L2_interface.c 15.7 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450
/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*! \file l2_interface.c
 * \brief layer 2 interface, used to support different RRC sublayer
 * \author Raymond Knopp and Navid Nikaein
 * \date 2010-2014
 * \version 1.0
 * \company Eurecom
 * \email: raymond.knopp@eurecom.fr
 */

/*! \file l2_interface.c
 * \brief layer 2 interface, added support for FeMBMS RRC sublayer 
 * \author Javier Morgade
 * \date 2020
 * \version 1.0
 * \email: javier.morgade@ieee.org
 */


#include "platform_types.h"
#include "rrc_defs.h"
#include "rrc_extern.h"
#include "common/utils/LOG/log.h"
#include "rrc_eNB_UE_context.h"
#include "pdcp.h"
#include "msc.h"
#include "common/ran_context.h"

#include "intertask_interface.h"

#include "flexran_agent_extern.h"
#undef C_RNTI // C_RNTI is used in F1AP generated code, prevent preprocessor replace
//#include "f1ap_du_rrc_message_transfer.h"
#include "openair2/F1AP/f1ap_du_rrc_message_transfer.h"

extern RAN_CONTEXT_t RC;

//------------------------------------------------------------------------------
int8_t
mac_rrc_data_req(
  const module_id_t Mod_idP,
  const int         CC_id,
  const frame_t     frameP,
  const rb_id_t     Srb_id,
  const rnti_t      rnti,
  const uint8_t     Nb_tb,
  uint8_t    *const buffer_pP,
  const uint8_t     mbsfn_sync_area
)
//--------------------------------------------------------------------------
{
  asn_enc_rval_t enc_rval;
  SRB_INFO *Srb_info;
  uint8_t Sdu_size                = 0;
  uint8_t sfn                     = (uint8_t)((frameP>>2)&0xff);

  uint8_t sfn_fembms              = (uint8_t)((frameP>>4)&0xff);
  sfn_fembms = sfn_fembms<<2;

  if (LOG_DEBUGFLAG(DEBUG_RRC)) {
    LOG_D(RRC,"[eNB %d] mac_rrc_data_req to SRB ID=%ld\n",Mod_idP,Srb_id);
  }

  eNB_RRC_INST *rrc;
  rrc_eNB_carrier_data_t *carrier;
  LTE_BCCH_BCH_Message_t *mib;
  LTE_BCCH_BCH_Message_MBMS_t *mib_fembms;
  rrc     = RC.rrc[Mod_idP];
  carrier = &rrc->carrier[0];
  mib     = &carrier->mib;
  mib_fembms     = &carrier->mib_fembms;

  if((Srb_id & RAB_OFFSET) == BCCH_SI_MBMS){
    if (frameP%8 == 0) {
      memcpy(&buffer_pP[0],
             RC.rrc[Mod_idP]->carrier[CC_id].SIB1_MBMS,
             RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1_MBMS);

      if (LOG_DEBUGFLAG(DEBUG_RRC)) {
        LOG_T(RRC,"[eNB %d] Frame %d : BCCH request => SIB 1 MBMS\n",Mod_idP,frameP);

        for (int i=0; i<RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1_MBMS; i++) {
          LOG_T(RRC,"%x.",buffer_pP[i]);
        }

        LOG_T(RRC,"\n");
      } /* LOG_DEBUGFLAG(DEBUG_RRC) */

      return (RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1_MBMS);
    }
  }

  if((Srb_id & RAB_OFFSET) == BCCH) {
    if(RC.rrc[Mod_idP]->carrier[CC_id].SI.Active==0) {
      return 0;
    }

    // All even frames transmit SIB in SF 5
    AssertFatal(RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1 != 255,
                "[eNB %d] MAC Request for SIB1 and SIB1 not initialized\n",Mod_idP);

    if ((frameP%2) == 0) {
      memcpy(&buffer_pP[0],
             RC.rrc[Mod_idP]->carrier[CC_id].SIB1,
             RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1);

      if (LOG_DEBUGFLAG(DEBUG_RRC)) {
        LOG_T(RRC,"[eNB %d] Frame %d : BCCH request => SIB 1\n",Mod_idP,frameP);

        for (int i=0; i<RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1; i++) {
          LOG_T(RRC,"%x.",buffer_pP[i]);
        }

        LOG_T(RRC,"\n");
      } /* LOG_DEBUGFLAG(DEBUG_RRC) */

      return (RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1);
    } // All RFN mod 8 transmit SIB2-3 in SF 5
    else if ((frameP%8) == 1) {
      memcpy(&buffer_pP[0],
             RC.rrc[Mod_idP]->carrier[CC_id].SIB23,
             RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB23);

      if (LOG_DEBUGFLAG(DEBUG_RRC)) {
        LOG_T(RRC,"[eNB %d] Frame %d BCCH request => SIB 2-3\n",Mod_idP,frameP);

        for (int i=0; i<RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB23; i++) {
          LOG_T(RRC,"%x.",buffer_pP[i]);
        }

        LOG_T(RRC,"\n");
      } /* LOG_DEBUGFLAG(DEBUG_RRC) */

      return(RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB23);
    } else {
      return(0);
    }
  }

  if( (Srb_id & RAB_OFFSET ) == MIBCH) {
    mib->message.systemFrameNumber.buf = &sfn;
    enc_rval = uper_encode_to_buffer(&asn_DEF_LTE_BCCH_BCH_Message,
                                     NULL,
                                     (void *)mib,
                                     carrier->MIB,
                                     24);
    LOG_D(RRC,"Encoded MIB for frame %d (%p), bits %lu\n",sfn,carrier->MIB,enc_rval.encoded);
    buffer_pP[0]=carrier->MIB[0];
    buffer_pP[1]=carrier->MIB[1];
    buffer_pP[2]=carrier->MIB[2];
    AssertFatal (enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %lu)!\n",
                 enc_rval.failed_type->name, enc_rval.encoded);
    return(3);
  }

  if( (Srb_id & RAB_OFFSET ) == MIBCH_MBMS) {
    mib_fembms->message.systemFrameNumber_r14.buf = &sfn_fembms;
    enc_rval = uper_encode_to_buffer(&asn_DEF_LTE_BCCH_BCH_Message_MBMS,
                                     NULL,
                                     (void *)mib_fembms,
                                     carrier->MIB_FeMBMS,
                                     24);
    LOG_I(RRC,"Encoded MIB MBMS for frame %d (%p), bits %lu %x,%x,%x %x bits_unused %d\n",sfn_fembms>>2,carrier->MIB_FeMBMS,enc_rval.encoded,carrier->MIB_FeMBMS[0],carrier->MIB_FeMBMS[1],carrier->MIB_FeMBMS[2],mib_fembms->message.systemFrameNumber_r14.buf[0],mib_fembms->message.systemFrameNumber_r14.bits_unused);
    buffer_pP[0]=carrier->MIB_FeMBMS[0];
    buffer_pP[1]=carrier->MIB_FeMBMS[1];
    buffer_pP[2]=carrier->MIB_FeMBMS[2];
    AssertFatal (enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %lu)!\n",
                 enc_rval.failed_type->name, enc_rval.encoded);
    return(3);
  }

  if( (Srb_id & RAB_OFFSET ) == CCCH) {
    struct rrc_eNB_ue_context_s *ue_context_p = rrc_eNB_get_ue_context(RC.rrc[Mod_idP],rnti);

    if (ue_context_p == NULL) return(0);

    eNB_RRC_UE_t *ue_p = &ue_context_p->ue_context;
    LOG_T(RRC,"[eNB %d] Frame %d CCCH request (Srb_id %ld, rnti %x)\n",Mod_idP,frameP, Srb_id,rnti);
    Srb_info=&ue_p->Srb0;

    // check if data is there for MAC
    if(Srb_info->Tx_buffer.payload_size>0) { //Fill buffer
      LOG_D(RRC,"[eNB %d] CCCH (%p) has %d bytes (dest: %p, src %p)\n",Mod_idP,Srb_info,Srb_info->Tx_buffer.payload_size,buffer_pP,Srb_info->Tx_buffer.Payload);
      memcpy(buffer_pP,Srb_info->Tx_buffer.Payload,Srb_info->Tx_buffer.payload_size);
      Sdu_size = Srb_info->Tx_buffer.payload_size;
      Srb_info->Tx_buffer.payload_size=0;
    }

    return (Sdu_size);
  }

  if( (Srb_id & RAB_OFFSET ) == PCCH) {
    LOG_T(RRC,"[eNB %d] Frame %d PCCH request (Srb_id %ld)\n",Mod_idP,frameP, Srb_id);

    // check if data is there for MAC
    if(RC.rrc[Mod_idP]->carrier[CC_id].sizeof_paging[mbsfn_sync_area] > 0) { //Fill buffer
      LOG_D(RRC,"[eNB %d] PCCH (%p) has %d bytes\n",Mod_idP,&RC.rrc[Mod_idP]->carrier[CC_id].paging[mbsfn_sync_area],
            RC.rrc[Mod_idP]->carrier[CC_id].sizeof_paging[mbsfn_sync_area]);
      memcpy(buffer_pP, RC.rrc[Mod_idP]->carrier[CC_id].paging[mbsfn_sync_area], RC.rrc[Mod_idP]->carrier[CC_id].sizeof_paging[mbsfn_sync_area]);
      Sdu_size = RC.rrc[Mod_idP]->carrier[CC_id].sizeof_paging[mbsfn_sync_area];
      RC.rrc[Mod_idP]->carrier[CC_id].sizeof_paging[mbsfn_sync_area] = 0;
    }

    return (Sdu_size);
  }

  if((Srb_id & RAB_OFFSET) == MCCH) {
    if(RC.rrc[Mod_idP]->carrier[CC_id].MCCH_MESS[mbsfn_sync_area].Active==0) {
      return 0;  // this parameter is set in function init_mcch in rrc_eNB.c
    }

    memcpy(&buffer_pP[0],
           RC.rrc[Mod_idP]->carrier[CC_id].MCCH_MESSAGE[mbsfn_sync_area],
           RC.rrc[Mod_idP]->carrier[CC_id].sizeof_MCCH_MESSAGE[mbsfn_sync_area]);

      LOG_D(RRC,"[eNB %d] Frame %d : MCCH request => MCCH_MESSAGE \n",Mod_idP,frameP);

    if (LOG_DEBUGFLAG(DEBUG_RRC)) {
      LOG_D(RRC,"[eNB %d] Frame %d : MCCH request => MCCH_MESSAGE \n",Mod_idP,frameP);

      for (int i=0; i<RC.rrc[Mod_idP]->carrier[CC_id].sizeof_MCCH_MESSAGE[mbsfn_sync_area]; i++) {
        LOG_T(RRC,"%x.",buffer_pP[i]);
      }

      LOG_T(RRC,"\n");
    } /* LOG_DEBUGFLAG(DEBUG_RRC) */

    return (RC.rrc[Mod_idP]->carrier[CC_id].sizeof_MCCH_MESSAGE[mbsfn_sync_area]);
  }

  if((Srb_id & RAB_OFFSET) == MCCH_COUNTING) {
    if(RC.rrc[Mod_idP]->carrier[CC_id].MCCH_MESS_COUNTING[mbsfn_sync_area].Active==0) {
      return 0;  // this parameter is set in function init_mcch in rrc_eNB.c
    }

    memcpy(&buffer_pP[0],
           RC.rrc[Mod_idP]->carrier[CC_id].MCCH_MESSAGE_COUNTING[mbsfn_sync_area],
           RC.rrc[Mod_idP]->carrier[CC_id].sizeof_MCCH_MESSAGE_COUNTING[mbsfn_sync_area]);

    if (LOG_DEBUGFLAG(DEBUG_RRC)) {
      LOG_W(RRC,"[eNB %d] Frame %d : MCCH request => MCCH_MESSAGE_COUNTING \n",Mod_idP,frameP);

      for (int i=0; i<RC.rrc[Mod_idP]->carrier[CC_id].sizeof_MCCH_MESSAGE_COUNTING[mbsfn_sync_area]; i++) {
        LOG_T(RRC,"%x.",buffer_pP[i]);
      }

      LOG_T(RRC,"\n");
    } /* LOG_DEBUGFLAG(DEBUG_RRC) */

    return (RC.rrc[Mod_idP]->carrier[CC_id].sizeof_MCCH_MESSAGE_COUNTING[mbsfn_sync_area]);
  }


  if ((Srb_id & RAB_OFFSET) == BCCH_SIB1_BR) {
    memcpy(&buffer_pP[0],
           RC.rrc[Mod_idP]->carrier[CC_id].SIB1_BR,
           RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1_BR);
    return (RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1_BR);
  }

  if ((Srb_id & RAB_OFFSET) == BCCH_SI_BR) { // First SI message with SIB2/3
    memcpy(&buffer_pP[0],
           RC.rrc[Mod_idP]->carrier[CC_id].SIB23_BR,
           RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB23_BR);
    return (RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB23_BR);
  }

  return(0);
}


//------------------------------------------------------------------------------
int8_t
mac_rrc_data_ind(
  const module_id_t     module_idP,
  const int             CC_id,
  const frame_t         frameP,
  const sub_frame_t     sub_frameP,
  const int             UE_id,
  const rnti_t          rntiP,
  const rb_id_t         srb_idP,
  const uint8_t        *sduP,
  const sdu_size_t      sdu_lenP,
  const uint8_t         mbsfn_sync_areaP,
  const boolean_t   brOption
)
//--------------------------------------------------------------------------
{
  if (NODE_IS_DU(RC.rrc[module_idP]->node_type)) {
    LOG_W(RRC,"[DU %d][RAPROC] Received SDU for CCCH on SRB %ld length %d for UE id %d RNTI %x \n",
          module_idP, srb_idP, sdu_lenP, UE_id, rntiP);
    /* do ITTI message */
    DU_send_INITIAL_UL_RRC_MESSAGE_TRANSFER(
      module_idP,
      CC_id,
      UE_id,
      rntiP,
      sduP,
      sdu_lenP
    );
    return(0);
  }

  //SRB_INFO *Srb_info;
  protocol_ctxt_t ctxt;
  sdu_size_t      sdu_size = 0;
  /* for no gcc warnings */
  (void)sdu_size;
  /*
  int si_window;
   */
  PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, module_idP, ENB_FLAG_YES, rntiP, frameP, sub_frameP,0);

  if((srb_idP & RAB_OFFSET) == CCCH) {
    LOG_D(RRC, "[eNB %d] Received SDU for CCCH on SRB %ld\n", module_idP, srb_idP);
    ctxt.brOption = brOption;

    /*Srb_info = &RC.rrc[module_idP]->carrier[CC_id].Srb0;
    if (sdu_lenP > 0) {
      memcpy(Srb_info->Rx_buffer.Payload,sduP,sdu_lenP);
      Srb_info->Rx_buffer.payload_size = sdu_lenP;
      rrc_eNB_decode_ccch(&ctxt, Srb_info, CC_id);
    }*/
    if (sdu_lenP > 0)  rrc_eNB_decode_ccch(&ctxt, sduP, sdu_lenP, CC_id);
  }

  if((srb_idP & RAB_OFFSET) == DCCH) {
    struct rrc_eNB_ue_context_s    *ue_context_p = NULL;
    ue_context_p = rrc_eNB_get_ue_context(RC.rrc[ctxt.module_id],rntiP);

    if(ue_context_p) {
      if (ue_context_p->ue_context.StatusRrc != RRC_RECONFIGURED) {
        LOG_E(RRC,"[eNB %d] Received C-RNTI ,but UE %x status(%d) not RRC_RECONFIGURED\n",module_idP,rntiP,ue_context_p->ue_context.StatusRrc);
        return (-1);
      } 
      rrc_eNB_generate_defaultRRCConnectionReconfiguration(&ctxt,ue_context_p,0);
      ue_context_p->ue_context.StatusRrc = RRC_RECONFIGURED;
    }
  }

  return(0);
}

//------------------------------------------------------------------------------
/*
* Get RRC status (Connected, Idle...) of UE from RNTI
*/
int
mac_eNB_get_rrc_status(
  const module_id_t Mod_idP,
  const rnti_t      rntiP
)
//------------------------------------------------------------------------------
{
  struct rrc_eNB_ue_context_s *ue_context_p = NULL;
  ue_context_p = rrc_eNB_get_ue_context(RC.rrc[Mod_idP], rntiP);

  if (ue_context_p != NULL) {
    return(ue_context_p->ue_context.StatusRrc);
  } else {
    return RRC_INACTIVE;
  }
}

void mac_eNB_rrc_ul_failure(const module_id_t Mod_instP,
                            const int CC_idP,
                            const frame_t frameP,
                            const sub_frame_t subframeP,
                            const rnti_t rntiP) {
  struct rrc_eNB_ue_context_s *ue_context_p = NULL;
  ue_context_p = rrc_eNB_get_ue_context(
                   RC.rrc[Mod_instP],
                   rntiP);

  if (ue_context_p != NULL) {
    LOG_I(RRC,"Frame %d, Subframe %d: UE %x UL failure, activating timer\n",frameP,subframeP,rntiP);

    if(ue_context_p->ue_context.ul_failure_timer == 0)
      ue_context_p->ue_context.ul_failure_timer=1;
  } else {
    LOG_W(RRC,"Frame %d, Subframe %d: UL failure: UE %x unknown \n",frameP,subframeP,rntiP);
  }

  if (flexran_agent_get_rrc_xface(Mod_instP)) {
    flexran_agent_get_rrc_xface(Mod_instP)->flexran_agent_notify_ue_state_change(Mod_instP,
        rntiP, PROTOCOL__FLEX_UE_STATE_CHANGE_TYPE__FLUESC_DEACTIVATED);
  }

  //rrc_mac_remove_ue(Mod_instP,rntiP);
}

void mac_eNB_rrc_uplane_failure(const module_id_t Mod_instP,
                                const int CC_idP,
                                const frame_t frameP,
                                const sub_frame_t subframeP,
                                const rnti_t rntiP) {
  struct rrc_eNB_ue_context_s *ue_context_p = NULL;
  ue_context_p = rrc_eNB_get_ue_context(
                   RC.rrc[Mod_instP],
                   rntiP);

  if (ue_context_p != NULL) {
    LOG_I(RRC,"Frame %d, Subframe %d: UE %x U-Plane failure, activating timer\n",frameP,subframeP,rntiP);

    if(ue_context_p->ue_context.ul_failure_timer == 0)
      ue_context_p->ue_context.ul_failure_timer=19999;
  } else {
    LOG_W(RRC,"Frame %d, Subframe %d: U-Plane failure: UE %x unknown \n",frameP,subframeP,rntiP);
  }
}

void mac_eNB_rrc_ul_in_sync(const module_id_t Mod_instP,
                            const int CC_idP,
                            const frame_t frameP,
                            const sub_frame_t subframeP,
                            const rnti_t rntiP) {
  struct rrc_eNB_ue_context_s *ue_context_p = NULL;
  ue_context_p = rrc_eNB_get_ue_context(
                   RC.rrc[Mod_instP],
                   rntiP);

  if (ue_context_p != NULL) {
    LOG_I(RRC,"Frame %d, Subframe %d: UE %x to UL in synch\n",
          frameP, subframeP, rntiP);
    ue_context_p->ue_context.ul_failure_timer = 0;
  } else {
    LOG_E(RRC,"Frame %d, Subframe %d: UE %x unknown \n",
          frameP, subframeP, rntiP);
  }
}