTT_Common_Register: deviceId does not match.");
+ result = NULL;
+ }
+ else if (!check_module_ids_equal(STRING_c_str(transport_data->module_id), device->moduleId))
+ {
+ LogError("IoTHubTransport_MQTT_Common_Register: moduleId does not match.");
+ result = NULL;
+ }
+ else if (IoTHubClient_Auth_Get_Credential_Type(transport_data->authorization_module) == IOTHUB_CREDENTIAL_TYPE_DEVICE_KEY &&
+ (strcmp(IoTHubClient_Auth_Get_DeviceKey(transport_data->authorization_module), device->deviceKey) != 0))
+ {
+ LogError("IoTHubTransport_MQTT_Common_Register: deviceKey does not match.");
+ result = NULL;
+ }
+ else
+ {
+ if (transport_data->isRegistered == true)
+ {
+ LogError("Transport already has device registered by id: [%s]", device->deviceId);
+ result = NULL;
+ }
+ else
+ {
+ transport_data->isRegistered = true;
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_17_004: [ IoTHubTransport_MQTT_Common_Register shall return the TRANSPORT_LL_HANDLE as the IOTHUB_DEVICE_HANDLE. ]
+ result = (IOTHUB_DEVICE_HANDLE)handle;
+ }
+ }
+ }
+ }
+
+ return result;
+}
+
+void IoTHubTransport_MQTT_Common_Unregister(IOTHUB_DEVICE_HANDLE deviceHandle)
+{
+ // Codes_SRS_IOTHUB_MQTT_TRANSPORT_17_005: [ If deviceHandle is NULL `IoTHubTransport_MQTT_Common_Unregister` shall do nothing. ]
+ if (deviceHandle != NULL)
+ {
+ MQTTTRANSPORT_HANDLE_DATA* transport_data = (MQTTTRANSPORT_HANDLE_DATA*)deviceHandle;
+
+ transport_data->isRegistered = false;
+ }
+}
+
+STRING_HANDLE IoTHubTransport_MQTT_Common_GetHostname(TRANSPORT_LL_HANDLE handle)
+{
+ STRING_HANDLE result;
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_02_001: [ If handle is NULL then IoTHubTransport_MQTT_Common_GetHostname shall fail and return NULL. ]*/
+ if (handle == NULL)
+ {
+ result = NULL;
+ }
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_02_002: [ Otherwise IoTHubTransport_MQTT_Common_GetHostname shall return a non-NULL STRING_HANDLE containg the hostname. ]*/
+ else if ((result = STRING_clone(((MQTTTRANSPORT_HANDLE_DATA*)(handle))->hostAddress)) == NULL)
+ {
+ LogError("Cannot provide the target host name (STRING_clone failed).");
+ }
+
+ return result;
+}
+
+IOTHUB_CLIENT_RESULT IoTHubTransport_MQTT_Common_SendMessageDisposition(MESSAGE_CALLBACK_INFO* message_data, IOTHUBMESSAGE_DISPOSITION_RESULT disposition)
+{
+ (void)disposition;
+
+ IOTHUB_CLIENT_RESULT result;
+ if (message_data)
+ {
+ if (message_data->messageHandle)
+ {
+ IoTHubMessage_Destroy(message_data->messageHandle);
+ result = IOTHUB_CLIENT_OK;
+ }
+ else
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_10_002: [If any of the messageData fields are NULL, IoTHubTransport_MQTT_Common_SendMessageDisposition shall fail and return IOTHUB_CLIENT_ERROR. ]*/
+ LogError("message handle is NULL");
+ result = IOTHUB_CLIENT_ERROR;
+ }
+ free(message_data);
+ }
+ else
+ {
+ /*Codes_SRS_IOTHUB_MQTT_TRANSPORT_10_001: [If messageData is NULL, IoTHubTransport_MQTT_Common_SendMessageDisposition shall fail and return IOTHUB_CLIENT_ERROR. ]*/
+ LogError("message_data is NULL");
+ result = IOTHUB_CLIENT_ERROR;
+ }
+ return result;
+}
+
+
+int IoTHubTransport_MQTT_Common_Subscribe_InputQueue(IOTHUB_DEVICE_HANDLE handle)
+{
+ int result;
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ if (transport_data == NULL)
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_066: [ If parameter handle is NULL than IoTHubTransport_MQTT_Common_Subscribe_InputQueue shall return a non-zero value.]
+ LogError("Invalid handle parameter. NULL.");
+ result = __FAILURE__;
+ }
+ else if (transport_data->module_id == NULL)
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_073: [ If module ID is not set on the transpont, IoTHubTransport_MQTT_Common_Unsubscribe_InputQueue shall fail.]
+ LogError("ModuleID must be specified for input queues. NULL.");
+ result = __FAILURE__;
+ }
+ else if ((transport_data->topic_InputQueue == NULL) &&
+ (transport_data->topic_InputQueue = STRING_construct_sprintf(TOPIC_INPUT_QUEUE_NAME, STRING_c_str(transport_data->device_id), STRING_c_str(transport_data->module_id))) == NULL)
+ {
+ LogError("Failure constructing Message Topic");
+ result = __FAILURE__;
+ }
+ else
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_067: [ IoTHubTransport_MQTT_Common_Subscribe_InputQueue shall set a flag to enable mqtt_client_subscribe to be called to subscribe to the input queue Message Topic.]
+ transport_data->topics_ToSubscribe |= SUBSCRIBE_INPUT_QUEUE_TOPIC;
+ changeStateToSubscribeIfAllowed(transport_data);
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_070: [ On success IoTHubTransport_MQTT_Common_Subscribe_InputQueue shall return 0.]
+ result = 0;
+ }
+ return result;
+}
+
+void IoTHubTransport_MQTT_Common_Unsubscribe_InputQueue(IOTHUB_DEVICE_HANDLE handle)
+{
+ PMQTTTRANSPORT_HANDLE_DATA transport_data = (PMQTTTRANSPORT_HANDLE_DATA)handle;
+ if ((transport_data != NULL) && (transport_data->topic_InputQueue != NULL))
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_072: [ IoTHubTransport_MQTT_Common_Unsubscribe_InputQueue shall call mqtt_client_unsubscribe to unsubscribe the mqtt input queue message topic.]
+ const char* unsubscribe[1];
+ unsubscribe[0] = STRING_c_str(transport_data->topic_InputQueue);
+ if (mqtt_client_unsubscribe(transport_data->mqttClient, get_next_packet_id(transport_data), unsubscribe, 1) != 0)
+ {
+ LogError("Failure calling mqtt_client_unsubscribe");
+ }
+ STRING_delete(transport_data->topic_InputQueue);
+ transport_data->topic_InputQueue = NULL;
+ transport_data->topics_ToSubscribe &= ~SUBSCRIBE_INPUT_QUEUE_TOPIC;
+ }
+ else
+ {
+ // Codes_SRS_IOTHUB_TRANSPORT_MQTT_COMMON_31_071: [ If parameter handle is NULL then IoTHubTransport_MQTT_Common_Unsubscribe_InputQueue shall do nothing.]
+ LogError("Invalid argument to unsubscribe input queue (NULL).");
+ }
+}
+
+