128 lines
3.3 KiB
Erlang
128 lines
3.3 KiB
Erlang
%%--------------------------------------------------------------------
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%% Copyright (c) 2021-2023 EMQ Technologies Co., Ltd. All Rights Reserved.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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-module(emqx_authn_mqtt_test_client).
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-behaviour(gen_server).
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-include_lib("emqx/include/emqx_mqtt.hrl").
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%% API
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-export([
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start_link/2,
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stop/1
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]).
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-export([send/2]).
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%% gen_server callbacks
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-export([
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init/1,
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handle_call/3,
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handle_cast/2,
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handle_info/2,
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terminate/2
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]).
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-define(TIMEOUT, 1000).
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-define(TCP_OPTIONS, [
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binary,
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{packet, raw},
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{active, once},
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{nodelay, true}
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]).
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-define(PARSE_OPTIONS, #{
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strict_mode => false,
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max_size => ?MAX_PACKET_SIZE,
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version => ?MQTT_PROTO_V5
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}).
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%%--------------------------------------------------------------------
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%% API
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%%--------------------------------------------------------------------
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start_link(Host, Port) ->
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gen_server:start_link(?MODULE, [Host, Port, self()], []).
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stop(Pid) ->
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gen_server:call(Pid, stop).
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send(Pid, Packet) ->
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gen_server:call(Pid, {send, Packet}).
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%%--------------------------------------------------------------------
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%% gen_server callbacks
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%%--------------------------------------------------------------------
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init([Host, Port, Owner]) ->
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{ok, Socket} = gen_tcp:connect(Host, Port, ?TCP_OPTIONS, ?TIMEOUT),
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{ok, #{
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owner => Owner,
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socket => Socket,
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parse_state => emqx_frame:initial_parse_state(?PARSE_OPTIONS)
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}}.
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handle_info(
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{tcp, _Sock, Data},
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#{
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parse_state := PSt,
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owner := Owner,
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socket := Socket
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} = St
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) ->
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{NewPSt, Packets} = process_incoming(PSt, Data, []),
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ok = deliver(Owner, Packets),
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ok = run_sock(Socket),
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{noreply, St#{parse_state => NewPSt}};
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handle_info({tcp_closed, _Sock}, St) ->
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{stop, normal, St}.
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handle_call({send, Packet}, _From, #{socket := Socket} = St) ->
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ok = gen_tcp:send(Socket, emqx_frame:serialize(Packet, ?MQTT_PROTO_V5)),
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{reply, ok, St};
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handle_call(stop, _From, #{socket := Socket} = St) ->
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ok = gen_tcp:close(Socket),
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{stop, normal, ok, St}.
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handle_cast(_, St) ->
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{noreply, St}.
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terminate(_Reason, _St) ->
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ok.
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%%--------------------------------------------------------------------
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%% internal functions
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%%--------------------------------------------------------------------
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process_incoming(PSt, Data, Packets) ->
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case emqx_frame:parse(Data, PSt) of
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{more, NewPSt} ->
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{NewPSt, lists:reverse(Packets)};
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{ok, Packet, Rest, NewPSt} ->
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process_incoming(NewPSt, Rest, [Packet | Packets])
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end.
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deliver(_Owner, []) ->
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ok;
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deliver(Owner, [Packet | Packets]) ->
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Owner ! {packet, Packet},
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deliver(Owner, Packets).
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run_sock(Socket) ->
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inet:setopts(Socket, [{active, once}]).
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