Here are the data structures with brief descriptions:

[detail level 123]

C__ns_msg
C__ns_rr
C__omapi_connection_object
C__omapi_generic_object
C__omapi_handle_table
C__omapi_io_object
C__omapi_listener_object
C__omapi_message_object
C__omapi_object
C__omapi_object_type_t
C__omapi_protocol_object
C__omapi_remote_auth
C__omapi_waiter_object
C_ns_flagdata
C_omapi_buffer
C_pair
Cagent_options
Cauth_key
Cbinding
Cbinding_scope
▶Cbinding_value
Cvalue
Cbuffer
Cclass
Cclient_config
Cclient_lease
Cclient_state
Ccollection
Cdata_string
Cddns_fqdn_t
Cdhc6_addr
Cdhc6_ia
Cdhc6_lease
Cdhcp_context
Cdhcp_control_object_t
Cdhcp_ddns_cb
Cdhcp_ddns_rdata
Cdhcp_packet
Cdhcpctl_callback_object_t
Cdhcpctl_remote_object_t
Cdhcpv4_over_dhcpv6_packet
Cdhcpv6_packet
Cdhcpv6_relay_packet
Cdns_answer
Cdns_host_entry
Cdns_query
Cdns_question
Cdns_update_state
Cdns_wakeup
Cdns_zone
Cdomain_search_list
Cdst_key
Cenumeration
Cenumeration_value
Cenvadd_state
Cether_addr
Ceventqueue
Cexecutable_statement
▶Cexpression
Cexpr_union
Cfundef
Cgroup
Cgroup_object
Chardware
Chardware_link
Chash_bucket
Chash_table
Chashed_object_t
CHEADER
Chost_decl
Chost_id_info
Cia_xx
Ciaddr
Ciaddrcidrnet
Ciaddrcidrnetlist
Ciaddrlist
Ciaddrmatch
Ciaddrmatchlist
Ciasubopt
Cicmp
Cicmp_ra_addr
Cicmp_state
Ciface_conf_list
Ciface_info
Cinterface_info
Cip
▶Cip_timestamp
▶Cipt_timestamp
Cipt_ta
Cipv6_pond	Ipv6_pond structure
Cipv6_pool	Ipv6_pool structure
Cisc_ether_header
Clease
Clease_state
Cleasechain
Cleasequeue
Cname_server
Cnamed_hash
Comapi_addr_list_t
Comapi_addr_t
Comapi_array_t
Comapi_data_string_t
Comapi_protocol_header_t
Comapi_protocol_listener_object_t
Comapi_typed_data_t
Comapi_value_t
Con_star
Coption
Coption_cache
Coption_chain_head
Coption_state
Coption_tag
Cpacket
Cparse
Cpermit
Cpool
Cprotocol
Cserver_list
Cshared_network
Cstring_list
Csubnet
Ctestspec_t
Ctimeout
Ctrace_addr_t
Ctrace_index_mapping_t
Ctrace_inpacket_t
Ctrace_interface_packet_t
Ctrace_iov
Ctrace_outpacket_t
Ctrace_type
Ctracefile_header_t
Ctracepacket_t
Cudphdr
Cuniverse
Cvsio_state