// Copyright 2021 Ian Jackson and contributors to Hippotat
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: GPL-3.0-or-later
// There is NO WARRANTY.
use hippotat::prelude::*;
+use hippotat_macros::into_crlfs;
-/*
-struct Client {
- requests_outstanding: Vec<>,
- tx_read_stream: something,
- rx_write_stream: something,
-}*/
+#[derive(StructOpt,Debug)]
+pub struct Opts {
+ /// Increase debug level
+ #[structopt(long, short="D", parse(from_occurrences))]
+ debug: usize,
-#[allow(unused_variables)] // xxx
-async fn run_client<C>(ic: InstanceConfig, hclient: Arc<hyper::Client<C>>)
- -> Result<Void, AE>
+ #[structopt(flatten)]
+ config: config::Opts,
+}
+
+type OutstandingRequest<'r> = Pin<Box<
+ dyn Future<Output=Option<Bytes>> + Send + 'r
+ >>;
+
+impl<T> HCC for T where
+ T: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
+trait HCC: hyper::client::connect::Connect + Clone + Send + Sync + 'static { }
+
+struct ClientContext<'c,C> {
+ ic: &'c InstanceConfig,
+ effective_http_timeout: Duration,
+ hclient: &'c Arc<hyper::Client<C>>,
+ reporter: &'c parking_lot::Mutex<Reporter<'c>>,
+}
+
+#[throws(AE)]
+fn submit_request<'r, 'c:'r, C:HCC>(
+ c: &'c ClientContext<C>,
+ req_num: &mut ReqNum,
+ reqs: &mut Vec<OutstandingRequest<'r>>,
+ upbound: FramesData,
+) {
+ let show_timeout = c.ic.http_timeout
+ .saturating_add(Duration::from_nanos(999_999_999))
+ .as_secs();
+
+ let time_t = SystemTime::now()
+ .duration_since(UNIX_EPOCH)
+ .unwrap_or_else(|_| Duration::default()) // clock is being weird
+ .as_secs();
+ let time_t = format!("{:x}", time_t);
+ let hmac = token_hmac(c.ic.secret.0.as_bytes(), time_t.as_bytes());
+ let mut token = time_t;
+ write!(token, " ").unwrap();
+ base64::encode_config_buf(&hmac, BASE64_CONFIG, &mut token);
+
+ let req_num = { *req_num += 1; *req_num };
+
+ let prefix1 = format!(into_crlfs!(
+ r#"--b
+ Content-Type: text/plain; charset="utf-8"
+ Content-Disposition: form-data; name="m"
+
+ {}
+ {}
+ {}
+ {}
+ {}"#),
+ &c.ic.link.client,
+ token,
+ c.ic.target_requests_outstanding,
+ show_timeout,
+ c.ic.max_batch_down,
+ );
+
+ let prefix2 = format!(into_crlfs!(
+ r#"
+ --b
+ Content-Type: application/octet-stream
+ Content-Disposition: form-data; name="d"
+
+ "#),
+ );
+ let suffix = format!(into_crlfs!(
+ r#"
+ --b--
+ "#),
+ );
+
+ macro_rules! content { {
+ $out:ty,
+ $iter:ident,
+ $into:ident,
+ } => {
+ itertools::chain![
+ array::IntoIter::new([
+ prefix1.$into(),
+ prefix2.$into(),
+ ]).take(
+ if upbound.is_empty() { 1 } else { 2 }
+ ),
+ Itertools::intersperse(
+ upbound.$iter().map(|u| { let out: $out = u.$into(); out }),
+ SLIP_END_SLICE.$into()
+ ),
+ [ suffix.$into() ],
+ ]
+ }}
+
+ let body_len: usize = content!(
+ &[u8],
+ iter,
+ as_ref,
+ ).map(|b| b.len()).sum();
+
+ trace!("{} #{}: frames={} bytes={}",
+ &c.ic, req_num, upbound.len(), body_len);
+
+ let body = hyper::body::Body::wrap_stream(
+ futures::stream::iter(
+ content!(
+ Bytes,
+ into_iter,
+ into,
+ ).map(Ok::<Bytes,Void>)
+ )
+ );
+
+ let req = hyper::Request::post(&c.ic.url)
+ .header("Content-Type", r#"multipart/form-data; boundary="b""#)
+ .header("Content-Length", body_len)
+ .body(body)
+ .context("construct request")?;
+
+ let resp = c.hclient.request(req);
+ let fut = Box::pin(async move {
+ let r = async { tokio::time::timeout( c.effective_http_timeout, async {
+ let resp = resp.await.context("make request")?;
+ let status = resp.status();
+ let resp = resp.into_body();
+ // xxx: some size limit to avoid mallocing the universe
+ let resp = hyper::body::to_bytes(resp).await
+ .context("HTTP error fetching response body")?;
+
+ if ! status.is_success() {
+ throw!(anyhow!("HTTP error status={} body={:?}",
+ &status, String::from_utf8_lossy(&resp)));
+ }
+
+ Ok::<_,AE>(resp)
+ }).await? }.await;
+
+ let r = c.reporter.lock().filter(Some(req_num), r);
+
+ if r.is_none() {
+ tokio::time::sleep(c.ic.http_retry).await;
+ }
+ r
+ });
+ reqs.push(fut);
+}
+
+async fn run_client<C:HCC>(
+ ic: InstanceConfig,
+ hclient: Arc<hyper::Client<C>>
+) -> Result<Void, AE>
{
debug!("{}: config: {:?}", &ic, &ic);
+ let reporter = parking_lot::Mutex::new(Reporter::new(&ic));
+
+ let c = ClientContext {
+ reporter: &reporter,
+ hclient: &hclient,
+ ic: &ic,
+ effective_http_timeout: ic.http_timeout.checked_add(ic.http_timeout_grace)
+ .ok_or_else(|| anyhow!("calculate effective http timeout ({:?} + {:?})",
+ ic.http_timeout, ic.http_timeout_grace))?,
+ };
+
let mut ipif = tokio::process::Command::new("sh")
.args(&["-c", &ic.ipif])
.stdin (process::Stdio::piped())
Ok::<_,io::Error>(())
});
+ let mut req_num: ReqNum = 0;
+
let tx_stream = ipif.stdout.take().unwrap();
- let mut tx_stream = tokio::io::BufReader::new(tx_stream).split(SLIP_ESC);
- let mut tx_defer = None;
+ let mut rx_stream = ipif.stdin .take().unwrap();
- let stream_for_rx = ipif.stdin .take().unwrap();
+ let mut tx_stream = tokio::io::BufReader::new(tx_stream).split(SLIP_END);
+ let mut packets: VecDeque<Box<[u8]>> = default();
+ let mut upbound = Frames::default();
- let mut reqs = Vec::with_capacity(ic.max_requests_outstanding.sat());
+ let mut reqs: Vec<OutstandingRequest>
+ = Vec::with_capacity(ic.max_requests_outstanding.sat());
+
+ let mut rx_queue: FrameQueue = default();
+
+ // xxx check that ic settings are all honoured
async {
loop {
select! {
- packet = tx_stream.next_segment(),
- if tx_defer.is_none() &&
- reqs.len() < ic.max_requests_outstanding.sat() =>
+ y = rx_stream.write_all_buf(&mut rx_queue),
+ if ! rx_queue.is_empty() =>
+ {
+ let () = y.context("write rx data to ipif")?;
+ },
+
+ data = tx_stream.next_segment(),
+ if packets.is_empty() =>
+ {
+ let data =
+ data.context("read from ipif")?
+ .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
+ //eprintln!("data={:?}", DumpHex(&data));
+
+ match check1(Slip2Mime, ic.mtu, &data, |header| {
+ let addr = ip_packet_addr::<false>(header)?;
+ if addr != ic.link.client.0 { throw!(PE::Src(addr)) }
+ Ok(())
+ }) {
+ Ok(packet) => packets.push_back(packet),
+ Err(PE::Empty) => { },
+ Err(e@ PE::Src(_)) => debug!("{}: tx discarding: {}", &ic, e),
+ Err(e) => error!("{}: tx discarding: {}", &ic, e),
+ };
+ },
+
+ _ = async { },
+ if ! upbound.tried_full() &&
+ ! packets.is_empty() =>
{
- let mut upbound_total = 0;
- let mut upbound = vec![];
- let mut to_process: Option<Result<Option<Vec<u8>>,_>>
- = Some(packet);
- while let Some(packet) = to_process.take() {
- let mut packet =
- packet.context("read from ipif")?
- .ok_or_else(|| io::Error::from(io::ErrorKind::UnexpectedEof))?;
- if let Ok(()) = slip::check_checkmtu_mimeify(&mut packet, &ic) {
- let new_upbound_total = packet.len() + upbound_total + 1;
- if new_upbound_total > ic.max_batch_up.sat() {
- tx_defer = Some(packet);
- break;
- }
- upbound_total = new_upbound_total;
- upbound.push(packet);
- // we rely on `next_segment` being cancellation-safe,
- // which isn't documented as true but seems reasonably safe
- pin!{ let next_segment = tx_stream.next_segment(); }
- to_process = match poll!(next_segment) {
- Poll::Ready(p) => Some(p),
- Poll::Pending => None,
- };
+ while let Some(packet) = packets.pop_front() {
+ match upbound.add(ic.max_batch_up, packet.into()/*xxx*/) {
+ Err(packet) => { packets.push_front(packet.into()/*xxx*/); break; }
+ Ok(()) => { },
}
}
- assert!( to_process.is_none() );
- dbg!(&reqs.len(), &upbound_total, &upbound.len());
-/*
- Body
- made out of Stream
- made out of futures::stream::iter
-
-
- let datalen =
+ },
+
+ _ = async { },
+ if reporter.lock().filter(None, {
+ if rx_queue.remaining() < ic.max_batch_down.sat() * 3 /* xxx */ {
+ // xxx make this separate option ? docs say server only
+ Ok(())
+ } else {
+ Err(anyhow!("rx queue full"))
+ }
+ }).is_some() &&
+ (reqs.len() < ic.target_requests_outstanding.sat() ||
+ (reqs.len() < ic.max_requests_outstanding.sat() &&
+ ! upbound.is_empty()))
+ =>
+ {
+ submit_request(&c, &mut req_num, &mut reqs,
+ mem::take(&mut upbound).into())?;
+ },
+
+ (got, goti, _) = async { future::select_all(&mut reqs).await },
+ if ! reqs.is_empty() =>
+ {
+ reqs.swap_remove(goti);
+
+ if let Some(got) = got {
+ reporter.lock().success();
+ //eprintln!("got={:?}", DumpHex(&got));
+ checkn(SlipNoConv,ic.mtu, &got, &mut rx_queue, |header| {
+ let addr = ip_packet_addr::<true>(header)?;
+ if addr != ic.link.client.0 { throw!(PE::Dst(addr)) }
+ Ok(())
+ }, |e| error!("{} #{}: rx discarding: {}", &ic, req_num, e));
- let o = 0;
- let i =
-*/
- reqs.push(());
- // xxx make new request
+ }
}
}
}
#[tokio::main]
async fn main() -> Result<(), AE> {
- let ics = config::read(LinkEnd::Client)?;
+ let opts = Opts::from_args();
+
+ let ics = config::read(&opts.config, LinkEnd::Client)?;
if ics.is_empty() { throw!(anyhow!("no associations with server(s)")); }
- env_logger::init();
+ {
+ let env = env_logger::Env::new()
+ .filter("HIPPOTAT_LOG")
+ .write_style("HIPPOTAT_LOG_STYLE");
+
+ let mut logb = env_logger::Builder::new();
+ logb.filter(Some("hippotat"),
+ *[ log::LevelFilter::Info,
+ log::LevelFilter::Debug ]
+ .get(opts.debug)
+ .unwrap_or(
+ &log::LevelFilter::Trace
+ ));
+ logb.parse_env(env);
+ logb.init();
+ }
let https = HttpsConnector::new();
let hclient = hyper::Client::builder().build::<_, hyper::Body>(https);
~ian / hippotat.git / blobdiff