Someone

  switch (frontendType) {
    case FE_QPSK:  // DVB-S
    case FE_DVB_S:  // DVB-S
    case FE_DVB_S2: { // DVB-S 

         unsigned int frequency = channel.Frequency();

         if (Setup.DiSEqC) {
            cDiseqc *diseqc = Diseqcs.Get(channel.Source(), channel.Frequency(), channel.Polarization());
            if (diseqc) {
               if (diseqc->Commands() && (!diseqcCommands || strcmp(diseqcCommands, diseqc->Commands()) != 0)) {
                  cDiseqc::eDiseqcActions da;
                  for (char *CurrentAction = NULL; (da = diseqc->Execute(&CurrentAction)) != cDiseqc::daNone; ) {
                      switch (da) {
                        case cDiseqc::daNone:      break;
                        case cDiseqc::daToneOff:   CHECK(ioctl(fd_frontend, FE_SET_TONE, SEC_TONE_OFF)); break;
                        case cDiseqc::daToneOn:    CHECK(ioctl(fd_frontend, FE_SET_TONE, SEC_TONE_ON)); break;
                        case cDiseqc::daVoltage13: CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_13)); break;
                        case cDiseqc::daVoltage18: CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_18)); break;
                        case cDiseqc::daMiniA:     CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_BURST, SEC_MINI_A)); break;
                        case cDiseqc::daMiniB:     CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_BURST, SEC_MINI_B)); break;
                        case cDiseqc::daCodes: {
                             int n = 0;
                             uchar *codes = diseqc->Codes(n);
                             if (codes) {
                                struct dvb_diseqc_master_cmd cmd;
                                memcpy(cmd.msg, codes, min(n, int(sizeof(cmd.msg))));
                                cmd.msg_len = n;
                                CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_MASTER_CMD, &cmd));
                                }
                             }
                             break;
                        }
                      }
                  diseqcCommands = diseqc->Commands();
                  }
               frequency -= diseqc->Lof();
               }
            else {
               esyslog("ERROR: no DiSEqC parameters found for channel %d", channel.Number());
               return false;
               }
            }
         else {
            int tone = SEC_TONE_OFF;

            if (frequency < (unsigned int)Setup.LnbSLOF) {
               frequency -= Setup.LnbFrequLo;
               tone = SEC_TONE_OFF;
               }
            else {
               frequency -= Setup.LnbFrequHi;
               tone = SEC_TONE_ON;
               }
            int volt = (channel.Polarization() == 'v' || channel.Polarization() == 'V' || channel.Polarization() == 'r' || channel.Polarization() == 'R') ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18;
            CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, volt));
            CHECK(ioctl(fd_frontend, FE_SET_TONE, tone));
            }

         frequency = abs(frequency); // Allow for C-band, where the frequency is less than the LOF
         Frontend.frequency = frequency * 1000UL;
         Frontend.inversion = fe_spectral_inversion_t(channel.Inversion());
         Frontend.u.qpsk.fec_inner = fe_code_rate_t(channel.CoderateH());
         if (frontendType == FE_DVB_S2) {
            Frontend.u.qpsk2.symbol_rate = channel.Srate() * 1000UL;
            Frontend.u.qpsk2.fec_inner = fe_code_rate_t(channel.CoderateH());
            Frontend.u.qpsk2.modulation = fe_modulation_t(channel.Modulation());
       	 }
       	 else {
            Frontend.u.qpsk.symbol_rate = channel.Srate() * 1000UL;
            Frontend.u.qpsk.fec_inner = fe_code_rate_t(channel.CoderateH());
     	 }

         tuneTimeout = DVBS_TUNE_TIMEOUT;
         lockTimeout = DVBS_LOCK_TIMEOUT;
         }
         break;