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https://github.com/processone/ejabberd.git
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* src/eldap.erl: Improved logging. We now use ejabberd logging framework (EJAB-582).
* src/eldap.erl: Faster LDAP reconnection (Thanks to Christophe Romain) (EJAB-581) SVN Revision: 1236
This commit is contained in:
Mickaël Rémond
parent
320c266276
commit
4cef493b91
@ -1,3 +1,11 @@
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2008-03-20 Mickael Remond <mremond@process-one.net>
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* src/eldap.erl: Improved logging. We now use ejabberd logging
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framework (EJAB-582).
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* src/eldap.erl: Faster LDAP reconnection (Thanks to Christophe
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Romain) (EJAB-581)
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2008-03-17 Mickael Remond <mremond@process-one.net>
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* src/ejabberd_s2s.erl: Only trigger s2s_connect_hook on
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@ -35,6 +35,14 @@
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%%% Modified by Evgeniy Khramtsov <xram@jabber.ru>
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%%% Implemented queue for bind() requests to prevent pending binds.
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%%% Modified by Christophe Romain <christophe.romain@process-one.net>
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%%% Improve error case handling
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%%% Modified by Mickael Remond <mremond@process-one.net>
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%%% Now use ejabberd log mechanism
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%%% --------------------------------------------------------------------
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-vc('$Id$ ').
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@ -48,20 +56,19 @@
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%%% active_bind - sent bind() request and waiting for response
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%%%----------------------------------------------------------------------
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%%-compile(export_all).
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%%-export([Function/Arity, ...]).
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-behaviour(gen_fsm).
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-include("ejabberd.hrl").
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%% External exports
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-export([start_link/1, start_link/5, start_link/6]).
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-export([start_link/1, start_link/5]).
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-export([baseObject/0,singleLevel/0,wholeSubtree/0,close/1,
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equalityMatch/2,greaterOrEqual/2,lessOrEqual/2,
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approxMatch/2,search/2,substrings/2,present/1,
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'and'/1,'or'/1,'not'/1,modify/3, mod_add/2, mod_delete/2,
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mod_replace/2, add/3, delete/2, modify_dn/5, bind/3]).
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-export([debug_level/2, get_status/1]).
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-export([get_status/1]).
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%% gen_fsm callbacks
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-export([init/1, connecting/2,
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@ -75,26 +82,24 @@
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-include("eldap.hrl").
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-define(LDAP_VERSION, 3).
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-define(RETRY_TIMEOUT, 5000).
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-define(RETRY_TIMEOUT, 500).
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-define(BIND_TIMEOUT, 10000).
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-define(CMD_TIMEOUT, 100000).
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-define(MAX_TRANSACTION_ID, 65535).
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-define(MIN_TRANSACTION_ID, 0).
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-record(eldap, {version = ?LDAP_VERSION,
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hosts, % Possible hosts running LDAP servers
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hosts, % Possible hosts running LDAP servers
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host = null, % Connected Host LDAP server
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port = 389 , % The LDAP server port
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port = 389, % The LDAP server port
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fd = null, % Socket filedescriptor.
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rootdn = "", % Name of the entry to bind as
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passwd, % Password for (above) entry
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id = 0, % LDAP Request ID
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log, % User provided log function
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bind_timer, % Ref to bind timeout
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dict, % dict holding operation params and results
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bind_q, % Queue for bind() requests
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debug_level % Integer debug/logging level
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}).
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bind_q % Queue for bind() requests
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}).
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%%%----------------------------------------------------------------------
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%%% API
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@ -104,20 +109,8 @@ start_link(Name) ->
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gen_fsm:start_link({local, Reg_name}, ?MODULE, [], []).
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start_link(Name, Hosts, Port, Rootdn, Passwd) ->
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Log = fun(_N, Fmt, Args) -> io:format("---- " ++ Fmt, [Args]) end,
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Reg_name = list_to_atom("eldap_" ++ Name),
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gen_fsm:start_link({local, Reg_name}, ?MODULE, {Hosts, Port, Rootdn, Passwd, Log}, []).
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start_link(Name, Hosts, Port, Rootdn, Passwd, Log) ->
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Reg_name = list_to_atom("eldap_" ++ Name),
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gen_fsm:start_link({local, Reg_name}, ?MODULE, {Hosts, Port, Rootdn, Passwd, Log}, []).
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%%% --------------------------------------------------------------------
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%%% Set Debug Level. 0 - none, 1 - errors, 2 - ldap events
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%%% --------------------------------------------------------------------
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debug_level(Handle, N) when integer(N) ->
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Handle1 = get_handle(Handle),
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gen_fsm:sync_send_all_state_event(Handle1, {debug_level,N}).
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gen_fsm:start_link({local, Reg_name}, ?MODULE, {Hosts, Port, Rootdn, Passwd}, []).
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%%% --------------------------------------------------------------------
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%%% Get status of connection.
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@ -377,21 +370,19 @@ get_handle(Name) when list(Name) -> list_to_atom("eldap_" ++ Name).
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%%----------------------------------------------------------------------
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init([]) ->
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case get_config() of
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{ok, Hosts, Rootdn, Passwd, Log} ->
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init({Hosts, Rootdn, Passwd, Log});
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{ok, Hosts, Rootdn, Passwd} ->
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init({Hosts, Rootdn, Passwd});
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{error, Reason} ->
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{stop, Reason}
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end;
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init({Hosts, Port, Rootdn, Passwd, Log}) ->
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init({Hosts, Port, Rootdn, Passwd}) ->
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{ok, connecting, #eldap{hosts = Hosts,
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port = Port,
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rootdn = Rootdn,
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passwd = Passwd,
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id = 0,
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log = Log,
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dict = dict:new(),
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bind_q = queue:new(),
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debug_level = 0}, 0}.
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bind_q = queue:new()}, 0}.
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%%----------------------------------------------------------------------
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%% Func: StateName/2
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@ -484,9 +475,6 @@ handle_event(_Event, StateName, S) ->
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%% {stop, Reason, NewStateData} |
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%% {stop, Reason, Reply, NewStateData}
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%%----------------------------------------------------------------------
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handle_sync_event({debug_level, N}, _From, StateName, S) ->
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{reply, ok, StateName, S#eldap{debug_level = N}};
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handle_sync_event(_Event, _From, StateName, S) ->
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{reply, {StateName, S}, StateName, S}.
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@ -501,7 +489,7 @@ handle_sync_event(_Event, _From, StateName, S) ->
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%% Packets arriving in various states
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%%
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handle_info({tcp, _Socket, Data}, connecting, S) ->
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log1("eldap. tcp packet received when disconnected!~n~p~n", [Data], S),
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?DEBUG("eldap. tcp packet received when disconnected!~n~p", [Data]),
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{next_state, connecting, S};
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handle_info({tcp, _Socket, Data}, wait_bind_response, S) ->
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@ -526,19 +514,26 @@ handle_info({tcp, _Socket, Data}, StateName, S)
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{error, _Reason} -> {next_state, StateName, S}
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end;
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handle_info({tcp_closed, _Socket}, _All_fsm_states, S) ->
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handle_info({tcp_closed, _Socket}, Fsm_state, S) ->
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?WARNING_MSG("LDAP server closed the connection: ~s:~p~nIn State: ~p",
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[S#eldap.host, S#eldap.port ,Fsm_state]),
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F = fun(_Id, [{Timer, From, _Name}|_]) ->
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gen_fsm:reply(From, {error, tcp_closed}),
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cancel_timer(Timer)
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end,
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dict:map(F, S#eldap.dict),
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retry_connect(),
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{next_state, connecting, S#eldap{fd = null,
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dict = dict:new(), bind_q=queue:new()}};
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{ok, NextState, NewS} = connect_bind(S#eldap{fd = null,
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dict = dict:new(),
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bind_q=queue:new()}),
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{next_state, NextState, NewS};
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handle_info({tcp_error, _Socket, Reason}, Fsm_state, S) ->
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log1("eldap received tcp_error: ~p~nIn State: ~p~n", [Reason, Fsm_state], S),
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?DEBUG("eldap received tcp_error: ~p~nIn State: ~p", [Reason, Fsm_state]),
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%% XXX wouldn't it be safer to try reconnect ?
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%% if we were waiting a result, we may mait forever
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%% cause request is probably lost....
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{next_state, Fsm_state, S};
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%%
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%% Timers
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%%
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@ -561,8 +556,8 @@ handle_info({timeout, _Timer, bind_timeout}, wait_bind_response, S) ->
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%% Make sure we don't fill the message queue with rubbish
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%%
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handle_info(Info, StateName, S) ->
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log1("eldap. Unexpected Info: ~p~nIn state: ~p~n when StateData is: ~p~n",
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[Info, StateName, S], S),
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?DEBUG("eldap. Unexpected Info: ~p~nIn state: ~p~n when StateData is: ~p",
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[Info, StateName, S]),
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{next_state, StateName, S}.
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%%----------------------------------------------------------------------
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@ -589,13 +584,16 @@ send_command(Command, From, S) ->
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{Name, Request} = gen_req(Command),
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Message = #'LDAPMessage'{messageID = Id,
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protocolOp = {Name, Request}},
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log2("~p~n",[{Name, Request}], S),
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?DEBUG("~p~n",[{Name, Request}]),
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{ok, Bytes} = asn1rt:encode('ELDAPv3', 'LDAPMessage', Message),
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ok = gen_tcp:send(S#eldap.fd, Bytes),
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Timer = erlang:start_timer(?CMD_TIMEOUT, self(), {cmd_timeout, Id}),
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New_dict = dict:store(Id, [{Timer, From, Name}], S#eldap.dict),
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{ok, S#eldap{id = Id,
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dict = New_dict}}.
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case gen_tcp:send(S#eldap.fd, Bytes) of
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ok ->
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Timer = erlang:start_timer(?CMD_TIMEOUT, self(), {cmd_timeout, Id}),
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New_dict = dict:store(Id, [{Timer, From, Name}], S#eldap.dict),
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{ok, S#eldap{id = Id, dict = New_dict}};
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Error ->
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Error
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end.
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gen_req({search, A}) ->
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{searchRequest,
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@ -647,7 +645,7 @@ recvd_packet(Pkt, S) ->
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case asn1rt:decode('ELDAPv3', 'LDAPMessage', Pkt) of
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{ok,Msg} ->
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Op = Msg#'LDAPMessage'.protocolOp,
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log2("~p~n",[Op], S),
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?DEBUG("~p",[Op]),
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Dict = S#eldap.dict,
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Id = Msg#'LDAPMessage'.messageID,
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{Timer, From, Name, Result_so_far} = get_op_rec(Id, Dict),
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@ -744,7 +742,7 @@ recvd_wait_bind_response(Pkt, S) ->
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check_tag(Pkt),
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case asn1rt:decode('ELDAPv3', 'LDAPMessage', Pkt) of
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{ok,Msg} ->
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log2("~p", [Msg], S),
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?DEBUG("~p", [Msg]),
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check_id(S#eldap.id, Msg#'LDAPMessage'.messageID),
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case Msg#'LDAPMessage'.protocolOp of
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{bindResponse, Result} ->
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@ -844,6 +842,7 @@ polish([], Res, Ref) ->
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connect_bind(S) ->
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Host = next_host(S#eldap.host, S#eldap.hosts),
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TcpOpts = [{packet, asn1}, {active, true}, {keepalive, true}, binary],
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?INFO_MSG("LDAP connection on ~s:~p", [Host, S#eldap.port]),
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case gen_tcp:connect(Host, S#eldap.port, TcpOpts) of
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{ok, Socket} ->
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case bind_request(Socket, S) of
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@ -853,15 +852,15 @@ connect_bind(S) ->
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{ok, wait_bind_response, NewS#eldap{fd = Socket,
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host = Host,
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bind_timer = Timer}};
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{error, _Reason} ->
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{error, Reason} ->
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?ERROR_MSG("LDAP bind failed on ~s:~p~nReason: ~p", [Host, S#eldap.port, Reason]),
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gen_tcp:close(Socket),
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erlang:send_after(?RETRY_TIMEOUT, self(),
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{timeout, retry_connect}),
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retry_connect(),
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{ok, connecting, S#eldap{host = Host}}
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end;
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{error, _Reason} ->
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erlang:send_after(?RETRY_TIMEOUT, self(),
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{timeout, retry_connect}),
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{error, Reason} ->
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?ERROR_MSG("LDAP connection failed on ~s:~p~nReason: ~p", [Host, S#eldap.port, Reason]),
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retry_connect(),
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{ok, connecting, S#eldap{host = Host}}
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end.
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@ -872,10 +871,12 @@ bind_request(Socket, S) ->
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authentication = {simple, S#eldap.passwd}},
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Message = #'LDAPMessage'{messageID = Id,
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protocolOp = {bindRequest, Req}},
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log2("Message:~p~n",[Message], S),
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?DEBUG("Bind Request Message:~p~n",[Message]),
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{ok, Bytes} = asn1rt:encode('ELDAPv3', 'LDAPMessage', Message),
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ok = gen_tcp:send(Socket, Bytes),
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{ok, S#eldap{id = Id}}.
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case gen_tcp:send(Socket, Bytes) of
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ok -> {ok, S#eldap{id = Id}};
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Error -> Error
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end.
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%% Given last tried Server, find next one to try
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next_host(null, [H|_]) -> H; % First time, take first
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@ -946,8 +947,8 @@ get_config() ->
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case file:consult(File) of
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{ok, Entries} ->
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case catch parse(Entries) of
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{ok, Hosts, Port, Rootdn, Passwd, Log} ->
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{ok, Hosts, Port, Rootdn, Passwd, Log};
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{ok, Hosts, Port, Rootdn, Passwd} ->
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{ok, Hosts, Port, Rootdn, Passwd};
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{error, Reason} ->
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{error, Reason};
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{'EXIT', Reason} ->
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@ -962,8 +963,7 @@ parse(Entries) ->
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get_hosts(host, Entries),
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get_integer(port, Entries),
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get_list(rootdn, Entries),
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get_list(passwd, Entries),
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get_log(log, Entries)}.
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get_list(passwd, Entries)}.
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get_integer(Key, List) ->
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case lists:keysearch(Key, 1, List) of
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@ -985,16 +985,6 @@ get_list(Key, List) ->
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throw({error, "No Entry in Config for " ++ atom_to_list(Key)})
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end.
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get_log(Key, List) ->
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case lists:keysearch(Key, 1, List) of
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{value, {Key, Value}} when function(Value) ->
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Value;
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{value, {Key, _Else}} ->
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false;
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false ->
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fun(_Level, Format, Args) -> io:format("--- " ++ Format, Args) end
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end.
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get_hosts(Key, List) ->
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lists:map(fun({Key1, {A,B,C,D}}) when integer(A),
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integer(B),
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@ -1016,15 +1006,3 @@ bump_id(#eldap{id = Id}) when Id > ?MAX_TRANSACTION_ID ->
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?MIN_TRANSACTION_ID;
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bump_id(#eldap{id = Id}) ->
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Id + 1.
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%%% --------------------------------------------------------------------
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%%% Log routines. Call a user provided log routine Fun.
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%%% --------------------------------------------------------------------
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log1(Str, Args, #eldap{log = Fun, debug_level = N}) -> log(Fun, Str, Args, 1, N).
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log2(Str, Args, #eldap{log = Fun, debug_level = N}) -> log(Fun, Str, Args, 2, N).
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log(Fun, Str, Args, This_level, Status) when function(Fun), This_level =< Status ->
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catch Fun(This_level, Str, Args);
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log(_, _, _, _, _) ->
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ok.
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