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xmpp.chapril.org-ejabberd
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xmpp.chapril.org-ejabberd/src/mod_proxy65/mod_proxy65_service.erl

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7.8 KiB
Erlang
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%%%----------------------------------------------------------------------
%%% File : mod_proxy65_service.erl
%%% Author : Evgeniy Khramtsov <xram@jabber.ru>
%%% Purpose : SOCKS5 Bytestreams XMPP service.
%%% Created : 12 Oct 2006 by Evgeniy Khramtsov <xram@jabber.ru>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2009 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License
%%% along with this program; if not, write to the Free Software
%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(mod_proxy65_service).
-author('xram@jabber.ru').
-behaviour(gen_server).
%% gen_server callbacks.
-export([init/1,
handle_info/2,
handle_call/3,
handle_cast/2,
terminate/2,
code_change/3
]).
%% API.
-export([start_link/2, add_listener/2, delete_listener/1]).
-include("ejabberd.hrl").
-include("jlib.hrl").
-define(PROCNAME, ejabberd_mod_proxy65_service).
-record(state, {
myhost,
serverhost,
name,
stream_addr,
port,
acl
}).
%%%------------------------
%%% gen_server callbacks
%%%------------------------
start_link(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:start_link({local, Proc}, ?MODULE, [Host, Opts], []).
init([Host, Opts]) ->
{_IP, State} = parse_options(Host, Opts),
ejabberd_router:register_route(State#state.myhost),
{ok, State}.
terminate(_Reason, #state{myhost=MyHost}) ->
ejabberd_router:unregister_route(MyHost),
ok.
handle_info({route, From, To, {xmlelement, "iq", _, _} = Packet}, State) ->
IQ = jlib:iq_query_info(Packet),
case catch process_iq(From, IQ, State) of
Result when is_record(Result, iq) ->
ejabberd_router:route(To, From, jlib:iq_to_xml(Result));
{'EXIT', Reason} ->
?ERROR_MSG("Error when processing IQ stanza: ~p", [Reason]),
Err = jlib:make_error_reply(Packet, ?ERR_INTERNAL_SERVER_ERROR),
ejabberd_router:route(To, From, Err);
_ ->
ok
end,
{noreply, State};
handle_info(_Info, State) ->
{noreply, State}.
handle_call(get_port, _From, State) ->
{reply, {port, State#state.port}, State};
handle_call(_Request, _From, State) ->
{reply, ok, State}.
handle_cast(_Request, State) ->
{noreply, State}.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%%------------------------
%%% Listener management
%%%------------------------
add_listener(Host, Opts) ->
{IP, State} = parse_options(Host, Opts),
NewOpts = [Host, {ip, IP} | Opts],
ejabberd_listener:add_listener(State#state.port,mod_proxy65_stream,NewOpts).
delete_listener(Host) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
{port, Port} = gen_server:call(Proc, get_port),
catch ejabberd_listener:delete_listener(Port, mod_proxy65_stream).
%%%------------------------
%%% IQ Processing
%%%------------------------
%% disco#info request
process_iq(_, #iq{type = get, xmlns = ?NS_DISCO_INFO, lang = Lang} = IQ, #state{name=Name}) ->
IQ#iq{type = result, sub_el =
[{xmlelement, "query", [{"xmlns", ?NS_DISCO_INFO}], iq_disco_info(Lang, Name)}]};
%% disco#items request
process_iq(_, #iq{type = get, xmlns = ?NS_DISCO_ITEMS} = IQ, _) ->
IQ#iq{type = result, sub_el =
[{xmlelement, "query", [{"xmlns", ?NS_DISCO_ITEMS}], []}]};
%% vCard request
process_iq(_, #iq{type = get, xmlns = ?NS_VCARD, lang = Lang} = IQ, _) ->
IQ#iq{type = result, sub_el =
[{xmlelement, "vCard", [{"xmlns", ?NS_VCARD}], iq_vcard(Lang)}]};
%% bytestreams info request
process_iq(JID, #iq{type = get, sub_el = SubEl, xmlns = ?NS_BYTESTREAMS} = IQ,
#state{acl = ACL, stream_addr = StreamAddr, serverhost = ServerHost}) ->
case acl:match_rule(ServerHost, ACL, JID) of
allow ->
StreamHostEl = [{xmlelement, "streamhost", StreamAddr, []}],
IQ#iq{type = result, sub_el =
[{xmlelement, "query", [{"xmlns", ?NS_BYTESTREAMS}], StreamHostEl}]};
deny ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
end;
%% bytestream activation request
process_iq(InitiatorJID, #iq{type = set, sub_el = SubEl, xmlns = ?NS_BYTESTREAMS} = IQ,
#state{acl = ACL, serverhost = ServerHost}) ->
case acl:match_rule(ServerHost, ACL, InitiatorJID) of
allow ->
ActivateEl = xml:get_path_s(SubEl, [{elem, "activate"}]),
SID = xml:get_tag_attr_s("sid", SubEl),
case catch jlib:string_to_jid(xml:get_tag_cdata(ActivateEl)) of
TargetJID when is_record(TargetJID, jid), SID /= "",
length(SID) =< 128, TargetJID /= InitiatorJID ->
Target = jlib:jid_to_string(jlib:jid_tolower(TargetJID)),
Initiator = jlib:jid_to_string(jlib:jid_tolower(InitiatorJID)),
SHA1 = sha:sha(SID ++ Initiator ++ Target),
case mod_proxy65_sm:activate_stream(SHA1, InitiatorJID, TargetJID, ServerHost) of
ok ->
IQ#iq{type = result, sub_el = []};
false ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_ITEM_NOT_FOUND]};
limit ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_RESOURCE_CONSTRAINT]};
conflict ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_CONFLICT]};
_ ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]}
end;
_ ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]}
end;
deny ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
end;
%% Unknown "set" or "get" request
process_iq(_, #iq{type=Type, sub_el=SubEl} = IQ, _) when Type==get; Type==set ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_SERVICE_UNAVAILABLE]};
%% IQ "result" or "error".
process_iq(_, _, _) ->
ok.
%%%-------------------------
%%% Auxiliary functions.
%%%-------------------------
-define(FEATURE(Feat), {xmlelement,"feature",[{"var", Feat}],[]}).
iq_disco_info(Lang, Name) ->
[{xmlelement, "identity",
[{"category", "proxy"},
{"type", "bytestreams"},
{"name", translate:translate(Lang, Name)}], []},
?FEATURE(?NS_DISCO_INFO),
?FEATURE(?NS_VCARD),
?FEATURE(?NS_BYTESTREAMS)].
iq_vcard(Lang) ->
[{xmlelement, "FN", [],
[{xmlcdata, "ejabberd/mod_proxy65"}]},
{xmlelement, "URL", [],
[{xmlcdata, ?EJABBERD_URI}]},
{xmlelement, "DESC", [],
[{xmlcdata, translate:translate(Lang, "ejabberd SOCKS5 Bytestreams module") ++
"\nCopyright (c) 2003-2009 Alexey Shchepin"}]}].
parse_options(ServerHost, Opts) ->
MyHost = gen_mod:get_opt_host(ServerHost, Opts, "proxy.@HOST@"),
Port = gen_mod:get_opt(port, Opts, 7777),
ACL = gen_mod:get_opt(access, Opts, all),
Name = gen_mod:get_opt(name, Opts, "SOCKS5 Bytestreams"),
IP = case gen_mod:get_opt(ip, Opts, none) of
none -> get_proxy_or_domainip(ServerHost, MyHost);
Addr -> Addr
end,
StrIP = inet_parse:ntoa(IP),
StreamAddr = [{"jid", MyHost}, {"host", StrIP}, {"port", integer_to_list(Port)}],
{IP, #state{myhost = MyHost,
serverhost = ServerHost,
name = Name,
port = Port,
stream_addr = StreamAddr,
acl = ACL}}.
%% Return the IP of the proxy host, or if not found, the ip of the xmpp domain
get_proxy_or_domainip(ServerHost, MyHost) ->
case inet:getaddr(MyHost, inet) of
{ok, Addr} -> Addr;
{error, _} ->
case inet:getaddr(ServerHost, inet) of
{ok, Addr} -> Addr;
{error, _} -> {127,0,0,1}
end
end.
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