Merge branch 'main' into quic-address-discovery

Author: divagant-martian

.github/workflows/codecov.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: taiki-e/install-action@cargo-llvm-cov
       - run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: lcov.info

.github/workflows/rust.yml

@@ -60,6 +60,28 @@ jobs:
 
             cargo build --all-targets && cargo test && cargo test --manifest-path fuzz/Cargo.toml && cargo test -p quinn-udp --benches
 
+  test-solaris:
+    name: test on solaris
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: test on Solaris
+        uses: vmactions/solaris-vm@v1
+        with:
+          release: "11.4-gcc"
+          usesh: true
+          mem: 4096
+          copyback: false
+          prepare: |
+            source <(curl -s https://raw.githubusercontent.com/psumbera/solaris-rust/refs/heads/main/sh.rust-web-install)
+            echo "~~~~ rustc --version ~~~~"
+            rustc --version
+            echo "~~~~ Solaris-version ~~~~"
+            uname -a
+          run: |
+            export PATH=$HOME/.rust_solaris/bin:$PATH
+            cargo build --all-targets && cargo test && cargo test --manifest-path fuzz/Cargo.toml && cargo test -p quinn-udp --benches
+
   test:
     strategy:
       matrix:
@@ -121,11 +143,6 @@ jobs:
 
       - name: Install cargo binstall
         uses: cargo-bins/cargo-binstall@main
-      
-      # We need to downgrade cc to version 1.1.31 for ring Wasm compilation to work.
-      # See the upstream issue https://github.com/rust-lang/cc-rs/issues/1275
-      - name: Use working `cc` version 1.1.31
-        run: cargo update -p cc --precise 1.1.31
 
       - name: build wasm32 tests (quinn-proto)
         run: cargo test -p quinn-proto --target wasm32-unknown-unknown --no-run
@@ -146,6 +163,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      # Note that we must also update the README when changing the MSRV
       - uses: dtolnay/[email protected]
       - uses: Swatinem/rust-cache@v2
       - run: cargo check --lib --all-features -p quinn-udp -p quinn-proto -p quinn

README.md

@@ -24,7 +24,7 @@ The project was founded by [Dirkjan Ochtman](https://github.com/djc) and
   [rustls][rustls] and [*ring*][ring]
 - Application-layer datagrams for small, unreliable messages
 - Future-based async API
-- Minimum supported Rust version of 1.66
+- Minimum supported Rust version of 1.70
 
 ## Overview
 

deny.toml

@@ -7,7 +7,7 @@ allow = [
     "MIT",
     "MPL-2.0",
     "OpenSSL",
-    "Unicode-DFS-2016",
+    "Unicode-3.0",
 ]
 private = { ignore = true }
 

perf/src/bin/perf_client.rs

@@ -308,7 +308,7 @@ async fn request(
 
     let send_stream_stats = stream_stats.new_sender(&send, upload);
 
-    const DATA: [u8; 1024 * 1024] = [42; 1024 * 1024];
+    static DATA: [u8; 1024 * 1024] = [42; 1024 * 1024];
     while upload > 0 {
         let chunk_len = upload.min(DATA.len() as u64);
         send.write_chunk(Bytes::from_static(&DATA[..chunk_len as usize]))

perf/src/bin/perf_server.rs

@@ -215,7 +215,7 @@ async fn drain_stream(mut stream: quinn::RecvStream) -> Result<()> {
 }
 
 async fn respond(mut bytes: u64, mut stream: quinn::SendStream) -> Result<()> {
-    const DATA: [u8; 1024 * 1024] = [42; 1024 * 1024];
+    static DATA: [u8; 1024 * 1024] = [42; 1024 * 1024];
 
     while bytes > 0 {
         let chunk_len = bytes.min(DATA.len() as u64);

quinn-proto/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "quinn-proto"
-version = "0.11.9"
+version = "0.11.10"
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
@@ -10,9 +10,6 @@ keywords.workspace = true
 categories.workspace = true
 workspace = ".."
 
-[package.metadata.docs.rs]
-all-features = true
-
 [features]
 default = ["rustls-ring", "log"]
 aws-lc-rs = ["dep:aws-lc-rs", "aws-lc-rs?/aws-lc-sys", "aws-lc-rs?/prebuilt-nasm"]
@@ -66,3 +63,7 @@ wasm-bindgen-test = { workspace = true }
 [lints.rust]
 # https://rust-fuzz.github.io/book/cargo-fuzz/guide.html#cfgfuzzing
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(fuzzing)'] }
+
+[package.metadata.docs.rs]
+# all non-default features except fips (cannot build on docs.rs environment)
+features = ["rustls-aws-lc-rs", "rustls-ring", "platform-verifier", "log", "rustls-log"]

quinn-proto/src/connection/ack_frequency.rs

@@ -121,9 +121,7 @@ impl AckFrequencyState {
     ) -> Result<bool, TransportError> {
         if self
             .last_ack_frequency_frame
-            .map_or(false, |highest_sequence_nr| {
-                frame.sequence.into_inner() <= highest_sequence_nr
-            })
+            .is_some_and(|highest_sequence_nr| frame.sequence.into_inner() <= highest_sequence_nr)
         {
             return Ok(false);
         }

quinn-proto/src/connection/mod.rs

@@ -32,7 +32,7 @@ use crate::{
     token::ResetToken,
     transport_parameters::TransportParameters,
     Dir, Duration, EndpointConfig, Frame, Instant, Side, StreamId, Transmit, TransportError,
-    TransportErrorCode, VarInt, MAX_CID_SIZE, MAX_STREAM_COUNT, MIN_INITIAL_SIZE,
+    TransportErrorCode, VarInt, INITIAL_MTU, MAX_CID_SIZE, MAX_STREAM_COUNT, MIN_INITIAL_SIZE,
     TIMER_GRANULARITY,
 };
 
@@ -700,13 +700,21 @@ impl Connection {
                         // waste large amounts of bandwidth. The exact threshold is a bit arbitrary
                         // and might benefit from further tuning, though there's no universally
                         // optimal value.
+                        //
+                        // Additionally, if this datagram is a loss probe and `segment_size` is
+                        // larger than `INITIAL_MTU`, then padding it to `segment_size` to continue
+                        // the GSO batch would risk failure to recover from a reduction in path
+                        // MTU. Loss probes are the only packets for which we might grow
+                        // `buf_capacity` by less than `segment_size`.
                         const MAX_PADDING: usize = 16;
                         let packet_len_unpadded = cmp::max(builder.min_size, buf.len())
                             - datagram_start
                             + builder.tag_len;
-                        if packet_len_unpadded + MAX_PADDING < segment_size {
+                        if packet_len_unpadded + MAX_PADDING < segment_size
+                            || datagram_start + segment_size > buf_capacity
+                        {
                             trace!(
-                                "GSO truncated by demand for {} padding bytes",
+                                "GSO truncated by demand for {} padding bytes or loss probe",
                                 segment_size - packet_len_unpadded
                             );
                             builder_storage = Some(builder);
@@ -749,7 +757,17 @@ impl Connection {
                 }
 
                 // Allocate space for another datagram
-                buf_capacity += segment_size;
+                let next_datagram_size_limit = match self.spaces[space_id].loss_probes {
+                    0 => segment_size,
+                    _ => {
+                        self.spaces[space_id].loss_probes -= 1;
+                        // Clamp the datagram to at most the minimum MTU to ensure that loss probes
+                        // can get through and enable recovery even if the path MTU has shrank
+                        // unexpectedly.
+                        usize::from(INITIAL_MTU)
+                    }
+                };
+                buf_capacity += next_datagram_size_limit;
                 if buf.capacity() < buf_capacity {
                     // We reserve the maximum space for sending `max_datagrams` upfront
                     // to avoid any reallocations if more datagrams have to be appended later on.
@@ -963,14 +981,10 @@ impl Connection {
         // Send MTU probe if necessary
         if buf.is_empty() && self.state.is_established() {
             let space_id = SpaceId::Data;
-            let probe_size = match self
+            let probe_size = self
                 .path
                 .mtud
-                .poll_transmit(now, self.packet_number_filter.peek(&self.spaces[space_id]))
-            {
-                Some(next_probe_size) => next_probe_size,
-                None => return None,
-            };
+                .poll_transmit(now, self.packet_number_filter.peek(&self.spaces[space_id]))?;
 
             let buf_capacity = probe_size as usize;
             buf.reserve(buf_capacity);
@@ -1645,7 +1659,7 @@ impl Connection {
                             None if self
                                 .path
                                 .first_packet_after_rtt_sample
-                                .map_or(false, |x| x < (pn_space, packet)) =>
+                                .is_some_and(|x| x < (pn_space, packet)) =>
                             {
                                 persistent_congestion_start = Some(info.time_sent);
                             }
@@ -2220,7 +2234,7 @@ impl Connection {
                 let _guard = span.enter();
 
                 let is_duplicate = |n| self.spaces[packet.header.space()].dedup.insert(n);
-                if number.map_or(false, is_duplicate) {
+                if number.is_some_and(is_duplicate) {
                     debug!("discarding possible duplicate packet");
                     return;
                 } else if self.state.is_handshake() && packet.header.is_short() {
@@ -3640,13 +3654,13 @@ impl Connection {
             || self
                 .prev_path
                 .as_ref()
-                .map_or(false, |(_, x)| x.challenge_pending)
+                .is_some_and(|(_, x)| x.challenge_pending)
             || !self.path_responses.is_empty()
             || self
                 .datagrams
                 .outgoing
                 .front()
-                .map_or(false, |x| x.size(true) <= max_size)
+                .is_some_and(|x| x.size(true) <= max_size)
     }
 
     /// Update counters to account for a packet becoming acknowledged, lost, or abandoned

quinn-proto/src/connection/mtud.rs

@@ -417,7 +417,7 @@ impl BlackHoleDetector {
         let end_last_burst = self
             .current_loss_burst
             .as_ref()
-            .map_or(false, |current| pn - current.latest_non_probe != 1);
+            .is_some_and(|current| pn - current.latest_non_probe != 1);
 
         if end_last_burst {
             self.finish_loss_burst();