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());
46 // xxx check that ic settings are all honoured
51 packet = tx_stream.next_segment(),
52 if tx_defer.is_none() &&
53 reqs.len() < ic.max_requests_outstanding.sat() =>
55 let mut upbound_total = 0;
56 let mut upbound = vec![];
57 let mut to_process: Option<Result<Option<Vec<u8>>,_>>
59 while let Some(packet) = to_process.take() {
61 packet.context("read from ipif")?
62 .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
63 if let Ok(()) = slip::check_checkmtu_mimeify(&mut packet, &ic) {
64 let new_upbound_total = packet.len() + upbound_total + 1;
65 if new_upbound_total > ic.max_batch_up.sat() {
66 tx_defer = Some(packet);
69 upbound_total = new_upbound_total;
71 // we rely on `next_segment` being cancellation-safe,
72 // which isn't documented as true but seems reasonably safe
73 pin!{ let next_segment = tx_stream.next_segment(); }
74 to_process = match poll!(next_segment) {
75 Poll::Ready(p) => Some(p),
76 Poll::Pending => None,
80 assert!( to_process.is_none() );
81 dbg!(&reqs.len(), &upbound_total, &upbound.len());
83 let req = hyper::Request::post(&ic.url)
85 Itertools::intersperse(
86 upbound.into_iter().map(|u| Cow::from(u)),
87 Cow::from(&[SLIP_END] as &'static [u8])
89 ).context("construct request")?;
91 let resp = hclient.request(req);
92 let fut = Box::pin(tokio::timeout(
96 let resp = resp.await;
97 if ! resp.status().is_success() {
98 throw!("HTTP error status {}: {}", &resp.status());
100 let resp = resp.into_body();
101 // xxx: some size limit to avoid mallocing the universe
102 let resp = resp.aggregate().await
103 .context("HTTP error fetching response body")?;
107 tokio::time::sleep(&ic.http_retry).await;
115 (got, goti, _) = future::select_all(&mut reqs)
117 reqs.swap_remove(goti);
118 if let Some(got) = reporter.report(got) {
119 dbg!(got.len()); // xxx
128 async fn main() -> Result<(), AE> {
129 let ics = config::read(LinkEnd::Client)?;
130 if ics.is_empty() { throw!(anyhow!("no associations with server(s)")); }
134 let https = HttpsConnector::new();
135 let hclient = hyper::Client::builder().build::<_, hyper::Body>(https);
136 let hclient = Arc::new(hclient);
139 let () = future::select_all(
140 ics.into_iter().map(|ic| Box::pin(async {
141 let assocname = ic.to_string();
142 info!("{} starting", &assocname);
143 let hclient = hclient.clone();
144 let join = task::spawn(async {
145 run_client(ic, hclient).await.void_unwrap_err()
149 error!("{} failed: {:?}", &assocname, e);
152 error!("{} panicked!", &assocname);
153 panic::resume_unwind(je.into_panic());
159 error!("quitting because one of your client connections crashed");