%%%---------------------------------------------------------------------- %%% File : mod_irc_connection.erl %%% Author : Alexey Shchepin %%% Purpose : %%% Created : 15 Feb 2003 by Alexey Shchepin %%% Id : $Id$ %%%---------------------------------------------------------------------- -module(mod_irc_connection). -author('alexey@sevcom.net'). -vsn('$Revision$ '). -behaviour(gen_fsm). %% External exports -export([start/3, receiver/2, route/4]). %% gen_fsm callbacks -export([init/1, open_socket/2, %wait_for_registration/2, stream_established/2, handle_event/3, handle_sync_event/4, handle_info/3, terminate/3, code_change/4]). -include("ejabberd.hrl"). -include("namespaces.hrl"). -record(state, {socket, receiver, queue, user, myname, server, nick, inbuf = "", outbuf = ""}). -define(IRC_ENCODING, "koi8-r"). -define(DBGFSM, true). -ifdef(DBGFSM). -define(FSMOPTS, [{debug, [trace]}]). -else. -define(FSMOPTS, []). -endif. %%%---------------------------------------------------------------------- %%% API %%%---------------------------------------------------------------------- start(From, Host, Server) -> gen_fsm:start(?MODULE, [From, Host, Server], ?FSMOPTS). %%%---------------------------------------------------------------------- %%% Callback functions from gen_fsm %%%---------------------------------------------------------------------- %%---------------------------------------------------------------------- %% Func: init/1 %% Returns: {ok, StateName, StateData} | %% {ok, StateName, StateData, Timeout} | %% ignore | %% {stop, StopReason} %%---------------------------------------------------------------------- init([From, Host, Server]) -> gen_fsm:send_event(self(), init), {Nick, _, _} = From, {ok, open_socket, #state{queue = queue:new(), user = From, nick = Nick, myname = Host, server = Server}}. %%---------------------------------------------------------------------- %% Func: StateName/2 %% Returns: {next_state, NextStateName, NextStateData} | %% {next_state, NextStateName, NextStateData, Timeout} | %% {stop, Reason, NewStateData} %%---------------------------------------------------------------------- open_socket(init, StateData) -> Addr = StateData#state.server, Port = 6667, ?DEBUG("connecting to ~s:~p~n", [Addr, Port]), case gen_tcp:connect(Addr, Port, [binary, {packet, 0}]) of {ok, Socket} -> % TODO: send nick, etc... %send_text(Socket, io_lib:format(?STREAM_HEADER, % [StateData#state.server])), %send_queue(StateData#state.socket, StateData#state.queue), send_text(Socket, io_lib:format("NICK ~s\r\n", [StateData#state.nick])), send_text(Socket, io_lib:format( "USER ~s ~s ~s :~s\r\n", [StateData#state.nick, StateData#state.nick, StateData#state.myname, StateData#state.nick])), {next_state, wait_for_registration, StateData#state{socket = Socket}}; {error, Reason} -> ?DEBUG("connect return ~p~n", [Reason]), Text = case Reason of timeout -> "Server Connect Timeout"; _ -> "Server Connect Failed" end, bounce_messages(Text), {stop, normal, StateData} end. stream_established({xmlstreamend, Name}, StateData) -> {stop, normal, StateData}; stream_established(timeout, StateData) -> {stop, normal, StateData}; stream_established(closed, StateData) -> {stop, normal, StateData}. %%---------------------------------------------------------------------- %% Func: StateName/3 %% Returns: {next_state, NextStateName, NextStateData} | %% {next_state, NextStateName, NextStateData, Timeout} | %% {reply, Reply, NextStateName, NextStateData} | %% {reply, Reply, NextStateName, NextStateData, Timeout} | %% {stop, Reason, NewStateData} | %% {stop, Reason, Reply, NewStateData} %%---------------------------------------------------------------------- %state_name(Event, From, StateData) -> % Reply = ok, % {reply, Reply, state_name, StateData}. %%---------------------------------------------------------------------- %% Func: handle_event/3 %% Returns: {next_state, NextStateName, NextStateData} | %% {next_state, NextStateName, NextStateData, Timeout} | %% {stop, Reason, NewStateData} %%---------------------------------------------------------------------- handle_event(Event, StateName, StateData) -> {next_state, StateName, StateData}. %%---------------------------------------------------------------------- %% Func: handle_sync_event/4 %% Returns: {next_state, NextStateName, NextStateData} | %% {next_state, NextStateName, NextStateData, Timeout} | %% {reply, Reply, NextStateName, NextStateData} | %% {reply, Reply, NextStateName, NextStateData, Timeout} | %% {stop, Reason, NewStateData} | %% {stop, Reason, Reply, NewStateData} %%---------------------------------------------------------------------- handle_sync_event(Event, From, StateName, StateData) -> Reply = ok, {reply, Reply, StateName, StateData}. code_change(OldVsn, StateName, StateData, Extra) -> {ok, StateName, StateData}. -define(SEND(S), if StateName == stream_established -> send_text(StateData#state.socket, S), StateData; true -> StateData#state{outbuf = StateData#state.outbuf ++ S} end). %%---------------------------------------------------------------------- %% Func: handle_info/3 %% Returns: {next_state, NextStateName, NextStateData} | %% {next_state, NextStateName, NextStateData, Timeout} | %% {stop, Reason, NewStateData} %%---------------------------------------------------------------------- handle_info({route, Channel, Resource, {xmlelement, "presence", Attrs, Els}}, StateName, StateData) -> NewStateData = case xml:get_attr_s("type", Attrs) of "unavailable" -> ?SEND(io_lib:format("PART #~s\r\n", [Channel])); "subscribe" -> StateData; "subscribed" -> StateData; "unsubscribe" -> StateData; "unsubscribed" -> StateData; _ -> ?SEND(io_lib:format("JOIN #~s\r\n", [Channel])) end, {next_state, StateName, NewStateData}; handle_info({route, Channel, Resource, {xmlelement, "message", Attrs, Els} = El}, StateName, StateData) -> NewStateData = case xml:get_attr_s("type", Attrs) of "groupchat" -> ejabberd_router:route( {lists:concat([Channel, "%", StateData#state.server]), StateData#state.myname, StateData#state.nick}, StateData#state.user, El), % TODO: remove newlines from body Body = xml:get_path_s(El, [{elem, "body"}, cdata]), ?SEND(io_lib:format("PRIVMSG #~s :~s\r\n", [Channel, Body])); _ -> StateData end, {next_state, StateName, NewStateData}; handle_info({route, Channel, Resource, Packet}, StateName, StateData) -> {next_state, StateName, StateData}; handle_info({ircstring, [$P, $I, $N, $G, $ | ID]}, StateName, StateData) -> send_text(StateData#state.socket, "PONG " ++ ID ++ "\r\n"), {next_state, StateName, StateData}; handle_info({ircstring, [$: | String]}, StateName, StateData) -> Words = string:tokens(String, " "), case Words of [_, "353" | Items] -> process_channel_list(StateData, Items); [From, "PRIVMSG", [$# | Chan] | _] -> process_privmsg(StateData, Chan, From, String); [From, "PART", [$# | Chan] | _] -> process_part(StateData, Chan, From, String); [From, "JOIN", Chan | _] -> process_join(StateData, Chan, From, String); [From, "MODE", [$# | Chan], "+o", Nick | _] -> process_mode_o(StateData, Chan, From, Nick, "admin", "moderator"); [From, "MODE", [$# | Chan], "-o", Nick | _] -> process_mode_o(StateData, Chan, From, Nick, "member", "participant"); _ -> io:format("unknown irc command '~s'~n", [String]) end, NewStateData = case StateData#state.outbuf of "" -> StateData; Data -> send_text(StateData#state.socket, Data), StateData#state{outbuf = ""} end, {next_state, stream_established, NewStateData}; handle_info({ircstring, String}, StateName, StateData) -> io:format("unknown irc command '~s'~n", [String]), {next_state, StateName, StateData}; handle_info({send_text, Text}, StateName, StateData) -> send_text(StateData#state.socket, Text), {next_state, StateName, StateData}; handle_info({send_element, El}, StateName, StateData) -> case StateName of stream_established -> send_element(StateData#state.socket, El), {next_state, StateName, StateData}; _ -> Q = queue:in(El, StateData#state.queue), {next_state, StateName, StateData#state{queue = Q}} end; handle_info({tcp, Socket, Data}, StateName, StateData) -> Buf = StateData#state.inbuf ++ binary_to_list(Data), {ok, Strings} = regexp:split(Buf, "\r\n"), io:format("strings=~p~n", [Strings]), NewBuf = process_lines(Strings), {next_state, StateName, StateData#state{inbuf = NewBuf}}; handle_info({tcp_closed, Socket}, StateName, StateData) -> gen_fsm:send_event(self(), closed), {next_state, StateName, StateData}; handle_info({tcp_error, Socket, Reason}, StateName, StateData) -> gen_fsm:send_event(self(), closed), {next_state, StateName, StateData}. %%---------------------------------------------------------------------- %% Func: terminate/3 %% Purpose: Shutdown the fsm %% Returns: any %%---------------------------------------------------------------------- terminate(Reason, StateName, StateData) -> ejabberd_mod_irc ! {closed_conection, {StateData#state.user, StateData#state.server}}, case StateData#state.socket of undefined -> ok; Socket -> gen_tcp:close(Socket) end, ok. %%%---------------------------------------------------------------------- %%% Internal functions %%%---------------------------------------------------------------------- receiver(Socket, C2SPid) -> XMLStreamPid = xml_stream:start(C2SPid), receiver(Socket, C2SPid, XMLStreamPid). receiver(Socket, C2SPid, XMLStreamPid) -> case gen_tcp:recv(Socket, 0) of {ok, Text} -> xml_stream:send_text(XMLStreamPid, Text), receiver(Socket, C2SPid, XMLStreamPid); {error, Reason} -> exit(XMLStreamPid, closed), gen_fsm:send_event(C2SPid, closed), ok end. send_text(Socket, Text) -> CText = iconv:convert("utf-8", ?IRC_ENCODING, lists:flatten(Text)), %io:format("IRC OUTu: ~s~nIRC OUTk: ~s~n", [Text, CText]), gen_tcp:send(Socket, CText). send_element(Socket, El) -> send_text(Socket, xml:element_to_string(El)). send_queue(Socket, Q) -> case queue:out(Q) of {{value, El}, Q1} -> send_element(Socket, El), send_queue(Socket, Q1); {empty, Q1} -> ok end. bounce_messages(Reason) -> receive {send_element, El} -> {xmlelement, Name, Attrs, SubTags} = El, case xml:get_attr_s("type", Attrs) of "error" -> ok; _ -> Err = jlib:make_error_reply(El, "502", Reason), From = jlib:string_to_jid(xml:get_attr_s("from", Attrs)), To = jlib:string_to_jid(xml:get_attr_s("to", Attrs)), ejabberd_router ! {route, To, From, Err} end, bounce_messages(Reason) after 0 -> ok end. route(Pid, Channel, Resource, Packet) -> Pid ! {route, Channel, Resource, Packet}. process_lines([S]) -> S; process_lines([S | Ss]) -> self() ! {ircstring, iconv:convert(?IRC_ENCODING, "utf-8", S)}, process_lines(Ss). process_channel_list(StateData, Items) -> process_channel_list_find_chan(StateData, Items). process_channel_list_find_chan(StateData, []) -> ok; process_channel_list_find_chan(StateData, [[$# | Chan] | Items]) -> process_channel_list_users(StateData, Chan, Items); process_channel_list_find_chan(StateData, [_ | Items]) -> process_channel_list_find_chan(StateData, Items). process_channel_list_users(StateData, Chan, []) -> ok; process_channel_list_users(StateData, Chan, [User | Items]) -> process_channel_list_user(StateData, Chan, User), process_channel_list_users(StateData, Chan, Items). process_channel_list_user(StateData, Chan, User) -> User1 = case User of [$: | U1] -> U1; _ -> User end, {User2, Affiliation, Role} = case User1 of [$@ | U2] -> {U2, "admin", "moderator"}; _ -> {User1, "member", "participant"} end, ejabberd_router:route({lists:concat([Chan, "%", StateData#state.server]), StateData#state.myname, User2}, StateData#state.user, {xmlelement, "presence", [], [{xmlelement, "x", [{"xmlns", ?NS_MUC_USER}], [{xmlelement, "item", [{"affiliation", Affiliation}, {"role", Role}], []}]}]}). process_privmsg(StateData, Chan, From, String) -> [FromUser | _] = string:tokens(From, "!"), Msg = lists:last(string:tokens(String, ":")), ejabberd_router:route({lists:concat([Chan, "%", StateData#state.server]), StateData#state.myname, FromUser}, StateData#state.user, {xmlelement, "message", [{"type", "groupchat"}], [{xmlelement, "body", [], [{xmlcdata, Msg}]}]}). process_part(StateData, Chan, From, String) -> [FromUser | _] = string:tokens(From, "!"), %Msg = lists:last(string:tokens(String, ":")), ejabberd_router:route({lists:concat([Chan, "%", StateData#state.server]), StateData#state.myname, FromUser}, StateData#state.user, {xmlelement, "presence", [{"type", "unavailable"}], [{xmlelement, "x", [{"xmlns", ?NS_MUC_USER}], [{xmlelement, "item", [{"affiliation", "member"}, {"role", "none"}], []}]}]}). process_join(StateData, Channel, From, String) -> [FromUser | _] = string:tokens(From, "!"), Chan = lists:subtract(Channel, ":#"), ejabberd_router:route({lists:concat([Chan, "%", StateData#state.server]), StateData#state.myname, FromUser}, StateData#state.user, {xmlelement, "presence", [], [{xmlelement, "x", [{"xmlns", ?NS_MUC_USER}], [{xmlelement, "item", [{"affiliation", "member"}, {"role", "participant"}], []}]}]}). process_mode_o(StateData, Chan, From, Nick, Affiliation, Role) -> %Msg = lists:last(string:tokens(String, ":")), ejabberd_router:route({lists:concat([Chan, "%", StateData#state.server]), StateData#state.myname, Nick}, StateData#state.user, {xmlelement, "presence", [], [{xmlelement, "x", [{"xmlns", ?NS_MUC_USER}], [{xmlelement, "item", [{"affiliation", Affiliation}, {"role", Role}], []}]}]}).