handover_fsm: send HANDOVER PERFORMED msg on internal ho
When an internal handover is done the specification demands to inform the MSC about the event. - Add sending of BSSMAP HANDOVER PERFORMED msg. Change-Id: If26e5807280e0f75a423b3b04f8e3c698c82a351 Depends: libosmocore I825106858bd89afc9837811b8fed2e8accc82441 Related: OS#3645
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@ -670,6 +670,70 @@ static int result_counter(enum handover_scope scope, enum handover_result result
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}
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}
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static void send_handover_performed(struct gsm_subscriber_connection *conn)
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{
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struct gsm_lchan *lchan = conn->lchan;
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struct handover *ho = &conn->ho;
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struct osmo_cell_global_id *cell;
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struct gsm0808_handover_performed ho_perf_params = {};
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struct msgb *msg;
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struct gsm0808_speech_codec sc;
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int rc;
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/* Cause 3.2.2.5 */
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ho_perf_params.cause = GSM0808_CAUSE_HANDOVER_SUCCESSFUL;
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/* Cell Identifier 3.2.2.17 */
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cell = cgi_for_msc(conn->sccp.msc, conn_get_bts(conn));
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if (!cell) {
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LOG_HO(conn, LOGL_ERROR, "Failed to generate Cell Identifier IE, can't send HANDOVER PERFORMED!\n");
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return;
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}
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ho_perf_params.cell_id = (struct gsm0808_cell_id){
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.id_discr = CELL_IDENT_WHOLE_GLOBAL,
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.id.global = *cell
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};
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/* Chosen Channel 3.2.2.33 */
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ho_perf_params.chosen_channel = gsm0808_chosen_channel(lchan->type, lchan->tch_mode);
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if (!ho_perf_params.chosen_channel) {
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LOG_HO(conn, LOGL_ERROR, "Failed to generate Chosen Channel IE, can't send HANDOVER PERFORMED!\n");
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return;
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}
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ho_perf_params.chosen_channel_present = true;
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/* Chosen Encryption Algorithm 3.2.2.44 */
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ho_perf_params.chosen_encr_alg = lchan->encr.alg_id;
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ho_perf_params.chosen_encr_alg_present = true;
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if (ho->new_lchan->activate.requires_voice_stream) {
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/* Speech Version (chosen) 3.2.2.51 */
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ho_perf_params.speech_version_chosen = gsm0808_permitted_speech(lchan->type, lchan->tch_mode);
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ho_perf_params.speech_version_chosen_present = true;
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/* Speech Codec (chosen) 3.2.2.104 */
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if (gscon_is_aoip(conn)) {
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/* Extrapolate speech codec from speech mode */
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gsm0808_speech_codec_from_chan_type(&sc, ho_perf_params.speech_version_chosen);
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sc.cfg = conn->assignment.req.s15_s0;
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memcpy(&ho_perf_params.speech_codec_chosen, &sc, sizeof(sc));
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ho_perf_params.speech_codec_chosen_present = true;
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}
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}
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msg = gsm0808_create_handover_performed(&ho_perf_params);
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if (!msg) {
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LOG_HO(conn, LOGL_ERROR, "Failed to generate message, can't send HANDOVER PERFORMED!\n");
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return;
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}
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rc = gscon_sigtran_send(conn, msg);
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if (rc < 0) {
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LOG_HO(conn, LOGL_ERROR, "message sending failed, can't send HANDOVER PERFORMED!\n");
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return;
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}
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}
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/* Notify the handover decision algorithm of failure and clear out any handover state. */
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void handover_end(struct gsm_subscriber_connection *conn, enum handover_result result)
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{
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@ -738,6 +802,10 @@ void handover_end(struct gsm_subscriber_connection *conn, enum handover_result r
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if (result == HO_RESULT_OK)
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conn->ho.created_ci_for_msc = NULL;
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/* If the performed handover was an INTRA BSC HANDOVER, inform the MSC that a handover has happend */
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if (result == HO_RESULT_OK && ((ho->scope & HO_INTRA_CELL) || (ho->scope & HO_INTRA_BSC)))
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send_handover_performed(conn);
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hdc = handover_decision_callbacks_get(ho->from_hodec_id);
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if (hdc && hdc->on_handover_end)
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hdc->on_handover_end(conn, result);
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@ -219,6 +219,7 @@ static struct gsm_bts *create_bts(int arfcn)
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void create_conn(struct gsm_lchan *lchan)
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{
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static struct bsc_msc_data fake_msc_data = {};
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fake_msc_data.network = bsc_gsmnet;
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static unsigned int next_imsi = 0;
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char imsi[sizeof(lchan->conn->bsub->imsi)];
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struct gsm_network *net = lchan->ts->trx->bts->network;
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