server/slocal.rs

   1 // Copyright 2021 Ian Jackson and contributors to Hippotat
   2 // SPDX-License-Identifier: GPL-3.0-or-later
   3 // There is NO WARRANTY.
   4
   5 use super::*;
   6
   7 #[allow(dead_code)] // xxx
   8 #[allow(unused_variables)] // xxx
   9 pub async fn run(global: Arc<Global>,
  10                  rx: mpsc::Receiver<RoutedPacket>,
  11                  mut ipif: Ipif) -> Result<Void,AE> {
  12   let r = async {
  13     let mut goodness: i32 = 0;
  14     const GOODNESS_SHIFT: u8 = 8;
  15     const GOODNESS_MIN: i32 = -16;
  16
  17     loop {
  18       select!{
  19         biased;
  20
  21         // xxx something something rx something
  22
  23         data = Ipif::next_frame(&mut ipif.tx) =>
  24         {
  25           let data = data?;
  26           let may_route = MayRoute::came_from_outside_hippotatd();
  27
  28           goodness -= goodness >> GOODNESS_SHIFT;
  29
  30           match checkn(SlipNoConv, global.config.mtu, &data, |header|{
  31             let saddr = ip_packet_addr::<false>(header)?;
  32             let daddr = ip_packet_addr::<true>(header)?;
  33             if ! global.config.vnetwork.iter().any(|n| n.contains(&saddr)) {
  34               throw!(PE::Src(saddr))
  35             }
  36             Ok(daddr)
  37           }, |(data, daddr)| route_packet(
  38             &global, "ipif", None,
  39             data, daddr, may_route.clone()
  40           ).map(Ok), |pe| Ok(match pe {
  41             PE::Empty => { },
  42             PE::Src(saddr) => trace!(
  43               target: "hippotatd",
  44               "ipif local discard outside-vnets saddr={:?}",
  45               saddr
  46             ),
  47             other => throw!(other),
  48           })).await {
  49             Ok(()) => goodness += 1,
  50             Err(e) => {
  51               goodness -= 1;
  52               error!("[good={}] invalid data from local tx ipif {}",
  53                      goodness, e);
  54               if goodness < GOODNESS_MIN {
  55                 throw!(anyhow!("too many bad packets, too few good ones!"))
  56               }
  57             },
  58           }
  59         }
  60       }
  61     }
  62   }.await;
  63
  64   ipif.quitting(None).await;
  65   r
  66 }