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/*******************************************************************************

  Eurecom OpenAirInterface
  Copyright(c) 1999 - 2011 Eurecom

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope 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 St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information
  Openair Admin: openair_admin@eurecom.fr
  Openair Tech : openair_tech@eurecom.fr
  Forums       : http://forums.eurecom.fsr/openairinterface
  Address      : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France

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 *******************************************************************************/
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/*! \file pdcp.c
 * \brief pdcp interface with RLC
 * \author  Lionel GAUTHIER and Navid Nikaein
 * \date 2009-2012
 * \version 1.0
 */

#define PDCP_C
#ifndef USER_MODE
#include <rtai_fifos.h>
#endif
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#include "assertions.h"
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#include "pdcp.h"
#include "pdcp_util.h"
#include "pdcp_sequence_manager.h"
#include "LAYER2/RLC/rlc.h"
#include "LAYER2/MAC/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "pdcp_primitives.h"
#include "OCG.h"
#include "OCG_extern.h"
#include "UTIL/LOG/log.h"
#include <inttypes.h>
#include "platform_constants.h"
#include "UTIL/LOG/vcd_signal_dumper.h"

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#if defined(ENABLE_SECURITY)
# include "UTIL/OSA/osa_defs.h"
#endif

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#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
#endif

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#ifndef OAI_EMU
extern int otg_enabled;
#endif

//extern char *packet_gen(int src, int dst, int ctime, int *pkt_size);
extern int otg_rx_pkt( int src, int dst, int ctime, char *buffer_tx, unsigned int size);

//-----------------------------------------------------------------------------
/*
 * If PDCP_UNIT_TEST is set here then data flow between PDCP and RLC is broken
 * and PDCP has no longer anything to do with RLC. In this case, after it's handed
 * an SDU it appends PDCP header and returns (by filling in incoming pointer parameters)
 * this mem_block_t to be dissected for testing purposes. For further details see test
 * code at targets/TEST/PDCP/test_pdcp.c:test_pdcp_data_req()
 */
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boolean_t pdcp_data_req(module_id_t enb_mod_idP, module_id_t ue_mod_idP, frame_t frameP, eNB_flag_t enb_flagP, rb_id_t rb_idP, mui_t muiP, confirm_t confirmP,
    sdu_size_t sdu_buffer_sizeP, unsigned char* sdu_buffer_pP, pdcp_transmission_mode_t modeP)
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{
  //-----------------------------------------------------------------------------
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  pdcp_t            *pdcp_p          = NULL;
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  uint8_t            i               = 0;
  uint8_t            pdcp_header_len = 0;
  uint8_t            pdcp_tailer_len = 0;
  uint16_t           pdcp_pdu_size   = 0;
  uint16_t           current_sn      = 0;
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  mem_block_t       *pdcp_pdu_p      = NULL;
  rlc_op_status_t    rlc_status;
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  boolean_t          ret             = TRUE;
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  AssertError (enb_mod_idP < NUMBER_OF_eNB_MAX, return FALSE, "eNB id is too high (%u/%d) %u %u!\n", enb_mod_idP, NUMBER_OF_eNB_MAX, ue_mod_idP, rb_idP);
  AssertError (ue_mod_idP < NUMBER_OF_UE_MAX, return FALSE, "UE id is too high (%u/%d) %u %u!\n", ue_mod_idP, NUMBER_OF_UE_MAX, enb_mod_idP, rb_idP);
  AssertError (rb_idP < NB_RB_MAX, return FALSE, "RB id is too high (%u/%d) %u %u!\n", rb_idP, NB_RB_MAX, ue_mod_idP, enb_mod_idP);

  if (enb_flagP == 0) {
      pdcp_p = &pdcp_array_ue[ue_mod_idP][rb_idP];
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  } else {
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      pdcp_p = &pdcp_array_eNB[enb_mod_idP][ue_mod_idP][rb_idP];
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  }
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  if ((pdcp_p->instanciated_instance == 0) && (modeP != PDCP_TRANSMISSION_MODE_TRANSPARENT)) {
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      if (enb_flagP == 0) {
          LOG_W(PDCP, "[UE %d] Instance is not configured for eNB %d, rb_id %d Ignoring SDU...\n",
              ue_mod_idP, enb_mod_idP, rb_idP);
      } else {
          LOG_W(PDCP, "[eNB %d] Instance is not configured for UE %d, rb_id %d Ignoring SDU...\n",
              enb_mod_idP, ue_mod_idP, rb_idP);
      }
      return FALSE;
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  }
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  if (sdu_buffer_sizeP == 0) {
      LOG_W(PDCP, "Handed SDU is of size 0! Ignoring...\n");
      return FALSE;
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  }
  /*
   * XXX MAX_IP_PACKET_SIZE is 4096, shouldn't this be MAX SDU size, which is 8188 bytes?
   */

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  if (sdu_buffer_sizeP > MAX_IP_PACKET_SIZE) {
      LOG_E(PDCP, "Requested SDU size (%d) is bigger than that can be handled by PDCP (%u)!\n",
          sdu_buffer_sizeP, MAX_IP_PACKET_SIZE);
      // XXX What does following call do?
      mac_xface->macphy_exit("PDCP sdu buffer size > MAX_IP_PACKET_SIZE");
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  }
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  if (enb_flagP == 0) 
    start_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
  else 
    start_meas(&UE_pdcp_stats[ue_mod_idP].data_req);
 
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  // PDCP transparent mode for MBMS traffic 

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  if (modeP == PDCP_TRANSMISSION_MODE_TRANSPARENT) {
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      LOG_D(PDCP, " [TM] Asking for a new mem_block of size %d\n",sdu_buffer_sizeP);
      pdcp_pdu_p = get_free_mem_block(sdu_buffer_sizeP);
      if (pdcp_pdu_p != NULL) {
          memcpy(&pdcp_pdu_p->data[0], sdu_buffer_pP, sdu_buffer_sizeP);
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          rlc_status = rlc_data_req(enb_mod_idP, ue_mod_idP, frameP, enb_flagP, MBMS_FLAG_YES, rb_idP, muiP, confirmP, sdu_buffer_sizeP, pdcp_pdu_p);
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      } else {
        rlc_status = RLC_OP_STATUS_OUT_OF_RESSOURCES;
#if defined(STOP_ON_IP_TRAFFIC_OVERLOAD)
        AssertFatal(0, "[FRAME %5u][%s][PDCP][MOD %u/%u][RB %u] PDCP_DATA_REQ SDU DROPPED, OUT OF MEMORY \n",
            frameP,
            (enb_flagP) ? "eNB" : "UE",
            enb_mod_idP,
            ue_mod_idP,
            rb_idP);
#endif
      }
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  } else {
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      // calculate the pdcp header and trailer size
      if (rb_idP < DTCH) {
          pdcp_header_len = PDCP_CONTROL_PLANE_DATA_PDU_SN_SIZE;
          pdcp_tailer_len = PDCP_CONTROL_PLANE_DATA_PDU_MAC_I_SIZE;
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      } else {
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          pdcp_header_len = PDCP_USER_PLANE_DATA_PDU_LONG_SN_HEADER_SIZE;
          pdcp_tailer_len = 0;
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      }
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      pdcp_pdu_size = sdu_buffer_sizeP + pdcp_header_len + pdcp_tailer_len;

      LOG_I(PDCP, "Data request notification for PDCP entity %s enb id %u ue_id %u and radio bearer ID %d pdu size %d (header%d, trailer%d)\n",
          (enb_flagP) ? "eNB" : "UE",
              enb_mod_idP,
              ue_mod_idP,
              rb_idP,
              pdcp_pdu_size,
              pdcp_header_len,
              pdcp_tailer_len);

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      /*
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       * Allocate a new block for the new PDU (i.e. PDU header and SDU payload)
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       */
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      LOG_D(PDCP, "Asking for a new mem_block of size %d\n", pdcp_pdu_size);
      pdcp_pdu_p = get_free_mem_block(pdcp_pdu_size);

      if (pdcp_pdu_p != NULL) {
          /*
           * Create a Data PDU with header and append data
           *
           * Place User Plane PDCP Data PDU header first
           */

          if ((rb_idP % NB_RB_MAX) < DTCH) { // this Control plane PDCP Data PDU
              pdcp_control_plane_data_pdu_header pdu_header;
              pdu_header.sn = pdcp_get_next_tx_seq_number(pdcp_p);
              current_sn = pdu_header.sn;
              memset(&pdu_header.mac_i[0],0,PDCP_CONTROL_PLANE_DATA_PDU_MAC_I_SIZE);
              if (pdcp_serialize_control_plane_data_pdu_with_SRB_sn_buffer((unsigned char*)pdcp_pdu_p->data, &pdu_header) == FALSE) {
                  LOG_E(PDCP, "Cannot fill PDU buffer with relevant header fields!\n");
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		  if (enb_flagP == 0) 
		    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
		  else 
		    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_req);
		  return FALSE;
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              }
          } else {
              pdcp_user_plane_data_pdu_header_with_long_sn pdu_header;
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              pdu_header.dc = (modeP == PDCP_TRANSMISSION_MODE_DATA) ? PDCP_DATA_PDU_BIT_SET :  PDCP_CONTROL_PDU_BIT_SET;
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              pdu_header.sn = pdcp_get_next_tx_seq_number(pdcp_p);
              current_sn = pdu_header.sn ;
              if (pdcp_serialize_user_plane_data_pdu_with_long_sn_buffer((unsigned char*)pdcp_pdu_p->data, &pdu_header) == FALSE) {
                  LOG_E(PDCP, "Cannot fill PDU buffer with relevant header fields!\n");
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		  if (enb_flagP == 0) 
		    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
		  else 
		    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_req);
		  return FALSE;
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              }
          }
          /*
           * Validate incoming sequence number, there might be a problem with PDCP initialization
           */
          if (current_sn > pdcp_calculate_max_seq_num_for_given_size(pdcp_p->seq_num_size)) {
              LOG_E(PDCP, "Generated sequence number (%lu) is greater than a sequence number could ever be!\n", current_sn);
              LOG_E(PDCP, "There must be a problem with PDCP initialization, ignoring this PDU...\n");

              free_mem_block(pdcp_pdu_p);
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	      if (enb_flagP == 0) 
		stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
	      else 
		stop_meas(&UE_pdcp_stats[ue_mod_idP].data_req);
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              return FALSE;
          }
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          LOG_D(PDCP, "Sequence number %d is assigned to current PDU\n", current_sn);
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          /* Then append data... */
          memcpy(&pdcp_pdu_p->data[pdcp_header_len], sdu_buffer_pP, sdu_buffer_sizeP);
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          //For control plane data that are not integrity protected,
          // the MAC-I field is still present and should be padded with padding bits set to 0.
          // NOTE: user-plane data are never integrity protected
          for (i=0;i<pdcp_tailer_len;i++)
            pdcp_pdu_p->data[pdcp_header_len + sdu_buffer_sizeP + i] = 0x00;// pdu_header.mac_i[i];
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#if defined(ENABLE_SECURITY)
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          if ((pdcp->security_activated != 0) &&
              ((pdcp->cipheringAlgorithm) != 0) &&
              ((pdcp->integrityProtAlgorithm) != 0)) {
              pdcp_apply_security(pdcp, rb_id % NB_RB_MAX,
                  pdcp_header_len, current_sn, pdcp_pdu->data,
                  sdu_buffer_size);
          }
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#endif

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          /* Print octets of outgoing data in hexadecimal form */
          LOG_D(PDCP, "Following content with size %d will be sent over RLC (PDCP PDU header is the first two bytes)\n",
              pdcp_pdu_size);
          //util_print_hex_octets(PDCP, (unsigned char*)pdcp_pdu_p->data, pdcp_pdu_size);
          //util_flush_hex_octets(PDCP, (unsigned char*)pdcp_pdu->data, pdcp_pdu_size);
      } else {
          LOG_E(PDCP, "Cannot create a mem_block for a PDU!\n");
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	  if (enb_flagP == 0) 
	    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
	  else 
	    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_req);
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#if defined(STOP_ON_IP_TRAFFIC_OVERLOAD)
        AssertFatal(0, "[FRAME %5u][%s][PDCP][MOD %u/%u][RB %u] PDCP_DATA_REQ SDU DROPPED, OUT OF MEMORY \n",
            frameP,
            (enb_flagP) ? "eNB" : "UE",
            enb_mod_idP,
            ue_mod_idP,
            rb_idP);
#endif
          return FALSE;
      }
      /*
       * Ask sublayer to transmit data and check return value
       * to see if RLC succeeded
       */
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      rlc_status = rlc_data_req(enb_mod_idP, ue_mod_idP, frameP, enb_flagP, MBMS_FLAG_NO, rb_idP, muiP, confirmP, pdcp_pdu_size, pdcp_pdu_p);
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  }
  switch (rlc_status) {
  case RLC_OP_STATUS_OK:
    LOG_D(PDCP, "Data sending request over RLC succeeded!\n");
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    ret=TRUE;
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    break;

  case RLC_OP_STATUS_BAD_PARAMETER:
    LOG_W(PDCP, "Data sending request over RLC failed with 'Bad Parameter' reason!\n");
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    ret= FALSE;
    break;
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  case RLC_OP_STATUS_INTERNAL_ERROR:
    LOG_W(PDCP, "Data sending request over RLC failed with 'Internal Error' reason!\n");
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    ret= FALSE;
    break;
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  case RLC_OP_STATUS_OUT_OF_RESSOURCES:
    LOG_W(PDCP, "Data sending request over RLC failed with 'Out of Resources' reason!\n");
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    ret= FALSE;
    break;
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  default:
    LOG_W(PDCP, "RLC returned an unknown status code after PDCP placed the order to send some data (Status Code:%d)\n", rlc_status);
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    ret= FALSE;
    break;
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  }
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  if (enb_flagP == 0) 
    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
  else 
    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_req);
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  /*
   * Control arrives here only if rlc_data_req() returns RLC_OP_STATUS_OK
   * so we return TRUE afterwards
   */
  /*  
   if (rb_id>=DTCH) {
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    if (enb_flagP == 1) {
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      Pdcp_stats_tx[module_id][(rb_id & RAB_OFFSET2 )>> RAB_SHIFT2][(rb_id & RAB_OFFSET)-DTCH]++;
      Pdcp_stats_tx_bytes[module_id][(rb_id & RAB_OFFSET2 )>> RAB_SHIFT2][(rb_id & RAB_OFFSET)-DTCH] += sdu_buffer_size;
    } else {
      Pdcp_stats_tx[module_id][(rb_id & RAB_OFFSET2 )>> RAB_SHIFT2][(rb_id & RAB_OFFSET)-DTCH]++;
      Pdcp_stats_tx_bytes[module_id][(rb_id & RAB_OFFSET2 )>> RAB_SHIFT2][(rb_id & RAB_OFFSET)-DTCH] += sdu_buffer_size;
    }
    }*/
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  return ret;
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}

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boolean_t pdcp_data_ind(module_id_t enb_mod_idP, module_id_t ue_mod_idP, frame_t frameP, eNB_flag_t enb_flagP, MBMS_flag_t MBMS_flagP, rb_id_t rb_idP, sdu_size_t sdu_buffer_sizeP, \
    mem_block_t* sdu_buffer_pP, boolean_t is_data_planeP)
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{
  //-----------------------------------------------------------------------------
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  pdcp_t      *pdcp_p          = NULL;
  list_t      *sdu_list_p      = NULL;
  mem_block_t *new_sdu_p       = NULL;
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  uint8_t           pdcp_header_len = 0;
  uint8_t           pdcp_tailer_len = 0;
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  pdcp_sn_t    sequence_number = 0;
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  uint8_t           payload_offset  = 0;
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  if (enb_flagP)
    start_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
  else 
    start_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);

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#ifdef OAI_EMU
  if (enb_flagP) {
      AssertFatal ((enb_mod_idP >= oai_emulation.info.first_enb_local) && (oai_emulation.info.nb_enb_local > 0),
          "eNB module id is too low (%u/%d)!\n",
          enb_mod_idP,
          oai_emulation.info.first_enb_local);
      AssertFatal ((enb_mod_idP < (oai_emulation.info.first_enb_local + oai_emulation.info.nb_enb_local)) && (oai_emulation.info.nb_enb_local > 0),
          "eNB module id is too high (%u/%d)!\n",
          enb_mod_idP,
          oai_emulation.info.first_enb_local + oai_emulation.info.nb_enb_local);
      AssertFatal (ue_mod_idP  < NB_UE_INST,
          "UE module id is too high (%u/%d)!\n",
          ue_mod_idP,
          oai_emulation.info.first_ue_local + oai_emulation.info.nb_ue_local);
  } else {
      AssertFatal (ue_mod_idP  < (oai_emulation.info.first_ue_local + oai_emulation.info.nb_ue_local),
          "UE module id is too high (%u/%d)!\n",
          ue_mod_idP,
          oai_emulation.info.first_ue_local + oai_emulation.info.nb_ue_local);
      AssertFatal (ue_mod_idP  >= oai_emulation.info.first_ue_local,
          "UE module id is too low (%u/%d)!\n",
          ue_mod_idP,
          oai_emulation.info.first_ue_local);
  }
#endif
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  DevCheck4(rb_idP < NB_RB_MAX, rb_idP, NB_RB_MAX, enb_mod_idP, ue_mod_idP);

  if (enb_flagP == 0) {
      pdcp_p = &pdcp_array_ue[ue_mod_idP][rb_idP];

      LOG_I(PDCP, "Data indication notification for PDCP entity from eNB %u to UE %u "
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          "and radio bearer ID %d rlc sdu size %d enb_flagP %d\n",
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          ue_mod_idP, enb_mod_idP, rb_idP, sdu_buffer_sizeP, enb_flagP);
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  } else {
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      pdcp_p = &pdcp_array_eNB[enb_mod_idP][ue_mod_idP][rb_idP];
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      LOG_I(PDCP, "Data indication notification for PDCP entity from UE %u to eNB %u "
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          "and radio bearer ID %d rlc sdu size %d enb_flagP %d eNB_id %d\n",
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          enb_mod_idP, ue_mod_idP, rb_idP, sdu_buffer_sizeP, enb_flagP, enb_mod_idP);
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  }
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  sdu_list_p = &pdcp_sdu_list;
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  if (sdu_buffer_sizeP == 0) {
      LOG_W(PDCP, "SDU buffer size is zero! Ignoring this chunk!\n");
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      if (enb_flagP)
	stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
      else 
	stop_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);
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      return FALSE;
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  }

  /*
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   * Check if incoming SDU is long enough to carry a PDU header
   */
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  if (MBMS_flagP == 0 ) {
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      if ((rb_idP % NB_RB_MAX) < DTCH) {
          pdcp_header_len = PDCP_CONTROL_PLANE_DATA_PDU_SN_SIZE;
          pdcp_tailer_len = PDCP_CONTROL_PLANE_DATA_PDU_MAC_I_SIZE;
      } else {
          pdcp_header_len = PDCP_USER_PLANE_DATA_PDU_LONG_SN_HEADER_SIZE;
          pdcp_tailer_len = 0;
      }
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      if (sdu_buffer_sizeP < pdcp_header_len + pdcp_tailer_len ) {
          LOG_W(PDCP, "Incoming (from RLC) SDU is short of size (size:%d)! Ignoring...\n", sdu_buffer_sizeP);
          free_mem_block(sdu_buffer_pP);
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	  if (enb_flagP)
	    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
	  else 
	    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);
	  return FALSE;
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      }
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      /*
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       * Parse the PDU placed at the beginning of SDU to check
       * if incoming SN is in line with RX window
       */

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      if (pdcp_header_len == PDCP_USER_PLANE_DATA_PDU_LONG_SN_HEADER_SIZE) { // DRB
          sequence_number =     pdcp_get_sequence_number_of_pdu_with_long_sn((unsigned char*)sdu_buffer_pP->data);
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          //       uint8_t dc = pdcp_get_dc_filed((unsigned char*)sdu_buffer->data);
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      } else { //SRB1/2
          sequence_number =   pdcp_get_sequence_number_of_pdu_with_SRB_sn((unsigned char*)sdu_buffer_pP->data);
      }
      if (pdcp_is_rx_seq_number_valid(sequence_number, pdcp_p) == TRUE) {
          LOG_D(PDCP, "Incoming PDU has a sequence number (%d) in accordance with RX window\n", sequence_number);
          /* if (dc == PDCP_DATA_PDU )
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	   LOG_D(PDCP, "Passing piggybacked SDU to NAS driver...\n");
	   else
	   LOG_D(PDCP, "Passing piggybacked SDU to RRC ...\n");*/
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      } else {
          LOG_W(PDCP, "Incoming PDU has an unexpected sequence number (%d), RX window snychronisation have probably been lost!\n", sequence_number);
          /*
           * XXX Till we implement in-sequence delivery and duplicate discarding
           * mechanism all out-of-order packets will be delivered to RRC/IP
           */
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#if 0
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          LOG_D(PDCP, "Ignoring PDU...\n");
          free_mem_block(sdu_buffer);
          return FALSE;
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#else
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          LOG_W(PDCP, "Delivering out-of-order SDU to upper layer...\n");
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#endif
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      }
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      // SRB1/2: control-plane data
      if ( (rb_idP % NB_RB_MAX) <  DTCH ){
#if defined(ENABLE_SECURITY)
          if (pdcp->security_activated == 1) {
              pdcp_validate_security(pdcp, rb_id, pdcp_header_len,
                  sequence_number, sdu_buffer->data,
                  sdu_buffer_size - pdcp_tailer_len);
          }
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#endif
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//rrc_lite_data_ind(module_id, //Modified MW - L2 Interface
          pdcp_rrc_data_ind(enb_mod_idP,
              ue_mod_idP,
              frameP,
              enb_flagP,
              rb_idP,
              sdu_buffer_sizeP - pdcp_header_len - pdcp_tailer_len,
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              (uint8_t*)&sdu_buffer_pP->data[pdcp_header_len]);
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          free_mem_block(sdu_buffer_pP);
          // free_mem_block(new_sdu);
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          if (enb_flagP)
	    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
	  else 
	    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);
	  return TRUE;
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      }
      payload_offset=PDCP_USER_PLANE_DATA_PDU_LONG_SN_HEADER_SIZE;
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#if defined(ENABLE_SECURITY)
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      if (pdcp->security_activated == 1) {
          pdcp_validate_security(pdcp_p, rb_idP % NB_RB_MAX, pdcp_header_len,
              sequence_number, sdu_buffer->data,
              sdu_buffer_size - pdcp_tailer_len);
      }
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#endif
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  } else {
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      payload_offset=0;
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  }
#if defined(USER_MODE) && defined(OAI_EMU)
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  if (oai_emulation.info.otg_enabled == 1) {
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      module_id_t src_id, dst_id;
      int    ctime;

      src_id = (enb_flagP != 0) ? ue_mod_idP : enb_mod_idP;
      dst_id = (enb_flagP == 0) ? ue_mod_idP : enb_mod_idP;
      ctime = oai_emulation.info.time_ms; // avg current simulation time in ms : we may get the exact time through OCG?
      LOG_D(PDCP, "Check received buffer : enb_flag %d  rab id %d (src %d, dst %d)\n",
          enb_flagP, rb_idP, src_id, dst_id);

      if (otg_rx_pkt(src_id, dst_id,ctime,&sdu_buffer_pP->data[payload_offset],
          sdu_buffer_sizeP - payload_offset ) == 0 ) {
          free_mem_block(sdu_buffer_pP);
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           if (enb_flagP)
	     stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
	   else 
	     stop_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);
	  return TRUE;
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      }
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  }
#else
  if (otg_enabled==1) {
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      LOG_D(OTG,"Discarding received packed\n");
      free_mem_block(sdu_buffer_pP);
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      if (enb_flagP)
	stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
      else 
	stop_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);
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      return TRUE;
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  }
#endif
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  new_sdu_p = get_free_mem_block(sdu_buffer_sizeP - payload_offset + sizeof (pdcp_data_ind_header_t));
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  if (new_sdu_p) {
      /*
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       * Prepend PDCP indication header which is going to be removed at pdcp_fifo_flush_sdus()
       */
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      memset(new_sdu_p->data, 0, sizeof (pdcp_data_ind_header_t));
      ((pdcp_data_ind_header_t *) new_sdu_p->data)->data_size = sdu_buffer_sizeP - payload_offset;

      // Here there is no virtualization possible
      // set ((pdcp_data_ind_header_t *) new_sdu_p->data)->inst for IP layer here
      if (enb_flagP == 0) {
          ((pdcp_data_ind_header_t *) new_sdu_p->data)->rb_id = rb_idP;
#if defined(OAI_EMU)
          ((pdcp_data_ind_header_t *) new_sdu_p->data)->inst  = ue_mod_idP + oai_emulation.info.nb_enb_local - oai_emulation.info.first_ue_local;
#endif
      } else {
          ((pdcp_data_ind_header_t *) new_sdu_p->data)->rb_id = rb_idP + (ue_mod_idP * NB_RB_MAX);
#if defined(OAI_EMU)
          ((pdcp_data_ind_header_t *) new_sdu_p->data)->inst  = enb_mod_idP - oai_emulation.info.first_enb_local;
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#endif
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      }

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      // XXX Decompression would be done at this point

      /*
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       * After checking incoming sequence number PDCP header
       * has to be stripped off so here we copy SDU buffer starting
       * from its second byte (skipping 0th and 1st octets, i.e.
       * PDCP header)
       */
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      memcpy(&new_sdu_p->data[sizeof (pdcp_data_ind_header_t)], \
          &sdu_buffer_pP->data[payload_offset], \
          sdu_buffer_sizeP - payload_offset);
      list_add_tail_eurecom (new_sdu_p, sdu_list_p);

      /* Print octets of incoming data in hexadecimal form */
      LOG_D(PDCP, "Following content has been received from RLC (%d,%d)(PDCP header has already been removed):\n",
          sdu_buffer_sizeP  - payload_offset + sizeof(pdcp_data_ind_header_t),
          sdu_buffer_sizeP  - payload_offset);
      //util_print_hex_octets(PDCP, &new_sdu_p->data[sizeof (pdcp_data_ind_header_t)], sdu_buffer_sizeP - payload_offset);
      //util_flush_hex_octets(PDCP, &new_sdu_p->data[sizeof (pdcp_data_ind_header_t)], sdu_buffer_sizeP - payload_offset);

      /*
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       * Update PDCP statistics
       * XXX Following two actions are identical, is there a merge error?
       */
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      /*if (enb_flagP == 1) {
      Pdcp_stats_rx[module_id][(rb_idP & RAB_OFFSET2) >> RAB_SHIFT2][(rb_idP & RAB_OFFSET) - DTCH]++;
      Pdcp_stats_rx_bytes[module_id][(rb_idP & RAB_OFFSET2) >> RAB_SHIFT2][(rb_idP & RAB_OFFSET) - DTCH] += sdu_buffer_sizeP;
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    } else {
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      Pdcp_stats_rx[module_id][(rb_idP & RAB_OFFSET2) >> RAB_SHIFT2][(rb_idP & RAB_OFFSET) - DTCH]++;
      Pdcp_stats_rx_bytes[module_id][(rb_idP & RAB_OFFSET2) >> RAB_SHIFT2][(rb_idP & RAB_OFFSET) - DTCH] += sdu_buffer_sizeP;
    }*/
  }
#if defined(STOP_ON_IP_TRAFFIC_OVERLOAD)
  else {
      AssertFatal(0, "[FRAME %5u][%s][PDCP][MOD %u/%u][RB %u] PDCP_DATA_IND SDU DROPPED, OUT OF MEMORY \n",
            frameP,
            (enb_flagP) ? "eNB" : "UE",
            enb_mod_idP,
            ue_mod_idP,
            rb_idP);
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  }
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#endif
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  free_mem_block(sdu_buffer_pP);
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  if (enb_flagP)
    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
  else 
    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);
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  return TRUE;
}

//-----------------------------------------------------------------------------
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void pdcp_run (frame_t frameP, eNB_flag_t  enb_flagP, module_id_t ue_mod_idP, module_id_t enb_mod_idP) {
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  //-----------------------------------------------------------------------------
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#if defined(ENABLE_ITTI)
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  MessageDef   *msg_p;
  const char   *msg_name;
  instance_t    instance;
  int           result;
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#endif
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  if (enb_flagP)
    start_meas(&eNB_pdcp_stats[enb_mod_idP].pdcp_run);
  else 
    start_meas(&UE_pdcp_stats[ue_mod_idP].pdcp_run);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_PDCP_RUN, VCD_FUNCTION_IN);
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#if defined(ENABLE_ITTI)
  do {
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      // Checks if a message has been sent to PDCP sub-task
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      itti_poll_msg (enb_flagP ? TASK_PDCP_ENB : TASK_PDCP_UE, &msg_p);
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      if (msg_p != NULL) {
          msg_name = ITTI_MSG_NAME (msg_p);
          instance = ITTI_MSG_INSTANCE (msg_p);
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          switch (ITTI_MSG_ID(msg_p)) {
          case RRC_DCCH_DATA_REQ:
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            LOG_I(PDCP, "Received %s from %s: instance %d, frame %d, enb_flagP %d, rb_id %d, muiP %d, confirmP %d, mode %d\n",
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                msg_name, ITTI_MSG_ORIGIN_NAME(msg_p), instance,
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                RRC_DCCH_DATA_REQ (msg_p).frame, RRC_DCCH_DATA_REQ (msg_p).enb_flag, RRC_DCCH_DATA_REQ (msg_p).rb_id,
                RRC_DCCH_DATA_REQ (msg_p).muip, RRC_DCCH_DATA_REQ (msg_p).confirmp, RRC_DCCH_DATA_REQ (msg_p).mode);

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            result = pdcp_data_req (RRC_DCCH_DATA_REQ (msg_p).eNB_index, RRC_DCCH_DATA_REQ (msg_p).ue_index, RRC_DCCH_DATA_REQ (msg_p).frame, RRC_DCCH_DATA_REQ (msg_p).enb_flag,
                RRC_DCCH_DATA_REQ (msg_p).rb_id, RRC_DCCH_DATA_REQ (msg_p).muip,
                RRC_DCCH_DATA_REQ (msg_p).confirmp, RRC_DCCH_DATA_REQ (msg_p).sdu_size,
                RRC_DCCH_DATA_REQ (msg_p).sdu_p, RRC_DCCH_DATA_REQ (msg_p).mode);
            AssertFatal (result == TRUE, "PDCP data request failed!\n");
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            // Message buffer has been processed, free it now.
            result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), RRC_DCCH_DATA_REQ (msg_p).sdu_p);
            AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
            break;
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          default:
            LOG_E(PDCP, "Received unexpected message %s\n", msg_name);
            break;
          }
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          result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
          AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
      }
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  } while(msg_p != NULL);
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# if 0
  {
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      MessageDef *msg_resp_p;
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      msg_resp_p = itti_alloc_new_message(TASK_PDCP_ENB, MESSAGE_TEST);
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      itti_send_msg_to_task(TASK_RRC_ENB, 1, msg_resp_p);
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  }
  {
    MessageDef *msg_resp_p;

    msg_resp_p = itti_alloc_new_message(TASK_PDCP_ENB, MESSAGE_TEST);

    itti_send_msg_to_task(TASK_ENB_APP, 2, msg_resp_p);
  }
  {
    MessageDef *msg_resp_p;

    msg_resp_p = itti_alloc_new_message(TASK_PDCP_ENB, MESSAGE_TEST);

    itti_send_msg_to_task(TASK_MAC_ENB, 3, msg_resp_p);
  }
# endif
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#endif

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  pdcp_fifo_read_input_sdus_from_otg(frameP, enb_flagP, ue_mod_idP, enb_mod_idP);
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  // IP/NAS -> PDCP traffic : TX, read the pkt from the upper layer buffer
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  pdcp_fifo_read_input_sdus(frameP, enb_flagP, ue_mod_idP, enb_mod_idP);
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  // PDCP -> NAS/IP traffic: RX
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  pdcp_fifo_flush_sdus(frameP, enb_flagP, enb_mod_idP, ue_mod_idP);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_PDCP_RUN, VCD_FUNCTION_OUT); 
  if (enb_flagP)
    stop_meas(&eNB_pdcp_stats[enb_mod_idP].pdcp_run);
  else 
    stop_meas(&UE_pdcp_stats[ue_mod_idP].pdcp_run);

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}

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boolean_t rrc_pdcp_config_asn1_req (module_id_t               enb_mod_idP,
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    module_id_t               ue_mod_idP,
    frame_t              frameP,
    eNB_flag_t           enb_flagP,
    SRB_ToAddModList_t  *srb2add_list_pP,
    DRB_ToAddModList_t  *drb2add_list_pP,
    DRB_ToReleaseList_t *drb2release_list_pP,
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    uint8_t                   security_modeP,
    uint8_t                  *kRRCenc_pP,
    uint8_t                  *kRRCint_pP,
    uint8_t                  *kUPenc_pP
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#ifdef Rel10
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,PMCH_InfoList_r9_t*  pmch_InfoList_r9_pP
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#endif
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)
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{
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  long int        rb_id          = 0;
  long int        lc_id          = 0;
  long int        srb_id         = 0;
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  long int        mch_id         = 0;
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  rlc_mode_t      rlc_type       = RLC_MODE_NONE;
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  DRB_Identity_t  drb_id         = 0;
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  DRB_Identity_t *pdrb_id_p      = NULL;
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  uint8_t              drb_sn         = 0;
  uint8_t              srb_sn         = 5; // fixed sn for SRBs
  uint8_t              drb_report     = 0;
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  long int        cnt            = 0;
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  uint16_t header_compression_profile = 0;
  uint32_t action                     = ACTION_ADD;
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  SRB_ToAddMod_t *srb_toaddmod_p = NULL;
  DRB_ToAddMod_t *drb_toaddmod_p = NULL;
  pdcp_t         *pdcp_p         = NULL;
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#ifdef Rel10
  int i,j;
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  MBMS_SessionInfoList_r9_t *mbms_SessionInfoList_r9_p = NULL;
  MBMS_SessionInfo_r9_t     *MBMS_SessionInfo_p        = NULL;
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#endif

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  if (enb_flagP == 0) {
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      LOG_D(PDCP, "[UE %u] CONFIG REQ ASN1 for eNB %u\n", ue_mod_idP, enb_mod_idP);
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  } else {
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      LOG_D(PDCP, "[eNB %u] CONFIG REQ ASN1 for UE %u\n", enb_mod_idP, ue_mod_idP);
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  }
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  // srb2add_list does not define pdcp config, we use rlc info to setup the pdcp dcch0 and dcch1 channels

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  if (srb2add_list_pP != NULL) {
      for (cnt=0;cnt<srb2add_list_pP->list.count;cnt++) {
          srb_id = srb2add_list_pP->list.array[cnt]->srb_Identity;
          srb_toaddmod_p = srb2add_list_pP->list.array[cnt];
          rlc_type = RLC_MODE_AM;
          rb_id = srb_id;
          lc_id = srb_id;

          if (enb_flagP == 0) {
              pdcp_p = &pdcp_array_ue[ue_mod_idP][srb_id];
          } else {
              pdcp_p = &pdcp_array_eNB[enb_mod_idP][ue_mod_idP][srb_id];
          }
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          if (pdcp_p->instanciated_instance == 1) {
              action = ACTION_MODIFY;
          } else {
              action = ACTION_ADD;
          }
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          if (srb_toaddmod_p->rlc_Config) {
              switch (srb_toaddmod_p->rlc_Config->present) {
              case SRB_ToAddMod__rlc_Config_PR_NOTHING:
                break;
              case SRB_ToAddMod__rlc_Config_PR_explicitValue:
                switch (srb_toaddmod_p->rlc_Config->choice.explicitValue.present) {
                case RLC_Config_PR_NOTHING:
                  break;
                default:
                  pdcp_config_req_asn1 (pdcp_p,
                      enb_mod_idP,
                      ue_mod_idP,
                      frameP,
                      enb_flagP, // not really required
                      rlc_type,
                      action,
                      lc_id,
                      mch_id,
                      rb_id,
                      srb_sn,
                      0, // drb_report
                      0, // header compression
                      security_modeP,
                      kRRCenc_pP,
                      kRRCint_pP,
                      kUPenc_pP);
                  break;
                }
                break;
                case SRB_ToAddMod__rlc_Config_PR_defaultValue:
                  // already the default values
                  break;
                default:
                  DevParam(srb_toaddmod_p->rlc_Config->present, ue_mod_idP, enb_mod_idP);
                  break;
              }
          }
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      }
  }
  // reset the action

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  if (drb2add_list_pP != NULL) {
      for (cnt=0;cnt<drb2add_list_pP->list.count;cnt++) {
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          drb_toaddmod_p = drb2add_list_pP->list.array[cnt];
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          drb_id = drb_toaddmod_p->drb_Identity;
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          if (drb_toaddmod_p->logicalChannelIdentity != null) {
              lc_id = *drb_toaddmod_p->logicalChannelIdentity;
          } else {
              lc_id = -1;
          }
          rb_id = lc_id;
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          DevCheck4(rb_id < NB_RB_MAX, rb_id, NB_RB_MAX, ue_mod_idP, enb_mod_idP);
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          if (enb_flagP == 0) {
              pdcp_p = &pdcp_array_ue[ue_mod_idP][rb_id];
          } else {
              pdcp_p = &pdcp_array_eNB[enb_mod_idP][ue_mod_idP][rb_id];
          }
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          if (pdcp_p->instanciated_instance == 1)
            action = ACTION_MODIFY;
          else
            action = ACTION_ADD;

          if (drb_toaddmod_p->pdcp_Config){
              if (drb_toaddmod_p->pdcp_Config->discardTimer) {
                  // set the value of the timer
              }
              if (drb_toaddmod_p->pdcp_Config->rlc_AM) {
                  drb_report = drb_toaddmod_p->pdcp_Config->rlc_AM->statusReportRequired;
                  rlc_type =RLC_MODE_AM;
              }
              if (drb_toaddmod_p->pdcp_Config->rlc_UM){
                  drb_sn = drb_toaddmod_p->pdcp_Config->rlc_UM->pdcp_SN_Size;
                  rlc_type =RLC_MODE_UM;
              }
              switch (drb_toaddmod_p->pdcp_Config->headerCompression.present) {
              case PDCP_Config__headerCompression_PR_NOTHING:
              case PDCP_Config__headerCompression_PR_notUsed:
                header_compression_profile=0x0;
                break;
              case PDCP_Config__headerCompression_PR_rohc:
                // parse the struc and get the rohc profile
                if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0001)
                  header_compression_profile=0x0001;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0002)
                  header_compression_profile=0x0002;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0003)
                  header_compression_profile=0x0003;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0004)
                  header_compression_profile=0x0004;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0006)
                  header_compression_profile=0x0006;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0101)
                  header_compression_profile=0x0101;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0102)
                  header_compression_profile=0x0102;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0103)
                  header_compression_profile=0x0103;
                else if(drb_toaddmod_p->pdcp_Config->headerCompression.choice.rohc.profiles.profile0x0104)
                  header_compression_profile=0x0104;
                else {
                    header_compression_profile=0x0;
                    LOG_W(PDCP,"unknown header compresion profile\n");
                }
                // set the applicable profile
                break;
              default:
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                LOG_W(PDCP,"[MOD_id %u/%u][RB %u] unknown drb_toaddmod->PDCP_Config->headerCompression->present \n",
                    enb_mod_idP, ue_mod_idP, drb_id);
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                break;
              }
              pdcp_config_req_asn1 (pdcp_p,
                  enb_mod_idP,
                  ue_mod_idP,
                  frameP,
                  enb_flagP, // not really required
                  rlc_type,
                  action,
                  lc_id,
                  mch_id,
                  rb_id,
                  drb_sn,
                  drb_report,
                  header_compression_profile,
                  security_modeP,
                  kRRCenc_pP,
                  kRRCint_pP,
                  kUPenc_pP);
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          }
      }
  }

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  if (drb2release_list_pP != NULL) {
      for (cnt=0;cnt<drb2release_list_pP->list.count;cnt++) {
          pdrb_id_p = drb2release_list_pP->list.array[cnt];
          rb_id =  *pdrb_id_p;
          if (enb_flagP == 0) {
              pdcp_p = &pdcp_array_ue[ue_mod_idP][rb_id];
          } else {
              pdcp_p = &pdcp_array_eNB[enb_mod_idP][ue_mod_idP][rb_id];
          }
          action = ACTION_REMOVE;
          pdcp_config_req_asn1 (pdcp_p,
              enb_mod_idP,
              ue_mod_idP,
              frameP,
              enb_flagP, // not really required
              rlc_type,
              action,
              lc_id,
              mch_id,
              rb_id,
              0,
              0,
              0,
              security_modeP,
              kRRCenc_pP,
              kRRCint_pP,
              kUPenc_pP);
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      }
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  }

#ifdef Rel10
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  if (pmch_InfoList_r9_pP != NULL) {
      for (i=0;i<pmch_InfoList_r9_pP->list.count;i++) {
          mbms_SessionInfoList_r9_p = &(pmch_InfoList_r9_pP->list.array[i]->mbms_SessionInfoList_r9);
          for (j=0;j<mbms_SessionInfoList_r9_p->list.count;j++) {
              MBMS_SessionInfo_p = mbms_SessionInfoList_r9_p->list.array[j];
              lc_id = MBMS_SessionInfo_p->sessionId_r9->buf[0];
              mch_id = MBMS_SessionInfo_p->tmgi_r9.serviceId_r9.buf[2]; //serviceId is 3-octet string
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              // can set the mch_id = i
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              if (enb_flagP) {
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                rb_id =  (mch_id * maxSessionPerPMCH ) + lc_id; // 1
                if (pdcp_mbms_array_eNB[enb_mod_idP][mch_id][lc_id].instanciated_instance == enb_mod_idP + 1)
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                  action = ACTION_MBMS_MODIFY;
                else
                  action = ACTION_MBMS_ADD;
              } else {
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                rb_id =  (mch_id * maxSessionPerPMCH ) + lc_id + (maxDRB + 3); // 15
                if (pdcp_mbms_array_ue[ue_mod_idP][mch_id][lc_id].instanciated_instance == ue_mod_idP + 1)
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                  action = ACTION_MBMS_MODIFY;
                else
                  action = ACTION_MBMS_ADD;
              }

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              pdcp_config_req_asn1 (NULL,  // unused for MBMS
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                  enb_mod_idP,
                  ue_mod_idP,
                  frameP,
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                  enb_flagP,
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                  RLC_MODE_NONE,
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                  action,
                  lc_id,
                  mch_id,
                  rb_id,
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                  0,   // unused for MBMS
                  0,   // unused for MBMS
                  0,   // unused for MBMS
                  0,   // unused for MBMS
                  NULL,  // unused for MBMS
                  NULL,  // unused for MBMS
                  NULL); // unused for MBMS
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          }
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      }
  }
#endif

  return 1;

}

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boolean_t pdcp_config_req_asn1 (pdcp_t   *pdcp_pP,
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    module_id_t     enb_mod_idP,
    module_id_t     ue_mod_idP,
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    frame_t         frameP,
    eNB_flag_t      enb_flagP,
    rlc_mode_t      rlc_modeP,
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    uint32_t             actionP,
    uint16_t             lc_idP,
    uint16_t             mch_idP,
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    rb_id_t         rb_idP,
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    uint8_t              rb_snP,
    uint8_t              rb_reportP,
    uint16_t             header_compression_profileP,
    uint8_t              security_modeP,
    uint8_t             *kRRCenc_pP,
    uint8_t             *kRRCint_pP,
    uint8_t             *kUPenc_pP)
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{
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  switch (actionP) {
  case ACTION_ADD:
    DevAssert(pdcp_pP != NULL);
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    pdcp_pP->instanciated_instance      = 1;
    pdcp_pP->is_ue                      = (enb_flagP == 0) ? 1 : 0;
    pdcp_pP->lcid                       = lc_idP;
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    pdcp_pP->header_compression_profile = header_compression_profileP;
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    pdcp_pP->status_report              = rb_reportP;
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    if (rb_snP == PDCP_Config__rlc_UM__pdcp_SN_Size_len7bits) {
        pdcp_pP->seq_num_size = 7;
    } else if (rb_snP == PDCP_Config__rlc_UM__pdcp_SN_Size_len12bits) {
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        pdcp_pP->seq_num_size = 12;
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    } else {
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        pdcp_pP->seq_num_size = 5;
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    }
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    pdcp_pP->rlc_mode                  = rlc_modeP;
    pdcp_pP->next_pdcp_tx_sn           = 0;
    pdcp_pP->next_pdcp_rx_sn           = 0;
    pdcp_pP->tx_hfn                    = 0;
    pdcp_pP->rx_hfn                    = 0;
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    pdcp_pP->last_submitted_pdcp_rx_sn = 4095;
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    pdcp_pP->first_missing_pdu         = -1;
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    if (enb_flagP == 0) {
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        LOG_I(PDCP, "[UE %d] Config request : Action ADD for eNB %d: Frame %d LCID %d (rb id %d) "
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            "configured with SN size %d bits and RLC %s\n",
            ue_mod_idP, enb_mod_idP, frameP, lc_idP, rb_idP, pdcp_pP->seq_num_size,
            (rlc_modeP == 1) ? "AM" : (rlc_modeP == 2) ? "TM" : "UM");
    } else {
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        LOG_I(PDCP, "[eNB %d] Config request : Action ADD for UE %d: Frame %d LCID %d (rb id %d) "
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            "configured with SN size %d bits and RLC %s\n",
            enb_mod_idP, ue_mod_idP, frameP, lc_idP, rb_idP, pdcp_pP->seq_num_size,
            (rlc_modeP == 1) ? "AM" : (rlc_modeP == 2) ? "TM" : "UM");
    }
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    /* Setup security */
    if (security_modeP != 0xff) {
        pdcp_config_set_security(pdcp_pP, enb_mod_idP, ue_mod_idP, frameP, enb_flagP, rb_idP, lc_idP, security_modeP, kRRCenc_pP, kRRCint_pP, kUPenc_pP);
    }
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    LOG_D(PDCP, "[FRAME %5u][%s][PDCP][MOD %u/%u][RB %u]\n", frameP, (enb_flagP == 0) ? "UE" : "eNB",  enb_mod_idP, ue_mod_idP, rb_idP);
    break;
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  case ACTION_MODIFY:
    DevAssert(pdcp_pP != NULL);
    pdcp_pP->header_compression_profile=header_compression_profileP;
    pdcp_pP->status_report = rb_reportP;
    pdcp_pP->rlc_mode = rlc_modeP;
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    /* Setup security */
    if (security_modeP != 0xff) {
        pdcp_config_set_security(pdcp_pP, enb_mod_idP, ue_mod_idP, frameP, enb_flagP, rb_idP, lc_idP, security_modeP, kRRCenc_pP, kRRCint_pP, kUPenc_pP);
    }
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    if (rb_snP == PDCP_Config__rlc_UM__pdcp_SN_Size_len7bits) {
        pdcp_pP->seq_num_size = 7;
    } else if (rb_snP == PDCP_Config__rlc_UM__pdcp_SN_Size_len12bits) {
        pdcp_pP->seq_num_size = 12;
    } else {
        pdcp_pP->seq_num_size=5;
    }
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    if (enb_flagP == 0) {
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        LOG_I(PDCP,"[UE %d] Config request : Action MODIFY for eNB %d: Frame %d LCID %d "
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            "RB id %d configured with SN size %d and RLC %s \n",
            ue_mod_idP, enb_mod_idP, frameP, lc_idP, rb_idP, rb_snP,
            (rlc_modeP == 1) ? "AM" : (rlc_modeP == 2) ? "TM" : "UM");
    } else {
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        LOG_I(PDCP,"[eNB %d] Config request : Action MODIFY for UE %d: Frame %d LCID %d "
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            "RB id %d configured with SN size %d and RLC %s \n",
            enb_mod_idP, ue_mod_idP, frameP, lc_idP, rb_idP, rb_snP,
            (rlc_modeP == 1) ? "AM" : (rlc_modeP == 2) ? "TM" : "UM");
    }
    break;
  case ACTION_REMOVE:
    DevAssert(pdcp_pP != NULL);
    pdcp_pP->instanciated_instance = 0;
    pdcp_pP->lcid = 0;
    pdcp_pP->header_compression_profile = 0x0;
    pdcp_pP->cipheringAlgorithm = 0xff;
    pdcp_pP->integrityProtAlgorithm = 0xff;
    pdcp_pP->status_report = 0;
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    pdcp_pP->rlc_mode = RLC_MODE_NONE;
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    pdcp_pP->next_pdcp_tx_sn = 0;
    pdcp_pP->next_pdcp_rx_sn = 0;
    pdcp_pP->tx_hfn = 0;
    pdcp_pP->rx_hfn = 0;
    pdcp_pP->last_submitted_pdcp_rx_sn = 4095;
    pdcp_pP->seq_num_size = 0;
    pdcp_pP->first_missing_pdu = -1;
    pdcp_pP->security_activated = 0;

    if (enb_flagP == 0) {
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        LOG_I(PDCP, "[UE %d] Config request : ACTION_REMOVE for eNB %d: Frame %d LCID %d RBID %d configured\n",
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            ue_mod_idP, enb_mod_idP, frameP, lc_idP, rb_idP);
    } else {
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        LOG_I(PDCP, "[eNB %d] Config request : ACTION_REMOVE for UE %d: Frame %d LCID %d RBID %d configured\n",
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            enb_mod_idP, ue_mod_idP, frameP, lc_idP, rb_idP);
    }
    /* Security keys */
    if (pdcp_pP->kUPenc != NULL) {
        free(pdcp_pP->kUPenc);
    }
    if (pdcp_pP->kRRCint != NULL) {
        free(pdcp_pP->kRRCint);
    }
    if (pdcp_pP->kRRCenc != NULL) {
        free(pdcp_pP->kRRCenc);
    }
    break;
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#if defined(Rel10)
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  case ACTION_MBMS_ADD:
  case ACTION_MBMS_MODIFY:
    if (enb_flagP == 0) {
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        LOG_I(PDCP,"[UE %d] Config request for eNB %d: %s: Frame %d service_id/mch index %d, session_id/lcid %d, rbid %d configured\n",
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            ue_mod_idP, enb_mod_idP, actionP == ACTION_MBMS_ADD ? "ACTION_MBMS_ADD" : "ACTION_MBMS_MODIFY", frameP, mch_idP, lc_idP, rb_idP);
    } else {
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        LOG_I(PDCP,"[eNB %d] Config request for UE %d: %s: Frame %d service_id/mch index %d, session_id/lcid %d, rbid %d configured\n",
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            enb_mod_idP, ue_mod_idP, actionP == ACTION_MBMS_ADD ? "ACTION_MBMS_ADD" : "ACTION_MBMS_MODIFY", frameP, mch_idP, lc_idP, rb_idP);
    }
    if (enb_flagP == 1) {
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        pdcp_mbms_array_eNB[enb_mod_idP][mch_idP][lc_idP].instanciated_instance = 1 ;
        pdcp_mbms_array_eNB[enb_mod_idP][mch_idP][lc_idP].rb_id = rb_idP;
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    } else {
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        pdcp_mbms_array_eNB[ue_mod_idP][mch_idP][lc_idP].instanciated_instance = 1 ;
        pdcp_mbms_array_eNB[ue_mod_idP][mch_idP][lc_idP].rb_id = rb_idP;
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    }
    break;
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#endif
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  case ACTION_SET_SECURITY_MODE:
    pdcp_config_set_security(pdcp_pP, enb_mod_idP, ue_mod_idP, frameP, enb_flagP, rb_idP, lc_idP, security_modeP, kRRCenc_pP, kRRCint_pP, kUPenc_pP);
    break;
  default:
    DevParam(actionP, enb_mod_idP, ue_mod_idP);
    break;
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  }
  return 0;
}
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void pdcp_config_set_security(pdcp_t    *pdcp_pP,
    module_id_t     enb_mod_idP,
    module_id_t     ue_mod_idP,
    frame_t    frameP,
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    eNB_flag_t enb_flagP,
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    rb_id_t    rb_idP,
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    uint16_t        lc_idP,
    uint8_t         security_modeP,
    uint8_t        *kRRCenc,
    uint8_t        *kRRCint,
    uint8_t        *kUPenc)
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{
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  DevAssert(pdcp_pP != NULL);
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  if ((security_modeP >= 0) && (security_modeP <= 0x77)) {
      pdcp_pP->cipheringAlgorithm     = security_modeP & 0x0f;
      pdcp_pP->integrityProtAlgorithm = (security_modeP>>4) & 0xf;
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      if (enb_flagP == 0) {
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          LOG_D(PDCP,"[UE %d][RB %02d] Set security mode : ACTION_SET_SECURITY_MODE: "
              "Frame %d  cipheringAlgorithm %d integrityProtAlgorithm %d\n",
              ue_mod_idP, rb_idP, frameP, pdcp_pP->cipheringAlgorithm, pdcp_pP->integrityProtAlgorithm);
      } else {
          LOG_D(PDCP,"[eNB %d][UE %d][RB %02d] Set security mode : ACTION_SET_SECURITY_MODE: "
              "Frame %d  cipheringAlgorithm %d integrityProtAlgorithm %d\n",
              enb_mod_idP, ue_mod_idP, rb_idP, frameP, pdcp_pP->cipheringAlgorithm, pdcp_pP->integrityProtAlgorithm);
      }
      pdcp_pP->kRRCenc = kRRCenc;
      pdcp_pP->kRRCint = kRRCint;
      pdcp_pP->kUPenc  = kUPenc;
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      /* Activate security */
      pdcp_pP->security_activated = 1;
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  } else {
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      LOG_E(PDCP,"[%s %d] bad security mode %d", security_modeP);
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  }
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}

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void rrc_pdcp_config_req (module_id_t enb_mod_idP, module_id_t ue_mod_idP, frame_t frameP, eNB_flag_t enb_flagP, uint32_t actionP, rb_id_t rb_idP, uint8_t security_modeP)
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{
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  pdcp_t *pdcp_p = NULL;
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  if (enb_mod_idP == 0) {
      pdcp_p = &pdcp_array_ue[ue_mod_idP][rb_idP];
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  } else {
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      pdcp_p = &pdcp_array_eNB[enb_mod_idP][ue_mod_idP][rb_idP];
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  }
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  /*
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   * Initialize sequence number state variables of relevant PDCP entity
   */
  switch (actionP) {
  case ACTION_ADD:
    pdcp_p->instanciated_instance = 1;

    pdcp_p->next_pdcp_tx_sn = 0;
    pdcp_p->next_pdcp_rx_sn = 0;
    pdcp_p->tx_hfn = 0;
    pdcp_p->rx_hfn = 0;
    /* SN of the last PDCP SDU delivered to upper layers */
    pdcp_p->last_submitted_pdcp_rx_sn = 4095;

    if (rb_idP < DTCH) { // SRB
        pdcp_p->seq_num_size = 5;
    } else { // DRB
        pdcp_p->seq_num_size = 12;
    }
    pdcp_p->first_missing_pdu = -1;
    LOG_D(PDCP,"[%s %d] Config request : Action ADD: Frame %d radio bearer id %d configured\n",
        (enb_flagP) ? "eNB" : "UE", (enb_flagP) ? enb_mod_idP : ue_mod_idP, frameP, rb_idP);
    break;
  case ACTION_MODIFY:
    break;
  case ACTION_REMOVE:
    pdcp_p->instanciated_instance = 0;
    pdcp_p->next_pdcp_tx_sn = 0;
    pdcp_p->next_pdcp_rx_sn = 0;
    pdcp_p->tx_hfn = 0;
    pdcp_p->rx_hfn = 0;
    pdcp_p->last_submitted_pdcp_rx_sn = 4095;
    pdcp_p->seq_num_size = 0;
    pdcp_p->first_missing_pdu = -1;
    pdcp_p->security_activated = 0;
    LOG_D(PDCP,"[%s %d] Config request : ACTION_REMOVE: Frame %d radio bearer id %d configured\n",
        (enb_flagP) ? "eNB" : "UE",  (enb_flagP) ? enb_mod_idP : ue_mod_idP, frameP, rb_idP);

    break;
  case ACTION_SET_SECURITY_MODE:
    if ((security_modeP >= 0) && (security_modeP <= 0x77)) {
        pdcp_p->cipheringAlgorithm= security_modeP & 0x0f;
        pdcp_p->integrityProtAlgorithm = (security_modeP>>4) & 0xf;
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        LOG_D(PDCP,"[%s %d]Set security mode : ACTION_SET_SECURITY_MODE: Frame %d  cipheringAlgorithm %d integrityProtAlgorithm %d\n",
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            (enb_flagP) ? "eNB" : "UE",  (enb_flagP) ? enb_mod_idP : ue_mod_idP, frameP,
                pdcp_p->cipheringAlgorithm,
                pdcp_p->integrityProtAlgorithm );
    } else {
        LOG_D(PDCP,"[%s %d] bad security mode %d", security_modeP);
    }
    break;
  default:
    DevParam(actionP, ue_mod_idP, enb_mod_idP);
    break;
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  }
}

// TODO PDCP module initialization code might be removed
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int pdcp_module_init (void) {
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  //-----------------------------------------------------------------------------
#ifdef NAS_FIFO
  int ret;

  ret=rtf_create(PDCP2NAS_FIFO,32768);

  if (ret < 0) {
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      LOG_E(PDCP, "Cannot create PDCP2NAS fifo %d (ERROR %d)\n", PDCP2NAS_FIFO, ret);
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      return -1;
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  } else {
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      LOG_D(PDCP, "Created PDCP2NAS fifo %d\n", PDCP2NAS_FIFO);
      rtf_reset(PDCP2NAS_FIFO);
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  }

  ret=rtf_create(NAS2PDCP_FIFO,32768);

  if (ret < 0) {
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      LOG_E(PDCP, "Cannot create NAS2PDCP fifo %d (ERROR %d)\n", NAS2PDCP_FIFO, ret);
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      return -1;
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  } else {
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      LOG_D(PDCP, "Created NAS2PDCP fifo %d\n", NAS2PDCP_FIFO);
      rtf_reset(NAS2PDCP_FIFO);
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  }

  pdcp_2_nas_irq = 0;
  pdcp_input_sdu_remaining_size_to_read=0;
  pdcp_input_sdu_size_read=0;
#endif

  return 0;

}

//-----------------------------------------------------------------------------
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void pdcp_module_cleanup (void)
//-----------------------------------------------------------------------------
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{
#ifdef NAS_FIFO
  rtf_destroy(NAS2PDCP_FIFO);
  rtf_destroy(PDCP2NAS_FIFO);
#endif
}

//-----------------------------------------------------------------------------
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void pdcp_layer_init(void)
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{
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  //-----------------------------------------------------------------------------
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  module_id_t       instance;
  module_id_t       instance2;
  rb_id_t           rb_id;
#if defined(Rel10)
  mbms_session_id_t session_id;
  mbms_service_id_t service_id;
#endif
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  /*
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   * Initialize SDU list
   */
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  list_init(&pdcp_sdu_list, NULL);

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  for (instance = 0; instance < NUMBER_OF_UE_MAX; instance++) {
      for (rb_id = 0; rb_id < NB_RB_MAX; rb_id++) {
          memset(&pdcp_array_ue[instance][rb_id], 0, sizeof(pdcp_t));
      }
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#if defined(Rel10)
      for (service_id = 0; service_id < maxServiceCount; service_id++) {
          for (session_id = 0; session_id < maxSessionPerPMCH; session_id++) {
              memset(&pdcp_mbms_array_ue[instance][service_id][session_id], 0, sizeof(pdcp_mbms_t));
          }
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      }
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#endif
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  }
  for (instance = 0; instance < NUMBER_OF_eNB_MAX; instance++) {
      for (instance2 = 0; instance2 < NUMBER_OF_UE_MAX; instance2++) {
          for (rb_id = 0; rb_id < NB_RB_MAX; rb_id++) {
              memset(&pdcp_array_eNB[instance][instance2][rb_id], 0, sizeof(pdcp_t));
          }
      }
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#if defined(Rel10)
      for (service_id = 0; service_id < maxServiceCount; service_id++) {
          for (session_id = 0; session_id < maxSessionPerPMCH; session_id++) {
              memset(&pdcp_mbms_array_eNB[instance][service_id][session_id], 0, sizeof(pdcp_mbms_t));
          }
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      }
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#endif
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  }
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  LOG_I(PDCP, "PDCP layer has been initialized\n");
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  pdcp_output_sdu_bytes_to_write=0;
  pdcp_output_header_bytes_to_write=0;
  pdcp_input_sdu_remaining_size_to_read=0;
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  memset(Pdcp_stats_tx, 0, sizeof(Pdcp_stats_tx));
  memset(Pdcp_stats_tx_bytes, 0, sizeof(Pdcp_stats_tx_bytes));
  memset(Pdcp_stats_tx_bytes_last, 0, sizeof(Pdcp_stats_tx_bytes_last));
  memset(Pdcp_stats_tx_rate, 0, sizeof(Pdcp_stats_tx_rate));

  memset(Pdcp_stats_rx, 0, sizeof(Pdcp_stats_rx));
  memset(Pdcp_stats_rx_bytes, 0, sizeof(Pdcp_stats_rx_bytes));
  memset(Pdcp_stats_rx_bytes_last, 0, sizeof(Pdcp_stats_rx_bytes_last));
  memset(Pdcp_stats_rx_rate, 0, sizeof(Pdcp_stats_rx_rate));
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}

//-----------------------------------------------------------------------------
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void pdcp_layer_cleanup (void)
//-----------------------------------------------------------------------------
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{
  list_free (&pdcp_sdu_list);
}

#ifdef NAS_FIFO
EXPORT_SYMBOL(pdcp_2_nas_irq);
#endif //NAS_FIFO