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xmpp.chapril.org-ejabberd/src/mod_shared_roster_ldap.erl
Evgeniy Khramtsov 4d8f770624 Switch to rebar build tool 
Use dynamic Rebar configuration
Make iconv dependency optional
Disable transient_supervisors compile option
Add hipe compilation support
Only compile ibrowse and lhttpc when needed
Make it possible to generate an OTP application release
Add --enable-debug compile option
Add --enable-all compiler option
Add --enable-tools configure option
Add --with-erlang configure option.
Add --enable-erlang-version-check configure option.
Add lager support
Improve the test suite
2013-06-13 11:11:02 +02:00

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%%%-------------------------------------------------------------------
%%% File : mod_shared_roster_ldap.erl
%%% Author : Realloc <realloc@realloc.spb.ru>
%%% Marcin Owsiany <marcin@owsiany.pl>
%%% Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%% Description : LDAP shared roster management
%%% Created : 5 Mar 2005 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2013 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., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%-------------------------------------------------------------------
-module(mod_shared_roster_ldap).
-behaviour(gen_server).
-behaviour(gen_mod).
%% API
-export([start_link/2, start/2, stop/1]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2,
handle_info/2, terminate/2, code_change/3]).
-export([get_user_roster/2, get_subscription_lists/3,
get_jid_info/4, process_item/2, in_subscription/6,
out_subscription/4]).
-include("ejabberd.hrl").
-include("logger.hrl").
-include("jlib.hrl").
-include("mod_roster.hrl").
-include("eldap.hrl").
-define(CACHE_SIZE, 1000).
-define(USER_CACHE_VALIDITY, 300).
-define(GROUP_CACHE_VALIDITY, 300).
-define(LDAP_SEARCH_TIMEOUT, 5).
-record(state,
{host = <<"">> :: binary(),
eldap_id = <<"">> :: binary(),
servers = [] :: [binary()],
backups = [] :: [binary()],
port = ?LDAP_PORT :: inet:port_number(),
tls_options = [] :: list(),
dn = <<"">> :: binary(),
base = <<"">> :: binary(),
password = <<"">> :: binary(),
uid = <<"">> :: binary(),
deref_aliases = never :: never | searching |
finding | always,
group_attr = <<"">> :: binary(),
group_desc = <<"">> :: binary(),
user_desc = <<"">> :: binary(),
user_uid = <<"">> :: binary(),
uid_format = <<"">> :: binary(),
uid_format_re = <<"">> :: binary(),
filter = <<"">> :: binary(),
ufilter = <<"">> :: binary(),
rfilter = <<"">> :: binary(),
gfilter = <<"">> :: binary(),
auth_check = true :: boolean(),
user_cache_size = ?CACHE_SIZE :: non_neg_integer(),
group_cache_size = ?CACHE_SIZE :: non_neg_integer(),
user_cache_validity = ?USER_CACHE_VALIDITY :: non_neg_integer(),
group_cache_validity = ?GROUP_CACHE_VALIDITY :: non_neg_integer()}).
-record(group_info, {desc, members}).
%%====================================================================
%% API
%%====================================================================
start_link(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?MODULE),
gen_server:start_link({local, Proc}, ?MODULE,
[Host, Opts], []).
start(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?MODULE),
ChildSpec = {Proc, {?MODULE, start_link, [Host, Opts]},
permanent, 1000, worker, [?MODULE]},
supervisor:start_child(ejabberd_sup, ChildSpec).
stop(Host) ->
Proc = gen_mod:get_module_proc(Host, ?MODULE),
supervisor:terminate_child(ejabberd_sup, Proc),
supervisor:delete_child(ejabberd_sup, Proc).
%%--------------------------------------------------------------------
%% Hooks
%%--------------------------------------------------------------------
get_user_roster(Items, {U, S} = US) ->
SRUsers = get_user_to_groups_map(US, true),
{NewItems1, SRUsersRest} = lists:mapfoldl(fun (Item,
SRUsers1) ->
{_, _, {U1, S1, _}} =
Item#roster.usj,
US1 = {U1, S1},
case dict:find(US1,
SRUsers1)
of
{ok, _GroupNames} ->
{Item#roster{subscription
=
both,
ask =
none},
dict:erase(US1,
SRUsers1)};
error ->
{Item, SRUsers1}
end
end,
SRUsers, Items),
SRItems = [#roster{usj = {U, S, {U1, S1, <<"">>}},
us = US, jid = {U1, S1, <<"">>},
name = get_user_name(U1, S1), subscription = both,
ask = none, groups = GroupNames}
|| {{U1, S1}, GroupNames} <- dict:to_list(SRUsersRest)],
SRItems ++ NewItems1.
%% This function in use to rewrite the roster entries when moving or renaming
%% them in the user contact list.
process_item(RosterItem, _Host) ->
USFrom = RosterItem#roster.us,
{User, Server, _Resource} = RosterItem#roster.jid,
USTo = {User, Server},
Map = get_user_to_groups_map(USFrom, false),
case dict:find(USTo, Map) of
error -> RosterItem;
{ok, []} -> RosterItem;
{ok, GroupNames}
when RosterItem#roster.subscription == remove ->
RosterItem#roster{subscription = both, ask = none,
groups = GroupNames};
_ -> RosterItem#roster{subscription = both, ask = none}
end.
get_subscription_lists({F, T}, User, Server) ->
LUser = jlib:nodeprep(User),
LServer = jlib:nameprep(Server),
US = {LUser, LServer},
DisplayedGroups = get_user_displayed_groups(US),
SRUsers = lists:usort(lists:flatmap(fun (Group) ->
get_group_users(LServer, Group)
end,
DisplayedGroups)),
SRJIDs = [{U1, S1, <<"">>} || {U1, S1} <- SRUsers],
{lists:usort(SRJIDs ++ F), lists:usort(SRJIDs ++ T)}.
get_jid_info({Subscription, Groups}, User, Server,
JID) ->
LUser = jlib:nodeprep(User),
LServer = jlib:nameprep(Server),
US = {LUser, LServer},
{U1, S1, _} = jlib:jid_tolower(JID),
US1 = {U1, S1},
SRUsers = get_user_to_groups_map(US, false),
case dict:find(US1, SRUsers) of
{ok, GroupNames} ->
NewGroups = if Groups == [] -> GroupNames;
true -> Groups
end,
{both, NewGroups};
error -> {Subscription, Groups}
end.
in_subscription(Acc, User, Server, JID, Type,
_Reason) ->
process_subscription(in, User, Server, JID, Type, Acc).
out_subscription(User, Server, JID, Type) ->
process_subscription(out, User, Server, JID, Type,
false).
process_subscription(Direction, User, Server, JID,
_Type, Acc) ->
LUser = jlib:nodeprep(User),
LServer = jlib:nameprep(Server),
US = {LUser, LServer},
{U1, S1, _} =
jlib:jid_tolower(jlib:jid_remove_resource(JID)),
US1 = {U1, S1},
DisplayedGroups = get_user_displayed_groups(US),
SRUsers = lists:usort(lists:flatmap(fun (Group) ->
get_group_users(LServer, Group)
end,
DisplayedGroups)),
case lists:member(US1, SRUsers) of
true ->
case Direction of
in -> {stop, false};
out -> stop
end;
false -> Acc
end.
%%====================================================================
%% gen_server callbacks
%%====================================================================
init([Host, Opts]) ->
State = parse_options(Host, Opts),
cache_tab:new(shared_roster_ldap_user,
[{max_size, State#state.user_cache_size}, {lru, false},
{life_time, State#state.user_cache_validity}]),
cache_tab:new(shared_roster_ldap_group,
[{max_size, State#state.group_cache_size}, {lru, false},
{life_time, State#state.group_cache_validity}]),
ejabberd_hooks:add(roster_get, Host, ?MODULE,
get_user_roster, 70),
ejabberd_hooks:add(roster_in_subscription, Host,
?MODULE, in_subscription, 30),
ejabberd_hooks:add(roster_out_subscription, Host,
?MODULE, out_subscription, 30),
ejabberd_hooks:add(roster_get_subscription_lists, Host,
?MODULE, get_subscription_lists, 70),
ejabberd_hooks:add(roster_get_jid_info, Host, ?MODULE,
get_jid_info, 70),
ejabberd_hooks:add(roster_process_item, Host, ?MODULE,
process_item, 50),
eldap_pool:start_link(State#state.eldap_id,
State#state.servers, State#state.backups,
State#state.port, State#state.dn,
State#state.password, State#state.tls_options),
{ok, State}.
handle_call(get_state, _From, State) ->
{reply, {ok, State}, State};
handle_call(_Request, _From, State) ->
{reply, {error, badarg}, State}.
handle_cast(_Msg, State) -> {noreply, State}.
handle_info(_Info, State) -> {noreply, State}.
terminate(_Reason, State) ->
Host = State#state.host,
ejabberd_hooks:delete(roster_get, Host, ?MODULE,
get_user_roster, 70),
ejabberd_hooks:delete(roster_in_subscription, Host,
?MODULE, in_subscription, 30),
ejabberd_hooks:delete(roster_out_subscription, Host,
?MODULE, out_subscription, 30),
ejabberd_hooks:delete(roster_get_subscription_lists,
Host, ?MODULE, get_subscription_lists, 70),
ejabberd_hooks:delete(roster_get_jid_info, Host,
?MODULE, get_jid_info, 70),
ejabberd_hooks:delete(roster_process_item, Host,
?MODULE, process_item, 50).
code_change(_OldVsn, State, _Extra) -> {ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
%% For a given user, map all his shared roster contacts to groups they are
%% members of. Skip the user himself iff SkipUS is true.
get_user_to_groups_map({_, Server} = US, SkipUS) ->
DisplayedGroups = get_user_displayed_groups(US),
%% Pass given FilterParseArgs to eldap_filter:parse, and if successful, run and
%% return the resulting filter, retrieving given AttributesList. Return the
%% result entries. On any error silently return an empty list of results.
%%
%% Eldap server ID and base DN for the query are both retrieved from the State
%% record.
lists:foldl(fun (Group, Dict1) ->
GroupName = get_group_name(Server, Group),
lists:foldl(fun (Contact, Dict) ->
if SkipUS, Contact == US -> Dict;
true ->
dict:append(Contact,
GroupName, Dict)
end
end,
Dict1, get_group_users(Server, Group))
end,
dict:new(), DisplayedGroups).
eldap_search(State, FilterParseArgs, AttributesList) ->
case apply(eldap_filter, parse, FilterParseArgs) of
{ok, EldapFilter} ->
case eldap_pool:search(State#state.eldap_id,
[{base, State#state.base},
{filter, EldapFilter},
{timeout, ?LDAP_SEARCH_TIMEOUT},
{deref_aliases, State#state.deref_aliases},
{attributes, AttributesList}])
of
#eldap_search_result{entries = Es} ->
%% A result with entries. Return their list.
Es;
_ ->
%% Something else. Pretend we got no results.
[]
end;
_ ->
%% Filter parsing failed. Pretend we got no results.
[]
end.
get_user_displayed_groups({User, Host}) ->
{ok, State} = eldap_utils:get_state(Host, ?MODULE),
GroupAttr = State#state.group_attr,
Entries = eldap_search(State,
[eldap_filter:do_sub(State#state.rfilter,
[{<<"%u">>, User}])],
[GroupAttr]),
Reply = lists:flatmap(fun (#eldap_entry{attributes =
Attrs}) ->
case Attrs of
[{GroupAttr, ValuesList}] -> ValuesList;
_ -> []
end
end,
Entries),
lists:usort(Reply).
get_group_users(Host, Group) ->
{ok, State} = eldap_utils:get_state(Host, ?MODULE),
case cache_tab:dirty_lookup(shared_roster_ldap_group,
{Group, Host},
fun () -> search_group_info(State, Group) end)
of
{ok, #group_info{members = Members}}
when Members /= undefined ->
Members;
_ -> []
end.
get_group_name(Host, Group) ->
{ok, State} = eldap_utils:get_state(Host, ?MODULE),
case cache_tab:dirty_lookup(shared_roster_ldap_group,
{Group, Host},
fun () -> search_group_info(State, Group) end)
of
{ok, #group_info{desc = GroupName}}
when GroupName /= undefined ->
GroupName;
_ -> Group
end.
get_user_name(User, Host) ->
{ok, State} = eldap_utils:get_state(Host, ?MODULE),
case cache_tab:dirty_lookup(shared_roster_ldap_user,
{User, Host},
fun () -> search_user_name(State, User) end)
of
{ok, UserName} -> UserName;
error -> User
end.
search_group_info(State, Group) ->
Extractor = case State#state.uid_format_re of
<<"">> ->
fun (UID) ->
catch eldap_utils:get_user_part(UID,
State#state.uid_format)
end;
_ ->
fun (UID) ->
catch get_user_part_re(UID,
State#state.uid_format_re)
end
end,
AuthChecker = case State#state.auth_check of
true -> fun ejabberd_auth:is_user_exists/2;
_ -> fun (_U, _S) -> true end
end,
Host = State#state.host,
case eldap_search(State,
[eldap_filter:do_sub(State#state.gfilter,
[{<<"%g">>, Group}])],
[State#state.group_attr, State#state.group_desc,
State#state.uid])
of
[] -> error;
LDAPEntries ->
{GroupDesc, MembersLists} = lists:foldl(fun
(#eldap_entry{attributes =
Attrs},
{DescAcc, JIDsAcc}) ->
case
{eldap_utils:get_ldap_attr(State#state.group_attr,
Attrs),
eldap_utils:get_ldap_attr(State#state.group_desc,
Attrs),
lists:keysearch(State#state.uid,
1,
Attrs)}
of
{ID, Desc,
{value,
{GroupMemberAttr,
Members}}}
when ID /= <<"">>,
GroupMemberAttr
==
State#state.uid ->
JIDs =
lists:foldl(fun
({ok,
UID},
L) ->
PUID =
jlib:nodeprep(UID),
case
PUID
of
error ->
L;
_ ->
case
AuthChecker(PUID,
Host)
of
true ->
[{PUID,
Host}
| L];
_ ->
L
end
end;
(_,
L) ->
L
end,
[],
lists:map(Extractor,
Members)),
{Desc,
[JIDs
| JIDsAcc]};
_ ->
{DescAcc, JIDsAcc}
end
end,
{Group, []}, LDAPEntries),
{ok,
#group_info{desc = GroupDesc,
members = lists:usort(lists:flatten(MembersLists))}}
end.
search_user_name(State, User) ->
case eldap_search(State,
[eldap_filter:do_sub(State#state.ufilter,
[{<<"%u">>, User}])],
[State#state.user_desc, State#state.user_uid])
of
[#eldap_entry{attributes = Attrs} | _] ->
case {eldap_utils:get_ldap_attr(State#state.user_uid,
Attrs),
eldap_utils:get_ldap_attr(State#state.user_desc, Attrs)}
of
{UID, Desc} when UID /= <<"">> -> {ok, Desc};
_ -> error
end;
[] -> error
end.
%% Getting User ID part by regex pattern
get_user_part_re(String, Pattern) ->
case catch re:run(String, Pattern) of
{match, Captured} ->
{First, Len} = lists:nth(2, Captured),
Result = str:sub_string(String, First + 1, First + Len),
{ok, Result};
_ -> {error, badmatch}
end.
parse_options(Host, Opts) ->
Eldap_ID = jlib:atom_to_binary(gen_mod:get_module_proc(Host, ?MODULE)),
Cfg = eldap_utils:get_config(Host, Opts),
GroupAttr = gen_mod:get_opt(ldap_groupattr, Opts,
fun iolist_to_binary/1,
<<"cn">>),
GroupDesc = gen_mod:get_opt(ldap_groupdesc, Opts,
fun iolist_to_binary/1,
GroupAttr),
UserDesc = gen_mod:get_opt(ldap_userdesc, Opts,
fun iolist_to_binary/1,
<<"cn">>),
UserUID = gen_mod:get_opt(ldap_useruid, Opts,
fun iolist_to_binary/1,
<<"cn">>),
UIDAttr = gen_mod:get_opt(ldap_memberattr, Opts,
fun iolist_to_binary/1,
<<"memberUid">>),
UIDAttrFormat = gen_mod:get_opt(ldap_memberattr_format, Opts,
fun iolist_to_binary/1,
<<"%u">>),
UIDAttrFormatRe = gen_mod:get_opt(ldap_memberattr_format_re, Opts,
fun(S) ->
Re = iolist_to_binary(S),
{ok, MP} = re:compile(Re),
MP
end, <<"">>),
AuthCheck = gen_mod:get_opt(ldap_auth_check, Opts,
fun(on) -> true;
(off) -> false;
(false) -> false;
(true) -> true
end, true),
UserCacheValidity = eldap_utils:get_opt(
{ldap_user_cache_validity, Host}, Opts,
fun(I) when is_integer(I), I>0 -> I end,
?USER_CACHE_VALIDITY),
GroupCacheValidity = eldap_utils:get_opt(
{ldap_group_cache_validity, Host}, Opts,
fun(I) when is_integer(I), I>0 -> I end,
?GROUP_CACHE_VALIDITY),
UserCacheSize = eldap_utils:get_opt(
{ldap_user_cache_size, Host}, Opts,
fun(I) when is_integer(I), I>0 -> I end,
?CACHE_SIZE),
GroupCacheSize = eldap_utils:get_opt(
{ldap_group_cache_size, Host}, Opts,
fun(I) when is_integer(I), I>0 -> I end,
?CACHE_SIZE),
ConfigFilter = eldap_utils:get_opt({ldap_filter, Host}, Opts,
fun check_filter/1, <<"">>),
ConfigUserFilter = eldap_utils:get_opt({ldap_ufilter, Host}, Opts,
fun check_filter/1, <<"">>),
ConfigGroupFilter = eldap_utils:get_opt({ldap_gfilter, Host}, Opts,
fun check_filter/1, <<"">>),
RosterFilter = eldap_utils:get_opt({ldap_rfilter, Host}, Opts,
fun check_filter/1, <<"">>),
SubFilter = <<"(&(", UIDAttr/binary, "=",
UIDAttrFormat/binary, ")(", GroupAttr/binary, "=%g))">>,
UserSubFilter = case ConfigUserFilter of
<<"">> ->
eldap_filter:do_sub(SubFilter, [{<<"%g">>, <<"*">>}]);
UString -> UString
end,
GroupSubFilter = case ConfigGroupFilter of
<<"">> ->
eldap_filter:do_sub(SubFilter,
[{<<"%u">>, <<"*">>}]);
GString -> GString
end,
Filter = case ConfigFilter of
<<"">> -> SubFilter;
_ ->
<<"(&", SubFilter/binary, ConfigFilter/binary, ")">>
end,
UserFilter = case ConfigFilter of
<<"">> -> UserSubFilter;
_ ->
<<"(&", UserSubFilter/binary, ConfigFilter/binary, ")">>
end,
GroupFilter = case ConfigFilter of
<<"">> -> GroupSubFilter;
_ ->
<<"(&", GroupSubFilter/binary, ConfigFilter/binary,
")">>
end,
#state{host = Host, eldap_id = Eldap_ID,
servers = Cfg#eldap_config.servers,
backups = Cfg#eldap_config.backups,
port = Cfg#eldap_config.port,
tls_options = Cfg#eldap_config.tls_options,
dn = Cfg#eldap_config.dn,
password = Cfg#eldap_config.password,
base = Cfg#eldap_config.base,
deref_aliases = Cfg#eldap_config.deref_aliases,
uid = UIDAttr,
group_attr = GroupAttr, group_desc = GroupDesc,
user_desc = UserDesc, user_uid = UserUID,
uid_format = UIDAttrFormat,
uid_format_re = UIDAttrFormatRe, filter = Filter,
ufilter = UserFilter, rfilter = RosterFilter,
gfilter = GroupFilter, auth_check = AuthCheck,
user_cache_size = UserCacheSize,
user_cache_validity = UserCacheValidity,
group_cache_size = GroupCacheSize,
group_cache_validity = GroupCacheValidity}.
check_filter(F) ->
NewF = iolist_to_binary(F),
{ok, _} = eldap_filter:parse(NewF),
NewF.
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