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311 lines
11 KiB
C++
311 lines
11 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#include "rlc_test_common.h"
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#include "srsran/common/buffer_pool.h"
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#include "srsran/common/rlc_pcap.h"
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#include "srsran/common/test_common.h"
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#include "srsran/common/threads.h"
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#include "srsran/interfaces/ue_pdcp_interfaces.h"
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#include "srsran/interfaces/ue_rrc_interfaces.h"
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#include "srsran/rlc/rlc_am_nr.h"
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#define NBUFS 5
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#define HAVE_PCAP 0
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#define SDU_SIZE 500
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using namespace srsue;
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using namespace srsran;
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int basic_test_tx(rlc_am* rlc, byte_buffer_t pdu_bufs[NBUFS])
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{
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// Push 5 SDUs into RLC1
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unique_byte_buffer_t sdu_bufs[NBUFS];
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for (int i = 0; i < NBUFS; i++) {
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sdu_bufs[i] = srsran::make_byte_buffer();
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sdu_bufs[i]->msg[0] = i; // Write the index into the buffer
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sdu_bufs[i]->N_bytes = 1; // Give each buffer a size of 1 byte
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sdu_bufs[i]->md.pdcp_sn = i; // PDCP SN for notifications
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rlc->write_sdu(std::move(sdu_bufs[i]));
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}
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TESTASSERT(15 == rlc->get_buffer_state()); // 2 Bytes * NBUFFS (header size) + NBUFFS (data) = 15
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// Read 5 PDUs from RLC1 (1 byte each)
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for (int i = 0; i < NBUFS; i++) {
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uint32_t len = rlc->read_pdu(pdu_bufs[i].msg, 3); // 2 bytes for header + 1 byte payload
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pdu_bufs[i].N_bytes = len;
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TESTASSERT(3 == len);
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}
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TESTASSERT(0 == rlc->get_buffer_state());
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return SRSRAN_SUCCESS;
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}
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/*
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* Test the transmission and acknowledgement of 5 SDUs.
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*
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* Each SDU is transmitted as a single PDU.
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* There are no lost PDUs, and the byte size is small, so the Poll_PDU configuration
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* will trigger the status report.
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* Poll PDU is configured to 4, so the 5th PDU should set the polling bit.
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*/
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int basic_test()
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{
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rlc_am_tester tester;
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timer_handler timers(8);
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byte_buffer_t pdu_bufs[NBUFS];
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auto& test_logger = srslog::fetch_basic_logger("TESTER ");
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test_logger.info("====================");
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test_logger.info("==== Basic Test ====");
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test_logger.info("====================");
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rlc_am rlc1(srsran_rat_t::nr, srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers);
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rlc_am rlc2(srsran_rat_t::nr, srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers);
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rlc_am_nr_tx* tx1 = dynamic_cast<rlc_am_nr_tx*>(rlc1.get_tx());
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rlc_am_nr_rx* rx1 = dynamic_cast<rlc_am_nr_rx*>(rlc1.get_rx());
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rlc_am_nr_tx* tx2 = dynamic_cast<rlc_am_nr_tx*>(rlc2.get_tx());
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rlc_am_nr_rx* rx2 = dynamic_cast<rlc_am_nr_rx*>(rlc2.get_rx());
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// before configuring entity
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TESTASSERT(0 == rlc1.get_buffer_state());
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if (not rlc1.configure(rlc_config_t::default_rlc_am_nr_config())) {
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return -1;
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}
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if (not rlc2.configure(rlc_config_t::default_rlc_am_nr_config())) {
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return -1;
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}
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basic_test_tx(&rlc1, pdu_bufs);
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// Write 5 PDUs into RLC2
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for (int i = 0; i < NBUFS; i++) {
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rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes);
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}
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TESTASSERT(3 == rlc2.get_buffer_state());
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// Read status PDU from RLC2
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byte_buffer_t status_buf;
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int len = rlc2.read_pdu(status_buf.msg, 3);
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status_buf.N_bytes = len;
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TESTASSERT(0 == rlc2.get_buffer_state());
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// Assert status is correct
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rlc_am_nr_status_pdu_t status_check = {};
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rlc_am_nr_read_status_pdu(&status_buf, rlc_am_nr_sn_size_t::size12bits, &status_check);
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TESTASSERT(status_check.ack_sn == 5); // 5 is the last SN that was not received.
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// Write status PDU to RLC1
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rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
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// Check TX_NEXT_ACK
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rlc_am_nr_tx_state_t st = tx1->get_tx_state();
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TESTASSERT_EQ(5, st.tx_next_ack);
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TESTASSERT_EQ(0, tx1->get_tx_window_size());
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// Check statistics
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rlc_bearer_metrics_t metrics1 = rlc1.get_metrics();
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rlc_bearer_metrics_t metrics2 = rlc2.get_metrics();
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// RLC1 PDU metrics
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TESTASSERT_EQ(5, metrics1.num_tx_sdus);
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TESTASSERT_EQ(0, metrics1.num_rx_sdus);
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TESTASSERT_EQ(5, metrics1.num_tx_sdu_bytes);
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TESTASSERT_EQ(0, metrics1.num_rx_sdu_bytes);
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TESTASSERT_EQ(0, metrics1.num_lost_sdus);
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// RLC1 SDU metrics
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TESTASSERT_EQ(5, metrics1.num_tx_pdus);
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TESTASSERT_EQ(1, metrics1.num_rx_pdus); // One status PDU
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TESTASSERT_EQ(15, metrics1.num_tx_pdu_bytes); // 2 Bytes * NBUFFS (header size) + NBUFFS (data) = 15
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TESTASSERT_EQ(3, metrics1.num_rx_pdu_bytes); // One status PDU
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TESTASSERT_EQ(0, metrics1.num_lost_sdus); // No lost SDUs
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// RLC2 PDU metrics
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TESTASSERT_EQ(0, metrics2.num_tx_sdus);
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TESTASSERT_EQ(5, metrics2.num_rx_sdus);
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TESTASSERT_EQ(0, metrics2.num_tx_sdu_bytes);
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TESTASSERT_EQ(5, metrics2.num_rx_sdu_bytes);
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TESTASSERT_EQ(0, metrics2.num_lost_sdus);
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// RLC2 SDU metrics
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TESTASSERT_EQ(1, metrics2.num_tx_pdus); // One status PDU
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TESTASSERT_EQ(5, metrics2.num_rx_pdus); // 5 SDUs
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TESTASSERT_EQ(3, metrics2.num_tx_pdu_bytes); // One status PDU
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TESTASSERT_EQ(15, metrics2.num_rx_pdu_bytes); // 2 Bytes * NBUFFS (header size) + NBUFFS (data) = 15
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TESTASSERT_EQ(0, metrics2.num_lost_sdus); // No lost SDUs
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return SRSRAN_SUCCESS;
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}
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/*
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* Test the loss of a single PDU.
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* NACK should be visible in the status report.
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* Retx after NACK should be present too.
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*/
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int lost_pdu_test()
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{
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rlc_am_tester tester;
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timer_handler timers(8);
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byte_buffer_t pdu_bufs[NBUFS];
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auto& test_logger = srslog::fetch_basic_logger("TESTER ");
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test_logger.info("=======================");
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test_logger.info("==== Lost PDU Test ====");
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test_logger.info("=======================");
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rlc_am rlc1(srsran_rat_t::nr, srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers);
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rlc_am rlc2(srsran_rat_t::nr, srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers);
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// before configuring entity
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TESTASSERT(0 == rlc1.get_buffer_state());
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if (not rlc1.configure(rlc_config_t::default_rlc_am_nr_config())) {
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return -1;
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}
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if (not rlc2.configure(rlc_config_t::default_rlc_am_nr_config())) {
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return -1;
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}
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basic_test_tx(&rlc1, pdu_bufs);
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// Write 5 PDUs into RLC2
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for (int i = 0; i < NBUFS; i++) {
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if (i != 3) {
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rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); // Don't write RLC_SN=3.
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}
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}
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// Only after t-reassembly has expired, will the status report include NACKs.
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TESTASSERT(3 == rlc2.get_buffer_state());
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{
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// Read status PDU from RLC2
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byte_buffer_t status_buf;
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int len = rlc2.read_pdu(status_buf.msg, 5);
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status_buf.N_bytes = len;
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TESTASSERT(0 == rlc2.get_buffer_state());
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// Assert status is correct
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rlc_am_nr_status_pdu_t status_check = {};
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rlc_am_nr_read_status_pdu(&status_buf, rlc_am_nr_sn_size_t::size12bits, &status_check);
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TESTASSERT(status_check.ack_sn == 3); // 3 is the next expected SN (i.e. the lost packet.)
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// Write status PDU to RLC1
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rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
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}
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// Step timers until reassambly timeout expires
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for (int cnt = 0; cnt < 35; cnt++) {
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timers.step_all();
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}
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// t-reassembly has expired. There should be a NACK in the status report.
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TESTASSERT(5 == rlc2.get_buffer_state());
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{
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// Read status PDU from RLC2
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byte_buffer_t status_buf;
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int len = rlc2.read_pdu(status_buf.msg, 5);
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status_buf.N_bytes = len;
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TESTASSERT(0 == rlc2.get_buffer_state());
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// Assert status is correct
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rlc_am_nr_status_pdu_t status_check = {};
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rlc_am_nr_read_status_pdu(&status_buf, rlc_am_nr_sn_size_t::size12bits, &status_check);
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TESTASSERT(status_check.ack_sn == 5); // 5 is the next expected SN.
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TESTASSERT(status_check.N_nack == 1); // We lost one PDU.
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TESTASSERT(status_check.nacks[0].nack_sn == 3); // Lost PDU SN=3.
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// Write status PDU to RLC1
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rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
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// Check there is an Retx of SN=3
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TESTASSERT(3 == rlc1.get_buffer_state());
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}
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{
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// Check correct re-transmission
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byte_buffer_t retx_buf;
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int len = rlc1.read_pdu(retx_buf.msg, 3);
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retx_buf.N_bytes = len;
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TESTASSERT(3 == len);
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rlc2.write_pdu(retx_buf.msg, retx_buf.N_bytes);
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TESTASSERT(0 == rlc2.get_buffer_state());
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}
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// Check statistics
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rlc_bearer_metrics_t metrics1 = rlc1.get_metrics();
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rlc_bearer_metrics_t metrics2 = rlc2.get_metrics();
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// SDU metrics
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TESTASSERT_EQ(5, metrics1.num_tx_sdus);
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TESTASSERT_EQ(0, metrics1.num_rx_sdus);
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TESTASSERT_EQ(5, metrics1.num_tx_sdu_bytes);
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TESTASSERT_EQ(0, metrics1.num_rx_sdu_bytes);
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TESTASSERT_EQ(0, metrics1.num_lost_sdus);
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// PDU metrics
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TESTASSERT_EQ(5 + 1, metrics1.num_tx_pdus); // One re-transmission
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TESTASSERT_EQ(2, metrics1.num_rx_pdus); // One status PDU
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TESTASSERT_EQ(18, metrics1.num_tx_pdu_bytes); // 2 Bytes * NBUFFS (header size) + NBUFFS (data) + 1 rext (3) = 18
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TESTASSERT_EQ(3 + 5, metrics1.num_rx_pdu_bytes); // Two status PDU (one with a NACK)
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TESTASSERT_EQ(0, metrics1.num_lost_sdus); // No lost SDUs
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// PDU metrics
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TESTASSERT_EQ(0, metrics2.num_tx_sdus);
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TESTASSERT_EQ(5, metrics2.num_rx_sdus);
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TESTASSERT_EQ(0, metrics2.num_tx_sdu_bytes);
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TESTASSERT_EQ(5, metrics2.num_rx_sdu_bytes);
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TESTASSERT_EQ(0, metrics2.num_lost_sdus);
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// SDU metrics
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TESTASSERT_EQ(2, metrics2.num_tx_pdus); // Two status PDUs
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TESTASSERT_EQ(5, metrics2.num_rx_pdus); // 5 PDUs (6 tx'ed, but one was lost)
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TESTASSERT_EQ(5 + 3, metrics2.num_tx_pdu_bytes); // Two status PDU (one with a NACK)
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TESTASSERT_EQ(15, metrics2.num_rx_pdu_bytes); // 2 Bytes * NBUFFS (header size) + NBUFFS (data) = 15
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TESTASSERT_EQ(0, metrics2.num_lost_sdus); // No lost SDUs
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return SRSRAN_SUCCESS;
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}
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int main(int argc, char** argv)
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{
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// Setup the log message spy to intercept error and warning log entries from RLC
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if (!srslog::install_custom_sink(srsran::log_sink_message_spy::name(),
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std::unique_ptr<srsran::log_sink_message_spy>(
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new srsran::log_sink_message_spy(srslog::get_default_log_formatter())))) {
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return SRSRAN_ERROR;
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}
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auto* spy = static_cast<srsran::log_sink_message_spy*>(srslog::find_sink(srsran::log_sink_message_spy::name()));
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if (spy == nullptr) {
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return SRSRAN_ERROR;
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}
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srslog::set_default_sink(*spy);
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auto& logger_rlc1 = srslog::fetch_basic_logger("RLC_AM_1", *spy, false);
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auto& logger_rlc2 = srslog::fetch_basic_logger("RLC_AM_2", *spy, false);
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logger_rlc1.set_hex_dump_max_size(100);
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logger_rlc2.set_hex_dump_max_size(100);
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logger_rlc1.set_level(srslog::basic_levels::debug);
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logger_rlc2.set_level(srslog::basic_levels::debug);
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// start log backend
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srslog::init();
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TESTASSERT(basic_test() == SRSRAN_SUCCESS);
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TESTASSERT(lost_pdu_test() == SRSRAN_SUCCESS);
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return SRSRAN_SUCCESS;
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}
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