SMS-over-GSUP: notify sender about unhandled GSUP messages
Change-Id: I7970349bd9d5c56a64c409e619e8b581682fef0b
diff --git a/src/libmsc/gsm_04_11_gsup.c b/src/libmsc/gsm_04_11_gsup.c
index a24c617..cf9d11d 100644
--- a/src/libmsc/gsm_04_11_gsup.c
+++ b/src/libmsc/gsm_04_11_gsup.c
@@ -315,6 +315,7 @@
default:
LOGP(DMM, LOGL_ERROR, "No handler found for %s, dropping message...\n",
osmo_gsup_message_type_name(gsup_msg->message_type));
+ gsup_client_mux_tx_error_reply(gcm, gsup_msg, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
rc = -GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL;
}