func msgFromPayload(payload []byte) (*pb_protocol.Message, error) {
var phy lorawan.PHYPayload
if err := phy.UnmarshalBinary(payload); err != nil {
return nil, err
}
msg := pb_lorawan.MessageFromPHYPayload(phy)
return &pb_protocol.Message{Protocol: &pb_protocol.Message_Lorawan{Lorawan: &msg}}, nil
}
// UnmarshalPayload unmarshals the Payload into Message if Message is nil
func (m *DeviceActivationResponse) UnmarshalPayload() error {
if m.GetMessage() == nil && m.GetDownlinkOption() != nil && m.DownlinkOption.GetProtocolConfig() != nil && m.DownlinkOption.ProtocolConfig.GetLorawan() != nil {
var phy lorawan.PHYPayload
if err := phy.UnmarshalBinary(m.Payload); err != nil {
return err
}
msg := pb_lorawan.MessageFromPHYPayload(phy)
m.Message = &pb_protocol.Message{Protocol: &pb_protocol.Message_Lorawan{Lorawan: &msg}}
}
return nil
}
}
time.Sleep(100 * time.Millisecond)
ctx.Info("Sent uplink to Router")
select {
case downlinkMessage, ok := <-downlinkStream.Channel():
if !ok {
ctx.Info("Did not receive downlink")
break
}
downlinkMessage.UnmarshalPayload()
resPhy := downlinkMessage.Message.GetLorawan().PHYPayload()
resPhy.DecryptJoinAcceptPayload(lorawan.AES128Key(appKey))
res := pb_lorawan.MessageFromPHYPayload(resPhy)
accept := res.GetJoinAcceptPayload()
appSKey, nwkSKey, _ := otaa.CalculateSessionKeys(appKey, accept.AppNonce, accept.NetId, devNonce)
ctx.WithFields(log.Fields{
"DevAddr": accept.DevAddr,
"NwkSKey": nwkSKey,
"AppSKey": appSKey,
}).Info("Received JoinAccept")
case <-time.After(6 * time.Second):
ctx.Info("Did not receive downlink")
}
},
}