move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 155 insertions, 0 deletions

diff --git a/src/libmsc/gsm_04_80.c b/src/libmsc/gsm_04_80.c
new file mode 100644
index 000000000..479d6fbd2
--- /dev/null
+++ b/src/libmsc/gsm_04_80.c
@@ -0,0 +1,155 @@
+/* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface
+ * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
+
+/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2008, 2009, 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009 by Mike Haben <michael.haben@btinternet.com>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/gsm_04_08.h>
+#include <openbsc/gsm_04_80.h>
+#include <openbsc/bsc_api.h>
+
+#include <osmocom/gsm/gsm0480.h>
+#include <osmocom/gsm/gsm_utils.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/gsm/tlv.h>
+
+static inline unsigned char *msgb_wrap_with_TL(struct msgb *msgb, uint8_t tag)
+{
+	uint8_t *data = msgb_push(msgb, 2);
+
+	data[0] = tag;
+	data[1] = msgb->len - 2;
+	return data;
+}
+
+static inline unsigned char *msgb_push_TLV1(struct msgb *msgb, uint8_t tag,
+					    uint8_t value)
+{
+	uint8_t *data = msgb_push(msgb, 3);
+
+	data[0] = tag;
+	data[1] = 1;
+	data[2] = value;
+	return data;
+}
+
+
+/* Send response to a mobile-originated ProcessUnstructuredSS-Request */
+int gsm0480_send_ussd_response(struct gsm_subscriber_connection *conn,
+			       const struct msgb *in_msg, const char *response_text,
+			       const struct ss_request *req)
+{
+	struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 USSD RSP");
+	struct gsm48_hdr *gh;
+	uint8_t *ptr8;
+	int response_len;
+
+	/* First put the payload text into the message */
+	ptr8 = msgb_put(msg, 0);
+	gsm_7bit_encode_n_ussd(ptr8, msgb_tailroom(msg), response_text, &response_len);
+	msgb_put(msg, response_len);
+
+	/* Then wrap it as an Octet String */
+	msgb_wrap_with_TL(msg, ASN1_OCTET_STRING_TAG);
+
+	/* Pre-pend the DCS octet string */
+	msgb_push_TLV1(msg, ASN1_OCTET_STRING_TAG, 0x0F);
+
+	/* Then wrap these as a Sequence */
+	msgb_wrap_with_TL(msg, GSM_0480_SEQUENCE_TAG);
+
+	/* Pre-pend the operation code */
+	msgb_push_TLV1(msg, GSM0480_OPERATION_CODE,
+			GSM0480_OP_CODE_PROCESS_USS_REQ);
+
+	/* Wrap the operation code and IA5 string as a sequence */
+	msgb_wrap_with_TL(msg, GSM_0480_SEQUENCE_TAG);
+
+	/* Pre-pend the invoke ID */
+	msgb_push_TLV1(msg, GSM0480_COMPIDTAG_INVOKE_ID, req->invoke_id);
+
+	/* Wrap this up as a Return Result component */
+	msgb_wrap_with_TL(msg, GSM0480_CTYPE_RETURN_RESULT);
+
+	/* Wrap the component in a Facility message */
+	msgb_wrap_with_TL(msg, GSM0480_IE_FACILITY);
+
+	/* And finally pre-pend the L3 header */
+	gh = (struct gsm48_hdr *) msgb_push(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_NC_SS | req->transaction_id
+					| (1<<7);  /* TI direction = 1 */
+	gh->msg_type = GSM0480_MTYPE_RELEASE_COMPLETE;
+
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}
+
+int gsm0480_send_ussd_reject(struct gsm_subscriber_connection *conn,
+			     const struct msgb *in_msg,
+			     const struct ss_request *req)
+{
+	struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 USSD REJ");
+	struct gsm48_hdr *gh;
+
+	/* First insert the problem code */
+	msgb_push_TLV1(msg, GSM_0480_PROBLEM_CODE_TAG_GENERAL,
+			GSM_0480_GEN_PROB_CODE_UNRECOGNISED);
+
+	/* Before it insert the invoke ID */
+	msgb_push_TLV1(msg, GSM0480_COMPIDTAG_INVOKE_ID, req->invoke_id);
+
+	/* Wrap this up as a Reject component */
+	msgb_wrap_with_TL(msg, GSM0480_CTYPE_REJECT);
+
+	/* Wrap the component in a Facility message */
+	msgb_wrap_with_TL(msg, GSM0480_IE_FACILITY);
+
+	/* And finally pre-pend the L3 header */
+	gh = (struct gsm48_hdr *) msgb_push(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_NC_SS;
+	gh->proto_discr |= req->transaction_id | (1<<7);  /* TI direction = 1 */
+	gh->msg_type = GSM0480_MTYPE_RELEASE_COMPLETE;
+
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}
+
+int msc_send_ussd_notify(struct gsm_subscriber_connection *conn, int level, const char *text)
+{
+	struct msgb *msg = gsm0480_create_ussd_notify(level, text);
+	if (!msg)
+		return -1;
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}
+
+int msc_send_ussd_release_complete(struct gsm_subscriber_connection *conn)
+{
+	struct msgb *msg = gsm0480_create_ussd_release_complete();
+	if (!msg)
+		return -1;
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}