Function handle

chirpstack/src/maccommand/device_time.rs:11–36

(
    uplink_frame_set: &UplinkFrameSet,
    dev: &device::Device,
    block: &lrwn::MACCommandSet,
)

use crate::uplink::{UplinkFrameSet, helpers};

pub fn handle(
    uplink_frame_set: &UplinkFrameSet,
    dev: &device::Device,
    block: &lrwn::MACCommandSet,
) -> Result<Option<lrwn::MACCommandSet>> {
    let _ = (**block)
        .first()
        .ok_or_else(|| anyhow!("Expected DeviceTimeReq"))?;

    let rx_time: DateTime<Utc> = helpers::get_rx_timestamp(&uplink_frame_set.rx_info_set).into();
    let gps_time = rx_time.to_gps_time();

    info!(dev_eui = %dev.dev_eui, rx_time = %rx_time, gps_time = %gps_time.num_seconds(), "DeviceTimeReq received");

    Ok(Some(lrwn::MACCommandSet::new(vec![
        lrwn::MACCommand::DeviceTimeAns(lrwn::DeviceTimeAnsPayload {
            time_since_gps_epoch: match gps_time.to_std() {
                Ok(v) => v,
                Err(e) => {
                    warn!(error = %e, "To GPS time error");
                    Duration::from_secs(0)
                }
            },
        }),
    ])))
}

#[cfg(test)]
pub mod test {