iothub_amqp_transport - Microsoft Azure IoTHub client AMQP transport

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Microsoft Azure IoTHub client AMQP transport

Dependents: sht15_remote_monitoring RobotArmDemo iothub_client_sample_amqp iothub_client_sample_amqp ... more

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

iothubtransport_amqp_telemetry_messenger.c@50:f3a92c6c6534, 2018-03-05 (annotated)

Committer:: AzureIoTClient
Date:: Mon Mar 05 17:39:14 2018 -0800
Revision:: 50:f3a92c6c6534
Parent:: 46:c688c75b63b9
Child:: 51:269e65571b39

1.2.0

Who changed what in which revision?

User	Revision	Line number	New contents of line
AzureIoTClient	36:f78f9a56869e	1	// Copyright (c) Microsoft. All rights reserved.
AzureIoTClient	36:f78f9a56869e	2	// Licensed under the MIT license. See LICENSE file in the project root for full license information.
AzureIoTClient	36:f78f9a56869e	3
AzureIoTClient	36:f78f9a56869e	4	#include <stdlib.h>
AzureIoTClient	36:f78f9a56869e	5	#include <stdbool.h>
AzureIoTClient	36:f78f9a56869e	6	#include "azure_c_shared_utility/optimize_size.h"
AzureIoTClient	36:f78f9a56869e	7	#include "azure_c_shared_utility/crt_abstractions.h"
AzureIoTClient	36:f78f9a56869e	8	#include "azure_c_shared_utility/gballoc.h"
AzureIoTClient	36:f78f9a56869e	9	#include "azure_c_shared_utility/agenttime.h"
AzureIoTClient	36:f78f9a56869e	10	#include "azure_c_shared_utility/xlogging.h"
AzureIoTClient	36:f78f9a56869e	11	#include "azure_c_shared_utility/uniqueid.h"
AzureIoTClient	36:f78f9a56869e	12	#include "azure_c_shared_utility/singlylinkedlist.h"
AzureIoTClient	36:f78f9a56869e	13	#include "azure_uamqp_c/link.h"
AzureIoTClient	36:f78f9a56869e	14	#include "azure_uamqp_c/messaging.h"
AzureIoTClient	36:f78f9a56869e	15	#include "azure_uamqp_c/message_sender.h"
AzureIoTClient	36:f78f9a56869e	16	#include "azure_uamqp_c/message_receiver.h"
AzureIoTClient	36:f78f9a56869e	17	#include "uamqp_messaging.h"
AzureIoTClient	36:f78f9a56869e	18	#include "iothub_client_private.h"
AzureIoTClient	36:f78f9a56869e	19	#include "iothub_client_version.h"
AzureIoTClient	36:f78f9a56869e	20	#include "iothubtransport_amqp_telemetry_messenger.h"
AzureIoTClient	36:f78f9a56869e	21
AzureIoTClient	36:f78f9a56869e	22	#define RESULT_OK 0
AzureIoTClient	36:f78f9a56869e	23	#define INDEFINITE_TIME ((time_t)(-1))
AzureIoTClient	36:f78f9a56869e	24
AzureIoTClient	36:f78f9a56869e	25	#define IOTHUB_DEVICES_PATH_FMT "%s/devices/%s"
AzureIoTClient	36:f78f9a56869e	26	#define IOTHUB_EVENT_SEND_ADDRESS_FMT "amqps://%s/messages/events"
AzureIoTClient	36:f78f9a56869e	27	#define IOTHUB_MESSAGE_RECEIVE_ADDRESS_FMT "amqps://%s/messages/devicebound"
AzureIoTClient	36:f78f9a56869e	28	#define MESSAGE_SENDER_LINK_NAME_PREFIX "link-snd"
AzureIoTClient	36:f78f9a56869e	29	#define MESSAGE_SENDER_MAX_LINK_SIZE UINT64_MAX
AzureIoTClient	36:f78f9a56869e	30	#define MESSAGE_RECEIVER_LINK_NAME_PREFIX "link-rcv"
AzureIoTClient	36:f78f9a56869e	31	#define MESSAGE_RECEIVER_MAX_LINK_SIZE 65536
AzureIoTClient	36:f78f9a56869e	32	#define DEFAULT_EVENT_SEND_RETRY_LIMIT 10
AzureIoTClient	36:f78f9a56869e	33	#define DEFAULT_EVENT_SEND_TIMEOUT_SECS 600
AzureIoTClient	36:f78f9a56869e	34	#define MAX_MESSAGE_SENDER_STATE_CHANGE_TIMEOUT_SECS 300
AzureIoTClient	36:f78f9a56869e	35	#define MAX_MESSAGE_RECEIVER_STATE_CHANGE_TIMEOUT_SECS 300
AzureIoTClient	36:f78f9a56869e	36	#define UNIQUE_ID_BUFFER_SIZE 37
AzureIoTClient	36:f78f9a56869e	37	#define STRING_NULL_TERMINATOR '\0'
AzureIoTClient	41:71c01aa3df1a	38
AzureIoTClient	41:71c01aa3df1a	39	#define AMQP_BATCHING_FORMAT_CODE 0x80013700
AzureIoTClient	36:f78f9a56869e	40
AzureIoTClient	36:f78f9a56869e	41	typedef struct TELEMETRY_MESSENGER_INSTANCE_TAG
AzureIoTClient	36:f78f9a56869e	42	{
AzureIoTClient	41:71c01aa3df1a	43	STRING_HANDLE device_id;
AzureIoTClient	36:f78f9a56869e	44	STRING_HANDLE product_info;
AzureIoTClient	41:71c01aa3df1a	45	STRING_HANDLE iothub_host_fqdn;
AzureIoTClient	41:71c01aa3df1a	46	SINGLYLINKEDLIST_HANDLE waiting_to_send; // List of MESSENGER_SEND_EVENT_CALLER_INFORMATION's
AzureIoTClient	41:71c01aa3df1a	47	SINGLYLINKEDLIST_HANDLE in_progress_list; // List of MESSENGER_SEND_EVENT_TASK's
AzureIoTClient	41:71c01aa3df1a	48	TELEMETRY_MESSENGER_STATE state;
AzureIoTClient	41:71c01aa3df1a	49
AzureIoTClient	41:71c01aa3df1a	50	ON_TELEMETRY_MESSENGER_STATE_CHANGED_CALLBACK on_state_changed_callback;
AzureIoTClient	41:71c01aa3df1a	51	void* on_state_changed_context;
AzureIoTClient	36:f78f9a56869e	52
AzureIoTClient	41:71c01aa3df1a	53	bool receive_messages;
AzureIoTClient	41:71c01aa3df1a	54	ON_TELEMETRY_MESSENGER_MESSAGE_RECEIVED on_message_received_callback;
AzureIoTClient	41:71c01aa3df1a	55	void* on_message_received_context;
AzureIoTClient	36:f78f9a56869e	56
AzureIoTClient	41:71c01aa3df1a	57	SESSION_HANDLE session_handle;
AzureIoTClient	41:71c01aa3df1a	58	LINK_HANDLE sender_link;
AzureIoTClient	41:71c01aa3df1a	59	MESSAGE_SENDER_HANDLE message_sender;
AzureIoTClient	41:71c01aa3df1a	60	MESSAGE_SENDER_STATE message_sender_current_state;
AzureIoTClient	41:71c01aa3df1a	61	MESSAGE_SENDER_STATE message_sender_previous_state;
AzureIoTClient	41:71c01aa3df1a	62	LINK_HANDLE receiver_link;
AzureIoTClient	41:71c01aa3df1a	63	MESSAGE_RECEIVER_HANDLE message_receiver;
AzureIoTClient	41:71c01aa3df1a	64	MESSAGE_RECEIVER_STATE message_receiver_current_state;
AzureIoTClient	41:71c01aa3df1a	65	MESSAGE_RECEIVER_STATE message_receiver_previous_state;
AzureIoTClient	36:f78f9a56869e	66
AzureIoTClient	41:71c01aa3df1a	67	size_t event_send_retry_limit;
AzureIoTClient	41:71c01aa3df1a	68	size_t event_send_error_count;
AzureIoTClient	41:71c01aa3df1a	69	size_t event_send_timeout_secs;
AzureIoTClient	41:71c01aa3df1a	70	time_t last_message_sender_state_change_time;
AzureIoTClient	41:71c01aa3df1a	71	time_t last_message_receiver_state_change_time;
AzureIoTClient	36:f78f9a56869e	72	} TELEMETRY_MESSENGER_INSTANCE;
AzureIoTClient	36:f78f9a56869e	73
AzureIoTClient	41:71c01aa3df1a	74	// MESSENGER_SEND_EVENT_CALLER_INFORMATION corresponds to a message sent from the API, including
AzureIoTClient	41:71c01aa3df1a	75	// the message and callback information to alert caller about what happened.
AzureIoTClient	41:71c01aa3df1a	76	typedef struct MESSENGER_SEND_EVENT_CALLER_INFORMATION_TAG
AzureIoTClient	41:71c01aa3df1a	77	{
AzureIoTClient	41:71c01aa3df1a	78	IOTHUB_MESSAGE_LIST* message;
AzureIoTClient	41:71c01aa3df1a	79	ON_TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE on_event_send_complete_callback;
AzureIoTClient	41:71c01aa3df1a	80	void* context;
AzureIoTClient	41:71c01aa3df1a	81	} MESSENGER_SEND_EVENT_CALLER_INFORMATION;
AzureIoTClient	41:71c01aa3df1a	82
AzureIoTClient	41:71c01aa3df1a	83	// MESSENGER_SEND_EVENT_TASK interfaces with underlying uAMQP layer. It receives the callback
AzureIoTClient	41:71c01aa3df1a	84	// from this lower layer which is used to pass the results back to the API via the callback_list.
AzureIoTClient	36:f78f9a56869e	85	typedef struct MESSENGER_SEND_EVENT_TASK_TAG
AzureIoTClient	36:f78f9a56869e	86	{
AzureIoTClient	41:71c01aa3df1a	87	SINGLYLINKEDLIST_HANDLE callback_list; // List of MESSENGER_SEND_EVENT_CALLER_INFORMATION's
AzureIoTClient	41:71c01aa3df1a	88	time_t send_time;
AzureIoTClient	41:71c01aa3df1a	89	TELEMETRY_MESSENGER_INSTANCE *messenger;
AzureIoTClient	41:71c01aa3df1a	90	bool is_timed_out;
AzureIoTClient	36:f78f9a56869e	91	} MESSENGER_SEND_EVENT_TASK;
AzureIoTClient	36:f78f9a56869e	92
AzureIoTClient	41:71c01aa3df1a	93
AzureIoTClient	36:f78f9a56869e	94	// @brief
AzureIoTClient	36:f78f9a56869e	95	// Evaluates if the ammount of time since start_time is greater or lesser than timeout_in_secs.
AzureIoTClient	36:f78f9a56869e	96	// @param is_timed_out
AzureIoTClient	36:f78f9a56869e	97	// Set to 1 if a timeout has been reached, 0 otherwise. Not set if any failure occurs.
AzureIoTClient	36:f78f9a56869e	98	// @returns
AzureIoTClient	36:f78f9a56869e	99	// 0 if no failures occur, non-zero otherwise.
AzureIoTClient	36:f78f9a56869e	100	static int is_timeout_reached(time_t start_time, size_t timeout_in_secs, int *is_timed_out)
AzureIoTClient	36:f78f9a56869e	101	{
AzureIoTClient	41:71c01aa3df1a	102	int result;
AzureIoTClient	36:f78f9a56869e	103
AzureIoTClient	41:71c01aa3df1a	104	if (start_time == INDEFINITE_TIME)
AzureIoTClient	41:71c01aa3df1a	105	{
AzureIoTClient	41:71c01aa3df1a	106	LogError("Failed to verify timeout (start_time is INDEFINITE)");
AzureIoTClient	41:71c01aa3df1a	107	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	108	}
AzureIoTClient	41:71c01aa3df1a	109	else
AzureIoTClient	41:71c01aa3df1a	110	{
AzureIoTClient	41:71c01aa3df1a	111	time_t current_time;
AzureIoTClient	36:f78f9a56869e	112
AzureIoTClient	41:71c01aa3df1a	113	if ((current_time = get_time(NULL)) == INDEFINITE_TIME)
AzureIoTClient	41:71c01aa3df1a	114	{
AzureIoTClient	41:71c01aa3df1a	115	LogError("Failed to verify timeout (get_time failed)");
AzureIoTClient	41:71c01aa3df1a	116	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	117	}
AzureIoTClient	41:71c01aa3df1a	118	else
AzureIoTClient	41:71c01aa3df1a	119	{
AzureIoTClient	41:71c01aa3df1a	120	if (get_difftime(current_time, start_time) >= timeout_in_secs)
AzureIoTClient	41:71c01aa3df1a	121	{
AzureIoTClient	41:71c01aa3df1a	122	*is_timed_out = 1;
AzureIoTClient	41:71c01aa3df1a	123	}
AzureIoTClient	41:71c01aa3df1a	124	else
AzureIoTClient	41:71c01aa3df1a	125	{
AzureIoTClient	41:71c01aa3df1a	126	*is_timed_out = 0;
AzureIoTClient	41:71c01aa3df1a	127	}
AzureIoTClient	36:f78f9a56869e	128
AzureIoTClient	41:71c01aa3df1a	129	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	130	}
AzureIoTClient	41:71c01aa3df1a	131	}
AzureIoTClient	36:f78f9a56869e	132
AzureIoTClient	41:71c01aa3df1a	133	return result;
AzureIoTClient	36:f78f9a56869e	134	}
AzureIoTClient	36:f78f9a56869e	135
AzureIoTClient	36:f78f9a56869e	136	static STRING_HANDLE create_devices_path(STRING_HANDLE iothub_host_fqdn, STRING_HANDLE device_id)
AzureIoTClient	36:f78f9a56869e	137	{
AzureIoTClient	41:71c01aa3df1a	138	STRING_HANDLE devices_path;
AzureIoTClient	36:f78f9a56869e	139
AzureIoTClient	43:3da2d93bb955	140	if ((devices_path = STRING_new()) == NULL)
AzureIoTClient	43:3da2d93bb955	141	{
AzureIoTClient	43:3da2d93bb955	142	LogError("Failed creating devices_path (STRING_new failed)");
AzureIoTClient	43:3da2d93bb955	143	}
AzureIoTClient	43:3da2d93bb955	144	else
AzureIoTClient	41:71c01aa3df1a	145	{
AzureIoTClient	43:3da2d93bb955	146	const char* iothub_host_fqdn_char_ptr = STRING_c_str(iothub_host_fqdn);
AzureIoTClient	43:3da2d93bb955	147	const char* device_id_char_ptr = STRING_c_str(device_id);
AzureIoTClient	43:3da2d93bb955	148	if (STRING_sprintf(devices_path, IOTHUB_DEVICES_PATH_FMT, iothub_host_fqdn_char_ptr, device_id_char_ptr) != RESULT_OK)
AzureIoTClient	43:3da2d93bb955	149	{
AzureIoTClient	43:3da2d93bb955	150	STRING_delete(devices_path);
AzureIoTClient	43:3da2d93bb955	151	devices_path = NULL;
AzureIoTClient	43:3da2d93bb955	152	LogError("Failed creating devices_path (STRING_sprintf failed)");
AzureIoTClient	43:3da2d93bb955	153	}
AzureIoTClient	41:71c01aa3df1a	154	}
AzureIoTClient	36:f78f9a56869e	155
AzureIoTClient	41:71c01aa3df1a	156	return devices_path;
AzureIoTClient	36:f78f9a56869e	157	}
AzureIoTClient	36:f78f9a56869e	158
AzureIoTClient	36:f78f9a56869e	159	static STRING_HANDLE create_event_send_address(STRING_HANDLE devices_path)
AzureIoTClient	36:f78f9a56869e	160	{
AzureIoTClient	41:71c01aa3df1a	161	STRING_HANDLE event_send_address;
AzureIoTClient	36:f78f9a56869e	162
AzureIoTClient	41:71c01aa3df1a	163	if ((event_send_address = STRING_new()) == NULL)
AzureIoTClient	41:71c01aa3df1a	164	{
AzureIoTClient	41:71c01aa3df1a	165	LogError("Failed creating the event_send_address (STRING_new failed)");
AzureIoTClient	41:71c01aa3df1a	166	}
AzureIoTClient	41:71c01aa3df1a	167	else
AzureIoTClient	41:71c01aa3df1a	168	{
AzureIoTClient	41:71c01aa3df1a	169	const char* devices_path_char_ptr = STRING_c_str(devices_path);
AzureIoTClient	41:71c01aa3df1a	170	if (STRING_sprintf(event_send_address, IOTHUB_EVENT_SEND_ADDRESS_FMT, devices_path_char_ptr) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	171	{
AzureIoTClient	41:71c01aa3df1a	172	STRING_delete(event_send_address);
AzureIoTClient	41:71c01aa3df1a	173	event_send_address = NULL;
AzureIoTClient	41:71c01aa3df1a	174	LogError("Failed creating the event_send_address (STRING_sprintf failed)");
AzureIoTClient	41:71c01aa3df1a	175	}
AzureIoTClient	41:71c01aa3df1a	176	}
AzureIoTClient	36:f78f9a56869e	177
AzureIoTClient	41:71c01aa3df1a	178	return event_send_address;
AzureIoTClient	36:f78f9a56869e	179	}
AzureIoTClient	36:f78f9a56869e	180
AzureIoTClient	36:f78f9a56869e	181	static STRING_HANDLE create_event_sender_source_name(STRING_HANDLE link_name)
AzureIoTClient	36:f78f9a56869e	182	{
AzureIoTClient	41:71c01aa3df1a	183	STRING_HANDLE source_name;
AzureIoTClient	41:71c01aa3df1a	184
AzureIoTClient	41:71c01aa3df1a	185	if ((source_name = STRING_new()) == NULL)
AzureIoTClient	41:71c01aa3df1a	186	{
AzureIoTClient	41:71c01aa3df1a	187	LogError("Failed creating the source_name (STRING_new failed)");
AzureIoTClient	41:71c01aa3df1a	188	}
AzureIoTClient	41:71c01aa3df1a	189	else
AzureIoTClient	41:71c01aa3df1a	190	{
AzureIoTClient	41:71c01aa3df1a	191	const char* link_name_char_ptr = STRING_c_str(link_name);
AzureIoTClient	41:71c01aa3df1a	192	if (STRING_sprintf(source_name, "%s-source", link_name_char_ptr) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	193	{
AzureIoTClient	41:71c01aa3df1a	194	STRING_delete(source_name);
AzureIoTClient	41:71c01aa3df1a	195	source_name = NULL;
AzureIoTClient	41:71c01aa3df1a	196	LogError("Failed creating the source_name (STRING_sprintf failed)");
AzureIoTClient	41:71c01aa3df1a	197	}
AzureIoTClient	41:71c01aa3df1a	198	}
AzureIoTClient	36:f78f9a56869e	199
AzureIoTClient	41:71c01aa3df1a	200	return source_name;
AzureIoTClient	36:f78f9a56869e	201	}
AzureIoTClient	36:f78f9a56869e	202
AzureIoTClient	36:f78f9a56869e	203	static STRING_HANDLE create_message_receive_address(STRING_HANDLE devices_path)
AzureIoTClient	36:f78f9a56869e	204	{
AzureIoTClient	41:71c01aa3df1a	205	STRING_HANDLE message_receive_address;
AzureIoTClient	36:f78f9a56869e	206
AzureIoTClient	41:71c01aa3df1a	207	if ((message_receive_address = STRING_new()) == NULL)
AzureIoTClient	41:71c01aa3df1a	208	{
AzureIoTClient	41:71c01aa3df1a	209	LogError("Failed creating the message_receive_address (STRING_new failed)");
AzureIoTClient	41:71c01aa3df1a	210	}
AzureIoTClient	41:71c01aa3df1a	211	else
AzureIoTClient	41:71c01aa3df1a	212	{
AzureIoTClient	41:71c01aa3df1a	213	const char* devices_path_char_ptr = STRING_c_str(devices_path);
AzureIoTClient	41:71c01aa3df1a	214	if (STRING_sprintf(message_receive_address, IOTHUB_MESSAGE_RECEIVE_ADDRESS_FMT, devices_path_char_ptr) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	215	{
AzureIoTClient	41:71c01aa3df1a	216	STRING_delete(message_receive_address);
AzureIoTClient	41:71c01aa3df1a	217	message_receive_address = NULL;
AzureIoTClient	41:71c01aa3df1a	218	LogError("Failed creating the message_receive_address (STRING_sprintf failed)");
AzureIoTClient	41:71c01aa3df1a	219	}
AzureIoTClient	41:71c01aa3df1a	220	}
AzureIoTClient	36:f78f9a56869e	221
AzureIoTClient	41:71c01aa3df1a	222	return message_receive_address;
AzureIoTClient	36:f78f9a56869e	223	}
AzureIoTClient	36:f78f9a56869e	224
AzureIoTClient	36:f78f9a56869e	225	static STRING_HANDLE create_message_receiver_target_name(STRING_HANDLE link_name)
AzureIoTClient	36:f78f9a56869e	226	{
AzureIoTClient	41:71c01aa3df1a	227	STRING_HANDLE target_name;
AzureIoTClient	36:f78f9a56869e	228
AzureIoTClient	41:71c01aa3df1a	229	if ((target_name = STRING_new()) == NULL)
AzureIoTClient	41:71c01aa3df1a	230	{
AzureIoTClient	41:71c01aa3df1a	231	LogError("Failed creating the target_name (STRING_new failed)");
AzureIoTClient	41:71c01aa3df1a	232	}
AzureIoTClient	41:71c01aa3df1a	233	else
AzureIoTClient	41:71c01aa3df1a	234	{
AzureIoTClient	41:71c01aa3df1a	235	const char* link_name_char_ptr = STRING_c_str(link_name);
AzureIoTClient	41:71c01aa3df1a	236	if (STRING_sprintf(target_name, "%s-target", link_name_char_ptr) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	237	{
AzureIoTClient	41:71c01aa3df1a	238	STRING_delete(target_name);
AzureIoTClient	41:71c01aa3df1a	239	target_name = NULL;
AzureIoTClient	41:71c01aa3df1a	240	LogError("Failed creating the target_name (STRING_sprintf failed)");
AzureIoTClient	41:71c01aa3df1a	241	}
AzureIoTClient	41:71c01aa3df1a	242	}
AzureIoTClient	36:f78f9a56869e	243
AzureIoTClient	41:71c01aa3df1a	244	return target_name;
AzureIoTClient	36:f78f9a56869e	245	}
AzureIoTClient	36:f78f9a56869e	246
AzureIoTClient	36:f78f9a56869e	247	static STRING_HANDLE create_link_name(const char* prefix, const char* infix)
AzureIoTClient	36:f78f9a56869e	248	{
AzureIoTClient	41:71c01aa3df1a	249	char* unique_id;
AzureIoTClient	41:71c01aa3df1a	250	STRING_HANDLE tag = NULL;
AzureIoTClient	36:f78f9a56869e	251
AzureIoTClient	41:71c01aa3df1a	252	if ((unique_id = (char)malloc(sizeof(char) UNIQUE_ID_BUFFER_SIZE + 1)) == NULL)
AzureIoTClient	41:71c01aa3df1a	253	{
AzureIoTClient	41:71c01aa3df1a	254	LogError("Failed generating an unique tag (malloc failed)");
AzureIoTClient	41:71c01aa3df1a	255	}
AzureIoTClient	41:71c01aa3df1a	256	else
AzureIoTClient	41:71c01aa3df1a	257	{
AzureIoTClient	36:f78f9a56869e	258	memset(unique_id, 0, sizeof(char) * UNIQUE_ID_BUFFER_SIZE + 1);
AzureIoTClient	36:f78f9a56869e	259
AzureIoTClient	41:71c01aa3df1a	260	if (UniqueId_Generate(unique_id, UNIQUE_ID_BUFFER_SIZE) != UNIQUEID_OK)
AzureIoTClient	41:71c01aa3df1a	261	{
AzureIoTClient	41:71c01aa3df1a	262	LogError("Failed generating an unique tag (UniqueId_Generate failed)");
AzureIoTClient	41:71c01aa3df1a	263	}
AzureIoTClient	41:71c01aa3df1a	264	else if ((tag = STRING_new()) == NULL)
AzureIoTClient	41:71c01aa3df1a	265	{
AzureIoTClient	41:71c01aa3df1a	266	LogError("Failed generating an unique tag (STRING_new failed)");
AzureIoTClient	41:71c01aa3df1a	267	}
AzureIoTClient	41:71c01aa3df1a	268	else if (STRING_sprintf(tag, "%s-%s-%s", prefix, infix, unique_id) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	269	{
AzureIoTClient	41:71c01aa3df1a	270	STRING_delete(tag);
AzureIoTClient	41:71c01aa3df1a	271	tag = NULL;
AzureIoTClient	41:71c01aa3df1a	272	LogError("Failed generating an unique tag (STRING_sprintf failed)");
AzureIoTClient	41:71c01aa3df1a	273	}
AzureIoTClient	36:f78f9a56869e	274
AzureIoTClient	41:71c01aa3df1a	275	free(unique_id);
AzureIoTClient	41:71c01aa3df1a	276	}
AzureIoTClient	36:f78f9a56869e	277
AzureIoTClient	41:71c01aa3df1a	278	return tag;
AzureIoTClient	36:f78f9a56869e	279	}
AzureIoTClient	36:f78f9a56869e	280
AzureIoTClient	36:f78f9a56869e	281	static void update_messenger_state(TELEMETRY_MESSENGER_INSTANCE* instance, TELEMETRY_MESSENGER_STATE new_state)
AzureIoTClient	36:f78f9a56869e	282	{
AzureIoTClient	41:71c01aa3df1a	283	if (new_state != instance->state)
AzureIoTClient	41:71c01aa3df1a	284	{
AzureIoTClient	41:71c01aa3df1a	285	TELEMETRY_MESSENGER_STATE previous_state = instance->state;
AzureIoTClient	41:71c01aa3df1a	286	instance->state = new_state;
AzureIoTClient	36:f78f9a56869e	287
AzureIoTClient	41:71c01aa3df1a	288	if (instance->on_state_changed_callback != NULL)
AzureIoTClient	41:71c01aa3df1a	289	{
AzureIoTClient	41:71c01aa3df1a	290	instance->on_state_changed_callback(instance->on_state_changed_context, previous_state, new_state);
AzureIoTClient	41:71c01aa3df1a	291	}
AzureIoTClient	41:71c01aa3df1a	292	}
AzureIoTClient	36:f78f9a56869e	293	}
AzureIoTClient	36:f78f9a56869e	294
AzureIoTClient	36:f78f9a56869e	295	static void attach_device_client_type_to_link(LINK_HANDLE link, STRING_HANDLE product_info)
AzureIoTClient	36:f78f9a56869e	296	{
AzureIoTClient	41:71c01aa3df1a	297	fields attach_properties;
AzureIoTClient	41:71c01aa3df1a	298	AMQP_VALUE device_client_type_key_name;
AzureIoTClient	41:71c01aa3df1a	299	AMQP_VALUE device_client_type_value;
AzureIoTClient	41:71c01aa3df1a	300	int result;
AzureIoTClient	36:f78f9a56869e	301
AzureIoTClient	41:71c01aa3df1a	302	if ((attach_properties = amqpvalue_create_map()) == NULL)
AzureIoTClient	41:71c01aa3df1a	303	{
AzureIoTClient	41:71c01aa3df1a	304	LogError("Failed to create the map for device client type.");
AzureIoTClient	41:71c01aa3df1a	305	}
AzureIoTClient	41:71c01aa3df1a	306	else
AzureIoTClient	41:71c01aa3df1a	307	{
AzureIoTClient	41:71c01aa3df1a	308	if ((device_client_type_key_name = amqpvalue_create_symbol("com.microsoft:client-version")) == NULL)
AzureIoTClient	41:71c01aa3df1a	309	{
AzureIoTClient	41:71c01aa3df1a	310	LogError("Failed to create the key name for the device client type.");
AzureIoTClient	41:71c01aa3df1a	311	}
AzureIoTClient	41:71c01aa3df1a	312	else
AzureIoTClient	41:71c01aa3df1a	313	{
AzureIoTClient	41:71c01aa3df1a	314	if ((device_client_type_value = amqpvalue_create_string(STRING_c_str(product_info))) == NULL)
AzureIoTClient	41:71c01aa3df1a	315	{
AzureIoTClient	41:71c01aa3df1a	316	LogError("Failed to create the key value for the device client type.");
AzureIoTClient	41:71c01aa3df1a	317	}
AzureIoTClient	41:71c01aa3df1a	318	else
AzureIoTClient	41:71c01aa3df1a	319	{
AzureIoTClient	41:71c01aa3df1a	320	if ((result = amqpvalue_set_map_value(attach_properties, device_client_type_key_name, device_client_type_value)) != 0)
AzureIoTClient	41:71c01aa3df1a	321	{
AzureIoTClient	41:71c01aa3df1a	322	LogError("Failed to set the property map for the device client type (error code is: %d)", result);
AzureIoTClient	41:71c01aa3df1a	323	}
AzureIoTClient	41:71c01aa3df1a	324	else if ((result = link_set_attach_properties(link, attach_properties)) != 0)
AzureIoTClient	41:71c01aa3df1a	325	{
AzureIoTClient	41:71c01aa3df1a	326	LogError("Unable to attach the device client type to the link properties (error code is: %d)", result);
AzureIoTClient	41:71c01aa3df1a	327	}
AzureIoTClient	36:f78f9a56869e	328
AzureIoTClient	41:71c01aa3df1a	329	amqpvalue_destroy(device_client_type_value);
AzureIoTClient	41:71c01aa3df1a	330	}
AzureIoTClient	36:f78f9a56869e	331
AzureIoTClient	41:71c01aa3df1a	332	amqpvalue_destroy(device_client_type_key_name);
AzureIoTClient	41:71c01aa3df1a	333	}
AzureIoTClient	36:f78f9a56869e	334
AzureIoTClient	41:71c01aa3df1a	335	amqpvalue_destroy(attach_properties);
AzureIoTClient	41:71c01aa3df1a	336	}
AzureIoTClient	36:f78f9a56869e	337	}
AzureIoTClient	36:f78f9a56869e	338
AzureIoTClient	36:f78f9a56869e	339	static void destroy_event_sender(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	340	{
AzureIoTClient	41:71c01aa3df1a	341	if (instance->message_sender != NULL)
AzureIoTClient	41:71c01aa3df1a	342	{
AzureIoTClient	41:71c01aa3df1a	343	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_060: [`instance->message_sender` shall be destroyed using messagesender_destroy()]
AzureIoTClient	41:71c01aa3df1a	344	messagesender_destroy(instance->message_sender);
AzureIoTClient	41:71c01aa3df1a	345	instance->message_sender = NULL;
AzureIoTClient	41:71c01aa3df1a	346	}
AzureIoTClient	36:f78f9a56869e	347
AzureIoTClient	45:c09fac270e60	348	instance->message_sender_current_state = MESSAGE_SENDER_STATE_IDLE;
AzureIoTClient	45:c09fac270e60	349	instance->message_sender_previous_state = MESSAGE_SENDER_STATE_IDLE;
AzureIoTClient	45:c09fac270e60	350	instance->last_message_sender_state_change_time = INDEFINITE_TIME;
AzureIoTClient	45:c09fac270e60	351
AzureIoTClient	41:71c01aa3df1a	352	if (instance->sender_link != NULL)
AzureIoTClient	41:71c01aa3df1a	353	{
AzureIoTClient	41:71c01aa3df1a	354	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_063: [`instance->sender_link` shall be destroyed using link_destroy()]
AzureIoTClient	41:71c01aa3df1a	355	link_destroy(instance->sender_link);
AzureIoTClient	41:71c01aa3df1a	356	instance->sender_link = NULL;
AzureIoTClient	41:71c01aa3df1a	357	}
AzureIoTClient	36:f78f9a56869e	358	}
AzureIoTClient	36:f78f9a56869e	359
AzureIoTClient	36:f78f9a56869e	360	static void on_event_sender_state_changed_callback(void* context, MESSAGE_SENDER_STATE new_state, MESSAGE_SENDER_STATE previous_state)
AzureIoTClient	36:f78f9a56869e	361	{
AzureIoTClient	41:71c01aa3df1a	362	if (context == NULL)
AzureIoTClient	41:71c01aa3df1a	363	{
AzureIoTClient	41:71c01aa3df1a	364	LogError("on_event_sender_state_changed_callback was invoked with a NULL context; although unexpected, this failure will be ignored");
AzureIoTClient	41:71c01aa3df1a	365	}
AzureIoTClient	41:71c01aa3df1a	366	else
AzureIoTClient	41:71c01aa3df1a	367	{
AzureIoTClient	41:71c01aa3df1a	368	if (new_state != previous_state)
AzureIoTClient	41:71c01aa3df1a	369	{
AzureIoTClient	41:71c01aa3df1a	370	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)context;
AzureIoTClient	41:71c01aa3df1a	371	instance->message_sender_current_state = new_state;
AzureIoTClient	41:71c01aa3df1a	372	instance->message_sender_previous_state = previous_state;
AzureIoTClient	41:71c01aa3df1a	373	instance->last_message_sender_state_change_time = get_time(NULL);
AzureIoTClient	41:71c01aa3df1a	374	}
AzureIoTClient	41:71c01aa3df1a	375	}
AzureIoTClient	36:f78f9a56869e	376	}
AzureIoTClient	36:f78f9a56869e	377
AzureIoTClient	36:f78f9a56869e	378	static int create_event_sender(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	379	{
AzureIoTClient	41:71c01aa3df1a	380	int result;
AzureIoTClient	36:f78f9a56869e	381
AzureIoTClient	41:71c01aa3df1a	382	STRING_HANDLE link_name = NULL;
AzureIoTClient	41:71c01aa3df1a	383	STRING_HANDLE source_name = NULL;
AzureIoTClient	41:71c01aa3df1a	384	AMQP_VALUE source = NULL;
AzureIoTClient	41:71c01aa3df1a	385	AMQP_VALUE target = NULL;
AzureIoTClient	41:71c01aa3df1a	386	STRING_HANDLE devices_path = NULL;
AzureIoTClient	41:71c01aa3df1a	387	STRING_HANDLE event_send_address = NULL;
AzureIoTClient	36:f78f9a56869e	388
AzureIoTClient	41:71c01aa3df1a	389	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_033: [A variable, named `devices_path`, shall be created concatenating `instance->iothub_host_fqdn`, "/devices/" and `instance->device_id`]
AzureIoTClient	41:71c01aa3df1a	390	if ((devices_path = create_devices_path(instance->iothub_host_fqdn, instance->device_id)) == NULL)
AzureIoTClient	41:71c01aa3df1a	391	{
AzureIoTClient	41:71c01aa3df1a	392	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_034: [If `devices_path` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	393	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	394	LogError("Failed creating the message sender (failed creating the 'devices_path')");
AzureIoTClient	41:71c01aa3df1a	395	}
AzureIoTClient	41:71c01aa3df1a	396	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_035: [A variable, named `event_send_address`, shall be created concatenating "amqps://", `devices_path` and "/messages/events"]
AzureIoTClient	41:71c01aa3df1a	397	else if ((event_send_address = create_event_send_address(devices_path)) == NULL)
AzureIoTClient	41:71c01aa3df1a	398	{
AzureIoTClient	41:71c01aa3df1a	399	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_036: [If `event_send_address` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	400	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	401	LogError("Failed creating the message sender (failed creating the 'event_send_address')");
AzureIoTClient	41:71c01aa3df1a	402	}
AzureIoTClient	41:71c01aa3df1a	403	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_037: [A `link_name` variable shall be created using an unique string label per AMQP session]
AzureIoTClient	41:71c01aa3df1a	404	else if ((link_name = create_link_name(MESSAGE_SENDER_LINK_NAME_PREFIX, STRING_c_str(instance->device_id))) == NULL)
AzureIoTClient	41:71c01aa3df1a	405	{
AzureIoTClient	41:71c01aa3df1a	406	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_038: [If `link_name` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	407	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	408	LogError("Failed creating the message sender (failed creating an unique link name)");
AzureIoTClient	41:71c01aa3df1a	409	}
AzureIoTClient	41:71c01aa3df1a	410	else if ((source_name = create_event_sender_source_name(link_name)) == NULL)
AzureIoTClient	41:71c01aa3df1a	411	{
AzureIoTClient	41:71c01aa3df1a	412	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	413	LogError("Failed creating the message sender (failed creating an unique source name)");
AzureIoTClient	41:71c01aa3df1a	414	}
AzureIoTClient	41:71c01aa3df1a	415	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_039: [A `source` variable shall be created with messaging_create_source() using an unique string label per AMQP session]
AzureIoTClient	41:71c01aa3df1a	416	else if ((source = messaging_create_source(STRING_c_str(source_name))) == NULL)
AzureIoTClient	41:71c01aa3df1a	417	{
AzureIoTClient	41:71c01aa3df1a	418	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_040: [If `source` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	419	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	420	LogError("Failed creating the message sender (messaging_create_source failed)");
AzureIoTClient	41:71c01aa3df1a	421	}
AzureIoTClient	41:71c01aa3df1a	422	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_041: [A `target` variable shall be created with messaging_create_target() using `event_send_address`]
AzureIoTClient	41:71c01aa3df1a	423	else if ((target = messaging_create_target(STRING_c_str(event_send_address))) == NULL)
AzureIoTClient	41:71c01aa3df1a	424	{
AzureIoTClient	41:71c01aa3df1a	425	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_042: [If `target` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	426	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	427	LogError("Failed creating the message sender (messaging_create_target failed)");
AzureIoTClient	41:71c01aa3df1a	428	}
AzureIoTClient	41:71c01aa3df1a	429	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_043: [`instance->sender_link` shall be set using link_create(), passing `instance->session_handle`, `link_name`, "role_sender", `source` and `target` as parameters]
AzureIoTClient	41:71c01aa3df1a	430	else if ((instance->sender_link = link_create(instance->session_handle, STRING_c_str(link_name), role_sender, source, target)) == NULL)
AzureIoTClient	41:71c01aa3df1a	431	{
AzureIoTClient	41:71c01aa3df1a	432	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_044: [If link_create() fails, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	433	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	434	LogError("Failed creating the message sender (link_create failed)");
AzureIoTClient	41:71c01aa3df1a	435	}
AzureIoTClient	41:71c01aa3df1a	436	else
AzureIoTClient	41:71c01aa3df1a	437	{
AzureIoTClient	41:71c01aa3df1a	438	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_047: [`instance->sender_link` maximum message size shall be set to UINT64_MAX using link_set_max_message_size()]
AzureIoTClient	41:71c01aa3df1a	439	if (link_set_max_message_size(instance->sender_link, MESSAGE_SENDER_MAX_LINK_SIZE) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	440	{
AzureIoTClient	41:71c01aa3df1a	441	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_048: [If link_set_max_message_size() fails, it shall be logged and ignored.]
AzureIoTClient	41:71c01aa3df1a	442	LogError("Failed setting message sender link max message size.");
AzureIoTClient	41:71c01aa3df1a	443	}
AzureIoTClient	36:f78f9a56869e	444
AzureIoTClient	41:71c01aa3df1a	445	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_049: [`instance->sender_link` should have a property "com.microsoft:client-version" set as `CLIENT_DEVICE_TYPE_PREFIX/IOTHUB_SDK_VERSION`, using amqpvalue_set_map_value() and link_set_attach_properties()]
AzureIoTClient	41:71c01aa3df1a	446	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_050: [If amqpvalue_set_map_value() or link_set_attach_properties() fail, the failure shall be ignored]
AzureIoTClient	41:71c01aa3df1a	447	attach_device_client_type_to_link(instance->sender_link, instance->product_info);
AzureIoTClient	36:f78f9a56869e	448
AzureIoTClient	41:71c01aa3df1a	449	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_051: [`instance->message_sender` shall be created using messagesender_create(), passing the `instance->sender_link` and `on_event_sender_state_changed_callback`]
AzureIoTClient	41:71c01aa3df1a	450	if ((instance->message_sender = messagesender_create(instance->sender_link, on_event_sender_state_changed_callback, (void*)instance)) == NULL)
AzureIoTClient	41:71c01aa3df1a	451	{
AzureIoTClient	41:71c01aa3df1a	452	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_052: [If messagesender_create() fails, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	45:c09fac270e60	453	LogError("Failed creating the message sender (messagesender_create failed)");
AzureIoTClient	45:c09fac270e60	454	destroy_event_sender(instance);
AzureIoTClient	41:71c01aa3df1a	455	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	456	}
AzureIoTClient	41:71c01aa3df1a	457	else
AzureIoTClient	41:71c01aa3df1a	458	{
AzureIoTClient	41:71c01aa3df1a	459	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_053: [`instance->message_sender` shall be opened using messagesender_open()]
AzureIoTClient	41:71c01aa3df1a	460	if (messagesender_open(instance->message_sender) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	461	{
AzureIoTClient	41:71c01aa3df1a	462	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_054: [If messagesender_open() fails, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	45:c09fac270e60	463	LogError("Failed opening the AMQP message sender.");
AzureIoTClient	45:c09fac270e60	464	destroy_event_sender(instance);
AzureIoTClient	41:71c01aa3df1a	465	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	466	}
AzureIoTClient	41:71c01aa3df1a	467	else
AzureIoTClient	41:71c01aa3df1a	468	{
AzureIoTClient	41:71c01aa3df1a	469	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	470	}
AzureIoTClient	41:71c01aa3df1a	471	}
AzureIoTClient	41:71c01aa3df1a	472	}
AzureIoTClient	36:f78f9a56869e	473
AzureIoTClient	41:71c01aa3df1a	474	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_055: [Before returning, telemetry_messenger_do_work() shall release all the temporary memory it has allocated]
AzureIoTClient	41:71c01aa3df1a	475	if (link_name != NULL)
AzureIoTClient	41:71c01aa3df1a	476	STRING_delete(link_name);
AzureIoTClient	41:71c01aa3df1a	477	if (source_name != NULL)
AzureIoTClient	41:71c01aa3df1a	478	STRING_delete(source_name);
AzureIoTClient	41:71c01aa3df1a	479	if (source != NULL)
AzureIoTClient	41:71c01aa3df1a	480	amqpvalue_destroy(source);
AzureIoTClient	41:71c01aa3df1a	481	if (target != NULL)
AzureIoTClient	41:71c01aa3df1a	482	amqpvalue_destroy(target);
AzureIoTClient	41:71c01aa3df1a	483	if (devices_path != NULL)
AzureIoTClient	41:71c01aa3df1a	484	STRING_delete(devices_path);
AzureIoTClient	41:71c01aa3df1a	485	if (event_send_address != NULL)
AzureIoTClient	41:71c01aa3df1a	486	STRING_delete(event_send_address);
AzureIoTClient	36:f78f9a56869e	487
AzureIoTClient	41:71c01aa3df1a	488	return result;
AzureIoTClient	36:f78f9a56869e	489	}
AzureIoTClient	36:f78f9a56869e	490
AzureIoTClient	36:f78f9a56869e	491	static void destroy_message_receiver(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	492	{
AzureIoTClient	41:71c01aa3df1a	493	if (instance->message_receiver != NULL)
AzureIoTClient	41:71c01aa3df1a	494	{
AzureIoTClient	41:71c01aa3df1a	495	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_061: [`instance->message_receiver` shall be closed using messagereceiver_close()]
AzureIoTClient	41:71c01aa3df1a	496	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_093: [`instance->message_receiver` shall be closed using messagereceiver_close()]
AzureIoTClient	41:71c01aa3df1a	497	if (messagereceiver_close(instance->message_receiver) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	498	{
AzureIoTClient	41:71c01aa3df1a	499	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_094: [If messagereceiver_close() fails, it shall be logged and ignored]
AzureIoTClient	41:71c01aa3df1a	500	LogError("Failed closing the AMQP message receiver (this failure will be ignored).");
AzureIoTClient	41:71c01aa3df1a	501	}
AzureIoTClient	36:f78f9a56869e	502
AzureIoTClient	41:71c01aa3df1a	503	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_062: [`instance->message_receiver` shall be destroyed using messagereceiver_destroy()]
AzureIoTClient	41:71c01aa3df1a	504	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_095: [`instance->message_receiver` shall be destroyed using messagereceiver_destroy()]
AzureIoTClient	41:71c01aa3df1a	505	messagereceiver_destroy(instance->message_receiver);
AzureIoTClient	36:f78f9a56869e	506
AzureIoTClient	41:71c01aa3df1a	507	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_096: [`instance->message_receiver` shall be set to NULL]
AzureIoTClient	41:71c01aa3df1a	508	instance->message_receiver = NULL;
AzureIoTClient	41:71c01aa3df1a	509	}
AzureIoTClient	36:f78f9a56869e	510
AzureIoTClient	45:c09fac270e60	511	instance->message_receiver_current_state = MESSAGE_RECEIVER_STATE_IDLE;
AzureIoTClient	45:c09fac270e60	512	instance->message_receiver_previous_state = MESSAGE_RECEIVER_STATE_IDLE;
AzureIoTClient	45:c09fac270e60	513	instance->last_message_receiver_state_change_time = INDEFINITE_TIME;
AzureIoTClient	45:c09fac270e60	514
AzureIoTClient	41:71c01aa3df1a	515	if (instance->receiver_link != NULL)
AzureIoTClient	41:71c01aa3df1a	516	{
AzureIoTClient	41:71c01aa3df1a	517	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_064: [`instance->receiver_link` shall be destroyed using link_destroy()]
AzureIoTClient	41:71c01aa3df1a	518	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_097: [`instance->receiver_link` shall be destroyed using link_destroy()]
AzureIoTClient	41:71c01aa3df1a	519	link_destroy(instance->receiver_link);
AzureIoTClient	41:71c01aa3df1a	520	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_098: [`instance->receiver_link` shall be set to NULL]
AzureIoTClient	41:71c01aa3df1a	521	instance->receiver_link = NULL;
AzureIoTClient	41:71c01aa3df1a	522	}
AzureIoTClient	36:f78f9a56869e	523	}
AzureIoTClient	36:f78f9a56869e	524
AzureIoTClient	36:f78f9a56869e	525	static void on_message_receiver_state_changed_callback(const void* context, MESSAGE_RECEIVER_STATE new_state, MESSAGE_RECEIVER_STATE previous_state)
AzureIoTClient	36:f78f9a56869e	526	{
AzureIoTClient	41:71c01aa3df1a	527	if (context == NULL)
AzureIoTClient	41:71c01aa3df1a	528	{
AzureIoTClient	41:71c01aa3df1a	529	LogError("on_message_receiver_state_changed_callback was invoked with a NULL context; although unexpected, this failure will be ignored");
AzureIoTClient	41:71c01aa3df1a	530	}
AzureIoTClient	41:71c01aa3df1a	531	else
AzureIoTClient	41:71c01aa3df1a	532	{
AzureIoTClient	41:71c01aa3df1a	533	if (new_state != previous_state)
AzureIoTClient	41:71c01aa3df1a	534	{
AzureIoTClient	41:71c01aa3df1a	535	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)context;
AzureIoTClient	41:71c01aa3df1a	536	instance->message_receiver_current_state = new_state;
AzureIoTClient	41:71c01aa3df1a	537	instance->message_receiver_previous_state = previous_state;
AzureIoTClient	41:71c01aa3df1a	538	instance->last_message_receiver_state_change_time = get_time(NULL);
AzureIoTClient	41:71c01aa3df1a	539	}
AzureIoTClient	41:71c01aa3df1a	540	}
AzureIoTClient	36:f78f9a56869e	541	}
AzureIoTClient	36:f78f9a56869e	542
AzureIoTClient	36:f78f9a56869e	543	static TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO* create_message_disposition_info(TELEMETRY_MESSENGER_INSTANCE* messenger)
AzureIoTClient	36:f78f9a56869e	544	{
AzureIoTClient	41:71c01aa3df1a	545	TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO* result;
AzureIoTClient	36:f78f9a56869e	546
AzureIoTClient	41:71c01aa3df1a	547	if ((result = (TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO*)malloc(sizeof(TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO))) == NULL)
AzureIoTClient	41:71c01aa3df1a	548	{
AzureIoTClient	41:71c01aa3df1a	549	LogError("Failed creating TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO container (malloc failed)");
AzureIoTClient	41:71c01aa3df1a	550	result = NULL;
AzureIoTClient	41:71c01aa3df1a	551	}
AzureIoTClient	41:71c01aa3df1a	552	else
AzureIoTClient	41:71c01aa3df1a	553	{
AzureIoTClient	41:71c01aa3df1a	554	delivery_number message_id;
AzureIoTClient	36:f78f9a56869e	555
AzureIoTClient	41:71c01aa3df1a	556	if (messagereceiver_get_received_message_id(messenger->message_receiver, &message_id) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	557	{
AzureIoTClient	41:71c01aa3df1a	558	LogError("Failed creating TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO container (messagereceiver_get_received_message_id failed)");
AzureIoTClient	41:71c01aa3df1a	559	free(result);
AzureIoTClient	41:71c01aa3df1a	560	result = NULL;
AzureIoTClient	41:71c01aa3df1a	561	}
AzureIoTClient	41:71c01aa3df1a	562	else
AzureIoTClient	41:71c01aa3df1a	563	{
AzureIoTClient	41:71c01aa3df1a	564	const char* link_name;
AzureIoTClient	36:f78f9a56869e	565
AzureIoTClient	41:71c01aa3df1a	566	if (messagereceiver_get_link_name(messenger->message_receiver, &link_name) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	567	{
AzureIoTClient	41:71c01aa3df1a	568	LogError("Failed creating TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO container (messagereceiver_get_link_name failed)");
AzureIoTClient	41:71c01aa3df1a	569	free(result);
AzureIoTClient	41:71c01aa3df1a	570	result = NULL;
AzureIoTClient	41:71c01aa3df1a	571	}
AzureIoTClient	41:71c01aa3df1a	572	else if (mallocAndStrcpy_s(&result->source, link_name) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	573	{
AzureIoTClient	41:71c01aa3df1a	574	LogError("Failed creating TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO container (failed copying link name)");
AzureIoTClient	41:71c01aa3df1a	575	free(result);
AzureIoTClient	41:71c01aa3df1a	576	result = NULL;
AzureIoTClient	41:71c01aa3df1a	577	}
AzureIoTClient	41:71c01aa3df1a	578	else
AzureIoTClient	41:71c01aa3df1a	579	{
AzureIoTClient	41:71c01aa3df1a	580	result->message_id = message_id;
AzureIoTClient	41:71c01aa3df1a	581	}
AzureIoTClient	41:71c01aa3df1a	582	}
AzureIoTClient	41:71c01aa3df1a	583	}
AzureIoTClient	36:f78f9a56869e	584
AzureIoTClient	41:71c01aa3df1a	585	return result;
AzureIoTClient	36:f78f9a56869e	586	}
AzureIoTClient	36:f78f9a56869e	587
AzureIoTClient	36:f78f9a56869e	588	static void destroy_message_disposition_info(TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO* disposition_info)
AzureIoTClient	36:f78f9a56869e	589	{
AzureIoTClient	41:71c01aa3df1a	590	free(disposition_info->source);
AzureIoTClient	41:71c01aa3df1a	591	free(disposition_info);
AzureIoTClient	36:f78f9a56869e	592	}
AzureIoTClient	36:f78f9a56869e	593
AzureIoTClient	36:f78f9a56869e	594	static AMQP_VALUE create_uamqp_disposition_result_from(TELEMETRY_MESSENGER_DISPOSITION_RESULT disposition_result)
AzureIoTClient	36:f78f9a56869e	595	{
AzureIoTClient	41:71c01aa3df1a	596	AMQP_VALUE uamqp_disposition_result;
AzureIoTClient	36:f78f9a56869e	597
AzureIoTClient	41:71c01aa3df1a	598	if (disposition_result == TELEMETRY_MESSENGER_DISPOSITION_RESULT_NONE)
AzureIoTClient	41:71c01aa3df1a	599	{
AzureIoTClient	41:71c01aa3df1a	600	uamqp_disposition_result = NULL; // intentionally not sending an answer.
AzureIoTClient	41:71c01aa3df1a	601	}
AzureIoTClient	41:71c01aa3df1a	602	else if (disposition_result == TELEMETRY_MESSENGER_DISPOSITION_RESULT_ACCEPTED)
AzureIoTClient	41:71c01aa3df1a	603	{
AzureIoTClient	41:71c01aa3df1a	604	uamqp_disposition_result = messaging_delivery_accepted();
AzureIoTClient	41:71c01aa3df1a	605	}
AzureIoTClient	41:71c01aa3df1a	606	else if (disposition_result == TELEMETRY_MESSENGER_DISPOSITION_RESULT_RELEASED)
AzureIoTClient	41:71c01aa3df1a	607	{
AzureIoTClient	41:71c01aa3df1a	608	uamqp_disposition_result = messaging_delivery_released();
AzureIoTClient	41:71c01aa3df1a	609	}
AzureIoTClient	41:71c01aa3df1a	610	else if (disposition_result == TELEMETRY_MESSENGER_DISPOSITION_RESULT_REJECTED)
AzureIoTClient	41:71c01aa3df1a	611	{
AzureIoTClient	41:71c01aa3df1a	612	uamqp_disposition_result = messaging_delivery_rejected("Rejected by application", "Rejected by application");
AzureIoTClient	41:71c01aa3df1a	613	}
AzureIoTClient	41:71c01aa3df1a	614	else
AzureIoTClient	41:71c01aa3df1a	615	{
AzureIoTClient	41:71c01aa3df1a	616	LogError("Failed creating a disposition result for messagereceiver (result %d is not supported)", disposition_result);
AzureIoTClient	41:71c01aa3df1a	617	uamqp_disposition_result = NULL;
AzureIoTClient	41:71c01aa3df1a	618	}
AzureIoTClient	36:f78f9a56869e	619
AzureIoTClient	41:71c01aa3df1a	620	return uamqp_disposition_result;
AzureIoTClient	36:f78f9a56869e	621	}
AzureIoTClient	36:f78f9a56869e	622
AzureIoTClient	36:f78f9a56869e	623	static AMQP_VALUE on_message_received_internal_callback(const void* context, MESSAGE_HANDLE message)
AzureIoTClient	36:f78f9a56869e	624	{
AzureIoTClient	41:71c01aa3df1a	625	AMQP_VALUE result;
AzureIoTClient	41:71c01aa3df1a	626	int api_call_result;
AzureIoTClient	41:71c01aa3df1a	627	IOTHUB_MESSAGE_HANDLE iothub_message;
AzureIoTClient	36:f78f9a56869e	628
AzureIoTClient	41:71c01aa3df1a	629	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_121: [An IOTHUB_MESSAGE_HANDLE shall be obtained from MESSAGE_HANDLE using message_create_IoTHubMessage_from_uamqp_message()]
AzureIoTClient	41:71c01aa3df1a	630	if ((api_call_result = message_create_IoTHubMessage_from_uamqp_message(message, &iothub_message)) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	631	{
AzureIoTClient	41:71c01aa3df1a	632	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_122: [If message_create_IoTHubMessage_from_uamqp_message() fails, on_message_received_internal_callback shall return the result of messaging_delivery_rejected()]
AzureIoTClient	41:71c01aa3df1a	633	result = messaging_delivery_rejected("Rejected due to failure reading AMQP message", "Failed reading AMQP message");
AzureIoTClient	36:f78f9a56869e	634
AzureIoTClient	41:71c01aa3df1a	635	LogError("on_message_received_internal_callback failed (message_create_IoTHubMessage_from_uamqp_message; error = %d).", api_call_result);
AzureIoTClient	41:71c01aa3df1a	636	}
AzureIoTClient	41:71c01aa3df1a	637	else
AzureIoTClient	41:71c01aa3df1a	638	{
AzureIoTClient	41:71c01aa3df1a	639	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)context;
AzureIoTClient	41:71c01aa3df1a	640	TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO* message_disposition_info;
AzureIoTClient	36:f78f9a56869e	641
AzureIoTClient	41:71c01aa3df1a	642	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_186: [A TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO instance shall be created containing the source link name and message delivery ID]
AzureIoTClient	41:71c01aa3df1a	643	if ((message_disposition_info = create_message_disposition_info(instance)) == NULL)
AzureIoTClient	41:71c01aa3df1a	644	{
AzureIoTClient	41:71c01aa3df1a	645	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_187: [**If the TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO instance fails to be created, on_message_received_internal_callback shall return messaging_delivery_released()]
AzureIoTClient	41:71c01aa3df1a	646	LogError("on_message_received_internal_callback failed (failed creating TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO).");
AzureIoTClient	41:71c01aa3df1a	647	result = messaging_delivery_released();
AzureIoTClient	41:71c01aa3df1a	648	}
AzureIoTClient	41:71c01aa3df1a	649	else
AzureIoTClient	41:71c01aa3df1a	650	{
AzureIoTClient	41:71c01aa3df1a	651	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_123: [`instance->on_message_received_callback` shall be invoked passing the IOTHUB_MESSAGE_HANDLE and TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO instance]
AzureIoTClient	41:71c01aa3df1a	652	TELEMETRY_MESSENGER_DISPOSITION_RESULT disposition_result = instance->on_message_received_callback(iothub_message, message_disposition_info, instance->on_message_received_context);
AzureIoTClient	36:f78f9a56869e	653
AzureIoTClient	41:71c01aa3df1a	654	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_188: [The memory allocated for the TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO instance shall be released]
AzureIoTClient	41:71c01aa3df1a	655	destroy_message_disposition_info(message_disposition_info);
AzureIoTClient	36:f78f9a56869e	656
AzureIoTClient	41:71c01aa3df1a	657	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_125: [If `instance->on_message_received_callback` returns TELEMETRY_MESSENGER_DISPOSITION_RESULT_ACCEPTED, on_message_received_internal_callback shall return the result of messaging_delivery_accepted()]
AzureIoTClient	41:71c01aa3df1a	658	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_126: [If `instance->on_message_received_callback` returns TELEMETRY_MESSENGER_DISPOSITION_RESULT_RELEASED, on_message_received_internal_callback shall return the result of messaging_delivery_released()]
AzureIoTClient	41:71c01aa3df1a	659	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_127: [If `instance->on_message_received_callback` returns TELEMETRY_MESSENGER_DISPOSITION_RESULT_REJECTED, on_message_received_internal_callback shall return the result of messaging_delivery_rejected()]
AzureIoTClient	41:71c01aa3df1a	660	result = create_uamqp_disposition_result_from(disposition_result);
AzureIoTClient	41:71c01aa3df1a	661	}
AzureIoTClient	41:71c01aa3df1a	662	}
AzureIoTClient	36:f78f9a56869e	663
AzureIoTClient	41:71c01aa3df1a	664	return result;
AzureIoTClient	36:f78f9a56869e	665	}
AzureIoTClient	36:f78f9a56869e	666
AzureIoTClient	36:f78f9a56869e	667	static int create_message_receiver(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	668	{
AzureIoTClient	41:71c01aa3df1a	669	int result;
AzureIoTClient	36:f78f9a56869e	670
AzureIoTClient	41:71c01aa3df1a	671	STRING_HANDLE devices_path = NULL;
AzureIoTClient	41:71c01aa3df1a	672	STRING_HANDLE message_receive_address = NULL;
AzureIoTClient	41:71c01aa3df1a	673	STRING_HANDLE link_name = NULL;
AzureIoTClient	41:71c01aa3df1a	674	STRING_HANDLE target_name = NULL;
AzureIoTClient	41:71c01aa3df1a	675	AMQP_VALUE source = NULL;
AzureIoTClient	41:71c01aa3df1a	676	AMQP_VALUE target = NULL;
AzureIoTClient	36:f78f9a56869e	677
AzureIoTClient	41:71c01aa3df1a	678	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_068: [A variable, named `devices_path`, shall be created concatenating `instance->iothub_host_fqdn`, "/devices/" and `instance->device_id`]
AzureIoTClient	41:71c01aa3df1a	679	if ((devices_path = create_devices_path(instance->iothub_host_fqdn, instance->device_id)) == NULL)
AzureIoTClient	41:71c01aa3df1a	680	{
AzureIoTClient	41:71c01aa3df1a	681	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_069: [If `devices_path` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	682	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	683	LogError("Failed creating the message receiver (failed creating the 'devices_path')");
AzureIoTClient	41:71c01aa3df1a	684	}
AzureIoTClient	41:71c01aa3df1a	685	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_070: [A variable, named `message_receive_address`, shall be created concatenating "amqps://", `devices_path` and "/messages/devicebound"]
AzureIoTClient	41:71c01aa3df1a	686	else if ((message_receive_address = create_message_receive_address(devices_path)) == NULL)
AzureIoTClient	41:71c01aa3df1a	687	{
AzureIoTClient	41:71c01aa3df1a	688	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_071: [If `message_receive_address` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	689	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	690	LogError("Failed creating the message receiver (failed creating the 'message_receive_address')");
AzureIoTClient	41:71c01aa3df1a	691	}
AzureIoTClient	41:71c01aa3df1a	692	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_072: [A `link_name` variable shall be created using an unique string label per AMQP session]
AzureIoTClient	41:71c01aa3df1a	693	else if ((link_name = create_link_name(MESSAGE_RECEIVER_LINK_NAME_PREFIX, STRING_c_str(instance->device_id))) == NULL)
AzureIoTClient	41:71c01aa3df1a	694	{
AzureIoTClient	41:71c01aa3df1a	695	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_073: [If `link_name` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	696	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	697	LogError("Failed creating the message receiver (failed creating an unique link name)");
AzureIoTClient	41:71c01aa3df1a	698	}
AzureIoTClient	41:71c01aa3df1a	699	else if ((target_name = create_message_receiver_target_name(link_name)) == NULL)
AzureIoTClient	41:71c01aa3df1a	700	{
AzureIoTClient	41:71c01aa3df1a	701	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	702	LogError("Failed creating the message receiver (failed creating an unique target name)");
AzureIoTClient	41:71c01aa3df1a	703	}
AzureIoTClient	41:71c01aa3df1a	704	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_074: [A `target` variable shall be created with messaging_create_target() using an unique string label per AMQP session]
AzureIoTClient	41:71c01aa3df1a	705	else if ((target = messaging_create_target(STRING_c_str(target_name))) == NULL)
AzureIoTClient	41:71c01aa3df1a	706	{
AzureIoTClient	41:71c01aa3df1a	707	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_075: [If `target` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	708	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	709	LogError("Failed creating the message receiver (messaging_create_target failed)");
AzureIoTClient	41:71c01aa3df1a	710	}
AzureIoTClient	41:71c01aa3df1a	711	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_076: [A `source` variable shall be created with messaging_create_source() using `message_receive_address`]
AzureIoTClient	41:71c01aa3df1a	712	else if ((source = messaging_create_source(STRING_c_str(message_receive_address))) == NULL)
AzureIoTClient	41:71c01aa3df1a	713	{
AzureIoTClient	41:71c01aa3df1a	714	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_077: [If `source` fails to be created, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	715	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	716	LogError("Failed creating the message receiver (messaging_create_source failed)");
AzureIoTClient	41:71c01aa3df1a	717	}
AzureIoTClient	41:71c01aa3df1a	718	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_078: [`instance->receiver_link` shall be set using link_create(), passing `instance->session_handle`, `link_name`, "role_receiver", `source` and `target` as parameters]
AzureIoTClient	41:71c01aa3df1a	719	else if ((instance->receiver_link = link_create(instance->session_handle, STRING_c_str(link_name), role_receiver, source, target)) == NULL)
AzureIoTClient	41:71c01aa3df1a	720	{
AzureIoTClient	41:71c01aa3df1a	721	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_079: [If link_create() fails, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	722	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	723	LogError("Failed creating the message receiver (link_create failed)");
AzureIoTClient	41:71c01aa3df1a	724	}
AzureIoTClient	41:71c01aa3df1a	725	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_080: [`instance->receiver_link` settle mode shall be set to "receiver_settle_mode_first" using link_set_rcv_settle_mode(), ]
AzureIoTClient	41:71c01aa3df1a	726	else if (link_set_rcv_settle_mode(instance->receiver_link, receiver_settle_mode_first) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	727	{
AzureIoTClient	41:71c01aa3df1a	728	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_081: [If link_set_rcv_settle_mode() fails, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	729	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	730	LogError("Failed creating the message receiver (link_set_rcv_settle_mode failed)");
AzureIoTClient	41:71c01aa3df1a	731	}
AzureIoTClient	41:71c01aa3df1a	732	else
AzureIoTClient	41:71c01aa3df1a	733	{
AzureIoTClient	41:71c01aa3df1a	734	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_082: [`instance->receiver_link` maximum message size shall be set to 65536 using link_set_max_message_size()]
AzureIoTClient	41:71c01aa3df1a	735	if (link_set_max_message_size(instance->receiver_link, MESSAGE_RECEIVER_MAX_LINK_SIZE) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	736	{
AzureIoTClient	41:71c01aa3df1a	737	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_083: [If link_set_max_message_size() fails, it shall be logged and ignored.]
AzureIoTClient	41:71c01aa3df1a	738	LogError("Failed setting message receiver link max message size.");
AzureIoTClient	41:71c01aa3df1a	739	}
AzureIoTClient	36:f78f9a56869e	740
AzureIoTClient	41:71c01aa3df1a	741	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_084: [`instance->receiver_link` should have a property "com.microsoft:client-version" set as `CLIENT_DEVICE_TYPE_PREFIX/IOTHUB_SDK_VERSION`, using amqpvalue_set_map_value() and link_set_attach_properties()]
AzureIoTClient	41:71c01aa3df1a	742	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_085: [If amqpvalue_set_map_value() or link_set_attach_properties() fail, the failure shall be ignored]
AzureIoTClient	41:71c01aa3df1a	743	attach_device_client_type_to_link(instance->receiver_link, instance->product_info);
AzureIoTClient	36:f78f9a56869e	744
AzureIoTClient	41:71c01aa3df1a	745	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_086: [`instance->message_receiver` shall be created using messagereceiver_create(), passing the `instance->receiver_link` and `on_messagereceiver_state_changed_callback`]
AzureIoTClient	41:71c01aa3df1a	746	if ((instance->message_receiver = messagereceiver_create(instance->receiver_link, on_message_receiver_state_changed_callback, (void*)instance)) == NULL)
AzureIoTClient	41:71c01aa3df1a	747	{
AzureIoTClient	41:71c01aa3df1a	748	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_087: [If messagereceiver_create() fails, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	45:c09fac270e60	749	LogError("Failed creating the message receiver (messagereceiver_create failed)");
AzureIoTClient	45:c09fac270e60	750	destroy_message_receiver(instance);
AzureIoTClient	41:71c01aa3df1a	751	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	752	}
AzureIoTClient	41:71c01aa3df1a	753	else
AzureIoTClient	41:71c01aa3df1a	754	{
AzureIoTClient	41:71c01aa3df1a	755	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_088: [`instance->message_receiver` shall be opened using messagereceiver_open(), passing `on_message_received_internal_callback`]
AzureIoTClient	41:71c01aa3df1a	756	if (messagereceiver_open(instance->message_receiver, on_message_received_internal_callback, (void*)instance) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	757	{
AzureIoTClient	41:71c01aa3df1a	758	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_089: [If messagereceiver_open() fails, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	45:c09fac270e60	759	LogError("Failed opening the AMQP message receiver.");
AzureIoTClient	45:c09fac270e60	760	destroy_message_receiver(instance);
AzureIoTClient	41:71c01aa3df1a	761	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	762	}
AzureIoTClient	41:71c01aa3df1a	763	else
AzureIoTClient	41:71c01aa3df1a	764	{
AzureIoTClient	41:71c01aa3df1a	765	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	766	}
AzureIoTClient	41:71c01aa3df1a	767	}
AzureIoTClient	41:71c01aa3df1a	768	}
AzureIoTClient	36:f78f9a56869e	769
AzureIoTClient	41:71c01aa3df1a	770	if (devices_path != NULL)
AzureIoTClient	41:71c01aa3df1a	771	STRING_delete(devices_path);
AzureIoTClient	41:71c01aa3df1a	772	if (message_receive_address != NULL)
AzureIoTClient	41:71c01aa3df1a	773	STRING_delete(message_receive_address);
AzureIoTClient	41:71c01aa3df1a	774	if (link_name != NULL)
AzureIoTClient	41:71c01aa3df1a	775	STRING_delete(link_name);
AzureIoTClient	41:71c01aa3df1a	776	if (target_name != NULL)
AzureIoTClient	41:71c01aa3df1a	777	STRING_delete(target_name);
AzureIoTClient	41:71c01aa3df1a	778	if (source != NULL)
AzureIoTClient	41:71c01aa3df1a	779	amqpvalue_destroy(source);
AzureIoTClient	41:71c01aa3df1a	780	if (target != NULL)
AzureIoTClient	41:71c01aa3df1a	781	amqpvalue_destroy(target);
AzureIoTClient	36:f78f9a56869e	782
AzureIoTClient	41:71c01aa3df1a	783	return result;
AzureIoTClient	36:f78f9a56869e	784	}
AzureIoTClient	36:f78f9a56869e	785
AzureIoTClient	36:f78f9a56869e	786	static int move_event_to_in_progress_list(MESSENGER_SEND_EVENT_TASK* task)
AzureIoTClient	36:f78f9a56869e	787	{
AzureIoTClient	41:71c01aa3df1a	788	int result;
AzureIoTClient	36:f78f9a56869e	789
AzureIoTClient	41:71c01aa3df1a	790	if (singlylinkedlist_add(task->messenger->in_progress_list, (void*)task) == NULL)
AzureIoTClient	41:71c01aa3df1a	791	{
AzureIoTClient	41:71c01aa3df1a	792	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	793	LogError("Failed moving event to in_progress list (singlylinkedlist_add failed)");
AzureIoTClient	41:71c01aa3df1a	794	}
AzureIoTClient	41:71c01aa3df1a	795	else
AzureIoTClient	41:71c01aa3df1a	796	{
AzureIoTClient	41:71c01aa3df1a	797	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	798	}
AzureIoTClient	36:f78f9a56869e	799
AzureIoTClient	41:71c01aa3df1a	800	return result;
AzureIoTClient	36:f78f9a56869e	801	}
AzureIoTClient	36:f78f9a56869e	802
AzureIoTClient	36:f78f9a56869e	803	static bool find_MESSENGER_SEND_EVENT_TASK_on_list(LIST_ITEM_HANDLE list_item, const void* match_context)
AzureIoTClient	36:f78f9a56869e	804	{
AzureIoTClient	41:71c01aa3df1a	805	return (list_item != NULL && singlylinkedlist_item_get_value(list_item) == match_context);
AzureIoTClient	36:f78f9a56869e	806	}
AzureIoTClient	36:f78f9a56869e	807
AzureIoTClient	36:f78f9a56869e	808	static void remove_event_from_in_progress_list(MESSENGER_SEND_EVENT_TASK *task)
AzureIoTClient	36:f78f9a56869e	809	{
AzureIoTClient	41:71c01aa3df1a	810	LIST_ITEM_HANDLE list_item = singlylinkedlist_find(task->messenger->in_progress_list, find_MESSENGER_SEND_EVENT_TASK_on_list, (void*)task);
AzureIoTClient	36:f78f9a56869e	811
AzureIoTClient	41:71c01aa3df1a	812	if (list_item != NULL)
AzureIoTClient	41:71c01aa3df1a	813	{
AzureIoTClient	41:71c01aa3df1a	814	if (singlylinkedlist_remove(task->messenger->in_progress_list, list_item) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	815	{
AzureIoTClient	41:71c01aa3df1a	816	LogError("Failed removing event from in_progress list (singlylinkedlist_remove failed)");
AzureIoTClient	41:71c01aa3df1a	817	}
AzureIoTClient	41:71c01aa3df1a	818	}
AzureIoTClient	36:f78f9a56869e	819	}
AzureIoTClient	36:f78f9a56869e	820
AzureIoTClient	36:f78f9a56869e	821	static int copy_events_to_list(SINGLYLINKEDLIST_HANDLE from_list, SINGLYLINKEDLIST_HANDLE to_list)
AzureIoTClient	36:f78f9a56869e	822	{
AzureIoTClient	41:71c01aa3df1a	823	int result;
AzureIoTClient	41:71c01aa3df1a	824	LIST_ITEM_HANDLE list_item;
AzureIoTClient	41:71c01aa3df1a	825
AzureIoTClient	41:71c01aa3df1a	826	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	827	list_item = singlylinkedlist_get_head_item(from_list);
AzureIoTClient	41:71c01aa3df1a	828
AzureIoTClient	41:71c01aa3df1a	829	while (list_item != NULL)
AzureIoTClient	41:71c01aa3df1a	830	{
AzureIoTClient	41:71c01aa3df1a	831	MESSENGER_SEND_EVENT_TASK task = (MESSENGER_SEND_EVENT_TASK)singlylinkedlist_item_get_value(list_item);
AzureIoTClient	36:f78f9a56869e	832
AzureIoTClient	41:71c01aa3df1a	833	if (singlylinkedlist_add(to_list, task) == NULL)
AzureIoTClient	41:71c01aa3df1a	834	{
AzureIoTClient	41:71c01aa3df1a	835	LogError("Failed copying event to destination list (singlylinkedlist_add failed)");
AzureIoTClient	41:71c01aa3df1a	836	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	837	break;
AzureIoTClient	41:71c01aa3df1a	838	}
AzureIoTClient	41:71c01aa3df1a	839	else
AzureIoTClient	41:71c01aa3df1a	840	{
AzureIoTClient	41:71c01aa3df1a	841	list_item = singlylinkedlist_get_next_item(list_item);
AzureIoTClient	41:71c01aa3df1a	842	}
AzureIoTClient	41:71c01aa3df1a	843	}
AzureIoTClient	36:f78f9a56869e	844
AzureIoTClient	41:71c01aa3df1a	845	return result;
AzureIoTClient	41:71c01aa3df1a	846	}
AzureIoTClient	41:71c01aa3df1a	847
AzureIoTClient	41:71c01aa3df1a	848	static int copy_events_from_in_progress_to_waiting_list(TELEMETRY_MESSENGER_INSTANCE* instance, SINGLYLINKEDLIST_HANDLE to_list)
AzureIoTClient	41:71c01aa3df1a	849	{
AzureIoTClient	41:71c01aa3df1a	850	int result;
AzureIoTClient	41:71c01aa3df1a	851	LIST_ITEM_HANDLE list_task_item;
AzureIoTClient	36:f78f9a56869e	852
AzureIoTClient	41:71c01aa3df1a	853	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	854	list_task_item = singlylinkedlist_get_head_item(instance->in_progress_list);
AzureIoTClient	36:f78f9a56869e	855
AzureIoTClient	41:71c01aa3df1a	856	while (list_task_item != NULL)
AzureIoTClient	41:71c01aa3df1a	857	{
AzureIoTClient	41:71c01aa3df1a	858	MESSENGER_SEND_EVENT_TASK* task = (MESSENGER_SEND_EVENT_TASK*)singlylinkedlist_item_get_value(list_task_item);
AzureIoTClient	41:71c01aa3df1a	859
AzureIoTClient	41:71c01aa3df1a	860	LIST_ITEM_HANDLE list_caller_item;
AzureIoTClient	41:71c01aa3df1a	861
AzureIoTClient	41:71c01aa3df1a	862	list_caller_item = singlylinkedlist_get_head_item(task->callback_list);
AzureIoTClient	41:71c01aa3df1a	863
AzureIoTClient	41:71c01aa3df1a	864	while (list_caller_item != NULL)
AzureIoTClient	41:71c01aa3df1a	865	{
AzureIoTClient	41:71c01aa3df1a	866	MESSENGER_SEND_EVENT_CALLER_INFORMATION* caller_information = (MESSENGER_SEND_EVENT_CALLER_INFORMATION*)singlylinkedlist_item_get_value(list_caller_item);
AzureIoTClient	41:71c01aa3df1a	867
AzureIoTClient	41:71c01aa3df1a	868	if (singlylinkedlist_add(to_list, caller_information) == NULL)
AzureIoTClient	41:71c01aa3df1a	869	{
AzureIoTClient	41:71c01aa3df1a	870	LogError("Failed copying event to destination list (singlylinkedlist_add failed)");
AzureIoTClient	41:71c01aa3df1a	871	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	872	break;
AzureIoTClient	41:71c01aa3df1a	873	}
AzureIoTClient	41:71c01aa3df1a	874
AzureIoTClient	41:71c01aa3df1a	875	list_caller_item = singlylinkedlist_get_next_item(list_caller_item);
AzureIoTClient	41:71c01aa3df1a	876	}
AzureIoTClient	41:71c01aa3df1a	877
AzureIoTClient	41:71c01aa3df1a	878	list_task_item = singlylinkedlist_get_next_item(list_task_item);
AzureIoTClient	41:71c01aa3df1a	879	}
AzureIoTClient	41:71c01aa3df1a	880
AzureIoTClient	41:71c01aa3df1a	881	return result;
AzureIoTClient	36:f78f9a56869e	882	}
AzureIoTClient	36:f78f9a56869e	883
AzureIoTClient	41:71c01aa3df1a	884
AzureIoTClient	36:f78f9a56869e	885	static int move_events_to_wait_to_send_list(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	886	{
AzureIoTClient	41:71c01aa3df1a	887	int result;
AzureIoTClient	41:71c01aa3df1a	888	LIST_ITEM_HANDLE list_item;
AzureIoTClient	41:71c01aa3df1a	889
AzureIoTClient	41:71c01aa3df1a	890	if ((list_item = singlylinkedlist_get_head_item(instance->in_progress_list)) == NULL)
AzureIoTClient	41:71c01aa3df1a	891	{
AzureIoTClient	41:71c01aa3df1a	892	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	893	}
AzureIoTClient	41:71c01aa3df1a	894	else
AzureIoTClient	41:71c01aa3df1a	895	{
AzureIoTClient	41:71c01aa3df1a	896	SINGLYLINKEDLIST_HANDLE new_wait_to_send_list;
AzureIoTClient	36:f78f9a56869e	897
AzureIoTClient	41:71c01aa3df1a	898	if ((new_wait_to_send_list = singlylinkedlist_create()) == NULL)
AzureIoTClient	41:71c01aa3df1a	899	{
AzureIoTClient	41:71c01aa3df1a	900	LogError("Failed moving events back to wait_to_send list (singlylinkedlist_create failed to create new wait_to_send_list)");
AzureIoTClient	41:71c01aa3df1a	901	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	902	}
AzureIoTClient	41:71c01aa3df1a	903	else
AzureIoTClient	41:71c01aa3df1a	904	{
AzureIoTClient	41:71c01aa3df1a	905	SINGLYLINKEDLIST_HANDLE new_in_progress_list;
AzureIoTClient	41:71c01aa3df1a	906
AzureIoTClient	41:71c01aa3df1a	907	if (copy_events_from_in_progress_to_waiting_list(instance, new_wait_to_send_list) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	908	{
AzureIoTClient	41:71c01aa3df1a	909	LogError("Failed moving events back to wait_to_send list (failed adding in_progress_list items to new_wait_to_send_list)");
AzureIoTClient	41:71c01aa3df1a	910	singlylinkedlist_destroy(new_wait_to_send_list);
AzureIoTClient	41:71c01aa3df1a	911	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	912	}
AzureIoTClient	41:71c01aa3df1a	913	else if (copy_events_to_list(instance->waiting_to_send, new_wait_to_send_list) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	914	{
AzureIoTClient	41:71c01aa3df1a	915	LogError("Failed moving events back to wait_to_send list (failed adding wait_to_send items to new_wait_to_send_list)");
AzureIoTClient	41:71c01aa3df1a	916	singlylinkedlist_destroy(new_wait_to_send_list);
AzureIoTClient	41:71c01aa3df1a	917	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	918	}
AzureIoTClient	41:71c01aa3df1a	919	else if ((new_in_progress_list = singlylinkedlist_create()) == NULL)
AzureIoTClient	41:71c01aa3df1a	920	{
AzureIoTClient	41:71c01aa3df1a	921	LogError("Failed moving events back to wait_to_send list (singlylinkedlist_create failed to create new in_progress_list)");
AzureIoTClient	41:71c01aa3df1a	922	singlylinkedlist_destroy(new_wait_to_send_list);
AzureIoTClient	41:71c01aa3df1a	923	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	924	}
AzureIoTClient	41:71c01aa3df1a	925	else
AzureIoTClient	41:71c01aa3df1a	926	{
AzureIoTClient	41:71c01aa3df1a	927	singlylinkedlist_destroy(instance->waiting_to_send);
AzureIoTClient	41:71c01aa3df1a	928	singlylinkedlist_destroy(instance->in_progress_list);
AzureIoTClient	41:71c01aa3df1a	929	instance->waiting_to_send = new_wait_to_send_list;
AzureIoTClient	41:71c01aa3df1a	930	instance->in_progress_list = new_in_progress_list;
AzureIoTClient	41:71c01aa3df1a	931	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	932	}
AzureIoTClient	41:71c01aa3df1a	933	}
AzureIoTClient	41:71c01aa3df1a	934	}
AzureIoTClient	41:71c01aa3df1a	935
AzureIoTClient	41:71c01aa3df1a	936	return result;
AzureIoTClient	41:71c01aa3df1a	937	}
AzureIoTClient	41:71c01aa3df1a	938
AzureIoTClient	41:71c01aa3df1a	939	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_201: [Freeing a `task` will free callback items associated with it and free the data itself]
AzureIoTClient	41:71c01aa3df1a	940	static void free_task(MESSENGER_SEND_EVENT_TASK* task)
AzureIoTClient	41:71c01aa3df1a	941	{
AzureIoTClient	41:71c01aa3df1a	942	LIST_ITEM_HANDLE list_node;
AzureIoTClient	36:f78f9a56869e	943
AzureIoTClient	41:71c01aa3df1a	944	if (NULL != task->callback_list)
AzureIoTClient	41:71c01aa3df1a	945	{
AzureIoTClient	41:71c01aa3df1a	946	while ((list_node = singlylinkedlist_get_head_item(task->callback_list)) != NULL)
AzureIoTClient	41:71c01aa3df1a	947	{
AzureIoTClient	41:71c01aa3df1a	948	MESSENGER_SEND_EVENT_CALLER_INFORMATION* caller_info = (MESSENGER_SEND_EVENT_CALLER_INFORMATION*)singlylinkedlist_item_get_value(list_node);
AzureIoTClient	41:71c01aa3df1a	949	(void)singlylinkedlist_remove(task->callback_list, list_node);
AzureIoTClient	41:71c01aa3df1a	950	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	951	}
AzureIoTClient	41:71c01aa3df1a	952	singlylinkedlist_destroy(task->callback_list);
AzureIoTClient	41:71c01aa3df1a	953	}
AzureIoTClient	41:71c01aa3df1a	954
AzureIoTClient	41:71c01aa3df1a	955	free(task);
AzureIoTClient	41:71c01aa3df1a	956	}
AzureIoTClient	41:71c01aa3df1a	957
AzureIoTClient	41:71c01aa3df1a	958	static MESSENGER_SEND_EVENT_TASK* create_task(TELEMETRY_MESSENGER_INSTANCE *messenger)
AzureIoTClient	41:71c01aa3df1a	959	{
AzureIoTClient	41:71c01aa3df1a	960	MESSENGER_SEND_EVENT_TASK* task = NULL;
AzureIoTClient	36:f78f9a56869e	961
AzureIoTClient	41:71c01aa3df1a	962	if (NULL == (task = (MESSENGER_SEND_EVENT_TASK *)malloc(sizeof(MESSENGER_SEND_EVENT_TASK))))
AzureIoTClient	41:71c01aa3df1a	963	{
AzureIoTClient	41:71c01aa3df1a	964	LogError("malloc of MESSENGER_SEND_EVENT_TASK failed");
AzureIoTClient	41:71c01aa3df1a	965	}
AzureIoTClient	41:71c01aa3df1a	966	else
AzureIoTClient	41:71c01aa3df1a	967	{
AzureIoTClient	41:71c01aa3df1a	968	memset(task, 0, sizeof(*task ));
AzureIoTClient	41:71c01aa3df1a	969	task->messenger = messenger;
AzureIoTClient	41:71c01aa3df1a	970	task->send_time = INDEFINITE_TIME;
AzureIoTClient	41:71c01aa3df1a	971	if (NULL == (task->callback_list = singlylinkedlist_create()))
AzureIoTClient	41:71c01aa3df1a	972	{
AzureIoTClient	41:71c01aa3df1a	973	LogError("singlylinkedlist_create failed to create callback_list");
AzureIoTClient	41:71c01aa3df1a	974	free_task(task);
AzureIoTClient	41:71c01aa3df1a	975	task = NULL;
AzureIoTClient	41:71c01aa3df1a	976	}
AzureIoTClient	41:71c01aa3df1a	977	else if (RESULT_OK != move_event_to_in_progress_list(task))
AzureIoTClient	41:71c01aa3df1a	978	{
AzureIoTClient	41:71c01aa3df1a	979	LogError("move_event_to_in_progress_list failed");
AzureIoTClient	41:71c01aa3df1a	980	free_task(task);
AzureIoTClient	41:71c01aa3df1a	981	task = NULL;
AzureIoTClient	41:71c01aa3df1a	982	}
AzureIoTClient	41:71c01aa3df1a	983	}
AzureIoTClient	41:71c01aa3df1a	984	return task;
AzureIoTClient	41:71c01aa3df1a	985	}
AzureIoTClient	41:71c01aa3df1a	986
AzureIoTClient	41:71c01aa3df1a	987
AzureIoTClient	41:71c01aa3df1a	988
AzureIoTClient	41:71c01aa3df1a	989	static void invoke_callback(const void* item, const void* action_context, bool* continue_processing)
AzureIoTClient	41:71c01aa3df1a	990	{
AzureIoTClient	41:71c01aa3df1a	991	MESSENGER_SEND_EVENT_CALLER_INFORMATION caller_info = (MESSENGER_SEND_EVENT_CALLER_INFORMATION)item;
AzureIoTClient	41:71c01aa3df1a	992
AzureIoTClient	41:71c01aa3df1a	993	if (NULL != caller_info->on_event_send_complete_callback)
AzureIoTClient	41:71c01aa3df1a	994	{
AzureIoTClient	41:71c01aa3df1a	995	#pragma warning(push)
AzureIoTClient	41:71c01aa3df1a	996	#pragma warning(disable:4305) // Allow typecasting to smaller type on 64 bit systems, since we control ultimate caller.
AzureIoTClient	41:71c01aa3df1a	997	TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT messenger_send_result = (TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT)action_context;
AzureIoTClient	41:71c01aa3df1a	998	#pragma warning(pop)
AzureIoTClient	41:71c01aa3df1a	999	caller_info->on_event_send_complete_callback(caller_info->message, messenger_send_result, caller_info->context);
AzureIoTClient	41:71c01aa3df1a	1000	}
AzureIoTClient	41:71c01aa3df1a	1001	*continue_processing = true;
AzureIoTClient	36:f78f9a56869e	1002	}
AzureIoTClient	36:f78f9a56869e	1003
AzureIoTClient	36:f78f9a56869e	1004	static void internal_on_event_send_complete_callback(void* context, MESSAGE_SEND_RESULT send_result)
AzureIoTClient	36:f78f9a56869e	1005	{
AzureIoTClient	41:71c01aa3df1a	1006	if (context != NULL)
AzureIoTClient	41:71c01aa3df1a	1007	{
AzureIoTClient	41:71c01aa3df1a	1008	MESSENGER_SEND_EVENT_TASK* task = (MESSENGER_SEND_EVENT_TASK*)context;
AzureIoTClient	41:71c01aa3df1a	1009
AzureIoTClient	41:71c01aa3df1a	1010	if (task->messenger->message_sender_current_state != MESSAGE_SENDER_STATE_ERROR)
AzureIoTClient	41:71c01aa3df1a	1011	{
AzureIoTClient	41:71c01aa3df1a	1012	if (task->is_timed_out == false)
AzureIoTClient	41:71c01aa3df1a	1013	{
AzureIoTClient	41:71c01aa3df1a	1014	TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT messenger_send_result;
AzureIoTClient	36:f78f9a56869e	1015
AzureIoTClient	41:71c01aa3df1a	1016	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_189: [If no failure occurs, `on_event_send_complete_callback` shall be invoked with result TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_OK for all callers associated with this task]
AzureIoTClient	41:71c01aa3df1a	1017	if (send_result == MESSAGE_SEND_OK)
AzureIoTClient	41:71c01aa3df1a	1018	{
AzureIoTClient	41:71c01aa3df1a	1019	messenger_send_result = TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1020	}
AzureIoTClient	41:71c01aa3df1a	1021	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_190: [If a failure occured, `on_event_send_complete_callback` shall be invoked with result TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING for all callers associated with this task]
AzureIoTClient	41:71c01aa3df1a	1022	else
AzureIoTClient	41:71c01aa3df1a	1023	{
AzureIoTClient	41:71c01aa3df1a	1024	messenger_send_result = TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING;
AzureIoTClient	41:71c01aa3df1a	1025	}
AzureIoTClient	41:71c01aa3df1a	1026
AzureIoTClient	41:71c01aa3df1a	1027	// Initially typecast to a size_t to avoid 64 bit compiler warnings on casting of void* to larger type.
AzureIoTClient	41:71c01aa3df1a	1028	singlylinkedlist_foreach(task->callback_list, invoke_callback, (void*)((size_t)messenger_send_result));
AzureIoTClient	41:71c01aa3df1a	1029	}
AzureIoTClient	41:71c01aa3df1a	1030	else
AzureIoTClient	41:71c01aa3df1a	1031	{
AzureIoTClient	41:71c01aa3df1a	1032	LogInfo("messenger on_event_send_complete_callback invoked for timed out event %p; not firing upper layer callback.", task);
AzureIoTClient	41:71c01aa3df1a	1033	}
AzureIoTClient	36:f78f9a56869e	1034
AzureIoTClient	41:71c01aa3df1a	1035	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_128: [`task` shall be removed from `instance->in_progress_list`]
AzureIoTClient	41:71c01aa3df1a	1036	remove_event_from_in_progress_list(task);
AzureIoTClient	41:71c01aa3df1a	1037
AzureIoTClient	41:71c01aa3df1a	1038	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_130: [`task` shall be destroyed()]
AzureIoTClient	41:71c01aa3df1a	1039	free_task(task);
AzureIoTClient	41:71c01aa3df1a	1040	}
AzureIoTClient	41:71c01aa3df1a	1041	}
AzureIoTClient	41:71c01aa3df1a	1042	}
AzureIoTClient	41:71c01aa3df1a	1043
AzureIoTClient	41:71c01aa3df1a	1044	static MESSENGER_SEND_EVENT_CALLER_INFORMATION* get_next_caller_message_to_send(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	41:71c01aa3df1a	1045	{
AzureIoTClient	41:71c01aa3df1a	1046	MESSENGER_SEND_EVENT_CALLER_INFORMATION* caller_info;
AzureIoTClient	41:71c01aa3df1a	1047	LIST_ITEM_HANDLE list_item;
AzureIoTClient	36:f78f9a56869e	1048
AzureIoTClient	41:71c01aa3df1a	1049	if ((list_item = singlylinkedlist_get_head_item(instance->waiting_to_send)) == NULL)
AzureIoTClient	41:71c01aa3df1a	1050	{
AzureIoTClient	41:71c01aa3df1a	1051	caller_info = NULL;
AzureIoTClient	41:71c01aa3df1a	1052	}
AzureIoTClient	41:71c01aa3df1a	1053	else
AzureIoTClient	41:71c01aa3df1a	1054	{
AzureIoTClient	41:71c01aa3df1a	1055	caller_info = (MESSENGER_SEND_EVENT_CALLER_INFORMATION*)singlylinkedlist_item_get_value(list_item);
AzureIoTClient	36:f78f9a56869e	1056
AzureIoTClient	41:71c01aa3df1a	1057	if (singlylinkedlist_remove(instance->waiting_to_send, list_item) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1058	{
AzureIoTClient	41:71c01aa3df1a	1059	LogError("Failed removing item from waiting_to_send list (singlylinkedlist_remove failed)");
AzureIoTClient	41:71c01aa3df1a	1060	}
AzureIoTClient	41:71c01aa3df1a	1061	}
AzureIoTClient	36:f78f9a56869e	1062
AzureIoTClient	41:71c01aa3df1a	1063	return caller_info;
AzureIoTClient	36:f78f9a56869e	1064	}
AzureIoTClient	36:f78f9a56869e	1065
AzureIoTClient	41:71c01aa3df1a	1066	typedef struct SEND_PENDING_EVENTS_STATE_TAG
AzureIoTClient	41:71c01aa3df1a	1067	{
AzureIoTClient	41:71c01aa3df1a	1068	MESSENGER_SEND_EVENT_TASK* task;
AzureIoTClient	41:71c01aa3df1a	1069	MESSAGE_HANDLE message_batch_container;
AzureIoTClient	41:71c01aa3df1a	1070	uint64_t bytes_pending;
AzureIoTClient	41:71c01aa3df1a	1071	} SEND_PENDING_EVENTS_STATE;
AzureIoTClient	41:71c01aa3df1a	1072
AzureIoTClient	41:71c01aa3df1a	1073
AzureIoTClient	41:71c01aa3df1a	1074	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_191: [Creates an AMQP message, sets it to be batch mode, and creates an associated task for its callbacks. Errors cause the send events loop to break.]
AzureIoTClient	41:71c01aa3df1a	1075	static int create_send_pending_events_state(TELEMETRY_MESSENGER_INSTANCE* instance, SEND_PENDING_EVENTS_STATE *send_pending_events_state)
AzureIoTClient	36:f78f9a56869e	1076	{
AzureIoTClient	41:71c01aa3df1a	1077	int result;
AzureIoTClient	41:71c01aa3df1a	1078	memset(send_pending_events_state, 0, sizeof(*send_pending_events_state));
AzureIoTClient	41:71c01aa3df1a	1079
AzureIoTClient	41:71c01aa3df1a	1080	if ((send_pending_events_state->message_batch_container = message_create()) == NULL)
AzureIoTClient	41:71c01aa3df1a	1081	{
AzureIoTClient	41:71c01aa3df1a	1082	LogError("messageBatchContainer = message_create() failed");
AzureIoTClient	41:71c01aa3df1a	1083	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1084	}
AzureIoTClient	41:71c01aa3df1a	1085	else if (message_set_message_format(send_pending_events_state->message_batch_container, AMQP_BATCHING_FORMAT_CODE) != 0)
AzureIoTClient	41:71c01aa3df1a	1086	{
AzureIoTClient	46:c688c75b63b9	1087	LogError("Failed setting the message format to batching format");
AzureIoTClient	46:c688c75b63b9	1088	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1089	}
AzureIoTClient	41:71c01aa3df1a	1090	else if ((send_pending_events_state->task = create_task(instance)) == NULL)
AzureIoTClient	41:71c01aa3df1a	1091	{
AzureIoTClient	41:71c01aa3df1a	1092	LogError("create_task() failed");
AzureIoTClient	41:71c01aa3df1a	1093	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1094	}
AzureIoTClient	41:71c01aa3df1a	1095	else
AzureIoTClient	41:71c01aa3df1a	1096	{
AzureIoTClient	41:71c01aa3df1a	1097	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1098	}
AzureIoTClient	41:71c01aa3df1a	1099
AzureIoTClient	41:71c01aa3df1a	1100	return result;
AzureIoTClient	41:71c01aa3df1a	1101	}
AzureIoTClient	41:71c01aa3df1a	1102
AzureIoTClient	41:71c01aa3df1a	1103	static void invoke_callback_on_error(MESSENGER_SEND_EVENT_CALLER_INFORMATION* caller_info, TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT messenger_event_send_complete_result)
AzureIoTClient	41:71c01aa3df1a	1104	{
AzureIoTClient	41:71c01aa3df1a	1105	caller_info->on_event_send_complete_callback(caller_info->message, messenger_event_send_complete_result, (void*)caller_info->context);
AzureIoTClient	41:71c01aa3df1a	1106	}
AzureIoTClient	36:f78f9a56869e	1107
AzureIoTClient	41:71c01aa3df1a	1108	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_194: [When message is ready to send, invoke AMQP's messagesender_send and free temporary values associated with this batch.]
AzureIoTClient	41:71c01aa3df1a	1109	static int send_batched_message_and_reset_state(TELEMETRY_MESSENGER_INSTANCE* instance, SEND_PENDING_EVENTS_STATE *send_pending_events_state)
AzureIoTClient	41:71c01aa3df1a	1110	{
AzureIoTClient	41:71c01aa3df1a	1111	int result;
AzureIoTClient	41:71c01aa3df1a	1112
AzureIoTClient	43:3da2d93bb955	1113	if (messagesender_send_async(instance->message_sender, send_pending_events_state->message_batch_container, internal_on_event_send_complete_callback, send_pending_events_state->task, 0) == NULL)
AzureIoTClient	41:71c01aa3df1a	1114	{
AzureIoTClient	41:71c01aa3df1a	1115	LogError("messagesender_send failed");
AzureIoTClient	41:71c01aa3df1a	1116	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1117	}
AzureIoTClient	41:71c01aa3df1a	1118	else
AzureIoTClient	41:71c01aa3df1a	1119	{
AzureIoTClient	41:71c01aa3df1a	1120	send_pending_events_state->task->send_time = get_time(NULL);
AzureIoTClient	41:71c01aa3df1a	1121	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1122	}
AzureIoTClient	41:71c01aa3df1a	1123
AzureIoTClient	41:71c01aa3df1a	1124	message_destroy(send_pending_events_state->message_batch_container);
AzureIoTClient	41:71c01aa3df1a	1125	memset(send_pending_events_state, 0, sizeof(*send_pending_events_state));
AzureIoTClient	41:71c01aa3df1a	1126
AzureIoTClient	41:71c01aa3df1a	1127	return result;
AzureIoTClient	41:71c01aa3df1a	1128	}
AzureIoTClient	36:f78f9a56869e	1129
AzureIoTClient	41:71c01aa3df1a	1130	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_196: [Determine the maximum message size we can send over this link from AMQP, then remove AMQP_BATCHING_RESERVE_SIZE (1024) bytes as reserve buffer.]
AzureIoTClient	41:71c01aa3df1a	1131	static int get_max_message_size_for_batching(TELEMETRY_MESSENGER_INSTANCE* instance, uint64_t* max_messagesize)
AzureIoTClient	41:71c01aa3df1a	1132	{
AzureIoTClient	41:71c01aa3df1a	1133	int result;
AzureIoTClient	36:f78f9a56869e	1134
AzureIoTClient	41:71c01aa3df1a	1135	if (link_get_peer_max_message_size(instance->sender_link, max_messagesize) != 0)
AzureIoTClient	41:71c01aa3df1a	1136	{
AzureIoTClient	41:71c01aa3df1a	1137	LogError("link_get_peer_max_message_size failed");
AzureIoTClient	41:71c01aa3df1a	1138	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1139	}
AzureIoTClient	41:71c01aa3df1a	1140	// Reserve AMQP_BATCHING_RESERVE_SIZE bytes for AMQP overhead of the "main" message itself.
AzureIoTClient	41:71c01aa3df1a	1141	else if (*max_messagesize <= AMQP_BATCHING_RESERVE_SIZE)
AzureIoTClient	41:71c01aa3df1a	1142	{
AzureIoTClient	41:71c01aa3df1a	1143	LogError("link_get_peer_max_message_size (%d) is less than the reserve size (%d)", max_messagesize, AMQP_BATCHING_RESERVE_SIZE);
AzureIoTClient	41:71c01aa3df1a	1144	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1145	}
AzureIoTClient	41:71c01aa3df1a	1146	else
AzureIoTClient	41:71c01aa3df1a	1147	{
AzureIoTClient	41:71c01aa3df1a	1148	*max_messagesize -= AMQP_BATCHING_RESERVE_SIZE;
AzureIoTClient	41:71c01aa3df1a	1149	result = 0;
AzureIoTClient	41:71c01aa3df1a	1150	}
AzureIoTClient	41:71c01aa3df1a	1151
AzureIoTClient	41:71c01aa3df1a	1152	return result;
AzureIoTClient	36:f78f9a56869e	1153	}
AzureIoTClient	36:f78f9a56869e	1154
AzureIoTClient	36:f78f9a56869e	1155	static int send_pending_events(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	1156	{
AzureIoTClient	41:71c01aa3df1a	1157	int result = RESULT_OK;
AzureIoTClient	36:f78f9a56869e	1158
AzureIoTClient	41:71c01aa3df1a	1159	MESSENGER_SEND_EVENT_CALLER_INFORMATION* caller_info;
AzureIoTClient	41:71c01aa3df1a	1160	BINARY_DATA body_binary_data;
AzureIoTClient	36:f78f9a56869e	1161
AzureIoTClient	41:71c01aa3df1a	1162	SEND_PENDING_EVENTS_STATE send_pending_events_state;
AzureIoTClient	41:71c01aa3df1a	1163	memset(&send_pending_events_state, 0, sizeof(send_pending_events_state));
AzureIoTClient	41:71c01aa3df1a	1164	memset(&body_binary_data, 0, sizeof(body_binary_data));
AzureIoTClient	36:f78f9a56869e	1165
AzureIoTClient	41:71c01aa3df1a	1166	uint64_t max_messagesize = 0;
AzureIoTClient	36:f78f9a56869e	1167
AzureIoTClient	41:71c01aa3df1a	1168	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_192: [Enumerate through all messages waiting to send, building up AMQP message to send and sending when size will be greater than link max size.]
AzureIoTClient	41:71c01aa3df1a	1169	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_198: [While processing pending messages, errors shall result in user callback being invoked.]
AzureIoTClient	41:71c01aa3df1a	1170	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_199: [Errors specific to a message (e.g. failure to encode) are NOT fatal but we'll keep processing. More general errors (e.g. out of memory) will stop processing.]
AzureIoTClient	41:71c01aa3df1a	1171	while ((caller_info = get_next_caller_message_to_send(instance)) != NULL)
AzureIoTClient	41:71c01aa3df1a	1172	{
AzureIoTClient	41:71c01aa3df1a	1173	if (body_binary_data.bytes != NULL)
AzureIoTClient	41:71c01aa3df1a	1174	{
AzureIoTClient	41:71c01aa3df1a	1175	// Free here as this may have been set during previous run through loop.
AzureIoTClient	41:71c01aa3df1a	1176	free((unsigned char*)body_binary_data.bytes);
AzureIoTClient	41:71c01aa3df1a	1177	}
AzureIoTClient	41:71c01aa3df1a	1178	memset(&body_binary_data, 0, sizeof(body_binary_data));
AzureIoTClient	41:71c01aa3df1a	1179
AzureIoTClient	41:71c01aa3df1a	1180	if ((0 == max_messagesize) && (get_max_message_size_for_batching(instance, &max_messagesize)) != 0)
AzureIoTClient	41:71c01aa3df1a	1181	{
AzureIoTClient	41:71c01aa3df1a	1182	LogError("get_max_message_size_for_batching failed");
AzureIoTClient	41:71c01aa3df1a	1183	invoke_callback_on_error(caller_info, TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING);
AzureIoTClient	41:71c01aa3df1a	1184	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	1185	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1186	break;
AzureIoTClient	41:71c01aa3df1a	1187	}
AzureIoTClient	41:71c01aa3df1a	1188	else if ((send_pending_events_state.task == 0) && (create_send_pending_events_state(instance, &send_pending_events_state) != 0))
AzureIoTClient	41:71c01aa3df1a	1189	{
AzureIoTClient	41:71c01aa3df1a	1190	LogError("create_send_pending_events_state failed");
AzureIoTClient	41:71c01aa3df1a	1191	invoke_callback_on_error(caller_info, TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING);
AzureIoTClient	41:71c01aa3df1a	1192	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	1193	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1194	break;
AzureIoTClient	41:71c01aa3df1a	1195	}
AzureIoTClient	41:71c01aa3df1a	1196	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_200: [Retrieve an AMQP encoded representation of this message for later appending to main batched message. On error, invoke callback but continue send loop; this is NOT a fatal error.]
AzureIoTClient	46:c688c75b63b9	1197	else if (message_create_uamqp_encoding_from_iothub_message(send_pending_events_state.message_batch_container, caller_info->message->messageHandle, &body_binary_data) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1198	{
AzureIoTClient	41:71c01aa3df1a	1199	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_201: [If message_create_uamqp_encoding_from_iothub_message fails, invoke callback with TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_CANNOT_PARSE]
AzureIoTClient	41:71c01aa3df1a	1200	LogError("message_create_uamqp_encoding_from_iothub_message() failed. Will continue to try to process messages, result");
AzureIoTClient	41:71c01aa3df1a	1201	invoke_callback_on_error(caller_info, TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_CANNOT_PARSE);
AzureIoTClient	41:71c01aa3df1a	1202	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	1203	continue;
AzureIoTClient	41:71c01aa3df1a	1204	}
AzureIoTClient	41:71c01aa3df1a	1205	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_197: [If a single message is greater than our maximum AMQP send size, ignore the message. Invoke the callback but continue send loop; this is NOT a fatal error.]
AzureIoTClient	41:71c01aa3df1a	1206	else if (body_binary_data.length > (int)max_messagesize)
AzureIoTClient	41:71c01aa3df1a	1207	{
AzureIoTClient	41:71c01aa3df1a	1208	LogError("a single message will encode to be %d bytes, larger than max we will send the link %lld. Will continue to try to process messages", body_binary_data.length, max_messagesize);
AzureIoTClient	41:71c01aa3df1a	1209	invoke_callback_on_error(caller_info, TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING);
AzureIoTClient	41:71c01aa3df1a	1210	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	1211	continue;
AzureIoTClient	41:71c01aa3df1a	1212	}
AzureIoTClient	41:71c01aa3df1a	1213	else if (singlylinkedlist_add(send_pending_events_state.task->callback_list, (void*)caller_info) == NULL)
AzureIoTClient	41:71c01aa3df1a	1214	{
AzureIoTClient	41:71c01aa3df1a	1215	LogError("singlylinkedlist_add failed");
AzureIoTClient	41:71c01aa3df1a	1216	invoke_callback_on_error(caller_info, TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING);
AzureIoTClient	41:71c01aa3df1a	1217	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	1218	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1219	break;
AzureIoTClient	41:71c01aa3df1a	1220	}
AzureIoTClient	36:f78f9a56869e	1221
AzureIoTClient	41:71c01aa3df1a	1222	// Once we've added the caller_info to the callback_list, don't directly 'invoke_callback_on_error' anymore directly.
AzureIoTClient	41:71c01aa3df1a	1223	// The task is responsible for running through its callers for callbacks, even for errors in this function.
AzureIoTClient	41:71c01aa3df1a	1224	// Similarly, responsibility for freeing this memory falls on the 'task' cleanup also.
AzureIoTClient	36:f78f9a56869e	1225
AzureIoTClient	41:71c01aa3df1a	1226	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_193: [If (length of current user AMQP message) + (length of user messages pending for this batched message) + (1KB reserve buffer) > maximum link send, send pending messages and create new batched message.]
AzureIoTClient	41:71c01aa3df1a	1227	if (body_binary_data.length + send_pending_events_state.bytes_pending > max_messagesize)
AzureIoTClient	41:71c01aa3df1a	1228	{
AzureIoTClient	41:71c01aa3df1a	1229	// If we tried to add the current message, we would overflow. Send what we've queued immediately.
AzureIoTClient	41:71c01aa3df1a	1230	if (send_batched_message_and_reset_state(instance, &send_pending_events_state) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1231	{
AzureIoTClient	41:71c01aa3df1a	1232	LogError("send_batched_message_and_reset_state failed");
AzureIoTClient	41:71c01aa3df1a	1233	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1234	break;
AzureIoTClient	41:71c01aa3df1a	1235	}
AzureIoTClient	36:f78f9a56869e	1236
AzureIoTClient	41:71c01aa3df1a	1237	// Now that we've given off the task to uAMQP layer, allocate a new task.
AzureIoTClient	41:71c01aa3df1a	1238	if (create_send_pending_events_state(instance, &send_pending_events_state) != 0)
AzureIoTClient	41:71c01aa3df1a	1239	{
AzureIoTClient	41:71c01aa3df1a	1240	LogError("create_send_pending_events_state failed, result");
AzureIoTClient	41:71c01aa3df1a	1241	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1242	break;
AzureIoTClient	41:71c01aa3df1a	1243	}
AzureIoTClient	41:71c01aa3df1a	1244	}
AzureIoTClient	36:f78f9a56869e	1245
AzureIoTClient	41:71c01aa3df1a	1246	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_31_195: [Append the current message's encoded data to the batched message tracked by uAMQP layer.]
AzureIoTClient	41:71c01aa3df1a	1247	if (message_add_body_amqp_data(send_pending_events_state.message_batch_container, body_binary_data) != 0)
AzureIoTClient	41:71c01aa3df1a	1248	{
AzureIoTClient	41:71c01aa3df1a	1249	LogError("message_add_body_amqp_data failed");
AzureIoTClient	41:71c01aa3df1a	1250	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1251	break;
AzureIoTClient	41:71c01aa3df1a	1252	}
AzureIoTClient	36:f78f9a56869e	1253
AzureIoTClient	41:71c01aa3df1a	1254	send_pending_events_state.bytes_pending += body_binary_data.length;
AzureIoTClient	41:71c01aa3df1a	1255	}
AzureIoTClient	41:71c01aa3df1a	1256
AzureIoTClient	41:71c01aa3df1a	1257	if ((result == 0) && (send_pending_events_state.bytes_pending != 0))
AzureIoTClient	41:71c01aa3df1a	1258	{
AzureIoTClient	41:71c01aa3df1a	1259	if (send_batched_message_and_reset_state(instance, &send_pending_events_state) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1260	{
AzureIoTClient	41:71c01aa3df1a	1261	LogError("send_batched_message_and_reset_state failed");
AzureIoTClient	41:71c01aa3df1a	1262	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1263	}
AzureIoTClient	41:71c01aa3df1a	1264	}
AzureIoTClient	36:f78f9a56869e	1265
AzureIoTClient	41:71c01aa3df1a	1266	if (body_binary_data.bytes != NULL)
AzureIoTClient	41:71c01aa3df1a	1267	{
AzureIoTClient	41:71c01aa3df1a	1268	free((unsigned char*)body_binary_data.bytes);
AzureIoTClient	41:71c01aa3df1a	1269	}
AzureIoTClient	36:f78f9a56869e	1270
AzureIoTClient	41:71c01aa3df1a	1271	// A non-NULL task indicates error, since otherwise send_batched_message_and_reset_state would've sent off messages and reset send_pending_events_state
AzureIoTClient	41:71c01aa3df1a	1272	if (send_pending_events_state.task != NULL)
AzureIoTClient	41:71c01aa3df1a	1273	{
AzureIoTClient	41:71c01aa3df1a	1274	singlylinkedlist_foreach(send_pending_events_state.task->callback_list, invoke_callback, (void*)TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_FAIL_SENDING);
AzureIoTClient	41:71c01aa3df1a	1275	remove_event_from_in_progress_list(send_pending_events_state.task);
AzureIoTClient	41:71c01aa3df1a	1276	free_task(send_pending_events_state.task);
AzureIoTClient	41:71c01aa3df1a	1277	}
AzureIoTClient	41:71c01aa3df1a	1278
AzureIoTClient	41:71c01aa3df1a	1279	if (send_pending_events_state.message_batch_container != NULL)
AzureIoTClient	41:71c01aa3df1a	1280	{
AzureIoTClient	41:71c01aa3df1a	1281	message_destroy(send_pending_events_state.message_batch_container);
AzureIoTClient	41:71c01aa3df1a	1282	}
AzureIoTClient	41:71c01aa3df1a	1283
AzureIoTClient	41:71c01aa3df1a	1284	return result;
AzureIoTClient	36:f78f9a56869e	1285	}
AzureIoTClient	36:f78f9a56869e	1286
AzureIoTClient	36:f78f9a56869e	1287	// @brief
AzureIoTClient	36:f78f9a56869e	1288	// Goes through each task in in_progress_list and checks if the events timed out to be sent.
AzureIoTClient	36:f78f9a56869e	1289	// @remarks
AzureIoTClient	36:f78f9a56869e	1290	// If an event is timed out, it is marked as such but not removed, and the upper layer callback is invoked.
AzureIoTClient	36:f78f9a56869e	1291	// @returns
AzureIoTClient	36:f78f9a56869e	1292	// 0 if no failures occur, non-zero otherwise.
AzureIoTClient	36:f78f9a56869e	1293	static int process_event_send_timeouts(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	1294	{
AzureIoTClient	41:71c01aa3df1a	1295	int result = RESULT_OK;
AzureIoTClient	36:f78f9a56869e	1296
AzureIoTClient	41:71c01aa3df1a	1297	if (instance->event_send_timeout_secs > 0)
AzureIoTClient	41:71c01aa3df1a	1298	{
AzureIoTClient	41:71c01aa3df1a	1299	LIST_ITEM_HANDLE list_item = singlylinkedlist_get_head_item(instance->in_progress_list);
AzureIoTClient	36:f78f9a56869e	1300
AzureIoTClient	41:71c01aa3df1a	1301	while (list_item != NULL)
AzureIoTClient	41:71c01aa3df1a	1302	{
AzureIoTClient	41:71c01aa3df1a	1303	MESSENGER_SEND_EVENT_TASK* task = (MESSENGER_SEND_EVENT_TASK*)singlylinkedlist_item_get_value(list_item);
AzureIoTClient	36:f78f9a56869e	1304
AzureIoTClient	41:71c01aa3df1a	1305	if (task->is_timed_out == false)
AzureIoTClient	41:71c01aa3df1a	1306	{
AzureIoTClient	41:71c01aa3df1a	1307	int is_timed_out;
AzureIoTClient	36:f78f9a56869e	1308
AzureIoTClient	41:71c01aa3df1a	1309	if (is_timeout_reached(task->send_time, instance->event_send_timeout_secs, &is_timed_out) == RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1310	{
AzureIoTClient	41:71c01aa3df1a	1311	if (is_timed_out)
AzureIoTClient	41:71c01aa3df1a	1312	{
AzureIoTClient	41:71c01aa3df1a	1313	task->is_timed_out = true;
AzureIoTClient	41:71c01aa3df1a	1314	singlylinkedlist_foreach(task->callback_list, invoke_callback, (void*)TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_ERROR_TIMEOUT);
AzureIoTClient	41:71c01aa3df1a	1315	}
AzureIoTClient	41:71c01aa3df1a	1316	}
AzureIoTClient	41:71c01aa3df1a	1317	else
AzureIoTClient	41:71c01aa3df1a	1318	{
AzureIoTClient	41:71c01aa3df1a	1319	LogError("messenger failed to evaluate event send timeout of event %d", task);
AzureIoTClient	41:71c01aa3df1a	1320	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1321	}
AzureIoTClient	41:71c01aa3df1a	1322	}
AzureIoTClient	36:f78f9a56869e	1323
AzureIoTClient	41:71c01aa3df1a	1324	list_item = singlylinkedlist_get_next_item(list_item);
AzureIoTClient	41:71c01aa3df1a	1325	}
AzureIoTClient	41:71c01aa3df1a	1326	}
AzureIoTClient	36:f78f9a56869e	1327
AzureIoTClient	41:71c01aa3df1a	1328	return result;
AzureIoTClient	36:f78f9a56869e	1329	}
AzureIoTClient	36:f78f9a56869e	1330
AzureIoTClient	36:f78f9a56869e	1331	// @brief
AzureIoTClient	36:f78f9a56869e	1332	// Removes all the timed out events from the in_progress_list, without invoking callbacks or detroying the messages.
AzureIoTClient	36:f78f9a56869e	1333	static void remove_timed_out_events(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	1334	{
AzureIoTClient	41:71c01aa3df1a	1335	LIST_ITEM_HANDLE list_item = singlylinkedlist_get_head_item(instance->in_progress_list);
AzureIoTClient	36:f78f9a56869e	1336
AzureIoTClient	41:71c01aa3df1a	1337	while (list_item != NULL)
AzureIoTClient	41:71c01aa3df1a	1338	{
AzureIoTClient	41:71c01aa3df1a	1339	MESSENGER_SEND_EVENT_TASK* task = (MESSENGER_SEND_EVENT_TASK*)singlylinkedlist_item_get_value(list_item);
AzureIoTClient	36:f78f9a56869e	1340
AzureIoTClient	41:71c01aa3df1a	1341	if (task->is_timed_out == true)
AzureIoTClient	41:71c01aa3df1a	1342	{
AzureIoTClient	41:71c01aa3df1a	1343	remove_event_from_in_progress_list(task);
AzureIoTClient	36:f78f9a56869e	1344
AzureIoTClient	41:71c01aa3df1a	1345	free_task(task);
AzureIoTClient	41:71c01aa3df1a	1346	}
AzureIoTClient	36:f78f9a56869e	1347
AzureIoTClient	41:71c01aa3df1a	1348	list_item = singlylinkedlist_get_next_item(list_item);
AzureIoTClient	41:71c01aa3df1a	1349	}
AzureIoTClient	36:f78f9a56869e	1350	}
AzureIoTClient	36:f78f9a56869e	1351
AzureIoTClient	36:f78f9a56869e	1352
AzureIoTClient	36:f78f9a56869e	1353	// ---------- Set/Retrieve Options Helpers ----------//
AzureIoTClient	36:f78f9a56869e	1354
AzureIoTClient	36:f78f9a56869e	1355	static void* telemetry_messenger_clone_option(const char* name, const void* value)
AzureIoTClient	36:f78f9a56869e	1356	{
AzureIoTClient	41:71c01aa3df1a	1357	void* result;
AzureIoTClient	36:f78f9a56869e	1358
AzureIoTClient	41:71c01aa3df1a	1359	if (name == NULL)
AzureIoTClient	41:71c01aa3df1a	1360	{
AzureIoTClient	41:71c01aa3df1a	1361	LogError("Failed to clone messenger option (name is NULL)");
AzureIoTClient	41:71c01aa3df1a	1362	result = NULL;
AzureIoTClient	41:71c01aa3df1a	1363	}
AzureIoTClient	41:71c01aa3df1a	1364	else if (value == NULL)
AzureIoTClient	41:71c01aa3df1a	1365	{
AzureIoTClient	41:71c01aa3df1a	1366	LogError("Failed to clone messenger option (value is NULL)");
AzureIoTClient	41:71c01aa3df1a	1367	result = NULL;
AzureIoTClient	41:71c01aa3df1a	1368	}
AzureIoTClient	41:71c01aa3df1a	1369	else
AzureIoTClient	41:71c01aa3df1a	1370	{
AzureIoTClient	41:71c01aa3df1a	1371	if (strcmp(MESSENGER_OPTION_EVENT_SEND_TIMEOUT_SECS, name) == 0 \|\|
AzureIoTClient	41:71c01aa3df1a	1372	strcmp(MESSENGER_OPTION_SAVED_OPTIONS, name) == 0)
AzureIoTClient	41:71c01aa3df1a	1373	{
AzureIoTClient	41:71c01aa3df1a	1374	result = (void*)value;
AzureIoTClient	41:71c01aa3df1a	1375	}
AzureIoTClient	41:71c01aa3df1a	1376	else
AzureIoTClient	41:71c01aa3df1a	1377	{
AzureIoTClient	41:71c01aa3df1a	1378	LogError("Failed to clone messenger option (option with name '%s' is not suppported)", name);
AzureIoTClient	41:71c01aa3df1a	1379	result = NULL;
AzureIoTClient	41:71c01aa3df1a	1380	}
AzureIoTClient	41:71c01aa3df1a	1381	}
AzureIoTClient	36:f78f9a56869e	1382
AzureIoTClient	41:71c01aa3df1a	1383	return result;
AzureIoTClient	36:f78f9a56869e	1384	}
AzureIoTClient	36:f78f9a56869e	1385
AzureIoTClient	36:f78f9a56869e	1386	static void telemetry_messenger_destroy_option(const char* name, const void* value)
AzureIoTClient	36:f78f9a56869e	1387	{
AzureIoTClient	41:71c01aa3df1a	1388	if (name == NULL)
AzureIoTClient	41:71c01aa3df1a	1389	{
AzureIoTClient	41:71c01aa3df1a	1390	LogError("Failed to destroy messenger option (name is NULL)");
AzureIoTClient	41:71c01aa3df1a	1391	}
AzureIoTClient	41:71c01aa3df1a	1392	else if (value == NULL)
AzureIoTClient	41:71c01aa3df1a	1393	{
AzureIoTClient	41:71c01aa3df1a	1394	LogError("Failed to destroy messenger option (value is NULL)");
AzureIoTClient	41:71c01aa3df1a	1395	}
AzureIoTClient	41:71c01aa3df1a	1396	else
AzureIoTClient	41:71c01aa3df1a	1397	{
AzureIoTClient	41:71c01aa3df1a	1398	// Nothing to be done for the supported options.
AzureIoTClient	41:71c01aa3df1a	1399	}
AzureIoTClient	36:f78f9a56869e	1400	}
AzureIoTClient	36:f78f9a56869e	1401
AzureIoTClient	36:f78f9a56869e	1402
AzureIoTClient	36:f78f9a56869e	1403	// Public API:
AzureIoTClient	36:f78f9a56869e	1404
AzureIoTClient	36:f78f9a56869e	1405	int telemetry_messenger_subscribe_for_messages(TELEMETRY_MESSENGER_HANDLE messenger_handle, ON_TELEMETRY_MESSENGER_MESSAGE_RECEIVED on_message_received_callback, void* context)
AzureIoTClient	36:f78f9a56869e	1406	{
AzureIoTClient	41:71c01aa3df1a	1407	int result;
AzureIoTClient	36:f78f9a56869e	1408
AzureIoTClient	41:71c01aa3df1a	1409	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_016: [If `messenger_handle` is NULL, telemetry_messenger_subscribe_for_messages() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1410	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1411	{
AzureIoTClient	41:71c01aa3df1a	1412	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1413	LogError("telemetry_messenger_subscribe_for_messages failed (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1414	}
AzureIoTClient	41:71c01aa3df1a	1415	else
AzureIoTClient	41:71c01aa3df1a	1416	{
AzureIoTClient	41:71c01aa3df1a	1417	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1418
AzureIoTClient	41:71c01aa3df1a	1419	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_017: [If `instance->receive_messages` is already true, telemetry_messenger_subscribe_for_messages() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1420	if (instance->receive_messages)
AzureIoTClient	41:71c01aa3df1a	1421	{
AzureIoTClient	41:71c01aa3df1a	1422	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1423	LogError("telemetry_messenger_subscribe_for_messages failed (messenger already subscribed)");
AzureIoTClient	41:71c01aa3df1a	1424	}
AzureIoTClient	41:71c01aa3df1a	1425	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_018: [If `on_message_received_callback` is NULL, telemetry_messenger_subscribe_for_messages() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1426	else if (on_message_received_callback == NULL)
AzureIoTClient	41:71c01aa3df1a	1427	{
AzureIoTClient	41:71c01aa3df1a	1428	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1429	LogError("telemetry_messenger_subscribe_for_messages failed (on_message_received_callback is NULL)");
AzureIoTClient	41:71c01aa3df1a	1430	}
AzureIoTClient	41:71c01aa3df1a	1431	else
AzureIoTClient	41:71c01aa3df1a	1432	{
AzureIoTClient	41:71c01aa3df1a	1433	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_019: [`on_message_received_callback` shall be saved on `instance->on_message_received_callback`]
AzureIoTClient	41:71c01aa3df1a	1434	instance->on_message_received_callback = on_message_received_callback;
AzureIoTClient	36:f78f9a56869e	1435
AzureIoTClient	41:71c01aa3df1a	1436	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_020: [`context` shall be saved on `instance->on_message_received_context`]
AzureIoTClient	41:71c01aa3df1a	1437	instance->on_message_received_context = context;
AzureIoTClient	36:f78f9a56869e	1438
AzureIoTClient	41:71c01aa3df1a	1439	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_021: [telemetry_messenger_subscribe_for_messages() shall set `instance->receive_messages` to true]
AzureIoTClient	41:71c01aa3df1a	1440	instance->receive_messages = true;
AzureIoTClient	36:f78f9a56869e	1441
AzureIoTClient	41:71c01aa3df1a	1442	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_022: [If no failures occurr, telemetry_messenger_subscribe_for_messages() shall return 0]
AzureIoTClient	41:71c01aa3df1a	1443	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1444	}
AzureIoTClient	41:71c01aa3df1a	1445	}
AzureIoTClient	36:f78f9a56869e	1446
AzureIoTClient	41:71c01aa3df1a	1447	return result;
AzureIoTClient	36:f78f9a56869e	1448	}
AzureIoTClient	36:f78f9a56869e	1449
AzureIoTClient	36:f78f9a56869e	1450	int telemetry_messenger_unsubscribe_for_messages(TELEMETRY_MESSENGER_HANDLE messenger_handle)
AzureIoTClient	36:f78f9a56869e	1451	{
AzureIoTClient	41:71c01aa3df1a	1452	int result;
AzureIoTClient	36:f78f9a56869e	1453
AzureIoTClient	41:71c01aa3df1a	1454	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_023: [If `messenger_handle` is NULL, telemetry_messenger_unsubscribe_for_messages() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1455	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1456	{
AzureIoTClient	41:71c01aa3df1a	1457	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1458	LogError("telemetry_messenger_unsubscribe_for_messages failed (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1459	}
AzureIoTClient	41:71c01aa3df1a	1460	else
AzureIoTClient	41:71c01aa3df1a	1461	{
AzureIoTClient	41:71c01aa3df1a	1462	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1463
AzureIoTClient	41:71c01aa3df1a	1464	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_024: [If `instance->receive_messages` is already false, telemetry_messenger_unsubscribe_for_messages() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1465	if (instance->receive_messages == false)
AzureIoTClient	41:71c01aa3df1a	1466	{
AzureIoTClient	41:71c01aa3df1a	1467	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1468	LogError("telemetry_messenger_unsubscribe_for_messages failed (messenger is not subscribed)");
AzureIoTClient	41:71c01aa3df1a	1469	}
AzureIoTClient	41:71c01aa3df1a	1470	else
AzureIoTClient	41:71c01aa3df1a	1471	{
AzureIoTClient	41:71c01aa3df1a	1472	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_025: [telemetry_messenger_unsubscribe_for_messages() shall set `instance->receive_messages` to false]
AzureIoTClient	41:71c01aa3df1a	1473	instance->receive_messages = false;
AzureIoTClient	41:71c01aa3df1a	1474
AzureIoTClient	41:71c01aa3df1a	1475	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_026: [telemetry_messenger_unsubscribe_for_messages() shall set `instance->on_message_received_callback` to NULL]
AzureIoTClient	41:71c01aa3df1a	1476	instance->on_message_received_callback = NULL;
AzureIoTClient	41:71c01aa3df1a	1477
AzureIoTClient	41:71c01aa3df1a	1478	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_027: [telemetry_messenger_unsubscribe_for_messages() shall set `instance->on_message_received_context` to NULL]
AzureIoTClient	41:71c01aa3df1a	1479	instance->on_message_received_context = NULL;
AzureIoTClient	41:71c01aa3df1a	1480
AzureIoTClient	41:71c01aa3df1a	1481	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_028: [If no failures occurr, telemetry_messenger_unsubscribe_for_messages() shall return 0]
AzureIoTClient	41:71c01aa3df1a	1482	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1483	}
AzureIoTClient	41:71c01aa3df1a	1484	}
AzureIoTClient	36:f78f9a56869e	1485
AzureIoTClient	41:71c01aa3df1a	1486	return result;
AzureIoTClient	36:f78f9a56869e	1487	}
AzureIoTClient	36:f78f9a56869e	1488
AzureIoTClient	36:f78f9a56869e	1489	int telemetry_messenger_send_message_disposition(TELEMETRY_MESSENGER_HANDLE messenger_handle, TELEMETRY_MESSENGER_MESSAGE_DISPOSITION_INFO* disposition_info, TELEMETRY_MESSENGER_DISPOSITION_RESULT disposition_result)
AzureIoTClient	36:f78f9a56869e	1490	{
AzureIoTClient	41:71c01aa3df1a	1491	int result;
AzureIoTClient	36:f78f9a56869e	1492
AzureIoTClient	41:71c01aa3df1a	1493	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_179: [If `messenger_handle` or `disposition_info` are NULL, telemetry_messenger_send_message_disposition() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1494	if (messenger_handle == NULL \|\| disposition_info == NULL)
AzureIoTClient	41:71c01aa3df1a	1495	{
AzureIoTClient	41:71c01aa3df1a	1496	LogError("Failed sending message disposition (either messenger_handle (%p) or disposition_info (%p) are NULL)", messenger_handle, disposition_info);
AzureIoTClient	41:71c01aa3df1a	1497	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1498	}
AzureIoTClient	41:71c01aa3df1a	1499	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_180: [If `disposition_info->source` is NULL, telemetry_messenger_send_message_disposition() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1500	else if (disposition_info->source == NULL)
AzureIoTClient	41:71c01aa3df1a	1501	{
AzureIoTClient	41:71c01aa3df1a	1502	LogError("Failed sending message disposition (disposition_info->source is NULL)");
AzureIoTClient	41:71c01aa3df1a	1503	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1504	}
AzureIoTClient	41:71c01aa3df1a	1505	else
AzureIoTClient	41:71c01aa3df1a	1506	{
AzureIoTClient	41:71c01aa3df1a	1507	TELEMETRY_MESSENGER_INSTANCE* messenger = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1508
AzureIoTClient	41:71c01aa3df1a	1509	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_189: [If `messenger_handle->message_receiver` is NULL, telemetry_messenger_send_message_disposition() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1510	if (messenger->message_receiver == NULL)
AzureIoTClient	41:71c01aa3df1a	1511	{
AzureIoTClient	41:71c01aa3df1a	1512	LogError("Failed sending message disposition (message_receiver is not created; check if it is subscribed)");
AzureIoTClient	41:71c01aa3df1a	1513	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1514	}
AzureIoTClient	41:71c01aa3df1a	1515	else
AzureIoTClient	41:71c01aa3df1a	1516	{
AzureIoTClient	41:71c01aa3df1a	1517	AMQP_VALUE uamqp_disposition_result;
AzureIoTClient	36:f78f9a56869e	1518
AzureIoTClient	41:71c01aa3df1a	1519	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_181: [An AMQP_VALUE disposition result shall be created corresponding to the `disposition_result` provided]
AzureIoTClient	41:71c01aa3df1a	1520	if ((uamqp_disposition_result = create_uamqp_disposition_result_from(disposition_result)) == NULL)
AzureIoTClient	41:71c01aa3df1a	1521	{
AzureIoTClient	41:71c01aa3df1a	1522	LogError("Failed sending message disposition (disposition result %d is not supported)", disposition_result);
AzureIoTClient	41:71c01aa3df1a	1523	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1524	}
AzureIoTClient	41:71c01aa3df1a	1525	else
AzureIoTClient	41:71c01aa3df1a	1526	{
AzureIoTClient	41:71c01aa3df1a	1527	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_182: [`messagereceiver_send_message_disposition()` shall be invoked passing `disposition_info->source`, `disposition_info->message_id` and the corresponding AMQP_VALUE disposition result]
AzureIoTClient	41:71c01aa3df1a	1528	if (messagereceiver_send_message_disposition(messenger->message_receiver, disposition_info->source, disposition_info->message_id, uamqp_disposition_result) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1529	{
AzureIoTClient	41:71c01aa3df1a	1530	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_183: [If `messagereceiver_send_message_disposition()` fails, telemetry_messenger_send_message_disposition() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1531	LogError("Failed sending message disposition (messagereceiver_send_message_disposition failed)");
AzureIoTClient	41:71c01aa3df1a	1532	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1533	}
AzureIoTClient	41:71c01aa3df1a	1534	else
AzureIoTClient	41:71c01aa3df1a	1535	{
AzureIoTClient	41:71c01aa3df1a	1536	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_185: [If no failures occurr, telemetry_messenger_send_message_disposition() shall return 0]
AzureIoTClient	41:71c01aa3df1a	1537	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1538	}
AzureIoTClient	36:f78f9a56869e	1539
AzureIoTClient	41:71c01aa3df1a	1540	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_184: [telemetry_messenger_send_message_disposition() shall destroy the AMQP_VALUE disposition result]
AzureIoTClient	41:71c01aa3df1a	1541	amqpvalue_destroy(uamqp_disposition_result);
AzureIoTClient	41:71c01aa3df1a	1542	}
AzureIoTClient	41:71c01aa3df1a	1543	}
AzureIoTClient	41:71c01aa3df1a	1544	}
AzureIoTClient	36:f78f9a56869e	1545
AzureIoTClient	41:71c01aa3df1a	1546	return result;
AzureIoTClient	36:f78f9a56869e	1547	}
AzureIoTClient	36:f78f9a56869e	1548
AzureIoTClient	36:f78f9a56869e	1549	int telemetry_messenger_send_async(TELEMETRY_MESSENGER_HANDLE messenger_handle, IOTHUB_MESSAGE_LIST* message, ON_TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE on_messenger_event_send_complete_callback, void* context)
AzureIoTClient	36:f78f9a56869e	1550	{
AzureIoTClient	41:71c01aa3df1a	1551	int result;
AzureIoTClient	36:f78f9a56869e	1552
AzureIoTClient	41:71c01aa3df1a	1553	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_134: [If `messenger_handle` is NULL, telemetry_messenger_send_async() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1554	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1555	{
AzureIoTClient	41:71c01aa3df1a	1556	LogError("Failed sending event (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1557	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1558	}
AzureIoTClient	41:71c01aa3df1a	1559	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_135: [If `message` is NULL, telemetry_messenger_send_async() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1560	else if (message == NULL)
AzureIoTClient	41:71c01aa3df1a	1561	{
AzureIoTClient	41:71c01aa3df1a	1562	LogError("Failed sending event (message is NULL)");
AzureIoTClient	41:71c01aa3df1a	1563	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1564	}
AzureIoTClient	41:71c01aa3df1a	1565	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_136: [If `on_event_send_complete_callback` is NULL, telemetry_messenger_send_async() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1566	else if (on_messenger_event_send_complete_callback == NULL)
AzureIoTClient	41:71c01aa3df1a	1567	{
AzureIoTClient	41:71c01aa3df1a	1568	LogError("Failed sending event (on_event_send_complete_callback is NULL)");
AzureIoTClient	41:71c01aa3df1a	1569	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1570	}
AzureIoTClient	41:71c01aa3df1a	1571	else
AzureIoTClient	41:71c01aa3df1a	1572	{
AzureIoTClient	41:71c01aa3df1a	1573	MESSENGER_SEND_EVENT_CALLER_INFORMATION *caller_info;
AzureIoTClient	41:71c01aa3df1a	1574	TELEMETRY_MESSENGER_INSTANCE instance = (TELEMETRY_MESSENGER_INSTANCE)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1575
AzureIoTClient	41:71c01aa3df1a	1576	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_137: [telemetry_messenger_send_async() shall allocate memory for a MESSENGER_SEND_EVENT_CALLER_INFORMATION structure]
AzureIoTClient	41:71c01aa3df1a	1577	if ((caller_info = (MESSENGER_SEND_EVENT_CALLER_INFORMATION*)malloc(sizeof(MESSENGER_SEND_EVENT_CALLER_INFORMATION))) == NULL)
AzureIoTClient	41:71c01aa3df1a	1578	{
AzureIoTClient	41:71c01aa3df1a	1579	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_138: [If malloc() fails, telemetry_messenger_send_async() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1580	LogError("Failed sending event (failed to create struct for task; malloc failed)");
AzureIoTClient	41:71c01aa3df1a	1581	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1582	}
AzureIoTClient	41:71c01aa3df1a	1583	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_100: [`task` shall be added to `instance->waiting_to_send` using singlylinkedlist_add()]
AzureIoTClient	41:71c01aa3df1a	1584	else if (singlylinkedlist_add(instance->waiting_to_send, caller_info) == NULL)
AzureIoTClient	41:71c01aa3df1a	1585	{
AzureIoTClient	41:71c01aa3df1a	1586	LogError("Failed sending event (singlylinkedlist_add failed)");
AzureIoTClient	36:f78f9a56869e	1587
AzureIoTClient	41:71c01aa3df1a	1588	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_139: [If singlylinkedlist_add() fails, telemetry_messenger_send_async() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1589	result = __FAILURE__;
AzureIoTClient	36:f78f9a56869e	1590
AzureIoTClient	41:71c01aa3df1a	1591	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_142: [If any failure occurs, telemetry_messenger_send_async() shall free any memory it has allocated]
AzureIoTClient	41:71c01aa3df1a	1592	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	1593	}
AzureIoTClient	41:71c01aa3df1a	1594	else
AzureIoTClient	41:71c01aa3df1a	1595	{
AzureIoTClient	41:71c01aa3df1a	1596	memset(caller_info, 0, sizeof(MESSENGER_SEND_EVENT_CALLER_INFORMATION));
AzureIoTClient	41:71c01aa3df1a	1597	caller_info->message = message;
AzureIoTClient	41:71c01aa3df1a	1598	caller_info->on_event_send_complete_callback = on_messenger_event_send_complete_callback;
AzureIoTClient	41:71c01aa3df1a	1599	caller_info->context = context;
AzureIoTClient	41:71c01aa3df1a	1600
AzureIoTClient	41:71c01aa3df1a	1601	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_143: [If no failures occur, telemetry_messenger_send_async() shall return zero]
AzureIoTClient	41:71c01aa3df1a	1602	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1603	}
AzureIoTClient	41:71c01aa3df1a	1604	}
AzureIoTClient	36:f78f9a56869e	1605
AzureIoTClient	41:71c01aa3df1a	1606	return result;
AzureIoTClient	36:f78f9a56869e	1607	}
AzureIoTClient	36:f78f9a56869e	1608
AzureIoTClient	36:f78f9a56869e	1609	int telemetry_messenger_get_send_status(TELEMETRY_MESSENGER_HANDLE messenger_handle, TELEMETRY_MESSENGER_SEND_STATUS* send_status)
AzureIoTClient	36:f78f9a56869e	1610	{
AzureIoTClient	41:71c01aa3df1a	1611	int result;
AzureIoTClient	36:f78f9a56869e	1612
AzureIoTClient	41:71c01aa3df1a	1613	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_144: [If `messenger_handle` is NULL, telemetry_messenger_get_send_status() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1614	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1615	{
AzureIoTClient	41:71c01aa3df1a	1616	LogError("telemetry_messenger_get_send_status failed (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1617	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1618	}
AzureIoTClient	41:71c01aa3df1a	1619	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_145: [If `send_status` is NULL, telemetry_messenger_get_send_status() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1620	else if (send_status == NULL)
AzureIoTClient	41:71c01aa3df1a	1621	{
AzureIoTClient	41:71c01aa3df1a	1622	LogError("telemetry_messenger_get_send_status failed (send_status is NULL)");
AzureIoTClient	41:71c01aa3df1a	1623	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1624	}
AzureIoTClient	41:71c01aa3df1a	1625	else
AzureIoTClient	41:71c01aa3df1a	1626	{
AzureIoTClient	41:71c01aa3df1a	1627	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	41:71c01aa3df1a	1628	LIST_ITEM_HANDLE wts_list_head = singlylinkedlist_get_head_item(instance->waiting_to_send);
AzureIoTClient	41:71c01aa3df1a	1629	LIST_ITEM_HANDLE ip_list_head = singlylinkedlist_get_head_item(instance->in_progress_list);
AzureIoTClient	36:f78f9a56869e	1630
AzureIoTClient	41:71c01aa3df1a	1631	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_147: [If `instance->in_progress_list` and `instance->wait_to_send_list` are empty, send_status shall be set to TELEMETRY_MESSENGER_SEND_STATUS_IDLE]
AzureIoTClient	41:71c01aa3df1a	1632	if (wts_list_head == NULL && ip_list_head == NULL)
AzureIoTClient	41:71c01aa3df1a	1633	{
AzureIoTClient	41:71c01aa3df1a	1634	*send_status = TELEMETRY_MESSENGER_SEND_STATUS_IDLE;
AzureIoTClient	41:71c01aa3df1a	1635	}
AzureIoTClient	41:71c01aa3df1a	1636	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_148: [Otherwise, send_status shall be set to TELEMETRY_MESSENGER_SEND_STATUS_BUSY]
AzureIoTClient	41:71c01aa3df1a	1637	else
AzureIoTClient	41:71c01aa3df1a	1638	{
AzureIoTClient	41:71c01aa3df1a	1639	*send_status = TELEMETRY_MESSENGER_SEND_STATUS_BUSY;
AzureIoTClient	41:71c01aa3df1a	1640	}
AzureIoTClient	36:f78f9a56869e	1641
AzureIoTClient	41:71c01aa3df1a	1642	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_149: [If no failures occur, telemetry_messenger_get_send_status() shall return 0]
AzureIoTClient	41:71c01aa3df1a	1643	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1644	}
AzureIoTClient	36:f78f9a56869e	1645
AzureIoTClient	41:71c01aa3df1a	1646	return result;
AzureIoTClient	36:f78f9a56869e	1647	}
AzureIoTClient	36:f78f9a56869e	1648
AzureIoTClient	36:f78f9a56869e	1649	int telemetry_messenger_start(TELEMETRY_MESSENGER_HANDLE messenger_handle, SESSION_HANDLE session_handle)
AzureIoTClient	36:f78f9a56869e	1650	{
AzureIoTClient	41:71c01aa3df1a	1651	int result;
AzureIoTClient	36:f78f9a56869e	1652
AzureIoTClient	41:71c01aa3df1a	1653	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_029: [If `messenger_handle` is NULL, telemetry_messenger_start() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1654	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1655	{
AzureIoTClient	41:71c01aa3df1a	1656	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1657	LogError("telemetry_messenger_start failed (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1658	}
AzureIoTClient	41:71c01aa3df1a	1659	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_030: [If `session_handle` is NULL, telemetry_messenger_start() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1660	else if (session_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1661	{
AzureIoTClient	41:71c01aa3df1a	1662	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1663	LogError("telemetry_messenger_start failed (session_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1664	}
AzureIoTClient	41:71c01aa3df1a	1665	else
AzureIoTClient	41:71c01aa3df1a	1666	{
AzureIoTClient	41:71c01aa3df1a	1667	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1668
AzureIoTClient	41:71c01aa3df1a	1669	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_031: [If `instance->state` is not TELEMETRY_MESSENGER_STATE_STOPPED, telemetry_messenger_start() shall fail and return __FAILURE__]
AzureIoTClient	41:71c01aa3df1a	1670	if (instance->state != TELEMETRY_MESSENGER_STATE_STOPPED)
AzureIoTClient	41:71c01aa3df1a	1671	{
AzureIoTClient	41:71c01aa3df1a	1672	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1673	LogError("telemetry_messenger_start failed (current state is %d; expected TELEMETRY_MESSENGER_STATE_STOPPED)", instance->state);
AzureIoTClient	41:71c01aa3df1a	1674	}
AzureIoTClient	41:71c01aa3df1a	1675	else
AzureIoTClient	41:71c01aa3df1a	1676	{
AzureIoTClient	41:71c01aa3df1a	1677	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_032: [`session_handle` shall be saved on `instance->session_handle`]
AzureIoTClient	41:71c01aa3df1a	1678	instance->session_handle = session_handle;
AzureIoTClient	36:f78f9a56869e	1679
AzureIoTClient	41:71c01aa3df1a	1680	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_115: [If no failures occurr, `instance->state` shall be set to TELEMETRY_MESSENGER_STATE_STARTING, and `instance->on_state_changed_callback` invoked if provided]
AzureIoTClient	41:71c01aa3df1a	1681	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_STARTING);
AzureIoTClient	36:f78f9a56869e	1682
AzureIoTClient	41:71c01aa3df1a	1683	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_056: [If no failures occurr, telemetry_messenger_start() shall return 0]
AzureIoTClient	41:71c01aa3df1a	1684	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1685	}
AzureIoTClient	41:71c01aa3df1a	1686	}
AzureIoTClient	36:f78f9a56869e	1687
AzureIoTClient	41:71c01aa3df1a	1688	return result;
AzureIoTClient	36:f78f9a56869e	1689	}
AzureIoTClient	36:f78f9a56869e	1690
AzureIoTClient	36:f78f9a56869e	1691	int telemetry_messenger_stop(TELEMETRY_MESSENGER_HANDLE messenger_handle)
AzureIoTClient	36:f78f9a56869e	1692	{
AzureIoTClient	41:71c01aa3df1a	1693	int result;
AzureIoTClient	36:f78f9a56869e	1694
AzureIoTClient	41:71c01aa3df1a	1695	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_057: [If `messenger_handle` is NULL, telemetry_messenger_stop() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1696	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1697	{
AzureIoTClient	41:71c01aa3df1a	1698	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1699	LogError("telemetry_messenger_stop failed (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1700	}
AzureIoTClient	41:71c01aa3df1a	1701	else
AzureIoTClient	41:71c01aa3df1a	1702	{
AzureIoTClient	41:71c01aa3df1a	1703	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1704
AzureIoTClient	41:71c01aa3df1a	1705	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_058: [If `instance->state` is TELEMETRY_MESSENGER_STATE_STOPPED, telemetry_messenger_stop() shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	1706	if (instance->state == TELEMETRY_MESSENGER_STATE_STOPPED)
AzureIoTClient	41:71c01aa3df1a	1707	{
AzureIoTClient	41:71c01aa3df1a	1708	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1709	LogError("telemetry_messenger_stop failed (messenger is already stopped)");
AzureIoTClient	41:71c01aa3df1a	1710	}
AzureIoTClient	41:71c01aa3df1a	1711	else
AzureIoTClient	41:71c01aa3df1a	1712	{
AzureIoTClient	41:71c01aa3df1a	1713	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_STOPPING);
AzureIoTClient	36:f78f9a56869e	1714
AzureIoTClient	41:71c01aa3df1a	1715	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_152: [telemetry_messenger_stop() shall close and destroy `instance->message_sender` and `instance->message_receiver`]
AzureIoTClient	41:71c01aa3df1a	1716	destroy_event_sender(instance);
AzureIoTClient	41:71c01aa3df1a	1717	destroy_message_receiver(instance);
AzureIoTClient	36:f78f9a56869e	1718
AzureIoTClient	41:71c01aa3df1a	1719	remove_timed_out_events(instance);
AzureIoTClient	36:f78f9a56869e	1720
AzureIoTClient	41:71c01aa3df1a	1721	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_162: [telemetry_messenger_stop() shall move all items from `instance->in_progress_list` to the beginning of `instance->wait_to_send_list`]
AzureIoTClient	41:71c01aa3df1a	1722	if (move_events_to_wait_to_send_list(instance) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1723	{
AzureIoTClient	41:71c01aa3df1a	1724	LogError("Messenger failed to move events in progress back to wait_to_send list");
AzureIoTClient	41:71c01aa3df1a	1725
AzureIoTClient	41:71c01aa3df1a	1726	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_163: [If not all items from `instance->in_progress_list` can be moved back to `instance->wait_to_send_list`, `instance->state` shall be set to TELEMETRY_MESSENGER_STATE_ERROR, and `instance->on_state_changed_callback` invoked]
AzureIoTClient	41:71c01aa3df1a	1727	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1728	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	1729	}
AzureIoTClient	41:71c01aa3df1a	1730	else
AzureIoTClient	41:71c01aa3df1a	1731	{
AzureIoTClient	41:71c01aa3df1a	1732	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_164: [If all items get successfuly moved back to `instance->wait_to_send_list`, `instance->state` shall be set to TELEMETRY_MESSENGER_STATE_STOPPED, and `instance->on_state_changed_callback` invoked]
AzureIoTClient	41:71c01aa3df1a	1733	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_STOPPED);
AzureIoTClient	41:71c01aa3df1a	1734	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	1735	}
AzureIoTClient	41:71c01aa3df1a	1736	}
AzureIoTClient	41:71c01aa3df1a	1737	}
AzureIoTClient	36:f78f9a56869e	1738
AzureIoTClient	41:71c01aa3df1a	1739	return result;
AzureIoTClient	36:f78f9a56869e	1740	}
AzureIoTClient	36:f78f9a56869e	1741
AzureIoTClient	36:f78f9a56869e	1742	// @brief
AzureIoTClient	36:f78f9a56869e	1743	// Sets the messenger module state based on the state changes from messagesender and messagereceiver
AzureIoTClient	36:f78f9a56869e	1744	static void process_state_changes(TELEMETRY_MESSENGER_INSTANCE* instance)
AzureIoTClient	36:f78f9a56869e	1745	{
AzureIoTClient	41:71c01aa3df1a	1746	// Note: messagesender and messagereceiver are still not created or already destroyed
AzureIoTClient	41:71c01aa3df1a	1747	// when state is TELEMETRY_MESSENGER_STATE_STOPPED, so no checking is needed there.
AzureIoTClient	36:f78f9a56869e	1748
AzureIoTClient	41:71c01aa3df1a	1749	if (instance->state == TELEMETRY_MESSENGER_STATE_STARTED)
AzureIoTClient	41:71c01aa3df1a	1750	{
AzureIoTClient	41:71c01aa3df1a	1751	if (instance->message_sender_current_state != MESSAGE_SENDER_STATE_OPEN)
AzureIoTClient	41:71c01aa3df1a	1752	{
AzureIoTClient	41:71c01aa3df1a	1753	LogError("messagesender reported unexpected state %d while messenger was started", instance->message_sender_current_state);
AzureIoTClient	41:71c01aa3df1a	1754	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1755	}
AzureIoTClient	41:71c01aa3df1a	1756	else if (instance->message_receiver != NULL && instance->message_receiver_current_state != MESSAGE_RECEIVER_STATE_OPEN)
AzureIoTClient	41:71c01aa3df1a	1757	{
AzureIoTClient	41:71c01aa3df1a	1758	if (instance->message_receiver_current_state == MESSAGE_RECEIVER_STATE_OPENING)
AzureIoTClient	41:71c01aa3df1a	1759	{
AzureIoTClient	41:71c01aa3df1a	1760	int is_timed_out;
AzureIoTClient	41:71c01aa3df1a	1761	if (is_timeout_reached(instance->last_message_receiver_state_change_time, MAX_MESSAGE_RECEIVER_STATE_CHANGE_TIMEOUT_SECS, &is_timed_out) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1762	{
AzureIoTClient	41:71c01aa3df1a	1763	LogError("messenger got an error (failed to verify messagereceiver start timeout)");
AzureIoTClient	41:71c01aa3df1a	1764	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1765	}
AzureIoTClient	41:71c01aa3df1a	1766	else if (is_timed_out == 1)
AzureIoTClient	41:71c01aa3df1a	1767	{
AzureIoTClient	41:71c01aa3df1a	1768	LogError("messenger got an error (messagereceiver failed to start within expected timeout (%d secs))", MAX_MESSAGE_RECEIVER_STATE_CHANGE_TIMEOUT_SECS);
AzureIoTClient	41:71c01aa3df1a	1769	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1770	}
AzureIoTClient	41:71c01aa3df1a	1771	}
AzureIoTClient	41:71c01aa3df1a	1772	else if (instance->message_receiver_current_state == MESSAGE_RECEIVER_STATE_ERROR \|\|
AzureIoTClient	41:71c01aa3df1a	1773	instance->message_receiver_current_state == MESSAGE_RECEIVER_STATE_IDLE)
AzureIoTClient	41:71c01aa3df1a	1774	{
AzureIoTClient	41:71c01aa3df1a	1775	LogError("messagereceiver reported unexpected state %d while messenger is starting", instance->message_receiver_current_state);
AzureIoTClient	41:71c01aa3df1a	1776	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1777	}
AzureIoTClient	41:71c01aa3df1a	1778	}
AzureIoTClient	41:71c01aa3df1a	1779	}
AzureIoTClient	41:71c01aa3df1a	1780	else
AzureIoTClient	41:71c01aa3df1a	1781	{
AzureIoTClient	41:71c01aa3df1a	1782	if (instance->state == TELEMETRY_MESSENGER_STATE_STARTING)
AzureIoTClient	41:71c01aa3df1a	1783	{
AzureIoTClient	41:71c01aa3df1a	1784	if (instance->message_sender_current_state == MESSAGE_SENDER_STATE_OPEN)
AzureIoTClient	41:71c01aa3df1a	1785	{
AzureIoTClient	41:71c01aa3df1a	1786	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_STARTED);
AzureIoTClient	41:71c01aa3df1a	1787	}
AzureIoTClient	41:71c01aa3df1a	1788	else if (instance->message_sender_current_state == MESSAGE_SENDER_STATE_OPENING)
AzureIoTClient	41:71c01aa3df1a	1789	{
AzureIoTClient	41:71c01aa3df1a	1790	int is_timed_out;
AzureIoTClient	41:71c01aa3df1a	1791	if (is_timeout_reached(instance->last_message_sender_state_change_time, MAX_MESSAGE_SENDER_STATE_CHANGE_TIMEOUT_SECS, &is_timed_out) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1792	{
AzureIoTClient	41:71c01aa3df1a	1793	LogError("messenger failed to start (failed to verify messagesender start timeout)");
AzureIoTClient	41:71c01aa3df1a	1794	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1795	}
AzureIoTClient	41:71c01aa3df1a	1796	else if (is_timed_out == 1)
AzureIoTClient	41:71c01aa3df1a	1797	{
AzureIoTClient	41:71c01aa3df1a	1798	LogError("messenger failed to start (messagesender failed to start within expected timeout (%d secs))", MAX_MESSAGE_SENDER_STATE_CHANGE_TIMEOUT_SECS);
AzureIoTClient	41:71c01aa3df1a	1799	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1800	}
AzureIoTClient	41:71c01aa3df1a	1801	}
AzureIoTClient	41:71c01aa3df1a	1802	// For this module, the only valid scenario where messagesender state is IDLE is if
AzureIoTClient	41:71c01aa3df1a	1803	// the messagesender hasn't been created yet or already destroyed.
AzureIoTClient	41:71c01aa3df1a	1804	else if ((instance->message_sender_current_state == MESSAGE_SENDER_STATE_ERROR) \|\|
AzureIoTClient	41:71c01aa3df1a	1805	(instance->message_sender_current_state == MESSAGE_SENDER_STATE_CLOSING) \|\|
AzureIoTClient	41:71c01aa3df1a	1806	(instance->message_sender_current_state == MESSAGE_SENDER_STATE_IDLE && instance->message_sender != NULL))
AzureIoTClient	41:71c01aa3df1a	1807	{
AzureIoTClient	41:71c01aa3df1a	1808	LogError("messagesender reported unexpected state %d while messenger is starting", instance->message_sender_current_state);
AzureIoTClient	41:71c01aa3df1a	1809	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1810	}
AzureIoTClient	41:71c01aa3df1a	1811	}
AzureIoTClient	41:71c01aa3df1a	1812	// message sender and receiver are stopped/destroyed synchronously, so no need for state control.
AzureIoTClient	41:71c01aa3df1a	1813	}
AzureIoTClient	36:f78f9a56869e	1814	}
AzureIoTClient	36:f78f9a56869e	1815
AzureIoTClient	36:f78f9a56869e	1816	void telemetry_messenger_do_work(TELEMETRY_MESSENGER_HANDLE messenger_handle)
AzureIoTClient	36:f78f9a56869e	1817	{
AzureIoTClient	41:71c01aa3df1a	1818	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_065: [If `messenger_handle` is NULL, telemetry_messenger_do_work() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	1819	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1820	{
AzureIoTClient	41:71c01aa3df1a	1821	LogError("telemetry_messenger_do_work failed (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1822	}
AzureIoTClient	41:71c01aa3df1a	1823	else
AzureIoTClient	41:71c01aa3df1a	1824	{
AzureIoTClient	41:71c01aa3df1a	1825	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1826
AzureIoTClient	41:71c01aa3df1a	1827	process_state_changes(instance);
AzureIoTClient	36:f78f9a56869e	1828
AzureIoTClient	41:71c01aa3df1a	1829	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_151: [If `instance->state` is TELEMETRY_MESSENGER_STATE_STARTING, telemetry_messenger_do_work() shall create and open `instance->message_sender`]
AzureIoTClient	41:71c01aa3df1a	1830	if (instance->state == TELEMETRY_MESSENGER_STATE_STARTING)
AzureIoTClient	41:71c01aa3df1a	1831	{
AzureIoTClient	41:71c01aa3df1a	1832	if (instance->message_sender == NULL)
AzureIoTClient	41:71c01aa3df1a	1833	{
AzureIoTClient	41:71c01aa3df1a	1834	if (create_event_sender(instance) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1835	{
AzureIoTClient	41:71c01aa3df1a	1836	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1837	}
AzureIoTClient	41:71c01aa3df1a	1838	}
AzureIoTClient	41:71c01aa3df1a	1839	}
AzureIoTClient	41:71c01aa3df1a	1840	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_066: [If `instance->state` is not TELEMETRY_MESSENGER_STATE_STARTED, telemetry_messenger_do_work() shall return]
AzureIoTClient	41:71c01aa3df1a	1841	else if (instance->state == TELEMETRY_MESSENGER_STATE_STARTED)
AzureIoTClient	41:71c01aa3df1a	1842	{
AzureIoTClient	41:71c01aa3df1a	1843	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_067: [If `instance->receive_messages` is true and `instance->message_receiver` is NULL, a message_receiver shall be created]
AzureIoTClient	41:71c01aa3df1a	1844	if (instance->receive_messages == true &&
AzureIoTClient	41:71c01aa3df1a	1845	instance->message_receiver == NULL &&
AzureIoTClient	41:71c01aa3df1a	1846	create_message_receiver(instance) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1847	{
AzureIoTClient	41:71c01aa3df1a	1848	LogError("telemetry_messenger_do_work warning (failed creating the message receiver [%s])", STRING_c_str(instance->device_id));
AzureIoTClient	41:71c01aa3df1a	1849	}
AzureIoTClient	41:71c01aa3df1a	1850	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_092: [If `instance->receive_messages` is false and `instance->message_receiver` is not NULL, it shall be destroyed]
AzureIoTClient	41:71c01aa3df1a	1851	else if (instance->receive_messages == false && instance->message_receiver != NULL)
AzureIoTClient	41:71c01aa3df1a	1852	{
AzureIoTClient	41:71c01aa3df1a	1853	destroy_message_receiver(instance);
AzureIoTClient	41:71c01aa3df1a	1854	}
AzureIoTClient	36:f78f9a56869e	1855
AzureIoTClient	41:71c01aa3df1a	1856	if (process_event_send_timeouts(instance) != RESULT_OK)
AzureIoTClient	41:71c01aa3df1a	1857	{
AzureIoTClient	41:71c01aa3df1a	1858	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1859	}
AzureIoTClient	41:71c01aa3df1a	1860	else if (send_pending_events(instance) != RESULT_OK && instance->event_send_retry_limit > 0)
AzureIoTClient	41:71c01aa3df1a	1861	{
AzureIoTClient	41:71c01aa3df1a	1862	instance->event_send_error_count++;
AzureIoTClient	36:f78f9a56869e	1863
AzureIoTClient	41:71c01aa3df1a	1864	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_161: [If telemetry_messenger_do_work() fail sending events for `instance->event_send_retry_limit` times in a row, it shall invoke `instance->on_state_changed_callback`, if provided, with error code TELEMETRY_MESSENGER_STATE_ERROR]
AzureIoTClient	41:71c01aa3df1a	1865	if (instance->event_send_error_count >= instance->event_send_retry_limit)
AzureIoTClient	41:71c01aa3df1a	1866	{
AzureIoTClient	41:71c01aa3df1a	1867	LogError("telemetry_messenger_do_work failed (failed sending events; reached max number of consecutive attempts)");
AzureIoTClient	41:71c01aa3df1a	1868	update_messenger_state(instance, TELEMETRY_MESSENGER_STATE_ERROR);
AzureIoTClient	41:71c01aa3df1a	1869	}
AzureIoTClient	41:71c01aa3df1a	1870	}
AzureIoTClient	41:71c01aa3df1a	1871	else
AzureIoTClient	41:71c01aa3df1a	1872	{
AzureIoTClient	41:71c01aa3df1a	1873	instance->event_send_error_count = 0;
AzureIoTClient	41:71c01aa3df1a	1874	}
AzureIoTClient	41:71c01aa3df1a	1875	}
AzureIoTClient	41:71c01aa3df1a	1876	}
AzureIoTClient	36:f78f9a56869e	1877	}
AzureIoTClient	36:f78f9a56869e	1878
AzureIoTClient	36:f78f9a56869e	1879	void telemetry_messenger_destroy(TELEMETRY_MESSENGER_HANDLE messenger_handle)
AzureIoTClient	36:f78f9a56869e	1880	{
AzureIoTClient	41:71c01aa3df1a	1881	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_109: [If `messenger_handle` is NULL, telemetry_messenger_destroy() shall fail and return]
AzureIoTClient	41:71c01aa3df1a	1882	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	1883	{
AzureIoTClient	41:71c01aa3df1a	1884	LogError("telemetry_messenger_destroy failed (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	1885	}
AzureIoTClient	41:71c01aa3df1a	1886	else
AzureIoTClient	41:71c01aa3df1a	1887	{
AzureIoTClient	41:71c01aa3df1a	1888	LIST_ITEM_HANDLE list_node;
AzureIoTClient	41:71c01aa3df1a	1889	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	1890
AzureIoTClient	41:71c01aa3df1a	1891	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_110: [If the `instance->state` is not TELEMETRY_MESSENGER_STATE_STOPPED, telemetry_messenger_destroy() shall invoke telemetry_messenger_stop()]
AzureIoTClient	41:71c01aa3df1a	1892	if (instance->state != TELEMETRY_MESSENGER_STATE_STOPPED)
AzureIoTClient	41:71c01aa3df1a	1893	{
AzureIoTClient	41:71c01aa3df1a	1894	(void)telemetry_messenger_stop(messenger_handle);
AzureIoTClient	41:71c01aa3df1a	1895	}
AzureIoTClient	36:f78f9a56869e	1896
AzureIoTClient	41:71c01aa3df1a	1897	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_111: [All elements of `instance->in_progress_list` and `instance->wait_to_send_list` shall be removed, invoking `task->on_event_send_complete_callback` for each with EVENT_SEND_COMPLETE_RESULT_MESSENGER_DESTROYED]
AzureIoTClient	36:f78f9a56869e	1898
AzureIoTClient	41:71c01aa3df1a	1899	// Note: yes telemetry_messenger_stop() tried to move all events from in_progress_list to wait_to_send_list,
AzureIoTClient	41:71c01aa3df1a	1900	// but we need to iterate through in case any events failed to be moved.
AzureIoTClient	41:71c01aa3df1a	1901	while ((list_node = singlylinkedlist_get_head_item(instance->in_progress_list)) != NULL)
AzureIoTClient	41:71c01aa3df1a	1902	{
AzureIoTClient	41:71c01aa3df1a	1903	MESSENGER_SEND_EVENT_TASK* task = (MESSENGER_SEND_EVENT_TASK*)singlylinkedlist_item_get_value(list_node);
AzureIoTClient	36:f78f9a56869e	1904
AzureIoTClient	41:71c01aa3df1a	1905	(void)singlylinkedlist_remove(instance->in_progress_list, list_node);
AzureIoTClient	36:f78f9a56869e	1906
AzureIoTClient	41:71c01aa3df1a	1907	if (task != NULL)
AzureIoTClient	41:71c01aa3df1a	1908	{
AzureIoTClient	41:71c01aa3df1a	1909	singlylinkedlist_foreach(task->callback_list, invoke_callback, (void*)TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_MESSENGER_DESTROYED);
AzureIoTClient	41:71c01aa3df1a	1910	free_task(task);
AzureIoTClient	41:71c01aa3df1a	1911	}
AzureIoTClient	41:71c01aa3df1a	1912	}
AzureIoTClient	36:f78f9a56869e	1913
AzureIoTClient	41:71c01aa3df1a	1914	while ((list_node = singlylinkedlist_get_head_item(instance->waiting_to_send)) != NULL)
AzureIoTClient	41:71c01aa3df1a	1915	{
AzureIoTClient	41:71c01aa3df1a	1916	MESSENGER_SEND_EVENT_CALLER_INFORMATION* caller_info = (MESSENGER_SEND_EVENT_CALLER_INFORMATION*)singlylinkedlist_item_get_value(list_node);
AzureIoTClient	36:f78f9a56869e	1917
AzureIoTClient	41:71c01aa3df1a	1918	(void)singlylinkedlist_remove(instance->waiting_to_send, list_node);
AzureIoTClient	36:f78f9a56869e	1919
AzureIoTClient	41:71c01aa3df1a	1920	if (caller_info != NULL)
AzureIoTClient	41:71c01aa3df1a	1921	{
AzureIoTClient	41:71c01aa3df1a	1922	caller_info->on_event_send_complete_callback(caller_info->message, TELEMETRY_MESSENGER_EVENT_SEND_COMPLETE_RESULT_MESSENGER_DESTROYED, (void*)caller_info->context);
AzureIoTClient	41:71c01aa3df1a	1923	free(caller_info);
AzureIoTClient	41:71c01aa3df1a	1924	}
AzureIoTClient	41:71c01aa3df1a	1925	}
AzureIoTClient	36:f78f9a56869e	1926
AzureIoTClient	41:71c01aa3df1a	1927	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_150: [`instance->in_progress_list` and `instance->wait_to_send_list` shall be destroyed using singlylinkedlist_destroy()]
AzureIoTClient	41:71c01aa3df1a	1928	singlylinkedlist_destroy(instance->waiting_to_send);
AzureIoTClient	41:71c01aa3df1a	1929	singlylinkedlist_destroy(instance->in_progress_list);
AzureIoTClient	36:f78f9a56869e	1930
AzureIoTClient	41:71c01aa3df1a	1931	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_112: [`instance->iothub_host_fqdn` shall be destroyed using STRING_delete()]
AzureIoTClient	41:71c01aa3df1a	1932	STRING_delete(instance->iothub_host_fqdn);
AzureIoTClient	41:71c01aa3df1a	1933
AzureIoTClient	41:71c01aa3df1a	1934	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_113: [`instance->device_id` shall be destroyed using STRING_delete()]
AzureIoTClient	41:71c01aa3df1a	1935	STRING_delete(instance->device_id);
AzureIoTClient	36:f78f9a56869e	1936
AzureIoTClient	36:f78f9a56869e	1937	STRING_delete(instance->product_info);
AzureIoTClient	36:f78f9a56869e	1938
AzureIoTClient	41:71c01aa3df1a	1939	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_114: [telemetry_messenger_destroy() shall destroy `instance` with free()]
AzureIoTClient	41:71c01aa3df1a	1940	(void)free(instance);
AzureIoTClient	41:71c01aa3df1a	1941	}
AzureIoTClient	36:f78f9a56869e	1942	}
AzureIoTClient	36:f78f9a56869e	1943
AzureIoTClient	36:f78f9a56869e	1944	TELEMETRY_MESSENGER_HANDLE telemetry_messenger_create(const TELEMETRY_MESSENGER_CONFIG* messenger_config, const char* product_info)
AzureIoTClient	36:f78f9a56869e	1945	{
AzureIoTClient	41:71c01aa3df1a	1946	TELEMETRY_MESSENGER_HANDLE handle;
AzureIoTClient	36:f78f9a56869e	1947
AzureIoTClient	41:71c01aa3df1a	1948	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_001: [If parameter `messenger_config` is NULL, telemetry_messenger_create() shall return NULL]
AzureIoTClient	41:71c01aa3df1a	1949	if (messenger_config == NULL)
AzureIoTClient	41:71c01aa3df1a	1950	{
AzureIoTClient	41:71c01aa3df1a	1951	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	1952	LogError("telemetry_messenger_create failed (messenger_config is NULL)");
AzureIoTClient	41:71c01aa3df1a	1953	}
AzureIoTClient	41:71c01aa3df1a	1954	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_002: [If `messenger_config->device_id` is NULL, telemetry_messenger_create() shall return NULL]
AzureIoTClient	41:71c01aa3df1a	1955	else if (messenger_config->device_id == NULL)
AzureIoTClient	41:71c01aa3df1a	1956	{
AzureIoTClient	41:71c01aa3df1a	1957	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	1958	LogError("telemetry_messenger_create failed (messenger_config->device_id is NULL)");
AzureIoTClient	41:71c01aa3df1a	1959	}
AzureIoTClient	41:71c01aa3df1a	1960	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_003: [If `messenger_config->iothub_host_fqdn` is NULL, telemetry_messenger_create() shall return NULL]
AzureIoTClient	41:71c01aa3df1a	1961	else if (messenger_config->iothub_host_fqdn == NULL)
AzureIoTClient	41:71c01aa3df1a	1962	{
AzureIoTClient	41:71c01aa3df1a	1963	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	1964	LogError("telemetry_messenger_create failed (messenger_config->iothub_host_fqdn is NULL)");
AzureIoTClient	41:71c01aa3df1a	1965	}
AzureIoTClient	41:71c01aa3df1a	1966	else
AzureIoTClient	41:71c01aa3df1a	1967	{
AzureIoTClient	41:71c01aa3df1a	1968	TELEMETRY_MESSENGER_INSTANCE* instance;
AzureIoTClient	36:f78f9a56869e	1969
AzureIoTClient	41:71c01aa3df1a	1970	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_006: [telemetry_messenger_create() shall allocate memory for the messenger instance structure (aka `instance`)]
AzureIoTClient	41:71c01aa3df1a	1971	if ((instance = (TELEMETRY_MESSENGER_INSTANCE*)malloc(sizeof(TELEMETRY_MESSENGER_INSTANCE))) == NULL)
AzureIoTClient	41:71c01aa3df1a	1972	{
AzureIoTClient	41:71c01aa3df1a	1973	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_007: [If malloc() fails, telemetry_messenger_create() shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	1974	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	1975	LogError("telemetry_messenger_create failed (messenger_config->wait_to_send_list is NULL)");
AzureIoTClient	41:71c01aa3df1a	1976	}
AzureIoTClient	41:71c01aa3df1a	1977	else
AzureIoTClient	41:71c01aa3df1a	1978	{
AzureIoTClient	41:71c01aa3df1a	1979	memset(instance, 0, sizeof(TELEMETRY_MESSENGER_INSTANCE));
AzureIoTClient	41:71c01aa3df1a	1980	instance->state = TELEMETRY_MESSENGER_STATE_STOPPED;
AzureIoTClient	41:71c01aa3df1a	1981	instance->message_sender_current_state = MESSAGE_SENDER_STATE_IDLE;
AzureIoTClient	41:71c01aa3df1a	1982	instance->message_sender_previous_state = MESSAGE_SENDER_STATE_IDLE;
AzureIoTClient	41:71c01aa3df1a	1983	instance->message_receiver_current_state = MESSAGE_RECEIVER_STATE_IDLE;
AzureIoTClient	41:71c01aa3df1a	1984	instance->message_receiver_previous_state = MESSAGE_RECEIVER_STATE_IDLE;
AzureIoTClient	41:71c01aa3df1a	1985	instance->event_send_retry_limit = DEFAULT_EVENT_SEND_RETRY_LIMIT;
AzureIoTClient	41:71c01aa3df1a	1986	instance->event_send_timeout_secs = DEFAULT_EVENT_SEND_TIMEOUT_SECS;
AzureIoTClient	41:71c01aa3df1a	1987	instance->last_message_sender_state_change_time = INDEFINITE_TIME;
AzureIoTClient	41:71c01aa3df1a	1988	instance->last_message_receiver_state_change_time = INDEFINITE_TIME;
AzureIoTClient	36:f78f9a56869e	1989
AzureIoTClient	41:71c01aa3df1a	1990	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_008: [telemetry_messenger_create() shall save a copy of `messenger_config->device_id` into `instance->device_id`]
AzureIoTClient	41:71c01aa3df1a	1991	if ((instance->device_id = STRING_construct(messenger_config->device_id)) == NULL)
AzureIoTClient	41:71c01aa3df1a	1992	{
AzureIoTClient	41:71c01aa3df1a	1993	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_009: [If STRING_construct() fails, telemetry_messenger_create() shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	1994	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	1995	LogError("telemetry_messenger_create failed (device_id could not be copied; STRING_construct failed)");
AzureIoTClient	41:71c01aa3df1a	1996	}
AzureIoTClient	36:f78f9a56869e	1997	else if ((instance->product_info = STRING_construct(product_info)) == NULL)
AzureIoTClient	36:f78f9a56869e	1998	{
AzureIoTClient	36:f78f9a56869e	1999	handle = NULL;
AzureIoTClient	36:f78f9a56869e	2000	LogError("telemetry_messenger_create failed (product_info could not be copied; STRING_construct failed)");
AzureIoTClient	36:f78f9a56869e	2001	}
AzureIoTClient	41:71c01aa3df1a	2002	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_010: [telemetry_messenger_create() shall save a copy of `messenger_config->iothub_host_fqdn` into `instance->iothub_host_fqdn`]
AzureIoTClient	41:71c01aa3df1a	2003	else if ((instance->iothub_host_fqdn = STRING_construct(messenger_config->iothub_host_fqdn)) == NULL)
AzureIoTClient	41:71c01aa3df1a	2004	{
AzureIoTClient	41:71c01aa3df1a	2005	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_011: [If STRING_construct() fails, telemetry_messenger_create() shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	2006	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	2007	LogError("telemetry_messenger_create failed (iothub_host_fqdn could not be copied; STRING_construct failed)");
AzureIoTClient	41:71c01aa3df1a	2008	}
AzureIoTClient	41:71c01aa3df1a	2009	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_165: [`instance->wait_to_send_list` shall be set using singlylinkedlist_create()]
AzureIoTClient	41:71c01aa3df1a	2010	else if ((instance->waiting_to_send = singlylinkedlist_create()) == NULL)
AzureIoTClient	41:71c01aa3df1a	2011	{
AzureIoTClient	41:71c01aa3df1a	2012	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_166: [If singlylinkedlist_create() fails, telemetry_messenger_create() shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	2013	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	2014	LogError("telemetry_messenger_create failed (singlylinkedlist_create failed to create wait_to_send_list)");
AzureIoTClient	41:71c01aa3df1a	2015	}
AzureIoTClient	41:71c01aa3df1a	2016	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_132: [`instance->in_progress_list` shall be set using singlylinkedlist_create()]
AzureIoTClient	41:71c01aa3df1a	2017	else if ((instance->in_progress_list = singlylinkedlist_create()) == NULL)
AzureIoTClient	41:71c01aa3df1a	2018	{
AzureIoTClient	41:71c01aa3df1a	2019	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_133: [If singlylinkedlist_create() fails, telemetry_messenger_create() shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	2020	handle = NULL;
AzureIoTClient	41:71c01aa3df1a	2021	LogError("telemetry_messenger_create failed (singlylinkedlist_create failed to create in_progress_list)");
AzureIoTClient	41:71c01aa3df1a	2022	}
AzureIoTClient	41:71c01aa3df1a	2023	else
AzureIoTClient	41:71c01aa3df1a	2024	{
AzureIoTClient	41:71c01aa3df1a	2025	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_013: [`messenger_config->on_state_changed_callback` shall be saved into `instance->on_state_changed_callback`]
AzureIoTClient	41:71c01aa3df1a	2026	instance->on_state_changed_callback = messenger_config->on_state_changed_callback;
AzureIoTClient	36:f78f9a56869e	2027
AzureIoTClient	41:71c01aa3df1a	2028	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_014: [`messenger_config->on_state_changed_context` shall be saved into `instance->on_state_changed_context`]
AzureIoTClient	41:71c01aa3df1a	2029	instance->on_state_changed_context = messenger_config->on_state_changed_context;
AzureIoTClient	36:f78f9a56869e	2030
AzureIoTClient	41:71c01aa3df1a	2031	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_015: [If no failures occurr, telemetry_messenger_create() shall return a handle to `instance`]
AzureIoTClient	41:71c01aa3df1a	2032	handle = (TELEMETRY_MESSENGER_HANDLE)instance;
AzureIoTClient	41:71c01aa3df1a	2033	}
AzureIoTClient	41:71c01aa3df1a	2034	}
AzureIoTClient	36:f78f9a56869e	2035
AzureIoTClient	41:71c01aa3df1a	2036	if (handle == NULL)
AzureIoTClient	41:71c01aa3df1a	2037	{
AzureIoTClient	41:71c01aa3df1a	2038	telemetry_messenger_destroy((TELEMETRY_MESSENGER_HANDLE)instance);
AzureIoTClient	41:71c01aa3df1a	2039	}
AzureIoTClient	41:71c01aa3df1a	2040	}
AzureIoTClient	36:f78f9a56869e	2041
AzureIoTClient	41:71c01aa3df1a	2042	return handle;
AzureIoTClient	36:f78f9a56869e	2043	}
AzureIoTClient	36:f78f9a56869e	2044
AzureIoTClient	36:f78f9a56869e	2045	int telemetry_messenger_set_option(TELEMETRY_MESSENGER_HANDLE messenger_handle, const char* name, void* value)
AzureIoTClient	36:f78f9a56869e	2046	{
AzureIoTClient	41:71c01aa3df1a	2047	int result;
AzureIoTClient	36:f78f9a56869e	2048
AzureIoTClient	41:71c01aa3df1a	2049	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_167: [If `messenger_handle` or `name` or `value` is NULL, telemetry_messenger_set_option shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	2050	if (messenger_handle == NULL \|\| name == NULL \|\| value == NULL)
AzureIoTClient	41:71c01aa3df1a	2051	{
AzureIoTClient	41:71c01aa3df1a	2052	LogError("telemetry_messenger_set_option failed (one of the followin are NULL: messenger_handle=%p, name=%p, value=%p)",
AzureIoTClient	41:71c01aa3df1a	2053	messenger_handle, name, value);
AzureIoTClient	41:71c01aa3df1a	2054	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	2055	}
AzureIoTClient	41:71c01aa3df1a	2056	else
AzureIoTClient	41:71c01aa3df1a	2057	{
AzureIoTClient	41:71c01aa3df1a	2058	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	2059
AzureIoTClient	41:71c01aa3df1a	2060	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_168: [If name matches MESSENGER_OPTION_EVENT_SEND_TIMEOUT_SECS, `value` shall be saved on `instance->event_send_timeout_secs`]
AzureIoTClient	41:71c01aa3df1a	2061	if (strcmp(MESSENGER_OPTION_EVENT_SEND_TIMEOUT_SECS, name) == 0)
AzureIoTClient	41:71c01aa3df1a	2062	{
AzureIoTClient	41:71c01aa3df1a	2063	instance->event_send_timeout_secs = ((size_t)value);
AzureIoTClient	41:71c01aa3df1a	2064	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	2065	}
AzureIoTClient	41:71c01aa3df1a	2066	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_169: [If name matches MESSENGER_OPTION_SAVED_OPTIONS, `value` shall be applied using OptionHandler_FeedOptions]
AzureIoTClient	41:71c01aa3df1a	2067	else if (strcmp(MESSENGER_OPTION_SAVED_OPTIONS, name) == 0)
AzureIoTClient	41:71c01aa3df1a	2068	{
AzureIoTClient	41:71c01aa3df1a	2069	if (OptionHandler_FeedOptions((OPTIONHANDLER_HANDLE)value, messenger_handle) != OPTIONHANDLER_OK)
AzureIoTClient	41:71c01aa3df1a	2070	{
AzureIoTClient	41:71c01aa3df1a	2071	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_170: [If OptionHandler_FeedOptions fails, telemetry_messenger_set_option shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	2072	LogError("telemetry_messenger_set_option failed (OptionHandler_FeedOptions failed)");
AzureIoTClient	41:71c01aa3df1a	2073	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	2074	}
AzureIoTClient	41:71c01aa3df1a	2075	else
AzureIoTClient	41:71c01aa3df1a	2076	{
AzureIoTClient	41:71c01aa3df1a	2077	result = RESULT_OK;
AzureIoTClient	41:71c01aa3df1a	2078	}
AzureIoTClient	41:71c01aa3df1a	2079	}
AzureIoTClient	41:71c01aa3df1a	2080	else
AzureIoTClient	41:71c01aa3df1a	2081	{
AzureIoTClient	41:71c01aa3df1a	2082	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_171: [If name does not match any supported option, authentication_set_option shall fail and return a non-zero value]
AzureIoTClient	41:71c01aa3df1a	2083	LogError("telemetry_messenger_set_option failed (option with name '%s' is not suppported)", name);
AzureIoTClient	41:71c01aa3df1a	2084	result = __FAILURE__;
AzureIoTClient	41:71c01aa3df1a	2085	}
AzureIoTClient	41:71c01aa3df1a	2086	}
AzureIoTClient	36:f78f9a56869e	2087
AzureIoTClient	41:71c01aa3df1a	2088	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_172: [If no errors occur, telemetry_messenger_set_option shall return 0]
AzureIoTClient	41:71c01aa3df1a	2089	return result;
AzureIoTClient	36:f78f9a56869e	2090	}
AzureIoTClient	36:f78f9a56869e	2091
AzureIoTClient	36:f78f9a56869e	2092	OPTIONHANDLER_HANDLE telemetry_messenger_retrieve_options(TELEMETRY_MESSENGER_HANDLE messenger_handle)
AzureIoTClient	36:f78f9a56869e	2093	{
AzureIoTClient	41:71c01aa3df1a	2094	OPTIONHANDLER_HANDLE result;
AzureIoTClient	36:f78f9a56869e	2095
AzureIoTClient	41:71c01aa3df1a	2096	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_173: [If `messenger_handle` is NULL, telemetry_messenger_retrieve_options shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	2097	if (messenger_handle == NULL)
AzureIoTClient	41:71c01aa3df1a	2098	{
AzureIoTClient	41:71c01aa3df1a	2099	LogError("Failed to retrieve options from messenger instance (messenger_handle is NULL)");
AzureIoTClient	41:71c01aa3df1a	2100	result = NULL;
AzureIoTClient	41:71c01aa3df1a	2101	}
AzureIoTClient	41:71c01aa3df1a	2102	else
AzureIoTClient	41:71c01aa3df1a	2103	{
AzureIoTClient	41:71c01aa3df1a	2104	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_174: [An OPTIONHANDLER_HANDLE instance shall be created using OptionHandler_Create]
AzureIoTClient	41:71c01aa3df1a	2105	OPTIONHANDLER_HANDLE options = OptionHandler_Create(telemetry_messenger_clone_option, telemetry_messenger_destroy_option, (pfSetOption)telemetry_messenger_set_option);
AzureIoTClient	36:f78f9a56869e	2106
AzureIoTClient	41:71c01aa3df1a	2107	if (options == NULL)
AzureIoTClient	41:71c01aa3df1a	2108	{
AzureIoTClient	41:71c01aa3df1a	2109	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_175: [If an OPTIONHANDLER_HANDLE instance fails to be created, telemetry_messenger_retrieve_options shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	2110	LogError("Failed to retrieve options from messenger instance (OptionHandler_Create failed)");
AzureIoTClient	41:71c01aa3df1a	2111	result = NULL;
AzureIoTClient	41:71c01aa3df1a	2112	}
AzureIoTClient	41:71c01aa3df1a	2113	else
AzureIoTClient	41:71c01aa3df1a	2114	{
AzureIoTClient	41:71c01aa3df1a	2115	TELEMETRY_MESSENGER_INSTANCE* instance = (TELEMETRY_MESSENGER_INSTANCE*)messenger_handle;
AzureIoTClient	36:f78f9a56869e	2116
AzureIoTClient	41:71c01aa3df1a	2117	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_176: [Each option of `instance` shall be added to the OPTIONHANDLER_HANDLE instance using OptionHandler_AddOption]
AzureIoTClient	41:71c01aa3df1a	2118	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_177: [If OptionHandler_AddOption fails, telemetry_messenger_retrieve_options shall fail and return NULL]
AzureIoTClient	41:71c01aa3df1a	2119	if (OptionHandler_AddOption(options, MESSENGER_OPTION_EVENT_SEND_TIMEOUT_SECS, (void*)&instance->event_send_timeout_secs) != OPTIONHANDLER_OK)
AzureIoTClient	41:71c01aa3df1a	2120	{
AzureIoTClient	41:71c01aa3df1a	2121	LogError("Failed to retrieve options from messenger instance (OptionHandler_Create failed for option '%s')", MESSENGER_OPTION_EVENT_SEND_TIMEOUT_SECS);
AzureIoTClient	41:71c01aa3df1a	2122	result = NULL;
AzureIoTClient	41:71c01aa3df1a	2123	}
AzureIoTClient	41:71c01aa3df1a	2124	else
AzureIoTClient	41:71c01aa3df1a	2125	{
AzureIoTClient	41:71c01aa3df1a	2126	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_179: [If no failures occur, telemetry_messenger_retrieve_options shall return the OPTIONHANDLER_HANDLE instance]
AzureIoTClient	41:71c01aa3df1a	2127	result = options;
AzureIoTClient	41:71c01aa3df1a	2128	}
AzureIoTClient	36:f78f9a56869e	2129
AzureIoTClient	41:71c01aa3df1a	2130	if (result == NULL)
AzureIoTClient	41:71c01aa3df1a	2131	{
AzureIoTClient	41:71c01aa3df1a	2132	// Codes_SRS_IOTHUBTRANSPORT_AMQP_MESSENGER_09_178: [If telemetry_messenger_retrieve_options fails, any allocated memory shall be freed]
AzureIoTClient	41:71c01aa3df1a	2133	OptionHandler_Destroy(options);
AzureIoTClient	41:71c01aa3df1a	2134	}
AzureIoTClient	41:71c01aa3df1a	2135	}
AzureIoTClient	41:71c01aa3df1a	2136	}
AzureIoTClient	36:f78f9a56869e	2137
AzureIoTClient	41:71c01aa3df1a	2138	return result;
AzureIoTClient	36:f78f9a56869e	2139	}

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Type:	Library
Created:	15 Sep 2015
Imports:	80
Forks:	0
Commits:	58
Dependents:	6
Dependencies:	0
Followers:	7

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Azure IoT

Dan Cristoloveanu

The code in this repository is MIT licensed.

iothubtransport_amqp_telemetry_messenger.c@50:f3a92c6c6534, 2018-03-05 (annotated)

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