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srsLTE
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srsLTE/lib/test/upper/pdcp_nr_test_rx.cc

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/*
* Copyright 2013-2020 Software Radio Systems Limited
*
* This file is part of srsLTE.
*
* srsLTE is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* srsLTE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* A copy of the GNU Affero General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
#include "pdcp_nr_test.h"
#include <numeric>
/*
* Genric function to test reception of in-sequence packets
*/
int test_rx(std::vector<pdcp_test_event_t> events,
const pdcp_initial_state& init_state,
uint8_t pdcp_sn_len,
uint32_t n_sdus_exp,
const srslte::unique_byte_buffer_t& sdu_exp,
srslte::byte_buffer_pool* pool,
srslte::log_ref log)
{
srslte::pdcp_config_t cfg_rx = {1,
srslte::PDCP_RB_IS_DRB,
srslte::SECURITY_DIRECTION_DOWNLINK,
srslte::SECURITY_DIRECTION_UPLINK,
pdcp_sn_len,
srslte::pdcp_t_reordering_t::ms500,
srslte::pdcp_discard_timer_t::infinity};
pdcp_nr_test_helper pdcp_hlp_rx(cfg_rx, sec_cfg, log);
srslte::pdcp_entity_nr* pdcp_rx = &pdcp_hlp_rx.pdcp;
gw_dummy* gw_rx = &pdcp_hlp_rx.gw;
srslte::timer_handler* timers_rx = &pdcp_hlp_rx.stack.timers;
pdcp_hlp_rx.set_pdcp_initial_state(init_state);
// Generate test message and encript/decript SDU.
for (pdcp_test_event_t& event : events) {
// Decript and integrity check the PDU
pdcp_rx->write_pdu(std::move(event.pkt));
for (uint32_t i = 0; i < event.ticks; ++i) {
timers_rx->step_all();
}
}
// Test if the number of RX packets
TESTASSERT(gw_rx->rx_count == n_sdus_exp);
srslte::unique_byte_buffer_t sdu_act = allocate_unique_buffer(*pool);
gw_rx->get_last_pdu(sdu_act);
TESTASSERT(compare_two_packets(sdu_exp, sdu_act) == 0);
return 0;
}
/*
* RX Test: PDCP Entity with SN LEN = 12 and 18.
* PDCP entity configured with EIA2 and EEA2
*/
int test_rx_all(srslte::byte_buffer_pool* pool, srslte::log_ref log)
{
// Test SDUs
srslte::unique_byte_buffer_t tst_sdu1 = allocate_unique_buffer(*pool); // SDU 1
tst_sdu1->append_bytes(sdu1, sizeof(sdu1));
srslte::unique_byte_buffer_t tst_sdu2 = allocate_unique_buffer(*pool); // SDU 2
tst_sdu2->append_bytes(sdu2, sizeof(sdu2));
/*
* RX Test 1: PDCP Entity with SN LEN = 12
* Test in-sequence reception of 4097 packets.
* This tests correct handling of HFN in the case of SN wraparound (SN LEN 12)
*/
{
std::vector<uint32_t> test1_counts(2); // Test two packets
std::iota(test1_counts.begin(), test1_counts.end(), 4095); // Starting at COUNT 4095
std::vector<pdcp_test_event_t> test1_pdus =
gen_expected_pdus_vector(tst_sdu1, test1_counts, srslte::PDCP_SN_LEN_12, sec_cfg, pool, log);
pdcp_initial_state test1_init_state = {.tx_next = 4095, .rx_next = 4095, .rx_deliv = 4095, .rx_reord = 0};
TESTASSERT(test_rx(std::move(test1_pdus), test1_init_state, srslte::PDCP_SN_LEN_12, 2, tst_sdu1, pool, log) == 0);
}
/*
* RX Test 2: PDCP Entity with SN LEN = 12
* Test in-sequence reception of 4294967297 packets.
* This tests correct handling of COUNT in the case of [HFN|SN] wraparound
* Packet that wraparound should be dropped, so only one packet should be received at the GW.
*/
{
std::vector<uint32_t> test2_counts(2); // Test two packets
std::iota(test2_counts.begin(), test2_counts.end(), 4294967295); // Starting at COUNT 4294967295
std::vector<pdcp_test_event_t> test2_pdus =
gen_expected_pdus_vector(tst_sdu1, test2_counts, srslte::PDCP_SN_LEN_12, sec_cfg, pool, log);
pdcp_initial_state test2_init_state = {
.tx_next = 4294967295, .rx_next = 4294967295, .rx_deliv = 4294967295, .rx_reord = 0};
TESTASSERT(test_rx(std::move(test2_pdus), test2_init_state, srslte::PDCP_SN_LEN_12, 1, tst_sdu1, pool, log) == 0);
}
/*
* RX Test 3: PDCP Entity with SN LEN = 18
* Test In-sequence reception of 262145 packets.
* This tests correct handling of HFN in the case of SN wraparound (SN LEN 18)
*/
{
std::vector<uint32_t> test3_counts(2); // Test two packets
std::iota(test3_counts.begin(), test3_counts.end(), 262144); // Starting at COUNT 262144
std::vector<pdcp_test_event_t> test3_pdus =
gen_expected_pdus_vector(tst_sdu1, test3_counts, srslte::PDCP_SN_LEN_18, sec_cfg, pool, log);
pdcp_initial_state test3_init_state = {.tx_next = 262144, .rx_next = 262144, .rx_deliv = 262144, .rx_reord = 0};
TESTASSERT(test_rx(std::move(test3_pdus), test3_init_state, srslte::PDCP_SN_LEN_18, 2, tst_sdu1, pool, log) == 0);
}
/*
* RX Test 4: PDCP Entity with SN LEN = 18
* Test in-sequence reception of 4294967297 packets.
* This tests correct handling of COUNT in the case of [HFN|SN] wraparound
*/
{
std::vector<uint32_t> test4_counts(2); // Test two packets
std::iota(test4_counts.begin(), test4_counts.end(), 4294967295); // Starting at COUNT 4294967295
std::vector<pdcp_test_event_t> test4_pdus =
gen_expected_pdus_vector(tst_sdu1, test4_counts, srslte::PDCP_SN_LEN_18, sec_cfg, pool, log);
pdcp_initial_state test4_init_state = {
.tx_next = 4294967295, .rx_next = 4294967295, .rx_deliv = 4294967295, .rx_reord = 0};
TESTASSERT(test_rx(std::move(test4_pdus), test4_init_state, srslte::PDCP_SN_LEN_18, 1, tst_sdu1, pool, log) == 0);
}
/*
* RX Test 5: PDCP Entity with SN LEN = 12
* Test reception of two out-of-order packets, starting at COUNT 0.
*/
{
std::vector<pdcp_test_event_t> test5_pdus;
pdcp_initial_state test5_init_state = {};
// First PDU
pdcp_test_event_t event_pdu1;
event_pdu1.pkt = srslte::allocate_unique_buffer(*pool);
event_pdu1.pkt->append_bytes(pdu1_count0_snlen12, sizeof(pdu1_count0_snlen12));
// Second PDU
pdcp_test_event_t event_pdu2;
event_pdu2.pkt = srslte::allocate_unique_buffer(*pool);
event_pdu2.pkt->append_bytes(pdu2_count1_snlen12, sizeof(pdu2_count1_snlen12));
// Write PDUs out of order (first the pdu with COUNT 1 and COUNT 0 after)
test5_pdus.push_back(std::move(event_pdu2));
test5_pdus.push_back(std::move(event_pdu1));
TESTASSERT(test_rx(std::move(test5_pdus), test5_init_state, srslte::PDCP_SN_LEN_12, 2, tst_sdu2, pool, log) == 0);
}
/*
* RX Test 6: PDCP Entity with SN LEN = 18
* Test reception of two out-of-order packets, starting at COUNT 0.
*/
{
std::vector<pdcp_test_event_t> test6_pdus;
pdcp_initial_state test6_init_state = {};
// First PDU
pdcp_test_event_t event_pdu1;
event_pdu1.pkt = srslte::allocate_unique_buffer(*pool);
event_pdu1.pkt->append_bytes(pdu1_count0_snlen18, sizeof(pdu1_count0_snlen18));
// Second PDU
pdcp_test_event_t event_pdu2;
event_pdu2.pkt = srslte::allocate_unique_buffer(*pool);
event_pdu2.pkt->append_bytes(pdu2_count1_snlen18, sizeof(pdu2_count1_snlen18));
// Write PDUs out of order (first the pdu with COUNT 1 and COUNT 0 after)
test6_pdus.push_back(std::move(event_pdu2));
test6_pdus.push_back(std::move(event_pdu1));
TESTASSERT(test_rx(std::move(test6_pdus), test6_init_state, srslte::PDCP_SN_LEN_18, 2, tst_sdu2, pool, log) == 0);
}
/*
* RX Test 7: PDCP Entity with SN LEN = 12
* Test Reception of one out-of-order packet.
*/
{
std::vector<pdcp_test_event_t> test7_pdus;
pdcp_initial_state test7_init_state = {};
// First PDU
pdcp_test_event_t event_pdu1;
event_pdu1.pkt = srslte::allocate_unique_buffer(*pool);
event_pdu1.pkt->append_bytes(pdu2_count1_snlen12, sizeof(pdu2_count1_snlen12));
event_pdu1.ticks = 500;
// Write PDUs out of order (first the pdu with COUNT 1 and COUNT 0 after)
test7_pdus.push_back(std::move(event_pdu1));
TESTASSERT(test_rx(std::move(test7_pdus), test7_init_state, srslte::PDCP_SN_LEN_12, 1, tst_sdu2, pool, log) == 0);
}
/*
* RX Test 8: PDCP Entity with SN LEN = 12
* Test reception of two duplicate PDUs, with COUNT 0.
*/
{
std::vector<pdcp_test_event_t> test8_pdus;
pdcp_initial_state test8_init_state = {};
// First PDU
pdcp_test_event_t event_pdu1;
event_pdu1.pkt = srslte::allocate_unique_buffer(*pool);
event_pdu1.pkt->append_bytes(pdu1_count0_snlen12, sizeof(pdu1_count0_snlen12));
// Second PDU
pdcp_test_event_t event_pdu2;
event_pdu2.pkt = srslte::allocate_unique_buffer(*pool);
event_pdu2.pkt->append_bytes(pdu1_count0_snlen12, sizeof(pdu1_count0_snlen12));
// Write PDUs out of order (first the pdu with COUNT 1 and COUNT 0 after)
test8_pdus.push_back(std::move(event_pdu1));
test8_pdus.push_back(std::move(event_pdu2));
TESTASSERT(test_rx(std::move(test8_pdus), test8_init_state, srslte::PDCP_SN_LEN_12, 1, tst_sdu1, pool, log) == 0);
}
return 0;
}
// Setup all tests
int run_all_tests(srslte::byte_buffer_pool* pool)
{
// Setup log
srslte::log_ref log("PDCP NR Test RX");
log->set_level(srslte::LOG_LEVEL_DEBUG);
log->set_hex_limit(128);
TESTASSERT(test_rx_all(pool, log) == 0);
return 0;
}
int main()
{
if (run_all_tests(srslte::byte_buffer_pool::get_instance()) != SRSLTE_SUCCESS) {
fprintf(stderr, "pdcp_nr_tests_rx() failed\n");
return SRSLTE_ERROR;
}
srslte::byte_buffer_pool::cleanup();
return SRSLTE_SUCCESS;
}
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