dtu_lan_gateway/app/System/source/sys_mqtt.c

#include "string.h"
#include "stm32f2xx.h"
#include "ucos_ii.h"
#include "hd_eth.h"
#include "lwip/arch.h"
#include "sys_mqtt.h"
#include "transport.h"
#include "MQTTFormat.h"
#include "cJSON.h"
#include "led.h"
#include "MQTTClient.h"
#include "malloc.h"
#include "mmodbus.h"
#include "myFile.h"
#include "gateway_message.h"
#include "task.h"

/********************************************************
* @brief  连接到服务器
* @param  sock: sock编号
*********************************************************/
int mqtt_userConnect(void)
{
	GATEWAY_PARAMS* get;
	get = get_gateway_config_params();
	char* MQTT_SERVER_ADDR = get->host;
	int MQTT_SERVER_PORT = get->port;
	int sock = -1;
	
	//连接到tcp服务器
	sock = transport_open(MQTT_SERVER_ADDR, MQTT_SERVER_PORT);
	if(sock < 0) 
	{
		MQTT_PRINTF("connect tcp server error \r\n");
		return -1;
	}
	MQTT_PRINTF("connect tcp server success \r\n");
	//连接到mqtt服务器
	if(mqtt_connectToMqttServer(sock) <= 0) 
	{
		MQTT_PRINTF("connect mqtt server error \r\n");
		return -1;
	}
  MQTT_PRINTF("connect mqtt server success \r\n");
	
	return sock;
}

/************************************************************
* @brief  订阅主题
* @param  sock: sock编号
* @retval 1: 订阅成功
*************************************************************/
int mqtt_userSubscribeTopic(int sock)
{
	GATEWAY_PARAMS* get;
	get = get_gateway_config_params();
	char* TOPICPC = (char*)get->commandTopic;
	return mqtt_subscribeTopic(sock, TOPICPC, 2);
}

/*
*接收mqtt下发消息并存储进一个数据队列
*name MQTT主题相关信息
*/
void *json_message[10];
#define QUEUE_SIZE 10         //队列深度
//消息队列指针
OS_EVENT *JsonQ;
void mqtt_outputMsg(MQTTString *name, uint8_t *msgbuf, int msglen, uint16_t id, int qos)
{
	int lenght=msglen;
	MQTT_PRINTF("receive a msg: id=%d qos=%d topic=%s msg=%s \r\n", id, qos, name->lenstring.data, msgbuf);
	StringInfo message;
	message.p=mymalloc(SRAMEX ,msglen);
	memcpy(message.p,msgbuf,msglen);
	uint8_t err;
	err=OSQPost(JsonQ,(void *)&message);
	switch(err)
	{
		case OS_ERR_NONE: 
			break;
		case OS_ERR_Q_FULL: 
			MQTT_PRINTF("receive a msg queue is full \r\n");
			break;
		default:
			break;
	}
}	

/************************************************************
* @brief  处理来自平台发布的信息
* @param  sock: sock编号
          pbuf: 接收的数据
          buflen: 数据的长度
* @retval 1: 消息正常处理
*        -2: 帧数据包错误
*************************************************************/

int mqtt_recvPublishMessage(int sock, uint8_t *pbuf, int buflen)
{
	uint8_t dup, retained;
	int qos, payloadlen;
	uint16_t packetid;
	MQTTString topicName;
	uint8_t *payload;
	int msg;
	
  if(MQTTDeserialize_publish(&dup, &qos, &retained, &packetid, &topicName, &payload, &payloadlen, pbuf, buflen) == 1)
	{
		mqtt_outputMsg(&topicName, payload, payloadlen, packetid, qos);	
		WRITE_MODBUS_DATA(payload);
	}
  else return -2;
	
	if(qos == 1) 
	{
		mqtt_recvPublishQos1_packid = packetid;
		msg = MBOX_MQTT_QOS1PUBACK;
		OSMboxPost(mqtt_sendMseeageMbox, &msg);
	}
	
	if(qos == 2) 
	{
		mqtt_recvPublishQos2_packid = packetid;
		msg = MBOX_MQTT_QOS2PUBREC;
		OSMboxPost(mqtt_sendMseeageMbox, &msg);
	}
	
	return 1;
}

/************************************************************
* @brief  解析所有平台下发的数据包
* @param  sock: sock编号
          type: 数据帧的类型
          pbuf: 数据
          buflen: 数据的长度
* @retval 1: 消息正常处理
*        -2: 帧数据包错误
*************************************************************/
int mqtt_userReceiveMessage(int sock, int type, uint8_t *pbuf, int len)
{
	int rc;
	
	switch(type)
	{
		case PUBLISH:  rc = mqtt_recvPublishMessage(sock, pbuf, len); break;		           //平台向设备发布消息		
		case PUBACK:   rc = mqtt_publishMessage_qos1_PUBACK(pbuf, len); break;	           //设备向平台发布 QOS1 确认报文	
		case PUBREC:   rc = mqtt_publishMessage_qos2_PUBREC(pbuf, len); break;	           //设备向平台发布 QOS2 确认报文
		case PUBREL:   rc = mqtt_recvPublishMessage_qos2_PUBREL(sock, pbuf, len); break;	 //平台向设备发布 QOS2 消息释放报文
		case PUBCOMP:  rc = mqtt_publishMessage_qos2_PUBCOMP(pbuf, len); break;	           //设备向平台发布 QOS2 消息释放报文的确认报文
		case SUBACK:   rc = mqtt_subscribeTopic_SUBACK(pbuf, len);break;		               //设备向平台订阅报文时的响应报文
		case UNSUBACK: rc = mqtt_unSubscribeTopic_UNSUBACK(pbuf, len); break;		           //设备向平台发取消订阅报文时的响应报文	
		case PINGRESP: rc = mqtt_pingResponse(); break;	                                   //心跳响应报文	
		default: rc = 1; break;
	}
	
	return rc;
}

/************************************************************
* @brief  处理发送邮箱 mqtt_recvMbox 中的消息，根据消息的类型，发送对应的数据包
* @param  sock: sock编号
          boxMsg: 消息内容
* @retval 1: 消息正常处理
*        -1: 网络错误
*        -2: 组建发送数据时发送错误
*************************************************************/
char pubJsonString[jsonMaxSize];
int mqtt_userSendMessage(int sock, int boxMsg)
{
	GATEWAY_PARAMS* get;
	get = get_gateway_config_params();
	char* TOPIC = (char*)get->messageTopic;
	int rc = 1;	
	//用户发送的数据
	if((boxMsg & 0xf0000000) == 0x20000000)
	{
		switch(boxMsg)
		{
			case MBOX_USER_PUBLISHQOS0: rc = mqtt_publishMessage_qos0(sock, TOPIC, (uint8_t *)pubJsonString, strlen(pubJsonString)); break;
			case MBOX_USER_PUBLISHQOS1: rc = mqtt_publishMessage_qos1(sock, TOPIC, (uint8_t *)pubJsonString, strlen(pubJsonString)); break;
			case MBOX_USER_PUBLISHQOS2: rc = mqtt_publishMessage_qos2(sock, TOPIC, (uint8_t *)pubJsonString, strlen(pubJsonString)); break;
		}
	}
	//协议站使用的数据
	else if((boxMsg & 0xf0000000) == 0x10000000)
	{
		switch(boxMsg)
		{
			case MBOX_MQTT_QOS1PUBACK:  rc = mqtt_recvPublishMessage_qos1_PUBACK(sock, mqtt_recvPublishQos1_packid); break;
			case MBOX_MQTT_QOS2PUBREC:  rc = mqtt_recvPublishMessage_qos2_PUBREC(sock, mqtt_recvPublishQos2_packid); break;			
			case MBOX_MQTT_QOS2PUBCOMP: rc = mqtt_recvPublishMessage_qos2_PUBCOMP(sock, mqtt_recvPublishQos2_packid); break;			
		}
	}
	
	return rc;
}


OS_EVENT *mqtt_sendMseeageMbox;   //发送消息邮箱
int mqtt_connectFlag;             //成功连接服务器标志   
static int mysock;                //连接mqtt服务器的sock编号

/************************************************************
* @brief  MQTT主线程
* @param  arg: 未使用
* @retval 
*************************************************************/
//extern uint16_t ModbusValueData_16;
uint16_t ModbusValueData_16;
void mqtt_userManThread(void *arg)
{
	int rc;
	uint8_t err;
	void *mboxMsg;

	MQTT_PRINTF("mqtt mainthread start \r\n");
	
__MQTT_START:	
	
	//1.建立与服务器的连接
	mysock = -1;
	mqtt_connectFlag = 0;
	while(mysock < 0)
	{
		mysock = mqtt_userConnect();
		OSTimeDly(2000);
	}
	OSMboxAccept(mqtt_sendMseeageMbox); //清空mbox的数据
	mqtt_connectFlag = 1;
	
	//2.订阅服务器的主题
	rc = mqtt_userSubscribeTopic(mysock);
	if(rc <= 0)
	{
		MQTT_PRINTF("subscribe error \r\n");
		if(rc == -1) goto __MQTT_START;          //如果网络发生错误，重新建立连接
	}
	else MQTT_PRINTF("subscribe success \r\n");
	
	//3.循环发送数据
	while(1)
	{	
		
		mboxMsg = OSMboxPend(mqtt_sendMseeageMbox, 60000, &err);
		if(OS_ERR_NONE == err)
		{
			//接收到了 网络异常消息
			if((*(unsigned int *)mboxMsg) == MBOX_NETWORK_ERROR) goto __MQTT_START;
			else               
			{
				if(mqtt_userSendMessage(mysock, *(unsigned int *)mboxMsg) == -1)
					goto __MQTT_START;                                    
			}
		}
		else //超时没有发送数据包，发送心跳包
		{
			rc = mqtt_pingReq(mysock);
			if(rc == -1) goto __MQTT_START;
		}
		OSTimeDly(1);
	}
}

/************************************************************
* @brief  MQTT接收线程，处理所有平台下发的数据帧， CONNACK除外
* @param  arg: 未使用
* @retval 
*************************************************************/
void mqtt_userReceiveThread(void *arg)
{
	int len;	
	int packetType;
	int msg;
	char* cJSONstring = malloc(64);
	MQTT_PRINTF("mqtt receivethread start \r\n");
	
	while(1)
	{
		if(mqtt_connectFlag == 1)
		{
			len = transport_receive(mysock);  //阻塞接收数据
			if(len <=0)
			{
				if(len == EWOULDBLOCK)     //接收数据超时，重新接收
				{
					MQTT_PRINTF("receive data timeout \r\n");
					continue;
				}
				else  //接收数据时，网络发生了异常，给主线程发送消息，重新建立连接
				{
					MQTT_PRINTF("sock close \r\n");
					transport_close(mysock);
					
					mqtt_connectFlag = 0;
					msg = MBOX_NETWORK_ERROR;
					OSMboxPost(mqtt_sendMseeageMbox, &msg);
				}
			}
			
			memset(mqtt_recvbuffer, 0, MQTT_RECVBUF_LENTH);
			packetType = MQTTPacket_read(mqtt_recvbuffer, len, transport_getdata);
			mqtt_userReceiveMessage(mysock, packetType, mqtt_recvbuffer, len);
		}
		memset(cJSONstring, 0, 64);
		OSTimeDly(1);
	}
	free(cJSONstring);
}

#define  APP_TASK_MQTTMAIN_PRIO            6
#define  APP_TASK_MQTTMAIN_STK_SIZE        1024
static OS_STK mqttmainTaskStack[APP_TASK_MQTTMAIN_STK_SIZE];

#define  APP_TASK_MQTTRECEIVE_PRIO          7
#define  APP_TASK_MQTTRECEIVE_STK_SIZE      1024
static OS_STK mqttreceiveTaskStack[APP_TASK_MQTTRECEIVE_STK_SIZE];

/************************************************************
* @brief  创建MQTT发送和接收线程，初始化相关数据
* @param  此函数必须在LWIP协议栈初始完成以后再调用
* @retval 
*************************************************************/
void mqtt_threadCreate(void)
{
	mqtt_connectFlag = 0;
	mqtt_sendMseeageMbox = OSMboxCreate(NULL);
	JsonQ = OSQCreate(json_message[0], QUEUE_SIZE);  //创建json队列
	OSTaskCreate(mqtt_userManThread, NULL, &mqttmainTaskStack[APP_TASK_MQTTMAIN_STK_SIZE-1], APP_TASK_MQTTMAIN_PRIO);	
	OSTaskCreate(mqtt_userReceiveThread, NULL, &mqttreceiveTaskStack[APP_TASK_MQTTRECEIVE_STK_SIZE-1], APP_TASK_MQTTRECEIVE_PRIO);		
}