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