Function sppp_chap_tlu

freebsd/net/if_spppsubr.c:4259–4315

}

static void
sppp_chap_tlu(struct sppp *sp)
{
	STDDCL;
	int i;

	i = 0;
	sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;

	/*
	 * Some broken CHAP implementations (Conware CoNet, firmware
	 * 4.0.?) don't want to re-authenticate their CHAP once the
	 * initial challenge-response exchange has taken place.
	 * Provide for an option to avoid rechallenges.
	 */
	if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
		/*
		 * Compute the re-challenge timeout.  This will yield
		 * a number between 300 and 810 seconds.
		 */
		i = 300 + ((unsigned)(random() & 0xff00) >> 7);
		callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, (void *)sp);
	}

	if (debug) {
		log(LOG_DEBUG,
		    SPP_FMT "chap %s, ",
		    SPP_ARGS(ifp),
		    sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
		if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
			log(-1, "next re-challenge in %d seconds\n", i);
		else
			log(-1, "re-challenging suppressed\n");
	}

	SPPP_LOCK(sp);
	/* indicate to LCP that we need to be closed down */
	sp->lcp.protos |= (1 << IDX_CHAP);

	if (sp->pp_flags & PP_NEEDAUTH) {
		/*
		 * Remote is authenticator, but his auth proto didn't
		 * complete yet.  Defer the transition to network
		 * phase.
		 */
		SPPP_UNLOCK(sp);
		return;
	}
	SPPP_UNLOCK(sp);

	/*
	 * If we are already in phase network, we are done here.  This
	 * is the case if this is a dummy tlu event after a re-challenge.
	 */
	if (sp->pp_phase != PHASE_NETWORK)
		sppp_phase_network(sp);
}