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%%%----------------------------------------------------------------------
%%% File : mod_proxy65_lib.erl
%%% Author : Evgeniy Khramtsov <xram@jabber.ru>
%%% Purpose : SOCKS5 parsing library.
%%% Created : 12 Oct 2006 by Evgeniy Khramtsov <xram@jabber.ru>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2008 Process-one
%%%
%%% 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_lib).
-author('xram@jabber.ru').
-include("mod_proxy65.hrl").
-export([
unpack_init_message/1,
unpack_auth_request/1,
unpack_request/1,
make_init_reply/1,
make_auth_reply/1,
make_reply/0,
make_error_reply/1,
make_error_reply/2
]).
unpack_init_message(<<?VERSION_5, N, AuthMethodList:N/binary>>)
when N > 0, N < 256 ->
{ok, binary_to_list(AuthMethodList)};
unpack_init_message(_) ->
error.
unpack_auth_request(<<1, ULen, User:ULen/binary,
PLen, Pass:PLen/binary>>) when ULen < 256, PLen < 256 ->
{binary_to_list(User), binary_to_list(Pass)};
unpack_auth_request(_) ->
error.
unpack_request(<<?VERSION_5, CMD, RSV,
?ATYP_DOMAINNAME, 40,
SHA1:40/binary, 0, 0>>) when CMD == ?CMD_CONNECT;
CMD == ?CMD_UDP ->
Command = if
CMD == ?CMD_CONNECT -> connect;
CMD == ?CMD_UDP -> udp
end,
#s5_request{cmd = Command, rsv = RSV, sha1 = binary_to_list(SHA1)};
unpack_request(_) ->
error.
make_init_reply(Method) ->
[?VERSION_5, Method].
make_auth_reply(true) -> [1, ?SUCCESS];
make_auth_reply(false) -> [1, ?ERR_NOT_ALLOWED].
%% WARNING: According to SOCKS5 RFC, this reply is _incorrect_, but
%% Psi writes junk to the beginning of the file on correct reply.
%% I'm not sure, but there may be an issue with other clients.
%% Needs more testing.
make_reply() ->
[?VERSION_5, ?SUCCESS, 0, 0, 0, 0].
make_error_reply(Request) ->
make_error_reply(Request, ?ERR_NOT_ALLOWED).
make_error_reply(#s5_request{rsv = RSV, sha1 = SHA1}, Reason) ->
[?VERSION_5, Reason, RSV, ?ATYP_DOMAINNAME, length(SHA1), SHA1, 0,0].
|
