config: config::Opts,
}
+const METADATA_MAX_LEN: usize = MAX_OVERHEAD;
+
+type AllClients = HashMap<ClientName, ClientHandles>;
+
+struct ClientHandles {
+ ic: Arc<InstanceConfig>,
+ web: tokio::sync::mpsc::Sender<WebRequest>,
+}
+
+/// Sent from hyper worker pool task to client task
+#[allow(dead_code)] // xxx
+struct WebRequest {
+ // initial part of body
+ // used up to and including first 2 lines of metadata
+ // end delimiter for the metadata not yet located, but in here somewhere
+ initial: Box<[u8]>,
+ initial_remaining: usize,
+ length_hint: usize,
+ body: hyper::body::Body,
+ boundary_finder: multipart::BoundaryFinder,
+ reply_to: tokio::sync::oneshot::Sender<WebResponse>,
+ warnings: Warnings,
+}
+
+/// Reply from client task to hyper worker pool task
+#[allow(dead_code)] // xxx
+struct WebResponse {
+ warnings: Warnings,
+ data: Result<WebResponseData, AE>,
+}
+
+type WebResponseData = ();
+
+async fn handle(
+ all_clients: Arc<AllClients>,
+ req: hyper::Request<hyper::Body>
+) -> Result<hyper::Response<hyper::Body>, Void> {
+ if req.method() == Method::GET {
+ let mut resp = hyper::Response::new(hyper::Body::from("hippotat\r\n"));
+ resp.headers_mut().insert(
+ "Content-Type",
+ "text/plain; charset=US-ASCII".try_into().unwrap()
+ );
+ return Ok(resp)
+ }
+
+ let mut warnings: Warnings = default();
+
+ match async {
+
+ let get_header = |hn: &str| {
+ let mut values = req.headers().get_all(hn).iter();
+ let v = values.next().ok_or_else(|| anyhow!("missing {}", hn))?;
+ if values.next().is_some() { throw!(anyhow!("multiple {}!", hn)); }
+ let v = v.to_str().context(anyhow!("interpret {} as UTF-8", hn))?;
+ Ok::<_,AE>(v)
+ };
+
+ let mkboundary = |b: &'_ _| format!("\n--{}", b).into_bytes();
+ let boundary = match (||{
+ let t = get_header("Content-Type")?;
+ let t: mime::Mime = t.parse().context("parse Content-Type")?;
+ if t.type_() != "multipart" { throw!(anyhow!("not multipart/")) }
+ let b = mime::BOUNDARY;
+ let b = t.get_param(b).ok_or_else(|| anyhow!("missing boundary=..."))?;
+ if t.subtype() != "form-data" {
+ warnings.add(&"Content-Type not /form-data")?;
+ }
+ let b = mkboundary(b.as_str());
+ Ok::<_,AE>(b)
+ })() {
+ Ok(y) => y,
+ Err(e) => {
+ warnings.add(&e.wrap_err("guessing boundary"))?;
+ mkboundary("b")
+ },
+ };
+
+ let length_hint: usize = (||{
+ let clength = get_header("Content-Length")?;
+ let clength = clength.parse().context("parse Content-Length")?;
+ Ok::<_,AE>(clength)
+ })().unwrap_or_else(
+ |e| { let _ = warnings.add(&e.wrap_err("parsing Content-Length")); 0 }
+ );
+
+ let mut body = req.into_body();
+ let initial = match read_limited_bytes(
+ METADATA_MAX_LEN, default(), length_hint, &mut body
+ ).await {
+ Ok(all) => all,
+ Err(ReadLimitedError::Truncated { sofar,.. }) => sofar,
+ Err(ReadLimitedError::Hyper(e)) => throw!(e),
+ };
+
+ let boundary_finder = memmem::Finder::new(&boundary);
+ let mut boundary_iter = boundary_finder.find_iter(&initial);
+
+ let start = if initial.starts_with(&boundary[1..]) { boundary.len()-1 }
+ else if let Some(start) = boundary_iter.next() { start + boundary.len() }
+ else { throw!(anyhow!("initial boundary not found")) };
+
+ let comp = multipart::process_boundary
+ (&mut warnings, &initial[start..], PartName::m)?
+ .ok_or_else(|| anyhow!(r#"no "m" component"#))?;
+
+ if comp.name != PartName::m { throw!(anyhow!(
+ r#"first multipart component must be name="m""#
+ )) }
+
+ let mut meta = MetadataFieldIterator::new(comp.payload);
+
+ let client: ClientName = meta.need_parse().context("client addr")?;
+
+ let mut hmac_got = [0; HMAC_L];
+ let (client_time, hmac_got_l) = (||{
+ let token: &str = meta.need_next().context(r#"find in "m""#)?;
+ let (time_t, hmac_b64) = token.split_once(' ')
+ .ok_or_else(|| anyhow!("split"))?;
+ let time_t = u64::from_str_radix(time_t, 16).context("parse time_t")?;
+ let l = io::copy(
+ &mut base64::read::DecoderReader::new(&mut hmac_b64.as_bytes(),
+ BASE64_CONFIG),
+ &mut &mut hmac_got[..]
+ ).context("parse b64 token")?;
+ let l = l.try_into()?;
+ Ok::<_,AE>((time_t, l))
+ })().context("token")?;
+ let hmac_got = &hmac_got[0..hmac_got_l];
+
+ let client = all_clients.get(&client);
+
+ // We attempt to hide whether the client exists we don't try to
+ // hide the hash lookup computationgs, but we do try to hide the
+ // HMAC computation by always doing it. We hope that the compiler
+ // doesn't produce a specialised implementation for the dummy
+ // secret value.
+ let client_exists = subtle::Choice::from(client.is_some() as u8);
+ let secret = client.map(|c| c.ic.secret.0.as_bytes());
+ let secret = secret.unwrap_or(&[0x55; HMAC_B][..]);
+ let client_time_s = format!("{:x}", client_time);
+ let hmac_exp = token_hmac(secret, client_time_s.as_bytes());
+ // We also definitely want a consttime memeq for the hmac value
+ let hmac_ok = hmac_got.ct_eq(&hmac_exp);
+ //dbg!(DumpHex(&hmac_exp), client.is_some());
+ //dbg!(DumpHex(hmac_got), hmac_ok, client_exists);
+ if ! bool::from(hmac_ok & client_exists) {
+ throw!(anyhow!("xxx should be a 403 error"));
+ }
+
+ let client = client.unwrap();
+ let now = time_t_now();
+ let chk_skew = |a: u64, b: u64, c_ahead_behind| {
+ if let Some(a_ahead) = a.checked_sub(b) {
+ if a_ahead > client.ic.max_clock_skew.as_secs() {
+ throw!(anyhow!("too much clock skew (client {} by {})",
+ c_ahead_behind, a_ahead));
+ }
+ }
+ Ok::<_,AE>(())
+ };
+ chk_skew(client_time, now, "ahead")?;
+ chk_skew(now, client_time, "behind")?;
+
+ let initial_remaining = meta.remaining_bytes_len();
+
+ //eprintln!("boundary={:?} start={} name={:?} client={}",
+ // boundary, start, &comp.name, &client.ic);
+
+ let (reply_to, reply_recv) = tokio::sync::oneshot::channel();
+ trace!("{} request xxx={}", &client.ic, initial.len());
+ let wreq = WebRequest {
+ initial,
+ initial_remaining,
+ length_hint,
+ boundary_finder: boundary_finder.into_owned(),
+ body,
+ warnings: mem::take(&mut warnings),
+ reply_to
+ };
+
+ client.web.try_send(wreq)
+ .map_err(|_| anyhow!("client task shut down!"))?;
+
+ let reply: WebResponse = reply_recv.await?;
+ warnings = reply.warnings;
+
+ reply.data
+ }.await {
+ Ok(()) => {
+ },
+ Err(e) => {
+ eprintln!("error={}", e);
+ }
+ }
+
+ eprintln!("warnings={:?}", &warnings);
+
+ Ok(hyper::Response::new(hyper::Body::from("Hello World")))
+}
+
+#[allow(unused_variables)] // xxx
+#[allow(unused_mut)] // xxx
+async fn run_client(ic: Arc<InstanceConfig>,
+ mut web: mpsc::Receiver<WebRequest>)
+ -> Result<Void, AE>
+{
+ struct Outstanding {
+ reply_to: tokio::sync::oneshot::Sender<WebResponse>,
+ max_requests_outstanding: u32,
+ }
+ let mut outstanding: VecDeque<Outstanding> = default();
+ let downbound: VecDeque<(/*xxx*/)> = default();
+
+ let try_send_response = |
+ reply_to: tokio::sync::oneshot::Sender<WebResponse>,
+ response: WebResponse
+ | {
+ reply_to.send(response)
+ .unwrap_or_else(|_: WebResponse| () /* oh dear */ /* xxx trace? */);
+ };
+
+ loop {
+ if let Some(ret) = {
+ if ! downbound.is_empty() {
+ outstanding.pop_front()
+ } else if let Some((i,_)) = outstanding.iter().enumerate().find({
+ |(_,o)| outstanding.len() > o.max_requests_outstanding.sat()
+ }) {
+ Some(outstanding.remove(i).unwrap())
+ } else {
+ None
+ }
+ } {
+ let response = WebResponse {
+ data: Ok(()),
+ warnings: default(),
+ };
+
+ try_send_response(ret.reply_to, response);
+ }
+
+ select!{
+ req = web.recv() =>
+ {
+ let WebRequest {
+ initial, initial_remaining, length_hint, mut body,
+ boundary_finder,
+ reply_to, warnings,
+ } = req.ok_or_else(|| anyhow!("webservers all shut down!"))?;
+
+ match async {
+
+ let initial_used = initial.len() - initial_remaining;
+
+ let whole_request = read_limited_bytes(
+ ic.max_batch_up.sat(),
+ initial,
+ length_hint,
+ &mut body
+ ).await.context("read request body")?;
+
+ let (meta, comps) =
+ multipart::ComponentIterator::resume_mid_component(
+ &whole_request[initial_used..],
+ boundary_finder
+ ).context("resume parsing body, after auth checks")?;
+
+ let mut meta = MetadataFieldIterator::new(&meta);
+
+ macro_rules! meta {
+ { $v:ident, ( $( $badcmp:tt )? ), $ret:expr,
+ let $server:ident, $client:ident $($code:tt)*
+ } => {
+ let $v = (||{
+ let $server = ic.$v;
+ let $client $($code)*
+ $(
+ if $client $badcmp $server {
+ throw!(anyhow!("mismatch: client={:?} {} server={:?}",
+ $client, stringify!($badcmp), $server));
+ }
+ )?
+ Ok::<_,AE>($ret)
+ })().context(stringify!($v))?;
+ dbg!(&$v);
+ }
+ }
+
+ meta!{
+ target_requests_outstanding, ( != ), client,
+ let server, client: u32 = meta.need_parse()?;
+ }
+
+ meta!{
+ http_timeout, ( > ), client,
+ let server, client = Duration::from_secs(meta.need_parse()?);
+ }
+
+ meta!{
+ max_batch_down, (), min(client, server),
+ let server, client: u32 = meta.parse()?.unwrap_or(server);
+ }
+
+ meta!{
+ max_batch_up, ( > ), client,
+ let server, client = meta.parse()?.unwrap_or(server);
+ }
+
+ Ok::<_,AE>(())
+ }.await {
+ Ok(()) => outstanding.push_back(Outstanding {
+ reply_to: reply_to,
+ max_requests_outstanding: 42, // xxx
+ }),
+ Err(e) => {
+ try_send_response(reply_to, WebResponse {
+ data: Err(e),
+ warnings,
+ });
+ },
+ }
+ }
+ }
+ }
+ //Err(anyhow!("xxx"))
+}
+
#[tokio::main]
async fn main() {
let opts = Opts::from_args();
- let (ics,) = config::startup("hippotatd", LinkEnd::Server,
- &opts.config, &opts.log);
+ let mut tasks: Vec<(
+ JoinHandle<AE>,
+ String,
+ )> = vec![];
+
+ let (global, ipif) = config::startup(
+ "hippotatd", LinkEnd::Server,
+ &opts.config, &opts.log, |ics|
+ {
+ let global = config::InstanceConfigGlobal::from(&ics);
+ let ipif = Ipif::start(&global.ipif, None)?;
+
+ let all_clients: AllClients = ics.into_iter().map(|ic| {
+ let ic = Arc::new(ic);
+
+ let (web_send, web_recv) = mpsc::channel(
+ 5 // xxx should me max_requests_outstanding but that's
+ // marked client-only so needs rework
+ );
+
+ let ic_ = ic.clone();
+ tasks.push((tokio::spawn(async move {
+ run_client(ic_, web_recv).await.void_unwrap_err()
+ }), format!("client {}", &ic)));
+
+ (ic.link.client,
+ ClientHandles {
+ ic,
+ web: web_send,
+ })
+ }).collect();
+ let all_clients = Arc::new(all_clients);
+
+ for addr in &global.addrs {
+ let all_clients_ = all_clients.clone();
+ let make_service = hyper::service::make_service_fn(move |_conn| {
+ let all_clients_ = all_clients_.clone();
+ async { Ok::<_, Void>( hyper::service::service_fn(move |req| {
+ handle(all_clients_.clone(), req)
+ }) ) } }
+ );
+
+ let addr = SocketAddr::new(*addr, global.port);
+ let server = hyper::Server::try_bind(&addr)
+ .context("bind")?
+ .http1_preserve_header_case(true)
+ .serve(make_service);
+ info!("listening on {}", &addr);
+ let task = tokio::task::spawn(async move {
+ match server.await {
+ Ok(()) => anyhow!("shut down?!"),
+ Err(e) => e.into(),
+ }
+ });
+ tasks.push((task, format!("http server {}", addr)));
+ }
+
+ Ok((global, ipif))
+ });
+
+ let died = future::select_all(
+ tasks.iter_mut().map(|e| &mut e.0)
+ ).await;
+ error!("xxx {:?}", &died);
- let global = config::InstanceConfigGlobal::from(&ics);
+ ipif.quitting(None).await;
- dbg!(ics, global);
+ dbg!(global);
}
~ian / hippotat.git / blobdiff