2017-04-09 10:32:51 +00:00
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/* (C) 2017 by sysmocom s.f.m.c. GmbH
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* All Rights Reserved
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*
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* Author: Philipp Maier
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <osmocom/core/utils.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/sigtran/osmo_ss7.h>
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#include <osmocom/sigtran/sccp_sap.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/gsm/gsm0808.h>
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#include <osmocom/core/msgb.h>
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2017-09-04 13:15:32 +00:00
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#include <osmocom/bsc/bsc_msc_data.h>
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#include <osmocom/bsc/debug.h>
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#include <osmocom/bsc/osmo_bsc.h>
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#include <osmocom/bsc/osmo_bsc_grace.h>
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#include <osmocom/bsc/osmo_bsc_sigtran.h>
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#include <osmocom/bsc/a_reset.h>
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#include <osmocom/bsc/gsm_04_80.h>
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2017-09-27 13:51:34 +00:00
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#include <osmocom/bsc/osmo_bsc_mgcp.h>
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2017-04-09 10:32:51 +00:00
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/* A pointer to a list with all involved MSCs
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* (a copy of the pointer location submitted with osmo_bsc_sigtran_init() */
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static struct llist_head *msc_list;
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#define RESET_INTERVAL 1 /* sek */
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#define SCCP_MSG_MAXSIZE 1024
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#define CS7_POINTCODE_DEFAULT_OFFSET 2
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/* Internal list with connections we currently maintain. This
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* list is of type struct osmo_bsc_sccp_con */
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static LLIST_HEAD(active_connections);
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/* The SCCP stack will not assign connection IDs to us automatically, we
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* will do this ourselves using a counter variable, that counts one up
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* for every new connection */
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static uint32_t conn_id_counter;
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/* Helper function to Check if the given connection id is already assigned */
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static struct osmo_bsc_sccp_con *get_bsc_conn_by_conn_id(int conn_id)
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{
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conn_id &= 0xFFFFFF;
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struct osmo_bsc_sccp_con *bsc_con;
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llist_for_each_entry(bsc_con, &active_connections, entry) {
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if (bsc_con->conn_id == conn_id)
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return bsc_con;
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}
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return NULL;
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}
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/* Pick a free connection id */
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static int pick_free_conn_id(const struct bsc_msc_data *msc)
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{
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int conn_id = conn_id_counter;
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int i;
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for (i = 0; i < 0xFFFFFF; i++) {
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conn_id++;
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conn_id &= 0xFFFFFF;
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if (get_bsc_conn_by_conn_id(conn_id) == false) {
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conn_id_counter = conn_id;
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return conn_id;
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}
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}
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return -1;
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}
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/* Send reset to MSC */
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static void osmo_bsc_sigtran_tx_reset(const struct bsc_msc_data *msc)
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{
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struct osmo_ss7_instance *ss7;
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struct msgb *msg;
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ss7 = osmo_ss7_instance_find(msc->a.cs7_instance);
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OSMO_ASSERT(ss7);
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LOGP(DMSC, LOGL_NOTICE, "Sending RESET to MSC: %s\n", osmo_sccp_addr_name(ss7, &msc->a.msc_addr));
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msg = gsm0808_create_reset();
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osmo_sccp_tx_unitdata_msg(msc->a.sccp_user, &msc->a.bsc_addr,
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&msc->a.msc_addr, msg);
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}
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/* Send reset-ack to MSC */
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void osmo_bsc_sigtran_tx_reset_ack(const struct bsc_msc_data *msc)
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{
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struct osmo_ss7_instance *ss7;
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struct msgb *msg;
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OSMO_ASSERT(msc);
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ss7 = osmo_ss7_instance_find(msc->a.cs7_instance);
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OSMO_ASSERT(ss7);
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LOGP(DMSC, LOGL_NOTICE, "Sending RESET ACK to MSC: %s\n", osmo_sccp_addr_name(ss7, &msc->a.msc_addr));
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msg = gsm0808_create_reset_ack();
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osmo_sccp_tx_unitdata_msg(msc->a.sccp_user, &msc->a.bsc_addr,
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&msc->a.msc_addr, msg);
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}
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/* Find an MSC by its sigtran point code */
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static struct bsc_msc_data *get_msc_by_addr(const struct osmo_sccp_addr *msc_addr)
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{
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struct osmo_ss7_instance *ss7;
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struct bsc_msc_data *msc;
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llist_for_each_entry(msc, msc_list, entry) {
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if (memcmp(msc_addr, &msc->a.msc_addr, sizeof(*msc_addr)) == 0)
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return msc;
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}
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ss7 = osmo_ss7_instance_find(msc->a.cs7_instance);
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OSMO_ASSERT(ss7);
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LOGP(DMSC, LOGL_ERROR, "Unable to find MSC data under address: %s\n", osmo_sccp_addr_name(ss7, msc_addr));
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return NULL;
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}
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/* Send data to MSC, use the connection id which MSC it is */
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static int handle_data_from_msc(int conn_id, struct msgb *msg)
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{
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struct osmo_bsc_sccp_con *bsc_con = get_bsc_conn_by_conn_id(conn_id);
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int rc = -EINVAL;
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if (bsc_con) {
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msg->l3h = msgb_l2(msg);
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rc = bsc_handle_dt(bsc_con, msg, msgb_l2len(msg));
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} else
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LOGP(DMSC, LOGL_NOTICE, "incoming data from unknown connection id: %i\n", conn_id);
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return rc;
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}
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/* Sent unitdata to MSC, use the point code to determine which MSC it is */
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static int handle_unitdata_from_msc(const struct osmo_sccp_addr *msc_addr, struct msgb *msg,
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const struct osmo_sccp_user *scu)
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{
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struct osmo_ss7_instance *ss7;
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struct bsc_msc_data *msc = get_msc_by_addr(msc_addr);
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int rc = -EINVAL;
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if (msc) {
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msg->l3h = msgb_l2(msg);
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rc = bsc_handle_udt(msc, msg, msgb_l2len(msg));
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} else {
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ss7 = osmo_sccp_get_ss7(osmo_sccp_get_sccp(scu));
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OSMO_ASSERT(ss7);
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LOGP(DMSC, LOGL_NOTICE, "incoming unitdata data from unknown remote address: %s\n",
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osmo_sccp_addr_name(ss7, msc_addr));
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}
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return rc;
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}
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/* Callback function, called by the SSCP stack when data arrives */
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static int sccp_sap_up(struct osmo_prim_hdr *oph, void *_scu)
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{
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struct osmo_scu_prim *scu_prim = (struct osmo_scu_prim *)oph;
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struct osmo_sccp_user *scu = _scu;
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struct osmo_bsc_sccp_con *bsc_con;
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int rc = 0;
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switch (OSMO_PRIM_HDR(&scu_prim->oph)) {
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case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
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/* Handle inbound UNITDATA */
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DEBUGP(DMSC, "N-UNITDATA.ind(%s)\n", osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
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rc = handle_unitdata_from_msc(&scu_prim->u.unitdata.calling_addr, oph->msg, scu);
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break;
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case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION):
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/* Handle (Reject) inbound connections */
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DEBUGP(DMSC, "N-CONNECT.ind(X->%u)\n", scu_prim->u.connect.conn_id);
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LOGP(DMSC, LOGL_DEBUG, "Rejecting inbound SCCP connection...\n");
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rc = osmo_sccp_tx_disconn(scu, scu_prim->u.connect.conn_id, &scu_prim->u.connect.called_addr, 0);
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break;
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case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM):
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/* Handle outbound connection confirmation */
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if (msgb_l2len(oph->msg) > 0) {
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DEBUGP(DMSC, "N-CONNECT.cnf(%u, %s)\n", scu_prim->u.connect.conn_id,
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osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
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rc = handle_data_from_msc(scu_prim->u.connect.conn_id, oph->msg);
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} else
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DEBUGP(DRANAP, "N-CONNECT.cnf(%u)\n", scu_prim->u.connect.conn_id);
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break;
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case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION):
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/* Handle incoming connection oriented data */
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DEBUGP(DMSC, "N-DATA.ind(%u, %s)\n", scu_prim->u.data.conn_id,
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osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
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/* Incoming data is a sign of a vital connection */
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bsc_con = get_bsc_conn_by_conn_id(scu_prim->u.disconnect.conn_id);
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if (bsc_con)
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a_reset_conn_success(bsc_con->msc->a.reset);
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rc = handle_data_from_msc(scu_prim->u.data.conn_id, oph->msg);
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break;
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case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION):
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/* indication of disconnect */
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if (msgb_l2len(oph->msg) > 0) {
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DEBUGP(DMSC, "N-DISCONNECT.ind(%u, %s, cause=%i)\n", scu_prim->u.disconnect.conn_id,
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osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)), scu_prim->u.disconnect.cause);
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handle_data_from_msc(scu_prim->u.disconnect.conn_id, oph->msg);
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} else
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DEBUGP(DRANAP, "N-DISCONNECT.ind(%u, cause=%i)\n", scu_prim->u.disconnect.conn_id,
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scu_prim->u.disconnect.cause);
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bsc_con = get_bsc_conn_by_conn_id(scu_prim->u.disconnect.conn_id);
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if (bsc_con) {
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/* We might have a connectivity problem. Maybe we need to go
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* through the reset procedure again? */
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if (scu_prim->u.disconnect.cause == 0)
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a_reset_conn_fail(bsc_con->msc->a.reset);
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rc = osmo_bsc_sigtran_del_conn(bsc_con);
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}
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break;
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default:
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LOGP(DMSC, LOGL_ERROR, "Unhandled SIGTRAN primitive: %u:%u\n", oph->primitive, oph->operation);
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break;
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}
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msgb_free(oph->msg);
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return rc;
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}
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/* Allocate resources to make a new connection oriented sigtran connection
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* (not the connection ittself!) */
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enum bsc_con osmo_bsc_sigtran_new_conn(struct gsm_subscriber_connection *conn, struct bsc_msc_data *msc)
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{
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struct osmo_ss7_instance *ss7;
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struct osmo_bsc_sccp_con *bsc_con;
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int conn_id;
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OSMO_ASSERT(conn);
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OSMO_ASSERT(msc);
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ss7 = osmo_ss7_instance_find(msc->a.cs7_instance);
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OSMO_ASSERT(ss7);
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LOGP(DMSC, LOGL_NOTICE, "Initializing resources for new SIGTRAN connection to MSC: %s...\n",
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osmo_sccp_addr_name(ss7, &msc->a.msc_addr));
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if (a_reset_conn_ready(msc->a.reset) == false) {
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LOGP(DMSC, LOGL_ERROR, "MSC is not connected. Dropping.\n");
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return BSC_CON_REJECT_NO_LINK;
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}
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if (!bsc_grace_allow_new_connection(conn->bts->network, conn->bts)) {
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LOGP(DMSC, LOGL_NOTICE, "BSC in grace period. No new connections.\n");
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return BSC_CON_REJECT_RF_GRACE;
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}
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bsc_con = talloc_zero(conn->bts, struct osmo_bsc_sccp_con);
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if (!bsc_con) {
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LOGP(DMSC, LOGL_ERROR, "Failed to allocate new SIGTRAN connection.\n");
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return BSC_CON_NO_MEM;
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}
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bsc_con->msc = msc;
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bsc_con->conn = conn;
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llist_add_tail(&bsc_con->entry, &active_connections);
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conn->sccp_con = bsc_con;
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/* Pick a free connection id */
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conn_id = pick_free_conn_id(msc);
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if (conn_id < 0)
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return BSC_CON_REJECT_NO_LINK;
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bsc_con->conn_id = conn_id;
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LOGP(DMSC, LOGL_NOTICE, "Allocated new connection id: %i\n", conn_id);
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return BSC_CON_SUCCESS;
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}
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/* Open a new connection oriented sigtran connection */
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int osmo_bsc_sigtran_open_conn(const struct osmo_bsc_sccp_con *conn, struct msgb *msg)
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{
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struct osmo_ss7_instance *ss7;
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struct bsc_msc_data *msc;
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int conn_id;
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int rc;
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OSMO_ASSERT(conn);
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OSMO_ASSERT(msg);
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OSMO_ASSERT(conn->msc);
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msc = conn->msc;
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if (a_reset_conn_ready(msc->a.reset) == false) {
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LOGP(DMSC, LOGL_ERROR, "MSC is not connected. Dropping.\n");
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return -EINVAL;
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}
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conn_id = conn->conn_id;
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ss7 = osmo_ss7_instance_find(msc->a.cs7_instance);
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OSMO_ASSERT(ss7);
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LOGP(DMSC, LOGL_NOTICE, "Opening new SIGTRAN connection (id=%i) to MSC: %s\n", conn_id,
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osmo_sccp_addr_name(ss7, &msc->a.msc_addr));
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|
|
rc = osmo_sccp_tx_conn_req_msg(msc->a.sccp_user, conn_id, &msc->a.bsc_addr,
|
|
|
|
&msc->a.msc_addr, msg);
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Send data to MSC */
|
|
|
|
int osmo_bsc_sigtran_send(const struct osmo_bsc_sccp_con *conn, struct msgb *msg)
|
|
|
|
{
|
|
|
|
struct osmo_ss7_instance *ss7;
|
|
|
|
int conn_id;
|
|
|
|
int rc;
|
|
|
|
struct bsc_msc_data *msc;
|
|
|
|
|
|
|
|
OSMO_ASSERT(conn);
|
|
|
|
OSMO_ASSERT(msg);
|
|
|
|
OSMO_ASSERT(conn->msc);
|
|
|
|
|
|
|
|
msc = conn->msc;
|
|
|
|
|
2017-10-23 09:36:50 +00:00
|
|
|
/* Log the type of the message we are sending. This is just
|
|
|
|
* informative, do not stop if detecting the type fails */
|
|
|
|
if (msg->len >= 3) {
|
|
|
|
switch (msg->data[0]) {
|
|
|
|
case BSSAP_MSG_BSS_MANAGEMENT:
|
|
|
|
LOGP(DMSC, LOGL_INFO, "Tx MSC %s\n", gsm0808_bssmap_name(msg->data[2]));
|
|
|
|
break;
|
|
|
|
case BSSAP_MSG_DTAP:
|
|
|
|
LOGP(DMSC, LOGL_INFO, "Tx MSC DTAP\n");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
LOGP(DMSC, LOGL_ERROR, "Tx MSC (unknwon message type)\n");
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
LOGP(DMSC, LOGL_ERROR, "Tx MSC (message too short)\n");
|
|
|
|
|
2017-04-09 10:32:51 +00:00
|
|
|
if (a_reset_conn_ready(msc->a.reset) == false) {
|
|
|
|
LOGP(DMSC, LOGL_ERROR, "MSC is not connected. Dropping.\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
conn_id = conn->conn_id;
|
|
|
|
|
|
|
|
ss7 = osmo_ss7_instance_find(msc->a.cs7_instance);
|
|
|
|
OSMO_ASSERT(ss7);
|
2017-10-23 09:51:14 +00:00
|
|
|
LOGP(DMSC, LOGL_DEBUG, "Sending connection (id=%i) oriented data to MSC: %s (%s)\n",
|
|
|
|
conn_id, osmo_sccp_addr_name(ss7, &msc->a.msc_addr), osmo_hexdump(msg->data, msg->len));
|
2017-04-09 10:32:51 +00:00
|
|
|
|
|
|
|
rc = osmo_sccp_tx_data_msg(msc->a.sccp_user, conn_id, msg);
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Delete a connection from the list with open connections
|
|
|
|
* (called by osmo_bsc_api.c on failing open connections and
|
|
|
|
* locally, when a connection is closed by the MSC */
|
|
|
|
int osmo_bsc_sigtran_del_conn(struct osmo_bsc_sccp_con *conn)
|
|
|
|
{
|
|
|
|
if (!conn)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (conn->conn) {
|
|
|
|
LOGP(DMSC, LOGL_ERROR,
|
|
|
|
"sccp connection (id=%i) not cleared (gsm subscriber connection still active) -- forcefully clearing it now!\n",
|
|
|
|
conn->conn_id);
|
|
|
|
bsc_subscr_con_free(conn->conn);
|
|
|
|
conn->conn = NULL;
|
|
|
|
|
|
|
|
/* This bahaviour might be caused by a bad connection. Maybe we
|
|
|
|
* will have to go through the reset procedure again */
|
|
|
|
a_reset_conn_fail(conn->msc->a.reset);
|
|
|
|
}
|
|
|
|
|
2017-09-27 13:51:34 +00:00
|
|
|
/* Remove mgcp context if existant */
|
2017-12-18 17:27:43 +00:00
|
|
|
if (conn->user_plane.mgcp_ctx)
|
|
|
|
mgcp_free_ctx(conn->user_plane.mgcp_ctx);
|
2017-09-27 13:51:34 +00:00
|
|
|
|
2017-04-09 10:32:51 +00:00
|
|
|
llist_del(&conn->entry);
|
|
|
|
talloc_free(conn);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Send an USSD notification in case we loose the connection to the MSC */
|
|
|
|
static void bsc_notify_msc_lost(const struct osmo_bsc_sccp_con *conn)
|
|
|
|
{
|
|
|
|
struct gsm_subscriber_connection *subscr_conn;
|
|
|
|
|
|
|
|
/* Check if sccp conn is still present */
|
|
|
|
if (!conn)
|
|
|
|
return;
|
|
|
|
subscr_conn = conn->conn;
|
|
|
|
|
|
|
|
/* send USSD notification if string configured and conn->data is set */
|
|
|
|
if (!subscr_conn)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* check for config string */
|
|
|
|
if (!conn->msc->ussd_msc_lost_txt)
|
|
|
|
return;
|
|
|
|
if (conn->msc->ussd_msc_lost_txt[0] == '\0')
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* send USSD notification */
|
|
|
|
bsc_send_ussd_notify(subscr_conn, 1, subscr_conn->sccp_con->msc->ussd_msc_lost_txt);
|
|
|
|
bsc_send_ussd_release_complete(subscr_conn);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Close all open sigtran connections and channels */
|
|
|
|
void osmo_bsc_sigtran_reset(const struct bsc_msc_data *msc)
|
|
|
|
{
|
|
|
|
struct osmo_bsc_sccp_con *conn;
|
|
|
|
struct osmo_bsc_sccp_con *conn_temp;
|
|
|
|
OSMO_ASSERT(msc);
|
|
|
|
|
|
|
|
/* Close all open connections */
|
|
|
|
llist_for_each_entry_safe(conn, conn_temp, &active_connections, entry) {
|
|
|
|
|
|
|
|
/* We only may close connections which actually belong to this
|
|
|
|
* MSC. All other open connections are left untouched */
|
|
|
|
if (conn->msc == msc) {
|
|
|
|
/* Notify active connection users via USSD that the MSC is down */
|
|
|
|
bsc_notify_msc_lost(conn);
|
|
|
|
|
|
|
|
/* Take down all occopied RF channels */
|
|
|
|
if (conn->conn)
|
|
|
|
gsm0808_clear(conn->conn);
|
|
|
|
|
|
|
|
/* Disconnect all Sigtran connections */
|
|
|
|
osmo_sccp_tx_disconn(msc->a.sccp_user, conn->conn_id, &msc->a.bsc_addr, 0);
|
|
|
|
|
|
|
|
/* Delete subscriber connection */
|
|
|
|
osmo_bsc_sigtran_del_conn(conn);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Callback function: Close all open connections */
|
|
|
|
static void osmo_bsc_sigtran_reset_cb(const void *priv)
|
|
|
|
{
|
|
|
|
struct bsc_msc_data *msc = (struct bsc_msc_data*) priv;
|
|
|
|
|
|
|
|
/* Shut down all ongoing traffic */
|
|
|
|
osmo_bsc_sigtran_reset(msc);
|
|
|
|
|
|
|
|
/* Send reset to MSC */
|
|
|
|
osmo_bsc_sigtran_tx_reset(msc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Default point-code to be used as local address (BSC) */
|
|
|
|
#define BSC_DEFAULT_PC "0.23.3"
|
|
|
|
|
|
|
|
/* Default point-code to be used as remote address (MSC) */
|
|
|
|
#define MSC_DEFAULT_PC "0.23.1"
|
|
|
|
|
|
|
|
/* Initalize osmo sigtran backhaul */
|
|
|
|
int osmo_bsc_sigtran_init(struct llist_head *mscs)
|
|
|
|
{
|
|
|
|
bool free_attempt_used = false;
|
|
|
|
bool fail_on_next_invalid_cfg = false;
|
|
|
|
|
|
|
|
struct bsc_msc_data *msc;
|
|
|
|
char msc_name[32];
|
|
|
|
uint32_t default_pc;
|
|
|
|
|
|
|
|
OSMO_ASSERT(mscs);
|
|
|
|
msc_list = mscs;
|
|
|
|
|
|
|
|
llist_for_each_entry(msc, msc_list, entry) {
|
|
|
|
snprintf(msc_name, sizeof(msc_name), "msc-%u", msc->nr);
|
|
|
|
LOGP(DMSC, LOGL_NOTICE, "Initializing SCCP connection to MSC %s\n", msc_name);
|
|
|
|
|
|
|
|
/* Check if the VTY could determine a valid CS7 instance,
|
|
|
|
* use safe default in case none is set */
|
|
|
|
if (msc->a.cs7_instance_valid == false) {
|
|
|
|
msc->a.cs7_instance = 0;
|
|
|
|
if (fail_on_next_invalid_cfg)
|
|
|
|
goto fail_auto_cofiguration;
|
|
|
|
free_attempt_used = true;
|
|
|
|
}
|
|
|
|
LOGP(DMSC, LOGL_NOTICE, "CS7 Instance identifier, A-Interface: %u\n", msc->a.cs7_instance);
|
|
|
|
|
|
|
|
/* Pre-Check if there is an ss7 instance present */
|
|
|
|
if (osmo_ss7_instance_find(msc->a.cs7_instance) == NULL) {
|
|
|
|
if (fail_on_next_invalid_cfg)
|
|
|
|
goto fail_auto_cofiguration;
|
|
|
|
free_attempt_used = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* SS7 Protocol stack */
|
|
|
|
default_pc = osmo_ss7_pointcode_parse(NULL, BSC_DEFAULT_PC);
|
|
|
|
msc->a.sccp =
|
|
|
|
osmo_sccp_simple_client_on_ss7_id(msc, msc->a.cs7_instance, msc_name, default_pc,
|
|
|
|
OSMO_SS7_ASP_PROT_M3UA, 0, NULL, 0, NULL);
|
|
|
|
if (!msc->a.sccp)
|
|
|
|
return -EINVAL;
|
|
|
|
|
osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
|
|
|
/* If unset, use default local SCCP address */
|
|
|
|
if (!msc->a.bsc_addr.presence)
|
2017-12-18 16:57:35 +00:00
|
|
|
osmo_sccp_local_addr_by_instance(&msc->a.bsc_addr, msc->a.sccp,
|
|
|
|
OSMO_SCCP_SSN_BSSAP);
|
osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
|
|
|
|
|
|
|
if (!osmo_sccp_check_addr(&msc->a.bsc_addr, OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC)) {
|
|
|
|
LOGP(DMSC, LOGL_ERROR,
|
|
|
|
"(%s) A-interface: invalid local (BSC) SCCP address: %s\n",
|
2017-11-08 01:39:03 +00:00
|
|
|
msc_name, osmo_sccp_inst_addr_name(msc->a.sccp, &msc->a.bsc_addr));
|
osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
|
|
|
return -EINVAL;
|
2017-04-09 10:32:51 +00:00
|
|
|
}
|
|
|
|
|
osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
|
|
|
/* If unset, use default SCCP address for the MSC */
|
|
|
|
if (!msc->a.msc_addr.presence)
|
|
|
|
osmo_sccp_make_addr_pc_ssn(&msc->a.msc_addr,
|
|
|
|
osmo_ss7_pointcode_parse(NULL, MSC_DEFAULT_PC),
|
2017-12-18 16:57:35 +00:00
|
|
|
OSMO_SCCP_SSN_BSSAP);
|
2017-04-09 10:32:51 +00:00
|
|
|
|
osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
|
|
|
if (!osmo_sccp_check_addr(&msc->a.msc_addr, OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC)) {
|
|
|
|
LOGP(DMSC, LOGL_ERROR,
|
|
|
|
"(%s) A-interface: invalid remote (MSC) SCCP address: %s\n",
|
2017-11-08 01:39:03 +00:00
|
|
|
msc_name, osmo_sccp_inst_addr_name(msc->a.sccp, &msc->a.msc_addr));
|
osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
|
|
|
return -EINVAL;
|
2017-04-09 10:32:51 +00:00
|
|
|
}
|
|
|
|
|
osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
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LOGP(DMSC, LOGL_NOTICE, "(%s) A-interface: local (BSC) SCCP address: %s\n",
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2017-11-08 01:39:03 +00:00
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msc_name, osmo_sccp_inst_addr_name(msc->a.sccp, &msc->a.bsc_addr));
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osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
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LOGP(DMSC, LOGL_NOTICE, "(%s) A-interface: remote (MSC) SCCP address: %s\n",
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2017-11-08 01:39:03 +00:00
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msc_name, osmo_sccp_inst_addr_name(msc->a.sccp, &msc->a.msc_addr));
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osmo-bsc: SCCP addrs: default only if unset, reject invalid
So far, if the user entered an invalid SCCP address in the config, the
osmo_bsc_sigtran_init() code simply replaced that with the default, i.e.
running with a completely different address than the user may intend.
Use the default SCCP addresses only when they are unset by the user.
Default MSC addr: set directly, do not detour via cs7 instance PC. The default
MSC SCCP addr is just a point code + SSN, deriving it from the cs7 instance
first is a confusing step. Just set the PC and SSN, and done.
Using default addresses does not constitute an "auto configuration": if we set
up a cs7 instance automatically, we do not want to have to create a second one
automatically, to prevent "auto-confusion", and want to bail instead. But for
each MSC on its own, using default SCCP addresses makes sense and is orthogonal
to automatic cs7 instance creation. Hence drop the auto config semantics from
the default SCCP address parts.
Always validate the SCCP addresses we will end up using, and bail immediately
if they are erratic. i.e. don't overwrite a non-empty invalid SCCP address with
defaults, but straight bail.
Beneficial side effects:
- Fix some grammar ultra confusion in log messages.
- Add context: log the MSC number the logging refers to.
- Drop code dup: since we're always logging the used SCCP addresses, might as
well log those once, unconditionally, in the end.
Change-Id: Iadbc2e9740457e1b389b7e7ad9c94274e7d8cb11
2017-11-08 00:03:07 +00:00
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2017-04-09 10:32:51 +00:00
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/* Bind SCCP user */
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msc->a.sccp_user = osmo_sccp_user_bind(msc->a.sccp, msc_name, sccp_sap_up, msc->a.bsc_addr.ssn);
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if (!msc->a.sccp_user)
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return -EINVAL;
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/* Start MSC-Reset procedure */
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msc->a.reset = a_reset_alloc(msc, msc_name, osmo_bsc_sigtran_reset_cb, msc);
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if (!msc->a.reset)
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return -EINVAL;
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/* If we have detected that the SS7 configuration of the MSC we have just initalized
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* was incomplete or completely missing, we can not tolerate another incomplete
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* configuration. The reson for this is that we do only specify exactly one default
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* pointcode pair. We also specify localhost as default IP-Address. If we have wanted
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* to support multiple MSCs with automatic configuration we would be forced to invent
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* a complex ruleset how to allocate the pointcodes and respective IP-Addresses.
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* Furthermore, the situation where a single BSC is connected to multiple MSCs
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* is a very rare situation anyway. In this case we expect the user to experienced
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* enough to create a valid SS7/CS7 VTY configuration that does not lack any
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* components */
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if (free_attempt_used)
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fail_on_next_invalid_cfg = true;
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}
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return 0;
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fail_auto_cofiguration:
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LOGP(DMSC, LOGL_ERROR,
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"A-interface: More than one invalid/inclomplete configuration detected, unable to revover - check config file!\n");
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return -EINVAL;
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}
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