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

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%%%----------------------------------------------------------------------
%%% File : mod_register.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Inband registration support
%%% Created : 8 Dec 2002 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2010 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_register).
-author('alexey@process-one.net').
-behaviour(gen_mod).
-export([start/2,
stop/1,
stream_feature_register/2,
unauthenticated_iq_register/4,
try_register/5,
process_iq/3]).
-include_lib("exmpp/include/exmpp.hrl").
-include("ejabberd.hrl").
start(Host, Opts) ->
HostB = list_to_binary(Host),
IQDisc = gen_mod:get_opt(iqdisc, Opts, one_queue),
gen_iq_handler:add_iq_handler(ejabberd_local, HostB, ?NS_INBAND_REGISTER,
?MODULE, process_iq, IQDisc),
gen_iq_handler:add_iq_handler(ejabberd_sm, HostB, ?NS_INBAND_REGISTER,
?MODULE, process_iq, IQDisc),
ejabberd_hooks:add(c2s_stream_features, HostB,
?MODULE, stream_feature_register, 50),
ejabberd_hooks:add(c2s_unauthenticated_iq, HostB,
?MODULE, unauthenticated_iq_register, 50),
mnesia:create_table(mod_register_ip,
[{ram_copies, [node()]},
{local_content, true},
{attributes, [key, value]}]),
mnesia:add_table_copy(mod_register_ip, node(), ram_copies),
ok.
stop(Host) ->
HostB = list_to_binary(Host),
ejabberd_hooks:delete(c2s_stream_features, HostB,
?MODULE, stream_feature_register, 50),
ejabberd_hooks:delete(c2s_unauthenticated_iq, HostB,
?MODULE, unauthenticated_iq_register, 50),
gen_iq_handler:remove_iq_handler(ejabberd_local, HostB, ?NS_INBAND_REGISTER),
gen_iq_handler:remove_iq_handler(ejabberd_sm, HostB, ?NS_INBAND_REGISTER).
stream_feature_register(Acc, _Host) ->
[#xmlel{ns = ?NS_INBAND_REGISTER_FEAT, name = 'register'} | Acc].
unauthenticated_iq_register(_Acc,
Server, #iq{ns = ?NS_INBAND_REGISTER} = IQ_Rec, IP) ->
Address = case IP of
{A, _Port} -> A;
_ -> undefined
end,
BareJID = exmpp_jid:make(Server),
ResIQ = process_iq(exmpp_jid:make(),
BareJID,
IQ_Rec,
Address),
exmpp_iq:iq_to_xmlel(ResIQ, BareJID, exmpp_jid:make());
unauthenticated_iq_register(Acc, _Server, _IQ, _IP) ->
Acc.
process_iq(From, To, IQ) ->
process_iq(From, To, IQ, {exmpp_jid:prep_node_as_list(From),
exmpp_jid:prep_domain_as_list(From),
exmpp_jid:prep_resource_as_list(From)}).
process_iq(From, To,
#iq{type = Type, lang = Lang, payload = SubEl} = IQ_Rec,
Source) ->
case Type of
set ->
UTag = exmpp_xml:get_element(SubEl, 'username'),
PTag = exmpp_xml:get_element(SubEl, 'password'),
RTag = exmpp_xml:get_element(SubEl, 'remove'),
Server = exmpp_jid:prep_domain_as_list(To),
if
(UTag /= undefined) and (RTag /= undefined) ->
User = exmpp_xml:get_cdata_as_list(UTag),
case {exmpp_jid:node_as_list(From), exmpp_jid:prep_domain_as_list(From)} of
{User, Server} ->
ejabberd_auth:remove_user(User, Server),
exmpp_iq:result(IQ_Rec, SubEl);
_ ->
if
PTag /= undefined ->
Password = exmpp_xml:get_cdata_as_list(PTag),
case ejabberd_auth:remove_user(User,
Server,
Password) of
ok ->
exmpp_iq:result(IQ_Rec, SubEl);
%% TODO FIXME: This piece of
%% code does not work since
%% the code have been changed
%% to allow several auth
%% modules. lists:foreach can
%% only return ok:
not_allowed ->
exmpp_iq:error(IQ_Rec,
'not-allowed');
not_exists ->
exmpp_iq:error(IQ_Rec,
'item-not-found');
_ ->
exmpp_iq:error(IQ_Rec,
'internal-server-error')
end;
true ->
exmpp_iq:error(IQ_Rec, 'bad-request')
end
end;
(UTag == undefined) and (RTag /= undefined) ->
case {exmpp_jid:node_as_list(From),
exmpp_jid:prep_domain_as_list(From),
exmpp_jid:resource_as_list(From)}of
{User, Server, Resource} ->
ResIQ = exmpp_iq:result(IQ_Rec, SubEl),
ejabberd_router:route(
exmpp_jid:make(User,
Server,
Resource),
exmpp_jid:make(User,
Server,
Resource),
exmpp_iq:iq_to_xmlel(ResIQ)),
ejabberd_auth:remove_user(User, Server),
ignore;
_ ->
exmpp_iq:error(IQ_Rec, 'not-allowed')
end;
(UTag /= undefined) and (PTag /= undefined) ->
User = exmpp_xml:get_cdata_as_list(UTag),
Password = exmpp_xml:get_cdata_as_list(PTag),
case {exmpp_jid:node_as_list(From), exmpp_jid:prep_domain_as_list(From)} of
{User, Server} ->
try_set_password(User, Server, Password, IQ_Rec, SubEl);
_ ->
case check_from(From, Server) of
allow ->
case try_register(User, Server, Password,
Source, Lang) of
ok ->
exmpp_iq:result(IQ_Rec, SubEl);
{error, Error} ->
exmpp_iq:error(IQ_Rec, Error)
end;
deny ->
exmpp_iq:error(IQ_Rec, 'forbidden')
end
end;
true ->
exmpp_iq:error(IQ_Rec, 'bad-request')
end;
get ->
{UsernameSubels, QuerySubels} =
case {exmpp_jid:node_as_list(From), exmpp_jid:prep_domain_as_list(From)} of
{User, Server} when is_list(User) and is_list(Server) ->
case ejabberd_auth:is_user_exists(User,Server) of
true ->
{[#xmlcdata{cdata = list_to_binary(User)}],
[#xmlel{ns = ?NS_INBAND_REGISTER, name = 'registered'}]};
false ->
{[#xmlcdata{cdata = list_to_binary(User)}], []}
end;
_ ->
{[], []}
end,
Result = #xmlel{ns = ?NS_INBAND_REGISTER, name = 'query', children =
[#xmlel{ns = ?NS_INBAND_REGISTER, name = 'instructions', children =
[#xmlcdata{cdata = list_to_binary(
translate:translate(Lang,
"Choose a username and password "
"to register with this server"))}]},
#xmlel{ns = ?NS_INBAND_REGISTER, name = 'username', children = UsernameSubels},
#xmlel{ns = ?NS_INBAND_REGISTER, name = 'password'}
| QuerySubels]},
exmpp_iq:result(IQ_Rec, Result)
end.
%% @doc Try to change password and return IQ response
try_set_password(User, Server, Password, IQ_Rec, SubEl) ->
case ejabberd_auth:set_password(User, Server, Password) of
ok ->
exmpp_iq:result(IQ_Rec, SubEl);
{error, empty_password} ->
exmpp_iq:error(IQ_Rec, 'bad-request');
{error, not_allowed} ->
exmpp_iq:error(IQ_Rec, 'not-allowed');
{error, invalid_jid} ->
exmpp_iq:error(IQ_Rec, 'item-not-found');
_ ->
exmpp_iq:error(IQ_Rec, 'internal-server-error')
end.
try_register(User, Server, Password, Source, Lang) ->
case exmpp_stringprep:is_node(User) of
false ->
{error, 'bad-request'};
_ ->
JID = exmpp_jid:make(User,
Server),
Access = gen_mod:get_module_opt(Server, ?MODULE, access, all),
case acl:match_rule(Server, Access, JID) of
deny ->
{error, 'forbidden'};
allow ->
case check_timeout(Source) of
true ->
case ejabberd_auth:try_register(User, Server, Password) of
{atomic, ok} ->
send_welcome_message(JID),
send_registration_notifications(JID, Source),
ok;
Error ->
remove_timeout(Source),
case Error of
{atomic, exists} ->
{error, 'conflict'};
{error, invalid_jid} ->
{error, 'jid-malformed'};
{error, not_allowed} ->
{error, 'not-allowed'};
{error, _Reason} ->
{error, 'internal-server-error'}
end
end;
false ->
ErrText = "Users are not allowed to register "
"accounts so quickly",
{error, exmpp_stanza:error(?NS_JABBER_CLIENT, 'resource-constraint', {Lang, ErrText})}
end
end
end.
send_welcome_message(JID) ->
Host = exmpp_jid:prep_domain_as_list(JID),
case gen_mod:get_module_opt(Host, ?MODULE, welcome_message, {"", ""}) of
{"", ""} ->
ok;
{Subj, Body} ->
ejabberd_router:route(
exmpp_jid:make(Host),
JID,
exmpp_message:normal(Subj, Body));
_ ->
ok
end.
send_registration_notifications(UJID, Source) ->
Host = exmpp_jid:prep_domain_as_list(UJID),
case gen_mod:get_module_opt(Host, ?MODULE, registration_watchers, []) of
[] -> ok;
JIDs when is_list(JIDs) ->
Body = lists:flatten(
io_lib:format(
"[~s] The account ~s was registered from IP address ~s "
"on node ~w using ~p.",
[get_time_string(), exmpp_jid:to_list(UJID),
ip_to_string(Source), node(), ?MODULE])),
lists:foreach(
fun(S) ->
try
JID = exmpp_jid:parse(S),
ejabberd_router:route(
exmpp_jid:make(Host),
JID,
exmpp_message:chat(Body))
catch
_ ->
ok
end
end, JIDs);
_ ->
ok
end.
check_from(JID, Server) ->
case {exmpp_jid:node(JID), exmpp_jid:prep_domain(JID)} of
{undefined, undefined} ->
allow;
_ ->
Access = gen_mod:get_module_opt(Server, ?MODULE, access_from, none),
acl:match_rule(Server, Access, JID)
end.
check_timeout(undefined) ->
true;
check_timeout(Source) ->
Timeout = case ejabberd_config:get_local_option(registration_timeout) of
undefined -> 600;
TO -> TO
end,
if
is_integer(Timeout) ->
{MSec, Sec, _USec} = now(),
Priority = -(MSec * 1000000 + Sec),
CleanPriority = Priority + Timeout,
F = fun() ->
Treap = case mnesia:read(mod_register_ip, treap,
write) of
[] ->
treap:empty();
[{mod_register_ip, treap, T}] -> T
end,
Treap1 = clean_treap(Treap, CleanPriority),
case treap:lookup(Source, Treap1) of
error ->
Treap2 = treap:insert(Source, Priority, [],
Treap1),
mnesia:write({mod_register_ip, treap, Treap2}),
true;
{ok, _, _} ->
mnesia:write({mod_register_ip, treap, Treap1}),
false
end
end,
case mnesia:transaction(F) of
{atomic, Res} ->
Res;
{aborted, Reason} ->
?ERROR_MSG("mod_register: timeout check error: ~p~n",
[Reason]),
true
end;
true ->
true
end.
clean_treap(Treap, CleanPriority) ->
case treap:is_empty(Treap) of
true ->
Treap;
false ->
{_Key, Priority, _Value} = treap:get_root(Treap),
if
Priority > CleanPriority ->
clean_treap(treap:delete_root(Treap), CleanPriority);
true ->
Treap
end
end.
remove_timeout(undefined) ->
true;
remove_timeout(Source) ->
Timeout = case ejabberd_config:get_local_option(registration_timeout) of
undefined -> 600;
TO -> TO
end,
if
is_integer(Timeout) ->
F = fun() ->
Treap = case mnesia:read(mod_register_ip, treap,
write) of
[] ->
treap:empty();
[{mod_register_ip, treap, T}] -> T
end,
Treap1 = treap:delete(Source, Treap),
mnesia:write({mod_register_ip, treap, Treap1}),
ok
end,
case mnesia:transaction(F) of
{atomic, ok} ->
ok;
{aborted, Reason} ->
?ERROR_MSG("mod_register: timeout remove error: ~p~n",
[Reason]),
ok
end;
true ->
ok
end.
ip_to_string(Source) when is_tuple(Source) -> inet_parse:ntoa(Source);
ip_to_string(undefined) -> "undefined";
ip_to_string(_) -> "unknown".
get_time_string() -> write_time(erlang:localtime()).
%% Function copied from ejabberd_logger_h.erl and customized
write_time({{Y,Mo,D},{H,Mi,S}}) ->
io_lib:format("~w-~.2.0w-~.2.0w ~.2.0w:~.2.0w:~.2.0w",
[Y, Mo, D, H, Mi, S]).
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