/** * * \section COPYRIGHT * * Copyright 2013-2021 Software Radio Systems Limited * * By using this file, you agree to the terms and conditions set * forth in the LICENSE file which can be found at the top level of * the distribution. * */ #include "srsran/common/buffer_pool.h" #include "srsran/common/rlc_pcap.h" #include "srsran/common/test_common.h" #include "srsran/common/threads.h" #include "srsran/interfaces/ue_pdcp_interfaces.h" #include "srsran/interfaces/ue_rrc_interfaces.h" #include "srsran/upper/rlc_am_lte.h" #define NBUFS 5 #define HAVE_PCAP 0 #define SDU_SIZE 500 using namespace srsue; using namespace srsran; bool rx_is_tx(const rlc_bearer_metrics_t& rlc1_metrics, const rlc_bearer_metrics_t& rlc2_metrics) { if (rlc1_metrics.num_tx_pdu_bytes != rlc2_metrics.num_rx_pdu_bytes) { return false; } if (rlc2_metrics.num_tx_pdu_bytes != rlc1_metrics.num_rx_pdu_bytes) { return false; } return true; } class rlc_am_tester : public pdcp_interface_rlc, public rrc_interface_rlc { public: rlc_am_tester(rlc_pcap* pcap_ = NULL) : pcap(pcap_) {} // PDCP interface void write_pdu(uint32_t lcid, unique_byte_buffer_t sdu) { assert(lcid == 1); sdus.push_back(std::move(sdu)); } void write_pdu_bcch_bch(unique_byte_buffer_t sdu) {} void write_pdu_bcch_dlsch(unique_byte_buffer_t sdu) {} void write_pdu_pcch(unique_byte_buffer_t sdu) {} void write_pdu_mch(uint32_t lcid, srsran::unique_byte_buffer_t pdu) {} void notify_delivery(uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sn_vec) { assert(lcid == 1); for (uint32_t pdcp_sn : pdcp_sn_vec) { if (notified_counts.find(pdcp_sn) == notified_counts.end()) { notified_counts[pdcp_sn] = 0; } notified_counts[pdcp_sn] += 1; } } void notify_failure(uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sn_vec) { assert(lcid == 1); // TODO } // RRC interface void max_retx_attempted() { max_retx_triggered = true; } const char* get_rb_name(uint32_t lcid) { return ""; } std::vector sdus; rlc_pcap* pcap = nullptr; bool max_retx_triggered = false; std::map notified_counts; // Map of PDCP SNs to number of notifications }; class ul_writer : public thread { public: ul_writer(rlc_am_lte* rlc_) : rlc(rlc_), running(false), thread("UL_WRITER") {} ~ul_writer() { stop(); } void stop() { running = false; int cnt = 0; while (running && cnt < 100) { usleep(10000); cnt++; } wait_thread_finish(); } private: void run_thread() { int sn = 0; running = true; while (running) { unique_byte_buffer_t pdu = srsran::make_byte_buffer(); if (!pdu) { printf("Error: Could not allocate PDU in rlc_tester::run_thread\n\n\n"); // backoff for a bit usleep(1000); continue; } for (uint32_t i = 0; i < SDU_SIZE; i++) { pdu->msg[i] = sn; } sn++; pdu->N_bytes = SDU_SIZE; rlc->write_sdu(std::move(pdu)); } running = false; } rlc_am_lte* rlc; bool running; }; int basic_test_tx(rlc_am_lte* rlc, byte_buffer_t pdu_bufs[NBUFS]) { // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); sdu_bufs[i]->msg[0] = i; // Write the index into the buffer sdu_bufs[i]->N_bytes = 1; // Give each buffer a size of 1 byte sdu_bufs[i]->md.pdcp_sn = i; // PDCP SN for notifications rlc->write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(13 == rlc->get_buffer_state()); // 2 Bytes for fixed header + 6 for LIs + 5 for payload // Read 5 PDUs from RLC1 (1 byte each) for (int i = 0; i < NBUFS; i++) { uint32_t len = rlc->read_pdu(pdu_bufs[i].msg, 3); // 2 bytes for header + 1 byte payload pdu_bufs[i].N_bytes = len; TESTASSERT(3 == len); } TESTASSERT(0 == rlc->get_buffer_state()); return SRSRAN_SUCCESS; } int basic_test() { rlc_am_tester tester; timer_handler timers(8); byte_buffer_t pdu_bufs[NBUFS]; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); // before configuring entity TESTASSERT(0 == rlc1.get_buffer_state()); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } basic_test_tx(&rlc1, pdu_bufs); // Write 5 PDUs into RLC2 for (int i = 0; i < NBUFS; i++) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } TESTASSERT(2 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; int len = rlc2.read_pdu(status_buf.msg, 2); status_buf.N_bytes = len; TESTASSERT(0 == rlc2.get_buffer_state()); // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.ack_sn == 5); // 5 is the last SN that was not received. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check PDCP notifications TESTASSERT(tester.notified_counts.size() == 5); for (uint16_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 1); TESTASSERT(*(tester.sdus[i]->msg) == i); TESTASSERT(tester.notified_counts[i] == 1); } // Check statistics TESTASSERT(rx_is_tx(rlc1.get_metrics(), rlc2.get_metrics())); return SRSRAN_SUCCESS; } int concat_test() { rlc_am_tester tester; srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); sdu_bufs[i]->msg[0] = i; // Write the index into the buffer sdu_bufs[i]->N_bytes = 1; // Give each buffer a size of 1 byte sdu_bufs[i]->md.pdcp_sn = i; // PDCP SN for notifications rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(13 == rlc1.get_buffer_state()); // 2 Bytes for fixed header + 6 for LIs + 5 for payload // Read 1 PDUs from RLC1 containing all 5 SDUs byte_buffer_t pdu_buf; int len = rlc1.read_pdu(pdu_buf.msg, 13); // 8 bytes for header + payload pdu_buf.N_bytes = len; TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDU into RLC2 rlc2.write_pdu(pdu_buf.msg, pdu_buf.N_bytes); // Check status report TESTASSERT(2 == rlc2.get_buffer_state()); byte_buffer_t status_buf; len = rlc2.read_pdu(status_buf.msg, 2); status_buf.N_bytes = len; TESTASSERT(0 == rlc2.get_buffer_state()); // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.ack_sn == 1); // 1 is the last SN that was not received. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 1); TESTASSERT(*(tester.sdus[i]->msg) == i); } // Check PDCP notifications TESTASSERT(tester.notified_counts.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 1); TESTASSERT(*(tester.sdus[i]->msg) == i); TESTASSERT(tester.notified_counts[i] == 1); } // Check statistics TESTASSERT(rx_is_tx(rlc1.get_metrics(), rlc2.get_metrics())); return SRSRAN_SUCCESS; } int segment_test(bool in_seq_rx) { rlc_am_tester tester; srsran::timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 10; j++) sdu_bufs[i]->msg[j] = j; sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; // PDCP SN for notifications rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(58 == rlc1.get_buffer_state()); // 2 bytes for header + 6 bytes for LI + 50 bytes for payload // Read PDUs from RLC1 (force segmentation) byte_buffer_t pdu_bufs[20]; int n_pdus = 0; while (rlc1.get_buffer_state() > 0) { len = rlc1.read_pdu(pdu_bufs[n_pdus].msg, 10); // 2 header + payload pdu_bufs[n_pdus++].N_bytes = len; } TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 if (in_seq_rx) { // deliver PDUs in order for (int i = 0; i < n_pdus; ++i) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } } else { // deliver PDUs in reverse order for (int i = n_pdus - 1; i >= 0; --i) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } } // Receiver will only generate status PDU if they arrive in order // If SN=7 arrives first, but the Rx expects SN=0, status reporting will be delayed, see TS 36.322 v10 Section 5.2.3 if (in_seq_rx) { TESTASSERT(2 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; len = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status status_buf.N_bytes = len; // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.ack_sn == n_pdus); // n_pdus (8) is the last SN that was not received. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check all notification of ack'ed PDUs TESTASSERT(tester.notified_counts.size() == 5); for (int i = 0; i < NBUFS; i++) { auto not_it = tester.notified_counts.find(i); TESTASSERT(not_it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } } TESTASSERT(0 == rlc2.get_buffer_state()); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 10); for (int j = 0; j < 10; j++) { TESTASSERT(tester.sdus[i]->msg[j] == j); } } // Check statistics TESTASSERT(rx_is_tx(rlc1.get_metrics(), rlc2.get_metrics())); return SRSRAN_SUCCESS; } int retx_test() { rlc_am_tester tester; timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); sdu_bufs[i]->msg[0] = i; // Write the index into the buffer sdu_bufs[i]->N_bytes = 1; // Give each buffer a size of 1 byte sdu_bufs[i]->md.pdcp_sn = i; // PDCP SN for notifications rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(13 == rlc1.get_buffer_state()); // Read 5 PDUs from RLC1 (1 byte each) byte_buffer_t pdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { len = rlc1.read_pdu(pdu_bufs[i].msg, 3); // 2 byte header + 1 byte payload pdu_bufs[i].N_bytes = len; } TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 1) for (int i = 0; i < NBUFS; i++) { if (i != 1) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } } // check buffered bytes at receiver, 3 PDUs with one 1 B each (SN=0 has been delivered already) rlc_bearer_metrics_t metrics = rlc2.get_metrics(); TESTASSERT(metrics.rx_buffered_bytes == 3); // Step timers until reordering timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } uint32_t buffer_state = rlc2.get_buffer_state(); TESTASSERT(4 == buffer_state); // Read status PDU from RLC2 byte_buffer_t status_buf; len = rlc2.read_pdu(status_buf.msg, buffer_state); // provide exactly the reported buffer state status_buf.N_bytes = len; // Assert all bytes for status PDU were read buffer_state = rlc2.get_buffer_state(); TESTASSERT(0 == buffer_state); // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // 1 packet was lost. TESTASSERT(status_check.nacks[0].nack_sn == 1); // SN 1 was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 4. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); TESTASSERT(3 == rlc1.get_buffer_state()); // 2 byte header + 1 byte payload // Check notifications of ack'ed PDUs TESTASSERT(tester.notified_counts.size() == 4); for (int i = 0; i < NBUFS; i++) { auto not_it = tester.notified_counts.find(i); if (i != 1) { TESTASSERT(not_it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } else { TESTASSERT(not_it == tester.notified_counts.end()); } } // Read the retx PDU from RLC1 byte_buffer_t retx; len = rlc1.read_pdu(retx.msg, 3); // 2 byte header + 1 byte payload retx.N_bytes = len; // Write the retx PDU to RLC2 rlc2.write_pdu(retx.msg, retx.N_bytes); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { if (tester.sdus[i]->N_bytes != 1) return -1; if (*(tester.sdus[i]->msg) != i) return -1; } // Step timers until poll Retx timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } // Get status report of RETX PDU buffer_state = rlc2.get_buffer_state(); TESTASSERT(2 == buffer_state); len = rlc2.read_pdu(status_buf.msg, buffer_state); // provide exactly the reported buffer state status_buf.N_bytes = len; // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // No packet was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 4. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check all notification of ack'ed PDUs TESTASSERT(tester.notified_counts.size() == 5); for (int i = 0; i < NBUFS; i++) { auto not_it = tester.notified_counts.find(i); TESTASSERT(not_it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return 0; } // Test correct upper layer signaling when maxRetx (default 4) have been reached int max_retx_test() { rlc_am_tester tester; timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); const rlc_config_t rlc_cfg = rlc_config_t::default_rlc_am_config(); if (not rlc1.configure(rlc_cfg)) { return -1; } // Push 2 SDUs into RLC1 const uint32_t n_sdus = 2; unique_byte_buffer_t sdu_bufs[n_sdus]; for (uint32_t i = 0; i < n_sdus; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); sdu_bufs[i]->msg[0] = i; // Write the index into the buffer sdu_bufs[i]->N_bytes = 1; // Give each buffer a size of 1 byte sdu_bufs[i]->md.pdcp_sn = i; // PDCP SN for notifications rlc1.write_sdu(std::move(sdu_bufs[i])); } // Read 2 PDUs from RLC1 (1 byte each) const uint32_t n_pdus = 2; byte_buffer_t pdu_bufs[n_pdus]; for (uint32_t i = 0; i < n_pdus; i++) { len = rlc1.read_pdu(pdu_bufs[i].msg, 3); // 2 byte header + 1 byte payload pdu_bufs[i].N_bytes = len; } TESTASSERT(0 == rlc1.get_buffer_state()); // Fake status PDU that ack SN=1 rlc_status_pdu_t fake_status = {}; fake_status.ack_sn = 2; // delivered up to SN=1 fake_status.N_nack = 1; // one SN was lost fake_status.nacks[0].nack_sn = 0; // it was SN=0 that was lost // pack into PDU byte_buffer_t status_pdu; rlc_am_write_status_pdu(&fake_status, &status_pdu); // We've Tx'ed once already, loop until the max is reached for (uint32_t retx_count = 0; retx_count < rlc_cfg.am.max_retx_thresh; ++retx_count) { // we've not yet reached max attempts TESTASSERT(tester.max_retx_triggered == false); // Write status PDU to RLC1 rlc1.write_pdu(status_pdu.msg, status_pdu.N_bytes); byte_buffer_t pdu_buf; len = rlc1.read_pdu(pdu_buf.msg, 3); } // Now maxRetx should have been triggered TESTASSERT(tester.max_retx_triggered == true); return SRSRAN_SUCCESS; } // Purpose: test correct retx of lost segment and pollRetx timer expiration int segment_retx_test() { rlc_am_tester tester; timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push SDU(s) into RLC1 const uint32_t nof_sdus = 1; // just one SDU to make sure the transmitter sets polling bit unique_byte_buffer_t sdu_bufs[nof_sdus]; for (uint32_t i = 0; i < nof_sdus; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes std::fill(sdu_bufs[i]->msg, sdu_bufs[i]->msg + sdu_bufs[i]->N_bytes, 0); sdu_bufs[i]->msg[0] = i; // Write the index into the buffer rlc1.write_sdu(std::move(sdu_bufs[i])); } // Read 2 PDUs from RLC1 const uint32_t nof_pdus = 2; byte_buffer_t pdu_bufs[nof_pdus]; for (uint32_t i = 0; i < nof_pdus; i++) { len = rlc1.read_pdu(pdu_bufs[i].msg, 7); // 2 byte header pdu_bufs[i].N_bytes = len; } TESTASSERT(rlc1.get_buffer_state() == 0); // Step timers until poll Retx timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } uint32_t buffer_state = rlc1.get_buffer_state(); TESTASSERT(buffer_state == 7); // Read retx PDU from RLC1 byte_buffer_t retx_pdu; len = rlc1.read_pdu(retx_pdu.msg, buffer_state); // provide exactly the reported buffer state retx_pdu.N_bytes = len; // Write retx segment to RLC2 rlc2.write_pdu(retx_pdu.msg, retx_pdu.N_bytes); buffer_state = rlc2.get_buffer_state(); // Status PDU TESTASSERT(buffer_state == 2); // Read status PDU from RLC2 byte_buffer_t status_buf; len = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status status_buf.N_bytes = len; // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // No packet was lost. TESTASSERT(status_check.ack_sn == 1); // Delivered up to SN 0. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Make sure no notifications yet TESTASSERT(tester.notified_counts.size() == 0); // Step timers again until poll Retx timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } // read buffer state from RLC1 again to see if it has rescheduled SN=1 for retx buffer_state = rlc1.get_buffer_state(); // Status PDU TESTASSERT(buffer_state == 7); // Read 2nd retx PDU from RLC1 byte_buffer_t retx_pdu2; len = rlc1.read_pdu(retx_pdu2.msg, buffer_state); // provide exactly the reported buffer state retx_pdu2.N_bytes = len; // Write retx segment to RLC2 rlc2.write_pdu(retx_pdu2.msg, retx_pdu2.N_bytes); // read Status PDU from RLC2 again len = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status status_buf.N_bytes = len; rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // No packet was lost. TESTASSERT(status_check.ack_sn == 2); // Delivered up to SN 0. // Make sure SDU was notified TESTASSERT(tester.notified_counts.size() == 1); TESTASSERT(tester.notified_counts.find(0) != tester.notified_counts.end() && tester.notified_counts[0] == 1); TESTASSERT(tester.sdus.size() == nof_sdus); for (uint32_t i = 0; i < tester.sdus.size(); i++) { if (tester.sdus[i]->N_bytes != 10) { return SRSRAN_ERROR; } if (*(tester.sdus[i]->msg) != i) { return SRSRAN_ERROR; } } return SRSRAN_SUCCESS; } int resegment_test_1() { // SDUs: | 10 | 10 | 10 | 10 | 10 | // PDUs: | 10 | 10 | 10 | 10 | 10 | // Retx PDU segments: | 5 | 5| rlc_am_tester tester; timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 10; j++) sdu_bufs[i]->msg[j] = j; sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(58 == rlc1.get_buffer_state()); // 2 bytes for fixed header, 6 bytes for LIs, 50 bytes for data // Read 5 PDUs from RLC1 (10 bytes each) byte_buffer_t pdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { len = rlc1.read_pdu(pdu_bufs[i].msg, 12); // 12 bytes for header + payload pdu_bufs[i].N_bytes = len; } TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 1) for (int i = 0; i < NBUFS; i++) { if (i != 1) rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } // Step timers until reordering timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } TESTASSERT(4 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; len = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status status_buf.N_bytes = len; // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // 1 packet was lost. TESTASSERT(status_check.nacks[0].nack_sn == 1); // SN 1 was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); TESTASSERT(12 == rlc1.get_buffer_state()); // 2 byte header + 10 data // Check notifications srslog::fetch_basic_logger("RLC_AM_1").debug("%ld", tester.notified_counts.size()); TESTASSERT(tester.notified_counts.size() == 4); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); if (i != 1) { TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } else { TESTASSERT(it == tester.notified_counts.end()); } } // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; len = rlc1.read_pdu(retx1.msg, 9); // 4 byte header + 5 data retx1.N_bytes = len; // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); TESTASSERT(9 == rlc1.get_buffer_state()); // Step timers to get status report for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } // Read status PDU from RLC2 status_buf = {}; len = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status status_buf.N_bytes = len; // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // 1 packet was lost. TESTASSERT(status_check.nacks[0].nack_sn == 1); // SN 1 was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Read the remaining segment byte_buffer_t retx2; len = rlc1.read_pdu(retx2.msg, 9); // 4 byte header + 5 data retx2.N_bytes = len; // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { if (tester.sdus[i]->N_bytes != 10) return -1; for (int j = 0; j < 10; j++) if (tester.sdus[i]->msg[j] != j) return -1; } // Step timers to get status report for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } // Read status PDU from RLC2 status_buf = {}; len = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status status_buf.N_bytes = len; // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // all packets delivered. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check notifications TESTASSERT(tester.notified_counts.size() == 5); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return 0; } int resegment_test_2() { // SDUs: | 10 | 10 | 10 | 10 | 10 | // PDUs: | 5 | 10 | 20 | 10 | 5 | // Retx PDU segments: | 10 | 10 | rlc_am_tester tester; timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 10; j++) sdu_bufs[i]->msg[j] = j; sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; // Give each buffer a size of 10 bytes rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(58 == rlc1.get_buffer_state()); // Read 5 PDUs from RLC1 (5 bytes, 10 bytes, 20 bytes, 10 bytes, 5 bytes) byte_buffer_t pdu_bufs[NBUFS]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 7); // 2 byte header + 5 byte payload pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 14); // 4 byte header + 10 byte payload pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 25); // 5 byte header + 20 byte payload pdu_bufs[3].N_bytes = rlc1.read_pdu(pdu_bufs[3].msg, 14); // 4 byte header + 10 byte payload pdu_bufs[4].N_bytes = rlc1.read_pdu(pdu_bufs[4].msg, 7); // 2 byte header + 5 byte payload TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 2) for (int i = 0; i < NBUFS; i++) { if (i != 2) rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } // Step timers until reordering timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } TESTASSERT(4 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // One packet was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); TESTASSERT(25 == rlc1.get_buffer_state()); // 4 byte header + 20 data // Check notifications TESTASSERT(tester.notified_counts.size() == 2); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); if (i == 0 || i == 4) { TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } else { TESTASSERT(it == tester.notified_counts.end()); } } // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 16); // 6 byte header + 10 data // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); TESTASSERT(16 == rlc1.get_buffer_state()); // Read the remaining segment byte_buffer_t retx2; retx2.N_bytes = rlc1.read_pdu(retx2.msg, 18); // 6 byte header + 12 data // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { if (tester.sdus[i]->N_bytes != 10) return -1; for (int j = 0; j < 10; j++) if (tester.sdus[i]->msg[j] != j) return -1; } // Step timers until reordering timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // all packets delivered. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); TESTASSERT(tester.notified_counts.size() == 5); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return 0; } int resegment_test_3() { // SDUs: | 10 | 10 | 10 | 10 | 10 | // PDUs: | 5 | 5| 20 | 10 | 10 | // Retx PDU segments: | 10 | 10 | rlc_am_tester tester; srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 10; j++) sdu_bufs[i]->msg[j] = j; sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(58 == rlc1.get_buffer_state()); // Read 5 PDUs from RLC1 (5 bytes, 5 bytes, 20 bytes, 10 bytes, 10 bytes) byte_buffer_t pdu_bufs[NBUFS]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 7); // 2 byte header + 5 byte payload pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 7); // 2 byte header + 5 byte payload pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 24); // 4 byte header + 20 byte payload pdu_bufs[3].N_bytes = rlc1.read_pdu(pdu_bufs[3].msg, 12); // 2 byte header + 10 byte payload pdu_bufs[4].N_bytes = rlc1.read_pdu(pdu_bufs[4].msg, 12); // 2 byte header + 10 byte payload TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 2) for (int i = 0; i < NBUFS; i++) { if (i != 2) rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } // Step timers until reordering timeout expires for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } TESTASSERT(4 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // One packet was lost. TESTASSERT(status_check.nacks[0].nack_sn == 2); // SN 2 was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check notifications TESTASSERT(tester.notified_counts.size() == 3); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); if (i == 0 || i == 3 || i == 4) { TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } else { TESTASSERT(it == tester.notified_counts.end()); } } // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 16); // 6 byte header + 10 data // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); // Read the remaining segment byte_buffer_t retx2; retx2.N_bytes = rlc1.read_pdu(retx2.msg, 16); // 6 byte header + 10 data // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { if (tester.sdus[i]->N_bytes != 10) return -1; for (int j = 0; j < 10; j++) if (tester.sdus[i]->msg[j] != j) return -1; } // Get status from RLC 2 for (int cnt = 0; cnt < 5; cnt++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // all packets delivered. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check final notifications TESTASSERT(tester.notified_counts.size() == 5); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return 0; } int resegment_test_4() { // SDUs: | 10 | 10 | 10 | 10 | 10 | // PDUs: | 5 | 5| 30 | 5 | 5| // Retx PDU segments: | 15 | 15 | rlc_am_tester tester; srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 10; j++) sdu_bufs[i]->msg[j] = j; sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(58 == rlc1.get_buffer_state()); // Read 5 PDUs from RLC1 (5 bytes, 5 bytes, 30 bytes, 5 bytes, 5 bytes) byte_buffer_t pdu_bufs[NBUFS]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 7); // 2 byte header + 5 byte payload pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 7); // 2 byte header + 5 byte payload pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 35); // 5 byte header + 30 byte payload pdu_bufs[3].N_bytes = rlc1.read_pdu(pdu_bufs[3].msg, 7); // 2 byte header + 5 byte payload pdu_bufs[4].N_bytes = rlc1.read_pdu(pdu_bufs[4].msg, 7); // 2 byte header + 5 byte payload TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 2) for (int i = 0; i < NBUFS; i++) { if (i != 2) rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } TESTASSERT(4 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // one packet lost. TESTASSERT(status_check.nacks[0].nack_sn == 2); // SN 2 was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); TESTASSERT(tester.notified_counts.size() == 2); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); if (i == 0 || i == 4) { TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } else { TESTASSERT(it == tester.notified_counts.end()); } } // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 21); // 6 byte header + 15 data // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); TESTASSERT(21 == rlc1.get_buffer_state()); // Read the remaining segment byte_buffer_t retx2; retx2.N_bytes = rlc1.read_pdu(retx2.msg, 21); // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { if (tester.sdus[i]->N_bytes != 10) return -1; for (int j = 0; j < 10; j++) if (tester.sdus[i]->msg[j] != j) return -1; } // Get status from RLC 2 for (int i = 0; i < 5; i++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // all packets delivered. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check final notifications TESTASSERT(tester.notified_counts.size() == 5); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return 0; } int resegment_test_5() { // SDUs: | 10 | 10 | 10 | 10 | 10 | // PDUs: |2|3| 40 |3|2| // Retx PDU segments: | 20 | 20 | rlc_am_tester tester; srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[NBUFS]; for (int i = 0; i < NBUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 10; j++) { sdu_bufs[i]->msg[j] = i; } sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(58 == rlc1.get_buffer_state()); // Read 5 PDUs from RLC1 (2 bytes, 3 bytes, 40 bytes, 3 bytes, 2 bytes) byte_buffer_t pdu_bufs[NBUFS]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 4); // 2 byte header + 2 byte payload pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 5); // 2 byte header + 3 byte payload pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 48); // 8 byte header + 40 byte payload pdu_bufs[3].N_bytes = rlc1.read_pdu(pdu_bufs[3].msg, 5); // 2 byte header + 3 byte payload pdu_bufs[4].N_bytes = rlc1.read_pdu(pdu_bufs[4].msg, 4); // 2 byte header + 2 byte payload TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 2) for (int i = 0; i < NBUFS; i++) { if (i != 2) rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } TESTASSERT(4 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // one packet was lost. TESTASSERT(status_check.nacks[0].nack_sn == 2); // SN 2 was lost. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check notifications TESTASSERT(tester.notified_counts.size() == 0); // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 27); // 7 byte header + 20 data // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); TESTASSERT(32 == rlc1.get_buffer_state()); // Read the remaining segment byte_buffer_t retx2; retx2.N_bytes = rlc1.read_pdu(retx2.msg, 40); // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); TESTASSERT(tester.sdus.size() == 5); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 10); for (int j = 0; j < 10; j++) { TESTASSERT(tester.sdus[i]->msg[j] == i); } } // Get status from RLC 2 for (int i = 0; i < 5; i++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // all packets delivered. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check final notifications TESTASSERT(tester.notified_counts.size() == 5); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return 0; } int resegment_test_6() { // SDUs: |10|10|10| 54 | 54 | 54 | 54 | 54 | 54 | // PDUs: |10|10|10| 270 | 54 | // Retx PDU segments: | 120 | 150 | rlc_am_tester tester; srsran::timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push SDUs into RLC1 unique_byte_buffer_t sdu_bufs[9]; for (int i = 0; i < 3; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 10; j++) sdu_bufs[i]->msg[j] = j; sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } for (int i = 3; i < 9; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (int j = 0; j < 54; j++) sdu_bufs[i]->msg[j] = j; sdu_bufs[i]->N_bytes = 54; sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(368 == rlc1.get_buffer_state()); // Read PDUs from RLC1 (10, 10, 10, 270, 54) byte_buffer_t pdu_bufs[5]; for (int i = 0; i < 3; i++) { len = rlc1.read_pdu(pdu_bufs[i].msg, 12); pdu_bufs[i].N_bytes = len; } len = rlc1.read_pdu(pdu_bufs[3].msg, 278); pdu_bufs[3].N_bytes = len; len = rlc1.read_pdu(pdu_bufs[4].msg, 56); pdu_bufs[4].N_bytes = len; TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 3) for (int i = 0; i < 5; i++) { if (i != 3) rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } TESTASSERT(4 == rlc2.get_buffer_state()); // Read status PDU from RLC2 byte_buffer_t status_buf; len = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status status_buf.N_bytes = len; // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // One packet was lost. TESTASSERT(status_check.nacks[0].nack_sn == 3); // SN 3 was lost. TESTASSERT(status_check.ack_sn == 5); // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); TESTASSERT(278 == rlc1.get_buffer_state()); // Check notifications TESTASSERT(tester.notified_counts.size() == 4); for (int i = 0; i < 5; i++) { auto it = tester.notified_counts.find(i); if (i == 0 || i == 1 || i == 2 || i == 8) { TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } else { TESTASSERT(it == tester.notified_counts.end()); } } // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; len = rlc1.read_pdu(retx1.msg, 129); retx1.N_bytes = len; // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); TESTASSERT(169 == rlc1.get_buffer_state()); // Read the remaining segment byte_buffer_t retx2; len = rlc1.read_pdu(retx2.msg, 169); retx2.N_bytes = len; // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); TESTASSERT(tester.sdus.size() == 9); for (int i = 0; i < 3; i++) { TESTASSERT(tester.sdus[i]->N_bytes == 10); for (int j = 0; j < 10; j++) TESTASSERT(tester.sdus[i]->msg[j] == j); } for (uint32_t i = 3; i < 9; i++) { if (i >= tester.sdus.size()) { return SRSRAN_ERROR; } TESTASSERT(tester.sdus[i]->N_bytes == 54); for (int j = 0; j < 54; j++) { TESTASSERT(tester.sdus[i]->msg[j] == j); } } // Get status from RLC 2 for (int i = 0; i < 5; i++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // all packets delivered. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check final notifications TESTASSERT(tester.notified_counts.size() == 9); for (int i = 0; i < 9; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return 0; } // Retransmission of PDU segments of the same size int resegment_test_7() { // SDUs: | 30 | 30 | // PDUs: | 13 | 13 | 11 | 13 | 10 | // Rxed PDUs | 13 | 13 | | 13 | 10 | // Retx PDU segments: | 4 | 7 | // Retx PDU segments: |3|3]3|2| const uint32_t N_SDU_BUFS = 2; const uint32_t N_PDU_BUFS = 5; const uint32_t sdu_size = 30; #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_test7.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 2 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[N_SDU_BUFS]; for (uint32_t i = 0; i < N_SDU_BUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (uint32_t j = 0; j < sdu_size; j++) { sdu_bufs[i]->msg[j] = i; } sdu_bufs[i]->N_bytes = sdu_size; // Give each buffer a size of 15 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(64 == rlc1.get_buffer_state()); // Read PDUs from RLC1 (15 bytes each) byte_buffer_t pdu_bufs[N_PDU_BUFS]; for (uint32_t i = 0; i < N_PDU_BUFS; i++) { pdu_bufs[i].N_bytes = rlc1.read_pdu(pdu_bufs[i].msg, 15); // 2 bytes for header + 12 B payload TESTASSERT(pdu_bufs[i].N_bytes); } // Step timers until poll_retx timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } // RLC should try to retx a random PDU because it needs to request a status from the receiver TESTASSERT(0 != rlc1.get_buffer_state()); // Skip PDU with SN 2 for (uint32_t i = 0; i < N_PDU_BUFS; i++) { if (i != 2) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #endif } } // Step timers until reordering timeout expires cnt = 5; while (cnt--) { timers.step_all(); } // RLC should try to retransmit a random PDU because it needs to re-request a status PDU from the receiver TESTASSERT(0 != rlc1.get_buffer_state()); // first round of retx, forcing resegmentation byte_buffer_t retx[4]; for (uint32_t i = 0; i < 4; i++) { TESTASSERT(0 != rlc1.get_buffer_state()); retx[i].N_bytes = rlc1.read_pdu(retx[i].msg, 7); TESTASSERT(retx[i].N_bytes); // Write the last two segments to RLC2 if (i > 1) { rlc2.write_pdu(retx[i].msg, retx[i].N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx[i].msg, retx[i].N_bytes); #endif } } // Read status PDU from RLC2 TESTASSERT(rlc2.get_buffer_state()); byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct rlc_status_pdu_t status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 1); // one packet dropped. TESTASSERT(status_check.nacks[0].nack_sn == 2); // SN 2 dropped. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif TESTASSERT(15 == rlc1.get_buffer_state()); // Check notifications TESTASSERT(tester.notified_counts.size() == 0); // second round of retx, forcing resegmentation byte_buffer_t retx2[4]; for (uint32_t i = 0; i < 4; i++) { TESTASSERT(rlc1.get_buffer_state() != 0); retx2[i].N_bytes = rlc1.read_pdu(retx2[i].msg, 9); TESTASSERT(retx2[i].N_bytes != 0); rlc2.write_pdu(retx2[i].msg, retx2[i].N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx[i].msg, retx[i].N_bytes); #endif } // check buffer states TESTASSERT(0 == rlc1.get_buffer_state()); // Step timers until poll_retx timeout expires cnt = 5; while (cnt--) { timers.step_all(); } // Read status PDU from RLC2 TESTASSERT(rlc2.get_buffer_state()); status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Assert status is correct status_check = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check); TESTASSERT(status_check.N_nack == 0); // all packets delivered. TESTASSERT(status_check.ack_sn == 5); // Delivered up to SN 5. // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif // check status again TESTASSERT(0 == rlc1.get_buffer_state()); TESTASSERT(0 == rlc2.get_buffer_state()); // Check number of SDUs and their content TESTASSERT(tester.sdus.size() == N_SDU_BUFS); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == sdu_size); for (uint32_t j = 0; j < N_SDU_BUFS; j++) { TESTASSERT(tester.sdus[i]->msg[j] == i); } } // Check final notifications TESTASSERT(tester.notified_counts.size() == 2); for (int i = 0; i < 2; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } #if HAVE_PCAP pcap.close(); #endif return 0; } // Retransmission of PDU segments with different size int resegment_test_8() { // SDUs: | 30 | 30 | // PDUs: | 15 | 15 | 15 | 15 | 15 | // Rxed PDUs | 15 | | 15 | 15 | // Retx PDU segments: | 7 | 7 | 7 | 7 | // Retx PDU segments: | 6 | 6 ] 6 | 6 | 6 | 6 | 6 | 6 | const uint32_t N_SDU_BUFS = 2; const uint32_t N_PDU_BUFS = 5; const uint32_t sdu_size = 30; #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_test8.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 2 SDUs into RLC1 unique_byte_buffer_t sdu_bufs[N_SDU_BUFS]; for (uint32_t i = 0; i < N_SDU_BUFS; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (uint32_t j = 0; j < sdu_size; j++) { sdu_bufs[i]->msg[j] = i; } sdu_bufs[i]->N_bytes = sdu_size; // Give each buffer a size of 30 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } TESTASSERT(64 == rlc1.get_buffer_state()); // Read PDUs from RLC1 (15 bytes each) byte_buffer_t pdu_bufs[N_PDU_BUFS]; for (uint32_t i = 0; i < N_PDU_BUFS; i++) { pdu_bufs[i].N_bytes = rlc1.read_pdu(pdu_bufs[i].msg, 15); // 12 bytes for header + payload TESTASSERT(pdu_bufs[i].N_bytes); } TESTASSERT(0 == rlc1.get_buffer_state()); // Skip PDU one and two for (uint32_t i = 0; i < N_PDU_BUFS; i++) { if (i < 1 || i > 2) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #endif } } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } // what PDU to retransmit is random but it must not be zero TESTASSERT(0 != rlc1.get_buffer_state()); // first round of retx, forcing resegmentation byte_buffer_t retx[4]; for (uint32_t i = 0; i < 3; i++) { TESTASSERT(rlc1.get_buffer_state()); retx[i].N_bytes = rlc1.read_pdu(retx[i].msg, 8); TESTASSERT(retx[i].N_bytes); // Write the last two segments to RLC2 if (i > 1) { rlc2.write_pdu(retx[i].msg, retx[i].N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx[i].msg, retx[i].N_bytes); #endif } } // Step timers until reordering timeout expires cnt = 7; while (cnt--) { timers.step_all(); } // Read status PDU from RLC2 TESTASSERT(rlc2.get_buffer_state()); byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif TESTASSERT(15 == rlc1.get_buffer_state()); // second round of retx, reduce grant size to force different segment sizes byte_buffer_t retx2[20]; for (uint32_t i = 0; i < 7; i++) { TESTASSERT(rlc1.get_buffer_state() != 0); retx2[i].N_bytes = rlc1.read_pdu(retx2[i].msg, 9); TESTASSERT(retx2[i].N_bytes != 0); rlc2.write_pdu(retx2[i].msg, retx2[i].N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx[i].msg, retx[i].N_bytes); #endif } // get BSR from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif // check buffer states if (rlc1.get_buffer_state() != 0) { return -1; }; if (rlc2.get_buffer_state() != 0) { return -1; }; // Check number of SDUs and their content TESTASSERT(tester.sdus.size() == N_SDU_BUFS); for (uint32_t i = 0; i < tester.sdus.size(); i++) { if (tester.sdus[i]->N_bytes != sdu_size) return -1; for (uint32_t j = 0; j < N_SDU_BUFS; j++) { if (tester.sdus[i]->msg[j] != i) return -1; } } #if HAVE_PCAP pcap.close(); #endif return 0; } // Resegmentation with 1 B segments int resegment_test_9() { // SDUs: | 10 | 10 | 10 | // PDUs: | 9 | x | // Retx PDU segments: |2| 9 | const rlc_config_t config = rlc_config_t::default_rlc_am_config(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_resegment_test_9.pcap", config); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(config)) { return SRSRAN_ERROR; } if (not rlc2.configure(config)) { return SRSRAN_ERROR; } // Push 3 SDUs into RLC1 const uint32_t n_bufs = 3; unique_byte_buffer_t sdu_bufs[n_bufs]; for (uint32_t i = 0; i < n_bufs; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (uint32_t j = 0; j < 10; j++) { sdu_bufs[i]->msg[j] = i; } sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } // Read 5 PDUs from RLC1 (2 bytes, 3 bytes, 40 bytes, 3 bytes, 2 bytes) byte_buffer_t pdu_bufs[n_bufs]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 11); // 2 byte header + 9 byte payload pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 15); // 4 byte header + 11 byte payload pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 12); // 2 byte header + 10 byte payload TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 0) for (uint32_t i = 0; i < n_bufs; i++) { if (i != 1) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #endif } } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; byte_buffer_t retx2; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 8); // 6 byte header + 2 data // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx1.msg, retx1.N_bytes); #endif // Read 2nd with a big enough grant to fit remaining content retx2.N_bytes = rlc1.read_pdu(retx2.msg, 40); // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx2.msg, retx2.N_bytes); #endif // goto exit; TESTASSERT(tester.sdus.size() == n_bufs); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 10); for (int j = 0; j < 10; j++) { TESTASSERT(tester.sdus[i]->msg[j] == i); } } // Get status from RLC 2 for (int i = 0; i < 5; i++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check final notifications TESTASSERT(tester.notified_counts.size() == n_bufs); for (uint32_t i = 0; i < n_bufs; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } // exit: #if HAVE_PCAP pcap.close(); #endif return 0; } // Retransmission of segment Resegmentation with 1 B segments int resegment_test_10() { /// 21:35:17.369012 [RLC_1] [I] DRB1 Tx PDU SN=520 (20 B) /// 0000: 9e 08 80 40 0a 34 34 34 34 35 35 35 35 35 35 35 /// 0010: 35 35 35 36 /// 21:35:17.369016 [RLC_1] [D] [Data PDU, RF=0, P=0, FI=1, SN=520, LSF=0, SO=0, N_li=2 (4, 10, )] /// 21:35:17.369703 [RLC_1] [I] DRB1 Retx PDU segment SN=520 [so=0] (10 B) (attempt 2/16) /// 0000: fe 08 00 00 00 40 34 34 34 34 /// 21:35:17.369712 [RLC_2] [I] DRB1 Rx data PDU segment of SN=520 (4 B), SO=0, N_li=1 /// 0000: 34 34 34 34 /// 21:35:17.369718 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=1, SN=520, LSF=0, SO=0, N_li=1 (4, )] // SDUs: | 10 | 10 | 10 | 10 | // PDUs: | 6 | 25(x) | 9 | // Retx PDU segments: |4| 50 | const rlc_config_t config = rlc_config_t::default_rlc_am_config(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_resegment_test_10.pcap", config); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(config)) { return SRSRAN_ERROR; } if (not rlc2.configure(config)) { return SRSRAN_ERROR; } // Push 3 SDUs into RLC1 const uint32_t n_sdus = 4; unique_byte_buffer_t sdu_bufs[n_sdus]; for (uint32_t i = 0; i < n_sdus; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (uint32_t j = 0; j < 10; j++) { sdu_bufs[i]->msg[j] = i; } sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } // Read 5 PDUs from RLC1 (2 bytes, 3 bytes, 40 bytes, 3 bytes, 2 bytes) const uint32_t n_pdus = 3; byte_buffer_t pdu_bufs[n_pdus]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 8); // 2 byte header + 6 byte payload pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 32); // 4 byte header + 25 byte payload pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 11); // 2 byte header + 9 byte payload TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 0) for (uint32_t i = 0; i < n_pdus; i++) { if (i != 1) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } #if HAVE_PCAP // write to PCAP even if its lost in the TC pcap.write_dl_ccch(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #endif } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; byte_buffer_t retx2; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 13); // 6 byte header + 4 data ( +2 B MAC) // Write the retx PDU to RLC2 rlc2.write_pdu(retx1.msg, retx1.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx1.msg, retx1.N_bytes); #endif // Read 2nd with a big enough grant to fit remaining content retx2.N_bytes = rlc1.read_pdu(retx2.msg, 32); rlc2.write_pdu(retx2.msg, retx2.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx2.msg, retx2.N_bytes); #endif TESTASSERT(tester.sdus.size() == n_sdus); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 10); for (int j = 0; j < 10; j++) { TESTASSERT(tester.sdus[i]->msg[j] == i); } } // Get status from RLC 2 for (int i = 0; i < 5; i++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Check final notifications TESTASSERT(tester.notified_counts.size() == n_sdus); for (uint32_t i = 0; i < n_sdus; i++) { auto it = tester.notified_counts.find(i); TESTASSERT(it != tester.notified_counts.end() && tester.notified_counts[i] == 1); } return SRSRAN_SUCCESS; } // Custom resegmentation test of a orignal PDU with N_li=2 // Because the provided MAC grant is relativly small, the retx segment // can only accomodate 2 B of the original PDU. // The test verifies the correct PDU packing, specifically the LI value int resegment_test_11() { /// Original PDU: /// 11:29:16.065008 [RLC_1] [I] DRB1 Tx PDU SN=419 (21 B) /// 0000: bd a3 80 50 0a aa aa aa aa aa ab ab ab ab ab ab /// 0010: ab ab ab ab ac /// 11:29:16.065013 [RLC_1] [D] [Data PDU, RF=0, P=1, FI=1, SN=419, LSF=0, SO=0, N_li=2 (5, 10, )] /// Log messages with the restoration bug: /// 11:29:16.065688 [RLC_1] [D] MAC opportunity - 10 bytes /// 11:29:16.065695 [RLC_1] [D] DRB1 build_retx_pdu - resegmentation required /// 11:29:16.065702 [RLC_1] [D] retx.so_start=2, retx.so_end=6 /// 11:29:16.065703 [RLC_1] [D] new_header head_len=4 /// 11:29:16.065706 [RLC_1] [D] old_header.li[0], head_len=6, pdu_space=4 /// 11:29:16.065710 [RLC_1] [D] new_header head_len=6 /// 11:29:16.065713 [RLC_1] [D] old_header.li[1], head_len=8, pdu_space=2 /// 11:29:16.065716 [RLC_1] [D] DRB1 vt_a = 419, vt_ms = 931, vt_s = 426, poll_sn = 424 /// 11:29:16.065718 [RLC_1] [I] DRB1 Retx PDU segment SN=419 [so=2] (8 B) (attempt 2/16) /// 0000: dd a3 00 02 00 30 aa aa /// 11:29:16.065723 [RLC_2] [I] DRB1 Rx data PDU segment of SN=419 (2 B), SO=2, N_li=1 /// 0000: aa aa /// 11:29:16.065730 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=419, LSF=0, SO=2, N_li=1 (3, )] /// NOTE: this segment is malformed, it has 2 B data and a larger LI field of 3 B // SDUs: | 10 | 10 | 10 | 10 | // PDUs: | 15 | 16(x) | 9 | // Retx PDU segments: |4| 50 | const rlc_config_t config = rlc_config_t::default_rlc_am_config(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_resegment_test_11.pcap", config); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(config)) { return SRSRAN_ERROR; } if (not rlc2.configure(config)) { return SRSRAN_ERROR; } // Push 4 SDUs into RLC1 const uint32_t n_sdus = 4; unique_byte_buffer_t sdu_bufs[n_sdus]; for (uint32_t i = 0; i < n_sdus; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (uint32_t j = 0; j < 10; j++) { sdu_bufs[i]->msg[j] = i; } sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } // Read 3 PDUs from RLC1 (MAC opportunities are taken from logs) const uint32_t n_pdus = 3; byte_buffer_t pdu_bufs[n_pdus]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 19); pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 21); pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 12); TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 1) for (uint32_t i = 0; i < n_pdus; i++) { if (i != 1) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } #if HAVE_PCAP // write to PCAP even if its lost in the TC pcap.write_dl_ccch(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #endif } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 8); rlc2.write_pdu(retx1.msg, retx1.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx1.msg, retx1.N_bytes); #endif // Read 2nd with a small grant to trigger the original segmentation bug byte_buffer_t retx2; retx2.N_bytes = rlc1.read_pdu(retx2.msg, 10); // Write the retx PDU to RLC2 rlc2.write_pdu(retx2.msg, retx2.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx2.msg, retx2.N_bytes); #endif // Read 3nd with a big enough grant to fit remaining content byte_buffer_t retx3; retx3.N_bytes = rlc1.read_pdu(retx3.msg, 20); rlc2.write_pdu(retx3.msg, retx3.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx3.msg, retx3.N_bytes); #endif TESTASSERT(tester.sdus.size() == n_sdus); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 10); for (int j = 0; j < 10; j++) { TESTASSERT(tester.sdus[i]->msg[j] == i); } } // Get status from RLC 2 for (int i = 0; i < 5; i++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } // Custom resegmentation test of a orignal PDU with N_li=2 // The test triggered a bug in the packing and was creating a too large // PDU int resegment_test_12() { /// Original PDU: /// 17:19:51.296653 [RLC_1] [I] DRB1 Tx PDU SN=728 (21 B) /// 0000: be d8 80 10 0a d1 d2 d2 d2 d2 d2 d2 d2 d2 d2 d2 /// 0010: d3 d3 d3 d3 d3 /// 17:19:51.296659 [RLC_1] [D] [Data PDU, RF=0, P=1, FI=1, SN=728, LSF=0, SO=0, N_li=2 (1, 10, )] /// Log messages with the segmentation bug: /// 17:19:51.297485 [RLC_1] [D] MAC opportunity - 18 bytes /// 17:19:51.297487 [RLC_1] [D] tx_window size - 2 PDUs /// 17:19:51.297489 [RLC_1] [D] DRB1 build_retx_pdu - resegmentation required /// 17:19:51.297498 [RLC_1] [I] DRB1 pdu_without_poll: 4 /// 17:19:51.297499 [RLC_1] [I] DRB1 byte_without_poll: 67 /// 17:19:51.297501 [RLC_1] [D] retx.so_start=0, retx.so_end=12 /// 17:19:51.297502 [RLC_1] [D] new_header head_len=4 /// 17:19:51.297504 [RLC_1] [D] old_header.li[0], head_len=4, pdu_space=14 /// 17:19:51.297505 [RLC_1] [D] new_header head_len=6 /// 17:19:51.297506 [RLC_1] [D] old_header.li[1], head_len=6, pdu_space=12 /// 17:19:51.297509 [RLC_1] [D] DRB1 vt_a = 724, vt_ms = 212, vt_s = 736, poll_sn = 733 /// 17:19:51.297513 [RLC_1] [E] DRB1 Retx PDU segment length error. Available: 18, Used: 19 /// 17:19:51.297522 [RLC_1] [D] DRB1 Retx PDU segment length error. Header len: 7, Payload len: 12, N_li: 2 /// 17:19:51.297527 [RLC_1] [I] DRB1 Retx PDU segment SN=728 [so=0] (19 B) (attempt 2/16) /// 0000: de d8 00 00 80 10 0a d1 d2 d2 d2 d2 d2 d2 d2 d2 /// 0010: d2 d2 d3 /// 17:19:51.297531 [RLC_2] [I] DRB1 Rx data PDU segment of SN=728 (12 B), SO=0, N_li=2 /// 0000: d1 d2 d2 d2 d2 d2 d2 d2 d2 d2 d2 d3 /// 17:19:51.297538 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=728, LSF=0, SO=0, N_li=2 (1, 10, )] // SDUs: | 10 | 10 | 10 | 10 | // PDUs: | 9 | 16(x) | 9 | // Retx PDU segments: |4| 50 | const rlc_config_t config = rlc_config_t::default_rlc_am_config(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_resegment_test_12.pcap", config); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(config)) { return SRSRAN_ERROR; } if (not rlc2.configure(config)) { return SRSRAN_ERROR; } // Push 4 SDUs into RLC1 const uint32_t n_sdus = 4; unique_byte_buffer_t sdu_bufs[n_sdus]; for (uint32_t i = 0; i < n_sdus; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); for (uint32_t j = 0; j < 10; j++) { sdu_bufs[i]->msg[j] = i; } sdu_bufs[i]->N_bytes = 10; // Give each buffer a size of 10 bytes sdu_bufs[i]->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu_bufs[i])); } // Read 3 PDUs from RLC1 (MAC opportunities are taken from logs) const uint32_t n_pdus = 3; byte_buffer_t pdu_bufs[n_pdus]; pdu_bufs[0].N_bytes = rlc1.read_pdu(pdu_bufs[0].msg, 11); pdu_bufs[1].N_bytes = rlc1.read_pdu(pdu_bufs[1].msg, 21); pdu_bufs[2].N_bytes = rlc1.read_pdu(pdu_bufs[2].msg, 19); TESTASSERT(0 == rlc1.get_buffer_state()); // Write PDUs into RLC2 (skip SN 1) for (uint32_t i = 0; i < n_pdus; i++) { if (i != 1) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } #if HAVE_PCAP // write to PCAP even if its lost in the TC pcap.write_dl_ccch(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); #endif } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } // Read status PDU from RLC2 byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif // Read the retx PDU from RLC1 and force resegmentation byte_buffer_t retx1; retx1.N_bytes = rlc1.read_pdu(retx1.msg, 18); rlc2.write_pdu(retx1.msg, retx1.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx1.msg, retx1.N_bytes); #endif // Read 2nd to trigger the original segmentation bug byte_buffer_t retx2; retx2.N_bytes = rlc1.read_pdu(retx2.msg, 18); rlc2.write_pdu(retx2.msg, retx2.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx2.msg, retx2.N_bytes); #endif // Read 3nd with a big enough grant to fit remaining content byte_buffer_t retx3; retx3.N_bytes = rlc1.read_pdu(retx3.msg, 20); rlc2.write_pdu(retx3.msg, retx3.N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(retx3.msg, retx3.N_bytes); #endif TESTASSERT(tester.sdus.size() == n_sdus); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 10); for (int j = 0; j < 10; j++) { TESTASSERT(tester.sdus[i]->msg[j] == i); } } // Get status from RLC 2 for (int i = 0; i < 5; i++) { timers.step_all(); } // Read status PDU from RLC2 status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 10); // 10 bytes is enough to hold the status // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } // Series of header reconstruction tests that all used canned TV generated with the rlc_stress_test // In this particular case, check correct reconstruction of headers after 2 segment retx int header_reconstruction_test(srsran::log_sink_message_spy& spy) { /// Original SN=277 with 3 segments, including full SDU with 24 /// 13:35:16.337011 [RLC_1] [I] DRB1 Tx PDU SN=277 (20 B) /// 0000: 9d 15 80 20 0a 23 23 24 24 24 24 24 24 24 24 24 /// 0010: 24 25 25 25 /// 13:35:16.337016 [RLC_1] [D] [Data PDU, RF=0, P=0, FI=1, SN=277, LSF=0, SO=0, N_li=2 (2, 10)] // 2nd retransmission with SO=9 std::array tv2 = {0xdd, 0x15, 0x80, 0x09, 0x00, 0x30, 0x24, 0x24, 0x24, 0x25, 0x25, 0x25}; // 3rd retransmission with S0=0 std::array tv3 = { 0xdd, 0x15, 0x00, 0x00, 0x00, 0x20, 0x23, 0x23, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24}; byte_buffer_t pdu_tv2; memcpy(pdu_tv2.msg, tv2.data(), tv2.size()); pdu_tv2.N_bytes = tv2.size(); byte_buffer_t pdu_tv3; memcpy(pdu_tv3.msg, tv3.data(), tv3.size()); pdu_tv3.N_bytes = tv3.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv2.msg, pdu_tv2.N_bytes); pcap.write_dl_ccch(pdu_tv3.msg, pdu_tv3.N_bytes); #endif rlc1.write_pdu(pdu_tv2.msg, pdu_tv2.N_bytes); rlc1.write_pdu(pdu_tv3.msg, pdu_tv3.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=0, FI=1, SN=277, LSF=0, SO=0, N_li=2 (2, 10)]")); #if HAVE_PCAP pcap.close(); #endif return 0; } // Check correct reconstruction of headers after 3 segment retx int header_reconstruction_test2(srsran::log_sink_message_spy& spy) { /// Original SN=199 with 3 segments, including full SDU with d4 /// 15:19:19.148272 [RLC_1] [I] DRB1 Tx PDU SN=199 (19 B) /// 0000: 9c c7 80 30 0a d3 d3 d3 d4 d4 d4 d4 d4 d4 d4 d4 /// 0010: d4 d4 d5 /// 15:19:19.148278 [RLC_1] [D] [Data PDU, RF=0, P=0, FI=1, SN=199, LSF=0, SO=0, N_li=2 (3, 10, )] // 2nd retransmission with SO=0 std::array tv1 = {0xd8, 0xc7, 0x00, 0x00, 0xd3, 0xd3}; // 3rd retransmission with S0=2 std::array tv2 = { 0xdc, 0xc7, 0x00, 0x02, 0x00, 0x10, 0xd3, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4}; std::array tv3 = {0xdc, 0xc7, 0x80, 0x0c, 0x00, 0x10, 0xd4, 0xd5}; byte_buffer_t pdu_tv1; memcpy(pdu_tv1.msg, tv1.data(), tv1.size()); pdu_tv1.N_bytes = tv1.size(); byte_buffer_t pdu_tv2; memcpy(pdu_tv2.msg, tv2.data(), tv2.size()); pdu_tv2.N_bytes = tv2.size(); byte_buffer_t pdu_tv3; memcpy(pdu_tv3.msg, tv3.data(), tv3.size()); pdu_tv3.N_bytes = tv3.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test2.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv1.msg, pdu_tv1.N_bytes); pcap.write_dl_ccch(pdu_tv2.msg, pdu_tv2.N_bytes); pcap.write_dl_ccch(pdu_tv3.msg, pdu_tv3.N_bytes); #endif rlc1.write_pdu(pdu_tv1.msg, pdu_tv1.N_bytes); rlc1.write_pdu(pdu_tv2.msg, pdu_tv2.N_bytes); rlc1.write_pdu(pdu_tv3.msg, pdu_tv3.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=0, FI=1, SN=199, LSF=0, SO=0, N_li=2 (3, 10)]")); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } // TC with 3 segment retx int header_reconstruction_test3(srsran::log_sink_message_spy& spy) { // Original PDU // 11:13:25.994566 [RLC_1] [I] DRB1 Tx PDU SN=206 (18 B) // 0000: 8c ce 00 a0 db db db db db db db db db db dc dc // 0010: dc dc // 11:13:25.994571 [RLC_1] [D] [Data PDU, RF=0, P=0, FI=1, SN=206, LSF=0, SO=0, N_li=1 (10)] // 11:13:25.995744 [RLC_1] [I] DRB1 Retx PDU segment SN=206 [so=8] (12 B) (attempt 2/16) // 0000: dc ce 80 08 00 20 db db dc dc dc dc // 11:13:25.995752 [RLC_2] [I] DRB1 Rx data PDU segment of SN=206 (6 B), SO=8, N_li=1 // 0000: db db dc dc dc dc std::array tv0 = {0xdc, 0xce, 0x80, 0x08, 0x00, 0x20, 0xdb, 0xdb, 0xdc, 0xdc, 0xdc, 0xdc}; // 11:13:25.996267 [RLC_1] [I] DRB1 Retx PDU segment SN=206 [so=0] (14 B) (attempt 3/16) // 0000: c0 ce 00 00 db db db db db db db db db db // 11:13:25.996272 [RLC_2] [I] DRB1 Rx data PDU segment of SN=206 (10 B), SO=0, N_li=0 // 0000: db db db db db db db db db db std::array tv1 = {0xc0, 0xce, 0x00, 0x00, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb}; byte_buffer_t pdu_tv0; memcpy(pdu_tv0.msg, tv0.data(), tv0.size()); pdu_tv0.N_bytes = tv0.size(); byte_buffer_t pdu_tv1; memcpy(pdu_tv1.msg, tv1.data(), tv1.size()); pdu_tv1.N_bytes = tv1.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test3.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); // configure RLC rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv0.msg, pdu_tv0.N_bytes); pcap.write_dl_ccch(pdu_tv1.msg, pdu_tv1.N_bytes); #endif rlc1.write_pdu(pdu_tv0.msg, pdu_tv0.N_bytes); rlc1.write_pdu(pdu_tv1.msg, pdu_tv1.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=0, FI=1, SN=206, LSF=0, SO=0, N_li=1 (10)]")); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } int header_reconstruction_test4(srsran::log_sink_message_spy& spy) { // Original PDU // 15:32:20.667043 [RLC_1] [I] DRB1 Tx PDU SN=172 (22 B) // 0000: 9c ac 80 10 0a af b0 b0 b0 b0 b0 b0 b0 b0 b0 b0 // 0010: b1 b1 b1 b1 b1 b1 // 15:32:20.667048 [RLC_1] [D] [Data PDU, RF=0, P=0, FI=1, SN=172, LSF=0, SO=0, N_li=2 (1, 10)] // 15:32:20.668094 [RLC_1] [I] DRB1 Retx PDU segment SN=172 [so=0] (14 B) (attempt 2/16) // 0000: dc ac 00 00 00 10 af b0 b0 b0 b0 b0 b0 b0 // 15:32:20.668100 [RLC_2] [I] DRB1 Rx data PDU segment of SN=172 (8 B), SO=0, N_li=1 // 0000: af b0 b0 b0 b0 b0 b0 b0 // 15:32:20.668105 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=172, LSF=0, SO=0, N_li=1 (1)] std::array tv1 = {0xdc, 0xac, 0x00, 0x00, 0x00, 0x10, 0xaf, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0}; // 15:32:20.668497 [RLC_1] [I] DRB1 Retx PDU segment SN=172 [so=0] (12 B) (attempt 3/16) // 0000: fc ac 00 00 00 10 af b0 b0 b0 b0 b0 // 15:32:20.668502 [RLC_2] [I] DRB1 Rx data PDU segment of SN=172 (6 B), SO=0, N_li=1 // 0000: af b0 b0 b0 b0 b0 // 15:32:20.668507 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=1, SN=172, LSF=0, SO=0, N_li=1 (1)] std::array tv2 = {0xfc, 0xac, 0x00, 0x00, 0x00, 0x10, 0xaf, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0}; // 15:32:20.668575 [RLC_1] [I] DRB1 Retx PDU segment SN=172 [so=6] (7 B) (attempt 3/16) // 0000: d8 ac 00 06 b0 b0 b0 // 15:32:20.668581 [RLC_1] [I] DRB1 Tx SDU (10 B, tx_sdu_queue_len=33) // 0000: d8 d8 d8 d8 d8 d8 d8 d8 d8 d8 // 15:32:20.668582 [RLC_2] [I] DRB1 Rx data PDU segment of SN=172 (3 B), SO=6, N_li=0 // 0000: b0 b0 b0 std::array tv3 = {0xd8, 0xac, 0x00, 0x06, 0xb0, 0xb0, 0xb0}; // 15:32:20.668665 [RLC_1] [I] DRB1 Retx PDU segment SN=172 [so=9] (14 B) (attempt 3/16) // 0000: dc ac 80 09 00 20 b0 b0 b1 b1 b1 b1 b1 b1 // 15:32:20.668671 [RLC_2] [I] DRB1 Rx data PDU segment of SN=172 (8 B), SO=9, N_li=1 // 0000: b0 b0 b1 b1 b1 b1 b1 b1 // 15:32:20.668675 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=172, LSF=1, SO=9, N_li=1 (2)] std::array tv4 = {0xdc, 0xac, 0x80, 0x09, 0x00, 0x20, 0xb0, 0xb0, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1}; byte_buffer_t pdu_tv1; memcpy(pdu_tv1.msg, tv1.data(), tv1.size()); pdu_tv1.N_bytes = tv1.size(); byte_buffer_t pdu_tv2; memcpy(pdu_tv2.msg, tv2.data(), tv2.size()); pdu_tv2.N_bytes = tv2.size(); byte_buffer_t pdu_tv3; memcpy(pdu_tv3.msg, tv3.data(), tv3.size()); pdu_tv3.N_bytes = tv3.size(); byte_buffer_t pdu_tv4; memcpy(pdu_tv4.msg, tv4.data(), tv4.size()); pdu_tv4.N_bytes = tv4.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test4.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); // configure RLC rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv1.msg, pdu_tv1.N_bytes); pcap.write_dl_ccch(pdu_tv2.msg, pdu_tv2.N_bytes); pcap.write_dl_ccch(pdu_tv3.msg, pdu_tv3.N_bytes); pcap.write_dl_ccch(pdu_tv4.msg, pdu_tv4.N_bytes); #endif rlc1.write_pdu(pdu_tv1.msg, pdu_tv1.N_bytes); rlc1.write_pdu(pdu_tv2.msg, pdu_tv2.N_bytes); rlc1.write_pdu(pdu_tv3.msg, pdu_tv3.N_bytes); rlc1.write_pdu(pdu_tv4.msg, pdu_tv4.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=0, FI=1, SN=172, LSF=0, SO=0, N_li=2 (1, 10)]")); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } int header_reconstruction_test5(srsran::log_sink_message_spy& spy) { // Original PDU: // 18:46:22.372858 [RLC_1] [I] DRB1 Tx PDU SN=222 (22 B) // 0000: bc de 80 30 0a ee ee ee ef ef ef ef ef ef ef ef // 0010: ef ef f0 f0 f0 f0 // 18:46:22.372863 [RLC_1] [D] [Data PDU, RF=0, P=1, FI=1, SN=222, LSF=0, SO=0, N_li=2 (3, 10)] // 18:46:22.373623 [RLC_1] [I] DRB1 Retx PDU segment SN=222 [so=0] (7 B) (attempt 2/16) // 0000: d0 de 00 00 ee ee ee // 18:46:22.373629 [RLC_2] [I] DRB1 Rx data PDU segment of SN=222 (3 B), SO=0, N_li=0 // 0000: ee ee ee std::array tv0 = {0xd0, 0xde, 0x00, 0x00, 0xee, 0xee, 0xee}; // 18:46:22.373707 [RLC_1] [I] DRB1 Retx PDU segment SN=222 [so=3] (19 B) (attempt 2/16) // 0000: cc de 00 03 00 a0 ef ef ef ef ef ef ef ef ef ef // 0010: f0 f0 f0 // 18:46:22.373714 [RLC_2] [I] DRB1 Rx data PDU segment of SN=222 (13 B), SO=3, N_li=1 // 0000: ef ef ef ef ef ef ef ef ef ef f0 f0 f0 std::array tv1 = { 0xcc, 0xde, 0x00, 0x03, 0x00, 0xa0, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xf0, 0xf0, 0xf0}; // 18:46:22.373793 [RLC_1] [I] DRB1 Retx PDU segment SN=222 [so=16] (5 B) (attempt 2/16) // 0000: d8 de 80 10 f0 // 18:46:22.373798 [RLC_2] [I] DRB1 Rx data PDU segment of SN=222 (1 B), SO=16, N_li=0 // 0000: f0 std::array tv2 = {0xd8, 0xde, 0x80, 0x10, 0xf0}; byte_buffer_t pdu_tv0; memcpy(pdu_tv0.msg, tv0.data(), tv0.size()); pdu_tv0.N_bytes = tv0.size(); byte_buffer_t pdu_tv1; memcpy(pdu_tv1.msg, tv1.data(), tv1.size()); pdu_tv1.N_bytes = tv1.size(); byte_buffer_t pdu_tv2; memcpy(pdu_tv2.msg, tv2.data(), tv2.size()); pdu_tv2.N_bytes = tv2.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test5.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); // configure RLC rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv0.msg, pdu_tv0.N_bytes); pcap.write_dl_ccch(pdu_tv1.msg, pdu_tv1.N_bytes); pcap.write_dl_ccch(pdu_tv2.msg, pdu_tv2.N_bytes); #endif // don't write original PDU rlc1.write_pdu(pdu_tv0.msg, pdu_tv0.N_bytes); rlc1.write_pdu(pdu_tv1.msg, pdu_tv1.N_bytes); rlc1.write_pdu(pdu_tv2.msg, pdu_tv2.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=0, FI=1, SN=222, LSF=0, SO=0, N_li=2 (3, 10)]")); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } int header_reconstruction_test6(srsran::log_sink_message_spy& spy) { // Original PDU: // 21:50:12.709646 [RLC_1] [I] DRB1 Tx PDU SN=509 (20 B) // 0000: 9d fd 80 40 0a b1 b1 b1 b1 b2 b2 b2 b2 b2 b2 b2 // 0010: b2 b2 b2 b3 // 21:50:12.709653 [RLC_1] [D] [Data PDU, RF=0, P=0, FI=1, SN=509, LSF=0, SO=0, N_li=2 (4, 10)]] // 21:50:12.711022 [RLC_1] [I] DRB1 Retx PDU segment SN=509 [so=0] (5 B) (attempt 3/16) // 0000: d9 fd 00 00 b1 // 21:50:12.711029 [RLC_2] [I] DRB1 Rx data PDU segment of SN=509 (1 B), SO=0, N_li=0 // 0000: b1 // 21:50:12.711034 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=509, LSF=0, SO=0, N_li=0] std::array tv0 = {0xd9, 0xfd, 0x00, 0x00, 0xb1}; // 21:50:12.711104 [RLC_1] [I] DRB1 Retx PDU segment SN=509 [so=1] (7 B) (attempt 3/16) // 0000: d1 fd 00 01 b1 b1 b1 // 21:50:12.711110 [RLC_2] [I] DRB1 Rx data PDU segment of SN=509 (3 B), SO=1, N_li=0 // 0000: b1 b1 b1 // 21:50:12.711115 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=509, LSF=0, SO=1, N_li=0] std::array tv1 = {0xd1, 0xfd, 0x00, 0x01, 0xb1, 0xb1, 0xb1}; // 21:50:12.711201 [RLC_1] [I] DRB1 Retx PDU segment SN=509 [so=4] (17 B) (attempt 3/16) // 0000: ed fd 80 04 00 a0 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 // 0010: b3 // 21:50:12.711210 [RLC_2] [I] DRB1 Rx data PDU segment of SN=509 (11 B), SO=4, N_li=1 // 0000: b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b3 // 21:50:12.711216 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=1, SN=509, LSF=1, SO=4, N_li=1 (10)] std::array tv2 = { 0xed, 0xfd, 0x80, 0x04, 0x00, 0xa0, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb3}; byte_buffer_t pdu_tv0; memcpy(pdu_tv0.msg, tv0.data(), tv0.size()); pdu_tv0.N_bytes = tv0.size(); byte_buffer_t pdu_tv1; memcpy(pdu_tv1.msg, tv1.data(), tv1.size()); pdu_tv1.N_bytes = tv1.size(); byte_buffer_t pdu_tv2; memcpy(pdu_tv2.msg, tv2.data(), tv2.size()); pdu_tv2.N_bytes = tv2.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test6.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); // configure RLC rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv0.msg, pdu_tv0.N_bytes); pcap.write_dl_ccch(pdu_tv1.msg, pdu_tv1.N_bytes); pcap.write_dl_ccch(pdu_tv2.msg, pdu_tv2.N_bytes); #endif // don't write original PDU rlc1.write_pdu(pdu_tv0.msg, pdu_tv0.N_bytes); rlc1.write_pdu(pdu_tv1.msg, pdu_tv1.N_bytes); rlc1.write_pdu(pdu_tv2.msg, pdu_tv2.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=1, FI=1, SN=509, LSF=0, SO=0, N_li=2 (4, 10)]")); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } int header_reconstruction_test7(srsran::log_sink_message_spy& spy) { // Original PDU: // 22:14:54.646530 [RLC_1] [I] DRB1 Tx PDU SN=282 (19 B) // 0000: 9d 1a 80 10 0a 28 29 29 29 29 29 29 29 29 29 29 // 0010: 2a 2a 2a // 22:14:54.646535 [RLC_1] [D] [Data PDU, RF=0, P=0, FI=1, SN=282, LSF=0, SO=0, N_li=2 (1, 10)] // 22:14:54.648484 [RLC_1] [I] DRB1 Retx PDU segment SN=282 [so=2] (6 B) (attempt 2/16) // 0000: f9 1a 00 02 29 29 // 22:14:54.648490 [RLC_2] [I] DRB1 Rx data PDU segment of SN=282 (2 B), SO=2, N_li=0 // 0000: 29 29 // 22:14:54.648495 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=1, SN=282, LSF=0, SO=2, N_li=0] std::array tv0 = {0xf9, 0x1a, 0x00, 0x02, 0x29, 0x29}; // 22:14:54.648576 [RLC_1] [I] DRB1 Retx PDU segment SN=282 [so=4] (11 B) (attempt 2/16) // 0000: d1 1a 00 04 29 29 29 29 29 29 29 // 22:14:54.648583 [RLC_2] [I] DRB1 Rx data PDU segment of SN=282 (7 B), SO=4, N_li=0 // 0000: 29 29 29 29 29 29 29 // 22:14:54.648588 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=282, LSF=0, SO=4, N_li=0] std::array tv1 = {0xd1, 0x1a, 0x00, 0x04, 0x29, 0x29, 0x29, 0x29, 0x29, 0x29, 0x29}; // 22:14:54.648701 [RLC_1] [I] DRB1 Retx PDU segment SN=282 [so=11] (7 B) (attempt 2/16) // 0000: d9 1a 80 0b 2a 2a 2a // 22:14:54.648707 [RLC_2] [I] DRB1 Rx data PDU segment of SN=282 (3 B), SO=11, N_li=0 // 0000: 2a 2a 2a // 22:14:54.648713 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=282, LSF=1, SO=11, N_li=0] std::array tv2 = {0xd9, 0x1a, 0x80, 0x0b, 0x2a, 0x2a, 0x2a}; // 22:14:54.648860 [RLC_1] [I] DRB1 Retx PDU segment SN=282 [so=0] (5 B) (attempt 3/16) // 0000: d1 1a 00 00 28 // 22:14:54.648866 [RLC_2] [I] DRB1 Rx data PDU segment of SN=282 (1 B), SO=0, N_li=0 // 0000: 28 // 22:14:54.648871 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=282, LSF=0, SO=0, N_li=0] std::array tv3 = {0xd1, 0x1a, 0x00, 0x00, 0x28}; // 22:14:54.648948 [RLC_1] [I] DRB1 Retx PDU segment SN=282 [so=1] (8 B) (attempt 3/16) // 0000: c9 1a 00 01 29 29 29 29 // 22:14:54.648957 [RLC_2] [I] DRB1 Rx data PDU segment of SN=282 (4 B), SO=1, N_li=0 // 0000: 29 29 29 29 // 22:14:54.648962 [RLC_2] [D] [Data PDU, RF=1, P=0, FI=1, SN=282, LSF=0, SO=1, N_li=0] std::array tv4 = {0xc9, 0x1a, 0x00, 0x01, 0x29, 0x29, 0x29, 0x29}; byte_buffer_t pdu_tv0; memcpy(pdu_tv0.msg, tv0.data(), tv0.size()); pdu_tv0.N_bytes = tv0.size(); byte_buffer_t pdu_tv1; memcpy(pdu_tv1.msg, tv1.data(), tv1.size()); pdu_tv1.N_bytes = tv1.size(); byte_buffer_t pdu_tv2; memcpy(pdu_tv2.msg, tv2.data(), tv2.size()); pdu_tv2.N_bytes = tv2.size(); byte_buffer_t pdu_tv3; memcpy(pdu_tv3.msg, tv3.data(), tv3.size()); pdu_tv3.N_bytes = tv3.size(); byte_buffer_t pdu_tv4; memcpy(pdu_tv4.msg, tv4.data(), tv4.size()); pdu_tv4.N_bytes = tv4.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test7.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); // configure RLC rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv0.msg, pdu_tv0.N_bytes); pcap.write_dl_ccch(pdu_tv1.msg, pdu_tv1.N_bytes); pcap.write_dl_ccch(pdu_tv2.msg, pdu_tv2.N_bytes); pcap.write_dl_ccch(pdu_tv3.msg, pdu_tv3.N_bytes); pcap.write_dl_ccch(pdu_tv4.msg, pdu_tv4.N_bytes); #endif // don't write original PDU rlc1.write_pdu(pdu_tv0.msg, pdu_tv0.N_bytes); rlc1.write_pdu(pdu_tv1.msg, pdu_tv1.N_bytes); rlc1.write_pdu(pdu_tv2.msg, pdu_tv2.N_bytes); rlc1.write_pdu(pdu_tv3.msg, pdu_tv3.N_bytes); rlc1.write_pdu(pdu_tv4.msg, pdu_tv4.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=0, FI=1, SN=282, LSF=0, SO=0, N_li=2 (1, 10)]")); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } int header_reconstruction_test8(srsran::log_sink_message_spy& spy) { // Original PDU: // 21:23:34.407718 [RLC_1] [I] DRB1 Tx PDU SN=423 (40 B) // 0000: b5 a7 80 38 0a 00 a0 77 77 77 78 78 78 78 78 78 // 0010: 78 78 78 78 79 79 79 79 79 79 79 79 79 79 7a 7a // 0020: 7a 7a 7a 7a 7a 7a 7a 7a // 21:23:34.407724 [RLC_1] [D] [Data PDU, RF=0, P=1, FI=1, SN=423, LSF=0, SO=0, N_li=3 (3, 10, 10)] // 21:23:34.408815 [RLC_1] [I] DRB1 Retx PDU segment SN=423 [so=0] (18 B) (attempt 2/8) // 0000: fd a7 00 00 00 30 77 77 77 78 78 78 78 78 78 78 // 0010: 78 78 // 21:23:34.408822 [RLC_2] [I] DRB1 Rx data PDU segment of SN=423 (12 B), SO=0, N_li=1 // 0000: 77 77 77 78 78 78 78 78 78 78 78 78 // 21:23:34.408828 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=1, SN=423, LSF=0, SO=0, N_li=1 (3)] std::array tv0 = { 0xfd, 0xa7, 0x00, 0x00, 0x00, 0x30, 0x77, 0x77, 0x77, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78}; // 21:23:34.408913 [RLC_1] [I] DRB1 Retx PDU segment SN=423 [so=12] (17 B) (attempt 2/8) // 0000: f5 a7 00 0c 00 10 78 79 79 79 79 79 79 79 79 79 // 0010: 79 // 21:23:34.408919 [RLC_2] [I] DRB1 Rx data PDU segment of SN=423 (11 B), SO=12, N_li=1 // 0000: 78 79 79 79 79 79 79 79 79 79 79 // 21:23:34.408925 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=1, SN=423, LSF=0, SO=12, N_li=1 (1)] std::array tv1 = { 0xf5, 0xa7, 0x00, 0x0c, 0x00, 0x10, 0x78, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79}; // 21:23:34.409421 [RLC_1] [I] DRB1 Retx PDU segment SN=423 [so=0] (19 B) (attempt 3/8) // 0000: f5 a7 00 00 00 30 77 77 77 78 78 78 78 78 78 78 // 0010: 78 78 78 // 21:23:34.409433 [RLC_2] [I] DRB1 Rx data PDU segment of SN=423 (13 B), SO=0, N_li=1 // 0000: 77 77 77 78 78 78 78 78 78 78 78 78 78 // 21:23:34.409440 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=1, SN=423, LSF=0, SO=0, N_li=1 (3)] std::array tv2 = { 0xf5, 0xa7, 0x00, 0x00, 0x00, 0x30, 0x77, 0x77, 0x77, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78}; // 21:23:34.409524 [RLC_1] [I] DRB1 Retx PDU segment SN=423 [so=13] (26 B) (attempt 3/8) // 0000: e5 a7 80 0d 00 a0 79 79 79 79 79 79 79 79 79 79 // 0010: 7a 7a 7a 7a 7a 7a 7a 7a 7a 7a // 21:23:34.409531 [RLC_2] [I] DRB1 Rx data PDU segment of SN=423 (20 B), SO=13, N_li=1 // 0000: 79 79 79 79 79 79 79 79 79 79 7a 7a 7a 7a 7a 7a // 0010: 7a 7a 7a 7a // 21:23:34.409537 [RLC_2] [D] [Data PDU, RF=1, P=1, FI=0, SN=423, LSF=1, SO=13, N_li=1 (10)] std::array tv3 = {0xe5, 0xa7, 0x80, 0x0d, 0x00, 0xa0, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x7a, 0x7a, 0x7a, 0x7a, 0x7a, 0x7a, 0x7a, 0x7a, 0x7a, 0x7a}; byte_buffer_t pdu_tv0; memcpy(pdu_tv0.msg, tv0.data(), tv0.size()); pdu_tv0.N_bytes = tv0.size(); byte_buffer_t pdu_tv1; memcpy(pdu_tv1.msg, tv1.data(), tv1.size()); pdu_tv1.N_bytes = tv1.size(); byte_buffer_t pdu_tv2; memcpy(pdu_tv2.msg, tv2.data(), tv2.size()); pdu_tv2.N_bytes = tv2.size(); byte_buffer_t pdu_tv3; memcpy(pdu_tv3.msg, tv3.data(), tv3.size()); pdu_tv3.N_bytes = tv3.size(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_header_reconstruction_test8.pcap", rlc_config_t::default_rlc_am_config()); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); // configure RLC rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } #if HAVE_PCAP pcap.write_dl_ccch(pdu_tv0.msg, pdu_tv0.N_bytes); pcap.write_dl_ccch(pdu_tv1.msg, pdu_tv1.N_bytes); pcap.write_dl_ccch(pdu_tv2.msg, pdu_tv2.N_bytes); pcap.write_dl_ccch(pdu_tv3.msg, pdu_tv3.N_bytes); pcap.close(); #endif // don't write original PDU rlc1.write_pdu(pdu_tv0.msg, pdu_tv0.N_bytes); rlc1.write_pdu(pdu_tv1.msg, pdu_tv1.N_bytes); rlc1.write_pdu(pdu_tv2.msg, pdu_tv2.N_bytes); rlc1.write_pdu(pdu_tv3.msg, pdu_tv3.N_bytes); // Check RLC re-assembled message header TESTASSERT(spy.has_message("[Data PDU, RF=0, P=1, FI=1, SN=423, LSF=0, SO=0, N_li=3 (3, 10, 10)]")); return SRSRAN_SUCCESS; } bool reset_test() { rlc_am_tester tester; srsran::timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 1 SDU of size 10 into RLC1 unique_byte_buffer_t sdu_buf = srsran::make_byte_buffer(); sdu_buf->N_bytes = 100; std::fill(sdu_buf->msg, sdu_buf->msg + sdu_buf->N_bytes, 0); sdu_buf->msg[0] = 1; // Write the index into the buffer rlc1.write_sdu(std::move(sdu_buf)); // read 1 PDU from RLC1 and force segmentation byte_buffer_t pdu_bufs; len = rlc1.read_pdu(pdu_bufs.msg, 4); pdu_bufs.N_bytes = len; // reset RLC1 rlc1.stop(); // read another PDU segment from RLC1 len = rlc1.read_pdu(pdu_bufs.msg, 4); pdu_bufs.N_bytes = len; // now empty RLC buffer len = rlc1.read_pdu(pdu_bufs.msg, 100); pdu_bufs.N_bytes = len; if (0 != rlc1.get_buffer_state()) { return -1; } return 0; } bool resume_test() { rlc_am_tester tester; srsran::timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 1 SDU of size 10 into RLC1 unique_byte_buffer_t sdu_buf = srsran::make_byte_buffer(); sdu_buf->N_bytes = 100; std::fill(sdu_buf->msg, sdu_buf->msg + sdu_buf->N_bytes, 0); sdu_buf->msg[0] = 1; // Write the index into the buffer rlc1.write_sdu(std::move(sdu_buf)); // read 1 PDU from RLC1 and force segmentation byte_buffer_t pdu_bufs; len = rlc1.read_pdu(pdu_bufs.msg, 4); pdu_bufs.N_bytes = len; // reestablish RLC1 rlc1.reestablish(); // resume RLC1 rlc1.resume(); // Buffer should be zero if (0 != rlc1.get_buffer_state()) { return -1; } // Do basic test byte_buffer_t pdu_bufs_tx[NBUFS]; basic_test_tx(&rlc1, pdu_bufs_tx); return 0; } bool stop_test() { rlc_am_tester tester; srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // start thread reading ul_writer writer(&rlc1); writer.start(-2); // let writer thread block on tx_queue usleep(1e6); // stop RLC1 rlc1.stop(); return 0; } // This test checks if status PDUs are generated even though the grant size may not // be enough to fit all SNs that would need to be NACKed bool status_pdu_test() { rlc_am_tester tester; srsran::timer_handler timers(8); int len = 0; rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); if (not rlc1.configure(rlc_config_t::default_rlc_am_config())) { return -1; } if (not rlc2.configure(rlc_config_t::default_rlc_am_config())) { return -1; } // Push 5 SDUs into RLC1 const uint32_t n_sdus = 10; unique_byte_buffer_t sdu_bufs[n_sdus]; for (uint32_t i = 0; i < n_sdus; i++) { sdu_bufs[i] = srsran::make_byte_buffer(); sdu_bufs[i]->N_bytes = 1; // Give each buffer a size of 1 byte sdu_bufs[i]->msg[0] = i; // Write the index into the buffer rlc1.write_sdu(std::move(sdu_bufs[i])); } // Read 5 PDUs from RLC1 (1 byte each) const uint32_t n_pdus = n_sdus; byte_buffer_t pdu_bufs[n_pdus]; for (uint32_t i = 0; i < n_pdus; i++) { len = rlc1.read_pdu(pdu_bufs[i].msg, 3); // 2 byte header + 1 byte payload pdu_bufs[i].N_bytes = len; } TESTASSERT(0 == rlc1.get_buffer_state()); // Only pass 2nd and last PDUs to RLC2 for (uint32_t i = 0; i < n_pdus; ++i) { if (i == 0 || i == 2 || i == n_pdus - 1) { rlc2.write_pdu(pdu_bufs[i].msg, pdu_bufs[i].N_bytes); } } // Step timers until reordering timeout expires int cnt = 5; while (cnt--) { timers.step_all(); } uint32_t buffer_state = rlc2.get_buffer_state(); // Read status PDU from RLC2 byte_buffer_t status_buf; len = rlc2.read_pdu(status_buf.msg, 5); // provide only small grant status_buf.N_bytes = len; // check status PDU doesn't contain ACK_SN in NACK list rlc_status_pdu_t status_pdu = {}; rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_pdu); TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu)); // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // Read the retx PDU from RLC1 byte_buffer_t retx; len = rlc1.read_pdu(retx.msg, 10); retx.N_bytes = len; // Write the retx PDU to RLC2 rlc2.write_pdu(retx.msg, retx.N_bytes); // Step timers until reordering timeout expires cnt = 5; while (cnt--) { timers.step_all(); } // get buffer state and status PDU again status_buf.clear(); len = rlc2.read_pdu(status_buf.msg, 20); // big enough grant to fit full status PDU status_buf.N_bytes = len; TESTASSERT(status_buf.N_bytes != 0); // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); // retransmission of remaining PDUs for (int i = 0; i < 10; i++) { retx.clear(); len = rlc1.read_pdu(retx.msg, 3); retx.N_bytes = len; // Write the retx PDU to RLC2 rlc2.write_pdu(retx.msg, retx.N_bytes); } TESTASSERT(tester.sdus.size() == n_sdus); for (uint32_t i = 0; i < tester.sdus.size(); i++) { TESTASSERT(tester.sdus[i]->N_bytes == 1); } return SRSRAN_SUCCESS; } // This test checks the correct functioning of RLC reestablishment // after maxRetx attempt. bool reestablish_test() { const rlc_config_t config = rlc_config_t::default_rlc_am_config(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_reestablish_test.pcap", config); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); srslog::fetch_basic_logger("RLC_AM_1").set_hex_dump_max_size(100); srslog::fetch_basic_logger("RLC_AM_2").set_hex_dump_max_size(100); srslog::fetch_basic_logger("RLC").set_hex_dump_max_size(100); if (not rlc1.configure(config)) { return -1; } if (not rlc2.configure(config)) { return -1; } bool reetablished_once = false; // Generate 40 SDUs/PDUs const uint32_t total_num_tx_pdus = config.am.max_retx_thresh * 10; uint32_t num_tx_pdus = 0; // Create a few SDUs and write to RLC1 to make sure buffers aren't empty after tx one PDU for (uint32_t i = num_tx_pdus; i < 5; ++i) { // Write SDU unique_byte_buffer_t sdu = srsran::make_byte_buffer(); TESTASSERT(sdu != nullptr); sdu->N_bytes = 5; // Give each buffer a size of 1 byte for (uint32_t k = 0; k < sdu->N_bytes; ++k) { sdu->msg[k] = i; // Write the index into the buffer } sdu->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu)); } for (uint32_t i = num_tx_pdus; i < total_num_tx_pdus; i++) { // Write SDU unique_byte_buffer_t sdu = srsran::make_byte_buffer(); TESTASSERT(sdu != nullptr); sdu->N_bytes = 5; // Give each buffer a size of 1 byte for (uint32_t k = 0; k < sdu->N_bytes; ++k) { sdu->msg[k] = i; // Write the index into the buffer } sdu->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu)); // Read PDU unique_byte_buffer_t pdu = srsran::make_byte_buffer(); pdu->N_bytes = rlc1.read_pdu(pdu->msg, 7); // 2 byte header + 5 byte payload; // Find SN=0 PDU bool is_data_pdu_sn0 = false; if (not rlc_am_is_control_pdu(pdu->msg)) { // After reestablishment after maxretx, also SN=0 is delivered if (not reetablished_once) { rlc_amd_pdu_header_t header = {}; rlc_am_read_data_pdu_header(pdu.get(), &header); if (header.sn == 0) { is_data_pdu_sn0 = true; } } } // Deliver all PDUs but SN=0 to RLC2 if (not is_data_pdu_sn0) { rlc2.write_pdu(pdu->msg, pdu->N_bytes); #if HAVE_PCAP pcap.write_dl_ccch(pdu->msg, pdu->N_bytes); #endif } // Check if RLC2 has something to send if (rlc2.get_buffer_state() > 0) { byte_buffer_t status_buf; status_buf.N_bytes = rlc2.read_pdu(status_buf.msg, 5); // provide only small grant TESTASSERT(status_buf.N_bytes != 0); // Write status PDU to RLC1 rlc1.write_pdu(status_buf.msg, status_buf.N_bytes); #if HAVE_PCAP pcap.write_ul_ccch(status_buf.msg, status_buf.N_bytes); #endif } // each interation is one TTI timers.step_all(); // Reestablish if max retx have been reached if (tester.max_retx_triggered and !reetablished_once) { rlc1.reestablish(); rlc2.reestablish(); // make sure we only reesablish once reetablished_once = true; } } TESTASSERT(tester.sdus.size() == 17); srslog::fetch_basic_logger("TEST").info("Received %zd SDUs", tester.sdus.size()); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } // This test checks the correct functioning of RLC discard functionality bool discard_test() { const rlc_config_t config = rlc_config_t::default_rlc_am_config(); #if HAVE_PCAP rlc_pcap pcap; pcap.open("rlc_am_reestablish_test.pcap", config); rlc_am_tester tester(&pcap); #else rlc_am_tester tester(NULL); #endif srsran::timer_handler timers(8); rlc_am_lte rlc1(srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers); rlc_am_lte rlc2(srslog::fetch_basic_logger("RLC_AM_2"), 1, &tester, &tester, &timers); srslog::fetch_basic_logger("RLC_AM_1").set_hex_dump_max_size(100); srslog::fetch_basic_logger("RLC_AM_2").set_hex_dump_max_size(100); srslog::fetch_basic_logger("RLC").set_hex_dump_max_size(100); if (not rlc1.configure(config)) { return -1; } if (not rlc2.configure(config)) { return -1; } // Check has_data() after a SDU discard { uint32_t num_tx_pdus = 1; for (uint32_t i = 0; i < num_tx_pdus; ++i) { // Write SDU unique_byte_buffer_t sdu = srsran::make_byte_buffer(); TESTASSERT(sdu != nullptr); sdu->N_bytes = 5; for (uint32_t k = 0; k < sdu->N_bytes; ++k) { sdu->msg[k] = i; // Write the index into the buffer } sdu->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu)); } } rlc1.discard_sdu(0); // Try to discard PDCP_SN=1 TESTASSERT(rlc1.has_data() == false); // Discard an SDU in the midle of the queue and read PDUs after { uint32_t num_tx_pdus = 10; for (uint32_t i = 0; i < num_tx_pdus; ++i) { // Write SDU unique_byte_buffer_t sdu = srsran::make_byte_buffer(); TESTASSERT(sdu != nullptr); sdu->N_bytes = 1; for (uint32_t k = 0; k < sdu->N_bytes; ++k) { sdu->msg[k] = i; // Write the index into the buffer } sdu->md.pdcp_sn = i; rlc1.write_sdu(std::move(sdu)); } } rlc1.discard_sdu(3); // Try to discard PDCP_SN=1 TESTASSERT(rlc1.has_data() == true); TESTASSERT(rlc1.get_buffer_state() == 23); // 2 bytes fixed header, 12 , 9 bytes of data, unique_byte_buffer_t pdu = srsran::make_byte_buffer(); uint32_t len = rlc1.read_pdu(pdu->msg, 50); // enough for all PDUs pdu->N_bytes = len; TESTASSERT(23 == len); srslog::fetch_basic_logger("TEST").info("Received %zd SDUs", tester.sdus.size()); #if HAVE_PCAP pcap.close(); #endif return SRSRAN_SUCCESS; } int main(int argc, char** argv) { // Setup the log message spy to intercept error and warning log entries from RLC if (!srslog::install_custom_sink(srsran::log_sink_message_spy::name(), std::unique_ptr( new srsran::log_sink_message_spy(srslog::get_default_log_formatter())))) { return SRSRAN_ERROR; } auto* spy = static_cast(srslog::find_sink(srsran::log_sink_message_spy::name())); if (!spy) { return SRSRAN_ERROR; } srslog::set_default_sink(*spy); auto& logger_rrc1 = srslog::fetch_basic_logger("RLC_AM_1", *spy, false); auto& logger_rrc2 = srslog::fetch_basic_logger("RLC_AM_2", *spy, false); logger_rrc1.set_hex_dump_max_size(100); logger_rrc2.set_hex_dump_max_size(100); logger_rrc1.set_level(srslog::basic_levels::debug); logger_rrc2.set_level(srslog::basic_levels::debug); // start log backend srslog::init(); if (basic_test()) { printf("basic_test failed\n"); exit(-1); }; if (concat_test()) { printf("concat_test failed\n"); exit(-1); }; if (segment_test(true)) { printf("segment_test with in-order PDU reception failed\n"); exit(-1); }; if (segment_test(false)) { printf("segment_test with out-of-order PDU reception failed\n"); exit(-1); }; if (retx_test()) { printf("retx_test failed\n"); exit(-1); }; if (max_retx_test()) { printf("max_retx_test failed\n"); exit(-1); }; if (reestablish_test()) { printf("reestablish_test failed\n"); exit(-1); }; if (segment_retx_test()) { printf("segment_retx_test failed\n"); exit(-1); }; if (resegment_test_1()) { printf("resegment_test_1 failed\n"); exit(-1); }; if (resegment_test_2()) { printf("resegment_test_2 failed\n"); exit(-1); }; if (resegment_test_3()) { printf("resegment_test_3 failed\n"); exit(-1); }; if (resegment_test_4()) { printf("resegment_test_4 failed\n"); exit(-1); }; if (resegment_test_5()) { printf("resegment_test_5 failed\n"); exit(-1); }; if (resegment_test_6()) { printf("resegment_test_6 failed\n"); exit(-1); }; logger_rrc1.set_hex_dump_max_size(100); logger_rrc2.set_hex_dump_max_size(100); if (resegment_test_7()) { printf("resegment_test_7 failed\n"); exit(-1); } if (resegment_test_8()) { printf("resegment_test_8 failed\n"); exit(-1); }; logger_rrc1.set_hex_dump_max_size(-1); logger_rrc2.set_hex_dump_max_size(-1); if (resegment_test_9()) { printf("resegment_test_9 failed\n"); exit(-1); }; if (resegment_test_10()) { printf("resegment_test_10 failed\n"); exit(-1); }; if (resegment_test_11()) { printf("resegment_test_11 failed\n"); exit(-1); }; if (resegment_test_12()) { printf("resegment_test_12 failed\n"); exit(-1); }; // Set of unique header reconstruction tests using the logspy if (header_reconstruction_test(*spy)) { printf("header_reconstruction_test failed\n"); exit(-1); } if (header_reconstruction_test2(*spy)) { printf("header_reconstruction_test2 failed\n"); exit(-1); } if (header_reconstruction_test3(*spy)) { printf("header_reconstruction_test3 failed\n"); exit(-1); } if (header_reconstruction_test4(*spy)) { printf("header_reconstruction_test4 failed\n"); exit(-1); } if (header_reconstruction_test5(*spy)) { printf("header_reconstruction_test5 failed\n"); exit(-1); } if (header_reconstruction_test6(*spy)) { printf("header_reconstruction_test6 failed\n"); exit(-1); } if (header_reconstruction_test7(*spy)) { printf("header_reconstruction_test7 failed\n"); exit(-1); } if (header_reconstruction_test8(*spy)) { printf("header_reconstruction_test8 failed\n"); exit(-1); } if (reset_test()) { printf("reset_test failed\n"); exit(-1); }; if (stop_test()) { printf("stop_test failed\n"); exit(-1); }; if (resume_test()) { printf("resume_test failed\n"); exit(-1); }; if (status_pdu_test()) { printf("status_pdu_test failed\n"); exit(-1); }; if (discard_test()) { printf("discard_test failed\n"); exit(-1); }; return SRSRAN_SUCCESS; }