http://bugs.winehq.org/show_bug.cgi?id=59427 --- Comment #2 from og.o_o.yrec@proton.me --- (In reply to Zeb Figura from comment #1)
Is there an application that depends on this?
Yes. One concrete consumer is the Rust QUIC stack "quinn" (via its `quinn-udp` crate). On Windows it enables ECN reception using `setsockopt(IPPROTO_IP, IP_RECVECN, 1)` / `setsockopt(IPPROTO_IPV6, IPV6_RECVECN, 1)` so it can read ECN bits from incoming packets. Under Wine 11.0 these calls fail with WSAENOPROTOOPT (10042) and “Unknown … optname 0x32”, which can prevent QUIC endpoint creation (i.e. the application fails to start under Wine/Proton if ECN is enabled unconditionally). Upstream reference: https://github.com/quinn-rs/quinn/pull/2532 -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.