Method decrypt_frm_payload

chirpstack/src/uplink/data.rs:591–615

(&mut self)

    }

    fn decrypt_frm_payload(&mut self) -> Result<()> {
        trace!("Decrypting FRMPayload");
        let ds = self.device.as_ref().unwrap().get_device_session()?;
        let mut f_port = 0;

        if let lrwn::Payload::MACPayload(pl) = &self.phy_payload.payload {
            f_port = pl.f_port.unwrap_or(0);
        }

        // Mac-commands (f_port=0) or Relay payload (f_port=226).
        if f_port == 0 || f_port == lrwn::LA_FPORT_RELAY {
            let nwk_s_enc_key = AES128Key::from_slice(&ds.nwk_s_enc_key)?;
            if let Err(e) = self.phy_payload.decrypt_frm_payload(&nwk_s_enc_key) {
                // This avoids failing in case of a corrupted mac-command in the frm_payload.
                warn!(error = %e.full(), "Decrypting frm_payload failed");
            }
        } else if !self._is_end_to_end_encrypted()
            && let Some(app_s_key) = &ds.app_s_key
        {
            let app_s_key = AES128Key::from_slice(&app_s_key.aes_key)?;
            self.phy_payload.decrypt_frm_payload(&app_s_key)?;
        }

        Ok(())
    }

    async fn log_uplink_frame_set(&self) -> Result<()> {
        trace!("Logging uplink frame-set");