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authorHolger Hans Peter Freyther <holger@moiji-mobile.com>2015-05-03 22:34:01 +0200
committerHolger Hans Peter Freyther <holger@moiji-mobile.com>2015-05-03 22:34:16 +0200
commit337343d159888886eaa68476b70dbe19db93845b (patch)
tree318a8135477e0dcc8f8e24d2380342c254ab9d60
parent38159428d2b1e95a2c6fa91775f7b3678aef2f1f (diff)
parentd26b8fcbe22eb4a56c87f0114a0e826551243511 (diff)
Merge branch 'zecke/features/acc-list'
Integrate the change and see how it is going. The unit tests for the NAT look good so we might not have regressions.
-rw-r--r--openbsc/configure.ac1
-rw-r--r--openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg5
-rw-r--r--openbsc/include/openbsc/Makefile.am2
-rw-r--r--openbsc/include/openbsc/bsc_msg_filter.h107
-rw-r--r--openbsc/include/openbsc/bsc_nat.h82
-rw-r--r--openbsc/include/openbsc/bsc_nat_sccp.h7
-rw-r--r--openbsc/include/openbsc/debug.h1
-rw-r--r--openbsc/include/openbsc/osmo_bsc.h5
-rw-r--r--openbsc/include/openbsc/osmo_msc_data.h4
-rw-r--r--openbsc/src/Makefile.am2
-rw-r--r--openbsc/src/libcommon/debug.c5
-rw-r--r--openbsc/src/libfilter/Makefile.am11
-rw-r--r--openbsc/src/libfilter/bsc_msg_acc.c116
-rw-r--r--openbsc/src/libfilter/bsc_msg_filter.c401
-rw-r--r--openbsc/src/libfilter/bsc_msg_vty.c140
-rw-r--r--openbsc/src/osmo-bsc/Makefile.am4
-rw-r--r--openbsc/src/osmo-bsc/osmo_bsc_api.c91
-rw-r--r--openbsc/src/osmo-bsc/osmo_bsc_main.c9
-rw-r--r--openbsc/src/osmo-bsc/osmo_bsc_vty.c66
-rw-r--r--openbsc/src/osmo-bsc_nat/Makefile.am3
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_nat.c31
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_nat_ctrl.c11
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_nat_filter.c370
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_nat_utils.c123
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_nat_vty.c127
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_ussd.c20
-rw-r--r--openbsc/tests/bsc-nat/Makefile.am8
-rw-r--r--openbsc/tests/bsc-nat/bsc_nat_test.c59
28 files changed, 1098 insertions, 713 deletions
diff --git a/openbsc/configure.ac b/openbsc/configure.ac
index 00d1b70..394972f 100644
--- a/openbsc/configure.ac
+++ b/openbsc/configure.ac
@@ -179,6 +179,7 @@ AC_OUTPUT(
src/libmsc/Makefile
src/libmgcp/Makefile
src/libcommon/Makefile
+ src/libfilter/Makefile
src/osmo-nitb/Makefile
src/osmo-bsc/Makefile
src/osmo-bsc_nat/Makefile
diff --git a/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg b/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg
index d746196..fd4c3d7 100644
--- a/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg
+++ b/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg
@@ -98,3 +98,8 @@ msc
timeout-ping 20
timeout-pong 5
dest 192.168.100.11 6666 0
+ access-list-name msc-list
+ no access-list-name
+bsc
+ no access-list-name
+ access-list-name bsc-list
diff --git a/openbsc/include/openbsc/Makefile.am b/openbsc/include/openbsc/Makefile.am
index d2b30de..254f43d 100644
--- a/openbsc/include/openbsc/Makefile.am
+++ b/openbsc/include/openbsc/Makefile.am
@@ -16,7 +16,7 @@ noinst_HEADERS = abis_nm.h abis_rsl.h db.h gsm_04_08.h gsm_data.h \
arfcn_range_encode.h nat_rewrite_trie.h bsc_nat_callstats.h \
osmux.h mgcp_transcode.h gprs_utils.h \
gprs_gb_parse.h smpp.h meas_feed.h gprs_gsup_messages.h \
- gprs_gsup_client.h
+ gprs_gsup_client.h bsc_msg_filter.h
openbsc_HEADERS = gsm_04_08.h meas_rep.h bsc_api.h
openbscdir = $(includedir)/openbsc
diff --git a/openbsc/include/openbsc/bsc_msg_filter.h b/openbsc/include/openbsc/bsc_msg_filter.h
new file mode 100644
index 0000000..a9dedf4
--- /dev/null
+++ b/openbsc/include/openbsc/bsc_msg_filter.h
@@ -0,0 +1,107 @@
+#pragma once
+
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/msgfile.h>
+#include <osmocom/core/linuxrbtree.h>
+#include <osmocom/core/linuxlist.h>
+
+#include <regex.h>
+
+struct vty;
+struct gsm48_hdr;
+
+struct bsc_filter_reject_cause {
+ int lu_reject_cause;
+ int cm_reject_cause;
+};
+
+struct bsc_filter_barr_entry {
+ struct rb_node node;
+
+ char *imsi;
+ int cm_reject_cause;
+ int lu_reject_cause;
+};
+
+enum bsc_filter_acc_ctr {
+ ACC_LIST_LOCAL_FILTER,
+ ACC_LIST_GLOBAL_FILTER,
+};
+
+struct bsc_msg_acc_lst {
+ struct llist_head list;
+
+ /* counter */
+ struct rate_ctr_group *stats;
+
+ /* the name of the list */
+ const char *name;
+ struct llist_head fltr_list;
+};
+
+struct bsc_msg_acc_lst_entry {
+ struct llist_head list;
+
+ /* the filter */
+ char *imsi_allow;
+ regex_t imsi_allow_re;
+ char *imsi_deny;
+ regex_t imsi_deny_re;
+
+ /* reject reasons for the access lists */
+ int cm_reject_cause;
+ int lu_reject_cause;
+};
+
+enum {
+ FLT_CON_TYPE_NONE,
+ FLT_CON_TYPE_LU,
+ FLT_CON_TYPE_CM_SERV_REQ,
+ FLT_CON_TYPE_PAG_RESP,
+ FLT_CON_TYPE_SSA,
+ FLT_CON_TYPE_LOCAL_REJECT,
+ FLT_CON_TYPE_OTHER,
+};
+
+
+struct bsc_filter_state {
+ char *imsi;
+ int imsi_checked;
+ int con_type;
+};
+
+struct bsc_filter_request {
+ void *ctx;
+ struct rb_root *black_list;
+ struct llist_head *access_lists;
+ const char *local_lst_name;
+ const char *global_lst_name;
+ int bsc_nr;
+};
+
+
+int bsc_filter_barr_adapt(void *ctx, struct rb_root *rbtree, const struct osmo_config_list *);
+int bsc_filter_barr_find(struct rb_root *root, const char *imsi, int *cm, int *lu);
+
+/**
+ * Content filtering.
+ */
+int bsc_msg_filter_initial(struct gsm48_hdr *hdr, size_t size,
+ struct bsc_filter_request *req,
+ int *con_type, char **imsi,
+ struct bsc_filter_reject_cause *cause);
+int bsc_msg_filter_data(struct gsm48_hdr *hdr, size_t size,
+ struct bsc_filter_request *req,
+ struct bsc_filter_state *state,
+ struct bsc_filter_reject_cause *cause);
+
+/* IMSI allow/deny handling */
+struct bsc_msg_acc_lst *bsc_msg_acc_lst_find(struct llist_head *lst, const char *name);
+struct bsc_msg_acc_lst *bsc_msg_acc_lst_get(void *ctx, struct llist_head *lst, const char *name);
+void bsc_msg_acc_lst_delete(struct bsc_msg_acc_lst *lst);
+
+struct bsc_msg_acc_lst_entry *bsc_msg_acc_lst_entry_create(struct bsc_msg_acc_lst *);
+int bsc_msg_acc_lst_check_allow(struct bsc_msg_acc_lst *lst, const char *imsi);
+
+void bsc_msg_lst_vty_init(void *ctx, struct llist_head *lst, int node);
+void bsc_msg_acc_lst_write(struct vty *vty, struct bsc_msg_acc_lst *lst);
diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index 19144e3..ae940b3 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -22,6 +22,7 @@
#define BSC_NAT_H
#include "mgcp.h"
+#include "bsc_msg_filter.h"
#include <osmocom/core/select.h>
@@ -47,16 +48,6 @@ struct bsc_nat;
struct bsc_nat_ussd_con;
struct nat_rewrite_rule;
-enum {
- NAT_CON_TYPE_NONE,
- NAT_CON_TYPE_LU,
- NAT_CON_TYPE_CM_SERV_REQ,
- NAT_CON_TYPE_PAG_RESP,
- NAT_CON_TYPE_SSA,
- NAT_CON_TYPE_LOCAL_REJECT,
- NAT_CON_TYPE_OTHER,
-};
-
/*
* Is this terminated to the MSC, to the local machine (release
* handling for IMSI filtering) or to a USSD provider?
@@ -229,36 +220,6 @@ struct bsc_nat_statistics {
} ussd;
};
-enum bsc_nat_acc_ctr {
- ACC_LIST_BSC_FILTER,
- ACC_LIST_NAT_FILTER,
-};
-
-struct bsc_nat_acc_lst {
- struct llist_head list;
-
- /* counter */
- struct rate_ctr_group *stats;
-
- /* the name of the list */
- const char *name;
- struct llist_head fltr_list;
-};
-
-struct bsc_nat_acc_lst_entry {
- struct llist_head list;
-
- /* the filter */
- char *imsi_allow;
- regex_t imsi_allow_re;
- char *imsi_deny;
- regex_t imsi_deny_re;
-
- /* reject reasons for the access lists */
- int cm_reject_cause;
- int lu_reject_cause;
-};
-
/**
* the structure of the "nat" network
*/
@@ -355,11 +316,6 @@ struct bsc_nat_ussd_con {
struct osmo_timer_list auth_timeout;
};
-struct bsc_nat_reject_cause {
- int lu_reject_cause;
- int cm_reject_cause;
-};
-
/* create and init the structures */
struct bsc_config *bsc_config_alloc(struct bsc_nat *nat, const char *token);
struct bsc_config *bsc_config_num(struct bsc_nat *nat, int num);
@@ -390,16 +346,6 @@ int bsc_nat_vty_init(struct bsc_nat *nat);
int bsc_nat_find_paging(struct msgb *msg, const uint8_t **,int *len);
/**
- * Content filtering.
- */
-int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg,
- struct bsc_nat_parsed *, int *con_type, char **imsi,
- struct bsc_nat_reject_cause *cause);
-int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
- struct nat_sccp_connection *con, struct bsc_nat_parsed *parsed,
- struct bsc_nat_reject_cause *cause);
-
-/**
* SCCP patching and handling
*/
struct nat_sccp_connection *create_sccp_src_ref(struct bsc_connection *bsc, struct bsc_nat_parsed *parsed);
@@ -435,14 +381,6 @@ int bsc_do_write(struct osmo_wqueue *queue, struct msgb *msg, int id);
int bsc_write_msg(struct osmo_wqueue *queue, struct msgb *msg);
int bsc_write_cb(struct osmo_fd *bfd, struct msgb *msg);
-/* IMSI allow/deny handling */
-struct bsc_nat_acc_lst *bsc_nat_acc_lst_find(struct bsc_nat *nat, const char *name);
-struct bsc_nat_acc_lst *bsc_nat_acc_lst_get(struct bsc_nat *nat, const char *name);
-void bsc_nat_acc_lst_delete(struct bsc_nat_acc_lst *lst);
-
-struct bsc_nat_acc_lst_entry *bsc_nat_acc_lst_entry_create(struct bsc_nat_acc_lst *);
-int bsc_nat_lst_check_allow(struct bsc_nat_acc_lst *lst, const char *imsi);
-
int bsc_nat_msc_is_connected(struct bsc_nat *nat);
int bsc_conn_type_to_ctr(struct nat_sccp_connection *conn);
@@ -478,17 +416,6 @@ struct bsc_nat_num_rewr_entry {
void bsc_nat_num_rewr_entry_adapt(void *ctx, struct llist_head *head, const struct osmo_config_list *);
-struct bsc_nat_barr_entry {
- struct rb_node node;
-
- char *imsi;
- int cm_reject_cause;
- int lu_reject_cause;
-};
-
-int bsc_nat_barr_adapt(void *ctx, struct rb_root *rbtree, const struct osmo_config_list *);
-int bsc_nat_barr_find(struct rb_root *root, const char *imsi, int *cm, int *lu);
-
void bsc_nat_send_mgcp_to_msc(struct bsc_nat *bsc_nat, struct msgb *msg);
void bsc_nat_handle_mgcp(struct bsc_nat *bsc, struct msgb *msg);
@@ -499,6 +426,13 @@ int bsc_nat_handle_ctrlif_msg(struct bsc_connection *bsc, struct msgb *msg);
int bsc_nat_extract_lac(struct bsc_connection *bsc, struct nat_sccp_connection *con,
struct bsc_nat_parsed *parsed, struct msgb *msg);
+int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg,
+ struct bsc_nat_parsed *, int *con_type, char **imsi,
+ struct bsc_filter_reject_cause *cause);
+int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
+ struct nat_sccp_connection *con, struct bsc_nat_parsed *parsed,
+ struct bsc_filter_reject_cause *cause);
+
/**
* CTRL interface helper
*/
diff --git a/openbsc/include/openbsc/bsc_nat_sccp.h b/openbsc/include/openbsc/bsc_nat_sccp.h
index 0561df1..0824664 100644
--- a/openbsc/include/openbsc/bsc_nat_sccp.h
+++ b/openbsc/include/openbsc/bsc_nat_sccp.h
@@ -22,6 +22,8 @@
#ifndef BSC_NAT_SCCP_H
#define BSC_NAT_SCCP_H
+#include "bsc_msg_filter.h"
+
#include <osmocom/sccp/sccp_types.h>
/*
@@ -77,11 +79,10 @@ struct nat_sccp_connection {
int has_remote_ref;
/* status */
- int con_type;
int con_local;
int authorized;
- int imsi_checked;
- char *imsi;
+
+ struct bsc_filter_state filter_state;
uint16_t lac;
uint16_t ci;
diff --git a/openbsc/include/openbsc/debug.h b/openbsc/include/openbsc/debug.h
index bbb3ee6..19d8fc2 100644
--- a/openbsc/include/openbsc/debug.h
+++ b/openbsc/include/openbsc/debug.h
@@ -32,6 +32,7 @@ enum {
DNAT,
DCTRL,
DSMPP,
+ DFILTER,
Debug_LastEntry,
};
diff --git a/openbsc/include/openbsc/osmo_bsc.h b/openbsc/include/openbsc/osmo_bsc.h
index 19b879f..fd5303d 100644
--- a/openbsc/include/openbsc/osmo_bsc.h
+++ b/openbsc/include/openbsc/osmo_bsc.h
@@ -4,6 +4,7 @@
#define OSMO_BSC_H
#include "bsc_api.h"
+#include "bsc_msg_filter.h"
#define BSS_SEND_USSD 1
@@ -41,6 +42,8 @@ struct osmo_bsc_sccp_con {
struct gsm_subscriber_connection *conn;
uint8_t new_subscriber;
+
+ struct bsc_filter_state filter_state;
};
struct bsc_api *osmo_bsc_api();
@@ -63,4 +66,6 @@ int bsc_ctrl_cmds_install();
void bsc_gen_location_state_trap(struct gsm_bts *bts);
+struct llist_head *bsc_access_lists(void);
+
#endif
diff --git a/openbsc/include/openbsc/osmo_msc_data.h b/openbsc/include/openbsc/osmo_msc_data.h
index bdc762a..2d863aa 100644
--- a/openbsc/include/openbsc/osmo_msc_data.h
+++ b/openbsc/include/openbsc/osmo_msc_data.h
@@ -92,6 +92,8 @@ struct osmo_msc_data {
/* ussd text when MSC has entered the grace period */
char *ussd_grace_txt;
+
+ char *acc_lst_name;
};
/*
@@ -112,6 +114,8 @@ struct osmo_bsc_data {
/* ussd text when there is no MSC available */
char *ussd_no_msc_txt;
+
+ char *acc_lst_name;
};
diff --git a/openbsc/src/Makefile.am b/openbsc/src/Makefile.am
index db7603b..6f6174e 100644
--- a/openbsc/src/Makefile.am
+++ b/openbsc/src/Makefile.am
@@ -2,7 +2,7 @@ AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(COVERAGE_LDFLAGS)
-SUBDIRS = libcommon libmgcp libbsc libmsc libtrau osmo-nitb osmo-bsc_mgcp utils ipaccess gprs
+SUBDIRS = libcommon libmgcp libbsc libmsc libtrau libfilter osmo-nitb osmo-bsc_mgcp utils ipaccess gprs
# Conditional modules
if BUILD_NAT
diff --git a/openbsc/src/libcommon/debug.c b/openbsc/src/libcommon/debug.c
index ca7ff5d..7fb3ecb 100644
--- a/openbsc/src/libcommon/debug.c
+++ b/openbsc/src/libcommon/debug.c
@@ -160,6 +160,11 @@ static const struct log_info_cat default_categories[] = {
.description = "SMPP interface for external SMS apps",
.enabled = 1, .loglevel = LOGL_DEBUG,
},
+ [DFILTER] = {
+ .name = "DFILTER",
+ .description = "BSC/NAT IMSI based filtering",
+ .enabled = 1, .loglevel = LOGL_DEBUG,
+ },
};
enum log_filter {
diff --git a/openbsc/src/libfilter/Makefile.am b/openbsc/src/libfilter/Makefile.am
new file mode 100644
index 0000000..4dbc590
--- /dev/null
+++ b/openbsc/src/libfilter/Makefile.am
@@ -0,0 +1,11 @@
+AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) \
+ $(LIBOSMOVTY_CFLAGS) $(LIBOSMOABIS_CFLAGS) $(COVERAGE_CFLAGS)
+
+noinst_LIBRARIES = libfilter.a
+
+libfilter_a_SOURCES = \
+ bsc_msg_filter.c \
+ bsc_msg_acc.c \
+ bsc_msg_vty.c
+
diff --git a/openbsc/src/libfilter/bsc_msg_acc.c b/openbsc/src/libfilter/bsc_msg_acc.c
new file mode 100644
index 0000000..6258b35
--- /dev/null
+++ b/openbsc/src/libfilter/bsc_msg_acc.c
@@ -0,0 +1,116 @@
+/*
+ * (C) 2010-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010-2011 by On-Waves
+ * All Rights Reserved
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <openbsc/bsc_msg_filter.h>
+#include <openbsc/bsc_nat.h>
+
+#include <osmocom/core/rate_ctr.h>
+
+#include <string.h>
+
+static const struct rate_ctr_desc acc_list_ctr_description[] = {
+ [ACC_LIST_LOCAL_FILTER] = { "access-list.local-filter", "Rejected by rule for local"},
+ [ACC_LIST_GLOBAL_FILTER]= { "access-list.global-filter", "Rejected by rule for global"},
+};
+
+static const struct rate_ctr_group_desc bsc_cfg_acc_list_desc = {
+ .group_name_prefix = "nat.filter",
+ .group_description = "NAT Access-List Statistics",
+ .num_ctr = ARRAY_SIZE(acc_list_ctr_description),
+ .ctr_desc = acc_list_ctr_description,
+};
+
+
+int bsc_msg_acc_lst_check_allow(struct bsc_msg_acc_lst *lst, const char *mi_string)
+{
+ struct bsc_msg_acc_lst_entry *entry;
+
+ llist_for_each_entry(entry, &lst->fltr_list, list) {
+ if (!entry->imsi_allow)
+ continue;
+ if (regexec(&entry->imsi_allow_re, mi_string, 0, NULL, 0) == 0)
+ return 0;
+ }
+
+ return 1;
+}
+
+struct bsc_msg_acc_lst *bsc_msg_acc_lst_find(struct llist_head *head, const char *name)
+{
+ struct bsc_msg_acc_lst *lst;
+
+ if (!name)
+ return NULL;
+
+ llist_for_each_entry(lst, head, list)
+ if (strcmp(lst->name, name) == 0)
+ return lst;
+
+ return NULL;
+}
+
+struct bsc_msg_acc_lst *bsc_msg_acc_lst_get(void *ctx, struct llist_head *head, const char *name)
+{
+ struct bsc_msg_acc_lst *lst;
+
+ lst = bsc_msg_acc_lst_find(head, name);
+ if (lst)
+ return lst;
+
+ lst = talloc_zero(ctx, struct bsc_msg_acc_lst);
+ if (!lst) {
+ LOGP(DNAT, LOGL_ERROR, "Failed to allocate access list");
+ return NULL;
+ }
+
+ /* TODO: get the index right */
+ lst->stats = rate_ctr_group_alloc(lst, &bsc_cfg_acc_list_desc, 0);
+ if (!lst->stats) {
+ talloc_free(lst);
+ return NULL;
+ }
+
+ INIT_LLIST_HEAD(&lst->fltr_list);
+ lst->name = talloc_strdup(lst, name);
+ llist_add_tail(&lst->list, head);
+ return lst;
+}
+
+void bsc_msg_acc_lst_delete(struct bsc_msg_acc_lst *lst)
+{
+ llist_del(&lst->list);
+ rate_ctr_group_free(lst->stats);
+ talloc_free(lst);
+}
+
+struct bsc_msg_acc_lst_entry *bsc_msg_acc_lst_entry_create(struct bsc_msg_acc_lst *lst)
+{
+ struct bsc_msg_acc_lst_entry *entry;
+
+ entry = talloc_zero(lst, struct bsc_msg_acc_lst_entry);
+ if (!entry)
+ return NULL;
+
+ entry->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
+ entry->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
+ llist_add_tail(&entry->list, &lst->fltr_list);
+ return entry;
+}
+
diff --git a/openbsc/src/libfilter/bsc_msg_filter.c b/openbsc/src/libfilter/bsc_msg_filter.c
new file mode 100644
index 0000000..be518a4
--- /dev/null
+++ b/openbsc/src/libfilter/bsc_msg_filter.c
@@ -0,0 +1,401 @@
+/*
+ * Access filtering
+ */
+/*
+ * (C) 2010-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010-2012 by On-Waves
+ * All Rights Reserved
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <openbsc/bsc_msg_filter.h>
+
+#include <openbsc/bsc_nat.h>
+#include <openbsc/bsc_nat_sccp.h>
+#include <openbsc/bsc_msc.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/debug.h>
+#include <openbsc/ipaccess.h>
+
+#include <osmocom/core/talloc.h>
+#include <osmocom/gsm/gsm0808.h>
+
+#include <osmocom/gsm/protocol/gsm_08_08.h>
+#include <osmocom/gsm/protocol/gsm_04_11.h>
+
+#include <osmocom/sccp/sccp.h>
+
+int bsc_filter_barr_find(struct rb_root *root, const char *imsi, int *cm, int *lu)
+{
+ struct bsc_filter_barr_entry *n;
+ n = rb_entry(root->rb_node, struct bsc_filter_barr_entry, node);
+
+ while (n) {
+ int rc = strcmp(imsi, n->imsi);
+ if (rc == 0) {
+ *cm = n->cm_reject_cause;
+ *lu = n->lu_reject_cause;
+ return 1;
+ }
+
+ n = rb_entry(
+ (rc < 0) ? n->node.rb_left : n->node.rb_right,
+ struct bsc_filter_barr_entry, node);
+ };
+
+ return 0;
+}
+
+static int insert_barr_node(struct bsc_filter_barr_entry *entry, struct rb_root *root)
+{
+ struct rb_node **new = &root->rb_node, *parent = NULL;
+
+ while (*new) {
+ int rc;
+ struct bsc_filter_barr_entry *this;
+ this = rb_entry(*new, struct bsc_filter_barr_entry, node);
+ parent = *new;
+
+ rc = strcmp(entry->imsi, this->imsi);
+ if (rc < 0)
+ new = &((*new)->rb_left);
+ else if (rc > 0)
+ new = &((*new)->rb_right);
+ else {
+ LOGP(DFILTER, LOGL_ERROR,
+ "Duplicate entry for IMSI(%s)\n", entry->imsi);
+ talloc_free(entry);
+ return -1;
+ }
+ }
+
+ rb_link_node(&entry->node, parent, new);
+ rb_insert_color(&entry->node, root);
+ return 0;
+}
+
+int bsc_filter_barr_adapt(void *ctx, struct rb_root *root,
+ const struct osmo_config_list *list)
+{
+ struct osmo_config_entry *cfg_entry;
+ int err = 0;
+
+ /* free the old data */
+ while (!RB_EMPTY_ROOT(root)) {
+ struct rb_node *node = rb_first(root);
+ rb_erase(node, root);
+ talloc_free(node);
+ }
+
+ if (!list)
+ return 0;
+
+ /* now adapt the new list */
+ llist_for_each_entry(cfg_entry, &list->entry, list) {
+ struct bsc_filter_barr_entry *entry;
+ entry = talloc_zero(ctx, struct bsc_filter_barr_entry);
+ if (!entry) {
+ LOGP(DFILTER, LOGL_ERROR,
+ "Allocation of the barr entry failed.\n");
+ continue;
+ }
+
+ entry->imsi = talloc_strdup(entry, cfg_entry->mcc);
+ entry->cm_reject_cause = atoi(cfg_entry->mnc);
+ entry->lu_reject_cause = atoi(cfg_entry->option);
+ err |= insert_barr_node(entry, root);
+ }
+
+ return err;
+}
+
+
+static int lst_check_deny(struct bsc_msg_acc_lst *lst, const char *mi_string,
+ int *cm_cause, int *lu_cause)
+{
+ struct bsc_msg_acc_lst_entry *entry;
+
+ llist_for_each_entry(entry, &lst->fltr_list, list) {
+ if (!entry->imsi_deny)
+ continue;
+ if (regexec(&entry->imsi_deny_re, mi_string, 0, NULL, 0) == 0) {
+ *cm_cause = entry->cm_reject_cause;
+ *lu_cause = entry->lu_reject_cause;
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+/* apply white/black list */
+static int auth_imsi(struct bsc_filter_request *req,
+ const char *imsi,
+ struct bsc_filter_reject_cause *cause)
+{
+ /*
+ * Now apply blacklist/whitelist of the BSC and the NAT.
+ * 1.) Check the global IMSI barr list
+ * 2.) Allow directly if the IMSI is allowed at the BSC
+ * 3.) Reject if the IMSI is not allowed at the BSC
+ * 4.) Reject if the IMSI not allowed at the global level.
+ * 5.) Allow directly if the IMSI is allowed at the global level
+ */
+ int cm, lu;
+ struct bsc_msg_acc_lst *nat_lst = NULL;
+ struct bsc_msg_acc_lst *bsc_lst = NULL;
+
+ /* 1. global check for barred imsis */
+ if (req->black_list && bsc_filter_barr_find(req->black_list, imsi, &cm, &lu)) {
+ cause->cm_reject_cause = cm;
+ cause->lu_reject_cause = lu;
+ LOGP(DFILTER, LOGL_DEBUG,
+ "Blocking subscriber IMSI %s with CM: %d LU: %d\n",
+ imsi, cm, lu);
+ return -4;
+ }
+
+
+ bsc_lst = bsc_msg_acc_lst_find(req->access_lists, req->local_lst_name);
+ nat_lst = bsc_msg_acc_lst_find(req->access_lists, req->global_lst_name);
+
+
+ if (bsc_lst) {
+ /* 2. BSC allow */
+ if (bsc_msg_acc_lst_check_allow(bsc_lst, imsi) == 0)
+ return 1;
+
+ /* 3. BSC deny */
+ if (lst_check_deny(bsc_lst, imsi, &cm, &lu) == 0) {
+ LOGP(DFILTER, LOGL_ERROR,
+ "Filtering %s by imsi_deny on config nr: %d.\n", imsi, req->bsc_nr);
+ rate_ctr_inc(&bsc_lst->stats->ctr[ACC_LIST_LOCAL_FILTER]);
+ cause->cm_reject_cause = cm;
+ cause->lu_reject_cause = lu;
+ return -2;
+ }
+
+ }
+
+ /* 4. NAT deny */
+ if (nat_lst) {
+ if (lst_check_deny(nat_lst, imsi, &cm, &lu) == 0) {
+ LOGP(DFILTER, LOGL_ERROR,
+ "Filtering %s global imsi_deny on bsc nr: %d.\n", imsi, req->bsc_nr);
+ rate_ctr_inc(&nat_lst->stats->ctr[ACC_LIST_GLOBAL_FILTER]);
+ cause->cm_reject_cause = cm;
+ cause->lu_reject_cause = lu;
+ return -3;
+ }
+ }
+
+ return 1;
+}
+
+static int _cr_check_loc_upd(void *ctx,
+ uint8_t *data, unsigned int length,
+ char **imsi)
+{
+ uint8_t mi_type;
+ struct gsm48_loc_upd_req *lu;
+ char mi_string[GSM48_MI_SIZE];
+
+ if (length < sizeof(*lu)) {
+ LOGP(DFILTER, LOGL_ERROR,
+ "LU does not fit. Length is %d \n", length);
+ return -1;
+ }
+
+ lu = (struct gsm48_loc_upd_req *) data;
+ mi_type = lu->mi[0] & GSM_MI_TYPE_MASK;
+
+ /*
+ * We can only deal with the IMSI. This will fail for a phone that
+ * will send the TMSI of a previous network to us.
+ */
+ if (mi_type != GSM_MI_TYPE_IMSI)
+ return 0;
+
+ gsm48_mi_to_string(mi_string, sizeof(mi_string), lu->mi, lu->mi_len);
+ *imsi = talloc_strdup(ctx, mi_string);
+ return 1;
+}
+
+static int _cr_check_cm_serv_req(void *ctx,
+ uint8_t *data, unsigned int length,
+ int *con_type, char **imsi)
+{
+ static const uint32_t classmark_offset =
+ offsetof(struct gsm48_service_request, classmark);
+
+ char mi_string[GSM48_MI_SIZE];
+ uint8_t mi_type;
+ int rc;
+ struct gsm48_service_request *req;
+
+ /* unfortunately in Phase1 the classmark2 length is variable */
+
+ if (length < sizeof(*req)) {
+ LOGP(DFILTER, LOGL_ERROR,
+ "CM Serv Req does not fit. Length is %d\n", length);
+ return -1;
+ }
+
+ req = (struct gsm48_service_request *) data;
+ if (req->cm_service_type == 0x8)
+ *con_type = FLT_CON_TYPE_SSA;
+ rc = gsm48_extract_mi((uint8_t *) &req->classmark,
+ length - classmark_offset, mi_string, &mi_type);
+ if (rc < 0) {
+ LOGP(DFILTER, LOGL_ERROR, "Failed to parse the classmark2/mi. error: %d\n", rc);
+ return -1;
+ }
+
+ /* we have to let the TMSI or such pass */
+ if (mi_type != GSM_MI_TYPE_IMSI)
+ return 0;
+
+ *imsi = talloc_strdup(ctx, mi_string);
+ return 1;
+}
+
+static int _cr_check_pag_resp(void *ctx,
+ uint8_t *data, unsigned int length, char **imsi)
+{
+ struct gsm48_pag_resp *resp;
+ char mi_string[GSM48_MI_SIZE];
+ uint8_t mi_type;
+
+ if (length < sizeof(*resp)) {
+ LOGP(DFILTER, LOGL_ERROR, "PAG RESP does not fit. Length was %d.\n", length);
+ return -1;
+ }
+
+ resp = (struct gsm48_pag_resp *) data;
+ if (gsm48_paging_extract_mi(resp, length, mi_string, &mi_type) < 0) {
+ LOGP(DFILTER, LOGL_ERROR, "Failed to extract the MI.\n");
+ return -1;
+ }
+
+ /* we need to let it pass for now */
+ if (mi_type != GSM_MI_TYPE_IMSI)
+ return 0;
+
+ *imsi = talloc_strdup(ctx, mi_string);
+ return 1;
+}
+
+static int _dt_check_id_resp(struct bsc_filter_request *req,
+ uint8_t *data, unsigned int length,
+ struct bsc_filter_state *state,
+ struct bsc_filter_reject_cause *cause)
+{
+ char mi_string[GSM48_MI_SIZE];
+ uint8_t mi_type;
+
+ if (length < 2) {
+ LOGP(DFILTER, LOGL_ERROR, "mi does not fit.\n");
+ return -1;
+ }
+
+ if (data[0] < length - 1) {
+ LOGP(DFILTER, LOGL_ERROR, "mi length too big.\n");
+ return -2;
+ }
+
+ mi_type = data[1] & GSM_MI_TYPE_MASK;
+ gsm48_mi_to_string(mi_string, sizeof(mi_string), &data[1], data[0]);
+
+ if (mi_type != GSM_MI_TYPE_IMSI)
+ return 0;
+
+ state->imsi_checked = 1;
+ state->imsi = talloc_strdup(req->ctx, mi_string);
+ return auth_imsi(req, mi_string, cause);
+}
+
+
+/* Filter out CR data... */
+int bsc_msg_filter_initial(struct gsm48_hdr *hdr48, size_t hdr48_len,
+ struct bsc_filter_request *req,
+ int *con_type,
+ char **imsi, struct bsc_filter_reject_cause *cause)
+{
+ int ret = 0;
+ uint8_t msg_type, proto;
+
+ *con_type = FLT_CON_TYPE_NONE;
+ cause->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
+ cause->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
+ *imsi = NULL;
+
+ proto = hdr48->proto_discr & 0x0f;
+ msg_type = hdr48->msg_type & 0xbf;
+ if (proto == GSM48_PDISC_MM &&
+ msg_type == GSM48_MT_MM_LOC_UPD_REQUEST) {
+ *con_type = FLT_CON_TYPE_LU;
+ ret = _cr_check_loc_upd(req->ctx, &hdr48->data[0],
+ hdr48_len - sizeof(*hdr48), imsi);
+ } else if (proto == GSM48_PDISC_MM &&
+ msg_type == GSM48_MT_MM_CM_SERV_REQ) {
+ *con_type = FLT_CON_TYPE_CM_SERV_REQ;
+ ret = _cr_check_cm_serv_req(req->ctx, &hdr48->data[0],
+ hdr48_len - sizeof(*hdr48),
+ con_type, imsi);
+ } else if (proto == GSM48_PDISC_RR &&
+ msg_type == GSM48_MT_RR_PAG_RESP) {
+ *con_type = FLT_CON_TYPE_PAG_RESP;
+ ret = _cr_check_pag_resp(req->ctx, &hdr48->data[0],
+ hdr48_len - sizeof(*hdr48), imsi);
+ } else {
+ /* We only want to filter the above, let other things pass */
+ *con_type = FLT_CON_TYPE_OTHER;
+ return 0;
+ }
+
+ /* check if we are done */
+ if (ret != 1)
+ return ret;
+
+ /* the memory allocation failed */
+ if (!*imsi)
+ return -1;
+
+ /* now check the imsi */
+ return auth_imsi(req, *imsi, cause);
+}
+
+int bsc_msg_filter_data(struct gsm48_hdr *hdr48, size_t len,
+ struct bsc_filter_request *req,
+ struct bsc_filter_state *state,
+ struct bsc_filter_reject_cause *cause)
+{
+ uint8_t msg_type, proto;
+
+ cause->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
+ cause->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
+
+ if (state->imsi_checked)
+ return 0;
+
+ proto = hdr48->proto_discr & 0x0f;
+ msg_type = hdr48->msg_type & 0xbf;
+ if (proto != GSM48_PDISC_MM || msg_type != GSM48_MT_MM_ID_RESP)
+ return 0;
+
+ return _dt_check_id_resp(req, &hdr48->data[0],
+ len - sizeof(*hdr48), state, cause);
+}
diff --git a/openbsc/src/libfilter/bsc_msg_vty.c b/openbsc/src/libfilter/bsc_msg_vty.c
new file mode 100644
index 0000000..c342fdc
--- /dev/null
+++ b/openbsc/src/libfilter/bsc_msg_vty.c
@@ -0,0 +1,140 @@
+/* (C) 2010-2015 by Holger Hans Peter Freyther
+ * (C) 2010-2013 by On-Waves
+ * All Rights Reserved
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <openbsc/bsc_msg_filter.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/vty.h>
+
+#include <osmocom/vty/misc.h>
+
+static struct llist_head *_acc_lst;
+static void *_ctx;
+
+DEFUN(cfg_lst_no,
+ cfg_lst_no_cmd,
+ "no access-list NAME",
+ NO_STR "Remove an access-list by name\n"
+ "The access-list to remove\n")
+{
+ struct bsc_msg_acc_lst *acc;
+ acc = bsc_msg_acc_lst_find(_acc_lst, argv[0]);
+ if (!acc)
+ return CMD_WARNING;
+
+ bsc_msg_acc_lst_delete(acc);
+ return CMD_SUCCESS;
+}
+
+DEFUN(show_acc_lst,
+ show_acc_lst_cmd,
+ "show access-list NAME",
+ SHOW_STR "IMSI access list\n" "Name of the access list\n")
+{
+ struct bsc_msg_acc_lst *acc;
+ acc = bsc_msg_acc_lst_find(_acc_lst, argv[0]);
+ if (!acc)
+ return CMD_WARNING;
+
+ vty_out(vty, "access-list %s%s", acc->name, VTY_NEWLINE);
+ vty_out_rate_ctr_group(vty, " ", acc->stats);
+
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_lst_imsi_allow,
+ cfg_lst_imsi_allow_cmd,
+ "access-list NAME imsi-allow [REGEXP]",
+ "Access list commands\n"
+ "Name of the access list\n"
+ "Add allowed IMSI to the list\n"
+ "Regexp for IMSIs\n")
+{
+ struct bsc_msg_acc_lst *acc;
+ struct bsc_msg_acc_lst_entry *entry;
+
+ acc = bsc_msg_acc_lst_get(_ctx, _acc_lst, argv[0]);
+ if (!acc)
+ return CMD_WARNING;
+
+ entry = bsc_msg_acc_lst_entry_create(acc);
+ if (!entry)
+ return CMD_WARNING;
+
+ if (gsm_parse_reg(acc, &entry->imsi_allow_re, &entry->imsi_allow, argc - 1, &argv[1]) != 0)
+ return CMD_WARNING;
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_lst_imsi_deny,
+ cfg_lst_imsi_deny_cmd,
+ "access-list NAME imsi-deny [REGEXP] (<0-256>) (<0-256>)",
+ "Access list commands\n"
+ "Name of the access list\n"
+ "Add denied IMSI to the list\n"
+ "Regexp for IMSIs\n"
+ "CM Service Reject reason\n"
+ "LU Reject reason\n")
+{
+ struct bsc_msg_acc_lst *acc;
+ struct bsc_msg_acc_lst_entry *entry;
+
+ acc = bsc_msg_acc_lst_get(_ctx, _acc_lst, argv[0]);
+ if (!acc)
+ return CMD_WARNING;
+
+ entry = bsc_msg_acc_lst_entry_create(acc);
+ if (!entry)
+ return CMD_WARNING;
+
+ if (gsm_parse_reg(acc, &entry->imsi_deny_re, &entry->imsi_deny, argc - 1, &argv[1]) != 0)
+ return CMD_WARNING;
+ if (argc >= 3)
+ entry->cm_reject_cause = atoi(argv[2]);
+ if (argc >= 4)
+ entry->lu_reject_cause = atoi(argv[3]);
+ return CMD_SUCCESS;
+}
+
+void bsc_msg_acc_lst_write(struct vty *vty, struct bsc_msg_acc_lst *lst)
+{
+ struct bsc_msg_acc_lst_entry *entry;
+
+ llist_for_each_entry(entry, &lst->fltr_list, list) {
+ if (entry->imsi_allow)
+ vty_out(vty, " access-list %s imsi-allow %s%s",
+ lst->name, entry->imsi_allow, VTY_NEWLINE);
+ if (entry->imsi_deny)
+ vty_out(vty, " access-list %s imsi-deny %s %d %d%s",
+ lst->name, entry->imsi_deny,
+ entry->cm_reject_cause, entry->lu_reject_cause,
+ VTY_NEWLINE);
+ }
+}
+
+void bsc_msg_lst_vty_init(void *ctx, struct llist_head *lst, int node)
+{
+ _ctx = ctx;
+ _acc_lst = lst;
+ install_element_ve(&show_acc_lst_cmd);
+
+ /* access-list */
+ install_element(node, &cfg_lst_imsi_allow_cmd);
+ install_element(node, &cfg_lst_imsi_deny_cmd);
+ install_element(node, &cfg_lst_no_cmd);
+}
diff --git a/openbsc/src/osmo-bsc/Makefile.am b/openbsc/src/osmo-bsc/Makefile.am
index 6248fcd..b4a2cba 100644
--- a/openbsc/src/osmo-bsc/Makefile.am
+++ b/openbsc/src/osmo-bsc/Makefile.am
@@ -9,7 +9,9 @@ osmo_bsc_SOURCES = osmo_bsc_main.c osmo_bsc_vty.c osmo_bsc_api.c \
osmo_bsc_grace.c osmo_bsc_msc.c osmo_bsc_sccp.c \
osmo_bsc_filter.c osmo_bsc_bssap.c osmo_bsc_audio.c osmo_bsc_ctrl.c
# once again since TRAU uses CC symbol :(
-osmo_bsc_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+osmo_bsc_LDADD = \
+ $(top_builddir)/src/libfilter/libfilter.a \
+ $(top_builddir)/src/libbsc/libbsc.a \
$(top_builddir)/src/libmsc/libmsc.a \
$(top_builddir)/src/libbsc/libbsc.a \
$(top_builddir)/src/libtrau/libtrau.a \
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_api.c b/openbsc/src/osmo-bsc/osmo_bsc_api.c
index 18b9607..5a01d6b 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_api.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_api.c
@@ -1,4 +1,4 @@
-/* (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
+/* (C) 2009-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2011 by On-Waves
* All Rights Reserved
*
@@ -79,6 +79,69 @@ static uint16_t get_ci_for_msc(struct osmo_msc_data *msc, struct gsm_bts *bts)
return bts->cell_identity;
}
+static void bsc_maybe_lu_reject(struct gsm_subscriber_connection *conn, int con_type, int cause)
+{
+ struct msgb *msg;
+
+ /* ignore cm service request or such */
+ if (con_type != FLT_CON_TYPE_LU)
+ return;
+
+ msg = gsm48_create_loc_upd_rej(cause);
+ if (!msg) {
+ LOGP(DMM, LOGL_ERROR, "Failed to create msg for LOCATION UPDATING REJECT.\n");
+ return;
+ }
+
+ msg->lchan = conn->lchan;
+ gsm0808_submit_dtap(conn, msg, 0, 0);
+}
+
+static int bsc_filter_initial(struct osmo_bsc_data *bsc,
+ struct osmo_msc_data *msc,
+ struct gsm_subscriber_connection *conn,
+ struct msgb *msg, char **imsi, int *con_type,
+ int *lu_cause)
+{
+ struct bsc_filter_request req;
+ struct bsc_filter_reject_cause cause;
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ int rc;
+
+ req.ctx = conn;
+ req.black_list = NULL;
+ req.access_lists = bsc_access_lists();
+ req.local_lst_name = msc->acc_lst_name;
+ req.global_lst_name = conn->bts->network->bsc_data->acc_lst_name;
+ req.bsc_nr = 0;
+
+ rc = bsc_msg_filter_initial(gh, msgb_l3len(msg), &req,
+ con_type, imsi, &cause);
+ *lu_cause = cause.lu_reject_cause;
+ return rc;
+}
+
+static int bsc_filter_data(struct gsm_subscriber_connection *conn,
+ struct msgb *msg, int *lu_cause)
+{
+ struct bsc_filter_request req;
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ struct bsc_filter_reject_cause cause;
+ int rc;
+
+ req.ctx = conn;
+ req.black_list = NULL;
+ req.access_lists = bsc_access_lists();
+ req.local_lst_name = conn->sccp_con->msc->acc_lst_name;
+ req.global_lst_name = conn->bts->network->bsc_data->acc_lst_name;
+ req.bsc_nr = 0;
+
+ rc = bsc_msg_filter_data(gh, msgb_l3len(msg), &req,
+ &conn->sccp_con->filter_state,
+ &cause);
+ *lu_cause = cause.lu_reject_cause;
+ return rc;
+}
static void bsc_sapi_n_reject(struct gsm_subscriber_connection *conn, int dlci)
{
@@ -172,6 +235,8 @@ static int bsc_compl_l3(struct gsm_subscriber_connection *conn, struct msgb *msg
static int complete_layer3(struct gsm_subscriber_connection *conn,
struct msgb *msg, struct osmo_msc_data *msc)
{
+ int con_type, rc, lu_cause;
+ char *imsi = NULL;
struct timeval tv;
struct msgb *resp;
uint16_t network_code;
@@ -189,6 +254,14 @@ static int complete_layer3(struct gsm_subscriber_connection *conn,
if (send_ping && osmo_timer_remaining(&msc->ping_timer, NULL, &tv) == -1)
send_ping = 0;
+ /* Check the filter */
+ rc = bsc_filter_initial(msc->network->bsc_data, msc, conn, msg,
+ &imsi, &con_type, &lu_cause);
+ if (rc < 0) {
+ bsc_maybe_lu_reject(conn, con_type, lu_cause);
+ return BSC_API_CONN_POL_REJECT;
+ }
+
/* allocate resource for a new connection */
ret = bsc_create_new_connection(conn, msc, send_ping);
@@ -202,6 +275,10 @@ static int complete_layer3(struct gsm_subscriber_connection *conn,
return BSC_API_CONN_POL_REJECT;
}
+ if (imsi)
+ conn->sccp_con->filter_state.imsi = talloc_steal(conn, imsi);
+ conn->sccp_con->filter_state.con_type = con_type;
+
/* check return value, if failed check msg for and send USSD */
network_code = get_network_code_for_msc(conn->sccp_con->msc);
@@ -210,6 +287,7 @@ static int complete_layer3(struct gsm_subscriber_connection *conn,
ci = get_ci_for_msc(conn->sccp_con->msc, conn->bts);
bsc_scan_bts_msg(conn, msg);
+
resp = gsm0808_create_layer3(msg, network_code, country_code, lac, ci);
if (!resp) {
LOGP(DMSC, LOGL_DEBUG, "Failed to create layer3 message.\n");
@@ -320,6 +398,7 @@ static int handle_cc_setup(struct gsm_subscriber_connection *conn,
static void bsc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id, struct msgb *msg)
{
+ int lu_cause;
struct msgb *resp;
return_when_not_connected(conn);
@@ -332,8 +411,16 @@ static void bsc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id, st
if (handle_cc_setup(conn, msg) >= 1)
return;
- bsc_scan_bts_msg(conn, msg);
+ /* Check the filter */
+ if (bsc_filter_data(conn, msg, &lu_cause) < 0) {
+ bsc_maybe_lu_reject(conn,
+ conn->sccp_con->filter_state.con_type,
+ lu_cause);
+ bsc_clear_request(conn, 0);
+ return;
+ }
+ bsc_scan_bts_msg(conn, msg);
resp = gsm0808_create_dtap(msg, link_id);
queue_msg_or_return(resp);
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_main.c b/openbsc/src/osmo-bsc/osmo_bsc_main.c
index 5c38855..ee86cb6 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_main.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_main.c
@@ -59,6 +59,12 @@ static const char *config_file = "openbsc.cfg";
static const char *rf_ctrl = NULL;
extern const char *openbsc_copyright;
static int daemonize = 0;
+static struct llist_head access_lists;
+
+struct llist_head *bsc_access_lists(void)
+{
+ return &access_lists;
+}
static void print_usage()
{
@@ -196,6 +202,9 @@ int main(int argc, char **argv)
vty_info.copyright = openbsc_copyright;
vty_init(&vty_info);
bsc_vty_init(&log_info);
+ bsc_msg_lst_vty_init(tall_bsc_ctx, &access_lists, BSC_NODE);
+
+ INIT_LLIST_HEAD(&access_lists);
/* parse options */
handle_options(argc, argv);
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_vty.c b/openbsc/src/osmo-bsc/osmo_bsc_vty.c
index bbbba1c..06ad77d 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_vty.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_vty.c
@@ -1,5 +1,5 @@
/* Osmo BSC VTY Configuration */
-/* (C) 2009-2014 by Holger Hans Peter Freyther
+/* (C) 2009-2015 by Holger Hans Peter Freyther
* (C) 2009-2014 by On-Waves
* All Rights Reserved
*
@@ -24,6 +24,7 @@
#include <openbsc/vty.h>
#include <openbsc/gsm_subscriber.h>
#include <openbsc/debug.h>
+#include <openbsc/bsc_msg_filter.h>
#include <osmocom/core/talloc.h>
#include <osmocom/vty/logging.h>
@@ -175,6 +176,9 @@ static void write_msc(struct vty *vty, struct osmo_msc_data *msc)
if (msc->local_pref)
vty_out(vty, " local-prefix %s%s", msc->local_pref, VTY_NEWLINE);
+ if (msc->acc_lst_name)
+ vty_out(vty, " access-list-name %s%s", msc->acc_lst_name, VTY_NEWLINE);
+
/* write amr options */
write_msc_amr_options(vty, msc);
}
@@ -210,6 +214,8 @@ static int config_write_bsc(struct vty *vty)
vty_out(vty, " missing-msc-text %s%s", bsc->ussd_no_msc_txt, VTY_NEWLINE);
else
vty_out(vty, " no missing-msc-text%s", VTY_NEWLINE);
+ if (bsc->acc_lst_name)
+ vty_out(vty, " access-list-name %s%s", bsc->acc_lst_name, VTY_NEWLINE);
return CMD_SUCCESS;
}
@@ -625,6 +631,33 @@ AMR_COMMAND(5_90)
AMR_COMMAND(5_15)
AMR_COMMAND(4_75)
+DEFUN(cfg_msc_acc_lst_name,
+ cfg_msc_acc_lst_name_cmd,
+ "access-list-name NAME",
+ "Set the name of the access list to use.\n"
+ "The name of the to be used access list.")
+{
+ struct osmo_msc_data *msc = osmo_msc_data(vty);
+
+ bsc_replace_string(msc, &msc->acc_lst_name, argv[0]);
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_msc_no_acc_lst_name,
+ cfg_msc_no_acc_lst_name_cmd,
+ "no access-list-name",
+ NO_STR "Remove the access list from the NAT.\n")
+{
+ struct osmo_msc_data *msc = osmo_msc_data(vty);
+
+ if (msc->acc_lst_name) {
+ talloc_free(msc->acc_lst_name);
+ msc->acc_lst_name = NULL;
+ }
+
+ return CMD_SUCCESS;
+}
+
DEFUN(cfg_net_bsc_mid_call_text,
cfg_net_bsc_mid_call_text_cmd,
"mid-call-text .TEXT",
@@ -681,6 +714,33 @@ DEFUN(cfg_net_no_rf_off_time,
return CMD_SUCCESS;
}
+DEFUN(cfg_bsc_acc_lst_name,
+ cfg_bsc_acc_lst_name_cmd,
+ "access-list-name NAME",
+ "Set the name of the access list to use.\n"
+ "The name of the to be used access list.")
+{
+ struct osmo_bsc_data *bsc = osmo_bsc_data(vty);
+
+ bsc_replace_string(bsc, &bsc->acc_lst_name, argv[0]);
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_bsc_no_acc_lst_name,
+ cfg_bsc_no_acc_lst_name_cmd,
+ "no access-list-name",
+ NO_STR "Remove the access list from the BSC\n")
+{
+ struct osmo_bsc_data *bsc = osmo_bsc_data(vty);
+
+ if (bsc->acc_lst_name) {
+ talloc_free(bsc->acc_lst_name);
+ bsc->acc_lst_name = NULL;
+ }
+
+ return CMD_SUCCESS;
+}
+
DEFUN(show_statistics,
show_statistics_cmd,
"show statistics",
@@ -805,6 +865,8 @@ int bsc_vty_init_extra(void)
install_element(BSC_NODE, &cfg_net_no_rf_off_time_cmd);
install_element(BSC_NODE, &cfg_net_bsc_missing_msc_ussd_cmd);
install_element(BSC_NODE, &cfg_net_bsc_no_missing_msc_text_cmd);
+ install_element(BSC_NODE, &cfg_bsc_acc_lst_name_cmd);
+ install_element(BSC_NODE, &cfg_bsc_no_acc_lst_name_cmd);
install_node(&msc_node, config_write_msc);
vty_install_default(MSC_NODE);
@@ -839,6 +901,8 @@ int bsc_vty_init_extra(void)
install_element(MSC_NODE, &cfg_net_msc_amr_5_90_cmd);
install_element(MSC_NODE, &cfg_net_msc_amr_5_15_cmd);
install_element(MSC_NODE, &cfg_net_msc_amr_4_75_cmd);
+ install_element(MSC_NODE, &cfg_msc_acc_lst_name_cmd);
+ install_element(MSC_NODE, &cfg_msc_no_acc_lst_name_cmd);
install_element_ve(&show_statistics_cmd);
install_element_ve(&show_mscs_cmd);
diff --git a/openbsc/src/osmo-bsc_nat/Makefile.am b/openbsc/src/osmo-bsc_nat/Makefile.am
index ca103a4..d96a391 100644
--- a/openbsc/src/osmo-bsc_nat/Makefile.am
+++ b/openbsc/src/osmo-bsc_nat/Makefile.am
@@ -7,12 +7,13 @@ bin_PROGRAMS = osmo-bsc_nat
osmo_bsc_nat_SOURCES = bsc_filter.c bsc_mgcp_utils.c bsc_nat.c bsc_nat_utils.c \
bsc_nat_vty.c bsc_sccp.c bsc_ussd.c bsc_nat_ctrl.c \
- bsc_nat_rewrite.c bsc_nat_filter.c bsc_nat_rewrite_trie.c
+ bsc_nat_rewrite.c bsc_nat_rewrite_trie.c bsc_nat_filter.c
osmo_bsc_nat_LDADD = \
$(top_builddir)/src/libmgcp/libmgcp.a \
$(top_builddir)/src/libbsc/libbsc.a \
$(top_builddir)/src/libtrau/libtrau.a \
$(top_builddir)/src/libcommon/libcommon.a \
+ $(top_builddir)/src/libfilter/libfilter.a \
-lrt $(LIBOSMOSCCP_LIBS) $(LIBOSMOCORE_LIBS) \
$(LIBOSMOGSM_LIBS) $(LIBOSMOVTY_LIBS) $(LIBOSMOCTRL_LIBS) \
$(LIBOSMOABIS_LIBS) $(LIBOSMONETIF_LIBS)
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat.c b/openbsc/src/osmo-bsc_nat/bsc_nat.c
index 5c3b696..4357485 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat.c
@@ -39,6 +39,7 @@
#include <openbsc/bsc_msc.h>
#include <openbsc/bsc_nat.h>
#include <openbsc/bsc_nat_sccp.h>
+#include <openbsc/bsc_msg_filter.h>
#include <openbsc/ipaccess.h>
#include <openbsc/abis_nm.h>
#include <openbsc/socket.h>
@@ -425,7 +426,7 @@ static void bsc_stat_reject(int filter, struct bsc_connection *bsc, int normal)
*/
static void bsc_send_con_release(struct bsc_connection *bsc,
struct nat_sccp_connection *con,
- struct bsc_nat_reject_cause *cause)
+ struct bsc_filter_reject_cause *cause)
{
struct msgb *rlsd;
/* 1. release the network */
@@ -441,7 +442,7 @@ static void bsc_send_con_release(struct bsc_connection *bsc,
con->msc_con = NULL;
/* 2. release the BSC side */
- if (con->con_type == NAT_CON_TYPE_LU) {
+ if (con->filter_state.con_type == FLT_CON_TYPE_LU) {
struct msgb *payload, *udt;
payload = gsm48_create_loc_upd_rej(cause->lu_reject_cause);
@@ -469,20 +470,20 @@ static void bsc_send_con_release(struct bsc_connection *bsc,
return;
}
- con->con_type = NAT_CON_TYPE_LOCAL_REJECT;
+ con->filter_state.con_type = FLT_CON_TYPE_LOCAL_REJECT;
bsc_write(bsc, rlsd, IPAC_PROTO_SCCP);
}
static void bsc_send_con_refuse(struct bsc_connection *bsc,
struct bsc_nat_parsed *parsed, int con_type,
- struct bsc_nat_reject_cause *cause)
+ struct bsc_filter_reject_cause *cause)
{
struct msgb *payload;
struct msgb *refuse;
- if (con_type == NAT_CON_TYPE_LU)
+ if (con_type == FLT_CON_TYPE_LU)
payload = gsm48_create_loc_upd_rej(cause->lu_reject_cause);
- else if (con_type == NAT_CON_TYPE_CM_SERV_REQ || con_type == NAT_CON_TYPE_SSA)
+ else if (con_type == FLT_CON_TYPE_CM_SERV_REQ || con_type == FLT_CON_TYPE_SSA)
payload = gsm48_create_mm_serv_rej(cause->cm_reject_cause);
else {
LOGP(DNAT, LOGL_ERROR, "Unknown connection type: %d\n", con_type);
@@ -503,7 +504,7 @@ static void bsc_send_con_refuse(struct bsc_connection *bsc,
goto send_refuse;
/* declare it local and assign a unique remote_ref */
- con->con_type = NAT_CON_TYPE_LOCAL_REJECT;
+ con->filter_state.con_type = FLT_CON_TYPE_LOCAL_REJECT;
con->con_local = NAT_CON_END_LOCAL;
con->has_remote_ref = 1;
con->remote_ref = con->patched_ref;
@@ -1025,7 +1026,7 @@ static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg)
struct bsc_connection *con_bsc = NULL;
int con_type;
struct bsc_nat_parsed *parsed;
- struct bsc_nat_reject_cause cause;
+ struct bsc_filter_reject_cause cause;
/* Parse and filter messages */
parsed = bsc_nat_parse(msg);
@@ -1071,11 +1072,11 @@ static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg)
con = patch_sccp_src_ref_to_msc(msg, parsed, bsc);
con->msc_con = bsc->nat->msc_con;
con_msc = con->msc_con;
- con->con_type = con_type;
- con->imsi_checked = filter;
+ con->filter_state.con_type = con_type;
+ con->filter_state.imsi_checked = filter;
bsc_nat_extract_lac(bsc, con, parsed, msg);
if (imsi)
- con->imsi = talloc_steal(con, imsi);
+ con->filter_state.imsi = talloc_steal(con, imsi);
imsi = NULL;
con_bsc = con->bsc;
handle_con_stats(con);
@@ -1093,8 +1094,9 @@ static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg)
filter = bsc_nat_filter_dt(bsc, msg,
con, parsed, &cause);
if (filter < 0) {
- if (con->imsi)
- bsc_nat_inform_reject(bsc, con->imsi);
+ if (con->filter_state.imsi)
+ bsc_nat_inform_reject(bsc,
+ con->filter_state.imsi);
bsc_stat_reject(filter, bsc, 1);
bsc_send_con_release(bsc, con, &cause);
con = NULL;
@@ -1110,7 +1112,8 @@ static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg)
* replace the msg and the parsed structure becomes
* invalid.
*/
- msg = bsc_nat_rewrite_msg(bsc->nat, msg, parsed, con->imsi);
+ msg = bsc_nat_rewrite_msg(bsc->nat, msg, parsed,
+ con->filter_state.imsi);
talloc_free(parsed);
parsed = NULL;
} else if (con->con_local == NAT_CON_END_USSD) {
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_ctrl.c b/openbsc/src/osmo-bsc_nat/bsc_nat_ctrl.c
index 4b59b40..f3ca924 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_ctrl.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_ctrl.c
@@ -29,6 +29,7 @@
#include <openbsc/ctrl.h>
#include <openbsc/bsc_nat.h>
+#include <openbsc/bsc_msg_filter.h>
#include <openbsc/vty.h>
#include <openbsc/gsm_data.h>
@@ -404,19 +405,19 @@ static int get_net_cfg_acc_cmd(struct ctrl_cmd *cmd, void *data)
static int set_net_cfg_acc_cmd(struct ctrl_cmd *cmd, void *data)
{
const char *access_name = extract_acc_name(cmd->variable);
- struct bsc_nat_acc_lst *acc;
- struct bsc_nat_acc_lst_entry *entry;
+ struct bsc_msg_acc_lst *acc;
+ struct bsc_msg_acc_lst_entry *entry;
const char *value = cmd->value;
int rc;
/* Should have been caught by verify_net_cfg_acc_cmd */
- acc = bsc_nat_acc_lst_find(g_nat, access_name);
+ acc = bsc_msg_acc_lst_find(&g_nat->access_lists, access_name);
if (!acc) {
cmd->reply = "Access list not found";
return CTRL_CMD_ERROR;
}
- entry = bsc_nat_acc_lst_entry_create(acc);
+ entry = bsc_msg_acc_lst_entry_create(acc);
if (!entry) {
cmd->reply = "OOM";
return CTRL_CMD_ERROR;
@@ -435,7 +436,7 @@ static int set_net_cfg_acc_cmd(struct ctrl_cmd *cmd, void *data)
static int verify_net_cfg_acc_cmd(struct ctrl_cmd *cmd, const char *value, void *data)
{
const char *access_name = extract_acc_name(cmd->variable);
- struct bsc_nat_acc_lst *acc = bsc_nat_acc_lst_find(g_nat, access_name);
+ struct bsc_msg_acc_lst *acc = bsc_msg_acc_lst_find(&g_nat->access_lists, access_name);
if (!acc) {
cmd->reply = "Access list not known";
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_filter.c b/openbsc/src/osmo-bsc_nat/bsc_nat_filter.c
index 64f6d73..393aea3 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_filter.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_filter.c
@@ -1,8 +1,5 @@
/*
- * Access filtering
- */
-/*
- * (C) 2010-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010-2012 by On-Waves
* All Rights Reserved
*
@@ -23,13 +20,9 @@
#include <openbsc/bsc_nat.h>
#include <openbsc/bsc_nat_sccp.h>
-#include <openbsc/bsc_msc.h>
-#include <openbsc/gsm_data.h>
+#include <openbsc/bsc_msg_filter.h>
#include <openbsc/debug.h>
-#include <openbsc/ipaccess.h>
-#include <osmocom/core/linuxlist.h>
-#include <osmocom/core/talloc.h>
#include <osmocom/gsm/gsm0808.h>
#include <osmocom/gsm/protocol/gsm_08_08.h>
@@ -37,307 +30,18 @@
#include <osmocom/sccp/sccp.h>
-int bsc_nat_barr_find(struct rb_root *root, const char *imsi, int *cm, int *lu)
-{
- struct bsc_nat_barr_entry *n;
- n = rb_entry(root->rb_node, struct bsc_nat_barr_entry, node);
-
- while (n) {
- int rc = strcmp(imsi, n->imsi);
- if (rc == 0) {
- *cm = n->cm_reject_cause;
- *lu = n->lu_reject_cause;
- return 1;
- }
-
- n = rb_entry(
- (rc < 0) ? n->node.rb_left : n->node.rb_right,
- struct bsc_nat_barr_entry, node);
- };
-
- return 0;
-}
-
-static int insert_barr_node(struct bsc_nat_barr_entry *entry, struct rb_root *root)
-{
- struct rb_node **new = &root->rb_node, *parent = NULL;
-
- while (*new) {
- int rc;
- struct bsc_nat_barr_entry *this;
- this = rb_entry(*new, struct bsc_nat_barr_entry, node);
- parent = *new;
-
- rc = strcmp(entry->imsi, this->imsi);
- if (rc < 0)
- new = &((*new)->rb_left);
- else if (rc > 0)
- new = &((*new)->rb_right);
- else {
- LOGP(DNAT, LOGL_ERROR,
- "Duplicate entry for IMSI(%s)\n", entry->imsi);
- talloc_free(entry);
- return -1;
- }
- }
-
- rb_link_node(&entry->node, parent, new);
- rb_insert_color(&entry->node, root);
- return 0;
-}
-
-int bsc_nat_barr_adapt(void *ctx, struct rb_root *root,
- const struct osmo_config_list *list)
-{
- struct osmo_config_entry *cfg_entry;
- int err = 0;
-
- /* free the old data */
- while (!RB_EMPTY_ROOT(root)) {
- struct rb_node *node = rb_first(root);
- rb_erase(node, root);
- talloc_free(node);
- }
-
- if (!list)
- return 0;
-
- /* now adapt the new list */
- llist_for_each_entry(cfg_entry, &list->entry, list) {
- struct bsc_nat_barr_entry *entry;
- entry = talloc_zero(ctx, struct bsc_nat_barr_entry);
- if (!entry) {
- LOGP(DNAT, LOGL_ERROR,
- "Allocation of the barr entry failed.\n");
- continue;
- }
-
- entry->imsi = talloc_strdup(entry, cfg_entry->mcc);
- entry->cm_reject_cause = atoi(cfg_entry->mnc);
- entry->lu_reject_cause = atoi(cfg_entry->option);
- err |= insert_barr_node(entry, root);
- }
-
- return err;
-}
-
-
-static int lst_check_deny(struct bsc_nat_acc_lst *lst, const char *mi_string,
- int *cm_cause, int *lu_cause)
-{
- struct bsc_nat_acc_lst_entry *entry;
-
- llist_for_each_entry(entry, &lst->fltr_list, list) {
- if (!entry->imsi_deny)
- continue;
- if (regexec(&entry->imsi_deny_re, mi_string, 0, NULL, 0) == 0) {
- *cm_cause = entry->cm_reject_cause;
- *lu_cause = entry->lu_reject_cause;
- return 0;
- }
- }
-
- return 1;
-}
-
-/* apply white/black list */
-static int auth_imsi(struct bsc_connection *bsc, const char *imsi,
- struct bsc_nat_reject_cause *cause)
-{
- /*
- * Now apply blacklist/whitelist of the BSC and the NAT.
- * 1.) Check the global IMSI barr list
- * 2.) Allow directly if the IMSI is allowed at the BSC
- * 3.) Reject if the IMSI is not allowed at the BSC
- * 4.) Reject if the IMSI not allowed at the global level.
- * 5.) Allow directly if the IMSI is allowed at the global level
- */
- int cm, lu;
- struct bsc_nat_acc_lst *nat_lst = NULL;
- struct bsc_nat_acc_lst *bsc_lst = NULL;
-
- /* 1. global check for barred imsis */
- if (bsc_nat_barr_find(&bsc->nat->imsi_black_list, imsi, &cm, &lu)) {
- cause->cm_reject_cause = cm;
- cause->lu_reject_cause = lu;
- LOGP(DNAT, LOGL_DEBUG,
- "Blocking subscriber IMSI %s with CM: %d LU: %d\n",
- imsi, cm, lu);
- return -4;
- }
-
-
- bsc_lst = bsc_nat_acc_lst_find(bsc->nat, bsc->cfg->acc_lst_name);
- nat_lst = bsc_nat_acc_lst_find(bsc->nat, bsc->nat->acc_lst_name);
-
-
- if (bsc_lst) {
- /* 2. BSC allow */
- if (bsc_nat_lst_check_allow(bsc_lst, imsi) == 0)
- return 1;
-
- /* 3. BSC deny */
- if (lst_check_deny(bsc_lst, imsi, &cm, &lu) == 0) {
- LOGP(DNAT, LOGL_ERROR,
- "Filtering %s by imsi_deny on bsc nr: %d.\n", imsi, bsc->cfg->nr);
- rate_ctr_inc(&bsc_lst->stats->ctr[ACC_LIST_BSC_FILTER]);
- cause->cm_reject_cause = cm;
- cause->lu_reject_cause = lu;
- return -2;
- }
-
- }
-
- /* 4. NAT deny */
- if (nat_lst) {
- if (lst_check_deny(nat_lst, imsi, &cm, &lu) == 0) {
- LOGP(DNAT, LOGL_ERROR,
- "Filtering %s by nat imsi_deny on bsc nr: %d.\n", imsi, bsc->cfg->nr);
- rate_ctr_inc(&nat_lst->stats->ctr[ACC_LIST_NAT_FILTER]);
- cause->cm_reject_cause = cm;
- cause->lu_reject_cause = lu;
- return -3;
- }
- }
-
- return 1;
-}
-
-static int _cr_check_loc_upd(struct bsc_connection *bsc,
- uint8_t *data, unsigned int length,
- char **imsi)
-{
- uint8_t mi_type;
- struct gsm48_loc_upd_req *lu;
- char mi_string[GSM48_MI_SIZE];
-
- if (length < sizeof(*lu)) {
- LOGP(DNAT, LOGL_ERROR,
- "LU does not fit. Length is %d \n", length);
- return -1;
- }
-
- lu = (struct gsm48_loc_upd_req *) data;
- mi_type = lu->mi[0] & GSM_MI_TYPE_MASK;
-
- /*
- * We can only deal with the IMSI. This will fail for a phone that
- * will send the TMSI of a previous network to us.
- */
- if (mi_type != GSM_MI_TYPE_IMSI)
- return 0;
-
- gsm48_mi_to_string(mi_string, sizeof(mi_string), lu->mi, lu->mi_len);
- *imsi = talloc_strdup(bsc, mi_string);
- return 1;
-}
-
-static int _cr_check_cm_serv_req(struct bsc_connection *bsc,
- uint8_t *data, unsigned int length,
- int *con_type, char **imsi)
-{
- static const uint32_t classmark_offset =
- offsetof(struct gsm48_service_request, classmark);
-
- char mi_string[GSM48_MI_SIZE];
- uint8_t mi_type;
- int rc;
- struct gsm48_service_request *req;
-
- /* unfortunately in Phase1 the classmark2 length is variable */
-
- if (length < sizeof(*req)) {
- LOGP(DNAT, LOGL_ERROR,
- "CM Serv Req does not fit. Length is %d\n", length);
- return -1;
- }
-
- req = (struct gsm48_service_request *) data;
- if (req->cm_service_type == 0x8)
- *con_type = NAT_CON_TYPE_SSA;
- rc = gsm48_extract_mi((uint8_t *) &req->classmark,
- length - classmark_offset, mi_string, &mi_type);
- if (rc < 0) {
- LOGP(DNAT, LOGL_ERROR, "Failed to parse the classmark2/mi. error: %d\n", rc);
- return -1;
- }
-
- /* we have to let the TMSI or such pass */
- if (mi_type != GSM_MI_TYPE_IMSI)
- return 0;
-
- *imsi = talloc_strdup(bsc, mi_string);
- return 1;
-}
-
-static int _cr_check_pag_resp(struct bsc_connection *bsc,
- uint8_t *data, unsigned int length, char **imsi)
-{
- struct gsm48_pag_resp *resp;
- char mi_string[GSM48_MI_SIZE];
- uint8_t mi_type;
-
- if (length < sizeof(*resp)) {
- LOGP(DNAT, LOGL_ERROR, "PAG RESP does not fit. Length was %d.\n", length);
- return -1;
- }
-
- resp = (struct gsm48_pag_resp *) data;
- if (gsm48_paging_extract_mi(resp, length, mi_string, &mi_type) < 0) {
- LOGP(DNAT, LOGL_ERROR, "Failed to extract the MI.\n");
- return -1;
- }
-
- /* we need to let it pass for now */
- if (mi_type != GSM_MI_TYPE_IMSI)
- return 0;
-
- *imsi = talloc_strdup(bsc, mi_string);
- return 1;
-}
-
-static int _dt_check_id_resp(struct bsc_connection *bsc,
- uint8_t *data, unsigned int length,
- struct nat_sccp_connection *con,
- struct bsc_nat_reject_cause *cause)
-{
- char mi_string[GSM48_MI_SIZE];
- uint8_t mi_type;
-
- if (length < 2) {
- LOGP(DNAT, LOGL_ERROR, "mi does not fit.\n");
- return -1;
- }
-
- if (data[0] < length - 1) {
- LOGP(DNAT, LOGL_ERROR, "mi length too big.\n");
- return -2;
- }
-
- mi_type = data[1] & GSM_MI_TYPE_MASK;
- gsm48_mi_to_string(mi_string, sizeof(mi_string), &data[1], data[0]);
-
- if (mi_type != GSM_MI_TYPE_IMSI)
- return 0;
-
- con->imsi_checked = 1;
- con->imsi = talloc_strdup(con, mi_string);
- return auth_imsi(bsc, mi_string, cause);
-}
-
-
/* Filter out CR data... */
int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg,
struct bsc_nat_parsed *parsed, int *con_type,
- char **imsi, struct bsc_nat_reject_cause *cause)
+ char **imsi, struct bsc_filter_reject_cause *cause)
{
+ struct bsc_filter_request req;
struct tlv_parsed tp;
struct gsm48_hdr *hdr48;
int hdr48_len;
- int len, ret = 0;
- uint8_t msg_type, proto;
+ int len;
- *con_type = NAT_CON_TYPE_NONE;
+ *con_type = FLT_CON_TYPE_NONE;
cause->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
cause->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
*imsi = NULL;
@@ -374,55 +78,27 @@ int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg,
}
hdr48 = (struct gsm48_hdr *) TLVP_VAL(&tp, GSM0808_IE_LAYER_3_INFORMATION);
-
- proto = hdr48->proto_discr & 0x0f;
- msg_type = hdr48->msg_type & 0xbf;
- if (proto == GSM48_PDISC_MM &&
- msg_type == GSM48_MT_MM_LOC_UPD_REQUEST) {
- *con_type = NAT_CON_TYPE_LU;
- ret = _cr_check_loc_upd(bsc, &hdr48->data[0],
- hdr48_len - sizeof(*hdr48), imsi);
- } else if (proto == GSM48_PDISC_MM &&
- msg_type == GSM48_MT_MM_CM_SERV_REQ) {
- *con_type = NAT_CON_TYPE_CM_SERV_REQ;
- ret = _cr_check_cm_serv_req(bsc, &hdr48->data[0],
- hdr48_len - sizeof(*hdr48),
- con_type, imsi);
- } else if (proto == GSM48_PDISC_RR &&
- msg_type == GSM48_MT_RR_PAG_RESP) {
- *con_type = NAT_CON_TYPE_PAG_RESP;
- ret = _cr_check_pag_resp(bsc, &hdr48->data[0],
- hdr48_len - sizeof(*hdr48), imsi);
- } else {
- /* We only want to filter the above, let other things pass */
- *con_type = NAT_CON_TYPE_OTHER;
- return 0;
- }
-
- /* check if we are done */
- if (ret != 1)
- return ret;
-
- /* the memory allocation failed */
- if (!*imsi)
- return -1;
-
- /* now check the imsi */
- return auth_imsi(bsc, *imsi, cause);
+ req.ctx = bsc;
+ req.black_list = &bsc->nat->imsi_black_list;
+ req.access_lists = &bsc->nat->access_lists;
+ req.local_lst_name = bsc->cfg->acc_lst_name;
+ req.global_lst_name = bsc->nat->acc_lst_name;
+ req.bsc_nr = bsc->cfg->nr;
+ return bsc_msg_filter_initial(hdr48, hdr48_len, &req, con_type, imsi, cause);
}
int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
struct nat_sccp_connection *con, struct bsc_nat_parsed *parsed,
- struct bsc_nat_reject_cause *cause)
+ struct bsc_filter_reject_cause *cause)
{
uint32_t len;
- uint8_t msg_type, proto;
struct gsm48_hdr *hdr48;
+ struct bsc_filter_request req;
cause->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
cause->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
- if (con->imsi_checked)
+ if (con->filter_state.imsi_checked)
return 0;
/* only care about DTAP messages */
@@ -433,11 +109,11 @@ int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
if (!hdr48)
return -1;
- proto = hdr48->proto_discr & 0x0f;
- msg_type = hdr48->msg_type & 0xbf;
- if (proto != GSM48_PDISC_MM || msg_type != GSM48_MT_MM_ID_RESP)
- return 0;
-
- return _dt_check_id_resp(bsc, &hdr48->data[0],
- len - sizeof(*hdr48), con, cause);
+ req.ctx = bsc;
+ req.black_list = &bsc->nat->imsi_black_list;
+ req.access_lists = &bsc->nat->access_lists;
+ req.local_lst_name = bsc->cfg->acc_lst_name;
+ req.global_lst_name = bsc->nat->acc_lst_name;
+ req.bsc_nr = bsc->cfg->nr;
+ return bsc_msg_filter_data(hdr48, len, &req, &con->filter_state, cause);
}
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
index 70ad577..d95227d 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
@@ -23,6 +23,7 @@
#include <openbsc/bsc_nat.h>
#include <openbsc/bsc_nat_sccp.h>
+#include <openbsc/bsc_msg_filter.h>
#include <openbsc/bsc_msc.h>
#include <openbsc/gsm_data.h>
#include <openbsc/debug.h>
@@ -66,18 +67,6 @@ static const struct rate_ctr_group_desc bsc_cfg_ctrg_desc = {
.ctr_desc = bsc_cfg_ctr_description,
};
-static const struct rate_ctr_desc acc_list_ctr_description[] = {
- [ACC_LIST_BSC_FILTER] = { "access-list.bsc-filter", "Rejected by rule for BSC"},
- [ACC_LIST_NAT_FILTER] = { "access-list.nat-filter", "Rejected by rule for NAT"},
-};
-
-static const struct rate_ctr_group_desc bsc_cfg_acc_list_desc = {
- .group_name_prefix = "nat.filter",
- .group_description = "NAT Access-List Statistics",
- .num_ctr = ARRAY_SIZE(acc_list_ctr_description),
- .ctr_desc = acc_list_ctr_description,
-};
-
struct bsc_nat *bsc_nat_alloc(void)
{
struct bsc_nat *nat = talloc_zero(tall_bsc_ctx, struct bsc_nat);
@@ -123,12 +112,12 @@ struct bsc_nat *bsc_nat_alloc(void)
void bsc_nat_free(struct bsc_nat *nat)
{
struct bsc_config *cfg, *tmp;
- struct bsc_nat_acc_lst *lst, *tmp_lst;
+ struct bsc_msg_acc_lst *lst, *tmp_lst;
llist_for_each_entry_safe(cfg, tmp, &nat->bsc_configs, entry)
bsc_config_free(cfg);
llist_for_each_entry_safe(lst, tmp_lst, &nat->access_lists, list)
- bsc_nat_acc_lst_delete(lst);
+ bsc_msg_acc_lst_delete(lst);
bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, NULL);
bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr_post, NULL);
@@ -392,20 +381,6 @@ int bsc_write_msg(struct osmo_wqueue *queue, struct msgb *msg)
return 0;
}
-int bsc_nat_lst_check_allow(struct bsc_nat_acc_lst *lst, const char *mi_string)
-{
- struct bsc_nat_acc_lst_entry *entry;
-
- llist_for_each_entry(entry, &lst->fltr_list, list) {
- if (!entry->imsi_allow)
- continue;
- if (regexec(&entry->imsi_allow_re, mi_string, 0, NULL, 0) == 0)
- return 0;
- }
-
- return 1;
-}
-
struct gsm48_hdr *bsc_unpack_dtap(struct bsc_nat_parsed *parsed,
struct msgb *msg, uint32_t *len)
{
@@ -428,13 +403,13 @@ struct gsm48_hdr *bsc_unpack_dtap(struct bsc_nat_parsed *parsed,
}
static const char *con_types [] = {
- [NAT_CON_TYPE_NONE] = "n/a",
- [NAT_CON_TYPE_LU] = "Location Update",
- [NAT_CON_TYPE_CM_SERV_REQ] = "CM Serv Req",
- [NAT_CON_TYPE_PAG_RESP] = "Paging Response",
- [NAT_CON_TYPE_SSA] = "Supplementar Service Activation",
- [NAT_CON_TYPE_LOCAL_REJECT] = "Local Reject",
- [NAT_CON_TYPE_OTHER] = "Other",
+ [FLT_CON_TYPE_NONE] = "n/a",
+ [FLT_CON_TYPE_LU] = "Location Update",
+ [FLT_CON_TYPE_CM_SERV_REQ] = "CM Serv Req",
+ [FLT_CON_TYPE_PAG_RESP] = "Paging Response",
+ [FLT_CON_TYPE_SSA] = "Supplementar Service Activation",
+ [FLT_CON_TYPE_LOCAL_REJECT] = "Local Reject",
+ [FLT_CON_TYPE_OTHER] = "Other",
};
const char *bsc_con_type_to_string(int type)
@@ -442,86 +417,24 @@ const char *bsc_con_type_to_string(int type)
return con_types[type];
}
-struct bsc_nat_acc_lst *bsc_nat_acc_lst_find(struct bsc_nat *nat, const char *name)
-{
- struct bsc_nat_acc_lst *lst;
-
- if (!name)
- return NULL;
-
- llist_for_each_entry(lst, &nat->access_lists, list)
- if (strcmp(lst->name, name) == 0)
- return lst;
-
- return NULL;
-}
-
-struct bsc_nat_acc_lst *bsc_nat_acc_lst_get(struct bsc_nat *nat, const char *name)
-{
- struct bsc_nat_acc_lst *lst;
-
- lst = bsc_nat_acc_lst_find(nat, name);
- if (lst)
- return lst;
-
- lst = talloc_zero(nat, struct bsc_nat_acc_lst);
- if (!lst) {
- LOGP(DNAT, LOGL_ERROR, "Failed to allocate access list");
- return NULL;
- }
-
- /* TODO: get the index right */
- lst->stats = rate_ctr_group_alloc(lst, &bsc_cfg_acc_list_desc, 0);
- if (!lst->stats) {
- talloc_free(lst);
- return NULL;
- }
-
- INIT_LLIST_HEAD(&lst->fltr_list);
- lst->name = talloc_strdup(lst, name);
- llist_add_tail(&lst->list, &nat->access_lists);
- return lst;
-}
-
-void bsc_nat_acc_lst_delete(struct bsc_nat_acc_lst *lst)
-{
- llist_del(&lst->list);
- rate_ctr_group_free(lst->stats);
- talloc_free(lst);
-}
-
-struct bsc_nat_acc_lst_entry *bsc_nat_acc_lst_entry_create(struct bsc_nat_acc_lst *lst)
-{
- struct bsc_nat_acc_lst_entry *entry;
-
- entry = talloc_zero(lst, struct bsc_nat_acc_lst_entry);
- if (!entry)
- return NULL;
-
- entry->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
- entry->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
- llist_add_tail(&entry->list, &lst->fltr_list);
- return entry;
-}
-
int bsc_nat_msc_is_connected(struct bsc_nat *nat)
{
return nat->msc_con->is_connected;
}
static const int con_to_ctr[] = {
- [NAT_CON_TYPE_NONE] = -1,
- [NAT_CON_TYPE_LU] = BCFG_CTR_CON_TYPE_LU,
- [NAT_CON_TYPE_CM_SERV_REQ] = BCFG_CTR_CON_CMSERV_RQ,
- [NAT_CON_TYPE_PAG_RESP] = BCFG_CTR_CON_PAG_RESP,
- [NAT_CON_TYPE_SSA] = BCFG_CTR_CON_SSA,
- [NAT_CON_TYPE_LOCAL_REJECT] = -1,
- [NAT_CON_TYPE_OTHER] = BCFG_CTR_CON_OTHER,
+ [FLT_CON_TYPE_NONE] = -1,
+ [FLT_CON_TYPE_LU] = BCFG_CTR_CON_TYPE_LU,
+ [FLT_CON_TYPE_CM_SERV_REQ] = BCFG_CTR_CON_CMSERV_RQ,
+ [FLT_CON_TYPE_PAG_RESP] = BCFG_CTR_CON_PAG_RESP,
+ [FLT_CON_TYPE_SSA] = BCFG_CTR_CON_SSA,
+ [FLT_CON_TYPE_LOCAL_REJECT] = -1,
+ [FLT_CON_TYPE_OTHER] = BCFG_CTR_CON_OTHER,
};
int bsc_conn_type_to_ctr(struct nat_sccp_connection *conn)
{
- return con_to_ctr[conn->con_type];
+ return con_to_ctr[conn->filter_state.con_type];
}
int bsc_write_cb(struct osmo_fd *bfd, struct msgb *msg)
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
index 9e66cdc..821e522 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
@@ -22,6 +22,7 @@
#include <openbsc/gsm_data.h>
#include <openbsc/bsc_nat.h>
#include <openbsc/bsc_nat_sccp.h>
+#include <openbsc/bsc_msg_filter.h>
#include <openbsc/bsc_msc.h>
#include <openbsc/gsm_04_08.h>
#include <openbsc/mgcp.h>
@@ -70,22 +71,6 @@ static int config_write_pgroup(struct vty *vty)
return CMD_SUCCESS;
}
-static void write_acc_lst(struct vty *vty, struct bsc_nat_acc_lst *lst)
-{
- struct bsc_nat_acc_lst_entry *entry;
-
- llist_for_each_entry(entry, &lst->fltr_list, list) {
- if (entry->imsi_allow)
- vty_out(vty, " access-list %s imsi-allow %s%s",
- lst->name, entry->imsi_allow, VTY_NEWLINE);
- if (entry->imsi_deny)
- vty_out(vty, " access-list %s imsi-deny %s %d %d%s",
- lst->name, entry->imsi_deny,
- entry->cm_reject_cause, entry->lu_reject_cause,
- VTY_NEWLINE);
- }
-}
-
static void dump_lac(struct vty *vty, struct llist_head *head)
{
struct bsc_lac_entry *lac;
@@ -102,7 +87,7 @@ static void write_pgroup_lst(struct vty *vty, struct bsc_nat_paging_group *pgrou
static int config_write_nat(struct vty *vty)
{
- struct bsc_nat_acc_lst *lst;
+ struct bsc_msg_acc_lst *lst;
struct bsc_nat_paging_group *pgroup;
vty_out(vty, "nat%s", VTY_NEWLINE);
@@ -151,7 +136,7 @@ static int config_write_nat(struct vty *vty)
_nat->num_rewr_trie_name, VTY_NEWLINE);
llist_for_each_entry(lst, &_nat->access_lists, list)
- write_acc_lst(vty, lst);
+ bsc_msg_acc_lst_write(vty, lst);
llist_for_each_entry(pgroup, &_nat->paging_groups, entry)
write_pgroup_lst(vty, pgroup);
if (_nat->mgcp_ipa)
@@ -204,7 +189,7 @@ DEFUN(show_sccp, show_sccp_cmd, "show sccp connections",
con->has_remote_ref,
sccp_src_ref_to_int(&con->remote_ref),
con->msc_endp, con->bsc_endp,
- bsc_con_type_to_string(con->con_type),
+ bsc_con_type_to_string(con->filter_state.con_type),
VTY_NEWLINE);
}
@@ -518,7 +503,7 @@ DEFUN(cfg_nat_imsi_black_list_fn,
int rc;
struct osmo_config_list *rewr = NULL;
rewr = osmo_config_list_parse(_nat, _nat->imsi_black_list_fn);
- rc = bsc_nat_barr_adapt(_nat, &_nat->imsi_black_list, rewr);
+ rc = bsc_filter_barr_adapt(_nat, &_nat->imsi_black_list, rewr);
if (rc != 0) {
vty_out(vty, "%%There was an error parsing the list."
" Please see the error log.%s", VTY_NEWLINE);
@@ -528,7 +513,7 @@ DEFUN(cfg_nat_imsi_black_list_fn,
return CMD_SUCCESS;
}
- bsc_nat_barr_adapt(_nat, &_nat->imsi_black_list, NULL);
+ bsc_filter_barr_adapt(_nat, &_nat->imsi_black_list, NULL);
return CMD_SUCCESS;
}
@@ -539,7 +524,7 @@ DEFUN(cfg_nat_no_imsi_black_list_fn,
{
talloc_free(_nat->imsi_black_list_fn);
_nat->imsi_black_list_fn = NULL;
- bsc_nat_barr_adapt(_nat, &_nat->imsi_black_list, NULL);
+ bsc_filter_barr_adapt(_nat, &_nat->imsi_black_list, NULL);
return CMD_SUCCESS;
}
@@ -867,94 +852,6 @@ DEFUN(cfg_bsc_no_lac, cfg_bsc_no_lac_cmd,
return CMD_SUCCESS;
}
-
-
-DEFUN(cfg_lst_imsi_allow,
- cfg_lst_imsi_allow_cmd,
- "access-list NAME imsi-allow [REGEXP]",
- "Access list commands\n"
- "Name of the access list\n"
- "Add allowed IMSI to the list\n"
- "Regexp for IMSIs\n")
-{
- struct bsc_nat_acc_lst *acc;
- struct bsc_nat_acc_lst_entry *entry;
-
- acc = bsc_nat_acc_lst_get(_nat, argv[0]);
- if (!acc)
- return CMD_WARNING;
-
- entry = bsc_nat_acc_lst_entry_create(acc);
- if (!entry)
- return CMD_WARNING;
-
- if (gsm_parse_reg(acc, &entry->imsi_allow_re, &entry->imsi_allow, argc - 1, &argv[1]) != 0)
- return CMD_WARNING;
- return CMD_SUCCESS;
-}
-
-DEFUN(cfg_lst_imsi_deny,
- cfg_lst_imsi_deny_cmd,
- "access-list NAME imsi-deny [REGEXP] (<0-256>) (<0-256>)",
- "Access list commands\n"
- "Name of the access list\n"
- "Add denied IMSI to the list\n"
- "Regexp for IMSIs\n"
- "CM Service Reject reason\n"
- "LU Reject reason\n")
-{
- struct bsc_nat_acc_lst *acc;
- struct bsc_nat_acc_lst_entry *entry;
-
- acc = bsc_nat_acc_lst_get(_nat, argv[0]);
- if (!acc)
- return CMD_WARNING;
-
- entry = bsc_nat_acc_lst_entry_create(acc);
- if (!entry)
- return CMD_WARNING;
-
- if (gsm_parse_reg(acc, &entry->imsi_deny_re, &entry->imsi_deny, argc - 1, &argv[1]) != 0)
- return CMD_WARNING;
- if (argc >= 3)
- entry->cm_reject_cause = atoi(argv[2]);
- if (argc >= 4)
- entry->lu_reject_cause = atoi(argv[3]);
- return CMD_SUCCESS;
-}
-
-/* naming to follow Zebra... */
-DEFUN(cfg_lst_no,
- cfg_lst_no_cmd,
- "no access-list NAME",
- NO_STR "Remove an access-list by name\n"
- "The access-list to remove\n")
-{
- struct bsc_nat_acc_lst *acc;
- acc = bsc_nat_acc_lst_find(_nat, argv[0]);
- if (!acc)
- return CMD_WARNING;
-
- bsc_nat_acc_lst_delete(acc);
- return CMD_SUCCESS;
-}
-
-DEFUN(show_acc_lst,
- show_acc_lst_cmd,
- "show access-list NAME",
- SHOW_STR "IMSI access list\n" "Name of the access list\n")
-{
- struct bsc_nat_acc_lst *acc;
- acc = bsc_nat_acc_lst_find(_nat, argv[0]);
- if (!acc)
- return CMD_WARNING;
-
- vty_out(vty, "access-list %s%s", acc->name, VTY_NEWLINE);
- vty_out_rate_ctr_group(vty, " ", acc->stats);
-
- return CMD_SUCCESS;
-}
-
DEFUN(show_bar_lst,
show_bar_lst_cmd,
"show imsi-black-list",
@@ -965,8 +862,8 @@ DEFUN(show_bar_lst,
vty_out(vty, "IMSIs barred from the network:%s", VTY_NEWLINE);
for (node = rb_first(&_nat->imsi_black_list); node; node = rb_next(node)) {
- struct bsc_nat_barr_entry *entry;
- entry = rb_entry(node, struct bsc_nat_barr_entry, node);
+ struct bsc_filter_barr_entry *entry;
+ entry = rb_entry(node, struct bsc_filter_barr_entry, node);
vty_out(vty, " IMSI(%s) CM-Reject-Cause(%d) LU-Reject-Cause(%d)%s",
entry->imsi, entry->cm_reject_cause, entry->lu_reject_cause,
@@ -1245,7 +1142,6 @@ int bsc_nat_vty_init(struct bsc_nat *nat)
install_element_ve(&show_msc_cmd);
install_element_ve(&test_regex_cmd);
install_element_ve(&show_bsc_mgcp_cmd);
- install_element_ve(&show_acc_lst_cmd);
install_element_ve(&show_bar_lst_cmd);
install_element_ve(&show_prefix_tree_cmd);
install_element_ve(&show_ussd_connection_cmd);
@@ -1275,10 +1171,7 @@ int bsc_nat_vty_init(struct bsc_nat *nat)
install_element(NAT_NODE, &cfg_nat_ussd_local_cmd);
install_element(NAT_NODE, &cfg_nat_use_ipa_for_mgcp_cmd);
- /* access-list */
- install_element(NAT_NODE, &cfg_lst_imsi_allow_cmd);
- install_element(NAT_NODE, &cfg_lst_imsi_deny_cmd);
- install_element(NAT_NODE, &cfg_lst_no_cmd);
+ bsc_msg_lst_vty_init(nat, &nat->access_lists, NAT_NODE);
/* number rewriting */
install_element(NAT_NODE, &cfg_nat_number_rewrite_cmd);
diff --git a/openbsc/src/osmo-bsc_nat/bsc_ussd.c b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
index 67844b8..1082414 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_ussd.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
@@ -22,6 +22,7 @@
#include <openbsc/bsc_nat.h>
#include <openbsc/bsc_nat_sccp.h>
+#include <openbsc/bsc_msg_filter.h>
#include <openbsc/ipaccess.h>
#include <openbsc/socket.h>
@@ -350,7 +351,7 @@ static int forward_ussd(struct nat_sccp_connection *con, const struct ussd_reque
state->invoke_id = req->invoke_id;
memcpy(&state->src_ref, &con->remote_ref, sizeof(con->remote_ref));
memcpy(&state->dst_ref, &con->real_ref, sizeof(con->real_ref));
- memcpy(state->imsi, con->imsi, strlen(con->imsi));
+ memcpy(state->imsi, con->filter_state.imsi, strlen(con->filter_state.imsi));
/* add additional tag/values */
lac = htons(con->lac);
@@ -373,7 +374,7 @@ int bsc_ussd_check(struct nat_sccp_connection *con, struct bsc_nat_parsed *parse
uint8_t proto;
uint8_t ti;
struct gsm48_hdr *hdr48;
- struct bsc_nat_acc_lst *lst;
+ struct bsc_msg_acc_lst *lst;
struct ussd_request req;
/*
@@ -381,10 +382,10 @@ int bsc_ussd_check(struct nat_sccp_connection *con, struct bsc_nat_parsed *parse
* decode if the connection was created for USSD, we do have a USSD access
* list, a query, a IMSI and such...
*/
- if (con->con_type != NAT_CON_TYPE_SSA)
+ if (con->filter_state.con_type != FLT_CON_TYPE_SSA)
return 0;
- if (!con->imsi)
+ if (!con->filter_state.imsi)
return 0;
/* We have not verified the IMSI yet */
@@ -399,7 +400,7 @@ int bsc_ussd_check(struct nat_sccp_connection *con, struct bsc_nat_parsed *parse
if (parsed->bssap != BSSAP_MSG_DTAP)
return 0;
- if (strlen(con->imsi) >= GSM_IMSI_LENGTH)
+ if (strlen(con->filter_state.imsi) >= GSM_IMSI_LENGTH)
return 0;
hdr48 = bsc_unpack_dtap(parsed, msg, &len);
@@ -415,12 +416,12 @@ int bsc_ussd_check(struct nat_sccp_connection *con, struct bsc_nat_parsed *parse
if (msg_type == GSM0480_MTYPE_REGISTER) {
/* now check if it is a IMSI we care about */
- lst = bsc_nat_acc_lst_find(con->bsc->nat,
+ lst = bsc_msg_acc_lst_find(&con->bsc->nat->access_lists,
con->bsc->nat->ussd_lst_name);
if (!lst)
return 0;
- if (bsc_nat_lst_check_allow(lst, con->imsi) != 0)
+ if (bsc_msg_acc_lst_check_allow(lst, con->filter_state.imsi) != 0)
return 0;
/* now decode the message and see if we really want to handle it */
@@ -435,14 +436,15 @@ int bsc_ussd_check(struct nat_sccp_connection *con, struct bsc_nat_parsed *parse
return 0;
/* found a USSD query for our subscriber */
- LOGP(DNAT, LOGL_NOTICE, "Found USSD query for %s\n", con->imsi);
+ LOGP(DNAT, LOGL_NOTICE, "Found USSD query for %s\n",
+ con->filter_state.imsi);
con->ussd_ti[ti] = 1;
if (forward_ussd(con, &req, msg) != 0)
return 0;
return 1;
} else if (msg_type == GSM0480_MTYPE_FACILITY && con->ussd_ti[ti]) {
LOGP(DNAT, LOGL_NOTICE, "Forwarding message part of TI: %d %s\n",
- ti, con->imsi);
+ ti, con->filter_state.imsi);
if (forward_ussd_simple(con, msg) != 0)
return 0;
return 1;
diff --git a/openbsc/tests/bsc-nat/Makefile.am b/openbsc/tests/bsc-nat/Makefile.am
index b620d96..26e5500 100644
--- a/openbsc/tests/bsc-nat/Makefile.am
+++ b/openbsc/tests/bsc-nat/Makefile.am
@@ -10,11 +10,13 @@ bsc_nat_test_SOURCES = bsc_nat_test.c \
$(top_srcdir)/src/osmo-bsc_nat/bsc_filter.c \
$(top_srcdir)/src/osmo-bsc_nat/bsc_sccp.c \
$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_utils.c \
- $(top_srcdir)/src/osmo-bsc_nat/bsc_nat_filter.c \
$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_rewrite.c \
$(top_srcdir)/src/osmo-bsc_nat/bsc_nat_rewrite_trie.c \
- $(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c
-bsc_nat_test_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+ $(top_srcdir)/src/osmo-bsc_nat/bsc_mgcp_utils.c \
+ $(top_srcdir)/src/osmo-bsc_nat/bsc_nat_filter.c
+bsc_nat_test_LDADD = \
+ $(top_builddir)/src/libfilter/libfilter.a \
+ $(top_builddir)/src/libbsc/libbsc.a \
$(top_builddir)/src/libmgcp/libmgcp.a \
$(top_builddir)/src/libtrau/libtrau.a \
$(top_builddir)/src/libcommon/libcommon.a \
diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index 5b01cc3..b830eb0 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -26,6 +26,7 @@
#include <openbsc/gsm_data.h>
#include <openbsc/bsc_nat.h>
#include <openbsc/bsc_nat_sccp.h>
+#include <openbsc/bsc_msg_filter.h>
#include <openbsc/nat_rewrite_trie.h>
#include <osmocom/core/application.h>
@@ -710,7 +711,7 @@ static struct cr_filter cr_filter[] = {
.data = bssmap_cr,
.length = sizeof(bssmap_cr),
.result = 1,
- .contype = NAT_CON_TYPE_CM_SERV_REQ,
+ .contype = FLT_CON_TYPE_CM_SERV_REQ,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -722,7 +723,7 @@ static struct cr_filter cr_filter[] = {
.data = bss_lu,
.length = sizeof(bss_lu),
.result = 1,
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -734,7 +735,7 @@ static struct cr_filter cr_filter[] = {
.data = pag_resp,
.length = sizeof(pag_resp),
.result = 1,
- .contype = NAT_CON_TYPE_PAG_RESP,
+ .contype = FLT_CON_TYPE_PAG_RESP,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -748,7 +749,7 @@ static struct cr_filter cr_filter[] = {
.length = sizeof(bss_lu),
.result = -3,
.nat_imsi_deny = "[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -763,7 +764,7 @@ static struct cr_filter cr_filter[] = {
.result = 1,
.nat_imsi_deny = "[0-9]*",
.bsc_imsi_allow = "2440[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -778,7 +779,7 @@ static struct cr_filter cr_filter[] = {
.result = 1,
.bsc_imsi_allow = "[0-9]*",
.nat_imsi_deny = "[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -794,7 +795,7 @@ static struct cr_filter cr_filter[] = {
.bsc_imsi_deny = "[0-9]*",
.bsc_imsi_allow = "[0-9]*",
.nat_imsi_deny = "[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -809,7 +810,7 @@ static struct cr_filter cr_filter[] = {
.result = -3,
.bsc_imsi_deny = "000[0-9]*",
.nat_imsi_deny = "[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -824,7 +825,7 @@ static struct cr_filter cr_filter[] = {
.result = -3,
.bsc_imsi_deny = "000[0-9]*",
.nat_imsi_deny = "[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = 0x23,
.nat_lu_reject_cause = 0x42,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -838,7 +839,7 @@ static struct cr_filter cr_filter[] = {
.length = sizeof(bss_lu),
.result = -2,
.bsc_imsi_deny = "[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
@@ -852,7 +853,7 @@ static struct cr_filter cr_filter[] = {
.length = sizeof(bss_lu),
.result = -2,
.bsc_imsi_deny = "[0-9]*",
- .contype = NAT_CON_TYPE_LU,
+ .contype = FLT_CON_TYPE_LU,
.nat_cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.nat_lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED,
.bsc_cm_reject_cause = 0x42,
@@ -867,9 +868,9 @@ static void test_cr_filter()
int i, res, contype;
struct msgb *msg = msgb_alloc(4096, "test_cr_filter");
struct bsc_nat_parsed *parsed;
- struct bsc_nat_acc_lst *nat_lst, *bsc_lst;
- struct bsc_nat_acc_lst_entry *nat_entry, *bsc_entry;
- struct bsc_nat_reject_cause cause;
+ struct bsc_msg_acc_lst *nat_lst, *bsc_lst;
+ struct bsc_msg_acc_lst_entry *nat_entry, *bsc_entry;
+ struct bsc_filter_reject_cause cause;
struct bsc_nat *nat = bsc_nat_alloc();
struct bsc_connection *bsc = bsc_connection_alloc(nat);
@@ -878,11 +879,11 @@ static void test_cr_filter()
bsc->cfg->acc_lst_name = "bsc";
nat->acc_lst_name = "nat";
- nat_lst = bsc_nat_acc_lst_get(nat, "nat");
- bsc_lst = bsc_nat_acc_lst_get(nat, "bsc");
+ nat_lst = bsc_msg_acc_lst_get(nat, &nat->access_lists, "nat");
+ bsc_lst = bsc_msg_acc_lst_get(nat, &nat->access_lists, "bsc");
- bsc_entry = bsc_nat_acc_lst_entry_create(bsc_lst);
- nat_entry = bsc_nat_acc_lst_entry_create(nat_lst);
+ bsc_entry = bsc_msg_acc_lst_entry_create(bsc_lst);
+ nat_entry = bsc_msg_acc_lst_entry_create(nat_lst);
/* test the default value as we are going to overwrite it */
OSMO_ASSERT(bsc_entry->cm_reject_cause == GSM48_REJECT_PLMN_NOT_ALLOWED);
@@ -946,7 +947,7 @@ static void test_dt_filter()
int i;
struct msgb *msg = msgb_alloc(4096, "test_dt_filter");
struct bsc_nat_parsed *parsed;
- struct bsc_nat_reject_cause cause;
+ struct bsc_filter_reject_cause cause;
struct bsc_nat *nat = bsc_nat_alloc();
struct bsc_connection *bsc = bsc_connection_alloc(nat);
@@ -991,7 +992,7 @@ static void test_dt_filter()
if (!parsed)
continue;
- con->imsi_checked = 0;
+ con->filter_state.imsi_checked = 0;
memset(&cause, 0, sizeof(cause));
bsc_nat_filter_dt(bsc, msg, con, parsed, &cause);
}
@@ -1453,21 +1454,21 @@ static void test_barr_list_parsing(void)
if (lst == NULL)
abort();
- rc = bsc_nat_barr_adapt(NULL, &root, lst);
+ rc = bsc_filter_barr_adapt(NULL, &root, lst);
if (rc != 0)
abort();
talloc_free(lst);
for (node = rb_first(&root); node; node = rb_next(node)) {
- struct bsc_nat_barr_entry *entry;
- entry = rb_entry(node, struct bsc_nat_barr_entry, node);
+ struct bsc_filter_barr_entry *entry;
+ entry = rb_entry(node, struct bsc_filter_barr_entry, node);
printf("IMSI: %s CM: %d LU: %d\n", entry->imsi,
entry->cm_reject_cause, entry->lu_reject_cause);
}
/* do the look up now.. */
- rc = bsc_nat_barr_find(&root, "12123119", &cm, &lu);
+ rc = bsc_filter_barr_find(&root, "12123119", &cm, &lu);
if (!rc) {
printf("Failed to find the IMSI.\n");
abort();
@@ -1479,7 +1480,7 @@ static void test_barr_list_parsing(void)
}
/* empty and check that it is empty */
- bsc_nat_barr_adapt(NULL, &root, NULL);
+ bsc_filter_barr_adapt(NULL, &root, NULL);
if (!RB_EMPTY_ROOT(&root)) {
printf("Failed to empty the list.\n");
abort();
@@ -1492,7 +1493,7 @@ static void test_barr_list_parsing(void)
abort();
}
- rc = bsc_nat_barr_adapt(NULL, &root, lst);
+ rc = bsc_filter_barr_adapt(NULL, &root, lst);
if (rc != -1) {
printf("It should have failed due dup\n");
abort();
@@ -1501,13 +1502,13 @@ static void test_barr_list_parsing(void)
/* dump for reference */
for (node = rb_first(&root); node; node = rb_next(node)) {
- struct bsc_nat_barr_entry *entry;
- entry = rb_entry(node, struct bsc_nat_barr_entry, node);
+ struct bsc_filter_barr_entry *entry;
+ entry = rb_entry(node, struct bsc_filter_barr_entry, node);
printf("IMSI: %s CM: %d LU: %d\n", entry->imsi,
entry->cm_reject_cause, entry->lu_reject_cause);
}
- rc = bsc_nat_barr_adapt(NULL, &root, NULL);
+ rc = bsc_filter_barr_adapt(NULL, &root, NULL);
}
static void test_nat_extract_lac()