tree d52d4292501b98af7f34df354507f5ad6fa03a12
parent 7ad8059b59c02e3a1c7481142401347546533c48
author martinduke <martinduke@google.com> 1756416367 -0700
committer Copybara-Service <copybara-worker@google.com> 1756416414 -0700

Close Connection when outgoing ACK frame is empty.

This can only happen when the peer is misbehaving, sending an opportunistic ACK for a packet it could not have received. Opportunistic ACKs are potentially an attack.

Until quic_least_unacked_plus_1 was verified, the failure to clear all obsolete ACK blocks masked this bug.

Protected by FLAGS_quic_reloadable_flag_quic_fail_on_empty_ack.

PiperOrigin-RevId: 800613375