/*! Construct the hardware resource UpnpDiscovery with the given \a parent. */
UpnpDiscovery::UpnpDiscovery(QObject *parent) :
QUdpSocket(parent)
{
// bind udp socket and join multicast group
m_port = 1900;
m_host = QHostAddress("239.255.255.250");
setSocketOption(QAbstractSocket::MulticastTtlOption,QVariant(1));
setSocketOption(QAbstractSocket::MulticastLoopbackOption,QVariant(1));
if(!bind(QHostAddress::AnyIPv4, m_port, QUdpSocket::ShareAddress)){
qCWarning(dcHardware) << "UPnP discovery could not bind to port" << m_port;
return;
}
if(!joinMulticastGroup(m_host)){
qCWarning(dcHardware) << "UPnP discovery could not join multicast group" << m_host;
return;
}
// network access manager for requesting device information
m_networkAccessManager = new QNetworkAccessManager(this);
connect(m_networkAccessManager, &QNetworkAccessManager::finished, this, &UpnpDiscovery::replyFinished);
connect(this,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(error(QAbstractSocket::SocketError)));
connect(this, &UpnpDiscovery::readyRead, this, &UpnpDiscovery::readData);
qCDebug(dcHardware) << "--> UPnP discovery created successfully.";
}
bool UDPSocket::startIPMulticastListening(const QHostAddress &ipMulticastGroupAddress, quint16 ipMulticastGroupPort){
// if(!ipMulticastSocket){
// ipMulticastSocket = new IPMulticastSocket(this);
// }else{
// if((ipMulticastSocket->getMulticastGroupAddress() == ipMulticastGroupAddress) && (ipMulticastSocket->getPort() == ipMulticastGroupPort)){
// qWarning("Server already started!");
// return true;
// }
// ipMulticastSocket->leaveGroup();
// }
// close();
// ipMulticastSocket->setUdpSocket(this);
// bool bound = ipMulticastSocket->startIPMulticastListening(ipMulticastGroupAddress, ipMulticastGroupPort);
close();
listeningState = NotListening;
//bool bound = bind(ipMulticastGroupPort, QUdpSocket::ShareAddress);
bool bound = bind(QHostAddress::AnyIPv4, ipMulticastGroupPort, QUdpSocket::ShareAddress);
if(!bound){
return bound;
}
bound = joinMulticastGroup(ipMulticastGroupAddress);
if(bound){
listeningState = IPMulticastListening;
}
return bound;
}
int main(int argc, char *argv[])
{
int receivingSocket, sendingSocket;
u_char ttl;
struct sockaddr_in mcast_group;
struct utsname name;
if ((argc < 3) || (argc > 4)) {
fprintf(stderr, "Usage: %s mcast_group port [ttl]\n", argv[0]);
exit(1);
}
memset(&mcast_group, 0, sizeof(mcast_group));
mcast_group.sin_family = AF_INET;
mcast_group.sin_port = htons((unsigned short int)strtol(argv[2], NULL, 0));
mcast_group.sin_addr.s_addr = inet_addr(argv[1]);
allocateSocket(&sendingSocket);
ttl = (argc == 4) ? strtol(argv[3], NULL, 0) : TTL;
allocateSocket(&receivingSocket);
enableSocketReuse(&receivingSocket);
enableMulticastLoop(&receivingSocket);
bindSocket(&receivingSocket, mcast_group);
joinMulticastGroup(mcast_group.sin_addr, &receivingSocket);
getSystemNodeName(&name);
char buffer[MAXLEN + 1];
FILE *fp;
if (fork() == 0) {
setsid();
chdir("/");
uname(0);
openlog("mcshd", LOG_CONS, LOG_USER);
for (;;) {
memset(buffer, 0, sizeof(buffer));
recvfrom(receivingSocket, buffer, MAXLEN, 0, NULL, NULL);
if (strstr(buffer, "STARTOFCOMMAND: ") != NULL) {
syslog(LOG_INFO, "Received command: %s", buffer);
fp = popen(buffer+16, "r");
if (fp != NULL) {
while (fgets(buffer, MAXLEN, fp) != NULL) {
sendto(sendingSocket, buffer, strlen(buffer)+1, 0, (const struct sockaddr *)&mcast_group, sizeof(mcast_group));
}
snprintf(buffer, MAXLEN, "ENDOFCOMMAND");
sendto(sendingSocket, buffer, strlen(buffer)+1, 0, (const struct sockaddr *)&mcast_group, sizeof(mcast_group));
pclose(fp);
}
}
}
}
exit(0);
}
void NetworkManager::init(const HWND hWnd)
{
startWinsock();
joinMulticastGroup(hWnd);
setupPeerListener(hWnd);
}
bool MulticastSocket::joinMulticastGroup(const QHostAddress &groupAddress)
{
return joinMulticastGroup(groupAddress, QNetworkInterface());
}
