int MQTTDisconnect(MQTTClient *c)
{
int rc = FAILURE;
Timer timer; // we might wait for incomplete incoming publishes to complete
int len = 0;
#if defined(MQTT_TASK)
MutexLock(&c->mutex);
#endif
TimerInit(&timer);
TimerCountdownMS(&timer, c->command_timeout_ms);
len = MQTTSerialize_disconnect(c->buf, c->buf_size);
if (len > 0) {
rc = sendPacket(c, len, &timer); // send the disconnect packet
}
MQTTCloseSession(c);
#if defined(MQTT_TASK)
MutexUnlock(&c->mutex);
#endif
return rc;
}
/**
* @brief 向代理（服务器）发送一个消息
* @param pTopic 消息主题
* @param pMessage 消息内容
* @retval 小于0表示发送失败
*/
int mqtt_publish(char *pTopic,char *pMessage)
{
int32_t len,rc;
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
unsigned char buf[200];
MQTTString topicString = MQTTString_initializer;
int msglen = strlen(pMessage);
int buflen = sizeof(buf);
data.clientID.cstring = "me";
data.keepAliveInterval = 5;
data.cleansession = 1;
len = MQTTSerialize_connect(buf, buflen, &data); /* 1 */
topicString.cstring = pTopic;
len += MQTTSerialize_publish(buf + len, buflen - len, 0, 0, 0, 0, topicString, (unsigned char*)pMessage, msglen); /* 2 */
len += MQTTSerialize_disconnect(buf + len, buflen - len); /* 3 */
transport_open();
rc = transport_sendPacketBuffer(buf,len);
transport_close();
if (rc == len)
printf("Successfully published\n\r");
else
printf("Publish failed\n\r");
return 0;
}
int MQTTDisconnect(Client* c)
{
int rc = FAILURE;
int len = MQTTSerialize_disconnect(c->buf, c->buf_size);
if (len > 0)
rc = sendPacket_ev(c, len); // send the disconnect packet
c->isconnected = 0;
return rc;
}
int mqttClient_disconnect(mqttClient_t* clientData)
{
int rc = LE_OK;
LE_ASSERT(clientData);
if (le_timer_IsRunning(clientData->session.connTimer))
{
rc = le_timer_Stop(clientData->session.connTimer);
if (rc)
{
LE_ERROR("le_timer_Stop() failed(%d)", rc);
goto cleanup;
}
}
if (le_timer_IsRunning(clientData->session.cmdTimer))
{
rc = le_timer_Stop(clientData->session.cmdTimer);
if (rc)
{
LE_ERROR("le_timer_Stop() failed(%d)", rc);
goto cleanup;
}
}
rc = le_timer_Stop(clientData->session.pingTimer);
if (rc)
{
LE_ERROR("le_timer_Stop() failed(%d)", rc);
goto cleanup;
}
int len = MQTTSerialize_disconnect(clientData->session.tx.buf, sizeof(clientData->session.tx.buf));
if (len > 0)
{
rc = mqttClient_write(clientData, len);
if (rc)
{
LE_ERROR("mqttClient_write() failed(%d)", rc);
goto cleanup;
}
}
le_timer_Delete(clientData->session.pingTimer);
le_timer_Delete(clientData->session.cmdTimer);
le_timer_Delete(clientData->session.connTimer);
clientData->session.isConnected = 0;
cleanup:
return rc;
}
int mqtt_disconnect(mqtt_client_t *c)
{
int rc = -1;
int len;
len = MQTTSerialize_disconnect(c->wbuf, c->wbuflen);
if (len > 0)
{
rc = mqtt_write(c->sockfd, c->wbuf, len);
}
return rc;
}
int MQTTDisconnect(Client* c)
{
int rc = FAILURE;
Timer timer; // we might wait for incomplete incoming publishes to complete
int len = MQTTSerialize_disconnect(c->buf, c->buf_size);
InitTimer(&timer);
countdown_ms(&timer, c->command_timeout_ms);
if (len > 0)
rc = sendPacket(c, len, &timer); // send the disconnect packet
c->isconnected = 0;
return rc;
}
int MQTTDisconnect(MQTTClient* c)
{
int rc = MQTT_FAILURE;
Timer timer; // we might wait for incomplete incoming publishes to complete
int len = 0;
platform_mutex_lock(&c->mutex);
platform_timer_init(&timer);
platform_timer_countdown(&timer, c->command_timeout_ms);
len = MQTTSerialize_disconnect(c->buf, c->buf_size);
if (len > 0)
rc = sendPacket(c, len, &timer); // send the disconnect packet
c->isconnected = 0;
platform_mutex_unlock(&c->mutex);
return rc;
}
/**
* @brief 向服务器订阅一个消息，该函数会因为TCP接收数据函数而阻塞
* @param pTopic 消息主题，传入
* @param pMessage 消息内容，传出
* @retval 小于0表示订阅消息失败
*/
int mqtt_subscrib(char *pTopic,char *pMessage)
{
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
int rc = 0;
unsigned char buf[200];
int buflen = sizeof(buf);
int msgid = 1;
MQTTString topicString = MQTTString_initializer;
int req_qos = 0;
int len = 0;
rc = transport_open();
if(rc < 0){
printf("transport_open error\n\r");
return rc;
}
data.clientID.cstring = "";
data.keepAliveInterval = 5;//服务器保持连接时间，超过该时间后，服务器会主动断开连接，单位为秒
data.cleansession = 1;
data.username.cstring = "";
data.password.cstring = "";
len = MQTTSerialize_connect(buf, buflen, &data);
rc = transport_sendPacketBuffer(buf, len);
if(rc != len){
printf("connect transport_sendPacketBuffer error\n\r");
goto exit;
}
/* wait for connack */
if (MQTTPacket_read(buf, buflen, transport_getdata) == CONNACK)
{
unsigned char sessionPresent, connack_rc;
if (MQTTDeserialize_connack(&sessionPresent, &connack_rc, buf, buflen) != 1 || connack_rc != 0)
{
printf("Unable to connect, return code %d\n\r", connack_rc);
goto exit;
}
}else{
printf("MQTTPacket_read error\n\r");
goto exit;
}
/* subscribe */
topicString.cstring = pTopic;
len = MQTTSerialize_subscribe(buf, buflen, 0, msgid, 1, &topicString, &req_qos);
rc = transport_sendPacketBuffer(buf, len);
if(rc != len){
printf("connect transport_sendPacketBuffer error\n\r");
goto exit;
}
if (MQTTPacket_read(buf, buflen, transport_getdata) == SUBACK) /* wait for suback */
{
unsigned short submsgid;
int subcount;
int granted_qos;
rc = MQTTDeserialize_suback(&submsgid, 1, &subcount, &granted_qos, buf, buflen);
if (granted_qos != 0)
{
printf("granted qos != 0, %d\n\r", granted_qos);
goto exit;
}
}
else
goto exit;
/* loop getting msgs on subscribed topic */
topicString.cstring = pTopic;
memset(buf,0,buflen);
//transport_getdata接收数据会阻塞，除非服务器断开连接后才返回
if (MQTTPacket_read(buf, buflen, transport_getdata) == PUBLISH){
unsigned char dup;
int qos;
unsigned char retained;
unsigned short msgid;
int payloadlen_in;
unsigned char* payload_in;
MQTTString receivedTopic;
rc = MQTTDeserialize_publish(&dup, &qos, &retained, &msgid, &receivedTopic,
&payload_in, &payloadlen_in, buf, buflen);
printf("message arrived %d: %s\n\r", payloadlen_in, payload_in);
strcpy(pMessage,(const char *)payload_in);
}
printf("disconnecting\n\r");
len = MQTTSerialize_disconnect(buf, buflen);
rc = transport_sendPacketBuffer(buf, len);
exit:
transport_close();
return rc;
}
int main()
{
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
int rc = 0;
char buf[200];
int buflen = sizeof(buf);
int msgid = 1;
MQTTString topicString = MQTTString_initializer;
int req_qos = 0;
char* payload = "mypayload";
int payloadlen = strlen(payload);
int len = 0;
signal(SIGINT, cfinish);
signal(SIGTERM, cfinish);
rc = Socket_new("127.0.0.1", 1883, &mysock);
data.clientID.cstring = "me";
data.keepAliveInterval = 20;
data.cleansession = 1;
data.username.cstring = "testuser";
data.password.cstring = "testpassword";
struct timeval tv;
tv.tv_sec = 1; /* 1 second Timeout */
tv.tv_usec = 0;
setsockopt(mysock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv,sizeof(struct timeval));
len = MQTTSerialize_connect(buf, buflen, &data);
rc = write(mysock, buf, len);
/* wait for connack */
if (MQTTPacket_read(buf, buflen, getdata) == CONNACK)
{
int connack_rc;
if (MQTTDeserialize_connack(&connack_rc, buf, buflen) != 1 || connack_rc != 0)
{
printf("Unable to connect, return code %d\n", connack_rc);
goto exit;
}
}
else
goto exit;
/* subscribe */
topicString.cstring = "substopic";
len = MQTTSerialize_subscribe(buf, buflen, 0, msgid, 1, &topicString, &req_qos);
rc = write(mysock, buf, len);
if (MQTTPacket_read(buf, buflen, getdata) == SUBACK) /* wait for suback */
{
int submsgid;
int subcount;
int granted_qos;
rc = MQTTDeserialize_suback(&submsgid, 1, &subcount, &granted_qos, buf, buflen);
if (granted_qos != 0)
{
printf("granted qos != 0, %d\n", granted_qos);
goto exit;
}
}
else
goto exit;
topicString.cstring = "pubtopic";
while (!toStop)
{
if (MQTTPacket_read(buf, buflen, getdata) == PUBLISH)
{
int dup;
int qos;
int retained;
int msgid;
int payloadlen_in;
char* payload_in;
int rc;
MQTTString receivedTopic;
rc = MQTTDeserialize_publish(&dup, &qos, &retained, &msgid, &receivedTopic,
&payload_in, &payloadlen_in, buf, buflen);
printf("message arrived %.*s\n", payloadlen_in, payload_in);
}
printf("publishing reading\n");
len = MQTTSerialize_publish(buf, buflen, 0, 0, 0, 0, topicString, payload, payloadlen);
rc = write(mysock, buf, len);
}
printf("disconnecting\n");
len = MQTTSerialize_disconnect(buf, buflen);
rc = write(mysock, buf, len);
exit:
rc = shutdown(mysock, SHUT_WR);
rc = recv(mysock, NULL, 0, 0);
rc = close(mysock);
return 0;
}
int main(int argc, char *argv[])
{
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
int rc = 0;
int mysock = 0;
unsigned char buf[200];
int buflen = sizeof(buf);
int msgid = 1;
MQTTString topicString = MQTTString_initializer;
int req_qos = 0;
char* payload = "mypayload";
int payloadlen = strlen(payload);
int len = 0;
char *host = "m2m.eclipse.org";
int port = 1883;
MQTTTransport mytransport;
stop_init();
if (argc > 1)
host = argv[1];
if (argc > 2)
port = atoi(argv[2]);
mysock = transport_open(host, port);
if(mysock < 0)
return mysock;
printf("Sending to hostname %s port %d\n", host, port);
mytransport.sck = &mysock;
mytransport.getfn = transport_getdatanb;
mytransport.state = 0;
data.clientID.cstring = "me";
data.keepAliveInterval = 20;
data.cleansession = 1;
data.username.cstring = "testuser";
data.password.cstring = "testpassword";
len = MQTTSerialize_connect(buf, buflen, &data);
rc = transport_sendPacketBuffer(mysock, buf, len);
/* wait for connack */
if (MQTTPacket_read(buf, buflen, transport_getdata) == CONNACK)
{
unsigned char sessionPresent, connack_rc;
if (MQTTDeserialize_connack(&sessionPresent, &connack_rc, buf, buflen) != 1 || connack_rc != 0)
{
printf("Unable to connect, return code %d\n", connack_rc);
goto exit;
}
}
else
goto exit;
/* subscribe */
topicString.cstring = "substopic";
len = MQTTSerialize_subscribe(buf, buflen, 0, msgid, 1, &topicString, &req_qos);
rc = transport_sendPacketBuffer(mysock, buf, len);
do {
int frc;
if ((frc=MQTTPacket_readnb(buf, buflen, &mytransport)) == SUBACK) /* wait for suback */
{
unsigned short submsgid;
int subcount;
int granted_qos;
rc = MQTTDeserialize_suback(&submsgid, 1, &subcount, &granted_qos, buf, buflen);
if (granted_qos != 0)
{
printf("granted qos != 0, %d\n", granted_qos);
goto exit;
}
break;
}
else if (frc == -1)
goto exit;
} while (1); /* handle timeouts here */
/* loop getting msgs on subscribed topic */
topicString.cstring = "pubtopic";
while (!toStop)
{
/* handle timeouts */
if (MQTTPacket_readnb(buf, buflen, &mytransport) == PUBLISH)
{
unsigned char dup;
int qos;
unsigned char retained;
unsigned short msgid;
int payloadlen_in;
unsigned char* payload_in;
int rc;
MQTTString receivedTopic;
rc = MQTTDeserialize_publish(&dup, &qos, &retained, &msgid, &receivedTopic,
&payload_in, &payloadlen_in, buf, buflen);
printf("message arrived %.*s\n", payloadlen_in, payload_in);
printf("publishing reading\n");
len = MQTTSerialize_publish(buf, buflen, 0, 0, 0, 0, topicString, (unsigned char*)payload, payloadlen);
rc = transport_sendPacketBuffer(mysock, buf, len);
}
}
printf("disconnecting\n");
len = MQTTSerialize_disconnect(buf, buflen);
rc = transport_sendPacketBuffer(mysock, buf, len);
exit:
transport_close(mysock);
return 0;
}
int main(int argc, char** argv) {
if (argc < 6) {
printf("Usage: mqtt_pub <host> <port> <client_id> <topic> <message>\n");
return 0;
}
/* parse arguments */
char* host = argv[1];
int port = atoi(argv[2]);
char* clientid = argv[3];
char* topic = argv[4];
char* message = argv[5];
/* resolv broker ip address */
struct hostent *he;
if((he = gethostbyname(host)) == NULL) {
perror("hostname error\n");
return 1;
}
/* try to connect to the broker */
struct sockaddr_in sa;
int sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
memset(&sa, 0, sizeof sa);
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
sa.sin_addr.s_addr = inet_addr(inet_ntoa(*((struct in_addr *)he->h_addr)));
if (connect(sock, (struct sockaddr *) &sa, sizeof sa) < 0) {
perror("error on connect\n");
close(sock);
return 2;
} else {
/* initialize and load mqtt helpers */
MQTTString topicString = MQTTString_initializer;
topicString.cstring = topic;
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
data.willFlag = 0;
data.MQTTVersion = 3;
data.clientID.cstring = clientid;
data.keepAliveInterval = 20;
data.cleansession = 1;
/* prepare the message */
char buf[1024];
int buflen = sizeof (buf);
int len = MQTTSerialize_connect(buf, buflen, &data);
len += MQTTSerialize_publish(buf + len, buflen - len, 0, 0, 0, 0, topicString, message, strlen(message));
len += MQTTSerialize_disconnect(buf + len, buflen - len);
/* send message */
int n = write(sock, buf, len);
if (n < 0) {
perror("error sending packet\n");
close(sock);
return 2;
} else {
printf("%i byte(s) sent\n", n);
}
}
/* close socket and exit */
close(sock);
return 0;
}
int main(int argc, char *argv[])
{
/******MQTT*******/
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
int rc = 0;
char buf[200];
int buflen = sizeof(buf);
int mysock = 0;
MQTTString topicString = MQTTString_initializer;
char* payload = "mypayload";
int payloadlen = strlen(payload);
int len = 0;
char *host = "192.168.8.241";
int port = 1883;
/******UART*******/
int fd = FALSE;
int ret;
char rcv_buf[512];
int i;
if(argc < 2){
printf("Usage: %s /dev/ttySn \n",argv[0]);
return FALSE;
}
if (argc > 2)
host = argv[2];
if (argc > 3)
port = atoi(argv[3]);
fd = UART_Open(fd,argv[1]);
if(FALSE == fd){
printf("open error\n");
exit(1);
}
ret = UART_Init(fd,9600,0,8,1,'N');
if (FALSE == fd){
printf("Set Port Error\n");
exit(1);
}
ret = UART_Send(fd,"*IDN?\n",6);
if(FALSE == ret){
printf("write error!\n");
exit(1);
}
printf("command: %s\n","*IDN?");
memset(rcv_buf,0,sizeof(rcv_buf));
/**************MQTT tansport*************/
mysock = transport_open(host,port);
if(mysock < 0)
return mysock;
printf("Sending to hostname %s port %d\n", host, port);
data.clientID.cstring = "me";
data.keepAliveInterval = 20;
data.cleansession = 1;
data.username.cstring = "testuser";
data.password.cstring = "testpassword";
data.MQTTVersion = 4;
for(i=0;;i++)
{
ret = UART_Recv(fd, rcv_buf,512);
if(ret > 0)
{
rcv_buf[ret]='\0';
printf("%s",rcv_buf);
len = MQTTSerialize_connect((unsigned char *)buf, buflen, &data);
topicString.cstring = "mytopic";
len += MQTTSerialize_publish((unsigned char *)(buf + len), buflen - len, 0, 0, 0, 0, topicString, (unsigned char *)rcv_buf, ret+1);
len += MQTTSerialize_disconnect((unsigned char *)(buf + len), buflen - len);
rc = transport_sendPacketBuffer(mysock, buf, len);
if (rc == len)
printf("Successfully published\n");
else
printf("Publish failed\n");
}
else
{
printf("cannot receive data1\n");
break;
}
}
exit:
UART_Close(fd);
transport_close(mysock);
return 0;
}
