/* packet-gtpv2.c
 *
 * Routines for GTPv2 dissection
 * Copyright 2009 - 2011, Anders Broman <anders.broman [at] ericcsson.com>
 *
 * $Id: packet-gtpv2.c 35606 2011-01-21 09:24:43Z etxrab $
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Ref: 3GPP TS 29.274 version 8.1.1 Release 8 ETSI TS 129 274 V8.1.1 (2009-04)
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdlib.h>

#include <glib.h>

#include <epan/packet.h>
#include <epan/asn1.h>
#include <epan/expert.h>
#include <epan/sminmpec.h>

#include "packet-gsm_a_common.h"
#include "packet-gsm_map.h"
#include "packet-e164.h"
#include "packet-e212.h"
#include "packet-s1ap.h"
#include "packet-ranap.h"


static dissector_handle_t nas_eps_handle;

/*GTPv2 Message->GTP Header(SB)*/
static int proto_gtpv2 = -1;

static int hf_gtpv2_reserved = -1;
static int hf_gtpv2_spare_half_octet = -1;
static int hf_gtpv2_spare_bits = -1;
static int hf_gtpv2_flags = -1;
static int hf_gtpv2_version = -1;
static int hf_gtpv2_p = -1;
static int hf_gtpv2_t = -1;
static int hf_gtpv2_message_type = -1;
static int hf_gtpv2_msg_length = -1;
static int hf_gtpv2_teid = -1;
static int hf_gtpv2_seq = -1;
static int hf_gtpv2_spare = -1;


static int hf_gtpv2_ie = -1;
static int hf_gtpv2_ie_len = -1;
static int hf_gtpv2_cr = -1;
static int hf_gtpv2_instance = -1;
static int hf_gtpv2_cause = -1;
static int hf_gtpv2_cause_cs = -1;
static int hf_gtpv2_cause_bce = -1;
static int hf_gtpv2_cause_pce = -1;
static int hf_gtpv2_cause_off_ie_t = -1;
static int hf_gtpv2_rec = -1;
static int hf_gtpv2_apn = -1;
static int hf_gtpv2_ebi = -1;
static int hf_gtpv2_daf = -1;
static int hf_gtpv2_dtf = -1;
static int hf_gtpv2_hi = -1;
static int hf_gtpv2_dfi = -1;
static int hf_gtpv2_oi = -1;
static int hf_gtpv2_isrsi = -1;
static int hf_gtpv2_israi = -1;
static int hf_gtpv2_sgwci = -1;
static int hf_gtpv2_pt = -1;
static int hf_gtpv2_tdi = -1;
static int hf_gtpv2_si = -1;
static int hf_gtpv2_msv = -1;
static int hf_gtpv2_pdn_type = -1;
static int hf_gtpv2_pdn_ipv4 = -1;
static int hf_gtpv2_pdn_ipv6_len = -1;
static int hf_gtpv2_pdn_ipv6 = -1;
static int hf_gtpv2_pdn_numbers_nsapi = -1;
static int hf_gtpv2_p_tmsi = -1;
static int hf_gtpv2_p_tmsi_sig = -1;


static int hf_gtpv2_rat_type = -1;
static int hf_gtpv2_uli_ecgi_flg = -1;
static int hf_gtpv2_uli_lai_flg = -1;
static int hf_gtpv2_uli_tai_flg = -1;
static int hf_gtpv2_uli_rai_flg = -1;
static int hf_gtpv2_uli_sai_flg = -1;
static int hf_gtpv2_uli_cgi_flg = -1;
static int hf_gtpv2_cng_rep_act = -1;

static gint ett_gtpv2 = -1;
static gint ett_gtpv2_flags = -1;
static gint ett_gtpv2_ie = -1;
static gint ett_gtpv2_uli_flags = -1;
static gint ett_gtpv2_uli_field = -1;
static gint ett_gtpv2_bearer_ctx = -1;
static gint ett_gtpv2_PDN_conn = -1;
static gint ett_gtpv2_mm_context_flag = -1;
static gint ett_gtpv2_pdn_numbers_nsapi = -1;
static gint ett_gtpv2_tra_info_trigg = -1;
static gint ett_gtpv2_tra_info_trigg_msc_server = -1;
static gint ett_gtpv2_tra_info_trigg_mgw = -1;
static gint ett_gtpv2_tra_info_trigg_sgsn = -1;
static gint ett_gtpv2_tra_info_trigg_ggsn = -1;
static gint ett_gtpv2_tra_info_trigg_bm_sc = -1;
static gint ett_gtpv2_tra_info_trigg_sgw_mme = -1;
static gint ett_gtpv2_tra_info_interfaces = -1;
static gint ett_gtpv2_tra_info_interfaces_imsc_server = -1;
static gint ett_gtpv2_tra_info_interfaces_lmgw = -1;
static gint ett_gtpv2_tra_info_interfaces_lsgsn = -1;
static gint ett_gtpv2_tra_info_interfaces_lggsn = -1;
static gint ett_gtpv2_tra_info_interfaces_lrnc = -1;
static gint ett_gtpv2_tra_info_interfaces_lbm_sc = -1;
static gint ett_gtpv2_tra_info_interfaces_lmme = -1;
static gint ett_gtpv2_tra_info_interfaces_lsgw = -1;
static gint ett_gtpv2_tra_info_interfaces_lpdn_gw = -1;
static gint ett_gtpv2_tra_info_interfaces_lpdn_lenb = -1;

static int hf_gtpv2_selec_mode = -1;
static int hf_gtpv2_source_type = -1;
static int hf_gtpv2_f_teid_v4 = -1;
static int hf_gtpv2_f_teid_v6 = -1;
static int hf_gtpv2_f_teid_interface_type= -1;
static int hf_gtpv2_f_teid_gre_key= -1;
static int hf_gtpv2_f_teid_ipv4= -1;
static int hf_gtpv2_f_teid_ipv6= -1;
static int hf_gtpv2_tmsi = -1;
static int hf_gtpv2_hsgw_addr_f_len = -1;
static int hf_gtpv2_hsgw_addr_ipv4 = -1;
static int hf_gtpv2_hsgw_addr_ipv6 = -1;
static int hf_gtpv2_gre_key = -1;
static int hf_gtpv2_sgw_addr_ipv4 = -1;
static int hf_gtpv2_sgw_addr_ipv6 = -1;
static int hf_gtpv2_sgw_s1u_teid = -1;
static int hf_gtpv2_imsi= -1;
static int hf_gtpv2_ipv4_addr = -1;


static int hf_gtpv2_ambr_up= -1;
static int hf_gtpv2_ambr_down= -1;
static int hf_gtpv2_ip_address_ipv4= -1;
static int hf_gtpv2_ip_address_ipv6= -1;
static int hf_gtpv2_mei= -1;

/* Trace Information */
static int hf_gtpv2_tra_info = -1;
static int hf_gtpv2_tra_info_msc_momt_calls = -1;
static int hf_gtpv2_tra_info_msc_momt_sms = -1;
static int hf_gtpv2_tra_info_msc_lu_imsi_ad = -1;
static int hf_gtpv2_tra_info_msc_handovers = -1;
static int hf_gtpv2_tra_info_msc_ss = -1;
static int hf_gtpv2_tra_info_mgw_context = -1;
static int hf_gtpv2_tra_info_sgsn_pdp_context = -1;
static int hf_gtpv2_tra_info_sgsn_momt_sms = -1;
static int hf_gtpv2_tra_info_sgsn_rau_gprs_ad = -1;
static int hf_gtpv2_tra_info_sgsn_mbms = -1;
static int hf_gtpv2_tra_info_sgsn_reserved = -1;
static int hf_gtpv2_tra_info_ggsn_pdp = -1;
static int hf_gtpv2_tra_info_ggsn_mbms = -1;
static int hf_gtpv2_tra_info_bm_sc = -1;
static int hf_gtpv2_tra_info_mme_sgw_ss = -1;
static int hf_gtpv2_tra_info_mme_sgw_sr = -1;
static int hf_gtpv2_tra_info_mme_sgw_iataud = -1;
static int ett_gtpv2_tra_info_ne_types = -1;
static int hf_gtpv2_tra_info_lne_msc_s = -1;
static int hf_gtpv2_tra_info_lne_mgw = -1;
static int hf_gtpv2_tra_info_lne_sgsn = -1;
static int hf_gtpv2_tra_info_lne_ggsn = -1;
static int hf_gtpv2_tra_info_lne_rnc = -1;
static int hf_gtpv2_tra_info_lne_bm_sc = -1;
static int hf_gtpv2_tra_info_lne_mme = -1;
static int hf_gtpv2_tra_info_lne_sgw = -1;
static int hf_gtpv2_tra_info_lne_pdn_gw = -1;
static int hf_gtpv2_tra_info_lne_enb = -1;
static int hf_gtpv2_tra_info_tdl = -1;
static int hf_gtpv2_tra_info_lmsc_a = -1;
static int hf_gtpv2_tra_info_lmsc_lu = -1;
static int hf_gtpv2_tra_info_lmsc_mc = -1;
static int hf_gtpv2_tra_info_lmsc_map_g = -1;
static int hf_gtpv2_tra_info_lmsc_map_b = -1;
static int hf_gtpv2_tra_info_lmsc_map_e = -1;
static int hf_gtpv2_tra_info_lmsc_map_f = -1;
static int hf_gtpv2_tra_info_lmsc_cap = -1;
static int hf_gtpv2_tra_info_lmsc_map_d = -1;
static int hf_gtpv2_tra_info_lmsc_map_c = -1;
static int hf_gtpv2_tra_info_lmgw_mc = -1;
static int hf_gtpv2_tra_info_lmgw_nb_up = -1;
static int hf_gtpv2_tra_info_lmgw_lu_up = -1;
static int hf_gtpv2_tra_info_lsgsn_gb = -1;
static int hf_gtpv2_tra_info_lsgsn_lu = -1;
static int hf_gtpv2_tra_info_lsgsn_gn = -1;
static int hf_gtpv2_tra_info_lsgsn_map_gr = -1;
static int hf_gtpv2_tra_info_lsgsn_map_gd = -1;
static int hf_gtpv2_tra_info_lsgsn_map_gf = -1;
static int hf_gtpv2_tra_info_lsgsn_gs = -1;
static int hf_gtpv2_tra_info_lsgsn_ge = -1;
static int hf_gtpv2_tra_info_lggsn_gn = -1;
static int hf_gtpv2_tra_info_lggsn_gi = -1;
static int hf_gtpv2_tra_info_lggsn_gmb = -1;
static int hf_gtpv2_tra_info_lrnc_lu = -1;
static int hf_gtpv2_tra_info_lrnc_lur = -1;
static int hf_gtpv2_tra_info_lrnc_lub = -1;
static int hf_gtpv2_tra_info_lrnc_uu = -1;
static int hf_gtpv2_tra_info_lbm_sc_gmb = -1;
static int hf_gtpv2_tra_info_lmme_s1_mme = -1;
static int hf_gtpv2_tra_info_lmme_s3 = -1;
static int hf_gtpv2_tra_info_lmme_s6a = -1;
static int hf_gtpv2_tra_info_lmme_s10 = -1;
static int hf_gtpv2_tra_info_lmme_s11 = -1;
static int hf_gtpv2_tra_info_lsgw_s4 = -1;
static int hf_gtpv2_tra_info_lsgw_s5 = -1;
static int hf_gtpv2_tra_info_lsgw_s8b = -1;
static int hf_gtpv2_tra_info_lsgw_s11 = -1;
static int hf_gtpv2_tra_info_lpdn_gw_s2a = -1;
static int hf_gtpv2_tra_info_lpdn_gw_s2b = -1;
static int hf_gtpv2_tra_info_lpdn_gw_s2c = -1;
static int hf_gtpv2_tra_info_lpdn_gw_s5 = -1;
static int hf_gtpv2_tra_info_lpdn_gw_s6c = -1;
static int hf_gtpv2_tra_info_lpdn_gw_gx = -1;
static int hf_gtpv2_tra_info_lpdn_gw_s8b = -1;
static int hf_gtpv2_tra_info_lpdn_gw_sgi = -1;
static int hf_gtpv2_tra_info_lenb_s1_mme = -1;
static int hf_gtpv2_tra_info_lenb_x2 = -1;
static int hf_gtpv2_tra_info_lenb_uu = -1;

static int hf_gtpv2_address_digits = -1;
static int hf_gtpv2_ti = -1;

static int hf_gtpv2_bearer_qos_pvi= -1;
static int hf_gtpv2_bearer_qos_pl= -1;
static int hf_gtpv2_bearer_qos_pci= -1;
static int hf_gtpv2_bearer_qos_label_qci = -1;
static int hf_gtpv2_bearer_qos_mbr_up = -1;
static int hf_gtpv2_bearer_qos_mbr_down = -1;
static int hf_gtpv2_bearer_qos_gbr_up = -1;
static int hf_gtpv2_bearer_qos_gbr_down = -1;
static int hf_gtpv2_flow_qos_label_qci = -1;
static int hf_gtpv2_flow_qos_mbr_up = -1;
static int hf_gtpv2_flow_qos_mbr_down = -1;
static int hf_gtpv2_flow_qos_gbr_up = -1;
static int hf_gtpv2_flow_qos_gbr_down = -1;

static int hf_gtpv2_delay_value = -1;
static int hf_gtpv2_charging_id = -1;
static int hf_gtpv2_charging_characteristic = -1;
static int hf_gtpv2_bearer_flag_ppc = -1;
static int hf_gtpv2_bearer_flag_vb = -1;
static int hf_gtpv2_ue_time_zone_dst = -1;
static int hf_gtpv2_fq_csid_type = -1;
static int hf_gtpv2_fq_csid_nr = -1;
static int hf_gtpv2_fq_csid_ipv4 = -1;
static int hf_gtpv2_fq_csid_ipv6 = -1;
static int hf_gtpv2_fq_csid_id = -1;
static int hf_gtpv2_complete_req_msg_type = -1;
static int hf_gtpv2_mme_grp_id = -1;
static int hf_gtpv2_mme_code = -1;
static int hf_gtpv2_m_tmsi = -1;
static int hf_gtpv2_container_type = -1;
static int hf_gtpv2_cause_type = -1;
static int hf_gtpv2_CauseRadioNetwork = -1;
static int hf_gtpv2_CauseTransport = -1;
static int hf_gtpv2_CauseNas = -1;
static int hf_gtpv2_CauseProtocol = -1;
static int hf_gtpv2_CauseMisc = -1;
static int hf_gtpv2_target_type = -1;
static int hf_gtpv2_macro_enodeb_id = -1;

static int hf_gtpv2_node_type= -1;
static int hf_gtpv2_fqdn = -1;
static int hf_gtpv2_enterprise_id = -1;
static int hf_gtpv2_apn_rest= -1;
static int hf_gtpv2_pti= -1;
static int hf_gtpv2_mm_context_sm = -1;
static int hf_gtpv2_mm_context_nhi = -1;
static int hf_gtpv2_mm_context_drxi = -1;
static int hf_gtpv2_mm_context_cksn = -1;
static int hf_gtpv2_mm_context_cksn_ksi = -1;
static int hf_gtpv2_mm_context_ksi_a= -1;
static int hf_gtpv2_mm_context_ksi = -1;
static int hf_gtpv2_mm_context_nr_tri = -1;
static int hf_gtpv2_mm_context_nr_qui = -1;
static int hf_gtpv2_mm_context_nr_qua = -1;
static int hf_gtpv2_mm_context_unipa = -1;
static int hf_gtpv2_mm_context_unc = -1;
static int hf_gtpv2_mm_context_nas_dl_cnt = -1;
static int hf_gtpv2_mm_context_nas_ul_cnt = -1;

static int hf_gtpv2_uli_cgi_lac= -1;
static int hf_gtpv2_uli_cgi_ci= -1;
static int hf_gtpv2_uli_sai_lac= -1;
static int hf_gtpv2_uli_sai_sac= -1;
static int hf_gtpv2_uli_rai_lac= -1;
static int hf_gtpv2_uli_rai_rac= -1;
static int hf_gtpv2_uli_tai_tac= -1;
static int hf_gtpv2_uli_ecgi_eci= -1;
static int hf_gtpv2_uli_lai_lac = -1;
static int hf_gtpv2_uli_ecgi_eci_spare= -1;
static int hf_gtpv2_nsapi = -1;
static int hf_gtpv2_bearer_control_mode= -1;

/* Definition of User Location Info (AVP 22) masks */
#define GTPv2_ULI_CGI_MASK			0x01
#define GTPv2_ULI_SAI_MASK			0x02
#define GTPv2_ULI_RAI_MASK			0x04
#define GTPv2_ULI_TAI_MASK			0x08
#define GTPv2_ULI_ECGI_MASK			0x10
#define GTPv2_ULI_LAI_MASK			0x20

#define GTPV2_CREATE_SESSION_REQUEST     32
#define GTPV2_CREATE_SESSION_RESPONSE    33
#define GTPV2_FORWARD_RELOCATION_REQ	133
#define GTPV2_FORWARD_CTX_NOTIFICATION	137
static void dissect_gtpv2_ie_common(tvbuff_t * tvb, packet_info * pinfo _U_, proto_tree * tree, gint offset, guint8 message_type);

/*Message Types for GTPv2 (Refer Pg19 29.274) (SB)*/
static const value_string gtpv2_message_type_vals[] = {
    {0, "Reserved"},
    {1, "Echo Request"},
    {2, "Echo Response"},
    {3, "Version Not Supported Indication"},
    /* 4-24 Reserved for S101 interface TS 29.276 */
    /* 25-31 Reserved for Sv interface TS 29.280 */
    /* SGSN/MME to PGW (S4/S11, S5/S8) */
    {32, "Create Session Request"},
    {33, "Create Session Response"},
    {34, "Modify Bearer Request"},
    {35, "Modify Bearer Response"},
    {36, "Delete Session Request"},
    {37, "Delete Session Response"},
    /* SGSN to PGW (S4, S5/S8) */
    {38, "Change Notification Request"},
    {39, "Change Notification Response"},
    /* 40-63 For future use */
    /* Messages without explicit response */
    {64, "Modify Bearer Command"},                          /* (MME/SGSN to PGW -S11/S4, S5/S8) */
    {65, "Modify Bearer Failure Indication"},               /*(PGW to MME/SGSN -S5/S8, S11/S4) */
    {66, "Delete Bearer Command"},                          /* (MME to PGW -S11, S5/S8) */
    {67, "Delete Bearer Failure Indication"},               /* (PGW to MME -S5/S8, S11) */
    {68, "Bearer Resource Command"},                        /* (MME/SGSN to PGW -S11/S4, S5/S8) */
    {69, "Bearer Resource Failure Indication"},             /* (PGW to MME/SGSN -S5/S8, S11/S4) */
    {70, "Downlink Data Notification Failure Indication"},  /*(SGSN/MME to SGW -S4/S11) */
    {71, "Trace Session Activation"},
    {72, "Trace Session Deactivation"},
    {73, "Stop Paging Indication"},
    /* 74-94 For future use */
    /* PDN-GW to SGSN/MME (S5/S8, S4/S11) */
    {95, "Create Bearer Request"},
    {96, "Create Bearer Response"},
    {97, "Update Bearer Request"},
    {98, "Update Bearer Response"},
    {99, "Delete Bearer Request"},
    {100, "Delete Bearer Response"},
    /* PGW to MME, MME to PGW, SGW to PGW, SGW to MME (S5/S8, S11) */
    {101, "Delete PDN Connection Set Request"},
    {102, "Delete PDN Connection Set Response"},
    /* 103-127 For future use */
    /* MME to MME, SGSN to MME, MME to SGSN, SGSN to SGSN (S3/10/S16) */
    {128, "Identification Request"},
    {129, "Identification Response"},
    {130, "Context Request"},
    {131, "Context Response"},
    {132, "Context Acknowledge"},
    {133, "Forward Relocation Request"},
    {134, "Forward Relocation Response"},
    {135, "Forward Relocation Complete Notification"},
    {136, "Forward Relocation Complete Acknowledge"},
    {137, "Forward Access Context Notification"},
    {138, "Forward Access Context Acknowledge"},
    {139, "Relocation Cancel Request"},
    {140, "Relocation Cancel Response"},
    {141, "Configuration Transfer Tunnel"},
    /* 142-148 For future use */
    /* SGSN to MME, MME to SGSN (S3)*/
    {149, "Detach Notification"},
    {150, "Detach Acknowledge"},
    {151, "CS Paging Indication"},
    {152, "RAN Information Relay"},
    {153, "Alert MME Notification"},
    {154, "Alert MME Acknowledge"},
    {155, "UE Activity Notification"},
    {156, "UE Activity Acknowledge"},
    /* 157 to 159 For future use */
    /* MME to SGW (S11) */
    {160, "Create Forwarding Tunnel Request"},
    {161, "Create Forwarding Tunnel Response"},
    {162, "Suspend Notification"},
    {163, "Suspend Acknowledge"},
    {164, "Resume Notification"},
    {165, "Resume Acknowledge"},
    {166, "Create Indirect Data Forwarding Tunnel Request"},
    {167, "Create Indirect Data Forwarding Tunnel Response"},
    {168, "Delete Indirect Data Forwarding Tunnel Request"},
    {169, "Delete Indirect Data Forwarding Tunnel Response"},
    {170, "Release Access Bearers Request"},
    {171, "Release Access Bearers Response"},
    /* 172-175 For future use */
    /* SGW to SGSN/MME (S4/S11) */
    {176, "Downlink Data Notification"},
    {177, "Downlink Data Notification Acknowledgement"},
    /* SGW to SGSN (S4) */
    {178, "Update Bearer Complete"},
    /* 179-191 For future use */
    /* Other */
    {200, "Update PDN Connection Set Request"},
    {201, "Update PDN Connection Set Response"},
	/* 202 to 230 For future use */
	/* MBMS GW to MME/SGSN (Sm/Sn) */
    {231, "MBMS Session Start Request"},
    {323, "MBMS Session Start Response"},
    {233, "MBMS Session Update Request"},
    {234, "MBMS Session Update Response"},
    {235, "MBMS Session Stop Request"},
    {236, "MBMS Session Stop Response"},
	/* 237 to 239 For future use */
/* 240-255 Reserved for GTP-U TS 29.281 [13] */
    {0, NULL}
};

#define GTPV2_IE_RESERVED        0
#define GTPV2_IE_IMSI            1
#define GTPV2_IE_CAUSE           2
#define GTPV2_REC_REST_CNT       3
#define GTPV2_APN               71
#define GTPV2_AMBR              72
#define GTPV2_EBI               73
#define GTPV2_IP_ADDRESS        74
#define GTPV2_MEI               75
#define GTPV2_IE_MSISDN         76
#define GTPV2_INDICATION        77
#define GTPV2_PCO               78
#define GTPV2_PAA               79
#define GTPV2_BEARER_QOS        80
#define GTPV2_IE_FLOW_QOS       81
#define GTPV2_IE_RAT_TYPE       82
#define GTPV2_IE_SERV_NET       83
#define GTPV2_IE_BEARER_TFT     84
#define GTPV2_IE_TAD            85
#define GTPV2_IE_ULI            86
#define GTPV2_IE_F_TEID         87
#define GTPV2_IE_TMSI           88
#define GTPV2_IE_GLOBAL_CNID    89
#define GTPV2_IE_S103PDF                 90
#define GTPV2_IE_S1UDF                   91
#define GTPV2_IE_DEL_VAL                 92
#define GTPV2_IE_BEARER_CTX              93
#define GTPV2_IE_CHAR_ID                 94
#define GTPV2_IE_CHAR_CHAR               95
#define GTPV2_IE_TRA_INFO		         96
#define GTPV2_BEARER_FLAG                97
/* define GTPV2_IE_PAGING_CAUSE          98 (void) */
#define GTPV2_IE_PDN_TYPE                99
#define GTPV2_IE_PTI                    100
#define GTPV2_IE_DRX_PARAM              101
#define GTPV2_IE_UE_NET_CAPABILITY      102
#define GTPV2_IE_MM_CONTEXT_GSM_T       103
#define GTPV2_IE_MM_CONTEXT_UTMS_CQ     104
#define GTPV2_IE_MM_CONTEXT_GSM_CQ      105
#define GTPV2_IE_MM_CONTEXT_UTMS_Q      106
#define GTPV2_IE_MM_CONTEXT_EPS_QQ      107
#define GTPV2_IE_MM_CONTEXT_UTMS_QQ     108
#define GTPV2_IE_PDN_CONNECTION         109
#define GTPV2_IE_PDN_NUMBERS            110
#define GTPV2_IE_P_TMSI                 111
#define GTPV2_IE_P_TMSI_SIG             112
#define GTPV2_IE_HOP_COUNTER            113
#define GTPV2_IE_UE_TIME_ZONE           114
#define GTPV2_IE_TRACE_REFERENCE        115
#define GTPV2_IE_COMPLETE_REQUEST_MSG   116
#define GTPV2_IE_GUTI                   117
#define GTPV2_IE_F_CONTAINER	        118
#define GTPV2_IE_F_CAUSE                119
#define GTPV2_IE_SEL_PLMN_ID            120
#define GTPV2_IE_TARGET_ID              121
/* GTPV2_IE_NSAPI                       122 */
#define GTPV2_IE_PKT_FLOW_ID            123
#define GTPV2_IE_RAB_CONTEXT            124
#define GTPV2_IE_S_RNC_PDCP_CTX_INFO    125
#define GTPV2_IE_UDP_S_PORT_NR          126
#define GTPV2_IE_APN_RESTRICTION        127
#define GTPV2_IE_SEL_MODE               128
#define GTPV2_IE_SOURCE_IDENT           129
#define GTPV2_IE_BEARER_CONTROL_MODE    130
#define GTPV2_IE_CNG_REP_ACT            131
#define GTPV2_IE_FQ_CSID                132
#define GTPV2_IE_CHANNEL_NEEDED         133
#define GTPV2_IE_EMLPP_PRI              134
#define GTPV2_IE_NODE_TYPE              135
#define GTPV2_IE_FQDN                   136
#define GTPV2_IE_TI                     137
#define GTPV2_IE_PRIVATE_EXT            255

#define SPARE                               0X0
#define CREATE_NEW_TFT                      0X20
#define DELETE_TFT                          0X40
#define ADD_PACKET_FILTERS_TFT              0X60
#define REPLACE_PACKET_FILTERS_TFT          0X80
#define DELETE_PACKET_FILTERS_TFT           0XA0
#define NO_TFT_OPERATION                    0XC0
#define RESERVED                            0XE0


/* Table 8.1-1: Information Element types for GTPv2 */
static const value_string gtpv2_element_type_vals[] = {
    {0, "Reserved"},
    {1, "International Mobile Subscriber Identity (IMSI)"},                     /* Variable Length / 8.3 */
    {2, "Cause"},                                                               /* Variable Length / 8.4 */
    {3, "Recovery (Restart Counter)"},                                          /* Variable Length / 8.5 */
    /* 4-50 Reserved for S101 interface Extendable / See 3GPP TS 29.276 [14] */
    /* 51-70 Reserved for Sv interface Extendable / See 3GPP TS 29.280 [15] */
    {71, "Access Point Name (APN)"},                                            /* Variable Length / 8.6 */
    {72, "Aggregate Maximum Bit Rate (AMBR)"},                                  /* Fixed Length / 8.7 */
    {73, "EPS Bearer ID (EBI)"},                                                /* Extendable / 8.8 */
    {74, "IP Address"},                                                         /* Extendable / 8.9 */
    {75, "Mobile Equipment Identity (MEI)"},                                    /* Variable Length / 8.10 */
    {76, "MSISDN"},                                                             /* Variable Length / 8.11 */
    {77, "Indication"},                                                         /* Extendable / 8.12 */
    {78, "Protocol Configuration Options (PCO)"},                               /* Variable Length / 8.13 */
    {79, "PDN Address Allocation (PAA)"},                                       /* Variable Length / 8.14 */
    {80, "Bearer Level Quality of Service (Bearer QoS)"},                       /* Variable Length / 8.15 */
    {81, "Flow Quality of Service (Flow QoS)"},                                 /* Extendable / 8.16 */
    {82, "RAT Type"},                                                           /* Extendable / 8.17 */
    {83, "Serving Network"},                                                    /* Extendable / 8.18 */
    {84, "EPS Bearer Level Traffic Flow Template (Bearer TFT)"},                /* Variable Length / 8.19 */
    {85, "Traffic Aggregation Description (TAD)"},                              /* Variable Length / 8.20 */
    {86, "User Location Info (ULI)"},                                           /* Variable Length / 8.21 */
    {87, "Fully Qualified Tunnel Endpoint Identifier (F-TEID)"},                /* Extendable / 8.22 */
    {88, "TMSI"},                                                               /* Variable Length / 8.23 */
    {89, "Global CN-Id"},                                                       /* Variable Length / 8.24 */
    {90, "S103 PDN Data Forwarding Info (S103PDF)"},                            /* Variable Length / 8.25 */
    {91, "S1-U Data Forwarding Info (S1UDF)"},                                  /* Variable Length/ 8.26 */
    {92, "Delay Value"},                                                        /* Extendable / 8.27 */
    {93, "Bearer Context"},                                                     /* Extendable / 8.28 */
    {94, "Charging ID"},                                                        /* Extendable / 8.29 */
    {95, "Charging Characteristics"},                                           /* Extendable / 8.30 */
    {96, "Trace Information"},                                                  /* Extendable / 8.31 */
    {97, "Bearer Flags"},                                                       /* Extendable / 8.32 */
    {98, "Paging Cause"},                                                       /* Variable Length / 8.33 */
    {99, "PDN Type"},                                                           /* Extendable / 8.34 */
    {100, "Procedure Transaction ID"},                                          /* Extendable / 8.35 */
    {101, "DRX Parameter"},                                                     /* Variable Length/ 8.36 */
    {102, "UE Network Capability"},                                             /* Variable Length / 8.37 */
    {103, "MM Context (GSM Key and Triplets)"},                                 /* Variable Length / 8.38 */
    {104, "MM Context (UMTS Key, Used Cipher and Quintuplets)"},                /* Variable Length / 8.38 */
    {105, "MM Context (GSM Key, Used Cipher and Quintuplets)"},                 /* Variable Length / 8.38 */
    {106, "MM Context (UMTS Key and Quintuplets)"},                             /* Variable Length / 8.38 */
    {107, "MM Context (EPS Security Context, Quadruplets and Quintuplets)"},    /* Variable Length / 8.38 */
    {108, "MM Context (UMTS Key, Quadruplets and Quintuplets)"},                /* Variable Length / 8.38 */
    {109, "PDN Connection"},                                                    /* Extendable / 8.39 */
    {110, "PDU Numbers"},                                                       /* Extendable / 8.40 */
    {111, "P-TMSI"},                                                            /* Variable Length / 8.41 */
    {112, "P-TMSI Signature"},                                                  /* Variable Length / 8.42 */
    {113, "Hop Counter"},                                                       /* Extendable / 8.43 */
    {114, "UE Time Zone"},                                                      /* Variable Length / 8.44 */
    {115, "Trace Reference"},                                                   /* Fixed Length / 8.45 */
    {116, "Complete Request Message"},                                          /* Variable Length / 8.46 */
    {117, "GUTI"},                                                              /* Variable Length / 8.47 */
    {118, "F-Container"},                                                       /* Variable Length / 8.48 */
    {119, "F-Cause"},                                                           /* Variable Length / 8.49 */
    {120, "Selected PLMN ID"},                                                  /* Variable Length / 8.50 */
    {121, "Target Identification"},                                             /* Variable Length / 8.51 */
    {122, "NSAPI"},                                                             /* Extendable / 8.52 */
    {123, "Packet Flow ID"},                                                    /* Variable Length / 8.53 */
    {124, "RAB Context"},                                                       /* Fixed Length / 8.54 */
    {125, "Source RNC PDCP Context Info"},                                      /* Variable Length / 8.55 */
    {126, "UDP Source Port Number"},                                            /* Extendable / 8.56 */
    {127, "APN Restriction"},                                                   /* Extendable / 8.57 */
    {128, "Selection Mode"},                                                    /* Extendable / 8.58 */
    {129, "Source Identification"},                                             /* Variable Length / 8.50 */
    {130, "Bearer Control Mode"},                                               /* Extendable / 8.60 */
    {131, "Change Reporting Action"},                                           /* Variable Length / 8.61 */
    {132, "Fully Qualified PDN Connection Set Identifier (FQ-CSID)"},           /* Variable Length / 8.62 */
    {133, "Channel needed"},                                                    /* Extendable / 8.63 */
    {134, "eMLPP Priority"},                                                    /* Extendable / 8.64 */
    {135, "Node Type"},                                                         /* Extendable / 8.65 */
    {136, "Fully Qualified Domain Name (FQDN)"},                                /* Variable Length / 8.66 */
    {137, "Transaction Identifier (TI)"},                                       /* Variable Length / 8.68 */
    {138, "MBMS Session"},														/* Duration Extendable / 8.69 */
    {139, "MBMS Service Area"},													/* Extendable / 8.70 */
    {140, "MBMS Session Identifier"},											/* Extendable / 8.71 */
    {141, "MBMS Flow Identifier"},												/* Extendable / 8.72 */
    {142, "MBMS IP Multicast Distribution"},									/* Extendable / 8.73 */
    {143, "MBMS Distribution Acknowledge"},										/* Extendable / 8.74 */
    {144, "RFSP Index"},														/* Fixed Length / 8.77 */
    {145, "User CSG Information (UCI)"},										/* Extendable / 8.75 */
    {146, "CSG Information Reporting Action"},									/* Extendable / 8.76 */
    {147, "CSG ID"},															/* Extendable / 8.78 */
    {148, "CSG Membership Indication (CMI)"},									/* Extendable / 8.79 */
    {149, "Service indicator"},									                /* Fixed Length / 8.80 */
    {150, "Detach Type"},									                    /* Fixed Length / 8.81 */
    {151, "Local Distiguished Name (LDN)"},									    /* Variable / 8.82 */
    {152, "Node Features"},                                                     /* Extendable / 8.83 */
    {153, "MBMS Time to Data Transfer"},                                        /* Extendable / 8.84 */
    {154, "Throttling"},                                                        /* Extendable / 8.85 */
    {155, "Allocation/Retention Priority (ARP)"},                               /* Extendable / 8.86 */
    /* 156 to 254 Spare. For future use.  */                                    /* For future use. FFS */
    {255, "Private"},                                                           /* Extension Extendable / 8.67 */
    {0, NULL}
};

/* Code to dissect IE's */

static void
dissect_gtpv2_unknown(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
   proto_item *expert_item;

   expert_item = proto_tree_add_text(tree, tvb, 0, length, "IE data not dissected yet");
   expert_add_info_format(pinfo, expert_item, PI_PROTOCOL, PI_NOTE, "IE data not dissected yet");
   PROTO_ITEM_SET_GENERATED(expert_item);

}

/*
 * 8.3 International Mobile Subscriber Identity (IMSI)
 *
 * IMSI is defined in 3GPP TS 23.003
 * Editor's note: IMSI coding will be defined in 3GPP TS 24.301
 * Editor's note: In the first release of GTPv2 spec (TS 29.274v8.0.0) n = 8.
 * That is, the overall length of the IE is 11 octets.
 */

static void
dissect_gtpv2_imsi(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset= 0;
    const gchar *imsi_str;

    /* Fetch the BCD encoded digits from tvb low half byte, formating the digits according to
     * a default digit set of 0-9 returning "?" for overdecadic digits a pointer to the EP
     * allocated string will be returned.
     */
    imsi_str = tvb_bcd_dig_to_ep_str( tvb, offset, length, NULL, FALSE);

    proto_tree_add_string(tree, hf_gtpv2_imsi, tvb, offset, length, imsi_str);
    proto_item_append_text(item, "%s", imsi_str);

}

/*
 * 8.4 Cause
 */

/* Table 8.4-1: Cause values */
static const value_string gtpv2_cause_vals[] = {
    {0, "Reserved"},
    /* Request */
    {1, "Paging Cause"},
    {2, "Local Detach"},
    {3, "Complete Detach"},
    {4, "RAT changed from 3GPP to Non-3GPP"},
    {5, "ISR is activated"},
    {6, "Error Indication received from RNC/eNodeB"},
    {7, "IMSI Detach Only"},
    {8, "Reactivation Requested"},
    {9, "PDN reconnection to this APN disallowed"},
    {10, "Access changed from Non-3GPP to 3GPP"},
    /* 11-15 Spare. This value range is reserved for Cause values in a request message */
    {11, "Spare"},
    {12, "Spare"},
    {13, "Spare"},
    {14, "Spare"},
    {15, "Spare"},
    /* Acceptance Response */
    {16, "Request accepted"},
    {17, "Request accepted partially"},
    {18, "New PDN type due to network preference"},
    {19, "New PDN type due to single address bearer only"},
    /* 20-63 Spare. This value range is reserved for Cause values in acceptance response message */
    /* Rejection Response */
    {20, "Spare"},
    {21, "Spare"},
    {22, "Spare"},
    {23, "Spare"},
    {24, "Spare"},
    {25, "Spare"},
    {26, "Spare"},
    {27, "Spare"},
    {28, "Spare"},
    {29, "Spare"},
    {30, "Spare"},
    {31, "Spare"},
    {32, "Spare"},
    {33, "Spare"},
    {34, "Spare"},
    {35, "Spare"},
    {36, "Spare"},
    {37, "Spare"},
    {38, "Spare"},
    {39, "Spare"},
    {40, "Spare"},
    {41, "Spare"},
    {42, "Spare"},
    {43, "Spare"},
    {44, "Spare"},
    {45, "Spare"},
    {46, "Spare"},
    {47, "Spare"},
    {48, "Spare"},
    {49, "Spare"},
    {50, "Spare"},
    {51, "Spare"},
    {52, "Spare"},
    {53, "Spare"},
    {54, "Spare"},
    {55, "Spare"},
    {56, "Spare"},
    {57, "Spare"},
    {58, "Spare"},
    {59, "Spare"},
    {60, "Spare"},
    {61, "Spare"},
    {62, "Spare"},
    {63, "Spare"},

    {64, "Context Not Found"},
    {65, "Invalid Message Format"},
    {66, "Version not supported by next peer"},
    {67, "Invalid length"},
    {68, "Service not supported"},
    {69, "Mandatory IE incorrect"},
    {70, "Mandatory IE missing"},
    {71, "Optional IE incorrect"},
    {72, "System failure"},
    {73, "No resources available"},
    {74, "Semantic error in the TFT operation"},
    {75, "Syntactic error in the TFT operation"},
    {76, "Semantic errors in packet filter(s)"},
    {77, "Syntactic errors in packet filter(s)"},
    {78, "Missing or unknown APN"},
    {79, "Unexpected repeated IE"},
    {80, "GRE key not found"},
    {81, "Reallocation failure"},
    {82, "Denied in RAT"},
    {83, "Preferred PDN type not supported"},
    {84, "All dynamic addresses are occupied"},
    {85, "UE context without TFT already activated"},
    {86, "Protocol type not supported"},
    {87, "UE not responding"},
    {88, "UE refuses"},
    {89, "Service denied"},
    {90, "Unable to page UE"},
    {91, "No memory available"},
    {92, "User authentication failed"},
    {93, "APN access denied - no subscription"},
    {94, "Request rejected"},
    {95, "P-TMSI Signature mismatch"},
    {96, "IMSI not known"},
    {97, "Semantic error in the TAD operation"},
    {98, "Syntactic error in the TAD operation"},
    {99, "Reserved Message Value Received"},
    {100, "PGW not responding"},
    {101, "Collision with network initiated request"},
    {102, "Unable to page UE due to Suspension"},
    {103, "Conditional IE missing"},
    {104, "APN Restriction type Incompatible with currently active PDN connection"},
    {105, "Invalid overall length of the triggered response message and a piggybacked initial message"},
    {106, "Data forwarding not supported"},
    {107, "Invalid reply from remote peer"},
    {108, "Fallback to GTPv1"},
    {109, "Invalid peer"},
    {110, "Temporarily rejected due to handover procedure in progress"},
    {111, "Modifications not limited to S1-U bearers"},
    {112, "Request rejected for a PMIPv6 reason "},
    /* 113-239 Spare. For future use in a triggered/response message  */
    /* 240-255 Spare. For future use in an initial/request message */
    {0, NULL}
};

static value_string_ext gtpv2_cause_vals_ext = VALUE_STRING_EXT_INIT(gtpv2_cause_vals);

/* Table 8.4-1: CS (Cause Source) */
static const true_false_string gtpv2_cause_cs = {
	"Originated by remote node",
	"Originated by node sending the message",
};

static void
dissect_gtpv2_cause(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int     offset = 0;
    guint8  tmp;

    /* Cause value octet 5 */
    tmp = tvb_get_guint8(tvb, offset);
    proto_tree_add_item(tree, hf_gtpv2_cause, tvb, offset, 1, FALSE);

    /* Add Cause to ie_tree */
    proto_item_append_text(item, "%s (%u)", val_to_str_ext_const(tmp, &gtpv2_cause_vals_ext, "Unknown"),tmp);
    offset++;

    /* Octet 6 Spare PCE BCE CS */
    proto_tree_add_bits_item(tree, hf_gtpv2_spare_bits, tvb, offset<<3, 5, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_cause_pce, tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_cause_bce, tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_cause_cs, tvb, offset, 1, FALSE);
    offset++;

	/* If n = 2, a = 0 and the Cause IE shall be 6 octets long.
	* Therefore, octets "a(n+1) to a(n+4)" will not be present.
	* If n = 6, a = 1 and the Cause IE will be 10 octets long.
	*/
    if ( length == 2 ){
        return;
	}
	/*
	 * If the rejection is due to a mandatory IE or a verifiable conditional IE is faulty
	 * or missing, the offending IE shall be included within an additional field "a(n+1)
	 * to a(n+4)". Only Type and Instance fields of the offending IE that caused the
	 * rejection have a meaning. The length in the Octet 8-9 and spare bits in the Octet 10
	 * shall be set to "0". In this case, the value of "n" shall be "6".
	 * Otherwise, the value of "n" is equal to "2".
	 */

    /* Type of the offending IE */
	proto_tree_add_item(tree, hf_gtpv2_cause_off_ie_t, tvb, offset, 1, FALSE);
    offset++;

    /* Length */
    proto_tree_add_item(tree, hf_gtpv2_ie_len, tvb, offset, 2, FALSE);
    offset+=2;
    /* a(n+4) Spare Instance */
	proto_tree_add_bits_item(tree, hf_gtpv2_spare_half_octet, tvb, offset>>3, 4, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_instance, tvb, offset, 1, FALSE);
    offset++;

}

/*
 * 8.5 Recovery (Restart Counter)
 */
static void
dissect_gtpv2_recovery(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int     offset = 0;
	guint8  recovery;

	recovery = tvb_get_guint8(tvb, offset);
    proto_tree_add_item(tree, hf_gtpv2_rec, tvb, offset, 1, FALSE);
	proto_item_append_text(item, "%u", recovery);

}

/*
 * 8.6 Access Point Name (APN)
 * The encoding the APN field follows 3GPP TS 23.003 [2] subclause 9.1.
 * The content of the APN field shall be the full APN with both the APN Network Identifier
 * and APN Operator Identifier being present as specified in 3GPP TS 23.003 [2]
 * subclauses 9.1.1 and 9.1.2, 3GPP TS 23.060 [35] Annex A and 3GPP TS 23.401 [3] subclauses 4.3.8.1.
 */
static void
dissect_gtpv2_apn(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;
    guint8 *apn = NULL;
    int name_len, tmp;

    if (length > 0) {
        name_len = tvb_get_guint8(tvb, offset);

        if (name_len < 0x20) {
            apn = tvb_get_ephemeral_string(tvb, offset + 1, length - 1);
            for (;;) {
                if (name_len >= length - 1)
                break;
                tmp = name_len;
                name_len = name_len + apn[tmp] + 1;
                apn[tmp] = '.';
            }
        } else{
            apn = tvb_get_ephemeral_string(tvb, offset, length);
        }
        proto_tree_add_string(tree, hf_gtpv2_apn, tvb, offset, length, apn);
    }

    proto_item_append_text(item, "%s", apn);

}

/*
 * 8.7 Aggregate Maximum Bit Rate (AMBR)
 */

static void
dissect_gtpv2_ambr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;

    proto_tree_add_item(tree, hf_gtpv2_ambr_up, tvb, offset, 4, FALSE);
    offset= offset + 4;
    proto_tree_add_item(tree, hf_gtpv2_ambr_down, tvb, offset, 4, FALSE);
}

/*
 * 8.8 EPS Bearer ID (EBI)
 */
static void
dissect_gtpv2_ebi(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{

    int offset = 0;
	guint8       ebi;

    /* Spare (all bits set to 0) B8 - B5*/
	proto_tree_add_bits_item(tree, hf_gtpv2_spare_bits, tvb, offset, 4, FALSE);
    /* EPS Bearer ID (EBI) B4 - B1 */
	ebi = tvb_get_guint8(tvb, offset);
    proto_tree_add_item(tree, hf_gtpv2_ebi, tvb, offset, 1, FALSE);
	proto_item_append_text(item, "%u", ebi);

}
/*
 * 8.9 IP Address
 */
static void
dissect_gtpv2_ip_address(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;
	struct e_in6_addr ipv6_addr;

    if (length==4)
    {
        proto_tree_add_item(tree, hf_gtpv2_ip_address_ipv4, tvb, offset, length, FALSE);
		proto_item_append_text(item, "IPv4 %s", tvb_ip_to_str(tvb, offset));
    }
    else if (length==16)
    {
        proto_tree_add_item(tree, hf_gtpv2_ip_address_ipv6, tvb, offset, length, FALSE);
		tvb_get_ipv6(tvb, offset, &ipv6_addr);
		proto_item_append_text(item, "IPv6 %s", ip6_to_str(&ipv6_addr));
    }
}
/*
 * 8.10 Mobile Equipment Identity (MEI)
 * The ME Identity field contains either the IMEI or the IMEISV
 * as defined in clause 6.2 of 3GPP TS 23.003 [2]. It is encoded
 * as specified in clause 7.7.53 of 3GPP TS 29.060 [4], beginning
 * with octet 4 of Figure 7.7.53.1. The IMEI(SV) digits are encoded
 * using BCD coding where IMEI is 15 BCD digits and IMEISV is 16 BCD
 * digits. For IMEI, bits 5 to 8 of the last octet shall be filled
 * with an end mark coded as '1111'.
 */

static void
dissect_gtpv2_mei(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset= 0;
    const gchar *mei_str;

    /* Fetch the BCD encoded digits from tvb low half byte, formating the digits according to
     * a default digit set of 0-9 returning "?" for overdecadic digits a pointer to the EP
     * allocated string will be returned.
     */
    mei_str = tvb_bcd_dig_to_ep_str( tvb, 0, length, NULL, FALSE);

    proto_tree_add_string(tree, hf_gtpv2_mei, tvb, offset, length, mei_str);
	proto_item_append_text(item, "%s", mei_str);
}

/*
 * 8.11 MSISDN
 *
 * MSISDN is defined in 3GPP TS 23.003
 * Editor's note: MSISDN coding will be defined in TS 24.301.
 */
static void
dissect_gtpv2_msisdn(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    const char     *digit_str;

	/* Octets 5 to (n+4) represent the MSISDN value is in international number format
	 * as described in ITU-T Rec E.164 [25] and 3GPP TS 29.002 [41].
	 * MSISDN value contains only the actual MSISDN number (does not contain the "nature of
	 * address indicator" octet, which indicates "international number"
	 * as in 3GPP TS 29.002 [41]) and is encoded as TBCD digits, i.e.
	 * digits from 0 through 9 are encoded "0000" to "1001".
	 * When there is an odd number of digits, bits 8 to 5 of the last octet are encoded with
	 * the filler "1111".
	 */
    dissect_e164_cc(tvb, tree, 0, TRUE);
    /* Fetch the BCD encoded digits from tvb low half byte, formating the digits according to
     * a default digit set of 0-9 returning "?" for overdecadic digits a pointer to the EP
     * allocated string will be returned.
     */
    digit_str = tvb_bcd_dig_to_ep_str( tvb, 0, length, NULL, FALSE);

    proto_tree_add_string(tree, hf_gtpv2_address_digits, tvb, 0, length, digit_str);
	proto_item_append_text(item, "%s", digit_str);
}

/*
 * 8.12 Indication
 */
static void
dissect_gtpv2_ind(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;
    proto_tree_add_item(tree, hf_gtpv2_daf,         tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_dtf,         tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_hi,          tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_dfi,         tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_oi,          tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_isrsi,       tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_israi,       tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_sgwci,       tvb, offset, 1, FALSE);
    if(length==1)
    {
        proto_tree_add_text(tree, tvb, 0, length, "Older version?, should be 2 octets in 8.0.0");
        return;
    }
    offset++;
    proto_tree_add_item(tree, hf_gtpv2_pt,          tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_tdi,         tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_si,          tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_msv,         tvb, offset, 1, FALSE);
}

/*
 * 8.13 Protocol Configuration Options (PCO)
 * Protocol Configuration Options (PCO) is transferred via GTP tunnels. The sending entity copies the value part of the
 * PCO into the Value field of the PCO IE. The detailed coding of the PCO field from octets 5 to (n+4) shall be specified
 * as per clause 10.5.6.3 of 3GPP TS 24.008 [5], starting with octet 3.
 * Dissected in packet-gsm_a_gm.c
 */
static void
dissect_gtpv2_pco(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    /* pinfo needed */
    gsm_a_dtap_pinfo = pinfo;
	switch(message_type){
		case GTPV2_CREATE_SESSION_REQUEST:
			/* PCO options as MS to network direction */
			gsm_a_dtap_pinfo->link_dir = P2P_DIR_UL;
			break;
		case GTPV2_CREATE_SESSION_RESPONSE:
			/* PCO options as Network to MS direction: */
			gsm_a_dtap_pinfo->link_dir = P2P_DIR_DL;
			break;
		default:
			break;
	}
    de_sm_pco(tvb, tree, 0, length, NULL, 0);
	/* Restore previous values */
	gsm_a_dtap_pinfo = pinfo;
}

/*
 * 8.14 PDN Address Allocation (PAA)
 */

static const value_string gtpv2_pdn_type_vals[] = {
    {1, "IPv4"},
    {2, "IPv6"},
    {3, "IPv4/IPv6"},
    {0, NULL}
};

static void
dissect_gtpv2_paa(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;
    guint8 pdn_type;
    pdn_type  = tvb_get_guint8(tvb, offset);
    proto_tree_add_item(tree, hf_gtpv2_pdn_type, tvb, offset, 1, FALSE);
    offset++;
    switch(pdn_type)
    {
    case 1:
        /* IPv4 */
        proto_tree_add_item(tree, hf_gtpv2_pdn_ipv4, tvb, offset, 4, FALSE);
        offset+=4;
        break;
    case 2:
        /* IPv6*/
		/* If PDN type value indicates IPv6, octet 6 contains the IPv6 Prefix Length.
		 * Octets 7 through 22 contain an IPv6 Prefix and Interface Identifier.
		 * Bit 8 of octet 7 represents the most significant bit of the IPv6 Prefix
		 * and Interface Identifier and bit 1 of octet 22 the least significant bit.
		 */
        proto_tree_add_item(tree, hf_gtpv2_pdn_ipv6_len, tvb, offset, 1, FALSE);
        offset++;
        proto_tree_add_item(tree, hf_gtpv2_pdn_ipv6, tvb, offset, 16, FALSE);
        offset+=16;
        break;
    case 3:
        /* IPv4/IPv6 */
		/* If PDN type value indicates IPv4v6, octet 6 contains the IPv6 Prefix Length.
		 * Octets 7 through 22 contain an IPv6 Prefix and Interface Identifier.
		 * Bit 8 of octet 7 represents the most significant bit of the IPv6 Prefix
		 * and Interface Identifier and bit 1 of octet 22 the least significant bit.
		 * Octets 23 through 26 contain an IPv4 address. Bit 8 of octet 23 represents
		 * the most significant bit of the IPv4 address and bit 1 of octet 26 the least
		 * significant bit.
		 */
        proto_tree_add_item(tree, hf_gtpv2_pdn_ipv6_len, tvb, offset, 1, FALSE);
        offset++;
        proto_tree_add_item(tree, hf_gtpv2_pdn_ipv6, tvb, offset, 16, FALSE);
        offset+=16;
        proto_tree_add_item(tree, hf_gtpv2_pdn_ipv4, tvb, offset, 4, FALSE);
        offset+=4;
        break;
    default:
        break;
    }
}
/*
 * 8.15 Bearer Quality of Service (Bearer QoS)
 */

static void
dissect_gtpv2_bearer_qos(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_pvi, tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_pl, tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_pci, tvb, offset, 1, FALSE);
    offset++;
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_label_qci, tvb, offset, 1, FALSE);
    offset++;
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_mbr_up, tvb, offset, 5, FALSE);
    offset= offset+5;
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_mbr_down, tvb, offset, 5, FALSE);
    offset= offset+5;
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_gbr_up, tvb, offset, 5, FALSE);
    offset= offset+5;
    proto_tree_add_item(tree, hf_gtpv2_bearer_qos_gbr_down, tvb, offset, 5, FALSE);
    offset= offset+5;
}

/*
 * 8.16 Flow Quality of Service (Flow QoS)
 */

static void
dissect_gtpv2_flow_qos(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;
    proto_tree_add_item(tree, hf_gtpv2_flow_qos_label_qci, tvb, offset, 1, FALSE);
    offset++;
    proto_tree_add_item(tree, hf_gtpv2_flow_qos_mbr_up, tvb, offset, 5, FALSE);
    offset= offset+5;
    proto_tree_add_item(tree, hf_gtpv2_flow_qos_mbr_down, tvb, offset, 5, FALSE);
    offset= offset+5;
    proto_tree_add_item(tree, hf_gtpv2_flow_qos_gbr_up, tvb, offset, 5, FALSE);
    offset= offset+5;
    proto_tree_add_item(tree, hf_gtpv2_flow_qos_gbr_down, tvb, offset, 5, FALSE);
    offset= offset+5;
}

/*
 * 8.17 RAT Type
 */
static const value_string gtpv2_rat_type_vals[] = {
    {0, "Reserved"},
    {1, "UTRAN"},
    {2, "GERAN"},
    {3, "WLAN"},
    {4, "GAN"},
    {5, "HSPA Evolution"},
    {6, "EUTRAN"},
    {7, "Virtual"},
    {0, NULL}
};

static value_string_ext gtpv2_rat_type_vals_ext = VALUE_STRING_EXT_INIT(gtpv2_rat_type_vals);


static void
dissect_gtpv2_rat_type(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    guint8     rat_type;

	rat_type = tvb_get_guint8(tvb, 0);
    proto_tree_add_item(tree, hf_gtpv2_rat_type, tvb, 0, 1, FALSE);
    proto_item_append_text(tree, "%s (%u)", val_to_str_ext_const(rat_type, &gtpv2_rat_type_vals_ext, "Unknown"),rat_type);

}

/*
 * 8.18 Serving Network
 */
static void
dissect_gtpv2_serv_net(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    gchar		*mcc_mnc_str;

    mcc_mnc_str = dissect_e212_mcc_mnc_ep_str(tvb, pinfo, tree, 0, TRUE);
	proto_item_append_text(tree,"%s", mcc_mnc_str);
}

/*
 * 8.19 EPS Bearer Level Traffic Flow Template (Bearer TFT)
 */

static void
dissect_gtpv2_bearer_tft(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	/* The detailed coding of Traffic Aggregate
	 * Description is specified in 3GPP TS 24.008 [5] ,
	 * clause 10.5.6.12, beginning with octet 3..
	 * Use the decoding in packet-gsm_a_gm.c
	 */
	de_sm_tflow_temp(tvb, tree, 0, length, NULL, 0);

}
 /* 8.20 Traffic Aggregate Description (TAD)
 */
static void
dissect_gtpv2_tad(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	/* The detailed coding of Traffic Aggregate
	 * Description is specified in 3GPP TS 24.008 [5] ,
	 * clause 10.5.6.12, beginning with octet 3..
	 * Use the decoding in packet-gsm_a_gm.c
	 */
	de_sm_tflow_temp(tvb, tree, 0, length, NULL, 0);
}

/*
 * 8.21 User Location Info (ULI)
 *
 * The flags ECGI, TAI, RAI, SAI and CGI in octed 5 indicate if the corresponding
 * fields are present in the IE or not. If one of these flags is set to "0",
 * the corresponding field is not present at all. The respective identities are defined in 3GPP
 * TS 23.003 [2].
 * Editor's Note: The definition of ECGI is missing in 3GPP TS 23.003 v8.1.0.
 * It can be found in 3GPP TS 36.413 v8.3.0, but it is expected that it will be moved
 * to 23.003 in a future version.
 */

static void
decode_gtpv2_uli(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 instance _U_, guint flags)
{
    int offset = 1;
    proto_item	*fi;
	proto_tree	*part_tree;

    /* 8.21.1 CGI field  */
    if (flags & GTPv2_ULI_CGI_MASK)
    {
        proto_item_append_text(item, "CGI ");
		fi = proto_tree_add_text(tree, tvb, offset + 1, 7, "Cell Global Identity (CGI)");
		part_tree = proto_item_add_subtree(fi, ett_gtpv2_uli_field);
        dissect_e212_mcc_mnc(tvb, pinfo, part_tree, offset, TRUE);
        offset+=3;
        proto_tree_add_item(part_tree, hf_gtpv2_uli_cgi_lac, tvb, offset, 2, FALSE);
        proto_tree_add_item(part_tree, hf_gtpv2_uli_cgi_ci, tvb, offset, 2, FALSE);
        offset+=4;
        if(offset==length)
            return;
    }

    /* 8.21.2 SAI field  */
    if (flags & GTPv2_ULI_SAI_MASK)
    {
        proto_item_append_text(item, "SAI ");
        fi = proto_tree_add_text(tree, tvb, offset + 1, 7, "Service Area Identity (SAI)");
        part_tree = proto_item_add_subtree(fi, ett_gtpv2_uli_field);
        dissect_e212_mcc_mnc(tvb, pinfo, part_tree, offset, TRUE);
        offset+=3;
        proto_tree_add_item(part_tree, hf_gtpv2_uli_sai_lac, tvb, offset, 2, FALSE);
        proto_tree_add_item(part_tree, hf_gtpv2_uli_sai_sac, tvb, offset, 2, FALSE);
        offset+=4;
        if(offset==length)
            return;
    }
    /* 8.21.3 RAI field  */
    if (flags & GTPv2_ULI_RAI_MASK)
    {
        proto_item_append_text(item, "RAI ");
        fi = proto_tree_add_text(tree, tvb, offset + 1, 7, "Routeing Area Identity (RAI)");
        part_tree = proto_item_add_subtree(fi, ett_gtpv2_uli_field);
        dissect_e212_mcc_mnc(tvb, pinfo, part_tree, offset, TRUE);
        offset+=3;
        proto_tree_add_item(part_tree, hf_gtpv2_uli_rai_lac, tvb, offset, 2, FALSE);
        proto_tree_add_item(part_tree, hf_gtpv2_uli_rai_rac, tvb, offset, 2, FALSE);
        offset+=4;
        if(offset==length)
            return;
    }
    /* 8.21.4 TAI field  */
    if (flags & GTPv2_ULI_TAI_MASK)
    {
        proto_item_append_text(item, "TAI ");
        fi = proto_tree_add_text(tree, tvb, offset + 1, 7, "Tracking Area Identity (TAI)");
        part_tree = proto_item_add_subtree(fi, ett_gtpv2_uli_field);
        dissect_e212_mcc_mnc(tvb, pinfo, part_tree, offset, TRUE);
        offset+=3;
        proto_tree_add_item(part_tree, hf_gtpv2_uli_tai_tac, tvb, offset, 2, FALSE);
        offset+=2;
        if(offset==length)
            return;
    }
    /* 8.21.5 ECGI field */
    if (flags & GTPv2_ULI_ECGI_MASK)
    {
        guint8 octet;
        guint32 octet4;
        guint8 spare;
        guint32 ECGI;

        proto_item_append_text(item, "ECGI ");
        fi = proto_tree_add_text(tree, tvb, offset + 1, 7, "E-UTRAN Cell Global Identifier (ECGI)");
        part_tree = proto_item_add_subtree(fi, ett_gtpv2_uli_field);
        dissect_e212_mcc_mnc(tvb, pinfo, part_tree, offset, TRUE);
        offset+=3;
        /* The bits 8 through 5, of octet e+3 (Fig 8.21.5-1 in TS 29.274 V8.2.0) are spare
         * and hence they would not make any difference to the hex string following it,
		 * thus we directly read 4 bytes from the tvb
		 */

        octet = tvb_get_guint8(tvb,offset);
        spare = octet & 0xF0;
        octet4 = tvb_get_ntohl(tvb,offset);
        ECGI = octet4 & 0x0FFFFFFF;
        proto_tree_add_uint(part_tree, hf_gtpv2_uli_ecgi_eci_spare, tvb, offset, 1, spare);
		/* The coding of the E-UTRAN cell identifier is the responsibility of each administration.
		 * Coding using full hexadecimal representation shall be used.
		 */
        proto_tree_add_uint(part_tree, hf_gtpv2_uli_ecgi_eci, tvb, offset, 4, ECGI);
        /*proto_tree_add_item(tree, hf_gtpv2_uli_ecgi_eci, tvb, offset, 4, FALSE);*/
        offset+=4;
        if(offset==length)
            return;

    }
	/* 8.21.6	LAI field */
    if (flags & GTPv2_ULI_LAI_MASK)
    {
        proto_item_append_text(item, "LAI ");
        fi = proto_tree_add_text(tree, tvb, offset + 1, 5, "LAI (Location Area Identifier)");
        part_tree = proto_item_add_subtree(fi, ett_gtpv2_uli_field);
        dissect_e212_mcc_mnc(tvb, pinfo, part_tree, offset, TRUE);
        offset+=3;

		/* The Location Area Code (LAC) consists of 2 octets. Bit 8 of Octet f+3 is the most significant bit
		 * and bit 1 of Octet f+4 the least significant bit. The coding of the location area code is the
		 * responsibility of each administration. Coding using full hexadecimal representation shall be used.
		 */
		proto_tree_add_item(part_tree, hf_gtpv2_uli_lai_lac, tvb, offset, 2, FALSE);
		offset+=2;

	}

}

static void
dissect_gtpv2_uli(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	proto_item	*flags_item;
	proto_tree	*flag_tree;
    int offset = 0;
    guint flags;

    flags_item = proto_tree_add_text(tree, tvb, offset, 1, "Flags");
    flag_tree = proto_item_add_subtree(flags_item, ett_gtpv2_uli_flags);
    flags = tvb_get_guint8(tvb,offset)&0x3f;
	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits,	tvb, offset>>3, 2, FALSE);

	/* LAI B6 */
    proto_tree_add_item(flag_tree, hf_gtpv2_uli_lai_flg, tvb, offset, 1, FALSE);
	/* ECGI B5 */
    proto_tree_add_item(flag_tree, hf_gtpv2_uli_ecgi_flg, tvb, offset, 1, FALSE);
    /* TAI B4  */
    proto_tree_add_item(flag_tree, hf_gtpv2_uli_tai_flg, tvb, offset, 1, FALSE);
    /* RAI B3  */
    proto_tree_add_item(flag_tree, hf_gtpv2_uli_rai_flg, tvb, offset, 1, FALSE);
    /* SAI B2  */
    proto_tree_add_item(flag_tree, hf_gtpv2_uli_sai_flg, tvb, offset, 1, FALSE);
    /* CGI B1  */
    proto_tree_add_item(flag_tree, hf_gtpv2_uli_cgi_flg, tvb, offset, 1, FALSE);

    decode_gtpv2_uli(tvb, pinfo, tree, item, length, instance, flags);

    return;
}

/* Diameter 3GPP AVP Code: 22 3GPP-User-Location-Info */
/*
 * TS 29.061 v9.2.0
 * 16.4.7.2 Coding 3GPP Vendor-Specific RADIUS attributes
 *
 * For P-GW, the Geographic Location Type values and coding are defined as follows:
 *
 * 0			CGI
 * 1			SAI
 * 2			RAI
 * 3-127		Spare for future use
 * 128		TAI
 * 129		ECGI
 * 130		TAI and ECGI
 * 131-255	Spare for future use
 */

static int
dissect_diameter_3gpp_uli(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_)
{
    int offset = 0;
    guint length;
    guint flags;
    guint flags_3gpp;
    length = tvb_length(tvb);
    flags_3gpp = tvb_get_guint8(tvb,offset);

    switch(flags_3gpp)
    {
    case 128:
        /* TAI */
        flags = GTPv2_ULI_TAI_MASK;
        break;
    case 129:
        /* ECGI */
        flags = GTPv2_ULI_ECGI_MASK;
        break;
    case 130:
        /* TAI and ECGI */
        flags = GTPv2_ULI_TAI_MASK + GTPv2_ULI_ECGI_MASK;
        break;
    default:
        flags = flags_3gpp;
        break;
    }

    decode_gtpv2_uli(tvb, pinfo, tree, NULL, length, 0, flags);
    return length;
}

/*
 * 8.22 Fully Qualified TEID (F-TEID)
 */
static const value_string gtpv2_f_teid_interface_type_vals[] = {
    {0, "S1-U eNodeB GTP-U interface"},
    {1, "S1-U SGW GTP-U interface"},
    {2, "S12 RNC GTP-U interface"},
    {3, "S12 SGW GTP-U interface"},
    {4, "S5/S8 SGW GTP-U interface"},
    {5, "S5/S8 PGW GTP-U interface"},
    {6, "S5/S8 SGW GTP-C interface"},
    {7, "S5/S8 PGW GTP-C interface"},
    {8, "S5/S8 SGW PMIPv6 interface"},/* (the 32 bit GRE key is encoded in 32 bit TEID field "
        "and since alternate CoA is not used the control plane and user plane addresses are the same for PMIPv6)"}, */
    {9, "S5/S8 PGW PMIPv6 interface"},/* (the 32 bit GRE key is encoded in 32 bit TEID field "
        "and the control plane and user plane addresses are the same for PMIPv6)"}, */
    {10, "S11 MME GTP-C interface"},
    {11, "S11/S4 SGW GTP-C interface"},
    {12, "S10 MME GTP-C interface"},
    {13, "S3 MME GTP-C interface"},
    {14, "S3 SGSN GTP-C interface"},
    {15, "S4 SGSN GTP-U interface"},
    {16, "S4 SGW GTP-U interface"},
    {17, "S4 SGSN GTP-C interface"},
    {18, "S16 SGSN GTP-C interface"},
    {19, "eNodeB GTP-U interface for DL data forwarding"},
    {20, "eNodeB GTP-U interface for UL data forwarding"},
    {21, "RNC GTP-U interface for data forwarding"},
    {22, "SGSN GTP-U interface for data forwarding"},
    {23, "SGW GTP-U interface for data forwarding"},
    {24, "Sm MBMS GW GTP-C interface"},
    {25, "Sn MBMS GW GTP-C interface"},
    {26, "Sm MME GTP-C interface"},
    {27, "Sn SGSN GTP-C interface"},
    {28, "SGW GTP-U interface for UL data forwarding"},
    {29, "Sn SGSN GTP-U interface"},
    {30, "S2b ePDG GTP-C interface"},
    {31, "S2b-U ePDG GTP-U interface"},
    {32, "S2b PGW GTP-C interface"},
    {33, "S2b-U PGW GTP-U interface"},
    {0, NULL}
};
static value_string_ext gtpv2_f_teid_interface_type_vals_ext = VALUE_STRING_EXT_INIT(gtpv2_f_teid_interface_type_vals);

static const true_false_string gtpv2_f_teid_v4_vals = {
	"IPv4 address present",
	"IPv4 address not present",
};

static const true_false_string gtpv2_f_teid_v6_vals = {
	"IPv6 address present",
	"IPv6 address not present",
};

static void
dissect_gtpv2_f_teid(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;
    guint8       flags;

    flags = tvb_get_guint8(tvb, offset);
    proto_tree_add_item(tree, hf_gtpv2_f_teid_v4, tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_f_teid_v6, tvb, offset, 1, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_f_teid_interface_type, tvb, offset, 1, FALSE);

    offset++;
    proto_tree_add_item(tree, hf_gtpv2_f_teid_gre_key, tvb, offset, 4, FALSE);
    proto_item_append_text(tree, "%s, TEID/GRE Key: 0x%s", val_to_str_ext_const((flags & 0x1f), &gtpv2_f_teid_interface_type_vals_ext, "Unknown"),
        tvb_bytes_to_str(tvb, offset, 4));

    offset= offset+4;
    if (flags&0x80)
    {
        proto_tree_add_item(tree, hf_gtpv2_f_teid_ipv4, tvb, offset, 4, FALSE);
	proto_item_append_text(item, ", IPv4 %s", tvb_ip_to_str(tvb, offset));
        offset= offset+4;
    }
    if (flags&0x40)
    {
	proto_tree_add_item(tree, hf_gtpv2_f_teid_ipv6, tvb, offset, 16, FALSE);
	proto_item_append_text(item, ", IPv6 %s", tvb_ip6_to_str(tvb, offset));
        offset= offset+16;
    }
}
/*
 * 8.23 TMSI
 */
static void
dissect_gtpv2_tmsi(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{
	proto_tree_add_item(tree, hf_gtpv2_tmsi, tvb, 0, 4, FALSE);
	proto_tree_add_text(item, tvb, 0, length, "TMSI: %s", tvb_bytes_to_str(tvb, 0, 4));
}
/*
 * 8.24 Global CN-Id
 * (TS 23.003)
 * 12.3 CN Identifier
 *
 * A CN node is uniquely identified within a PLMN by its CN Identifier (CN-Id). The CN-Id together with the PLMN
 * identifier globally identifies the CN node. The CN-Id together with the PLMN-Id is used as the CN node identifier in
 * RANAP signalling over the Iu interface.
 * Global CN-Id = PLMN-Id || CN-Id
 * The CN-Id is defined by the operator, and set in the nodes via O&M.
 * For the syntax description and the use of this identifier in RANAP signalling, see 3GPP TS 25.413 [17].
 */

static void
dissect_gtpv2_g_cn_id(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	int		offset = 0;

	dissect_e212_mcc_mnc(tvb, pinfo, tree, 0, TRUE);
	offset +=3;

	/* >CN-ID M INTEGER (0..4095) */
	proto_tree_add_text(tree, tvb, offset, 2, "CN-Id: %s",
		tvb_bytes_to_str(tvb, offset, 2));
}
/*
 * 8.25 S103 PDN Data Forwarding Info (S103PDF)
 */
static void
dissect_gtpv2_s103pdf(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    proto_item *expert_item;
    int offset = 0;
    guint8       m,k,i;

	/* The HSGW Address and GRE Key identify a GRE Tunnel towards a HSGW over S103 interface for a specific PDN
     * connection of the UE. The EPS Bearer IDs specify the EPS Bearers which require data forwarding that belonging to this
     * PDN connection. The number of EPS bearer Ids included is specified by the value of EPS Bearer ID Number.
     */
	/* Octet 5 HSGW Address for forwarding Length = m */
	m = tvb_get_guint8(tvb, offset);
	proto_tree_add_item(tree, hf_gtpv2_hsgw_addr_f_len, tvb, offset, 1, FALSE);
	offset++;

	/* 6 to (m+5) HSGW Address for forwarding [4..16] */
	switch(m){
		case 4:
			/* IPv4 */
			proto_tree_add_item(tree, hf_gtpv2_hsgw_addr_ipv4, tvb, offset, 1, FALSE);
			offset+=4;
			break;
		case 16:
			/* IPv6 */
			proto_tree_add_item(tree, hf_gtpv2_hsgw_addr_ipv6, tvb, offset, 1, FALSE);
			offset+=16;
			break;
		default:
			/* Error */

            expert_item = proto_tree_add_text(tree, tvb, 0, length, "Wrong length %u, should be 4 or 16",m);
            expert_add_info_format(pinfo, expert_item, PI_PROTOCOL, PI_ERROR, "Wrong length %u, should be 4 or 16",m);
            PROTO_ITEM_SET_GENERATED(expert_item);
			return;
	}

	/* (m+6)- to (m+9) GRE Key */
    proto_tree_add_item(tree, hf_gtpv2_gre_key, tvb, offset, 4, FALSE);
	offset+=4;

	/* (m+10) EPS Bearer ID Number = k */
	k = tvb_get_guint8(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 1, "EPS Bearer ID Number = %d", k);
	offset += 1;

	/* (m+11) to (m+10+k)
	 * Spare EPS Bearer ID
	 */
	for ( i = 0; i < k; i++ ){
		proto_tree_add_bits_item(tree, hf_gtpv2_spare_bits, tvb, offset<<3, 4, FALSE);
		proto_tree_add_item(tree, hf_gtpv2_ebi, tvb, offset, 1, FALSE);
		offset++;
	}


}
/*
 * 8.26 S1-U Data Forwarding (S1UDF)
 */
static void
dissect_gtpv2_s1udf(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{
    proto_item *expert_item;
    int offset = 0;
    guint8       m;

	/* 5 Spare EPS Bearer ID */
	proto_tree_add_bits_item(tree, hf_gtpv2_spare_bits, tvb, offset<<3, 4, FALSE);
	proto_tree_add_item(tree, hf_gtpv2_ebi, tvb, offset, 1, FALSE);
	offset++;
	/* 6 Serving GW Address Length = m */
	m = tvb_get_guint8(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 1, "Serving GW Address Length = %u", m);
	offset++;
	/* 7 to (m+6) Serving GW Address [4..16] */
	switch(m){
		case 4:
			/* IPv4 */
			proto_tree_add_item(tree, hf_gtpv2_sgw_addr_ipv4, tvb, offset, 1, FALSE);
			offset+=4;
			break;
		case 16:
			/* IPv6 */
			proto_tree_add_item(tree, hf_gtpv2_sgw_addr_ipv6, tvb, offset, 1, FALSE);
			offset+=16;
			break;
		default:
			/* Error */

            expert_item = proto_tree_add_text(tree, tvb, 0, length, "Wrong length %u, should be 4 or 16",m);
            expert_add_info_format(pinfo, expert_item, PI_PROTOCOL, PI_ERROR, "Wrong length %u, should be 4 or 16",m);
            PROTO_ITEM_SET_GENERATED(expert_item);
			return;
	}
	/* (m+7) to (m+10)
	 * Serving GW S1-U TEID
	 */
	proto_tree_add_item(tree, hf_gtpv2_sgw_s1u_teid, tvb, offset, 4, FALSE);

}
/*
 * 8.27 Delay Value
 */

static void
dissect_gtpv2_delay_value(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_,  guint8 instance _U_)
{

    int offset = 0;

    proto_tree_add_item(tree, hf_gtpv2_delay_value, tvb, offset, 1, FALSE);


}
/*
 * 8.28 Bearer Context (grouped IE)
 */

static void
dissect_gtpv2_bearer_ctx(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree _U_, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
    int offset= 0;
    tvbuff_t  *new_tvb;
    proto_tree *grouped_tree;

    proto_item_append_text(item, "[Grouped IE]");
    grouped_tree = proto_item_add_subtree(item, ett_gtpv2_bearer_ctx);

	new_tvb = tvb_new_subset(tvb, offset, length, length );
    dissect_gtpv2_ie_common(new_tvb, pinfo, grouped_tree, 0, message_type);

}
/* 8.29 Charging ID */
static void
dissect_gtpv2_charging_id(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_,  guint8 instance _U_)
{

    int offset = 0;

    proto_tree_add_item(tree, hf_gtpv2_charging_id, tvb, offset, length, FALSE);


}


 /* 8.30 Charging Characteristics
  * The charging characteristics information element is defined in 3GPP TS 32.251 [8]
  * and is a way of informing both the SGW and PGW of the rules for producing charging
  * information based on operator configured triggers. For the encoding of this
  * information element see 3GPP TS 32.298 [9].
  */

static void
dissect_gtpv2_char_char(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{

    int offset = 0;

    proto_tree_add_item(tree, hf_gtpv2_charging_characteristic, tvb, offset, 2, FALSE);
    if(length>2){
        offset+=2;
        /* These octet(s) is/are present only if explicitly specified */
        proto_tree_add_text(tree, tvb, offset, length-2, "Remaining octets");
    }

}
/*
 * 8.30 Bearer Flag
 */
static void
dissect_gtpv2_bearer_flag(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{

    int offset = 0;

	/* Octet 5 Spare VB PPC */
    proto_tree_add_item(tree, hf_gtpv2_bearer_flag_ppc, tvb, offset, length, FALSE);
    proto_tree_add_item(tree, hf_gtpv2_bearer_flag_vb, tvb, offset, length, FALSE);

}
/*
 * 8.34 PDN Type
 */
static void
dissect_gtpv2_pdn_type(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{

    int offset = 0;
    guint8		pdn;

    if (length != 1) {
        proto_item *expert_item;
        expert_item = proto_tree_add_text(tree, tvb, 0, length, "Wrong length indicated. Expected 1, got %u", length);
        expert_add_info_format(pinfo, expert_item, PI_MALFORMED, PI_ERROR, "Wrong length indicated. Expected 1, got %u", length);
        PROTO_ITEM_SET_GENERATED(expert_item);
        return;
    }

    proto_tree_add_bits_item(tree, hf_gtpv2_spare_bits, tvb, offset<<3, 5, FALSE);
    pdn = tvb_get_guint8(tvb, offset)& 0x7;
    proto_tree_add_item(tree, hf_gtpv2_pdn_type, tvb, offset, length, FALSE);
    proto_item_append_text(tree, "%s", val_to_str(pdn, gtpv2_pdn_type_vals, "Unknown"));

}

/*
 * 8.31 Trace Information
 */
static void
dissect_gtpv2_tra_info(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item	*trigg, *msc_server, *mgw, *sgsn, *ggsn, *bm_sc, *sgw_mme, *ne_types;
	proto_tree	*trigg_tree, *msc_server_tree, *mgw_tree, *sgsn_tree, *ggsn_tree, *bm_sc_tree, *sgw_mme_tree, *ne_types_tree;
	proto_item	*interfaces, *imsc_server, *lmgw, *lsgsn, *lggsn, *lrnc, *lbm_sc, *lmme, *lsgw, *lpdn_gw, *lenb;
	proto_tree	*interfaces_tree, *imsc_server_tree, *lmgw_tree, *lsgsn_tree, *lggsn_tree, *lrnc_tree, *lbm_sc_tree, *lmme_tree, *lsgw_tree, *lpdn_gw_tree, *lenb_tree;

	int 		offset = 0;
	/*--------------------------------------------------
	* guint8 		*trace_id = NULL;
	*--------------------------------------------------*/
	guint8		tdl;
	guint16		tid;
	guint32		bit_offset;

	dissect_e212_mcc_mnc(tvb, pinfo, tree, 0, TRUE);
	offset +=3;

	/* Append Trace ID to main tree */
	tid = tvb_get_ntohs(tvb, offset);
	proto_item_append_text(tree, "Trace ID: %d  ", tid);

	/* Trace ID */
	/*--------------------------------------------------
	* trace_id = tvb_format_text(tvb, offset, 2);
	* proto_tree_add_string(tree, hf_gtpv2_tra_info, tvb, offset, length, trace_id);
	*--------------------------------------------------*/
	proto_tree_add_text(tree, tvb, offset, 3, "Trace ID: %d", tid);
	offset +=3;

	/* Triggering Events, put all into a new tree called trigging_tree */
	trigg = proto_tree_add_text(tree, tvb, offset, 8, "Trigging Events");
	trigg_tree = proto_item_add_subtree(trigg, ett_gtpv2_tra_info_trigg);

	/* Create all subtrees */
	msc_server = proto_tree_add_text(trigg_tree, tvb, offset, 2, "MSC Server");
	msc_server_tree = proto_item_add_subtree(msc_server, ett_gtpv2_tra_info_trigg_msc_server);

	mgw = proto_tree_add_text(trigg_tree, tvb, offset + 2, 1, "MGW");
	mgw_tree = proto_item_add_subtree(mgw, ett_gtpv2_tra_info_trigg_mgw);

	sgsn = proto_tree_add_text(trigg_tree, tvb, offset + 3, 2, "SGSN");
	sgsn_tree = proto_item_add_subtree(sgsn, ett_gtpv2_tra_info_trigg_sgsn);

	ggsn = proto_tree_add_text(trigg_tree, tvb, offset + 5, 1, "GGSN");
	ggsn_tree = proto_item_add_subtree(ggsn, ett_gtpv2_tra_info_trigg_ggsn);

	bm_sc = proto_tree_add_text(trigg_tree, tvb, offset + 6, 1, "BM-SC");
	bm_sc_tree = proto_item_add_subtree(bm_sc, ett_gtpv2_tra_info_trigg_bm_sc);

	sgw_mme = proto_tree_add_text(trigg_tree, tvb, offset + 7, 1, "SGW MME");
	sgw_mme_tree = proto_item_add_subtree(sgw_mme, ett_gtpv2_tra_info_trigg_sgw_mme);

		/* MSC Server - 2 octets */
	proto_tree_add_item(msc_server_tree, hf_gtpv2_tra_info_msc_momt_calls,		tvb, offset, 1, FALSE);
	proto_tree_add_item(msc_server_tree, hf_gtpv2_tra_info_msc_momt_sms,			tvb, offset, 1, FALSE);
	proto_tree_add_item(msc_server_tree, hf_gtpv2_tra_info_msc_lu_imsi_ad,		tvb, offset, 1, FALSE);
	proto_tree_add_item(msc_server_tree, hf_gtpv2_tra_info_msc_handovers,		tvb, offset, 1, FALSE);
	proto_tree_add_item(msc_server_tree, hf_gtpv2_tra_info_msc_ss,			tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(msc_server_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 3, FALSE);
	offset += 1;
	bit_offset = offset<<3;
	proto_tree_add_bits_item(msc_server_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 8, FALSE);
	offset += 1;

		/* MGW - 1 octet */
	proto_tree_add_item(mgw_tree, hf_gtpv2_tra_info_mgw_context,		tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(mgw_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 7, FALSE);
	offset += 1;
		/* SGSN - 2 octets */
	proto_tree_add_item(sgsn_tree, hf_gtpv2_tra_info_sgsn_pdp_context,		tvb, offset, 1, FALSE);
	proto_tree_add_item(sgsn_tree, hf_gtpv2_tra_info_sgsn_momt_sms,		tvb, offset, 1, FALSE);
	proto_tree_add_item(sgsn_tree, hf_gtpv2_tra_info_sgsn_rau_gprs_ad,		tvb, offset, 1, FALSE);
	proto_tree_add_item(sgsn_tree, hf_gtpv2_tra_info_sgsn_mbms,			tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(sgsn_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 4, FALSE);
	offset += 1;
	proto_tree_add_item(sgsn_tree, hf_gtpv2_tra_info_sgsn_reserved,		tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(sgsn_tree, hf_gtpv2_reserved,			tvb, bit_offset, 8, FALSE);
	offset += 1;
		/* GGSN - 1 octet */
	proto_tree_add_item(ggsn_tree, hf_gtpv2_tra_info_ggsn_pdp,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ggsn_tree, hf_gtpv2_tra_info_ggsn_mbms,			tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(ggsn_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 6, FALSE);
	offset += 1;
		/* BM-SC - 1 octet */
	proto_tree_add_item(bm_sc_tree, hf_gtpv2_tra_info_bm_sc,			tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(bm_sc_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 7, FALSE);
	offset += 1;
		/* MME/SGW - 1 octet */
	proto_tree_add_item(sgw_mme_tree, hf_gtpv2_tra_info_mme_sgw_ss,			tvb, offset, 1, FALSE);
	proto_tree_add_item(sgw_mme_tree, hf_gtpv2_tra_info_mme_sgw_sr,			tvb, offset, 1, FALSE);
	proto_tree_add_item(sgw_mme_tree, hf_gtpv2_tra_info_mme_sgw_iataud,		tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(sgw_mme_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 5, FALSE);
	offset += 1;

	/* Create NE Types subtree */
	ne_types = proto_tree_add_text(tree, tvb, offset, 2, "List of NE Types");
	ne_types_tree = proto_item_add_subtree(ne_types, ett_gtpv2_tra_info_ne_types);


	/* List of NE Types */
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_msc_s,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_mgw,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_sgsn,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_ggsn,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_rnc,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_bm_sc,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_mme,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_sgw,			tvb, offset, 1, FALSE);
	offset += 1;
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_pdn_gw,			tvb, offset, 1, FALSE);
	proto_tree_add_item(ne_types_tree, hf_gtpv2_tra_info_lne_enb,			tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(ne_types_tree, hf_gtpv2_spare_bits,			tvb, bit_offset, 6, FALSE);
	offset += 1;

	/* Trace Depth Length */
	tdl = tvb_get_guint8(tvb, offset);
	proto_tree_add_item(tree, hf_gtpv2_tra_info_tdl,			tvb, offset, 1, FALSE);
	offset += 1;

	/* Trace Depth List
		 Will be displayed if length of Trace Depth Length is > 0
		 The list will only contains UTF8String, RAW DATA	*/

	proto_tree_add_text(tree, tvb, offset, tdl, "Trace Depth List: %s", tvb_bytes_to_str(tvb, offset, tdl));
	offset += tdl;

	/* Set up subtree interfaces and put all interfaces under it */
	interfaces = proto_tree_add_text(tree, tvb, offset, 12, "List of Interfaces");
	interfaces_tree = proto_item_add_subtree(interfaces, ett_gtpv2_tra_info_interfaces);

	/* Create all subtrees */
	imsc_server = proto_tree_add_text(interfaces_tree, tvb, offset, 2, "MSC Server");
	imsc_server_tree = proto_item_add_subtree(imsc_server, ett_gtpv2_tra_info_interfaces_imsc_server);

	lmgw = proto_tree_add_text(interfaces_tree, tvb, offset + 2, 1, "MGW");
	lmgw_tree = proto_item_add_subtree(lmgw, ett_gtpv2_tra_info_interfaces_lmgw);

	lsgsn = proto_tree_add_text(interfaces_tree, tvb, offset + 3, 2, "SGSN");
	lsgsn_tree = proto_item_add_subtree(lsgsn, ett_gtpv2_tra_info_interfaces_lsgsn);

	lggsn = proto_tree_add_text(interfaces_tree, tvb, offset + 5, 1, "GGSN");
	lggsn_tree = proto_item_add_subtree(lggsn, ett_gtpv2_tra_info_interfaces_lggsn);

	lrnc = proto_tree_add_text(interfaces_tree, tvb, offset + 6, 1, "RNC");
	lrnc_tree = proto_item_add_subtree(lrnc, ett_gtpv2_tra_info_interfaces_lrnc);

	lbm_sc = proto_tree_add_text(interfaces_tree, tvb, offset + 7, 1, "BM-SC");
	lbm_sc_tree = proto_item_add_subtree(lbm_sc, ett_gtpv2_tra_info_interfaces_lbm_sc);

	lmme = proto_tree_add_text(interfaces_tree, tvb, offset + 8, 1, "MME");
	lmme_tree = proto_item_add_subtree(lmme, ett_gtpv2_tra_info_interfaces_lmme);

	lsgw = proto_tree_add_text(interfaces_tree, tvb, offset + 9, 1, "SGW");
	lsgw_tree = proto_item_add_subtree(lsgw, ett_gtpv2_tra_info_interfaces_lsgw);

	lpdn_gw = proto_tree_add_text(interfaces_tree, tvb, offset + 10, 1, "PDN GW");
	lpdn_gw_tree = proto_item_add_subtree(lpdn_gw, ett_gtpv2_tra_info_interfaces_lpdn_gw);

	lenb = proto_tree_add_text(interfaces_tree, tvb, offset + 11, 1, "eNB");
	lenb_tree = proto_item_add_subtree(lenb, ett_gtpv2_tra_info_interfaces_lpdn_lenb);

		/* MSC Server - 2 octests */
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_a,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_lu,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_mc,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_map_g,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_map_b,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_map_e,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_map_f,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_cap,				tvb, offset, 1, FALSE);
	offset += 1;
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_map_d,				tvb, offset, 1, FALSE);
	proto_tree_add_item(imsc_server_tree, hf_gtpv2_tra_info_lmsc_map_c,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(imsc_server_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 6, FALSE);
	offset += 1;
		/* MGW - 1 octet */
	proto_tree_add_item(lmgw_tree, hf_gtpv2_tra_info_lmgw_mc,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lmgw_tree, hf_gtpv2_tra_info_lmgw_nb_up,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lmgw_tree, hf_gtpv2_tra_info_lmgw_lu_up,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lmgw_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 5, FALSE);
	offset += 1;
		/* SGSN - 2 octets */
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_gb,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_lu,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_gn,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_map_gr,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_map_gd,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_map_gf,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_gs,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgsn_tree, hf_gtpv2_tra_info_lsgsn_ge,				tvb, offset, 1, FALSE);
	offset += 1;
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lsgsn_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 8, FALSE);
	offset += 1;

		/* GGSN - 1 octet */
	proto_tree_add_item(lggsn_tree, hf_gtpv2_tra_info_lggsn_gn,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lggsn_tree, hf_gtpv2_tra_info_lggsn_gi,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lggsn_tree, hf_gtpv2_tra_info_lggsn_gmb,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lggsn_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 5, FALSE);
	offset += 1;
		/* RNC - 1 octet */
	proto_tree_add_item(lrnc_tree, hf_gtpv2_tra_info_lrnc_lu,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lrnc_tree, hf_gtpv2_tra_info_lrnc_lur,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lrnc_tree, hf_gtpv2_tra_info_lrnc_lub,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lrnc_tree, hf_gtpv2_tra_info_lrnc_uu,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lrnc_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 4, FALSE);
	offset += 1;
		/* BM_SC - 1 octet */
	proto_tree_add_item(lbm_sc_tree, hf_gtpv2_tra_info_lbm_sc_gmb,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lbm_sc_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 7, FALSE);
	offset += 1;
		/* MME - 1 octet */
	proto_tree_add_item(lmme_tree, hf_gtpv2_tra_info_lmme_s1_mme,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lmme_tree, hf_gtpv2_tra_info_lmme_s3,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lmme_tree, hf_gtpv2_tra_info_lmme_s6a,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lmme_tree, hf_gtpv2_tra_info_lmme_s10,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lmme_tree, hf_gtpv2_tra_info_lmme_s11,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lmme_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 3, FALSE);
	offset += 1;
		/* SGW - 1 octet */
	proto_tree_add_item(lsgw_tree, hf_gtpv2_tra_info_lsgw_s4,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgw_tree, hf_gtpv2_tra_info_lsgw_s5,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgw_tree, hf_gtpv2_tra_info_lsgw_s8b,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lsgw_tree, hf_gtpv2_tra_info_lsgw_s11,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lsgw_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 4, FALSE);
	offset += 1;
		/* PDN GW - 1 octet */
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_s2a,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_s2b,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_s2c,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_s5,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_s6c,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_gx,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_s8b,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lpdn_gw_tree, hf_gtpv2_tra_info_lpdn_gw_sgi,			tvb, offset, 1, FALSE);
	offset += 1;
		/* eNB - 1 octet */
	proto_tree_add_item(lenb_tree, hf_gtpv2_tra_info_lenb_s1_mme,			tvb, offset, 1, FALSE);
	proto_tree_add_item(lenb_tree, hf_gtpv2_tra_info_lenb_x2,				tvb, offset, 1, FALSE);
	proto_tree_add_item(lenb_tree, hf_gtpv2_tra_info_lenb_uu,				tvb, offset, 1, FALSE);
	bit_offset = offset<<3;
	proto_tree_add_bits_item(lenb_tree, hf_gtpv2_spare_bits,					tvb, bit_offset, 5, FALSE);

	/*--------------------------------------------------
	* offset += 1;
	*--------------------------------------------------*/

	/* IP Address of Trace Collection Entity */
	while ( (offset + 4) <= length ) {
		offset += 1;
	 	proto_tree_add_item(tree, hf_gtpv2_ipv4_addr, tvb, offset, 4, FALSE);
		offset += 3;
	}
}
/*
 * 8.33 Paging Cause
 * 8.33 Void (TS 129 274 V9.4.0 (2010-10))
 */

/* 8.35 Procedure Transaction ID (PTI) */
static void
dissect_gtpv2_pti(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    proto_tree_add_item(tree, hf_gtpv2_pti, tvb, 0, 1, FALSE);
}
/*
 * 8.36 DRX Parameter
 */
static void
dissect_gtpv2_drx_param(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{
	int 	offset = 0;

	/* 36.413 : 9.2.1.17	Paging Cause, void */
  proto_tree_add_text(tree, tvb, offset, length, "DRX parameter: %s", tvb_bytes_to_str(tvb, offset, (length )));
}

/*
 * 8.37 UE Network Capability
 * UE Network Capability is coded as depicted in Figure 8.37-1. Actual coding of the UE Network Capability field is
 * defined in 3GPP TS 24.301
 */
static void
dissect_gtpv2_ue_net_capability(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{
	de_emm_ue_net_cap(tvb, tree, 0, length, NULL, 0);

}
/*
 * 8.38 MM Context
 */
static const value_string gtpv2_mm_context_security_mode[] = {
	{0, "GSM Key and Triplets"},
	{1, "UMTS Key, Used Cipher and Quintuplets"},
	{2, "GSM Key, Used Cipher and Quintuplets"},
	{3, "UMTS Key and Quintuplets"},
	{4, "EPS Security Context, Quadruplets and Quintuplets"	},
	{5, "UMTS Key, Quadruplets and Quintuplets"},
	{0, NULL																									}
};

static const true_false_string gtpv2_nhi_vals = {
	"NH (Next Hop) and NCC (Next Hop Chaining Count) are both present",
	"NH (Next Hop) and NCC (Next Hop Chaining Count) not present",
};

/* Table 8.38-2: Used NAS Cipher Values */

static const value_string gtpv2_mm_context_unc_vals[] = {
	{0, "No ciphering"},
	{1, "GEA/1"},
	{2, "GEA/2"},
	{3, "GEA/3"},
	{4, "GEA/4"	},
	{5, "GEA/5"},
	{6, "GEA/6"},
	{7, "GEA/7"},
	{0, NULL																									}
};

/* Table 8.38-4: Used NAS integrity protection algorithm Values */
static const value_string gtpv2_mm_context_unipa_vals[] = {
	{0, "No ciphering"},
	{1, "128-EEA1"},
	{2, "128-EEA2"},
	{3, "EEA3"},
	{4, "EEA4"	},
	{5, "EEA5"},
	{6, "EEA6"},
	{7, "EEA7"},
	{0, NULL																									}
};


static void
dissect_gtpv2_mm_context_gsm_t(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree _U_, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	proto_item   *flag;
	proto_tree  *flag_tree;
	int          offset;

	offset = 0;
	flag = proto_tree_add_text(tree, tvb, offset, 3, "MM Context flags");
	flag_tree = proto_item_add_subtree(flag, ett_gtpv2_mm_context_flag);

	/* Security Mode | Spare | DRXI | CKSN */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_sm, tvb, offset, 1, FALSE);

	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, offset<<3, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_drxi, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_cksn, tvb, offset, 1, FALSE);
	offset += 1;
	/* Number of Triplet | Spare  | UAMB RI | SAMB RI */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_tri, tvb, offset, 1, FALSE);
	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, offset<<3, 5, FALSE);
	offset += 1;

	proto_tree_add_text(flag_tree, tvb, offset, -1, "The rest of the IE not dissected yet");

}

static void
dissect_gtpv2_mm_context_utms_cq(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item 	*flag;
	proto_tree	*flag_tree;
	int			offset;

	offset = 0;
	flag = proto_tree_add_text(tree, tvb, offset, 3, "MM Context flags");
	flag_tree = proto_item_add_subtree(flag, ett_gtpv2_mm_context_flag);

	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_sm, tvb, offset, 1, FALSE);

	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, ((offset<<3)+3), 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_drxi, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_cksn_ksi, tvb, offset, 1, FALSE);
	offset += 1;
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_qui, tvb, offset, 1, FALSE);
	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, offset<<3, 5, FALSE);
	offset += 1;

	proto_tree_add_text(flag_tree, tvb, offset, -1, "The rest of the IE not dissected yet");
}

static void
dissect_gtpv2_mm_context_gsm_cq(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item 	*flag;
	proto_tree	*flag_tree;
	int			offset;


	offset = 0;
	flag = proto_tree_add_text(tree, tvb, offset, 3, "MM Context flags");
	flag_tree = proto_item_add_subtree(flag, ett_gtpv2_mm_context_flag);

	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_sm, tvb, offset, 1, FALSE);

	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, ((offset<<3)+3), 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_drxi, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_cksn_ksi, tvb, offset, 1, FALSE);
	offset += 1;
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_qui, tvb, offset, 1, FALSE);
	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, offset<<3, 5, FALSE);
	offset += 1;

	proto_tree_add_text(flag_tree, tvb, offset, -1, "The rest of the IE not dissected yet");

}

static void
dissect_gtpv2_mm_context_utms_q(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item 	*flag;
	proto_tree	*flag_tree;
	int			offset;

	offset = 0;
	flag = proto_tree_add_text(tree, tvb, offset, 3, "MM Context flags");
	flag_tree = proto_item_add_subtree(flag, ett_gtpv2_mm_context_flag);


	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_sm, tvb, offset, 1, FALSE);

	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, ((offset<<3)+3), 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_drxi, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_ksi, tvb, offset, 1, FALSE);
	offset += 1;
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_qui, tvb, offset, 1, FALSE);
	proto_tree_add_bits_item(flag_tree, hf_gtpv2_spare_bits, tvb, offset<<3, 5, FALSE);
	offset += 1;

	proto_tree_add_text(flag_tree, tvb, offset, -1, "The rest of the IE not dissected yet");

}

/* EPS Security Context and Quadruplets */
static void
dissect_gtpv2_mm_context_eps_qq(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item 	*flag/*, *auth_qua, *net_cap*/;
	proto_tree	*flag_tree/*, *auth_qua_tree, *net_cap_tree*/;
	guint32			offset/*, nas_dc, nas_uc, i*/;
	/*guint8			nhi, drxi, nr_qui, nr_qua, tmp;*/

	offset = 0;

	/*nhi = (tvb_get_guint8(tvb, offset) & 0x10);*/
	/*drxi = (tvb_get_guint8(tvb, offset) & 0x08);*/

	flag = proto_tree_add_text(tree, tvb, offset, 3, "MM Context flags");
	flag_tree = proto_item_add_subtree(flag, ett_gtpv2_mm_context_flag);

	/* Octet 5
	 * Bits
	 * 8      7     6     5     4      3      2      1
	 * Security Mode    | NHI | DRXI | KSIASME
	 */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_sm, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nhi, tvb, offset, 1, FALSE);
	/* If NHI (Next Hop Indicator), bit 5 of octet 5, is set to "1",
	 * then the optional parameters NH (Next Hop) and NCC (Next
	 * Hop Chaining Count) are both present, otherwise their octets are not present.
	 */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_drxi, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_ksi_a, tvb, offset, 1, FALSE);
	offset += 1;

	/* Octet 6
	 * Bits
	 * 8      7     6     5     4      3      2      1
	 * Number of        | Number of       | UAMB  | OSCI
	 * Quintuplets      | Quadruplet      |  RI   |
     */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_qui, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_qua, tvb, offset, 1, FALSE);

	/* Octet 7 */
	/* Used NAS integrity protection algorithm */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_unipa, tvb, offset, 1, FALSE);
	/* Used NAS Cipher */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_unc,	tvb, offset, 1, FALSE);
	offset += 1;

	/* Octet 8-10 NAS Downlink Count*/
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nas_dl_cnt,	tvb, offset, 1, FALSE);
	offset += 3;

	/* Octet 11-13 NAS Uplink Count */
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nas_ul_cnt,	tvb, offset, 1, FALSE);
	offset += 3;

	proto_tree_add_text(flag_tree, tvb, offset, -1, "The rest of the IE not dissected yet");

}
static void
dissect_gtpv2_mm_context_utms_qq(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item 	*flag;
	proto_tree	*flag_tree;
	guint32			offset;

	offset = 0;
	flag = proto_tree_add_text(tree, tvb, offset, 3, "MM Context flags");
	flag_tree = proto_item_add_subtree(flag, ett_gtpv2_mm_context_flag);

	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_sm, tvb, offset, 1, FALSE);

	proto_tree_add_item(flag_tree, hf_gtpv2_spare_bits,	tvb, ((offset<<3)+3), 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_drxi, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_ksi_a, tvb, offset, 1, FALSE);
	offset += 1;
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_qui, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_mm_context_nr_qua, tvb, offset, 1, FALSE);
	proto_tree_add_item(flag_tree, hf_gtpv2_spare_bits,	tvb, offset<<3, 2, FALSE);

}

/*
  * 8.39 PDN Connection (grouped IE)
 */
static void
dissect_gtpv2_PDN_conn(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree _U_, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset= 0;
    proto_tree *grouped_tree;
	tvbuff_t *new_tvb;

    proto_item_append_text(item, "[Grouped IE]");
    grouped_tree = proto_item_add_subtree(item, ett_gtpv2_PDN_conn);
    new_tvb = tvb_new_subset(tvb, offset, length, length );

    dissect_gtpv2_ie_common(tvb, pinfo, grouped_tree, offset, message_type);
}
/*
 * 8.40 PDU Numbers
 */
static void
dissect_gtpv2_pdn_numbers(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item	*nsapi_ti;
	proto_tree	*nsapi_tree;
	guint8			nsapi;
	guint16			dlgtpu_seq, ulgtpu_seq, send_npdu_nr, rec_npdu_nr;
	int					offset = 0;

	nsapi = (tvb_get_guint8(tvb, offset) & 0x08);
	nsapi_ti = proto_tree_add_text(tree, tvb, offset, 1, "NSAPI: %d", nsapi);
	nsapi_tree = proto_item_add_subtree(nsapi_ti, ett_gtpv2_pdn_numbers_nsapi);
	proto_tree_add_item(nsapi_tree, hf_gtpv2_spare_bits,	tvb, offset<<3, 4, FALSE);
	proto_tree_add_item(nsapi_tree, hf_gtpv2_pdn_numbers_nsapi, tvb, offset, 1, FALSE);
	proto_item_append_text(tree, "NSAPI: %u", nsapi);
	offset++;

	dlgtpu_seq = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "DL GTP-U Sequence Number: %d", dlgtpu_seq);
	offset += 2;

	ulgtpu_seq = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "UL GTP-U Sequence Number: %d", ulgtpu_seq);
	offset += 2;

	send_npdu_nr = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "Send N-PDU Number: %d", send_npdu_nr);
	offset += 2;

	rec_npdu_nr = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "Receive N-PDU Number: %d", rec_npdu_nr);
}
/*
 * 8.41 Packet TMSI (P-TMSI)
 */
static void
dissect_gtpv2_p_tmsi(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	int				offset = 0;


	/* The TMSI consists of 4 octets. It can be coded using a full hexadecimal representation. */
	proto_tree_add_item(tree, hf_gtpv2_p_tmsi,	tvb, offset, 4, FALSE);
	proto_item_append_text(tree, "%s", tvb_bytes_to_str(tvb, offset, 4));
}
/*
 * 8.42 P-TMSI Signature
 */
static void
dissect_gtpv2_p_tmsi_sig(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	int				offset = 0;

	/* The P-TMSI Signature consists of 3 octets and may be allocated by the SGSN. */
	proto_tree_add_item(tree, hf_gtpv2_p_tmsi_sig,	tvb, offset, 3, FALSE);
	proto_item_append_text(tree, "%s", tvb_bytes_to_str(tvb, offset, 3));

}
/*
 * 8.43 Hop Counter
 */
static void
dissect_gtpv2_hop_counter(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	int 		offset = 0;
	guint8	hop_counter;

	hop_counter = tvb_get_guint8(tvb, offset);

	proto_tree_add_text(tree, tvb, offset, 1, "Hop Counter: %d", hop_counter);
	proto_item_append_text(tree, "%d", hop_counter);
}

/*
 * 8.44 UE Time Zone
 */

static const value_string gtpv2_ue_time_zone_dst_vals[] = {
    {0, "No Adjustments for Daylight Saving Time"},
    {1, "+1 Hour Adjustments for Daylight Saving Time"},
    {2, "+2 Hour Adjustments for Daylight Saving Time"},
    {3, "Spare"},
    {0, NULL}
};
static void
dissect_gtpv2_ue_time_zone(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;

	/*
	 * UE Time Zone is used to indicate the offset between universal time and local time in steps of 15 minutes of where the
	 * UE currently resides. The "Time Zone" field uses the same format as the "Time Zone" IE in 3GPP TS 24.008 [5].
	 * (packet-gsm_a_dtap.c)
	 */
	de_time_zone(tvb, tree, offset, 1, NULL, 0);
    offset= offset+ 1;
    proto_tree_add_item(tree, hf_gtpv2_ue_time_zone_dst, tvb, offset, 1, FALSE);


}
/*
 * 8.45 Trace Reference
 */
static void
dissect_gtpv2_trace_reference(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
    int         offset = 0;
    guint32	    trace_id;
    gchar		*mcc_mnc_str;

    mcc_mnc_str = dissect_e212_mcc_mnc_ep_str(tvb, pinfo, tree, 0, TRUE);
	offset += 3;

	trace_id = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 3, "Trace ID: %d", trace_id);

	proto_item_append_text(tree,"%s,Trace ID %u", mcc_mnc_str, trace_id);
}
/*
 * 8.46 Complete Request Message
 */
static const value_string gtpv2_complete_req_msg_type_vals[] = {
	{0, "Complete Attach Request Message" 	},
	{1, "Complete TAU Request Message"			},
	{0, NULL																}
};
static void
dissect_complete_request_msg(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	tvbuff_t  *new_tvb;
	int        offset;

	offset = 0;

	proto_tree_add_item(tree, hf_gtpv2_complete_req_msg_type, tvb, offset, 1, FALSE);

	offset++;

	/* Add the Complete Request Message */
	new_tvb = tvb_new_subset_remaining(tvb, offset);
    call_dissector(nas_eps_handle, new_tvb, pinfo, tree);

}

/*
 * 8.47 GUTI
 */
static void
dissect_gtpv2_guti(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int offset = 0;

	offset = 0;

	dissect_e212_mcc_mnc(tvb, pinfo, tree, 0, TRUE);
	offset += 3;

	proto_tree_add_item(tree, hf_gtpv2_mme_grp_id, tvb, offset, 2, FALSE);
	offset += 2;

	proto_tree_add_item(tree, hf_gtpv2_mme_code, tvb, offset, 1, FALSE);
	offset++;

	proto_tree_add_item(tree, hf_gtpv2_m_tmsi, tvb, offset,4, FALSE);
}

/*
 * 8.48 Fully Qualified Container (F-Container)
 */

static const value_string gtpv2_container_type_vals[] = {
    {1, "UTRAN transparent container"},
    {2, "BSS container"},
    {3, "E-UTRAN transparent container"},
    {0, NULL}
};


static void
dissect_gtpv2_F_container(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_item *item _U_, guint16 length,guint8 message_type,  guint8 instance _U_)
{
	tvbuff_t *tvb_new;
    int offset = 0;
	guint8 container_type;

	/* Octets	8	7	6	5	4	3	2	1
	 * 5			Spare	  |	Container Type
	 */
    proto_tree_add_item(tree, hf_gtpv2_container_type, tvb, offset, 1, FALSE);
	container_type = tvb_get_guint8(tvb,offset);
	offset++;
	if(message_type == GTPV2_FORWARD_CTX_NOTIFICATION){
		switch(container_type){
			case 3:
				/* E-UTRAN transparent container */
				tvb_new = tvb_new_subset_remaining(tvb, offset);
				dissect_s1ap_ENB_StatusTransfer_TransparentContainer_PDU(tvb_new, pinfo, tree);
				return;
			default:
				break;
		}
	}
	/* 7.3.2 Forward Relocation Response
	 * E-UTRAN Transparent Container
	 * This IE is conditionally included only during a handover to
	 * E-UTRAN and contains the radio-related and core network
	 * information. If the Cause IE contains the value "Request
	 * accepted", this IE shall be included.
	 */
	proto_tree_add_text(tree, tvb, offset, length-offset, "Not dissected yet");

}

/*
 * 8.49 Fully Qualified Cause (F-Cause)
 */

static const value_string gtpv2_cause_type_vals[] = {
    {0,  "Radio Network Layer"},
    {1,  "Transport Layer"},
    {2,  "NAS"},
    {3,  "Protocol"},
    {4,  "Miscellaneous"},
    {5,  "<spare>"},
    {6,  "<spare>"},
    {7,  "<spare>"},
    {8,  "<spare>"},
    {9,  "<spare>"},
    {10, "<spare>"},
    {11, "<spare>"},
    {12, "<spare>"},
    {13, "<spare>"},
    {14, "<spare>"},
    {15, "<spare>"},
    {0, NULL}
};
static value_string_ext gtpv2_cause_type_vals_ext = VALUE_STRING_EXT_INIT(gtpv2_cause_type_vals);

static void
dissect_gtpv2_F_cause(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{

    int offset = 0;
	guint8 cause_type;

	/* The value of Instance field of the F-Cause IE in a GTPv2 message shall indicate
	 * whether the F-Cause field contains RANAP Cause, BSSGP Cause or RAN Cause.
	 * If the F-Cause field contains RAN Cause, the Cause Type field shall contain
	 * the RAN cause subcategory as specified in 3GPP TS 36.413 [10] and it shall be
	 * encoded as in Table 8.49-1.
	 * If the F-Cause field contains BSSGP Cause or RANAP Cause,
	 * the Cause Type field shall be ignored by the receiver.
	 */
	if(message_type == GTPV2_FORWARD_RELOCATION_REQ){
		switch(instance){
			case 0:
				proto_item_append_text(item, "[RAN Cause]");
				proto_tree_add_item(tree, hf_gtpv2_cause_type, tvb, offset, 1, FALSE);
				cause_type = tvb_get_guint8(tvb,offset);
				offset++;
				switch(cause_type){
					case 0:
						/* CauseRadioNetwork */
						proto_tree_add_item(tree, hf_gtpv2_CauseRadioNetwork, tvb, offset, 1, FALSE);
						break;
					case 1:
						/* CauseTransport */
						proto_tree_add_item(tree, hf_gtpv2_CauseTransport, tvb, offset, 1, FALSE);
						break;
					case 2:
						/* CauseNas */
						proto_tree_add_item(tree, hf_gtpv2_CauseNas, tvb, offset, 1, FALSE);
						break;
					case 3:
						/* CauseProtocol */
						proto_tree_add_item(tree, hf_gtpv2_CauseProtocol, tvb, offset, 1, FALSE);
						break;
					case 4:
						/* CauseMisc */
						proto_tree_add_item(tree, hf_gtpv2_CauseMisc, tvb, offset, 1, FALSE);
						break;
					default:
						break;
				}
				return;
				break;
			case 1:
				proto_item_append_text(item, "[RANAP Cause]");
				break;
			case 2:
				proto_item_append_text(item, "[BSSGP Cause]");
				break;
			default:
				break;
		}
	}
	proto_tree_add_text(tree, tvb, offset, length-offset, "Not dissected yet");

}
/*
 * 8.50 Selected PLMN ID
 */
/*
 * The Selected PLMN ID IE contains the core network operator selected for tne UE
 * in a shared network. Octets 5-7 shall be encoded as the content part of the
 *  "Selected PLMN Identity" parameter in 3GPP TS 36.413 [10].
 * -The Selected PLMN identity consists of 3 digits from MCC followed by
 * either -a filler digit plus 2 digits from MNC (in case of 2 digit MNC) or
 * -3 digits from MNC (in case of a 3 digit MNC).
 */
static void
dissect_gtpv2_sel_plmn_id(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
    gchar		*mcc_mnc_str;

    mcc_mnc_str = dissect_e212_mcc_mnc_ep_str(tvb, pinfo, tree, 0, TRUE);
	proto_item_append_text(tree,"%s", mcc_mnc_str);
}

/*
 * 8.51 Target Identification
 */

static const value_string gtpv2_target_type_vals[] = {
    {0,  "RNC ID"},
    {1,  "Macro eNodeB ID"},
    {2,  "Cell Identifier"},
    {3,  "Home eNodeB ID"},
    {0, NULL}
};
static value_string_ext gtpv2_target_type_vals_ext = VALUE_STRING_EXT_INIT(gtpv2_target_type_vals);

static void
dissect_gtpv2_target_id(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	tvbuff_t *tvb_new;
    int offset = 0;
	guint8 target_type;

	proto_tree_add_item(tree, hf_gtpv2_target_type, tvb, 0, 1, FALSE);
	target_type = tvb_get_guint8(tvb,offset);
	offset++;
	switch(target_type){
		case 0:
			/* RNC ID
			 * In this case the Target ID field shall be encoded as the Target
			 * RNC-ID part of the "Target ID" parameter in 3GPP TS 25.413 [33]. Therefore, the "Choice Target ID" that indicates
			 * "Target RNC-ID" (numerical value of 0x20) shall not be included (value in octet 5 specifies the target type).
			 */
			tvb_new = tvb_new_subset_remaining(tvb, offset);
			dissect_ranap_TargetRNC_ID_PDU(tvb_new, pinfo, tree);
			return;
			break;
		case 1:
			/* Macro eNodeB ID*/
			tvb_new = tvb_new_subset_remaining(tvb, offset);
			dissect_e212_mcc_mnc(tvb_new, pinfo, tree, 0, TRUE);
			offset+=3;
			/* The Macro eNodeB ID consists of 20 bits.
			 * Bit 4 of Octet 4 is the most significant bit and bit 1 of Octet 6 is the least significant bit.
			 */
			proto_tree_add_item(tree, hf_gtpv2_macro_enodeb_id, tvb, offset, 3, FALSE);
			offset+=3;
			/* Tracking Area Code (TAC) */
			proto_tree_add_item(tree, hf_gtpv2_uli_tai_tac, tvb, offset, 2, FALSE);
			return;

		case 2:
			/* Cell Identifier */
			/* Target ID field shall be same as the Octets 3 to 10 of the Cell Identifier IEI
			* in 3GPP TS 48.018 [34].
			*/
		case 3:
			/* Home eNodeB ID */
			/* Octet 10 to 12 Home eNodeB ID */
			/* Octet 13 to 14 Tracking Area Code (TAC) */

		default:
			break;
	}
	proto_tree_add_text(tree, tvb, offset, length-offset, "Not dissected yet");

}

/*
 * 8.52 Void
 */
/*
 * 8.53 Packet Flow ID
 */
static void
dissect_gtpv2_pkt_flow_id(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	int offset = 0;

	/* Octet 5 Spare EBI */
	proto_tree_add_bits_item(tree, hf_gtpv2_spare_bits, tvb, offset<<3, 4, FALSE);
	proto_tree_add_item(tree, hf_gtpv2_ebi, tvb, offset, 2, FALSE);
	offset++;

	/* Packet Flow ID */
	proto_tree_add_text(tree, tvb, offset, length, "Packet Flow ID: %s", tvb_bytes_to_str(tvb, offset, length-1));

}
/*
 * 8.54 RAB Context
 */
static void
dissect_gtpv2_rab_context(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	int offset = 0;
	guint16			dlgtpu_seq, ulgtpu_seq, dl_pdcp_seq, ul_pdcp_seq;

	/* 5 Spare NSAPI */
	proto_tree_add_bits_item(tree, hf_gtpv2_spare_bits, tvb, offset<<3, 4, FALSE);
	proto_tree_add_item(tree, hf_gtpv2_nsapi, tvb, offset, 1, FALSE);

	/* 6 to 7 DL GTP-U Sequence Number */
	dlgtpu_seq = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "DL GTP-U Sequence Number: %d", dlgtpu_seq);
	offset += 2;

	/* 8 to 9 UL GTP-U Sequence Number */
	ulgtpu_seq = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "UL GTP-U Sequence Number: %d", ulgtpu_seq);
	offset += 2;

	/* 10 to 11 DL PDCP Sequence Number */
	dl_pdcp_seq = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "DL PDCP Sequence Number: %d", dl_pdcp_seq);
	offset += 2;

	/* 12 to 13 UL PDCP Sequence Number */
	ul_pdcp_seq = tvb_get_ntohs(tvb, offset);
	proto_tree_add_text(tree, tvb, offset, 2, "UL PDCP Sequence Number: %d", ul_pdcp_seq);


}
/*
 * 8.55 Source RNC PDCP context info
 */
static void
dissect_gtpv2_s_rnc_pdcp_ctx_info(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{
	proto_tree_add_text(tree, tvb, 0, length, "RRC Container");
}

/*
 * 8.56 UDP Source Port Number
 */
static void
dissect_udp_s_port_nr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_tree_add_text(tree, tvb, 0, 2, "UPD Source Port Number: %u", tvb_get_ntohs(tvb, 0));
	proto_item_append_text(tree, "%u", tvb_get_ntohs(tvb, 0));
}
/*
 * 8.57 APN Restriction
 */
static void
dissect_gtpv2_apn_rest(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    guint8		type_value;

    type_value = tvb_get_guint8(tvb, 0);
    proto_tree_add_item(tree, hf_gtpv2_apn_rest, tvb, 0, 1, FALSE);
    proto_item_append_text(item, "value %u", type_value);
}

/*
 * 8.58 Selection Mode
 */
static const value_string gtpv2_selec_mode_vals[] = {
    {0, "MS or network provided APN, subscribed verified"},
    {1, "MS provided APN, subscription not verified"},
    {2, "Network provided APN, subscription not verified"},
    {3, "Network provided APN, subscription not verified (Basically for Future use"},
    {0, NULL}
};

static void
dissect_gtpv2_selec_mode(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    int          offset=0;
    guint8       ss_mode;

	ss_mode = tvb_get_guint8(tvb, offset) & 0x03;
    proto_tree_add_item(tree, hf_gtpv2_selec_mode, tvb, offset, 1, FALSE);
	proto_item_append_text(item, "%s", val_to_str(ss_mode, gtpv2_selec_mode_vals, "Unknown"));
}


/*
 * 8.59 Source Identification
 */
static const value_string gtpv2_source_ident_types[] = {
	{0, "Cell ID"},
	{1, "RNC ID"},
	{2, "eNodeB ID(Reserved, used in erlier v of proto.)"},
	{0,	NULL}
};
static void
dissect_gtpv2_source_ident(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item *expert_item;
    int          offset=0;
	guint8       source_type;

    /* Octet 5 to 12 Target Cell ID */
	de_cell_id(tvb, tree, offset, 8, NULL, 0);
	offset+=8;
    /* Octet 13 Source Type */
	source_type = tvb_get_guint8(tvb, offset);
	proto_tree_add_item(tree, hf_gtpv2_source_type, tvb, offset, 1, FALSE);
	offset++;
    /* Octet 14 to (n+4) Source ID */
	switch(source_type){
		case 0:
			/* The Source Type is Cell ID for PS handover from GERAN A/Gb mode. In this case the coding of the Source ID field
             * shall be same as the Octets 3 to 10 of the Cell Identifier IEI in 3GPP TS 48.018 [34].
             */
            de_cell_id(tvb, tree, offset, 8, NULL, 0);
            offset+=8;
			break;
		case 1:
			/* The Source Type is RNC ID for PS handover from GERAN Iu mode or for inter-RAT handover from UTRAN. In this
             * case the Source ID field shall be encoded as as the Source RNC-ID part of the "Source ID" parameter in 3GPP TS
             * 25.413 [33].
             */
			/* RNC-ID M INTEGER (0..4095) */
			break;
		case 2:
			break;
		default:
            expert_item = proto_tree_add_text(tree, tvb, offset-1, 1, "Unknown source type");
            expert_add_info_format(pinfo, expert_item, PI_PROTOCOL, PI_ERROR, "Unknown source type");
            PROTO_ITEM_SET_GENERATED(expert_item);
			break;
	}

}
 /*
  * 8.60 Bearer Control Mode
  */

 static const value_string gtpv2_bearer_control_mode_vals[] = {
    {0, "Selected Bearer Control Mode-'MS_only'"},
    {1, "Selected Bearer Control Mode-'Network_only'"},
    {2, "Selected Bearer Control Mode-'MS/NW'"},
    {0, NULL}
};
 static const value_string gtpv2_bearer_control_mode_short_vals[] = {
    {0, "MS_only"},
    {1, "Network_only"},
    {2, "MS/NW"},
    {0, NULL}
};

static void
dissect_gtpv2_bearer_control_mode(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    guint8		bcm;

    proto_tree_add_item(tree, hf_gtpv2_bearer_control_mode, tvb, 0, 1, FALSE);
    /* Add Bearer Control Mode to tree */
    bcm = tvb_get_guint8(tvb, 0);
    proto_item_append_text(tree, "%s", val_to_str(bcm, gtpv2_bearer_control_mode_short_vals, "Unknown"));

}
/*
 * 8.61 Change Reporting Action
 */
static const value_string gtpv2_cng_rep_act_vals[] = {
    {0, "Stop Reporting"},
    {1, "Start Reporting CGI/SAI"},
    {2, "Start Reporting RAI"},
    {3, "Start Reporting TAI"},
    {4, "Start Reporting ECGI"},
    {5, "Start Reporting CGI/SAI and RAI"},
    {6, "Start Reporting TAI and ECGI"},
    {0, NULL}
};

static void
dissect_gtpv2_cng_rep_act(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
    guint8		action;

    /* Add Action to tree */
    action = tvb_get_guint8(tvb, 0);
    proto_tree_add_item(tree, hf_gtpv2_cng_rep_act, tvb, 0, 1, FALSE);

    proto_item_append_text(tree, "%s", val_to_str(action, gtpv2_cng_rep_act_vals, "Unknown"));
}
/*
 * 8.62 Fully qualified PDN Connection Set Identifier (FQ-CSID)
 */
static const value_string gtpv2_fq_csid_type_vals[] = {
    {0, "Global unicast IPv4 address"},
    {1, "Global unicast IPv6 address"},
    {2, "4 octets long field"},
    {0, NULL}
};


static void
dissect_gtpv2_fq_csid(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_, guint8 instance _U_)
{
	proto_item *expert_item;
	int      offset = 0;
	guint8	 octet,node_id_type, csids;
	guint32  node_id, node_id_mcc_mnc;

	/* Octet 5 Node-ID Type Number of CSIDs= m */

	octet = tvb_get_guint8(tvb, offset);
	node_id_type = octet >> 4;
	csids = octet & 0x0f;
	proto_tree_add_item(tree, hf_gtpv2_fq_csid_type, tvb, offset, 1, FALSE);
	proto_tree_add_item(tree, hf_gtpv2_fq_csid_nr, tvb, offset, 1, FALSE);
	offset++;

	switch(node_id_type){
		case 0:
			/* Indicates that Node-ID is a global unicast IPv4 address and p = 9 */
			proto_tree_add_item(tree, hf_gtpv2_fq_csid_ipv4, tvb, offset, 4, FALSE);
			offset += 4;
			break;
		case 1:
			/* Indicates that Node-ID is a global unicast IPv6 address and p = 21 */
			proto_tree_add_item(tree, hf_gtpv2_fq_csid_ipv6, tvb, offset, 16, FALSE);
			offset += 16;
			break;
		case 2:
            /* Node-ID is a 4 octets long field with a 32 bit value stored in network order, and p= 9. The coding
             * of the field is specified below:
			 * - Most significant 20 bits are the binary encoded value of (MCC * 1000 + MNC).
			 * - Least significant 12 bits is a 12 bit integer assigned by an operator to an MME, SGW or PGW. Other values of
             *   Node-ID Type are reserved.
			 */
			node_id = tvb_get_ntohl(tvb, offset);
			node_id_mcc_mnc = node_id >> 12;
			node_id = node_id & 0xfff;
			proto_tree_add_text(tree, tvb, offset, 4, "Node-ID: MCC+MNC %u, Id: %u",node_id_mcc_mnc, node_id);
			offset+=4;
			break;
		default:
            expert_item = proto_tree_add_text(tree, tvb, offset-1, 1, "Wrong Node-ID Type %u, should be 0-2(Or tis is a newer spec)",node_id_type);
            expert_add_info_format(pinfo, expert_item, PI_PROTOCOL, PI_ERROR, "Wrong Node-ID Type %u, should be 0-2(Or tis is a newer spec)",node_id_type);
            PROTO_ITEM_SET_GENERATED(expert_item);
			return;
	}

	/* First PDN Connection Set Identifier (CSID)
	 * Second PDN Connection Set Identifier (CSID)
	 *  :
	 * m-th PDN Connection Set Identifier (CSID)
	 */
	while ( csids-- )
	{
		proto_tree_add_item(tree, hf_gtpv2_fq_csid_id, tvb, offset, 2, FALSE);
		offset += 2;
	}

}
/*
 * 8.63 Channel needed
 */
static void
dissect_gtpv2_channel_needed(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{

	/* The Channel needed shall be coded as depicted in Figure 8.63-1. Channel needed is coded as the IEI part and the value
	 * part of the Channel Needed IE defined in 3GPP TS 44.018[28]
	 */
	de_rr_chnl_needed(tvb, tree, 0, length, NULL, 0);
}

/*
 * 8.64 eMLPP Priority
 * The eMLPP-Priority shall be coded as depicted in Figure 8.64-1. The eMLPP Priority is coded as the value part of the
 * eMLPP-Priority IE defined in 3GPP TS 48.008 [29] (not including 3GPP TS 48.008 IEI and 3GPP TS 48.008 [29]
 * length indicator).
 */
static void
dissect_gtpv2_emlpp_pri(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{

	be_emlpp_prio(tvb, tree, 0, length, NULL, 0);

}
/*
 * 8.65 Node Type
 */
static const value_string gtpv2_node_type_vals[] = {
    {0, "MME"},
    {1, "SGSN"},
    {0, NULL}
};

static void
dissect_gtpv2_node_type(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{

    guint8		node_type;

    proto_tree_add_item(tree, hf_gtpv2_node_type, tvb, 0, 1, FALSE);
	/* Append Node Type to tree */
    node_type = tvb_get_guint8(tvb, 0);
    proto_item_append_text(tree, "%s", val_to_str(node_type, gtpv2_node_type_vals, "Unknown"));

}

 /*
  * 8.66 Fully Qualified Domain Name (FQDN)
  */
static void
dissect_gtpv2_fqdn(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	int         offset = 0, name_len, tmp;
	guint8 		*fqdn = NULL;
	/* The FQDN field encoding shall be identical to the encoding of
	 * a FQDN within a DNS message of section 3.1 of IETF
	 * RFC 1035 [31] but excluding the trailing zero byte.
	 */
	if (length > 0) {
		name_len = tvb_get_guint8(tvb, offset);

		if (name_len < 0x20) {
			fqdn = tvb_get_ephemeral_string(tvb, offset + 1, length - 1);
			for (;;) {
				if (name_len >= length - 1)
					break;
				tmp = name_len;
				name_len = name_len + fqdn[tmp] + 1;
				fqdn[tmp] = '.';
			}
		} else{
			fqdn = tvb_get_ephemeral_string(tvb, offset, length);
		}
		proto_tree_add_string(tree, hf_gtpv2_fqdn, tvb, offset, length, fqdn);
		proto_item_append_text(item, "%s", fqdn);
	}

}
/*
 * 8.67 Private Extension
 */
static void
dissect_gtpv2_private_ext(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_,guint8 message_type _U_,  guint8 instance _U_)
{
	int offset = 0;

	/* oct 5 -7 Enterprise ID */
    proto_tree_add_item(tree, hf_gtpv2_enterprise_id, tvb, offset, 2, FALSE);
	offset+=2;
	proto_tree_add_text(tree, tvb, offset, length-2, "Proprietary value");

}
/*
 * 8.68	Transaction Identifier (TI)
 */
static void
dissect_gtpv2_ti(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_, guint8 instance _U_)
{

/* 5 to (n+4)	Transaction Identifier */
	    proto_tree_add_item(tree, hf_gtpv2_ti, tvb, 0, length, FALSE);

}

typedef struct _gtpv2_ie {
    int ie_type;
    void (*decode) (tvbuff_t *, packet_info *, proto_tree *, proto_item *, guint16, guint8, guint8);
} gtpv2_ie_t;

static const gtpv2_ie_t gtpv2_ies[] = {
    {GTPV2_IE_IMSI, dissect_gtpv2_imsi},
    {GTPV2_IE_CAUSE, dissect_gtpv2_cause},                           /* 2, Cause (without embedded offending IE) 8.4 */
    {GTPV2_REC_REST_CNT, dissect_gtpv2_recovery},                    /* 3, Recovery (Restart Counter) 8.5 */
                                                                     /* 4-50 Reserved for S101 interface Extendable / See 3GPP TS 29.276 [14] */
                                                                     /* 51-70 Reserved for Sv interface Extendable / See 3GPP TS 29.280 [15] */
    {GTPV2_APN, dissect_gtpv2_apn},                                  /* 71, Access Point Name (APN) 8.6 */
    {GTPV2_AMBR, dissect_gtpv2_ambr},                                /* 72, Aggregate Maximum Bit Rate (AMBR) */
    {GTPV2_EBI, dissect_gtpv2_ebi},                                  /* 73, EPS Bearer ID (EBI)  8.8 */
    {GTPV2_IP_ADDRESS, dissect_gtpv2_ip_address},                    /* 74, IP Address */
    {GTPV2_MEI, dissect_gtpv2_mei},                                  /* 74, Mobile Equipment Identity */
    {GTPV2_IE_MSISDN, dissect_gtpv2_msisdn},                         /* 76, MSISDN 8.11 */
    {GTPV2_INDICATION, dissect_gtpv2_ind},                           /* 77 Indication 8.12 */
    {GTPV2_PCO, dissect_gtpv2_pco},                                  /* 78 Protocol Configuration Options (PCO) 8.13 */
    {GTPV2_PAA, dissect_gtpv2_paa},                                  /* 79 PDN Address Allocation (PAA) 8.14 */
    {GTPV2_BEARER_QOS,dissect_gtpv2_bearer_qos},                     /* 80 Bearer Level Quality of Service (Bearer QoS) 8.15 */
    {GTPV2_IE_FLOW_QOS, dissect_gtpv2_flow_qos},                     /* 81 Flow Quality of Service (Flow QoS) 8.16 */
    {GTPV2_IE_RAT_TYPE, dissect_gtpv2_rat_type},                     /* 82, RAT Type  8.17 */
    {GTPV2_IE_SERV_NET, dissect_gtpv2_serv_net},                     /* 83, Serving Network 8.18 */
    {GTPV2_IE_BEARER_TFT, dissect_gtpv2_bearer_tft},                 /* 84, Bearer TFT 8.19 */
    {GTPV2_IE_TAD, dissect_gtpv2_tad},                               /* 85, Traffic Aggregate Description 8.20 */
    {GTPV2_IE_ULI, dissect_gtpv2_uli},                               /* 86, User Location Info (ULI) 8.22 */
    {GTPV2_IE_F_TEID, dissect_gtpv2_f_teid},                         /* 87, Fully Qualified Tunnel Endpoint Identifier (F-TEID) 8.23 */
    {GTPV2_IE_TMSI, dissect_gtpv2_tmsi},                             /* 88, TMSI 8.23 */
    {GTPV2_IE_GLOBAL_CNID, dissect_gtpv2_g_cn_id},                   /* 89, Global CN-Id 8.25 */
    {GTPV2_IE_S103PDF, dissect_gtpv2_s103pdf},                       /* 90, S103 PDN Data Forwarding Info (S103PDF) 8.25 */
    {GTPV2_IE_S1UDF, dissect_gtpv2_s1udf},                           /* 91, S1-U Data Forwarding (S1UDF) 8.26 */
    {GTPV2_IE_DEL_VAL, dissect_gtpv2_delay_value},                   /* 92, Delay Value 8.29 */
    {GTPV2_IE_BEARER_CTX,dissect_gtpv2_bearer_ctx},                  /* 93, Bearer Context  8.31 */
    {GTPV2_IE_CHAR_ID, dissect_gtpv2_charging_id},                   /* 94, Charging Id */
    {GTPV2_IE_CHAR_CHAR, dissect_gtpv2_char_char},                   /* 95 Charging Characteristic */
    {GTPV2_IE_TRA_INFO, dissect_gtpv2_tra_info},                     /* 96, Trace Information 8.31 */
    {GTPV2_BEARER_FLAG, dissect_gtpv2_bearer_flag},                  /* 97, Bearer Flag */
                                                                     /* 98, Void 8.33 */
    {GTPV2_IE_PDN_TYPE, dissect_gtpv2_pdn_type},                     /* 99, PDN Type */
    {GTPV2_IE_PTI, dissect_gtpv2_pti},                               /* 100, Procedure Transaction Id */
    {GTPV2_IE_DRX_PARAM, dissect_gtpv2_drx_param},                   /* 101, DRX Parameter 8.36 */
    {GTPV2_IE_UE_NET_CAPABILITY, dissect_gtpv2_ue_net_capability},   /* 102, UE network capability 8.37 */
    {GTPV2_IE_MM_CONTEXT_GSM_T, dissect_gtpv2_mm_context_gsm_t},     /* 103, MM Context 8.38 GSM Key and Triplets */
    {GTPV2_IE_MM_CONTEXT_UTMS_CQ, dissect_gtpv2_mm_context_utms_cq}, /* 104, MM Context 8.38 */
    {GTPV2_IE_MM_CONTEXT_GSM_CQ, dissect_gtpv2_mm_context_gsm_cq},   /* 105, MM Context 8.38 */
    {GTPV2_IE_MM_CONTEXT_UTMS_Q, dissect_gtpv2_mm_context_utms_q},   /* 106, MM Context 8.38 */
    {GTPV2_IE_MM_CONTEXT_EPS_QQ, dissect_gtpv2_mm_context_eps_qq},   /* 107, MM Context 8.38 */
    {GTPV2_IE_MM_CONTEXT_UTMS_QQ, dissect_gtpv2_mm_context_utms_qq}, /* 108, MM Context 8.38 */
	{GTPV2_IE_PDN_CONNECTION, dissect_gtpv2_PDN_conn},			     /* 109, PDN Connection */
    {GTPV2_IE_PDN_NUMBERS, dissect_gtpv2_pdn_numbers},               /* 110, PDN Numbers 8.40 */
    {GTPV2_IE_P_TMSI, dissect_gtpv2_p_tmsi},                         /* 111, P-TMSI 8.41 */
    {GTPV2_IE_P_TMSI_SIG, dissect_gtpv2_p_tmsi_sig},                 /* 112, P-TMSI Signature 8.42 */
    {GTPV2_IE_HOP_COUNTER, dissect_gtpv2_hop_counter},               /* 113, Hop Counter 8.43 */
    {GTPV2_IE_UE_TIME_ZONE, dissect_gtpv2_ue_time_zone},             /* 114, UE Time Zone */
    {GTPV2_IE_TRACE_REFERENCE, dissect_gtpv2_trace_reference},       /* 115, Trace Reference 8.45 */
    {GTPV2_IE_COMPLETE_REQUEST_MSG, dissect_complete_request_msg},   /* 116, Complete Request message 8.46 */
    {GTPV2_IE_GUTI, dissect_gtpv2_guti},                             /* 117, GUTI 8.47 */
	{GTPV2_IE_F_CONTAINER, dissect_gtpv2_F_container},		         /* 118, Fully Qualified Container (F-Container) */
	{GTPV2_IE_F_CAUSE, dissect_gtpv2_F_cause},				         /* 119, Fully Qualified Cause (F-Cause) */
    {GTPV2_IE_SEL_PLMN_ID, dissect_gtpv2_sel_plmn_id},               /* 120, Selected PLMN ID 8.50 */
	{GTPV2_IE_TARGET_ID, dissect_gtpv2_target_id},			         /* 121, Target Identification */
                                                                     /* 122, Void 8.52 */
    {GTPV2_IE_PKT_FLOW_ID, dissect_gtpv2_pkt_flow_id},               /* 123, Packet Flow ID 8.53 */
    {GTPV2_IE_RAB_CONTEXT, dissect_gtpv2_rab_context},               /* 124, RAB Context 8.54 */
    {GTPV2_IE_S_RNC_PDCP_CTX_INFO, dissect_gtpv2_s_rnc_pdcp_ctx_info},   /* 125, Source RNC PDCP context info 8.55 */
    {GTPV2_IE_UDP_S_PORT_NR, dissect_udp_s_port_nr},                     /* 126, UDP Source Port Number 8.56 */
    {GTPV2_IE_APN_RESTRICTION, dissect_gtpv2_apn_rest},                  /* 127, APN Restriction */
    {GTPV2_IE_SEL_MODE,dissect_gtpv2_selec_mode},					     /* 128 Selection Mode */
    {GTPV2_IE_SOURCE_IDENT, dissect_gtpv2_source_ident},                 /* 129, Source Identification 8.59 */
    {GTPV2_IE_BEARER_CONTROL_MODE,dissect_gtpv2_bearer_control_mode},	 /* 130 Bearer Control Mode*/
    {GTPV2_IE_CNG_REP_ACT ,dissect_gtpv2_cng_rep_act},					 /* 131 Change Reporting Action 8.61 */
    {GTPV2_IE_FQ_CSID, dissect_gtpv2_fq_csid},                           /* 132, Fully Qualified PDN Connection Set Identifier (FQ-CSID) 8.62 */
    {GTPV2_IE_CHANNEL_NEEDED, dissect_gtpv2_channel_needed},             /* 133, Channel Needed 8.63 */
    {GTPV2_IE_EMLPP_PRI, dissect_gtpv2_emlpp_pri},	                     /* 134, eMLPP Priority 8.64 */
    {GTPV2_IE_NODE_TYPE ,dissect_gtpv2_node_type},						 /* 135 Node Type 8.65 */
	{GTPV2_IE_FQDN, dissect_gtpv2_fqdn},								 /* 136 8.66 Fully Qualified Domain Name (FQDN) */
	{GTPV2_IE_TI, dissect_gtpv2_ti},									 /* 137 8.68	Transaction Identifier (TI) */
																	     /* 137-254 Spare. For future use. FFS */
	{GTPV2_IE_PRIVATE_EXT,dissect_gtpv2_private_ext},


    {0, dissect_gtpv2_unknown}
};



static void
dissect_gtpv2_ie_common(tvbuff_t * tvb, packet_info * pinfo _U_, proto_tree * tree, gint offset, guint8 message_type)
{
    proto_tree *ie_tree;
    proto_item *ti;
    tvbuff_t *ie_tvb;
    guint8 type, instance;
    guint16 length;
    int i;
    /*
     * Octets   8   7   6   5       4   3   2   1
     *  1       Type
     *  2-3     Length = n
     *  4       CR          Spare   Instance
     * 5-(n+4)  IE specific data
     */
    while(offset < (gint)tvb_reported_length(tvb)){
        /* Get the type and length */
        type = tvb_get_guint8(tvb,offset);
        length = tvb_get_ntohs(tvb, offset+1);
        ti = proto_tree_add_text(tree, tvb, offset, 4 + length, "%s : ", val_to_str(type, gtpv2_element_type_vals, "Unknown"));
        ie_tree = proto_item_add_subtree(ti, ett_gtpv2_ie);
        /* Octet 1 */
        proto_tree_add_item(ie_tree, hf_gtpv2_ie, tvb, offset, 1, FALSE);
        offset++;

        /*Octet 2 - 3 */
        proto_tree_add_item(ie_tree, hf_gtpv2_ie_len, tvb, offset, 2, FALSE);
        offset+=2;
        /* CR Spare Instance Octet 4*/
        proto_tree_add_item(ie_tree, hf_gtpv2_cr, tvb, offset, 1, FALSE);

        instance = tvb_get_guint8(tvb,offset)& 0x0f;
        proto_tree_add_item(ie_tree, hf_gtpv2_instance, tvb, offset, 1, FALSE);
        offset++;

        /* TODO: call IE dissector here */
        if(type==GTPV2_IE_RESERVED){
            /* Treat IE type zero specal as type zero is used to end the loop in the else branch */
            proto_tree_add_text(ie_tree, tvb, offset, length, "IE type Zero is Reserved and should not be used");
        }else{
            i = -1;
            /* Loop over the IE dissector list to se if we find an entry, the last entry will have ie_type=0 breaking the loop */
            while (gtpv2_ies[++i].ie_type){
                if (gtpv2_ies[i].ie_type == type)
                    break;
            }
            /* Just give the IE dissector the IE */
            ie_tvb = tvb_new_subset_remaining(tvb, offset);
            (*gtpv2_ies[i].decode) (ie_tvb, pinfo , ie_tree, ti, length, message_type, instance);
        }

        offset = offset + length;
    }
}

static void
dissect_gtpv2(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
    proto_tree *gtpv2_tree, *flags_tree;
    proto_item *ti, *tf;
    guint8 message_type, t_flag;
    int offset = 0;


    /* Currently we get called from the GTP dissector no need to check the version */
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "GTPv2");
    col_clear(pinfo->cinfo, COL_INFO);

    /* message type is in octet 2 */
    message_type = tvb_get_guint8(tvb,1);
    col_add_str(pinfo->cinfo, COL_INFO, val_to_str(message_type, gtpv2_message_type_vals, "Unknown"));


    proto_tree_add_item(tree, proto_gtpv2, tvb, offset, -1, FALSE);

    if (tree) {
        ti = proto_tree_add_text(tree, tvb, offset, -1, "%s", val_to_str(message_type, gtpv2_message_type_vals, "Unknown"));
        gtpv2_tree = proto_item_add_subtree(ti, ett_gtpv2);

        /* Control Plane GTP uses a variable length header. Control Plane GTP header
         * length shall be a multiple of 4 octets.
         * Figure 5.1-1 illustrates the format of the GTPv2-C Header.
         * Bits       8  7  6   5       4   3       2       1
         * Octets   1 Version   P       T   Spare   Spare   Spare
         *          2 Message Type
         *          3 Message Length (1st Octet)
         *          4 Message Length (2nd Octet)
         *  m-k(m+3)    If T flag is set to 1, then TEID shall be placed into octets 5-8.
         *              Otherwise, TEID field is not present at all.
         *  n-(n+2)   Sequence Number
         * (n+3)      Spare
         * Figure 5.1-1: General format of GTPv2 Header for Control Plane
         */
        tf = proto_tree_add_item(gtpv2_tree, hf_gtpv2_flags, tvb, offset, 1, FALSE);
        flags_tree = proto_item_add_subtree(tf, ett_gtpv2_flags);

        /* Octet 1 */
        t_flag = (tvb_get_guint8(tvb,offset) & 0x08)>>3;
        proto_tree_add_item(flags_tree, hf_gtpv2_version, tvb, offset, 1, FALSE);
        proto_tree_add_item(flags_tree, hf_gtpv2_p, tvb, offset, 1, FALSE);
        proto_tree_add_item(flags_tree, hf_gtpv2_t, tvb, offset, 1, FALSE);
        offset++;

        /* Octet 2 */
        proto_tree_add_item(gtpv2_tree, hf_gtpv2_message_type, tvb, offset, 1, FALSE);
        offset++;
        /* Octet 3 - 4 */
        proto_tree_add_item(gtpv2_tree, hf_gtpv2_msg_length, tvb, offset, 2, FALSE);
        offset+=2;

        if(t_flag){
            /* Tunnel Endpoint Identifier 4 octets */
            proto_tree_add_item(gtpv2_tree, hf_gtpv2_teid, tvb, offset, 4, FALSE);
            offset+=4;
        }
        /* Sequence Number 3 octets */
        proto_tree_add_item(gtpv2_tree, hf_gtpv2_seq, tvb, offset, 3, FALSE);
        offset+=3;

        /* Spare 1 octet */
        proto_tree_add_item(gtpv2_tree, hf_gtpv2_spare, tvb, offset, 1, FALSE);
        offset+=1;

        dissect_gtpv2_ie_common(tvb, pinfo, gtpv2_tree, offset, message_type);
    }


}
void proto_register_gtpv2(void)
{
    static hf_register_info hf_gtpv2[] = {
		{ &hf_gtpv2_reserved,
			{"Reserved bit(s)", "gtpv2.reserved",
				FT_UINT8, BASE_DEC, NULL, 0x0,
				"Reserved", HFILL }
		},
		{ &hf_gtpv2_spare_half_octet,
			{"Spare half octet", "gtpv2.spare_half_octet",
				FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }
		},
		{ &hf_gtpv2_spare_bits,
			{"Spare bit(s)", "gtpv2.spare_bits",
				FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }
		},
        {&hf_gtpv2_flags,
        {"Flags", "gtpv2.flags",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_version,
        {"Version", "gtpv2.version",
        FT_UINT8, BASE_DEC, NULL, 0xe0,
        NULL, HFILL}
        },
        {&hf_gtpv2_p,
        {"P", "gtpv2.p",
        FT_UINT8, BASE_DEC, NULL, 0x10,
        "If Piggybacked message is present or not", HFILL}
        },
        { &hf_gtpv2_t,
        {"T", "gtpv2.t",
        FT_UINT8, BASE_DEC, NULL, 0x08,
        "If TEID field is present or not", HFILL}
        },
        { &hf_gtpv2_message_type,
        {"Message Type", "gtpv2.message_type",
        FT_UINT8, BASE_DEC, VALS(gtpv2_message_type_vals), 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_msg_length,
        {"Message Length", "gtpv2.msg_lengt",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_teid,
        {"Tunnel Endpoint Identifier", "gtpv2.teid",
        FT_UINT32, BASE_DEC, NULL, 0x0,
        "TEID", HFILL}
        },
        { &hf_gtpv2_seq,
        {"Sequence Number", "gtpv2.seq",
        FT_UINT32, BASE_DEC, NULL, 0x0,
        "SEQ", HFILL}
        },
        { &hf_gtpv2_spare,
        {"Spare", "gtpv2.spare",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_ie,
        {"IE Type", "gtpv2.ie_type",
        FT_UINT8, BASE_DEC, VALS(gtpv2_element_type_vals), 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_ie_len,
        {"IE Length", "gtpv2.ie_len",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        "length of the information element excluding the first four octets", HFILL}
        },
        { &hf_gtpv2_cr,
        {"CR flag", "gtpv2.cr",
        FT_UINT8, BASE_DEC, NULL, 0xe0,
        NULL, HFILL}
        },
        { &hf_gtpv2_instance,
        {"Instance", "gtpv2.instance",
        FT_UINT8, BASE_DEC, NULL, 0x0f,
        NULL, HFILL}
        },
        {&hf_gtpv2_imsi,
        {"IMSI(International Mobile Subscriber Identity number)", "gtpv2.imsi",
        FT_STRING, BASE_NONE, NULL, 0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_ipv4_addr,
			{"IPv4 Address", "gtpv2.ipv4_addr",
				FT_IPv4, BASE_NONE, NULL, 0x0,
				NULL, HFILL}
		},
        { &hf_gtpv2_cause,
        {"Cause", "gtpv2.cause",
        FT_UINT8, BASE_DEC|BASE_EXT_STRING, &gtpv2_cause_vals_ext, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_cause_cs,
        {"CS (Cause Source)","gtpv2.cs",
        FT_BOOLEAN, 8, TFS(&gtpv2_cause_cs), 0x01,
        NULL, HFILL}
        },
		{ &hf_gtpv2_cause_bce,
        {"BCE (Bearer Context IE Error)","gtpv2.bce",
        FT_BOOLEAN, 8, NULL, 0x02,
        NULL, HFILL}
        },
		{ &hf_gtpv2_cause_pce,
        {"PCE (PDN Connection IE Error)","gtpv2.pce",
        FT_BOOLEAN, 8, NULL, 0x04,
        NULL, HFILL}
        },
		{ &hf_gtpv2_cause_off_ie_t,
        {"Type of the offending IE", "gtpv2.cause_off_ie_t",
        FT_UINT8, BASE_DEC, VALS(gtpv2_element_type_vals), 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_rec,
        {"Restart Counter", "gtpv2.rec",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_apn,
        {"APN (Access Point Name)", "gtpv2.apn",
        FT_STRING, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_ambr_up,
        {"AMBR Uplink (Aggregate Maximum Bit Rate for Uplink)", "gtpv2.ambr_up",
        FT_UINT32, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_ambr_down,
        {"AMBR Downlink(Aggregate Maximum Bit Rate for Downlink)", "gtpv2.ambr_down",
        FT_UINT32, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_ebi,
        {"EPS Bearer ID (EBI)", "gtpv2.ebi",
        FT_UINT8, BASE_DEC, NULL, 0x0f,
        NULL, HFILL}
        },
        { &hf_gtpv2_ip_address_ipv4,
        {"IP address IPv4", "gtpv2.ip_address_ipv4",
        FT_IPv4, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_ip_address_ipv6,
        {"IP address IPv6", "gtpv2.ip_address_ipv6",
        FT_IPv6, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_mei,
        {"MEI(Mobile Equipment Identity)", "gtpv2.mei",
        FT_STRING, BASE_NONE, NULL, 0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_pdn_numbers_nsapi,
			{"NSAPI", "gtpv2.pdn_numbers_nsapi",
				FT_UINT8, BASE_DEC, NULL, 0x0f, NULL, HFILL}
		},
		{ &hf_gtpv2_p_tmsi,
			{"Packet TMSI (P-TMSI)", "gtpv2.p_tmsi",
				FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
		},
		{ &hf_gtpv2_p_tmsi_sig,
			{"P-TMSI Signature", "gtpv2.p_tmsi_sig",
				FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}
		},
        {&hf_gtpv2_daf,
        {"DAF (Dual Address Bearer Flag)", "gtpv2.daf",
        FT_BOOLEAN, 8, NULL, 0x80, "DAF", HFILL}
        },
        {&hf_gtpv2_dtf,
        {"DTF (Direct Tunnel Flag)","gtpv2.dtf",
        FT_BOOLEAN, 8, NULL, 0x40, "DTF", HFILL}
        },
        {&hf_gtpv2_hi,
        {"HI (Handover Indication)", "gtpv2.hi",
        FT_BOOLEAN, 8, NULL, 0x20, "HI", HFILL}
        },
        {&hf_gtpv2_dfi,
        {"DFI (Direct Forwarding Indication)", "gtpv2.dfi",
        FT_BOOLEAN, 8, NULL, 0x10, "DFI", HFILL}
        },
        {&hf_gtpv2_oi,
        {"OI (Operation Indication)","gtpv2.oi",
        FT_BOOLEAN, 8, NULL, 0x08, "OI", HFILL}
        },
        {&hf_gtpv2_isrsi,
        {"ISRSI (Idle mode Signalling Reduction Supported Indication)", "gtpv2.isrsi",
        FT_BOOLEAN, 8, NULL, 0x04, "ISRSI", HFILL}
        },
        {&hf_gtpv2_israi,
        {"ISRAI (Idle mode Signalling Reduction Activation Indication)",    "gtpv2.israi",
        FT_BOOLEAN, 8, NULL, 0x02, "ISRAI", HFILL}
        },
        {&hf_gtpv2_sgwci,
        {"SGWCI (SGW Change Indication)", "gtpv2.sgwci",
        FT_BOOLEAN, 8, NULL, 0x01, "SGWCI", HFILL}
        },
        {&hf_gtpv2_pt,
        {"PT (Protocol Type)", "gtpv2.pt",
        FT_BOOLEAN, 8, NULL, 0x08, "PT", HFILL}
        },
        {&hf_gtpv2_tdi,
        {"TDI (Teardown Indication)", "gtpv2.tdi",
        FT_BOOLEAN, 8, NULL, 0x04, "TDI", HFILL}
        },
        {&hf_gtpv2_si,
        {"SI (Scope Indication)", "gtpv2.si",
        FT_BOOLEAN, 8, NULL, 0x02, "SI", HFILL}
        },
        {&hf_gtpv2_msv,
        {"MSV (MS Validated)", "gtpv2.msv",
        FT_BOOLEAN, 8, NULL, 0x01, "MSV", HFILL}
        },
        { &hf_gtpv2_pdn_type,
        {"PDN Type", "gtpv2.pdn_type",
        FT_UINT8, BASE_DEC, VALS(gtpv2_pdn_type_vals), 0x07,
        NULL, HFILL}
        },
		{ &hf_gtpv2_tra_info,
			{"Trace ID","gtpv2.tra_info",
				FT_STRING, BASE_NONE, NULL, 0x0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_tra_info_msc_momt_calls,
			{"MO and MT calls","gtpv2.tra_info_msc_momt_calls",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_msc_momt_sms,
			{"MO and MT SMS","gtpv2.tra_info_msc_momt_sms",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_msc_lu_imsi_ad,
			{"LU, IMSI attach, IMSI detach","gtpv2.tra_info_msc_lu_imsi_ad",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_msc_handovers,
			{"Handovers","gtpv2.tra_info_msc_handovers",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_msc_ss,
			{"SS","gtpv2.tra_info_msc_ss",
				FT_UINT8, BASE_DEC, NULL, 0x10,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_mgw_context,
			{"Context","gtpv2.tra_info_mgw_context",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"MGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_sgsn_pdp_context,
			{"PDP context","gtpv2.tra_info_sgsn_pdp_context",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_sgsn_momt_sms,
			{"MO and MT SMS","gtpv2.tra_info_sgsn_momt_sms",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_sgsn_rau_gprs_ad,
			{"RAU, GPRS attach, GPRS detach","gtpv2.tra_info_sgsn_rau_gprs_ad",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_sgsn_mbms,
			{"MBMS Context","gtpv2.tra_into_sgsn_mbms",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_sgsn_reserved,
			{"Reserved","gtpv2.",
				FT_UINT8, BASE_DEC, NULL, 0x0,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_ggsn_pdp,
			{"PDP Cpntext","gtpv2.tra_info_ggsn_pdp",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"GGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_ggsn_mbms,
			{"MBMS Context","gtpv2.tra_info_ggsn_mbms",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"GGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_bm_sc,
			{"MBMS Multicast service activation","gtpv2.tra_info_bm_sc",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"BM-SC", HFILL}
		},
		{ &hf_gtpv2_tra_info_mme_sgw_ss,
			{"Session setup","gtpv2.tra_info_mme_sgw_ss",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_mme_sgw_sr,
			{"Service Request","gtpv2.tra_info_mme_sgw_sr",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_mme_sgw_iataud,
			{"Initial Attach, Tracking area update, Detach","gtpv2.tra_info_mme_sgw_iataud",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_msc_s,
			{"MSC-S","gtpv2.tra_info_lne_msc_s",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_mgw,
			{"MGW","gtpv2.tra_info_lne_mgw",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_sgsn,
			{"SGSN","gtpv2.tra_info_lne_sgsn",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_ggsn,
			{"GGSN","gtpv2.tra_info_lne_ggsn",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_rnc,
			{"RNC","gtpv2.tra_info_lne_rnc",
				FT_UINT8, BASE_DEC, NULL, 0x10,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_bm_sc,
			{"BM-SC","gtpv2.tra_info_lne_bm_sc",
				FT_UINT8, BASE_DEC, NULL, 0x20,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_mme,
			{"MME","gtpv2.tra_info_lne_mme",
				FT_UINT8, BASE_DEC, NULL, 0x40,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_sgw,
			{"SGW","gtpv2.tra_info_lne_sgw",
				FT_UINT8, BASE_DEC, NULL, 0x80,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_pdn_gw,
			{"PDN GW","gtpv2.tra_info_lne_pdn_gw",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_lne_enb,
			{"eNB","gtpv2.tra_info_lne_enb",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"List of NE Types", HFILL}
		},
		{ &hf_gtpv2_tra_info_tdl,
			{"Trace Depth Length","gtpv2.tra_info_tdl",
				FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_a,
			{"A","gtpv2.tra_info_lmsc_a",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_lu,
			{"Iu","gtpv2.tra_info_lmsc_lu",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_mc,
			{"Mc","gtpv2.tra_info_lmsc_mc",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_map_g,
			{"MAP-G","gtpv2.tra_info_lmsc_map_g",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_map_b,
			{"MAP-B","gtpv2.tra_info_lmsc_map_b",
				FT_UINT8, BASE_DEC, NULL, 0x10,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_map_e,
			{"MAP-E","gtpv2.tra_info_lmsc_map_e",
				FT_UINT8, BASE_DEC, NULL, 0x20,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_map_f,
			{"MAP-F","gtpv2.tra_info_lmsc_map_f",
				FT_UINT8, BASE_DEC, NULL, 0x40,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_cap,
			{"CAP","gtpv2.tra_info_lmsc_cap",
				FT_UINT8, BASE_DEC, NULL, 0x80,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_map_d,
			{"MAP-D","gtpv2.tra_info_lmsc_map_d",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmsc_map_c,
			{"MAP-C","gtpv2.tra_info_lmsc_map_c",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"MSC Server", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmgw_mc,
			{"Mc","gtpv2.tra_info_lmgw_mc",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"MGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmgw_nb_up,
			{"Nb-UP","gtpv2.tra_info_lmgw_nb_up",
				FT_UINT8, BASE_DEC, NULL, 0x2,
				"MGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmgw_lu_up,
			{"Iu-UP","gtpv2.tra_info_lmgw_lu_up",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"MGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_gb,
			{"Gb","gtpv2.tra_info_lsgsn_gb",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_lu,
			{"Iu","gtpv2.tra_info_lsgsn_lu",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_gn,
			{"Gn","gtpv2.tra_info_lsgsn_gn",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_map_gr,
			{"MAP-Gr","gtpv2.tra_info_lsgsn_map_gr",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_map_gd,
			{"MAP-Gd","gtpv2.tra_info_lsgsn_map_gd",
				FT_UINT8, BASE_DEC, NULL, 0x10,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_map_gf,
			{"MAP-Gf","gtpv2.tra_info_lsgsn_map_gf",
				FT_UINT8, BASE_DEC, NULL, 0x20,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_gs,
			{"Gs","gtpv2.tra_info_lsgsn_gs",
				FT_UINT8, BASE_DEC, NULL, 0x40,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgsn_ge,
			{"Ge","gtpv2.tra_info_lsgsn_ge",
				FT_UINT8, BASE_DEC, NULL, 0x80,
				"SGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lggsn_gn,
			{"Gn","gtpv2.tra_info_lggsn_gn",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"GGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lggsn_gi,
			{"Gi","gtpv2.tra_info_lggsn_gi",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"GGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lggsn_gmb,
			{"Gmb","gtpv2.tra_info_lggsn_gmb",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"GGSN", HFILL}
		},
		{ &hf_gtpv2_tra_info_lrnc_lu,
			{"Iu","gtpv2.tra_info_lrnc_lu",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"RNC", HFILL}
		},
		{ &hf_gtpv2_tra_info_lrnc_lur,
			{"Iur","gtpv2.tra_info_lrnc_lur",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"RNC", HFILL}
		},
		{ &hf_gtpv2_tra_info_lrnc_lub,
			{"Iub","gtpv2.tra_info_lrnc_lub",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"RNC", HFILL}
		},
		{ &hf_gtpv2_tra_info_lrnc_uu,
			{"Uu","gtpv2.tra_info_lrnc_uu",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"RNC", HFILL}
		},
		{ &hf_gtpv2_tra_info_lbm_sc_gmb,
			{"Gmb","gtpv2.tra_info_lbm_sc_gmb",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"BM-SC", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmme_s1_mme,
			{"S1-MME","gtpv2.tra_info_lmme_s1_mme",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmme_s3,
			{"S3","gtpv2.tra_info_lmme_s3",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmme_s6a,
			{"S6a","gtpv2.tra_info_lmme_s6a",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmme_s10,
			{"S10","gtpv2.tra_info_lmme_s10",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_lmme_s11,
			{"S11","gtpv2.tra_info_lmme_s11",
				FT_UINT8, BASE_DEC, NULL, 0x10,
				"MME", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgw_s4,
			{"S4","gtpv2.tra_info_lsgw_s4",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"SGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgw_s5,
			{"S5","gtpv2.tra_info_lsgw_s5",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"SGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgw_s8b,
			{"S8b","gtpv2.tra_info_lsgw_s8b",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"SGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lsgw_s11,
			{"S11","gtpv2.tra_info_lsgw_s11",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"SGW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_s2a,
			{"S2a","gtpv2.tra_info_lpdn_gw_s2a",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_s2b,
			{"S2b","gtpv2.tra_info_lpdn_gw_s2b",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_s2c,
			{"S2c","gtpv2.tra_info_lpdn_gw_s2c",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_s5,
			{"S5","gtpv2.tra_info_lpdn_gw_s5",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_s6c,
			{"S6c","gtpv2.tra_info_lpdn_gw_s6c",
				FT_UINT8, BASE_DEC, NULL, 0x10,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_gx,
			{"Gx","gtpv2.tra_info_lpdn_gw_gx",
				FT_UINT8, BASE_DEC, NULL, 0x20,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_s8b,
			{"S8b","gtpv2.tra_info_lpdn_gw_s8b",
				FT_UINT8, BASE_DEC, NULL, 0x40,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lpdn_gw_sgi,
			{"SGi","gtpv2.tra_info_lpdn_gw_sgi",
				FT_UINT8, BASE_DEC, NULL, 0x80,
				"PDN GW", HFILL}
		},
		{ &hf_gtpv2_tra_info_lenb_s1_mme,
			{"S1-MME","gtpv2.tra_info_lenb_s1_mme",
				FT_UINT8, BASE_DEC, NULL, 0x01,
				"eNB", HFILL}
		},
		{ &hf_gtpv2_tra_info_lenb_x2,
			{"X2","gtpv2.tra_info_lenb_x2",
				FT_UINT8, BASE_DEC, NULL, 0x02,
				"eNB", HFILL}
		},
		{ &hf_gtpv2_tra_info_lenb_uu,
			{"Uu","gtpv2.tra_info_lenb_uu",
				FT_UINT8, BASE_DEC, NULL, 0x04,
				"eNB", HFILL}
		},
        { &hf_gtpv2_pdn_ipv4,
        {"PDN Address and Prefix(IPv4)", "gtpv2.pdn_addr_and_prefix.ipv4",
        FT_IPv4, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_pdn_ipv6_len,
        {"IPv6 Prefix Length", "gtpv2.pdn_ipv6_len",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_pdn_ipv6,
        {"PDN Address and Prefix(IPv6)", "gtpv2.pdn_addr_and_prefix.ipv6",
        FT_BYTES, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_pvi,
        {"PVI (Pre-emption Vulnerability)", "gtpv2.bearer_qos_pvi",
        FT_BOOLEAN, 8, NULL, 0x01,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_pl,
        {"PL (Priority Level)", "gtpv2.bearer_qos_pl",
        FT_UINT8, BASE_DEC, NULL, 0x3c,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_pci,
        {"PCI (Pre-emption Capability)", "gtpv2.bearer_qos_pci",
        FT_BOOLEAN, 8, NULL, 0x40,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_label_qci,
        {"Label (QCI)", "gtpv2.bearer_qos_label_qci",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_mbr_up,
        {"Maximum Bit Rate For Uplink", "gtpv2.bearer_qos_mbr_up",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_mbr_down,
        {"Maximum Bit Rate For Downlink", "gtpv2.bearer_qos_mbr_down",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_gbr_up,
        {"Guaranteed Bit Rate For Uplink", "gtpv2.bearer_qos_gbr_up",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_qos_gbr_down,
        {"Guaranteed Bit Rate For Downlink", "gtpv2.bearer_qos_gbr_down",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_flow_qos_label_qci,
        {"Label (QCI)", "gtpv2.flow_qos_label_qci",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_flow_qos_mbr_up,
        {"Maximum Bit Rate For Uplink", "gtpv2.flow_qos_mbr_up",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_flow_qos_mbr_down,
        {"Maximum Bit Rate For Downlink", "gtpv2.flow_qos_mbr_down",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_flow_qos_gbr_up,
        {"Guaranteed Bit Rate For Uplink", "gtpv2.flow_qos_gbr_up",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_flow_qos_gbr_down,
        {"Guaranteed Bit Rate For Downlink", "gtpv2.flow_qos_gbr_down",
        FT_UINT64, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_rat_type,
        {"RAT Type", "gtpv2.rat_type",
        FT_UINT8, BASE_DEC|BASE_EXT_STRING, &gtpv2_rat_type_vals_ext, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_ecgi_flg,
        {"ECGI Present Flag)", "gtpv2.uli_ecgi_flg",
        FT_BOOLEAN, 8, NULL, GTPv2_ULI_ECGI_MASK,
        NULL, HFILL}
        },
		{ &hf_gtpv2_uli_lai_flg,
        {"LAI Present Flag)", "gtpv2.uli_lai_flg",
        FT_BOOLEAN, 8, NULL, GTPv2_ULI_LAI_MASK,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_tai_flg,
        {"TAI Present Flag)", "gtpv2.uli_tai_flg",
        FT_BOOLEAN, 8, NULL, GTPv2_ULI_TAI_MASK,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_rai_flg,
        {"RAI Present Flag)", "gtpv2.uli_rai_flg",
        FT_BOOLEAN, 8, NULL, GTPv2_ULI_RAI_MASK,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_sai_flg,
        {"SAI Present Flag)", "gtpv2.uli_sai_flg",
        FT_BOOLEAN, 8, NULL, GTPv2_ULI_SAI_MASK,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_cgi_flg,
        {"CGI Present Flag)", "gtpv2.uli_cgi_flg",
        FT_BOOLEAN, 8, NULL, GTPv2_ULI_CGI_MASK,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_cgi_lac,
        {"Location Area Code", "gtpv2.uli_cgi_lac",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_cgi_ci,
        {"Cell Identity", "gtpv2.uli_cgi_ci",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_sai_lac,
        {"Location Area Code", "gtpv2.uli_sai_lac",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_sai_sac,
        {"Service Area Code", "gtpv2.uli_sai_sac",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_rai_lac,
        {"Location Area Code", "gtpv2.uli_rai_lac",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_rai_rac,
        {"Routing Area Code", "gtpv2.uli_rai_rac",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_uli_tai_tac,
        {"Tracking Area Code", "gtpv2.uli_tai_tac",
        FT_UINT16, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_uli_ecgi_eci,
        {"ECI (E-UTRAN Cell Identifier)", "gtpv2.uli_ecgi_eci",
        FT_UINT32, BASE_HEX, NULL, 0x0,
        NULL, HFILL}
        },
		{&hf_gtpv2_uli_lai_lac,
        {"Location Area Code (LAC)", "gtpv2.uli_lai_lac",
        FT_UINT16, BASE_HEX, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_uli_ecgi_eci_spare,
        {"Spare", "gtpv2.uli_ecgi_eci_spare",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_nsapi,
        {"NSAPI", "gtpv2.nsapi",
        FT_UINT8, BASE_DEC, NULL, 0x0f,
        NULL, HFILL}
        },
        {&hf_gtpv2_f_teid_v4,
        {"V4", "gtpv2.f_teid_v4",
        FT_BOOLEAN, 8, TFS(&gtpv2_f_teid_v4_vals), 0x80,
        NULL, HFILL}
        },
        {&hf_gtpv2_f_teid_v6,
        {"V6", "gtpv2.f_teid_v6",
        FT_BOOLEAN, 8, TFS(&gtpv2_f_teid_v6_vals), 0x40,
        NULL, HFILL}
        },
        {&hf_gtpv2_f_teid_interface_type,
        {"Interface Type", "gtpv2.f_teid_interface_type",
        FT_UINT8, BASE_DEC|BASE_EXT_STRING, &gtpv2_f_teid_interface_type_vals_ext, 0x1f,
        NULL , HFILL}
        },
        {&hf_gtpv2_f_teid_gre_key,
        {"TEID/GRE Key", "gtpv2.f_teid_gre_key",
        FT_UINT32, BASE_DEC, NULL, 0x0,
        NULL , HFILL}
        },
        { &hf_gtpv2_f_teid_ipv4,
        {"F-TEID IPv4", "gtpv2.f_teid_ipv4",
        FT_IPv4, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_f_teid_ipv6,
        {"F-TEID IPv6", "gtpv2.f_teid_ipv6",
        FT_IPv6, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_tmsi,
        {"TMSI", "gtpv2.tmsi",
        FT_UINT32, BASE_HEX, NULL, 0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_hsgw_addr_f_len,
        {"HSGW Address for forwarding Length", "gtpv2.hsgw_addr_f_len",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_hsgw_addr_ipv4,
        {"HSGW Address for forwarding", "gtpv2.hsgw_addr_ipv4",
        FT_IPv4, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_hsgw_addr_ipv6,
        {"HSGW Address for forwarding", "gtpv2.hsgw_addr_ipv6",
        FT_IPv6, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_gre_key,
        {"GRE Key", "gtpv2.gre_key",
        FT_UINT32, BASE_DEC, NULL, 0x0,
        NULL , HFILL}
        },
        { &hf_gtpv2_sgw_addr_ipv4,
        {"Serving GW Address", "gtpv2.sgw_addr_ipv4",
        FT_IPv4, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_sgw_addr_ipv6,
        {"Serving GW Address", "gtpv2.sgw_addr_ipv6",
        FT_IPv6, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_sgw_s1u_teid,
        {"Serving GW S1-U TEID", "gtpv2.sgw_s1u_teid",
        FT_UINT32, BASE_HEX, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_delay_value,
        {"Delay Value (In integer multiples of 50 milliseconds or zero)", "gtpv2.delay_value",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_charging_id,
        {"Charging id", "gtpv2.charging_id",
        FT_UINT32, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_charging_characteristic,
        {"Charging Characteristic", "gtpv2.charging_characteristic",
        FT_UINT16, BASE_HEX, NULL, 0xffff,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_flag_ppc,
            {"PPC (Prohibit Payload Compression)", "gtpv2.bearer_flag.ppc",
				FT_BOOLEAN, 8, NULL, 0x01,
				NULL, HFILL}
        },
        {&hf_gtpv2_bearer_flag_vb,
        {"VB (Voice Bearer)", "gtpv2.bearer_flag.vb",
        FT_BOOLEAN, 8, NULL, 0x02,
        NULL, HFILL}
        },
        {&hf_gtpv2_pti,
        {"Procedure Transaction Id", "gtpv2.pti",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
		/* MM Context */
		{ &hf_gtpv2_mm_context_sm,
			{"Security Mode", "gtpv2.mm_context_sm",
				FT_UINT8, BASE_DEC, VALS(gtpv2_mm_context_security_mode), 0xe0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_nhi,
			{"NHI(Next Hop Indicator)", "gtpv2.mm_context_nhi",
				FT_BOOLEAN, 8, TFS(&gtpv2_nhi_vals), 0x10,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_drxi,
			{"DRXI", "gtpv2.mm_context_drxi",
				FT_UINT8, BASE_DEC, NULL, 0x08,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_cksn,
			{"CKSN", "gtpv2.mm_context_cksn",
				FT_UINT8, BASE_DEC, NULL, 0x07,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_cksn_ksi,
			{"CKSN/KSI", "gtpv2.mm_context_cksn_ksi",
				FT_UINT8, BASE_DEC, NULL, 0x07,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_ksi_a,
			{"KSI_asme", "gtpv2.mm_context_ksi_a",
				FT_UINT8, BASE_DEC, NULL, 0x07,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_nr_tri,
			{"Number of Triplet", "gtpv2.mm_context_nr_tri",
				FT_UINT8, BASE_DEC, NULL, 0xe0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_unipa,
			{"Used NAS integrity protection algorithm", "gtpv2.mm_context_unipa",
				FT_UINT8, BASE_DEC, VALS(gtpv2_mm_context_unipa_vals), 0x70,
				NULL, HFILL}
		},

		{ &hf_gtpv2_mm_context_unc,
			{"Used NAS Cipher", "gtpv2.mm_context_unc",
				FT_UINT8, BASE_DEC, VALS(gtpv2_mm_context_unc_vals), 0x0f,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_nas_dl_cnt,
			{"NAS Downlink Count", "gtpv2.mm_context_nas_dl_cnt",
				FT_UINT24, BASE_DEC, NULL, 0x0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_nas_ul_cnt,
			{"NAS Uplink Count", "gtpv2.mm_context_nas_ul_cnt",
				FT_UINT24, BASE_DEC, NULL, 0x0,
				NULL, HFILL}
		},

		{ &hf_gtpv2_mm_context_ksi,
			{"KSI", "gtpv2.mm_context_ksi",
				FT_UINT8, BASE_DEC, NULL, 0x07,
				NULL, HFILL}
		},
		{ &hf_gtpv2_mm_context_nr_qui,
			{"Number of Quintuplets", "gtpv2.mm_context_nr_qui",
				FT_UINT8, BASE_DEC, NULL, 0xe0,
				NULL, HFILL}
		},

		{ &hf_gtpv2_mm_context_nr_qua,
			{"Number of Quadruplet", "gtpv2.mm_context_nr_qua",
				FT_UINT8, BASE_DEC, NULL, 0x1c,
				NULL, HFILL}
		},
        {&hf_gtpv2_ue_time_zone_dst,
        {"Daylight Saving Time","gtpv2.ue_time_zone_dst",
        FT_UINT8, BASE_DEC, VALS(gtpv2_ue_time_zone_dst_vals),0x03,
        NULL, HFILL}
        },
		{ &hf_gtpv2_fq_csid_type,
			{"Node-ID Type", "gtpv2.fq_csid_type",
				FT_UINT8, BASE_DEC, NULL, 0xf0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_fq_csid_nr,
			{"Number of CSIDs", "gtpv2.fq_csid_nr",
				FT_UINT8, BASE_DEC, NULL, 0x0f,
				NULL, HFILL}
		},
		{ &hf_gtpv2_fq_csid_ipv4,
			{"Node-ID (IPv4)", "gtpv2.fq_csid_ipv4",
				FT_IPv4, BASE_NONE, NULL, 0x0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_fq_csid_ipv6,
			{"Node-ID (IPv6)", "gtpv2.fq_csid_ipv6",
				FT_IPv6, BASE_NONE, NULL, 0x0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_fq_csid_id,
			{"CSID", "gtpv2.fq_csid_id",
				FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL}
		},
		{ &hf_gtpv2_complete_req_msg_type,
        {"Complete Request Message Type","gtpv2.complete_req_msg_type",
        FT_UINT8, BASE_DEC, VALS(gtpv2_complete_req_msg_type_vals),0x0,
        NULL, HFILL}
        },
		{&hf_gtpv2_mme_grp_id,
        {"MME Group ID","gtpv2.mme_grp_id",
        FT_UINT16, BASE_DEC, NULL,0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_mme_code,
        {"MME Code","gtpv2.mme_code",
        FT_UINT8, BASE_DEC, NULL,0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_m_tmsi,
        {"M-TMSI","gtpv2.m_tmsi",
        FT_BYTES, BASE_NONE, NULL,0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_container_type,
        {"Container Type","gtpv2.container_type",
        FT_UINT8, BASE_DEC, VALS(gtpv2_container_type_vals),0x0f,
        NULL, HFILL}
        },
		{ &hf_gtpv2_cause_type,
        {"Cause Type","gtpv2.cause_type",
        FT_UINT8, BASE_DEC|BASE_EXT_STRING, &gtpv2_cause_type_vals_ext,0x0f,
        NULL, HFILL}
        },
		{ &hf_gtpv2_CauseRadioNetwork,
        {"Radio Network Layer Cause","gtpv2.CauseRadioNetwork",
        FT_UINT8, BASE_DEC, VALS(&s1ap_CauseRadioNetwork_vals),0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_CauseTransport,
        {"Transport Layer Cause","gtpv2.CauseTransport",
        FT_UINT8, BASE_DEC, VALS(&s1ap_CauseTransport_vals),0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_CauseNas,
        {"NAS Cause","gtpv2.CauseNas",
        FT_UINT8, BASE_DEC, VALS(&s1ap_CauseNas_vals),0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_CauseMisc,
        {"Miscellaneous Cause","gtpv2.CauseMisc",
        FT_UINT8, BASE_DEC, VALS(&s1ap_CauseMisc_vals),0x0,
        NULL, HFILL}
        },
		{ &hf_gtpv2_target_type,
        {"Target Type","gtpv2.target_type",
        FT_UINT8, BASE_DEC|BASE_EXT_STRING, &gtpv2_target_type_vals_ext,0x0,
        NULL, HFILL}
        },
		{&hf_gtpv2_macro_enodeb_id,
        {"Macro eNodeB ID","gtpv2.macro_enodeb_id",
        FT_UINT24, BASE_HEX, NULL,0x0fffff,
        NULL, HFILL}
        },
		{ &hf_gtpv2_CauseProtocol,
        {"Protocol Cause","gtpv2.CauseProtocol",
        FT_UINT8, BASE_DEC, VALS(&s1ap_CauseProtocol_vals),0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_apn_rest,
        {"APN Restriction", "gtpv2.apn_rest",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_selec_mode,
        {"Selection Mode","gtpv2.selec_mode",
        FT_UINT8, BASE_DEC, VALS(gtpv2_selec_mode_vals),0x03,
        NULL, HFILL}
        },
		{ &hf_gtpv2_source_type,
        {"Source Type", "gtpv2.source_type",
        FT_UINT8, BASE_DEC, NULL, 0x0,
        NULL, HFILL}
        },
        {&hf_gtpv2_bearer_control_mode,
        {"Bearer Control Mode","gtpv2.bearer_control_mode",
        FT_UINT8, BASE_DEC, VALS(gtpv2_bearer_control_mode_vals),0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_cng_rep_act,
        {"Change Reporting Action", "gtpv2.cng_rep_act",
        FT_UINT8, BASE_DEC, VALS(gtpv2_cng_rep_act_vals), 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_node_type,
        {"Node Type", "gtpv2.node_type",
        FT_UINT8, BASE_DEC, VALS(gtpv2_node_type_vals), 0x0,
        NULL, HFILL}
        },
		{&hf_gtpv2_fqdn,
        {"FQDN", "gtpv2.fqdn",
        FT_STRING, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_enterprise_id,
        {"Enterprise ID", "gtpv2.enterprise_id",
        FT_UINT16, BASE_DEC|BASE_EXT_STRING, &sminmpec_values_ext, 0x0,
        NULL, HFILL}
        },
        { &hf_gtpv2_address_digits,
            { "Address digits", "gtpv2.address_digits",
            FT_STRING, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
		{ &hf_gtpv2_ti,
        {"Transaction Identifier", "gtpv2.ti",
        FT_BYTES, BASE_NONE, NULL, 0x0,
        NULL, HFILL}
        },

     };

    static gint *ett_gtpv2_array[] = {
        &ett_gtpv2,
        &ett_gtpv2_flags,
        &ett_gtpv2_ie,
		&ett_gtpv2_uli_flags,
		&ett_gtpv2_uli_field,
        &ett_gtpv2_bearer_ctx,
		&ett_gtpv2_PDN_conn,
		&ett_gtpv2_mm_context_flag,
        &ett_gtpv2_pdn_numbers_nsapi,
        &ett_gtpv2_tra_info_trigg_msc_server,
        &ett_gtpv2_tra_info_trigg_mgw,
        &ett_gtpv2_tra_info_trigg_sgsn,
        &ett_gtpv2_tra_info_trigg_ggsn,
        &ett_gtpv2_tra_info_trigg_bm_sc,
		&ett_gtpv2_tra_info_trigg_sgw_mme,
		&ett_gtpv2_tra_info_interfaces,
		&ett_gtpv2_tra_info_interfaces_imsc_server,
		&ett_gtpv2_tra_info_interfaces_lmgw,
		&ett_gtpv2_tra_info_interfaces_lsgsn,
		&ett_gtpv2_tra_info_interfaces_lggsn,
		&ett_gtpv2_tra_info_interfaces_lrnc,
		&ett_gtpv2_tra_info_interfaces_lbm_sc,
		&ett_gtpv2_tra_info_interfaces_lmme,
		&ett_gtpv2_tra_info_interfaces_lsgw,
		&ett_gtpv2_tra_info_interfaces_lpdn_gw,
		&ett_gtpv2_tra_info_interfaces_lpdn_lenb,

    };

    proto_gtpv2 = proto_register_protocol("GPRS Tunneling Protocol V2", "GTPv2", "gtpv2");
    proto_register_field_array(proto_gtpv2, hf_gtpv2, array_length(hf_gtpv2));
    proto_register_subtree_array(ett_gtpv2_array, array_length(ett_gtpv2_array));
    /* AVP Code: 22 3GPP-User-Location-Info */
    dissector_add_uint("diameter.3gpp", 22, new_create_dissector_handle(dissect_diameter_3gpp_uli, proto_gtpv2));

    register_dissector("gtpv2", dissect_gtpv2, proto_gtpv2);
}

void
proto_reg_handoff_gtpv2(void)
{
	nas_eps_handle = find_dissector("nas-eps");
}
