pub fn adopt(
response: Option<SessionExpires>,
asked_for: Option<Duration>,
) -> Option<Session>Expand description
What a UAC learns from the 2xx to its own session refresh request (RFC 4028 §7.2).
asked_for is the interval this side put in the request, if any. It matters because a 2xx
with no Session-Expires from a peer that never claimed to support timers does not mean “no
timer” — §7.2 says the UAC may run one anyway, as refresher, purely for its own benefit.
The agreed interval is floored at ABSOLUTE_MIN_INTERVAL. §9 forbids a UAS from returning
anything shorter, and §11.2 explains what a shorter one would be: a way to make this side
emit requests as fast as the far end likes. Trusting the number because it arrived in a 2xx
would leave the defence entirely in the hands of the party it defends against.