path: root/epan/dissectors/asn1/nbap/packet-nbap-template.c

/* packet-nbap-template.c
 * Routines for UMTS Node B Application Part(NBAP) packet dissection
 * Copyright 2005, 2009 Anders Broman <anders.broman@ericsson.com>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Ref: 3GPP TS 25.433 version 6.6.0 Release 6
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/sctpppids.h>
#include <epan/asn1.h>
#include <epan/conversation.h>
#include <epan/expert.h>
#include <epan/prefs.h>
#include <epan/uat.h>

#include <wsutil/ws_printf.h> /* ws_g_warning */

#include "packet-per.h"
#include "packet-isup.h"
#include "packet-umts_fp.h"
#include "packet-umts_mac.h"
#include "packet-rrc.h"
#include "packet-umts_rlc.h"
#include "packet-nbap.h"

#ifdef _MSC_VER
/* disable: "warning C4146: unary minus operator applied to unsigned type, result still unsigned" */
#pragma warning(disable:4146)
#endif

#define PNAME  "UTRAN Iub interface NBAP signalling"
#define PSNAME "NBAP"
#define PFNAME "nbap"


#define NBAP_IGNORE_PORT 255

/* Debug */
#define DEBUG_NBAP 0
#if DEBUG_NBAP
#include <epan/to_str.h>
#define nbap_debug(...) ws_g_warning(__VA_ARGS__)
#else
#define nbap_debug(...)
#endif

void proto_register_nbap(void);
void proto_reg_handoff_nbap(void);

/* Protocol Handles */
static dissector_handle_t fp_handle;

#include "packet-nbap-val.h"

/* Initialize the protocol and registered fields */
static int proto_nbap = -1;
static int hf_nbap_transportLayerAddress_ipv4 = -1;
static int hf_nbap_transportLayerAddress_ipv6 = -1;
static int hf_nbap_transportLayerAddress_nsap = -1;

#include "packet-nbap-hf.c"

/* Initialize the subtree pointers */
static int ett_nbap = -1;
static int ett_nbap_TransportLayerAddress = -1;
static int ett_nbap_TransportLayerAddress_nsap = -1;
static int ett_nbap_ib_sg_data = -1;

#include "packet-nbap-ett.c"

static expert_field ei_nbap_no_find_comm_context_id = EI_INIT;
static expert_field ei_nbap_no_find_port_info = EI_INIT;
static expert_field ei_nbap_no_set_comm_context_id = EI_INIT;
static expert_field ei_nbap_hsdsch_entity_not_specified = EI_INIT;

extern int proto_fp;

static dissector_handle_t nbap_handle;

/*
 * Structure to hold Setup Request/Response message conversation
 * we add all src add/port declared in SetupRequest msg
 * to match it with dst add/port declared in SetupResponse msg
 * so we gonna have conversation with exact match (src and dst addr and port)
 */
typedef struct nbap_setup_conv
{
  guint32 transaction_id;
  guint32 dd_mode;
  guint32 channel_id;
  guint32 request_frame_number;
  address addr;
  guint32 port;
  umts_fp_conversation_info_t *umts_fp_conversation_info;
  conversation_t *conv;
}nbap_setup_conv_t;

/*
 * Hash table to manage Setup Request/Response message conversation
 * we can look in table for proper conversation
 */
static wmem_map_t *nbap_setup_conv_table;

/*
 * Structure to build information needed to dissect the FP flow beeing set up.
 */
struct _nbap_msg_info_for_fp
{
  guint32 ProcedureCode;
  guint32 ddMode;
  gboolean is_uplink;
  gint channel;                       /* see definitions in packet-umts_fp.h Channel types */
  guint8  dch_crc_present;            /* 0=No, 1=Yes, 2=Unknown */
};

typedef struct
{
  gint num_dch_in_flow;
  gint next_dch;
  gint num_ul_chans;
  gint ul_chan_tf_size[MAX_FP_CHANS];
  gint ul_chan_num_tbs[MAX_FP_CHANS];
  gint num_dl_chans;
  gint dl_chan_tf_size[MAX_FP_CHANS];
  gint dl_chan_num_tbs[MAX_FP_CHANS];
}nbap_dch_channel_info_t;

/* Struct to collect E-DCH data in a packet
 * As the address data comes before the ddi entries
 * we save the address to be able to find the conversation and update the
 * conversation data.
 */
typedef struct
{
  address crnc_address;
  guint16 crnc_port;
  gint no_ddi_entries;
  guint8 edch_ddi[MAX_EDCH_DDIS];
  guint edch_macd_pdu_size[MAX_EDCH_DDIS];
  guint8 edch_type;  /* 1 means T2 */
  guint8 lchId[MAX_EDCH_DDIS]; /*Logical channel ids.*/
} nbap_edch_channel_info_t;


typedef struct
{
  guint32 crnc_address;
  guint16 crnc_port[maxNrOfEDCHMACdFlows];
} nbap_edch_port_info_t;

typedef struct
{
  address crnc_address;
  guint16 crnc_port;
  enum fp_rlc_mode rlc_mode;
  guint32 hsdsch_physical_layer_category;
  guint8 entity;  /* "ns" means type 1 and "ehs" means type 2, type 3 == ?*/
} nbap_hsdsch_channel_info_t;

typedef struct
{
 address crnc_address;
 guint16 crnc_port;
 enum fp_rlc_mode rlc_mode;
} nbap_common_channel_info_t;

/*Stuff for mapping NodeB-Comuncation Context ID to CRNC Communication Context ID*/
typedef struct com_ctxt_{
  /*guint   nodeb_context;*/
  guint crnc_context;
  guint frame_num;
}nbap_com_context_id_t;

enum TransportFormatSet_type_enum
{
  NBAP_DCH_UL,
  NBAP_DCH_DL,
  NBAP_CPCH,
  NBAP_FACH,
  NBAP_PCH
};

/* Global Variables */
static guint32	transportLayerAddress_ipv4;
static guint16	BindingID_port;
static guint32	ul_scrambling_code;
static guint32	com_context_id;
static int cfn;
gint g_num_dch_in_flow;
gint g_dch_ids_in_flow_list[maxNrOfTFs];
gint hsdsch_macdflow_ids[maxNrOfMACdFlows];
gint hrnti;
guint node_b_com_context_id;
static wmem_tree_t* edch_flow_port_map = NULL;
static guint32 ProcedureCode;
static guint32 ProtocolIE_ID;
static guint32 ddMode;
static const gchar *ProcedureID;
static guint32 TransactionID;
static guint32 t_dch_id;
static guint32 dch_id;
static guint32 prev_dch_id;
static guint32 commonphysicalchannelid;
static guint32 e_dch_macdflow_id;
static guint32 hsdsch_macdflow_id=3;
static guint32 e_dch_ddi_value;
static guint32 logical_channel_id;
static guint32 common_macdflow_id;
static guint32 MACdPDU_Size;
static guint32 commontransportchannelid;
static guint num_items;
static gint paging_indications;
static guint32 ib_type;
static guint32 segment_type;
wmem_tree_t *nbap_scrambling_code_crncc_map = NULL;
wmem_tree_t *nbap_crncc_urnti_map = NULL;
enum TransportFormatSet_type_enum transportFormatSet_type;
gboolean crcn_context_present = FALSE;
static wmem_tree_t* com_context_map;
nbap_dch_channel_info_t nbap_dch_chnl_info[256];
nbap_edch_channel_info_t nbap_edch_channel_info[maxNrOfEDCHMACdFlows];
nbap_hsdsch_channel_info_t nbap_hsdsch_channel_info[maxNrOfMACdFlows];
nbap_common_channel_info_t nbap_common_channel_info[maxNrOfMACdFlows];	/*TODO: Fix this!*/
struct _nbap_msg_info_for_fp g_nbap_msg_info_for_fp;

/* This table is used externally from FP, MAC and such, TODO: merge this with
 * lch_contents[] */
guint8 lchId_type_table[]= {
  MAC_CONTENT_UNKNOWN,  /* Shouldn't happen*/
  MAC_CONTENT_DCCH,  /* 1 to 4 SRB => DCCH*/
  MAC_CONTENT_DCCH,
  MAC_CONTENT_DCCH,
  MAC_CONTENT_DCCH,
  MAC_CONTENT_CS_DTCH,  /* 5 to 7 Conv CS speech => ?*/
  MAC_CONTENT_CS_DTCH,
  MAC_CONTENT_CS_DTCH,
  MAC_CONTENT_DCCH, /* 8 SRB => DCCH*/
  MAC_CONTENT_PS_DTCH,  /* 9 maps to DTCH*/
  MAC_CONTENT_UNKNOWN,  /* 10 Conv CS unknown*/
  MAC_CONTENT_PS_DTCH,  /* 11 Interactive PS => DTCH*/
  MAC_CONTENT_PS_DTCH,  /* 12 Streaming PS => DTCH*/
  MAC_CONTENT_CS_DTCH,  /* 13 Streaming CS*/
  MAC_CONTENT_PS_DTCH,  /* 14 Interactive PS => DTCH*/
  MAC_CONTENT_CCCH  /* This is CCCH? */
};

/* Mapping logicalchannel id to RLC_MODE */
guint8 lchId_rlc_map[] = {
  0,
  RLC_UM, /* Logical channel id = 1 is SRB1 which uses RLC_UM*/
  RLC_AM,
  RLC_AM,
  RLC_AM,
  RLC_TM, /*5 to 7 Conv CS Speech*/
  RLC_TM,
  RLC_TM, /*...*/
  RLC_AM,
  RLC_AM,
  RLC_AM,
  RLC_AM,
  RLC_AM,
  RLC_AM,
  RLC_AM,
  RLC_AM, /* This is CCCH which is UM?, probably not */
};

/* Preference variables */
/* Array with preference variables for easy looping, TODO: merge this with
 * lchId_type_table[] */
static int lch_contents[16] = {
  MAC_CONTENT_DCCH,
  MAC_CONTENT_DCCH,
  MAC_CONTENT_DCCH,
  MAC_CONTENT_DCCH,
  MAC_CONTENT_CS_DTCH,
  MAC_CONTENT_CS_DTCH,
  MAC_CONTENT_CS_DTCH,
  MAC_CONTENT_DCCH,
  MAC_CONTENT_PS_DTCH,
  MAC_CONTENT_UNKNOWN,
  MAC_CONTENT_PS_DTCH,
  MAC_CONTENT_PS_DTCH,
  MAC_CONTENT_CS_DTCH,
  MAC_CONTENT_PS_DTCH,
  MAC_CONTENT_CCCH,
  MAC_CONTENT_DCCH
};

static const enum_val_t content_types[] = {
  {"MAC_CONTENT_UNKNOWN", "MAC_CONTENT_UNKNOWN", MAC_CONTENT_UNKNOWN},
  {"MAC_CONTENT_DCCH", "MAC_CONTENT_DCCH", MAC_CONTENT_DCCH},
  {"MAC_CONTENT_PS_DTCH", "MAC_CONTENT_PS_DTCH", MAC_CONTENT_PS_DTCH},
  {"MAC_CONTENT_CS_DTCH", "MAC_CONTENT_CS_DTCH", MAC_CONTENT_CS_DTCH},
  {"MAC_CONTENT_CCCH", "MAC_CONTENT_CCCH", MAC_CONTENT_CCCH},
  {NULL, NULL, -1}};

typedef struct {
  const char *name;
  const char *title;
  const char *description;
} preference_strings;

/* This is used when registering preferences, name, title, description */
static const preference_strings ch_strings[] = {
  {"lch1_content", "Logical Channel 1 Content", "foo"},
  {"lch2_content", "Logical Channel 2 Content", "foo"},
  {"lch3_content", "Logical Channel 3 Content", "foo"},
  {"lch4_content", "Logical Channel 4 Content", "foo"},
  {"lch5_content", "Logical Channel 5 Content", "foo"},
  {"lch6_content", "Logical Channel 6 Content", "foo"},
  {"lch7_content", "Logical Channel 7 Content", "foo"},
  {"lch8_content", "Logical Channel 8 Content", "foo"},
  {"lch9_content", "Logical Channel 9 Content", "foo"},
  {"lch10_content", "Logical Channel 10 Content", "foo"},
  {"lch11_content", "Logical Channel 11 Content", "foo"},
  {"lch12_content", "Logical Channel 12 Content", "foo"},
  {"lch13_content", "Logical Channel 13 Content", "foo"},
  {"lch14_content", "Logical Channel 14 Content", "foo"},
  {"lch15_content", "Logical Channel 15 Content", "foo"},
  {"lch16_content", "Logical Channel 16 Content", "foo"}};

/* Dissector tables */
static dissector_table_t nbap_ies_dissector_table;
static dissector_table_t nbap_extension_dissector_table;
static dissector_table_t nbap_proc_imsg_dissector_table;
static dissector_table_t nbap_proc_sout_dissector_table;
static dissector_table_t nbap_proc_uout_dissector_table;

static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);

static guint32 calculate_setup_conv_key(const guint32 transaction_id, const guint32 dd_mode, const guint32 channel_id);
static void add_setup_conv(const guint32 transaction_id, const guint32 dd_mode, const guint32 channel_id, const guint32 req_frame_number,
           const address *addr, const guint32 port, umts_fp_conversation_info_t * umts_fp_conversation_info, conversation_t *conv);
static nbap_setup_conv_t* find_setup_conv(const guint32 transaction_id, const guint32 dd_mode, const guint32 channel_id);
static void delete_setup_conv(nbap_setup_conv_t *conv);

/*Easy way to add hsdhsch binds for corner cases*/
static void add_hsdsch_bind(packet_info * pinfo);

#include "packet-nbap-fn.c"

static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
  return (dissector_try_uint_new(nbap_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree, FALSE, NULL)) ? tvb_captured_length(tvb) : 0;
}

static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
  return (dissector_try_uint_new(nbap_extension_dissector_table, ProtocolIE_ID, tvb, pinfo, tree, FALSE, NULL)) ? tvb_captured_length(tvb) : 0;
}

static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
  if (!ProcedureID) return 0;
  return (dissector_try_string(nbap_proc_imsg_dissector_table, ProcedureID, tvb, pinfo, tree, NULL)) ? tvb_captured_length(tvb) : 0;
}

static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
  if (!ProcedureID) return 0;
  return (dissector_try_string(nbap_proc_sout_dissector_table, ProcedureID, tvb, pinfo, tree, NULL)) ? tvb_captured_length(tvb) : 0;
}

static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
  if (!ProcedureID) return 0;
  return (dissector_try_string(nbap_proc_uout_dissector_table, ProcedureID, tvb, pinfo, tree, NULL)) ? tvb_captured_length(tvb) : 0;
}
static void add_hsdsch_bind(packet_info *pinfo){
  address null_addr;
  conversation_t *conversation = NULL;
  umts_fp_conversation_info_t *umts_fp_conversation_info;
  fp_hsdsch_channel_info_t* fp_hsdsch_channel_info = NULL;
  guint32 i;

  if (pinfo->fd->flags.visited){
    return;
  }

  /* Set port to zero use that as an indication of whether we have data or not */
  clear_address(&null_addr);
  for (i = 0; i < maxNrOfMACdFlows; i++) {
    if (nbap_hsdsch_channel_info[i].crnc_port != 0){
      conversation = find_conversation(pinfo->num, &(nbap_hsdsch_channel_info[i].crnc_address), &null_addr, PT_UDP,
                                      nbap_hsdsch_channel_info[i].crnc_port, 0, NO_ADDR_B);

      if (conversation == NULL) {
        /* It's not part of any conversation - create a new one. */
        conversation = conversation_new(pinfo->num, &(nbap_hsdsch_channel_info[i].crnc_address), &null_addr, PT_UDP,
                                       nbap_hsdsch_channel_info[i].crnc_port, 0, NO_ADDR2|NO_PORT2);

        /* Set dissector */
        conversation_set_dissector(conversation, fp_handle);

        if(pinfo->link_dir==P2P_DIR_DL){
          umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
          /* Fill in the HSDSCH relevant data */
          umts_fp_conversation_info->iface_type        = IuB_Interface;
          umts_fp_conversation_info->division          = Division_FDD;
          umts_fp_conversation_info->channel           = CHANNEL_HSDSCH;
          umts_fp_conversation_info->dl_frame_number   = 0;
          umts_fp_conversation_info->ul_frame_number   = pinfo->num;
          copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &nbap_hsdsch_channel_info[i].crnc_address);
          umts_fp_conversation_info->crnc_port         = nbap_hsdsch_channel_info[i].crnc_port;

          fp_hsdsch_channel_info = wmem_new0(wmem_file_scope(), fp_hsdsch_channel_info_t);
          umts_fp_conversation_info->channel_specific_info = (void*)fp_hsdsch_channel_info;
          /*Added june 3, normally just the iterator variable*/
          fp_hsdsch_channel_info->hsdsch_macdflow_id = i ; /*hsdsch_macdflow_ids[i];*/ /* hsdsch_macdflow_id;*/

          /* Cheat and use the DCH entries */
          umts_fp_conversation_info->num_dch_in_flow++;
          umts_fp_conversation_info->dch_ids_in_flow_list[umts_fp_conversation_info->num_dch_in_flow -1] = i;

          /*XXX: Is this craziness, what is physical_layer? */
          if(nbap_hsdsch_channel_info[i].entity == entity_not_specified ){
            /*Error*/
            expert_add_info(pinfo, NULL, &ei_nbap_hsdsch_entity_not_specified);
          }else{
            fp_hsdsch_channel_info->hsdsch_entity = (enum fp_hsdsch_entity)nbap_hsdsch_channel_info[i].entity;
          }
          umts_fp_conversation_info->rlc_mode = nbap_hsdsch_channel_info[i].rlc_mode;
          set_umts_fp_conv_data(conversation, umts_fp_conversation_info);
        }
      }
    }
  }
}

/*
 * Function used to manage conversation declared in Setup Request/Response message
 */
static guint32 calculate_setup_conv_key(const guint32 transaction_id, const guint32 dd_mode, const guint32 channel_id)
{
  /* We need to pack 3 values on 32 bits:
   * 31-16 transaction_id
   * 15-14 dd_mode
   * 13-0  channel_id
   */
  guint32 key;
  key = transaction_id << 16;
  key |= (dd_mode & 0x03) << 14;
  key |= (channel_id & 0x3fff);
  nbap_debug("\tCalculating key 0x%04x", key);
  return key;
}

static void add_setup_conv(const guint32 transaction_id, const guint32 dd_mode, const guint32 channel_id, const guint32 req_frame_number,
              const address *addr, const guint32 port, umts_fp_conversation_info_t * umts_fp_conversation_info, conversation_t *conv)
{
  nbap_setup_conv_t *new_conv = NULL;
  guint32 key;

  nbap_debug("Creating new setup conv\t TransactionID: %u\tddMode: %u\tChannelID: %u\t %s:%u",
  transaction_id, dd_mode, channel_id, address_to_str(wmem_packet_scope(), addr), port);

  new_conv = wmem_new0(wmem_file_scope(), nbap_setup_conv_t);

  /* fill with data */
  new_conv->transaction_id = transaction_id;
  new_conv->dd_mode = dd_mode;
  new_conv->channel_id = channel_id;
  new_conv->request_frame_number = req_frame_number;
  copy_address_wmem(wmem_file_scope(), &new_conv->addr, addr);
  new_conv->port = port;
  new_conv->umts_fp_conversation_info = umts_fp_conversation_info;
  new_conv->conv = conv;

  key = calculate_setup_conv_key(new_conv->transaction_id, new_conv->dd_mode, new_conv->channel_id);

  wmem_map_insert(nbap_setup_conv_table, GUINT_TO_POINTER(key), new_conv);
}

static nbap_setup_conv_t* find_setup_conv(const guint32 transaction_id, const guint32 dd_mode, const guint32 channel_id)
{
  nbap_setup_conv_t *conv;
  guint32 key;
  nbap_debug("Looking for Setup Conversation match\t TransactionID: %u\t ddMode: %u\t ChannelID: %u", transaction_id, dd_mode, channel_id);

  key = calculate_setup_conv_key(transaction_id, dd_mode, channel_id);

  conv = (nbap_setup_conv_t*) wmem_map_lookup(nbap_setup_conv_table, GUINT_TO_POINTER(key));

  if(conv == NULL){
    nbap_debug("\tDidnt found Setup Conversation match");
  }else{
    nbap_debug("\tFOUND Setup Conversation match\t TransactionID: %u\t ddMode: %u\t ChannelID: %u\t %s:%u",
         conv->transaction_id, conv->dd_mode, conv->channel_id, address_to_str(wmem_packet_scope(), &(conv->addr)), conv->port);
  }

  return conv;
}

static void delete_setup_conv(nbap_setup_conv_t *conv)
{
  guint32 key;

  key = calculate_setup_conv_key(conv->transaction_id, conv->dd_mode, conv->channel_id);
  /* check if conversation exist */
  if(conv == NULL){
    nbap_debug("Trying delete Setup Conversation that does not exist (ptr == NULL)\t");
    return;
  }
  wmem_map_remove(nbap_setup_conv_table, GUINT_TO_POINTER(key));
}

static void nbap_init(void){
  guint8 i;
  /*Initialize*/
  com_context_map = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());

  /*Initialize structure for muxed flow indication*/
  edch_flow_port_map = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());

  /*Initialize Setup Conversation hash table*/
  nbap_setup_conv_table = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
  /*Initializing Scrambling Code to C-RNC Context & C-RNC Context to U-RNTI maps*/
  nbap_scrambling_code_crncc_map = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
  nbap_crncc_urnti_map = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());

  for (i = 0; i < 15; i++) {
    lchId_type_table[i+1] = lch_contents[i];
  }
}

static int
dissect_nbap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
  proto_item *nbap_item = NULL;
  proto_tree *nbap_tree = NULL;
  int i;
  /* make entry in the Protocol column on summary display */
  col_set_str(pinfo->cinfo, COL_PROTOCOL, "NBAP");

  /* create the nbap protocol tree */
  nbap_item = proto_tree_add_item(tree, proto_nbap, tvb, 0, -1, ENC_NA);
  nbap_tree = proto_item_add_subtree(nbap_item, ett_nbap);

  /*Do a little cleanup just as a precaution*/
  for (i = 0; i < maxNrOfMACdFlows; i++) {
    nbap_hsdsch_channel_info[i].entity = hs;
  }
  ul_scrambling_code = 0;

  return dissect_NBAP_PDU_PDU(tvb, pinfo, nbap_tree, data);
}

/*--- proto_register_nbap -------------------------------------------*/
void proto_register_nbap(void)
{
  module_t *nbap_module;
  guint8 i;

  /* List of fields */
  static hf_register_info hf[] = {
  { &hf_nbap_transportLayerAddress_ipv4,
    { "transportLayerAddress IPv4", "nbap.transportLayerAddress_ipv4",
    FT_IPv4, BASE_NONE, NULL, 0,
  NULL, HFILL }},
  { &hf_nbap_transportLayerAddress_ipv6,
    { "transportLayerAddress IPv6", "nbap.transportLayerAddress_ipv6",
    FT_IPv6, BASE_NONE, NULL, 0,
    NULL, HFILL }},
  { &hf_nbap_transportLayerAddress_nsap,
    { "transportLayerAddress NSAP", "nbap.transportLayerAddress_NSAP",
    FT_BYTES, BASE_NONE, NULL, 0,
    NULL, HFILL }},
  #include "packet-nbap-hfarr.c"
  };

  /* List of subtrees */
  static gint *ett[] = {
    &ett_nbap,
    &ett_nbap_TransportLayerAddress,
    &ett_nbap_TransportLayerAddress_nsap,
    &ett_nbap_ib_sg_data,
    #include "packet-nbap-ettarr.c"
  };

  static ei_register_info ei[] = {
    { &ei_nbap_no_set_comm_context_id, { "nbap.no_set_comm_context_id", PI_MALFORMED, PI_WARN, "Couldn't not set Communication Context-ID, fragments over reconfigured channels might fail", EXPFILL }},
    { &ei_nbap_no_find_comm_context_id, { "nbap.no_find_comm_context_id", PI_MALFORMED, PI_WARN, "Couldn't not find Communication Context-ID, unable to reconfigure this E-DCH flow.", EXPFILL }},
    { &ei_nbap_no_find_port_info, { "nbap.no_find_port_info", PI_MALFORMED, PI_WARN, "Couldn't not find port information for reconfigured E-DCH flow, unable to reconfigure", EXPFILL }},
    { &ei_nbap_hsdsch_entity_not_specified, { "nbap.hsdsch_entity_not_specified", PI_MALFORMED,PI_ERROR, "HSDSCH Entity not specified!", EXPFILL }},
  };

  expert_module_t* expert_nbap;

  /* Register protocol */
  proto_nbap = proto_register_protocol(PNAME, PSNAME, PFNAME);
  /* Register fields and subtrees */
  proto_register_field_array(proto_nbap, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));
  expert_nbap = expert_register_protocol(proto_nbap);
  expert_register_field_array(expert_nbap, ei, array_length(ei));

  /* Register dissector */
  nbap_handle = register_dissector("nbap", dissect_nbap, proto_nbap);

  nbap_module = prefs_register_protocol(proto_nbap, NULL);

  /* Register preferences for mapping logical channel IDs to MAC content types. */
  for (i = 0; i < 16; i++) {
    prefs_register_enum_preference(nbap_module, ch_strings[i].name, ch_strings[i].title, ch_strings[i].description, &lch_contents[i], content_types, FALSE);
  }

  /* Register dissector tables */
  nbap_ies_dissector_table = register_dissector_table("nbap.ies", "NBAP-PROTOCOL-IES", proto_nbap, FT_UINT32, BASE_DEC);
  nbap_extension_dissector_table = register_dissector_table("nbap.extension", "NBAP-PROTOCOL-EXTENSION", proto_nbap, FT_UINT32, BASE_DEC);
  nbap_proc_imsg_dissector_table = register_dissector_table("nbap.proc.imsg", "NBAP-ELEMENTARY-PROCEDURE InitiatingMessage", proto_nbap, FT_STRING, BASE_NONE);
  nbap_proc_sout_dissector_table = register_dissector_table("nbap.proc.sout", "NBAP-ELEMENTARY-PROCEDURE SuccessfulOutcome", proto_nbap, FT_STRING, BASE_NONE);
  nbap_proc_uout_dissector_table = register_dissector_table("nbap.proc.uout", "NBAP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", proto_nbap, FT_STRING, BASE_NONE);

  register_init_routine(nbap_init);
}

/*
 * #define	EXTRA_PPI 1
 */
/*--- proto_reg_handoff_nbap ---------------------------------------*/
void
proto_reg_handoff_nbap(void)
{
  fp_handle = find_dissector("fp");
  dissector_add_uint("sctp.ppi", NBAP_PAYLOAD_PROTOCOL_ID, nbap_handle);
#ifdef EXTRA_PPI
  dissector_add_uint("sctp.ppi", 17, nbap_handle);
#endif
  dissector_add_for_decode_as("sctp.port", nbap_handle);

#include "packet-nbap-dis-tab.c"
}