tree 828998b52a73c9d28969b2490d4df4a5eec8deb5
parent a68d0aabb5ac9d0c866f134cf933c30f0ada34c3
author ericorth <ericorth@google.com> 1786057983 -0700
committer Copybara-Service <copybara-worker@google.com> 1786058025 -0700

QBONE TUN exchanger async refactor: Make exchanger start/stop more explicit

Needed to ensure clean interactions with starting/stopping off-thread writes.

Also, now more explicitly a bug to call read/write without a valid socket, rather than being treated as a read/write error, but in a quick look through our code, I don't think we ever try to do read/writes if socket setup fails. Necessary mostly so I can consistently promise the Visitor won't receive callbacks after Stop().

PiperOrigin-RevId: 960557539