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-rw-r--r--include/osmocom/bsc/osmo_bsc_grace.h3
-rw-r--r--src/osmo-bsc/osmo_bsc_bssap.c47
-rw-r--r--src/osmo-bsc/osmo_bsc_grace.c60
3 files changed, 79 insertions, 31 deletions
diff --git a/include/osmocom/bsc/osmo_bsc_grace.h b/include/osmocom/bsc/osmo_bsc_grace.h
index b7950ce50..d78e41c82 100644
--- a/include/osmocom/bsc/osmo_bsc_grace.h
+++ b/include/osmocom/bsc/osmo_bsc_grace.h
@@ -30,6 +30,7 @@ int bsc_grace_allow_new_connection(struct gsm_network *net, struct gsm_bts *bts)
int bsc_grace_paging_request(enum signal_rf rf_policy,
struct bsc_subscr *subscr,
int chan_needed,
- struct bsc_msc_data *msc);
+ struct bsc_msc_data *msc,
+ struct gsm_bts *bts);
#endif
diff --git a/src/osmo-bsc/osmo_bsc_bssap.c b/src/osmo-bsc/osmo_bsc_bssap.c
index ada4b66f1..a02ea9e81 100644
--- a/src/osmo-bsc/osmo_bsc_bssap.c
+++ b/src/osmo-bsc/osmo_bsc_bssap.c
@@ -228,11 +228,12 @@ static int bssmap_handle_reset(struct bsc_msc_data *msc,
return 0;
}
-/* Page a subscriber based on TMSI and LAC.
+/* Page a subscriber based on TMSI and LAC in the specified MSC.
+ * If BTS is not NULL, page the subscriber via this particular BTS.
* A non-zero return value indicates a fatal out of memory condition. */
static int
-page_subscriber(struct bsc_msc_data *msc, uint32_t tmsi, uint32_t lac,
- const char *mi_string, uint8_t chan_needed)
+page_subscriber(struct bsc_msc_data *msc, struct gsm_bts *bts,
+ uint32_t tmsi, uint32_t lac, const char *mi_string, uint8_t chan_needed)
{
struct bsc_subscr *subscr;
@@ -246,9 +247,14 @@ page_subscriber(struct bsc_msc_data *msc, uint32_t tmsi, uint32_t lac,
subscr->lac = lac;
subscr->tmsi = tmsi;
- LOGP(DMSC, LOGL_INFO, "Paging request from MSC IMSI: '%s' TMSI: '0x%x/%u' LAC: 0x%x\n", mi_string, tmsi, tmsi, lac);
+ if (bts)
+ LOGP(DMSC, LOGL_INFO, "Paging request from MSC BTS: %d IMSI: '%s' TMSI: '0x%x/%u' LAC: 0x%x\n",
+ bts->nr, mi_string, tmsi, tmsi, lac);
+ else
+ LOGP(DMSC, LOGL_INFO, "Paging request from MSC IMSI: '%s' TMSI: '0x%x/%u' LAC: 0x%x\n", mi_string, tmsi, tmsi, lac);
+
bsc_grace_paging_request(msc->network->bsc_data->rf_ctrl->policy,
- subscr, chan_needed, msc);
+ subscr, chan_needed, msc, bts);
/* the paging code has grabbed its own references */
bsc_subscr_put(subscr);
@@ -343,6 +349,29 @@ static int bssmap_handle_paging(struct bsc_msc_data *msc,
LOGP(DMSC, LOGL_NOTICE, "Ignoring no-op paging request for IMSI %s\n", mi_string);
return 0; /* nothing to do */
+ case CELL_IDENT_CI: {
+ uint16_t *ci_be = (uint16_t *)(&data[1]);
+ while (remain >= sizeof(*ci_be)) {
+ uint16_t ci = osmo_load16be(ci_be);
+ struct gsm_bts *bts;
+
+ llist_for_each_entry(bts, &msc->network->bts_list, list) {
+ if (bts->cell_identity == ci)
+ break;
+ }
+
+ if (bts) {
+ if (page_subscriber(msc, bts, tmsi, lac, mi_string, chan_needed) != 0)
+ break;
+ } else
+ LOGP(DMSC, LOGL_ERROR, "Paging IMSI %s: BTS with cell identifier %d not found\n",
+ mi_string, ci);
+ remain -= sizeof(*ci_be);
+ ci_be++;
+ }
+ break;
+ }
+
case CELL_IDENT_LAI_AND_LAC: {
struct gsm48_loc_area_id lai;
int i = 0;
@@ -358,7 +387,7 @@ static int bssmap_handle_paging(struct bsc_msc_data *msc,
break;
}
if (mcc == msc->network->country_code && mnc == msc->network->network_code) {
- if (page_subscriber(msc, tmsi, lac, mi_string, chan_needed) != 0)
+ if (page_subscriber(msc, NULL, tmsi, lac, mi_string, chan_needed) != 0)
break;
} else
LOGP(DMSC, LOGL_DEBUG, "Not paging IMSI %s: MCC/MNC in Cell Identifier List "
@@ -375,7 +404,7 @@ static int bssmap_handle_paging(struct bsc_msc_data *msc,
lacp_be = (uint16_t *)(&data[1]);
while (remain >= sizeof(*lacp_be)) {
lac = osmo_load16be(lacp_be);
- if (page_subscriber(msc, tmsi, lac, mi_string, chan_needed) != 0)
+ if (page_subscriber(msc, NULL, tmsi, lac, mi_string, chan_needed) != 0)
break;
remain -= sizeof(*lacp_be);
lacp_be++;
@@ -388,7 +417,7 @@ static int bssmap_handle_paging(struct bsc_msc_data *msc,
" has invalid length: %u, paging entire BSS anyway (%s)\n",
mi_string, CELL_IDENT_BSS, data_length, osmo_hexdump(data, data_length));
}
- if (page_subscriber(msc, tmsi, GSM_LAC_RESERVED_ALL_BTS, mi_string, chan_needed) != 0)
+ if (page_subscriber(msc, NULL, tmsi, GSM_LAC_RESERVED_ALL_BTS, mi_string, chan_needed) != 0)
break;
break;
@@ -396,7 +425,7 @@ static int bssmap_handle_paging(struct bsc_msc_data *msc,
LOGP(DMSC, LOGL_NOTICE, "Paging IMSI %s: unimplemented Cell Identifier List (0x%x),"
" paging entire BSS instead (%s)\n",
mi_string, cell_ident, osmo_hexdump(data, data_length));
- if (page_subscriber(msc, tmsi, GSM_LAC_RESERVED_ALL_BTS, mi_string, chan_needed) != 0)
+ if (page_subscriber(msc, NULL, tmsi, GSM_LAC_RESERVED_ALL_BTS, mi_string, chan_needed) != 0)
break;
break;
}
diff --git a/src/osmo-bsc/osmo_bsc_grace.c b/src/osmo-bsc/osmo_bsc_grace.c
index f16a19a6d..93ca9b93e 100644
--- a/src/osmo-bsc/osmo_bsc_grace.c
+++ b/src/osmo-bsc/osmo_bsc_grace.c
@@ -50,44 +50,62 @@ static int normal_paging(struct bsc_subscr *subscr, int chan_needed,
return paging_request(msc->network, subscr, chan_needed, msc);
}
+/* Return value is like paging_request_bts():
+ * returns 1 on success (one BTS was paged); 0 in case of error (e.g. TRX down) */
+static int locked_paging_bts(struct gsm_bts *bts,
+ struct bsc_subscr *subscr,
+ int chan_needed,
+ struct bsc_msc_data *msc)
+{
+ /* Return error if the BTS is not excluded from the lock. */
+ if (!bts->excl_from_rf_lock)
+ return 0;
+
+ /* in case of no lac patching is in place, check the BTS */
+ if (msc->core_lac == -1 && subscr->lac != bts->location_area_code)
+ return 0;
+
+ return paging_request_bts(bts, subscr, chan_needed, msc);
+}
+
static int locked_paging(struct bsc_subscr *subscr, int chan_needed,
struct bsc_msc_data *msc)
{
struct gsm_bts *bts = NULL;
+ int num_pages = 0;
/*
* Check if there is any BTS that is on for the given lac. Start
* with NULL and iterate through all bts.
+ * All other bts are either off or in the grace period.
*/
- llist_for_each_entry(bts, &msc->network->bts_list, list) {
- /*
- * continue if the BTS is not excluded from the lock
- */
- if (!bts->excl_from_rf_lock)
- continue;
-
- /* in case of no lac patching is in place, check the BTS */
- if (msc->core_lac == -1 && subscr->lac != bts->location_area_code)
- continue;
-
- /*
- * now page on this bts
- */
- paging_request_bts(bts, subscr, chan_needed, msc);
- };
-
- /* All bts are either off or in the grace period */
- return 0;
+ llist_for_each_entry(bts, &msc->network->bts_list, list)
+ num_pages += locked_paging_bts(bts, subscr, chan_needed, msc);
+
+ return num_pages;
}
/**
- * Try to not page if everything the cell is not on.
+ * Page a subscriber in an MSC.
+ * \param[in] rf_policy if not S_RF_ON, page only BTSs which are not excluded from the RF lock
+ * \param[in] subscr subscriber we want to page
+ * \param[in] chan_needed value of the GSM0808_IE_CHANNEL_NEEDED IE
+ * \param[in] msc MSC which has issued this paging
+ * \param[in] bts if not NULL, page via this particular BTS
+ * \returns number of BTS on which we issued the paging
*/
int bsc_grace_paging_request(enum signal_rf rf_policy,
struct bsc_subscr *subscr,
int chan_needed,
- struct bsc_msc_data *msc)
+ struct bsc_msc_data *msc,
+ struct gsm_bts *bts)
{
+ if (bts) {
+ if (rf_policy == S_RF_ON)
+ return paging_request_bts(bts, subscr, chan_needed, msc);
+ return locked_paging_bts(bts, subscr, chan_needed, msc);
+ }
+
if (rf_policy == S_RF_ON)
return normal_paging(subscr, chan_needed, msc);
return locked_paging(subscr, chan_needed, msc);
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-27 08:00:57 +0000