SA_FLAG_DPD
isakmp_sa->flags |= SA_FLAG_DPD;
if (isakmp_sa->flags & SA_FLAG_DPD)
if (sa->phase == 1 || (args->isakmp_sa->flags & SA_FLAG_DPD) == 0 ||
if ((new_sa->flags & SA_FLAG_DPD) == SA_FLAG_DPD)