fix emqtt

apps/iot/include/emqtt.hrl

@@ -399,6 +399,12 @@
                                                     reason_code = 0}
                     }).
 
+-define(PUBREC_PACKET(PacketId, ReasonCode),
+    #mqtt_packet{header   = #mqtt_packet_header{type = ?PUBREC},
+        variable = #mqtt_packet_puback{packet_id   = PacketId,
+            reason_code = ReasonCode}
+    }).
+
 -define(PUBREC_PACKET(PacketId, ReasonCode),
         #mqtt_packet{header   = #mqtt_packet_header{type = ?PUBREC},
                      variable = #mqtt_packet_puback{packet_id   = PacketId,

apps/iot/src/emqtt/emqtt.erl

@@ -790,6 +790,10 @@ connected(cast, ?PUBREC_PACKET(PacketId), State = #state{inflight = Inflight}) -
 			 end,
     send_puback(?PUBREL_PACKET(PacketId), NState);
 
+connected(cast, ?PUBREC_PACKET(PacketId, ReasonCode), State) ->
+    lager:notice("[emqtt] Duplicated PUBREC Packet: ~p, reason_code: ~p, client_id: ~p", [PacketId, ReasonCode, State#state.clientid]),
+    keep_state_and_data;
+
 %%TODO::... if auto_ack is false, should we take PacketId from the map?
 connected(cast, ?PUBREL_PACKET(PacketId),
           State = #state{awaiting_rel = AwaitingRel, auto_ack = AutoAck}) ->

apps/iot/src/emqtt/emqtt_frame.erl

@@ -98,8 +98,7 @@ parse_remaining_len(<<>>, Header, Options) ->
 parse_remaining_len(Rest, Header, Options) ->
     parse_remaining_len(Rest, Header, 1, 0, Options).
 
-parse_remaining_len(_Bin, _Header, _Multiplier, Length, #{max_size := MaxSize})
-  when Length > MaxSize ->
+parse_remaining_len(_Bin, _Header, _Multiplier, Length, #{max_size := MaxSize}) when Length > MaxSize ->
     error(frame_too_large);
 parse_remaining_len(<<>>, Header, Multiplier, Length, Options) ->
     {more, fun(Bin) -> parse_remaining_len(Bin, Header, Multiplier, Length, Options) end};
@@ -119,8 +118,10 @@ parse_remaining_len(<<0:1, Len:7, Rest/binary>>, Header, Multiplier, Value,
                     Options = #{max_size := MaxSize}) ->
     FrameLen = Value + Len * Multiplier,
     if
-        FrameLen > MaxSize -> error(frame_too_large);
-        true -> parse_frame(Rest, Header, FrameLen, Options)
+        FrameLen > MaxSize ->
+            error(frame_too_large);
+        true ->
+            parse_frame(Rest, Header, FrameLen, Options)
     end.
 
 parse_frame(Bin, Header, 0, Options) ->