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rlc_am_test: add testcase for processing out-of-order status PDUs

This commit is contained in:
Andre Puschmann 2021-06-11 12:29:06 +02:00
parent 19f30aa652
commit fa7a8fb687
1 changed files with 85 additions and 0 deletions
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85
lib/test/upper/rlc_am_test.cc
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@ -3359,6 +3359,86 @@ bool incorrect_status_pdu_test()
rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
TESTASSERT(tester.protocol_failure_triggered == true);
return SRSRAN_SUCCESS;
}
/// The test checks the correct detection of an out-of-order status PDUs
/// In contrast to the without explicitly NACK-ing specific SNs
bool incorrect_status_pdu_test2()
{
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;
}
// 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());
// Construct a status PDU that ACKs all SNs
rlc_status_pdu_t status_pdu = {};
status_pdu.ack_sn = 5;
status_pdu.N_nack = 0;
TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu));
// pack PDU and write to RLC
byte_buffer_t status_buf;
rlc_am_write_status_pdu(&status_pdu, &status_buf);
rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
TESTASSERT(tester.protocol_failure_triggered == false);
// construct a valid but conflicting status PDU that acks a lower SN and requests SN=1 for retx
status_pdu.ack_sn = 3;
status_pdu.N_nack = 1;
status_pdu.nacks[0].nack_sn = 1;
TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu));
// pack and write to RLC again
rlc_am_write_status_pdu(&status_pdu, &status_buf);
rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
// the PDU should be dropped
// resend first Status PDU again
status_pdu.ack_sn = 5;
status_pdu.N_nack = 0;
TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu));
// pack and write to RLC again
rlc_am_write_status_pdu(&status_pdu, &status_buf);
rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
// now ack all
status_pdu.ack_sn = n_pdus;
status_pdu.N_nack = 0;
TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu));
// pack and write to RLC again
rlc_am_write_status_pdu(&status_pdu, &status_buf);
rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
return SRSRAN_SUCCESS;
}
@ -3758,6 +3838,11 @@ int main(int argc, char** argv)
exit(-1);
};
if (incorrect_status_pdu_test2()) {
printf("incorrect_status_pdu_test2 failed\n");
exit(-1);
};
if (discard_test()) {
printf("discard_test failed\n");
exit(-1);