client->signal_connected().connect(SigC::slot(on_connected));
client->signal_ok_received().connect(SigC::slot(on_ok_received));
client->signal_error_received().connect(SigC::slot(on_error_received));
client->signal_connected().connect(SigC::slot(on_connected));
client->signal_ok_received().connect(SigC::slot(on_ok_received));
client->signal_error_received().connect(SigC::slot(on_error_received));