| 9 | use lrwn::region::Channel; |
| 10 | |
| 11 | pub fn request( |
| 12 | max_channels: usize, |
| 13 | current_channels: &HashMap<usize, Channel>, |
| 14 | wanted_channels: &HashMap<usize, Channel>, |
| 15 | region_conf: Arc<Box<dyn lrwn::region::Region + Send + Sync>>, |
| 16 | ) -> Result<Option<lrwn::MACCommandSet>> { |
| 17 | let mut out: Vec<lrwn::MACCommand> = Vec::new(); |
| 18 | |
| 19 | let mut wanted_channel_numbers: Vec<usize> = wanted_channels.keys().cloned().collect(); |
| 20 | wanted_channel_numbers.sort_unstable(); |
| 21 | |
| 22 | for i in &wanted_channel_numbers { |
| 23 | let wanted = wanted_channels.get(i).unwrap(); // we already know the key is in the map |
| 24 | let (min_dr, max_dr) = region_conf.get_new_channel_req_dr_range(&wanted.data_rates)?; |
| 25 | |
| 26 | match current_channels.get(i) { |
| 27 | Some(current) => { |
| 28 | // Channel needs to be updated. |
| 29 | if current.frequency != wanted.frequency || current.data_rates != wanted.data_rates |
| 30 | { |
| 31 | out.push(lrwn::MACCommand::NewChannelReq( |
| 32 | lrwn::NewChannelReqPayload { |
| 33 | ch_index: *i as u8, |
| 34 | freq: wanted.frequency, |
| 35 | min_dr, |
| 36 | max_dr, |
| 37 | }, |
| 38 | )); |
| 39 | } |
| 40 | } |
| 41 | None => { |
| 42 | // Channel needs to be added. |
| 43 | out.push(lrwn::MACCommand::NewChannelReq( |
| 44 | lrwn::NewChannelReqPayload { |
| 45 | ch_index: *i as u8, |
| 46 | freq: wanted.frequency, |
| 47 | min_dr, |
| 48 | max_dr, |
| 49 | }, |
| 50 | )); |
| 51 | } |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | if out.len() > max_channels { |
| 56 | out.drain(max_channels..); |
| 57 | } |
| 58 | |
| 59 | if out.is_empty() { |
| 60 | return Ok(None); |
| 61 | } |
| 62 | |
| 63 | Ok(Some(lrwn::MACCommandSet::new(out))) |
| 64 | } |
| 65 | |
| 66 | pub fn handle( |
| 67 | dev: &mut device::Device, |