* give the kernel some time to free the socket
* remove problematic assertion
The listen function is started in a Goroutine, hence we
can’t be sure it’s already started.
The previous logic allowed for setting different ALPN
values depending on the QUIC version in use. This was
needed to set the draft ALPN value before publication of
the RFC.
New PATH_CHALLENGES are sent for as long as the call to
Path.Probe is active. The first retransmission is sent after 200ms,
with an exponential backoff afterwards.
Several proxy tests timed out because it got stuck in the packet read
loop after all tests have run. Avoid this by running the `conn.Close()`
Cleanup call from `newUPDConnLocalhost` before the timeout handler.
Update CI to run these tests.
Fixes: 3e87ea3f50 ("proxy: add function to simulate NAT rebinding (#4922)")
Relates to: #5009
* make it possible to pack path probes with multiple frames
* simplify function signature of pathManager.HandlePacket
* simplify connection short header packet handling logic
No functional change expected.
* make server send PATH_RESPONSEs on the same path
This makes sure that we’re actually testing for return routability.
A reordered PATH_CHALLENGE (or one sent on a slower path)
should still trigger a PATH_RESPONSE. The RFC only forbids
switching the path unless the non-probing packet has the
highest packet number received so far.
When receiving a ClientHello for a 0-RTT connection, this allows us to derive both 0-RTT and Handshake keys at the same time. The previous logic used to inadvertently discard previously undecryptable packets (e.g. reordered 0-RTT packets).
* remove unused bool return value from sentPacketHandler.getPTOTimeAndSpace
* ackhandler: implement timer logic for path probing packets
Path probe packets are treated differently from regular packets: The new
path might have a vastly different RTT than the original path.
Path probe packets are declared lost 1s after they are sent. This value
can be reduced, once implement proper retransmission logic for lost path
probes.
* ackhandler: declare path probes lost on OnLossDetectionTimeout
Reduces memory usage by replacing a fixed-capacity channel (256) with a
ring buffer (initial capacity: 8). The buffer grows to 256 only when
many packets are enqueued.
