SCTP_MAX_PLPMTU
if (t->pl.probe_size < SCTP_MAX_PLPMTU) {
SCTP_MAX_PLPMTU);
t->pl.probe_high = SCTP_MAX_PLPMTU;
t->pl.probe_size = min(t->pl.probe_size + SCTP_PL_MIN_STEP, SCTP_MAX_PLPMTU);