1 // Copyright 2021 Ian Jackson and contributors to Hippotat
2 // SPDX-License-Identifier: GPL-3.0-or-later
3 // There is NO WARRANTY.
5 use hippotat::prelude::*;
6 use hippotat_macros::into_crlfs;
8 #[derive(StructOpt,Debug)]
14 type OutstandingRequest<'r> = Pin<Box<
15 dyn Future<Output=Option<Bytes>> + Send + 'r
18 impl<T> HCC for T where
19 T: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
20 trait HCC: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
22 struct ClientContext<'c,C> {
23 ic: &'c InstanceConfig,
24 hclient: &'c Arc<hyper::Client<C>>,
25 reporter: &'c parking_lot::Mutex<Reporter<'c>>,
29 fn submit_request<'r, 'c:'r, C:HCC>(
30 c: &'c ClientContext<C>,
32 reqs: &mut Vec<OutstandingRequest<'r>>,
35 let show_timeout = c.ic.http_timeout
36 .saturating_add(Duration::from_nanos(999_999_999))
39 let time_t = SystemTime::now()
40 .duration_since(UNIX_EPOCH)
41 .unwrap_or_else(|_| Duration::default()) // clock is being weird
43 let time_t = format!("{:x}", time_t);
44 let hmac = token_hmac(c.ic.secret.0.as_bytes(), time_t.as_bytes());
45 let mut token = time_t;
46 write!(token, " ").unwrap();
47 base64::encode_config_buf(&hmac, BASE64_CONFIG, &mut token);
49 let req_num = { *req_num += 1; *req_num };
51 let prefix1 = format!(into_crlfs!(
53 Content-Type: text/plain; charset="utf-8"
54 Content-Disposition: form-data; name="m"
62 c.ic.target_requests_outstanding,
66 let prefix2 = format!(into_crlfs!(
69 Content-Type: application/octet-stream
70 Content-Disposition: form-data; name="d"
74 let suffix = format!(into_crlfs!(
80 macro_rules! content { {
86 array::IntoIter::new([
90 if upbound.is_empty() { 1 } else { 2 }
92 Itertools::intersperse(
93 upbound.$iter().map(|u| { let out: $out = u.$into(); out }),
94 SLIP_END_SLICE.$into()
100 let body_len: usize = content!(
104 ).map(|b| b.len()).sum();
106 trace!("{} #{}: frames={} bytes={}",
107 &c.ic, req_num, upbound.len(), body_len);
109 let body = hyper::body::Body::wrap_stream(
110 futures::stream::iter(
115 ).map(Ok::<Bytes,Void>)
119 let req = hyper::Request::post(&c.ic.url)
120 .header("Content-Type", r#"multipart/form-data; boundary="b""#)
121 .header("Content-Length", body_len)
123 .context("construct request")?;
125 let resp = c.hclient.request(req);
126 let fut = Box::pin(async move {
127 let r = async { tokio::time::timeout( c.ic.http_timeout, async {
128 let resp = resp.await.context("make request")?;
129 let status = resp.status();
130 let resp = resp.into_body();
131 // xxx: some size limit to avoid mallocing the universe
132 let resp = hyper::body::to_bytes(resp).await
133 .context("HTTP error fetching response body")?;
135 if ! status.is_success() {
136 // xxx get body and log it
137 throw!(anyhow!("HTTP error status={} body={:?}",
138 &status, String::from_utf8_lossy(&resp)));
144 let r = c.reporter.lock().filter(Some(req_num), r);
147 tokio::time::sleep(c.ic.http_retry).await;
154 #[allow(unused_variables)] // xxx
155 #[allow(unused_mut)] // xxx
156 #[allow(dead_code)] // xxx
157 async fn run_client<C:HCC>(
159 hclient: Arc<hyper::Client<C>>
160 ) -> Result<Void, AE>
162 debug!("{}: config: {:?}", &ic, &ic);
164 let reporter = parking_lot::Mutex::new(Reporter::new(&ic));
166 let c = ClientContext {
172 let mut ipif = tokio::process::Command::new("sh")
173 .args(&["-c", &ic.ipif])
174 .stdin (process::Stdio::piped())
175 .stdout(process::Stdio::piped())
176 .stderr(process::Stdio::piped())
178 .spawn().context("spawn ipif")?;
180 let stderr = ipif.stderr.take().unwrap();
181 let ic_name = ic.to_string();
182 let _ = task::spawn(async move {
183 let mut stderr = tokio::io::BufReader::new(stderr).lines();
184 while let Some(l) = stderr.next_line().await? {
185 error!("{}: ipif stderr: {}", &ic_name, l.trim_end());
187 Ok::<_,io::Error>(())
190 let mut req_num: ReqNum = 0;
192 let tx_stream = ipif.stdout.take().unwrap();
193 let mut rx_stream = ipif.stdin .take().unwrap();
195 let mut tx_stream = tokio::io::BufReader::new(tx_stream).split(SLIP_END);
196 let mut packets: VecDeque<Box<[u8]>> = default();
197 let mut upbound = Frames::default();
199 let mut reqs: Vec<OutstandingRequest>
200 = Vec::with_capacity(ic.max_requests_outstanding.sat());
202 let mut rx_queue: FrameQueue = default();
204 // xxx check that ic settings are all honoured
209 y = rx_stream.write_all_buf(&mut rx_queue),
210 if ! rx_queue.is_empty() =>
212 let () = y.context("write rx data to ipif")?;
215 data = tx_stream.next_segment(),
216 if packets.is_empty() =>
219 data.context("read from ipif")?
220 .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
221 //eprintln!("data={:?}", DumpHex(&data));
223 match check1(Slip2Mime, ic.mtu, &data, |header| {
224 let addr = ip_packet_addr::<false>(header)?;
225 if addr != ic.link.client.0 { throw!(PE::Src(addr)) }
228 Ok(packet) => packets.push_back(packet),
229 Err(PE::Empty) => { },
230 Err(e@ PE::Src(_)) => debug!("{}: tx discarding: {}", &ic, e),
231 Err(e) => error!("{}: tx discarding: {}", &ic, e),
236 if ! upbound.tried_full() &&
237 ! packets.is_empty() =>
239 while let Some(packet) = packets.pop_front() {
240 match upbound.add(ic.max_batch_up, packet.into()/*xxx*/) {
241 Err(packet) => { packets.push_front(packet.into()/*xxx*/); break; }
248 if reporter.lock().filter(None, {
249 if rx_queue.remaining() < ic.max_batch_down.sat() * 3 /* xxx */ {
250 // xxx make this separate option ? docs say server only
253 Err(anyhow!("rx queue full"))
256 (reqs.len() < ic.target_requests_outstanding.sat() ||
257 (reqs.len() < ic.max_requests_outstanding.sat() &&
258 ! upbound.is_empty()))
259 // xxx backpressure, if too much in rx_queue
262 submit_request(&c, &mut req_num, &mut reqs,
263 mem::take(&mut upbound).into())?;
266 (got, goti, _) = async { future::select_all(&mut reqs).await },
267 if ! reqs.is_empty() =>
269 reqs.swap_remove(goti);
271 if let Some(got) = got {
272 reporter.lock().success();
273 //eprintln!("got={:?}", DumpHex(&got));
274 checkn(SlipNoConv,ic.mtu, &got, &mut rx_queue, |header| {
275 let addr = ip_packet_addr::<true>(header)?;
276 if addr != ic.link.client.0 { throw!(PE::Dst(addr)) }
278 }, |e| error!("{} #{}: rx discarding: {}", &ic, req_num, e));
288 async fn main() -> Result<(), AE> {
289 let opts = Opts::from_args();
291 let ics = config::read(&opts.config, LinkEnd::Client)?;
292 if ics.is_empty() { throw!(anyhow!("no associations with server(s)")); }
296 let https = HttpsConnector::new();
297 let hclient = hyper::Client::builder().build::<_, hyper::Body>(https);
298 let hclient = Arc::new(hclient);
301 let () = future::select_all(
302 ics.into_iter().map(|ic| Box::pin(async {
303 let assocname = ic.to_string();
304 info!("{} starting", &assocname);
305 let hclient = hclient.clone();
306 let join = task::spawn(async {
307 run_client(ic, hclient).await.void_unwrap_err()
311 error!("{} failed: {:?}", &assocname, e);
314 error!("{} panicked!", &assocname);
315 panic::resume_unwind(je.into_panic());
321 error!("quitting because one of your client connections crashed");