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fix(emqx_channel): EMQ X replaces MQTT properties when node connects using "topic-alias-maximum" property

This commit is contained in:
zhanghongtong 2020-07-23 15:46:53 +08:00 committed by tigercl
parent 00bc525d8e
commit 0817761aee
2 changed files with 24 additions and 7 deletions
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9
src/emqx_channel.erl
View File

@ -1212,14 +1212,17 @@ process_alias(_Packet, Channel) -> {ok, Channel}.
%% Packing Topic Alias
packing_alias(Packet = #mqtt_packet{
variable = #mqtt_packet_publish{topic_name = Topic} = Publish
variable = #mqtt_packet_publish{
topic_name = Topic,
properties = Prop
} = Publish
},
Channel = ?IS_MQTT_V5 = #channel{topic_aliases = TopicAliases, alias_maximum = Limits}) ->
case find_alias(outbound, Topic, TopicAliases) of
{ok, AliasId} ->
NPublish = Publish#mqtt_packet_publish{
topic_name = <<>>,
properties = #{'Topic-Alias' => AliasId}
properties = maps:merge(Prop, #{'Topic-Alias' => AliasId})
},
{Packet#mqtt_packet{variable = NPublish}, Channel};
error ->
@ -1232,7 +1235,7 @@ packing_alias(Packet = #mqtt_packet{
NChannel = Channel#channel{topic_aliases = NTopicAliases},
NPublish = Publish#mqtt_packet_publish{
topic_name = Topic,
properties = #{'Topic-Alias' => AliasId}
properties = maps:merge(Prop, #{'Topic-Alias' => AliasId})
},
{Packet#mqtt_packet{variable = NPublish}, NChannel};
false -> {Packet, Channel}

20
test/emqx_channel_SUITE.erl
View File

@ -554,15 +554,29 @@ t_process_alias(_) ->
emqx_channel:process_alias(#mqtt_packet{variable = Publish}, Channel).
t_packing_alias(_) ->
Packet1 = #mqtt_packet{variable = #mqtt_packet_publish{topic_name = <<"x">>}},
Packet1 = #mqtt_packet{variable = #mqtt_packet_publish{
topic_name = <<"x">>,
properties = #{'User-Property' => [{<<"k">>, <<"v">>}]}
}},
Packet2 = #mqtt_packet{variable = #mqtt_packet_publish{topic_name = <<"y">>}},
Channel = emqx_channel:set_field(alias_maximum, #{outbound => 1}, channel()),
{RePacket1, NChannel1} = emqx_channel:packing_alias(Packet1, Channel),
?assertEqual(#mqtt_packet{variable = #mqtt_packet_publish{topic_name = <<"x">>, properties = #{'Topic-Alias' => 1}}}, RePacket1),
?assertEqual(#mqtt_packet{variable = #mqtt_packet_publish{
topic_name = <<"x">>,
properties = #{
'Topic-Alias' => 1,
'User-Property' => [{<<"k">>, <<"v">>}]
}
}}, RePacket1),
{RePacket2, NChannel2} = emqx_channel:packing_alias(Packet1, NChannel1),
?assertEqual(#mqtt_packet{variable = #mqtt_packet_publish{topic_name = <<>>, properties = #{'Topic-Alias' => 1}}}, RePacket2),
?assertEqual(#mqtt_packet{variable = #mqtt_packet_publish{
topic_name = <<>>,
properties = #{
'Topic-Alias' => 1,
'User-Property' => [{<<"k">>, <<"v">>}]
}}}, RePacket2),
{RePacket3, _} = emqx_channel:packing_alias(Packet2, NChannel2),
?assertEqual(#mqtt_packet{variable = #mqtt_packet_publish{topic_name = <<"y">>, properties = #{}}}, RePacket3),