Thomas Eizinger d718c5de8e fix(connlib): retry packets on IO error 5 (#10279) ...

Unfortunately, it isn't very easy to detect whether a socket supports
GSO on Linux. Hence, `quinn-udp` simply probes for its support by trying
to send GSO batches and effectively disables GSO by setting the
`max-gso-segments` state variable to 1 if it encounters either EINVAL
(-22) or EIO (-5).

For EINVAL, `quinn-udp` has an internal retry mechanism. For EIO, the
`Transmit` which is passed to `quinn-udp` needs to be re-chunked and
thus cannot be automatically retried.

In order to avoid dropping packets, we therefore add a once-off retry
step to sending a datagram whenever we hit EIO on Linux or Android. If
the error was due to GSO not being supported, the 2nd attempt should be
successful and going forward, even the first one should be until we roam
the socket (where this state variable gets reset).

These packet drops have been causing flakiness in CI ever since we
merged the eBPF tests. Those disable checksum offloading which appears
to trigger these errors.

2025-09-02 21:31:57 +00:00

..

dns_control_windows.rs

refactor(connlib): periodically record queue depths (#10242)

2025-09-02 02:57:36 +00:00

network_notifiers.rs

refactor(rust): move dns-control to bin-shared (#9023)

2025-05-06 01:29:09 +00:00

no_packet_loops_tcp.rs

feat(connlib): improve throughput on higher latencies (#10231)

2025-08-20 23:08:56 +00:00

no_packet_loops_udp.rs

fix(connlib): retry packets on IO error 5 (#10279)

2025-09-02 21:31:57 +00:00

tunnel_drop.rs

feat(connlib): improve throughput on higher latencies (#10231)

2025-08-20 23:08:56 +00:00