epan/dissectors/packet-diameter_3gpp.c

   1 /* packet-diameter_3gpp.c
   2  * Routines for dissecting 3GPP OctetSting AVP:s
   3  * Copyright 2008, Anders Broman <anders.broman[at]ericsson.com>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  */
  25
  26  /* This dissector registers a dissector table for 3GPP Vendor specific
  27   * AVP:s which will be called from the Diameter dissector to dissect
  28   * the content of AVP:s of the OctetString type(or similar).
  29   */
  30
  31   #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 #include <glib.h>
  40
  41 #include <epan/packet.h>
  42 #include <epan/proto.h>
  43 #include <epan/asn1.h>
  44
  45 #include "packet-gsm_map.h"
  46 #include "packet-gsm_a_common.h"
  47 #include "packet-e212.h"
  48
  49 /* Initialize the protocol and registered fields */
  50 static int proto_diameter_3gpp                  = -1;
  51
  52 static int hf_diameter_3gpp_msisdn                                      = -1;
  53 static int hf_diameter_3gpp_ipaddr                                      = -1;
  54 static int hf_diameter_3gpp_mbms_required_qos_prio      = -1;
  55 static int hf_diameter_3gpp_tmgi                                        = -1;
  56 static int hf_diameter_mbms_service_id                          = -1;
  57
  58 static gint diameter_3gpp_msisdn_ett                            = -1;
  59 static gint diameter_3gpp_tmgi_ett                                      = -1;
  60 /* Used for Diameter */
  61
  62 static int
  63 dissect_diameter_3gpp_msisdn(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
  64
  65         proto_item* item;
  66         proto_tree *sub_tree;
  67         int offset = 0;
  68
  69         item = proto_tree_add_item(tree, hf_diameter_3gpp_msisdn, tvb, offset, 6, FALSE);
  70         sub_tree = proto_item_add_subtree(item,diameter_3gpp_msisdn_ett);
  71
  72         dissect_gsm_map_msisdn(tvb, pinfo, sub_tree);
  73
  74         return tvb_length(tvb);
  75
  76 }
  77
  78
  79 static int
  80 dissect_diameter_3gpp_tmgi(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
  81
  82         proto_item* item;
  83         proto_tree *sub_tree;
  84         int offset = 0;
  85
  86         item = proto_tree_add_item(tree, hf_diameter_3gpp_tmgi, tvb, offset, 6, FALSE);
  87         sub_tree = proto_item_add_subtree(item,diameter_3gpp_tmgi_ett);
  88
  89         /* MBMS Service ID consisting of three octets. MBMS Service ID consists of a 6-digit
  90          * fixed-length hexadecimal number between 000000 and FFFFFF.
  91          * MBMS Service ID uniquely identifies an MBMS bearer service within a PLMN.
  92          */
  93
  94         proto_tree_add_item(sub_tree, hf_diameter_mbms_service_id, tvb, offset, 3, FALSE);
  95         offset = offset+3;
  96         offset = dissect_e212_mcc_mnc(tvb, pinfo, sub_tree, offset);
  97
  98         return offset;
  99
 100 }
 101
 102 static int
 103 dissect_diameter_3gpp_ipaddr(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
 104
 105         int offset = 0;
 106
 107         proto_tree_add_item(tree, hf_diameter_3gpp_ipaddr, tvb, offset, 4, FALSE);
 108         offset += 4;
 109
 110         return offset;
 111
 112 }
 113
 114 static int
 115 dissect_diameter_3gpp_mbms_required_qos(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
 116
 117         int offset = 0;
 118         guint length;
 119
 120         /* Octet
 121          * 1            Allocation/Retention Priority as specified in 3GPP TS 23.107.
 122          *                      This octet encodes each priority level defined in 3GPP TS 23.107
 123          *                      as the binary value of the priority level. It specifies the relative
 124          *                      importance of the actual MBMS bearer service compared to other MBMS
 125          *                      and non-MBMS bearer services for allocation and retention of the
 126          *                      MBMS bearer service.
 127          * 2-N          QoS Profile as specified by the Quality-of-Service information element,
 128          *                      from octet 3 onwards, in 3GPP TS 24.008
 129          */
 130         proto_tree_add_item(tree, hf_diameter_3gpp_mbms_required_qos_prio, tvb, offset, 1, FALSE);
 131         offset++;
 132         length = tvb_length(tvb) - 1;
 133         de_sm_qos(tvb, tree, offset, length, NULL, 0);
 134         return offset+length;
 135
 136 }
 137
 138 void
 139 proto_reg_handoff_diameter_3gpp(void)
 140 {
 141
 142         /* AVP Code: 701 MSISDN */
 143         dissector_add("diameter.3gpp", 701, new_create_dissector_handle(dissect_diameter_3gpp_msisdn, proto_diameter_3gpp));
 144
 145         /* AVP Code: 900 TMGI */
 146         dissector_add("diameter.3gpp", 900, new_create_dissector_handle(dissect_diameter_3gpp_tmgi, proto_diameter_3gpp));
 147
 148         /* AVP Code: 918 MBMS-BMSC-SSM-IP-Address */
 149         dissector_add("diameter.3gpp", 918, new_create_dissector_handle(dissect_diameter_3gpp_ipaddr, proto_diameter_3gpp));
 150
 151         /* AVP Code: 913 MBMS-Required-QoS */
 152         dissector_add("diameter.3gpp", 913, new_create_dissector_handle(dissect_diameter_3gpp_mbms_required_qos, proto_diameter_3gpp));
 153
 154
 155 }
 156
 157 void
 158 proto_register_diameter_3gpp(void)
 159 {
 160
 161 /* Setup list of header fields  See Section 1.6.1 for details*/
 162         static hf_register_info hf[] = {
 163                 { &hf_diameter_3gpp_msisdn,
 164                         { "MSISDN",           "diameter.3gpp.msisdn",
 165                         FT_BYTES, BASE_NONE, NULL, 0x0,
 166                         NULL, HFILL }
 167                 },
 168                 { &hf_diameter_3gpp_ipaddr,
 169                         { "IPv4 Address",           "diameter.3gpp.ipaddr",
 170                         FT_IPv4, BASE_NONE, NULL, 0x0,
 171                         NULL, HFILL }
 172                 },
 173                 { &hf_diameter_3gpp_mbms_required_qos_prio,
 174                         { "Allocation/Retention Priority",           "diameter.3gpp.mbms_required_qos_prio",
 175                         FT_UINT8, BASE_DEC, NULL, 0x0,
 176                         NULL, HFILL }
 177                 },
 178                 { &hf_diameter_3gpp_tmgi,
 179                         { "TMGI",           "diameter.3gpp.tmgi",
 180                         FT_BYTES, BASE_NONE, NULL, 0x0,
 181                         NULL, HFILL }
 182                 },
 183                 { &hf_diameter_mbms_service_id,
 184                         { "MBMS Service ID",           "diameter.3gpp.mbms_service_id",
 185                         FT_UINT24, BASE_HEX, NULL, 0x0,
 186                         NULL, HFILL }
 187                 },
 188         };
 189
 190         /* Setup protocol subtree array */
 191         static gint *ett[] = {
 192                 &diameter_3gpp_msisdn_ett,
 193                 &diameter_3gpp_tmgi_ett,
 194         };
 195
 196         /* Required function calls to register the header fields and subtrees used */
 197         proto_diameter_3gpp = proto_register_protocol("Diameter 3GPP","Diameter3GPP", "diameter3gpp");
 198         proto_register_field_array(proto_diameter_3gpp, hf, array_length(hf));
 199         proto_register_subtree_array(ett, array_length(ett));
 200 }