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Improvements on GTPU message logging

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- Avoid multiple lines per each SDU Rx or Tx
- log info relative to source and destination of each SDU
- log info relative to whether the Rx SDU has been forwarded into a tunnel
- log info relative to whether the Rx SDUs are being buffered.
master
Francisco 4 years ago committed by Francisco Paisana
parent 5e915039e9
commit 411946c752
3 changed files with 79 additions and 59 deletions
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10
srsenb/hdr/stack/upper/gtpu.h
Unescape Escape View File

@ -61,12 +61,6 @@ private:
static const int GTPU_PORT = 2152;
void rem_tunnel(uint32_t teidin);
void send_pdu_to_tunnel(uint16_t rnti,
uint32_t lcid,
srslte::unique_byte_buffer_t pdu,
uint32_t teidout,
uint32_t spgw_addr,
int pdcp_sn = -1);
srslte::byte_buffer_pool* pool = nullptr;
stack_interface_gtpu_lte* stack = nullptr;
@ -126,6 +120,8 @@ private:
// Socket file descriptor
int fd = -1;
void send_pdu_to_tunnel(tunnel& tx_tun, srslte::unique_byte_buffer_t pdu, int pdcp_sn = -1);
void echo_response(in_addr_t addr, in_port_t port, uint16_t seq);
void error_indication(in_addr_t addr, in_port_t port, uint32_t err_teid);
void end_marker(uint32_t teidin);
@ -138,6 +134,8 @@ private:
uint32_t next_teid_in = 0;
tunnel* get_tunnel(uint32_t teidin);
void log_message(tunnel& tun, bool is_rx, srslte::span<uint8_t> pdu, int pdcp_sn = -1);
};
} // namespace srsenb

118
srsenb/src/stack/upper/gtpu.cc
Unescape Escape View File

@ -90,41 +90,25 @@ void gtpu::stop()
// gtpu_interface_pdcp
void gtpu::write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t pdu)
{
send_pdu_to_tunnel(rnti,
lcid,
std::move(pdu),
tunnels[ue_teidin_db[rnti][lcid][0]].teid_out,
tunnels[ue_teidin_db[rnti][lcid][0]].spgw_addr);
}
void gtpu::send_pdu_to_tunnel(uint16_t rnti,
uint32_t lcid,
srslte::unique_byte_buffer_t pdu,
uint32_t teidout,
uint32_t spgw_addr,
int pdcp_sn)
{
logger.info(pdu->msg, pdu->N_bytes, "TX PDU, RNTI: 0x%x, LCID: %d, n_bytes=%d", rnti, lcid, pdu->N_bytes);
tunnel& tx_tun = tunnels[ue_teidin_db.at(rnti)[lcid][0]];
log_message(tx_tun, false, srslte::make_span(pdu));
send_pdu_to_tunnel(tx_tun, std::move(pdu));
}
void gtpu::send_pdu_to_tunnel(tunnel& tx_tun, srslte::unique_byte_buffer_t pdu, int pdcp_sn)
{
// Check valid IP version
struct iphdr* ip_pkt = (struct iphdr*)pdu->msg;
if (ip_pkt->version != 4 && ip_pkt->version != 6) {
logger.error("Invalid IP version to SPGW");
return;
}
if (ip_pkt->version == 4) {
if (ntohs(ip_pkt->tot_len) != pdu->N_bytes) {
logger.error("IP Len and PDU N_bytes mismatch");
}
logger.debug("Tx S1-U PDU -- IP version %d, Total length %d", int(ip_pkt->version), ntohs(ip_pkt->tot_len));
logger.debug("Tx S1-U PDU -- IP src addr %s", srslte::gtpu_ntoa(ip_pkt->saddr).c_str());
logger.debug("Tx S1-U PDU -- IP dst addr %s", srslte::gtpu_ntoa(ip_pkt->daddr).c_str());
}
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 = teidout;
header.teid = tx_tun.teid_out;
if (pdcp_sn >= 0) {
header.flags |= GTPU_FLAGS_EXTENDED_HDR;
@ -138,7 +122,7 @@ void gtpu::send_pdu_to_tunnel(uint16_t rnti,
struct sockaddr_in servaddr;
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(spgw_addr);
servaddr.sin_addr.s_addr = htonl(tx_tun.spgw_addr);
servaddr.sin_port = htons(GTPU_PORT);
if (!gtpu_write_header(&header, pdu.get(), gtpu_log)) {
@ -163,6 +147,13 @@ uint32_t gtpu::add_bearer(uint16_t rnti, uint32_t lcid, uint32_t addr, uint32_t
ue_teidin_db[rnti][lcid].push_back(teid_in);
logger.info("Adding bearer for rnti: 0x%x, lcid: %d, addr: 0x%x, teid_out: 0x%x, teid_in: 0x%x",
rnti,
lcid,
addr,
teid_out,
teid_in);
if (props != nullptr) {
if (props->flush_before_teidin_present) {
tunnel& after_tun = tunnels.at(props->flush_before_teidin);
@ -179,13 +170,6 @@ uint32_t gtpu::add_bearer(uint16_t rnti, uint32_t lcid, uint32_t addr, uint32_t
}
}
logger.info("Adding bearer for rnti: 0x%x, lcid: %d, addr: 0x%x, teid_out: 0x%x, teid_in: 0x%x",
rnti,
lcid,
addr,
teid_out,
teid_in);
return teid_in;
}
@ -296,38 +280,23 @@ void gtpu::handle_gtpu_s1u_rx_packet(srslte::unique_byte_buffer_t pdu, const soc
uint16_t rnti = rx_tun.rnti;
uint16_t lcid = rx_tun.lcid;
log_message(rx_tun, true, srslte::make_span(pdu));
if (lcid < SRSENB_N_SRB || lcid >= SRSENB_N_RADIO_BEARERS) {
logger.error("Invalid LCID for DL PDU: %d - dropping packet", lcid);
return;
}
struct iphdr* ip_pkt = (struct iphdr*)pdu->msg;
if (ip_pkt->version != 4 && ip_pkt->version != 6) {
logger.error("Invalid IP version to SPGW");
return;
}
if (ip_pkt->version == 4) {
if (ntohs(ip_pkt->tot_len) != pdu->N_bytes) {
logger.error("IP Len and PDU N_bytes mismatch");
}
logger.debug("Rx S1-U PDU -- IPv%d, src=%s, dst=%s, length=%d",
int(ip_pkt->version),
srslte::gtpu_ntoa(ip_pkt->saddr).c_str(),
srslte::gtpu_ntoa(ip_pkt->daddr).c_str(),
ntohs(ip_pkt->tot_len));
}
if (rx_tun.fwd_teid_in_present) {
tunnel& tx_tun = tunnels.at(rx_tun.fwd_teid_in);
logger.info("Forwarding GTPU PDU rnti=0x%x, lcid=%d, n_bytes=%d", rnti, lcid, pdu->N_bytes);
send_pdu_to_tunnel(rnti, lcid, std::move(pdu), tx_tun.teid_out, tx_tun.spgw_addr);
send_pdu_to_tunnel(tx_tun, std::move(pdu));
} else if (rx_tun.prior_teid_in_present) {
logger.info(
pdu->msg, pdu->N_bytes, "Buffering RX GTPU PDU rnti=0x%x, lcid=%d, n_bytes=%d", rnti, lcid, pdu->N_bytes);
rx_tun.buffer.push_back(std::move(pdu));
} else {
logger.info(pdu->msg, pdu->N_bytes, "RX GTPU PDU rnti=0x%x, lcid=%d, n_bytes=%d", rnti, lcid, pdu->N_bytes);
uint32_t pdcp_sn = -1;
if (header.flags & GTPU_FLAGS_EXTENDED_HDR and header.next_ext_hdr_type == GTPU_EXT_HEADER_PDCP_PDU_NUMBER) {
pdcp_sn = (header.ext_buffer[1] << 8u) + header.ext_buffer[2];
@ -396,8 +365,8 @@ int gtpu::create_dl_fwd_tunnel(uint32_t rx_teid_in, uint32_t tx_teid_in)
// Get all buffered PDCP PDUs, and forward them through tx tunnel
std::map<uint32_t, srslte::unique_byte_buffer_t> pdus = pdcp->get_buffered_pdus(rx_tun.rnti, rx_tun.lcid);
for (auto& pdu_pair : pdus) {
send_pdu_to_tunnel(
rx_tun.rnti, rx_tun.lcid, std::move(pdu_pair.second), tx_tun.teid_out, tx_tun.spgw_addr, pdu_pair.first);
log_message(tx_tun, false, srslte::make_span(pdu_pair.second), pdu_pair.first);
send_pdu_to_tunnel(tx_tun, std::move(pdu_pair.second), pdu_pair.first);
}
return SRSLTE_SUCCESS;
@ -503,6 +472,53 @@ gtpu::tunnel* gtpu::get_tunnel(uint32_t teidin)
return &it->second;
}
void gtpu::log_message(tunnel& tun, bool is_rx, srslte::span<uint8_t> pdu, int pdcp_sn)
{
fmt::basic_memory_buffer<char, 1024> strbuf;
struct iphdr* ip_pkt = (struct iphdr*)pdu.data();
if (ip_pkt->version != 4 && ip_pkt->version != 6) {
logger.error("%s SDU with invalid IP version %s SPGW", is_rx ? "Received" : "Sending", is_rx ? "from" : "to");
return;
}
const char* dir = "Tx";
fmt::memory_buffer strbuf2;
if (is_rx) {
dir = "Rx";
fmt::format_to(strbuf2, "{}:0x{:0x} > ", srslte::gtpu_ntoa(htonl(tun.spgw_addr)), tun.teid_in);
if (tun.prior_teid_in_present) {
fmt::format_to(strbuf2, "DL (buffered), ");
} else if (tun.fwd_teid_in_present) {
tunnel& tx_tun = tunnels.at(tun.fwd_teid_in);
fmt::format_to(strbuf2, "{}:0x{:0x} (forwarded), ", srslte::gtpu_ntoa(htonl(tx_tun.spgw_addr)), tx_tun.teid_in);
} else {
fmt::format_to(strbuf2, "DL, ");
}
} else {
if (pdcp_sn >= 0) {
fmt::format_to(strbuf2, "DL PDCP SDU SN={} ", pdcp_sn);
} else {
fmt::format_to(strbuf2, "UL ");
}
fmt::format_to(strbuf2, "> {}:0x{:0x}, ", srslte::gtpu_ntoa(htonl(tun.spgw_addr)), tun.teid_in);
}
fmt::format_to(strbuf,
"{} S1-U SDU, {}rnti=0x{:0x}, lcid={}, n_bytes={}, IPv{}",
dir,
fmt::to_string(strbuf2),
tun.rnti,
tun.lcid,
pdu.size(),
(int)ip_pkt->version);
if (ip_pkt->version == 4) {
fmt::format_to(strbuf, " {} > {}", srslte::gtpu_ntoa(ip_pkt->saddr), srslte::gtpu_ntoa(ip_pkt->daddr));
if (ntohs(ip_pkt->tot_len) != pdu.size()) {
logger.error("IP Len and PDU N_bytes mismatch");
}
}
logger.info(pdu.data(), pdu.size(), fmt::to_string(strbuf));
}
/****************************************************************************
* Class to handle MCH packet handling
***************************************************************************/

12
srsenb/test/upper/gtpu_test.cc
Unescape Escape View File

@ -136,12 +136,18 @@ int test_gtpu_direct_tunneling()
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), sgw_addr = ntohl(sgw_sockaddr.sin_addr.s_addr);
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
srsenb::gtpu senb_gtpu(srslog::fetch_basic_logger("GTPU1")), tenb_gtpu(srslog::fetch_basic_logger("GTPU2"));
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);
srsenb::gtpu senb_gtpu(logger1), tenb_gtpu(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);
@ -164,7 +170,7 @@ int test_gtpu_direct_tunneling()
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, 0, 0, &props);
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;

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