[PATCH 1/4] include: Add remaining IPv4 socket options

[Chip Davis]

August 8, 2021 10:45 PM, "Alex Henrie" <alexhenrie24 at gmail.com> wrote:

> The same option apparently causes both the hop limit and the
> time-to-live to be received.

Of course, because that's what time-to-live is--a hop limit. traceroute(8) works by starting with TTL=1, progressively increasing it and seeing where the packet stops each time.

Chip