aboutsummaryrefslogtreecommitdiffstats
path: root/src/libmsc/osmo_msc.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libmsc/osmo_msc.c')
-rw-r--r--src/libmsc/osmo_msc.c387
1 files changed, 0 insertions, 387 deletions
diff --git a/src/libmsc/osmo_msc.c b/src/libmsc/osmo_msc.c
deleted file mode 100644
index 4d24f22a6..000000000
--- a/src/libmsc/osmo_msc.c
+++ /dev/null
@@ -1,387 +0,0 @@
-/* main MSC management code... */
-
-/*
- * (C) 2010,2013 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2010 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_msc.h>
-#include <openbsc/bsc_api.h>
-#include <openbsc/debug.h>
-#include <openbsc/transaction.h>
-#include <openbsc/db.h>
-#include <openbsc/vlr.h>
-#include <openbsc/osmo_msc.h>
-#include <openbsc/a_iface.h>
-
-#include <openbsc/gsm_04_11.h>
-
-#include "../../bscconfig.h"
-#ifdef BUILD_IU
-#include <osmocom/ranap/iu_client.h>
-#else
-#include <openbsc/iu_dummy.h>
-#endif
-
-/* Receive a SAPI-N-REJECT from BSC */
-void msc_sapi_n_reject(struct gsm_subscriber_connection *conn, int dlci)
-{
- int sapi = dlci & 0x7;
-
- if (sapi == UM_SAPI_SMS)
- gsm411_sapi_n_reject(conn);
-}
-
-static void subscr_conn_bump(struct gsm_subscriber_connection *conn)
-{
- if (!conn)
- return;
- if (!conn->conn_fsm)
- return;
- if (!(conn->conn_fsm->state == SUBSCR_CONN_S_ACCEPTED
- || conn->conn_fsm->state == SUBSCR_CONN_S_COMMUNICATING)) {
- DEBUGP(DMM, "%s: bump: conn still being established (%s)\n",
- vlr_subscr_name(conn->vsub),
- osmo_fsm_inst_state_name(conn->conn_fsm));
- return;
- }
- osmo_fsm_inst_dispatch(conn->conn_fsm, SUBSCR_CONN_E_BUMP, NULL);
-}
-
-/* receive a Level 3 Complete message and return MSC_CONN_ACCEPT or
- * MSC_CONN_REJECT */
-int msc_compl_l3(struct gsm_subscriber_connection *conn,
- struct msgb *msg, uint16_t chosen_channel)
-{
- msc_subscr_conn_get(conn);
- gsm0408_dispatch(conn, msg);
-
- /* Bump whether the conn wants to be closed */
- subscr_conn_bump(conn);
-
- /* If this should be kept, the conn->conn_fsm has placed a use_count */
- msc_subscr_conn_put(conn);
-
- /* Always return acceptance, because even if the conn was not accepted,
- * we assumed ownership of it and the caller shall not interfere with
- * that. We may even already have discarded the conn. */
- return MSC_CONN_ACCEPT;
-
-#if 0
- /*
- * If this is a silent call we want the channel to remain open as long as
- * possible and this is why we accept this connection regardless of any
- * pending transaction or ongoing operation.
- */
- if (conn->silent_call)
- return MSC_CONN_ACCEPT;
- if (conn->loc_operation || conn->sec_operation || conn->anch_operation)
- return MSC_CONN_ACCEPT;
- if (trans_has_conn(conn))
- return MSC_CONN_ACCEPT;
-
- LOGP(DRR, LOGL_INFO, "MSC Complete L3: Rejecting connection.\n");
- return MSC_CONN_REJECT;
-#endif
-}
-
-/* Receive a DTAP message from BSC */
-void msc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id, struct msgb *msg)
-{
- msc_subscr_conn_get(conn);
- gsm0408_dispatch(conn, msg);
-
- /* Bump whether the conn wants to be closed */
- subscr_conn_bump(conn);
- msc_subscr_conn_put(conn);
-}
-
-/* Receive an ASSIGNMENT COMPLETE from BSC */
-void msc_assign_compl(struct gsm_subscriber_connection *conn,
- uint8_t rr_cause, uint8_t chosen_channel,
- uint8_t encr_alg_id, uint8_t speec)
-{
- LOGP(DRR, LOGL_DEBUG, "MSC assign complete (do nothing).\n");
-}
-
-/* Receive an ASSIGNMENT FAILURE from BSC */
-void msc_assign_fail(struct gsm_subscriber_connection *conn,
- uint8_t cause, uint8_t *rr_cause)
-{
- LOGP(DRR, LOGL_DEBUG, "MSC assign failure (do nothing).\n");
-}
-
-/* Receive a CLASSMARK CHANGE from BSC */
-void msc_classmark_chg(struct gsm_subscriber_connection *conn,
- const uint8_t *cm2, uint8_t cm2_len,
- const uint8_t *cm3, uint8_t cm3_len)
-{
- if (cm2 && cm2_len) {
- if (cm2_len > sizeof(conn->classmark.classmark2)) {
- LOGP(DRR, LOGL_NOTICE, "%s: classmark2 is %u bytes, truncating at %zu bytes\n",
- vlr_subscr_name(conn->vsub), cm2_len, sizeof(conn->classmark.classmark2));
- cm2_len = sizeof(conn->classmark.classmark2);
- }
- conn->classmark.classmark2_len = cm2_len;
- memcpy(conn->classmark.classmark2, cm2, cm2_len);
- }
- if (cm3 && cm3_len) {
- if (cm3_len > sizeof(conn->classmark.classmark3)) {
- LOGP(DRR, LOGL_NOTICE, "%s: classmark3 is %u bytes, truncating at %zu bytes\n",
- vlr_subscr_name(conn->vsub), cm3_len, sizeof(conn->classmark.classmark3));
- cm3_len = sizeof(conn->classmark.classmark3);
- }
- conn->classmark.classmark3_len = cm3_len;
- memcpy(conn->classmark.classmark3, cm3, cm3_len);
- }
-}
-
-/* Receive a CIPHERING MODE COMPLETE from BSC */
-void msc_cipher_mode_compl(struct gsm_subscriber_connection *conn,
- struct msgb *msg, uint8_t alg_id)
-{
- struct gsm48_hdr *gh = msgb_l3(msg);
- unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
- struct tlv_parsed tp;
- uint8_t mi_type;
- char imeisv[GSM48_MI_SIZE] = "";
- struct vlr_ciph_result ciph_res = { .cause = VLR_CIPH_REJECT };
-
- if (!gh) {
- LOGP(DRR, LOGL_ERROR, "invalid: msgb without l3 header\n");
- return;
- }
-
- if (!conn) {
- LOGP(DRR, LOGL_ERROR,
- "invalid: rx Ciphering Mode Complete on NULL conn\n");
- return;
- }
- if (!conn->vsub) {
- LOGP(DRR, LOGL_ERROR,
- "invalid: rx Ciphering Mode Complete for NULL subscr\n");
- return;
- }
-
- DEBUGP(DRR, "%s: CIPHERING MODE COMPLETE\n",
- vlr_subscr_name(conn->vsub));
-
- tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
-
- /* bearer capability */
- if (TLVP_PRESENT(&tp, GSM48_IE_MOBILE_ID)) {
- mi_type = TLVP_VAL(&tp, GSM48_IE_MOBILE_ID)[0] & GSM_MI_TYPE_MASK;
- if (mi_type == GSM_MI_TYPE_IMEISV
- && TLVP_LEN(&tp, GSM48_IE_MOBILE_ID) > 0) {
- gsm48_mi_to_string(imeisv, sizeof(imeisv),
- TLVP_VAL(&tp, GSM48_IE_MOBILE_ID),
- TLVP_LEN(&tp, GSM48_IE_MOBILE_ID));
- ciph_res.imeisv = imeisv;
- }
- }
-
- ciph_res.cause = VLR_CIPH_COMPL;
- vlr_subscr_rx_ciph_res(conn->vsub, &ciph_res);
-}
-
-struct gsm_subscriber_connection *msc_subscr_con_allocate(struct gsm_network *network)
-{
- struct gsm_subscriber_connection *conn;
-
- conn = talloc_zero(network, struct gsm_subscriber_connection);
- if (!conn)
- return NULL;
-
- conn->network = network;
- llist_add_tail(&conn->entry, &network->subscr_conns);
- return conn;
-}
-
-void msc_subscr_cleanup(struct vlr_subscr *vsub)
-{
- if (!vsub)
- return;
- vsub->lu_fsm = NULL;
-}
-
-void msc_subscr_con_cleanup(struct gsm_subscriber_connection *conn)
-{
- if (!conn)
- return;
-
- if (conn->vsub) {
- DEBUGP(DRLL, "subscr %s: Freeing subscriber connection\n",
- vlr_subscr_name(conn->vsub));
- msc_subscr_cleanup(conn->vsub);
- vlr_subscr_put(conn->vsub);
- conn->vsub = NULL;
- } else
- DEBUGP(DRLL, "Freeing subscriber connection"
- " with NULL subscriber\n");
-
- if (!conn->conn_fsm)
- return;
-
- osmo_fsm_inst_term(conn->conn_fsm,
- (conn->conn_fsm->state == SUBSCR_CONN_S_RELEASED)
- ? OSMO_FSM_TERM_REGULAR
- : OSMO_FSM_TERM_ERROR,
- NULL);
-}
-
-void msc_subscr_con_free(struct gsm_subscriber_connection *conn)
-{
- if (!conn)
- return;
-
- msc_subscr_con_cleanup(conn);
-
- llist_del(&conn->entry);
- talloc_free(conn);
-}
-
-/* Receive a CLEAR REQUEST from BSC */
-int msc_clear_request(struct gsm_subscriber_connection *conn, uint32_t cause)
-{
- msc_subscr_conn_close(conn, cause);
- return 1;
-}
-
-/* MSC-level operations to be called by libbsc in NITB */
-static struct bsc_api msc_handler = {
- .sapi_n_reject = msc_sapi_n_reject,
- .compl_l3 = msc_compl_l3,
- .dtap = msc_dtap,
- .clear_request = msc_clear_request,
- .assign_compl = msc_assign_compl,
- .assign_fail = msc_assign_fail,
- .classmark_chg = msc_classmark_chg,
- .cipher_mode_compl = msc_cipher_mode_compl,
- .conn_cleanup = msc_subscr_con_cleanup,
-};
-
-struct bsc_api *msc_bsc_api() {
- return &msc_handler;
-}
-
-static void msc_subscr_conn_release_all(struct gsm_subscriber_connection *conn, uint32_t cause)
-{
- if (conn->in_release)
- return;
- conn->in_release = true;
-
- /* If we're closing in a middle of a trans, we need to clean up */
- trans_conn_closed(conn);
-
- switch (conn->via_ran) {
- case RAN_UTRAN_IU:
- ranap_iu_tx_release(conn->iu.ue_ctx, NULL);
- /* FIXME: keep the conn until the Iu Release Outcome is
- * received from the UE, or a timeout expires. For now, the log
- * says "unknown UE" for each release outcome. */
- break;
- case RAN_GERAN_A:
- a_iface_tx_clear_cmd(conn);
- break;
- default:
- LOGP(DMM, LOGL_ERROR, "%s: Unknown RAN type, cannot tx release/clear\n",
- vlr_subscr_name(conn->vsub));
- break;
- }
-}
-
-/* If the conn->conn_fsm is still present, dispatch SUBSCR_CONN_E_CN_CLOSE
- * event to gracefully terminate the connection. If the conn_fsm is already
- * cleared, call msc_subscr_conn_release_all() to take release actions.
- * \param cause a GSM_CAUSE_* constant, e.g. GSM_CAUSE_AUTH_FAILED.
- */
-void msc_subscr_conn_close(struct gsm_subscriber_connection *conn,
- uint32_t cause)
-{
- if (!conn)
- return;
- if (conn->in_release) {
- DEBUGP(DMM, "msc_subscr_conn_close(vsub=%s, cause=%u):"
- " already dispatching release, ignore.\n",
- vlr_subscr_name(conn->vsub), cause);
- return;
- }
- if (!conn->conn_fsm) {
- DEBUGP(DMM, "msc_subscr_conn_close(vsub=%s, cause=%u): no conn fsm,"
- " releasing directly without release event.\n",
- vlr_subscr_name(conn->vsub), cause);
- /* In case of an IMSI Detach, we don't have conn_fsm. Release
- * anyway to ensure a timely Iu Release / BSSMAP Clear. */
- msc_subscr_conn_release_all(conn, cause);
- return;
- }
- if (conn->conn_fsm->state == SUBSCR_CONN_S_RELEASED) {
- DEBUGP(DMM, "msc_subscr_conn_close(vsub=%s, cause=%u):"
- " conn fsm already releasing, ignore.\n",
- vlr_subscr_name(conn->vsub), cause);
- return;
- }
- osmo_fsm_inst_dispatch(conn->conn_fsm, SUBSCR_CONN_E_CN_CLOSE, &cause);
-}
-
-/* increment the ref-count. Needs to be called by every user */
-struct gsm_subscriber_connection *
-_msc_subscr_conn_get(struct gsm_subscriber_connection *conn,
- const char *file, int line)
-{
- OSMO_ASSERT(conn);
-
- if (conn->in_release)
- return NULL;
-
- conn->use_count++;
- LOGPSRC(DREF, LOGL_DEBUG, file, line,
- "%s: MSC conn use + 1 == %u\n",
- vlr_subscr_name(conn->vsub), conn->use_count);
-
- return conn;
-}
-
-/* decrement the ref-count. Once it reaches zero, we release */
-void _msc_subscr_conn_put(struct gsm_subscriber_connection *conn,
- const char *file, int line)
-{
- OSMO_ASSERT(conn);
-
- if (conn->use_count == 0) {
- LOGPSRC(DREF, LOGL_ERROR, file, line,
- "%s: MSC conn use - 1 failed: is already 0\n",
- vlr_subscr_name(conn->vsub));
- return;
- }
-
- conn->use_count--;
- LOGPSRC(DREF, LOGL_DEBUG, file, line,
- "%s: MSC conn use - 1 == %u\n",
- vlr_subscr_name(conn->vsub), conn->use_count);
-
- if (conn->use_count == 0)
- msc_subscr_con_free(conn);
-}
-
-void msc_stop_paging(struct vlr_subscr *vsub)
-{
- DEBUGP(DPAG, "Paging can stop for %s\n", vlr_subscr_name(vsub));
- /* tell BSCs and RNCs to stop paging? How? */
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-16 05:32:16 +0000