Add some unfinished ISUP decoder routines
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% Table 1 / Q.762 - ISDN user part message acronyms
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-define(ISUP_MSGT_ACM). % Address complete
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-define(ISUP_MSGT_ANM). % Answer
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-define(ISUP_MSGT_APM). % Application transport
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-define(ISUP_MSGT_BLA). % Blocking acknowledgement
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-define(ISUP_MSGT_BLO). % Blocking
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-define(ISUP_MSGT_CCR). % Continuity check request
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-define(ISUP_MSGT_CFN). % Confusion
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-define(ISUP_MSGT_CGB). % Circuit group blocking
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-define(ISUP_MSGT_CGBA).% Circuit group blocking acknowledgement
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-define(ISUP_MSGT_CGU). % Circuit group unblocking
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-define(ISUP_MSGT_CGUA).% Circuit group unblocking acknowledgement
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-define(ISUP_MSGT_CON). % Connect
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-define(ISUP_MSGT_COT). % Continuity
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-define(ISUP_MSGT_CPG). % Call progress
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-define(ISUP_MSGT_CRG). % Charge information
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-define(ISUP_MSGT_CQM). % Circuit group query
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-define(ISUP_MSGT_CQR). % Circuit group query response
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-define(ISUP_MSGT_DRS). % Delayed release (reserved – used in 1988 version)
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-define(ISUP_MSGT_FAA). % Facility accepted
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-define(ISUP_MSGT_FAC). % Facility
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-define(ISUP_MSGT_FAR). % Facility request
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-define(ISUP_MSGT_FOT). % Forward transfer
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-define(ISUP_MSGT_FRJ). % Facility reject
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-define(ISUP_MSGT_GRA). % Circuit group reset acknowledgement
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-define(ISUP_MSGT_GRS). % Circuit group reset
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-define(ISUP_MSGT_IAM). % Initial address
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-define(ISUP_MSGT_IDR). % Identification request
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-define(ISUP_MSGT_IRS). % Identification response
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-define(ISUP_MSGT_INF). % Information
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-define(ISUP_MSGT_INR). % Information request
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-define(ISUP_MSGT_LPA). % Loop back acknowledgement
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-define(ISUP_MSGT_LOP). % Loop prevention
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-define(ISUP_MSGT_NRM). % Network resource management
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-define(ISUP_MSGT_OLM). % Overload
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-define(ISUP_MSGT_PAM). % Pass-along
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-define(ISUP_MSGT_PRI). % Pre-release information
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-define(ISUP_MSGT_REL). % Release
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-define(ISUP_MSGT_RES). % Resume
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-define(ISUP_MSGT_RLC). % Release complete
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-define(ISUP_MSGT_RSC). % Reset circuit
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-define(ISUP_MSGT_SAM). % Subsequent address
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-define(ISUP_MSGT_SDM). % Subsequent directory number
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-define(ISUP_MSGT_SGM). % Segmentation
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-define(ISUP_MSGT_SUS). % Suspend
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-define(ISUP_MSGT_UBL). % Unblocking
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-define(ISUP_MSGT_UBA). % Unblocking acknowledgement
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-define(ISUP_MSGT_UCIC).% Unequipped circuit identification code
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-define(ISUP_MSGT_UPA). % User part available
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-define(ISUP_MSGT_UPT). % User part test
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-define(ISUP_MSGT_USR). % User-to-user information
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@ -0,0 +1,118 @@
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% ITU-T Q.76x ISUPcoding / decoding
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% (C) 2011 by Harald Welte <laforge@gnumonks.org>
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%
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% All Rights Reserved
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%
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% This program is free software; you can redistribute it and/or modify
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% it under the terms of the GNU Affero General Public License as
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% published by the Free Software Foundation; either version 3 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
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU Affero General Public License
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% along with this program. If not, see <http://www.gnu.org/licenses/>.
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-module(isup_codec).
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-author('Harald Welte <laforge@gnumonks.org>').
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-include("isup.hrl").
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-export([parse_isup_msg/1, encode_isup_msg/1]).
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% References to 'Tabe C-xxx' are to Annex C of Q.767
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% Default case: no fixed and no variable parts, only options
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% ANM, RLC, FOT
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parse_isup_msgt(M, Bin) when
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M == ?ISUP_MSGT_ANM;
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M == ?ISUP_MSGT_RLC;
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M == ?ISUP_MSGT_FOT;
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parse_isup_opts(Bin);
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% Table C-5 Address complete
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parse_isup_msgt(?ISUP_MSGT_ACM, Bin) ->
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<<BackCallInd:16, Remain/binary>> = Bin,
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BciOpt = {backward_call_ind, BackCallInd},
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Opts = parse_isup_opts(Remain)
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[BciOpt|Opts];
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% Table C-7 Call progress
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parse_isup_msgt(?ISUP_MSGT_CPG, Bin) ->
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<<EventInf:8, Remain/binary>> = Bin,
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BciOpt = {event_info, EventInf},
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Opts = parse_isup_opts(Remain)
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[BciOpt|Opts];
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% Table C-9 Circuit group reset acknowledgement
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parse_isup_msgt(?ISUP_MSGT_GRA, Bin) ->
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% V: Range and status
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% Table C-11 Connect
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parse_isup_msgt(?ISUP_MSGT_CON, Bin) ->
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<<BackCallInd:16, Remain/binary>> = Bin,
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BciOpt = {backward_call_ind, BackCallInd},
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Opts = parse_isup_opts(Remain)
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[BciOpt|Opts];
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% Table C-12 Continuity
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parse_isup_msgt(?ISUP_MSGT_COT, Bin) ->
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<<ContInd:8>> = Bin,
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[{continuity_ind, ContInd}];
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% Table C-16 Initial address
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parse_isup_msgt(?ISUP_MSGT_IAM, Bin) ->
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<<CINat:8, FwCallInd:16/big, CallingCat:8, TransmReq:8, VarAndOpt/binary>> = Bin,
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FixedOpts = [{conn_ind_nature, CINat}, {fw_call_ind, FwCallInd}, {calling_cat, CallingCat},
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{transm_medium_req, TransmReq}],
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% V: Called Party Number
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VarOpts = FIXME;
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Opts = parse_isup_opts(Remain),
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[FixedOpts,VarOpts,Opts];
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% Table C-17 Release
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parse_isup_msgt(?ISUP_MSGT_REL, Bin) ->
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% V: Cause indicators
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VarOpts = FIXME;
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Opts = parse_isup_opts(Remain),
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[VarOpts,Opts];
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% Table C-19 Subsequent address
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parse_isup_msgt(?ISUP_MSGT_SAM, Bin) ->
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% V: Subsequent number
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VarOpts = FIXME;
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Opts = parse_isup_opts(Remain),
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[VarOpts,Opts];
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% Table C-21 Suspend, Resume
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parse_isup_msgt(Msgt, Bin) when Msgt == ?ISUP_MSGT_RES or Msgt == ?ISUP_MSGT_SUS ->
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<<SuspResInd:8, Remain/binary>> = Bin,
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FixedOpts = [{susp_res_ind, SuspResInd}],
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Opts = parse_isup_opts(Remain),
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[FixedOpts|Opts];
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% Table C-23
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parse_isup_msgt(M, <<>>) when
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M == ?ISUP_MSGT_BLO;
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M == ?ISUP_MSGT_BLA;
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M == ?ISUP_MSGT_CCR;
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M == ?ISUP_MSGT_RSC;
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M == ?ISUP_MSGT_UBL;
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M == ?ISUP_MSGT_UBA ->
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[].
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% Table C-25
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parse_isup_msgt(M, Bin) when
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M == ?ISUP_MSGT_CGB;
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M == ?ISUP_MSGT_CGBA;
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M == ISUP_MSGT_CGU;
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M == ISUP_MSGT_CGUA ->
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<<CGMsgt:8, VarBin/binary>> = Bin,
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FixedOpts = [{cg_supv_msgt, CGMsgt}],
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% V: Range and status
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VarOpts = FIXME,
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[FixedOpts|VarOpts];
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% Table C-26 Circuit group reset
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parse_isup_msgt(?ISUP_MSGT_GRS, Bin) ->
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% V: Range without status
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VarOpts = FIXME,
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VarOpts.
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parse_isup_msg(Databin) when is_binary(DataBin) ->
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<<0:4, Cic:12/big, MsgType:8, Remain/binary>> = DataBin,
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Opts = parse_isup_msgt(MsgType, Remain),
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#isup_msg{cic = Cic, msg_type = MsgType, parameters = Opts}.
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