tree b71105f34344e53d22cc5aed704104ae03a4afb3
parent de77648885a3c71a0dcdc1b8df572177c8af95fc
author QUICHE team <quiche-dev@google.com> 1766520772 -0800
committer Copybara-Service <copybara-worker@google.com> 1766520835 -0800

QBONE ICMP reachable: eliminate last usage of `SOCK_RAW`.

A prior CL converted the send direction to [`SOCK_DGRAM`](https://lore.kernel.org/all/20110510180957.GA3262@albatros/) but the receive direction was also using raw sockets, with socket options set using `struct icmp6_filter`.
Now that we are using `SOCK_DGRAM`, we can simply read the ICMP echo responses from the same socket, greatly simplifying all of this.

PiperOrigin-RevId: 848258830