bsc/ussd: Optionally send USSD message on MSC disconnection
Send an USSD message on each MS connection if the connection to
the MSC has been lost.
Add a vty config command 'bsc-msc-loss-txt' in 'config-msc' to set
the notification string and to enable the feature.
Ticket: OW#957
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_sccp.c b/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
index 3533d6d..ad554e8 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
@@ -262,13 +262,35 @@
return 0;
}
-static void bsc_close_connections(struct bsc_msc_connection *msc_con)
+static void bsc_notify_msc_lost(struct osmo_bsc_sccp_con *con)
+{
+ struct gsm_subscriber_connection *conn = con->conn;
+
+ /* send USSD notification if string configured and con->data is set */
+ if (!conn)
+ return;
+
+ /* check for config string */
+ if (!con->msc->ussd_msc_lost_txt)
+ return;
+ if (con->msc->ussd_msc_lost_txt[0] == '\0')
+ return;
+
+ /* send USSD notification */
+ gsm0480_send_ussdNotify(conn, 1, conn->sccp_con->msc->ussd_welcome_txt);
+ gsm0480_send_releaseComplete(conn);
+}
+
+static void bsc_notify_and_close_conns(struct bsc_msc_connection *msc_con)
{
struct osmo_bsc_sccp_con *con, *tmp;
llist_for_each_entry_safe(con, tmp, &active_connections, entry) {
- if (con->msc->msc_con == msc_con)
- bsc_sccp_force_free(con);
+ if (con->msc->msc_con != msc_con)
+ continue;
+
+ bsc_notify_msc_lost(con);
+ bsc_sccp_force_free(con);
}
}
@@ -282,7 +304,7 @@
msc = signal_data;
if (signal == S_MSC_LOST)
- bsc_close_connections(msc->data->msc_con);
+ bsc_notify_and_close_conns(msc->data->msc_con);
return 0;
}
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_vty.c b/openbsc/src/osmo-bsc/osmo_bsc_vty.c
index 49ae665..501d9f5 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_vty.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_vty.c
@@ -114,6 +114,11 @@
if (msc->ussd_welcome_txt)
vty_out(vty, " bsc-welcome-text %s%s", msc->ussd_welcome_txt, VTY_NEWLINE);
+ if (msc->ussd_msc_lost_txt && msc->ussd_msc_lost_txt[0])
+ vty_out(vty, " bsc-msc-lost-text %s%s", msc->ussd_msc_lost_txt, VTY_NEWLINE);
+ else
+ vty_out(vty, " no bsc-msc-lost-text%s", VTY_NEWLINE);
+
if (msc->audio_length != 0) {
int i;
@@ -368,6 +373,34 @@
return CMD_SUCCESS;
}
+DEFUN(cfg_net_msc_lost_ussd,
+ cfg_net_msc_lost_ussd_cmd,
+ "bsc-msc-lost-text .TEXT",
+ "Set the USSD notification to be sent on MSC connection loss\n" "Text to be sent\n")
+{
+ struct osmo_msc_data *data = osmo_msc_data(vty);
+ char *str = argv_concat(argv, argc, 0);
+ if (!str)
+ return CMD_WARNING;
+
+ bsc_replace_string(osmo_bsc_data(vty), &data->ussd_msc_lost_txt, str);
+ talloc_free(str);
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_net_msc_no_lost_ussd,
+ cfg_net_msc_no_lost_ussd_cmd,
+ "no bsc-msc-lost-text",
+ NO_STR "Clear the USSD notification to be sent on MSC connection loss\n")
+{
+ struct osmo_msc_data *data = osmo_msc_data(vty);
+
+ talloc_free(data->ussd_msc_lost_txt);
+ data->ussd_msc_lost_txt = 0;
+
+ return CMD_SUCCESS;
+}
+
DEFUN(cfg_net_msc_type,
cfg_net_msc_type_cmd,
"type (normal|local)",
@@ -579,6 +612,8 @@
install_element(MSC_NODE, &cfg_net_msc_ping_time_cmd);
install_element(MSC_NODE, &cfg_net_msc_pong_time_cmd);
install_element(MSC_NODE, &cfg_net_msc_welcome_ussd_cmd);
+ install_element(MSC_NODE, &cfg_net_msc_lost_ussd_cmd);
+ install_element(MSC_NODE, &cfg_net_msc_no_lost_ussd_cmd);
install_element(MSC_NODE, &cfg_net_msc_type_cmd);
install_element(MSC_NODE, &cfg_net_msc_emerg_cmd);
install_element(MSC_NODE, &cfg_net_msc_local_prefix_cmd);