Dead since introduction in 2001 with icmp6.c r1.31:
implement upper limit to icmp6 redirects (experimental, turned off)
negative value to {mtudisc,redirect}_{hi,lo}wat will turn off the
limitation.
sync with kame.
icmp6_redirect_lowat was always -1 and never hit the empty conditional.
icmp6_redirect_hiwat never existed.
icmp6_mtudisc_{hi,lo}wat are exposed as net.inet6.icmp6.mtudisc_{hi,lo}wat
sysctl(2)s, so don't touch those for now.
Feedback? OK?
diff --git a/sys/netinet6/icmp6.c b/sys/netinet6/icmp6.c
index 94612a560c3..7a64861d15f 100644
--- a/sys/netinet6/icmp6.c
+++ b/sys/netinet6/icmp6.c
@@ -129,9 +129,6 @@ static int icmp6_mtudisc_lowat = 256;
*/
struct rttimer_queue icmp6_redirect_timeout_q;
-/* XXX experimental, turned off */
-static int icmp6_redirect_lowat = -1;
-
void icmp6_errcount(int, int);
int icmp6_ratelimit(const struct in6_addr *, const int, const int);
const char *icmp6_redirect_diag(struct in6_addr *, struct in6_addr *,
@@ -1386,12 +1383,6 @@ icmp6_redirect_input(struct mbuf *m, int off)
rtcount = rt_timer_queue_count(&icmp6_redirect_timeout_q);
if (0 <= ip6_maxdynroutes && rtcount >= ip6_maxdynroutes)
goto freeit;
- else if (0 <= icmp6_redirect_lowat &&
- rtcount > icmp6_redirect_lowat) {
- /*
- * XXX nuke a victim, install the new one.
- */
- }
bzero(&sdst, sizeof(sdst));
bzero(&sgw, sizeof(sgw));
