mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
267 lines
10 KiB
C++
267 lines
10 KiB
C++
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2020 Software Radio Systems Limited
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the distribution.
|
|
*
|
|
*/
|
|
|
|
#include "srslte/asn1/s1ap.h"
|
|
#include <linux/ip.h>
|
|
#include <numeric>
|
|
#include <random>
|
|
|
|
#include "srsenb/hdr/stack/upper/gtpu.h"
|
|
#include "srsenb/test/common/dummy_classes.h"
|
|
#include "srslte/common/network_utils.h"
|
|
#include "srslte/common/test_common.h"
|
|
#include "srslte/upper/gtpu.h"
|
|
|
|
namespace srsenb {
|
|
|
|
static const size_t PDU_HEADER_SIZE = 20;
|
|
|
|
class stack_tester : public stack_interface_gtpu_lte
|
|
{
|
|
public:
|
|
int s1u_fd;
|
|
void add_gtpu_s1u_socket_handler(int fd) { s1u_fd = fd; }
|
|
void add_gtpu_m1u_socket_handler(int fd) {}
|
|
};
|
|
|
|
class pdcp_tester : public pdcp_dummy
|
|
{
|
|
public:
|
|
void write_sdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu, int pdcp_sn) override
|
|
{
|
|
last_sdu = std::move(sdu);
|
|
last_pdcp_sn = pdcp_sn;
|
|
last_rnti = rnti;
|
|
last_lcid = lcid;
|
|
}
|
|
std::map<uint32_t, srslte::unique_byte_buffer_t> get_buffered_pdus(uint16_t rnti, uint32_t lcid) override
|
|
{
|
|
return std::move(buffered_pdus);
|
|
}
|
|
void send_status_report(uint16_t rnti) override {}
|
|
void send_status_report(uint16_t rnti, uint32_t lcid) override {}
|
|
|
|
void push_buffered_pdu(uint32_t sn, srslte::unique_byte_buffer_t pdu) { buffered_pdus[sn] = std::move(pdu); }
|
|
|
|
void clear()
|
|
{
|
|
last_sdu = nullptr;
|
|
last_pdcp_sn = -1;
|
|
last_lcid = 0;
|
|
last_rnti = SRSLTE_INVALID_RNTI;
|
|
}
|
|
|
|
std::map<uint32_t, srslte::unique_byte_buffer_t> buffered_pdus;
|
|
srslte::unique_byte_buffer_t last_sdu;
|
|
int last_pdcp_sn = -1;
|
|
uint16_t last_rnti = SRSLTE_INVALID_RNTI;
|
|
uint32_t last_lcid = 0;
|
|
};
|
|
|
|
int GTPU_PORT = 2152;
|
|
|
|
srslte::unique_byte_buffer_t encode_ipv4_packet(srslte::span<uint8_t> data,
|
|
uint32_t teid,
|
|
const struct sockaddr_in& src_sockaddr_in,
|
|
const struct sockaddr_in& dest_sockaddr_in)
|
|
{
|
|
srslte::unique_byte_buffer_t pdu = srslte::make_byte_buffer();
|
|
|
|
struct iphdr ip_pkt = {};
|
|
ip_pkt.version = 4;
|
|
ip_pkt.tot_len = htons(data.size() + sizeof(struct iphdr));
|
|
ip_pkt.saddr = src_sockaddr_in.sin_addr.s_addr;
|
|
ip_pkt.daddr = dest_sockaddr_in.sin_addr.s_addr;
|
|
pdu->append_bytes((uint8_t*)&ip_pkt, sizeof(struct iphdr));
|
|
pdu->append_bytes(data.data(), data.size());
|
|
|
|
return pdu;
|
|
}
|
|
|
|
srslte::unique_byte_buffer_t encode_gtpu_packet(srslte::span<uint8_t> data,
|
|
uint32_t teid,
|
|
const struct sockaddr_in& src_sockaddr_in,
|
|
const struct sockaddr_in& dest_sockaddr_in)
|
|
{
|
|
srslte::unique_byte_buffer_t pdu = encode_ipv4_packet(data, teid, src_sockaddr_in, dest_sockaddr_in);
|
|
|
|
// header
|
|
srslte::gtpu_header_t header = {};
|
|
header.flags = GTPU_FLAGS_VERSION_V1 | GTPU_FLAGS_GTP_PROTOCOL;
|
|
header.message_type = GTPU_MSG_DATA_PDU;
|
|
header.length = pdu->N_bytes;
|
|
header.teid = teid;
|
|
|
|
gtpu_write_header(&header, pdu.get(), srslog::fetch_basic_logger("GTPU"));
|
|
return pdu;
|
|
}
|
|
|
|
srslte::unique_byte_buffer_t encode_end_marker(uint32_t teid)
|
|
{
|
|
srslte::unique_byte_buffer_t pdu = srslte::make_byte_buffer();
|
|
|
|
// header
|
|
srslte::gtpu_header_t header = {};
|
|
header.flags = GTPU_FLAGS_VERSION_V1 | GTPU_FLAGS_GTP_PROTOCOL;
|
|
header.message_type = GTPU_MSG_END_MARKER;
|
|
header.length = 0;
|
|
header.teid = teid;
|
|
|
|
gtpu_write_header(&header, pdu.get(), srslog::fetch_basic_logger("GTPU"));
|
|
return pdu;
|
|
}
|
|
|
|
srslte::unique_byte_buffer_t read_socket(int fd)
|
|
{
|
|
srslte::unique_byte_buffer_t pdu = srslte::make_byte_buffer();
|
|
pdu->N_bytes = read(fd, pdu->msg, pdu->get_tailroom());
|
|
return pdu;
|
|
}
|
|
|
|
int test_gtpu_direct_tunneling()
|
|
{
|
|
uint16_t rnti = 0x46, rnti2 = 0x50;
|
|
uint32_t drb1 = 3;
|
|
uint32_t sgw_teidout1 = 1, sgw_teidout2 = 2;
|
|
const char * sgw_addr_str = "127.0.0.1", *senb_addr_str = "127.0.1.1", *tenb_addr_str = "127.0.1.2";
|
|
struct sockaddr_in senb_sockaddr = {}, sgw_sockaddr = {}, tenb_sockaddr = {};
|
|
srslte::net_utils::set_sockaddr(&senb_sockaddr, senb_addr_str, GTPU_PORT);
|
|
srslte::net_utils::set_sockaddr(&sgw_sockaddr, sgw_addr_str, GTPU_PORT);
|
|
srslte::net_utils::set_sockaddr(&tenb_sockaddr, tenb_addr_str, GTPU_PORT);
|
|
uint32_t tenb_addr = ntohl(tenb_sockaddr.sin_addr.s_addr);
|
|
uint32_t senb_addr = ntohl(senb_sockaddr.sin_addr.s_addr);
|
|
uint32_t sgw_addr = ntohl(sgw_sockaddr.sin_addr.s_addr);
|
|
|
|
srslte::unique_byte_buffer_t pdu;
|
|
|
|
// Initiate layers
|
|
srslog::basic_logger& logger1 = srslog::fetch_basic_logger("GTPU1");
|
|
logger1.set_hex_dump_max_size(2048);
|
|
srslog::basic_logger& logger2 = srslog::fetch_basic_logger("GTPU2");
|
|
logger2.set_hex_dump_max_size(2048);
|
|
srslte::task_scheduler task_sched;
|
|
srsenb::gtpu senb_gtpu(&task_sched, logger1), tenb_gtpu(&task_sched, logger2);
|
|
stack_tester senb_stack, tenb_stack;
|
|
pdcp_tester senb_pdcp, tenb_pdcp;
|
|
senb_gtpu.init(senb_addr_str, sgw_addr_str, "", "", &senb_pdcp, &senb_stack, false);
|
|
tenb_gtpu.init(tenb_addr_str, sgw_addr_str, "", "", &tenb_pdcp, &tenb_stack, false);
|
|
|
|
// create tunnels MME-SeNB and MME-TeNB
|
|
uint32_t senb_teid_in = senb_gtpu.add_bearer(rnti, drb1, sgw_addr, sgw_teidout1);
|
|
uint32_t tenb_teid_in = tenb_gtpu.add_bearer(rnti2, drb1, sgw_addr, sgw_teidout2);
|
|
|
|
// Buffer PDUs in SeNB PDCP
|
|
for (size_t sn = 6; sn < 10; ++sn) {
|
|
std::vector<uint8_t> data(10, sn);
|
|
pdu = encode_ipv4_packet(data, senb_teid_in, sgw_sockaddr, senb_sockaddr);
|
|
senb_pdcp.push_buffered_pdu(sn, std::move(pdu));
|
|
}
|
|
|
|
// create direct tunnel SeNB-TeNB
|
|
gtpu::bearer_props props;
|
|
props.flush_before_teidin_present = true;
|
|
props.flush_before_teidin = tenb_teid_in;
|
|
uint32_t dl_tenb_teid_in = tenb_gtpu.add_bearer(rnti2, drb1, senb_addr, 0, &props);
|
|
props = {};
|
|
props.forward_from_teidin_present = true;
|
|
props.forward_from_teidin = senb_teid_in;
|
|
senb_gtpu.add_bearer(rnti, drb1, tenb_addr, dl_tenb_teid_in, &props);
|
|
|
|
std::random_device rd;
|
|
std::mt19937 g(rd());
|
|
std::vector<uint8_t> data_vec(10);
|
|
std::iota(data_vec.begin(), data_vec.end(), 0);
|
|
std::vector<uint8_t> encoded_data;
|
|
srslte::span<uint8_t> pdu_view{};
|
|
|
|
// TEST: GTPU buffers incoming PDCP buffered SNs until the TEID is explicitly activated
|
|
tenb_gtpu.handle_gtpu_s1u_rx_packet(read_socket(tenb_stack.s1u_fd), senb_sockaddr);
|
|
TESTASSERT(tenb_pdcp.last_sdu == nullptr);
|
|
tenb_gtpu.handle_gtpu_s1u_rx_packet(read_socket(tenb_stack.s1u_fd), senb_sockaddr);
|
|
TESTASSERT(tenb_pdcp.last_sdu == nullptr);
|
|
tenb_gtpu.set_tunnel_status(dl_tenb_teid_in, true);
|
|
pdu_view = srslte::make_span(tenb_pdcp.last_sdu);
|
|
TESTASSERT(std::count(pdu_view.begin() + PDU_HEADER_SIZE, pdu_view.end(), 7) == 10);
|
|
TESTASSERT(tenb_pdcp.last_rnti == rnti2);
|
|
TESTASSERT(tenb_pdcp.last_lcid == drb1);
|
|
TESTASSERT(tenb_pdcp.last_pdcp_sn == (int)7);
|
|
|
|
// TEST: verify that PDCP buffered SNs have been forwarded through SeNB->TeNB tunnel
|
|
for (size_t sn = 8; sn < 10; ++sn) {
|
|
tenb_gtpu.handle_gtpu_s1u_rx_packet(read_socket(tenb_stack.s1u_fd), senb_sockaddr);
|
|
pdu_view = srslte::make_span(tenb_pdcp.last_sdu);
|
|
TESTASSERT(std::count(pdu_view.begin() + PDU_HEADER_SIZE, pdu_view.end(), sn) == 10);
|
|
TESTASSERT(tenb_pdcp.last_rnti == rnti2);
|
|
TESTASSERT(tenb_pdcp.last_lcid == drb1);
|
|
TESTASSERT(tenb_pdcp.last_pdcp_sn == (int)sn);
|
|
}
|
|
|
|
// TEST: verify that incoming DL data MME->SeNB is forwarded through SeNB->TeNB tunnel
|
|
std::shuffle(data_vec.begin(), data_vec.end(), g);
|
|
pdu = encode_gtpu_packet(data_vec, senb_teid_in, sgw_sockaddr, senb_sockaddr);
|
|
encoded_data.assign(pdu->msg + 8u, pdu->msg + pdu->N_bytes);
|
|
senb_gtpu.handle_gtpu_s1u_rx_packet(std::move(pdu), sgw_sockaddr);
|
|
tenb_gtpu.handle_gtpu_s1u_rx_packet(read_socket(tenb_stack.s1u_fd), senb_sockaddr);
|
|
pdu_view = srslte::make_span(tenb_pdcp.last_sdu);
|
|
TESTASSERT(pdu_view.size() == encoded_data.size() and
|
|
std::equal(pdu_view.begin(), pdu_view.end(), encoded_data.begin()));
|
|
TESTASSERT(tenb_pdcp.last_rnti == rnti2 and tenb_pdcp.last_lcid == drb1);
|
|
|
|
// TEST: verify that MME->TeNB packets are buffered until SeNB->TeNB tunnel is closed
|
|
tenb_pdcp.clear();
|
|
size_t N_pdus = std::uniform_int_distribution<size_t>{1, 30}(g);
|
|
for (size_t i = 0; i < N_pdus; ++i) {
|
|
std::fill(data_vec.begin(), data_vec.end(), i);
|
|
pdu = encode_gtpu_packet(data_vec, senb_teid_in, sgw_sockaddr, tenb_sockaddr);
|
|
tenb_gtpu.handle_gtpu_s1u_rx_packet(std::move(pdu), sgw_sockaddr);
|
|
// The PDUs are being buffered
|
|
TESTASSERT(tenb_pdcp.last_sdu == nullptr);
|
|
}
|
|
// PDUs coming from SeNB-TeNB tunnel are forwarded
|
|
std::iota(data_vec.begin(), data_vec.end(), 0);
|
|
std::shuffle(data_vec.begin(), data_vec.end(), g);
|
|
pdu = encode_gtpu_packet(data_vec, senb_teid_in, sgw_sockaddr, senb_sockaddr);
|
|
encoded_data.assign(pdu->msg + 8u, pdu->msg + pdu->N_bytes);
|
|
senb_gtpu.handle_gtpu_s1u_rx_packet(std::move(pdu), sgw_sockaddr);
|
|
tenb_gtpu.handle_gtpu_s1u_rx_packet(read_socket(tenb_stack.s1u_fd), senb_sockaddr);
|
|
TESTASSERT(tenb_pdcp.last_sdu->N_bytes == encoded_data.size() and
|
|
memcmp(tenb_pdcp.last_sdu->msg, encoded_data.data(), encoded_data.size()) == 0);
|
|
tenb_pdcp.clear();
|
|
// EndMarker is forwarded via MME->SeNB->TeNB, and TeNB buffered PDUs are flushed
|
|
pdu = encode_end_marker(senb_teid_in);
|
|
senb_gtpu.handle_gtpu_s1u_rx_packet(std::move(pdu), sgw_sockaddr);
|
|
tenb_gtpu.handle_gtpu_s1u_rx_packet(read_socket(tenb_stack.s1u_fd), senb_sockaddr);
|
|
srslte::span<uint8_t> encoded_data2{tenb_pdcp.last_sdu->msg + 20u, tenb_pdcp.last_sdu->msg + 30u};
|
|
TESTASSERT(std::all_of(encoded_data2.begin(), encoded_data2.end(), [N_pdus](uint8_t b) { return b == N_pdus - 1; }));
|
|
|
|
return SRSLTE_SUCCESS;
|
|
}
|
|
|
|
} // namespace srsenb
|
|
|
|
int main()
|
|
{
|
|
// Setup logging.
|
|
auto& logger = srslog::fetch_basic_logger("GTPU", false);
|
|
logger.set_level(srslog::basic_levels::debug);
|
|
logger.set_hex_dump_max_size(-1);
|
|
|
|
// Start the log backend.
|
|
srslog::init();
|
|
|
|
TESTASSERT(srsenb::test_gtpu_direct_tunneling() == SRSLTE_SUCCESS);
|
|
|
|
srslog::flush();
|
|
|
|
srslte::console("Success");
|
|
}
|