fix efka_agent
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f088ae8795
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d544c04709
@ -4,20 +4,19 @@
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%%% @doc
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%%%
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%%% @end
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%%% Created : 20. 4月 2025 18:47
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%%% Created : 29. 4月 2025 17:47
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%%%-------------------------------------------------------------------
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-module(efka_agent).
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-author("anlicheng").
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-include("message_pb.hrl").
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-include("efka.hrl").
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-behaviour(gen_server).
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-behaviour(gen_statem).
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%% API
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-export([start_link/0]).
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%% gen_server callbacks
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
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%% gen_statem callbacks
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-export([init/1, format_status/2, handle_event/4, terminate/3, code_change/4, callback_mode/0]).
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-define(SERVER, ?MODULE).
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@ -25,165 +24,148 @@
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-define(STATE_DENIED, denied).
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-define(STATE_CONNECTING, connecting).
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-define(STATE_AUTH, auth).
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%% 不能推送消息到服务，但是可以接受服务器的部分指令
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-define(STATE_RESTRICTED, restricted).
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%% 激活状态下
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-define(STATE_ACTIVATED, activated).
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-record(state, {
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transport_pid :: undefined | pid(),
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status = ?STATE_DENIED
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transport_pid :: undefined | pid()
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}).
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%%%===================================================================
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%%% API
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%%%===================================================================
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%% @doc Spawns the server and registers the local name (unique)
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-spec(start_link() ->
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{ok, Pid :: pid()} | ignore | {error, Reason :: term()}).
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%% @doc Creates a gen_statem process which calls Module:init/1 to
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%% initialize. To ensure a synchronized start-up procedure, this
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%% function does not return until Module:init/1 has returned.
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start_link() ->
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gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).
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gen_statem:start_link({local, ?SERVER}, ?MODULE, [], []).
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%%%===================================================================
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%%% gen_server callbacks
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%%% gen_statem callbacks
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%%%===================================================================
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%% @private
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%% @doc Initializes the server
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-spec(init(Args :: term()) ->
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{ok, State :: #state{}} | {ok, State :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term()} | ignore).
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%% @doc Whenever a gen_statem is started using gen_statem:start/[3,4] or
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%% gen_statem:start_link/[3,4], this function is called by the new
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%% process to initialize.
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init([]) ->
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erlang:process_flag(trap_exit, true),
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erlang:start_timer(0, self(), create_transport),
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{ok, #state{}}.
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{ok, ?STATE_DENIED, #state{}}.
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%% @private
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%% @doc Handling call messages
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-spec(handle_call(Request :: term(), From :: {pid(), Tag :: term()}, State :: #state{}) ->
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{reply, Reply :: term(), NewState :: #state{}} |
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{reply, Reply :: term(), NewState :: #state{}, timeout() | hibernate} |
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{noreply, NewState :: #state{}} |
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{noreply, NewState :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term(), Reply :: term(), NewState :: #state{}} |
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{stop, Reason :: term(), NewState :: #state{}}).
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handle_call(_Request, _From, State = #state{}) ->
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{reply, ok, State}.
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%% @doc This function is called by a gen_statem when it needs to find out
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%% the callback mode of the callback module.
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callback_mode() ->
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handle_event_function.
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%% @private
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%% @doc Handling cast messages
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-spec(handle_cast(Request :: term(), State :: #state{}) ->
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{noreply, NewState :: #state{}} |
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{noreply, NewState :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term(), NewState :: #state{}}).
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handle_cast(_Request, State = #state{}) ->
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{noreply, State}.
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%% @doc Called (1) whenever sys:get_status/1,2 is called by gen_statem or
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%% (2) when gen_statem terminates abnormally.
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%% This callback is optional.
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format_status(_Opt, [_PDict, _StateName, _State]) ->
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Status = some_term,
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Status.
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%% @private
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%% @doc Handling all non call/cast messages
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-spec(handle_info(Info :: timeout() | term(), State :: #state{}) ->
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{noreply, NewState :: #state{}} |
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{noreply, NewState :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term(), NewState :: #state{}}).
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handle_info({timeout, _, create_transport}, State = #state{}) ->
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%% @doc If callback_mode is handle_event_function, then whenever a
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%% gen_statem receives an event from call/2, cast/2, or as a normal
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%% process message, this function is called.
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%% 异步建立到目标服务器的连接
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handle_event(info, {timeout, _, create_transport}, ?STATE_DENIED, State = #state{}) ->
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{ok, Props} = application:get_env(efka, tls_server),
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Host = proplists:get_value(host, Props),
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Port = proplists:get_value(port, Props),
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{ok, TransportPid} = efka_transport:start_link(self(), Host, Port),
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efka_transport:connect(TransportPid),
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{noreply, State#state{transport_pid = TransportPid, status = ?STATE_CONNECTING}};
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{next_state, ?STATE_CONNECTING, State};
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%% 连接的消息确认
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handle_info({connect_reply, Reply}, State = #state{transport_pid = TransportPid}) ->
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%% 连接的回复
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handle_event(info, {connect_reply, Reply}, ?STATE_CONNECTING, State = #state{transport_pid = TransportPid}) ->
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case Reply of
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ok ->
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efka_transport:auth_request(TransportPid, 5000),
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{noreply, State#state{status = ?STATE_AUTH}};
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{next_state, ?STATE_AUTH, State};
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{error, Reason} ->
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lager:debug("[efka_agent] connect failed, error: ~p, pid: ~p", [Reason, TransportPid]),
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% efka_transport:stop(TransportPid),
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{noreply, State#state{status = ?STATE_DENIED}}
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{next_state, ?STATE_DENIED, State}
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end;
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%% 验证的消息确认
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handle_info({auth_reply, Reply}, State = #state{transport_pid = TransportPid}) ->
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%% 权限校验的回复
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handle_event(info, {auth_reply, Reply}, ?STATE_AUTH, State = #state{transport_pid = TransportPid}) ->
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case Reply of
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{ok, #auth_reply{code = 1, message = Message, repository_url = RepositoryUrl}} ->
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lager:debug("[efka_agent] auth failed, message: ~p, repository_url: ~p", [Message, RepositoryUrl]),
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{noreply, State#state{status = ?STATE_ACTIVATED}};
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{next_state, ?STATE_ACTIVATED, State};
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%% 主机在后台的授权未通过；此时agent不能推送数据给云端服务器，但是云端服务器可以推送命令给agent
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%% socket的连接状态需要维持
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{ok, #auth_reply{code = -1, message = Message}} ->
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lager:debug("[efka_agent] auth denied, message: ~p", [Message]),
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{noreply, State#state{status = ?STATE_DENIED}};
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{next_state, ?STATE_RESTRICTED, State};
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%% 其他类型的错误，需要间隔时间重试
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{ok, #auth_reply{code = -2, message = Message}} ->
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lager:debug("[efka_agent] auth failed, message: ~p", [Message]),
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efka_transport:stop(TransportPid),
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{noreply, State#state{transport_pid = undefined, status = ?STATE_DENIED}};
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{next_state, ?STATE_DENIED, State#state{transport_pid = undefined}};
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{error, Reason} ->
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lager:debug("[efka_agent] auth_request failed, error: ~p", [Reason]),
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efka_transport:stop(TransportPid),
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{noreply, State#state{transport_pid = undefined, status = ?STATE_DENIED}}
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{next_state, ?STATE_DENIED, State#state{transport_pid = undefined}}
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end;
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%% 云端服务器推送了消息
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%% 激活消息
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handle_info({server_push_message, <<8:8, ActivatePush>>}, State = #state{transport_pid = TransportPid, status = Status}) ->
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%% TODO
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handle_event(info, {server_push_message, <<8:8, ActivatePush>>}, StateName, State = #state{transport_pid = TransportPid}) ->
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#activate_push{auth = Auth} = message_pb:decode_msg(ActivatePush, activate_push),
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case {Auth, Status} of
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case {Auth, StateName} of
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{true, ?STATE_ACTIVATED} ->
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{noreply, State};
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{keep_state, State};
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{true, ?STATE_DENIED} ->
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efka_transport:auth_request(TransportPid, 5000),
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{noreply, State};
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{next_state, ?STATE_AUTH, State};
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{false, _} ->
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{noreply, State#state{status = ?STATE_DENIED}}
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{next_state, ?STATE_DENIED, State}
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end;
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%% TODO 收到指令
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handle_info({server_push_message, <<16:8, Directive>>}, State = #state{}) ->
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#topic_message{topic = Topic, content = Content} = message_pb:decode_msg(Directive, directive),
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lager:debug("[efka_agent] get directive to device_uuid: ~p, content: ~p", [Topic, Content]),
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{noreply, State};
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%% TODO 收到需要回复的指令
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handle_info({server_push_message, PacketId, <<16:8, Directive>>}, State = #state{}) ->
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handle_event(info, {server_push_message, PacketId, <<16:8, Directive>>}, _StateName, State = #state{}) ->
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#topic_message{topic = Topic, content = Content} = message_pb:decode_msg(Directive, directive),
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lager:debug("[efka_agent] get directive with packet_id: ~p, to device_uuid: ~p, content: ~p", [PacketId, Topic, Content]),
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{noreply, State};
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{keep_state, State};
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%% 不管transport因为什么原因退出，间隔一定时间后重试
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handle_info({'EXIT', TransportPid, Reason}, State = #state{transport_pid = TransportPid}) ->
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handle_event(info, {'EXIT', TransportPid, Reason}, _StateName, State = #state{transport_pid = TransportPid}) ->
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lager:debug("[efka_agent] transport pid: ~p, exit with reason: ~p", [TransportPid, Reason]),
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erlang:start_timer(5000, self(), create_transport),
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{noreply, State#state{transport_pid = undefined, status = ?STATE_DENIED}};
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{next_status, ?STATE_DENIED, State#state{transport_pid = undefined}};
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handle_info(Info, State = #state{}) ->
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lager:debug("[efka_agent] get unknown info: ~p", [Info]),
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{noreply, State}.
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handle_event(_EventType, _EventContent, _StateName, State = #state{}) ->
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NextStateName = the_next_state_name,
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{next_state, NextStateName, State}.
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%% @private
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%% @doc This function is called by a gen_server when it is about to
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%% @doc This function is called by a gen_statem when it is about to
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%% terminate. It should be the opposite of Module:init/1 and do any
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%% necessary cleaning up. When it returns, the gen_server terminates
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%% with Reason. The return value is ignored.
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-spec(terminate(Reason :: (normal | shutdown | {shutdown, term()} | term()),
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State :: #state{}) -> term()).
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terminate(_Reason, _State = #state{}) ->
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%% necessary cleaning up. When it returns, the gen_statem terminates with
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%% Reason. The return value is ignored.
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terminate(_Reason, _StateName, _State = #state{}) ->
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ok.
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%% @private
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%% @doc Convert process state when code is changed
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-spec(code_change(OldVsn :: term() | {down, term()}, State :: #state{},
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Extra :: term()) ->
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{ok, NewState :: #state{}} | {error, Reason :: term()}).
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code_change(_OldVsn, State = #state{}, _Extra) ->
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{ok, State}.
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code_change(_OldVsn, StateName, State = #state{}, _Extra) ->
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{ok, StateName, State}.
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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%%%===================================================================
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