srsRAN_4G/lib/test/upper/rlc_am_control_test.cc

/*
 * Copyright 2013-2019 Software Radio Systems Limited
 *
 * This file is part of srsLTE.
 *
 * srsLTE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * srsLTE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * A copy of the GNU Affero General Public License can be found in
 * the LICENSE file in the top-level directory of this distribution
 * and at http://www.gnu.org/licenses/.
 *
 */

#include <assert.h>
#include <iostream>
#include "srslte/upper/rlc_am.h"

// Simple status PDU
uint8_t pdu1[] = {0x00, 0x78};
uint32_t PDU1_LEN = 2;

// Status PDU with 4 NACKs
uint8_t pdu2[] = {0x00 ,0x22 ,0x00 ,0x40 ,0x0C ,0x01 ,0xC0 ,0x20};
uint32_t PDU2_LEN = 8;

int main(int argc, char **argv) {
  srslte::rlc_status_pdu_t s;
  srslte::byte_buffer_t b1,b2;

  memcpy(b1.msg, &pdu1[0], PDU1_LEN);
  b1.N_bytes = PDU1_LEN;
  rlc_am_read_status_pdu(&b1, &s);
  assert(s.ack_sn == 30);
  assert(s.N_nack == 0);
  rlc_am_write_status_pdu(&s, &b2);
  assert(b2.N_bytes == PDU1_LEN);
  for(uint32_t i=0;i<b2.N_bytes;i++)
    assert(b2.msg[i] == b1.msg[i]);

  b1.reset();
  b2.reset();
  memset(&s, 0, sizeof(srslte::rlc_status_pdu_t));

  memcpy(b1.msg, &pdu2[0], PDU2_LEN);
  b1.N_bytes = PDU2_LEN;
  rlc_am_read_status_pdu(&b1, &s);
  assert(s.ack_sn == 8);
  assert(s.N_nack == 4);
  assert(s.nacks[0].nack_sn == 0);
  assert(s.nacks[1].nack_sn == 1);
  assert(s.nacks[2].nack_sn == 3);
  assert(s.nacks[3].nack_sn == 4);
  rlc_am_write_status_pdu(&s, &b2);
  assert(b2.N_bytes == PDU2_LEN);
  for(uint32_t i=0;i<b2.N_bytes;i++)
    assert(b2.msg[i] == b1.msg[i]);
}