Format: 1.8
Date: Sat, 01 Aug 2026 06:43:00 +0200
Source: libnetplus
Binary: libnetplus-dev libnetplus1 libnetplus1-dbgsym netplus-certgen netplus-certgen-dbgsym
Architecture: source amd64
Version: 20260801+30
Distribution: unstable
Urgency: high
Maintainer: Jan Koester <jan.koester@tuxist.de>
Changed-By: Jan Koester <jan.koester@tuxist.de>
Description:
 libnetplus-dev - C++ socket and event library - development files
 libnetplus1 - C++ socket and event library
 netplus-certgen - Self-signed TLS certificate generator
Changes:
 libnetplus (20260801+30) unstable; urgency=high
 .
   * quic: fix accept()'s datagram-drain loop stalling on a contended
     per-connection mutex. Two sites — the inline long-header path for an
     existing connection, and flush_pending_app()'s deferred short-header
     flush — took an existing child connection's quic_mtx() with a
     blocking unique_lock. Both run inline on the single thread that
     drains a given listener (see accept()'s own concurrency note), so a
     connection busy elsewhere (e.g. mid-transfer, holding its own mutex
     for real work) could stall this entire drain call — and with it,
     every other connection's traffic in the same batch, and any brand-new
     incoming connection sitting later in it — for as long as that other
     thread held the lock. Root-caused live on a production mediadb node:
     a healthy peer's accept loop was blocked in
     pthread_mutex_lock()/quic::accept() while a client elsewhere
     (paritypp::client::connect_to_node()) got "Failed to connect to
     node X" on every 5-second-bounded retry, for minutes, even though
     ping and the peer's own accept-loop threads looked otherwise fine.
     Both sites now use try_lock and skip (rather than block) when a
     connection's mutex isn't immediately free — QUIC's own loss
     detection retransmits whatever gets skipped, far cheaper than
     blocking the shared accept path. Full existing QUIC test suite (87
     tests across quic_test/quic_rfc9000_test/quic_concurrent_test/
     quic_incremental_dispatch_test/quic_retry_test/
     quic_version_negotiation_test/quic_roundtrip_sha256_test) passes
     unchanged; benchmark_quic throughput unaffected.
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