1 files changed, 0 insertions, 381 deletions
diff --git a/src/osmo-bsc/osmo_bsc_filter.c b/src/osmo-bsc/osmo_bsc_filter.c
deleted file mode 100644
index 2c84b169f..000000000
--- a/src/osmo-bsc/osmo_bsc_filter.c
+++ /dev/null
@@ -1,381 +0,0 @@
-/* (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2009-2011 by On-Waves
- * 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 <openbsc/osmo_bsc.h>
-#include <openbsc/bsc_msc_data.h>
-#include <openbsc/gsm_04_80.h>
-#include <openbsc/gsm_subscriber.h>
-#include <openbsc/bsc_subscriber.h>
-#include <openbsc/debug.h>
-#include <openbsc/paging.h>
-
-#include <stdlib.h>
-
-static void handle_lu_request(struct gsm_subscriber_connection *conn,
-			      struct msgb *msg)
-{
-	struct gsm48_hdr *gh;
-	struct gsm48_loc_upd_req *lu;
-	struct gsm48_loc_area_id lai;
-	struct gsm_network *net;
-
-	if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*lu)) {
-		LOGP(DMSC, LOGL_ERROR, "LU too small to look at: %u\n", msgb_l3len(msg));
-		return;
-	}
-
-	net = conn->bts->network;
-
-	gh = msgb_l3(msg);
-	lu = (struct gsm48_loc_upd_req *) gh->data;
-
-	gsm48_generate_lai(&lai, net->country_code, net->network_code,
-			   conn->bts->location_area_code);
-
-	if (memcmp(&lai, &lu->lai, sizeof(lai)) != 0) {
-		LOGP(DMSC, LOGL_DEBUG, "Marking con for welcome USSD.\n");
-		conn->sccp_con->new_subscriber = 1;
-	}
-}
-
-/* extract a subscriber from the paging response */
-static struct bsc_subscr *extract_sub(struct gsm_subscriber_connection *conn,
-				   struct msgb *msg)
-{
-	uint8_t mi_type;
-	char mi_string[GSM48_MI_SIZE];
-	struct gsm48_hdr *gh;
-	struct gsm48_pag_resp *resp;
-	struct bsc_subscr *subscr;
-
-	if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*resp)) {
-		LOGP(DMSC, LOGL_ERROR, "PagingResponse too small: %u\n", msgb_l3len(msg));
-		return NULL;
-	}
-
-	gh = msgb_l3(msg);
-	resp = (struct gsm48_pag_resp *) &gh->data[0];
-
-	gsm48_paging_extract_mi(resp, msgb_l3len(msg) - sizeof(*gh),
-				mi_string, &mi_type);
-	DEBUGP(DRR, "PAGING RESPONSE: MI(%s)=%s\n",
-		gsm48_mi_type_name(mi_type), mi_string);
-
-	switch (mi_type) {
-	case GSM_MI_TYPE_TMSI:
-		subscr = bsc_subscr_find_by_tmsi(conn->network->bsc_subscribers,
-					      tmsi_from_string(mi_string));
-		break;
-	case GSM_MI_TYPE_IMSI:
-		subscr = bsc_subscr_find_by_imsi(conn->network->bsc_subscribers,
-					      mi_string);
-		break;
-	default:
-		subscr = NULL;
-		break;
-	}
-
-	return subscr;
-}
-
-/* we will need to stop the paging request */
-static int handle_page_resp(struct gsm_subscriber_connection *conn, struct msgb *msg)
-{
-	struct bsc_subscr *subscr = extract_sub(conn, msg);
-
-	if (!subscr) {
-		LOGP(DMSC, LOGL_ERROR, "Non active subscriber got paged.\n");
-		return -1;
-	}
-
-	paging_request_stop(&conn->network->bts_list, conn->bts, subscr, conn,
-			    msg);
-	bsc_subscr_put(subscr);
-	return 0;
-}
-
-static int is_cm_service_for_emerg(struct msgb *msg)
-{
-	struct gsm48_service_request *cm;
-	struct gsm48_hdr *gh = msgb_l3(msg);
-
-	if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*cm)) {
-		LOGP(DMSC, LOGL_ERROR, "CM ServiceRequest does not fit.\n");
-		return 0;
-	}
-
-	cm = (struct gsm48_service_request *) &gh->data[0];
-	return cm->cm_service_type == GSM48_CMSERV_EMERGENCY;
-}
-
-struct bsc_msc_data *bsc_find_msc(struct gsm_subscriber_connection *conn,
-				   struct msgb *msg)
-{
-	struct gsm48_hdr *gh;
-	int8_t pdisc;
-	uint8_t mtype;
-	struct osmo_bsc_data *bsc;
-	struct bsc_msc_data *msc, *pag_msc;
-	struct bsc_subscr *subscr;
-	int is_emerg = 0;
-
-	bsc = conn->bts->network->bsc_data;
-
-	if (msgb_l3len(msg) < sizeof(*gh)) {
-		LOGP(DMSC, LOGL_ERROR, "There is no GSM48 header here.\n");
-		return NULL;
-	}
-
-	gh = msgb_l3(msg);
-	pdisc = gsm48_hdr_pdisc(gh);
-	mtype = gsm48_hdr_msg_type(gh);
-
-	/*
-	 * We are asked to select a MSC here but they are not equal. We
-	 * want to respond to a paging request on the MSC where we got the
-	 * request from. This is where we need to decide where this connection
-	 * will go.
-	 */
-	if (pdisc == GSM48_PDISC_RR && mtype == GSM48_MT_RR_PAG_RESP)
-		goto paging;
-	else if (pdisc == GSM48_PDISC_MM && mtype == GSM48_MT_MM_CM_SERV_REQ) {
-		is_emerg = is_cm_service_for_emerg(msg);
-		goto round_robin;
-	} else
-		goto round_robin;
-
-round_robin:
-	llist_for_each_entry(msc, &bsc->mscs, entry) {
-		if (!msc->msc_con->is_authenticated)
-			continue;
-		if (!is_emerg && msc->type != MSC_CON_TYPE_NORMAL)
-			continue;
-		if (is_emerg && !msc->allow_emerg)
-			continue;
-
-		/* force round robin by moving it to the end */
-		llist_move_tail(&msc->entry, &bsc->mscs);
-		return msc;
-	}
-
-	return NULL;
-
-paging:
-	subscr = extract_sub(conn, msg);
-
-	if (!subscr) {
-		LOGP(DMSC, LOGL_ERROR, "Got paged but no subscriber found.\n");
-		return NULL;
-	}
-
-	pag_msc = paging_get_data(conn->bts, subscr);
-	bsc_subscr_put(subscr);
-
-	llist_for_each_entry(msc, &bsc->mscs, entry) {
-		if (msc != pag_msc)
-			continue;
-
-		/*
-		 * We don't check if the MSC is connected. In case it
-		 * is not the connection will be dropped.
-		 */
-
-		/* force round robin by moving it to the end */
-		llist_move_tail(&msc->entry, &bsc->mscs);
-		return msc;
-	}
-
-	LOGP(DMSC, LOGL_ERROR, "Got paged but no request found.\n");
-	return NULL;
-}
-
-
-/**
- * This is used to scan a message for extra functionality of the BSC. This
- * includes scanning for location updating requests/acceptd and then send
- * a welcome USSD message to the subscriber.
- */
-int bsc_scan_bts_msg(struct gsm_subscriber_connection *conn, struct msgb *msg)
-{
-	struct gsm48_hdr *gh = msgb_l3(msg);
-	uint8_t pdisc = gsm48_hdr_pdisc(gh);
-	uint8_t mtype = gsm48_hdr_msg_type(gh);
-
-	if (pdisc == GSM48_PDISC_MM) {
-		if (mtype == GSM48_MT_MM_LOC_UPD_REQUEST)
-			handle_lu_request(conn, msg);
-	} else if (pdisc == GSM48_PDISC_RR) {
-		if (mtype == GSM48_MT_RR_PAG_RESP)
-			handle_page_resp(conn, msg);
-	}
-
-	return 0;
-}
-
-static int send_welcome_ussd(struct gsm_subscriber_connection *conn)
-{
-	struct osmo_bsc_sccp_con *bsc_con;
-
-	bsc_con = conn->sccp_con;
-	if (!bsc_con) {
-		LOGP(DMSC, LOGL_DEBUG, "No SCCP connection associated.\n");
-		return 0;
-	}
-
-	if (!bsc_con->msc->ussd_welcome_txt) {
-		LOGP(DMSC, LOGL_DEBUG, "No USSD Welcome text defined.\n");
-		return 0;
-	}
-
-	return BSS_SEND_USSD;
-}
-
-int bsc_send_welcome_ussd(struct gsm_subscriber_connection *conn)
-{
-	bsc_send_ussd_notify(conn, 1, conn->sccp_con->msc->ussd_welcome_txt);
-	bsc_send_ussd_release_complete(conn);
-
-	return 0;
-}
-
-static int bsc_patch_mm_info(struct gsm_subscriber_connection *conn,
-		uint8_t *data, unsigned int length)
-{
-	struct tlv_parsed tp;
-	int parse_res;
-	struct gsm_bts *bts = conn->bts;
-	int tzunits;
-	uint8_t tzbsd = 0;
-	uint8_t dst = 0;
-
-	parse_res = tlv_parse(&tp, &gsm48_mm_att_tlvdef, data, length, 0, 0);
-	if (parse_res <= 0 && parse_res != -3)
-		/* FIXME: -3 means unknown IE error, so this accepts messages
-		 * with unknown IEs. But parsing has aborted with the unknown
-		 * IE and the message is broken or parsed incompletely. */
-		return 0;
-
-	/* Is TZ patching enabled? */
-	struct gsm_tz *tz = &bts->network->tz;
-	if (!tz->override)
-		return 0;
-
-	/* Convert tz.hr and tz.mn to units */
-	if (tz->hr < 0) {
-		tzunits = -tz->hr*4;
-		tzbsd |= 0x08;
-	} else
-		tzunits = tz->hr*4;
-
-	tzunits = tzunits + (tz->mn/15);
-
-	tzbsd |= (tzunits % 10)*0x10 + (tzunits / 10);
-
-	/* Convert DST value */
-	if (tz->dst >= 0 && tz->dst <= 2)
-		dst = tz->dst;
-
-	if (TLVP_PRESENT(&tp, GSM48_IE_UTC)) {
-		LOGP(DMSC, LOGL_DEBUG,
-			"Changing 'Local time zone' from 0x%02x to 0x%02x.\n",
-			TLVP_VAL(&tp, GSM48_IE_UTC)[6], tzbsd);
-		((uint8_t *)(TLVP_VAL(&tp, GSM48_IE_UTC)))[0] = tzbsd;
-	}
-	if (TLVP_PRESENT(&tp, GSM48_IE_NET_TIME_TZ)) {
-		LOGP(DMSC, LOGL_DEBUG,
-			"Changing 'Universal time and local time zone' TZ from "
-			"0x%02x to 0x%02x.\n",
-			TLVP_VAL(&tp, GSM48_IE_NET_TIME_TZ)[6], tzbsd);
-		((uint8_t *)(TLVP_VAL(&tp, GSM48_IE_NET_TIME_TZ)))[6] = tzbsd;
-	}
-#ifdef GSM48_IE_NET_DST
-	if (TLVP_PRESENT(&tp, GSM48_IE_NET_DST)) {
-		LOGP(DMSC, LOGL_DEBUG,
-			"Changing 'Network daylight saving time' from "
-			"0x%02x to 0x%02x.\n",
-			TLVP_VAL(&tp, GSM48_IE_NET_DST)[0], dst);
-		((uint8_t *)(TLVP_VAL(&tp, GSM48_IE_NET_DST)))[0] = dst;
-	}
-#endif
-
-	return 0;
-}
-
-static int has_core_identity(struct bsc_msc_data *msc)
-{
-	if (msc->core_mnc != -1)
-		return 1;
-	if (msc->core_mcc != -1)
-		return 1;
-	if (msc->core_lac != -1)
-		return 1;
-	if (msc->core_ci != -1)
-		return 1;
-	return 0;
-}
-
-/**
- * Messages coming back from the MSC.
- */
-int bsc_scan_msc_msg(struct gsm_subscriber_connection *conn, struct msgb *msg)
-{
-	struct bsc_msc_data *msc;
-	struct gsm_network *net;
-	struct gsm48_loc_area_id *lai;
-	struct gsm48_hdr *gh;
-	uint8_t pdisc;
-	uint8_t mtype;
-	int length = msgb_l3len(msg);
-
-	if (length < sizeof(*gh)) {
-		LOGP(DMSC, LOGL_ERROR, "GSM48 header does not fit.\n");
-		return -1;
-	}
-
-	gh = (struct gsm48_hdr *) msgb_l3(msg);
-	length -= (const char *)&gh->data[0] - (const char *)gh;
-
-	pdisc = gsm48_hdr_pdisc(gh);
-	if (pdisc != GSM48_PDISC_MM)
-		return 0;
-
-	mtype = gsm48_hdr_msg_type(gh);
-	net = conn->bts->network;
-	msc = conn->sccp_con->msc;
-
-	if (mtype == GSM48_MT_MM_LOC_UPD_ACCEPT) {
-		if (has_core_identity(msc)) {
-			if (msgb_l3len(msg) >= sizeof(*gh) + sizeof(*lai)) {
-				/* overwrite LAI in the message */
-				lai = (struct gsm48_loc_area_id *) &gh->data[0];
-				gsm48_generate_lai(lai, net->country_code,
-						   net->network_code,
-						   conn->bts->location_area_code);
-			}
-		}
-
-		if (conn->sccp_con->new_subscriber)
-			return send_welcome_ussd(conn);
-		return 0;
-	} else if (mtype == GSM48_MT_MM_INFO) {
-		bsc_patch_mm_info(conn, &gh->data[0], length);
-	}
-
-	return 0;
-}