RB_NEXT
nexts = RB_NEXT(pf_state_tree_id, &tree_id, st);
nextsk = RB_NEXT(pf_state_tree_lan_ext,
next = RB_NEXT(pf_src_tree, &tree_src_tracking, cur);
next = RB_NEXT(pf_src_tree,
f->child = RB_NEXT(pf_anchor_node, f->parent, f->child);
nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
nexts = RB_NEXT(pf_state_tree_id, &tree_id, ps);
nexts = RB_NEXT(pf_state_tree_id, &tree_id, ps);
nxt = RB_NEXT(name, head, var); \
nxt = RB_NEXT(name, head, var); \