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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(
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        const module_id_t    enb_mod_idP,
        const module_id_t    ue_mod_idP,
        const frame_t        frameP,
        const eNB_flag_t     enb_flagP,
        const srb_flag_t     srb_flagP,
        const rb_id_t        rb_idP,
        const mui_t          muiP,
        const confirm_t      confirmP,
        const sdu_size_t     sdu_buffer_sizeP,
        unsigned char *const sdu_buffer_pP,
        const 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);
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  if (modeP == PDCP_TRANSMISSION_MODE_TRANSPARENT) {
      AssertError (rb_idP < NB_RB_MBMS_MAX, return FALSE, "RB id is too high (%u/%d) %u %u!\n", rb_idP, NB_RB_MBMS_MAX, ue_mod_idP, enb_mod_idP);
  } else {
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      if (srb_flagP) {
          AssertError (rb_idP < 2, return FALSE, "RB id is too high (%u/%d) %u %u!\n", rb_idP, 2, ue_mod_idP, enb_mod_idP);
      } else {
          AssertError (rb_idP < maxDRB, return FALSE, "RB id is too high (%u/%d) %u %u!\n", rb_idP, maxDRB, ue_mod_idP, enb_mod_idP);
      }
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  }
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  if (enb_flagP == ENB_FLAG_NO) {
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      if (srb_flagP) {
          pdcp_p = &pdcp_array_srb_ue[ue_mod_idP][rb_idP-1];
  } else {
          pdcp_p = &pdcp_array_drb_ue[ue_mod_idP][rb_idP-1];
      }
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  } else {
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      if (srb_flagP) {
          pdcp_p = &pdcp_array_srb_eNB[enb_mod_idP][ue_mod_idP][rb_idP-1];
      } else {
          pdcp_p = &pdcp_array_drb_eNB[enb_mod_idP][ue_mod_idP][rb_idP-1];
      }
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  }
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  if ((pdcp_p->instanciated_instance == FALSE) && (modeP != PDCP_TRANSMISSION_MODE_TRANSPARENT)) {
      if (enb_flagP == ENB_FLAG_NO) {
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          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 == ENB_FLAG_NO)
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    start_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
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  else
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    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_util_print_hex_octets(PDCP,
                                    (unsigned char*)&pdcp_pdu_p->data[0],
                                    sdu_buffer_sizeP);

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          rlc_status = rlc_data_req(enb_mod_idP, ue_mod_idP, frameP, enb_flagP, srb_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;
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	LOG_W(PDCP,"[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);
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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
      }
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  } else {
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      // calculate the pdcp header and trailer size
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      if (srb_flagP) {
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          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
           */

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          if (srb_flagP) { // this Control plane PDCP Data PDU
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              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 == ENB_FLAG_NO)
                    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 == ENB_FLAG_NO)
                    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 == ENB_FLAG_NO)
                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_p->security_activated != 0) &&
              ((pdcp_p->cipheringAlgorithm) != 0) &&
              ((pdcp_p->integrityProtAlgorithm) != 0)) {
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	    if (enb_flagP == ENB_FLAG_NO)
	      start_meas(&eNB_pdcp_stats[enb_mod_idP].apply_security);
	    else
	      start_meas(&UE_pdcp_stats[ue_mod_idP].apply_security);
	    
	    pdcp_apply_security(pdcp_p, rb_idP % maxDRB,
				pdcp_header_len, current_sn, pdcp_pdu_p->data,
				sdu_buffer_sizeP);
	    if (enb_flagP == ENB_FLAG_NO)
	      stop_meas(&eNB_pdcp_stats[enb_mod_idP].apply_security);
	    else
	      stop_meas(&UE_pdcp_stats[ue_mod_idP].apply_security);
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          }
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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 == ENB_FLAG_NO)
              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, srb_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 == ENB_FLAG_NO)
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    stop_meas(&eNB_pdcp_stats[enb_mod_idP].data_req);
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  else
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    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
   */
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  /*
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   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(
        const module_id_t enb_mod_idP,
        const module_id_t ue_mod_idP,
        const frame_t frameP,
        const eNB_flag_t enb_flagP,
        const srb_flag_t srb_flagP,
        const MBMS_flag_t MBMS_flagP,
        const rb_id_t rb_idP,
        const sdu_size_t sdu_buffer_sizeP,
        mem_block_t* const sdu_buffer_pP)
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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;
  rb_id_t      rb_id           = rb_idP;
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  if (enb_flagP)
    start_meas(&eNB_pdcp_stats[enb_mod_idP].data_ind);
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  else
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    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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  if (MBMS_flagP) {
      AssertError (rb_idP < NB_RB_MBMS_MAX, return FALSE, "RB id is too high (%u/%d) %u %u!\n", rb_idP, NB_RB_MBMS_MAX, ue_mod_idP, enb_mod_idP);
      if (enb_flagP == ENB_FLAG_NO) {
          LOG_I(PDCP, "e-MBMS Data indication notification for PDCP entity from eNB %u to UE %u "
                "and radio bearer ID %d rlc sdu size %d enb_flagP %d\n",
                enb_mod_idP, ue_mod_idP, rb_idP, sdu_buffer_sizeP, enb_flagP);
      } else {
          LOG_I(PDCP, "Data indication notification for PDCP entity from UE %u to eNB %u "
          "and radio bearer ID %d rlc sdu size %d enb_flagP %d eNB_id %d\n",
          ue_mod_idP, enb_mod_idP , rb_idP, sdu_buffer_sizeP, enb_flagP, enb_mod_idP);
      }
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  } else {
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      rb_id = rb_idP % maxDRB;
      AssertError (rb_id < maxDRB, return FALSE, "RB id is too high (%u/%d) %u %u!\n", rb_id, maxDRB, ue_mod_idP, enb_mod_idP);

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      if (enb_flagP == ENB_FLAG_NO) {
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          if (srb_flagP) {
              pdcp_p = &pdcp_array_srb_ue[ue_mod_idP][rb_id-1];
              LOG_I(PDCP, "Data indication notification for PDCP entity from eNB %u to UE %u "
                    "and signalling radio bearer ID %d rlc sdu size %d enb_flagP %d\n",
                    enb_mod_idP, ue_mod_idP, rb_id, sdu_buffer_sizeP, enb_flagP);
          } else {
              pdcp_p = &pdcp_array_drb_ue[ue_mod_idP][rb_id-1];
              LOG_I(PDCP, "Data indication notification for PDCP entity from eNB %u to UE %u "
                    "and data radio bearer ID %d rlc sdu size %d enb_flagP %d\n",
                    enb_mod_idP, ue_mod_idP, rb_id, sdu_buffer_sizeP, enb_flagP);
          }
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      } else {
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          if (srb_flagP) {
              pdcp_p = &pdcp_array_srb_eNB[enb_mod_idP][ue_mod_idP][rb_id-1];
              LOG_I(PDCP, "Data indication notification for PDCP entity from UE %u to eNB %u "
                  "and signalling radio bearer ID %d rlc sdu size %d enb_flagP %d eNB_id %d\n",
                  ue_mod_idP, enb_mod_idP , rb_id, sdu_buffer_sizeP, enb_flagP, enb_mod_idP);
          } else {
              pdcp_p = &pdcp_array_drb_eNB[enb_mod_idP][ue_mod_idP][rb_id-1];
              LOG_I(PDCP, "Data indication notification for PDCP entity from UE %u to eNB %u "
                  "and data radio bearer ID %d rlc sdu size %d enb_flagP %d eNB_id %d\n",
                  ue_mod_idP, enb_mod_idP , rb_id, sdu_buffer_sizeP, enb_flagP, enb_mod_idP);
          }
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      }
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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);
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      else
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	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 (srb_flagP) {
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          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
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      if (srb_flagP){
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#if defined(ENABLE_SECURITY)
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	if (pdcp_p->security_activated == 1) {
	  if (enb_flagP == ENB_FLAG_NO)
	    start_meas(&eNB_pdcp_stats[enb_mod_idP].validate_security);
	  else
	    start_meas(&UE_pdcp_stats[ue_mod_idP].validate_security);
	  
	  pdcp_validate_security(pdcp_p, rb_idP, pdcp_header_len,
				 sequence_number, sdu_buffer_pP->data,
				 sdu_buffer_sizeP - pdcp_tailer_len);
	  if (enb_flagP == ENB_FLAG_NO)
	    stop_meas(&eNB_pdcp_stats[enb_mod_idP].validate_security);
	  else
	    stop_meas(&UE_pdcp_stats[ue_mod_idP].validate_security);
	   
	}
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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,
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              rb_id,
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              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)
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            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_p->security_activated == 1) {
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          pdcp_validate_security(pdcp_p, rb_idP % maxDRB, pdcp_header_len,
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              sequence_number, sdu_buffer_pP->data,
              sdu_buffer_sizeP - pdcp_tailer_len);
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      }
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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;
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      rlc_util_print_hex_octets(PDCP,
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                                (unsigned char*)&sdu_buffer_pP->data[payload_offset],
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                                sdu_buffer_sizeP - payload_offset);
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      src_id = (enb_flagP != 0) ? ue_mod_idP : enb_mod_idP;
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      dst_id = (enb_flagP == ENB_FLAG_NO) ? ue_mod_idP : enb_mod_idP;
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      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",
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          enb_flagP, rb_id, src_id, dst_id);
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      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)
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             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);
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      else
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	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
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      if (enb_flagP == ENB_FLAG_NO) {
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          ((pdcp_data_ind_header_t *) new_sdu_p->data)->rb_id = rb_id;
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#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 {
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          ((pdcp_data_ind_header_t *) new_sdu_p->data)->rb_id = rb_id + (ue_mod_idP * maxDRB);
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#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,
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            rb_id);
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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);
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  else
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    stop_meas(&UE_pdcp_stats[ue_mod_idP].data_ind);
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  return TRUE;
}

//-----------------------------------------------------------------------------
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void pdcp_run (
        const frame_t frameP,
        const eNB_flag_t  enb_flagP,
        const module_id_t ue_mod_idP,
        const 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);
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  else
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    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,
                SRB_FLAG_YES,
                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);
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            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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#if defined(USER_MODE) && defined(OAI_EMU)
  pdcp_t            *pdcp_p          = NULL;
  // add other rb_ids 
  if (enb_flagP == ENB_FLAG_NO) {
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      pdcp_p = &pdcp_array_drb_ue[ue_mod_idP][DTCH-1];
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  } else {
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      pdcp_p = &pdcp_array_drb_eNB[enb_mod_idP][ue_mod_idP][DTCH-1];
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  }

  if (pdcp_p->instanciated_instance  == TRUE )
    pdcp_fifo_read_input_sdus_from_otg(frameP, enb_flagP, ue_mod_idP, enb_mod_idP);
#endif 
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  // IP/NAS -> PDCP traffic : TX, read the pkt from the upper layer buffer
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#if defined(LINK_PDCP_TO_GTPV1U)
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  if (enb_flagP == ENB_FLAG_NO)
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#endif
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  {
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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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  if (enb_flagP)
    start_meas(&eNB_pdcp_stats[enb_mod_idP].pdcp_ip);
  else
    start_meas(&UE_pdcp_stats[ue_mod_idP].pdcp_ip);
  
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  pdcp_fifo_flush_sdus(frameP, enb_flagP, enb_mod_idP, ue_mod_idP);
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  if (enb_flagP)
    stop_meas(&eNB_pdcp_stats[enb_mod_idP].pdcp_ip);
  else
    stop_meas(&UE_pdcp_stats[ue_mod_idP].pdcp_ip);

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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_PDCP_RUN, VCD_FUNCTION_OUT);
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  if (enb_flagP)
    stop_meas(&eNB_pdcp_stats[enb_mod_idP].pdcp_run);
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  else
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    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 (
        const module_id_t               enb_mod_idP,
        const module_id_t               ue_mod_idP,
        const frame_t              frameP,
        const eNB_flag_t           enb_flagP,
        SRB_ToAddModList_t  *const srb2add_list_pP,
        DRB_ToAddModList_t  *const drb2add_list_pP,
        DRB_ToReleaseList_t *const drb2release_list_pP,
        const uint8_t                   security_modeP,
        uint8_t                  *const kRRCenc_pP,
        uint8_t                  *const kRRCint_pP,
        uint8_t                  *const kUPenc_pP
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#ifdef Rel10
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,PMCH_InfoList_r9_t*  const pmch_InfoList_r9_pP
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#endif
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)
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{
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  long int        lc_id          = 0;
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  DRB_Identity_t  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;
  config_action_t action                     = CONFIG_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 == ENB_FLAG_NO) {
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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;
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          lc_id = srb_id + 2;
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          if (enb_flagP == ENB_FLAG_NO) {
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              pdcp_p = &pdcp_array_srb_ue[ue_mod_idP][srb_id-1];
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          } else {
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              pdcp_p = &pdcp_array_srb_eNB[enb_mod_idP][ue_mod_idP][srb_id-1];
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          }
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          if (pdcp_p->instanciated_instance == TRUE) {
              action = CONFIG_ACTION_MODIFY;
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          } else {
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              action = CONFIG_ACTION_ADD;
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          }
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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
897
                      SRB_FLAG_YES,
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                      rlc_type,
                      action,
                      lc_id,
                      mch_id,
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                      srb_id,
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                      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

925 926
  if (drb2add_list_pP != NULL) {
      for (cnt=0;cnt<drb2add_list_pP->list.count;cnt++) {
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928
          drb_toaddmod_p = drb2add_list_pP->list.array[cnt];
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          drb_id = drb_toaddmod_p->drb_Identity ;// + drb_id_offset;

          lc_id = drb_id + 2;
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935
          DevCheck4(drb_id < maxDRB, drb_id, maxDRB, ue_mod_idP, enb_mod_idP);
936

937
          if (enb_flagP == ENB_FLAG_NO) {
938
              pdcp_p = &pdcp_array_drb_ue[ue_mod_idP][drb_id-1];
939
          } else {
940
              pdcp_p = &pdcp_array_drb_eNB[enb_mod_idP][ue_mod_idP][drb_id-1];
941
          }
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943 944
          if (pdcp_p->instanciated_instance == TRUE)
            action = CONFIG_ACTION_MODIFY;
945
          else
946
            action = CONFIG_ACTION_ADD;
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          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
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                  SRB_FLAG_NO,
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                  rlc_type,
                  action,
                  lc_id,
                  mch_id,
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                  drb_id,
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                  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];
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          drb_id =  *pdrb_id_p;
          lc_id = drb_id + 2;
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          if (enb_flagP == ENB_FLAG_NO) {
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              pdcp_p = &pdcp_array_drb_ue[ue_mod_idP][drb_id-1];
1025
          } else {
1026
              pdcp_p = &pdcp_array_drb_eNB[enb_mod_idP][ue_mod_idP][drb_id-1];
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          }
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          action = CONFIG_ACTION_REMOVE;
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          pdcp_config_req_asn1 (pdcp_p,
              enb_mod_idP,
              ue_mod_idP,
              frameP,
              enb_flagP, // not really required
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              SRB_FLAG_NO,
1035 1036 1037 1038
              rlc_type,
              action,
              lc_id,
              mch_id,
1039
              drb_id,
1040 1041 1042 1043 1044 1045 1046
              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
1058 1059

              // can set the mch_id = i
1060
              if (enb_flagP) {
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                  drb_id =  (mch_id * maxSessionPerPMCH ) + lc_id + (maxDRB + 3)*MAX_MOBILES_PER_ENB; // 1
                  if (pdcp_mbms_array_eNB[enb_mod_idP][mch_id][lc_id].instanciated_instance == TRUE) {
                      action = CONFIG_ACTION_MBMS_MODIFY;
                  }else {
                      action = CONFIG_ACTION_MBMS_ADD;
                  }
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              } else {
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                  drb_id =  (mch_id * maxSessionPerPMCH ) + lc_id + (maxDRB + 3); // 15
                  if (pdcp_mbms_array_ue[ue_mod_idP][mch_id][lc_id].instanciated_instance == TRUE) {
                      action = CONFIG_ACTION_MBMS_MODIFY;
                  } else {
                      action = CONFIG_ACTION_MBMS_ADD;
                  }
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              }

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              pdcp_config_req_asn1 (
                  NULL,  // unused for MBMS
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                  enb_mod_idP,
                  ue_mod_idP,
                  frameP,
1081
                  enb_flagP,
1082
                  SRB_FLAG_NO,
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                  RLC_MODE_NONE,
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                  action,
                  lc_id,
                  mch_id,
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                  drb_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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1104
boolean_t pdcp_config_req_asn1 (pdcp_t   *pdcp_pP,
1105 1106
    module_id_t     enb_mod_idP,
    module_id_t     ue_mod_idP,
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    frame_t         frameP,
    eNB_flag_t      enb_flagP,
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    srb_flag_t      srb_flagP,
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    rlc_mode_t      rlc_modeP,
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    config_action_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)
1122
{
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1124
  switch (actionP) {
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  case CONFIG_ACTION_ADD:
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    DevAssert(pdcp_pP != NULL);
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    pdcp_pP->instanciated_instance      = TRUE;
    pdcp_pP->is_ue                      = (enb_flagP == ENB_FLAG_NO) ? TRUE : FALSE;
1129
    pdcp_pP->is_srb                     = (srb_flagP == SRB_FLAG_YES) ? TRUE : FALSE;
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    pdcp_pP->lcid                       = lc_idP;
1131
    pdcp_pP->rb_id                      = rb_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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    }
1142

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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;
1150

1151
    if (enb_flagP == ENB_FLAG_NO) {
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        LOG_I(PDCP, "[UE %d] Config request : Action ADD for eNB %d: Frame %d LCID %d (rb id %d) "
1153 1154 1155 1156
            "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) "
1158 1159 1160 1161
            "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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1163 1164 1165 1166
    /* 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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1168
    LOG_D(PDCP, "[FRAME %5u][%s][PDCP][MOD %u/%u][RB %u]\n", frameP, (enb_flagP == ENB_FLAG_NO) ? "UE" : "eNB",  enb_mod_idP, ue_mod_idP, rb_idP);
1169
    break;
1170

1171
  case CONFIG_ACTION_MODIFY:
1172 1173 1174 1175
    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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1177 1178 1179 1180
    /* 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;
    }
1189

1190
    if (enb_flagP == ENB_FLAG_NO) {
1191
        LOG_I(PDCP,"[UE %d] Config request : Action MODIFY for eNB %d: Frame %d LCID %d "
1192 1193 1194 1195
            "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 {
1196
        LOG_I(PDCP,"[eNB %d] Config request : Action MODIFY for UE %d: Frame %d LCID %d "
1197 1198 1199 1200 1201
            "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;
1202
  case CONFIG_ACTION_REMOVE:
1203
    DevAssert(pdcp_pP != NULL);
1204
    pdcp_pP->instanciated_instance = FALSE;
1205 1206 1207 1208 1209
    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;

1220 1221
    if (enb_flagP == ENB_FLAG_NO) {
        LOG_I(PDCP, "[UE %d] Config request : CONFIG_ACTION_REMOVE for eNB %d: Frame %d LCID %d RBID %d configured\n",
1222 1223
            ue_mod_idP, enb_mod_idP, frameP, lc_idP, rb_idP);
    } else {
1224
        LOG_I(PDCP, "[eNB %d] Config request : CONFIG_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)
1239 1240 1241
  case CONFIG_ACTION_MBMS_ADD:
  case CONFIG_ACTION_MBMS_MODIFY:
    if (enb_flagP == ENB_FLAG_NO) {
1242
        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",
1243
            ue_mod_idP, enb_mod_idP, actionP == CONFIG_ACTION_MBMS_ADD ? "CONFIG_ACTION_MBMS_ADD" : "CONFIG_ACTION_MBMS_MODIFY", frameP, mch_idP, lc_idP, rb_idP);
1244
    } else {
1245
        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",
1246
            enb_mod_idP, ue_mod_idP, actionP == CONFIG_ACTION_MBMS_ADD ? "CONFIG_ACTION_MBMS_ADD" : "CONFIG_ACTION_MBMS_MODIFY", frameP, mch_idP, lc_idP, rb_idP);
1247 1248
    }
    if (enb_flagP == 1) {
1249
        pdcp_mbms_array_eNB[enb_mod_idP][mch_idP][lc_idP].instanciated_instance = TRUE ;
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        pdcp_mbms_array_eNB[enb_mod_idP][mch_idP][lc_idP].rb_id = rb_idP;
1251
    } else {
1252 1253
        pdcp_mbms_array_ue[ue_mod_idP][mch_idP][lc_idP].instanciated_instance = TRUE ;
        pdcp_mbms_array_ue[ue_mod_idP][mch_idP][lc_idP].rb_id = rb_idP;
1254 1255
    }
    break;
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#endif
1257
  case CONFIG_ACTION_SET_SECURITY_MODE:
1258 1259 1260 1261 1262
    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;
1263 1264 1265
  }
  return 0;
}
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1267 1268 1269 1270
void pdcp_config_set_security(pdcp_t    *pdcp_pP,
    module_id_t     enb_mod_idP,
    module_id_t     ue_mod_idP,
    frame_t    frameP,
1271
    eNB_flag_t enb_flagP,
1272
    rb_id_t    rb_idP,
1273 1274 1275 1276 1277
    uint16_t        lc_idP,
    uint8_t         security_modeP,
    uint8_t        *kRRCenc,
    uint8_t        *kRRCint,
    uint8_t        *kUPenc)
1278
{
1279
  DevAssert(pdcp_pP != NULL);
1280

1281 1282 1283
  if ((security_modeP >= 0) && (security_modeP <= 0x77)) {
      pdcp_pP->cipheringAlgorithm     = security_modeP & 0x0f;
      pdcp_pP->integrityProtAlgorithm = (security_modeP>>4) & 0xf;
1284

1285 1286
      if (enb_flagP == ENB_FLAG_NO) {
          LOG_D(PDCP,"[UE %d][RB %02d] Set security mode : CONFIG_ACTION_SET_SECURITY_MODE: "
1287
              "Frame %d  cipheringAlgorithm %d integrityProtAlgorithm %d\n",
1288 1289 1290 1291 1292
              ue_mod_idP,
              rb_idP,
              frameP,
              pdcp_pP->cipheringAlgorithm,
              pdcp_pP->integrityProtAlgorithm);
1293
      } else {
1294
          LOG_D(PDCP,"[eNB %d][UE %d][RB %02d] Set security mode : CONFIG_ACTION_SET_SECURITY_MODE: "
1295
              "Frame %d  cipheringAlgorithm %d integrityProtAlgorithm %d\n",
1296 1297 1298 1299 1300 1301
              enb_mod_idP,
              ue_mod_idP,
              rb_idP,
              frameP,
              pdcp_pP->cipheringAlgorithm,
              pdcp_pP->integrityProtAlgorithm);
1302 1303 1304 1305
      }
      pdcp_pP->kRRCenc = kRRCenc;
      pdcp_pP->kRRCint = kRRCint;
      pdcp_pP->kUPenc  = kUPenc;
1306

1307 1308
      /* Activate security */
      pdcp_pP->security_activated = 1;
1309
  } else {
1310
      LOG_E(PDCP,"[%s %d] bad security mode %d", security_modeP);
1311
  }
1312 1313
}

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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, srb_flag_t srb_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_flagP == ENB_FLAG_NO) {
      if (srb_flagP) {
          pdcp_p = &pdcp_array_srb_ue[ue_mod_idP][rb_idP-1];
      } else {
          pdcp_p = &pdcp_array_drb_ue[ue_mod_idP][rb_idP-1];
      }
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  } else {
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      if (srb_flagP) {
          pdcp_p = &pdcp_array_srb_eNB[enb_mod_idP][ue_mod_idP][rb_idP-1];
      } else {
          pdcp_p = &pdcp_array_drb_eNB[enb_mod_idP][ue_mod_idP][rb_idP-1];
      }
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  }
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  /*
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   * Initialize sequence number state variables of relevant PDCP entity
   */
  switch (actionP) {
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  case CONFIG_ACTION_ADD:
    pdcp_p->instanciated_instance = TRUE;
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    pdcp_p->is_srb = srb_flagP;
    pdcp_p->rb_id  = rb_idP;
    if (enb_flagP == ENB_FLAG_NO) {
        pdcp_p->is_ue = TRUE;
    } else {
        pdcp_p->is_ue = FALSE;
    }
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    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;
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  case CONFIG_ACTION_MODIFY:
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    break;
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  case CONFIG_ACTION_REMOVE:
    pdcp_p->instanciated_instance = FALSE;
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    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;
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    LOG_D(PDCP,"[%s %d] Config request : CONFIG_ACTION_REMOVE: Frame %d radio bearer id %d configured\n",
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        (enb_flagP) ? "eNB" : "UE",  (enb_flagP) ? enb_mod_idP : ue_mod_idP, frameP, rb_idP);

    break;
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  case CONFIG_ACTION_SET_SECURITY_MODE:
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    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 : CONFIG_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++) {
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      for (rb_id = 0; rb_id < maxDRB; rb_id++) {
          memset(&pdcp_array_drb_ue[instance][rb_id-1], 0, sizeof(pdcp_t));
      }
      for (rb_id = 0; rb_id < 2; rb_id++) {
          memset(&pdcp_array_srb_ue[instance][rb_id-1], 0, sizeof(pdcp_t));
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      }
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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++) {
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          for (rb_id = 0; rb_id < maxDRB; rb_id++) {
              memset(&pdcp_array_drb_eNB[instance][instance2][rb_id-1], 0, sizeof(pdcp_t));
          }
          for (rb_id = 0; rb_id < 2; rb_id++) {
              memset(&pdcp_array_srb_eNB[instance][instance2][rb_id-1], 0, sizeof(pdcp_t));
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          }
      }
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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