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-rw-r--r--src/libmsc/a_iface.c578
1 files changed, 0 insertions, 578 deletions
diff --git a/src/libmsc/a_iface.c b/src/libmsc/a_iface.c
deleted file mode 100644
index 25d3970f0..000000000
--- a/src/libmsc/a_iface.c
+++ /dev/null
@@ -1,578 +0,0 @@
-/* (C) 2017 by sysmocom s.f.m.c. GmbH
- * All Rights Reserved
- *
- * Author: Philipp Maier
- *
- * 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 <osmocom/core/utils.h>
-#include <osmocom/core/msgb.h>
-#include <osmocom/core/logging.h>
-#include <osmocom/sigtran/sccp_helpers.h>
-#include <osmocom/sigtran/sccp_sap.h>
-#include <osmocom/sigtran/osmo_ss7.h>
-#include <osmocom/sigtran/protocol/m3ua.h>
-#include <osmocom/gsm/gsm0808.h>
-#include <osmocom/gsm/protocol/gsm_08_08.h>
-#include <osmocom/gsm/protocol/gsm_04_08.h>
-#include <osmocom/gsm/gsm0808_utils.h>
-#include <openbsc/debug.h>
-#include <openbsc/msc_ifaces.h>
-#include <openbsc/a_iface.h>
-#include <openbsc/a_iface_bssap.h>
-#include <openbsc/transaction.h>
-#include <osmocom/legacy_mgcp/mgcpgw_client.h>
-#include <osmocom/core/byteswap.h>
-#include <osmocom/sccp/sccp_types.h>
-#include <openbsc/a_reset.h>
-#include <openbsc/osmo_msc.h>
-
-/* A pointer to the GSM network we work with. By the current paradigm,
- * there can only be one gsm_network per MSC. The pointer is set once
- * when calling a_init() */
-static struct gsm_network *gsm_network = NULL;
-
-/* A struct to track currently active connections. We need that information
- * to handle failure sitautions. In case of a problem, we must know which
- * connections are currently open and which BSC is responsible. We also need
- * the data to perform our connection checks (a_reset). All other logic will
- * look at the connection ids and addresses that are supplied by the
- * primitives */
-struct bsc_conn {
- struct llist_head list;
- uint32_t conn_id; /* Connection identifier */
-};
-
-/* Internal list with connections we currently maintain. This
- * list is of type struct bsc_conn (see above) */
-static LLIST_HEAD(active_connections);
-
-/* Record info of a new active connection in the active connection list */
-static void record_bsc_con(const void *ctx, uint32_t conn_id)
-{
- struct bsc_conn *conn;
-
- conn = talloc_zero(ctx, struct bsc_conn);
- OSMO_ASSERT(conn);
-
- conn->conn_id = conn_id;
-
- llist_add_tail(&conn->list, &active_connections);
-}
-
-/* Delete info of a closed connection from the active connection list */
-void a_delete_bsc_con(uint32_t conn_id)
-{
- struct bsc_conn *conn;
- struct bsc_conn *conn_temp;
-
- LOGP(DMSC, LOGL_DEBUG,
- "Removing connection from active sccp-connection list (conn_id=%i)\n",
- conn_id);
-
- llist_for_each_entry_safe(conn, conn_temp, &active_connections, list) {
- if (conn->conn_id == conn_id) {
- llist_del(&conn->list);
- talloc_free(conn);
- }
- }
-}
-
-/* Check if a specified connection id has an active SCCP connection */
-static bool check_connection_active(uint32_t conn_id)
-{
- struct bsc_conn *conn;
-
- /* Find the address for the current connection id */
- llist_for_each_entry(conn, &active_connections, list) {
- if (conn->conn_id == conn_id) {
- return true;
- }
- }
-
- return false;
-}
-
-/* Get the reset context for a specifiec calling (BSC) address */
-static struct a_reset_ctx *get_reset_ctx_by_sccp_addr(const struct osmo_sccp_addr *addr)
-{
- struct bsc_context *bsc_ctx;
-
- if (!addr)
- return NULL;
-
- llist_for_each_entry(bsc_ctx, &gsm_network->a.bscs, list) {
- if (memcmp(&bsc_ctx->bsc_addr, addr, sizeof(*addr)) == 0)
- return bsc_ctx->reset;
- }
-
- LOGP(DMSC, LOGL_ERROR, "The calling BSC (%s) is unknown to this MSC ...\n",
- osmo_sccp_addr_dump(addr));
- return NULL;
-}
-
-/* Send DTAP message via A-interface */
-int a_iface_tx_dtap(struct msgb *msg)
-{
- struct gsm_subscriber_connection *conn;
- struct msgb *msg_resp;
-
- /* FIXME: Set this to some meaninful value! */
- uint8_t link_id = 0x00;
- OSMO_ASSERT(msg);
- conn = (struct gsm_subscriber_connection *)msg->dst;
- OSMO_ASSERT(conn);
- OSMO_ASSERT(conn->a.scu);
-
- LOGP(DMSC, LOGL_DEBUG, "Passing DTAP message from MSC to BSC (conn_id=%i)\n", conn->a.conn_id);
-
- msg->l3h = msg->data;
- msg_resp = gsm0808_create_dtap(msg, link_id);
- if (!msg_resp) {
- LOGP(DMSC, LOGL_ERROR, "Unable to generate BSSMAP DTAP message!\n");
- return -EINVAL;
- } else
- LOGP(DMSC, LOGL_DEBUG, "Massage will be sent as BSSMAP DTAP message!\n");
-
- LOGP(DMSC, LOGL_DEBUG, "N-DATA.req(%u, %s)\n", conn->a.conn_id, osmo_hexdump(msg_resp->data, msg_resp->len));
- return osmo_sccp_tx_data_msg(conn->a.scu, conn->a.conn_id, msg_resp);
-}
-
-/* Send Cipher mode command via A-interface */
-int a_iface_tx_cipher_mode(const struct gsm_subscriber_connection *conn,
- int cipher, const const uint8_t *key, int len, int include_imeisv)
-{
- /* TODO generalize for A- and Iu interfaces, don't name after 08.08 */
- struct msgb *msg_resp;
- struct gsm0808_encrypt_info ei;
-
- OSMO_ASSERT(conn);
-
- LOGP(DMSC, LOGL_DEBUG, "Passing Cipher mode command message from MSC to BSC (conn_id=%i)\n", conn->a.conn_id);
- uint8_t crm = 0x01;
- uint8_t *crm_ptr = NULL;
-
- /* Setup encryption information */
- if (len > ENCRY_INFO_KEY_MAXLEN || !key) {
- LOGP(DMSC, LOGL_ERROR,
- "Cipher mode command message could not be generated due to invalid key! (conn_id=%i)\n",
- conn->a.conn_id);
- return -EINVAL;
- } else {
- memcpy(&ei.key, key, len);
- ei.key_len = len;
- }
-
- if (include_imeisv)
- crm_ptr = &crm;
-
- ei.perm_algo[0] = (uint8_t) (1 << cipher);
- ei.perm_algo_len = 1;
-
- msg_resp = gsm0808_create_cipher(&ei, crm_ptr);
- LOGP(DMSC, LOGL_DEBUG, "N-DATA.req(%u, %s)\n", conn->a.conn_id, osmo_hexdump(msg_resp->data, msg_resp->len));
-
- return osmo_sccp_tx_data_msg(conn->a.scu, conn->a.conn_id, msg_resp);
-}
-
-/* Page a subscriber via A-interface */
-int a_iface_tx_paging(const char *imsi, uint32_t tmsi, uint16_t lac)
-{
- struct bsc_context *bsc_ctx;
- struct gsm0808_cell_id_list cil;
- struct msgb *msg;
- int page_count = 0;
-
- OSMO_ASSERT(imsi);
-
- cil.id_discr = CELL_IDENT_LAC;
- cil.id_list_lac[0] = lac;
- cil.id_list_len = 1;
-
- /* Deliver paging request to all known BSCs */
- llist_for_each_entry(bsc_ctx, &gsm_network->a.bscs, list) {
- if (a_reset_conn_ready(bsc_ctx->reset)) {
- LOGP(DMSC, LOGL_DEBUG,
- "Passing paging message from MSC %s to BSC %s (imsi=%s, tmsi=0x%08x, lac=%u)\n",
- osmo_sccp_addr_dump(&bsc_ctx->msc_addr),
- osmo_sccp_addr_dump(&bsc_ctx->bsc_addr), imsi, tmsi, lac);
- msg = gsm0808_create_paging(imsi, &tmsi, &cil, NULL);
- osmo_sccp_tx_unitdata_msg(bsc_ctx->sccp_user,
- &bsc_ctx->msc_addr, &bsc_ctx->bsc_addr, msg);
- page_count++;
- } else {
- LOGP(DMSC, LOGL_DEBUG,
- "Connection down, dropping paging from MSC %s to BSC %s (imsi=%s, tmsi=0x%08x, lac=%u)\n",
- osmo_sccp_addr_dump(&bsc_ctx->msc_addr),
- osmo_sccp_addr_dump(&bsc_ctx->bsc_addr), imsi, tmsi, lac);
- }
- }
-
- if (page_count <= 0)
- LOGP(DMSC, LOGL_ERROR, "Could not deliver paging because none of the associated BSCs is available!\n");
-
- return page_count;
-}
-
-/* Convert speech version field */
-static uint8_t convert_Abis_sv_to_A_sv(int speech_ver)
-{
- /* The speech versions that are transmitted in the Bearer capability
- * information element, that is transmitted on the Abis interfece
- * use a different encoding than the permitted speech version
- * identifier, that is signalled in the channel type element on the A
- * interface. (See also 3GPP TS 48.008, 3.2.2.1 and 3GPP TS 24.008,
- * 10.5.103 */
-
- switch (speech_ver) {
- case GSM48_BCAP_SV_FR:
- return GSM0808_PERM_FR1;
- break;
- case GSM48_BCAP_SV_HR:
- return GSM0808_PERM_HR1;
- break;
- case GSM48_BCAP_SV_EFR:
- return GSM0808_PERM_FR2;
- break;
- case GSM48_BCAP_SV_AMR_F:
- return GSM0808_PERM_FR3;
- break;
- case GSM48_BCAP_SV_AMR_H:
- return GSM0808_PERM_HR3;
- break;
- case GSM48_BCAP_SV_AMR_OFW:
- return GSM0808_PERM_FR4;
- break;
- case GSM48_BCAP_SV_AMR_OHW:
- return GSM0808_PERM_HR4;
- break;
- case GSM48_BCAP_SV_AMR_FW:
- return GSM0808_PERM_FR5;
- break;
- case GSM48_BCAP_SV_AMR_OH:
- return GSM0808_PERM_HR6;
- break;
- }
-
- /* If nothing matches, tag the result as invalid */
- LOGP(DMSC, LOGL_ERROR, "Invalid permitted speech version / rate detected, discarding.\n");
- return 0xFF;
-}
-
-/* Convert speech preference field */
-static uint8_t convert_Abis_prev_to_A_pref(int radio)
-{
- /* The Radio channel requirement field that is transmitted in the
- * Bearer capability information element, that is transmitted on the
- * Abis interfece uses a different encoding than the Channel rate and
- * type field that is signalled in the channel type element on the A
- * interface. (See also 3GPP TS 48.008, 3.2.2.1 and 3GPP TS 24.008,
- * 10.5.102 */
-
- switch (radio) {
- case GSM48_BCAP_RRQ_FR_ONLY:
- return GSM0808_SPEECH_FULL_BM;
- case GSM48_BCAP_RRQ_DUAL_FR:
- return GSM0808_SPEECH_FULL_PREF;
- case GSM48_BCAP_RRQ_DUAL_HR:
- return GSM0808_SPEECH_HALF_PREF;
- }
-
- LOGP(DMSC, LOGL_ERROR, "Invalid speech version / rate combination preference, defaulting to full rate.\n");
- return GSM0808_SPEECH_FULL_BM;
-}
-
-/* Assemble the channel type field */
-static int enc_channel_type(struct gsm0808_channel_type *ct, const struct gsm_mncc_bearer_cap *bc)
-{
- unsigned int i;
- uint8_t sv;
- unsigned int count = 0;
- bool only_gsm_hr = true;
-
- OSMO_ASSERT(ct);
- OSMO_ASSERT(bc);
-
- ct->ch_indctr = GSM0808_CHAN_SPEECH;
-
- for (i = 0; i < ARRAY_SIZE(bc->speech_ver); i++) {
- if (bc->speech_ver[i] == -1)
- break;
- sv = convert_Abis_sv_to_A_sv(bc->speech_ver[i]);
- if (sv != 0xFF) {
- /* Detect if something else than
- * GSM HR V1 is supported */
- if (sv == GSM0808_PERM_HR2 ||
- sv == GSM0808_PERM_HR3 || sv == GSM0808_PERM_HR4 || sv == GSM0808_PERM_HR6)
- only_gsm_hr = false;
-
- ct->perm_spch[count] = sv;
- count++;
- }
- }
- ct->perm_spch_len = count;
-
- if (only_gsm_hr)
- /* Note: We must avoid the usage of GSM HR1 as this
- * codec only offers very poor audio quality. If the
- * MS only supports GSM HR1 (and full rate), and has
- * a preference for half rate. Then we will ignore the
- * preference and assume a preference for full rate. */
- ct->ch_rate_type = GSM0808_SPEECH_FULL_BM;
- else
- ct->ch_rate_type = convert_Abis_prev_to_A_pref(bc->radio);
-
- if (count)
- return 0;
- else
- return -EINVAL;
-}
-
-/* Assemble the speech codec field */
-static int enc_speech_codec_list(struct gsm0808_speech_codec_list *scl, const struct gsm0808_channel_type *ct)
-{
- unsigned int i;
- int rc;
-
- memset(scl, 0, sizeof(*scl));
- for (i = 0; i < ct->perm_spch_len; i++) {
- rc = gsm0808_speech_codec_from_chan_type(&scl->codec[i], ct->perm_spch[i]);
- if (rc != 0)
- return -EINVAL;
- }
- scl->len = i;
-
- return 0;
-}
-
-/* Send assignment request via A-interface */
-int a_iface_tx_assignment(const struct gsm_trans *trans)
-{
- struct gsm_subscriber_connection *conn;
- struct gsm0808_channel_type ct;
- struct gsm0808_speech_codec_list scl;
- uint32_t *ci_ptr = NULL;
- struct msgb *msg;
- struct sockaddr_storage rtp_addr;
- struct sockaddr_in rtp_addr_in;
- int rc;
-
- OSMO_ASSERT(trans);
- conn = trans->conn;
- OSMO_ASSERT(conn);
-
- LOGP(DMSC, LOGL_ERROR, "Sending assignment command to BSC (conn_id %u)\n", conn->a.conn_id);
-
- /* Channel type */
- rc = enc_channel_type(&ct, &trans->bearer_cap);
- if (rc < 0) {
- LOGP(DMSC, LOGL_ERROR, "Faild to generate channel type -- assignment not sent!\n");
- return -EINVAL;
- }
-
- /* Speech codec list */
- rc = enc_speech_codec_list(&scl, &ct);
- if (rc < 0) {
- LOGP(DMSC, LOGL_ERROR, "Faild to generate Speech codec list -- assignment not sent!\n");
- return -EINVAL;
- }
-
- /* Package RTP-Address data */
- memset(&rtp_addr_in, 0, sizeof(rtp_addr_in));
- rtp_addr_in.sin_family = AF_INET;
- rtp_addr_in.sin_port = osmo_htons(conn->rtp.port_subscr);
- rtp_addr_in.sin_addr.s_addr = osmo_htonl(mgcpgw_client_remote_addr_n(gsm_network->mgcpgw.client));
-
- memset(&rtp_addr, 0, sizeof(rtp_addr));
- memcpy(&rtp_addr, &rtp_addr_in, sizeof(rtp_addr_in));
-
- msg = gsm0808_create_ass(&ct, NULL, &rtp_addr, &scl, ci_ptr);
-
- LOGP(DMSC, LOGL_DEBUG, "N-DATA.req(%u, %s)\n", conn->a.conn_id, osmo_hexdump(msg->data, msg->len));
- return osmo_sccp_tx_data_msg(conn->a.scu, conn->a.conn_id, msg);
-}
-
-/* Send clear command via A-interface */
-int a_iface_tx_clear_cmd(struct gsm_subscriber_connection *conn)
-{
- struct msgb *msg;
-
- LOGP(DMSC, LOGL_NOTICE, "Sending clear command to BSC (conn_id=%u)\n", conn->a.conn_id);
-
- msg = gsm0808_create_clear_command(GSM0808_CAUSE_CALL_CONTROL);
- return osmo_sccp_tx_data_msg(conn->a.scu, conn->a.conn_id, msg);
-}
-
-/* Callback function: Close all open connections */
-static void a_reset_cb(const void *priv)
-{
- struct msgb *msg;
- struct bsc_context *bsc_ctx = (struct bsc_context*) priv;
-
- /* Skip if the A interface is not properly initalized yet */
- if (!gsm_network)
- return;
-
- /* Clear all now orphaned subscriber connections */
- a_clear_all(bsc_ctx->sccp_user, &bsc_ctx->bsc_addr);
-
- /* Send reset to the remote BSC */
- LOGP(DMSC, LOGL_NOTICE, "Sending RESET to BSC %s\n", osmo_sccp_addr_dump(&bsc_ctx->bsc_addr));
- msg = gsm0808_create_reset();
- osmo_sccp_tx_unitdata_msg(bsc_ctx->sccp_user, &bsc_ctx->msc_addr,
- &bsc_ctx->bsc_addr, msg);
-}
-
-/* Add a new BSC connection to our internal list with known BSCs */
-static void add_bsc(const struct osmo_sccp_addr *msc_addr, const struct osmo_sccp_addr *bsc_addr,
- struct osmo_sccp_user *scu)
-{
- struct bsc_context *bsc_ctx;
-
- OSMO_ASSERT(bsc_addr);
- OSMO_ASSERT(msc_addr);
- OSMO_ASSERT(scu);
-
- /* Check if we already know this BSC, if yes, skip adding it. */
- if (get_reset_ctx_by_sccp_addr(bsc_addr))
- return;
-
- LOGP(DMSC, LOGL_NOTICE, "Adding new BSC connection for BSC %s...\n", osmo_sccp_addr_dump(bsc_addr));
-
- /* Generate and fill up a new bsc context */
- bsc_ctx = talloc_zero(gsm_network, struct bsc_context);
- OSMO_ASSERT(bsc_ctx);
- memcpy(&bsc_ctx->bsc_addr, bsc_addr, sizeof(*bsc_addr));
- memcpy(&bsc_ctx->msc_addr, msc_addr, sizeof(*msc_addr));
- bsc_ctx->sccp_user = scu;
- llist_add_tail(&bsc_ctx->list, &gsm_network->a.bscs);
-
- /* Start reset procedure to make the new connection active */
- bsc_ctx->reset = a_reset_alloc(bsc_ctx, osmo_sccp_addr_dump(bsc_addr), a_reset_cb, bsc_ctx);
-}
-
-/* Callback function, called by the SSCP stack when data arrives */
-static int sccp_sap_up(struct osmo_prim_hdr *oph, void *_scu)
-{
- struct osmo_sccp_user *scu = _scu;
- struct osmo_scu_prim *scu_prim = (struct osmo_scu_prim *)oph;
- int rc = 0;
- struct a_conn_info a_conn_info;
- memset(&a_conn_info, 0, sizeof(a_conn_info));
- a_conn_info.network = gsm_network;
- a_conn_info.reset = NULL;
-
- switch (OSMO_PRIM_HDR(&scu_prim->oph)) {
- case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION):
- /* Handle inbound connection indication */
- add_bsc(&scu_prim->u.connect.called_addr, &scu_prim->u.connect.calling_addr, scu);
- a_conn_info.conn_id = scu_prim->u.connect.conn_id;
- a_conn_info.msc_addr = &scu_prim->u.connect.called_addr;
- a_conn_info.bsc_addr = &scu_prim->u.connect.calling_addr;
- a_conn_info.reset = get_reset_ctx_by_sccp_addr(&scu_prim->u.unitdata.calling_addr);
-
- if (a_reset_conn_ready(a_conn_info.reset) == false) {
- rc = osmo_sccp_tx_disconn(scu, a_conn_info.conn_id, a_conn_info.msc_addr,
- SCCP_RETURN_CAUSE_UNQUALIFIED);
- break;
- }
-
- osmo_sccp_tx_conn_resp(scu, scu_prim->u.connect.conn_id, &scu_prim->u.connect.called_addr, NULL, 0);
- if (msgb_l2len(oph->msg) > 0) {
- LOGP(DMSC, LOGL_DEBUG, "N-CONNECT.ind(%u, %s)\n",
- scu_prim->u.connect.conn_id, osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
- rc = sccp_rx_dt(scu, &a_conn_info, oph->msg);
- } else
- LOGP(DMSC, LOGL_DEBUG, "N-CONNECT.ind(%u)\n", scu_prim->u.connect.conn_id);
-
- record_bsc_con(scu, scu_prim->u.connect.conn_id);
- break;
-
- case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION):
- /* Handle incoming connection oriented data */
- a_conn_info.conn_id = scu_prim->u.data.conn_id;
- LOGP(DMSC, LOGL_DEBUG, "N-DATA.ind(%u, %s)\n",
- scu_prim->u.data.conn_id, osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
- sccp_rx_dt(scu, &a_conn_info, oph->msg);
- break;
-
- case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
- /* Handle inbound UNITDATA */
- add_bsc(&scu_prim->u.unitdata.called_addr, &scu_prim->u.unitdata.calling_addr, scu);
- a_conn_info.msc_addr = &scu_prim->u.unitdata.called_addr;
- a_conn_info.bsc_addr = &scu_prim->u.unitdata.calling_addr;
- a_conn_info.reset = get_reset_ctx_by_sccp_addr(&scu_prim->u.unitdata.calling_addr);
- DEBUGP(DMSC, "N-UNITDATA.ind(%s)\n", osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
- sccp_rx_udt(scu, &a_conn_info, oph->msg);
- break;
-
- default:
- LOGP(DMSC, LOGL_ERROR, "Unhandled SIGTRAN primitive: %u:%u\n", oph->primitive, oph->operation);
- break;
- }
-
- return rc;
-}
-
-/* Clear all subscriber connections on a specified BSC */
-void a_clear_all(struct osmo_sccp_user *scu, const struct osmo_sccp_addr *bsc_addr)
-{
- struct gsm_subscriber_connection *conn;
- struct gsm_subscriber_connection *conn_temp;
- struct gsm_network *network = gsm_network;
-
- OSMO_ASSERT(scu);
- OSMO_ASSERT(bsc_addr);
-
- llist_for_each_entry_safe(conn, conn_temp, &network->subscr_conns, entry) {
- /* Clear only A connections and connections that actually
- * belong to the specified BSC */
- if (conn->via_ran == RAN_GERAN_A && memcmp(bsc_addr, &conn->a.bsc_addr, sizeof(conn->a.bsc_addr)) == 0) {
- LOGP(DMSC, LOGL_NOTICE, "Dropping orphaned subscriber connection (conn_id %i)\n",
- conn->a.conn_id);
- msc_clear_request(conn, GSM48_CC_CAUSE_SWITCH_CONG);
-
- /* If there is still an SCCP connection active, remove it now */
- if (check_connection_active(conn->a.conn_id)) {
- osmo_sccp_tx_disconn(scu, conn->a.conn_id, bsc_addr,
- SCCP_RELEASE_CAUSE_END_USER_ORIGINATED);
- a_delete_bsc_con(conn->a.conn_id);
- }
- }
- }
-}
-
-/* Initalize A interface connection between to MSC and BSC */
-int a_init(struct osmo_sccp_instance *sccp, struct gsm_network *network)
-{
- OSMO_ASSERT(sccp);
- OSMO_ASSERT(network);
-
- /* FIXME: Remove hardcoded parameters, use parameters in parameter list */
- LOGP(DMSC, LOGL_NOTICE, "Initalizing SCCP connection to stp...\n");
-
- /* Set GSM network variable, there can only be
- * one network by design */
- if (gsm_network != NULL) {
- OSMO_ASSERT(gsm_network == network);
- } else
- gsm_network = network;
-
- /* SCCP Protocol stack */
- osmo_sccp_user_bind(sccp, "OsmoMSC-A", sccp_sap_up, SCCP_SSN_BSSAP);
-
- return 0;
-}