PFTM_UNLINKED
KKASSERT(state->timeout != PFTM_UNLINKED);
cur->timeout = PFTM_UNLINKED;
KKASSERT(cur->timeout == PFTM_UNLINKED);
if (cur->timeout == PFTM_UNLINKED) {
if (state->timeout != PFTM_UNLINKED) {