コード例 #1
0
ファイル: gsm_04_08_utils.c プロジェクト: janfizza/openbsc
static int gsm48_sendmsg(struct msgb *msg)
{
	if (msg->lchan)
		msg->dst = msg->lchan->ts->trx->rsl_link;

	msg->l3h = msg->data;
	return rsl_data_request(msg, 0);
}
コード例 #2
0
ファイル: bsc_api.c プロジェクト: YBouzid/openbsc
/*! \brief process incoming 08.08 DTAP from MSC (send via BTS to MS) */
int gsm0808_submit_dtap(struct gsm_subscriber_connection *conn,
			struct msgb *msg, int link_id, int allow_sacch)
{
	uint8_t sapi;


	if (!conn->lchan) {
		LOGP(DMSC, LOGL_ERROR,
		     "Called submit dtap without an lchan.\n");
		msgb_free(msg);
		return -1;
	}

	sapi = link_id & 0x7;
	msg->lchan = conn->lchan;
	msg->dst = msg->lchan->ts->trx->rsl_link;

	/* If we are on a TCH and need to submit a SMS (on SAPI=3) we need to use the SACH */
	if (allow_sacch && sapi != 0) {
		if (conn->lchan->type == GSM_LCHAN_TCH_F || conn->lchan->type == GSM_LCHAN_TCH_H)
			link_id |= 0x40;
	}

	msg->l3h = msg->data;
	/* is requested SAPI already up? */
	if (conn->lchan->sapis[sapi] == LCHAN_SAPI_UNUSED) {
		/* Establish L2 for additional SAPI */
		OBSC_LINKID_CB(msg) = link_id;
		if (rll_establish(msg->lchan, sapi, rll_ind_cb, msg) != 0) {
			msgb_free(msg);
			send_sapi_reject(conn, link_id);
			return -1;
		}
		return 0;
	} else {
		/* Directly forward via RLL/RSL to BTS */
		return rsl_data_request(msg, link_id);
	}
}
コード例 #3
0
ファイル: bsc_api.c プロジェクト: YBouzid/openbsc
static void rll_ind_cb(struct gsm_lchan *lchan, uint8_t link_id, void *_data, enum bsc_rllr_ind rllr_ind)
{
	struct msgb *msg = _data;

	/*
	 * There seems to be a small window that the RLL timer can
	 * fire after a lchan_release call and before the S_CHALLOC_FREED
	 * is called. Check if a conn is set before proceeding.
	 */
	if (!lchan->conn)
		return;

	switch (rllr_ind) {
	case BSC_RLLR_IND_EST_CONF:
		rsl_data_request(msg, OBSC_LINKID_CB(msg));
		break;
	case BSC_RLLR_IND_REL_IND:
	case BSC_RLLR_IND_ERR_IND:
	case BSC_RLLR_IND_TIMEOUT:
		send_sapi_reject(lchan->conn, OBSC_LINKID_CB(msg));
		msgb_free(msg);
		break;
	}
}