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xmpp.chapril.org-ejabberd/src/mod_roster.erl

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%%%----------------------------------------------------------------------
%%% File : mod_roster.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Roster management
%%% Created : 11 Dec 2002 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2018 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License along
%%% with this program; if not, write to the Free Software Foundation, Inc.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
%%% @doc Roster management (Mnesia storage).
%%%
%%% Includes support for XEP-0237: Roster Versioning.
%%% The roster versioning follows an all-or-nothing strategy:
%%% - If the version supplied by the client is the latest, return an empty response.
%%% - If not, return the entire new roster (with updated version string).
%%% Roster version is a hash digest of the entire roster.
%%% No additional data is stored in DB.
-module(mod_roster).
-protocol({xep, 237, '1.3'}).
-author('alexey@process-one.net').
-behaviour(gen_mod).
-export([start/2, stop/1, reload/3, process_iq/1, export/1,
import_info/0, process_local_iq/1, get_user_roster/2,
import/5, get_roster/2, push_item/3,
import_start/2, import_stop/2, is_subscribed/2,
c2s_self_presence/1, in_subscription/2,
out_subscription/1, set_items/3, remove_user/2,
get_jid_info/4, encode_item/1, webadmin_page/3,
webadmin_user/4, get_versioning_feature/2,
roster_versioning_enabled/1, roster_version/2,
mod_opt_type/1, mod_options/1, set_roster/1, del_roster/3,
depends/2]).
-include("logger.hrl").
-include("xmpp.hrl").
-include("mod_roster.hrl").
-include("ejabberd_http.hrl").
-include("ejabberd_web_admin.hrl").
-define(ROSTER_CACHE, roster_cache).
-define(ROSTER_ITEM_CACHE, roster_item_cache).
-define(ROSTER_VERSION_CACHE, roster_version_cache).
-export_type([subscription/0]).
-callback init(binary(), gen_mod:opts()) -> any().
-callback import(binary(), binary(), #roster{} | [binary()]) -> ok.
-callback read_roster_version(binary(), binary()) -> {ok, binary()} | error.
-callback write_roster_version(binary(), binary(), boolean(), binary()) -> any().
-callback get_roster(binary(), binary()) -> {ok, [#roster{}]} | error.
-callback get_roster_item(binary(), binary(), ljid()) -> {ok, #roster{}} | error.
-callback read_subscription_and_groups(binary(), binary(), ljid())
-> {ok, {subscription(), ask(), [binary()]}} | error.
-callback roster_subscribe(binary(), binary(), ljid(), #roster{}) -> any().
-callback transaction(binary(), function()) -> {atomic, any()} | {aborted, any()}.
-callback remove_user(binary(), binary()) -> any().
-callback update_roster(binary(), binary(), ljid(), #roster{}) -> any().
-callback del_roster(binary(), binary(), ljid()) -> any().
-callback use_cache(binary(), roster | roster_version) -> boolean().
-callback cache_nodes(binary()) -> [node()].
-optional_callbacks([use_cache/2, cache_nodes/1]).
start(Host, Opts) ->
Mod = gen_mod:db_mod(Host, Opts, ?MODULE),
Mod:init(Host, Opts),
init_cache(Mod, Host, Opts),
ejabberd_hooks:add(roster_get, Host, ?MODULE,
get_user_roster, 50),
ejabberd_hooks:add(roster_in_subscription, Host,
?MODULE, in_subscription, 50),
ejabberd_hooks:add(roster_out_subscription, Host,
?MODULE, out_subscription, 50),
ejabberd_hooks:add(roster_get_jid_info, Host, ?MODULE,
get_jid_info, 50),
ejabberd_hooks:add(remove_user, Host, ?MODULE,
remove_user, 50),
ejabberd_hooks:add(c2s_self_presence, Host, ?MODULE,
c2s_self_presence, 50),
ejabberd_hooks:add(c2s_post_auth_features, Host,
?MODULE, get_versioning_feature, 50),
ejabberd_hooks:add(webadmin_page_host, Host, ?MODULE,
webadmin_page, 50),
ejabberd_hooks:add(webadmin_user, Host, ?MODULE,
webadmin_user, 50),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
?NS_ROSTER, ?MODULE, process_iq).
stop(Host) ->
ejabberd_hooks:delete(roster_get, Host, ?MODULE,
get_user_roster, 50),
ejabberd_hooks:delete(roster_in_subscription, Host,
?MODULE, in_subscription, 50),
ejabberd_hooks:delete(roster_out_subscription, Host,
?MODULE, out_subscription, 50),
ejabberd_hooks:delete(roster_get_jid_info, Host,
?MODULE, get_jid_info, 50),
ejabberd_hooks:delete(remove_user, Host, ?MODULE,
remove_user, 50),
ejabberd_hooks:delete(c2s_self_presence, Host, ?MODULE,
c2s_self_presence, 50),
ejabberd_hooks:delete(c2s_post_auth_features,
Host, ?MODULE, get_versioning_feature, 50),
ejabberd_hooks:delete(webadmin_page_host, Host, ?MODULE,
webadmin_page, 50),
ejabberd_hooks:delete(webadmin_user, Host, ?MODULE,
webadmin_user, 50),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host,
?NS_ROSTER).
reload(Host, NewOpts, OldOpts) ->
NewMod = gen_mod:db_mod(Host, NewOpts, ?MODULE),
OldMod = gen_mod:db_mod(Host, OldOpts, ?MODULE),
if NewMod /= OldMod ->
NewMod:init(Host, NewOpts);
true ->
ok
end.
depends(_Host, _Opts) ->
[].
process_iq(#iq{from = #jid{luser = U, lserver = S},
to = #jid{luser = U, lserver = S}} = IQ) ->
process_local_iq(IQ);
process_iq(#iq{lang = Lang, to = To} = IQ) ->
case ejabberd_hooks:run_fold(roster_remote_access,
To#jid.lserver, false, [IQ]) of
false ->
Txt = <<"Query to another users is forbidden">>,
xmpp:make_error(IQ, xmpp:err_forbidden(Txt, Lang));
true ->
process_local_iq(IQ)
end.
process_local_iq(#iq{type = set,lang = Lang,
sub_els = [#roster_query{
items = [#roster_item{ask = Ask}]}]} = IQ)
when Ask /= undefined ->
Txt = <<"Possessing 'ask' attribute is not allowed by RFC6121">>,
xmpp:make_error(IQ, xmpp:err_bad_request(Txt, Lang));
process_local_iq(#iq{type = set, from = From, lang = Lang,
sub_els = [#roster_query{
items = [#roster_item{} = Item]}]} = IQ) ->
case has_duplicated_groups(Item#roster_item.groups) of
true ->
Txt = <<"Duplicated groups are not allowed by RFC6121">>,
xmpp:make_error(IQ, xmpp:err_bad_request(Txt, Lang));
false ->
#jid{lserver = LServer} = From,
Access = gen_mod:get_module_opt(LServer, ?MODULE, access),
case acl:match_rule(LServer, Access, From) of
deny ->
Txt = <<"Access denied by service policy">>,
xmpp:make_error(IQ, xmpp:err_not_allowed(Txt, Lang));
allow ->
process_iq_set(IQ)
end
end;
process_local_iq(#iq{type = set, lang = Lang,
sub_els = [#roster_query{items = [_|_]}]} = IQ) ->
Txt = <<"Multiple <item/> elements are not allowed by RFC6121">>,
xmpp:make_error(IQ, xmpp:err_bad_request(Txt, Lang));
process_local_iq(#iq{type = get, lang = Lang,
sub_els = [#roster_query{items = Items}]} = IQ) ->
case Items of
[] ->
process_iq_get(IQ);
[_|_] ->
Txt = <<"The query must not contain <item/> elements">>,
xmpp:make_error(IQ, xmpp:err_bad_request(Txt, Lang))
end;
process_local_iq(#iq{lang = Lang} = IQ) ->
Txt = <<"No module is handling this query">>,
xmpp:make_error(IQ, xmpp:err_service_unavailable(Txt, Lang)).
roster_hash(Items) ->
str:sha(term_to_binary(lists:sort([R#roster{groups =
lists:sort(Grs)}
|| R = #roster{groups = Grs}
<- Items]))).
roster_versioning_enabled(Host) ->
gen_mod:get_module_opt(Host, ?MODULE, versioning).
roster_version_on_db(Host) ->
gen_mod:get_module_opt(Host, ?MODULE, store_current_id).
%% Returns a list that may contain an xmlelement with the XEP-237 feature if it's enabled.
-spec get_versioning_feature([xmpp_element()], binary()) -> [xmpp_element()].
get_versioning_feature(Acc, Host) ->
case gen_mod:is_loaded(Host, ?MODULE) of
true ->
case roster_versioning_enabled(Host) of
true ->
[#rosterver_feature{}|Acc];
false ->
Acc
end;
false ->
Acc
end.
roster_version(LServer, LUser) ->
US = {LUser, LServer},
case roster_version_on_db(LServer) of
true ->
case read_roster_version(LUser, LServer) of
error -> not_found;
{ok, V} -> V
end;
false ->
roster_hash(ejabberd_hooks:run_fold(roster_get, LServer,
[], [US]))
end.
read_roster_version(LUser, LServer) ->
ets_cache:lookup(
?ROSTER_VERSION_CACHE, {LUser, LServer},
fun() ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:read_roster_version(LUser, LServer)
end).
write_roster_version(LUser, LServer) ->
write_roster_version(LUser, LServer, false).
write_roster_version_t(LUser, LServer) ->
write_roster_version(LUser, LServer, true).
write_roster_version(LUser, LServer, InTransaction) ->
Ver = str:sha(term_to_binary(p1_time_compat:unique_integer())),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:write_roster_version(LUser, LServer, InTransaction, Ver),
if InTransaction -> ok;
true ->
ets_cache:delete(?ROSTER_VERSION_CACHE, {LUser, LServer},
cache_nodes(Mod, LServer))
end,
Ver.
%% Load roster from DB only if necessary.
%% It is necessary if
%% - roster versioning is disabled in server OR
%% - roster versioning is not used by the client OR
%% - roster versioning is used by server and client, BUT the server isn't storing versions on db OR
%% - the roster version from client don't match current version.
process_iq_get(#iq{to = To, lang = Lang,
sub_els = [#roster_query{ver = RequestedVersion}]} = IQ) ->
LUser = To#jid.luser,
LServer = To#jid.lserver,
US = {LUser, LServer},
try {ItemsToSend, VersionToSend} =
case {roster_versioning_enabled(LServer),
roster_version_on_db(LServer)} of
{true, true} when RequestedVersion /= undefined ->
case read_roster_version(LUser, LServer) of
error ->
RosterVersion = write_roster_version(LUser, LServer),
{lists:map(fun encode_item/1,
ejabberd_hooks:run_fold(
roster_get, To#jid.lserver, [], [US])),
RosterVersion};
{ok, RequestedVersion} ->
{false, false};
{ok, NewVersion} ->
{lists:map(fun encode_item/1,
ejabberd_hooks:run_fold(
roster_get, To#jid.lserver, [], [US])),
NewVersion}
end;
{true, false} when RequestedVersion /= undefined ->
RosterItems = ejabberd_hooks:run_fold(
roster_get, To#jid.lserver, [], [US]),
case roster_hash(RosterItems) of
RequestedVersion ->
{false, false};
New ->
{lists:map(fun encode_item/1, RosterItems), New}
end;
_ ->
{lists:map(fun encode_item/1,
ejabberd_hooks:run_fold(
roster_get, To#jid.lserver, [], [US])),
false}
end,
xmpp:make_iq_result(
IQ,
case {ItemsToSend, VersionToSend} of
{false, false} ->
undefined;
{Items, false} ->
#roster_query{items = Items};
{Items, Version} ->
#roster_query{items = Items,
ver = Version}
end)
catch E:R ->
?ERROR_MSG("failed to process roster get for ~s: ~p",
[jid:encode(To), {E, {R, erlang:get_stacktrace()}}]),
Txt = <<"Roster module has failed">>,
xmpp:make_error(IQ, xmpp:err_internal_server_error(Txt, Lang))
end.
-spec get_user_roster([#roster{}], {binary(), binary()}) -> [#roster{}].
get_user_roster(Acc, {LUser, LServer}) ->
Items = get_roster(LUser, LServer),
lists:filter(fun (#roster{subscription = none,
ask = in}) ->
false;
(_) -> true
end,
Items)
++ Acc.
get_roster(LUser, LServer) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
R = case use_cache(Mod, LServer, roster) of
true ->
ets_cache:lookup(
?ROSTER_CACHE, {LUser, LServer},
fun() -> Mod:get_roster(LUser, LServer) end);
false ->
Mod:get_roster(LUser, LServer)
end,
case R of
{ok, Items} -> Items;
error -> []
end.
get_roster_item(LUser, LServer, LJID) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
case Mod:get_roster_item(LUser, LServer, LJID) of
{ok, Item} ->
Item;
error ->
LBJID = jid:remove_resource(LJID),
#roster{usj = {LUser, LServer, LBJID},
us = {LUser, LServer}, jid = LBJID}
end.
get_subscription_and_groups(LUser, LServer, LJID) ->
LBJID = jid:remove_resource(LJID),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Res = case use_cache(Mod, LServer, roster) of
true ->
ets_cache:lookup(
?ROSTER_ITEM_CACHE, {LUser, LServer, LBJID},
fun() ->
Items = get_roster(LUser, LServer),
case lists:keyfind(LBJID, #roster.jid, Items) of
#roster{subscription = Sub,
ask = Ask,
groups = Groups} ->
{ok, {Sub, Ask, Groups}};
false ->
error
end
end);
false ->
case Mod:read_subscription_and_groups(LUser, LServer, LBJID) of
{ok, {Sub, Groups}} ->
%% Backward compatibility for third-party backends
{ok, {Sub, none, Groups}};
Other ->
Other
end
end,
case Res of
{ok, SubAndGroups} ->
SubAndGroups;
error ->
{none, none, []}
end.
set_roster(#roster{us = {LUser, LServer}, jid = LJID} = Item) ->
transaction(
LUser, LServer, [LJID],
fun() ->
update_roster_t(LUser, LServer, LJID, Item)
end).
del_roster(LUser, LServer, LJID) ->
transaction(
LUser, LServer, [LJID],
fun() ->
del_roster_t(LUser, LServer, LJID)
end).
encode_item(Item) ->
#roster_item{jid = jid:make(Item#roster.jid),
name = Item#roster.name,
subscription = Item#roster.subscription,
ask = case ask_to_pending(Item#roster.ask) of
out -> subscribe;
both -> subscribe;
_ -> undefined
end,
groups = Item#roster.groups}.
decode_item(#roster_item{subscription = remove} = Item, R, _) ->
R#roster{jid = jid:tolower(Item#roster_item.jid),
name = <<"">>,
subscription = remove,
ask = none,
groups = [],
askmessage = <<"">>,
xs = []};
decode_item(Item, R, Managed) ->
R#roster{jid = jid:tolower(Item#roster_item.jid),
name = Item#roster_item.name,
subscription = case Item#roster_item.subscription of
Sub when Managed -> Sub;
_ -> R#roster.subscription
end,
groups = Item#roster_item.groups}.
process_iq_set(#iq{from = _From, to = To,
sub_els = [#roster_query{items = [QueryItem]}]} = IQ) ->
#jid{luser = LUser, lserver = LServer} = To,
LJID = jid:tolower(QueryItem#roster_item.jid),
F = fun () ->
Item = get_roster_item(LUser, LServer, LJID),
Item2 = decode_item(QueryItem, Item, false),
Item3 = ejabberd_hooks:run_fold(roster_process_item,
LServer, Item2,
[LServer]),
case Item3#roster.subscription of
remove -> del_roster_t(LUser, LServer, LJID);
_ -> update_roster_t(LUser, LServer, LJID, Item3)
end,
case roster_version_on_db(LServer) of
true -> write_roster_version_t(LUser, LServer);
false -> ok
end,
{Item, Item3}
end,
case transaction(LUser, LServer, [LJID], F) of
{atomic, {OldItem, Item}} ->
push_item(To, OldItem, Item),
case Item#roster.subscription of
remove ->
send_unsubscribing_presence(To, OldItem);
_ ->
ok
end,
xmpp:make_iq_result(IQ);
E ->
?ERROR_MSG("roster set failed:~nIQ = ~s~nError = ~p",
[xmpp:pp(IQ), E]),
xmpp:make_error(IQ, xmpp:err_internal_server_error())
end.
push_item(To, OldItem, NewItem) ->
#jid{luser = LUser, lserver = LServer} = To,
Ver = case roster_versioning_enabled(LServer) of
true -> roster_version(LServer, LUser);
false -> undefined
end,
lists:foreach(
fun(Resource) ->
To1 = jid:replace_resource(To, Resource),
push_item(To1, OldItem, NewItem, Ver)
end, ejabberd_sm:get_user_resources(LUser, LServer)).
push_item(To, OldItem, NewItem, Ver) ->
route_presence_change(To, OldItem, NewItem),
IQ = #iq{type = set, to = To,
from = jid:remove_resource(To),
id = <<"push", (randoms:get_string())/binary>>,
sub_els = [#roster_query{ver = Ver,
items = [encode_item(NewItem)]}]},
ejabberd_router:route(IQ).
-spec route_presence_change(jid(), #roster{}, #roster{}) -> ok.
route_presence_change(From, OldItem, NewItem) ->
OldSub = OldItem#roster.subscription,
NewSub = NewItem#roster.subscription,
To = jid:make(NewItem#roster.jid),
NewIsFrom = NewSub == both orelse NewSub == from,
OldIsFrom = OldSub == both orelse OldSub == from,
if NewIsFrom andalso not OldIsFrom ->
case ejabberd_sm:get_session_pid(
From#jid.luser, From#jid.lserver, From#jid.lresource) of
none ->
ok;
Pid ->
ejabberd_c2s:resend_presence(Pid, To)
end;
OldIsFrom andalso not NewIsFrom ->
PU = #presence{from = From, to = To, type = unavailable},
case ejabberd_hooks:run_fold(
privacy_check_packet, allow,
[From, PU, out]) of
deny ->
ok;
allow ->
ejabberd_router:route(PU)
end;
true ->
ok
end.
ask_to_pending(subscribe) -> out;
ask_to_pending(unsubscribe) -> none;
ask_to_pending(Ask) -> Ask.
roster_subscribe_t(LUser, LServer, LJID, Item) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:roster_subscribe(LUser, LServer, LJID, Item).
transaction(LUser, LServer, LJIDs, F) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
case Mod:transaction(LServer, F) of
{atomic, _} = Result ->
delete_cache(Mod, LUser, LServer, LJIDs),
Result;
Err ->
Err
end.
-spec in_subscription(boolean(), presence()) -> boolean().
in_subscription(_, #presence{from = JID, to = To,
type = Type, status = Status}) ->
#jid{user = User, server = Server} = To,
Reason = if Type == subscribe -> xmpp:get_text(Status);
true -> <<"">>
end,
process_subscription(in, User, Server, JID, Type,
Reason).
-spec out_subscription(presence()) -> boolean().
out_subscription(#presence{from = From, to = JID, type = Type}) ->
#jid{user = User, server = Server} = From,
process_subscription(out, User, Server, JID, Type, <<"">>).
process_subscription(Direction, User, Server, JID1,
Type, Reason) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LJID = jid:tolower(jid:remove_resource(JID1)),
F = fun () ->
Item = get_roster_item(LUser, LServer, LJID),
NewState = case Direction of
out ->
out_state_change(Item#roster.subscription,
Item#roster.ask, Type);
in ->
in_state_change(Item#roster.subscription,
Item#roster.ask, Type)
end,
AutoReply = case Direction of
out -> none;
in ->
in_auto_reply(Item#roster.subscription,
Item#roster.ask, Type)
end,
AskMessage = case NewState of
{_, both} -> Reason;
{_, in} -> Reason;
_ -> <<"">>
end,
case NewState of
none ->
{none, AutoReply};
{none, none} when Item#roster.subscription == none,
Item#roster.ask == in ->
del_roster_t(LUser, LServer, LJID), {none, AutoReply};
{Subscription, Pending} ->
NewItem = Item#roster{subscription = Subscription,
ask = Pending,
askmessage = AskMessage},
roster_subscribe_t(LUser, LServer, LJID, NewItem),
case roster_version_on_db(LServer) of
true -> write_roster_version_t(LUser, LServer);
false -> ok
end,
{{push, Item, NewItem}, AutoReply}
end
end,
case transaction(LUser, LServer, [LJID], F) of
{atomic, {Push, AutoReply}} ->
case AutoReply of
none -> ok;
_ ->
ejabberd_router:route(
#presence{type = AutoReply,
from = jid:make(User, Server),
to = JID1})
end,
case Push of
{push, OldItem, NewItem} ->
if NewItem#roster.subscription == none,
NewItem#roster.ask == in ->
ok;
true ->
push_item(jid:make(User, Server), OldItem, NewItem)
end,
true;
none ->
false
end;
_ ->
false
end.
%% in_state_change(Subscription, Pending, Type) -> NewState
%% NewState = none | {NewSubscription, NewPending}
-ifdef(ROSTER_GATEWAY_WORKAROUND).
-define(NNSD, {to, none}).
-define(NISD, {to, in}).
-else.
-define(NNSD, none).
-define(NISD, none).
-endif.
in_state_change(none, none, subscribe) -> {none, in};
in_state_change(none, none, subscribed) -> ?NNSD;
in_state_change(none, none, unsubscribe) -> none;
in_state_change(none, none, unsubscribed) -> none;
in_state_change(none, out, subscribe) -> {none, both};
in_state_change(none, out, subscribed) -> {to, none};
in_state_change(none, out, unsubscribe) -> none;
in_state_change(none, out, unsubscribed) ->
{none, none};
in_state_change(none, in, subscribe) -> none;
in_state_change(none, in, subscribed) -> ?NISD;
in_state_change(none, in, unsubscribe) -> {none, none};
in_state_change(none, in, unsubscribed) -> none;
in_state_change(none, both, subscribe) -> none;
in_state_change(none, both, subscribed) -> {to, in};
in_state_change(none, both, unsubscribe) -> {none, out};
in_state_change(none, both, unsubscribed) -> {none, in};
in_state_change(to, none, subscribe) -> {to, in};
in_state_change(to, none, subscribed) -> none;
in_state_change(to, none, unsubscribe) -> none;
in_state_change(to, none, unsubscribed) -> {none, none};
in_state_change(to, in, subscribe) -> none;
in_state_change(to, in, subscribed) -> none;
in_state_change(to, in, unsubscribe) -> {to, none};
in_state_change(to, in, unsubscribed) -> {none, in};
in_state_change(from, none, subscribe) -> none;
in_state_change(from, none, subscribed) -> {both, none};
in_state_change(from, none, unsubscribe) ->
{none, none};
in_state_change(from, none, unsubscribed) -> none;
in_state_change(from, out, subscribe) -> none;
in_state_change(from, out, subscribed) -> {both, none};
in_state_change(from, out, unsubscribe) -> {none, out};
in_state_change(from, out, unsubscribed) ->
{from, none};
in_state_change(both, none, subscribe) -> none;
in_state_change(both, none, subscribed) -> none;
in_state_change(both, none, unsubscribe) -> {to, none};
in_state_change(both, none, unsubscribed) ->
{from, none}.
out_state_change(none, none, subscribe) -> {none, out};
out_state_change(none, none, subscribed) -> none;
out_state_change(none, none, unsubscribe) -> none;
out_state_change(none, none, unsubscribed) -> none;
out_state_change(none, out, subscribe) ->
{none,
out}; %% We need to resend query (RFC3921, section 9.2)
out_state_change(none, out, subscribed) -> none;
out_state_change(none, out, unsubscribe) ->
{none, none};
out_state_change(none, out, unsubscribed) -> none;
out_state_change(none, in, subscribe) -> {none, both};
out_state_change(none, in, subscribed) -> {from, none};
out_state_change(none, in, unsubscribe) -> none;
out_state_change(none, in, unsubscribed) ->
{none, none};
out_state_change(none, both, subscribe) -> none;
out_state_change(none, both, subscribed) -> {from, out};
out_state_change(none, both, unsubscribe) -> {none, in};
out_state_change(none, both, unsubscribed) ->
{none, out};
out_state_change(to, none, subscribe) -> none;
out_state_change(to, none, subscribed) -> {both, none};
out_state_change(to, none, unsubscribe) -> {none, none};
out_state_change(to, none, unsubscribed) -> none;
out_state_change(to, in, subscribe) -> none;
out_state_change(to, in, subscribed) -> {both, none};
out_state_change(to, in, unsubscribe) -> {none, in};
out_state_change(to, in, unsubscribed) -> {to, none};
out_state_change(from, none, subscribe) -> {from, out};
out_state_change(from, none, subscribed) -> none;
out_state_change(from, none, unsubscribe) -> none;
out_state_change(from, none, unsubscribed) ->
{none, none};
out_state_change(from, out, subscribe) -> none;
out_state_change(from, out, subscribed) -> none;
out_state_change(from, out, unsubscribe) ->
{from, none};
out_state_change(from, out, unsubscribed) ->
{none, out};
out_state_change(both, none, subscribe) -> none;
out_state_change(both, none, subscribed) -> none;
out_state_change(both, none, unsubscribe) ->
{from, none};
out_state_change(both, none, unsubscribed) ->
{to, none}.
in_auto_reply(from, none, subscribe) -> subscribed;
in_auto_reply(from, out, subscribe) -> subscribed;
in_auto_reply(both, none, subscribe) -> subscribed;
in_auto_reply(none, in, unsubscribe) -> unsubscribed;
in_auto_reply(none, both, unsubscribe) -> unsubscribed;
in_auto_reply(to, in, unsubscribe) -> unsubscribed;
in_auto_reply(from, none, unsubscribe) -> unsubscribed;
in_auto_reply(from, out, unsubscribe) -> unsubscribed;
in_auto_reply(both, none, unsubscribe) -> unsubscribed;
in_auto_reply(_, _, _) -> none.
-spec remove_user(binary(), binary()) -> ok.
remove_user(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Items = get_user_roster([], {LUser, LServer}),
send_unsubscription_to_rosteritems(LUser, LServer, Items),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:remove_user(LUser, LServer),
delete_cache(Mod, LUser, LServer, [Item#roster.jid || Item <- Items]).
%% For each contact with Subscription:
%% Both or From, send a "unsubscribed" presence stanza;
%% Both or To, send a "unsubscribe" presence stanza.
send_unsubscription_to_rosteritems(LUser, LServer, RosterItems) ->
From = jid:make({LUser, LServer, <<"">>}),
lists:foreach(fun (RosterItem) ->
send_unsubscribing_presence(From, RosterItem)
end,
RosterItems).
send_unsubscribing_presence(From, Item) ->
IsTo = case Item#roster.subscription of
both -> true;
to -> true;
_ -> false
end,
IsFrom = case Item#roster.subscription of
both -> true;
from -> true;
_ -> false
end,
if IsTo ->
ejabberd_router:route(
#presence{type = unsubscribe,
from = jid:remove_resource(From),
to = jid:make(Item#roster.jid)});
true -> ok
end,
if IsFrom ->
ejabberd_router:route(
#presence{type = unsubscribed,
from = jid:remove_resource(From),
to = jid:make(Item#roster.jid)});
true -> ok
end,
ok.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec set_items(binary(), binary(), roster_query()) -> any().
set_items(User, Server, #roster_query{items = Items}) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LJIDs = [jid:tolower(Item#roster_item.jid) || Item <- Items],
F = fun () ->
lists:foreach(
fun(Item) ->
process_item_set_t(LUser, LServer, Item)
end, Items)
end,
transaction(LUser, LServer, LJIDs, F).
update_roster_t(LUser, LServer, LJID, Item) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:update_roster(LUser, LServer, LJID, Item).
del_roster_t(LUser, LServer, LJID) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:del_roster(LUser, LServer, LJID).
process_item_set_t(LUser, LServer, #roster_item{jid = JID1} = QueryItem) ->
JID = {JID1#jid.user, JID1#jid.server, <<>>},
LJID = {JID1#jid.luser, JID1#jid.lserver, <<>>},
Item = #roster{usj = {LUser, LServer, LJID},
us = {LUser, LServer}, jid = JID},
Item2 = decode_item(QueryItem, Item, _Managed = true),
case Item2#roster.subscription of
remove -> del_roster_t(LUser, LServer, LJID);
_ -> update_roster_t(LUser, LServer, LJID, Item2)
end;
process_item_set_t(_LUser, _LServer, _) -> ok.
-spec c2s_self_presence({presence(), ejabberd_c2s:state()})
-> {presence(), ejabberd_c2s:state()}.
c2s_self_presence({_, #{pres_last := _}} = Acc) ->
Acc;
c2s_self_presence({#presence{type = available} = Pkt, State}) ->
Prio = get_priority_from_presence(Pkt),
if Prio >= 0 ->
State1 = resend_pending_subscriptions(State),
{Pkt, State1};
true ->
{Pkt, State}
end;
c2s_self_presence(Acc) ->
Acc.
-spec resend_pending_subscriptions(ejabberd_c2s:state()) -> ejabberd_c2s:state().
resend_pending_subscriptions(#{jid := JID} = State) ->
BareJID = jid:remove_resource(JID),
Result = get_roster(JID#jid.luser, JID#jid.lserver),
lists:foldl(
fun(#roster{ask = Ask} = R, AccState) when Ask == in; Ask == both ->
Message = R#roster.askmessage,
Status = if is_binary(Message) -> (Message);
true -> <<"">>
end,
Sub = #presence{from = jid:make(R#roster.jid),
to = BareJID,
type = subscribe,
status = xmpp:mk_text(Status)},
ejabberd_c2s:send(AccState, Sub);
(_, AccState) ->
AccState
end, State, Result).
-spec get_priority_from_presence(presence()) -> integer().
get_priority_from_presence(#presence{priority = Prio}) ->
case Prio of
undefined -> 0;
_ -> Prio
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec get_jid_info({subscription(), ask(), [binary()]}, binary(), binary(), jid())
-> {subscription(), ask(), [binary()]}.
get_jid_info(_, User, Server, JID) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LJID = jid:tolower(JID),
get_subscription_and_groups(LUser, LServer, LJID).
%% Check if `From` is subscriberd to `To`s presence
%% note 1: partial subscriptions are also considered, i.e.
%% `To` has already sent a subscription request to `From`
%% note 2: it's assumed a user is subscribed to self
%% note 3: `To` MUST be a local user, `From` can be any user
-spec is_subscribed(jid(), jid()) -> boolean().
is_subscribed(#jid{luser = LUser, lserver = LServer},
#jid{luser = LUser, lserver = LServer}) ->
true;
is_subscribed(From, #jid{luser = LUser, lserver = LServer}) ->
{Sub, Ask, _} = ejabberd_hooks:run_fold(
roster_get_jid_info, LServer,
{none, none, []},
[LUser, LServer, From]),
(Sub /= none) orelse (Ask == subscribe)
orelse (Ask == out) orelse (Ask == both).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
webadmin_page(_, Host,
#request{us = _US, path = [<<"user">>, U, <<"roster">>],
q = Query, lang = Lang} =
_Request) ->
Res = user_roster(U, Host, Query, Lang), {stop, Res};
webadmin_page(Acc, _, _) -> Acc.
user_roster(User, Server, Query, Lang) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
US = {LUser, LServer},
Items1 = get_roster(LUser, LServer),
Res = user_roster_parse_query(User, Server, Items1,
Query),
Items = get_roster(LUser, LServer),
SItems = lists:sort(Items),
FItems = case SItems of
[] -> [?CT(<<"None">>)];
_ ->
[?XE(<<"table">>,
[?XE(<<"thead">>,
[?XE(<<"tr">>,
[?XCT(<<"td">>, <<"Jabber ID">>),
?XCT(<<"td">>, <<"Nickname">>),
?XCT(<<"td">>, <<"Subscription">>),
?XCT(<<"td">>, <<"Pending">>),
?XCT(<<"td">>, <<"Groups">>)])]),
?XE(<<"tbody">>,
(lists:map(fun (R) ->
Groups = lists:flatmap(fun
(Group) ->
[?C(Group),
?BR]
end,
R#roster.groups),
Pending =
ask_to_pending(R#roster.ask),
TDJID =
build_contact_jid_td(R#roster.jid),
?XE(<<"tr">>,
[TDJID,
?XAC(<<"td">>,
[{<<"class">>,
<<"valign">>}],
(R#roster.name)),
?XAC(<<"td">>,
[{<<"class">>,
<<"valign">>}],
(iolist_to_binary(atom_to_list(R#roster.subscription)))),
?XAC(<<"td">>,
[{<<"class">>,
<<"valign">>}],
(iolist_to_binary(atom_to_list(Pending)))),
?XAE(<<"td">>,
[{<<"class">>,
<<"valign">>}],
Groups),
if Pending == in ->
?XAE(<<"td">>,
[{<<"class">>,
<<"valign">>}],
[?INPUTT(<<"submit">>,
<<"validate",
(ejabberd_web_admin:term_to_id(R#roster.jid))/binary>>,
<<"Validate">>)]);
true -> ?X(<<"td">>)
end,
?XAE(<<"td">>,
[{<<"class">>,
<<"valign">>}],
[?INPUTT(<<"submit">>,
<<"remove",
(ejabberd_web_admin:term_to_id(R#roster.jid))/binary>>,
<<"Remove">>)])])
end,
SItems)))])]
end,
[?XC(<<"h1">>,
(<<(?T(<<"Roster of ">>))/binary, (us_to_list(US))/binary>>))]
++
case Res of
ok -> [?XREST(<<"Submitted">>)];
error -> [?XREST(<<"Bad format">>)];
nothing -> []
end
++
[?XAE(<<"form">>,
[{<<"action">>, <<"">>}, {<<"method">>, <<"post">>}],
(FItems ++
[?P, ?INPUT(<<"text">>, <<"newjid">>, <<"">>),
?C(<<" ">>),
?INPUTT(<<"submit">>, <<"addjid">>,
<<"Add Jabber ID">>)]))].
build_contact_jid_td(RosterJID) ->
ContactJID = jid:make(RosterJID),
JIDURI = case {ContactJID#jid.luser,
ContactJID#jid.lserver}
of
{<<"">>, _} -> <<"">>;
{CUser, CServer} ->
case lists:member(CServer, ejabberd_config:get_myhosts()) of
false -> <<"">>;
true ->
<<"/admin/server/", CServer/binary, "/user/",
CUser/binary, "/">>
end
end,
case JIDURI of
<<>> ->
?XAC(<<"td">>, [{<<"class">>, <<"valign">>}],
(jid:encode(RosterJID)));
URI when is_binary(URI) ->
?XAE(<<"td">>, [{<<"class">>, <<"valign">>}],
[?AC(JIDURI, (jid:encode(RosterJID)))])
end.
user_roster_parse_query(User, Server, Items, Query) ->
case lists:keysearch(<<"addjid">>, 1, Query) of
{value, _} ->
case lists:keysearch(<<"newjid">>, 1, Query) of
{value, {_, SJID}} ->
try jid:decode(SJID) of
JID ->
user_roster_subscribe_jid(User, Server, JID), ok
catch _:{bad_jid, _} ->
error
end;
false -> error
end;
false ->
case catch user_roster_item_parse_query(User, Server,
Items, Query)
of
submitted -> ok;
{'EXIT', _Reason} -> error;
_ -> nothing
end
end.
user_roster_subscribe_jid(User, Server, JID) ->
UJID = jid:make(User, Server),
Presence = #presence{from = UJID, to = JID, type = subscribe},
out_subscription(Presence),
ejabberd_router:route(Presence).
user_roster_item_parse_query(User, Server, Items,
Query) ->
lists:foreach(fun (R) ->
JID = R#roster.jid,
case lists:keysearch(<<"validate",
(ejabberd_web_admin:term_to_id(JID))/binary>>,
1, Query)
of
{value, _} ->
JID1 = jid:make(JID),
UJID = jid:make(User, Server),
Pres = #presence{from = UJID, to = JID1,
type = subscribed},
out_subscription(Pres),
ejabberd_router:route(Pres),
throw(submitted);
false ->
case lists:keysearch(<<"remove",
(ejabberd_web_admin:term_to_id(JID))/binary>>,
1, Query)
of
{value, _} ->
UJID = jid:make(User, Server),
RosterItem = #roster_item{
jid = jid:make(JID),
subscription = remove},
process_iq_set(
#iq{type = set,
from = UJID,
to = UJID,
id = randoms:get_string(),
sub_els = [#roster_query{
items = [RosterItem]}]}),
throw(submitted);
false -> ok
end
end
end,
Items),
nothing.
us_to_list({User, Server}) ->
jid:encode({User, Server, <<"">>}).
webadmin_user(Acc, _User, _Server, Lang) ->
Acc ++
[?XE(<<"h3">>, [?ACT(<<"roster/">>, <<"Roster">>)])].
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
has_duplicated_groups(Groups) ->
GroupsPrep = lists:usort([jid:resourceprep(G) || G <- Groups]),
not (length(GroupsPrep) == length(Groups)).
-spec init_cache(module(), binary(), gen_mod:opts()) -> ok.
init_cache(Mod, Host, Opts) ->
CacheOpts = cache_opts(Opts),
case use_cache(Mod, Host, roster_version) of
true ->
ets_cache:new(?ROSTER_VERSION_CACHE, CacheOpts);
false ->
ets_cache:delete(?ROSTER_VERSION_CACHE)
end,
case use_cache(Mod, Host, roster) of
true ->
ets_cache:new(?ROSTER_CACHE, CacheOpts),
ets_cache:new(?ROSTER_ITEM_CACHE, CacheOpts);
false ->
ets_cache:delete(?ROSTER_CACHE),
ets_cache:delete(?ROSTER_ITEM_CACHE)
end.
-spec cache_opts(gen_mod:opts()) -> [proplists:property()].
cache_opts(Opts) ->
MaxSize = gen_mod:get_opt(cache_size, Opts),
CacheMissed = gen_mod:get_opt(cache_missed, Opts),
LifeTime = case gen_mod:get_opt(cache_life_time, Opts) of
infinity -> infinity;
I -> timer:seconds(I)
end,
[{max_size, MaxSize}, {cache_missed, CacheMissed}, {life_time, LifeTime}].
-spec use_cache(module(), binary(), roster | roster_version) -> boolean().
use_cache(Mod, Host, Table) ->
case erlang:function_exported(Mod, use_cache, 2) of
true -> Mod:use_cache(Host, Table);
false -> gen_mod:get_module_opt(Host, ?MODULE, use_cache)
end.
-spec cache_nodes(module(), binary()) -> [node()].
cache_nodes(Mod, Host) ->
case erlang:function_exported(Mod, cache_nodes, 1) of
true -> Mod:cache_nodes(Host);
false -> ejabberd_cluster:get_nodes()
end.
-spec delete_cache(module(), binary(), binary(), [ljid()]) -> ok.
delete_cache(Mod, LUser, LServer, LJIDs) ->
case use_cache(Mod, LServer, roster_version) of
true ->
ets_cache:delete(?ROSTER_VERSION_CACHE, {LUser, LServer},
cache_nodes(Mod, LServer));
false ->
ok
end,
case use_cache(Mod, LServer, roster) of
true ->
Nodes = cache_nodes(Mod, LServer),
ets_cache:delete(?ROSTER_CACHE, {LUser, LServer}, Nodes),
lists:foreach(
fun(LJID) ->
ets_cache:delete(
?ROSTER_ITEM_CACHE,
{LUser, LServer, jid:remove_resource(LJID)},
Nodes)
end, LJIDs);
false ->
ok
end.
export(LServer) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:export(LServer).
import_info() ->
[{<<"roster_version">>, 2},
{<<"rostergroups">>, 3},
{<<"rosterusers">>, 10}].
import_start(LServer, DBType) ->
Mod = gen_mod:db_mod(DBType, ?MODULE),
ets:new(rostergroups_tmp, [private, named_table, bag]),
Mod:init(LServer, []),
ok.
import_stop(_LServer, _DBType) ->
ets:delete(rostergroups_tmp),
ok.
row_length() ->
case ejabberd_sql:use_new_schema() of
true -> 10;
false -> 9
end.
import(LServer, {sql, _}, _DBType, <<"rostergroups">>, [LUser, SJID, Group]) ->
LJID = jid:tolower(jid:decode(SJID)),
ets:insert(rostergroups_tmp, {{LUser, LServer, LJID}, Group}),
ok;
import(LServer, {sql, _}, DBType, <<"rosterusers">>, Row) ->
I = mod_roster_sql:raw_to_record(LServer, lists:sublist(Row, row_length())),
Groups = [G || {_, G} <- ets:lookup(rostergroups_tmp, I#roster.usj)],
RosterItem = I#roster{groups = Groups},
Mod = gen_mod:db_mod(DBType, ?MODULE),
Mod:import(LServer, <<"rosterusers">>, RosterItem);
import(LServer, {sql, _}, DBType, <<"roster_version">>, [LUser, Ver]) ->
Mod = gen_mod:db_mod(DBType, ?MODULE),
Mod:import(LServer, <<"roster_version">>, [LUser, Ver]).
mod_opt_type(access) ->
fun acl:access_rules_validator/1;
mod_opt_type(db_type) -> fun(T) -> ejabberd_config:v_db(?MODULE, T) end;
mod_opt_type(store_current_id) ->
fun (B) when is_boolean(B) -> B end;
mod_opt_type(versioning) ->
fun (B) when is_boolean(B) -> B end;
mod_opt_type(O) when O == cache_life_time; O == cache_size ->
fun (I) when is_integer(I), I > 0 -> I;
(infinity) -> infinity
end;
mod_opt_type(O) when O == use_cache; O == cache_missed ->
fun (B) when is_boolean(B) -> B end.
mod_options(Host) ->
[{access, all},
{store_current_id, false},
{versioning, false},
{db_type, ejabberd_config:default_db(Host, ?MODULE)},
{use_cache, ejabberd_config:use_cache(Host)},
{cache_size, ejabberd_config:cache_size(Host)},
{cache_missed, ejabberd_config:cache_missed(Host)},
{cache_life_time, ejabberd_config:cache_life_time(Host)}].
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