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xmpp.chapril.org-ejabberd/src/mod_privacy.erl
Badlop 8e72271730 * doc/guide.tex: Updated copyright dates to 2008 
* src/*: Likewise

SVN Revision: 1153
2008-01-15 17:02:57 +00:00

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%%%----------------------------------------------------------------------
%%% File : mod_privacy.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : jabber:iq:privacy support
%%% Created : 21 Jul 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2008 Process-one
%%%
%%% 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_privacy).
-author('alexey@process-one.net').
-behaviour(gen_mod).
-export([start/2, stop/1,
process_iq/3,
process_iq_set/4,
process_iq_get/5,
get_user_list/3,
check_packet/6,
updated_list/3]).
-include("ejabberd.hrl").
-include("jlib.hrl").
-include("mod_privacy.hrl").
start(Host, Opts) ->
IQDisc = gen_mod:get_opt(iqdisc, Opts, one_queue),
mnesia:create_table(privacy, [{disc_copies, [node()]},
{attributes, record_info(fields, privacy)}]),
update_table(),
ejabberd_hooks:add(privacy_iq_get, Host,
?MODULE, process_iq_get, 50),
ejabberd_hooks:add(privacy_iq_set, Host,
?MODULE, process_iq_set, 50),
ejabberd_hooks:add(privacy_get_user_list, Host,
?MODULE, get_user_list, 50),
ejabberd_hooks:add(privacy_check_packet, Host,
?MODULE, check_packet, 50),
ejabberd_hooks:add(privacy_updated_list, Host,
?MODULE, updated_list, 50),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host, ?NS_PRIVACY,
?MODULE, process_iq, IQDisc).
stop(Host) ->
ejabberd_hooks:delete(privacy_iq_get, Host,
?MODULE, process_iq_get, 50),
ejabberd_hooks:delete(privacy_iq_set, Host,
?MODULE, process_iq_set, 50),
ejabberd_hooks:delete(privacy_get_user_list, Host,
?MODULE, get_user_list, 50),
ejabberd_hooks:delete(privacy_check_packet, Host,
?MODULE, check_packet, 50),
ejabberd_hooks:delete(privacy_updated_list, Host,
?MODULE, updated_list, 50),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_PRIVACY).
process_iq(_From, _To, IQ) ->
SubEl = IQ#iq.sub_el,
IQ#iq{type = error, sub_el = [SubEl, ?ERR_NOT_ALLOWED]}.
process_iq_get(_, From, _To, #iq{sub_el = SubEl},
#userlist{name = Active}) ->
#jid{luser = LUser, lserver = LServer} = From,
{xmlelement, _, _, Els} = SubEl,
case xml:remove_cdata(Els) of
[] ->
process_lists_get(LUser, LServer, Active);
[{xmlelement, Name, Attrs, _SubEls}] ->
case Name of
"list" ->
ListName = xml:get_attr("name", Attrs),
process_list_get(LUser, LServer, ListName);
_ ->
{error, ?ERR_BAD_REQUEST}
end;
_ ->
{error, ?ERR_BAD_REQUEST}
end.
process_lists_get(LUser, LServer, Active) ->
case catch mnesia:dirty_read(privacy, {LUser, LServer}) of
{'EXIT', _Reason} ->
{error, ?ERR_INTERNAL_SERVER_ERROR};
[] ->
{result, [{xmlelement, "query", [{"xmlns", ?NS_PRIVACY}], []}]};
[#privacy{default = Default, lists = Lists}] ->
case Lists of
[] ->
{result, [{xmlelement, "query",
[{"xmlns", ?NS_PRIVACY}], []}]};
_ ->
LItems = lists:map(
fun({N, _}) ->
{xmlelement, "list",
[{"name", N}], []}
end, Lists),
DItems =
case Default of
none ->
LItems;
_ ->
[{xmlelement, "default",
[{"name", Default}], []} | LItems]
end,
ADItems =
case Active of
none ->
DItems;
_ ->
[{xmlelement, "active",
[{"name", Active}], []} | DItems]
end,
{result,
[{xmlelement, "query", [{"xmlns", ?NS_PRIVACY}],
ADItems}]}
end
end.
process_list_get(LUser, LServer, {value, Name}) ->
case catch mnesia:dirty_read(privacy, {LUser, LServer}) of
{'EXIT', _Reason} ->
{error, ?ERR_INTERNAL_SERVER_ERROR};
[] ->
{error, ?ERR_ITEM_NOT_FOUND};
%{result, [{xmlelement, "query", [{"xmlns", ?NS_PRIVACY}], []}]};
[#privacy{lists = Lists}] ->
case lists:keysearch(Name, 1, Lists) of
{value, {_, List}} ->
LItems = lists:map(fun item_to_xml/1, List),
{result,
[{xmlelement, "query", [{"xmlns", ?NS_PRIVACY}],
[{xmlelement, "list",
[{"name", Name}], LItems}]}]};
_ ->
{error, ?ERR_ITEM_NOT_FOUND}
end
end;
process_list_get(_LUser, _LServer, false) ->
{error, ?ERR_BAD_REQUEST}.
item_to_xml(Item) ->
Attrs1 = [{"action", action_to_list(Item#listitem.action)},
{"order", order_to_list(Item#listitem.order)}],
Attrs2 = case Item#listitem.type of
none ->
Attrs1;
Type ->
[{"type", type_to_list(Item#listitem.type)},
{"value", value_to_list(Type, Item#listitem.value)} |
Attrs1]
end,
SubEls = case Item#listitem.match_all of
true ->
[];
false ->
SE1 = case Item#listitem.match_iq of
true ->
[{xmlelement, "iq", [], []}];
false ->
[]
end,
SE2 = case Item#listitem.match_message of
true ->
[{xmlelement, "message", [], []} | SE1];
false ->
SE1
end,
SE3 = case Item#listitem.match_presence_in of
true ->
[{xmlelement, "presence-in", [], []} | SE2];
false ->
SE2
end,
SE4 = case Item#listitem.match_presence_out of
true ->
[{xmlelement, "presence-out", [], []} | SE3];
false ->
SE3
end,
SE4
end,
{xmlelement, "item", Attrs2, SubEls}.
action_to_list(Action) ->
case Action of
allow -> "allow";
deny -> "deny"
end.
order_to_list(Order) ->
integer_to_list(Order).
type_to_list(Type) ->
case Type of
jid -> "jid";
group -> "group";
subscription -> "subscription"
end.
value_to_list(Type, Val) ->
case Type of
jid -> jlib:jid_to_string(Val);
group -> Val;
subscription ->
case Val of
both -> "both";
to -> "to";
from -> "from";
none -> "none"
end
end.
list_to_action(S) ->
case S of
"allow" -> allow;
"deny" -> deny
end.
process_iq_set(_, From, _To, #iq{sub_el = SubEl}) ->
#jid{luser = LUser, lserver = LServer} = From,
{xmlelement, _, _, Els} = SubEl,
case xml:remove_cdata(Els) of
[{xmlelement, Name, Attrs, SubEls}] ->
ListName = xml:get_attr("name", Attrs),
case Name of
"list" ->
process_list_set(LUser, LServer, ListName,
xml:remove_cdata(SubEls));
"active" ->
process_active_set(LUser, LServer, ListName);
"default" ->
process_default_set(LUser, LServer, ListName);
_ ->
{error, ?ERR_BAD_REQUEST}
end;
_ ->
{error, ?ERR_BAD_REQUEST}
end.
process_default_set(LUser, LServer, {value, Name}) ->
F = fun() ->
case mnesia:read({privacy, {LUser, LServer}}) of
[] ->
{error, ?ERR_ITEM_NOT_FOUND};
[#privacy{lists = Lists} = P] ->
case lists:keymember(Name, 1, Lists) of
true ->
mnesia:write(P#privacy{default = Name,
lists = Lists}),
{result, []};
false ->
{error, ?ERR_ITEM_NOT_FOUND}
end
end
end,
case mnesia:transaction(F) of
{atomic, {error, _} = Error} ->
Error;
{atomic, {result, _} = Res} ->
Res;
_ ->
{error, ?ERR_INTERNAL_SERVER_ERROR}
end;
process_default_set(LUser, LServer, false) ->
F = fun() ->
case mnesia:read({privacy, {LUser, LServer}}) of
[] ->
{result, []};
[R] ->
mnesia:write(R#privacy{default = none}),
{result, []}
end
end,
case mnesia:transaction(F) of
{atomic, {error, _} = Error} ->
Error;
{atomic, {result, _} = Res} ->
Res;
_ ->
{error, ?ERR_INTERNAL_SERVER_ERROR}
end.
process_active_set(LUser, LServer, {value, Name}) ->
case catch mnesia:dirty_read(privacy, {LUser, LServer}) of
[] ->
{error, ?ERR_ITEM_NOT_FOUND};
[#privacy{lists = Lists}] ->
case lists:keysearch(Name, 1, Lists) of
{value, {_, List}} ->
{result, [], #userlist{name = Name, list = List}};
false ->
{error, ?ERR_ITEM_NOT_FOUND}
end
end;
process_active_set(_LUser, _LServer, false) ->
{result, [], #userlist{}}.
process_list_set(LUser, LServer, {value, Name}, Els) ->
case parse_items(Els) of
false ->
{error, ?ERR_BAD_REQUEST};
remove ->
F =
fun() ->
case mnesia:read({privacy, {LUser, LServer}}) of
[] ->
{result, []};
[#privacy{default = Default, lists = Lists} = P] ->
% TODO: check active
if
Name == Default ->
{error, ?ERR_CONFLICT};
true ->
NewLists =
lists:keydelete(Name, 1, Lists),
mnesia:write(
P#privacy{lists = NewLists}),
{result, []}
end
end
end,
case mnesia:transaction(F) of
{atomic, {error, _} = Error} ->
Error;
{atomic, {result, _} = Res} ->
ejabberd_router:route(
jlib:make_jid(LUser, LServer, ""),
jlib:make_jid(LUser, LServer, ""),
{xmlelement, "broadcast", [],
[{privacy_list,
#userlist{name = Name, list = []},
Name}]}),
Res;
_ ->
{error, ?ERR_INTERNAL_SERVER_ERROR}
end;
List ->
F =
fun() ->
case mnesia:wread({privacy, {LUser, LServer}}) of
[] ->
NewLists = [{Name, List}],
mnesia:write(#privacy{us = {LUser, LServer},
lists = NewLists}),
{result, []};
[#privacy{lists = Lists} = P] ->
NewLists1 = lists:keydelete(Name, 1, Lists),
NewLists = [{Name, List} | NewLists1],
mnesia:write(P#privacy{lists = NewLists}),
{result, []}
end
end,
case mnesia:transaction(F) of
{atomic, {error, _} = Error} ->
Error;
{atomic, {result, _} = Res} ->
ejabberd_router:route(
jlib:make_jid(LUser, LServer, ""),
jlib:make_jid(LUser, LServer, ""),
{xmlelement, "broadcast", [],
[{privacy_list,
#userlist{name = Name, list = List},
Name}]}),
Res;
_ ->
{error, ?ERR_INTERNAL_SERVER_ERROR}
end
end;
process_list_set(_LUser, _LServer, false, _Els) ->
{error, ?ERR_BAD_REQUEST}.
parse_items([]) ->
remove;
parse_items(Els) ->
parse_items(Els, []).
parse_items([], Res) ->
lists:reverse(Res);
parse_items([{xmlelement, "item", Attrs, SubEls} | Els], Res) ->
Type = xml:get_attr("type", Attrs),
Value = xml:get_attr("value", Attrs),
SAction = xml:get_attr("action", Attrs),
SOrder = xml:get_attr("order", Attrs),
Action = case catch list_to_action(element(2, SAction)) of
{'EXIT', _} -> false;
Val -> Val
end,
Order = case catch list_to_integer(element(2, SOrder)) of
{'EXIT', _} ->
false;
IntVal ->
if
IntVal >= 0 ->
IntVal;
true ->
false
end
end,
if
(Action /= false) and (Order /= false) ->
I1 = #listitem{action = Action, order = Order},
I2 = case {Type, Value} of
{{value, T}, {value, V}} ->
case T of
"jid" ->
case jlib:string_to_jid(V) of
error ->
false;
JID ->
I1#listitem{
type = jid,
value = jlib:jid_tolower(JID)}
end;
"group" ->
I1#listitem{type = group,
value = V};
"subscription" ->
case V of
"none" ->
I1#listitem{type = subscription,
value = none};
"both" ->
I1#listitem{type = subscription,
value = both};
"from" ->
I1#listitem{type = subscription,
value = from};
"to" ->
I1#listitem{type = subscription,
value = to};
_ ->
false
end
end;
{{value, _}, false} ->
false;
_ ->
I1
end,
case I2 of
false ->
false;
_ ->
case parse_matches(I2, xml:remove_cdata(SubEls)) of
false ->
false;
I3 ->
parse_items(Els, [I3 | Res])
end
end;
true ->
false
end;
parse_items(_, _Res) ->
false.
parse_matches(Item, []) ->
Item#listitem{match_all = true};
parse_matches(Item, Els) ->
parse_matches1(Item, Els).
parse_matches1(Item, []) ->
Item;
parse_matches1(Item, [{xmlelement, "message", _, _} | Els]) ->
parse_matches1(Item#listitem{match_message = true}, Els);
parse_matches1(Item, [{xmlelement, "iq", _, _} | Els]) ->
parse_matches1(Item#listitem{match_iq = true}, Els);
parse_matches1(Item, [{xmlelement, "presence-in", _, _} | Els]) ->
parse_matches1(Item#listitem{match_presence_in = true}, Els);
parse_matches1(Item, [{xmlelement, "presence-out", _, _} | Els]) ->
parse_matches1(Item#listitem{match_presence_out = true}, Els);
parse_matches1(_Item, [{xmlelement, _, _, _} | _Els]) ->
false.
get_user_list(_, User, Server) ->
LUser = jlib:nodeprep(User),
LServer = jlib:nameprep(Server),
case catch mnesia:dirty_read(privacy, {LUser, LServer}) of
[] ->
#userlist{};
[#privacy{default = Default, lists = Lists}] ->
case Default of
none ->
#userlist{};
_ ->
case lists:keysearch(Default, 1, Lists) of
{value, {_, List}} ->
SortedList = lists:keysort(#listitem.order, List),
#userlist{name = Default, list = SortedList};
_ ->
#userlist{}
end
end;
_ ->
#userlist{}
end.
check_packet(_, User, Server,
#userlist{list = List},
{From, To, {xmlelement, PName, _, _}},
Dir) ->
case List of
[] ->
allow;
_ ->
PType = case PName of
"message" -> message;
"iq" -> iq;
"presence" -> presence
end,
case {PType, Dir} of
{message, in} ->
LJID = jlib:jid_tolower(From),
{Subscription, Groups} =
ejabberd_hooks:run_fold(
roster_get_jid_info, jlib:nameprep(Server),
{none, []}, [User, Server, LJID]),
check_packet_aux(List, message,
LJID, Subscription, Groups);
{iq, in} ->
LJID = jlib:jid_tolower(From),
{Subscription, Groups} =
ejabberd_hooks:run_fold(
roster_get_jid_info, jlib:nameprep(Server),
{none, []}, [User, Server, LJID]),
check_packet_aux(List, iq,
LJID, Subscription, Groups);
{presence, in} ->
LJID = jlib:jid_tolower(From),
{Subscription, Groups} =
ejabberd_hooks:run_fold(
roster_get_jid_info, jlib:nameprep(Server),
{none, []}, [User, Server, LJID]),
check_packet_aux(List, presence_in,
LJID, Subscription, Groups);
{presence, out} ->
LJID = jlib:jid_tolower(To),
{Subscription, Groups} =
ejabberd_hooks:run_fold(
roster_get_jid_info, jlib:nameprep(Server),
{none, []}, [User, Server, LJID]),
check_packet_aux(List, presence_out,
LJID, Subscription, Groups);
_ ->
allow
end
end.
check_packet_aux([], _PType, _JID, _Subscription, _Groups) ->
allow;
check_packet_aux([Item | List], PType, JID, Subscription, Groups) ->
#listitem{type = Type, value = Value, action = Action} = Item,
case is_ptype_match(Item, PType) of
true ->
case Type of
none ->
Action;
_ ->
case is_type_match(Type, Value,
JID, Subscription, Groups) of
true ->
Action;
false ->
check_packet_aux(List, PType,
JID, Subscription, Groups)
end
end;
false ->
check_packet_aux(List, PType, JID, Subscription, Groups)
end.
is_ptype_match(Item, PType) ->
case Item#listitem.match_all of
true ->
true;
false ->
case PType of
message ->
Item#listitem.match_message;
iq ->
Item#listitem.match_iq;
presence_in ->
Item#listitem.match_presence_in;
presence_out ->
Item#listitem.match_presence_out
end
end.
is_type_match(Type, Value, JID, Subscription, Groups) ->
case Type of
jid ->
case Value of
{"", Server, ""} ->
case JID of
{_, Server, _} ->
true;
_ ->
false
end;
{User, Server, ""} ->
case JID of
{User, Server, _} ->
true;
_ ->
false
end;
_ ->
Value == JID
end;
subscription ->
Value == Subscription;
group ->
lists:member(Value, Groups)
end.
updated_list(_,
#userlist{name = OldName} = Old,
#userlist{name = NewName} = New) ->
if
OldName == NewName ->
New;
true ->
Old
end.
update_table() ->
Fields = record_info(fields, privacy),
case mnesia:table_info(privacy, attributes) of
Fields ->
ok;
[user, default, lists] ->
?INFO_MSG("Converting privacy table from "
"{user, default, lists} format", []),
Host = ?MYNAME,
{atomic, ok} = mnesia:create_table(
mod_privacy_tmp_table,
[{disc_only_copies, [node()]},
{type, bag},
{local_content, true},
{record_name, privacy},
{attributes, record_info(fields, privacy)}]),
mnesia:transform_table(privacy, ignore, Fields),
F1 = fun() ->
mnesia:write_lock_table(mod_privacy_tmp_table),
mnesia:foldl(
fun(#privacy{us = U} = R, _) ->
mnesia:dirty_write(
mod_privacy_tmp_table,
R#privacy{us = {U, Host}})
end, ok, privacy)
end,
mnesia:transaction(F1),
mnesia:clear_table(privacy),
F2 = fun() ->
mnesia:write_lock_table(privacy),
mnesia:foldl(
fun(R, _) ->
mnesia:dirty_write(R)
end, ok, mod_privacy_tmp_table)
end,
mnesia:transaction(F2),
mnesia:delete_table(mod_privacy_tmp_table);
_ ->
?INFO_MSG("Recreating privacy table", []),
mnesia:transform_table(privacy, ignore, Fields)
end.
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