mirror of https://github.com/PentHertz/srsLTE.git
rlc_am_test: add unit test for ACK_SN is outside rx window
the test uses a malformed status PDU from a PCAP and makes sure the RLC receiver detects such a PDU and raises a warning
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@ -79,6 +79,45 @@ int malformed_status_pdu_test()
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return SRSRAN_SUCCESS;
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}
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// Malformed PDU captured in field-test
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// 22:48:03.509077 [RLC ] [I] DRB1 Tx status PDU - ACK_SN = 205, N_nack = 98, NACK_SN =
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// [752][986][109][110][111][112][113][114][115][116][117][118][119][120][121][122][123][124][125][126][127][128][129]
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int malformed_status_pdu_test2()
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{
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uint32_t vr_a = 293;
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// Construct a status PDU that ACKs SN 205, which is outside the rx window
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srsran::rlc_status_pdu_t status_pdu = {};
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status_pdu.ack_sn = 205;
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status_pdu.N_nack = 2;
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status_pdu.nacks[0].nack_sn = 752;
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status_pdu.nacks[1].nack_sn = 986;
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TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu, vr_a) == false);
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// 1 SN after upper edge of Rx window will fail
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status_pdu.ack_sn = 806;
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TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu, vr_a) == false);
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// The exact upper edge of Rx window should work
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status_pdu.ack_sn = 805;
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status_pdu.N_nack = 0;
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TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu, vr_a) == true);
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// ACK_SN is again outside of rx_window
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vr_a = 0;
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status_pdu.ack_sn = 742;
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status_pdu.N_nack = 0;
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TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu, vr_a) == false);
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// ACK_SN is well within rx window
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vr_a = 300;
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status_pdu.ack_sn = 742;
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status_pdu.N_nack = 0;
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TESTASSERT(rlc_am_is_valid_status_pdu(status_pdu, vr_a) == true);
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return SRSRAN_SUCCESS;
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}
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int main(int argc, char** argv)
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{
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srslog::init();
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@ -86,6 +125,7 @@ int main(int argc, char** argv)
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TESTASSERT(simple_status_pdu_test1() == SRSRAN_SUCCESS);
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TESTASSERT(status_pdu_with_nacks_test1() == SRSRAN_SUCCESS);
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TESTASSERT(malformed_status_pdu_test() == SRSRAN_SUCCESS);
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TESTASSERT(malformed_status_pdu_test2() == SRSRAN_SUCCESS);
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return SRSRAN_SUCCESS;
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}
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@ -190,6 +190,7 @@ int basic_test()
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rlc_status_pdu_t status_check = {};
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rlc_am_read_status_pdu(status_buf.msg, status_buf.N_bytes, &status_check);
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TESTASSERT(status_check.ack_sn == 5); // 5 is the last SN that was not received.
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TESTASSERT(rlc_am_is_valid_status_pdu(status_check));
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// Write status PDU to RLC1
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rlc1.write_pdu(status_buf.msg, status_buf.N_bytes);
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