231 lines
7.8 KiB
Erlang
231 lines
7.8 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_c2s.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose :
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%%% Created : 16 Nov 2002 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(ejabberd_c2s).
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-author('alexey@sevcom.net').
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-vsn('$Revision$ ').
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-behaviour(gen_fsm).
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%% External exports
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-export([start/1, receiver/2, sender/1, send_text/2]).
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%% gen_fsm callbacks
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%-export([init/1, state_name/2, state_name/3, handle_event/3,
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% handle_sync_event/4, handle_info/3, terminate/3]).
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%
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-export([init/1, wait_for_stream/2, wait_for_auth/2, terminate/3]).
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-record(state, {socket, sender, receiver}).
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-include("ejabberd.hrl").
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%start_old(Socket) ->
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% spawn(?MODULE, init, [Socket]).
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%init_old(Socket) ->
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% SenderPid = spawn(?MODULE, sender, [Socket]),
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% ReceiverPid = spawn(?MODULE, receiver, [Socket, self()]),
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% loop_old(Socket, SenderPid, ReceiverPid).
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%
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%loop_old(Socket, SenderPid, ReceiverPid) ->
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% receive
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% {xmlstreamstart, Name, Attrs} ->
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% ?DEBUG("Socket(~p) -> XML Stream start~n"
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% " Name: ~s~n"
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% " Attrs: ~p~n", [Socket, Name, Attrs]),
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% loop_old(Socket, SenderPid, ReceiverPid);
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% {xmlstreamend, Name} ->
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% ?DEBUG("Socket(~p) -> XML Stream end~n"
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% " Name: ~s~n", [Socket, Name]),
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% loop_old(Socket, SenderPid, ReceiverPid);
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% {xmlstreamelement, El} ->
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% ?DEBUG("Socket(~p) -> XML Stream element~n"
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% " Element: ~p~n", [Socket, El]),
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% loop_old(Socket, SenderPid, ReceiverPid);
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% {xmlstreamerror, Err} ->
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% ?DEBUG("Socket(~p) -> XML Stream error~n"
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% " Error: ~p~n", [Socket, Err]),
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% loop_old(Socket, SenderPid, ReceiverPid)
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% end.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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-define(DBGFSM, true).
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-ifdef(DBGFSM).
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-define(FSMOPTS, [{debug, [trace]}]).
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-else.
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-define(FSMOPTS, []).
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-endif.
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-define(STREAM_HEADER,
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"<?xml version='1.0'?>"
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"<stream:stream xmlns='jabber:client' "
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"xmlns:stream='http://etherx.jabber.org/streams' "
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"id='~s' from='~s'>"
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).
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-define(STREAM_TRAILER, "</stream:stream>").
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-define(INVALID_NS_ERR, "<stream:error>Invalid Namespace</stream:error>").
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%%%----------------------------------------------------------------------
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%%% API
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%%%----------------------------------------------------------------------
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start(Socket) ->
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gen_fsm:start(ejabberd_c2s, [Socket], ?FSMOPTS).
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%start_old(Socket) ->
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% spawn(?MODULE, init, [Socket]).
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%%%----------------------------------------------------------------------
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%%% Callback functions from gen_fsm
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%%%----------------------------------------------------------------------
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%%----------------------------------------------------------------------
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%% Func: init/1
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%% Returns: {ok, StateName, StateData} |
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%% {ok, StateName, StateData, Timeout} |
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%% ignore |
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%% {stop, StopReason}
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%%----------------------------------------------------------------------
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init([Socket]) ->
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SenderPid = spawn(?MODULE, sender, [Socket]),
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ReceiverPid = spawn(?MODULE, receiver, [Socket, self()]),
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{ok, wait_for_stream, #state{socket = Socket,
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receiver = ReceiverPid,
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sender = SenderPid}}.
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%%----------------------------------------------------------------------
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%% Func: StateName/2
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%% Returns: {next_state, NextStateName, NextStateData} |
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%% {next_state, NextStateName, NextStateData, Timeout} |
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%% {stop, Reason, NewStateData}
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%%----------------------------------------------------------------------
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state_name(Event, StateData) ->
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{next_state, state_name, StateData}.
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wait_for_stream({xmlstreamstart, Name, Attrs}, StateData) ->
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% TODO
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Header = io_lib:format(?STREAM_HEADER, ["SID", "localhost"]),
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send_text(StateData#state.sender, Header),
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case lists:keysearch("xmlns:stream", 1, Attrs) of
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{value, {"xmlns:stream", "http://etherx.jabber.org/streams"}} ->
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% TODO
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{next_state, wait_for_auth, StateData};
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_ ->
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send_text(StateData#state.sender, ?INVALID_NS_ERR),
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send_text(StateData#state.sender, ?STREAM_TRAILER),
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{stop, normal, StateData}
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end;
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wait_for_stream(closed, StateData) ->
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{stop, normal, StateData}.
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wait_for_auth({xmlstreamelement, El}, StateData) ->
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% TODO
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{next_state, wait_for_auth, StateData};
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wait_for_auth({xmlstreamend, Name}, StateData) ->
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% TODO
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{stop, normal, StateData};
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wait_for_auth(closed, StateData) ->
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{stop, normal, StateData}.
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%%----------------------------------------------------------------------
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%% Func: StateName/3
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%% Returns: {next_state, NextStateName, NextStateData} |
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%% {next_state, NextStateName, NextStateData, Timeout} |
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%% {reply, Reply, NextStateName, NextStateData} |
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%% {reply, Reply, NextStateName, NextStateData, Timeout} |
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%% {stop, Reason, NewStateData} |
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%% {stop, Reason, Reply, NewStateData}
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%%----------------------------------------------------------------------
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state_name(Event, From, StateData) ->
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Reply = ok,
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{reply, Reply, state_name, StateData}.
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%%----------------------------------------------------------------------
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%% Func: handle_event/3
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%% Returns: {next_state, NextStateName, NextStateData} |
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%% {next_state, NextStateName, NextStateData, Timeout} |
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%% {stop, Reason, NewStateData}
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%%----------------------------------------------------------------------
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handle_event(Event, StateName, StateData) ->
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{next_state, StateName, StateData}.
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%%----------------------------------------------------------------------
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%% Func: handle_sync_event/4
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%% Returns: {next_state, NextStateName, NextStateData} |
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%% {next_state, NextStateName, NextStateData, Timeout} |
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%% {reply, Reply, NextStateName, NextStateData} |
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%% {reply, Reply, NextStateName, NextStateData, Timeout} |
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%% {stop, Reason, NewStateData} |
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%% {stop, Reason, Reply, NewStateData}
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%%----------------------------------------------------------------------
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handle_sync_event(Event, From, StateName, StateData) ->
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Reply = ok,
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{reply, Reply, StateName, StateData}.
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%%----------------------------------------------------------------------
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%% Func: handle_info/3
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%% Returns: {next_state, NextStateName, NextStateData} |
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%% {next_state, NextStateName, NextStateData, Timeout} |
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%% {stop, Reason, NewStateData}
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%%----------------------------------------------------------------------
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handle_info(Info, StateName, StateData) ->
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{next_state, StateName, StateData}.
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%%----------------------------------------------------------------------
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%% Func: terminate/3
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%% Purpose: Shutdown the fsm
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%% Returns: any
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%%----------------------------------------------------------------------
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terminate(Reason, StateName, StateData) ->
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StateData#state.sender ! close,
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ok.
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%%%----------------------------------------------------------------------
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%%% Internal functions
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%%%----------------------------------------------------------------------
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receiver(Socket, C2SPid) ->
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XMLStreamPid = xml_stream:start(C2SPid),
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receiver(Socket, C2SPid, XMLStreamPid).
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receiver(Socket, C2SPid, XMLStreamPid) ->
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case gen_tcp:recv(Socket, 0) of
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{ok, Text} ->
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xml_stream:send_text(XMLStreamPid, Text),
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receiver(Socket, C2SPid, XMLStreamPid);
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{error, closed} ->
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exit(XMLStreamPid, closed),
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gen_fsm:send_event(C2SPid, closed),
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ok
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end.
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sender(Socket) ->
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receive
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{text, Text} ->
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gen_tcp:send(Socket,Text),
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sender(Socket);
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close ->
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gen_tcp:close(Socket),
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ok
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end.
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send_text(Pid, Text) ->
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Pid ! {text, Text}.
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