mirror of
https://github.com/processone/ejabberd.git
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249 lines
8.0 KiB
Erlang
249 lines
8.0 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_proxy65_service.erl
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%%% Author : Evgeniy Khramtsov <xram@jabber.ru>
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%%% Purpose : SOCKS5 Bytestreams XMPP service.
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%%% Created : 12 Oct 2006 by Evgeniy Khramtsov <xram@jabber.ru>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2010 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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-module(mod_proxy65_service).
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-author('xram@jabber.ru').
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-behaviour(gen_server).
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%% gen_server callbacks.
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-export([init/1,
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handle_info/2,
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handle_call/3,
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handle_cast/2,
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terminate/2,
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code_change/3
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]).
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%% API.
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-export([start_link/2, add_listener/2, delete_listener/1]).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-define(PROCNAME, ejabberd_mod_proxy65_service).
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-record(state, {
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myhost,
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serverhost,
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name,
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stream_addr,
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port,
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ip,
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acl
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}).
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%%%------------------------
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%%% gen_server callbacks
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%%%------------------------
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start_link(Host, Opts) ->
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Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
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gen_server:start_link({local, Proc}, ?MODULE, [Host, Opts], []).
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init([Host, Opts]) ->
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State = parse_options(Host, Opts),
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ejabberd_router:register_route(State#state.myhost),
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{ok, State}.
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terminate(_Reason, #state{myhost=MyHost}) ->
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ejabberd_router:unregister_route(MyHost),
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ok.
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handle_info({route, From, To, {xmlelement, "iq", _, _} = Packet}, State) ->
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IQ = jlib:iq_query_info(Packet),
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case catch process_iq(From, IQ, State) of
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Result when is_record(Result, iq) ->
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ejabberd_router:route(To, From, jlib:iq_to_xml(Result));
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{'EXIT', Reason} ->
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?ERROR_MSG("Error when processing IQ stanza: ~p", [Reason]),
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Err = jlib:make_error_reply(Packet, ?ERR_INTERNAL_SERVER_ERROR),
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ejabberd_router:route(To, From, Err);
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_ ->
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ok
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end,
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{noreply, State};
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handle_info(_Info, State) ->
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{noreply, State}.
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handle_call(get_port_ip, _From, State) ->
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{reply, {port_ip, State#state.port, State#state.ip}, State};
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handle_call(_Request, _From, State) ->
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{reply, ok, State}.
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handle_cast(_Request, State) ->
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{noreply, State}.
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code_change(_OldVsn, State, _Extra) ->
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{ok, State}.
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%%%------------------------
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%%% Listener management
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%%%------------------------
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add_listener(Host, Opts) ->
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State = parse_options(Host, Opts),
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NewOpts = [Host | Opts],
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ejabberd_listener:add_listener({State#state.port, State#state.ip}, mod_proxy65_stream, NewOpts).
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delete_listener(Host) ->
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Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
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{port_ip, Port, IP} = gen_server:call(Proc, get_port_ip),
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catch ejabberd_listener:delete_listener({Port, IP}, mod_proxy65_stream).
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%%%------------------------
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%%% IQ Processing
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%%%------------------------
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%% disco#info request
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process_iq(_, #iq{type = get, xmlns = ?NS_DISCO_INFO, lang = Lang} = IQ,
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#state{name=Name, serverhost=ServerHost}) ->
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Info = ejabberd_hooks:run_fold(
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disco_info, ServerHost, [], [ServerHost, ?MODULE, "", ""]),
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IQ#iq{type = result, sub_el =
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[{xmlelement, "query", [{"xmlns", ?NS_DISCO_INFO}],
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iq_disco_info(Lang, Name) ++ Info}]};
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%% disco#items request
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process_iq(_, #iq{type = get, xmlns = ?NS_DISCO_ITEMS} = IQ, _) ->
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IQ#iq{type = result, sub_el =
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[{xmlelement, "query", [{"xmlns", ?NS_DISCO_ITEMS}], []}]};
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%% vCard request
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process_iq(_, #iq{type = get, xmlns = ?NS_VCARD, lang = Lang} = IQ, _) ->
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IQ#iq{type = result, sub_el =
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[{xmlelement, "vCard", [{"xmlns", ?NS_VCARD}], iq_vcard(Lang)}]};
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%% bytestreams info request
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process_iq(JID, #iq{type = get, sub_el = SubEl, xmlns = ?NS_BYTESTREAMS} = IQ,
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#state{acl = ACL, stream_addr = StreamAddr, serverhost = ServerHost}) ->
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case acl:match_rule(ServerHost, ACL, JID) of
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allow ->
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StreamHostEl = [{xmlelement, "streamhost", StreamAddr, []}],
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IQ#iq{type = result, sub_el =
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[{xmlelement, "query", [{"xmlns", ?NS_BYTESTREAMS}], StreamHostEl}]};
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deny ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
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end;
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%% bytestream activation request
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process_iq(InitiatorJID, #iq{type = set, sub_el = SubEl, xmlns = ?NS_BYTESTREAMS} = IQ,
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#state{acl = ACL, serverhost = ServerHost}) ->
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case acl:match_rule(ServerHost, ACL, InitiatorJID) of
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allow ->
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ActivateEl = xml:get_path_s(SubEl, [{elem, "activate"}]),
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SID = xml:get_tag_attr_s("sid", SubEl),
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case catch jlib:string_to_jid(xml:get_tag_cdata(ActivateEl)) of
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TargetJID when is_record(TargetJID, jid), SID /= "",
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length(SID) =< 128, TargetJID /= InitiatorJID ->
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Target = jlib:jid_to_string(jlib:jid_tolower(TargetJID)),
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Initiator = jlib:jid_to_string(jlib:jid_tolower(InitiatorJID)),
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SHA1 = sha:sha(SID ++ Initiator ++ Target),
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case mod_proxy65_sm:activate_stream(SHA1, InitiatorJID, TargetJID, ServerHost) of
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ok ->
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IQ#iq{type = result, sub_el = []};
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false ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_ITEM_NOT_FOUND]};
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limit ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_RESOURCE_CONSTRAINT]};
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conflict ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_CONFLICT]};
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_ ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]}
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end;
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_ ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]}
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end;
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deny ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
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end;
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%% Unknown "set" or "get" request
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process_iq(_, #iq{type=Type, sub_el=SubEl} = IQ, _) when Type==get; Type==set ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_SERVICE_UNAVAILABLE]};
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%% IQ "result" or "error".
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process_iq(_, _, _) ->
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ok.
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%%%-------------------------
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%%% Auxiliary functions.
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%%%-------------------------
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-define(FEATURE(Feat), {xmlelement,"feature",[{"var", Feat}],[]}).
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iq_disco_info(Lang, Name) ->
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[{xmlelement, "identity",
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[{"category", "proxy"},
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{"type", "bytestreams"},
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{"name", translate:translate(Lang, Name)}], []},
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?FEATURE(?NS_DISCO_INFO),
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?FEATURE(?NS_VCARD),
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?FEATURE(?NS_BYTESTREAMS)].
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iq_vcard(Lang) ->
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[{xmlelement, "FN", [],
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[{xmlcdata, "ejabberd/mod_proxy65"}]},
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{xmlelement, "URL", [],
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[{xmlcdata, ?EJABBERD_URI}]},
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{xmlelement, "DESC", [],
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[{xmlcdata, translate:translate(Lang, "ejabberd SOCKS5 Bytestreams module") ++
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"\nCopyright (c) 2003-2010 Alexey Shchepin"}]}].
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parse_options(ServerHost, Opts) ->
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MyHost = gen_mod:get_opt_host(ServerHost, Opts, "proxy.@HOST@"),
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Port = gen_mod:get_opt(port, Opts, 7777),
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ACL = gen_mod:get_opt(access, Opts, all),
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Name = gen_mod:get_opt(name, Opts, "SOCKS5 Bytestreams"),
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IP = case gen_mod:get_opt(ip, Opts, none) of
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none -> get_my_ip();
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Addr -> Addr
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end,
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HostName = case gen_mod:get_opt(hostname, Opts, none) of
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none ->
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inet_parse:ntoa(IP);
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HostAddr when is_tuple(HostAddr) ->
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inet_parse:ntoa(HostAddr);
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HostNameStr ->
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HostNameStr
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end,
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StreamAddr = [{"jid", MyHost}, {"host", HostName},
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{"port", integer_to_list(Port)}],
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#state{myhost = MyHost,
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serverhost = ServerHost,
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name = Name,
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port = Port,
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ip = IP,
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stream_addr = StreamAddr,
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acl = ACL}.
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get_my_ip() ->
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{ok, MyHostName} = inet:gethostname(),
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case inet:getaddr(MyHostName, inet) of
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{ok, Addr} -> Addr;
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{error, _} -> {127,0,0,1}
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end.
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