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wireshark/epan/dissectors/packet-bssap.c
Michael Mann 1e60d63c8c Create call_data_dissector() to call data dissector. 
This saves many dissectors the need to find the data dissector and store a handle to it.

There were also some that were finding it, but not using it.
For others this was the only reason for their handoff function, so it could be eliminated.

Change-Id: I5d3f951ee1daa3d30c060d21bd12bbc881a8027b
Reviewed-on: https://code.wireshark.org/review/14530
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Michael Mann <mmann78@netscape.net>
2016-03-20 17:38:03 +00:00

2590 lines
104 KiB
C
Raw Blame History

/* packet-bssap.c
* Routines for Base Station Subsystem Application Part (BSSAP/BSAP) dissection
* Specifications from 3GPP2 (www.3gpp2.org) and 3GPP (www.3gpp.org)
* IOS 4.0.1 (BSAP)
* GSM 08.06 (BSSAP)
*
* Copyright 2003, Michael Lum <mlum [AT] telostech.com>
* In association with Telos Technology Inc.
*
* Added BSSAP+ according to ETSI TS 129 018 V6.3.0 (2005-3GPP TS 29.018 version 6.3.0 Release 6)
* Copyright 2006, Anders Broman <Anders.Broman [AT] ericsson.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/prefs.h>
#include <wsutil/str_util.h>
#include "packet-bssap.h"
#include "packet-gsm_a_common.h"
#include "packet-e212.h"
void proto_register_bssap(void);
void proto_reg_handoff_bssap(void);
#define BSSAP 0
#define BSAP 1
#define GSM_INTERFACE 0
#define LB_INTERFACE 1
#define BSSAP_OR_BSAP_DEFAULT BSSAP
#define GSM_OR_LB_INTERFACE_DEFAULT GSM_INTERFACE
#define PDU_TYPE_OFFSET 0
#define PDU_TYPE_LENGTH 1
/* Same as below but with names typed out */
static const value_string bssap_pdu_type_values[] = {
{ BSSAP_PDU_TYPE_BSSMAP, "BSS Management" },
{ BSSAP_PDU_TYPE_DTAP, "Direct Transfer" },
{ 0, NULL } };
static const value_string bsap_pdu_type_values[] = {
{ BSSAP_PDU_TYPE_BSSMAP, "BS Management" },
{ BSSAP_PDU_TYPE_DTAP, "Direct Transfer" },
{ 0, NULL } };
/* Same as above but in acronym for (for the Info column) */
static const value_string bssap_pdu_type_acro_values[] = {
{ BSSAP_PDU_TYPE_BSSMAP, "BSSMAP" },
{ BSSAP_PDU_TYPE_DTAP, "DTAP" },
{ 0, NULL } };
/* Same as above but in acronym for (for the Info column) */
static const value_string bsap_pdu_type_acro_values[] = {
{ BSSAP_PDU_TYPE_BSSMAP, "BSMAP" },
{ BSSAP_PDU_TYPE_DTAP, "DTAP" },
{ 0, NULL } };
#define PARAMETER_DLCI 0x00
#define PARAMETER_LENGTH 0x01
#define PARAMETER_DATA 0x02
#define DLCI_LENGTH 1
#define LENGTH_LENGTH 1
#define DATA_LENGTH 1
#define CC_MASK 0xc0
#define SPARE_MASK 0x38
#define SAPI_MASK 0x07
static guint global_bssap_ssn = 98;
static const value_string bssap_cc_values[] = {
{ 0x00, "not further specified" },
{ 0x80, "FACCH or SDCCH" },
{ 0xc0, "SACCH" },
{ 0, NULL } };
static const value_string bsap_cc_values[] = {
{ 0x00, "default for TIA/EIA/IS-2000" },
{ 0, NULL } };
static const value_string bssap_sapi_values[] = {
{ 0x00, "RR/MM/CC" },
{ 0x03, "SMS" },
{ 0, NULL } };
static const value_string bsap_sapi_values[] = {
{ 0x00, "Not used" },
{ 0, NULL } };
#define BSSAP_PAGING_REQUEST 1
#define BSSAP_PAGING_REJECT 2 /* 17.1.18 */
#define BSSAP_DOWNLINK_TUNNEL_REQUEST 7 /* 17.1.4 */
#define BSSAP_UPLINK_TUNNEL_REQUEST 8 /* 17.1.23 */
#define BSSAP_LOCATION_UPDATE_REQUEST 9 /* 17.1.11 */
#define BSSAP_LOCATION_UPDATE_ACCEPT 10 /* 17.1.9 */
#define BSSAP_LOCATION_UPDATE_REJECT 11 /* 17.1.10 */
#define BSSAP_TMSI_REALLOCATION_COMPLETE 12 /* 17.1.22 */
#define BSSAP_ALERT_REQUEST 13 /* 17.1.3 */
#define BSSAP_ALERT_ACK 14 /* 17.1.1 */
#define BSSAP_ALERT_REJECT 15 /* 17.1.2 */
#define BSSAP_MS_ACTIVITY_INDICATION 16 /* 17.1.14 */
#define BSSAP_GPRS_DETACH_INDICATION 17 /* 17.1.6 */
#define BSSAP_GPRS_DETACH_ACK 18 /* 17.1.5 */
#define BSSAP_IMSI_DETACH_INDICATION 19 /* 17.1.8 */
#define BSSAP_IMSI_DETACH_ACK 20 /* 17.1.7 */
#define BSSAP_RESET_INDICATION 21 /* 17.1.21 */
#define BSSAP_RESET_ACK 22 /* 17.1.20 */
#define BSSAP_MS_INFORMATION_REQUEST 23 /* 17.1.15 */
#define BSSAP_MS_INFORMATION_RESPONSE 24 /* 17.1.16 */
#define BSSAP_MM_INFORMATION_REQUEST 26 /* 17.1.12 */
#define BSSAP_MOBILE_STATUS 29 /* 17.1.13 */
#define BSSAP_MS_UNREACHABLE 31 /* 17.1.17 */
static const value_string bssap_plus_message_type_values[] = {
/* 0 */ { 0x00, "Unassigned: treated as an unknown Message type." },
/* 1 */ { BSSAP_PAGING_REQUEST, "BSSAP+-PAGING-REQUEST" }, /* 17.1.19 */
/* 2 */ { BSSAP_PAGING_REJECT, "BSSAP+-PAGING-REJECT" }, /* 17.1.18 */
/* 3 */ { 0x03, "Unassigned: treated as an unknown Message type." },
/* 4 */ { 0x04, "Unassigned: treated as an unknown Message type." },
/* 5 */ { 0x05, "Unassigned: treated as an unknown Message type." },
/* 6 */ { 0x06, "Unassigned: treated as an unknown Message type." },
/* 7 */ { BSSAP_DOWNLINK_TUNNEL_REQUEST, "BSSAP+-DOWNLINK-TUNNEL-REQUEST" }, /* 17.1.4 */
/* 8 */ { BSSAP_UPLINK_TUNNEL_REQUEST, "BSSAP+-UPLINK-TUNNEL-REQUEST" }, /* 17.1.23 */
/* 9 */ { BSSAP_LOCATION_UPDATE_REQUEST, "BSSAP+-LOCATION-UPDATE-REQUEST" }, /* 17.1.11 */
/* 10 */ { BSSAP_LOCATION_UPDATE_ACCEPT, "BSSAP+-LOCATION-UPDATE-ACCEPT" }, /* 17.1.9 */
/* 11 */ { BSSAP_LOCATION_UPDATE_REJECT, "BSSAP+-LOCATION-UPDATE-REJECT" }, /* 17.1.10 */
/* 12 */ { BSSAP_TMSI_REALLOCATION_COMPLETE, "BSSAP+-TMSI-REALLOCATION-COMPLETE" }, /* 17.1.22 */
/* 13 */ { BSSAP_ALERT_REQUEST, "BSSAP+-ALERT-REQUEST" }, /* 17.1.3 */
/* 14 */ { BSSAP_ALERT_ACK, "BSSAP+-ALERT-ACK" }, /* 17.1.1 */
/* 15 */ { BSSAP_ALERT_REJECT, "BSSAP+-ALERT-REJECT" }, /* 17.1.2 */
/* 16 */ { BSSAP_MS_ACTIVITY_INDICATION, "BSSAP+-MS-ACTIVITY-INDICATION" }, /* 17.1.14 */
/* 17 */ { BSSAP_GPRS_DETACH_INDICATION, "BSSAP+-GPRS-DETACH-INDICATION" }, /* 17.1.6 */
/* 18 */ { BSSAP_GPRS_DETACH_ACK, "BSSAP+-GPRS-DETACH-ACK" }, /* 17.1.5 */
/* 19 */ { BSSAP_IMSI_DETACH_INDICATION, "BSSAP+-IMSI-DETACH-INDICATION" }, /* 17.1.8 */
/* 20 */ { BSSAP_IMSI_DETACH_ACK, "BSSAP+-IMSI-DETACH-ACK" }, /* 17.1.7 */
/* 21 */ { BSSAP_RESET_INDICATION, "BSSAP+-RESET-INDICATION" }, /* 17.1.21 */
/* 22 */ { BSSAP_RESET_ACK, "BSSAP+-RESET-ACK" }, /* 17.1.20 */
/* 23 */ { BSSAP_MS_INFORMATION_REQUEST, "BSSAP+-MS-INFORMATION-REQUEST" }, /* 17.1.15 */
/* 24 */ { BSSAP_MS_INFORMATION_RESPONSE, "BSSAP+-MS-INFORMATION-RESPONSE" }, /* 17.1.16 */
/* 25 */ { 0x19, "Unassigned: treated as an unknown Message type." },
/* 26 */ { BSSAP_MM_INFORMATION_REQUEST, "BSSAP+-MM-INFORMATION-REQUEST" }, /* 17.1.12 */
/* 27 */ { 0x1b, "Unassigned: treated as an unknown Message type." },
/* 28 */ { 0x1c, "Unassigned: treated as an unknown Message type." },
/* 29 */ { BSSAP_MOBILE_STATUS, "BSSAP+-MOBILE-STATUS" }, /* 17.1.13 */
/* 30 */ { 0x1e, "Unassigned: treated as an unknown Message type." },
/* 31 */ { BSSAP_MS_UNREACHABLE, "BSSAP+-MS-UNREACHABLE" }, /* 17.1.17 */
{ 0, NULL }
};
static value_string_ext bssap_plus_message_type_values_ext = VALUE_STRING_EXT_INIT(bssap_plus_message_type_values);
#define BSSAP_IMSI 1
#define BSSAP_VLR_NUMBER 2
#define BSSAP_TMSI 3
#define BSSAP_LOC_AREA_ID 4
#define BSSAP_CHANNEL_NEEDED 5
#define BSSAP_EMLPP_PRIORITY 6
#define BSSAP_TMSI_STATUS 7
#define BSSAP_GS_CAUSE 8
#define BSSAP_SGSN_NUMBER 9
#define BSSAP_GPRS_LOC_UPD_TYPE 0x0a
#define BSSAP_GLOBAL_CN_ID 0x0b
#define BSSAP_MOBILE_STN_CLS_MRK1 0x0d
#define BSSAP_MOBILE_ID 0x0e
#define BSSAP_REJECT_CAUSE 0x0f
#define BSSAP_IMSI_DET_FROM_GPRS_SERV_TYPE 0x10
#define BSSAP_IMSI_DET_FROM_NON_GPRS_SERV_TYPE 0x11
#define BSSAP_INFO_REQ 0x12
#define BSSAP_PTMSI 0x13
#define BSSAP_IMEI 0x14
#define BSSAP_IMEISV 0x15
#define BSSAP_MM_INFORMATION 0x17
#define BSSAP_CELL_GBL_ID 0x18
#define BSSAP_LOC_INF_AGE 0x19
#define BSSAP_MOBILE_STN_STATE 0x1a
#define BSSAP_ERRONEOUS_MSG 0x1b
#define BSSAP_DLINK_TNL_PLD_CTR_AND_INF 0x1c
#define BSSAP_ULINK_TNL_PLD_CTR_AND_INF 0x1d
#define BSSAP_SERVICE_AREA_ID 0x1e
#define BSSAP_MSI_BASED_NRI_CON 0x1f
static const value_string bssap_plus_ie_id_values[] = {
{ BSSAP_IMSI, "IMSI" }, /* 18.4.10 */
{ BSSAP_VLR_NUMBER, "VLR number" }, /* 18.4.26 */
{ BSSAP_TMSI, "TMSI" }, /* 18.4.23 */
{ BSSAP_LOC_AREA_ID, "Location area identifier" }, /* 18.4.14 */
{ BSSAP_CHANNEL_NEEDED, "Channel Needed" }, /* 18.4.2 */
{ BSSAP_EMLPP_PRIORITY, "eMLPP Priority" }, /* 18.4.4 */
{ BSSAP_TMSI_STATUS, "TMSI status" }, /* 18.4.24 */
{ BSSAP_GS_CAUSE, "Gs cause" }, /* 18.4.7 */
{ BSSAP_SGSN_NUMBER, "SGSN number" }, /* 18.4.22 */
{ BSSAP_GPRS_LOC_UPD_TYPE, "GPRS location update type" }, /* 18.4.6 */
{ BSSAP_GLOBAL_CN_ID, "Global CN-Id" }, /* 18.4.27 */
{ 0x0c, "Unassigned: treated as an unknown IEI." }, /* 18 and 16 */
{ BSSAP_MOBILE_STN_CLS_MRK1, "Mobile station classmark 1" }, /* 18.4.18 */
{ BSSAP_MOBILE_ID, "Mobile identity" }, /* 18.4.17 */
{ BSSAP_REJECT_CAUSE, "Reject cause" }, /* 18.4.21 */
{ BSSAP_IMSI_DET_FROM_GPRS_SERV_TYPE, "IMSI detach from GPRS service type" }, /* 18.4.11 */
{ BSSAP_IMSI_DET_FROM_NON_GPRS_SERV_TYPE, "IMSI detach from non-GPRS service type" }, /* 18.4.12 */
{ BSSAP_INFO_REQ, "Information requested" }, /* 18.4.13 */
{ BSSAP_PTMSI, "PTMSI" }, /* 18.4.20 */
{ BSSAP_IMEI, "IMEI" }, /* 18.4.8 */
{ BSSAP_IMEISV, "IMEISV" }, /* 18.4.9 */
{ 0x16, "Unassigned: treated as an unknown IEI." }, /* 18 and 16 */
{ BSSAP_MM_INFORMATION, "MM information" }, /* 18.4.16 */
{ BSSAP_CELL_GBL_ID, "Cell Global Identity" }, /* 18.4.1 */
{ BSSAP_LOC_INF_AGE, "Location information age" }, /* 18.4.15 */
{ BSSAP_MOBILE_STN_STATE, "Mobile station state" }, /* 18.4.19 */
{ BSSAP_ERRONEOUS_MSG, "Erroneous message" }, /* 18.4.5 */
{ BSSAP_DLINK_TNL_PLD_CTR_AND_INF, "Downlink Tunnel Payload Control and Info" }, /* 18.4.3 */
{ BSSAP_ULINK_TNL_PLD_CTR_AND_INF, "Uplink Tunnel Payload Control and Info" }, /* 18.4.25 */
{ BSSAP_SERVICE_AREA_ID, "Service Area Identification" }, /* 18.4.21b */
{ BSSAP_MSI_BASED_NRI_CON, "TMSI based NRI container" }, /* 18.4.28 */
{ 0, NULL }
};
static value_string_ext bssap_plus_ie_id_values_ext = VALUE_STRING_EXT_INIT(bssap_plus_ie_id_values);
/* Initialize the protocol and registered fields */
static int proto_bssap = -1;
static int proto_bssap_plus = -1;
static int hf_bssap_pdu_type = -1;
static int hf_bsap_pdu_type = -1;
static int hf_bssap_dlci_cc = -1;
static int hf_bsap_dlci_cc = -1;
static int hf_bssap_dlci_spare = -1;
static int hf_bsap_dlci_rsvd = -1;
static int hf_bssap_dlci_sapi = -1;
static int hf_bsap_dlci_sapi = -1;
static int hf_bssap_length = -1;
static int hf_bssap_plus_ie = -1;
static int hf_bssap_plus_ie_len = -1;
static int hf_bssap_plus_message_type = -1;
static int hf_bssap_imsi_ie = -1;
static int hf_bssap_imsi_det_from_gprs_serv_type_ie = -1;
static int hf_bssap_imsi_det_from_non_gprs_serv_type_ie = -1;
static int hf_bssap_info_req_ie = -1;
static int hf_bssap_loc_area_id_ie = -1;
static int hf_bssap_loc_inf_age_ie = -1;
static int hf_bssap_mm_information_ie = -1;
static int hf_bssap_mobile_id_ie = -1;
static int hf_bssap_mobile_stn_cls_mrk1_ie = -1;
static int hf_bssap_mobile_station_state_ie = -1;
static int hf_bssap_ptmsi_ie = -1;
static int hf_bssap_reject_cause_ie = -1;
static int hf_bssap_service_area_id_ie = -1;
static int hf_bssap_sgsn_nr_ie = -1;
static int hf_bssap_tmsi_ie = -1;
static int hf_bssap_tmsi_status_ie = -1;
static int hf_bssap_vlr_number_ie = -1;
static int hf_bssap_global_cn_id_ie = -1;
static int hf_bssap_plus_ie_data = -1;
static int hf_bssap_extension = -1;
static int hf_bssap_type_of_number = -1;
static int hf_bssap_numbering_plan_id = -1;
static int hf_bssap_sgsn_number = -1;
/* static int hf_bssap_vlr_number = -1; */
static int hf_bssap_call_priority = -1;
static int hf_bssap_gprs_loc_upd_type_ie = -1;
static int hf_bssap_Gs_cause_ie = -1;
static int hf_bssap_imei_ie = -1;
static int hf_bssap_imesiv_ie = -1;
static int hf_bssap_cell_global_id_ie = -1;
static int hf_bssap_channel_needed_ie = -1;
static int hf_bssap_dlink_tnl_pld_cntrl_amd_inf_ie = -1;
static int hf_bssap_ulink_tnl_pld_cntrl_amd_inf_ie = -1;
static int hf_bssap_emlpp_prio_ie = -1;
static int hf_bssap_gprs_erroneous_msg_ie = -1;
static int hf_bssap_gprs_loc_upd_type = -1;
static int hf_bssap_Gs_cause = -1;
static int hf_bssap_imei = -1;
static int hf_bssap_imeisv = -1;
static int hf_bssap_imsi_det_from_gprs_serv_type = -1;
static int hf_bssap_info_req = -1;
static int hf_bssap_loc_inf_age = -1;
static int hf_bssap_mobile_station_state = -1;
static int hf_bssap_ptmsi = -1;
static int hf_bssap_tmsi = -1;
static int hf_bssap_tmsi_status = -1;
static int hf_bssap_tom_prot_disc = -1;
static int hf_bssap_e_bit = -1;
static int hf_bssap_tunnel_prio = -1;
static int hf_bssap_global_cn_id = -1;
static int hf_bssap_plmn_id = -1;
static int hf_bssap_cn_id = -1;
static int hf_bssap_cell_global_id = -1;
static int hf_bssap_extraneous_data = -1;
static int hf_bssap_conditional_ie = -1;
/* Initialize the subtree pointers */
static gint ett_bssap = -1;
static gint ett_bssap_dlci = -1;
static gint ett_bssap_imsi = -1;
static gint ett_bssap_imsi_det_from_gprs_serv_type = -1;
static gint ett_bssap_imsi_det_from_non_gprs_serv_type = -1;
static gint ett_bssap_info_req = -1;
static gint ett_bssap_loc_area_id = -1;
static gint ett_bssap_loc_inf_age = -1;
static gint ett_bssap_mm_information = -1;
static gint ett_bssap_mobile_id = -1;
static gint ett_bssap_sgsn_nr = -1;
static gint ett_bssap_tmsi = -1;
static gint ett_bssap_tmsi_status = -1;
static gint ett_bssap_vlr_number = -1;
static gint ett_bssap_global_cn = -1;
static gint ett_bssap_gprs_loc_upd = -1;
static gint ett_bassp_Gs_cause = -1;
static gint ett_bassp_imei = -1;
static gint ett_bassp_imesiv = -1;
static gint ett_bssap_cell_global_id = -1;
static gint ett_bssap_cgi = -1;
static gint ett_bssap_channel_needed = -1;
static gint ett_bssap_dlink_tnl_pld_cntrl_amd_inf = -1;
static gint ett_bssap_ulink_tnl_pld_cntrl_amd_inf = -1;
static gint ett_bssap_emlpp_prio = -1;
static gint ett_bssap_erroneous_msg = -1;
static gint ett_bssap_mobile_stn_cls_mrk1 = -1;
static gint ett_bssap_mobile_station_state = -1;
static gint ett_bssap_ptmsi = -1;
static gint ett_bssap_reject_cause = -1;
static gint ett_bssap_service_area_id =-1;
static gint ett_bssap_global_cn_id = -1;
static gint ett_bssap_plmn = -1;
static expert_field ei_bssap_unknown_message = EI_INIT;
static expert_field ei_bssap_unknown_parameter = EI_INIT;
static expert_field ei_bssap_mandatory_ie = EI_INIT;
static dissector_handle_t rrlp_handle;
static dissector_table_t bssap_dissector_table;
static dissector_table_t bsap_dissector_table;
static dissector_handle_t gsm_bssmap_le_dissector_handle;
static dissector_handle_t gsm_a_bssmap_dissector_handle;
/*
* Keep track of pdu_type so we can call appropriate sub-dissector
*/
static guint8 pdu_type = 0xFF;
static gint bssap_or_bsap_global = BSSAP_OR_BSAP_DEFAULT;
static gint gsm_or_lb_interface_global = GSM_OR_LB_INTERFACE_DEFAULT;
static void
dissect_bssap_data_param(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *bssap_tree, proto_tree *tree, struct _sccp_msg_info_t* sccp_info)
{
if ((pdu_type <= 0x01))
{
if (bssap_or_bsap_global == BSSAP)
{
/* BSSAP */
if((gsm_or_lb_interface_global == LB_INTERFACE) && (pdu_type == BSSAP_PDU_TYPE_BSSMAP))
{
call_dissector_with_data(gsm_bssmap_le_dissector_handle, tvb, pinfo, tree, sccp_info);
return;
}
else if((gsm_or_lb_interface_global == GSM_INTERFACE) && (pdu_type == BSSAP_PDU_TYPE_BSSMAP))
{
call_dissector_with_data(gsm_a_bssmap_dissector_handle, tvb, pinfo, tree, sccp_info);
return;
}
else
{
if (dissector_try_uint_new(bssap_dissector_table, pdu_type, tvb, pinfo, tree, TRUE, sccp_info)) return;
}
}
else
{
/* BSAP */
if (dissector_try_uint_new(bsap_dissector_table, pdu_type, tvb, pinfo, tree, TRUE, sccp_info))
return;
}
}
/* No sub-dissection occurred, treat it as raw data */
call_data_dissector(tvb, pinfo, bssap_tree);
}
static void
dissect_bssap_dlci_param(tvbuff_t *tvb, proto_tree *tree, guint16 length)
{
proto_tree *dlci_tree;
guint8 oct;
dlci_tree =
proto_tree_add_subtree(tree, tvb, 0, length,
ett_bssap_dlci, NULL, "Data Link Connection Identifier");
oct = tvb_get_guint8(tvb, 0);
if (bssap_or_bsap_global == BSSAP)
{
proto_tree_add_uint(dlci_tree, hf_bssap_dlci_cc, tvb, 0, length, oct);
proto_tree_add_uint(dlci_tree, hf_bssap_dlci_spare, tvb, 0, length, oct);
proto_tree_add_uint(dlci_tree, hf_bssap_dlci_sapi, tvb, 0, length, oct);
}
else
{
proto_tree_add_uint(dlci_tree, hf_bsap_dlci_cc, tvb, 0, length, oct);
proto_tree_add_uint(dlci_tree, hf_bsap_dlci_rsvd, tvb, 0, length, oct);
proto_tree_add_uint(dlci_tree, hf_bsap_dlci_sapi, tvb, 0, length, oct);
}
}
static void
dissect_bssap_length_param(tvbuff_t *tvb, proto_tree *tree, guint16 length)
{
guint8 data_length;
data_length = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_bssap_length, tvb, 0, length, data_length);
}
/*
* Dissect a parameter given its type, offset into tvb, and length.
*/
static guint16
dissect_bssap_parameter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *bssap_tree,
proto_tree *tree, guint8 parameter_type, gint offset,
guint16 parameter_length, struct _sccp_msg_info_t* sccp_info)
{
tvbuff_t *parameter_tvb;
parameter_tvb = tvb_new_subset_length(tvb, offset, parameter_length);
switch (parameter_type)
{
case PARAMETER_DLCI:
dissect_bssap_dlci_param(parameter_tvb, bssap_tree, parameter_length);
break;
case PARAMETER_LENGTH:
dissect_bssap_length_param(parameter_tvb, bssap_tree, parameter_length);
break;
case PARAMETER_DATA:
dissect_bssap_data_param(parameter_tvb, pinfo, bssap_tree, tree, sccp_info);
break;
default:
proto_tree_add_expert_format(bssap_tree, pinfo, &ei_bssap_unknown_parameter, parameter_tvb, 0, parameter_length,
"Unknown parameter 0x%x (%u byte%s)", parameter_type, parameter_length, plurality(parameter_length, "", "s"));
break;
}
return(parameter_length);
}
static guint16
dissect_bssap_var_parameter(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *bssap_tree, proto_tree *tree,
guint8 parameter_type, gint offset, struct _sccp_msg_info_t* sccp_info)
{
guint16 parameter_length;
guint8 length_length;
parameter_length = tvb_get_guint8(tvb, offset);
length_length = LENGTH_LENGTH;
offset += length_length;
dissect_bssap_parameter(tvb, pinfo, bssap_tree, tree, parameter_type,
offset, parameter_length, sccp_info);
return(parameter_length + length_length);
}
static int
dissect_bssap_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *bssap_tree,
proto_tree *tree, struct _sccp_msg_info_t* sccp_info)
{
gint offset;
proto_item* type_item;
/*
* Extract the PDU type
*/
pdu_type = tvb_get_guint8(tvb, PDU_TYPE_OFFSET);
offset = PDU_TYPE_LENGTH;
/*
* add the message type to the protocol tree
*/
type_item = proto_tree_add_uint(bssap_tree,
(bssap_or_bsap_global == BSSAP) ? hf_bssap_pdu_type : hf_bsap_pdu_type,
tvb, PDU_TYPE_OFFSET, PDU_TYPE_LENGTH, pdu_type);
/* Starting a new message dissection */
switch (pdu_type)
{
case BSSAP_PDU_TYPE_BSSMAP:
offset += dissect_bssap_parameter(tvb, pinfo, bssap_tree, tree,
PARAMETER_LENGTH, offset,
LENGTH_LENGTH, sccp_info);
offset += dissect_bssap_var_parameter(tvb, pinfo, bssap_tree, tree,
PARAMETER_DATA,
(offset - LENGTH_LENGTH), sccp_info);
break;
case BSSAP_PDU_TYPE_DTAP:
offset += dissect_bssap_parameter(tvb, pinfo, bssap_tree, tree,
PARAMETER_DLCI,
offset, DLCI_LENGTH, sccp_info);
offset += dissect_bssap_parameter(tvb, pinfo, bssap_tree, tree,
PARAMETER_LENGTH, offset,
LENGTH_LENGTH, sccp_info);
offset += dissect_bssap_var_parameter(tvb, pinfo, bssap_tree, tree,
PARAMETER_DATA,
(offset - LENGTH_LENGTH), sccp_info);
break;
default:
{
guint32 message_length;
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
val_to_str_const(pdu_type,
((bssap_or_bsap_global == BSSAP) ?
bssap_pdu_type_acro_values : bsap_pdu_type_acro_values),
"Unknown"));
message_length = tvb_reported_length(tvb);
expert_add_info_format(pinfo, type_item, &ei_bssap_unknown_message, "Unknown message (%u byte%s)",
message_length, plurality(message_length, "", "s"));
}
break;
}
return offset;
}
static int
dissect_bssap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
proto_item *bssap_item;
proto_tree *bssap_tree;
struct _sccp_msg_info_t* sccp_info = (struct _sccp_msg_info_t*)data;
/*
* Make entry in the Protocol column on summary display
*/
col_set_str(pinfo->cinfo, COL_PROTOCOL, ((bssap_or_bsap_global == BSSAP) ? "BSSAP" : "BSAP"));
if (sccp_info && sccp_info->data.co.assoc )
sccp_info->data.co.assoc->payload = SCCP_PLOAD_BSSAP;
/*
* create the bssap protocol tree
*/
bssap_item = proto_tree_add_protocol_format(tree, proto_bssap, tvb, 0, -1,
(bssap_or_bsap_global == BSSAP) ? "BSSAP" : "BSAP");
bssap_tree = proto_item_add_subtree(bssap_item, ett_bssap);
/* dissect the message */
return dissect_bssap_message(tvb, pinfo, bssap_tree, tree, sccp_info);
}
/*
* BSSAP+ Routines
*/
#ifdef REMOVED
static dgt_set_t Dgt_tbcd = {
{
/* 0 1 2 3 4 5 6 7 8 9 a b c d e */
'0','1','2','3','4','5','6','7','8','9','?','B','C','*','#','?'
}
};
#endif
static gboolean
check_ie(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int *offset, guint8 expected_ie)
{
guint8 ie_type;
guint8 ie_len;
ie_type = tvb_get_guint8(tvb, *offset);
if (ie_type != expected_ie) {
proto_tree_add_expert_format(tree, pinfo, &ei_bssap_mandatory_ie, tvb, *offset, 1, "Mandatory IE %s expected but IE %s Found",
val_to_str_ext(expected_ie, &bssap_plus_ie_id_values_ext, "Unknown %u"),
val_to_str_ext(ie_type, &bssap_plus_ie_id_values_ext, "Unknown %u"));
(*offset)++;
ie_len = tvb_get_guint8(tvb, *offset);
*offset = *offset + ie_len;
return FALSE;
}
return TRUE;
}
static gboolean
check_optional_ie(tvbuff_t *tvb, int offset, guint8 expected_ie)
{
guint8 ie_type;
ie_type = tvb_get_guint8(tvb, offset);
if (ie_type != expected_ie) {
return FALSE;
}
return TRUE;
}
/* 18.4.1 Cell global identity */
static int
dissect_bssap_cell_global_id(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
proto_item *cgi_item;
proto_tree *cgi_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_cell_global_id_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_cell_global_id);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/*
* The rest of the information element is coded as the the value part
* of the cell global id IE defined in 3GPP TS 48.018 (not including
* 3GPP TS 48.018 IEI and 3GPP TS 48.018 length indicator).
*/
cgi_item = proto_tree_add_item(ie_tree, hf_bssap_cell_global_id, tvb, offset, ie_len, ENC_NA);
cgi_tree = proto_item_add_subtree(cgi_item, ett_bssap_cgi);
/* octets 3-8 Octets 3 to 8 contain the value part (starting with octet 2) of the
* Routing Area Identification IE defined in 3GPP TS 24.008, not
* including 3GPP TS 24.008 IEI
*/
de_gmm_rai(tvb, cgi_tree, pinfo, offset, ie_len, NULL, 0);
/* Octets 9 and 10 contain the value part (starting with octet 2) of the
* Cell Identity IE defined in 3GPP TS 24.008, not including
* 3GPP TS 24.008 IEI
*/
offset = offset + 6;
de_cell_id(tvb, cgi_tree, pinfo, offset, ie_len, NULL, 0);
offset = offset + 2;
return offset;
}
/* 18.4.2 Channel needed */
static int
dissect_bssap_channel_needed(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_channel_needed_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_channel_needed);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/*
* The rest of the information element is coded as the IEI part and the
* value part of the Channel Needed IE defined in 3GPP TS 44.018.
* 10.5.2.8 Channel Needed
*/
de_rr_chnl_needed(tvb, ie_tree, pinfo, offset, ie_len, NULL, 0);
return offset + ie_len;
}
/* 18.4.3 Downlink Tunnel Payload Control and Info */
static int
dissect_bssap_dlink_tunnel_payload_control_and_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
tvbuff_t *next_tvb;
guint8 ie_len;
guint8 octet;
guint8 prot_disc;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_dlink_tnl_pld_cntrl_amd_inf_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_dlink_tnl_pld_cntrl_amd_inf);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* Bit 8 Spare */
/* Bit 7 - 4
* TOM Protocol Discriminator: Identifies the protocol using tunnelling of non-GSM signalling.
* For coding, see 3GPP TS 44.064.
*/
proto_tree_add_item(ie_tree, hf_bssap_tom_prot_disc, tvb, offset, 1, ENC_BIG_ENDIAN);
octet = tvb_get_guint8(tvb, offset);
prot_disc = (octet&0x78)>>3;
/* octet 3 bit 3 E: Cipher Request. When set to 1 indicates that the SGSN received the payload in ciphered form,
* when set to 0 indicates that the SGSN did not receive the payload in ciphered form.
*/
proto_tree_add_item(ie_tree, hf_bssap_e_bit, tvb, offset, 1, ENC_BIG_ENDIAN);
/* octet 3 bit 2 - 1
* Tunnel Priority: Indicates the priority of the Tunnel Payload. For coding, see Table 20.1: Association
* between Tunnel Priority and LLC SAPs.
*/
proto_tree_add_item(ie_tree, hf_bssap_tunnel_prio, tvb, offset, 1, ENC_BIG_ENDIAN);
/* Tunnel payload */
next_tvb = tvb_new_subset_length(tvb, offset, ie_len-4);
if ((prot_disc == 2)&&(rrlp_handle))
call_dissector(rrlp_handle, next_tvb, pinfo, ie_tree);
else
call_data_dissector(next_tvb, pinfo, ie_tree);
return offset + ie_len;
}
/* 18.4.4 eMLPP Priority */
/* Call priority */
static const value_string bssap_call_priority_values[] = {
{ 0x00, "No priority applied" },
{ 0x01, "Call priority level 4" },
{ 0x02, "Call priority level 3" },
{ 0x03, "Call priority level 2" },
{ 0x04, "Call priority level 1" },
{ 0x05, "Call priority level 0" },
{ 0x06, "Call priority level B" },
{ 0x07, "Call priority level A" },
{ 0, NULL }
};
static int
dissect_bssap_emlpp_priority(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_emlpp_prio_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_emlpp_prio);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The rest of the information element is coded as the value part of
the eMLPP-Priority IE defined in 3GPP TS 48.008 (not including
3GPP TS 48.008 IEI and 3GPP TS 48.008 length indicator).
3.2.2.56 eMLPP Priority
The call priority field (bit 3 to 1 of octet 2) is coded in the same way
as the call priority field (bit 3 to 1 of octet 5) in the Descriptive group
or broadcast call reference information element as defined in 3GPP TS 24.008.
*/
proto_tree_add_item(ie_tree, hf_bssap_call_priority, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* 18.4.5 Erroneous message */
/* Erroneous message including the message type. */
static int
dissect_bssap_gprs_erroneous_msg(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_gprs_erroneous_msg_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_erroneous_msg);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* Erroneous message including the message type. */
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_data, tvb, offset, ie_len, ENC_NA);
return offset + ie_len;
}
static const value_string bssap_plus_GPRS_loc_upd_type_values[] = {
{ 0x00, "Shall not be sent in this version of the protocol. If received, shall be treated as '00000010'." },
{ 0x01, "IMSI attach" },
{ 0x02, "Normal location update" },
{ 0, NULL }
};
/* 18.4.6 GPRS location update type */
static int
dissect_bssap_gprs_location_update_type(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_gprs_loc_upd_type_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_gprs_loc_upd);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* GPRS location update type value (octet 3) */
proto_tree_add_item(ie_tree, hf_bssap_gprs_loc_upd_type, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* Gs Cause value (octet 3) */
static const value_string bssap_Gs_cause_values[] = {
{ 0x00, "Normal, unspecified in this version of the protocol." },
{ 0x01, "IMSI detached for GPRS services" },
{ 0x02, "IMSI detached for GPRS and non-GPRS services" },
{ 0x03, "IMSI unknown" },
{ 0x04, "IMSI detached for non-GPRS services" },
{ 0x05, "IMSI implicitly detached for non-GPRS services" },
{ 0x06, "MS unreachable" },
{ 0x07, "Message not compatible with the protocol state" },
{ 0x08, "Missing mandatory information element" },
{ 0x09, "Invalid mandatory information" },
{ 0x0a, "Conditional IE error" },
{ 0x0b, "Semantically incorrect message" },
{ 0x0c, "Message unknown" },
{ 0x0d, "Address error" },
{ 0x0e, "TOM functionality not supported" },
{ 0x0f, "Ciphering request cannot be accommodated" },
{ 0, NULL }
};
/* 18.4.7 Gs cause */
static int
dissect_bssap_Gs_cause(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_Gs_cause_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bassp_Gs_cause);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* Gs Cause value (octet 3) */
proto_tree_add_item(ie_tree, hf_bssap_Gs_cause, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* 18.4.8 IMEI */
static int
dissect_bssap_imei(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
tvbuff_t *ie_tvb;
const char *digit_str;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_imei_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bassp_imei);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The IMEI is coded as a sequence of BCD digits, compressed two into each octet.
* The IMEI consists of 15 digits (see 3GPP TS 23.003).
*/
ie_tvb = tvb_new_subset_length(tvb, offset, ie_len);
digit_str = tvb_bcd_dig_to_wmem_packet_str(ie_tvb, 0, -1, NULL, FALSE);
proto_tree_add_string(ie_tree, hf_bssap_imei, ie_tvb, 0, -1, digit_str);
return offset + ie_len;
}
/* 18.4.9 IMEISV */
static int
dissect_bssap_imesiv(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
tvbuff_t *ie_tvb;
const char *digit_str;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_imesiv_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bassp_imesiv);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The IMEISV is coded as a sequence of BCD digits, compressed two into each octet.
* The IMEISV consists of 16 digits (see 3GPP TS 23.003).
*/
ie_tvb = tvb_new_subset_length(tvb, offset, ie_len);
digit_str = tvb_bcd_dig_to_wmem_packet_str(ie_tvb, 0, -1, NULL, FALSE);
proto_tree_add_string(ie_tree, hf_bssap_imeisv, ie_tvb, 0, -1, digit_str);
return offset + ie_len;
}
/* 18.4.10 IMSI
* The IMSI is coded as a sequence of BCD digits, compressed two into each octet.
* This is a variable length element, and includes a length indicator.
* The IMSI is defined in 3GPP TS 23.003. It shall not exceed 15 digits (see 3GPP TS 23.003).
*/
static int
dissect_bssap_imsi(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
tvbuff_t *ie_tvb;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_imsi_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_imsi);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
ie_tvb = tvb_new_subset_length(tvb, offset, ie_len);
dissect_e212_imsi(ie_tvb, pinfo, tree, 0, ie_len, TRUE);
return offset + ie_len;
}
static const value_string bssap_imsi_det_from_gprs_serv_type_values[] _U_ = {
{ 0x00, "Interpreted as reserved in this version of the protocol" },
{ 0x01, "Network initiated IMSI detach from GPRS service" },
{ 0x02, "MS initiated IMSI detach from GPRS service" },
{ 0x03, "GPRS services not allowed" },
{ 0, NULL }
};
/* 18.4.11 IMSI detach from GPRS service type */
static int
dissect_bssap_imsi_det_from_gprs_serv_type(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_imsi_det_from_gprs_serv_type_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_imsi_det_from_gprs_serv_type);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* IMSI detach from GPRS service type value (octet 3)*/
proto_tree_add_item(ie_tree, hf_bssap_imsi_det_from_gprs_serv_type, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* 18.4.12 IMSI detach from non-GPRS service type */
static int
dissect_bssap_imsi_det_from_non_gprs_serv_type(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_imsi_det_from_non_gprs_serv_type_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_imsi_det_from_non_gprs_serv_type);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_data, tvb, offset, ie_len, ENC_NA);
return offset + ie_len;
}
static const value_string bssap_info_req_values[] = {
{ 0x00, "Interpreted as Not supported in this version of the protocol." },
{ 0x01, "PTMSI" },
{ 0x02, "IMEI" },
{ 0x03, "IMEISV" },
{ 0x04, "PTMSI and IMEI" },
{ 0x05, "PTMSI and IMEISV" },
{ 0x06, "IMEI and IMEISV" },
{ 0x07, "PTMSI, IMEI, and IMEISV" },
{ 0x08, "Mobile location information" },
{ 0x09, "TMSI" },
{ 0, NULL }
};
/* 18.4.13 Information requested */
static int
dissect_bssap_info_req(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_info_req_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_info_req);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/*Information requested value (octet 3) */
proto_tree_add_item(ie_tree, hf_bssap_info_req, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* 18.4.14 Location area identifier */
static int
dissect_bssap_loc_area_id(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_loc_area_id_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_loc_area_id);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The rest of the information element is coded as the value part of
* the location area identifier IE defined in 3GPP TS 48.018 (not
* including 3GPP TS 48.018 IEI and 3GPP TS 48.018 length
* indicator).
*/
de_lai(tvb, ie_tree, pinfo, offset, ie_len, NULL, 0);
return offset + ie_len;
}
/* 18.4.15 Location information age */
static int
dissect_bssap_location_information_age(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_loc_inf_age_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_loc_inf_age);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The rest of the IE is coded as the value part of the
* AgeOfLocationInformation as specified in 3GPP TS 29.002.:
* AgeOfLocationInformation ::= INTEGER (0..32767)
* -- the value represents the elapsed time in minutes since the last
* -- network contact of the mobile station (i.e. the actuality of the
* -- location information).
* -- value '0' indicates that the MS is currently in contact with the
* -- network
* -- value '32767' indicates that the location information is at least
* -- 32767 minutes old
*/
proto_tree_add_item(ie_tree, hf_bssap_loc_inf_age, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* 18.4.16 MM information */
static int
dissect_bssap_MM_information(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_mm_information_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_mm_information);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* User information: This field is composed of one or more of the
* information elements of the MM information message as defined
* 3GPP TS 24.008, excluding the Protocol discriminator, Skip
* indicator and Message type. This field includes the IEI and length
* indicatior of the other information elements.
*/
dtap_mm_mm_info(tvb, ie_tree, pinfo, offset, ie_len);
return offset + ie_len;
}
/* 18.4.17 Mobile identity */
static int
dissect_bssap_mobile_id(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_mobile_id_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_mobile_id);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The rest of the information element is coded as the value part of
* the mobile identity IE defined in 3GPP TS 24.008 (not including
* 3GPP TS 24.008 IEI and 3GPP TS 24.008 length indicator).
*/
de_mid(tvb, ie_tree, pinfo, offset, ie_len, NULL, 0);
return offset + ie_len;
}
/* 18.4.18 Mobile station classmark 1 */
static int
dissect_bssap_mobile_stn_cls_mrk1(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_mobile_stn_cls_mrk1_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_mobile_stn_cls_mrk1);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The rest of the information element is coded as the value part of
* the mobile station classmark 1 IE defined in 3GPP TS 24.008 (not
* including 3GPP TS 24.008 IEI)
*/
de_ms_cm_1(tvb, ie_tree, pinfo, offset, ie_len, NULL, 0);
return offset + ie_len;
}
/* 18.4.19 Mobile station state */
static const value_string bssap_mobile_station_state_values[] = {
{ 0x00, "IDLE or PMM-DETACHED" },
{ 0x01, "STANDBY or PMM-IDLE, 0 PDP contexts active" },
{ 0x02, "STANDBY or PMM-IDLE, 1 or more PDP contexts active" },
{ 0x03, "SUSPENDED, 0 PDP contexts active" },
{ 0x04, "SUSPENDED, 1 or more PDP contexts active" },
{ 0x05, "READY or PMM-CONNECTED, 0 PDP contexts active" },
{ 0x06, "READY or PMM-CONNECTED, 1 or more PDP contexts active" },
{ 0x07, "IMSI unknown" },
{ 0x08, "Information requested not supported" },
{ 0, NULL }
};
static int
dissect_bssap_mobile_station_state(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_mobile_station_state_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_mobile_station_state);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* Mobile station state value (octet 3) */
proto_tree_add_item(ie_tree, hf_bssap_mobile_station_state, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* 18.4.20 PTMSI */
static int
dissect_bssap_ptmsi(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_ptmsi_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_ptmsi);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The PTMSI consists of 4 octets. It can be coded using a full hexadecimal representation
* (see 3GPP TS 23.003).
*/
proto_tree_add_item(ie_tree, hf_bssap_ptmsi, tvb, offset, ie_len, ENC_NA);
return offset + ie_len;
}
/* 18.4.21 Reject cause */
static int
dissect_bssap_reject_cause(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_reject_cause_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_reject_cause);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The rest of the information element is coded as the value part of
* the reject cause IE defined in 3GPP TS 24.008, not including
* 3GPP TS 24.008 IEI.
*/
de_rej_cause(tvb, ie_tree, pinfo, offset, ie_len, NULL, 0);
return offset + ie_len;
}
/* 18.4.21b Service Area Identification */
static int
dissect_bssap_service_area_id(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_service_area_id_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_service_area_id);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The rest of the information element is coded as the the value part
* of the SAI IE defined in 3GPP TS 25.413 (not including
* 3GPP TS 25.413 IEI and 3GPP TS 25.413 length indicator).
*/
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_data, tvb, offset, ie_len, ENC_NA);
return offset + ie_len;
}
/* 18.4.22 SGSN number */
static const true_false_string bssap_extension_value = {
"No Extension",
"Extension"
};
static int
dissect_bssap_sgsn_number(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
tvbuff_t *number_tvb;
const char *digit_str;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_sgsn_nr_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_sgsn_nr);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The SGSN number is coded as a sequence of TBCD digits (as specified in 3GPP TS 29.002),
* compressed two into each octet. The Number is in international E.164 format as indicated by Octet 3
* which coding is specified in 3GPP TS 29.002. This is a variable length information element,
* and includes a length indicator. The value part of the SGSN number information element
* (not including IEI, Length indicator and Octet 3) shall not exceed 15 digits.
*/
proto_tree_add_item(ie_tree, hf_bssap_extension, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ie_tree, hf_bssap_type_of_number, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ie_tree, hf_bssap_numbering_plan_id, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
number_tvb = tvb_new_subset_length(tvb, offset, ie_len-1);
digit_str = tvb_bcd_dig_to_wmem_packet_str(number_tvb, 0, -1, NULL, FALSE);
proto_tree_add_string(ie_tree, hf_bssap_sgsn_number, number_tvb, 0, -1, digit_str);
return offset + ie_len-1;
}
/* 18.4.23 TMSI */
static int
dissect_bssap_tmsi(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_tmsi_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_tmsi);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The TMSI consists of 4 octets. It can be coded using a full hexadecimal representation
* (see 3GPP TS 23.003).
*/
proto_tree_add_item(ie_tree, hf_bssap_tmsi, tvb, offset, ie_len, ENC_NA);
return offset + ie_len;
}
/* 18.4.24 TMSI status */
static const true_false_string bssap_tmsi_flag = {
"Valid TMSI available",
"No valid TMSI available"
};
static int
dissect_bssap_tmsi_status(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_tmsi_status_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_tmsi_status);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* TMSI flag (octet 3) */
proto_tree_add_item(ie_tree, hf_bssap_tmsi_status, tvb, offset, ie_len, ENC_BIG_ENDIAN);
return offset + ie_len;
}
/* 18.4.25 Uplink Tunnel Payload Control and Info */
static const true_false_string bssap_E_flag = {
"SGSN received the payload in ciphered",
"SGSN did not receive the payload in ciphered form"
};
/* 3GPP TS 44.064 B.1.1 TOM Protocol Discriminator */
static const value_string bssap_tom_prot_disc_values[] = {
{ 0x00, "Not specified" },
{ 0x01, "TIA/EIA-136" },
{ 0x02, "RRLP" },
{ 0x03, "Reserved for extension" },
{ 0, NULL }
};
static int
dissect_bssap_ulink_tunnel_payload_control_and_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
tvbuff_t *next_tvb;
guint8 ie_len;
guint8 octet;
guint8 prot_disc;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_ulink_tnl_pld_cntrl_amd_inf_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_ulink_tnl_pld_cntrl_amd_inf);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* octet 3 bit 8 Spare */
/* octet 3 bit 7 - 4
* TOM Protocol Discriminator: Identifies the protocol using tunnelling of non-GSM signalling.
* For coding, see 3GPP TS 44.064.
*/
proto_tree_add_item(ie_tree, hf_bssap_tom_prot_disc, tvb, offset, 1, ENC_BIG_ENDIAN);
octet = tvb_get_guint8(tvb, offset);
prot_disc = (octet&0x78)>>3;
/* octet 3 bit 3 E: Cipher Request. When set to 1 indicates that the SGSN received the payload in ciphered form,
* when set to 0 indicates that the SGSN did not receive the payload in ciphered form.
*/
proto_tree_add_item(ie_tree, hf_bssap_e_bit, tvb, offset, 1, ENC_BIG_ENDIAN);
/* octet 3 bit 2 - 1
* Tunnel Priority: Indicates the priority of the Tunnel Payload. For coding, see Table 20.1: Association
* between Tunnel Priority and LLC SAPs.
*/
proto_tree_add_item(ie_tree, hf_bssap_tunnel_prio, tvb, offset, 1, ENC_BIG_ENDIAN);
/* Tunnel payload */
next_tvb = tvb_new_subset_length(tvb, offset, ie_len - 4);
if ((prot_disc == 2)&&(rrlp_handle))
call_dissector(rrlp_handle, next_tvb, pinfo, ie_tree);
else
call_data_dissector(next_tvb, pinfo, ie_tree);
return offset + ie_len;
}
/* 18.4.26 VLR number */
static int
dissect_bssap_vlr_number(tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
guint8 ie_len;
tvbuff_t *number_tvb;
const char *digit_str;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_vlr_number_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_vlr_number);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The VLR number is coded as a sequence of TBCD digits (as specified in 3GPP TS 29.002),
* compressed two into each octet. The Number is in international E.164 format as indicated by Octet 3
* which coding is specified in 3GPP TS 29.002. This is a variable length information element,
* and includes a length indicator. The value part of the VLR number information element
* (not including IEI, length indicator and Octet 3), shall not exceed 15 digits.
*/
proto_tree_add_item(ie_tree, hf_bssap_extension, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ie_tree, hf_bssap_type_of_number, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ie_tree, hf_bssap_numbering_plan_id, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
number_tvb = tvb_new_subset_length(tvb, offset, ie_len - 1);
digit_str = tvb_bcd_dig_to_wmem_packet_str(number_tvb, 0, -1, NULL, FALSE);
proto_tree_add_string(ie_tree, hf_bssap_sgsn_number, number_tvb, 0, -1, digit_str);
return offset + ie_len - 1;
}
/* 18.4.27 Global CN-Id */
static int
dissect_bssap_global_cn_id(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
{
proto_item *item;
proto_tree *ie_tree;
proto_item *plmn_item;
proto_tree *plmn_tree;
proto_item *global_cn_id_item;
proto_tree *global_cn_id_tree;
guint8 ie_len;
ie_len = tvb_get_guint8(tvb, offset+1);
item = proto_tree_add_item(tree, hf_bssap_global_cn_id_ie, tvb, offset, ie_len+2, ENC_NA);
ie_tree = proto_item_add_subtree(item, ett_bssap_global_cn);
proto_tree_add_item(ie_tree, hf_bssap_plus_ie, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(ie_tree, hf_bssap_plus_ie_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* The Global CN-Id consists of a PLMN-Id and a CN-Id, see 3GPP TS 23.003.
* The PLMN-Id consists of MCC and MNC coded according to Location Area Identification
* in 3GPP TS 24.008. The CN-Id is an integer defined by O&M.
* The least significant bit of the CN-Id field is bit 1 of octet 7 and
* the most significant bit is bit 8 of octet 6. If the CN-Id does not fill the field reserved for it,
* the rest of the bits are set to '0'.
*/
global_cn_id_item = proto_tree_add_item(ie_tree, hf_bssap_global_cn_id, tvb, offset, ie_len, ENC_NA);
global_cn_id_tree = proto_item_add_subtree(global_cn_id_item, ett_bssap_global_cn_id);
/* Octet 3 - 5 PLMN-Id Coded as octets 2 to 4 of the Location Area Identification IE,
* defined in 3GPP TS 24.008 (not including 3GPP TS 24.008 IEI and LAC).
*/
plmn_item = proto_tree_add_item(global_cn_id_tree, hf_bssap_plmn_id, tvb, offset, 3, ENC_NA);
plmn_tree = proto_item_add_subtree(plmn_item, ett_bssap_plmn);
dissect_e212_mcc_mnc(tvb, pinfo, plmn_tree, offset, E212_NONE, TRUE);
offset = offset + 3;
/* Octet 6 - 7 CN-Id (INTEGER 0..4095) */
proto_tree_add_item(global_cn_id_tree, hf_bssap_cn_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset = offset+2;
return offset;
}
static int dissect_bssap_plus(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
proto_item *bssap_item;
proto_tree *bssap_tree;
guint8 message_type;
int offset = 0;
struct _sccp_msg_info_t* sccp_info = (struct _sccp_msg_info_t*)data;
/*
* Make entry in the Protocol column on summary display
*/
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BSSAP+");
if (sccp_info && sccp_info->data.co.assoc)
sccp_info->data.co.assoc->payload = SCCP_PLOAD_BSSAP;
/* create the BSSAP+ protocol tree */
bssap_item = proto_tree_add_item(tree, proto_bssap, tvb, 0, -1, ENC_NA);
bssap_tree = proto_item_add_subtree(bssap_item, ett_bssap);
message_type = tvb_get_guint8(tvb, offset);
proto_tree_add_item(bssap_tree, hf_bssap_plus_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
col_add_str(pinfo->cinfo, COL_INFO, val_to_str_ext(message_type, &bssap_plus_message_type_values_ext, "Unknown %u"));
switch (message_type) {
case BSSAP_PAGING_REQUEST:
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* VLR number VLR number 18.4.26 M TLV 5-11 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_VLR_NUMBER))
offset = dissect_bssap_vlr_number(tvb, bssap_tree, offset);
/* End of mandatory elements */
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* TMSI TMSI 18.4.23 O TLV 6 */
if (check_optional_ie(tvb, offset, BSSAP_TMSI))
offset = dissect_bssap_tmsi(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Location area identifier Location area identifier 18.4.14 O TLV 7 */
if (check_optional_ie(tvb, offset, BSSAP_LOC_AREA_ID))
offset = dissect_bssap_loc_area_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Channel needed Channel needed 18.4.2 O TLV 3 */
if (check_optional_ie(tvb, offset, BSSAP_CHANNEL_NEEDED))
offset = dissect_bssap_channel_needed(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* eMLPP Priority eMLPP Priority 18.4.4 O TLV 3 */
if (check_optional_ie(tvb, offset, BSSAP_EMLPP_PRIORITY))
offset = dissect_bssap_emlpp_priority(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Global CN-Id Global CN-Id 18.4.27 O TLV 7 */
if (check_optional_ie(tvb, offset, BSSAP_GLOBAL_CN_ID))
offset = dissect_bssap_global_cn_id(tvb, pinfo, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_PAGING_REJECT: /* 17.1.18 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* Gs Cause Gs Cause 18.4.7 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_GS_CAUSE))
offset = dissect_bssap_Gs_cause(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_DOWNLINK_TUNNEL_REQUEST: /* 17.1.4 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* VLR number VLR number 18.4.26 M TLV 5-11 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_VLR_NUMBER))
offset = dissect_bssap_vlr_number(tvb, bssap_tree, offset);
/* Downlink Tunnel Payload Control and Info 18.4.3 M TLV 3-223 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_DLINK_TNL_PLD_CTR_AND_INF))
offset = dissect_bssap_dlink_tunnel_payload_control_and_info(tvb, pinfo, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_UPLINK_TUNNEL_REQUEST: /* 17.1.23 */
/* SGSN number 18.4.22 M TLV 5-11 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_SGSN_NUMBER))
offset = dissect_bssap_sgsn_number(tvb, bssap_tree, offset);
/* Uplink Tunnel Payload Control and Info 18.4.25 M TLV 3-223 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_ULINK_TNL_PLD_CTR_AND_INF))
offset = dissect_bssap_ulink_tunnel_payload_control_and_info(tvb, pinfo, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_LOCATION_UPDATE_REQUEST: /* 17.1.11 BSSAP+-LOCATION-UPDATE-REQUEST */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* SGSN number SGSN number 18.4.22 M TLV 5-11 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_SGSN_NUMBER))
offset = dissect_bssap_sgsn_number(tvb, bssap_tree, offset);
/* Update type GPRS location update type 18.4.6 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_GPRS_LOC_UPD_TYPE))
offset = dissect_bssap_gprs_location_update_type(tvb, bssap_tree, offset);
/* New Cell global identity Cell global identity 18.4.1 M TLV 10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_CELL_GBL_ID))
offset = dissect_bssap_cell_global_id(tvb, bssap_tree, pinfo, offset);
/* Mobile station classmark Mobile station classmark 1 18.4.18 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_MOBILE_STN_CLS_MRK1))
offset = dissect_bssap_mobile_stn_cls_mrk1(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Old location area identifier Location area identifier 18.4.14 O TLV 7 */
if (check_optional_ie(tvb, offset, BSSAP_LOC_AREA_ID))
offset = dissect_bssap_loc_area_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* TMSI status TMSI status 18.4.24 O TLV 3 */
if (check_optional_ie(tvb, offset, BSSAP_TMSI_STATUS))
offset = dissect_bssap_tmsi_status(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* New service area identification Service area identification 18.4.21b O TLV 9 */
if (check_optional_ie(tvb, offset, BSSAP_SERVICE_AREA_ID))
offset = dissect_bssap_service_area_id(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* IMEISV IMEISV 18.4.9 O TLV 10 */
if (check_optional_ie(tvb, offset, BSSAP_IMEISV))
offset = dissect_bssap_imesiv(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_LOCATION_UPDATE_ACCEPT: /* 17.1.9 */
/* IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* Location area identifier Location area identifier 18.4.14 M TLV 7 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_LOC_AREA_ID))
offset = dissect_bssap_loc_area_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* New TMSI, or IMSI Mobile identity 18.4.17 O TLV 6-10 */
if (check_optional_ie(tvb, offset, BSSAP_MOBILE_ID))
offset = dissect_bssap_mobile_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_LOCATION_UPDATE_REJECT: /* 17.1.10 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* Reject cause Reject cause 18.4.21 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_REJECT_CAUSE))
offset = dissect_bssap_reject_cause(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_TMSI_REALLOCATION_COMPLETE: /* 17.1.22 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Cell global identity Cell global identity 18.4.1 O TLV 10 */
if (check_optional_ie(tvb, offset, BSSAP_CELL_GBL_ID))
offset = dissect_bssap_cell_global_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Service area identification Service area identification 18.4.21b O TLV 9 */
if (check_optional_ie(tvb, offset, BSSAP_SERVICE_AREA_ID))
offset = dissect_bssap_service_area_id(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_ALERT_REQUEST: /* 17.1.3 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_ALERT_ACK: /* 17.1.1 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_ALERT_REJECT: /* 17.1.2 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* Gs Cause Gs Cause 18.4.7 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_GS_CAUSE))
offset = dissect_bssap_Gs_cause(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_MS_ACTIVITY_INDICATION: /* 17.1.14 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Cell global identity Cell global identity 18.4.1 O TLV 10 */
if (check_optional_ie(tvb, offset, BSSAP_CELL_GBL_ID))
offset = dissect_bssap_cell_global_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Service area identification Service area identification 18.4.21b O TLV 9 */
if (check_optional_ie(tvb, offset, BSSAP_SERVICE_AREA_ID))
offset = dissect_bssap_service_area_id(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_GPRS_DETACH_INDICATION: /* 17.1.6 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* SGSN number SGSN number 18.4.22 M TLV 5-11 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_SGSN_NUMBER))
offset = dissect_bssap_sgsn_number(tvb, bssap_tree, offset);
/* IMSI detach from GPRS service type IMSI detach from GPRS service type 18.4.17 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI_DET_FROM_GPRS_SERV_TYPE))
offset = dissect_bssap_imsi_det_from_gprs_serv_type(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Cell global identity Cell global identity 18.4.1 O TLV 10 */
if (check_optional_ie(tvb, offset, BSSAP_CELL_GBL_ID))
offset = dissect_bssap_cell_global_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Service area identification Service area identification 18.4.21b O TLV 9 */
if (check_optional_ie(tvb, offset, BSSAP_SERVICE_AREA_ID))
offset = dissect_bssap_service_area_id(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_GPRS_DETACH_ACK: /* 17.1.5 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_IMSI_DETACH_INDICATION: /* 17.1.8 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* SGSN number SGSN number 18.4.22 M TLV 5-11 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_SGSN_NUMBER))
offset = dissect_bssap_sgsn_number(tvb, bssap_tree, offset);
/* Detach type IMSI detach from non-GPRS service type 18.4.11 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI_DET_FROM_NON_GPRS_SERV_TYPE))
offset = dissect_bssap_imsi_det_from_non_gprs_serv_type(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Cell global identity Cell global identity 18.4.1 O TLV 10 */
if (check_optional_ie(tvb, offset, BSSAP_CELL_GBL_ID))
offset = dissect_bssap_cell_global_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Location information age Location information age 18.4.14 O TLV 4 */
if (check_optional_ie(tvb, offset, BSSAP_LOC_INF_AGE))
offset = dissect_bssap_location_information_age(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Service area identification Service area identification 18.4.21b O TLV 9 */
if (check_optional_ie(tvb, offset, BSSAP_SERVICE_AREA_ID))
offset = dissect_bssap_service_area_id(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_IMSI_DETACH_ACK: /* 17.1.7 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_RESET_INDICATION: /* 17.1.21 */
/* Conditional IE:s */
/* SGSN number SGSN number 18.4.22 C TLV 5-11 */
if (check_optional_ie(tvb, offset, BSSAP_SGSN_NUMBER)) {
offset = dissect_bssap_sgsn_number(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
}else{
/* VLR number VLR number 18.4.26 C TLV 5-11 */
if (check_optional_ie(tvb, offset, BSSAP_VLR_NUMBER)) {
offset = dissect_bssap_vlr_number(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
}
}
proto_tree_add_item(tree, hf_bssap_conditional_ie, tvb, offset, -1, ENC_NA);
break;
case BSSAP_RESET_ACK: /* 17.1.20 */
/* Conditional IE:s */
/* SGSN number SGSN number 18.4.22 C TLV 5-11 */
if (check_optional_ie(tvb, offset, BSSAP_SGSN_NUMBER)) {
offset = dissect_bssap_sgsn_number(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
}else{
/* VLR number VLR number 18.4.26 C TLV 5-11 */
if (check_optional_ie(tvb, offset, BSSAP_VLR_NUMBER)) {
offset = dissect_bssap_vlr_number(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
}
}
proto_tree_add_item(tree, hf_bssap_conditional_ie, tvb, offset, -1, ENC_NA);
break;
case BSSAP_MS_INFORMATION_REQUEST: /* 17.1.15 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* Information requested Information requested 18.4.13 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_INFO_REQ))
offset = dissect_bssap_info_req(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_MS_INFORMATION_RESPONSE: /* 17.1.16 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* TMSI TMSI 18.4.23 O TLV 6 */
if (check_optional_ie(tvb, offset, BSSAP_TMSI))
offset = dissect_bssap_tmsi(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* PTMSI PTMSI 18.4.20 O TLV 6 BSSAP_PTMSI*/
if (check_optional_ie(tvb, offset, BSSAP_PTMSI))
offset = dissect_bssap_ptmsi(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* IMEI IMEI 18.4.8 O TLV 10 */
if (check_optional_ie(tvb, offset, BSSAP_IMEI))
offset = dissect_bssap_imei(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* IMEISV IMEISV 18.4.9 O TLV 10 BSSAP_IMEISV*/
if (check_optional_ie(tvb, offset, BSSAP_IMEISV))
offset = dissect_bssap_imesiv(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Cell global identity Cell global identity 18.4.1 O TLV 10 */
if (check_optional_ie(tvb, offset, BSSAP_CELL_GBL_ID))
offset = dissect_bssap_cell_global_id(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Location information age Location information age 18.4.15 O TLV 4 */
if (check_optional_ie(tvb, offset, BSSAP_LOC_INF_AGE))
offset = dissect_bssap_location_information_age(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Mobile station state Mobile station state 18.4.19 O TLV 3 */
if (check_optional_ie(tvb, offset, BSSAP_MOBILE_STN_STATE))
offset = dissect_bssap_mobile_station_state(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* Service area identification Service area identification 18.4.21b O TLV 9 */
if (check_optional_ie(tvb, offset, BSSAP_SERVICE_AREA_ID))
offset = dissect_bssap_service_area_id(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_MM_INFORMATION_REQUEST: /* 17.1.12 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
/* MM information MM information 18.4.16 O TLV 3-n */
if (check_optional_ie(tvb, offset, BSSAP_MM_INFORMATION))
offset = dissect_bssap_MM_information(tvb, bssap_tree, pinfo, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_MOBILE_STATUS: /* 17.1.13 */
/* IMSI IMSI 18.4.10 O TLV 6-10 */
if (check_optional_ie(tvb, offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* Gs Cause Gs Cause 18.4.7 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_GS_CAUSE))
offset = dissect_bssap_Gs_cause(tvb, bssap_tree, offset);
/* Erroneous message Erroneous message 18.4.5 M TLV 3-n BSSAP_ERRONEOUS_MSG*/
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_ERRONEOUS_MSG))
offset = dissect_bssap_gprs_erroneous_msg(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
case BSSAP_MS_UNREACHABLE: /* 17.1.17 */
/* IMSI IMSI 18.4.10 M TLV 6-10 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_IMSI))
offset = dissect_bssap_imsi(tvb, bssap_tree, pinfo, offset);
/* Gs Cause Gs Cause 18.4.7 M TLV 3 */
if (check_ie(tvb, pinfo, tree, &offset, BSSAP_GS_CAUSE))
offset = dissect_bssap_Gs_cause(tvb, bssap_tree, offset);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return tvb_reported_length(tvb);
proto_tree_add_item(tree, hf_bssap_extraneous_data, tvb, offset, -1, ENC_NA);
break;
default:
break;
}
return tvb_reported_length(tvb);
}
static gboolean
dissect_bssap_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
/* Is it a BSSAP/BSAP packet?
* If octet_1 == 0x00 and octet_2 == length(tvb) - 2
* or if octet_1 == 0x01 and octet_3 == length(tvb) - 3
* then we'll assume it is a bssap packet
* If octet_1 == 0x00 a further check is done
* to differentiate a BSSMAP BLOCK message from a
* RANAP DirectTransfer (under certain conditions)
*/
switch (tvb_get_guint8(tvb, 0))
{
case 0x00:
if (tvb_get_guint8(tvb, 1) != (tvb_reported_length(tvb) - 2)) {
return(FALSE);
}
if (tvb_get_guint8(tvb, 2) == 0x40 && tvb_get_guint8(tvb, 3) != 0x01) {
return(FALSE);
}
break;
case 0x01:
if (tvb_get_guint8(tvb, 2) != (tvb_reported_length(tvb) - 3)) {
return(FALSE);
}
break;
default:
return(FALSE);
}
dissect_bssap(tvb, pinfo, tree, data);
return(TRUE);
}
/* Register the protocol with Wireshark */
void
proto_register_bssap(void)
{
module_t *bssap_module;
expert_module_t* expert_bssap;
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_bssap_pdu_type,
{ "Message Type", "bssap.pdu_type",
FT_UINT8, BASE_HEX, VALS(bssap_pdu_type_values), 0x0,
NULL, HFILL}},
{ &hf_bsap_pdu_type,
{ "Message Type", "bsap.pdu_type",
FT_UINT8, BASE_HEX, VALS(bsap_pdu_type_values), 0x0,
NULL, HFILL}},
{ &hf_bssap_dlci_cc,
{ "Control Channel", "bssap.dlci.cc",
FT_UINT8, BASE_HEX, VALS(bssap_cc_values), CC_MASK,
NULL, HFILL}},
{ &hf_bsap_dlci_cc,
{ "Control Channel", "bsap.dlci.cc",
FT_UINT8, BASE_HEX, VALS(bsap_cc_values), CC_MASK,
NULL, HFILL}},
{ &hf_bssap_dlci_spare,
{ "Spare", "bssap.dlci.spare",
FT_UINT8, BASE_HEX, NULL, SPARE_MASK,
NULL, HFILL}},
{ &hf_bsap_dlci_rsvd,
{ "Reserved", "bsap.dlci.rsvd",
FT_UINT8, BASE_HEX, NULL, SPARE_MASK,
NULL, HFILL}},
{ &hf_bssap_dlci_sapi,
{ "SAPI", "bssap.dlci.sapi",
FT_UINT8, BASE_HEX, VALS(bssap_sapi_values), SAPI_MASK,
NULL, HFILL}},
{ &hf_bsap_dlci_sapi,
{ "SAPI", "bsap.dlci.sapi",
FT_UINT8, BASE_HEX, VALS(bsap_sapi_values), SAPI_MASK,
NULL, HFILL}},
{ &hf_bssap_length,
{ "Length", "bssap.length",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_plus_message_type,
{ "Message Type", "bssap_plus.msg_type",
FT_UINT8, BASE_DEC | BASE_EXT_STRING, &bssap_plus_message_type_values_ext, 0x0,
NULL, HFILL}},
{ &hf_bssap_plus_ie,
{ "IEI", "bssap_plus.iei",
FT_UINT8, BASE_DEC | BASE_EXT_STRING, &bssap_plus_ie_id_values_ext, 0x0,
NULL, HFILL}},
{ &hf_bssap_plus_ie_len,
{ "Length indicator", "bssap_plus.ie_len",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_extension,
{ "Extension", "bssap.extension",
FT_BOOLEAN, 8, TFS(&bssap_extension_value), 0x80,
NULL, HFILL }},
{ &hf_bssap_type_of_number,
{ "Type of number", "bssap.type_of_number",
FT_UINT8, BASE_HEX, VALS(gsm_a_dtap_type_of_number_values), 0x70,
NULL, HFILL }},
{ &hf_bssap_numbering_plan_id,
{ "Numbering plan identification", "bssap.number_plan",
FT_UINT8, BASE_HEX, VALS(gsm_a_dtap_numbering_plan_id_values), 0x0f,
NULL, HFILL }},
{ &hf_bssap_sgsn_number,
{ "SGSN number", "bssap.sgsn_number",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }},
#if 0
{ &hf_bssap_vlr_number,
{ "VLR number", "bssap.vlr_number",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }},
#endif
{ &hf_bssap_cell_global_id_ie,
{ "Cell global identity IE", "bssap.cell_global_id_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_channel_needed_ie,
{ "Channel needed IE", "bssap.channel_needed_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_dlink_tnl_pld_cntrl_amd_inf_ie,
{ "Downlink Tunnel Payload Control and Info IE", "bssap.dlink_tnl_pld_cntrl_amd_inf_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_ulink_tnl_pld_cntrl_amd_inf_ie,
{ "Uplink Tunnel Payload Control and Info IE", "bssap.ulink_tnl_pld_cntrl_amd_inf_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_emlpp_prio_ie,
{ "eMLPP Priority IE", "bssap.emlpp_prio_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_gprs_erroneous_msg_ie,
{ "Erroneous message IE", "bssap.erroneous_msg_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_gprs_loc_upd_type_ie,
{ "GPRS location update type IE", "bssap.loc_upd_type_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_Gs_cause_ie,
{ "Gs Cause IE", "bssap.Gs_cause_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_imei_ie,
{ "IMEI IE", "bssap.imei_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_imesiv_ie,
{ "IMEISV IE", "bssap.imesiv",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_imsi_ie,
{ "IMSI IE", "bssap.imsi_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_imsi_det_from_gprs_serv_type_ie,
{ "IMSI detach from GPRS service type IE", "bssap.msi_det_from_gprs_serv_type_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_imsi_det_from_non_gprs_serv_type_ie,
{ "IMSI detach from non-GPRS service IE", "bssap.msi_det_from_non_gprs_serv_type_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_info_req_ie,
{ "Information requested IE", "bssap.info_req_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_loc_area_id_ie,
{ "Location area identifier IE", "bssap.loc_area_id_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_loc_inf_age_ie,
{ "Location information age IE", "bssap.loc_inf_age_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_mm_information_ie,
{ "MM information IE", "bssap.mm_information",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_mobile_id_ie,
{ "Mobile identity IE", "bssap.mobile_id_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_mobile_stn_cls_mrk1_ie,
{ "Mobile station classmark 1 IE", "bssap.mobile_stn_cls_mrk1_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_mobile_station_state_ie,
{ "Mobile station state IE", "bssap.mobile_station_state_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_ptmsi_ie,
{ "PTMSI IE", "bssap.ptmsi_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_reject_cause_ie,
{ "Reject cause IE", "bssap.reject_cause_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_service_area_id_ie,
{ "Service area identification IE", "bssap.service_area_id_ie",
FT_NONE, BASE_NONE, NULL, 0,
"Mobile station classmark 1", HFILL }},
{ &hf_bssap_sgsn_nr_ie,
{ "SGSN number IE", "bssap.sgsn_nr_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_tmsi_ie,
{ "TMSI IE", "bssap.tmsi_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_tmsi_status_ie,
{ "TMSI status IE", "bssap.tmsi_status_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_vlr_number_ie,
{ "VLR number IE", "bssap.vlr_number_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_global_cn_id_ie,
{ "Global CN-Id IE", "bssap.global_cn_id_ie",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_plus_ie_data,
{ "IE Data", "bssap.ie_data",
FT_BYTES, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_call_priority,
{ "eMLPP Priority", "bssap.call_priority",
FT_UINT8, BASE_DEC, VALS(bssap_call_priority_values), 0x07,
NULL, HFILL}},
{ &hf_bssap_gprs_loc_upd_type,
{ "GPRS location update type", "bssap.gprs_loc_upd_type",
FT_UINT8, BASE_DEC, VALS(bssap_plus_GPRS_loc_upd_type_values), 0x0,
NULL, HFILL}},
{ &hf_bssap_Gs_cause,
{ "Gs cause", "bssap.Gs_cause",
FT_UINT8, BASE_DEC, VALS(bssap_Gs_cause_values), 0x0,
NULL, HFILL}},
{ &hf_bssap_imei,
{ "IMEI", "bssap.imei",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_imeisv,
{ "IMEISV", "bssap.imeisv",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_bssap_imsi_det_from_gprs_serv_type,
{ "IMSI detach from GPRS service type", "bssap.imsi_det_from_gprs_serv_type",
FT_UINT8, BASE_DEC, VALS(bssap_Gs_cause_values), 0x0,
NULL, HFILL}},
{ &hf_bssap_info_req,
{ "Information requested", "bssap.info_req",
FT_UINT8, BASE_DEC, VALS(bssap_info_req_values), 0x0,
NULL, HFILL}},
{ &hf_bssap_loc_inf_age,
{ "AgeOfLocationInformation in minutes", "bssap.loc_inf_age",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_mobile_station_state,
{ "Mobile station state", "bssap.mobile_station_state",
FT_UINT8, BASE_DEC, VALS(bssap_mobile_station_state_values), 0x0,
NULL, HFILL}},
{ &hf_bssap_ptmsi,
{ "PTMSI", "bssap.ptmsi",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_tmsi,
{ "TMSI", "bssap.tmsi",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_tmsi_status,
{ "TMSI status", "bssap.tmsi_status",
FT_BOOLEAN, 8, TFS(&bssap_tmsi_flag), 0x01,
NULL, HFILL }},
{ &hf_bssap_tom_prot_disc,
{ "TOM Protocol Discriminator", "bssap.Tom_prot_disc",
FT_UINT8, BASE_DEC, VALS(bssap_tom_prot_disc_values), 0x78,
NULL, HFILL}},
{ &hf_bssap_e_bit,
{ "E: Cipher Request", "bssap.e_bit",
FT_BOOLEAN, 8, TFS(&bssap_E_flag), 0x04,
NULL, HFILL }},
{ &hf_bssap_tunnel_prio,
{ "Tunnel Priority", "bssap.tunnel_prio",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_global_cn_id,
{ "Global CN-Id", "bssap.global_cn_id",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_plmn_id,
{ "PLMN-Id", "bssap.plmn_id",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_cn_id,
{ "CN-Id", "bssap.cn_id",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_cell_global_id,
{ "Cell global identity", "bssap.cell_global_id",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_extraneous_data,
{ "Extraneous data", "bssap.extraneous_data",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_bssap_conditional_ie,
{ "Conditional IE", "bssap.conditional_ie",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_bssap,
&ett_bssap_dlci,
&ett_bssap_imsi,
&ett_bssap_imsi_det_from_gprs_serv_type,
&ett_bssap_imsi_det_from_non_gprs_serv_type,
&ett_bssap_info_req,
&ett_bssap_loc_area_id,
&ett_bssap_loc_inf_age,
&ett_bssap_mm_information,
&ett_bssap_mobile_id,
&ett_bssap_sgsn_nr,
&ett_bssap_tmsi,
&ett_bssap_tmsi_status,
&ett_bssap_vlr_number,
&ett_bssap_global_cn,
&ett_bssap_gprs_loc_upd,
&ett_bassp_Gs_cause,
&ett_bassp_imei,
&ett_bassp_imesiv,
&ett_bssap_cell_global_id,
&ett_bssap_cgi,
&ett_bssap_channel_needed,
&ett_bssap_dlink_tnl_pld_cntrl_amd_inf,
&ett_bssap_ulink_tnl_pld_cntrl_amd_inf,
&ett_bssap_emlpp_prio,
&ett_bssap_erroneous_msg,
&ett_bssap_mobile_stn_cls_mrk1,
&ett_bssap_mobile_station_state,
&ett_bssap_ptmsi,
&ett_bssap_reject_cause,
&ett_bssap_service_area_id,
&ett_bssap_global_cn_id,
&ett_bssap_plmn,
};
static const enum_val_t gsm_or_lb_interface_options[] = {
{ "gsm a", "GSM A", GSM_INTERFACE },
{ "lb", "Lb", LB_INTERFACE },
{ NULL, NULL, 0 }
};
static const enum_val_t bssap_or_bsap_options[] = {
{ "bssap", "BSSAP", BSSAP },
{ "bsap", "BSAP", BSAP },
{ NULL, NULL, 0 }
};
static ei_register_info ei[] = {
{ &ei_bssap_unknown_message, { "bssap.unknown_message", PI_PROTOCOL, PI_WARN, "Unknown message", EXPFILL }},
{ &ei_bssap_unknown_parameter, { "bssap.unknown_parameter", PI_PROTOCOL, PI_WARN, "Unknown parameter", EXPFILL }},
{ &ei_bssap_mandatory_ie, { "bssap.mandatory_ie", PI_PROTOCOL, PI_WARN, "Mandatory IE expected", EXPFILL }},
};
/* Register the protocol name and description */
proto_bssap = proto_register_protocol("BSSAP/BSAP", "BSSAP", "bssap");
proto_bssap_plus = proto_register_protocol("BSSAP2", "BSSAP2", "bssap_plus");
register_dissector("bssap", dissect_bssap, proto_bssap);
register_dissector("bssap_plus", dissect_bssap_plus, proto_bssap_plus);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_bssap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_bssap = expert_register_protocol(proto_bssap);
expert_register_field_array(expert_bssap, ei, array_length(ei));
bssap_module = prefs_register_protocol(proto_bssap, proto_reg_handoff_bssap);
prefs_register_enum_preference(bssap_module,
"bsap_or_bssap",
"Identify to sub-dissector as",
"For the sake of sub-dissectors registering to accept data "
"from the BSSAP/BSAP dissector, this defines whether it is "
"identified as BSSAP or BSAP.",
&bssap_or_bsap_global,
bssap_or_bsap_options,
FALSE);
prefs_register_enum_preference(bssap_module,
"gsm_or_lb_interface",
"Identify the BSSAP interface",
"GSM-A is the interface between the BSC and the MSC. Lb is the interface between the BSC and the SMLC.",
&gsm_or_lb_interface_global,
gsm_or_lb_interface_options,
FALSE);
prefs_register_uint_preference(bssap_module, "ssn",
"Subsystem number used for BSSAP",
"Set Subsystem number used for BSSAP/BSSAP+",
10, &global_bssap_ssn);
bssap_dissector_table = register_dissector_table("bssap.pdu_type", "BSSAP Message Type", proto_bssap, FT_UINT8, BASE_DEC, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE);
bsap_dissector_table = register_dissector_table("bsap.pdu_type", "BSAP Message Type", proto_bssap, FT_UINT8, BASE_DEC, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE);
}
void
proto_reg_handoff_bssap(void)
{
static gboolean initialized = FALSE;
static dissector_handle_t bssap_plus_handle;
static guint old_bssap_ssn;
if (!initialized) {
heur_dissector_add("sccp", dissect_bssap_heur, "BSSAP over SCCP", "bssap_sccp", proto_bssap, HEURISTIC_ENABLE);
heur_dissector_add("sua", dissect_bssap_heur, "BSSAP over SUA", "bssap_sua", proto_bssap, HEURISTIC_ENABLE);
/* BSSAP+ */
bssap_plus_handle = create_dissector_handle(dissect_bssap_plus, proto_bssap);
rrlp_handle = find_dissector_add_dependency("rrlp", proto_bssap_plus);
gsm_bssmap_le_dissector_handle = find_dissector_add_dependency("gsm_bssmap_le", proto_bssap);
gsm_a_bssmap_dissector_handle = find_dissector_add_dependency("gsm_a_bssmap", proto_bssap);
initialized = TRUE;
} else {
dissector_delete_uint("sccp.ssn", old_bssap_ssn, bssap_plus_handle);
}
dissector_add_uint("sccp.ssn", global_bssap_ssn, bssap_plus_handle);
old_bssap_ssn = global_bssap_ssn;
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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