void QvisController::createTCPThread()
{
if (ui->getPort() != 3490) {
ui->setInfoText("Atlas is on port 3940");
return;
}
ui->setConnectionStatus(true);
tcpSocket = new QTcpSocket(this);
connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readTCP()));
connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(displayError(QAbstractSocket::SocketError)));
tcpSocket->connectToHost(ui->getIp(),ui->getPort());
QObject::connect(ui->connectButton, SIGNAL(clicked()), this, SLOT(closeTCP()));
std::cout << "Connection button set to close" << std::endl;
tcpSocket->write(getSendData(), 54);
ui->setConnected();
}
int main(int argc, char *argv[])
{
int sockfd; //Socket descriptor
int portno, bytesrecv;
double p_loss, p_corr;
char * filename; // name of file to be requested
byte_t * filebodyPtr[1] = {NULL};
byte_t * filebody;
int nbytes = 0;
char * hostname; // host name of server
char buf[BUFLEN];
struct sockaddr_in serv_addr; // server address
struct timeval tv;
socklen_t servlen = sizeof(serv_addr);
struct hostent *server; //contains tons of information, including the server's IP address
if (argc != 6) {
error("ERROR, usage ./client server_hostname server_portnumber filename P_l P_c");
}
hostname = argv[1];
portno = atoi(argv[2]);
filename = argv[3];
p_loss = atof(argv[4]);
p_corr = atof(argv[5]);
/* create UDP socket */
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) //create a new socket
error("ERROR opening socket");
server = gethostbyname(hostname); //takes a string like "www.yahoo.com", and returns a struct hostent which contains information, as IP address, address type, the length of the addresses...
if (server == NULL) {
error("ERROR, host assignment");
}
memset((char *) &serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET; //initialize server's address
bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length);
serv_addr.sin_port = htons(portno);
//Set timeout value for recvfrom
tv.tv_sec = 0;
tv.tv_usec = 1000*TIMEOUT_MS; // Set the timeout microsecond value using number of milliseconds
if(setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0)
error("ERROR: set timeout option\n");
/* Request file from the server */
memset(buf,0, BUFLEN);
bcopy(filename, buf, strlen(filename));
printf("Requesting file: %s\n", filename);
writeTCP(sockfd, (struct sockaddr *)&serv_addr, servlen, filename, strlen(filename)+1,4096, p_loss, p_corr);
//reading from server
filebody = NULL;
nbytes = readTCP(sockfd, (struct sockaddr *)&serv_addr, servlen, filebodyPtr,4096, p_loss, p_corr);
filebody=*filebodyPtr;
if(filebody != NULL)
{
char * rcv_filename = malloc(sizeof(char)*(strlen(filename)+4+1));
strcpy(rcv_filename, "rcv_");
strcpy(&(rcv_filename[4]), filename);
writeFile(rcv_filename, filebody, nbytes);
free(rcv_filename);
}
printf("client: start\n\tbytes read=%d\nreadTCP=\n%s\nclient: end\n",nbytes, filebody);
free(filebody);
close(sockfd); //close socket
return 0;
}
