NEIGH_SEQ_IS_PNEIGH
state->flags &= ~NEIGH_SEQ_IS_PNEIGH;
state->flags |= NEIGH_SEQ_IS_PNEIGH;
state->flags = (neigh_seq_flags & ~NEIGH_SEQ_IS_PNEIGH);
if (!(state->flags & NEIGH_SEQ_IS_PNEIGH)) {
if (state->flags & NEIGH_SEQ_IS_PNEIGH)