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rlc, nr: add discard_test for AM

This commit is contained in:
Robert Falkenberg 2022-02-22 14:28:36 +01:00
parent 42a8e957d4
commit 8f6e3996d3
1 changed files with 103 additions and 0 deletions
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103
lib/test/rlc/rlc_am_nr_test.cc
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@ -883,6 +883,108 @@ int retx_segment_test()
return SRSRAN_SUCCESS;
}
// This test checks the correct functioning of RLC discard functionality
int discard_test()
{
rlc_am_tester tester;
timer_handler timers(8);
auto& test_logger = srslog::fetch_basic_logger("TESTER ");
rlc_am rlc1(srsran_rat_t::nr, srslog::fetch_basic_logger("RLC_AM_1"), 1, &tester, &tester, &timers);
rlc_am rlc2(srsran_rat_t::nr, 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(rlc_config_t::default_rlc_am_nr_config())) {
return SRSRAN_ERROR;
}
if (not rlc2.configure(rlc_config_t::default_rlc_am_nr_config())) {
return SRSRAN_ERROR;
}
// Test discarding the single SDU from the queue
{
uint32_t num_tx_sdus = 1;
for (uint32_t i = 0; i < num_tx_sdus; ++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=0
TESTASSERT(rlc1.has_data() == false);
// Test discarding two SDUs in the middle (SN=3) and end (SN=9) of the queue and read PDUs after
{
uint32_t num_tx_sdus = 10;
for (uint32_t i = 0; i < num_tx_sdus; ++i) {
// Write SDU
unique_byte_buffer_t sdu = srsran::make_byte_buffer();
TESTASSERT(sdu != nullptr);
sdu->N_bytes = 7;
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));
}
}
TESTASSERT(rlc1.get_buffer_state() == 90); // 10 * (2B Header + 7B Payload)
rlc1.discard_sdu(3); // Try to discard PDCP_SN=3
TESTASSERT(rlc1.has_data() == true);
TESTASSERT(rlc1.get_buffer_state() == 81);
rlc1.discard_sdu(9); // Try to discard PDCP_SN=9
TESTASSERT(rlc1.has_data() == true);
TESTASSERT(rlc1.get_buffer_state() == 72);
{
uint32_t num_tx_sdus = 8;
for (uint32_t i = 0; i < num_tx_sdus; ++i) {
unique_byte_buffer_t pdu = srsran::make_byte_buffer();
uint32_t len = rlc1.read_pdu(pdu->msg, 50); // sufficient space to read without segmentation
pdu->N_bytes = len;
TESTASSERT((2 + 7) == len);
// Check that we don't have any SN gaps
rlc_am_nr_pdu_header_t header = {};
rlc_am_nr_read_data_pdu_header(pdu.get(), rlc_am_nr_sn_size_t::size12bits, &header);
TESTASSERT(header.sn == i);
}
}
TESTASSERT(rlc1.has_data() == false);
srslog::fetch_basic_logger("TEST").info("Received %zd SDUs", tester.sdus.size());
// Test discarding non-existing SDU from the queue
{
uint32_t num_tx_sdus = 3;
for (uint32_t i = 0; i < num_tx_sdus; ++i) {
// Write SDU
unique_byte_buffer_t sdu = srsran::make_byte_buffer();
TESTASSERT(sdu != nullptr);
sdu->N_bytes = 7;
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));
}
}
TESTASSERT(rlc1.get_buffer_state() == 27); // 3 * (2B Header + 7B Payload)
rlc1.discard_sdu(8); // Try to discard PDCP_SN=8, which doesn't exist
TESTASSERT(rlc1.get_buffer_state() == 27); // 3 * (2B Header + 7B Payload)
return SRSRAN_SUCCESS;
}
int main()
{
// Setup the log message spy to intercept error and warning log entries from RLC
@ -914,5 +1016,6 @@ int main()
TESTASSERT(basic_segmentation_test() == SRSRAN_SUCCESS);
TESTASSERT(segment_retx_test() == SRSRAN_SUCCESS);
TESTASSERT(retx_segment_test() == SRSRAN_SUCCESS);
TESTASSERT(discard_test() == SRSRAN_SUCCESS);
return SRSRAN_SUCCESS;
}