neels has uploaded this change for review.
per-HNB GTP-U traffic counters via nft
Add external dependency libnftables.
When an hNodeB registers, set up netfilter rules to count GTP-U packets
(UDP port 2152) to and from that hNodeB's address -- we are assuming
that it is the same address that Iuh is connecting from.
This is a "workaround" to get performance indicators per hNodeB, without
needing a UPF that supports URR.
Related: SYS#6773
Change-Id: I35b7e97fd039e36633dfde1317170527c82f9f68
---
M configure.ac
M include/osmocom/hnbgw/hnbgw.h
A include/osmocom/hnbgw/nft_kpi.h
M src/osmo-hnbgw/Makefile.am
M src/osmo-hnbgw/hnbgw.c
M src/osmo-hnbgw/hnbgw_hnbap.c
M src/osmo-hnbgw/hnbgw_vty.c
A src/osmo-hnbgw/nft_kpi.c
M src/osmo-hnbgw/tdefs.c
9 files changed, 447 insertions(+), 2 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-hnbgw refs/changes/85/36385/1
diff --git a/configure.ac b/configure.ac
index bb8d29e..bea9a76 100644
--- a/configure.ac
+++ b/configure.ac
@@ -59,6 +59,7 @@
PKG_CHECK_MODULES(LIBOSMORANAP, libosmo-ranap >= 1.5.0)
PKG_CHECK_MODULES(LIBOSMOHNBAP, libosmo-hnbap >= 1.5.0)
PKG_CHECK_MODULES(LIBOSMOMGCPCLIENT, libosmo-mgcp-client >= 1.12.0)
+PKG_CHECK_MODULES(LIBNFTABLES, libnftables >= 1.0.2)
# Enable PFCP support for GTP tunnel mapping via UPF
AC_ARG_ENABLE([pfcp], [AS_HELP_STRING([--enable-pfcp], [Build with PFCP support, for GTP tunnel mapping via UPF])],
diff --git a/include/osmocom/hnbgw/hnbgw.h b/include/osmocom/hnbgw/hnbgw.h
index b3ba3b2..fd36168 100644
--- a/include/osmocom/hnbgw/hnbgw.h
+++ b/include/osmocom/hnbgw/hnbgw.h
@@ -6,6 +6,7 @@
#include <osmocom/core/write_queue.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/rate_ctr.h>
+#include <osmocom/core/sockaddr_str.h>
#include <osmocom/gsm/gsm23003.h>
#include <osmocom/sigtran/sccp_sap.h>
#include <osmocom/sigtran/osmo_ss7.h>
@@ -18,6 +19,8 @@
#include <osmocom/mgcp_client/mgcp_client.h>
#include <osmocom/mgcp_client/mgcp_client_pool.h>
+#include <osmocom/hnbgw/nft_kpi.h>
+
#define STORE_UPTIME_INTERVAL 10 /* seconds */
#define HNB_STORE_RAB_DURATIONS_INTERVAL 1 /* seconds */
@@ -29,6 +32,7 @@
DMGW,
DHNB,
DCN,
+ DNFT,
};
extern const struct log_info hnbgw_log_info;
@@ -132,6 +136,11 @@
HNB_CTR_CS_PAGING_ATTEMPTED,
HNB_CTR_RAB_ACTIVE_MILLISECONDS_TOTAL,
+
+ HNB_CTR_GTPU_DOWNLOAD_PACKETS,
+ HNB_CTR_GTPU_DOWNLOAD_GTP_BYTES,
+ HNB_CTR_GTPU_UPLOAD_PACKETS,
+ HNB_CTR_GTPU_UPLOAD_GTP_BYTES,
};
enum hnb_stat {
@@ -353,6 +362,14 @@
struct rate_ctr_group *ctrs;
struct osmo_stat_item_group *statg;
+
+ struct {
+ struct osmo_sockaddr_str addr_remote;
+ struct {
+ struct nft_kpi_val rx;
+ struct nft_kpi_val tx;
+ } last;
+ } nft_kpi;
};
struct ue_context {
@@ -450,7 +467,9 @@
void hnb_context_release_ue_state(struct hnb_context *ctx);
struct hnb_persistent *hnb_persistent_alloc(const struct umts_cell_id *id);
-struct hnb_persistent *hnb_persistent_find_by_id(const struct umts_cell_id *id);
+struct hnb_persistent *hnb_persistent_find_by_id(const struct umts_cell_id *id_str);
+struct hnb_persistent *hnb_persistent_find_by_id_str(const char *id);
+void hnb_persistent_update_addr(struct hnb_persistent *hnbp, int new_fd);
void hnb_persistent_free(struct hnb_persistent *hnbp);
void hnbgw_vty_init(void);
diff --git a/include/osmocom/hnbgw/nft_kpi.h b/include/osmocom/hnbgw/nft_kpi.h
new file mode 100644
index 0000000..d56946f
--- /dev/null
+++ b/include/osmocom/hnbgw/nft_kpi.h
@@ -0,0 +1,14 @@
+#pragma once
+#include <stdint.h>
+
+struct hnb_persistent;
+
+struct nft_kpi_val {
+ uint64_t packets;
+ uint64_t bytes;
+};
+
+int hnb_nft_kpi_start(struct hnb_persistent *hnbp);
+int hnb_nft_kpi_end(struct hnb_persistent *hnbp);
+
+const char *nft_kpi_read_counters(void);
diff --git a/src/osmo-hnbgw/Makefile.am b/src/osmo-hnbgw/Makefile.am
index 0727f30..1ee6e44 100644
--- a/src/osmo-hnbgw/Makefile.am
+++ b/src/osmo-hnbgw/Makefile.am
@@ -20,6 +20,7 @@
$(LIBOSMORANAP_CFLAGS) \
$(LIBOSMOHNBAP_CFLAGS) \
$(LIBOSMOMGCPCLIENT_CFLAGS) \
+ $(LIBNFTABLES_CFLAGS) \
$(NULL)
AM_LDFLAGS = \
@@ -46,6 +47,7 @@
mgw_fsm.c \
kpi_ranap.c \
tdefs.c \
+ nft_kpi.c \
$(NULL)
libhnbgw_la_LIBADD = \
@@ -62,6 +64,7 @@
$(LIBOSMOHNBAP_LIBS) \
$(LIBSCTP_LIBS) \
$(LIBOSMOMGCPCLIENT_LIBS) \
+ $(LIBNFTABLES_LIBS) \
$(NULL)
if ENABLE_PFCP
diff --git a/src/osmo-hnbgw/hnbgw.c b/src/osmo-hnbgw/hnbgw.c
index fff900a..1e27ee2 100644
--- a/src/osmo-hnbgw/hnbgw.c
+++ b/src/osmo-hnbgw/hnbgw.c
@@ -340,8 +340,10 @@
}
/* remove back reference from hnb_persistent to context */
- if (ctx->persistent)
+ if (ctx->persistent) {
+ hnb_nft_kpi_end(ctx->persistent);
ctx->persistent->ctx = NULL;
+ }
talloc_free(ctx);
}
@@ -455,6 +457,24 @@
[HNB_CTR_RAB_ACTIVE_MILLISECONDS_TOTAL] = {
"rab:cs:active_milliseconds:total", "Cumulative number of milliseconds of CS RAB activity" },
+
+ [HNB_CTR_GTPU_DOWNLOAD_PACKETS] = {
+ "gtpu:dl:packets",
+ "Count of total GTP-U packets sent to the HNB.",
+ },
+ [HNB_CTR_GTPU_DOWNLOAD_GTP_BYTES] = {
+ "gtpu:dl:gtpbytes",
+ "Count of total GTP-U bytes sent to the HNB, including the GTP-U header.",
+ },
+ [HNB_CTR_GTPU_UPLOAD_PACKETS] = {
+ "gtpu:ul:packets",
+ "Count of total GTP-U packets received from the HNB.",
+ },
+ [HNB_CTR_GTPU_UPLOAD_GTP_BYTES] = {
+ "gtpu:ul:gtpbytes",
+ "Count of total GTP-U bytes received from the HNB, including the GTP-U header.",
+ },
+
};
const struct rate_ctr_group_desc hnb_ctrg_desc = {
@@ -517,9 +537,49 @@
return NULL;
}
+struct hnb_persistent *hnb_persistent_find_by_id_str(const char *id_str)
+{
+ struct hnb_persistent *hnbp;
+ llist_for_each_entry(hnbp, &g_hnbgw->hnb_persistent_list, list) {
+ if (strcmp(hnbp->id_str, id_str))
+ continue;
+ return hnbp;
+ }
+ return NULL;
+}
+
+void hnb_persistent_update_addr(struct hnb_persistent *hnbp, int new_fd)
+{
+ int rc;
+ socklen_t socklen;
+ struct osmo_sockaddr osa;
+ struct osmo_sockaddr_str remote_str;
+
+ socklen = sizeof(struct osmo_sockaddr);
+ rc = getpeername(new_fd, &osa.u.sa, &socklen);
+ if (!rc)
+ rc = osmo_sockaddr_str_from_osa(&remote_str, &osa);
+ if (rc < 0) {
+ LOGP(DHNB, LOGL_ERROR, "cannot read remote hNodeB address from Iuh file descriptor\n");
+ return;
+ }
+
+ if (!osmo_sockaddr_str_cmp(&remote_str, &hnbp->nft_kpi.addr_remote)) {
+ /* The remote address is unchanged, no need to update the nft probe */
+ return;
+ }
+
+ /* The remote address has changed. Cancel previous probe, if any, and start a new one. */
+ if (osmo_sockaddr_str_is_nonzero(&hnbp->nft_kpi.addr_remote))
+ hnb_nft_kpi_end(hnbp);
+ hnbp->nft_kpi.addr_remote = remote_str;
+ hnb_nft_kpi_start(hnbp);
+}
+
void hnb_persistent_free(struct hnb_persistent *hnbp)
{
/* FIXME: check if in use? */
+ hnb_nft_kpi_end(hnbp);
llist_del(&hnbp->list);
talloc_free(hnbp);
}
@@ -845,6 +905,11 @@
.color = OSMO_LOGCOLOR_DARKYELLOW,
.description = "Core Network side (via SCCP)",
},
+ [DNFT] = {
+ .name = "DNFT", .loglevel = LOGL_NOTICE, .enabled = 1,
+ .color = OSMO_LOGCOLOR_BLUE,
+ .description = "netfilter counters for per-HNB traffic counters",
+ },
};
const struct log_info hnbgw_log_info = {
diff --git a/src/osmo-hnbgw/hnbgw_hnbap.c b/src/osmo-hnbgw/hnbgw_hnbap.c
index b2ff911..4a2e1b9 100644
--- a/src/osmo-hnbgw/hnbgw_hnbap.c
+++ b/src/osmo-hnbgw/hnbgw_hnbap.c
@@ -494,6 +494,8 @@
ctx->hnb_registered = true;
+ hnb_persistent_update_addr(ctx->persistent, osmo_stream_srv_get_fd(ctx->conn));
+
/* Send HNBRegisterAccept */
rc = hnbgw_tx_hnb_register_acc(ctx);
hnbap_free_hnbregisterrequesties(&ies);
diff --git a/src/osmo-hnbgw/hnbgw_vty.c b/src/osmo-hnbgw/hnbgw_vty.c
index c5af249..832ffb6 100644
--- a/src/osmo-hnbgw/hnbgw_vty.c
+++ b/src/osmo-hnbgw/hnbgw_vty.c
@@ -35,6 +35,7 @@
#include <osmocom/hnbgw/hnbgw_cn.h>
#include <osmocom/hnbgw/context_map.h>
#include <osmocom/hnbgw/tdefs.h>
+#include <osmocom/hnbgw/nft_kpi.h>
#include <osmocom/sigtran/protocol/sua.h>
#include <osmocom/sigtran/sccp_helpers.h>
#include <osmocom/netif/stream.h>
@@ -741,6 +742,14 @@
return CMD_SUCCESS;
}
+DEFUN(show_nft, show_nft_cmd,
+ "show nft",
+ SHOW_STR "nft counters")
+{
+ vty_out(vty, "%s%s", nft_kpi_read_counters(), VTY_NEWLINE);
+ return CMD_SUCCESS;
+}
+
/* Hidden since it exists only for use by ttcn3 tests */
DEFUN_HIDDEN(cnpool_roundrobin_next, cnpool_roundrobin_next_cmd,
"cnpool roundrobin next (msc|sgsn) " CNLINK_NR_RANGE,
@@ -1164,4 +1173,6 @@
install_element_ve(&show_nri_cmd);
install_element(ENABLE_NODE, &cnpool_roundrobin_next_cmd);
install_element(ENABLE_NODE, &cnlink_ranap_reset_cmd);
+
+ install_element_ve(&show_nft_cmd);
}
diff --git a/src/osmo-hnbgw/nft_kpi.c b/src/osmo-hnbgw/nft_kpi.c
new file mode 100644
index 0000000..3360bcb
--- /dev/null
+++ b/src/osmo-hnbgw/nft_kpi.c
@@ -0,0 +1,310 @@
+/* Set up and read internet traffic counters using netfilter */
+/* Copyright (C) 2024 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ * All Rights Reserved
+ *
+ * Author: Neels Janosch Hofmeyr <nhofmeyr@sysmocom.de>
+ *
+ * This program 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.
+ *
+ * This program 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.
+ */
+
+#include <stdbool.h>
+#include <ctype.h>
+
+#include <nftables/libnftables.h>
+
+#include <osmocom/core/logging.h>
+#include <osmocom/core/timer.h>
+#include <osmocom/hnbgw/nft_kpi.h>
+#include <osmocom/hnbgw/hnbgw.h>
+#include <osmocom/hnbgw/tdefs.h>
+
+struct nft_kpi_state {
+ struct {
+ struct nft_ctx *nft_ctx;
+ char *table_name;
+ bool table_created;
+ } nft;
+ struct osmo_timer_list period;
+};
+
+static struct nft_kpi_state g_nft_kpi_state = {};
+
+static struct nft_ctx *g_nft_ctx(void)
+{
+ struct nft_kpi_state *s = &g_nft_kpi_state;
+
+ if (s->nft.nft_ctx)
+ return s->nft.nft_ctx;
+
+ s->nft.nft_ctx = nft_ctx_new(NFT_CTX_DEFAULT);
+ if (!s->nft.nft_ctx) {
+ LOGP(DNFT, LOGL_ERROR, "cannot allocate libnftables nft_ctx\n");
+ OSMO_ASSERT(false);
+ }
+
+ return s->nft.nft_ctx;
+}
+
+static int nft_run_now(const char *buffer)
+{
+ int rc;
+ const int logmax = 256;
+
+ rc = nft_run_cmd_from_buffer(g_nft_ctx(), buffer);
+ if (rc < 0) {
+ LOGP(DNFT, LOGL_ERROR, "error running nft buffer: rc=%d buffer=%s\n",
+ rc, osmo_quote_str_c(OTC_SELECT, buffer, -1));
+ return -EIO;
+ }
+
+ if (log_check_level(DNFT, LOGL_DEBUG)) {
+ size_t l = strlen(buffer);
+ LOGP(DNFT, LOGL_DEBUG, "ran nft buffer, %zu chars: \"%s%s\"\n",
+ l,
+ osmo_escape_cstr_c(OTC_SELECT, buffer, OSMO_MIN(logmax, l)),
+ l > logmax ? "..." : "");
+ }
+
+ return 0;
+}
+
+static void nft_kpi_period_cb(void *data);
+
+static void nft_kpi_period_schedule(void)
+{
+ unsigned long period = osmo_tdef_get(hnbgw_T_defs, -34, OSMO_TDEF_S, 10);
+ if (period < 1)
+ period = 1;
+ osmo_timer_setup(&g_nft_kpi_state.period, nft_kpi_period_cb, NULL);
+ osmo_timer_schedule(&g_nft_kpi_state.period, period, 0);
+}
+
+static int nft_kpi_init(void)
+{
+ struct nft_kpi_state *s = &g_nft_kpi_state;
+
+ if (s->nft.table_created)
+ return 0;
+
+ if (!s->nft.table_name || !*s->nft.table_name)
+ s->nft.table_name = talloc_strdup(g_hnbgw, "osmo-hnbgw");
+
+ if (nft_run_now(talloc_asprintf(OTC_SELECT, "add table inet %s { flags owner; };\n", s->nft.table_name)))
+ return -EIO;
+
+ s->nft.table_created = true;
+ nft_kpi_period_schedule();
+ return 0;
+}
+
+/* Set up counters for the hNodeB's remote address */
+int hnb_nft_kpi_start(struct hnb_persistent *hnbp)
+{
+ struct nft_kpi_state *s = &g_nft_kpi_state;
+ char *cmd;
+
+ nft_kpi_init();
+
+ hnbp->nft_kpi.last.rx = (struct nft_kpi_val){};
+ hnbp->nft_kpi.last.tx = (struct nft_kpi_val){};
+
+ cmd = talloc_asprintf(OTC_SELECT,
+ "add chain inet %s hnb-rx-%s {"
+ " type filter hook input priority filter;"
+ " ip protocol udp udp sport 2152 udp dport 2152 ip saddr %s counter;"
+ "};\n"
+ "add chain inet %s hnb-tx-%s {"
+ " type filter hook output priority filter;"
+ " ip protocol udp udp sport 2152 udp dport 2152 ip daddr %s counter;"
+ "};\n",
+ s->nft.table_name,
+ hnbp->id_str,
+ hnbp->nft_kpi.addr_remote.ip,
+ s->nft.table_name,
+ hnbp->id_str,
+ hnbp->nft_kpi.addr_remote.ip);
+ return nft_run_now(cmd);
+}
+
+int hnb_nft_kpi_end(struct hnb_persistent *hnbp)
+{
+ struct nft_kpi_state *s = &g_nft_kpi_state;
+ char *cmd;
+
+ if (!s->nft.table_created)
+ return 0;
+
+ if (!osmo_sockaddr_str_is_nonzero(&hnbp->nft_kpi.addr_remote))
+ return 0;
+ hnbp->nft_kpi.addr_remote = (struct osmo_sockaddr_str){};
+
+ cmd = talloc_asprintf(OTC_SELECT,
+ "delete chain inet %s hnb-rx-%s;\n"
+ "delete chain inet %s hnb-tx-%s;\n",
+ s->nft.table_name,
+ hnbp->id_str,
+ s->nft.table_name,
+ hnbp->id_str);
+ return nft_run_now(cmd);
+}
+
+static void update_ctr(struct rate_ctr_group *cg, int cgidx, uint64_t *last_val, uint64_t new_val)
+{
+ if (new_val <= *last_val)
+ return;
+ rate_ctr_add2(cg, cgidx, new_val - *last_val);
+ *last_val = new_val;
+}
+
+static void hnb_update_counters(struct hnb_persistent *hnbp, bool rx, int64_t packets, int64_t bytes)
+{
+ update_ctr(hnbp->ctrs,
+ rx ? HNB_CTR_GTPU_UPLOAD_PACKETS : HNB_CTR_GTPU_DOWNLOAD_PACKETS,
+ rx ? &hnbp->nft_kpi.last.rx.packets : &hnbp->nft_kpi.last.tx.packets,
+ packets);
+ update_ctr(hnbp->ctrs,
+ rx ? HNB_CTR_GTPU_UPLOAD_GTP_BYTES : HNB_CTR_GTPU_DOWNLOAD_GTP_BYTES,
+ rx ? &hnbp->nft_kpi.last.rx.bytes : &hnbp->nft_kpi.last.tx.bytes,
+ bytes);
+}
+
+const char *nft_kpi_read_counters(void)
+{
+ int rc;
+ const int logmax = 256;
+ struct nft_kpi_state *s = &g_nft_kpi_state;
+ struct nft_ctx *nft = s->nft.nft_ctx;
+ char *cmd;
+ const char *output = NULL;
+ const char *pos;
+ char buf[128];
+
+ if (!nft)
+ return NULL;
+
+ cmd = talloc_asprintf(OTC_SELECT, "list table inet %s", s->nft.table_name);
+
+ rc = nft_ctx_buffer_output(nft);
+ if (rc) {
+ LOGP(DNFT, LOGL_ERROR, "error: nft_ctx_buffer_output() returned failure: rc=%d cmd=%s\n",
+ rc, osmo_quote_str_c(OTC_SELECT, cmd, -1));
+ goto unbuffer_and_exit;
+ }
+ rc = nft_run_cmd_from_buffer(nft, cmd);
+ if (rc < 0) {
+ LOGP(DNFT, LOGL_ERROR, "error running nft cmd: rc=%d cmd=%s\n",
+ rc, osmo_quote_str_c(OTC_SELECT, cmd, -1));
+ goto unbuffer_and_exit;
+ }
+ if (log_check_level(DNFT, LOGL_DEBUG)) {
+ size_t l = strlen(cmd);
+ LOGP(DNFT, LOGL_DEBUG, "ran nft request, %zu chars: \"%s%s\"\n",
+ l,
+ osmo_escape_cstr_c(OTC_SELECT, cmd, OSMO_MIN(logmax, l)),
+ l > logmax ? "..." : "");
+ }
+
+ output = nft_ctx_get_output_buffer(nft);
+
+ pos = output;
+ while (*pos) {
+ const char *id, *id_end;
+ const char *chain_end;
+ const char *counter;
+ const char *counter_end;
+ int64_t packets;
+ int64_t bytes;
+ bool rx;
+ struct hnb_persistent *hnbp;
+
+ id = strstr(pos, "chain hnb-");
+ if (!id)
+ break;
+ id += 10;
+
+ if (osmo_str_startswith(id, "rx-"))
+ rx = true;
+ else if (osmo_str_startswith(id, "tx-"))
+ rx = false;
+ else
+ break;
+ id += 3;
+
+ id_end = id;
+ while (*id_end && *id_end != ' ' && *id_end != '{')
+ id_end++;
+
+ osmo_strlcpy(buf, id, OSMO_MIN(sizeof(buf), id_end - id + 1));
+
+ hnbp = hnb_persistent_find_by_id_str(buf);
+ if (!hnbp)
+ break;
+
+ if (!osmo_str_startswith(id_end, " {"))
+ break;
+ chain_end = id_end + 2;
+ while (*chain_end && *chain_end != '}')
+ chain_end++;
+
+ counter = strstr(id_end + 2, "counter packets ");
+ if (!counter)
+ break;
+ counter += 16;
+ if (counter > chain_end)
+ break;
+ if (!isdigit(*counter))
+ break;
+
+ counter_end = counter;
+ while (isdigit(*counter_end))
+ counter_end++;
+ if (counter_end > chain_end)
+ break;
+ osmo_strlcpy(buf, counter, OSMO_MIN(sizeof(buf), counter_end - counter + 1));
+ if (osmo_str_to_int64(&packets, buf, 10, 0, INT64_MAX))
+ break;
+ if (packets < 0)
+ break;
+
+ counter = strstr(counter_end, " bytes ");
+ if (!counter)
+ break;
+ counter += 7;
+ if (counter > chain_end)
+ break;
+ if (!isdigit(*counter))
+ break;
+ counter_end = counter;
+ while (isdigit(*counter_end))
+ counter_end++;
+ if (counter_end > chain_end)
+ break;
+ osmo_strlcpy(buf, counter, OSMO_MIN(sizeof(buf), counter_end - counter + 1));
+ if (osmo_str_to_int64(&bytes, buf, 10, 0, INT64_MAX))
+ break;
+ if (bytes < 0)
+ break;
+
+ hnb_update_counters(hnbp, rx, packets, bytes);
+
+ pos = chain_end + 1;
+ }
+
+unbuffer_and_exit:
+ nft_ctx_unbuffer_output(nft);
+ return output;
+}
+
+static void nft_kpi_period_cb(void *data)
+{
+ nft_kpi_read_counters();
+ nft_kpi_period_schedule();
+}
diff --git a/src/osmo-hnbgw/tdefs.c b/src/osmo-hnbgw/tdefs.c
index af09d17..bb54049 100644
--- a/src/osmo-hnbgw/tdefs.c
+++ b/src/osmo-hnbgw/tdefs.c
@@ -36,6 +36,7 @@
{.T = 4, .default_val = 5, .desc = "Timeout to receive RANAP RESET ACKNOWLEDGE from an MSC/SGSN" },
{.T = -31, .default_val = 15, .desc = "Timeout for establishing and releasing context maps (RUA <-> SCCP)" },
{.T = -1002, .default_val = 10, .desc = "Timeout for the HNB to respond to PS RAB Assignment Request" },
+ {.T = -34, .default_val = 10, .desc = "Period to query network traffic stats from netfilter" },
{ }
};
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