tree c2dcf85aac40cd94ff7b9c30422bf495095def65
parent 955aad3b75e8c6e2b1e1c5002e22d0c8430ed982
author QUICHE team <quiche-dev@google.com> 1792598939 -0700
committer Copybara-Service <copybara-worker@google.com> 1792598979 -0700

QBONE Bonnet: pull netlink usage out of packet exchanger

We had organically evolved to a point where every queue silo needed its own netlink to hand to a packet exchanger to craft `ethhdr`s, even though the header was uniform and constant.

Instead, in TAP mode, `TunTapDevice` builds its own eth_hdr via `ioctl(SIOCGIFHWADDR)` once the device is opened, which is passed as a parameter to any override or wrapper of `QboneClientPacketExchanger::Start`

Additionally move the eBPF loader creation up one level so that `QboneTunnel` can be agnostic as to whether the underlying device is TAP vs. TUN

PiperOrigin-RevId: 1003988200