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authorNeels Hofmeyr <nhofmeyr@sysmocom.de>2017-02-18 22:20:46 +0100
committerNeels Hofmeyr <nhofmeyr@sysmocom.de>2017-03-08 01:01:43 +0100
commit6d804b1a7e375213cb4b3e437c2b9b8c68872164 (patch)
tree226c66c67e1d2181e545cb21f83234b90b051a99 /openbsc/src/libbsc
parentabf53d87b6648f2d42562c5699e9035afd92e608 (diff)
add struct bsc_subscr, separating libbsc from gsm_subscriber
In a future commit, gsm_subscriber will be replaced by vlr_subscr, and it will not make sense to use vlr_subscr in libbsc. Thus we need a dedicated BSC subscriber: struct bsc_subscr. Add rf_policy arg to bsc_grace_paging_request() because the bsc_subscr will no longer have a backpointer to gsm_network (used to be via subscr->group). Create a separate logging filter for the new BSC subscriber. The implementation of adjusting the filter context is added in libbsc to not introduce bsc_subscr_get/_put() dependencies to libcommon. During Paging Response, fetch a bsc_subscr from the mobile identity, like we do for the gsm_subscriber. It looks like a duplication now, but will make sense for the VLR as well as for future MSC split patches. Naming: it was requested to not name the new struct bsc_sub, because 'sub' is too ambiguous. At the same time it would be fine to have 'bsc_sub_' as function prefix. Instead of struct bsc_subscriber and bsc_sub_ prefix, I decided to match both up as struct bsc_subscr and bsc_subscr_ function prefix. It's fast to type, relatively short, unambiguous, and the naming is consistent. Add bsc_subscr unit test. Related: OS#1592, OS#1594 Change-Id: Ia61cc00e8bb186b976939a4fc8f7cf9ce6aa3d8e
Diffstat (limited to 'openbsc/src/libbsc')
-rw-r--r--openbsc/src/libbsc/Makefile.am1
-rw-r--r--openbsc/src/libbsc/abis_rsl.c4
-rw-r--r--openbsc/src/libbsc/bsc_subscriber.c168
-rw-r--r--openbsc/src/libbsc/bsc_vty.c12
-rw-r--r--openbsc/src/libbsc/gsm_04_08_utils.c20
-rw-r--r--openbsc/src/libbsc/paging.c88
6 files changed, 239 insertions, 54 deletions
diff --git a/openbsc/src/libbsc/Makefile.am b/openbsc/src/libbsc/Makefile.am
index b8e77e6..fd8f37a 100644
--- a/openbsc/src/libbsc/Makefile.am
+++ b/openbsc/src/libbsc/Makefile.am
@@ -24,6 +24,7 @@ libbsc_a_SOURCES = \
abis_om2000_vty.c \
abis_rsl.c \
bsc_rll.c \
+ bsc_subscriber.c \
paging.c \
bts_ericsson_rbs2000.c \
bts_ipaccess_nanobts.c \
diff --git a/openbsc/src/libbsc/abis_rsl.c b/openbsc/src/libbsc/abis_rsl.c
index 1cae832..5939e75 100644
--- a/openbsc/src/libbsc/abis_rsl.c
+++ b/openbsc/src/libbsc/abis_rsl.c
@@ -1332,10 +1332,10 @@ static void print_meas_rep_uni(struct gsm_meas_rep_unidir *mru,
static void print_meas_rep(struct gsm_lchan *lchan, struct gsm_meas_rep *mr)
{
int i;
- char *name = "";
+ const char *name = "";
if (lchan && lchan->conn)
- name = subscr_name(lchan->conn->subscr);
+ name = bsc_subscr_name(lchan->conn->bsub);
DEBUGP(DMEAS, "[%s] MEASUREMENT RESULT NR=%d ", name, mr->nr);
diff --git a/openbsc/src/libbsc/bsc_subscriber.c b/openbsc/src/libbsc/bsc_subscriber.c
new file mode 100644
index 0000000..a5e40cd
--- /dev/null
+++ b/openbsc/src/libbsc/bsc_subscriber.c
@@ -0,0 +1,168 @@
+/* GSM subscriber details for use in BSC land */
+
+/*
+ * (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ *
+ * Author: Neels Hofmeyr <nhofmeyr@sysmocom.de>
+ *
+ * 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 <talloc.h>
+#include <string.h>
+#include <limits.h>
+
+#include <osmocom/gsm/gsm48.h>
+#include <osmocom/core/logging.h>
+
+#include <openbsc/bsc_subscriber.h>
+#include <openbsc/debug.h>
+
+static struct bsc_subscr *bsc_subscr_alloc(struct llist_head *list)
+{
+ struct bsc_subscr *bsub;
+
+ bsub = talloc_zero(list, struct bsc_subscr);
+ if (!bsub)
+ return NULL;
+
+ llist_add_tail(&bsub->entry, list);
+ bsub->use_count = 1;
+
+ return bsub;
+}
+
+struct bsc_subscr *bsc_subscr_find_by_imsi(struct llist_head *list,
+ const char *imsi)
+{
+ struct bsc_subscr *bsub;
+
+ if (!imsi || !*imsi)
+ return NULL;
+
+ llist_for_each_entry(bsub, list, entry) {
+ if (!strcmp(bsub->imsi, imsi))
+ return bsc_subscr_get(bsub);
+ }
+ return NULL;
+}
+
+struct bsc_subscr *bsc_subscr_find_by_tmsi(struct llist_head *list,
+ uint32_t tmsi)
+{
+ struct bsc_subscr *bsub;
+
+ if (tmsi == GSM_RESERVED_TMSI)
+ return NULL;
+
+ llist_for_each_entry(bsub, list, entry) {
+ if (bsub->tmsi == tmsi)
+ return bsc_subscr_get(bsub);
+ }
+ return NULL;
+}
+
+void bsc_subscr_set_imsi(struct bsc_subscr *bsub, const char *imsi)
+{
+ if (!bsub)
+ return;
+ strncpy(bsub->imsi, imsi, sizeof(bsub->imsi));
+}
+
+struct bsc_subscr *bsc_subscr_find_or_create_by_imsi(struct llist_head *list,
+ const char *imsi)
+{
+ struct bsc_subscr *bsub;
+ bsub = bsc_subscr_find_by_imsi(list, imsi);
+ if (bsub)
+ return bsub;
+ bsub = bsc_subscr_alloc(list);
+ bsc_subscr_set_imsi(bsub, imsi);
+ return bsub;
+}
+
+struct bsc_subscr *bsc_subscr_find_or_create_by_tmsi(struct llist_head *list,
+ uint32_t tmsi)
+{
+ struct bsc_subscr *bsub;
+ bsub = bsc_subscr_find_by_tmsi(list, tmsi);
+ if (bsub)
+ return bsub;
+ bsub = bsc_subscr_alloc(list);
+ bsub->tmsi = tmsi;
+ return bsub;
+}
+
+const char *bsc_subscr_name(struct bsc_subscr *bsub)
+{
+ static char buf[32];
+ if (!bsub)
+ return "unknown";
+ if (bsub->imsi[0])
+ snprintf(buf, sizeof(buf), "IMSI:%s", bsub->imsi);
+ else
+ snprintf(buf, sizeof(buf), "TMSI:0x%08x", bsub->tmsi);
+ return buf;
+}
+
+static void bsc_subscr_free(struct bsc_subscr *bsub)
+{
+ llist_del(&bsub->entry);
+ talloc_free(bsub);
+}
+
+struct bsc_subscr *_bsc_subscr_get(struct bsc_subscr *bsub,
+ const char *file, int line)
+{
+ OSMO_ASSERT(bsub->use_count < INT_MAX);
+ bsub->use_count++;
+ LOGPSRC(DREF, LOGL_DEBUG, file, line,
+ "BSC subscr %s usage increases to: %d\n",
+ bsc_subscr_name(bsub), bsub->use_count);
+ return bsub;
+}
+
+struct bsc_subscr *_bsc_subscr_put(struct bsc_subscr *bsub,
+ const char *file, int line)
+{
+ bsub->use_count--;
+ LOGPSRC(DREF, bsub->use_count >= 0? LOGL_DEBUG : LOGL_ERROR,
+ file, line,
+ "BSC subscr %s usage decreases to: %d\n",
+ bsc_subscr_name(bsub), bsub->use_count);
+ if (bsub->use_count <= 0)
+ bsc_subscr_free(bsub);
+ return NULL;
+}
+
+void log_set_filter_bsc_subscr(struct log_target *target,
+ struct bsc_subscr *bsc_subscr)
+{
+ struct bsc_subscr **fsub = (void*)&target->filter_data[LOG_FLT_BSC_SUBSCR];
+
+ /* free the old data */
+ if (*fsub) {
+ bsc_subscr_put(*fsub);
+ *fsub = NULL;
+ }
+
+ if (bsc_subscr) {
+ target->filter_map |= (1 << LOG_FLT_BSC_SUBSCR);
+ *fsub = bsc_subscr_get(bsc_subscr);
+ } else
+ target->filter_map &= ~(1 << LOG_FLT_BSC_SUBSCR);
+}
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index 0a55cf4..b1747aa 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -1023,6 +1023,16 @@ static void subscr_dump_vty(struct vty *vty, struct gsm_subscriber *subscr)
vty_out(vty, " Use count: %u%s", subscr->use_count, VTY_NEWLINE);
}
+static void bsc_subscr_dump_vty(struct vty *vty, struct bsc_subscr *bsub)
+{
+ if (strlen(bsub->imsi))
+ vty_out(vty, " IMSI: %s%s", bsub->imsi, VTY_NEWLINE);
+ if (bsub->tmsi != GSM_RESERVED_TMSI)
+ vty_out(vty, " TMSI: 0x%08x%s", bsub->tmsi,
+ VTY_NEWLINE);
+ vty_out(vty, " Use count: %d%s", bsub->use_count, VTY_NEWLINE);
+}
+
static void meas_rep_dump_uni_vty(struct vty *vty,
struct gsm_meas_rep_unidir *mru,
const char *prefix,
@@ -1318,7 +1328,7 @@ DEFUN(show_lchan_summary,
static void paging_dump_vty(struct vty *vty, struct gsm_paging_request *pag)
{
vty_out(vty, "Paging on BTS %u%s", pag->bts->nr, VTY_NEWLINE);
- subscr_dump_vty(vty, pag->subscr);
+ bsc_subscr_dump_vty(vty, pag->bsub);
}
static void bts_paging_dump_vty(struct vty *vty, struct gsm_bts *bts)
diff --git a/openbsc/src/libbsc/gsm_04_08_utils.c b/openbsc/src/libbsc/gsm_04_08_utils.c
index 98f0790..4a53b31 100644
--- a/openbsc/src/libbsc/gsm_04_08_utils.c
+++ b/openbsc/src/libbsc/gsm_04_08_utils.c
@@ -283,7 +283,7 @@ int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length,
}
int gsm48_handle_paging_resp(struct gsm_subscriber_connection *conn,
- struct msgb *msg, struct gsm_subscriber *subscr)
+ struct msgb *msg, struct bsc_subscr *bsub)
{
struct gsm_bts *bts = msg->lchan->ts->trx->bts;
struct gsm48_hdr *gh = msgb_l3(msg);
@@ -292,22 +292,24 @@ int gsm48_handle_paging_resp(struct gsm_subscriber_connection *conn,
if (is_siemens_bts(bts))
send_siemens_mrpci(msg->lchan, classmark2_lv);
- if (!conn->subscr) {
- conn->subscr = subscr;
- } else if (conn->subscr != subscr) {
- LOGP(DRR, LOGL_ERROR, "<- Channel already owned by someone else?\n");
- subscr_put(subscr);
+ if (!conn->bsub) {
+ conn->bsub = bsub;
+ } else if (conn->bsub != bsub) {
+ LOGP(DRR, LOGL_ERROR,
+ "<- Channel already owned by someone else?\n");
+ bsc_subscr_put(bsub);
return -EINVAL;
} else {
DEBUGP(DRR, "<- Channel already owned by us\n");
- subscr_put(subscr);
- subscr = conn->subscr;
+ bsc_subscr_put(bsub);
+ bsub = conn->bsub;
}
rate_ctr_inc(&bts->network->bsc_ctrs->ctr[BSC_CTR_PAGING_COMPLETED]);
/* Stop paging on the bts we received the paging response */
- paging_request_stop(conn->bts, subscr, conn, msg);
+ paging_request_stop(&bts->network->bts_list, conn->bts, bsub, conn,
+ msg);
return 0;
}
diff --git a/openbsc/src/libbsc/paging.c b/openbsc/src/libbsc/paging.c
index eb37a33..bd23d89 100644
--- a/openbsc/src/libbsc/paging.c
+++ b/openbsc/src/libbsc/paging.c
@@ -42,6 +42,7 @@
#include <osmocom/gsm/gsm48.h>
#include <osmocom/gsm/gsm0502.h>
+#include <openbsc/bsc_subscriber.h>
#include <openbsc/paging.h>
#include <openbsc/debug.h>
#include <openbsc/signal.h>
@@ -58,11 +59,11 @@ void *tall_paging_ctx;
* Kill one paging request update the internal list...
*/
static void paging_remove_request(struct gsm_bts_paging_state *paging_bts,
- struct gsm_paging_request *to_be_deleted)
+ struct gsm_paging_request *to_be_deleted)
{
osmo_timer_del(&to_be_deleted->T3113);
llist_del(&to_be_deleted->entry);
- subscr_put(to_be_deleted->subscr);
+ bsc_subscr_put(to_be_deleted->bsub);
talloc_free(to_be_deleted);
}
@@ -77,21 +78,21 @@ static void page_ms(struct gsm_paging_request *request)
if (!bts->oml_link)
return;
- log_set_context(LOG_CTX_VLR_SUBSCR, request->subscr);
+ log_set_context(LOG_CTX_BSC_SUBSCR, request->bsub);
LOGP(DPAG, LOGL_INFO, "Going to send paging commands: imsi: %s tmsi: "
- "0x%x for ch. type %d (attempt %d)\n", request->subscr->imsi,
- request->subscr->tmsi, request->chan_type, request->attempts);
+ "0x%08x for ch. type %d (attempt %d)\n", request->bsub->imsi,
+ request->bsub->tmsi, request->chan_type, request->attempts);
- if (request->subscr->tmsi == GSM_RESERVED_TMSI)
- mi_len = gsm48_generate_mid_from_imsi(mi, request->subscr->imsi);
+ if (request->bsub->tmsi == GSM_RESERVED_TMSI)
+ mi_len = gsm48_generate_mid_from_imsi(mi, request->bsub->imsi);
else
- mi_len = gsm48_generate_mid_from_tmsi(mi, request->subscr->tmsi);
+ mi_len = gsm48_generate_mid_from_tmsi(mi, request->bsub->tmsi);
page_group = gsm0502_calc_paging_group(&bts->si_common.chan_desc,
- str_to_imsi(request->subscr->imsi));
+ str_to_imsi(request->bsub->imsi));
gsm0808_page(bts, page_group, mi_len, mi, request->chan_type);
- log_set_context(LOG_CTX_VLR_SUBSCR, NULL);
+ log_set_context(LOG_CTX_BSC_SUBSCR, NULL);
}
static void paging_schedule_if_needed(struct gsm_bts_paging_state *paging_bts)
@@ -237,11 +238,12 @@ static void paging_init_if_needed(struct gsm_bts *bts)
}
static int paging_pending_request(struct gsm_bts_paging_state *bts,
- struct gsm_subscriber *subscr) {
+ struct bsc_subscr *bsub)
+{
struct gsm_paging_request *req;
llist_for_each_entry(req, &bts->pending_requests, entry) {
- if (subscr == req->subscr)
+ if (bsub == req->bsub)
return 1;
}
@@ -255,10 +257,10 @@ static void paging_T3113_expired(void *data)
gsm_cbfn *cbfn;
int msg;
- log_set_context(LOG_CTX_VLR_SUBSCR, req->subscr);
+ log_set_context(LOG_CTX_BSC_SUBSCR, req->bsub);
LOGP(DPAG, LOGL_INFO, "T3113 expired for request %p (%s)\n",
- req, req->subscr->imsi);
+ req, bsc_subscr_name(req->bsub));
/* must be destroyed before calling cbfn, to prevent double free */
rate_ctr_inc(&req->bts->network->bsc_ctrs->ctr[BSC_CTR_PAGING_EXPIRED]);
@@ -277,21 +279,22 @@ static void paging_T3113_expired(void *data)
}
-static int _paging_request(struct gsm_bts *bts, struct gsm_subscriber *subscr,
- int type, gsm_cbfn *cbfn, void *data)
+static int _paging_request(struct gsm_bts *bts, struct bsc_subscr *bsub,
+ int type, gsm_cbfn *cbfn, void *data)
{
struct gsm_bts_paging_state *bts_entry = &bts->paging;
struct gsm_paging_request *req;
- if (paging_pending_request(bts_entry, subscr)) {
- LOGP(DPAG, LOGL_INFO, "Paging request already pending for %s\n", subscr->imsi);
+ if (paging_pending_request(bts_entry, bsub)) {
+ LOGP(DPAG, LOGL_INFO, "Paging request already pending for %s\n",
+ bsc_subscr_name(bsub));
return -EEXIST;
}
- LOGP(DPAG, LOGL_DEBUG, "Start paging of subscriber %llu on bts %d.\n",
- subscr->id, bts->nr);
+ LOGP(DPAG, LOGL_DEBUG, "Start paging of subscriber %s on bts %d.\n",
+ bsc_subscr_name(bsub), bts->nr);
req = talloc_zero(tall_paging_ctx, struct gsm_paging_request);
- req->subscr = subscr_get(subscr);
+ req->bsub = bsc_subscr_get(bsub);
req->bts = bts;
req->chan_type = type;
req->cbfn = cbfn;
@@ -305,8 +308,8 @@ static int _paging_request(struct gsm_bts *bts, struct gsm_subscriber *subscr,
return 0;
}
-int paging_request_bts(struct gsm_bts *bts, struct gsm_subscriber *subscr,
- int type, gsm_cbfn *cbfn, void *data)
+int paging_request_bts(struct gsm_bts *bts, struct bsc_subscr *bsub,
+ int type, gsm_cbfn *cbfn, void *data)
{
int rc;
@@ -317,15 +320,14 @@ int paging_request_bts(struct gsm_bts *bts, struct gsm_subscriber *subscr,
/* maybe it is the first time we use it */
paging_init_if_needed(bts);
-
/* Trigger paging, pass any error to the caller */
- rc = _paging_request(bts, subscr, type, cbfn, data);
+ rc = _paging_request(bts, bsub, type, cbfn, data);
if (rc < 0)
return rc;
return 1;
}
-int paging_request(struct gsm_network *network, struct gsm_subscriber *subscr,
+int paging_request(struct gsm_network *network, struct bsc_subscr *bsub,
int type, gsm_cbfn *cbfn, void *data)
{
struct gsm_bts *bts = NULL;
@@ -337,13 +339,14 @@ int paging_request(struct gsm_network *network, struct gsm_subscriber *subscr,
do {
int rc;
- bts = gsm_bts_by_lac(network, subscr->lac, bts);
+ bts = gsm_bts_by_lac(network, bsub->lac, bts);
if (!bts)
break;
- rc = paging_request_bts(bts, subscr, type, cbfn, data);
+ rc = paging_request_bts(bts, bsub, type, cbfn, data);
if (rc < 0) {
- paging_request_stop(NULL, subscr, NULL, NULL);
+ paging_request_stop(&network->bts_list, NULL, bsub,
+ NULL, NULL);
return rc;
}
num_pages += rc;
@@ -357,7 +360,7 @@ int paging_request(struct gsm_network *network, struct gsm_subscriber *subscr,
/* we consciously ignore the type of the request here */
-static void _paging_request_stop(struct gsm_bts *bts, struct gsm_subscriber *subscr,
+static void _paging_request_stop(struct gsm_bts *bts, struct bsc_subscr *bsub,
struct gsm_subscriber_connection *conn,
struct msgb *msg)
{
@@ -367,8 +370,8 @@ static void _paging_request_stop(struct gsm_bts *bts, struct gsm_subscriber *sub
paging_init_if_needed(bts);
llist_for_each_entry_safe(req, req2, &bts_entry->pending_requests,
- entry) {
- if (req->subscr == subscr) {
+ entry) {
+ if (req->bsub == bsub) {
gsm_cbfn *cbfn = req->cbfn;
void *param = req->cbfn_param;
@@ -377,35 +380,36 @@ static void _paging_request_stop(struct gsm_bts *bts, struct gsm_subscriber *sub
req = NULL;
if (conn && cbfn) {
- LOGP(DPAG, LOGL_DEBUG, "Stop paging %s on bts %d, calling cbfn.\n", subscr->imsi, bts->nr);
+ LOGP(DPAG, LOGL_DEBUG, "Stop paging %s on bts %d, calling cbfn.\n", bsub->imsi, bts->nr);
cbfn(GSM_HOOK_RR_PAGING, GSM_PAGING_SUCCEEDED,
- msg, conn, param);
+ msg, conn, param);
} else
- LOGP(DPAG, LOGL_DEBUG, "Stop paging %s on bts %d silently.\n", subscr->imsi, bts->nr);
+ LOGP(DPAG, LOGL_DEBUG, "Stop paging %s on bts %d silently.\n", bsub->imsi, bts->nr);
break;
}
}
}
/* Stop paging on all other bts' */
-void paging_request_stop(struct gsm_bts *_bts, struct gsm_subscriber *subscr,
+void paging_request_stop(struct llist_head *bts_list,
+ struct gsm_bts *_bts, struct bsc_subscr *bsub,
struct gsm_subscriber_connection *conn,
struct msgb *msg)
{
struct gsm_bts *bts;
- log_set_context(LOG_CTX_VLR_SUBSCR, subscr);
+ log_set_context(LOG_CTX_BSC_SUBSCR, bsub);
/* Stop this first and dispatch the request */
if (_bts)
- _paging_request_stop(_bts, subscr, conn, msg);
+ _paging_request_stop(_bts, bsub, conn, msg);
/* Make sure to cancel this everywhere else */
- llist_for_each_entry(bts, &subscr->group->net->bts_list, list) {
+ llist_for_each_entry(bts, bts_list, list) {
/* Sort of an optimization. */
if (bts == _bts)
continue;
- _paging_request_stop(bts, subscr, NULL, NULL);
+ _paging_request_stop(bts, bsub, NULL, NULL);
}
}
@@ -434,12 +438,12 @@ unsigned int paging_pending_requests_nr(struct gsm_bts *bts)
/**
* Find any paging data for the given subscriber at the given BTS.
*/
-void *paging_get_data(struct gsm_bts *bts, struct gsm_subscriber *subscr)
+void *paging_get_data(struct gsm_bts *bts, struct bsc_subscr *bsub)
{
struct gsm_paging_request *req;
llist_for_each_entry(req, &bts->paging.pending_requests, entry)
- if (req->subscr == subscr)
+ if (req->bsub == bsub)
return req->cbfn_param;
return NULL;