libmsc/gsm_09_11.c: properly handle OSMO_GSUP_MSGT_PROC_SS_ERROR
This message can be used by the HLR/EUSE to indicate that something went wrong, e.g. the connection with EUSE is lost, EUSE or the MS did not respond in time, etc. OsmoMSC needs to release the SS/USSD transaction, and send GSM 04.80 RELEASE COMPLETE message to the MS if there is an active RAN connection. Change-Id: I076d12ef24d7320eda1df1ee4588da7375ef3d9e Related: (TTCN-3) I5586a88136c936441a842f49248824680603672e Related: OS#2931
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@ -436,14 +436,36 @@ int gsm0911_gsup_rx(struct gsup_client_mux *gcm, void *data, const struct osmo_g
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/* Associate logging messages with this subscriber */
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log_set_context(LOG_CTX_VLR_SUBSCR, vsub);
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/* Attempt to find DTAP-transaction */
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trans = trans_find_by_callref(net, gsup_msg->session_id);
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/* Handle errors */
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if (OSMO_GSUP_IS_MSGT_ERROR(gsup_msg->message_type)) {
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/* FIXME: handle this error somehow! */
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LOGP(DSS, LOGL_NOTICE, "Rx %s from HLR/EUSE (cause=0x%02x, sid=0x%x)\n",
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osmo_gsup_message_type_name(gsup_msg->message_type),
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gsup_msg->cause, gsup_msg->session_id);
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if (!trans) {
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LOGP(DSS, LOGL_ERROR, "No transaction found for "
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"sid=0x%x, nothing to abort\n", gsup_msg->session_id);
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return -ENODEV;
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}
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LOG_TRANS(trans, LOGL_NOTICE, "Aborting the session: sending RELEASE COMPLETE\n");
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/* Indicate connection release to subscriber (if active) */
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if (trans->msc_a != NULL) {
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/* TODO: implement GSUP - GSM 04.80 cause mapping */
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msc_send_ussd_release_complete_cause(trans->msc_a, trans->transaction_id,
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GSM48_CAUSE_LOC_PUN_S_LU, GSM48_CC_CAUSE_TEMP_FAILURE);
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}
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/* Terminate transaction */
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trans_free(trans);
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return 0;
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}
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/* Attempt to find DTAP-transaction */
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trans = trans_find_by_callref(net, gsup_msg->session_id);
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if (!trans) {
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/* Count network-initiated attempts to establish a NC SS/USSD session */
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rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_NC_SS_MT_REQUESTS]);
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