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)]
10 /// Increase debug level
11 #[structopt(long, short="D", parse(from_occurrences))]
18 type OutstandingRequest<'r> = Pin<Box<
19 dyn Future<Output=Option<Bytes>> + Send + 'r
22 impl<T> HCC for T where
23 T: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
24 trait HCC: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
26 struct ClientContext<'c,C> {
27 ic: &'c InstanceConfig,
28 effective_http_timeout: Duration,
29 hclient: &'c Arc<hyper::Client<C>>,
30 reporter: &'c parking_lot::Mutex<Reporter<'c>>,
34 fn submit_request<'r, 'c:'r, C:HCC>(
35 c: &'c ClientContext<C>,
37 reqs: &mut Vec<OutstandingRequest<'r>>,
40 let show_timeout = c.ic.http_timeout
41 .saturating_add(Duration::from_nanos(999_999_999))
44 let time_t = SystemTime::now()
45 .duration_since(UNIX_EPOCH)
46 .unwrap_or_else(|_| Duration::default()) // clock is being weird
48 let time_t = format!("{:x}", time_t);
49 let hmac = token_hmac(c.ic.secret.0.as_bytes(), time_t.as_bytes());
50 let mut token = time_t;
51 write!(token, " ").unwrap();
52 base64::encode_config_buf(&hmac, BASE64_CONFIG, &mut token);
54 let req_num = { *req_num += 1; *req_num };
56 let prefix1 = format!(into_crlfs!(
58 Content-Type: text/plain; charset="utf-8"
59 Content-Disposition: form-data; name="m"
68 c.ic.target_requests_outstanding,
73 let prefix2 = format!(into_crlfs!(
76 Content-Type: application/octet-stream
77 Content-Disposition: form-data; name="d"
81 let suffix = format!(into_crlfs!(
87 macro_rules! content { {
93 array::IntoIter::new([
97 if upbound.is_empty() { 1 } else { 2 }
99 Itertools::intersperse(
100 upbound.$iter().map(|u| { let out: $out = u.$into(); out }),
101 SLIP_END_SLICE.$into()
107 let body_len: usize = content!(
111 ).map(|b| b.len()).sum();
113 trace!("{} #{}: frames={} bytes={}",
114 &c.ic, req_num, upbound.len(), body_len);
116 let body = hyper::body::Body::wrap_stream(
117 futures::stream::iter(
122 ).map(Ok::<Bytes,Void>)
126 let req = hyper::Request::post(&c.ic.url)
127 .header("Content-Type", r#"multipart/form-data; boundary="b""#)
128 .header("Content-Length", body_len)
130 .context("construct request")?;
132 let resp = c.hclient.request(req);
133 let fut = Box::pin(async move {
134 let r = async { tokio::time::timeout( c.effective_http_timeout, async {
135 let resp = resp.await.context("make request")?;
136 let status = resp.status();
137 let resp = resp.into_body();
138 // xxx: some size limit to avoid mallocing the universe
139 let resp = hyper::body::to_bytes(resp).await
140 .context("HTTP error fetching response body")?;
142 if ! status.is_success() {
143 throw!(anyhow!("HTTP error status={} body={:?}",
144 &status, String::from_utf8_lossy(&resp)));
150 let r = c.reporter.lock().filter(Some(req_num), r);
153 tokio::time::sleep(c.ic.http_retry).await;
160 async fn run_client<C:HCC>(
162 hclient: Arc<hyper::Client<C>>
163 ) -> Result<Void, AE>
165 debug!("{}: config: {:?}", &ic, &ic);
167 let reporter = parking_lot::Mutex::new(Reporter::new(&ic));
169 let c = ClientContext {
173 effective_http_timeout: ic.http_timeout.checked_add(ic.http_timeout_grace)
174 .ok_or_else(|| anyhow!("calculate effective http timeout ({:?} + {:?})",
175 ic.http_timeout, ic.http_timeout_grace))?,
178 let mut ipif = tokio::process::Command::new("sh")
179 .args(&["-c", &ic.ipif])
180 .stdin (process::Stdio::piped())
181 .stdout(process::Stdio::piped())
182 .stderr(process::Stdio::piped())
184 .spawn().context("spawn ipif")?;
186 let stderr = ipif.stderr.take().unwrap();
187 let ic_name = ic.to_string();
188 let _ = task::spawn(async move {
189 let mut stderr = tokio::io::BufReader::new(stderr).lines();
190 while let Some(l) = stderr.next_line().await? {
191 error!("{}: ipif stderr: {}", &ic_name, l.trim_end());
193 Ok::<_,io::Error>(())
196 let mut req_num: ReqNum = 0;
198 let tx_stream = ipif.stdout.take().unwrap();
199 let mut rx_stream = ipif.stdin .take().unwrap();
201 let mut tx_stream = tokio::io::BufReader::new(tx_stream).split(SLIP_END);
202 let mut packets: VecDeque<Box<[u8]>> = default();
203 let mut upbound = Frames::default();
205 let mut reqs: Vec<OutstandingRequest>
206 = Vec::with_capacity(ic.max_requests_outstanding.sat());
208 let mut rx_queue: FrameQueue = default();
210 // xxx check that ic settings are all honoured
215 y = rx_stream.write_all_buf(&mut rx_queue),
216 if ! rx_queue.is_empty() =>
218 let () = y.context("write rx data to ipif")?;
221 data = tx_stream.next_segment(),
222 if packets.is_empty() =>
225 data.context("read from ipif")?
226 .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
227 //eprintln!("data={:?}", DumpHex(&data));
229 match check1(Slip2Mime, ic.mtu, &data, |header| {
230 let addr = ip_packet_addr::<false>(header)?;
231 if addr != ic.link.client.0 { throw!(PE::Src(addr)) }
234 Ok(packet) => packets.push_back(packet),
235 Err(PE::Empty) => { },
236 Err(e@ PE::Src(_)) => debug!("{}: tx discarding: {}", &ic, e),
237 Err(e) => error!("{}: tx discarding: {}", &ic, e),
242 if ! upbound.tried_full() &&
243 ! packets.is_empty() =>
245 while let Some(packet) = packets.pop_front() {
246 match upbound.add(ic.max_batch_up, packet.into()/*xxx*/) {
247 Err(packet) => { packets.push_front(packet.into()/*xxx*/); break; }
254 if reporter.lock().filter(None, {
255 if rx_queue.remaining() < ic.max_batch_down.sat() * 3 /* xxx */ {
256 // xxx make this separate option ? docs say server only
259 Err(anyhow!("rx queue full"))
262 (reqs.len() < ic.target_requests_outstanding.sat() ||
263 (reqs.len() < ic.max_requests_outstanding.sat() &&
264 ! upbound.is_empty()))
267 submit_request(&c, &mut req_num, &mut reqs,
268 mem::take(&mut upbound).into())?;
271 (got, goti, _) = async { future::select_all(&mut reqs).await },
272 if ! reqs.is_empty() =>
274 reqs.swap_remove(goti);
276 if let Some(got) = got {
277 reporter.lock().success();
278 //eprintln!("got={:?}", DumpHex(&got));
279 checkn(SlipNoConv,ic.mtu, &got, &mut rx_queue, |header| {
280 let addr = ip_packet_addr::<true>(header)?;
281 if addr != ic.link.client.0 { throw!(PE::Dst(addr)) }
283 }, |e| error!("{} #{}: rx discarding: {}", &ic, req_num, e));
293 async fn main() -> Result<(), AE> {
294 let opts = Opts::from_args();
296 let ics = config::read(&opts.config, LinkEnd::Client)?;
297 if ics.is_empty() { throw!(anyhow!("no associations with server(s)")); }
300 let env = env_logger::Env::new()
301 .filter("HIPPOTAT_LOG")
302 .write_style("HIPPOTAT_LOG_STYLE");
304 let mut logb = env_logger::Builder::new();
305 logb.filter(Some("hippotat"),
306 *[ log::LevelFilter::Info,
307 log::LevelFilter::Debug ]
310 &log::LevelFilter::Trace
316 let https = HttpsConnector::new();
317 let hclient = hyper::Client::builder().build::<_, hyper::Body>(https);
318 let hclient = Arc::new(hclient);
321 let () = future::select_all(
322 ics.into_iter().map(|ic| Box::pin(async {
323 let assocname = ic.to_string();
324 info!("{} starting", &assocname);
325 let hclient = hclient.clone();
326 let join = task::spawn(async {
327 run_client(ic, hclient).await.void_unwrap_err()
331 error!("{} failed: {:?}", &assocname, e);
334 error!("{} panicked!", &assocname);
335 panic::resume_unwind(je.into_panic());
341 error!("quitting because one of your client connections crashed");