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fix: limit mqtt max_packet_size to 256MB

This commit is contained in:
Stefan Strigler 2023-07-03 16:07:16 +02:00
parent 2cc0ba1217
commit 263890be47
3 changed files with 8 additions and 1 deletions
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6
apps/emqx/src/emqx_schema.erl
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@ -30,6 +30,7 @@
-include_lib("hocon/include/hoconsc.hrl").
-include_lib("logger.hrl").
-define(MAX_INT_MQTT_PACKET_SIZE, 268435456).
-define(MAX_INT_TIMEOUT_MS, 4294967295).
%% floor(?MAX_INT_TIMEOUT_MS / 1000).
-define(MAX_INT_TIMEOUT_S, 4294967).
@ -45,6 +46,7 @@
-type timeout_duration_s() :: 0..?MAX_INT_TIMEOUT_S.
-type timeout_duration_ms() :: 0..?MAX_INT_TIMEOUT_MS.
-type bytesize() :: integer().
-type mqtt_max_packet_size() :: 1..?MAX_INT_MQTT_PACKET_SIZE.
-type wordsize() :: bytesize().
-type percent() :: float().
-type file() :: string().
@ -71,6 +73,7 @@
-typerefl_from_string({timeout_duration_s/0, emqx_schema, to_timeout_duration_s}).
-typerefl_from_string({timeout_duration_ms/0, emqx_schema, to_timeout_duration_ms}).
-typerefl_from_string({bytesize/0, emqx_schema, to_bytesize}).
-typerefl_from_string({mqtt_max_packet_size/0, emqx_schema, to_bytesize}).
-typerefl_from_string({wordsize/0, emqx_schema, to_wordsize}).
-typerefl_from_string({percent/0, emqx_schema, to_percent}).
-typerefl_from_string({comma_separated_list/0, emqx_schema, to_comma_separated_list}).
@ -151,6 +154,7 @@
timeout_duration_s/0,
timeout_duration_ms/0,
bytesize/0,
mqtt_max_packet_size/0,
wordsize/0,
percent/0,
file/0,
@ -3357,7 +3361,7 @@ mqtt_general() ->
)},
{"max_packet_size",
sc(
bytesize(),
mqtt_max_packet_size(),
#{
default => <<"1MB">>,
desc => ?DESC(mqtt_max_packet_size)

2
apps/emqx_dashboard/src/emqx_dashboard_swagger.erl
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@ -852,6 +852,8 @@ typename_to_spec("timeout()", _Mod) ->
};
typename_to_spec("bytesize()", _Mod) ->
#{type => string, example => <<"32MB">>};
typename_to_spec("mqtt_max_packet_size()", _Mod) ->
#{type => string, example => <<"32MB">>};
typename_to_spec("wordsize()", _Mod) ->
#{type => string, example => <<"1024KB">>};
typename_to_spec("map()", _Mod) ->

1
changes/ce/fix-11184.en.md Normal file
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@ -0,0 +1 @@
Config value for `max_packet_size` has a max value of 256MB defined by protocol. This is now enforced and any configuration with a value greater than that will break.