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241 lines
7.8 KiB
C++
241 lines
7.8 KiB
C++
/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include "srslte/config.h"
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#include "srslte/upper/rlc.h"
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#include "srslte/upper/rlc_um.h"
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#include <array>
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#include <iostream>
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#include <memory>
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#include <vector>
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#define TESTASSERT(cond) \
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{ \
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if (!(cond)) { \
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std::cout << "[" << __FUNCTION__ << "][Line " << __LINE__ << "]: FAIL at " << (#cond) << std::endl; \
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return -1; \
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} \
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}
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#define PCAP 0
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#define PCAP_CRNTI (0x1001)
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#define PCAP_TTI (666)
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using namespace srslte;
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#if PCAP
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#include "srslte/common/mac_nr_pcap.h"
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#include "srslte/common/mac_nr_pdu.h"
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static std::unique_ptr<srslte::mac_nr_pcap> pcap_handle = nullptr;
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#endif
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int write_pdu_to_pcap(const uint32_t lcid, const uint8_t* payload, const uint32_t len)
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{
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#if PCAP
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if (pcap_handle) {
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byte_buffer_t tx_buffer;
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srslte::mac_nr_pdu tx_pdu;
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tx_pdu.init_tx(&tx_buffer, len + 10);
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tx_pdu.add_sdu(lcid, payload, len);
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tx_pdu.pack();
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pcap_handle->write_dl_crnti(tx_buffer.msg, tx_buffer.N_bytes, PCAP_CRNTI, true, PCAP_TTI);
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return SRSLTE_SUCCESS;
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}
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#endif
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return SRSLTE_ERROR;
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}
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template <std::size_t N>
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srslte::byte_buffer_t make_pdu_and_log(const std::array<uint8_t, N>& tv)
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{
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srslte::byte_buffer_t pdu;
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memcpy(pdu.msg, tv.data(), tv.size());
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pdu.N_bytes = tv.size();
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write_pdu_to_pcap(4, tv.data(), tv.size());
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return pdu;
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}
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void corrupt_pdu_header(srslte::byte_buffer_t& pdu, const uint32_t header_len, const uint32_t payload_len)
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{
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// clear header only
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for (uint32_t i = 0; i < header_len; i++) {
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pdu.msg[i] = 0xaa;
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}
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pdu.msg += header_len;
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pdu.N_bytes = payload_len;
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}
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// RLC UM PDU with complete SDU
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int rlc_um_nr_pdu_test1()
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{
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const int header_len = 1, payload_len = 4;
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std::array<uint8_t, header_len + payload_len> tv = {0x00, 0x11, 0x22, 0x33, 0x44};
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srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
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// unpack PDU
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rlc_um_nr_pdu_header_t header = {};
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TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
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TESTASSERT(header.si == rlc_nr_si_field_t::full_sdu);
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// clear header
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corrupt_pdu_header(pdu, header_len, payload_len);
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// pack again
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TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
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TESTASSERT(pdu.N_bytes == tv.size());
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TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
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return SRSLTE_SUCCESS;
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}
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// RLC UM PDU with 6 Bit SN carrying the last segment of an SDU
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int rlc_um_nr_pdu_test2()
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{
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// SN = 1
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const int header_len = 3, payload_len = 4;
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const std::array<uint8_t, header_len + payload_len> tv = {0x81, 0x01, 0x02, 0x11, 0x22, 0x33, 0x44};
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srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
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// unpack PDU
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rlc_um_nr_pdu_header_t header = {};
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TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
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TESTASSERT(header.si == rlc_nr_si_field_t::last_segment);
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TESTASSERT(header.sn == 1);
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TESTASSERT(header.so == 258);
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TESTASSERT(header.sn_size == srslte::rlc_um_nr_sn_size_t::size6bits);
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// clear header
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corrupt_pdu_header(pdu, header_len, payload_len);
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// pack again
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TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
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TESTASSERT(pdu.N_bytes == tv.size());
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TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
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return SRSLTE_SUCCESS;
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}
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// RLC UM PDU with 6 Bit SN carrying a middle segment of an SDU
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int rlc_um_nr_pdu_test3()
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{
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// SN = 3
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const int header_len = 3, payload_len = 4;
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const std::array<uint8_t, header_len + payload_len> tv = {0xc3, 0x01, 0x02, 0x11, 0x22, 0x33, 0x44};
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srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
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// unpack PDU
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rlc_um_nr_pdu_header_t header = {};
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TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
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TESTASSERT(header.si == rlc_nr_si_field_t::neither_first_nor_last_segment);
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TESTASSERT(header.so == 258);
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TESTASSERT(header.sn == 3);
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TESTASSERT(header.sn_size == srslte::rlc_um_nr_sn_size_t::size6bits);
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// clear header
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corrupt_pdu_header(pdu, header_len, payload_len);
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// pack again
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TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
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TESTASSERT(pdu.N_bytes == tv.size());
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TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
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return SRSLTE_SUCCESS;
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}
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// RLC UM PDU with 6 Bit SN carrying a first segment of an SDU
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int rlc_um_nr_pdu_test4()
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{
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// SN = 31
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const int header_len = 1, payload_len = 4;
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std::array<uint8_t, header_len + payload_len> tv = {0x5f, 0x11, 0x22, 0x33, 0x44};
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srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
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// unpack PDU
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rlc_um_nr_pdu_header_t header = {};
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TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) != 0);
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TESTASSERT(header.si == rlc_nr_si_field_t::first_segment);
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TESTASSERT(header.so == 0);
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TESTASSERT(header.sn == 31);
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TESTASSERT(header.sn_size == srslte::rlc_um_nr_sn_size_t::size6bits);
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// clear header
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corrupt_pdu_header(pdu, header_len, payload_len);
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// pack again
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TESTASSERT(rlc_um_nr_write_data_pdu_header(header, &pdu) == header_len);
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TESTASSERT(pdu.N_bytes == tv.size());
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TESTASSERT(memcmp(pdu.msg, tv.data(), pdu.N_bytes) == 0);
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return SRSLTE_SUCCESS;
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}
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// This should fail unpacking because the PDU has reserved bits set
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int rlc_um_nr_pdu_unpack_test5()
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{
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std::array<uint8_t, 7> tv = {0x33, 0x01, 0x02, 0x11, 0x22, 0x33, 0x44};
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srslte::byte_buffer_t pdu = make_pdu_and_log(tv);
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// unpack PDU
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rlc_um_nr_pdu_header_t header = {};
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TESTASSERT(rlc_um_nr_read_data_pdu_header(&pdu, srslte::rlc_um_nr_sn_size_t::size6bits, &header) == 0);
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return SRSLTE_SUCCESS;
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}
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int main(int argc, char** argv)
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{
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#if PCAP
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pcap_handle = std::unique_ptr<srslte::mac_nr_pcap>(new srslte::mac_nr_pcap());
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pcap_handle->open("rlc_um_nr_pdu_test.pcap");
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#endif
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if (rlc_um_nr_pdu_test1()) {
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fprintf(stderr, "rlc_um_nr_pdu_test1() failed.\n");
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return SRSLTE_ERROR;
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}
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if (rlc_um_nr_pdu_test2()) {
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fprintf(stderr, "rlc_um_nr_pdu_test2() failed.\n");
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return SRSLTE_ERROR;
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}
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if (rlc_um_nr_pdu_test3()) {
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fprintf(stderr, "rlc_um_nr_pdu_test3() failed.\n");
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return SRSLTE_ERROR;
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}
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if (rlc_um_nr_pdu_test4()) {
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fprintf(stderr, "rlc_um_nr_pdu_test4() failed.\n");
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return SRSLTE_ERROR;
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}
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if (rlc_um_nr_pdu_unpack_test5()) {
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fprintf(stderr, "rlc_um_nr_pdu_unpack_test5() failed.\n");
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return SRSLTE_ERROR;
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}
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return SRSLTE_SUCCESS;
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}
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