layer23: Split [1/2] -> The source code

We split into :
 - common: Everything that can be shared
 - mobile: The real spec compliant mobile phones
 - misc:   Different test stuff

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

1 files changed, 156 insertions, 0 deletions

diff --git a/src/host/layer23/src/misc/rslms.c b/src/host/layer23/src/misc/rslms.c
new file mode 100644
index 00000000..90920787
--- /dev/null
+++ b/src/host/layer23/src/misc/rslms.c
@@ -0,0 +1,156 @@
+/* RSLms - GSM 08.58 like protocol between L2 and L3 of GSM Um interface */
+
+/* (C) 2010 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 <stdint.h>
+#include <errno.h>
+#include <stdio.h>
+
+#include <osmocore/msgb.h>
+#include <osmocore/rsl.h>
+#include <osmocore/tlv.h>
+#include <osmocore/protocol/gsm_04_08.h>
+
+#include <osmocom/logging.h>
+#include <osmocom/lapdm.h>
+#include <osmocom/rslms.h>
+#include <osmocom/layer3.h>
+#include <osmocom/osmocom_data.h>
+#include <osmocom/l1ctl.h>
+
+/* Send a 'simple' RLL request to L2 */
+int rslms_tx_rll_req(struct osmocom_ms *ms, uint8_t msg_type,
+		     uint8_t chan_nr, uint8_t link_id)
+{
+	struct msgb *msg;
+
+	msg = rsl_rll_simple(msg_type, chan_nr, link_id, 1);
+
+	return rslms_recvmsg(msg, ms);
+}
+
+/* Send a RLL request (including L3 info) to L2 */
+int rslms_tx_rll_req_l3(struct osmocom_ms *ms, uint8_t msg_type,
+			uint8_t chan_nr, uint8_t link_id, struct msgb *msg)
+{
+	rsl_rll_push_l3(msg, msg_type, chan_nr, link_id, 1);
+
+	return rslms_recvmsg(msg, ms);
+}
+
+static int ccch_enabled = 0;
+static int rach_count = 0;
+
+static int rslms_rx_udata_ind(struct msgb *msg, struct osmocom_ms *ms)
+{
+	struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
+	struct tlv_parsed tv;
+	int rc = 0;
+	
+	DEBUGP(DRSL, "RSLms UNIT DATA IND chan_nr=0x%02x link_id=0x%02x\n",
+		rllh->chan_nr, rllh->link_id);
+
+	rsl_tlv_parse(&tv, rllh->data, msgb_l2len(msg)-sizeof(*rllh));
+	if (!TLVP_PRESENT(&tv, RSL_IE_L3_INFO)) {
+		DEBUGP(DRSL, "UNIT_DATA_IND without L3 INFO ?!?\n");
+		return -EIO;
+	}
+	msg->l3h = (uint8_t *) TLVP_VAL(&tv, RSL_IE_L3_INFO);
+
+	if (rllh->chan_nr == RSL_CHAN_PCH_AGCH) {
+		rc = gsm48_rx_ccch(msg, ms);
+		ccch_enabled = 1;
+	} else if (rllh->chan_nr == RSL_CHAN_BCCH) {
+		rc = gsm48_rx_bcch(msg, ms);
+		if (ccch_enabled && (rach_count < 2)) {
+			tx_ph_rach_req(ms, rach_count, 27, 0);
+			rach_count++;
+		}
+	}
+
+	return rc;
+}
+
+static int rslms_rx_rll(struct msgb *msg, struct osmocom_ms *ms)
+{
+	struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
+	int rc = 0;
+
+	switch (rllh->c.msg_type) {
+	case RSL_MT_DATA_IND:
+		DEBUGP(DRSL, "RSLms DATA IND\n");
+		/* FIXME: implement this */
+		break;
+	case RSL_MT_UNIT_DATA_IND:
+		rc = rslms_rx_udata_ind(msg, ms);
+		break;
+	case RSL_MT_EST_IND:
+		DEBUGP(DRSL, "RSLms EST IND\n");
+		/* FIXME: implement this */
+		break;
+	case RSL_MT_EST_CONF:
+		DEBUGP(DRSL, "RSLms EST CONF\n");
+		/* FIXME: implement this */
+		break;
+	case RSL_MT_REL_CONF:
+		DEBUGP(DRSL, "RSLms REL CONF\n");
+		/* FIXME: implement this */
+		break;
+	case RSL_MT_ERROR_IND:
+		DEBUGP(DRSL, "RSLms ERR IND\n");
+		/* FIXME: implement this */
+		break;
+	default:
+		LOGP(DRSL, LOGL_NOTICE, "unknown RSLms message type "
+			"0x%02x\n", rllh->c.msg_type);
+		rc = -EINVAL;
+		break;
+	}
+	msgb_free(msg);
+	return rc;
+}
+
+/* input function that L2 calls when sending messages up to L3 */
+static int layer3_from_layer2(struct msgb *msg, struct osmocom_ms *ms)
+{
+	struct abis_rsl_common_hdr *rslh = msgb_l2(msg);
+	int rc = 0;
+
+	switch (rslh->msg_discr & 0xfe) {
+	case ABIS_RSL_MDISC_RLL:
+		rc = rslms_rx_rll(msg, ms);
+		break;
+	default:
+		/* FIXME: implement this */
+		LOGP(DRSL, LOGL_NOTICE, "unknown RSLms msg_discr 0x%02x\n",
+			rslh->msg_discr);
+		msgb_free(msg);
+		rc = -EINVAL;
+		break;
+	}
+
+	return rc;
+}
+
+int layer3_init(struct osmocom_ms *ms)
+{
+	return osmol2_register_handler(ms, &layer3_from_layer2);
+}