1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
% VFUK-ONW specific mgw_nat actor callback functions
% (C) 2011 by Harald Welte <laforge@gnumonks.org>
% (C) 2011 OnWaves
%
% All Rights Reserved
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU Affero General Public License as
% published by the Free Software Foundation; either version 3 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 Affero General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
%
% Additional Permission under GNU AGPL version 3 section 7:
%
% If you modify this Program, or any covered work, by linking or
% combining it with runtime libraries of Erlang/OTP as released by
% Ericsson on http://www.erlang.org (or a modified version of these
% libraries), containing parts covered by the terms of the Erlang Public
% License (http://www.erlang.org/EPLICENSE), the licensors of this
% Program grant you additional permission to convey the resulting work
% without the need to license the runtime libraries of Erlang/OTP under
% the GNU Affero General Public License. Corresponding Source for a
% non-source form of such a combination shall include the source code
% for the parts of the runtime libraries of Erlang/OTP used as well as
% that of the covered work.
-module(mgw_nat_act_vfuk_onw).
-author("Harald Welte <laforge@gnumonks.org>").
-export([rewrite_actor/5, reload_config/0]).
-export([camelph_twalk_cb/3]).
-include_lib("osmo_map/include/map.hrl").
-include_lib("osmo_ss7/include/sccp.hrl").
% Rewrite at SCTP (root) level:
rewrite_actor(sctp, From, Path, 2, DataBin) ->
try mgw_nat:mangle_rx_data(From, Path, DataBin, fun rewrite_actor/5) of
Val ->
Val
catch error:Error ->
% some parser error, simply forward msg unmodified
error_logger:error_report([{error, Error},
{stacktrace, erlang:get_stacktrace()},
{from, From}, {path, Path},
{data_bin, DataBin}]),
DataBin
end;
% Rewrite at MAP level: call into map_masq module
rewrite_actor(map, From, Path, 0, MapDec) ->
mangle_map_camel_phase(From, Path, MapDec);
% Default action: no rewrite
rewrite_actor(_Level, _From, _Path, _MsgType, Msg) ->
Msg.
mangle_map_camel_phase(from_stp, _Path, MapDec) ->
MapDec;
mangle_map_camel_phase(from_msc, Path, MapDec) ->
% Resolve the Global Title of the SCCP Called Addr
{value, #sccp_msg{parameters = SccpPars}} = lists:keysearch(sccp_msg, 1, Path),
CalledAddr = proplists:get_value(called_party_addr, SccpPars),
{ok, IntTbl} = application:get_env(mgw_nat, int_camel_ph_tbl),
case osmo_ss7_gtt:global_title_match(IntTbl, CalledAddr) of
false ->
MapDec;
PhaseL ->
#global_title{phone_number = PhoneNum} = CalledAddr#sccp_addr.global_title,
PhoneNumInt = osmo_util:digit_list2int(PhoneNum),
io:format("Rewriting Camel Phase List to ~p, GT ~p~n", [PhaseL, PhoneNumInt]),
osmo_util:tuple_walk(MapDec, fun camelph_twalk_cb/3, [PhaseL])
end.
% tuple tree walker callback function
camelph_twalk_cb(['begin','MapSpecificPDUs_begin',basicROS,invoke,
'MapSpecificPDUs_begin_components_SEQOF_basicROS_invoke',
'UpdateLocationArg'], VC = #'VLR-Capability'{}, [PhaseL|_Args]) ->
% Manipulate the VLR capabilities in UpdateLocationArg
VC#'VLR-Capability'{supportedCamelPhases = PhaseL};
camelph_twalk_cb(_Path, Msg, _Args) ->
% Default case: simply return the unmodified tuple
Msg.
gen_int_camelph_tbl(L) ->
gen_int_camelph_tbl(L, []).
gen_int_camelph_tbl([], Out) ->
Out;
gen_int_camelph_tbl([{GttPart, PhasePart}|Tail], Out) ->
GttMatch = osmo_ss7_gtt:'#new-gtt_match'(GttPart),
% Fixme: use ordered insert!
gen_int_camelph_tbl(Tail, Out ++ [{GttMatch, PhasePart}]).
reload_config() ->
{ok, CamelPatchTblIn} = application:get_env(mgw_nat, camel_phase_patch_table),
io:format("VFUK-ONW actor: reloading config ~p~n", [CamelPatchTblIn]),
try gen_int_camelph_tbl(CamelPatchTblIn) of
TblOut ->
application:set_env(mgw_nat, int_camel_ph_tbl, TblOut)
catch error:Error ->
error_logger:error_report([{error, Error},
{stacktrace, erlang:get_stacktrace()}])
end.
|
