239 lines
7.1 KiB
C
239 lines
7.1 KiB
C
/* packet-diameter_3gpp.c
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* Routines for dissecting 3GPP OctetSting AVP:s
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* Copyright 2008, 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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/* This dissector registers a dissector table for 3GPP Vendor specific
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* AVP:s which will be called from the Diameter dissector to dissect
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* the content of AVP:s of the OctetString type(or similar).
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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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#include <epan/asn1.h>
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#include "packet-gsm_map.h"
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#include "packet-gsm_a_common.h"
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#include "packet-e212.h"
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/* Initialize the protocol and registered fields */
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static int proto_diameter_3gpp = -1;
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static int hf_diameter_3gpp_msisdn = -1;
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static int hf_diameter_3gpp_user_data = -1;
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static int hf_diameter_3gpp_ipaddr = -1;
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static int hf_diameter_3gpp_mbms_required_qos_prio = -1;
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static int hf_diameter_3gpp_tmgi = -1;
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static int hf_diameter_mbms_service_id = -1;
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static gint diameter_3gpp_msisdn_ett = -1;
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static gint diameter_3gpp_tmgi_ett = -1;
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/* Used for Diameter */
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/* dissector handles */
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static dissector_handle_t xml_handle;
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/* AVP Code: 701 MSISDN */
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static int
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dissect_diameter_3gpp_msisdn(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
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proto_item* item;
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proto_tree *sub_tree;
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int offset = 0;
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item = proto_tree_add_item(tree, hf_diameter_3gpp_msisdn, tvb, offset, 6, FALSE);
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sub_tree = proto_item_add_subtree(item,diameter_3gpp_msisdn_ett);
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dissect_gsm_map_msisdn(tvb, pinfo, sub_tree);
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return tvb_length(tvb);
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}
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/* AVP Code: 702 User-Data */
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static int
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dissect_diameter_3gpp_user_data(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
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guint8 word[6];
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int length = tvb_length(tvb);
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/* If there is less than 38 characters this is not XML
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* <?xml version="1.0" encoding="UTF-8"?>
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*/
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if(length < 38)
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return length;
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tvb_get_nstringz0(tvb, 0, sizeof(word),word);
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if (g_ascii_strncasecmp(word, "<?xml", 5) == 0){
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call_dissector(xml_handle, tvb, pinfo, tree);
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}
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return length;
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}
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/* AVP Code: 900 TMGI */
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static int
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dissect_diameter_3gpp_tmgi(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
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proto_item* item;
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proto_tree *sub_tree;
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int offset = 0;
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item = proto_tree_add_item(tree, hf_diameter_3gpp_tmgi, tvb, offset, 6, FALSE);
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sub_tree = proto_item_add_subtree(item,diameter_3gpp_tmgi_ett);
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/* MBMS Service ID consisting of three octets. MBMS Service ID consists of a 6-digit
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* fixed-length hexadecimal number between 000000 and FFFFFF.
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* MBMS Service ID uniquely identifies an MBMS bearer service within a PLMN.
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*/
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proto_tree_add_item(sub_tree, hf_diameter_mbms_service_id, tvb, offset, 3, FALSE);
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offset = offset+3;
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offset = dissect_e212_mcc_mnc(tvb, pinfo, sub_tree, offset, TRUE);
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return offset;
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}
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/* AVP Code: 918 MBMS-BMSC-SSM-IP-Address */
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static int
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dissect_diameter_3gpp_ipaddr(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
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int offset = 0;
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proto_tree_add_item(tree, hf_diameter_3gpp_ipaddr, tvb, offset, 4, FALSE);
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offset += 4;
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return offset;
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}
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/* AVP Code: 913 MBMS-Required-QoS */
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static int
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dissect_diameter_3gpp_mbms_required_qos(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
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int offset = 0;
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guint length;
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/* Octet
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* 1 Allocation/Retention Priority as specified in 3GPP TS 23.107.
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* This octet encodes each priority level defined in 3GPP TS 23.107
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* as the binary value of the priority level. It specifies the relative
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* importance of the actual MBMS bearer service compared to other MBMS
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* and non-MBMS bearer services for allocation and retention of the
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* MBMS bearer service.
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* 2-N QoS Profile as specified by the Quality-of-Service information element,
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* from octet 3 onwards, in 3GPP TS 24.008
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*/
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proto_tree_add_item(tree, hf_diameter_3gpp_mbms_required_qos_prio, tvb, offset, 1, FALSE);
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offset++;
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length = tvb_length(tvb) - 1;
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de_sm_qos(tvb, tree, offset, length, NULL, 0);
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return offset+length;
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}
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void
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proto_reg_handoff_diameter_3gpp(void)
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{
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/* AVP Code: 701 MSISDN */
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dissector_add("diameter.3gpp", 701, new_create_dissector_handle(dissect_diameter_3gpp_msisdn, proto_diameter_3gpp));
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/* AVP Code: 702 User-Data */
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dissector_add("diameter.3gpp", 702, new_create_dissector_handle(dissect_diameter_3gpp_user_data, proto_diameter_3gpp));
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/* AVP Code: 900 TMGI */
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dissector_add("diameter.3gpp", 900, new_create_dissector_handle(dissect_diameter_3gpp_tmgi, proto_diameter_3gpp));
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/* AVP Code: 918 MBMS-BMSC-SSM-IP-Address */
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dissector_add("diameter.3gpp", 918, new_create_dissector_handle(dissect_diameter_3gpp_ipaddr, proto_diameter_3gpp));
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/* AVP Code: 913 MBMS-Required-QoS */
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dissector_add("diameter.3gpp", 913, new_create_dissector_handle(dissect_diameter_3gpp_mbms_required_qos, proto_diameter_3gpp));
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xml_handle = find_dissector("xml");
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}
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void
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proto_register_diameter_3gpp(void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_diameter_3gpp_msisdn,
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{ "MSISDN", "diameter.3gpp.msisdn",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_diameter_3gpp_user_data,
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{ "User data", "diameter.3gpp.user_data",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_diameter_3gpp_ipaddr,
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{ "IPv4 Address", "diameter.3gpp.ipaddr",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_diameter_3gpp_mbms_required_qos_prio,
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{ "Allocation/Retention Priority", "diameter.3gpp.mbms_required_qos_prio",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_diameter_3gpp_tmgi,
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{ "TMGI", "diameter.3gpp.tmgi",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_diameter_mbms_service_id,
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{ "MBMS Service ID", "diameter.3gpp.mbms_service_id",
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FT_UINT24, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&diameter_3gpp_msisdn_ett,
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&diameter_3gpp_tmgi_ett,
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};
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/* Required function calls to register the header fields and subtrees used */
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proto_diameter_3gpp = proto_register_protocol("Diameter 3GPP","Diameter3GPP", "diameter3gpp");
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proto_register_field_array(proto_diameter_3gpp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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