ussd: Send USSD on call setup on MSC errors
Send an USSD message to the mobile station requesting a connection
for a call or a SMS when the link to the MSC is down or in the
grace period.
The messages can be set (and this feature activated) by setting
bsc/missing-msc-text resp. msc/bsc-grace-text via the vty.
The generation of both messages has been tested manually.
Ticket: OW#957
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_sccp.c b/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
index 87f415e..aa8c79c 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
@@ -188,35 +188,35 @@
return 0;
}
-int bsc_create_new_connection(struct gsm_subscriber_connection *conn,
+enum bsc_con bsc_create_new_connection(struct gsm_subscriber_connection *conn,
struct osmo_msc_data *msc)
{
struct osmo_bsc_sccp_con *bsc_con;
struct sccp_connection *sccp;
/* This should not trigger */
- if (!msc->msc_con->is_authenticated) {
+ if (!msc || !msc->msc_con->is_authenticated) {
LOGP(DMSC, LOGL_ERROR,
"How did this happen? MSC is not connected. Dropping.\n");
- return -1;
+ return BSC_CON_REJECT_NO_LINK;
}
if (!bsc_grace_allow_new_connection(conn->bts->network, conn->bts)) {
LOGP(DMSC, LOGL_NOTICE, "BSC in grace period. No new connections.\n");
- return -1;
+ return BSC_CON_REJECT_RF_GRACE;
}
sccp = sccp_connection_socket();
if (!sccp) {
LOGP(DMSC, LOGL_ERROR, "Failed to allocate memory.\n");
- return -ENOMEM;
+ return BSC_CON_NO_MEM;
}
bsc_con = talloc_zero(conn->bts, struct osmo_bsc_sccp_con);
if (!bsc_con) {
LOGP(DMSC, LOGL_ERROR, "Failed to allocate.\n");
sccp_connection_free(sccp);
- return -1;
+ return BSC_CON_NO_MEM;
}
/* callbacks */
@@ -237,7 +237,7 @@
bsc_con->conn = conn;
llist_add_tail(&bsc_con->entry, &active_connections);
conn->sccp_con = bsc_con;
- return 0;
+ return BSC_CON_SUCCESS;
}
int bsc_open_connection(struct osmo_bsc_sccp_con *conn, struct msgb *msg)