```erlang Here is the list of available events in ejabberd. The types of the corresponding hooks parameters is described below.  adhoc_local_items(Acc, From, To, Lang) -> Adhoc adhoc_sm_items(Acc, From, To, Lang) -> Adhoc anonymous_purge_hook(User, Server) -> ok c2s_auth_result(bool(), User, Server, IP) -> ok c2s_broadcast_recipients(Acc, Server, StateData, Type, From, Packet) -> [] c2s_filter_packet(Acc, Server, C2SState, Feature, To, Packet) -> bool() c2s_filter_packet_in(Acc, JID, From, To) -> FixedPacket c2s_loop_debug({route, From, To, Packet}) -> ok c2s_loop_debug(Text) -> ok c2s_loop_debug({xmlstreamelement, Packet}) -> ok c2s_post_auth_features(Acc, Server) -> [] c2s_presence_in(Acc, {From, To, Packet}) -> C2SState c2s_stream_features(Acc, Server) -> [] c2s_unauthenticated_iq(Acc, Server, IQ, IP) -> empty | Packet c2s_update_presence(Acc, User, Server) -> Packet caps_update(From, To, get_features(Server, Caps)) -> ok csi_filter_stanza(Acc, Stanza) -> send disco_info(Acc, Host, Module, Node, Lang) -> [] disco_local_features(Acc, From, To, Node, Lang) -> Disco disco_local_identity(Acc, From, To, Node, Lang) -> [] disco_local_items(Acc, From, To, Node, Lang) -> Disco disco_sm_features(Acc, From, To, Node, Lang) -> Disco disco_sm_identity(Acc, From, To, Node, Lang) -> [] disco_sm_items(Acc, From, To, Node, Lang) -> Disco filter_packet(Acc) -> OrigPacket forbidden_session_hook(JID) -> ok http_request_debug({LocalPath, Request}) -> ok local_send_to_resource_hook(From, To, Packet) -> ok muc_filter_message(Stanza, MUCState, RoomJID, FromJID, FromNick) -> Stanza drop muc_filter_presence(Stanza, MUCState, RoomJID, FromJID, FromNick) -> Stanza drop offline_message_hook(From, To, Packet) -> ok presence_probe_hook(From, To, Pid) -> ok privacy_check_packet(Acc, User, Server, PrivacyList, {From, To, Packet}, Dir) -> Auth privacy_get_user_list(Acc, User, Server) -> #userlist{} privacy_iq_get(Acc, From, To, IQ, PrivacyList) -> {result, Packet} | {error, Error} privacy_iq_set(Acc, From, To, IQ) -> {result, Packet} | {error, Error} privacy_updated_list(Acc, PrivacyList, PrivList) -> bool() pubsub_create_node(ServerHost, Host, Node, NodeId, NodeOptions) -> ok pubsub_delete_node(ServerHost, Host, Node, NodeId) -> ok pubsub_publish_item(ServerHost, Node, Publisher, service_jid(Host), ItemId, Payload) -> ok register_user(User, Server) -> ok remove_user(User, Server) -> ok reopen_log_hook() -> ok resend_offline_messages_hook(Acc, User, Server) -> [] resend_subscription_requests_hook(Acc, User, Server) -> [] roster_get(Acc, {User, Server}) -> [] roster_get_jid_info(Acc, User, Server, From) -> []} roster_get_subscription_lists(Acc, User, Server) -> []} roster_get_versioning_feature(Acc, Server) -> [] roster_groups(Acc, ServerHost) -> [] roster_in_subscription(Acc, User, Server, From, SubscriptionInType, Reason) -> bool() roster_out_subscription(User, Server, To, SubscriptionOutType) -> ok roster_process_item(Acc, Server) -> RosterItem s2s_allow_host(Acc, Host, Host) -> Auth s2s_connect_hook(Host, Server) -> ok s2s_loop_debug({xmlstreamelement, Packet}) -> ok s2s_receive_packet(From, To, Packet) -> ok s2s_send_packet(From, To, Packet) -> ok s2s_stream_features(Acc, Server) -> [] set_presence_hook(User, Server, Resource, Presence) -> ok sm_register_connection_hook(SID, JID, Info) -> ok sm_remove_connection_hook(SID, JID, Info) -> ok unset_presence_hook(User, Server, Resource, Status) -> ok user_available_hook(JID) -> ok user_ping_timeout(JID) -> ok user_receive_packet(Packet, C2SState, JID, From, To) -> Packet user_send_packet(Packet, C2SState, From, To) -> Packet vcard_set(User, Server, VCARD) -> ok webadmin_menu_host(Acc, Host, Lang) -> [] webadmin_menu_hostnode(Acc, Host, Node, Lang) -> [] webadmin_user(Acc, User, Server, Lang) -> [] webadmin_user_parse_query(Acc, Action, User, Server, Query) -> [] Hooks parameters data types To = From = JID = ServerJID = #jid (see jlib.h) Packet = Payload = {xmlelement, Name, Attrs, SubEl} IQ = #iq (see jlib.h) Error = ?STANZA_ERROR/3 (see jlib.h) Lang = binary() Dir = in | out Auth = allow | deny PrivacyList = OldPrivacyList = NewPrivacyList = none | #userlist CtlStatus = false | ?STATUS_SUCCESS | ?STATUS_ERROR | ?STATUS_USAGE | ?STATUS_BADRPC (see ejabberd_ctl.hrl) Adhoc = {result, I} | {error, Error} | empty Disco = {result, Items} | {error, Error} Items = Packet Arg = [string()] Node = [string()] ItemID = string() Route = {route, From, To, Packet} RosterItem = #roster (see mod_roster.hrl) Subscription = none | from | to | both | remove SubscriptionInType = subscribe | unsubscribe SubscriptionOutType = subscribed | unsubscribed Reason = binary() Groups = [string()] SimpleJID = FromSubscription = ToSubscription = {User, Server, Resource} User = binary() Server = binary() Resource = binary() Status = binary() SID = {Time, pid()} Time = {MegaSecs, Secs, MicroSecs} (see erlang:now/0) MegaSecs = Secs = MicroSecs = int() Acc = same type as the return type of the function ```