Azure IoT
A small footprint MQTT library
Dependents: STM32F746_iothub_client_sample_mqtt FXOS8700CQ_To_Azure_IoT f767zi_mqtt FXOS8700CQ_To_Azure_IoT ... more
mqtt_client.c
- Committer:
- AzureIoTClient
- Date:
- 2018-10-04
- Revision:
- 30:712bcbf21afa
- Parent:
- 29:7bb0aae34648
File content as of revision 30:712bcbf21afa:
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
#include <stdlib.h>
#include "azure_c_shared_utility/optimize_size.h"
#include "azure_c_shared_utility/gballoc.h"
#include "azure_c_shared_utility/platform.h"
#include "azure_c_shared_utility/tickcounter.h"
#include "azure_c_shared_utility/crt_abstractions.h"
#include "azure_c_shared_utility/xlogging.h"
#include "azure_c_shared_utility/strings.h"
#include "azure_c_shared_utility/agenttime.h"
#include "azure_c_shared_utility/threadapi.h"
#include "azure_umqtt_c/mqtt_client.h"
#include "azure_umqtt_c/mqtt_codec.h"
#include <inttypes.h>
#define VARIABLE_HEADER_OFFSET 2
#define RETAIN_FLAG_MASK 0x1
#define QOS_LEAST_ONCE_FLAG_MASK 0x2
#define QOS_EXACTLY_ONCE_FLAG_MASK 0x4
#define DUPLICATE_FLAG_MASK 0x8
#define CONNECT_PACKET_MASK 0xf0
#define TIME_MAX_BUFFER 16
#define DEFAULT_MAX_PING_RESPONSE_TIME 80 // % of time to send pings
#define MAX_CLOSE_RETRIES 2
static const char* const TRUE_CONST = "true";
static const char* const FALSE_CONST = "false";
DEFINE_ENUM_STRINGS(QOS_VALUE, QOS_VALUE_VALUES);
typedef struct MQTT_CLIENT_TAG
{
XIO_HANDLE xioHandle;
MQTTCODEC_HANDLE codec_handle;
CONTROL_PACKET_TYPE packetState;
TICK_COUNTER_HANDLE packetTickCntr;
tickcounter_ms_t packetSendTimeMs;
ON_MQTT_OPERATION_CALLBACK fnOperationCallback;
ON_MQTT_MESSAGE_RECV_CALLBACK fnMessageRecv;
void* ctx;
ON_MQTT_ERROR_CALLBACK fnOnErrorCallBack;
void* errorCBCtx;
ON_MQTT_DISCONNECTED_CALLBACK disconnect_cb;
void* disconnect_ctx;
QOS_VALUE qosValue;
uint16_t keepAliveInterval;
MQTT_CLIENT_OPTIONS mqttOptions;
bool clientConnected;
bool socketConnected;
bool logTrace;
bool rawBytesTrace;
tickcounter_ms_t timeSincePing;
uint16_t maxPingRespTime;
} MQTT_CLIENT;
static void on_connection_closed(void* context)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)context;
if (mqtt_client != NULL)
{
mqtt_client->socketConnected = false;
mqtt_client->clientConnected = false;
if (mqtt_client->disconnect_cb)
{
mqtt_client->disconnect_cb(mqtt_client->disconnect_ctx);
}
}
}
static void close_connection(MQTT_CLIENT* mqtt_client)
{
if (mqtt_client->socketConnected)
{
(void)xio_close(mqtt_client->xioHandle, on_connection_closed, mqtt_client);
if (mqtt_client->disconnect_cb == NULL)
{
size_t counter = 0;
do
{
xio_dowork(mqtt_client->xioHandle);
counter++;
ThreadAPI_Sleep(2);
} while (mqtt_client->clientConnected && counter < MAX_CLOSE_RETRIES);
}
}
else
{
if (mqtt_client->disconnect_cb)
{
mqtt_client->disconnect_cb(mqtt_client->disconnect_ctx);
}
}
mqtt_client->xioHandle = NULL;
}
static void set_error_callback(MQTT_CLIENT* mqtt_client, MQTT_CLIENT_EVENT_ERROR error_type)
{
if (mqtt_client->fnOnErrorCallBack)
{
mqtt_client->fnOnErrorCallBack(mqtt_client, error_type, mqtt_client->errorCBCtx);
}
close_connection(mqtt_client);
}
static STRING_HANDLE construct_trace_log_handle(MQTT_CLIENT* mqtt_client)
{
STRING_HANDLE trace_log;
if (mqtt_client->logTrace)
{
trace_log = STRING_new();
}
else
{
trace_log = NULL;
}
return trace_log;
}
static uint16_t byteutil_read_uint16(uint8_t** buffer, size_t len)
{
uint16_t result = 0;
if (buffer != NULL && *buffer != NULL && len >= 2)
{
result = 256 * (**buffer) + (*(*buffer + 1));
*buffer += 2; // Move the ptr
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "byteutil_read_uint16 == NULL or less than 2");
}
return result;
}
static char* byteutil_readUTF(uint8_t** buffer, size_t* byteLen)
{
char* result = NULL;
if (buffer != NULL)
{
// Get the length of the string
uint16_t len = byteutil_read_uint16(buffer, *byteLen);
if (len > 0)
{
result = (char*)malloc(len + 1);
if (result != NULL)
{
(void)memcpy(result, *buffer, len);
result[len] = '\0';
*buffer += len;
if (byteLen != NULL)
{
*byteLen = len;
}
}
}
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "readByte buffer == NULL.");
}
return result;
}
static uint8_t byteutil_readByte(uint8_t** buffer)
{
uint8_t result = 0;
if (buffer != NULL)
{
result = **buffer;
(*buffer)++;
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "readByte buffer == NULL.");
}
return result;
}
static void sendComplete(void* context, IO_SEND_RESULT send_result)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)context;
if (mqtt_client != NULL)
{
if (send_result == IO_SEND_OK)
{
if (mqtt_client->packetState == DISCONNECT_TYPE)
{
/*Codes_SRS_MQTT_CLIENT_07_032: [If the actionResult parameter is of type MQTT_CLIENT_ON_DISCONNECT the the msgInfo value shall be NULL.]*/
if (mqtt_client->fnOperationCallback != NULL)
{
mqtt_client->fnOperationCallback(mqtt_client, MQTT_CLIENT_ON_DISCONNECT, NULL, mqtt_client->ctx);
}
// close the xio
close_connection(mqtt_client);
}
}
else if (send_result == IO_SEND_ERROR)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "MQTT Send Complete Failure send_result: %d", (int)send_result);
set_error_callback(mqtt_client, MQTT_CLIENT_COMMUNICATION_ERROR);
}
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "MQTT Send Complete Failure with NULL mqtt_client");
}
}
#ifndef NO_LOGGING
static const char* retrievePacketType(CONTROL_PACKET_TYPE packet)
{
switch (packet&CONNECT_PACKET_MASK)
{
case CONNECT_TYPE: return "CONNECT";
case CONNACK_TYPE: return "CONNACK";
case PUBLISH_TYPE: return "PUBLISH";
case PUBACK_TYPE: return "PUBACK";
case PUBREC_TYPE: return "PUBREC";
case PUBREL_TYPE: return "PUBREL";
case SUBSCRIBE_TYPE: return "SUBSCRIBE";
case SUBACK_TYPE: return "SUBACK";
case UNSUBSCRIBE_TYPE: return "UNSUBSCRIBE";
case UNSUBACK_TYPE: return "UNSUBACK";
case PINGREQ_TYPE: return "PINGREQ";
case PINGRESP_TYPE: return "PINGRESP";
case DISCONNECT_TYPE: return "DISCONNECT";
default:
case PACKET_TYPE_ERROR:
case UNKNOWN_TYPE:
return "UNKNOWN";
}
}
#endif // NO_LOGGING
static void getLogTime(char* timeResult, size_t len)
{
if (timeResult != NULL)
{
time_t agent_time = get_time(NULL);
if (agent_time == (time_t)-1)
{
timeResult[0] = '\0';
}
else
{
struct tm* tmInfo = localtime(&agent_time);
if (tmInfo == NULL)
{
timeResult[0] = '\0';
}
else
{
if (strftime(timeResult, len, "%H:%M:%S", tmInfo) == 0)
{
timeResult[0] = '\0';
}
}
}
}
}
static void log_outgoing_trace(MQTT_CLIENT* mqtt_client, STRING_HANDLE trace_log)
{
if (mqtt_client != NULL && mqtt_client->logTrace && trace_log != NULL)
{
char tmBuffer[TIME_MAX_BUFFER];
getLogTime(tmBuffer, TIME_MAX_BUFFER);
LOG(AZ_LOG_TRACE, LOG_LINE, "-> %s %s", tmBuffer, STRING_c_str(trace_log));
}
}
static void logOutgoingRawTrace(MQTT_CLIENT* mqtt_client, const uint8_t* data, size_t length)
{
if (mqtt_client != NULL && data != NULL && length > 0 && mqtt_client->rawBytesTrace)
{
char tmBuffer[TIME_MAX_BUFFER];
getLogTime(tmBuffer, TIME_MAX_BUFFER);
LOG(AZ_LOG_TRACE, 0, "-> %s %s: ", tmBuffer, retrievePacketType((unsigned char)data[0]));
size_t index = 0;
for (index = 0; index < length; index++)
{
LOG(AZ_LOG_TRACE, 0, "0x%02x ", data[index]);
}
LOG(AZ_LOG_TRACE, LOG_LINE, "");
}
}
static void log_incoming_trace(MQTT_CLIENT* mqtt_client, STRING_HANDLE trace_log)
{
if (mqtt_client != NULL && mqtt_client->logTrace && trace_log != NULL)
{
char tmBuffer[TIME_MAX_BUFFER];
getLogTime(tmBuffer, TIME_MAX_BUFFER);
LOG(AZ_LOG_TRACE, LOG_LINE, "<- %s %s", tmBuffer, STRING_c_str(trace_log) );
}
}
static void logIncomingRawTrace(MQTT_CLIENT* mqtt_client, CONTROL_PACKET_TYPE packet, uint8_t flags, const uint8_t* data, size_t length)
{
#ifdef NO_LOGGING
UNUSED(flags);
#endif
if (mqtt_client != NULL && mqtt_client->rawBytesTrace)
{
if (data != NULL && length > 0)
{
char tmBuffer[TIME_MAX_BUFFER];
getLogTime(tmBuffer, TIME_MAX_BUFFER);
LOG(AZ_LOG_TRACE, 0, "<- %s %s: 0x%02x 0x%02x ", tmBuffer, retrievePacketType((CONTROL_PACKET_TYPE)packet), (unsigned char)(packet | flags), length);
size_t index = 0;
for (index = 0; index < length; index++)
{
LOG(AZ_LOG_TRACE, 0, "0x%02x ", data[index]);
}
LOG(AZ_LOG_TRACE, LOG_LINE, "");
}
else if (packet == PINGRESP_TYPE)
{
char tmBuffer[TIME_MAX_BUFFER];
getLogTime(tmBuffer, TIME_MAX_BUFFER);
LOG(AZ_LOG_TRACE, LOG_LINE, "<- %s %s: 0x%02x 0x%02x ", tmBuffer, retrievePacketType((CONTROL_PACKET_TYPE)packet), (unsigned char)(packet | flags), length);
}
}
}
static int sendPacketItem(MQTT_CLIENT* mqtt_client, const unsigned char* data, size_t length)
{
int result;
if (tickcounter_get_current_ms(mqtt_client->packetTickCntr, &mqtt_client->packetSendTimeMs) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Failure getting current ms tickcounter");
result = __FAILURE__;
}
else
{
result = xio_send(mqtt_client->xioHandle, (const void*)data, length, sendComplete, mqtt_client);
if (result != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "%d: Failure sending control packet data", result);
result = __FAILURE__;
}
else
{
logOutgoingRawTrace(mqtt_client, (const uint8_t*)data, length);
}
}
return result;
}
static void onOpenComplete(void* context, IO_OPEN_RESULT open_result)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)context;
if (mqtt_client != NULL)
{
if (open_result == IO_OPEN_OK && !mqtt_client->socketConnected)
{
mqtt_client->packetState = CONNECT_TYPE;
mqtt_client->socketConnected = true;
STRING_HANDLE trace_log = construct_trace_log_handle(mqtt_client);
// Send the Connect packet
BUFFER_HANDLE connPacket = mqtt_codec_connect(&mqtt_client->mqttOptions, trace_log);
if (connPacket == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_codec_connect failed");
}
else
{
size_t size = BUFFER_length(connPacket);
/*Codes_SRS_MQTT_CLIENT_07_009: [On success mqtt_client_connect shall send the MQTT CONNECT to the endpoint.]*/
if (sendPacketItem(mqtt_client, BUFFER_u_char(connPacket), size) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_codec_connect failed");
}
else
{
log_outgoing_trace(mqtt_client, trace_log);
}
BUFFER_delete(connPacket);
}
if (trace_log != NULL)
{
STRING_delete(trace_log);
}
}
else
{
if (mqtt_client->socketConnected == false && mqtt_client->fnOnErrorCallBack)
{
mqtt_client->fnOnErrorCallBack(mqtt_client, MQTT_CLIENT_CONNECTION_ERROR, mqtt_client->errorCBCtx);
}
close_connection(mqtt_client);
}
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_client is NULL");
}
}
static void onBytesReceived(void* context, const unsigned char* buffer, size_t size)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)context;
if (mqtt_client != NULL)
{
if (mqtt_codec_bytesReceived(mqtt_client->codec_handle, buffer, size) != 0)
{
set_error_callback(mqtt_client, MQTT_CLIENT_PARSE_ERROR);
}
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_client is NULL");
}
}
static void onIoError(void* context)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)context;
if (mqtt_client != NULL && mqtt_client->fnOperationCallback)
{
/*Codes_SRS_MQTT_CLIENT_07_032: [If the actionResult parameter is of type MQTT_CLIENT_ON_DISCONNECT the the msgInfo value shall be NULL.]*/
/* Codes_SRS_MQTT_CLIENT_07_036: [ If an error is encountered by the ioHandle the mqtt_client shall call xio_close. ] */
set_error_callback(mqtt_client, MQTT_CLIENT_CONNECTION_ERROR);
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Error invalid parameter: mqtt_client: %p", mqtt_client);
}
}
static void clear_mqtt_options(MQTT_CLIENT* mqtt_client)
{
if (mqtt_client->mqttOptions.clientId != NULL)
{
free(mqtt_client->mqttOptions.clientId);
mqtt_client->mqttOptions.clientId = NULL;
}
if (mqtt_client->mqttOptions.willTopic != NULL)
{
free(mqtt_client->mqttOptions.willTopic);
mqtt_client->mqttOptions.willTopic = NULL;
}
if (mqtt_client->mqttOptions.willMessage != NULL)
{
free(mqtt_client->mqttOptions.willMessage);
mqtt_client->mqttOptions.willMessage = NULL;
}
if (mqtt_client->mqttOptions.username != NULL)
{
free(mqtt_client->mqttOptions.username);
mqtt_client->mqttOptions.username = NULL;
}
if (mqtt_client->mqttOptions.password != NULL)
{
free(mqtt_client->mqttOptions.password);
mqtt_client->mqttOptions.password = NULL;
}
}
static int cloneMqttOptions(MQTT_CLIENT* mqtt_client, const MQTT_CLIENT_OPTIONS* mqttOptions)
{
int result = 0;
if (mqttOptions->clientId != NULL)
{
char* clientId;
if (mallocAndStrcpy_s(&clientId, mqttOptions->clientId) != 0)
{
result = __FAILURE__;
LOG(AZ_LOG_ERROR, LOG_LINE, "mallocAndStrcpy_s clientId");
}
else
{
if (mqtt_client->mqttOptions.clientId != NULL)
{
free(mqtt_client->mqttOptions.clientId);
}
mqtt_client->mqttOptions.clientId = clientId;
}
}
if (result == 0 && mqttOptions->willTopic != NULL)
{
char* willTopic;
if (mallocAndStrcpy_s(&willTopic, mqttOptions->willTopic) != 0)
{
result = __FAILURE__;
LOG(AZ_LOG_ERROR, LOG_LINE, "mallocAndStrcpy_s willTopic");
}
else
{
if (mqtt_client->mqttOptions.willTopic != NULL)
{
free(mqtt_client->mqttOptions.willTopic);
}
mqtt_client->mqttOptions.willTopic = willTopic;
}
}
if (result == 0 && mqttOptions->willMessage != NULL)
{
char* willMessage;
if (mallocAndStrcpy_s(&willMessage, mqttOptions->willMessage) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "mallocAndStrcpy_s willMessage");
result = __FAILURE__;
}
else
{
if (mqtt_client->mqttOptions.willMessage != NULL)
{
free(mqtt_client->mqttOptions.willMessage);
}
mqtt_client->mqttOptions.willMessage = willMessage;
}
}
if (result == 0 && mqttOptions->username != NULL)
{
char* username;
if (mallocAndStrcpy_s(&username, mqttOptions->username) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "mallocAndStrcpy_s username");
result = __FAILURE__;
}
else
{
if (mqtt_client->mqttOptions.username != NULL)
{
free(mqtt_client->mqttOptions.username);
}
mqtt_client->mqttOptions.username = username;
}
}
if (result == 0 && mqttOptions->password != NULL)
{
char* password;
if (mallocAndStrcpy_s(&password, mqttOptions->password) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "mallocAndStrcpy_s password");
result = __FAILURE__;
}
else
{
if (mqtt_client->mqttOptions.password != NULL)
{
free(mqtt_client->mqttOptions.password);
}
mqtt_client->mqttOptions.password = password;
}
}
if (result == 0)
{
mqtt_client->mqttOptions.keepAliveInterval = mqttOptions->keepAliveInterval;
mqtt_client->mqttOptions.messageRetain = mqttOptions->messageRetain;
mqtt_client->mqttOptions.useCleanSession = mqttOptions->useCleanSession;
mqtt_client->mqttOptions.qualityOfServiceValue = mqttOptions->qualityOfServiceValue;
}
else
{
clear_mqtt_options(mqtt_client);
}
return result;
}
static void recvCompleteCallback(void* context, CONTROL_PACKET_TYPE packet, int flags, BUFFER_HANDLE headerData)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)context;
if ((mqtt_client != NULL && headerData != NULL) || packet == PINGRESP_TYPE)
{
size_t len = 0;
uint8_t* iterator = NULL;
if (headerData != NULL)
{
len = BUFFER_length(headerData);
iterator = BUFFER_u_char(headerData);
}
logIncomingRawTrace(mqtt_client, packet, (uint8_t)flags, iterator, len);
if ((iterator != NULL && len > 0) || packet == PINGRESP_TYPE)
{
switch (packet)
{
case CONNACK_TYPE:
{
if (mqtt_client->fnOperationCallback != NULL)
{
STRING_HANDLE trace_log = NULL;
/*Codes_SRS_MQTT_CLIENT_07_028: [If the actionResult parameter is of type CONNECT_ACK then the msgInfo value shall be a CONNECT_ACK structure.]*/
CONNECT_ACK connack = { 0 };
connack.isSessionPresent = (byteutil_readByte(&iterator) == 0x1) ? true : false;
uint8_t rc = byteutil_readByte(&iterator);
connack.returnCode =
(rc < ((uint8_t)CONN_REFUSED_UNKNOWN)) ?
(CONNECT_RETURN_CODE)rc : CONN_REFUSED_UNKNOWN;
if (mqtt_client->logTrace)
{
trace_log = STRING_construct_sprintf("CONNACK | SESSION_PRESENT: %s | RETURN_CODE: 0x%x", connack.isSessionPresent ? TRUE_CONST : FALSE_CONST, connack.returnCode);
log_incoming_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
mqtt_client->fnOperationCallback(mqtt_client, MQTT_CLIENT_ON_CONNACK, (void*)&connack, mqtt_client->ctx);
if (connack.returnCode == CONNECTION_ACCEPTED)
{
mqtt_client->clientConnected = true;
}
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "fnOperationCallback NULL");
}
break;
}
case PUBLISH_TYPE:
{
if (mqtt_client->fnMessageRecv != NULL)
{
STRING_HANDLE trace_log = NULL;
bool isDuplicateMsg = (flags & DUPLICATE_FLAG_MASK) ? true : false;
bool isRetainMsg = (flags & RETAIN_FLAG_MASK) ? true : false;
QOS_VALUE qosValue = (flags == 0) ? DELIVER_AT_MOST_ONCE : (flags & QOS_LEAST_ONCE_FLAG_MASK) ? DELIVER_AT_LEAST_ONCE : DELIVER_EXACTLY_ONCE;
if (mqtt_client->logTrace)
{
trace_log = STRING_construct_sprintf("PUBLISH | IS_DUP: %s | RETAIN: %d | QOS: %s", isDuplicateMsg ? TRUE_CONST : FALSE_CONST,
isRetainMsg ? 1 : 0, ENUM_TO_STRING(QOS_VALUE, qosValue) );
}
uint8_t* initialPos = iterator;
size_t length = len - (iterator - initialPos);
char* topicName = byteutil_readUTF(&iterator, &length);
if (topicName == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Publish MSG: failure reading topic name");
set_error_callback(mqtt_client, MQTT_CLIENT_PARSE_ERROR);
if (trace_log != NULL)
{
STRING_delete(trace_log);
}
}
else
{
if (mqtt_client->logTrace)
{
STRING_sprintf(trace_log, " | TOPIC_NAME: %s", topicName);
}
uint16_t packetId = 0;
length = len - (iterator - initialPos);
if (qosValue != DELIVER_AT_MOST_ONCE)
{
packetId = byteutil_read_uint16(&iterator, length);
if (mqtt_client->logTrace)
{
STRING_sprintf(trace_log, " | PACKET_ID: %"PRIu16, packetId);
}
}
length = len - (iterator - initialPos);
MQTT_MESSAGE_HANDLE msgHandle = mqttmessage_create(packetId, topicName, qosValue, iterator, length);
if (msgHandle == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "failure in mqttmessage_create");
set_error_callback(mqtt_client, MQTT_CLIENT_MEMORY_ERROR);
if (trace_log != NULL) {
STRING_delete(trace_log);
}
}
else
{
if (mqttmessage_setIsDuplicateMsg(msgHandle, isDuplicateMsg) != 0 ||
mqttmessage_setIsRetained(msgHandle, isRetainMsg) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "failure setting mqtt message property");
set_error_callback(mqtt_client, MQTT_CLIENT_MEMORY_ERROR);
if (trace_log != NULL) {
STRING_delete(trace_log);
}
}
else
{
if (mqtt_client->logTrace)
{
STRING_sprintf(trace_log, " | PAYLOAD_LEN: %zu", length);
log_incoming_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
mqtt_client->fnMessageRecv(msgHandle, mqtt_client->ctx);
BUFFER_HANDLE pubRel = NULL;
if (qosValue == DELIVER_EXACTLY_ONCE)
{
pubRel = mqtt_codec_publishReceived(packetId);
if (pubRel == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Failed to allocate publish receive message.");
set_error_callback(mqtt_client, MQTT_CLIENT_MEMORY_ERROR);
}
}
else if (qosValue == DELIVER_AT_LEAST_ONCE)
{
pubRel = mqtt_codec_publishAck(packetId);
if (pubRel == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Failed to allocate publish ack message.");
set_error_callback(mqtt_client, MQTT_CLIENT_MEMORY_ERROR);
}
}
if (pubRel != NULL)
{
size_t size = BUFFER_length(pubRel);
(void)sendPacketItem(mqtt_client, BUFFER_u_char(pubRel), size);
BUFFER_delete(pubRel);
}
}
mqttmessage_destroy(msgHandle);
}
free(topicName);
}
}
break;
}
case PUBACK_TYPE:
case PUBREC_TYPE:
case PUBREL_TYPE:
case PUBCOMP_TYPE:
{
if (mqtt_client->fnOperationCallback)
{
STRING_HANDLE trace_log = NULL;
/*Codes_SRS_MQTT_CLIENT_07_029: [If the actionResult parameter are of types PUBACK_TYPE, PUBREC_TYPE, PUBREL_TYPE or PUBCOMP_TYPE then the msgInfo value shall be a PUBLISH_ACK structure.]*/
MQTT_CLIENT_EVENT_RESULT action = (packet == PUBACK_TYPE) ? MQTT_CLIENT_ON_PUBLISH_ACK :
(packet == PUBREC_TYPE) ? MQTT_CLIENT_ON_PUBLISH_RECV :
(packet == PUBREL_TYPE) ? MQTT_CLIENT_ON_PUBLISH_REL : MQTT_CLIENT_ON_PUBLISH_COMP;
PUBLISH_ACK publish_ack = { 0 };
publish_ack.packetId = byteutil_read_uint16(&iterator, len);
if (mqtt_client->logTrace)
{
trace_log = STRING_construct_sprintf("%s | PACKET_ID: %"PRIu16, packet == PUBACK_TYPE ? "PUBACK" : (packet == PUBREC_TYPE) ? "PUBREC" : (packet == PUBREL_TYPE) ? "PUBREL" : "PUBCOMP",
publish_ack.packetId);
log_incoming_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
BUFFER_HANDLE pubRel = NULL;
mqtt_client->fnOperationCallback(mqtt_client, action, (void*)&publish_ack, mqtt_client->ctx);
if (packet == PUBREC_TYPE)
{
pubRel = mqtt_codec_publishRelease(publish_ack.packetId);
if (pubRel == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Failed to allocate publish release message.");
set_error_callback(mqtt_client, MQTT_CLIENT_MEMORY_ERROR);
}
}
else if (packet == PUBREL_TYPE)
{
pubRel = mqtt_codec_publishComplete(publish_ack.packetId);
if (pubRel == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Failed to allocate publish complete message.");
set_error_callback(mqtt_client, MQTT_CLIENT_MEMORY_ERROR);
}
}
if (pubRel != NULL)
{
size_t size = BUFFER_length(pubRel);
(void)sendPacketItem(mqtt_client, BUFFER_u_char(pubRel), size);
BUFFER_delete(pubRel);
}
}
break;
}
case SUBACK_TYPE:
{
if (mqtt_client->fnOperationCallback)
{
STRING_HANDLE trace_log = NULL;
/*Codes_SRS_MQTT_CLIENT_07_030: [If the actionResult parameter is of type SUBACK_TYPE then the msgInfo value shall be a SUBSCRIBE_ACK structure.]*/
SUBSCRIBE_ACK suback = { 0 };
size_t remainLen = len;
suback.packetId = byteutil_read_uint16(&iterator, len);
remainLen -= 2;
if (mqtt_client->logTrace)
{
trace_log = STRING_construct_sprintf("SUBACK | PACKET_ID: %"PRIu16, suback.packetId);
}
// Allocate the remaining len
suback.qosReturn = (QOS_VALUE*)malloc(sizeof(QOS_VALUE)*remainLen);
if (suback.qosReturn != NULL)
{
while (remainLen > 0)
{
uint8_t qosRet = byteutil_readByte(&iterator);
suback.qosReturn[suback.qosCount++] =
(qosRet <= ((uint8_t)DELIVER_EXACTLY_ONCE)) ?
(QOS_VALUE)qosRet : DELIVER_FAILURE;
remainLen--;
if (mqtt_client->logTrace)
{
STRING_sprintf(trace_log, " | RETURN_CODE: %"PRIu16, suback.qosReturn[suback.qosCount-1]);
}
}
if (mqtt_client->logTrace)
{
log_incoming_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
mqtt_client->fnOperationCallback(mqtt_client, MQTT_CLIENT_ON_SUBSCRIBE_ACK, (void*)&suback, mqtt_client->ctx);
free(suback.qosReturn);
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "allocation of quality of service value failed.");
set_error_callback(mqtt_client, MQTT_CLIENT_MEMORY_ERROR);
}
}
break;
}
case UNSUBACK_TYPE:
{
if (mqtt_client->fnOperationCallback)
{
STRING_HANDLE trace_log = NULL;
/*Codes_SRS_MQTT_CLIENT_07_031: [If the actionResult parameter is of type UNSUBACK_TYPE then the msgInfo value shall be a UNSUBSCRIBE_ACK structure.]*/
UNSUBSCRIBE_ACK unsuback = { 0 };
unsuback.packetId = byteutil_read_uint16(&iterator, len);
if (mqtt_client->logTrace)
{
trace_log = STRING_construct_sprintf("UNSUBACK | PACKET_ID: %"PRIu16, unsuback.packetId);
log_incoming_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
mqtt_client->fnOperationCallback(mqtt_client, MQTT_CLIENT_ON_UNSUBSCRIBE_ACK, (void*)&unsuback, mqtt_client->ctx);
}
break;
}
case PINGRESP_TYPE:
if (mqtt_client != NULL)
{
mqtt_client->timeSincePing = 0;
if (mqtt_client->logTrace)
{
STRING_HANDLE trace_log = STRING_construct_sprintf("PINGRESP");
log_incoming_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
// Forward ping response to operation callback
if (mqtt_client->fnOperationCallback)
{
mqtt_client->fnOperationCallback(mqtt_client, MQTT_CLIENT_ON_PING_RESPONSE, NULL, mqtt_client->ctx);
}
}
else
{
LOG(AZ_LOG_ERROR, LOG_LINE, "MQTT client value NULL");
}
break;
default:
break;
}
}
}
}
MQTT_CLIENT_HANDLE mqtt_client_init(ON_MQTT_MESSAGE_RECV_CALLBACK msgRecv, ON_MQTT_OPERATION_CALLBACK opCallback, void* opCallbackCtx, ON_MQTT_ERROR_CALLBACK onErrorCallBack, void* errorCBCtx)
{
MQTT_CLIENT* result;
/*Codes_SRS_MQTT_CLIENT_07_001: [If the parameters ON_MQTT_MESSAGE_RECV_CALLBACK is NULL then mqttclient_init shall return NULL.]*/
if (msgRecv == NULL)
{
result = NULL;
}
else
{
result = malloc(sizeof(MQTT_CLIENT));
if (result == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_002: [If any failure is encountered then mqttclient_init shall return NULL.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "mqtt_client_init failure: Allocation Failure");
}
else
{
memset(result, 0, sizeof(MQTT_CLIENT));
/*Codes_SRS_MQTT_CLIENT_07_003: [mqttclient_init shall allocate MQTTCLIENT_DATA_INSTANCE and return the MQTTCLIENT_HANDLE on success.]*/
result->packetState = UNKNOWN_TYPE;
result->fnOperationCallback = opCallback;
result->ctx = opCallbackCtx;
result->fnMessageRecv = msgRecv;
result->fnOnErrorCallBack = onErrorCallBack;
result->errorCBCtx = errorCBCtx;
result->qosValue = DELIVER_AT_MOST_ONCE;
result->packetTickCntr = tickcounter_create();
result->maxPingRespTime = DEFAULT_MAX_PING_RESPONSE_TIME;
if (result->packetTickCntr == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_002: [If any failure is encountered then mqttclient_init shall return NULL.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "mqtt_client_init failure: tickcounter_create failure");
free(result);
result = NULL;
}
else
{
result->codec_handle = mqtt_codec_create(recvCompleteCallback, result);
if (result->codec_handle == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_002: [If any failure is encountered then mqttclient_init shall return NULL.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "mqtt_client_init failure: mqtt_codec_create failure");
tickcounter_destroy(result->packetTickCntr);
free(result);
result = NULL;
}
}
}
}
return result;
}
void mqtt_client_deinit(MQTT_CLIENT_HANDLE handle)
{
/*Codes_SRS_MQTT_CLIENT_07_004: [If the parameter handle is NULL then function mqtt_client_deinit shall do nothing.]*/
if (handle != NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_005: [mqtt_client_deinit shall deallocate all memory allocated in this unit.]*/
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
tickcounter_destroy(mqtt_client->packetTickCntr);
mqtt_codec_destroy(mqtt_client->codec_handle);
clear_mqtt_options(mqtt_client);
free(mqtt_client);
}
}
int mqtt_client_connect(MQTT_CLIENT_HANDLE handle, XIO_HANDLE xioHandle, MQTT_CLIENT_OPTIONS* mqttOptions)
{
int result;
/*SRS_MQTT_CLIENT_07_006: [If any of the parameters handle, ioHandle, or mqttOptions are NULL then mqtt_client_connect shall return a non-zero value.]*/
if (handle == NULL || mqttOptions == NULL)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "mqtt_client_connect: NULL argument (handle = %p, mqttOptions = %p)", handle, mqttOptions);
result = __FAILURE__;
}
else
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
if (xioHandle == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_007: [If any failure is encountered then mqtt_client_connect shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqttcodec_connect failed");
result = __FAILURE__;
}
else
{
mqtt_client->xioHandle = xioHandle;
mqtt_client->packetState = UNKNOWN_TYPE;
mqtt_client->qosValue = mqttOptions->qualityOfServiceValue;
mqtt_client->keepAliveInterval = mqttOptions->keepAliveInterval;
mqtt_client->maxPingRespTime = (DEFAULT_MAX_PING_RESPONSE_TIME < mqttOptions->keepAliveInterval/2) ? DEFAULT_MAX_PING_RESPONSE_TIME : mqttOptions->keepAliveInterval/2;
if (cloneMqttOptions(mqtt_client, mqttOptions) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: Clone Mqtt Options failed");
result = __FAILURE__;
}
/*Codes_SRS_MQTT_CLIENT_07_008: [mqtt_client_connect shall open the XIO_HANDLE by calling into the xio_open interface.]*/
else if (xio_open(xioHandle, onOpenComplete, mqtt_client, onBytesReceived, mqtt_client, onIoError, mqtt_client) != 0)
{
/*Codes_SRS_MQTT_CLIENT_07_007: [If any failure is encountered then mqtt_client_connect shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: io_open failed");
result = __FAILURE__;
// Remove cloned options
clear_mqtt_options(mqtt_client);
}
else
{
result = 0;
}
}
}
return result;
}
int mqtt_client_publish(MQTT_CLIENT_HANDLE handle, MQTT_MESSAGE_HANDLE msgHandle)
{
int result;
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
if (mqtt_client == NULL || msgHandle == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_019: [If one of the parameters handle or msgHandle is NULL then mqtt_client_publish shall return a non-zero value.]*/
LogError("Invalid parameter specified mqtt_client: %p, msgHandle: %p", mqtt_client, msgHandle);
result = __FAILURE__;
}
else
{
/*Codes_SRS_MQTT_CLIENT_07_021: [mqtt_client_publish shall get the message information from the MQTT_MESSAGE_HANDLE.]*/
const APP_PAYLOAD* payload = mqttmessage_getApplicationMsg(msgHandle);
if (payload == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_020: [If any failure is encountered then mqtt_client_unsubscribe shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqttmessage_getApplicationMsg failed");
result = __FAILURE__;
}
else
{
STRING_HANDLE trace_log = construct_trace_log_handle(mqtt_client);
QOS_VALUE qos = mqttmessage_getQosType(msgHandle);
bool isDuplicate = mqttmessage_getIsDuplicateMsg(msgHandle);
bool isRetained = mqttmessage_getIsRetained(msgHandle);
uint16_t packetId = mqttmessage_getPacketId(msgHandle);
const char* topicName = mqttmessage_getTopicName(msgHandle);
BUFFER_HANDLE publishPacket = mqtt_codec_publish(qos, isDuplicate, isRetained, packetId, topicName, payload->message, payload->length, trace_log);
if (publishPacket == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_020: [If any failure is encountered then mqtt_client_unsubscribe shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_codec_publish failed");
result = __FAILURE__;
}
else
{
mqtt_client->packetState = PUBLISH_TYPE;
/*Codes_SRS_MQTT_CLIENT_07_022: [On success mqtt_client_publish shall send the MQTT SUBCRIBE packet to the endpoint.]*/
size_t size = BUFFER_length(publishPacket);
if (sendPacketItem(mqtt_client, BUFFER_u_char(publishPacket), size) != 0)
{
/*Codes_SRS_MQTT_CLIENT_07_020: [If any failure is encountered then mqtt_client_unsubscribe shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_client_publish send failed");
result = __FAILURE__;
}
else
{
log_outgoing_trace(mqtt_client, trace_log);
result = 0;
}
BUFFER_delete(publishPacket);
}
if (trace_log != NULL)
{
STRING_delete(trace_log);
}
}
}
return result;
}
int mqtt_client_subscribe(MQTT_CLIENT_HANDLE handle, uint16_t packetId, SUBSCRIBE_PAYLOAD* subscribeList, size_t count)
{
int result;
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
if (mqtt_client == NULL || subscribeList == NULL || count == 0 || packetId == 0)
{
/*Codes_SRS_MQTT_CLIENT_07_013: [If any of the parameters handle, subscribeList is NULL or count is 0 then mqtt_client_subscribe shall return a non-zero value.]*/
LogError("Invalid parameter specified mqtt_client: %p, subscribeList: %p, count: %d, packetId: %d", mqtt_client, subscribeList, count, packetId);
result = __FAILURE__;
}
else
{
STRING_HANDLE trace_log = construct_trace_log_handle(mqtt_client);
BUFFER_HANDLE subPacket = mqtt_codec_subscribe(packetId, subscribeList, count, trace_log);
if (subPacket == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_014: [If any failure is encountered then mqtt_client_subscribe shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_codec_subscribe failed");
result = __FAILURE__;
}
else
{
mqtt_client->packetState = SUBSCRIBE_TYPE;
size_t size = BUFFER_length(subPacket);
/*Codes_SRS_MQTT_CLIENT_07_015: [On success mqtt_client_subscribe shall send the MQTT SUBCRIBE packet to the endpoint.]*/
if (sendPacketItem(mqtt_client, BUFFER_u_char(subPacket), size) != 0)
{
/*Codes_SRS_MQTT_CLIENT_07_014: [If any failure is encountered then mqtt_client_subscribe shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_client_subscribe send failed");
result = __FAILURE__;
}
else
{
log_outgoing_trace(mqtt_client, trace_log);
result = 0;
}
BUFFER_delete(subPacket);
}
if (trace_log != NULL)
{
STRING_delete(trace_log);
}
}
return result;
}
int mqtt_client_unsubscribe(MQTT_CLIENT_HANDLE handle, uint16_t packetId, const char** unsubscribeList, size_t count)
{
int result;
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
if (mqtt_client == NULL || unsubscribeList == NULL || count == 0 || packetId == 0)
{
/*Codes_SRS_MQTT_CLIENT_07_016: [If any of the parameters handle, unsubscribeList is NULL or count is 0 then mqtt_client_unsubscribe shall return a non-zero value.]*/
LogError("Invalid parameter specified mqtt_client: %p, unsubscribeList: %p, count: %d, packetId: %d", mqtt_client, unsubscribeList, count, packetId);
result = __FAILURE__;
}
else
{
STRING_HANDLE trace_log = construct_trace_log_handle(mqtt_client);
BUFFER_HANDLE unsubPacket = mqtt_codec_unsubscribe(packetId, unsubscribeList, count, trace_log);
if (unsubPacket == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_017: [If any failure is encountered then mqtt_client_unsubscribe shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_codec_unsubscribe failed");
result = __FAILURE__;
}
else
{
mqtt_client->packetState = UNSUBSCRIBE_TYPE;
size_t size = BUFFER_length(unsubPacket);
/*Codes_SRS_MQTT_CLIENT_07_018: [On success mqtt_client_unsubscribe shall send the MQTT SUBCRIBE packet to the endpoint.]*/
if (sendPacketItem(mqtt_client, BUFFER_u_char(unsubPacket), size) != 0)
{
/*Codes_SRS_MQTT_CLIENT_07_017: [If any failure is encountered then mqtt_client_unsubscribe shall return a non-zero value.].]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_client_unsubscribe send failed");
result = __FAILURE__;
}
else
{
log_outgoing_trace(mqtt_client, trace_log);
result = 0;
}
BUFFER_delete(unsubPacket);
}
if (trace_log != NULL)
{
STRING_delete(trace_log);
}
}
return result;
}
int mqtt_client_disconnect(MQTT_CLIENT_HANDLE handle, ON_MQTT_DISCONNECTED_CALLBACK callback, void* ctx)
{
int result;
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
if (mqtt_client == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_010: [If the parameters handle is NULL then mqtt_client_disconnect shall return a non-zero value.]*/
result = __FAILURE__;
}
else
{
if (mqtt_client->clientConnected)
{
BUFFER_HANDLE disconnectPacket = mqtt_codec_disconnect();
if (disconnectPacket == NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_011: [If any failure is encountered then mqtt_client_disconnect shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_client_disconnect failed");
mqtt_client->packetState = PACKET_TYPE_ERROR;
result = __FAILURE__;
}
else
{
/* Codes_SRS_MQTT_CLIENT_07_037: [ if callback is not NULL callback shall be called once the mqtt connection has been disconnected ] */
mqtt_client->disconnect_cb = callback;
mqtt_client->disconnect_ctx = ctx;
mqtt_client->packetState = DISCONNECT_TYPE;
size_t size = BUFFER_length(disconnectPacket);
/*Codes_SRS_MQTT_CLIENT_07_012: [On success mqtt_client_disconnect shall send the MQTT DISCONNECT packet to the endpoint.]*/
if (sendPacketItem(mqtt_client, BUFFER_u_char(disconnectPacket), size) != 0)
{
/*Codes_SRS_MQTT_CLIENT_07_011: [If any failure is encountered then mqtt_client_disconnect shall return a non-zero value.]*/
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: mqtt_client_disconnect send failed");
result = __FAILURE__;
}
else
{
if (mqtt_client->logTrace)
{
STRING_HANDLE trace_log = STRING_construct("DISCONNECT");
log_outgoing_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
result = 0;
}
BUFFER_delete(disconnectPacket);
}
clear_mqtt_options(mqtt_client);
mqtt_client->xioHandle = NULL;
}
else
{
// If the client is not connected then just close the underlying socket
mqtt_client->disconnect_cb = callback;
mqtt_client->disconnect_ctx = ctx;
close_connection(mqtt_client);
clear_mqtt_options(mqtt_client);
result = 0;
}
}
return result;
}
void mqtt_client_dowork(MQTT_CLIENT_HANDLE handle)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
/*Codes_SRS_MQTT_CLIENT_18_001: [If the client is disconnected, mqtt_client_dowork shall do nothing.]*/
/*Codes_SRS_MQTT_CLIENT_07_023: [If the parameter handle is NULL then mqtt_client_dowork shall do nothing.]*/
if (mqtt_client != NULL && mqtt_client->xioHandle != NULL)
{
/*Codes_SRS_MQTT_CLIENT_07_024: [mqtt_client_dowork shall call the xio_dowork function to complete operations.]*/
xio_dowork(mqtt_client->xioHandle);
/*Codes_SRS_MQTT_CLIENT_07_025: [mqtt_client_dowork shall retrieve the the last packet send value and ...]*/
if (mqtt_client->socketConnected && mqtt_client->clientConnected && mqtt_client->keepAliveInterval > 0)
{
tickcounter_ms_t current_ms;
if (tickcounter_get_current_ms(mqtt_client->packetTickCntr, ¤t_ms) != 0)
{
LOG(AZ_LOG_ERROR, LOG_LINE, "Error: tickcounter_get_current_ms failed");
}
else
{
/* Codes_SRS_MQTT_CLIENT_07_035: [If the timeSincePing has expired past the maxPingRespTime then mqtt_client_dowork shall call the Error Callback function with the message MQTT_CLIENT_NO_PING_RESPONSE] */
if (mqtt_client->timeSincePing > 0 && ((current_ms - mqtt_client->timeSincePing)/1000) > mqtt_client->maxPingRespTime)
{
// We haven't gotten a ping response in the alloted time
set_error_callback(mqtt_client, MQTT_CLIENT_NO_PING_RESPONSE);
mqtt_client->timeSincePing = 0;
mqtt_client->packetSendTimeMs = 0;
mqtt_client->packetState = UNKNOWN_TYPE;
}
else if (((current_ms - mqtt_client->packetSendTimeMs) / 1000) >= mqtt_client->keepAliveInterval)
{
/*Codes_SRS_MQTT_CLIENT_07_026: [if keepAliveInternal is > 0 and the send time is greater than the MQTT KeepAliveInterval then it shall construct an MQTT PINGREQ packet.]*/
BUFFER_HANDLE pingPacket = mqtt_codec_ping();
if (pingPacket != NULL)
{
size_t size = BUFFER_length(pingPacket);
(void)sendPacketItem(mqtt_client, BUFFER_u_char(pingPacket), size);
BUFFER_delete(pingPacket);
(void)tickcounter_get_current_ms(mqtt_client->packetTickCntr, &mqtt_client->timeSincePing);
if (mqtt_client->logTrace)
{
STRING_HANDLE trace_log = STRING_construct("PINGREQ");
log_outgoing_trace(mqtt_client, trace_log);
STRING_delete(trace_log);
}
}
}
}
}
}
}
void mqtt_client_set_trace(MQTT_CLIENT_HANDLE handle, bool traceOn, bool rawBytesOn)
{
MQTT_CLIENT* mqtt_client = (MQTT_CLIENT*)handle;
if (mqtt_client != NULL)
{
mqtt_client->logTrace = traceOn;
mqtt_client->rawBytesTrace = rawBytesOn;
}
}
