rlc_am_retransmit.c 43.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
/*
 * 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 1.0  (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
 */

22 23
#define RLC_AM_MODULE 1
#define RLC_AM_RETRANSMIT_C 1
24 25 26 27 28 29 30
//-----------------------------------------------------------------------------
//#include "rtos_header.h"
//-----------------------------------------------------------------------------
#include "rlc_am.h"
#include "rlc.h"
#include "LAYER2/MAC/extern.h"
#include "UTIL/LOG/log.h"
31
#include "msc.h"
32
//-----------------------------------------------------------------------------
33
void rlc_am_nack_pdu (
34 35 36 37 38
  const protocol_ctxt_t* const  ctxt_pP,
  rlc_am_entity_t *const rlc_pP,
  const rlc_sn_t snP,
  const sdu_size_t so_startP,
  const sdu_size_t so_endP)
39
{
40 41 42 43 44 45 46 47 48 49 50
  // 5.2.1 Retransmission
  // ...
  // When an AMD PDU or a portion of an AMD PDU is considered for retransmission, the transmitting side of the AM
  // RLC entity shall:
  //     - if the AMD PDU is considered for retransmission for the first time:
  //         - set the RETX_COUNT associated with the AMD PDU to zero;
  //     - else, if it (the AMD PDU or the portion of the AMD PDU that is considered for retransmission) is not pending
  //            for retransmission already, or a portion of it is not pending for retransmission already:
  //         - increment the RETX_COUNT;
  //     - if RETX_COUNT = maxRetxThreshold:
  //         - indicate to upper layers that max retransmission has been reached.
51 52


53
  mem_block_t* mb_p         = rlc_pP->tx_data_pdu_buffer[snP].mem_block;
54 55
  int          pdu_sdu_index;
  int          sdu_index;
56

57 58
  if (mb_p != NULL) {
    assert(so_startP <= so_endP);
59

60 61 62 63 64 65
    //-----------------------------------------
    // allow holes in reports
    // it is assumed that hole reports are done in byte offset
    // increasing order among calls refering to only one status PDU
    //  and among time
    //-----------------------------------------
66 67
    if (rlc_pP->tx_data_pdu_buffer[snP].last_nack_time != ctxt_pP->frame) {
      rlc_pP->tx_data_pdu_buffer[snP].last_nack_time = ctxt_pP->frame;
68 69 70 71 72 73 74 75 76 77 78
      rlc_am_clear_holes(ctxt_pP, rlc_pP, snP);
    }

    rlc_am_add_hole(ctxt_pP, rlc_pP, snP, so_startP, so_endP);

    if (rlc_pP->first_retrans_pdu_sn < 0) {
      rlc_pP->first_retrans_pdu_sn = snP;
    } else if (rlc_am_tx_sn1_gt_sn2(ctxt_pP, rlc_pP, rlc_pP->first_retrans_pdu_sn, snP)) {
      rlc_pP->first_retrans_pdu_sn = snP;
    }

79 80
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[NACK-PDU] NACK PDU SN %04d previous retx_count %d  1ST_RETRANS_PDU %04d\n",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
81
          snP,
82
          rlc_pP->tx_data_pdu_buffer[snP].retx_count,
83 84
          rlc_pP->first_retrans_pdu_sn);

85
    rlc_pP->tx_data_pdu_buffer[snP].flags.retransmit = 1;
86

87 88 89 90
    /* TODO : before incrementing retx_count_next, this must be a new occurrence of retransmission */
    if (rlc_pP->tx_data_pdu_buffer[snP].retx_count == rlc_pP->tx_data_pdu_buffer[snP].retx_count_next){
    	rlc_pP->tx_data_pdu_buffer[snP].retx_count_next ++;
    	rlc_pP->retrans_num_bytes_to_retransmit += rlc_pP->tx_data_pdu_buffer[snP].header_and_payload_size;
91 92
    }

93 94 95 96 97
    /* TODO: Move this part in UL SCH processing */
#if 0
    if (rlc_pP->tx_data_pdu_buffer[snP].retx_count >= rlc_pP->max_retx_threshold) {
      for (pdu_sdu_index = 0; pdu_sdu_index < rlc_pP->tx_data_pdu_buffer[snP].nb_sdus; pdu_sdu_index++) {
        sdu_index = rlc_pP->tx_data_pdu_buffer[snP].sdus_index[pdu_sdu_index];
98 99 100 101 102
        assert(pdu_sdu_index < RLC_AM_MAX_SDU_IN_PDU);
        assert(sdu_index < RLC_AM_SDU_CONTROL_BUFFER_SIZE);
        rlc_pP->input_sdus[sdu_index].nb_pdus_ack += 1;

        if (rlc_pP->input_sdus[sdu_index].nb_pdus_ack == rlc_pP->input_sdus[sdu_index].nb_pdus) {
103
#if TEST_RLC_AM
104 105 106 107 108 109
          rlc_am_v9_3_0_test_data_conf (rlc_pP->module_id, rlc_pP->rb_id, rlc_pP->input_sdus[sdu_index].mui, RLC_SDU_CONFIRM_NO);
#else
          rlc_data_conf(ctxt_pP, rlc_pP->rb_id, rlc_pP->input_sdus[sdu_index].mui, RLC_SDU_CONFIRM_NO, rlc_pP->is_data_plane);
#endif
          rlc_pP->stat_tx_pdcp_sdu_discarded   += 1;
          rlc_pP->stat_tx_pdcp_bytes_discarded += rlc_pP->input_sdus[sdu_index].sdu_size;
110 111 112 113 114 115
          MSC_LOG_EVENT((ctxt_pP->enb_flag == ENB_FLAG_YES) ? MSC_RLC_ENB:MSC_RLC_UE,\
                        "0 "PROTOCOL_RLC_AM_MSC_FMT" Dropped SDU mui %u cause max_retx %u reached",\
                        PROTOCOL_RLC_AM_MSC_ARGS(ctxt_pP,rlc_pP),
                        rlc_pP->input_sdus[sdu_index].mui,
                        rlc_pP->max_retx_threshold);

116
          rlc_am_free_in_sdu(ctxt_pP, rlc_pP, sdu_index);
117

118 119
        }
      }
120
    }
121
#endif
122
  } else {
123 124
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[NACK-PDU] ERROR NACK MISSING PDU SN %05d\n",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
125 126 127
          snP);
    //assert(2==3);
  }
128 129
}
//-----------------------------------------------------------------------------
130
void rlc_am_ack_pdu (
131 132 133
  const protocol_ctxt_t* const  ctxt_pP,
  rlc_am_entity_t *const rlc_pP,
  const rlc_sn_t snP)
134
{
135
  mem_block_t* mb_p         = rlc_pP->tx_data_pdu_buffer[snP].mem_block;
136 137
  int          pdu_sdu_index;
  int          sdu_index;
138

139
  rlc_pP->tx_data_pdu_buffer[snP].flags.retransmit = 0;
140

141
  if ((rlc_pP->tx_data_pdu_buffer[snP].flags.ack == 0) && (mb_p != NULL)) {
142
    //if (mb_pP != NULL) {
143
    free_mem_block(mb_p, __func__);
144
    rlc_pP->tx_data_pdu_buffer[snP].mem_block = NULL;
145 146
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[ACK-PDU] ACK PDU SN %05d previous retx_count %d \n",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
147
          snP,
148
          rlc_pP->tx_data_pdu_buffer[snP].retx_count);
149

150 151
    if (rlc_pP->tx_data_pdu_buffer[snP].retx_count >= 0) {
      rlc_pP->retrans_num_bytes_to_retransmit -= rlc_pP->tx_data_pdu_buffer[snP].header_and_payload_size;
152
    }
153

154 155
    for (pdu_sdu_index = 0; pdu_sdu_index < rlc_pP->tx_data_pdu_buffer[snP].nb_sdus; pdu_sdu_index++) {
      sdu_index = rlc_pP->tx_data_pdu_buffer[snP].sdus_index[pdu_sdu_index];
156 157 158
      assert(sdu_index >= 0);
      assert(sdu_index < RLC_AM_SDU_CONTROL_BUFFER_SIZE);
      rlc_pP->input_sdus[sdu_index].nb_pdus_ack += 1;
159

160 161
      if ((rlc_pP->input_sdus[sdu_index].nb_pdus_ack == rlc_pP->input_sdus[sdu_index].nb_pdus) &&
          (rlc_pP->input_sdus[sdu_index].sdu_remaining_size == 0)) {
162
#if TEST_RLC_AM
163 164 165 166 167
        rlc_am_v9_3_0_test_data_conf (
          rlc_pP->module_id,
          rlc_pP->rb_id,
          rlc_pP->input_sdus[sdu_index].mui,
          RLC_SDU_CONFIRM_YES);
168
#else
169 170 171 172 173 174
        rlc_data_conf(
          ctxt_pP,
          rlc_pP->rb_id,
          rlc_pP->input_sdus[sdu_index].mui,
          RLC_SDU_CONFIRM_YES,
          rlc_pP->is_data_plane);
175
#endif
176 177 178 179 180 181 182 183 184
        rlc_am_free_in_sdu(ctxt_pP, rlc_pP, sdu_index);
      }
    }

    // 7.1...
    // VT(A) – Acknowledgement state variable
    // This state variable holds the value of the SN of the next AMD PDU for which a positive acknowledgment is to be
    // received in-sequence, and it serves as the lower edge of the transmitting window. It is initially set to 0, and is updated
    // whenever the AM RLC entity receives a positive acknowledgment for an AMD PDU with SN = VT(A).
185
    rlc_pP->tx_data_pdu_buffer[snP].flags.ack = 1;
186 187

    if (snP == rlc_pP->vt_a) {
188
      //rlc_pP->tx_data_pdu_buffer[snP].flags.ack = 1;
189
      do {
190
        memset(&rlc_pP->tx_data_pdu_buffer[rlc_pP->vt_a], 0, sizeof(rlc_am_tx_data_pdu_management_t));
191 192 193

        if (rlc_pP->vt_a == rlc_pP->first_retrans_pdu_sn) {
          rlc_pP->first_retrans_pdu_sn = (rlc_pP->vt_a  + 1) & RLC_AM_SN_MASK;
194
        }
195 196

        rlc_pP->vt_a = (rlc_pP->vt_a  + 1) & RLC_AM_SN_MASK;
197
      } while ((rlc_pP->tx_data_pdu_buffer[rlc_pP->vt_a].flags.ack == 1) && (rlc_pP->vt_a != rlc_pP->vt_s));
198 199 200


      rlc_pP->vt_ms   = (rlc_pP->vt_a + RLC_AM_WINDOW_SIZE) & RLC_AM_SN_MASK;
201 202
      LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[ACK-PDU] UPDATED VT(A) %04d VT(MS) %04d  VT(S) %04d\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
203 204 205 206 207 208 209 210 211
            rlc_pP->vt_a,
            rlc_pP->vt_ms,
            rlc_pP->vt_s);
    }

    if (snP == rlc_pP->first_retrans_pdu_sn) {
      do {
        rlc_pP->first_retrans_pdu_sn = (rlc_pP->first_retrans_pdu_sn  + 1) & RLC_AM_SN_MASK;

212
        if (rlc_pP->tx_data_pdu_buffer[rlc_pP->first_retrans_pdu_sn].retx_count >= 0) {
213 214
          LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[ACK-PDU] UPDATED  first_retrans_pdu_sn -> %04d\n",
                PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
215 216
                rlc_pP->first_retrans_pdu_sn);
          break;
217
        }
218 219 220 221
      } while (rlc_pP->first_retrans_pdu_sn != rlc_pP->vt_s);

      if (rlc_pP->vt_s == rlc_pP->first_retrans_pdu_sn) {
        rlc_pP->first_retrans_pdu_sn = -1;
222 223
        LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[ACK-PDU] UPDATED  first_retrans_pdu_sn -> %04d\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
224 225 226 227
              rlc_pP->first_retrans_pdu_sn);
      }
    }
  } else {
228 229
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[ACK-PDU] WARNING ACK PDU SN %05d -> NO PDU TO ACK\n",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
230 231 232
          snP);

    if (mb_p != NULL) {
233
      free_mem_block(mb_p, __func__);
234
      rlc_pP->tx_data_pdu_buffer[snP].mem_block = NULL;
235 236
    }

237
    if (rlc_pP->tx_data_pdu_buffer[snP].flags.ack > 0) {
238
      if (snP == rlc_pP->vt_a) {
239
        //rlc_pP->tx_data_pdu_buffer[snP].flags.ack = 1;
240
        do {
241
          memset(&rlc_pP->tx_data_pdu_buffer[rlc_pP->vt_a], 0, sizeof(rlc_am_tx_data_pdu_management_t));
242 243 244 245 246 247

          if (rlc_pP->vt_a == rlc_pP->first_retrans_pdu_sn) {
            rlc_pP->first_retrans_pdu_sn = (rlc_pP->vt_a  + 1) & RLC_AM_SN_MASK;
          }

          rlc_pP->vt_a = (rlc_pP->vt_a  + 1) & RLC_AM_SN_MASK;
248
        } while ((rlc_pP->tx_data_pdu_buffer[rlc_pP->vt_a].flags.ack == 1) && (rlc_pP->vt_a != rlc_pP->vt_s));
249 250

        rlc_pP->vt_ms   = (rlc_pP->vt_a + RLC_AM_WINDOW_SIZE) & RLC_AM_SN_MASK;
251 252
        LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[ACK-PDU] UPDATED VT(A) %04d VT(MS) %04d  VT(S) %04d\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
253 254 255 256
              rlc_pP->vt_a,
              rlc_pP->vt_ms,
              rlc_pP->vt_s);
      }
257
    }
258
  }
259 260
}
//-----------------------------------------------------------------------------
261
mem_block_t* rlc_am_retransmit_get_copy (
262 263 264
  const protocol_ctxt_t* const  ctxt_pP,
  rlc_am_entity_t *const rlc_pP,
  const rlc_sn_t snP)
265
{
266
  mem_block_t* mb_original_p = rlc_pP->tx_data_pdu_buffer[snP].mem_block;
267

268
  if (mb_original_p != NULL) {
269

270
    rlc_am_tx_data_pdu_management_t *pdu_mngt = &rlc_pP->tx_data_pdu_buffer[snP % RLC_AM_PDU_RETRANSMISSION_BUFFER_SIZE];
271

272
    int size             = pdu_mngt->header_and_payload_size + sizeof(struct mac_tb_req);
273
    mem_block_t* mb_copy = get_free_mem_block(size, __func__);
274
    memcpy(mb_copy->data, mb_original_p->data, size);
275

276 277
    rlc_am_pdu_sn_10_t *pdu_p                         = (rlc_am_pdu_sn_10_t*) (&mb_copy->data[sizeof(struct mac_tb_req)]);
    ((struct mac_tb_req*)(mb_copy->data))->data_ptr = (uint8_t*)pdu_p;
278

279 280
    pdu_mngt->flags.retransmit = 0;

fnabet's avatar
fnabet committed
281
    rlc_am_pdu_polling(ctxt_pP, rlc_pP, pdu_p, pdu_mngt->payload_size,false);
282 283 284 285
    return mb_copy;
  } else {
    return NULL;
  }
286 287
}
//-----------------------------------------------------------------------------
288
mem_block_t* rlc_am_retransmit_get_subsegment(
289 290 291 292
  const protocol_ctxt_t* const  ctxt_pP,
  rlc_am_entity_t *const rlc_pP,
  const rlc_sn_t snP,
  sdu_size_t * const sizeP /* in-out*/)
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
{

  // 5.2 ARQ procedures
  // ARQ procedures are only performed by an AM RLC entity.
  // 5.2.1 Retransmission
  // The transmitting side of an AM RLC entity can receive a negative acknowledgement (notification of reception failure
  // by its peer AM RLC entity) for an AMD PDU or a portion of an AMD PDU by the following:
  // - STATUS PDU from its peer AM RLC entity.
  //
  // When receiving a negative acknowledgement for an AMD PDU or a portion of an AMD PDU by a STATUS PDU from
  // its peer AM RLC entity, the transmitting side of the AM RLC entity shall:
  //     - if the SN of the corresponding AMD PDU falls within the range VT(A) <= SN < VT(S):
  //         - consider the AMD PDU or the portion of the AMD PDU for which a negative acknowledgement was
  //           received for retransmission.
  //
  // When an AMD PDU or a portion of an AMD PDU is considered for retransmission, the transmitting side of the AM
  // RLC entity shall:
  //     - if the AMD PDU is considered for retransmission for the first time:
  //         - set the RETX_COUNT associated with the AMD PDU to zero;
  //     - else, if it (the AMD PDU or the portion of the AMD PDU that is considered for retransmission) is not pending
  //       for retransmission already, or a portion of it is not pending for retransmission already:
  //         - increment the RETX_COUNT;
  //     - if RETX_COUNT = maxRetxThreshold:
  //         - indicate to upper layers that max retransmission has been reached.
  //
  // When retransmitting an AMD PDU, the transmitting side of an AM RLC entity shall:
  //     - if the AMD PDU can entirely fit within the total size of RLC PDU(s) indicated by lower layer at the particular
  //       transmission opportunity:
  //         - deliver the AMD PDU as it is except for the P field (the P field should be set according to sub clause 5.2.2) to
  //           lower layer;
  //     - otherwise:
  //         - segment the AMD PDU, form a new AMD PDU segment which will fit within the total size of RLC PDU(s)
  //           indicated by lower layer at the particular transmission opportunity and deliver the new AMD PDU segment
  //           to lower layer.
  //
  // When retransmitting a portion of an AMD PDU, the transmitting side of an AM RLC entity shall:
  //    - segment the portion of the AMD PDU as necessary, form a new AMD PDU segment which will fit within the
  //    total size of RLC PDU(s) indicated by lower layer at the particular transmission opportunity and deliver the new
  //    AMD PDU segment to lower layer.
  //
  // When forming a new AMD PDU segment, the transmitting side of an AM RLC entity shall:
  //    - only map the Data field of the original AMD PDU to the Data field of the new AMD PDU segment;
  //    - set the header of the new AMD PDU segment in accordance with the description in sub clause 6.;
  //    - set the P field according to sub clause 5.2.2.

338
  mem_block_t*           mb_original_p     = rlc_pP->tx_data_pdu_buffer[snP].mem_block;
339 340

  if (mb_original_p != NULL) {
341
    mem_block_t*           mb_sub_segment_p  = get_free_mem_block(*sizeP + sizeof(struct mac_tb_req), __func__);
342 343 344 345 346 347 348 349 350
    rlc_am_pdu_sn_10_t*    pdu_original_p    = (rlc_am_pdu_sn_10_t*) (&mb_original_p->data[sizeof(struct mac_tb_req)]);
    rlc_am_pdu_sn_10_t*    pdu_sub_segment_p = (rlc_am_pdu_sn_10_t*) (&mb_sub_segment_p->data[sizeof(struct mac_tb_req)]);
    rlc_am_pdu_info_t      pdu_info;
    int                    max_copy_payload_size;
    //LG avoid WARNING int                    test_max_copy_payload_size;
    int                    test_pdu_copy_size          = 0;

    ((struct mac_tb_req*)(mb_sub_segment_p->data))->data_ptr         = (uint8_t*)&(mb_sub_segment_p->data[sizeof(struct mac_tb_req)]);

351
    if (rlc_am_get_data_pdu_infos(ctxt_pP, rlc_pP, pdu_original_p, rlc_pP->tx_data_pdu_buffer[snP].header_and_payload_size, &pdu_info) >= 0) {
352
      int li_index = 0;
353 354
      int start_offset       = rlc_pP->tx_data_pdu_buffer[snP].nack_so_start;
      int stop_offset        = rlc_pP->tx_data_pdu_buffer[snP].nack_so_stop;
355

356 357
      LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] ORIGINAL PDU SN %04d:\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
358 359 360 361 362 363
            snP);
      rlc_am_display_data_pdu_infos(ctxt_pP, rlc_pP, &pdu_info);

      // all 15 bits set to 1 (indicate that the missing portion of the AMD PDU includes all bytes
      // to the last byte of the AMD PDU)
      if (stop_offset == 0x7FFF) {
364 365
        rlc_pP->tx_data_pdu_buffer[snP].nack_so_stop = rlc_pP->tx_data_pdu_buffer[snP].payload_size - 1;
        stop_offset = rlc_pP->tx_data_pdu_buffer[snP].nack_so_stop;
366 367 368 369
        LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] UPDATED RETRANS PDU SN %04d nack_so_stop FROM 0x7FFF to %05d\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
              snP,
              stop_offset);
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
      }

      // FIXED PART AMD PDU SEGMENT HEADER
      // 6.2.1.5 AMD PDU segment
      // AMD PDU segment consists of a Data field and an AMD PDU segment header.
      //
      // AMD PDU segment header consists of a fixed part (fields that are present for every AMD PDU segment) and an
      // extension part (fields that are present for an AMD PDU segment when necessary). The fixed part of the AMD PDU
      // segment header itself is byte aligned and consists of a D/C, a RF, a P, a FI, an E, a SN, a LSF and a SO. The extension
      // part of the AMD PDU segment header itself is byte aligned and consists of E(s) and LI(s).
      //
      // An AMD PDU segment header consists of an extension part only when more than one Data field elements are present
      // in the AMD PDU segment, in which case an E and a LI are present for every Data field element except the last.
      // Furthermore, when an AMD PDU segment header consists of an odd number of LI(s), four padding bits follow after the
      // last LI.

      pdu_sub_segment_p->b1 = (pdu_original_p->b1 & 0x83) | 0x40;
      pdu_sub_segment_p->b2 = pdu_original_p->b2;
      pdu_sub_segment_p->data[0] = ((uint8_t)(start_offset >> 8));
      pdu_sub_segment_p->data[1] = ((uint8_t)(start_offset & 0xFF));

      *sizeP = *sizeP - 4;


      int            continue_fill_pdu_with_pdu  = 1;
      int            test_pdu_remaining_size     = *sizeP;
      int            test_num_li                 = 0;
      int            fill_num_li                    ;
      int            test_li_sum                 = 0;
      int            not_test_fi                 = 0; // by default not 1st byte and not last byte af a SDU
      int            test_start_offset;
      unsigned int   test_li_length_in_bytes     = 1;
      int16_t          test_li_list[RLC_AM_MAX_SDU_IN_PDU];
      uint8_t*          fill_payload_p;
      //int            test_fi_last_byte_pdu_is_last_byte_sdu = 0;
      //int            test_fi_first_byte_pdu_is_first_byte_sdu = 0;

      rlc_am_e_li_t* e_li_sub_segment            = (rlc_am_e_li_t*)(&pdu_sub_segment_p->data[2]);
      //int            first_enter_in_start_offset_lt_li_sum = 1;
      int            not_fi_original                 = ((pdu_original_p->b1 & 0x18) >> 3) ^ 3;

      //-------------------------------------------------------
      // set MAX payload size that can be copied
      // first constraint : the size of the hole to retransmit
      rlc_am_get_next_hole(ctxt_pP, rlc_pP, snP, &start_offset, &stop_offset);
      max_copy_payload_size = stop_offset - start_offset + 1;
      assert(max_copy_payload_size > 0);
      assert(test_pdu_remaining_size > 0);
418 419
      LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] HOLE FOUND SO %d -> %d\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
420 421
            start_offset,
            stop_offset);
422 423
      LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] ORIGINAL FI %d\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
424 425 426 427
            (pdu_original_p->b1 & 0x18) >> 3);

      // second constraint the size of the pdu_p requested by MAC layer
      if (max_copy_payload_size > test_pdu_remaining_size) {
428 429
        LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] CUT max_copy_payload_size with test_pdu_remaining_size %d -> %d\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
430 431 432 433
              max_copy_payload_size,
              test_pdu_remaining_size);
        max_copy_payload_size = test_pdu_remaining_size;
      }
434 435


436 437 438
      if (start_offset == 0) {
        not_test_fi = (not_fi_original & 0x02);
      }
439

440
      test_start_offset = start_offset;
441

442 443
      //.find the li corresponding to the nack_so_start (start_offset)
      if (pdu_info.num_li > 0) {
444 445
        LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] ORIGINAL NUM LI %d\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
446
              pdu_info.num_li);
447

448
        while ((li_index < pdu_info.num_li) && (continue_fill_pdu_with_pdu)) {
449 450
          LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] FIND LI %d\n",
                PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
451 452 453
                pdu_info.li_list[li_index]);

          if (max_copy_payload_size > test_pdu_remaining_size) {
454 455
            LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] CUT max_copy_payload_size with test_pdu_remaining_size %d -> %d\n",
                  PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
456 457 458 459 460 461 462 463 464 465 466 467 468
                  max_copy_payload_size,
                  test_pdu_remaining_size);
            max_copy_payload_size = test_pdu_remaining_size;
          }

          assert(max_copy_payload_size >= 0);
          assert(test_pdu_remaining_size >= 0);

          test_li_sum               += pdu_info.li_list[li_index];

          //---------------------------------------------------------------
          if (test_start_offset < test_li_sum) {

469 470
            LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] test_start_offset < test_li_sum  %d < %d\n",
                  PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
471 472 473
                  test_start_offset,
                  test_li_sum);
            /*if (test_max_copy_payload_size > (test_li_sum - test_start_offset)) {
474
                #if TRACE_RLC_AM_RESEGMENT
475 476 477 478
                LOG_D(RLC, "[FRAME %5u][%s][RLC_AM][MOD %u/%u][RB %u][RE-SEGMENT] CUT test_max_copy_payload_size with test_li_sum - test_start_offset %d -> %d\n",ctxt_pP->frame, rlc_pP->module_id, rlc_pP->rb_id,  test_max_copy_payload_size, test_li_sum - test_start_offset);
                #endif
                test_max_copy_payload_size = test_li_sum - test_start_offset;
            }*/
479

480
            if ((max_copy_payload_size + test_start_offset) < test_li_sum) {
481 482
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] (max_copy_payload_size %d + test_start_offset %d) < test_li_sum %d\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
483 484 485
                    max_copy_payload_size,
                    test_start_offset,
                    test_li_sum);
486 487
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] COPY SO %d -> %d  %d BYTES\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
488 489 490 491 492 493 494 495 496 497 498
                    test_start_offset ,
                    test_start_offset + max_copy_payload_size - 1,
                    max_copy_payload_size );
              assert(max_copy_payload_size > 0);
              continue_fill_pdu_with_pdu = 0;
              test_pdu_copy_size         = test_pdu_copy_size + max_copy_payload_size;
              test_start_offset          = test_start_offset + max_copy_payload_size;
              not_test_fi                = not_test_fi & 0x02;  // clear b0, last byte does not correspond to last byte of a SDU
              max_copy_payload_size      = 0;

            } else if ((max_copy_payload_size + test_start_offset) == test_li_sum) {
499 500
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] (max_copy_payload_size + test_start_offset) == test_li_sum %d == %d\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
501 502
                    (max_copy_payload_size + test_start_offset) ,
                    test_li_sum);
503 504
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] COPY SO %d -> %d  %d BYTES\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
505 506 507 508 509 510 511 512 513 514 515
                    test_start_offset ,
                    test_start_offset + max_copy_payload_size - 1,
                    max_copy_payload_size );
              assert(max_copy_payload_size > 0);
              continue_fill_pdu_with_pdu = 0;
              test_pdu_copy_size         = test_pdu_copy_size + max_copy_payload_size;
              test_start_offset          = test_start_offset + max_copy_payload_size;
              not_test_fi                = not_test_fi | 0x01;// set b0, last byte does correspond to last byte of a SDU
              max_copy_payload_size      = 0;

            } else if ((max_copy_payload_size + test_start_offset - (test_li_length_in_bytes ^ 3)) > test_li_sum) {
516 517 518
              LOG_T(RLC,
                    PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] (max_copy_payload_size + test_start_offset - (test_li_length_in_bytes ^ 3)) > test_li_sum %d > %d\n SET LI %d\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
519 520 521
                    (max_copy_payload_size + test_start_offset)  + (test_li_length_in_bytes ^ 3),
                    test_li_sum,
                    test_li_sum - test_start_offset);
522 523
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] COPY SO %d -> %d  %d BYTES\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
524 525 526 527 528 529 530 531 532 533 534 535
                    test_start_offset ,
                    test_li_sum - 1,
                    test_li_sum - test_start_offset );
              assert((test_li_sum - test_start_offset) > 0);
              test_li_list[test_num_li++] = test_li_sum - test_start_offset;
              test_pdu_copy_size          = test_pdu_copy_size + test_li_sum - test_start_offset;
              test_li_length_in_bytes      = test_li_length_in_bytes ^ 3;

              test_pdu_remaining_size     = test_pdu_remaining_size - test_li_sum + test_start_offset -
                                            test_li_length_in_bytes;

              max_copy_payload_size       = max_copy_payload_size - test_li_sum + test_start_offset - test_li_length_in_bytes;
536 537
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] NOW max_copy_payload_size %d BYTES test_start_offset %d\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
538 539 540 541 542 543
                    max_copy_payload_size,
                    test_li_sum);
              // normally the next while itereation will add bytes to PDU
              //not_test_fi = not_test_fi | 0x01;  // set b0, last byte does correspond to last byte of a SDU
              test_start_offset           = test_li_sum;

544
            } else {
545 546
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] (test_max_copy_payload_size + test_start_offset ) > test_li_sum %d > %d\n NO REMAINING SIZE FOR LI",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
547 548
                    (max_copy_payload_size + test_start_offset),
                    test_li_sum);
549 550
              LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] COPY SO %d -> %d  %d BYTES\n",
                    PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
551 552 553 554 555 556 557 558 559 560 561 562
                    test_start_offset ,
                    test_li_sum - 1,
                    test_li_sum - test_start_offset );
              assert((test_li_sum - test_start_offset) > 0);
              continue_fill_pdu_with_pdu = 0;
              test_pdu_copy_size         = test_pdu_copy_size + test_li_sum - test_start_offset;

              test_pdu_remaining_size    = test_pdu_remaining_size - test_li_sum + test_start_offset;

              max_copy_payload_size      = max_copy_payload_size - test_li_sum + test_start_offset;
              test_start_offset          = test_li_sum;
              not_test_fi                = not_test_fi | 0x01;  // set b0, last byte does correspond to last byte of a SDU
563
            }
564

565
            //---------------------------------------------------------------
566 567 568
            // start offset start at the begining of a SDU
            // and it cant be the first data field of the original PDU
          } else if (test_start_offset == test_li_sum) {
569 570
            LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] (test_start_offset == test_li_sum) %d == %d\n",
                  PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
571 572 573 574 575
                  test_start_offset ,
                  test_li_sum);

            if ((test_num_li == 0) && (test_pdu_copy_size == 0)) {
              not_test_fi = not_test_fi | 0x02;  // set b1, first byte does correspond to first byte of a SDU
576
            }
577
          }
578

579 580 581 582 583 584 585 586 587 588
          li_index = li_index + 1;
        }

        if ((continue_fill_pdu_with_pdu > 0) &&
            (li_index    == pdu_info.num_li) &&
            (pdu_info.hidden_size       > 0) &&
            (test_pdu_remaining_size    > 0) &&
            (max_copy_payload_size      > 0) ) {

          if (max_copy_payload_size > test_pdu_remaining_size) {
589 590
            LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] TRYING HIDDEN SIZE...CUT max_copy_payload_size with test_pdu_remaining_size %d -> %d\n",
                  PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
591 592 593 594 595 596 597 598 599
                  max_copy_payload_size,
                  test_pdu_remaining_size);
            max_copy_payload_size = test_pdu_remaining_size;
          }

          // remaining bytes to fill, redundant check, but ...
          if  ((max_copy_payload_size + test_start_offset) >= (pdu_info.hidden_size + test_li_sum)) {
            test_pdu_copy_size += (pdu_info.hidden_size  + test_li_sum - test_start_offset);
            LOG_T(RLC,
600 601
                  PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] COPYING WHOLE REMAINING SIZE %d (max_copy_payload_size %d, test_start_offset %d, pdu_info.hidden_size %d test_li_sum %d test_pdu_copy_size %d)\n",
                  PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
602 603 604 605 606 607 608 609 610
                  pdu_info.hidden_size  + test_li_sum - test_start_offset,
                  max_copy_payload_size,
                  test_start_offset,
                  pdu_info.hidden_size,
                  test_li_sum,
                  test_pdu_copy_size);
            test_start_offset   = pdu_info.hidden_size   + test_li_sum;
            not_test_fi = (not_test_fi & 0x2) | (not_fi_original & 0x1);  // set b0 idendical to the b0 of the non segmented PDU
          } else {
611 612
            LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] COPYING REMAINING SIZE %d (/%d)\n",
                  PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
613 614 615 616 617 618
                  max_copy_payload_size,
                  pdu_info.hidden_size);
            test_pdu_copy_size += max_copy_payload_size;
            test_start_offset = test_start_offset + max_copy_payload_size;
            not_test_fi = not_test_fi & 0x2;  // clear b0 because no SDU ending in this PDU
          }
619
        }
620
      } else { // num_li == 0
621 622
        LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] (num_li == 0)\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP));
623
        test_pdu_copy_size = max_copy_payload_size;
624

625
        if ((stop_offset ==  (start_offset + max_copy_payload_size - 1)) && (stop_offset == rlc_pP->tx_data_pdu_buffer[snP].payload_size - 1)) {
626 627 628 629 630 631 632
          not_test_fi = (not_test_fi & 0x2) | (not_fi_original & 0x1);  // set b0 idendical to the b0 of the non segmented PDU
        } else {
          not_test_fi = not_test_fi & 0x2;  // clear b0 because no SDU ending in this PDU
        }
      }

      //---------------------------------------------------------------
633
      /*if (stop_offset == (rlc_pP->tx_data_pdu_buffer[snP].payload_size - 1)) {
634 635 636 637 638 639 640 641 642
              test_fi = (test_fi & 0x02) | (fi_original & 0x01);
      }*/
      //---------------------------------------------------------------
      // write FI field in header
      //---------------------------------------------------------------
      pdu_sub_segment_p->b1 = pdu_sub_segment_p->b1 | (((not_test_fi << 3) ^ 0x18) & 0x18);
      //---------------------------------------------------------------
      // fill the segment pdu_p with Lis and data
      //---------------------------------------------------------------
643
      LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] fill the segment pdu_p with Lis and data, test_num_li %d\n",
Cedric Roux's avatar
Cedric Roux committed
644
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP), test_num_li);
645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675

      if (test_num_li > 0) {
        pdu_sub_segment_p->b1 = pdu_sub_segment_p->b1 | 0x04; // set E bit
        test_li_length_in_bytes = 1;

        for (fill_num_li=0; fill_num_li < test_num_li; fill_num_li++) {
          test_li_length_in_bytes = test_li_length_in_bytes ^ 3;

          if (test_li_length_in_bytes  == 2) {
            if (fill_num_li == (test_num_li - 1)) {
              e_li_sub_segment->b1 = 0;
            } else {
              e_li_sub_segment->b1 =  0x80;
            }

            e_li_sub_segment->b1 = e_li_sub_segment->b1 | (test_li_list[fill_num_li] >> 4);
            e_li_sub_segment->b2 = test_li_list[fill_num_li] << 4;
            fill_payload_p         = (uint8_t*)(&e_li_sub_segment->b3);
            *sizeP               = *sizeP - 2;
          } else {
            if (fill_num_li != (test_num_li - 1)) {
              e_li_sub_segment->b2  = e_li_sub_segment->b2 | 0x08;
            }

            e_li_sub_segment->b2 = e_li_sub_segment->b2 | (test_li_list[fill_num_li] >> 8);
            e_li_sub_segment->b3 = test_li_list[fill_num_li] & 0xFF;
            e_li_sub_segment++;
            fill_payload_p         = (uint8_t*)e_li_sub_segment;
            *sizeP               = *sizeP - 1;
          }

Cedric Roux's avatar
Cedric Roux committed
676
          LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] ADD LI %d\n",
677
                PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
678 679 680
                test_li_list[fill_num_li]);
        }
      } else {
Cedric Roux's avatar
Cedric Roux committed
681
        LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] ADD NO LI\n",
682
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP));
683 684
        fill_payload_p = (uint8_t*)e_li_sub_segment;
      }
685

686 687 688 689
      //---------------------------------------------------------------
      // copy payload to retransmit
      //---------------------------------------------------------------
      memcpy(fill_payload_p,
690
             &rlc_pP->tx_data_pdu_buffer[snP].payload[start_offset],
691 692 693 694 695
             test_pdu_copy_size);

      ((struct mac_tb_req*)(mb_sub_segment_p->data))->tb_size  = (tb_size_t)(((uint64_t)fill_payload_p)+ test_pdu_copy_size) - ((uint64_t)(&pdu_sub_segment_p->b1));

      // set LSF
696
      if ((test_pdu_copy_size + start_offset) == rlc_pP->tx_data_pdu_buffer[snP].payload_size) {
697 698
        pdu_sub_segment_p->data[0] = pdu_sub_segment_p->data[0] | 0x80;

699
        rlc_pP->tx_data_pdu_buffer[snP].flags.retransmit = 0;
700

701 702
        LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] RE-SEND DATA PDU SN %04d SO %d %d BYTES PAYLOAD %d BYTES LSF!\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
703 704 705 706 707
              snP,
              start_offset,
              ((struct mac_tb_req*)(mb_sub_segment_p->data))->tb_size,
              test_pdu_copy_size);
      } else {
708 709
        LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] RE-SEND DATA PDU SN %04d SO %d %d BYTES PAYLOAD %d BYTES\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
710 711 712 713 714 715
              snP,
              start_offset,
              ((struct mac_tb_req*)(mb_sub_segment_p->data))->tb_size,
              test_pdu_copy_size);
      }

716 717
      LOG_T(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] *sizeP %d = *sizeP %d - test_pdu_copy_size %d\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
718 719 720 721 722 723 724 725
            *sizeP - test_pdu_copy_size, *sizeP,
            test_pdu_copy_size);

      *sizeP = *sizeP - test_pdu_copy_size;
      //---------------------------------------------------------------
      // update nack_so_start
      //---------------------------------------------------------------
      rlc_am_remove_hole(ctxt_pP, rlc_pP, snP, start_offset, test_pdu_copy_size+start_offset - 1);
726
      //rlc_pP->tx_data_pdu_buffer[snP].nack_so_start = rlc_pP->tx_data_pdu_buffer[snP].nack_so_start + test_pdu_copy_size;
727 728
      LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] RE-SEND DATA PDU SN %04d NOW nack_so_start %d nack_so_stop %d\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
729
            snP,
730 731 732 733 734
            rlc_pP->tx_data_pdu_buffer[snP].nack_so_start,
            rlc_pP->tx_data_pdu_buffer[snP].nack_so_stop);
      /*if (rlc_pP->tx_data_pdu_buffer[snP].nack_so_start == rlc_pP->tx_data_pdu_buffer[snP].nack_so_stop) {
          rlc_pP->tx_data_pdu_buffer[snP].nack_so_start = 0;
          rlc_pP->tx_data_pdu_buffer[snP].nack_so_stop  = 0x7FFF;
735 736
      }*/
    } else {
737 738 739
      LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] COULD NOT GET INFO FOR DATA PDU SN %04d -> RETURN NULL\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
            snP);
740
      return NULL;
741 742
    }

fnabet's avatar
fnabet committed
743
    rlc_am_pdu_polling(ctxt_pP, rlc_pP, pdu_sub_segment_p, test_pdu_copy_size,false);
744 745
    return mb_sub_segment_p;
  } else {
746 747
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[RE-SEGMENT] RE-SEND DATA PDU SN %04d BUT NO PDU AVAILABLE -> RETURN NULL\n",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
748 749 750 751
          snP);
    assert(3==4);
    return NULL;
  }
752 753
}
//-----------------------------------------------------------------------------
754 755 756 757
void rlc_am_tx_buffer_display (
  const protocol_ctxt_t* const  ctxt_pP,
  rlc_am_entity_t* const rlc_pP,
  char* const message_pP)
758
{
759 760 761 762
  rlc_sn_t       sn = rlc_pP->vt_a;
  int            i, loop = 0;

  if (message_pP) {
763 764
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT" Retransmission buffer %s VT(A)=%04d VT(S)=%04d:",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
765 766 767 768
          message_pP,
          rlc_pP->vt_a,
          rlc_pP->vt_s);
  } else {
769 770
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT" Retransmission buffer VT(A)=%04d VT(S)=%04d:",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
771 772 773 774 775
          rlc_pP->vt_a,
          rlc_pP->vt_s);
  }

  while (rlc_pP->vt_s != sn) {
776
    if (rlc_pP->tx_data_pdu_buffer[sn].mem_block) {
777 778 779 780
      if ((loop % 1) == 0) {
        LOG_D(RLC, "\nTX SN:\t");
      }

781 782 783
      if (rlc_pP->tx_data_pdu_buffer[sn].flags.retransmit) {
        LOG_D(RLC, "%04d %d/%d Bytes (NACK RTX:%02d ",sn, rlc_pP->tx_data_pdu_buffer[sn].header_and_payload_size, rlc_pP->tx_data_pdu_buffer[sn].payload_size,
              rlc_pP->tx_data_pdu_buffer[sn].retx_count);
784
      } else {
785 786
        LOG_D(RLC, "%04d %d/%d Bytes (RTX:%02d ",sn, rlc_pP->tx_data_pdu_buffer[sn].header_and_payload_size, rlc_pP->tx_data_pdu_buffer[sn].payload_size,
              rlc_pP->tx_data_pdu_buffer[sn].retx_count);
787 788
      }

789 790
      if (rlc_pP->tx_data_pdu_buffer[sn].num_holes == 0) {
        LOG_D(RLC, "SO:%04d->%04d)\t", rlc_pP->tx_data_pdu_buffer[sn].nack_so_start, rlc_pP->tx_data_pdu_buffer[sn].nack_so_stop);
791
      } else {
792
        for (i=0; i<rlc_pP->tx_data_pdu_buffer[sn].num_holes; i++) {
793
          assert(i < RLC_AM_MAX_HOLES_REPORT_PER_PDU);
794
          LOG_D(RLC, "SO:%04d->%04d)\t", rlc_pP->tx_data_pdu_buffer[sn].hole_so_start[i], rlc_pP->tx_data_pdu_buffer[sn].hole_so_stop[i]);
795
        }
796 797 798
      }

      loop++;
799
    }
800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817

    sn = (sn + 1) & RLC_AM_SN_MASK;
  }

  LOG_D(RLC, "\n");
}
//-----------------------------------------------------------------------------
void rlc_am_retransmit_any_pdu(
  const protocol_ctxt_t* const  ctxt_pP,
  rlc_am_entity_t* const rlc_pP)
{
  rlc_sn_t             sn           = (rlc_pP->vt_s - 1) & RLC_AM_SN_MASK;
  rlc_sn_t             sn_end       = (rlc_pP->vt_a - 1) & RLC_AM_SN_MASK;
  int                  found_pdu    = 0;
  rlc_sn_t             found_pdu_sn = 0; // avoid warning
  mem_block_t*         pdu_p        = NULL;
  rlc_am_pdu_sn_10_t*  pdu_sn_10_p  = NULL;

818 819
  LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[FORCE-TRAFFIC] rlc_am_retransmit_any_pdu()\n",
        PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP));
820 821

  while (sn != sn_end) {
822
    if (rlc_pP->tx_data_pdu_buffer[sn].mem_block != NULL) {
823 824 825 826 827
      if (!found_pdu) {
        found_pdu = 1;
        found_pdu_sn = sn;
      }

828
      if (rlc_pP->tx_data_pdu_buffer[sn].header_and_payload_size <= rlc_pP->nb_bytes_requested_by_mac) {
829 830 831
        LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[FORCE-TRAFFIC] RE-SEND DATA PDU SN %04d\n",
              PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
              sn);
832
#if MESSAGE_CHART_GENERATOR_RLC_MAC
833 834 835 836
        MSC_LOG_EVENT((ctxt_pP->enb_flag == ENB_FLAG_YES) ? MSC_RLC_ENB:MSC_RLC_UE,\
                               "0 "PROTOCOL_RLC_AM_MSC_FMT" RTX any pdu found SN %u",\
                               PROTOCOL_RLC_AM_MSC_ARGS(ctxt_pP,rlc_pP), sn);
#endif
837 838 839 840
        rlc_am_nack_pdu (ctxt_pP, rlc_pP, sn, 0, 0x7FFF);
        // no need for update rlc_pP->nb_bytes_requested_by_mac
        pdu_p = rlc_am_retransmit_get_copy(ctxt_pP, rlc_pP, sn);
        pdu_sn_10_p = (rlc_am_pdu_sn_10_t*) (&pdu_p->data[sizeof(struct mac_tb_req)]);
841
        rlc_am_pdu_polling(ctxt_pP, rlc_pP, pdu_sn_10_p, rlc_pP->tx_data_pdu_buffer[sn].header_and_payload_size,false);
fnabet's avatar
fnabet committed
842 843 844 845 846
        //BugFix: polling is checked and done in function above !
        //pdu_sn_10_p->b1 = pdu_sn_10_p->b1 | 0x20;
        //BugFix : pdu_without_poll and byte_without_poll are reset only if a Poll is transmitted
        //rlc_pP->c_pdu_without_poll     = 0;
        //rlc_pP->c_byte_without_poll    = 0;
847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863
        //rlc_pP->poll_sn = (rlc_pP->vt_s -1) & RLC_AM_SN_MASK;
        rlc_am_start_timer_poll_retransmit(ctxt_pP, rlc_pP);
        rlc_pP->stat_tx_data_pdu                   += 1;
        rlc_pP->stat_tx_retransmit_pdu             += 1;
        rlc_pP->stat_tx_data_bytes                 += ((struct mac_tb_req*)(pdu_p->data))->tb_size;
        rlc_pP->stat_tx_retransmit_bytes           += ((struct mac_tb_req*)(pdu_p->data))->tb_size;
        list_add_tail_eurecom (pdu_p, &rlc_pP->pdus_to_mac_layer);
        return;
      }
    }

    sn = (sn - 1) & RLC_AM_SN_MASK;
  }

  // no pdu_p with correct size has been found
  // so re-segment a pdu_p if possible
  if (found_pdu) {
864 865
    LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[FORCE-TRAFFIC] SEND SEGMENT OF DATA PDU SN %04d\n",
          PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
866 867 868
          found_pdu_sn);

    if (rlc_pP->nb_bytes_requested_by_mac > 4) {
869
#if MESSAGE_CHART_GENERATOR_RLC_MAC
870 871 872 873
        MSC_LOG_EVENT((ctxt_pP->enb_flag == ENB_FLAG_YES) ? MSC_RLC_ENB:MSC_RLC_UE,\
                               "0 "PROTOCOL_RLC_AM_MSC_FMT" RTX any pdu found SN %u (subseg)",\
                               PROTOCOL_RLC_AM_MSC_ARGS(ctxt_pP,rlc_pP), found_pdu_sn);
#endif
874 875 876
      rlc_am_nack_pdu (ctxt_pP, rlc_pP, found_pdu_sn, 0, 0x7FFF);
      pdu_p = rlc_am_retransmit_get_subsegment(ctxt_pP, rlc_pP, found_pdu_sn, &rlc_pP->nb_bytes_requested_by_mac);
      pdu_sn_10_p = (rlc_am_pdu_sn_10_t*) (&pdu_p->data[sizeof(struct mac_tb_req)]);
877
      rlc_am_pdu_polling(ctxt_pP, rlc_pP, pdu_sn_10_p, rlc_pP->tx_data_pdu_buffer[found_pdu_sn].header_and_payload_size,false);
878 879 880 881 882 883 884 885 886 887 888 889
      pdu_sn_10_p->b1 = pdu_sn_10_p->b1 | 0x20;
      rlc_pP->c_pdu_without_poll     = 0;
      rlc_pP->c_byte_without_poll    = 0;
      //rlc_pP->poll_sn = (rlc_pP->vt_s -1) & RLC_AM_SN_MASK;
      rlc_am_start_timer_poll_retransmit(ctxt_pP, rlc_pP);
      rlc_pP->stat_tx_data_pdu                   += 1;
      rlc_pP->stat_tx_retransmit_pdu             += 1;
      rlc_pP->stat_tx_data_bytes                 += ((struct mac_tb_req*)(pdu_p->data))->tb_size;
      rlc_pP->stat_tx_retransmit_bytes           += ((struct mac_tb_req*)(pdu_p->data))->tb_size;
      list_add_tail_eurecom (pdu_p, &rlc_pP->pdus_to_mac_layer);
      return;
    } else {
890 891
      LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[FORCE-TRAFFIC] ... BUT NOT ENOUGH BYTES ALLOWED BY MAC %0d\n",
            PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),
892
            rlc_pP->nb_bytes_requested_by_mac);
893
    }
894
  }
895
}