/**
* @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 MQTTConnect(Client* c, MQTTPacket_connectData* options)
{
// Timer connect_timer;
int rc = FAILURE;
MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
int len = 0;
// InitTimer(&connect_timer);
// countdown_ms(&connect_timer, c->command_timeout_ms);
if (c->isconnected) // don't send connect packet again if we are already connected
goto exit;
if (options == 0)
options = &default_options; // set default options if none were supplied
c->keepAliveInterval = options->keepAliveInterval;
// countdown(&c->ping_timer, c->keepAliveInterval);
if ((len = MQTTSerialize_connect(c->buf, c->buf_size, options)) <= 0)
goto exit;
if ((rc = sendPacket_ev(c, len)) != SUCCESS) // send the connect packet
goto exit; // there was a problem
rc = SUCCESS;
exit:
return rc;
}
int MQTTConnect (Client *c, MQTTPacket_connectData *options)
{
Timer connect_timer;
int rc = FAILURE;
int len = 0;
MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
InitTimer (&connect_timer);
countdown_ms (&connect_timer, c->command_timeout_ms);
if (c->isconnected) // don't send connect packet again if we are already connected
goto exit;
if (options == 0)
options = &default_options; // set default options if none were supplied
c->keepAliveInterval = options->keepAliveInterval;
countdown (&c->ping_timer, c->keepAliveInterval);
//--------------------------------------------------------------------
// Generate a MQTT "Connect" packet, and send it to the remote Broker
//--------------------------------------------------------------------
len = MQTTSerialize_connect (c->buf, c->buf_size, options);
if (len <= 0)
goto exit; // supplied buffer is too small
rc = sendPacket (c, len, &connect_timer); // send the connect packet
if (rc != SUCCESS)
goto exit; // there was a problem
//--------------------------------------------------------------------
// Wait for and read in the MQTT "ConnAck" reply packet.
//--------------------------------------------------------------------
// this will be a blocking call, wait for the connack
if (waitfor(c, CONNACK, &connect_timer) == CONNACK)
{
unsigned char connack_rc = 255;
char sessionPresent = 0;
if (MQTTDeserialize_connack((unsigned char*) &sessionPresent, &connack_rc,
c->readbuf, c->readbuf_size) == 1)
rc = connack_rc;
else rc = FAILURE;
}
else rc = FAILURE;
exit:
if (rc == SUCCESS)
c->isconnected = 1;
return rc;
}
int MQTTConnect(Client* c, MQTTPacket_connectData* options)
{
Timer connect_timer;
int rc = FAILURE;
MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
int len = 0;
InitTimer(&connect_timer);
countdown_ms(&connect_timer, c->command_timeout_ms);
if (c->isconnected) // don't send connect packet again if we are already connected
goto exit;
if (options == 0)
options = &default_options; // set default options if none were supplied
c->keepAliveInterval = options->keepAliveInterval;
countdown(&c->ping_timer, c->keepAliveInterval);
if ((len = MQTTSerialize_connect(c->buf, c->buf_size, options)) <= 0)
goto exit;
if ((rc = sendPacket(c, len, &connect_timer)) != SUCCESS) // send the connect packet
goto exit; // there was a problem
// this will be a blocking call, wait for the connack
if (waitfor(c, CONNACK, &connect_timer) == CONNACK)
{
unsigned char connack_rc = 255;
char sessionPresent = 0;
if (MQTTDeserialize_connack((unsigned char*)&sessionPresent, &connack_rc, c->readbuf, c->readbuf_size) == 1)
rc = connack_rc;
else
rc = FAILURE;
}
else
rc = FAILURE;
exit:
if (rc == SUCCESS)
c->isconnected = 1;
DeInitTimer(&connect_timer); //STM: added this line of code
return rc;
}
int MQTTConnect(MQTTClient* c, MQTTPacket_connectData* options)
{
Timer connect_timer;
int rc = MQTT_FAILURE;
MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
int len = 0;
platform_mutex_lock(&c->mutex);
if (c->isconnected) /* don't send connect packet again if we are already connected */
goto exit;
platform_timer_init(&connect_timer);
platform_timer_countdown(&connect_timer, c->command_timeout_ms);
if (options == 0)
options = &default_options; /* set default options if none were supplied */
c->ping_outstanding = 0;
c->keepAliveInterval = options->keepAliveInterval;
platform_timer_countdown(&c->ping_timer, c->keepAliveInterval*1000);
if ((len = MQTTSerialize_connect(c->buf, c->buf_size, options)) <= 0)
goto exit;
if ((rc = sendPacket(c, len, &connect_timer)) != MQTT_SUCCESS) // send the connect packet
goto exit; // there was a problem
// this will be a blocking call, wait for the connack
if (waitfor(c, CONNACK, &connect_timer) == CONNACK)
{
unsigned char connack_rc = 255;
unsigned char sessionPresent = 0;
if (MQTTDeserialize_connack(&sessionPresent, &connack_rc, c->readbuf, c->readbuf_size) == 1)
rc = connack_rc;
else
rc = MQTT_FAILURE;
}
else
rc = MQTT_FAILURE;
exit:
if (rc == MQTT_SUCCESS)
c->isconnected = 1;
platform_mutex_unlock(&c->mutex);
return rc;
}
int MQTTConnect(MQTTClient* c, MQTTPacket_connectData* options)
{
Timer connect_timer;
int rc = FAILURE;
MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
int len = 0;
#if defined(MQTT_TASK)
FreeRTOS_MutexLock(&c->mutex);
#endif
if (c->isconnected) /* don't send connect packet again if we are already connected */
goto exit;
TimerInit(&connect_timer);
TimerCountdownMS(&connect_timer, c->command_timeout_ms);
if (options == 0)
options = &default_options; /* set default options if none were supplied */
c->keepAliveInterval = options->keepAliveInterval;
TimerCountdown(&c->ping_timer, c->keepAliveInterval);
if ((len = MQTTSerialize_connect(c->buf, c->buf_size, options)) <= 0)
goto exit;
if ((rc = sendPacket(c, len, &connect_timer)) != SUCCESS)
goto exit;
// this will be a blocking call, wait for the connack
if (waitfor(c, CONNACK, &connect_timer) == CONNACK) {
unsigned char connack_rc = 255;
unsigned char sessionPresent = 0;
if (MQTTDeserialize_connack(&sessionPresent, &connack_rc, c->readbuf, c->readbuf_size) == 1)
rc = connack_rc;
else
rc = FAILURE;
} else
rc = FAILURE;
exit:
if (rc == SUCCESS)
c->isconnected = 1;
#if defined(MQTT_TASK)
FreeRTOS_MutexUnlock(&c->mutex);
#endif
return rc;
}
static int mqttClient_sendConnect(mqttClient_t* clientData, MQTTPacket_connectData* connectData)
{
int rc = LE_OK;
LE_ASSERT(clientData);
LE_ASSERT(connectData);
if (clientData->session.isConnected)
{
LE_WARN("already connected");
goto cleanup;
}
int len = MQTTSerialize_connect(clientData->session.tx.buf, sizeof(clientData->session.tx.buf), connectData);
if (len <= 0)
{
LE_ERROR("MQTTSerialize_connect() failed(%d)", len);
rc = len;
goto cleanup;
}
LE_DEBUG("<--- CONNECT");
rc = mqttClient_write(clientData, len);
if (rc)
{
LE_ERROR("mqttClient_write() failed(%d)", rc);
goto cleanup;
}
rc = le_timer_Start(clientData->session.cmdTimer);
if (rc)
{
LE_ERROR("le_timer_Start() failed(%d)", rc);
goto cleanup;
}
cleanup:
return rc;
}
int mqtt_connect(mqtt_client_t *c, MQTTPacket_connectData *data)
{
int rc = -1;
int len;
len = MQTTSerialize_connect(c->wbuf, c->wbuflen, data);
if (len <= 0)
goto exit;
rc = mqtt_write(c->sockfd, c->wbuf, len);
if (rc < 0)
goto exit;
rc = MQTTPacket_read(c->rbuf, c->rbuflen, c->getfn);
if (rc < 0)
goto exit;
if (rc == CONNACK)
{
unsigned char sessionPresent, connack_rc;
if (MQTTDeserialize_connack(&sessionPresent, &connack_rc, c->rbuf, c->rbuflen) == 1)
{
rc = connack_rc;
}
else
{
rc = -1;
}
}
else
rc = -1;
exit:
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 MQTTConnectWithResults(MQTTClient *c, MQTTPacket_connectData *options, MQTTConnackData *data)
{
Timer connect_timer;
int rc = FAILURE;
MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
int len = 0;
#if defined(MQTT_TASK)
MutexLock(&c->mutex);
#endif
if (c->isconnected) { /* don't send connect packet again if we are already connected */
goto exit;
}
TimerInit(&connect_timer);
TimerCountdownMS(&connect_timer, c->command_timeout_ms);
if (options == 0) {
options = &default_options; /* set default options if none were supplied */
}
c->keepAliveInterval = options->keepAliveInterval;
c->cleansession = options->cleansession;
TimerCountdown(&c->last_received, c->keepAliveInterval);
if ((len = MQTTSerialize_connect(c->buf, c->buf_size, options)) <= 0) {
goto exit;
}
if ((rc = sendPacket(c, len, &connect_timer)) != SUCCESS) { // send the connect packet
goto exit; // there was a problem
}
// this will be a blocking call, wait for the connack
if (waitfor(c, CONNACK, &connect_timer) == CONNACK) {
data->rc = 0;
data->sessionPresent = 0;
if (MQTTDeserialize_connack(&data->sessionPresent, &data->rc, c->readbuf, c->readbuf_size) == 1) {
rc = data->rc;
} else {
rc = FAILURE;
}
} else {
rc = FAILURE;
}
exit:
if (rc == SUCCESS) {
c->isconnected = 1;
c->ping_outstanding = 0;
}
#if defined(MQTT_TASK)
MutexUnlock(&c->mutex);
#endif
return rc;
}
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;
}
