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srsRAN_4G/lib/test/common/pdu_test.cc

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/*
* Copyright 2013-2019 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/common/common.h"
#include "srslte/common/interfaces_common.h"
#include "srslte/common/log_filter.h"
#include "srslte/common/mac_pcap.h"
#include "srslte/common/pdu.h"
#include "srslte/interfaces/ue_interfaces.h"
#include <iostream>
#include <map>
#define TESTASSERT(cond) \
{ \
if (!(cond)) { \
std::cout << "[" << __FUNCTION__ << "][Line " << __LINE__ << "]: FAIL at " << (#cond) << std::endl; \
return -1; \
} \
}
#define HAVE_PCAP 0
static std::unique_ptr<srslte::mac_pcap> pcap_handle = nullptr;
using namespace srslte;
#define CRNTI (0x1001)
// TV1 contains a RAR PDU for a single RAPID and no backoff indication
#define RAPID_TV1 (42)
#define TA_CMD_TV1 (8)
uint8_t rar_pdu_tv1[] = {0x6a, 0x00, 0x80, 0x00, 0x0c, 0x10, 0x01};
// TV2 contains a RAR PDU for a single RAPID and also includes a backoff indication subheader
#define RAPID_TV2 (22)
#define BACKOFF_IND_TV2 (2)
#define TA_CMD_TV2 (0)
uint8_t rar_pdu_tv2[] = {0x82, 0x56, 0x00, 0x00, 0x00, 0x0c, 0x10, 0x01};
int mac_rar_pdu_unpack_test1()
{
srslte::rar_pdu rar_pdu_msg;
rar_pdu_msg.init_rx(sizeof(rar_pdu_tv1));
rar_pdu_msg.parse_packet(rar_pdu_tv1);
rar_pdu_msg.fprint(stdout);
TESTASSERT(not rar_pdu_msg.has_backoff());
while (rar_pdu_msg.next()) {
TESTASSERT(rar_pdu_msg.get()->get_rapid() == RAPID_TV1);
TESTASSERT(rar_pdu_msg.get()->get_ta_cmd() == TA_CMD_TV1);
TESTASSERT(rar_pdu_msg.get()->get_temp_crnti() == CRNTI);
}
return SRSLTE_SUCCESS;
}
int mac_rar_pdu_unpack_test2()
{
srslte::rar_pdu rar_pdu_msg;
rar_pdu_msg.init_rx(sizeof(rar_pdu_tv2));
rar_pdu_msg.parse_packet(rar_pdu_tv2);
rar_pdu_msg.fprint(stdout);
TESTASSERT(rar_pdu_msg.has_backoff());
TESTASSERT(rar_pdu_msg.get_backoff() == BACKOFF_IND_TV2);
while (rar_pdu_msg.next()) {
if (rar_pdu_msg.get()->has_rapid()) {
TESTASSERT(rar_pdu_msg.get()->get_rapid() == RAPID_TV2);
TESTASSERT(rar_pdu_msg.get()->get_ta_cmd() == TA_CMD_TV2);
TESTASSERT(rar_pdu_msg.get()->get_temp_crnti() == CRNTI);
}
}
return SRSLTE_SUCCESS;
}
int mac_rar_pdu_pack_test1()
{
// Prepare RAR grant
uint8_t grant_buffer[64] = {};
srslte_dci_rar_grant_t rar_grant = {};
rar_grant.tpc_pusch = 3;
srslte_dci_rar_pack(&rar_grant, grant_buffer);
// Create MAC PDU and add RAR subheader
srslte::rar_pdu rar_pdu;
byte_buffer_t tx_buffer;
rar_pdu.init_tx(&tx_buffer, 64);
if (rar_pdu.new_subh()) {
rar_pdu.get()->set_rapid(RAPID_TV1);
rar_pdu.get()->set_ta_cmd(TA_CMD_TV1);
rar_pdu.get()->set_temp_crnti(CRNTI);
rar_pdu.get()->set_sched_grant(grant_buffer);
}
rar_pdu.write_packet(tx_buffer.msg);
// compare with TV1
TESTASSERT(memcmp(tx_buffer.msg, rar_pdu_tv1, sizeof(rar_pdu_tv1)) == 0);
return SRSLTE_SUCCESS;
}
int mac_rar_pdu_pack_test2()
{
// Prepare RAR grant
uint8_t grant_buffer[64] = {};
srslte_dci_rar_grant_t rar_grant = {};
rar_grant.tpc_pusch = 3;
srslte_dci_rar_pack(&rar_grant, grant_buffer);
// Create MAC PDU and add RAR subheader
srslte::rar_pdu rar_pdu;
byte_buffer_t tx_buffer;
rar_pdu.init_tx(&tx_buffer, 64);
rar_pdu.set_backoff(BACKOFF_IND_TV2);
if (rar_pdu.new_subh()) {
rar_pdu.get()->set_rapid(RAPID_TV2);
rar_pdu.get()->set_ta_cmd(TA_CMD_TV2);
rar_pdu.get()->set_temp_crnti(CRNTI);
rar_pdu.get()->set_sched_grant(grant_buffer);
}
rar_pdu.write_packet(tx_buffer.msg);
// compare with TV2
TESTASSERT(memcmp(tx_buffer.msg, rar_pdu_tv2, sizeof(rar_pdu_tv2)) == 0);
return SRSLTE_SUCCESS;
}
// Helper class to provide read_pdu_interface
class rlc_dummy : public srslte::read_pdu_interface
{
public:
int read_pdu(uint32_t lcid, uint8_t* payload, uint32_t nof_bytes)
{
uint32_t len = SRSLTE_MIN(ul_queues[lcid], nof_bytes);
// set payload bytes to LCID so we can check later if the scheduling was correct
memset(payload, lcid, len);
// remove from UL queue
ul_queues[lcid] -= len;
return len;
};
void write_sdu(uint32_t lcid, uint32_t nof_bytes) { ul_queues[lcid] += nof_bytes; }
private:
// UL queues where key is LCID and value the queue length
std::map<uint32_t, uint32_t> ul_queues;
};
// Basic test to pack a MAC PDU with a two SDUs of short length (i.e < 128B for short length header) and multi-byte
// padding
int mac_sch_pdu_pack_test1()
{
static uint8_t tv[] = {0x21, 0x08, 0x22, 0x08, 0x1f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00};
srslte::log_filter rlc_log("RLC");
rlc_log.set_level(srslte::LOG_LEVEL_DEBUG);
rlc_log.set_hex_limit(100000);
rlc_dummy rlc;
srslte::log_filter mac_log("MAC");
mac_log.set_level(srslte::LOG_LEVEL_DEBUG);
mac_log.set_hex_limit(100000);
// create RLC SDUs
const uint32_t sdu_len = 8;
rlc.write_sdu(1, sdu_len);
rlc.write_sdu(2, sdu_len);
const uint32_t pdu_size = 25;
srslte::sch_pdu pdu(10);
byte_buffer_t buffer;
pdu.init_tx(&buffer, pdu_size, true);
TESTASSERT(pdu.rem_size() == pdu_size);
TESTASSERT(pdu.get_pdu_len() == pdu_size);
TESTASSERT(pdu.get_sdu_space() == pdu_size - 1);
TESTASSERT(pdu.get_current_sdu_ptr() == buffer.msg);
// Add first subheader and SDU
TESTASSERT(pdu.new_subh());
TESTASSERT(pdu.get()->set_sdu(1, sdu_len, &rlc) == sdu_len);
// Have used 8 B SDU plus 1 B subheader
TESTASSERT(pdu.rem_size() == pdu_size - 8 - 1);
// Add second SCH
TESTASSERT(pdu.new_subh());
TESTASSERT(pdu.get()->set_sdu(2, sdu_len, &rlc) == sdu_len);
TESTASSERT(pdu.rem_size() == pdu_size - 16 - 3);
// write PDU
TESTASSERT(pdu.write_packet(&mac_log) == buffer.msg);
TESTASSERT(buffer.N_bytes == pdu_size);
// log
mac_log.info_hex(buffer.msg, buffer.N_bytes, "MAC PDU (%d B):\n", buffer.N_bytes);
#if HAVE_PCAP
pcap_handle->write_ul_crnti(buffer.msg, buffer.N_bytes, 0x1001, true, 1);
#endif
// compare with TV
TESTASSERT(memcmp(buffer.msg, tv, sizeof(tv)) == 0);
return SRSLTE_SUCCESS;
}
// Basic test to pack a MAC PDU with a two SDUs of short length (i.e < 128B for short length header) and 2x single-byte
// padding
int mac_sch_pdu_pack_test2()
{
static uint8_t tv[] = {0x3f, 0x3f, 0x21, 0x08, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02};
srslte::log_filter rlc_log("RLC");
rlc_log.set_level(srslte::LOG_LEVEL_DEBUG);
rlc_log.set_hex_limit(100000);
rlc_dummy rlc;
srslte::log_filter mac_log("MAC");
mac_log.set_level(srslte::LOG_LEVEL_DEBUG);
mac_log.set_hex_limit(100000);
// create RLC SDUs
const uint32_t sdu_len = 8;
rlc.write_sdu(1, sdu_len);
rlc.write_sdu(2, sdu_len);
const uint32_t pdu_size = 21;
srslte::sch_pdu pdu(10);
byte_buffer_t buffer;
pdu.init_tx(&buffer, pdu_size, true);
TESTASSERT(pdu.rem_size() == pdu_size);
TESTASSERT(pdu.get_pdu_len() == pdu_size);
TESTASSERT(pdu.get_sdu_space() == pdu_size - 1);
TESTASSERT(pdu.get_current_sdu_ptr() == buffer.msg);
// Add first subheader and SDU
TESTASSERT(pdu.new_subh());
TESTASSERT(pdu.get()->set_sdu(1, sdu_len, &rlc) == sdu_len);
// Have used 8 B SDU plus 1 B subheader
TESTASSERT(pdu.rem_size() == pdu_size - 8 - 1);
// Add second SCH
TESTASSERT(pdu.new_subh());
TESTASSERT(pdu.get()->set_sdu(2, sdu_len, &rlc) == sdu_len);
TESTASSERT(pdu.rem_size() == pdu_size - 16 - 3);
// write PDU
pdu.write_packet(&mac_log);
// log
mac_log.info_hex(buffer.msg, buffer.N_bytes, "MAC PDU (%d B):\n", buffer.N_bytes);
#if HAVE_PCAP
pcap_handle->write_ul_crnti(buffer.msg, buffer.N_bytes, 0x1001, true, 1);
#endif
// compare with TV
TESTASSERT(memcmp(buffer.msg, tv, sizeof(tv)) == 0);
return SRSLTE_SUCCESS;
}
// Basic test to pack a MAC PDU with one short and one long SDU (i.e >= 128 B for 16bit length header)
int mac_sch_pdu_pack_test3()
{
static uint8_t tv[] = {
0x21, 0x08, 0x22, 0x80, 0x82, 0x1f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
srslte::log_filter rlc_log("RLC");
rlc_log.set_level(srslte::LOG_LEVEL_DEBUG);
rlc_log.set_hex_limit(100000);
rlc_dummy rlc;
srslte::log_filter mac_log("MAC");
mac_log.set_level(srslte::LOG_LEVEL_DEBUG);
mac_log.set_hex_limit(100000);
// create RLC SDUs
// const uint32_t sdu_len = 130;
rlc.write_sdu(1, 8);
rlc.write_sdu(2, 130);
const uint32_t pdu_size = 150;
srslte::sch_pdu pdu(10);
byte_buffer_t buffer;
pdu.init_tx(&buffer, pdu_size, true);
TESTASSERT(pdu.rem_size() == pdu_size);
TESTASSERT(pdu.get_pdu_len() == pdu_size);
TESTASSERT(pdu.get_sdu_space() == pdu_size - 1);
TESTASSERT(pdu.get_current_sdu_ptr() == buffer.msg);
TESTASSERT(pdu.new_subh());
TESTASSERT(pdu.get()->set_sdu(1, 8, &rlc));
// Have used 8 B SDU plus 1 B subheader
TESTASSERT(pdu.rem_size() == pdu_size - 8 - 1);
TESTASSERT(pdu.new_subh());
TESTASSERT(pdu.get()->set_sdu(2, 130, &rlc));
// Have used 138 B SDU plus 3 B subheader
TESTASSERT(pdu.rem_size() == pdu_size - 138 - 3);
// write PDU
pdu.write_packet(&mac_log);
// log
mac_log.info_hex(buffer.msg, buffer.N_bytes, "MAC PDU (%d B):\n", buffer.N_bytes);
#if HAVE_PCAP
pcap_handle->write_ul_crnti(buffer.msg, buffer.N_bytes, 0x1001, true, 1);
#endif
// compare with TV
TESTASSERT(memcmp(buffer.msg, tv, sizeof(tv)) == 0);
return SRSLTE_SUCCESS;
}
int main(int argc, char** argv)
{
#if HAVE_PCAP
pcap_handle = std::unique_ptr<srslte::mac_pcap>(new srslte::mac_pcap());
pcap_handle->open("mac_pdu_test.pcap");
#endif
if (mac_rar_pdu_unpack_test1()) {
fprintf(stderr, "mac_rar_pdu_unpack_test1 failed.\n");
return SRSLTE_ERROR;
}
if (mac_rar_pdu_unpack_test2()) {
fprintf(stderr, "mac_rar_pdu_unpack_test2 failed.\n");
return SRSLTE_ERROR;
}
if (mac_rar_pdu_pack_test1()) {
fprintf(stderr, "mac_rar_pdu_pack_test1 failed.\n");
return SRSLTE_ERROR;
}
if (mac_rar_pdu_pack_test2()) {
fprintf(stderr, "mac_rar_pdu_pack_test2 failed.\n");
return SRSLTE_ERROR;
}
if (mac_sch_pdu_pack_test1()) {
fprintf(stderr, "mac_sch_pdu_pack_test1 failed.\n");
return SRSLTE_ERROR;
}
if (mac_sch_pdu_pack_test2()) {
fprintf(stderr, "mac_sch_pdu_pack_test2 failed.\n");
return SRSLTE_ERROR;
}
if (mac_sch_pdu_pack_test3()) {
fprintf(stderr, "mac_sch_pdu_pack_test3 failed.\n");
return SRSLTE_ERROR;
}
return SRSLTE_SUCCESS;
}
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