gsup_client_mux_tx_error_reply(): fix: do not omit session IEs
For SS/USSD, it's important to have both session state and ID IEs.
Found using the new TC_mt_ussd_for_unknown_subscr test case.
Change-Id: I57317a7b8036d1ffd36e2021efc146db4633da84
Related: (TTCN-3) Id35cd3ec15d1bab15260312d7bbb41e2d10349fe
Related: OS#2931
diff --git a/src/libmsc/gsup_client_mux.c b/src/libmsc/gsup_client_mux.c
index 292c2a9..8c80a6b 100644
--- a/src/libmsc/gsup_client_mux.c
+++ b/src/libmsc/gsup_client_mux.c
@@ -157,6 +157,12 @@
OSMO_STRLCPY_ARRAY(gsup_reply.imsi, gsup_orig->imsi);
+ /* For SS/USSD, it's important to keep both session state and ID IEs */
+ if (gsup_orig->session_state != OSMO_GSUP_SESSION_STATE_NONE) {
+ gsup_reply.session_state = OSMO_GSUP_SESSION_STATE_END;
+ gsup_reply.session_id = gsup_orig->session_id;
+ }
+
if (osmo_gsup_client_enc_send(gcm->gsup_client, &gsup_reply))
LOGP(DLGSUP, LOGL_ERROR, "Failed to send Error reply (imsi=%s)\n",
osmo_quote_str(gsup_orig->imsi, -1));