1 // Copyright 2021 Ian Jackson and contributors to Hippotat
2 // SPDX-License-Identifier: AGPL-3.0-or-later
3 // There is NO WARRANTY.
5 use hippotat::prelude::*;
9 requests_outstanding: Vec<>,
10 tx_read_stream: something,
11 rx_write_stream: something,
14 #[allow(unused_variables)] // xxx
15 async fn run_client<C>(ic: InstanceConfig, hclient: Arc<hyper::Client<C>>)
18 debug!("{}: config: {:?}", &ic, &ic);
20 let mut ipif = tokio::process::Command::new("sh")
21 .args(&["-c", &ic.ipif])
22 .stdin (process::Stdio::piped())
23 .stdout(process::Stdio::piped())
24 .stderr(process::Stdio::piped())
26 .spawn().context("spawn ipif")?;
28 let stderr = ipif.stderr.take().unwrap();
29 let ic_name = ic.to_string();
30 let _ = task::spawn(async move {
31 let mut stderr = tokio::io::BufReader::new(stderr).lines();
32 while let Some(l) = stderr.next_line().await? {
33 error!("{}: ipif stderr: {}", &ic_name, l.trim_end());
38 let tx_stream = ipif.stdout.take().unwrap();
39 let mut tx_stream = tokio::io::BufReader::new(tx_stream).split(SLIP_ESC);
40 let mut tx_defer = None;
42 let stream_for_rx = ipif.stdin .take().unwrap();
44 let mut reqs = Vec::with_capacity(ic.max_requests_outstanding.sat());
49 packet = tx_stream.next_segment(),
50 if tx_defer.is_none() &&
51 reqs.len() < ic.max_requests_outstanding.sat() =>
53 let mut upbound_total = 0;
54 let mut upbound = vec![];
55 let mut to_process: Option<Result<Option<Vec<u8>>,_>>
57 while let Some(packet) = to_process.take() {
59 packet.context("read from ipif")?
60 .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
61 if let Ok(()) = slip::check_checkmtu_mimeify(&mut packet, &ic) {
62 let new_upbound_total = packet.len() + upbound_total + 1;
63 if new_upbound_total > ic.max_batch_up.sat() {
64 tx_defer = Some(packet);
67 upbound_total = new_upbound_total;
69 // we rely on `next_segment` being cancellation-safe,
70 // which isn't documented as true but seems reasonably safe
71 pin!{ let next_segment = tx_stream.next_segment(); }
72 to_process = match poll!(next_segment) {
73 Poll::Ready(p) => Some(p),
74 Poll::Pending => None,
78 assert!( to_process.is_none() );
79 dbg!(&reqs.len(), &upbound_total, &upbound.len());
81 let req = hyper::Request::post(&ic.url)
83 Itertools::intersperse(
84 upbound.into_iter().map(|u| Cow::from(u)),
85 Cow::from(&[SLIP_END] as &'static [u8])
87 ).context("construct request")?;
96 made out of futures::stream::iter
105 // xxx make new request
113 async fn main() -> Result<(), AE> {
114 let ics = config::read(LinkEnd::Client)?;
115 if ics.is_empty() { throw!(anyhow!("no associations with server(s)")); }
119 let https = HttpsConnector::new();
120 let hclient = hyper::Client::builder().build::<_, hyper::Body>(https);
121 let hclient = Arc::new(hclient);
124 let () = future::select_all(
125 ics.into_iter().map(|ic| Box::pin(async {
126 let assocname = ic.to_string();
127 info!("{} starting", &assocname);
128 let hclient = hclient.clone();
129 let join = task::spawn(async {
130 run_client(ic, hclient).await.void_unwrap_err()
134 error!("{} failed: {:?}", &assocname, e);
137 error!("{} panicked!", &assocname);
138 panic::resume_unwind(je.into_panic());
144 error!("quitting because one of your client connections crashed");