nat/ussd: Add 'show ussd-connection' vty command
This command returns the current state of the connection to the USSD
side channel provider. It shows whether a provider has been connected
and authorized or not.
Fixes: OW#953
diff --git a/openbsc/src/osmo-bsc_nat/bsc_ussd.c b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
index f7753fb..d422f9e 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_ussd.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
@@ -69,6 +69,20 @@
talloc_free(con);
}
+static void ussd_pong(struct bsc_nat_ussd_con *conn)
+{
+ struct msgb *msg;
+
+ msg = msgb_alloc_headroom(4096, 128, "pong message");
+ if (!msg) {
+ LOGP(DNAT, LOGL_ERROR, "Failed to allocate pong msg\n");
+ return;
+ }
+
+ msgb_v_put(msg, IPAC_MSGT_PONG);
+ bsc_do_write(&conn->queue, msg, IPAC_PROTO_IPACCESS);
+}
+
static int forward_sccp(struct bsc_nat *nat, struct msgb *msg)
{
struct nat_sccp_connection *con;
@@ -133,6 +147,11 @@
}
if (TLVP_PRESENT(&tvp, IPAC_IDTAG_UNITNAME))
ussd_auth_con(&tvp, conn);
+ } else if (msg->l2h[0] == IPAC_MSGT_PING) {
+ LOGP(DNAT, LOGL_DEBUG, "Got USSD ping request.\n");
+ ussd_pong(conn);
+ } else {
+ LOGP(DNAT, LOGL_NOTICE, "Got unknown IPACCESS message 0x%02x.\n", msg->l2h[0]);
}
msgb_free(msg);