Here are the data structures with brief descriptions:

C_container_policy_cb
Cnftnl_batch
Cnftnl_batch_page
Cnftnl_chain
Cnftnl_chain_list
Cnftnl_chain_list_iter
Cnftnl_expr_bitwise
Cnftnl_expr_byteorder
Cnftnl_expr_cmp
Cnftnl_expr_connlimit
Cnftnl_expr_counter
Cnftnl_expr_ct
Cnftnl_expr_dup
Cnftnl_expr_dynset
Cnftnl_expr_exthdr
Cnftnl_expr_fib
Cnftnl_expr_flow
Cnftnl_expr_fwd
Cnftnl_expr_hash
Cnftnl_expr_immediate
Cnftnl_expr_iter
Cnftnl_expr_limit
Cnftnl_expr_log
Cnftnl_expr_lookup
Cnftnl_expr_masq
Cnftnl_expr_match
Cnftnl_expr_meta
Cnftnl_expr_nat
Cnftnl_expr_ng
Cnftnl_expr_objref
Cnftnl_expr_osf
Cnftnl_expr_payload
Cnftnl_expr_queue
Cnftnl_expr_quota
Cnftnl_expr_range
Cnftnl_expr_redir
Cnftnl_expr_reject
Cnftnl_expr_rt
Cnftnl_expr_socket
Cnftnl_expr_synproxy
Cnftnl_expr_target
Cnftnl_expr_tproxy
Cnftnl_expr_tunnel
Cnftnl_expr_xfrm
Cnftnl_flowtable
Cnftnl_flowtable_list
Cnftnl_gen
Cnftnl_header_data
Cnftnl_obj_list
Cnftnl_obj_list_iter
Cnftnl_parse_ctx
Cnftnl_rule_iter
Cnftnl_rule_list
Cnftnl_rule_list_iter
Cnftnl_ruleset
Cnftnl_set_elems_iter
Cnftnl_set_list
Cnftnl_set_list_iter
Cnftnl_table
Cnftnl_table_list
Cnftnl_table_list_iter
Cnftnl_trace