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srsLTE
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srsLTE/lib/test/upper/rlc_um_nr_pdu_test.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 "srslte/config.h"
#include "srslte/upper/rlc.h"
#include "srslte/upper/rlc_um_nr.h"
#include <array>
#include <iostream>
#include <memory>
#include <vector>
#define TESTASSERT(cond) \
{ \
if (!(cond)) { \
std::cout << "[" << __FUNCTION__ << "][Line " << __LINE__ << "]: FAIL at " << (#cond) << std::endl; \
return -1; \
} \
}
#define PCAP 0
#define PCAP_CRNTI (0x1001)
#define PCAP_TTI (666)
using namespace srslte;
#if PCAP
#include "srslte/common/mac_nr_pcap.h"
#include "srslte/common/mac_nr_pdu.h"
static std::unique_ptr<srslte::mac_nr_pcap> pcap_handle = nullptr;
#endif
int write_pdu_to_pcap(const uint32_t lcid, const uint8_t* payload, const uint32_t len)
{
#if PCAP
if (pcap_handle) {
byte_buffer_t tx_buffer;
srslte::mac_nr_sch_pdu tx_pdu;
tx_pdu.init_tx(&tx_buffer, len + 10);
tx_pdu.add_sdu(lcid, payload, len);
tx_pdu.pack();
pcap_handle->write_dl_crnti(tx_buffer.msg, tx_buffer.N_bytes, PCAP_CRNTI, true, PCAP_TTI);
return SRSLTE_SUCCESS;
}
#endif
return SRSLTE_ERROR;
}
template <std::size_t N>
srslte::byte_buffer_t make_pdu_and_log(const std::array<uint8_t, N>& tv)
{
srslte::byte_buffer_t pdu;
memcpy(pdu.msg, tv.data(), tv.size());
pdu.N_bytes = tv.size();
write_pdu_to_pcap(4, tv.data(), tv.size());
return pdu;
}
void corrupt_pdu_header(srslte::byte_buffer_t& pdu, const uint32_t header_len, const uint32_t payload_len)
{
// clear header only
for (uint32_t i = 0; i < header_len; i++) {
pdu.msg[i] = 0xaa;
}
pdu.msg += header_len;
pdu.N_bytes = payload_len;
}
// RLC UM PDU with complete SDU
int rlc_um_nr_pdu_test1()
{
const int header_len = 1, payload_len = 4;
std::array<uint8_t, header_len + payload_len> tv = {0x00, 0x11, 0x22, 0x33, 0x44};
srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
// unpack PDU
rlc_um_nr_pdu_header_t header = {};
TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
TESTASSERT(header.si == rlc_nr_si_field_t::full_sdu);
// clear header
corrupt_pdu_header(pdu, header_len, payload_len);
// pack again
TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
TESTASSERT(pdu.N_bytes == tv.size());
TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
return SRSLTE_SUCCESS;
}
// RLC UM PDU with 6 Bit SN carrying the last segment of an SDU
int rlc_um_nr_pdu_test2()
{
// SN = 1
const int header_len = 3, payload_len = 4;
const std::array<uint8_t, header_len + payload_len> tv = {0x81, 0x01, 0x02, 0x11, 0x22, 0x33, 0x44};
srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
// unpack PDU
rlc_um_nr_pdu_header_t header = {};
TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
TESTASSERT(header.si == rlc_nr_si_field_t::last_segment);
TESTASSERT(header.sn == 1);
TESTASSERT(header.so == 258);
TESTASSERT(header.sn_size == srslte::rlc_um_nr_sn_size_t::size6bits);
// clear header
corrupt_pdu_header(pdu, header_len, payload_len);
// pack again
TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
TESTASSERT(pdu.N_bytes == tv.size());
TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
return SRSLTE_SUCCESS;
}
// RLC UM PDU with 6 Bit SN carrying a middle segment of an SDU
int rlc_um_nr_pdu_test3()
{
// SN = 3
const int header_len = 3, payload_len = 4;
const std::array<uint8_t, header_len + payload_len> tv = {0xc3, 0x01, 0x02, 0x11, 0x22, 0x33, 0x44};
srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
// unpack PDU
rlc_um_nr_pdu_header_t header = {};
TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
TESTASSERT(header.si == rlc_nr_si_field_t::neither_first_nor_last_segment);
TESTASSERT(header.so == 258);
TESTASSERT(header.sn == 3);
TESTASSERT(header.sn_size == srslte::rlc_um_nr_sn_size_t::size6bits);
// clear header
corrupt_pdu_header(pdu, header_len, payload_len);
// pack again
TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
TESTASSERT(pdu.N_bytes == tv.size());
TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
return SRSLTE_SUCCESS;
}
// RLC UM PDU with 6 Bit SN carrying a first segment of an SDU
int rlc_um_nr_pdu_test4()
{
// SN = 31
const int header_len = 1, payload_len = 4;
std::array<uint8_t, header_len + payload_len> tv = {0x5f, 0x11, 0x22, 0x33, 0x44};
srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
// unpack PDU
rlc_um_nr_pdu_header_t header = {};
TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
TESTASSERT(header.si == rlc_nr_si_field_t::first_segment);
TESTASSERT(header.so == 0);
TESTASSERT(header.sn == 31);
TESTASSERT(header.sn_size == srslte::rlc_um_nr_sn_size_t::size6bits);
// clear header
corrupt_pdu_header(pdu, header_len, payload_len);
// pack again
TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
TESTASSERT(pdu.N_bytes == tv.size());
TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
return SRSLTE_SUCCESS;
}
// This should fail unpacking because the PDU has reserved bits set
int rlc_um_nr_pdu_unpack_test5()
{
std::array<uint8_t, 7> tv = {0x33, 0x01, 0x02, 0x11, 0x22, 0x33, 0x44};
srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
// unpack PDU
rlc_um_nr_pdu_header_t header = {};
TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) == 0);
return SRSLTE_SUCCESS;
}
int main(int argc, char** argv)
{
#if PCAP
pcap_handle = std::unique_ptr<srslte::mac_nr_pcap>(new srslte::mac_nr_pcap());
pcap_handle->open("rlc_um_nr_pdu_test.pcap");
#endif
if (rlc_um_nr_pdu_test1()) {
fprintf(stderr, "rlc_um_nr_pdu_test1() failed.\n");
return SRSLTE_ERROR;
}
if (rlc_um_nr_pdu_test2()) {
fprintf(stderr, "rlc_um_nr_pdu_test2() failed.\n");
return SRSLTE_ERROR;
}
if (rlc_um_nr_pdu_test3()) {
fprintf(stderr, "rlc_um_nr_pdu_test3() failed.\n");
return SRSLTE_ERROR;
}
if (rlc_um_nr_pdu_test4()) {
fprintf(stderr, "rlc_um_nr_pdu_test4() failed.\n");
return SRSLTE_ERROR;
}
if (rlc_um_nr_pdu_unpack_test5()) {
fprintf(stderr, "rlc_um_nr_pdu_unpack_test5() failed.\n");
return SRSLTE_ERROR;
}
return SRSLTE_SUCCESS;
}
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