client_id

include/emqttd.hrl

@@ -83,12 +83,11 @@
 %% MQTT Client
 %%------------------------------------------------------------------------------
 -record(mqtt_client, {
-    clientid    :: binary() | undefined,
+    client_id   :: binary() | undefined,
     username    :: binary() | undefined,
     ipaddress   :: inet:ip_address(),
-    client_pid  :: pid(),
-    client_mon  :: reference(),
     clean_sess  :: boolean(),
+    client_pid  :: pid(),
     proto_ver   :: 3 | 4
 }).
 
@@ -98,7 +97,7 @@
 %% MQTT Session
 %%------------------------------------------------------------------------------
 -record(mqtt_session, {
-    clientid,
+    client_id,
     session_pid,
     subscriptions = []
 }).
@@ -108,16 +107,16 @@
 %%------------------------------------------------------------------------------
 %% MQTT Message
 %%------------------------------------------------------------------------------
--type mqtt_msgid() :: undefined | 1..16#ffff.
+-type mqtt_msgid() :: binary().
 
 -record(mqtt_message, {
+    msgid           :: mqtt_msgid(),      %% Unique Message ID
     topic           :: binary(),          %% Topic that the message is published to
     from            :: binary() | atom(), %% ClientId of publisher
     qos    = 0      :: 0 | 1 | 2,         %% Message QoS
     retain = false  :: boolean(),         %% Retain flag
     dup    = false  :: boolean(),         %% Dup flag
     sys    = false  :: boolean(),         %% $SYS flag
-    msgid           :: mqtt_msgid(),      %% Message ID
     payload         :: binary(),          %% Payload
     timestamp       :: erlang:timestamp() %% Timestamp
 }).

include/emqttd_protocol.hrl

@@ -32,7 +32,7 @@
 -define(MQTT_PROTO_V311, 4).
 
 -define(PROTOCOL_NAMES, [
-    {?MQTT_PROTO_V31, <<"MQIsdp">>},
+    {?MQTT_PROTO_V31,  <<"MQIsdp">>},
     {?MQTT_PROTO_V311, <<"MQTT">>}]).
 
 -type mqtt_vsn() :: ?MQTT_PROTO_V31 | ?MQTT_PROTO_V311.
@@ -122,11 +122,11 @@
 %%------------------------------------------------------------------------------
 %% MQTT Packets
 %%------------------------------------------------------------------------------
--type mqtt_clientid()  :: binary().
+-type mqtt_client_id()  :: binary().
 -type mqtt_packet_id() :: 1..16#ffff | undefined.
 
 -record(mqtt_packet_connect,  {
-    clientid    = <<>>              :: mqtt_clientid(),
+    client_id   = <<>>              :: mqtt_client_id(),
     proto_ver   = ?MQTT_PROTO_V311  :: mqtt_vsn(),
     proto_name  = <<"MQTT">>        :: binary(),
     will_retain = false             :: boolean(),

src/emqttd_access_control.erl

@@ -97,7 +97,7 @@ check_acl(Client, PubSub, Topic) when PubSub =:= publish orelse PubSub =:= subsc
         [] -> allow;
         AclMods -> check_acl(Client, PubSub, Topic, AclMods)
     end.
-check_acl(#mqtt_client{clientid = ClientId}, PubSub, Topic, []) ->
+check_acl(#mqtt_client{client_id = ClientId}, PubSub, Topic, []) ->
     lager:error("ACL: nomatch when ~s ~s ~s", [ClientId, PubSub, Topic]),
     allow;
 check_acl(Client, PubSub, Topic, [{M, State}|AclMods]) ->

src/emqttd_access_rule.erl

@@ -110,7 +110,7 @@ match_who(_Client, {user, all}) ->
     true;
 match_who(_Client, {client, all}) ->
     true;
-match_who(#mqtt_client{clientid = ClientId}, {client, ClientId}) ->
+match_who(#mqtt_client{client_id = ClientId}, {client, ClientId}) ->
     true;
 match_who(#mqtt_client{username = Username}, {user, Username}) ->
     true;
@@ -145,9 +145,9 @@ feed_var(Client, Pattern) ->
     feed_var(Client, Pattern, []).
 feed_var(_Client, [], Acc) ->
     lists:reverse(Acc);
-feed_var(Client = #mqtt_client{clientid = undefined}, [<<"$c">>|Words], Acc) ->
+feed_var(Client = #mqtt_client{client_id = undefined}, [<<"$c">>|Words], Acc) ->
     feed_var(Client, Words, [<<"$c">>|Acc]);
-feed_var(Client = #mqtt_client{clientid = ClientId}, [<<"$c">>|Words], Acc) ->
+feed_var(Client = #mqtt_client{client_id = ClientId}, [<<"$c">>|Words], Acc) ->
     feed_var(Client, Words, [ClientId |Acc]);
 feed_var(Client = #mqtt_client{username = undefined}, [<<"$u">>|Words], Acc) ->
     feed_var(Client, Words, [<<"$u">>|Acc]);

src/emqttd_auth_clientid.erl

@@ -41,7 +41,7 @@
 
 -define(AUTH_CLIENTID_TAB, mqtt_auth_clientid).
 
--record(?AUTH_CLIENTID_TAB, {clientid, ipaddr, password}).
+-record(?AUTH_CLIENTID_TAB, {client_id, ipaddr, password}).
 
 %%%=============================================================================
 %%% API
@@ -52,7 +52,7 @@
 %% @end
 %%------------------------------------------------------------------------------
 add_clientid(ClientId) when is_binary(ClientId) ->
-    R = #mqtt_auth_clientid{clientid = ClientId},
+    R = #mqtt_auth_clientid{client_id = ClientId},
     mnesia:transaction(fun() -> mnesia:write(R) end).
 
 %%------------------------------------------------------------------------------
@@ -60,7 +60,7 @@ add_clientid(ClientId) when is_binary(ClientId) ->
 %% @end
 %%------------------------------------------------------------------------------
 add_clientid(ClientId, Password) ->
-    R = #mqtt_auth_clientid{clientid = ClientId, password = Password},
+    R = #mqtt_auth_clientid{client_id = ClientId, password = Password},
     mnesia:transaction(fun() -> mnesia:write(R) end).
 
 %%------------------------------------------------------------------------------
@@ -99,15 +99,15 @@ init(Opts) ->
     end,
 	{ok, Opts}.
 
-check(#mqtt_client{clientid = undefined}, _Password, []) ->
+check(#mqtt_client{client_id = undefined}, _Password, []) ->
     {error, "ClientId undefined"};
-check(#mqtt_client{clientid = ClientId, ipaddress = IpAddress}, _Password, []) ->
+check(#mqtt_client{client_id = ClientId, ipaddress = IpAddress}, _Password, []) ->
     check_clientid_only(ClientId, IpAddress);
-check(#mqtt_client{clientid = ClientId, ipaddress = IpAddress}, _Password, [{password, no}|_]) ->
+check(#mqtt_client{client_id = ClientId, ipaddress = IpAddress}, _Password, [{password, no}|_]) ->
     check_clientid_only(ClientId, IpAddress);
 check(_Client, undefined, [{password, yes}|_]) ->
     {error, "Password undefined"};
-check(#mqtt_client{clientid = ClientId}, Password, [{password, yes}|_]) ->
+check(#mqtt_client{client_id = ClientId}, Password, [{password, yes}|_]) ->
     case mnesia:dirty_read(?AUTH_CLIENTID_TAB, ClientId) of
         [] -> {error, "ClientId Not Found"};
         [#?AUTH_CLIENTID_TAB{password = Password}]  -> ok; %% TODO: plaintext??
@@ -129,11 +129,11 @@ load(Fd, {ok, Line}, Clients) when is_list(Line) ->
     case string:tokens(Line, " ") of
         [ClientIdS] ->
             ClientId = list_to_binary(string:strip(ClientIdS, right, $\n)),
-            [#mqtt_auth_clientid{clientid = ClientId} | Clients];
+            [#mqtt_auth_clientid{client_id = ClientId} | Clients];
         [ClientId, IpAddr0] ->
             IpAddr = string:strip(IpAddr0, right, $\n),
             Range = esockd_access:range(IpAddr),
-            [#mqtt_auth_clientid{clientid = list_to_binary(ClientId),
+            [#mqtt_auth_clientid{client_id = list_to_binary(ClientId),
                                  ipaddr = {IpAddr, Range}}|Clients];
         BadLine ->
             lager:error("BadLine in clients.config: ~s", [BadLine]),

src/emqttd_mod_autosub.erl

@@ -45,7 +45,7 @@ load(Opts) ->
                        {?MODULE, client_connected, [Topics]}),
     {ok, #state{topics = Topics}}.
 
-client_connected(?CONNACK_ACCEPT, #mqtt_client{clientid = ClientId, client_pid = ClientPid}, Topics) ->
+client_connected(?CONNACK_ACCEPT, #mqtt_client{client_id = ClientId, client_pid = ClientPid}, Topics) ->
     F = fun(Topic) -> emqttd_topic:feed_var(<<"$c">>, ClientId, Topic) end,
     ClientPid ! {subscribe, [{F(Topic), Qos} || {Topic, Qos} <- Topics]};
 

src/emqttd_mod_presence.erl

@@ -39,7 +39,7 @@ load(Opts) ->
     emqttd_broker:hook(client_disconnected, {?MODULE, client_disconnected}, {?MODULE, client_disconnected, [Opts]}),
     {ok, Opts}.
 
-client_connected(ConnAck, #mqtt_client{clientid   = ClientId,
+client_connected(ConnAck, #mqtt_client{client_id  = ClientId,
                                        username   = Username,
                                        ipaddress  = IpAddress,
                                        clean_sess = CleanSess,

src/emqttd_packet.erl

@@ -96,7 +96,7 @@ format_variable(#mqtt_packet_connect{
                  will_flag     = WillFlag,
                  clean_sess    = CleanSess,
                  keep_alive    = KeepAlive,
-                 clientid      = ClientId,
+                 client_id     = ClientId,
                  will_topic    = WillTopic, 
                  will_msg      = WillMsg, 
                  username      = Username, 

src/emqttd_parser.erl

@@ -112,7 +112,7 @@ parse_frame(Bin, #mqtt_packet_header{type = Type, qos  = Qos} = Header, Length)
                            will_flag   = bool(WillFlag),
                            clean_sess  = bool(CleanSession),
                            keep_alive  = KeepAlive,
-                           clientid   = ClientId,
+                           client_id   = ClientId,
                            will_topic  = WillTopic,
                            will_msg    = WillMsg,
                            username    = UserName,

src/emqttd_protocol.erl

@@ -47,7 +47,7 @@
         proto_ver,
         proto_name,
         username,
-		clientid,
+		client_id,
 		clean_sess,
         session,    
 		will_msg,
@@ -70,25 +70,25 @@ init(Peername, SendFun, Opts) ->
 
 info(#proto_state{proto_ver    = ProtoVer,
                   proto_name   = ProtoName,
-				  clientid	   = ClientId,
+				  client_id	   = ClientId,
 				  clean_sess   = CleanSess,
 				  will_msg	   = WillMsg}) ->
 	[{proto_ver,  ProtoVer},
      {proto_name, ProtoName},
-	 {clientid,   ClientId},
+	 {client_id,   ClientId},
 	 {clean_sess, CleanSess},
 	 {will_msg,   WillMsg}].
 
-clientid(#proto_state{clientid = ClientId}) ->
+clientid(#proto_state{client_id = ClientId}) ->
     ClientId.
 
 client(#proto_state{peername = {Addr, _Port},
-                    clientid = ClientId,
+                    client_id = ClientId,
                     username = Username,
                     clean_sess = CleanSess,
                     proto_ver  = ProtoVer,
                     client_pid = Pid}) ->
-    #mqtt_client{clientid   = ClientId,
+    #mqtt_client{client_id   = ClientId,
                  username   = Username,
                  ipaddress  = Addr,
                  clean_sess = CleanSess,
@@ -126,12 +126,12 @@ handle(Packet = ?CONNECT_PACKET(Var), State0 = #proto_state{peername = Peername}
                          password   = Password,
                          clean_sess = CleanSess,
                          keep_alive = KeepAlive,
-                         clientid   = ClientId} = Var,
+                         client_id   = ClientId} = Var,
 
     State1 = State0#proto_state{proto_ver  = ProtoVer,
                                 proto_name = ProtoName, 
                                 username   = Username,
-                                clientid   = ClientId,
+                                client_id  = ClientId,
                                 clean_sess = CleanSess},
 
     trace(recv, Packet, State1),
@@ -142,7 +142,7 @@ handle(Packet = ?CONNECT_PACKET(Var), State0 = #proto_state{peername = Peername}
             case emqttd_access_control:auth(client(State1), Password) of
                 ok ->
                     %% Generate clientId if null
-                    State2 = State1#proto_state{clientid = clientid(ClientId, State1)},
+                    State2 = State1#proto_state{client_id = clientid(ClientId, State1)},
 
                     %%Starting session
                     {ok, Session} = emqttd_sm:start_session(CleanSess, clientid(State2)),
@@ -167,7 +167,7 @@ handle(Packet = ?CONNECT_PACKET(Var), State0 = #proto_state{peername = Peername}
     send(?CONNACK_PACKET(ReturnCode1), State3);
 
 handle(Packet = ?PUBLISH_PACKET(_Qos, Topic, _PacketId, _Payload),
-           State = #proto_state{clientid = ClientId}) ->
+           State = #proto_state{client_id = ClientId}) ->
 
     case check_acl(publish, Topic, State) of
         allow ->
@@ -199,7 +199,7 @@ handle(?PUBACK_PACKET(?PUBCOMP, PacketId), State = #proto_state{session = Sessio
 handle(?SUBSCRIBE_PACKET(PacketId, []), State) ->
     send(?SUBACK_PACKET(PacketId, []), State);
 
-handle(?SUBSCRIBE_PACKET(PacketId, TopicTable), State = #proto_state{clientid = ClientId, session = Session}) ->
+handle(?SUBSCRIBE_PACKET(PacketId, TopicTable), State = #proto_state{client_id = ClientId, session = Session}) ->
     AllowDenies = [check_acl(subscribe, Topic, State) || {Topic, _Qos} <- TopicTable],
     case lists:member(deny, AllowDenies) of
         true ->
@@ -233,10 +233,10 @@ handle(?PACKET(?DISCONNECT), State) ->
     % clean willmsg
     {stop, normal, State#proto_state{will_msg = undefined}}.
 
-publish(Packet = ?PUBLISH(?QOS_0, _PacketId), #proto_state{clientid = ClientId, session = Session}) ->
+publish(Packet = ?PUBLISH(?QOS_0, _PacketId), #proto_state{client_id = ClientId, session = Session}) ->
     emqttd_session:publish(Session, emqttd_message:from_packet(ClientId, Packet));
 
-publish(Packet = ?PUBLISH(?QOS_1, PacketId), State = #proto_state{clientid = ClientId, session = Session}) ->
+publish(Packet = ?PUBLISH(?QOS_1, PacketId), State = #proto_state{client_id = ClientId, session = Session}) ->
     case emqttd_session:publish(Session, emqttd_message:from_packet(ClientId, Packet)) of
         ok ->
             send(?PUBACK_PACKET(?PUBACK, PacketId), State);
@@ -245,7 +245,7 @@ publish(Packet = ?PUBLISH(?QOS_1, PacketId), State = #proto_state{clientid = Cli
             lager:error("Client ~s: publish qos1 error ~p", [ClientId, Error])
     end;
 
-publish(Packet = ?PUBLISH(?QOS_2, PacketId), State = #proto_state{clientid = ClientId, session = Session}) ->
+publish(Packet = ?PUBLISH(?QOS_2, PacketId), State = #proto_state{client_id = ClientId, session = Session}) ->
     case emqttd_session:publish(Session, emqttd_message:from_packet(ClientId, Packet)) of
         ok ->
             send(?PUBACK_PACKET(?PUBREC, PacketId), State);
@@ -267,11 +267,11 @@ send(Packet, State = #proto_state{sendfun = SendFun, peername = Peername}) when
     SendFun(Data),
     {ok, State}.
 
-trace(recv, Packet, #proto_state{peername = Peername, clientid = ClientId}) ->
+trace(recv, Packet, #proto_state{peername = Peername, client_id = ClientId}) ->
     lager:info([{client, ClientId}], "RECV from ~s@~s: ~s",
                    [ClientId, emqttd_net:format(Peername), emqttd_packet:format(Packet)]);
 
-trace(send, Packet, #proto_state{peername  = Peername, clientid = ClientId}) ->
+trace(send, Packet, #proto_state{peername  = Peername, client_id = ClientId}) ->
 	lager:info([{client, ClientId}], "SEND to ~s@~s: ~s",
                    [ClientId, emqttd_net:format(Peername), emqttd_packet:format(Packet)]).
 
@@ -282,10 +282,10 @@ redeliver({?PUBREL, PacketId}, State) ->
 shutdown(duplicate_id, _State) ->
     quiet; %%
 
-shutdown(_, #proto_state{clientid = undefined}) ->
+shutdown(_, #proto_state{client_id = undefined}) ->
     ignore;
 
-shutdown(Error, #proto_state{peername = Peername, clientid = ClientId, will_msg = WillMsg}) ->
+shutdown(Error, #proto_state{peername = Peername, client_id = ClientId, will_msg = WillMsg}) ->
 	lager:info([{client, ClientId}], "Client ~s@~s: shutdown ~p",
                    [ClientId, emqttd_net:format(Peername), Error]),
     send_willmsg(ClientId, WillMsg),
@@ -333,16 +333,16 @@ validate_connect(Connect = #mqtt_packet_connect{}, ProtoState) ->
 validate_protocol(#mqtt_packet_connect{proto_ver = Ver, proto_name = Name}) ->
     lists:member({Ver, Name}, ?PROTOCOL_NAMES).
 
-validate_clientid(#mqtt_packet_connect{clientid = ClientId}, #proto_state{max_clientid_len = MaxLen})
+validate_clientid(#mqtt_packet_connect{client_id = ClientId}, #proto_state{max_clientid_len = MaxLen})
     when ( size(ClientId) >= 1 ) andalso ( size(ClientId) =< MaxLen ) ->
     true;
 
 %% MQTT3.1.1 allow null clientId.
-validate_clientid(#mqtt_packet_connect{proto_ver =?MQTT_PROTO_V311, clientid = ClientId}, _ProtoState) 
+validate_clientid(#mqtt_packet_connect{proto_ver =?MQTT_PROTO_V311, client_id = ClientId}, _ProtoState) 
     when size(ClientId) =:= 0 ->
     true;
 
-validate_clientid(#mqtt_packet_connect {proto_ver = Ver, clean_sess = CleanSess, clientid = ClientId}, _ProtoState) -> 
+validate_clientid(#mqtt_packet_connect {proto_ver = Ver, clean_sess = CleanSess, client_id = ClientId}, _ProtoState) -> 
     lager:warning("Invalid ClientId: ~s, ProtoVer: ~p, CleanSess: ~s", [ClientId, Ver, CleanSess]),
     false.
 

src/emqttd_serialiser.erl

@@ -60,7 +60,7 @@ serialise_header(#mqtt_packet_header{type   = Type,
       VariableBin/binary,
       PayloadBin/binary>>.
 
-serialise_variable(?CONNECT, #mqtt_packet_connect{clientid   =  ClientId,
+serialise_variable(?CONNECT, #mqtt_packet_connect{client_id   =  ClientId,
                                                   proto_ver   =  ProtoVer,
                                                   proto_name  =  ProtoName,
                                                   will_retain =  WillRetain,

src/emqttd_session.erl

@@ -73,7 +73,7 @@
         clean_sess = true,
 
         %% ClientId: Identifier of Session
-        clientid    :: binary(),
+        client_id   :: binary(),
 
         %% Client Pid linked with session
         client_pid  :: pid(),
@@ -133,7 +133,7 @@
 %% @doc Start a session.
 %% @end
 %%------------------------------------------------------------------------------
--spec start_link(boolean(), mqtt_clientid(), pid()) -> {ok, pid()} | {error, any()}.
+-spec start_link(boolean(), mqtt_client_id(), pid()) -> {ok, pid()} | {error, any()}.
 start_link(CleanSess, ClientId, ClientPid) ->
     gen_server:start_link(?MODULE, [CleanSess, ClientId, ClientPid], []).
 
@@ -141,7 +141,7 @@ start_link(CleanSess, ClientId, ClientPid) ->
 %% @doc Resume a session.
 %% @end
 %%------------------------------------------------------------------------------
--spec resume(pid(), mqtt_clientid(), pid()) -> ok.
+-spec resume(pid(), mqtt_client_id(), pid()) -> ok.
 resume(Session, ClientId, ClientPid) ->
     gen_server:cast(Session, {resume, ClientId, ClientPid}).
 
@@ -149,7 +149,7 @@ resume(Session, ClientId, ClientPid) ->
 %% @doc Destroy a session.
 %% @end
 %%------------------------------------------------------------------------------
--spec destroy(pid(), mqtt_clientid()) -> ok.
+-spec destroy(pid(), mqtt_client_id()) -> ok.
 destroy(Session, ClientId) ->
     gen_server:call(Session, {destroy, ClientId}).
 
@@ -217,7 +217,7 @@ init([CleanSess, ClientId, ClientPid]) ->
     SessEnv = emqttd:env(mqtt, session),
     Session = #session{
             clean_sess        = CleanSess,
-            clientid          = ClientId,
+            client_id         = ClientId,
             client_pid        = ClientPid,
             subscriptions     = [],
             inflight_queue    = [],
@@ -234,7 +234,7 @@ init([CleanSess, ClientId, ClientPid]) ->
             timestamp         = os:timestamp()},
     {ok, Session, hibernate}.
 
-handle_call({subscribe, Topics}, _From, Session = #session{clientid = ClientId,
+handle_call({subscribe, Topics}, _From, Session = #session{client_id = ClientId,
                                                            subscriptions = Subscriptions}) ->
 
     %% subscribe first and don't care if the subscriptions have been existed
@@ -264,7 +264,7 @@ handle_call({subscribe, Topics}, _From, Session = #session{clientid = ClientId,
                 end, Subscriptions, Topics),
     {reply, {ok, GrantedQos}, Session#session{subscriptions = Subscriptions1}};
 
-handle_call({unsubscribe, Topics}, _From, Session = #session{clientid = ClientId,
+handle_call({unsubscribe, Topics}, _From, Session = #session{client_id = ClientId,
                                                              subscriptions = Subscriptions}) ->
 
     %% unsubscribe from topic tree
@@ -285,7 +285,7 @@ handle_call({unsubscribe, Topics}, _From, Session = #session{clientid = ClientId
     {reply, ok, Session#session{subscriptions = Subscriptions1}};
 
 handle_call({publish, Msg = #mqtt_message{qos = ?QOS_2, msgid = MsgId}}, _From, 
-            Session = #session{clientid = ClientId,
+            Session = #session{client_id = ClientId,
                                awaiting_rel = AwaitingRel,
                                await_rel_timeout = Timeout}) ->
     case check_awaiting_rel(Session) of
@@ -294,12 +294,12 @@ handle_call({publish, Msg = #mqtt_message{qos = ?QOS_2, msgid = MsgId}}, _From,
             AwaitingRel1 = maps:put(MsgId, {Msg, TRef}, AwaitingRel),
             {reply, ok, Session#session{awaiting_rel = AwaitingRel1}};
         false ->
-            lager:critical([{clientid, ClientId}], "Session ~s dropped Qos2 message "
+            lager:critical([{client, ClientId}], "Session ~s dropped Qos2 message "
                                 "for too many awaiting_rel: ~p", [ClientId, Msg]),
             {reply, {error, dropped}, Session}
     end;
 
-handle_call({destroy, ClientId}, _From, Session = #session{clientid = ClientId}) ->
+handle_call({destroy, ClientId}, _From, Session = #session{client_id = ClientId}) ->
     lager:warning("Session ~s destroyed", [ClientId]),
     {stop, {shutdown, destroy}, ok, Session};
 
@@ -309,7 +309,7 @@ handle_call(Req, _From, State) ->
 
 handle_cast({resume, ClientId, ClientPid}, Session) ->
 
-    #session{clientid       = ClientId,
+    #session{client_id       = ClientId,
              client_pid     = OldClientPid,
              inflight_queue = InflightQ,
              awaiting_ack   = AwaitingAck,
@@ -349,7 +349,7 @@ handle_cast({resume, ClientId, ClientPid}, Session) ->
     {noreply, dequeue(Session2), hibernate};
 
 %% PUBRAC
-handle_cast({puback, MsgId}, Session = #session{clientid = ClientId, awaiting_ack = Awaiting}) ->
+handle_cast({puback, MsgId}, Session = #session{client_id = ClientId, awaiting_ack = Awaiting}) ->
     case maps:find(MsgId, Awaiting) of
         {ok, {_, TRef}} ->
             cancel_timer(TRef),
@@ -361,7 +361,7 @@ handle_cast({puback, MsgId}, Session = #session{clientid = ClientId, awaiting_ac
     end;
 
 %% PUBREC
-handle_cast({pubrec, MsgId}, Session = #session{clientid = ClientId,
+handle_cast({pubrec, MsgId}, Session = #session{client_id = ClientId,
                                                 awaiting_ack = AwaitingAck,
                                                 awaiting_comp = AwaitingComp,
                                                 await_rel_timeout = Timeout}) ->
@@ -377,7 +377,7 @@ handle_cast({pubrec, MsgId}, Session = #session{clientid = ClientId,
     end;
 
 %% PUBREL
-handle_cast({pubrel, MsgId}, Session = #session{clientid = ClientId,
+handle_cast({pubrel, MsgId}, Session = #session{client_id = ClientId,
                                                 awaiting_rel = AwaitingRel}) ->
     case maps:find(MsgId, AwaitingRel) of
         {ok, {Msg, TRef}} ->
@@ -390,7 +390,7 @@ handle_cast({pubrel, MsgId}, Session = #session{clientid = ClientId,
     end;
 
 %% PUBCOMP
-handle_cast({pubcomp, MsgId}, Session = #session{clientid = ClientId, awaiting_comp = AwaitingComp}) ->
+handle_cast({pubcomp, MsgId}, Session = #session{client_id = ClientId, awaiting_comp = AwaitingComp}) ->
     case maps:find(MsgId, AwaitingComp) of
         {ok, TRef} ->
             cancel_timer(TRef),
@@ -417,7 +417,7 @@ handle_info({dispatch, Msg = #mqtt_message{qos = ?QOS_0}},
     {noreply, Session};
 
 handle_info({dispatch, Msg = #mqtt_message{qos = QoS}},
-            Session = #session{clientid = ClientId, message_queue  = MsgQ})
+            Session = #session{client_id = ClientId, message_queue  = MsgQ})
     when QoS =:= ?QOS_1 orelse QoS =:= ?QOS_2 ->
 
     case check_inflight(Session) of
@@ -433,7 +433,7 @@ handle_info({timeout, awaiting_ack, MsgId}, Session = #session{client_pid = unde
     %% just remove awaiting
     {noreply, Session#session{awaiting_ack = maps:remove(MsgId, AwaitingAck)}};
 
-handle_info({timeout, awaiting_ack, MsgId}, Session = #session{clientid = ClientId,
+handle_info({timeout, awaiting_ack, MsgId}, Session = #session{client_id = ClientId,
                                                                inflight_queue = InflightQ,
                                                                awaiting_ack = AwaitingAck}) ->
     case maps:find(MsgId, AwaitingAck) of
@@ -451,7 +451,7 @@ handle_info({timeout, awaiting_ack, MsgId}, Session = #session{clientid = Client
             {noreply, Session}
     end;
 
-handle_info({timeout, awaiting_rel, MsgId}, Session = #session{clientid = ClientId,
+handle_info({timeout, awaiting_rel, MsgId}, Session = #session{client_id = ClientId,
                                                                awaiting_rel = AwaitingRel}) ->
     case maps:find(MsgId, AwaitingRel) of
         {ok, {Msg, _TRef}} ->
@@ -463,7 +463,7 @@ handle_info({timeout, awaiting_rel, MsgId}, Session = #session{clientid = Client
             {noreply, Session}
     end;
 
-handle_info({timeout, awaiting_comp, MsgId}, Session = #session{clientid = ClientId,
+handle_info({timeout, awaiting_comp, MsgId}, Session = #session{client_id = ClientId,
                                                                 awaiting_comp = Awaiting}) ->
     case maps:find(MsgId, Awaiting) of
         {ok, _TRef} ->
@@ -481,25 +481,25 @@ handle_info({'EXIT', ClientPid, _Reason}, Session = #session{clean_sess = true,
     {stop, normal, Session};
 
 handle_info({'EXIT', ClientPid, Reason}, Session = #session{clean_sess = false,
-                                                            clientid   = ClientId,
+                                                            client_id   = ClientId,
                                                             client_pid = ClientPid,
                                                             expired_after = Expires}) ->
     lager:info("Session ~s unlink with client ~p: reason=~p", [ClientId, ClientPid, Reason]),
     TRef = timer(Expires, session_expired),
     {noreply, Session#session{client_pid = undefined, expired_timer = TRef}, hibernate};
 
-handle_info({'EXIT', Pid, _Reason}, Session = #session{clientid = ClientId,
+handle_info({'EXIT', Pid, _Reason}, Session = #session{client_id = ClientId,
                                                      client_pid = ClientPid}) ->
                                                             
     lager:error("Session ~s received unexpected EXIT:"
                     " client_pid=~p, exit_pid=~p", [ClientId, ClientPid, Pid]),
     {noreply, Session};
 
-handle_info(session_expired, Session = #session{clientid = ClientId}) ->
+handle_info(session_expired, Session = #session{client_id = ClientId}) ->
     lager:error("Session ~s expired, shutdown now!", [ClientId]),
     {stop, {shutdown, expired}, Session};
 
-handle_info(Info, Session = #session{clientid = ClientId}) ->
+handle_info(Info, Session = #session{client_id = ClientId}) ->
     lager:critical("Session ~s received unexpected info: ~p", [ClientId, Info]),
     {noreply, Session}.
 

src/emqttd_sm.erl

@@ -34,6 +34,7 @@
 %%%
 %%% @end
 %%%-----------------------------------------------------------------------------
+
 -module(emqttd_sm).
 
 -author("Feng Lee <feng@emqtt.io>").
@@ -67,12 +68,11 @@
 %% @doc Start a session manager
 %% @end
 %%------------------------------------------------------------------------------
--spec start_link(Id, SessStatsFun) -> {ok, pid()} | ignore | {error, any()} when
+-spec start_link(Id, StatsFun) -> {ok, pid()} | ignore | {error, any()} when
         Id :: pos_integer(),
-        %ClientStatsFun :: fun(),
+        StatsFun :: {fun(), fun()}.
-        SessStatsFun :: fun().
+start_link(Id, StatsFun) ->
-start_link(Id, SessStatsFun) ->
+    gen_server:start_link(?MODULE, [Id, StatsFun], []).
-    gen_server:start_link(?MODULE, [Id, SessStatsFun], []).
 
 %%------------------------------------------------------------------------------
 %% @doc Pool name.
@@ -103,7 +103,7 @@ start_session(CleanSess, ClientId) ->
 -spec lookup_session(binary()) -> pid() | undefined.
 lookup_session(ClientId) ->
     case ets:lookup(?SESSION_TAB, ClientId) of
-        [{_, SessPid, _}] ->  SessPid;
+        [{_Clean, _, SessPid, _}] -> SessPid;
         [] -> undefined
     end.
 
@@ -129,7 +129,7 @@ init([Id, StatsFun]) ->
 handle_call({start_session, {false, ClientId, ClientPid}}, _From, State) ->
     Reply =
     case ets:lookup(?SESSION_TAB, ClientId) of
-        [{_, SessPid, _MRef}] ->
+        [{_Clean, _, SessPid, _MRef}] ->
             emqttd_session:resume(SessPid, ClientId, ClientPid),
             {ok, SessPid};
         [] ->
@@ -139,7 +139,7 @@ handle_call({start_session, {false, ClientId, ClientPid}}, _From, State) ->
 
 handle_call({start_session, {true, ClientId, ClientPid}}, _From, State) ->
     case ets:lookup(?SESSION_TAB, ClientId) of
-        [{_, SessPid, MRef}] ->
+        [{_Clean, _, SessPid, MRef}] ->
             erlang:demonitor(MRef, [flush]),
             emqttd_session:destroy(SessPid, ClientId);
         [] ->
@@ -149,7 +149,7 @@ handle_call({start_session, {true, ClientId, ClientPid}}, _From, State) ->
 
 handle_call({destroy_session, ClientId}, _From, State) ->
     case ets:lookup(?SESSION_TAB, ClientId) of
-        [{_, SessPid, MRef}] ->
+        [{_Clean, _, SessPid, MRef}] ->
             emqttd_session:destroy(SessPid, ClientId),
             erlang:demonitor(MRef, [flush]),
             ets:delete(?SESSION_TAB, ClientId);
@@ -165,7 +165,7 @@ handle_cast(_Msg, State) ->
     {noreply, State}.
 
 handle_info({'DOWN', MRef, process, DownPid, _Reason}, State) ->
-	ets:match_delete(?SESSION_TAB, {'_', DownPid, MRef}),
+	ets:match_delete(?SESSION_TAB, {'_', '_', DownPid, MRef}),
     {noreply, setstats(State)};
 
 handle_info(_Info, State) ->
@@ -184,13 +184,14 @@ code_change(_OldVsn, State, _Extra) ->
 new_session(CleanSess, ClientId, ClientPid) ->
     case emqttd_session_sup:start_session(CleanSess, ClientId, ClientPid) of
         {ok, SessPid} ->
-            ets:insert(?SESSION_TAB, {ClientId, SessPid, erlang:monitor(process, SessPid)}),
+            MRef = erlang:monitor(process, SessPid),
+            ets:insert(?SESSION_TAB, {CleanSess, ClientId, SessPid, MRef}),
             {ok, SessPid};
         {error, Error} ->
             {error, Error}
     end.
 
-setstats(State = #state{statsfun = StatsFun}) ->
+setstats(State = #state{statsfun = {CFun, SFun}}) ->
-    StatsFun(ets:info(?SESSION_TAB, size)), State.
+    CFun(ets:info(?SESSION_TAB, size)),
-
+    SFun(ets:select_count(?SESSION_TAB,  [{{true, '_', '_', '_'}, [], [true]}])),
-
+    State.

src/emqttd_sm_sup.erl

@@ -24,6 +24,7 @@
 %%%
 %%% @end
 %%%-----------------------------------------------------------------------------
+
 -module(emqttd_sm_sup).
 
 -author("Feng Lee <feng@emqtt.io>").
@@ -42,19 +43,20 @@ start_link() ->
     supervisor:start_link({local, ?MODULE}, ?MODULE, []).
 
 init([]) ->
-    ets:new(emqttd_sm:table(), [set, named_table, public,
+    ets:new(emqttd_sm:table(), [set, named_table, public, {keypos, 2},
                                 {write_concurrency, true}]),
     Schedulers = erlang:system_info(schedulers),
     gproc_pool:new(emqttd_sm:pool(), hash, [{size, Schedulers}]),
-    %%ClientStatsFun = emqttd_stats:statsfun('clients/count', 'clients/max'),
-    SessStatsFun = emqttd_stats:statsfun('sessions/count', 'sessions/max'),
     Children = lists:map(
                  fun(I) ->
                     Name = {emqttd_sm, I},
                     gproc_pool:add_worker(emqttd_sm:pool(), Name, I),
-                    {Name, {emqttd_sm, start_link, [I, SessStatsFun]},
+                    {Name, {emqttd_sm, start_link, [I, statsfun()]},
                                 permanent, 10000, worker, [emqttd_sm]}
                  end, lists:seq(1, Schedulers)),
     {ok, {{one_for_all, 10, 100}, Children}}.
 
+statsfun() ->
+    {emqttd_stats:statsfun('clients/count', 'clients/max'),
+     emqttd_stats:statsfun('sessions/count', 'sessions/max')}.
 

src/emqttd_stats.erl

@@ -124,6 +124,7 @@ setstat(Stat, Val) ->
 
 %%------------------------------------------------------------------------------
 %% @doc Set stats with max
+%% TODO: this is wrong...
 %% @end
 %%------------------------------------------------------------------------------
 -spec setstats(Stat :: atom(), MaxStat :: atom(), Val :: pos_integer()) -> boolean().