void
PeerInfo::setStatus( PeerInfo::Status status )
{
d_func()->status = status;
if ( status == Online )
{
announce();
}
else if ( status == Offline && controlConnection() )
{
controlConnection()->removePeerInfo( weakRef().toStrongRef() );
}
// we need this to update the DiagnosticsDialog on new peers
// if we ever happen to have a central PeerInfo manager object
// we better add it there, but so far this would be the only
// usage
emit sipPlugin()->peerStatusChanged( weakRef().toStrongRef() );
}
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent), ui(new Ui::MainWindowClass)
{
ui->setupUi(this);
socket = new JagunKET(this);
connected = false;
connect(ui->btnConexao,SIGNAL(clicked()),this,SLOT(controlConnection()));
connect(socket,SIGNAL(connected()),this,SLOT(connectedServer()));
connect(socket,SIGNAL(disconnected()),this,SLOT(disconnectServer()));
connect(socket,SIGNAL(sentData()),this,SLOT(confirmSend()));
connect(ui->btnEnviar,SIGNAL(clicked()),this,SLOT(sendData()));
}
/******************************************************************************
** startServer()
** Description: A function that listens on inputed port, and interacts with
** one client user, and remains open after the user connection terminates for
** more client users. Used in main function.
** Parameters: port that server user enters
** Output: none
******************************************************************************/
void startServer(int port){
// endpoint socket that receives requests
int serverSocket;
int status;
// set up signal for handling ctrl c exit
struct sigaction interrupt;
// get server address
struct sockaddr_in serverAddress;
// specify what type of socket addressing used (IPv4)
serverAddress.sin_family = AF_INET;
// convert address host to network short
serverAddress.sin_port = htons(port);
// bind socket to INNADD_ANY (all available interfaces, not just localhost)
// source: http://stackoverflow.com/questions/16508685/understanding-inaddr-any-for-socket-programming-c
serverAddress.sin_addr.s_addr = INADDR_ANY;
// set the server side socket
serverSocket = socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket == -1) {
perror("socket");
exit(1);
}
// bind the new server socket with the port
status = bind(serverSocket, (struct sockaddr*) &serverAddress, sizeof(serverAddress));
if (status == -1) {
perror("bind");
exit(1);
}
// listen for client user connections, up to 10
status = listen(serverSocket, 10);
if (status == -1) {
perror("listen");
exit(1);
}
// ready stopServer() to catch any interrupt signals
interrupt.sa_handler = &stopServer;
interrupt.sa_flags = 0;
sigemptyset(&interrupt.sa_mask);
status = sigaction(SIGINT, &interrupt, 0);
if (status == -1) {
perror("sigaction");
exit(1);
}
// start running on port, waiting for client user connections (data or control)
printf("ftserver: Server open on port %d\n", port);
while (1) {
// variable for printing client IP (in decimal form)
char *clientIPv4;
// variables for command tags and filename buffers
char userCommand[TAG_LENGTH + 1];
char filename[PAYLOAD_LENGTH + 1];
// server side socket endpoints
int controlSocket, dataSocket;
// client data port number
int dataPort;
// address struct length
// http://pubs.opengroup.org/onlinepubs/7908799/xns/syssocket.h.html
socklen_t addrLen;
struct sockaddr_in clientAddress;
// start file transfer connection with client
addrLen = sizeof(struct sockaddr_in);
controlSocket = accept(serverSocket, (struct sockaddr *) &clientAddress, &addrLen);
if (controlSocket == -1) {
perror("accept");
exit(1);
}
//
clientIPv4 = inet_ntoa(clientAddress.sin_addr);
printf("\nftserver: Control connection established with \"%s\"\n", clientIPv4);
// controlConnection() to send/receive packets with client user requests
status = controlConnection(controlSocket, userCommand, &dataPort, filename);
// if packets understood, proceed to the data connection (where fileList or files are sent)
if (status != -1) {
int connectionAttempts;
// set server side endpoint for data connection
dataSocket = socket(AF_INET, SOCK_STREAM, 0);
if (dataSocket == -1) {
perror("socket");
exit(1);
}
// start data connection with client user
clientAddress.sin_port = htons(dataPort);
connectionAttempts = 0;
do {
status = connect(dataSocket, (struct sockaddr *) &clientAddress, sizeof(clientAddress));
// max number of connection attempts is set at 10
} while (status == -1 && connectionAttempts < 10);
if (status == -1) {
perror("connect");
exit(1);
}
printf("ftserver: Data connection established with \"%s\"\n", clientIPv4);
// call dataConnection to transfer file list or files to client user
dataConnection(controlSocket, dataSocket, userCommand, filename);
// wait to receive packet from user that the trasfer or listing is DONE (in tag)
receivePacket(controlSocket, NULL, NULL);
// close the data connection, client can reconnect for more interactions
status = close(dataSocket);
if (status == -1) {
perror("close");
exit(1);
}
printf("ftserver: Data connection closed\n");
}
}
}
