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>>)
17 where C: hyper::client::connect::Connect + Clone + Send + Sync + 'static,
19 debug!("{}: config: {:?}", &ic, &ic);
21 let mut reporter = Reporter { };
23 let mut ipif = tokio::process::Command::new("sh")
24 .args(&["-c", &ic.ipif])
25 .stdin (process::Stdio::piped())
26 .stdout(process::Stdio::piped())
27 .stderr(process::Stdio::piped())
29 .spawn().context("spawn ipif")?;
31 let stderr = ipif.stderr.take().unwrap();
32 let ic_name = ic.to_string();
33 let _ = task::spawn(async move {
34 let mut stderr = tokio::io::BufReader::new(stderr).lines();
35 while let Some(l) = stderr.next_line().await? {
36 error!("{}: ipif stderr: {}", &ic_name, l.trim_end());
41 let tx_stream = ipif.stdout.take().unwrap();
42 let mut tx_stream = tokio::io::BufReader::new(tx_stream).split(SLIP_ESC);
43 let mut tx_defer = None;
45 let stream_for_rx = ipif.stdin .take().unwrap();
47 let mut reqs = Vec::with_capacity(ic.max_requests_outstanding.sat());
49 // xxx check that ic settings are all honoured
54 packet = tx_stream.next_segment(),
55 if tx_defer.is_none() &&
56 reqs.len() < ic.max_requests_outstanding.sat() =>
58 let mut upbound_total = 0;
59 let mut upbound: Vec<Vec<u8>> = vec![];
60 let mut to_process: Option<Result<Option<Vec<u8>>,_>>
62 while let Some(packet) = to_process.take() {
64 packet.context("read from ipif")?
65 .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
66 if let Ok(()) = slip::check_checkmtu_mimeify(&mut packet, &ic) {
67 let new_upbound_total = packet.len() + upbound_total + 1;
68 if new_upbound_total > ic.max_batch_up.sat() {
69 tx_defer = Some(packet);
72 upbound_total = new_upbound_total;
74 // we rely oin `next_segment` being cancellation-safe,
75 // which isn't documented as true but seems reasonably safe
76 pin!{ let next_segment = tx_stream.next_segment(); }
77 to_process = match poll!(next_segment) {
78 Poll::Ready(p) => Some(p),
79 Poll::Pending => None,
83 assert!( to_process.is_none() );
84 dbg!(&reqs.len(), &upbound_total, &upbound.len());
86 //: impl futures::Stream<Cow<&[u8]>>
87 let body = hyper::body::Body::wrap_stream(
88 futures::stream::iter(
89 Itertools::intersperse(
90 upbound.into_iter().map(|u| Bytes::from(u)),
91 slip::SLIP_END_SLICE.into()
96 let req = hyper::Request::post(&ic.url).body(body)
97 .context("construct request")?;
99 let resp = hclient.request(req);
100 let fut = Box::pin(async {
101 let r = async { tokio::time::timeout( ic.http_timeout, async {
102 let resp = resp.await.context("make request")?;
103 if ! resp.status().is_success() {
104 throw!(anyhow!("HTTP error status {}", &resp.status()));
106 let resp = resp.into_body();
107 // xxx: some size limit to avoid mallocing the universe
108 let resp = hyper::body::aggregate(resp).await
109 .context("HTTP error fetching response body")?;
113 tokio::time::sleep(ic.http_retry).await;
120 (got, goti, _) = future::select_all(&mut reqs) =>
122 reqs.swap_remove(goti);
123 if let Some(got) = reporter.report(got) {
124 dbg!(&got.remaining()); // xxx
133 async fn main() -> Result<(), AE> {
134 let ics = config::read(LinkEnd::Client)?;
135 if ics.is_empty() { throw!(anyhow!("no associations with server(s)")); }
139 let https = HttpsConnector::new();
140 let hclient = hyper::Client::builder().build::<_, hyper::Body>(https);
141 let hclient = Arc::new(hclient);
144 let () = future::select_all(
145 ics.into_iter().map(|ic| Box::pin(async {
146 let assocname = ic.to_string();
147 info!("{} starting", &assocname);
148 let hclient = hclient.clone();
149 let join = task::spawn(async {
150 run_client(ic, hclient).await.void_unwrap_err()
154 error!("{} failed: {:?}", &assocname, e);
157 error!("{} panicked!", &assocname);
158 panic::resume_unwind(je.into_panic());
164 error!("quitting because one of your client connections crashed");