static void handle_release(struct gsm_subscriber_connection *conn,
struct bsc_api *bsc, struct gsm_lchan *lchan)
{
int destruct = 1;
if (conn->secondary_lchan == lchan) {
osmo_timer_del(&conn->T10);
conn->secondary_lchan = NULL;
bsc->assign_fail(conn,
GSM0808_CAUSE_RADIO_INTERFACE_FAILURE,
NULL);
}
/* clear the connection now */
if (bsc->clear_request)
destruct = bsc->clear_request(conn, 0);
/* now give up all channels */
if (conn->lchan == lchan)
conn->lchan = NULL;
if (conn->ho_lchan == lchan) {
bsc_clear_handover(conn, 0);
conn->ho_lchan = NULL;
}
lchan->conn = NULL;
gsm0808_clear(conn);
if (destruct)
subscr_con_free(conn);
}
/* lchan release handling */
void msc_release_connection(struct gsm_subscriber_connection *conn)
{
/* skip when we are in release, e.g. due an error */
if (conn->in_release)
return;
/* skip releasing of silent calls as they have no transaction */
if (conn->silent_call)
return;
/* check if there is a pending operation */
if (conn->loc_operation || conn->sec_operation || conn->anch_operation)
return;
if (trans_has_conn(conn))
return;
/* no more connections, asking to release the channel */
/*
* We had stopped the LU expire timer T3212. Now we are about
* to send the MS back to the idle state and this should lead
* to restarting the timer. Set the new expiration time.
*/
if (conn->expire_timer_stopped)
subscr_update_expire_lu(conn->subscr, conn->bts);
conn->in_release = 1;
gsm0808_clear(conn);
if (conn->put_channel) {
conn->put_channel = 0;
subscr_put_channel(conn->subscr);
}
subscr_con_free(conn);
}
/*! \brief RSL has received a DATA INDICATION with L3 from MS */
int gsm0408_rcvmsg(struct msgb *msg, uint8_t link_id)
{
int rc;
struct bsc_api *api = msg->lchan->ts->trx->bts->network->bsc_api;
struct gsm_lchan *lchan;
lchan = msg->lchan;
if (lchan->state != LCHAN_S_ACTIVE) {
LOGP(DRSL, LOGL_INFO, "Got data in non active state(%s), "
"discarding.\n", gsm_lchans_name(lchan->state));
return -1;
}
if (lchan->conn) {
/* if we already have a connection, forward via DTAP to
* MSC */
dispatch_dtap(lchan->conn, link_id, msg);
} else {
/* allocate a new connection */
rc = BSC_API_CONN_POL_REJECT;
lchan->conn = subscr_con_allocate(msg->lchan);
if (!lchan->conn) {
lchan_release(lchan, 1, 0);
return -1;
}
/* fwd via bsc_api to send COMPLETE L3 INFO to MSC */
rc = api->compl_l3(lchan->conn, msg, 0);
if (rc != BSC_API_CONN_POL_ACCEPT) {
lchan->conn->lchan = NULL;
subscr_con_free(lchan->conn);
lchan_release(lchan, 1, 0);
}
}
return 0;
}
/*
* GSM 08.08 § 3.1.9.1 and 3.2.1.21...
* release our gsm_subscriber_connection and send message
*/
static int bssmap_handle_clear_command(struct osmo_bsc_sccp_con *conn,
struct msgb *msg, unsigned int payload_length)
{
struct msgb *resp;
/* TODO: handle the cause of this package */
if (conn->conn) {
LOGP(DMSC, LOGL_INFO, "Releasing all transactions on %p\n", conn);
gsm0808_clear(conn->conn);
subscr_con_free(conn->conn);
conn->conn = NULL;
}
/* send the clear complete message */
resp = gsm0808_create_clear_complete();
if (!resp) {
LOGP(DMSC, LOGL_ERROR, "Sending clear complete failed.\n");
return -1;
}
bsc_queue_for_msc(conn, resp);
return 0;
}