import MGW NAT application code into new repository.
All of the code originates from the old omso-er-sccp.git repo.
This commit is contained in:
commit
20ad1ba0c5
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@ -0,0 +1,661 @@
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GNU AFFERO GENERAL PUBLIC LICENSE
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Version 3, 19 November 2007
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Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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Everyone is permitted to copy and distribute verbatim copies
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Preamble
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The GNU Affero General Public License is a free, copyleft license for
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|
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||||||
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||||||
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||||||
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||||||
|
c) Prohibiting misrepresentation of the origin of that material, or
|
||||||
|
requiring that modified versions of such material be marked in
|
||||||
|
reasonable ways as different from the original version; or
|
||||||
|
|
||||||
|
d) Limiting the use for publicity purposes of names of licensors or
|
||||||
|
authors of the material; or
|
||||||
|
|
||||||
|
e) Declining to grant rights under trademark law for use of some
|
||||||
|
trade names, trademarks, or service marks; or
|
||||||
|
|
||||||
|
f) Requiring indemnification of licensors and authors of that
|
||||||
|
material by anyone who conveys the material (or modified versions of
|
||||||
|
it) with contractual assumptions of liability to the recipient, for
|
||||||
|
any liability that these contractual assumptions directly impose on
|
||||||
|
those licensors and authors.
|
||||||
|
|
||||||
|
All other non-permissive additional terms are considered "further
|
||||||
|
restrictions" within the meaning of section 10. If the Program as you
|
||||||
|
received it, or any part of it, contains a notice stating that it is
|
||||||
|
governed by this License along with a term that is a further
|
||||||
|
restriction, you may remove that term. If a license document contains
|
||||||
|
a further restriction but permits relicensing or conveying under this
|
||||||
|
License, you may add to a covered work material governed by the terms
|
||||||
|
of that license document, provided that the further restriction does
|
||||||
|
not survive such relicensing or conveying.
|
||||||
|
|
||||||
|
If you add terms to a covered work in accord with this section, you
|
||||||
|
must place, in the relevant source files, a statement of the
|
||||||
|
additional terms that apply to those files, or a notice indicating
|
||||||
|
where to find the applicable terms.
|
||||||
|
|
||||||
|
Additional terms, permissive or non-permissive, may be stated in the
|
||||||
|
form of a separately written license, or stated as exceptions;
|
||||||
|
the above requirements apply either way.
|
||||||
|
|
||||||
|
8. Termination.
|
||||||
|
|
||||||
|
You may not propagate or modify a covered work except as expressly
|
||||||
|
provided under this License. Any attempt otherwise to propagate or
|
||||||
|
modify it is void, and will automatically terminate your rights under
|
||||||
|
this License (including any patent licenses granted under the third
|
||||||
|
paragraph of section 11).
|
||||||
|
|
||||||
|
However, if you cease all violation of this License, then your
|
||||||
|
license from a particular copyright holder is reinstated (a)
|
||||||
|
provisionally, unless and until the copyright holder explicitly and
|
||||||
|
finally terminates your license, and (b) permanently, if the copyright
|
||||||
|
holder fails to notify you of the violation by some reasonable means
|
||||||
|
prior to 60 days after the cessation.
|
||||||
|
|
||||||
|
Moreover, your license from a particular copyright holder is
|
||||||
|
reinstated permanently if the copyright holder notifies you of the
|
||||||
|
violation by some reasonable means, this is the first time you have
|
||||||
|
received notice of violation of this License (for any work) from that
|
||||||
|
copyright holder, and you cure the violation prior to 30 days after
|
||||||
|
your receipt of the notice.
|
||||||
|
|
||||||
|
Termination of your rights under this section does not terminate the
|
||||||
|
licenses of parties who have received copies or rights from you under
|
||||||
|
this License. If your rights have been terminated and not permanently
|
||||||
|
reinstated, you do not qualify to receive new licenses for the same
|
||||||
|
material under section 10.
|
||||||
|
|
||||||
|
9. Acceptance Not Required for Having Copies.
|
||||||
|
|
||||||
|
You are not required to accept this License in order to receive or
|
||||||
|
run a copy of the Program. Ancillary propagation of a covered work
|
||||||
|
occurring solely as a consequence of using peer-to-peer transmission
|
||||||
|
to receive a copy likewise does not require acceptance. However,
|
||||||
|
nothing other than this License grants you permission to propagate or
|
||||||
|
modify any covered work. These actions infringe copyright if you do
|
||||||
|
not accept this License. Therefore, by modifying or propagating a
|
||||||
|
covered work, you indicate your acceptance of this License to do so.
|
||||||
|
|
||||||
|
10. Automatic Licensing of Downstream Recipients.
|
||||||
|
|
||||||
|
Each time you convey a covered work, the recipient automatically
|
||||||
|
receives a license from the original licensors, to run, modify and
|
||||||
|
propagate that work, subject to this License. You are not responsible
|
||||||
|
for enforcing compliance by third parties with this License.
|
||||||
|
|
||||||
|
An "entity transaction" is a transaction transferring control of an
|
||||||
|
organization, or substantially all assets of one, or subdividing an
|
||||||
|
organization, or merging organizations. If propagation of a covered
|
||||||
|
work results from an entity transaction, each party to that
|
||||||
|
transaction who receives a copy of the work also receives whatever
|
||||||
|
licenses to the work the party's predecessor in interest had or could
|
||||||
|
give under the previous paragraph, plus a right to possession of the
|
||||||
|
Corresponding Source of the work from the predecessor in interest, if
|
||||||
|
the predecessor has it or can get it with reasonable efforts.
|
||||||
|
|
||||||
|
You may not impose any further restrictions on the exercise of the
|
||||||
|
rights granted or affirmed under this License. For example, you may
|
||||||
|
not impose a license fee, royalty, or other charge for exercise of
|
||||||
|
rights granted under this License, and you may not initiate litigation
|
||||||
|
(including a cross-claim or counterclaim in a lawsuit) alleging that
|
||||||
|
any patent claim is infringed by making, using, selling, offering for
|
||||||
|
sale, or importing the Program or any portion of it.
|
||||||
|
|
||||||
|
11. Patents.
|
||||||
|
|
||||||
|
A "contributor" is a copyright holder who authorizes use under this
|
||||||
|
License of the Program or a work on which the Program is based. The
|
||||||
|
work thus licensed is called the contributor's "contributor version".
|
||||||
|
|
||||||
|
A contributor's "essential patent claims" are all patent claims
|
||||||
|
owned or controlled by the contributor, whether already acquired or
|
||||||
|
hereafter acquired, that would be infringed by some manner, permitted
|
||||||
|
by this License, of making, using, or selling its contributor version,
|
||||||
|
but do not include claims that would be infringed only as a
|
||||||
|
consequence of further modification of the contributor version. For
|
||||||
|
purposes of this definition, "control" includes the right to grant
|
||||||
|
patent sublicenses in a manner consistent with the requirements of
|
||||||
|
this License.
|
||||||
|
|
||||||
|
Each contributor grants you a non-exclusive, worldwide, royalty-free
|
||||||
|
patent license under the contributor's essential patent claims, to
|
||||||
|
make, use, sell, offer for sale, import and otherwise run, modify and
|
||||||
|
propagate the contents of its contributor version.
|
||||||
|
|
||||||
|
In the following three paragraphs, a "patent license" is any express
|
||||||
|
agreement or commitment, however denominated, not to enforce a patent
|
||||||
|
(such as an express permission to practice a patent or covenant not to
|
||||||
|
sue for patent infringement). To "grant" such a patent license to a
|
||||||
|
party means to make such an agreement or commitment not to enforce a
|
||||||
|
patent against the party.
|
||||||
|
|
||||||
|
If you convey a covered work, knowingly relying on a patent license,
|
||||||
|
and the Corresponding Source of the work is not available for anyone
|
||||||
|
to copy, free of charge and under the terms of this License, through a
|
||||||
|
publicly available network server or other readily accessible means,
|
||||||
|
then you must either (1) cause the Corresponding Source to be so
|
||||||
|
available, or (2) arrange to deprive yourself of the benefit of the
|
||||||
|
patent license for this particular work, or (3) arrange, in a manner
|
||||||
|
consistent with the requirements of this License, to extend the patent
|
||||||
|
license to downstream recipients. "Knowingly relying" means you have
|
||||||
|
actual knowledge that, but for the patent license, your conveying the
|
||||||
|
covered work in a country, or your recipient's use of the covered work
|
||||||
|
in a country, would infringe one or more identifiable patents in that
|
||||||
|
country that you have reason to believe are valid.
|
||||||
|
|
||||||
|
If, pursuant to or in connection with a single transaction or
|
||||||
|
arrangement, you convey, or propagate by procuring conveyance of, a
|
||||||
|
covered work, and grant a patent license to some of the parties
|
||||||
|
receiving the covered work authorizing them to use, propagate, modify
|
||||||
|
or convey a specific copy of the covered work, then the patent license
|
||||||
|
you grant is automatically extended to all recipients of the covered
|
||||||
|
work and works based on it.
|
||||||
|
|
||||||
|
A patent license is "discriminatory" if it does not include within
|
||||||
|
the scope of its coverage, prohibits the exercise of, or is
|
||||||
|
conditioned on the non-exercise of one or more of the rights that are
|
||||||
|
specifically granted under this License. You may not convey a covered
|
||||||
|
work if you are a party to an arrangement with a third party that is
|
||||||
|
in the business of distributing software, under which you make payment
|
||||||
|
to the third party based on the extent of your activity of conveying
|
||||||
|
the work, and under which the third party grants, to any of the
|
||||||
|
parties who would receive the covered work from you, a discriminatory
|
||||||
|
patent license (a) in connection with copies of the covered work
|
||||||
|
conveyed by you (or copies made from those copies), or (b) primarily
|
||||||
|
for and in connection with specific products or compilations that
|
||||||
|
contain the covered work, unless you entered into that arrangement,
|
||||||
|
or that patent license was granted, prior to 28 March 2007.
|
||||||
|
|
||||||
|
Nothing in this License shall be construed as excluding or limiting
|
||||||
|
any implied license or other defenses to infringement that may
|
||||||
|
otherwise be available to you under applicable patent law.
|
||||||
|
|
||||||
|
12. No Surrender of Others' Freedom.
|
||||||
|
|
||||||
|
If conditions are imposed on you (whether by court order, agreement or
|
||||||
|
otherwise) that contradict the conditions of this License, they do not
|
||||||
|
excuse you from the conditions of this License. If you cannot convey a
|
||||||
|
covered work so as to satisfy simultaneously your obligations under this
|
||||||
|
License and any other pertinent obligations, then as a consequence you may
|
||||||
|
not convey it at all. For example, if you agree to terms that obligate you
|
||||||
|
to collect a royalty for further conveying from those to whom you convey
|
||||||
|
the Program, the only way you could satisfy both those terms and this
|
||||||
|
License would be to refrain entirely from conveying the Program.
|
||||||
|
|
||||||
|
13. Remote Network Interaction; Use with the GNU General Public License.
|
||||||
|
|
||||||
|
Notwithstanding any other provision of this License, if you modify the
|
||||||
|
Program, your modified version must prominently offer all users
|
||||||
|
interacting with it remotely through a computer network (if your version
|
||||||
|
supports such interaction) an opportunity to receive the Corresponding
|
||||||
|
Source of your version by providing access to the Corresponding Source
|
||||||
|
from a network server at no charge, through some standard or customary
|
||||||
|
means of facilitating copying of software. This Corresponding Source
|
||||||
|
shall include the Corresponding Source for any work covered by version 3
|
||||||
|
of the GNU General Public License that is incorporated pursuant to the
|
||||||
|
following paragraph.
|
||||||
|
|
||||||
|
Notwithstanding any other provision of this License, you have
|
||||||
|
permission to link or combine any covered work with a work licensed
|
||||||
|
under version 3 of the GNU General Public License into a single
|
||||||
|
combined work, and to convey the resulting work. The terms of this
|
||||||
|
License will continue to apply to the part which is the covered work,
|
||||||
|
but the work with which it is combined will remain governed by version
|
||||||
|
3 of the GNU General Public License.
|
||||||
|
|
||||||
|
14. Revised Versions of this License.
|
||||||
|
|
||||||
|
The Free Software Foundation may publish revised and/or new versions of
|
||||||
|
the GNU Affero General Public License from time to time. Such new versions
|
||||||
|
will be similar in spirit to the present version, but may differ in detail to
|
||||||
|
address new problems or concerns.
|
||||||
|
|
||||||
|
Each version is given a distinguishing version number. If the
|
||||||
|
Program specifies that a certain numbered version of the GNU Affero General
|
||||||
|
Public License "or any later version" applies to it, you have the
|
||||||
|
option of following the terms and conditions either of that numbered
|
||||||
|
version or of any later version published by the Free Software
|
||||||
|
Foundation. If the Program does not specify a version number of the
|
||||||
|
GNU Affero General Public License, you may choose any version ever published
|
||||||
|
by the Free Software Foundation.
|
||||||
|
|
||||||
|
If the Program specifies that a proxy can decide which future
|
||||||
|
versions of the GNU Affero General Public License can be used, that proxy's
|
||||||
|
public statement of acceptance of a version permanently authorizes you
|
||||||
|
to choose that version for the Program.
|
||||||
|
|
||||||
|
Later license versions may give you additional or different
|
||||||
|
permissions. However, no additional obligations are imposed on any
|
||||||
|
author or copyright holder as a result of your choosing to follow a
|
||||||
|
later version.
|
||||||
|
|
||||||
|
15. Disclaimer of Warranty.
|
||||||
|
|
||||||
|
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
||||||
|
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
||||||
|
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
||||||
|
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
||||||
|
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||||
|
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
||||||
|
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
||||||
|
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||||
|
|
||||||
|
16. Limitation of Liability.
|
||||||
|
|
||||||
|
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||||
|
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
||||||
|
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
||||||
|
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
||||||
|
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
||||||
|
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
||||||
|
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
||||||
|
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
||||||
|
SUCH DAMAGES.
|
||||||
|
|
||||||
|
17. Interpretation of Sections 15 and 16.
|
||||||
|
|
||||||
|
If the disclaimer of warranty and limitation of liability provided
|
||||||
|
above cannot be given local legal effect according to their terms,
|
||||||
|
reviewing courts shall apply local law that most closely approximates
|
||||||
|
an absolute waiver of all civil liability in connection with the
|
||||||
|
Program, unless a warranty or assumption of liability accompanies a
|
||||||
|
copy of the Program in return for a fee.
|
||||||
|
|
||||||
|
END OF TERMS AND CONDITIONS
|
||||||
|
|
||||||
|
How to Apply These Terms to Your New Programs
|
||||||
|
|
||||||
|
If you develop a new program, and you want it to be of the greatest
|
||||||
|
possible use to the public, the best way to achieve this is to make it
|
||||||
|
free software which everyone can redistribute and change under these terms.
|
||||||
|
|
||||||
|
To do so, attach the following notices to the program. It is safest
|
||||||
|
to attach them to the start of each source file to most effectively
|
||||||
|
state the exclusion of warranty; and each file should have at least
|
||||||
|
the "copyright" line and a pointer to where the full notice is found.
|
||||||
|
|
||||||
|
<one line to give the program's name and a brief idea of what it does.>
|
||||||
|
Copyright (C) <year> <name of author>
|
||||||
|
|
||||||
|
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 Affero 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/>.
|
||||||
|
|
||||||
|
Also add information on how to contact you by electronic and paper mail.
|
||||||
|
|
||||||
|
If your software can interact with users remotely through a computer
|
||||||
|
network, you should also make sure that it provides a way for users to
|
||||||
|
get its source. For example, if your program is a web application, its
|
||||||
|
interface could display a "Source" link that leads users to an archive
|
||||||
|
of the code. There are many ways you could offer source, and different
|
||||||
|
solutions will be better for different programs; see section 13 for the
|
||||||
|
specific requirements.
|
||||||
|
|
||||||
|
You should also get your employer (if you work as a programmer) or school,
|
||||||
|
if any, to sign a "copyright disclaimer" for the program, if necessary.
|
||||||
|
For more information on this, and how to apply and follow the GNU AGPL, see
|
||||||
|
<http://www.gnu.org/licenses/>.
|
|
@ -0,0 +1,8 @@
|
||||||
|
{release,
|
||||||
|
{"mgw_nat", "A"},
|
||||||
|
{erts, "5.3"},
|
||||||
|
[{kernel, "2.14"},
|
||||||
|
{stdlib, "1.17"},
|
||||||
|
{sasl, "2.1.9.2"},
|
||||||
|
{mgw_nat, "1"}]
|
||||||
|
}.
|
|
@ -0,0 +1,31 @@
|
||||||
|
{application, mgw_nat,
|
||||||
|
[{description, "Media Gateway NAT"},
|
||||||
|
{vsn, "1"},
|
||||||
|
{modules, [mgw_nat_app, mgw_nat_sup, mgw_nat_usr, mgw_nat, sccp_masq]},
|
||||||
|
{registered, [mgw_nat_app]},
|
||||||
|
{mod, {mgw_nat_app, []}},
|
||||||
|
{applications, [osmo_ss7]},
|
||||||
|
{env, [
|
||||||
|
% SCCP static rewrite rules
|
||||||
|
{sccp_rewrite_tbl, [
|
||||||
|
{ 12340000, 98760000, "HLR" },
|
||||||
|
{ 12340001, 98760001, "VLR" }
|
||||||
|
]},
|
||||||
|
|
||||||
|
% SCCP source masquerading pool
|
||||||
|
{sccp_masq_gt_base, 12340000},
|
||||||
|
{sccp_masq_gt_max, 9999},
|
||||||
|
|
||||||
|
% ISUP rewrite
|
||||||
|
{msrn_pfx_msc, 35489099},
|
||||||
|
{msrn_pfx_stp, 6392994200},
|
||||||
|
{intern_pfx, 63},
|
||||||
|
|
||||||
|
% SCTP / IP config
|
||||||
|
{msc_local_ip, any},
|
||||||
|
{msc_local_port, 2904},
|
||||||
|
{msc_remote_ip, {172,16,1,81}},
|
||||||
|
{stp_remote_ip, {172,16,249,20}},
|
||||||
|
{stp_remote_port, 2904}
|
||||||
|
]}
|
||||||
|
]}.
|
|
@ -0,0 +1,4 @@
|
||||||
|
{sub_dirs, ["rel"]}.
|
||||||
|
{deps, [
|
||||||
|
{osmo_ss7, "1", {git, "git://git.osmocom.org/erlang/osmo-er-sccp", "master"}}
|
||||||
|
]}.
|
|
@ -0,0 +1,294 @@
|
||||||
|
%
|
||||||
|
|
||||||
|
% (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/>.
|
||||||
|
|
||||||
|
-module(mgw_nat).
|
||||||
|
-author("Harald Welte <laforge@gnumonks.org>").
|
||||||
|
-export([mangle_rx_data/3]).
|
||||||
|
|
||||||
|
%-include_lib("kernel/include/inet.hrl").
|
||||||
|
%-include_lib("kernel/include/inet_sctp.hrl").
|
||||||
|
|
||||||
|
-include("m2ua.hrl").
|
||||||
|
-include("mtp3.hrl").
|
||||||
|
-include("isup.hrl").
|
||||||
|
-include("sccp.hrl").
|
||||||
|
|
||||||
|
% mangle the received data
|
||||||
|
mangle_rx_data(L, From, Data) when is_binary(Data) ->
|
||||||
|
{ok, M2ua} = m2ua_codec:parse_m2ua_msg(Data),
|
||||||
|
%io:format("M2UA Decode: ~p~n", [M2ua]),
|
||||||
|
case M2ua of
|
||||||
|
#m2ua_msg{msg_class = ?M2UA_MSGC_MAUP,
|
||||||
|
msg_type = ?M2UA_MAUP_MSGT_DATA} ->
|
||||||
|
M2ua_out = mangle_rx_m2ua_maup(L, From, M2ua);
|
||||||
|
#m2ua_msg{} ->
|
||||||
|
% simply pass it along unmodified
|
||||||
|
M2ua_out = M2ua
|
||||||
|
end,
|
||||||
|
% re-encode the data
|
||||||
|
%io:format("M2UA Encode: ~p~n", [M2ua_out]),
|
||||||
|
m2ua_codec:encode_m2ua_msg(M2ua_out).
|
||||||
|
|
||||||
|
% mangle the received M2UA
|
||||||
|
mangle_rx_m2ua_maup(L, From, M2ua = #m2ua_msg{parameters = Params}) ->
|
||||||
|
{_Len, M2uaPayload} = proplists:get_value(16#300, Params),
|
||||||
|
Mtp3 = mtp3_codec:parse_mtp3_msg(M2uaPayload),
|
||||||
|
%io:format("MTP3 Decode: ~p~n", [Mtp3]),
|
||||||
|
Mtp3_out = mangle_rx_mtp3(L, From, Mtp3),
|
||||||
|
%io:format("MTP3 Encode: ~p~n", [Mtp3_out]),
|
||||||
|
Mtp3OutBin = mtp3_codec:encode_mtp3_msg(Mtp3_out),
|
||||||
|
Params2 = proplists:delete(16#300, Params),
|
||||||
|
ParamsNew = Params2 ++ [{16#300, {byte_size(Mtp3OutBin), Mtp3OutBin}}],
|
||||||
|
% return mangled parsed m2ua msg
|
||||||
|
M2ua#m2ua_msg{parameters = ParamsNew}.
|
||||||
|
|
||||||
|
% mangle the MTP3 payload
|
||||||
|
mangle_rx_mtp3(L, From, Mtp3 = #mtp3_msg{service_ind = Service}) ->
|
||||||
|
mangle_rx_mtp3_serv(L, From, Service, Mtp3).
|
||||||
|
|
||||||
|
% mangle the ISUP content
|
||||||
|
mangle_rx_mtp3_serv(_L, From, ?MTP3_SERV_ISUP, Mtp3 = #mtp3_msg{payload = Payload}) ->
|
||||||
|
io:format("ISUP In: ~p~n", [Payload]),
|
||||||
|
Isup = isup_codec:parse_isup_msg(Payload),
|
||||||
|
io:format("ISUP Decode: ~p~n", [Isup]),
|
||||||
|
% FIXME
|
||||||
|
IsupMangled = mangle_rx_isup(From, Isup#isup_msg.msg_type, Isup),
|
||||||
|
if IsupMangled == Isup ->
|
||||||
|
Mtp3;
|
||||||
|
true ->
|
||||||
|
io:format("ISUP Encode In: ~p~n", [IsupMangled]),
|
||||||
|
Payload_out = isup_codec:encode_isup_msg(IsupMangled),
|
||||||
|
io:format("ISUP Encode Out: ~p~n", [Payload_out]),
|
||||||
|
% return modified MTP3 payload
|
||||||
|
Mtp3#mtp3_msg{payload = Payload_out}
|
||||||
|
end;
|
||||||
|
% mangle the SCCP content
|
||||||
|
mangle_rx_mtp3_serv(_L, From, ?MTP3_SERV_SCCP, Mtp3 = #mtp3_msg{payload = Payload}) ->
|
||||||
|
io:format("SCCP In: ~p~n", [Payload]),
|
||||||
|
{ok, Sccp} = sccp_codec:parse_sccp_msg(Payload),
|
||||||
|
io:format("SCCP Decode: ~p~n", [Sccp]),
|
||||||
|
SccpMangled = mangle_rx_sccp(From, Sccp#sccp_msg.msg_type, Sccp),
|
||||||
|
SccpMasqued = sccp_masq:sccp_masq_msg(From, SccpMangled#sccp_msg.msg_type,
|
||||||
|
SccpMangled),
|
||||||
|
if SccpMasqued == Sccp ->
|
||||||
|
Mtp3;
|
||||||
|
true ->
|
||||||
|
io:format("SCCP Encode In: ~p~n", [SccpMasqued]),
|
||||||
|
Payload_out = sccp_codec:encode_sccp_msg(SccpMasqued),
|
||||||
|
io:format("SCCP Encode Out: ~p~n", [Payload_out]),
|
||||||
|
% return modified MTP3 payload
|
||||||
|
Mtp3#mtp3_msg{payload = Payload_out}
|
||||||
|
end;
|
||||||
|
% default: do nothing
|
||||||
|
mangle_rx_mtp3_serv(_L, _From, _, Mtp3) ->
|
||||||
|
Mtp3.
|
||||||
|
|
||||||
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||||
|
% Actual mangling of the decoded SCCP messages
|
||||||
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||||
|
|
||||||
|
% iterate over list of rewrite tuples and apply translation if there is a match
|
||||||
|
do_sccp_gt_rewrite(GT, _From, []) ->
|
||||||
|
GT;
|
||||||
|
do_sccp_gt_rewrite(GT = #global_title{phone_number = PhoneNum}, from_stp, [Head|List]) ->
|
||||||
|
{MscSide, StpSide, Comment} = Head,
|
||||||
|
if PhoneNum == StpSide ->
|
||||||
|
NewPhoneNum = MscSide,
|
||||||
|
io:format("SCCP STP->MSC rewrite (~p) ~p -> ~p~n",
|
||||||
|
[Comment, PhoneNum, NewPhoneNum]),
|
||||||
|
GT#global_title{phone_number = NewPhoneNum};
|
||||||
|
true ->
|
||||||
|
do_sccp_gt_rewrite(GT, from_stp, List)
|
||||||
|
end;
|
||||||
|
do_sccp_gt_rewrite(GT = #global_title{phone_number = PhoneNum}, from_msc, [Head|List]) ->
|
||||||
|
{MscSide, StpSide, Comment} = Head,
|
||||||
|
if PhoneNum == MscSide ->
|
||||||
|
NewPhoneNum = StpSide,
|
||||||
|
io:format("SCCP MSC->STP rewrite (~p) ~p -> ~p~n",
|
||||||
|
[Comment, PhoneNum, NewPhoneNum]),
|
||||||
|
GT#global_title{phone_number = NewPhoneNum};
|
||||||
|
true ->
|
||||||
|
do_sccp_gt_rewrite(GT, from_msc, List)
|
||||||
|
end.
|
||||||
|
|
||||||
|
% mangle called address
|
||||||
|
mangle_rx_called(from_stp, Addr = #sccp_addr{global_title = GT}) ->
|
||||||
|
{ok, RewriteTbl} = application:get_env(sccp_rewrite_tbl),
|
||||||
|
GTout = do_sccp_gt_rewrite(GT, from_stp, RewriteTbl),
|
||||||
|
Addr#sccp_addr{global_title = GTout};
|
||||||
|
mangle_rx_called(_From, Addr) ->
|
||||||
|
Addr.
|
||||||
|
|
||||||
|
% mangle calling address
|
||||||
|
mangle_rx_calling(from_msc, Addr = #sccp_addr{global_title = GT}) ->
|
||||||
|
{ok, RewriteTbl} = application:get_env(sccp_rewrite_tbl),
|
||||||
|
GTout = do_sccp_gt_rewrite(GT, from_msc, RewriteTbl),
|
||||||
|
Addr#sccp_addr{global_title = GTout};
|
||||||
|
mangle_rx_calling(_From, Addr) ->
|
||||||
|
Addr.
|
||||||
|
|
||||||
|
mangle_rx_sccp(From, ?SCCP_MSGT_UDT, Msg = #sccp_msg{parameters = Opts}) ->
|
||||||
|
CalledParty = proplists:get_value(called_party_addr, Opts),
|
||||||
|
CalledPartyNew = mangle_rx_called(From, CalledParty),
|
||||||
|
CallingParty = proplists:get_value(calling_party_addr, Opts),
|
||||||
|
CallingPartyNew = mangle_rx_calling(From, CallingParty),
|
||||||
|
Opts1 = lists:keyreplace(called_party_addr, 1, Opts,
|
||||||
|
{called_party_addr, CalledPartyNew}),
|
||||||
|
Opts2 = lists:keyreplace(calling_party_addr, 1, Opts1,
|
||||||
|
{calling_party_addr, CallingPartyNew}),
|
||||||
|
Msg#sccp_msg{parameters = Opts2};
|
||||||
|
mangle_rx_sccp(_From, _MsgType, Msg) ->
|
||||||
|
Msg.
|
||||||
|
|
||||||
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||||
|
% Actual mangling of the decoded ISUP messages
|
||||||
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||||
|
|
||||||
|
% iterate over list of parameters and call mangle_rx_isup_par() for each one
|
||||||
|
mangle_rx_isup_params(_From, _MsgType, _Msg, ParListOut, []) ->
|
||||||
|
ParListOut;
|
||||||
|
mangle_rx_isup_params(From, MsgType, Msg, ParListOut, [Par|ParList]) ->
|
||||||
|
ParOut = mangle_rx_isup_par(From, MsgType, Msg, Par),
|
||||||
|
mangle_rx_isup_params(From, MsgType, Msg, ParListOut++[ParOut], ParList).
|
||||||
|
|
||||||
|
% manipulate phone numbers
|
||||||
|
mangle_rx_isup_par(From, MsgType, _Msg, {ParType, ParBody}) when
|
||||||
|
ParType == ?ISUP_PAR_CALLED_P_NUM;
|
||||||
|
ParType == ?ISUP_PAR_CONNECTED_NUM;
|
||||||
|
ParType == ?ISUP_PAR_CALLING_P_NUM ->
|
||||||
|
NewParBody = mangle_isup_number(From, MsgType, ParType, ParBody),
|
||||||
|
{ParType, NewParBody};
|
||||||
|
% defauly case: do not mangle this parameter
|
||||||
|
mangle_rx_isup_par(_From, _MsgType, _Msg, Par) ->
|
||||||
|
Par.
|
||||||
|
|
||||||
|
% mangle an incoming ISUP message
|
||||||
|
mangle_rx_isup(From, MsgType, Msg = #isup_msg{parameters = Params}) ->
|
||||||
|
ParamsOut = mangle_rx_isup_params(From, MsgType, Msg, [], Params),
|
||||||
|
% return message with modified parameter list
|
||||||
|
Msg#isup_msg{parameters = ParamsOut}.
|
||||||
|
|
||||||
|
% STP->MSC: Mangle a Party Number in IAM
|
||||||
|
mangle_isup_number(from_stp, ?ISUP_MSGT_IAM, NumType, PartyNum) ->
|
||||||
|
case NumType of
|
||||||
|
?ISUP_PAR_CALLED_P_NUM ->
|
||||||
|
% First convert to international number, if it is national
|
||||||
|
Num1 = isup_party_internationalize(PartyNum,
|
||||||
|
application:get_env(intern_pfx)),
|
||||||
|
io:format("IAM MSRN rewrite (STP->MSC): "),
|
||||||
|
isup_party_replace_prefix(Num1,
|
||||||
|
application:get_env(msrn_pfx_stp),
|
||||||
|
application:get_env(msrn_pfx_msc));
|
||||||
|
_ ->
|
||||||
|
PartyNum
|
||||||
|
end;
|
||||||
|
% MSC->STP: Mangle connected number in response to IAM
|
||||||
|
mangle_isup_number(from_msc, MsgT, NumType, PartyNum) when MsgT == ?ISUP_MSGT_CON;
|
||||||
|
MsgT == ?ISUP_MSGT_ANM ->
|
||||||
|
case NumType of
|
||||||
|
?ISUP_PAR_CONNECTED_NUM ->
|
||||||
|
io:format("CON MSRN rewrite (MSC->STP): "),
|
||||||
|
Num1 = isup_party_replace_prefix(PartyNum,
|
||||||
|
application:get_env(msrn_pfx_msc),
|
||||||
|
application:get_env(msrn_pfx_stp)),
|
||||||
|
% Second: convert to national number, if it is international
|
||||||
|
isup_party_nationalize(Num1,
|
||||||
|
application:get_env(intern_pfx));
|
||||||
|
_ ->
|
||||||
|
PartyNum
|
||||||
|
end;
|
||||||
|
% MAC->STP: Mangle IAM international -> national
|
||||||
|
mangle_isup_number(from_msc, ?ISUP_MSGT_IAM, NumType, PartyNum) ->
|
||||||
|
case NumType of
|
||||||
|
?ISUP_PAR_CALLED_P_NUM ->
|
||||||
|
isup_party_nationalize(PartyNum,
|
||||||
|
applicaiton:get_env(intern_pfx));
|
||||||
|
_ ->
|
||||||
|
PartyNum
|
||||||
|
end;
|
||||||
|
% STP->MSC: Mangle connected number in response to IAM (national->international)
|
||||||
|
mangle_isup_number(from_stp, MsgT, NumType, PartyNum) when MsgT == ?ISUP_MSGT_CON;
|
||||||
|
MsgT == ?ISUP_MSGT_ANM ->
|
||||||
|
case NumType of
|
||||||
|
?ISUP_PAR_CONNECTED_NUM ->
|
||||||
|
isup_party_internationalize(PartyNum,
|
||||||
|
application:get_env(intern_pfx));
|
||||||
|
_ ->
|
||||||
|
PartyNum
|
||||||
|
end;
|
||||||
|
% default case: no rewrite
|
||||||
|
mangle_isup_number(from_msc, _, _, PartyNum) ->
|
||||||
|
PartyNum.
|
||||||
|
|
||||||
|
% replace the prefix of PartyNum with NewPfx _if_ the current prefix matches MatchPfx
|
||||||
|
isup_party_replace_prefix(PartyNum, MatchPfx, NewPfxInt) ->
|
||||||
|
IntIn = PartyNum#party_number.phone_number,
|
||||||
|
DigitsIn = osmo_util:int2digit_list(IntIn),
|
||||||
|
NewPfx = osmo_util:int2digit_list(NewPfxInt),
|
||||||
|
MatchPfxLen = length(MatchPfx),
|
||||||
|
Pfx = lists:sublist(DigitsIn, 1, MatchPfxLen),
|
||||||
|
if Pfx == MatchPfx ->
|
||||||
|
Trailer = lists:sublist(DigitsIn, MatchPfxLen+1, length(DigitsIn)-MatchPfxLen),
|
||||||
|
DigitsOut = NewPfx ++ Trailer,
|
||||||
|
io:format("Prefix rewrite: ~p -> ~p~n", [DigitsIn, DigitsOut]);
|
||||||
|
true ->
|
||||||
|
io:format("Prefix rewrite: NO MATCH (~p != ~p)~n", [Pfx, MatchPfx]),
|
||||||
|
DigitsOut = DigitsIn
|
||||||
|
end,
|
||||||
|
IntOut = osmo_util:digit_list2int(DigitsOut),
|
||||||
|
PartyNum#party_number{phone_number = IntOut}.
|
||||||
|
|
||||||
|
isup_party_internationalize(PartyNum, CountryCode) ->
|
||||||
|
#party_number{phone_number = IntIn, nature_of_addr_ind = Nature} = PartyNum,
|
||||||
|
DigitsIn = osmo_util:int2digit_list(IntIn),
|
||||||
|
case Nature of
|
||||||
|
?ISUP_ADDR_NAT_NATIONAL ->
|
||||||
|
DigitsOut = CountryCode ++ DigitsIn,
|
||||||
|
NatureOut = ?ISUP_ADDR_NAT_INTERNATIONAL,
|
||||||
|
io:format("Internationalize: ~p -> ~p~n", [DigitsIn, DigitsOut]);
|
||||||
|
_ ->
|
||||||
|
DigitsOut = DigitsIn,
|
||||||
|
NatureOut = Nature
|
||||||
|
end,
|
||||||
|
IntOut = osmo_util:digit_list2int(DigitsOut),
|
||||||
|
PartyNum#party_number{phone_number = IntOut, nature_of_addr_ind = NatureOut}.
|
||||||
|
|
||||||
|
isup_party_nationalize(PartyNum, CountryCode) ->
|
||||||
|
#party_number{phone_number = IntIn, nature_of_addr_ind = Nature} = PartyNum,
|
||||||
|
DigitsIn = osmo_util:int2digit_list(IntIn),
|
||||||
|
CountryCodeLen = length(CountryCode),
|
||||||
|
case Nature of
|
||||||
|
?ISUP_ADDR_NAT_INTERNATIONAL ->
|
||||||
|
Pfx = lists:sublist(DigitsIn, CountryCodeLen),
|
||||||
|
if Pfx == CountryCode ->
|
||||||
|
DigitsOut = lists:sublist(DigitsIn, CountryCodeLen+1,
|
||||||
|
length(DigitsIn)-CountryCodeLen),
|
||||||
|
NatureOut = ?ISUP_ADDR_NAT_NATIONAL,
|
||||||
|
io:format("Nationalize: ~p -> ~p~n", [DigitsIn, DigitsOut]);
|
||||||
|
true ->
|
||||||
|
DigitsOut = DigitsIn,
|
||||||
|
NatureOut = Nature
|
||||||
|
end;
|
||||||
|
_ ->
|
||||||
|
DigitsOut = DigitsIn,
|
||||||
|
NatureOut = Nature
|
||||||
|
end,
|
||||||
|
IntOut = osmo_util:digit_list2int(DigitsOut),
|
||||||
|
PartyNum#party_number{phone_number = IntOut, nature_of_addr_ind = NatureOut}.
|
|
@ -0,0 +1,16 @@
|
||||||
|
-module(mgw_nat_app).
|
||||||
|
-behavior(application).
|
||||||
|
-export([start/2, stop/1]).
|
||||||
|
|
||||||
|
-export([reload_config/0]).
|
||||||
|
|
||||||
|
start(_Type, _Args) ->
|
||||||
|
Sup = mgw_nat_sup:start_link(),
|
||||||
|
io:format("Sup ~p~n", [Sup]),
|
||||||
|
Sup.
|
||||||
|
|
||||||
|
stop(_State) ->
|
||||||
|
ok.
|
||||||
|
|
||||||
|
reload_config() ->
|
||||||
|
osmo_util:reload_config().
|
|
@ -0,0 +1,40 @@
|
||||||
|
% OTP Supervisor for MGW NAT
|
||||||
|
|
||||||
|
% (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/>.
|
||||||
|
|
||||||
|
-module(mgw_nat_sup).
|
||||||
|
-behavior(supervisor).
|
||||||
|
|
||||||
|
-export([start_link/0]).
|
||||||
|
-export([init/1]).
|
||||||
|
|
||||||
|
start_link() ->
|
||||||
|
supervisor:start_link({local, ?MODULE}, ?MODULE, []).
|
||||||
|
|
||||||
|
init(_Arg) ->
|
||||||
|
{ok, MscLocalIp} = application:get_env(msc_local_ip),
|
||||||
|
{ok, MscLocalPort} = application:get_env(msc_local_port),
|
||||||
|
{ok, MscRemoteIp} = application:get_env(msc_remote_ip),
|
||||||
|
{ok, StpRemoteIp} = application:get_env(stp_remote_ip),
|
||||||
|
{ok, StpRemotePort} = application:get_env(stp_remote_port),
|
||||||
|
SctpHdlrArgs = [MscLocalIp, MscLocalPort, MscRemoteIp,
|
||||||
|
StpRemoteIp, StpRemotePort],
|
||||||
|
MgwChild = {mgw_nat_usr, {mgw_nat_usr, start_link, [SctpHdlrArgs]},
|
||||||
|
permanent, 2000, worker, [mgw_nat_usr, sctp_handler, mgw_nat]},
|
||||||
|
{ok,{{one_for_all,1,1}, [MgwChild]}}.
|
|
@ -0,0 +1,59 @@
|
||||||
|
% Wrapper code, wrapping sctp_handler.erl into OTP gen_server
|
||||||
|
|
||||||
|
% (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/>.
|
||||||
|
|
||||||
|
-module(mgw_nat_usr).
|
||||||
|
-author("Harald Welte <laforge@gnumonks.org>").
|
||||||
|
|
||||||
|
-behavior(gen_server).
|
||||||
|
|
||||||
|
-export([start_link/1, stop/0, sccp_masq_reset/0]).
|
||||||
|
-export([init/1, handle_cast/2, handle_info/2, terminate/2]).
|
||||||
|
|
||||||
|
|
||||||
|
start_link(Params) ->
|
||||||
|
gen_server:start_link({local, ?MODULE}, ?MODULE, Params, []).
|
||||||
|
|
||||||
|
stop() ->
|
||||||
|
gen_server:cast(?MODULE, stop).
|
||||||
|
|
||||||
|
sccp_masq_reset() ->
|
||||||
|
gen_server:cast(?MODULE, sccp_masq_reset).
|
||||||
|
|
||||||
|
|
||||||
|
%% Callback functions of the OTP behavior
|
||||||
|
|
||||||
|
init(Params) ->
|
||||||
|
sccp_masq:init(),
|
||||||
|
apply(sctp_handler, init, Params).
|
||||||
|
|
||||||
|
handle_cast(stop, LoopData) ->
|
||||||
|
{stop, normal, LoopData};
|
||||||
|
|
||||||
|
handle_cast(sccp_masq_reset, LoopData) ->
|
||||||
|
sccp_masq:reset(),
|
||||||
|
{noreply, LoopData}.
|
||||||
|
|
||||||
|
terminate(_Reason, _LoopData) ->
|
||||||
|
ok.
|
||||||
|
|
||||||
|
% callback for other events like incoming SCTP message
|
||||||
|
handle_info({sctp, Sock, Ip, Port, Data}, LoopData) ->
|
||||||
|
NewL = sctp_handler:handle_sctp(LoopData, {sctp, Sock, Ip, Port, Data}),
|
||||||
|
{noreply, NewL}.
|
|
@ -0,0 +1,132 @@
|
||||||
|
% ITU-T Q.71x SCCP UDT stateful masquerading
|
||||||
|
|
||||||
|
% (C) 2011 by Harald Welte <laforge@gnumonks.org>
|
||||||
|
%
|
||||||
|
% 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/>.
|
||||||
|
|
||||||
|
-module(sccp_masq).
|
||||||
|
-author('Harald Welte <laforge@gnumonks.org>').
|
||||||
|
-include("sccp.hrl").
|
||||||
|
|
||||||
|
-export([sccp_masq_msg/3, init/0, reset/0]).
|
||||||
|
|
||||||
|
-compile([export_all]).
|
||||||
|
|
||||||
|
-record(sccp_masq_rec, {
|
||||||
|
digits_in, % list of GT digits
|
||||||
|
digits_out, % list of GT digits
|
||||||
|
last_access % timestamp of last usage
|
||||||
|
}).
|
||||||
|
|
||||||
|
% alloc + insert a new masquerade state record in our tables
|
||||||
|
masq_alloc(DigitsOrig) ->
|
||||||
|
{ok, Base} = application:get_env(sccp_masq_gt_base),
|
||||||
|
{ok, Max} = application:get_env(sccp_masq_gt_max),
|
||||||
|
masq_try_alloc(DigitsOrig, Base, Max, 0).
|
||||||
|
masq_try_alloc(_DigitsOrig, _Base, Max, Offset) when Offset > Max ->
|
||||||
|
undef;
|
||||||
|
masq_try_alloc(DigitsOrig, Base, Max, Offset) ->
|
||||||
|
Try = Base + Offset,
|
||||||
|
EtsRet = ets:insert_new(get(sccp_masq_orig),
|
||||||
|
#sccp_masq_rec{digits_in = DigitsOrig,
|
||||||
|
digits_out = Try}),
|
||||||
|
case EtsRet of
|
||||||
|
false ->
|
||||||
|
masq_try_alloc(DigitsOrig, Base, Max, Offset+1);
|
||||||
|
_ ->
|
||||||
|
ets:insert(get(sccp_masq_rev),
|
||||||
|
#sccp_masq_rec{digits_in = Try,
|
||||||
|
digits_out = DigitsOrig}),
|
||||||
|
Try
|
||||||
|
end.
|
||||||
|
|
||||||
|
% lookup a masqerade state record
|
||||||
|
lookup_masq_addr(orig, GtDigits) ->
|
||||||
|
case ets:lookup(get(sccp_masq_orig), GtDigits) of
|
||||||
|
[#sccp_masq_rec{digits_out = DigitsOut}] ->
|
||||||
|
DigitsOut;
|
||||||
|
_ ->
|
||||||
|
% allocate a new masq GT
|
||||||
|
masq_alloc(GtDigits)
|
||||||
|
end;
|
||||||
|
lookup_masq_addr(rev, GtDigits) ->
|
||||||
|
case ets:lookup(get(sccp_masq_rev), GtDigits) of
|
||||||
|
[#sccp_masq_rec{digits_out = DigitsOut}] ->
|
||||||
|
DigitsOut;
|
||||||
|
_ ->
|
||||||
|
% we do not allocate entries in the reverse direction
|
||||||
|
undef
|
||||||
|
end.
|
||||||
|
|
||||||
|
|
||||||
|
% Masquerade the CALLING address in first STP(G-MSC) -> HLR/VLR/MSC dir
|
||||||
|
mangle_rx_calling(from_stp, Addr = #sccp_addr{global_title = GT}) ->
|
||||||
|
GtOrig = GT#global_title.phone_number,
|
||||||
|
GtReplace = lookup_masq_addr(orig, GtOrig),
|
||||||
|
case GtReplace of
|
||||||
|
undef ->
|
||||||
|
io:format("SCCP MASQ: Unable to rewrite in original direction (out of GT addrs?)~n"),
|
||||||
|
Addr;
|
||||||
|
_ ->
|
||||||
|
io:format("SCCP MASQ (STP->MSC) rewrite ~p->~p~n", [GtOrig, GtReplace]),
|
||||||
|
GTout = GT#global_title{phone_number = GtReplace},
|
||||||
|
Addr#sccp_addr{global_title = GTout}
|
||||||
|
end;
|
||||||
|
mangle_rx_calling(_From, Addr) ->
|
||||||
|
Addr.
|
||||||
|
|
||||||
|
mangle_rx_called(from_msc, Addr = #sccp_addr{global_title = GT}) ->
|
||||||
|
GtOrig = GT#global_title.phone_number,
|
||||||
|
GtReplace = lookup_masq_addr(rev, GtOrig),
|
||||||
|
case GtReplace of
|
||||||
|
undef ->
|
||||||
|
io:format("SCCP MASQ: Unable to rewrite in original direction (unknown GT ~p)~n", [GT]),
|
||||||
|
Addr;
|
||||||
|
_ ->
|
||||||
|
io:format("SCCP MASQ (MSC->STP) rewrite ~p->~p~n", [GtOrig, GtReplace]),
|
||||||
|
GTout = GT#global_title{phone_number = GtReplace},
|
||||||
|
Addr#sccp_addr{global_title = GTout}
|
||||||
|
end;
|
||||||
|
mangle_rx_called(_From, Addr) ->
|
||||||
|
Addr.
|
||||||
|
|
||||||
|
|
||||||
|
sccp_masq_msg(From, ?SCCP_MSGT_UDT, Msg = #sccp_msg{parameters = Opts}) ->
|
||||||
|
CalledParty = proplists:get_value(called_party_addr, Opts),
|
||||||
|
CalledPartyNew = mangle_rx_called(From, CalledParty),
|
||||||
|
CallingParty = proplists:get_value(calling_party_addr, Opts),
|
||||||
|
CallingPartyNew = mangle_rx_calling(From, CallingParty),
|
||||||
|
Opts1 = lists:keyreplace(called_party_addr, 1, Opts,
|
||||||
|
{called_party_addr, CalledPartyNew}),
|
||||||
|
Opts2 = lists:keyreplace(calling_party_addr, 1, Opts1,
|
||||||
|
{calling_party_addr, CallingPartyNew}),
|
||||||
|
Msg#sccp_msg{parameters = Opts2};
|
||||||
|
sccp_masq_msg(_From, _MsgType, Msg) ->
|
||||||
|
Msg.
|
||||||
|
|
||||||
|
init() ->
|
||||||
|
Orig = ets:new(sccp_masq_orig, [ordered_set,
|
||||||
|
{keypos, #sccp_masq_rec.digits_in}]),
|
||||||
|
Rev = ets:new(sccp_masq_rev, [ordered_set,
|
||||||
|
{keypos, #sccp_masq_rec.digits_in}]),
|
||||||
|
put(sccp_masq_orig, Orig),
|
||||||
|
put(sccp_masq_rev, Rev),
|
||||||
|
ok.
|
||||||
|
|
||||||
|
reset() ->
|
||||||
|
io:format("SCCP MASQ: Deleting all MASQ state records~n"),
|
||||||
|
ets:delete_all_objects(get(sccp_masq_orig)),
|
||||||
|
ets:delete_all_objects(get(sccp_masq_rev)).
|
Loading…
Reference in New Issue