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-rw-r--r--openbsc/src/bsc_msc_ip.c813
1 files changed, 813 insertions, 0 deletions
diff --git a/openbsc/src/bsc_msc_ip.c b/openbsc/src/bsc_msc_ip.c
new file mode 100644
index 000000000..0d441ebbc
--- /dev/null
+++ b/openbsc/src/bsc_msc_ip.c
@@ -0,0 +1,813 @@
+/* A hackish minimal BSC (+MSC +HLR) implementation */
+
+/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009 by on-waves.com
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+#include <openbsc/select.h>
+#include <openbsc/debug.h>
+#include <openbsc/e1_input.h>
+#include <openbsc/talloc.h>
+#include <openbsc/select.h>
+#include <openbsc/ipaccess.h>
+#include <openbsc/bssap.h>
+#include <openbsc/paging.h>
+#include <openbsc/signal.h>
+#include <openbsc/chan_alloc.h>
+
+#include <sccp/sccp.h>
+
+/* SCCP helper */
+#define SCCP_IT_TIMER 60
+
+/* MCC and MNC for the Location Area Identifier */
+struct gsm_network *bsc_gsmnet = 0;
+static const char *config_file = "openbsc.cfg";
+static char *msc_address = "127.0.0.1";
+static struct bsc_fd msc_connection;
+static struct in_addr local_addr;
+extern int ipacc_rtp_direct;
+
+extern int bsc_bootstrap_network(int (*layer4)(struct gsm_network *, int, void *), const char *cfg_file);
+extern int bsc_shutdown_net(struct gsm_network *net);
+
+struct bss_sccp_connection_data *bss_sccp_create_data()
+{
+ struct bss_sccp_connection_data *data;
+
+ data = _talloc_zero(tall_bsc_ctx,
+ sizeof(struct bss_sccp_connection_data),
+ "bsc<->msc");
+ if (!data)
+ return NULL;
+
+ INIT_LLIST_HEAD(&data->sccp_queue);
+ INIT_LLIST_HEAD(&data->gsm_queue);
+ return data;
+}
+
+void bss_sccp_free_data(struct bss_sccp_connection_data *data)
+{
+ bsc_del_timer(&data->T10);
+ bsc_del_timer(&data->sccp_it);
+ bsc_free_queued(data->sccp);
+ bts_free_queued(data);
+ talloc_free(data);
+}
+
+static void sccp_it_fired(void *_data)
+{
+ struct bss_sccp_connection_data *data =
+ (struct bss_sccp_connection_data *) _data;
+
+ sccp_connection_send_it(data->sccp);
+ bsc_schedule_timer(&data->sccp_it, SCCP_IT_TIMER, 0);
+}
+
+
+/* GSM subscriber drop-ins */
+extern struct llist_head *subscr_bsc_active_subscriber(void);
+struct gsm_subscriber *find_subscriber(u_int8_t type, const char *mi_string)
+{
+ struct gsm_subscriber *subscr;
+ u_int32_t tmsi = GSM_RESERVED_TMSI;
+ if (type == GSM_MI_TYPE_TMSI) {
+ tmsi = tmsi_from_string(mi_string);
+ if (tmsi == GSM_RESERVED_TMSI) {
+ DEBUGP(DMSC, "The TMSI is the reserved one.\n");
+ return NULL;
+ }
+ }
+
+ llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) {
+ if (type == GSM_MI_TYPE_TMSI && tmsi == subscr->tmsi) {
+ return subscr_get(subscr);
+ } else if (type == GSM_MI_TYPE_IMSI && strcmp(mi_string, subscr->imsi) == 0) {
+ return subscr_get(subscr);
+ }
+ }
+
+ DEBUGP(DMSC, "No subscriber has been found.\n");
+ return NULL;
+}
+
+
+
+/* SCCP handling */
+void msc_outgoing_sccp_data(struct sccp_connection *conn, struct msgb *msg, unsigned int len)
+{
+ struct bssmap_header *bs;
+
+ if (len < 1) {
+ DEBUGP(DMSC, "The header is too short.\n");
+ return;
+ }
+
+ switch (msg->l3h[0]) {
+ case BSSAP_MSG_BSS_MANAGEMENT:
+ msg->l4h = &msg->l3h[sizeof(*bs)];
+ msg->lchan = sccp_get_lchan(conn->data_ctx);
+ bssmap_rcvmsg_dt1(conn, msg, len - sizeof(*bs));
+ break;
+ case BSSAP_MSG_DTAP:
+ dtap_rcvmsg(sccp_get_lchan(conn->data_ctx), msg, len);
+ break;
+ default:
+ DEBUGPC(DMSC, "Unimplemented msg type: %d\n", msg->l3h[0]);
+ }
+}
+
+void msc_outgoing_sccp_state(struct sccp_connection *conn, int old_state)
+{
+ if (conn->connection_state >= SCCP_CONNECTION_STATE_RELEASE_COMPLETE) {
+ DEBUGP(DMSC, "Freeing sccp conn: %p state: %d\n", conn, conn->connection_state);
+ if (sccp_get_lchan(conn->data_ctx) != NULL) {
+ struct gsm_lchan *lchan = sccp_get_lchan(conn->data_ctx);
+
+ DEBUGP(DMSC, "ERROR: The lchan is still associated\n.");
+
+ lchan->msc_data = NULL;
+ put_lchan(lchan);
+ }
+
+ bss_sccp_free_data((struct bss_sccp_connection_data *)conn->data_ctx);
+ sccp_connection_free(conn);
+ return;
+ } else if (conn->connection_state == SCCP_CONNECTION_STATE_ESTABLISHED) {
+ DEBUGP(DMSC, "Connection established: %p\n", conn);
+ bsc_send_queued(conn);
+ }
+}
+
+/*
+ * General COMPLETE LAYER3 INFORMATION handling for
+ * PAGING RESPONSE, LOCATION UPDATING REQUEST, CM REESTABLISHMENT REQUEST,
+ * CM SERVICE REQUEST, IMSI DETACH, IMMEDIATE SETUP.
+ *
+ * IMMEDIATE SETUP is coming from GROUP CC that is not yet
+ * supported...
+ */
+int open_sccp_connection(struct msgb *layer3)
+{
+ struct bss_sccp_connection_data *con_data;
+ struct sccp_connection *sccp_connection;
+ struct msgb *data;
+
+ DEBUGP(DMSC, "Opening new layer3 connection\n");
+ sccp_connection = sccp_connection_socket();
+ if (!sccp_connection) {
+ DEBUGP(DMSC, "Failed to allocate memory.\n");
+ return -ENOMEM;
+ }
+
+ data = bssmap_create_layer3(layer3);
+ if (!data) {
+ DEBUGP(DMSC, "Failed to allocate complete layer3.\n");
+ sccp_connection_free(sccp_connection);
+ return -ENOMEM;
+ }
+
+ con_data = bss_sccp_create_data();
+ if (!con_data) {
+ DEBUGP(DMSC, "Failed to allocate bss<->msc data.\n");
+ sccp_connection_free(sccp_connection);
+ msgb_free(data);
+ return -ENOMEM;
+ }
+
+ /* initialize the bridge */
+ con_data->lchan = layer3->lchan;
+ con_data->sccp = sccp_connection;
+
+ sccp_connection->state_cb = msc_outgoing_sccp_state;
+ sccp_connection->data_cb = msc_outgoing_sccp_data;
+ sccp_connection->data_ctx = con_data;
+ layer3->lchan->msc_data = con_data;
+
+ /* start the inactivity test timer */
+ con_data->sccp_it.cb = sccp_it_fired;
+ con_data->sccp_it.data = con_data;
+ bsc_schedule_timer(&con_data->sccp_it, SCCP_IT_TIMER, 0);
+
+ /* FIXME: Use transaction for this */
+ use_lchan(layer3->lchan);
+ sccp_connection_connect(sccp_connection, &sccp_ssn_bssap, data);
+ msgb_free(data);
+
+ return 1;
+}
+
+/* figure out if this is the inial layer3 message */
+static int send_dtap_or_open_connection(struct msgb *msg)
+{
+ if (msg->lchan->msc_data) {
+ struct msgb *dtap = dtap_create_msg(msg, 0);
+ if (!dtap) {
+ DEBUGP(DMSC, "Creating a DTAP message failed.\n");
+ return -1;
+ }
+
+ bsc_queue_connection_write(lchan_get_sccp(msg->lchan), dtap);
+ return 1;
+ } else {
+ return open_sccp_connection(msg);
+ }
+}
+
+/* Receive a PAGING RESPONSE message from the MS */
+static int handle_paging_response(struct msgb *msg)
+{
+ struct gsm_subscriber *subscr;
+ char mi_string[GSM48_MI_SIZE];
+ u_int8_t mi_type;
+
+ gsm48_paging_extract_mi(msg, mi_string, &mi_type);
+ DEBUGP(DMSC, "PAGING RESPONSE: mi_type=0x%02x MI(%s)\n",
+ mi_type, mi_string);
+
+ subscr = find_subscriber(mi_type, mi_string);
+ if (!subscr)
+ return -EINVAL;
+
+ /* force the paging to stop at every bts */
+ subscr->lac = GSM_LAC_RESERVED_ALL_BTS;
+ if (gsm48_handle_paging_resp(msg, subscr) != 0) {
+ DEBUGP(DMSC, "Paging failed.\n");
+ return -1;
+ }
+
+ /* open a new transaction and SCCP connection */
+ return send_dtap_or_open_connection(msg);
+}
+
+/* Receive a CIPHER MODE COMPLETE from the MS */
+static int handle_cipher_m_complete(struct msgb *msg)
+{
+ struct msgb *resp;
+
+ DEBUGP(DMSC, "CIPHER MODE COMPLETE from MS, forwarding to MSC\n");
+ resp = bssmap_create_cipher_complete(msg);
+ if (!resp) {
+ DEBUGP(DMSC, "Creating MSC response failed.\n");
+ return -1;
+ }
+
+
+ /* handled this message */
+ bsc_queue_connection_write(lchan_get_sccp(msg->lchan), resp);
+ return 1;
+}
+
+/* Receive a ASSIGNMENT COMPLETE */
+static int handle_ass_compl(struct msgb *msg)
+{
+ struct gsm48_hdr *gh = msgb_l3(msg);
+
+ DEBUGP(DMSC, "ASSIGNMENT COMPLETE from MS, forwarding to MSC\n");
+
+ if (!msg->lchan->msc_data) {
+ DEBUGP(DMSC, "No MSC data\n");
+ return -1;
+ }
+
+ if (msgb_l3len(msg) - sizeof(*gh) != 1) {
+ DEBUGP(DMSC, "assignment failure invalid: %d\n",
+ msgb_l3len(msg) - sizeof(*gh));
+ return -1;
+ }
+ gsm0808_send_assignment_compl(msg->lchan, gh->data[0]);
+ return 1;
+}
+
+/*
+ * Receive a ASSIGNMENT FAILURE. If the message is failed
+ * to be parsed the T10 timer will send the failure.
+ */
+static int handle_ass_fail(struct msgb *msg)
+{
+ struct gsm48_hdr *gh = msgb_l3(msg);
+
+ DEBUGP(DMSC, "ASSIGNMENT FAILURE from MS, forwarding to MSC\n");
+ if (!msg->lchan->msc_data) {
+ DEBUGP(DMSC, "No MSC data\n");
+ return -1;
+ }
+
+ if (msgb_l3len(msg) - sizeof(*gh) != 1) {
+ DEBUGP(DMSC, "assignment failure invalid: %d\n",
+ msgb_l3len(msg) - sizeof(*gh));
+ return -1;
+ }
+
+ gsm0808_send_assignment_failure(msg->lchan,
+ GSM0808_CAUSE_RADIO_INTERFACE_MESSAGE_FAILURE, &gh->data[0]);
+ return 1;
+}
+
+/*
+ * Receive a GSM04.08 MODIFY ACK. Actually we have to check
+ * the content to see if this was a success or not.
+ */
+static int handle_modify_ack(struct msgb *msg)
+{
+ int rc;
+
+ /* modify RSL */
+ rc = gsm48_rx_rr_modif_ack(msg);
+ if (rc < 0)
+ gsm0808_send_assignment_failure(msg->lchan,
+ GSM0808_CAUSE_NO_RADIO_RESOURCE_AVAILABLE, NULL);
+ else
+ gsm0808_send_assignment_compl(msg->lchan, 0);
+
+ return 1;
+}
+
+/* Receive a GSM 04.08 Radio Resource (RR) message */
+static int gsm0408_rcv_rr(struct msgb *msg)
+{
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ int rc = 0;
+
+ switch (gh->msg_type) {
+ case GSM48_MT_RR_PAG_RESP:
+ rc = handle_paging_response(msg);
+ break;
+ case GSM48_MT_RR_MEAS_REP:
+ /* ignore measurement for now */
+ rc = -1;
+ break;
+ case GSM48_MT_RR_CIPH_M_COMPL:
+ rc = handle_cipher_m_complete(msg);
+ break;
+ case GSM48_MT_RR_ASS_COMPL:
+ rc = handle_ass_compl(msg);
+ break;
+ case GSM48_MT_RR_ASS_FAIL:
+ rc = handle_ass_fail(msg);
+ break;
+ case GSM48_MT_RR_CHAN_MODE_MODIF_ACK:
+ rc = handle_modify_ack(msg);
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+/* Receive a GSM 04.08 Mobility Management (MM) message */
+static int gsm0408_rcv_mm(struct msgb *msg)
+{
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ int rc = 0;
+
+ switch (gh->msg_type & 0xbf) {
+ case GSM48_MT_MM_LOC_UPD_REQUEST:
+ case GSM48_MT_MM_CM_REEST_REQ:
+ case GSM48_MT_MM_CM_SERV_REQ:
+ case GSM48_MT_MM_IMSI_DETACH_IND:
+ rc = send_dtap_or_open_connection(msg);
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+int gsm0408_rcvmsg(struct msgb *msg, u_int8_t link_id)
+{
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ u_int8_t pdisc = gh->proto_discr & 0x0f;
+ int rc = 0;
+
+ switch (pdisc) {
+ case GSM48_PDISC_RR:
+ rc = gsm0408_rcv_rr(msg);
+ break;
+ case GSM48_PDISC_MM:
+ rc = gsm0408_rcv_mm(msg);
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * if we have a sccp connection and didn't handle the message
+ * forward it to the MSC using DTAP
+ */
+ if (rc == 0 && msg->lchan->msc_data && lchan_get_sccp(msg->lchan)) {
+ struct msgb *dtap = dtap_create_msg(msg, link_id);
+ if (!dtap) {
+ DEBUGP(DMSC, "Creating a DTAP message failed.\n");
+ return -1;
+ }
+
+ bsc_queue_connection_write(lchan_get_sccp(msg->lchan), dtap);
+ }
+
+ return rc;
+}
+
+/* handle ipaccess signals */
+static int handle_abisip_signal(unsigned int subsys, unsigned int signal,
+ void *handler_data, void *signal_data)
+{
+ struct gsm_lchan *lchan = signal_data;
+ struct gsm_bts_trx_ts *ts;
+ int rc;
+
+ if (subsys != SS_ABISIP)
+ return 0;
+
+ ts = lchan->ts;
+
+ switch (signal) {
+ case S_ABISIP_CRCX_ACK:
+ /* we can ask it to connect now */
+ if (lchan->msc_data) {
+ DEBUGP(DMSC, "Connecting BTS to port: %d conn: %d\n",
+ lchan->msc_data->rtp_port, ts->abis_ip.conn_id);
+
+ int rtp_payload = ts->trx->bts->network->rtp_payload;
+ if (rtp_payload == 0)
+ rtp_payload = ts->abis_ip.rtp_payload2;
+
+ rc = rsl_ipacc_mdcx(lchan, ntohl(local_addr.s_addr),
+ lchan->msc_data->rtp_port,
+ ts->abis_ip.conn_id,
+ rtp_payload);
+ if (rc < 0) {
+ DEBUGP(DMSC, "Failed to send connect: %d\n", rc);
+ return rc;
+ }
+ }
+ break;
+ case S_ABISIP_DLCX_IND:
+ break;
+ }
+
+ return 0;
+}
+
+static void print_usage()
+{
+ printf("Usage: bsc_hack\n");
+}
+
+/*
+ * SCCP handling
+ */
+static int msc_sccp_write_ipa(struct msgb *msg, void *data)
+{
+ int ret;
+
+ DEBUGP(DMSC, "Sending SCCP to MSC: %u\n", msgb_l2len(msg));
+ ipaccess_prepend_header(msg, IPAC_PROTO_SCCP);
+
+
+ DEBUGP(DMI, "MSC TX %s\n", hexdump(msg->l2h, msgb_l2len(msg)));
+ ret = write(msc_connection.fd, msg->data, msg->len);
+
+ if (ret <= 0) {
+ perror("MSC: Failed to send SCCP");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int msc_sccp_accept(struct sccp_connection *connection, void *data)
+{
+ DEBUGP(DMSC, "Rejecting incoming SCCP connection.\n");
+ return -1;
+}
+
+static int msc_sccp_read(struct msgb *msgb, unsigned int length, void *data)
+{
+ struct bssmap_header *bs;
+
+ DEBUGP(DMSC, "Incoming SCCP message ftom MSC: %s\n", hexdump(msgb->l3h, length));
+
+ if (length < sizeof(*bs)) {
+ DEBUGP(DMSC, "The header is too short.\n");
+ return -1;
+ }
+
+ bs = (struct bssmap_header *) msgb->l3h;
+ if (bs->length < length - sizeof(*bs))
+ return -1;
+
+ switch (bs->type) {
+ case BSSAP_MSG_BSS_MANAGEMENT:
+ msgb->l4h = &msgb->l3h[sizeof(*bs)];
+ bssmap_rcvmsg_udt(bsc_gsmnet, msgb, length - sizeof(*bs));
+ break;
+ default:
+ DEBUGPC(DMSC, "Unimplemented msg type: %d\n", bs->type);
+ }
+
+ return 0;
+}
+
+
+/*
+ * network initialisation
+ */
+static void initialize_if_needed(void)
+{
+ if (!bsc_gsmnet) {
+ int rc;
+ struct msgb *msg;
+
+ fprintf(stderr, "Bootstraping the network. Sending GSM08.08 reset.\n");
+ rc = bsc_bootstrap_network(NULL, config_file);
+ if (rc < 0) {
+ fprintf(stderr, "Bootstrapping the network failed. exiting.\n");
+ exit(1);
+ }
+
+
+ /* send a gsm 08.08 reset message from here */
+ msg = bssmap_create_reset();
+ if (!msg) {
+ DEBUGP(DMSC, "Failed to create the reset message.\n");
+ return;
+ }
+
+ sccp_write(msg, &sccp_ssn_bssap, &sccp_ssn_bssap, 0);
+ msgb_free(msg);
+ }
+}
+
+/*
+ * callback with IP access data
+ */
+static int ipaccess_a_fd_cb(struct bsc_fd *bfd, unsigned int what)
+{
+ int error;
+ struct msgb *msg = ipaccess_read_msg(bfd, &error);
+ struct ipaccess_head *hh;
+
+ if (!msg) {
+ if (error == 0) {
+ fprintf(stderr, "The connection to the MSC was lost, exiting\n");
+ exit(-2);
+ }
+
+ fprintf(stderr, "Failed to parse ip access message: %d\n", error);
+ return -1;
+ }
+
+ DEBUGP(DMSC, "From MSC: %s proto: %d\n", hexdump(msg->data, msg->len), msg->l2h[0]);
+
+ /* handle base message handling */
+ hh = (struct ipaccess_head *) msg->data;
+ ipaccess_rcvmsg_base(msg, bfd);
+
+ /* initialize the networking. This includes sending a GSM08.08 message */
+ if (hh->proto == IPAC_PROTO_IPACCESS && msg->l2h[0] == IPAC_MSGT_ID_ACK)
+ initialize_if_needed();
+ else if (hh->proto == IPAC_PROTO_SCCP)
+ sccp_system_incoming(msg);
+
+ return 0;
+}
+
+/*
+ * Connect to the MSC
+ */
+static int connect_to_msc(const char *ip, int port)
+{
+ struct sockaddr_in sin;
+ int on = 1, ret;
+
+ printf("Attempting to connect MSC at %s:%d\n", ip, port);
+
+ msc_connection.fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ msc_connection.cb = ipaccess_a_fd_cb;
+ msc_connection.when = BSC_FD_READ;
+ msc_connection.data = NULL;
+ msc_connection.priv_nr = 1;
+
+ if (msc_connection.fd < 0) {
+ perror("Creating TCP socket failed");
+ return msc_connection.fd;
+ }
+
+
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons(port);
+ inet_aton(ip, &sin.sin_addr);
+
+ setsockopt(msc_connection.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+ ret = connect(msc_connection.fd, (struct sockaddr *) &sin, sizeof(sin));
+
+ if (ret < 0) {
+ perror("Connection failed");
+ return ret;
+ }
+
+ ret = bsc_register_fd(&msc_connection);
+ if (ret < 0) {
+ perror("Registering the fd failed");
+ close(msc_connection.fd);
+ return ret;
+ }
+
+ return ret;
+}
+
+static void print_help()
+{
+ printf(" Some useful help...\n");
+ printf(" -h --help this text\n");
+ printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n");
+ printf(" -s --disable-color\n");
+ printf(" -c --config-file filename The config file to use.\n");
+ printf(" -m --msc=IP. The address of the MSC.\n");
+ printf(" -l --local=IP. The local address of the MGCP.\n");
+}
+
+static void handle_options(int argc, char** argv)
+{
+ while (1) {
+ int option_index = 0, c;
+ static struct option long_options[] = {
+ {"help", 0, 0, 'h'},
+ {"debug", 1, 0, 'd'},
+ {"config-file", 1, 0, 'c'},
+ {"disable-color", 0, 0, 's'},
+ {"timestamp", 0, 0, 'T'},
+ {"rtp-proxy", 0, 0, 'P'},
+ {"msc", 1, 0, 'm'},
+ {"local", 1, 0, 'l'},
+ {0, 0, 0, 0}
+ };
+
+ c = getopt_long(argc, argv, "hd:sTPc:m:l:",
+ long_options, &option_index);
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'h':
+ print_usage();
+ print_help();
+ exit(0);
+ case 's':
+ debug_use_color(0);
+ break;
+ case 'd':
+ debug_parse_category_mask(optarg);
+ break;
+ case 'c':
+ config_file = strdup(optarg);
+ break;
+ case 'T':
+ debug_timestamp(1);
+ break;
+ case 'P':
+ ipacc_rtp_direct = 0;
+ break;
+ case 'm':
+ msc_address = strdup(optarg);
+ break;
+ case 'l':
+ inet_aton(optarg, &local_addr);
+ break;
+ default:
+ /* ignore */
+ break;
+ }
+ }
+}
+
+static void signal_handler(int signal)
+{
+ fprintf(stdout, "signal %u received\n", signal);
+
+ switch (signal) {
+ case SIGINT:
+ bsc_shutdown_net(bsc_gsmnet);
+ sleep(3);
+ exit(0);
+ break;
+ case SIGABRT:
+ /* in case of abort, we want to obtain a talloc report
+ * and then return to the caller, who will abort the process */
+ case SIGUSR1:
+ talloc_report_full(tall_bsc_ctx, stderr);
+ break;
+ default:
+ break;
+ }
+}
+
+static void test_mode()
+{
+ static const u_int8_t assignment_req[] = { 0x01, 0x0b, 0x03, 0x01, 0x0b, 0x25, 0x01, 0x00, 0x01 };
+ struct gsm_lchan lchan;
+ struct sccp_connection conn;
+ struct bss_sccp_connection_data data;
+
+ struct gsm_bts_trx_ts trx_ts;
+ struct gsm_bts_trx trx;
+ struct gsm_bts bts;
+ int rc;
+
+ /* initialize */
+ fprintf(stderr, "Bootstraping the network. Sending GSM08.08 reset.\n");
+ rc = bsc_bootstrap_network(NULL, config_file);
+ if (rc < 0) {
+ fprintf(stderr, "Bootstrapping the network failed. exiting.\n");
+ exit(1);
+ }
+
+ bts.network = bsc_gsmnet;
+ trx.bts = &bts;
+ trx_ts.trx = &trx;
+ lchan.ts = &trx_ts;
+
+ /* create fake data connection */
+ data.lchan = &lchan;
+ data.sccp = &conn;
+ lchan.msc_data = &data;
+ conn.data_ctx = &data;
+
+
+ struct msgb *msg = msgb_alloc(400, "test-msg");
+ msg->lchan = &lchan;
+
+ msg->l4h = msgb_put(msg, ARRAY_SIZE(assignment_req));
+ memcpy(msg->l4h, assignment_req, ARRAY_SIZE(assignment_req));
+ bssmap_rcvmsg_dt1(&conn, msg, ARRAY_SIZE(assignment_req));
+}
+
+int main(int argc, char **argv)
+{
+ int rc;
+
+ tall_bsc_ctx = talloc_named_const(NULL, 1, "openbsc");
+
+ /* parse options */
+ handle_options(argc, argv);
+
+ /* seed the PRNG */
+ srand(time(NULL));
+
+ /* initialize sccp */
+ sccp_system_init(msc_sccp_write_ipa, NULL);
+ sccp_connection_set_incoming(&sccp_ssn_bssap, msc_sccp_accept, NULL);
+ sccp_set_read(&sccp_ssn_bssap, msc_sccp_read, NULL);
+
+ /* initialize ipaccess handling */
+ register_signal_handler(SS_ABISIP, handle_abisip_signal, NULL);
+
+ rc = connect_to_msc(msc_address, 5000);
+ if (rc < 0) {
+ fprintf(stderr, "Opening the MSC connection failed.\n");
+ exit(1);
+ }
+
+ signal(SIGINT, &signal_handler);
+ signal(SIGABRT, &signal_handler);
+ signal(SIGUSR1, &signal_handler);
+
+ while (1) {
+ bsc_select_main(0);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 02:35:34 +0000