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[LoRaWAN] Keep Dev/JoinNonce on OTAA wipe with same credentials

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This commit is contained in:
StevenCellist 2024-01-23 09:04:25 +01:00
parent 9008fb00a7
commit 51ab103d07
1 changed files with 17 additions and 11 deletions
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28
src/protocols/LoRaWAN/LoRaWAN.cpp
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@ -400,12 +400,21 @@ int16_t LoRaWANNode::beginOTAA(uint64_t joinEUI, uint64_t devEUI, uint8_t* nwkKe
bool validCheckSum = mod->hal->getPersistentParameter<uint16_t>(RADIOLIB_EEPROM_LORAWAN_CHECKSUM_ID) == checkSum;
bool validMode = mod->hal->getPersistentParameter<uint16_t>(RADIOLIB_EEPROM_LORAWAN_MODE_ID) == RADIOLIB_LORAWAN_MODE_OTAA;
if(!force && validCheckSum && validMode) {
// the device has joined already, we can just pull the data from persistent storage
RADIOLIB_DEBUG_PRINTLN("Found existing session; restoring...");
return(this->restore());
} else {
if(validCheckSum && validMode) {
if(!force) {
// the device has joined already, we can just pull the data from persistent storage
RADIOLIB_DEBUG_PRINTLN("Found existing session; restoring...");
return(this->restore());
} else {
// the credentials are still the same, so restore only DevNonce and JoinNonce
this->devNonce = mod->hal->getPersistentParameter<uint16_t>(RADIOLIB_EEPROM_LORAWAN_DEV_NONCE_ID);
this->joinNonce = mod->hal->getPersistentParameter<uint32_t>(RADIOLIB_EEPROM_LORAWAN_JOIN_NONCE_ID);
}
}
// if forced by user, keys are new or changed mode, wipe the previous session
if(force || !validCheckSum || !validMode) {
#if RADIOLIB_DEBUG
RADIOLIB_DEBUG_PRINTLN("Didn't restore session (checksum: %d, mode: %d)", validCheckSum, validMode);
RADIOLIB_DEBUG_PRINTLN("First 16 bytes of NVM:");
@ -657,6 +666,7 @@ int16_t LoRaWANNode::beginOTAA(uint64_t joinEUI, uint64_t devEUI, uint8_t* nwkKe
// save join-request parameters
mod->hal->setPersistentParameter<uint32_t>(RADIOLIB_EEPROM_LORAWAN_HOME_NET_ID, this->homeNetId);
mod->hal->setPersistentParameter<uint32_t>(RADIOLIB_EEPROM_LORAWAN_DEV_NONCE_ID, this->devNonce);
mod->hal->setPersistentParameter<uint32_t>(RADIOLIB_EEPROM_LORAWAN_JOIN_NONCE_ID, this->joinNonce);
this->saveSession();
@ -766,14 +776,10 @@ bool LoRaWANNode::isJoined() {
#if !defined(RADIOLIB_EEPROM_UNSUPPORTED)
int16_t LoRaWANNode::saveSession() {
Module* mod = this->phyLayer->getMod();
// store session configuration (MAC commands)
if(mod->hal->getPersistentParameter<uint8_t>(RADIOLIB_EEPROM_LORAWAN_VERSION_ID) != this->rev)
mod->hal->setPersistentParameter<uint8_t>(RADIOLIB_EEPROM_LORAWAN_VERSION_ID, this->rev);
if(mod->hal->getPersistentParameter<uint16_t>(RADIOLIB_EEPROM_LORAWAN_DEV_NONCE_ID) != this->devNonce)
mod->hal->setPersistentParameter<uint16_t>(RADIOLIB_EEPROM_LORAWAN_DEV_NONCE_ID, this->devNonce);
// store all frame counters
if(mod->hal->getPersistentParameter<uint32_t>(RADIOLIB_EEPROM_LORAWAN_A_FCNT_DOWN_ID) != this->aFcntDown)
mod->hal->setPersistentParameter<uint32_t>(RADIOLIB_EEPROM_LORAWAN_A_FCNT_DOWN_ID, this->aFcntDown);