diff --git a/openbsc/src/bsc_rll.c b/openbsc/src/bsc_rll.c
new file mode 100644
index 0000000..09c3bc2
--- /dev/null
+++ b/openbsc/src/bsc_rll.c
@@ -0,0 +1,104 @@
+/* GSM BSC Radio Link Layer API
+ * 3GPP TS 08.58 version 8.6.0 Release 1999 / ETSI TS 100 596 V8.6.0 */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <errno.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/talloc.h>
+#include <openbsc/timer.h>
+#include <openbsc/linuxlist.h>
+#include <openbsc/bsc_rll.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/chan_alloc.h>
+#include <openbsc/abis_rsl.h>
+
+struct bsc_rll_req {
+	struct llist_head list;
+	struct timer_list timer;
+
+	struct gsm_lchan *lchan;
+	u_int8_t link_id;
+
+	void (*cb)(struct gsm_lchan *lchan, u_int8_t link_id,
+		   void *data, enum bsc_rllr_ind);
+	void *data;
+};
+
+/* we only compare C1, C2 and SAPI */
+#define LINKID_MASK	0xC7
+
+static LLIST_HEAD(bsc_rll_reqs);
+
+static void complete_rllr(struct bsc_rll_req *rllr, enum bsc_rllr_ind type)
+{
+	llist_del(&rllr->list);
+	put_lchan(rllr->lchan);
+	rllr->cb(rllr->lchan, rllr->link_id, rllr->data, type);
+	talloc_free(rllr);
+}
+
+static void timer_cb(void *_rllr)
+{
+	struct bsc_rll_req *rllr = _rllr;
+
+	complete_rllr(rllr, BSC_RLLR_IND_TIMEOUT);
+}
+
+/* establish a RLL connection with given SAPI / priority */
+int rll_establish(struct gsm_lchan *lchan, u_int8_t link_id,
+		  void (*cb)(struct gsm_lchan *, u_int8_t, void *,
+			     enum bsc_rllr_ind),
+		  void *data)
+{
+	struct bsc_rll_req *rllr = talloc_zero(tall_bsc_ctx, struct bsc_rll_req);
+	if (!rllr)
+		return -ENOMEM;
+
+	use_lchan(lchan);
+	rllr->lchan = lchan;
+	rllr->link_id = link_id;
+	rllr->cb = cb;
+	rllr->data = data;
+
+	rllr->timer.cb = &timer_cb;
+	/* start some timer? */
+	bsc_schedule_timer(&rllr->timer, 10, 0);
+
+	/* send the RSL RLL ESTablish REQuest */
+	return rsl_establish_request(rllr->lchan, rllr->link_id);
+}
+
+/* Called from RSL code in case we have received an indication regarding
+ * any RLL link */
+void rll_indication(struct gsm_lchan *lchan, u_int8_t link_id, u_int8_t type)
+{
+	struct bsc_rll_req *rllr, *rllr2;
+
+	llist_for_each_entry_safe(rllr, rllr2, &bsc_rll_reqs, list) {
+		if (rllr->lchan == lchan &&
+		    (rllr->link_id & LINKID_MASK) == (link_id & LINKID_MASK)) {
+			complete_rllr(rllr, type);
+			return;
+		}
+	}
+}