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[LoRaWAN] Fix possible integer overflow

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This commit is contained in:
jgromes 2025-01-18 21:23:01 +01:00
parent 269eb2fe38
commit cbb8126442
1 changed files with 3 additions and 3 deletions
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6
src/protocols/LoRaWAN/LoRaWAN.cpp
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@ -2958,11 +2958,11 @@ void LoRaWANNode::getChannelPlanMask(uint64_t* chMaskGrp0123, uint32_t* chMaskGr
// if a subband is set, we can set the channel indices straight from subband
if(this->subBand > 0 && this->subBand <= 8) {
// for sub band 1-8, set bank of 8 125kHz + single 500kHz channel
*chMaskGrp0123 |= 0xFF << ((this->subBand - 1) * 8);
*chMaskGrp45 |= 0x01 << ((this->subBand - 1) * 8);
*chMaskGrp0123 |= (uint64_t)0xFF << ((this->subBand - 1) * 8);
*chMaskGrp45 |= (uint32_t)0x01 << (this->subBand - 1);
} else if(this->subBand > 8 && this->subBand <= 12) {
// CN500 only: for sub band 9-12, set bank of 8 125kHz channels
*chMaskGrp45 |= 0xFF << ((this->subBand - 9) * 8);
*chMaskGrp45 |= (uint32_t)0xFF << ((this->subBand - 9) * 8);
} else {
// if subband is set to 0, all 125kHz channels are enabled.
// however, we can 'only' store 16 channels, so we don't use all channels at once.