tree 0f6f7fe9f99cfad662dc861cff23d0f5b7d3b0cb
parent 6928043a799b4257b048ed6c4a54156fc0f0c339
author ericorth <ericorth@google.com> 1787861471 -0700
committer Copybara-Service <copybara-worker@google.com> 1787861522 -0700

QBONE TUN exchanger async refactor: Pass exchanger an exchanger ;)

Final (I think) refactor needed to unblock off-threading TUN writes.

Need to pass an exchanger instance to the exchanger for use for underlying-triggered operations.  Particularly, if a read packet is link-local and requires a response directly written back to TUN, the passed exchanger will be used instead of `this`. Allows better layering of implementations so when I have an inner "thread-local" exchanger (essentially the current impl) being used by an outer thread-offloading exchanger, the inner exchanger can send writes correctly to the outer exchanger that can write using a worker thread instead of sending writes in-thread.

PiperOrigin-RevId: 972116597