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%%%-------------------------------------------------------------------
%%% File : stun.hrl
%%% Author : Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%% Description : STUN values
%%% Created : 8 Aug 2009 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2013 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
%%%
%%%-------------------------------------------------------------------
-define(STUN_MAGIC, 16#2112a442).
%% I know, this is terrible. Refer to 'STUN Message Structure' of
%% RFC5389 to understand this.
-define(STUN_METHOD(Type),
Type band 15872 bsr 2 bor (Type band 224 bsr 1) bor
Type band 15).
-define(STUN_CLASS(Type),
Type band 256 bsr 7 bor (Type band 16 bsr 4)).
-define(STUN_TYPE(C, M),
%% Comprehension-required range (0x0000-0x7FFF)
%% Comprehension-optional range (0x8000-0xFFFF)
M band 3968 bsl 2 bor (M band 112 bsl 1) bor M band 15
bor (C band 2 bsl 7 bor (C band 1 bsl 4))).
-define(is_required(A), A =< 32767).
-define(STUN_METHOD_BINDING, 1).
-define(STUN_ATTR_MAPPED_ADDRESS, 1).
-define(STUN_ATTR_USERNAME, 6).
-define(STUN_ATTR_MESSAGE_INTEGRITY, 8).
-define(STUN_ATTR_ERROR_CODE, 9).
-define(STUN_ATTR_UNKNOWN_ATTRIBUTES, 10).
-define(STUN_ATTR_REALM, 20).
-define(STUN_ATTR_NONCE, 21).
-define(STUN_ATTR_XOR_MAPPED_ADDRESS, 32).
-define(STUN_ATTR_SOFTWARE, 32802).
-define(STUN_ATTR_ALTERNATE_SERVER, 32803).
-define(STUN_ATTR_FINGERPRINT, 32808).
-record(stun,
{class = request :: request | response | error | indication,
method = ?STUN_METHOD_BINDING :: non_neg_integer(),
magic = ?STUN_MAGIC :: non_neg_integer(),
trid = 0 :: non_neg_integer() ,
unsupported = [] :: [non_neg_integer()],
'SOFTWARE',
'ALTERNATE-SERVER',
'MAPPED-ADDRESS',
'XOR-MAPPED-ADDRESS',
'USERNAME',
'REALM',
'NONCE',
'MESSAGE-INTEGRITY',
'ERROR-CODE',
'UNKNOWN-ATTRIBUTES' = []}).
%% Workarounds.
%%-define(NO_PADDING, true).
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