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::*;
6 use hippotat_macros::into_crlfs;
8 type OutstandingRequest<'r> = Pin<Box<
9 dyn Future<Output=Option<Bytes>> + Send + 'r
12 impl<T> HCC for T where
13 T: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
14 trait HCC: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
16 struct ClientContext<'c,C> {
17 ic: &'c InstanceConfig,
18 hclient: &'c Arc<hyper::Client<C>>,
19 reporter: &'c parking_lot::Mutex<Reporter<'c>>,
23 fn submit_request<'r, 'c:'r, C:HCC>(
24 c: &'c ClientContext<C>,
25 reqs: &mut Vec<OutstandingRequest<'r>>,
28 let show_timeout = c.ic.http_timeout
29 .saturating_add(Duration::from_nanos(999_999_999))
32 let time_t = SystemTime::now()
33 .duration_since(UNIX_EPOCH)
34 .unwrap_or_else(|_| Duration::default()) // clock is being weird
36 let time_t = format!("{:x}", time_t);
37 let hmac = token_hmac(c.ic.secret.0.as_bytes(), time_t.as_bytes());
38 let mut token = time_t;
39 write!(token, " ").unwrap();
40 base64::encode_config_buf(&hmac, BASE64_CONFIG, &mut token);
42 let prefix1 = format!(into_crlfs!(
44 Content-Type: text/plain; charset="utf-8"
45 Content-Disposition: form-data; name="m"
53 c.ic.target_requests_outstanding,
57 let prefix2 = format!(into_crlfs!(
60 Content-Type: application/octet-stream
61 Content-Disposition: form-data; name="d"
65 let suffix = format!(into_crlfs!(
71 macro_rules! content { {
77 array::IntoIter::new([
81 if upbound.is_empty() { 1 } else { 2 }
83 Itertools::intersperse(
84 upbound.$iter().map(|u| { let out: $out = u.$into(); out }),
85 SLIP_END_SLICE.$into()
91 let body_len: usize = content!(
95 ).map(|b| b.len()).sum();
97 let body = hyper::body::Body::wrap_stream(
98 futures::stream::iter(
103 ).map(Ok::<Bytes,Void>)
107 let req = hyper::Request::post(&c.ic.url)
108 .header("Content-Type", r#"multipart/form-data; boundary="b""#)
109 .header("Content-Length", body_len)
111 .context("construct request")?;
113 let resp = c.hclient.request(req);
114 let fut = Box::pin(async move {
115 let r = async { tokio::time::timeout( c.ic.http_timeout, async {
116 let resp = resp.await.context("make request")?;
117 let status = resp.status();
118 let resp = resp.into_body();
119 // xxx: some size limit to avoid mallocing the universe
120 let resp = hyper::body::to_bytes(resp).await
121 .context("HTTP error fetching response body")?;
123 if ! status.is_success() {
124 // xxx get body and log it
125 throw!(anyhow!("HTTP error status={} body={:?}",
126 &status, String::from_utf8_lossy(&resp)));
132 let r = c.reporter.lock().report(r);
135 tokio::time::sleep(c.ic.http_retry).await;
142 #[allow(unused_variables)] // xxx
143 async fn run_client<C:HCC>(
145 hclient: Arc<hyper::Client<C>>
146 ) -> Result<Void, AE>
148 debug!("{}: config: {:?}", &ic, &ic);
150 let reporter = parking_lot::Mutex::new(Reporter::new(&ic));
152 let c = ClientContext {
158 let mut ipif = tokio::process::Command::new("sh")
159 .args(&["-c", &ic.ipif])
160 .stdin (process::Stdio::piped())
161 .stdout(process::Stdio::piped())
162 .stderr(process::Stdio::piped())
164 .spawn().context("spawn ipif")?;
166 let stderr = ipif.stderr.take().unwrap();
167 let ic_name = ic.to_string();
168 let _ = task::spawn(async move {
169 let mut stderr = tokio::io::BufReader::new(stderr).lines();
170 while let Some(l) = stderr.next_line().await? {
171 error!("{}: ipif stderr: {}", &ic_name, l.trim_end());
173 Ok::<_,io::Error>(())
176 let tx_stream = ipif.stdout.take().unwrap();
177 let mut tx_stream = tokio::io::BufReader::new(tx_stream).split(SLIP_END);
178 let mut packets: VecDeque<Box<[u8]>> = default();
179 let mut upbound = Frames::default();
181 let stream_for_rx = ipif.stdin .take().unwrap();
183 let mut reqs: Vec<OutstandingRequest>
184 = Vec::with_capacity(ic.max_requests_outstanding.sat());
186 // xxx check that ic settings are all honoured
191 data = tx_stream.next_segment(),
192 if packets.is_empty() =>
195 data.context("read from ipif")?
196 .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
197 // eprintln!("packet={:x?}", &packet);
200 ::<_, true>(ic.mtu, &data, |e| match e {
201 e => error!("PACKET ERROR {}", e), // xxx
206 if ! upbound.tried_full() &&
207 ! packets.is_empty() =>
209 while let Some(packet) = packets.pop_front() {
210 match upbound.add(ic.max_batch_up, packet.into()/*xxx*/) {
211 Err(packet) => { packets.push_front(packet.into()/*xxx*/); break; }
218 if reqs.len() < ic.target_requests_outstanding.sat() ||
219 (reqs.len() < ic.max_requests_outstanding.sat() &&
220 ! upbound.is_empty()) =>
222 submit_request(&c, &mut reqs, mem::take(&mut upbound).into())?;
225 (got, goti, _) = async { future::select_all(&mut reqs).await },
226 if ! reqs.is_empty() =>
228 reqs.swap_remove(goti);
229 if let Some(got) = got {
230 dbg!(&got.remaining()); // xxx
239 async fn main() -> Result<(), AE> {
240 let ics = config::read(LinkEnd::Client)?;
241 if ics.is_empty() { throw!(anyhow!("no associations with server(s)")); }
245 let https = HttpsConnector::new();
246 let hclient = hyper::Client::builder().build::<_, hyper::Body>(https);
247 let hclient = Arc::new(hclient);
250 let () = future::select_all(
251 ics.into_iter().map(|ic| Box::pin(async {
252 let assocname = ic.to_string();
253 info!("{} starting", &assocname);
254 let hclient = hclient.clone();
255 let join = task::spawn(async {
256 run_client(ic, hclient).await.void_unwrap_err()
260 error!("{} failed: {:?}", &assocname, e);
263 error!("{} panicked!", &assocname);
264 panic::resume_unwind(je.into_panic());
270 error!("quitting because one of your client connections crashed");