2007-08-17 21:31:22 +00:00
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/* packet-dpnss_dass2.c
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* Routines for DPNNS/DASS2 dissection
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* Copyright 2007, Anders Broman <anders.broman[at]ericsson.com>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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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
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* as published by the Free Software Foundation; either version 2
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* of the 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 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 02111-1307, USA.
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*
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* References:
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* ND1301:2001/03 http://www.nicc.org.uk/nicc-public/Public/interconnectstandards/dpnss/nd1301_2004_11.pdf
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/proto.h>
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/* Initialize the protocol and registered fields */
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static int proto_dpnss = -1;
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static int hf_dpnss_msg_grp_id = -1;
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static int hf_dpnss_cc_msg_type = -1;
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static int hf_dpnss_e2e_msg_type = -1;
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static int hf_dpnss_LbL_msg_type = -1;
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static int hf_dpnss_ext_bit = -1;
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static int hf_dpnss_sic_type = -1;
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static int hf_dpnss_sic_details_for_speech = -1;
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static int hf_dpnss_sic_details_for_data1 = -1;
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static int hf_dpnss_sic_details_for_data2 = -1;
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#define DPNNS_MESSAGE_GROUP_CC 0
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#define DPNNS_MESSAGE_GROUP_E2E 2
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#define DPNNS_MESSAGE_GROUP_LbL 4
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#define DPNSS_CC_MDG_ISRMC 0
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/* Initialize the subtree pointers */
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static int ett_dpnss = -1;
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static const value_string dpnss_msg_grp_id_vals[] = {
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{0, "Call Control Message Group"},
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{2, "End-to-End Message Group"},
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{4, "Link-by-Link Message Group"},
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{0, NULL }
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};
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static const value_string dpnss_cc_msg_type_vals[] = {
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{0, "INITIAL SERVICE REQUEST Message (COMPLETE) - ISRM (C)"},
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{1, "INITIAL SERVICE REQUEST Message (INCOMPLETE) - ISRM(I)"},
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{2, "RECALL Message (COMPLETE) - RM(C)"},
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{3, "RECALL Message (INCOMPLETE) - RM(I)"},
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{5, "CALL CONNECTED Message - CCM"},
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{6, "NETWORK INDICATION Message - NIM"},
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{8, "CLEAR REQUEST Message - CRM/CLEAR INDICATION Message - CIM"}, /* Humm chek 2.1.7/2.1.8 - depends on dir? */
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{9, "NUMBER ACKNOWLEDGE Message - NAM"},
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{10, "RECALL REJECTION Message - RRM"},
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{11, "SUBSEQUENT SERVICE REQUEST Message (INCOMPLETE) - SSRM(I)"},
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{12, "SUBSEQUENT SERVICE REQUEST Message (COMPLETE) - SSRM(C)"},
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{ 0, NULL }
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};
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static const value_string dpnss_cc_msg_short_type_vals[] = {
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{0, "ISRM (C)"},
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{1, "ISRM(I)"},
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{2, "RM(C)"},
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{3, "RM(I)"},
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{5, "CCM"},
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{6, "NIM"},
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{8, "CRM/CIM"}, /* Humm chek 2.1.7/2.1.8 - depends on dir? */
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{9, "NAM"},
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{10, "RRM"},
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{11, "SSRM(I)"},
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{12, "SSRM(C)"},
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{0, NULL }
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};
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/* 2.2 END-TO-END MESSAGE GROUP */
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static const value_string dpnss_e2e_msg_type_vals[] = {
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{2, "END-to-END Message (COMPLETE) - EEM(C)"},
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{3, "END-to-END Message (INCOMPLETE) - EEM(I)"},
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{4, "SINGLE-CHANNEL CLEAR REQUEST Message - SCRM"},
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{5, "SINGLE-CHANNEL CLEAR INDICATION Message - SCIM"},
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{6, "END-to-END RECALL Message (COMPLETE) - ERM(C)"},
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{7, "END-to-END RECALL Message (INCOMPLETE) - ERM(I)"},
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{8, "NON SPECIFIED INFORMATION Message - NSIM"},
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{ 0, NULL }
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};
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static const value_string dpnss_e2e_msg_short_type_vals[] = {
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{2, "EEM(C)"},
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{3, "EEM(I)"},
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{4, "SCRM"},
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{5, "SCIM"},
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{6, "ERM(C)"},
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{7, "ERM(I)"},
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{8, "NSIM"},
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{ 0, NULL }
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};
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/* 2.3 LINK-BY-LINK MESSAGE GROUP */
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static const value_string dpnss_LbL_msg_type_vals[] = {
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{0, "LINK-by-LINK Message (COMPLETE) - LLM(C)"},
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{1, "LINK-by-LINK Message (INCOMPLETE) - LLM(I)"},
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{2, "LINK-by-LINK REJECT Message - LLRM"},
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{4, "SWAP Message - SM"},
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{5, "LINK MAINTENANCE Message - LMM"},
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{6, "LINK MAINTENANCE REJECT Message - LMRM"},
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{ 0, NULL }
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};
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static const value_string dpnss_LbL_msg_short_type_vals[] = {
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{0, "LLM(C)"},
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{1, "LLM(I)"},
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{2, "LLRM"},
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{4, "SM"},
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{5, "LMM"},
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{6, "LMRM"},
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{ 0, NULL }
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};
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static const true_false_string dpnss_ext_bit_vals = {
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"further octet(s) follow",
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"no further octets"
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};
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/* SECTION 4 ANNEX 1 */
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static const value_string dpnss_sic_type_type_vals[] = {
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{0, "invalid"},
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{1, "speech"},
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{2, "data"},
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{3, "data"},
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{4, "interworking with DASS 2 - treat as data"},
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{5, "interworking with DASS 2 - treat as data"},
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{6, "interworking with DASS 2 - treat as data"},
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{7, "interworking with DASS 2 - treat as data"},
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{ 0, NULL }
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};
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static const value_string dpnss_sic_sic_details_for_speech_vals[] = {
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{0, "64 kbit/s PCM G.711 A-Law or analogue"},
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{1, "32 kbit/s ADPCM G.721"},
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{2, "64 kbit/s PCM G.711 u-Law or analogue"},
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{3, "Invalid"},
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{4, "Invalid"},
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{5, "Invalid"},
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{6, "Invalid"},
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{7, "Invalid"},
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{8, "Invalid"},
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{9, "Invalid"},
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{10, "Invalid"},
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{11, "Invalid"},
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{12, "Invalid"},
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{13, "Invalid"},
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{14, "Invalid"},
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{15, "Invalid"},
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{ 0, NULL }
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};
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static const value_string dpnss_sic_sic_details_for_data_rates1_vals[] = {
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{0, "64000 bit/s"},
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{1, "56000 bit/s"},
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{2, "48000 bit/s"},
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{3, "32000 bit/s"},
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{4, "19200 bit/s"},
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{5, "16000 bit/s"},
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{6, "14400 bit/s"},
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{7, "12000 bit/s"},
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{8, "9600 bit/s"},
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{9, "8000 bit/s"},
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{10, "7200 bit/s"},
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{11, "4800 bit/s"},
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{12, "3600 bit/s"},
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{13, "2400 bit/s"},
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{14, "1200 bit/s"},
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{15, "600 bit/s"},
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{ 0, NULL }
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};
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static const value_string dpnss_sic_sic_details_for_data_rates2_vals[] = {
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{0, "300 bit/s"},
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{1, "200 bit/s"},
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{2, "150 bit/s"},
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{3, "134.5 bit/s"},
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{4, "110 bit/s"},
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{5, "100 bit/s"},
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{6, "75 bit/s"},
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{7, "50 bit/s"},
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{8, "75/1200 bit/s"},
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{9, "1200/75 bit/s"},
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{10, "invalid"},
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{11, "invalid"},
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{12, "invalid"},
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{13, "invalid"},
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{14, "invalid"},
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{15, "invalid"},
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{ 0, NULL }
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};
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/* A suplemetarry string
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*
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*/
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static int
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2007-08-18 03:19:44 +00:00
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dissect_dpnss_sup_info_str(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree _U_, gint offset)
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2007-08-17 21:31:22 +00:00
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{
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guint hash_offset;
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hash_offset = tvb_find_guint8(tvb, offset, -1, '#');
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return offset;
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}
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static int
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dissect_dpnss_LbL_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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int offset = 0;
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guint8 octet;
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proto_tree_add_item(tree, hf_dpnss_LbL_msg_type, tvb, offset, 1, FALSE);
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octet = tvb_get_guint8(tvb,offset)&0x0f;
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offset++;
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if(check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
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val_to_str(octet, dpnss_LbL_msg_short_type_vals, "Unknown (%d)" ));
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switch (octet){
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default:
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proto_tree_add_text(tree, tvb, offset, 1, "Dissection of this message not supported yet");
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break;
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}
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return offset;
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}
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static int
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dissect_dpnss_e2e_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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int offset = 0;
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guint8 octet;
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proto_tree_add_item(tree, hf_dpnss_e2e_msg_type, tvb, offset, 1, FALSE);
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octet = tvb_get_guint8(tvb,offset)&0x0f;
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offset++;
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if(check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
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val_to_str(octet, dpnss_e2e_msg_short_type_vals, "Unknown (%d)" ));
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switch (octet){
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default:
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proto_tree_add_text(tree, tvb, offset, 1, "Dissection of this message not supported yet");
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break;
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}
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return offset;
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}
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static int
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dissect_dpnss_cc_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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int offset = 0;
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guint8 octet;
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guint8 type_of_data;
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proto_tree_add_item(tree, hf_dpnss_cc_msg_type, tvb, offset, 1, FALSE);
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octet = tvb_get_guint8(tvb,offset)&0x0f;
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offset++;
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if(check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
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val_to_str(octet, dpnss_cc_msg_short_type_vals, "Unknown (%d)" ));
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switch (octet){
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case DPNSS_CC_MDG_ISRMC:
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/* 2.1.1 INITIAL SERVICE REQUEST Message (COMPLETE) - ISRM (C) */
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/* Service Indicator Code
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* Note: On data calls the SIC may comprise more than one octet.
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* The Service Indicator Code is coded in accordance with ANNEX 1.
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*/
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/* Routing Information */
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octet = tvb_get_guint8(tvb,offset);
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type_of_data = (octet & 0x70)>>4;
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proto_tree_add_item(tree, hf_dpnss_ext_bit, tvb, offset, 1, FALSE);
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proto_tree_add_item(tree, hf_dpnss_sic_type, tvb, offset, 1, FALSE);
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switch(type_of_data){
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case 1:
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/* Type of Data (001) : Details for Speech */
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proto_tree_add_item(tree, hf_dpnss_sic_details_for_speech, tvb, offset, 1, FALSE);
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break;
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case 2:
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/* Type of Data (010) : Data Rates */
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proto_tree_add_item(tree, hf_dpnss_sic_details_for_data1, tvb, offset, 1, FALSE);
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break;
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case 3:
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/* Type of Data (011) : Data Rates */
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proto_tree_add_item(tree, hf_dpnss_sic_details_for_data2, tvb, offset, 1, FALSE);
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break;
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default:
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/* Illegal */
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break;
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}
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offset++;
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2007-08-18 03:19:44 +00:00
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if((octet&0x80)==0x80){
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2007-08-17 21:31:22 +00:00
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/* Extension bit set
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* Synch/Asynchronous Information
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*/
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/* TODO add decoding here */
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offset++;
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}
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/*
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* Selection Field
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* 2 + n structured as shown in Subsection 3.
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*/
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proto_tree_add_text(tree, tvb, offset, -1, "Selection Field: %s",tvb_format_text(tvb,offset,tvb_length_remaining(tvb, offset)));
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offset = dissect_dpnss_sup_info_str(tvb, pinfo, tree, offset);
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break;
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default:
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|
proto_tree_add_text(tree, tvb, offset, 1, "Dissection of this message not supported yet");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return offset;
|
|
|
|
|
|
|
|
}
|
|
|
|
/* Code to actually dissect the packets */
|
|
|
|
static void
|
|
|
|
dissect_dpnss(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
|
|
{
|
|
|
|
int offset = 0;
|
|
|
|
proto_item *item;
|
|
|
|
proto_tree *dpnss_tree;
|
|
|
|
guint8 octet;
|
|
|
|
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DPNSS/DASS2");
|
|
|
|
|
|
|
|
if (tree) {
|
|
|
|
item = proto_tree_add_item(tree, proto_dpnss, tvb, 0, -1, FALSE);
|
|
|
|
dpnss_tree = proto_item_add_subtree(item, ett_dpnss);
|
|
|
|
proto_tree_add_item(dpnss_tree, hf_dpnss_msg_grp_id, tvb, offset, 1, FALSE);
|
|
|
|
octet = tvb_get_guint8(tvb,offset)>>4;
|
|
|
|
switch (octet){
|
|
|
|
case DPNNS_MESSAGE_GROUP_CC:
|
|
|
|
/* Call Control Message Group */
|
|
|
|
offset = dissect_dpnss_cc_msg(tvb, pinfo, dpnss_tree);
|
|
|
|
break;
|
|
|
|
case DPNNS_MESSAGE_GROUP_E2E:
|
|
|
|
/* End-to-End Message Group */
|
|
|
|
offset = dissect_dpnss_e2e_msg(tvb, pinfo, dpnss_tree);
|
|
|
|
break;
|
|
|
|
case DPNNS_MESSAGE_GROUP_LbL:
|
|
|
|
/* Link-by-Link Message Group */
|
|
|
|
offset = dissect_dpnss_LbL_msg(tvb, pinfo, dpnss_tree);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 1, "Unknown Message Group");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Register the protocol with Wireshark */
|
|
|
|
/* If this dissector uses sub-dissector registration add a registration routine.
|
|
|
|
This format is required because a script is used to find these routines and
|
|
|
|
create the code that calls these routines.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
proto_reg_handoff_dpnss(void)
|
|
|
|
{
|
|
|
|
dissector_handle_t dpnss_handle;
|
2007-08-18 03:19:44 +00:00
|
|
|
/** static int dpnss_prefs_initialized = FALSE; **/
|
2007-08-17 21:31:22 +00:00
|
|
|
|
|
|
|
dpnss_handle = create_dissector_handle(dissect_dpnss, proto_dpnss);
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_dpnss(void)
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_dpnss_msg_grp_id,
|
|
|
|
{ "Message Group Identifier", "dpnss.msg_grp_id",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_msg_grp_id_vals), 0xf0,
|
|
|
|
"Message Group Identifier", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_cc_msg_type,
|
|
|
|
{ "Call Control Message Type", "dpnss.cc_msg_type",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_cc_msg_type_vals), 0x0f,
|
|
|
|
"Call Control Message Type", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_e2e_msg_type,
|
|
|
|
{ "END-TO-END Message Type", "dpnss.e2e_msg_type",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_e2e_msg_type_vals), 0x0f,
|
|
|
|
"END-TO-END Message Type", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_LbL_msg_type,
|
|
|
|
{ "LINK-BY-LINK Message Type", "dpnss.lbl_msg_type",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_LbL_msg_type_vals), 0x0f,
|
|
|
|
"LINK-BY-LINK Message Type", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_ext_bit,
|
|
|
|
{ "Extension bit", "dpnss.ext_bit",
|
|
|
|
FT_BOOLEAN, 8, TFS(&dpnss_ext_bit_vals), 0x80,
|
|
|
|
"Extension bit", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_sic_type,
|
|
|
|
{ "Type of data", "dpnss.sic_type",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_sic_type_type_vals), 0x70,
|
|
|
|
"Type of data", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_sic_details_for_speech,
|
|
|
|
{ "Details for Speech", "dpnss.sic_details_for_speech",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_sic_sic_details_for_speech_vals), 0x0f,
|
|
|
|
"Details for Speech", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_sic_details_for_data1,
|
|
|
|
{ "Data Rates", "dpnss.sic_details_for_data1",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_sic_sic_details_for_data_rates1_vals), 0x0f,
|
|
|
|
"Type of Data (010) : Data Rates", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_dpnss_sic_details_for_data2,
|
|
|
|
{ "Data Rates", "dpnss.sic_details_data2",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(dpnss_sic_sic_details_for_data_rates2_vals), 0x0f,
|
|
|
|
"Type of Data (011) : Data Rates", HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_dpnss,
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_dpnss = proto_register_protocol("Digital Private Signalling System No 1","DPNSS", "dpnss");
|
|
|
|
register_dissector("dpnss", dissect_dpnss, proto_dpnss);
|
|
|
|
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array(proto_dpnss, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
|
2007-08-18 03:19:44 +00:00
|
|
|
}
|