move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 462 insertions, 0 deletions

diff --git a/src/gprs/sgsn_main.c b/src/gprs/sgsn_main.c
new file mode 100644
index 000000000..04f2825f7
--- /dev/null
+++ b/src/gprs/sgsn_main.c
@@ -0,0 +1,462 @@
+/* GPRS SGSN Implementation */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.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 <unistd.h>
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocom/core/application.h>
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/rate_ctr.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/stats.h>
+
+#include <osmocom/gprs/gprs_ns.h>
+#include <osmocom/gprs/gprs_bssgp.h>
+
+#include <osmocom/vty/telnet_interface.h>
+#include <osmocom/vty/logging.h>
+#include <osmocom/vty/stats.h>
+#include <osmocom/vty/ports.h>
+
+#include <osmocom/ctrl/control_vty.h>
+
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/vty.h>
+#include <openbsc/sgsn.h>
+#include <openbsc/gprs_llc.h>
+#include <openbsc/gprs_gmm.h>
+#include <openbsc/iu.h>
+
+#include <osmocom/ctrl/control_if.h>
+#include <osmocom/ctrl/ports.h>
+
+#include <gtp.h>
+
+#include "../../bscconfig.h"
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+void *tall_bsc_ctx;
+
+struct gprs_ns_inst *sgsn_nsi;
+static int daemonize = 0;
+const char *openbsc_copyright =
+	"Copyright (C) 2010 Harald Welte and On-Waves\r\n"
+	"License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
+	"This is free software: you are free to change and redistribute it.\r\n"
+	"There is NO WARRANTY, to the extent permitted by law.\r\n";
+
+static struct sgsn_instance sgsn_inst = {
+	.config_file = "osmo_sgsn.cfg",
+	.cfg = {
+		.gtp_statedir = "./",
+		.auth_policy = SGSN_AUTH_POLICY_CLOSED,
+	},
+};
+struct sgsn_instance *sgsn = &sgsn_inst;
+
+/* call-back function for the NS protocol */
+static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
+		      struct msgb *msg, uint16_t bvci)
+{
+	int rc = 0;
+
+	switch (event) {
+	case GPRS_NS_EVT_UNIT_DATA:
+		/* hand the message into the BSSGP implementation */
+		rc = bssgp_rcvmsg(msg);
+		break;
+	default:
+		LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
+		if (msg)
+			msgb_free(msg);
+		rc = -EIO;
+		break;
+	}
+	return rc;
+}
+
+/* call-back function for the BSSGP protocol */
+int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
+{
+	struct osmo_bssgp_prim *bp;
+	bp = container_of(oph, struct osmo_bssgp_prim, oph);
+
+	switch (oph->sap) {
+	case SAP_BSSGP_LL:
+		switch (oph->primitive) {
+		case PRIM_BSSGP_UL_UD:
+			return gprs_llc_rcvmsg(oph->msg, bp->tp);
+		}
+		break;
+	case SAP_BSSGP_GMM:
+		switch (oph->primitive) {
+		case PRIM_BSSGP_GMM_SUSPEND:
+			return gprs_gmm_rx_suspend(bp->ra_id, bp->tlli);
+		case PRIM_BSSGP_GMM_RESUME:
+			return gprs_gmm_rx_resume(bp->ra_id, bp->tlli,
+						  bp->u.resume.suspend_ref);
+		}
+		break;
+	case SAP_BSSGP_NM:
+		break;
+	}
+	return 0;
+}
+
+static void signal_handler(int signal)
+{
+	fprintf(stdout, "signal %u received\n", signal);
+
+	switch (signal) {
+	case SIGINT:
+		osmo_signal_dispatch(SS_L_GLOBAL, S_L_GLOBAL_SHUTDOWN, NULL);
+		sleep(1);
+		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(tall_vty_ctx, stderr);
+		talloc_report_full(tall_bsc_ctx, stderr);
+		break;
+	case SIGUSR2:
+		talloc_report_full(tall_vty_ctx, stderr);
+		break;
+	default:
+		break;
+	}
+}
+
+/* NSI that BSSGP uses when transmitting on NS */
+extern struct gprs_ns_inst *bssgp_nsi;
+
+extern int bsc_vty_go_parent(struct vty *vty);
+
+static struct vty_app_info vty_info = {
+	.name 		= "OsmoSGSN",
+	.version	= PACKAGE_VERSION,
+	.go_parent_cb	= bsc_vty_go_parent,
+	.is_config_node	= bsc_vty_is_config_node,
+};
+
+static void print_help(void)
+{
+	printf("Some useful help...\n");
+	printf("  -h --help\tthis text\n");
+	printf("  -D --daemonize\tFork the process into a background daemon\n");
+	printf("  -d option --debug\tenable Debugging\n");
+	printf("  -s --disable-color\n");
+	printf("  -c --config-file\tThe config file to use [%s]\n", sgsn->config_file);
+	printf("  -e --log-level number\tSet a global log level\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'},
+			{"daemonize", 0, 0, 'D'},
+			{"config-file", 1, 0, 'c'},
+			{"disable-color", 0, 0, 's'},
+			{"timestamp", 0, 0, 'T'},
+			{ "version", 0, 0, 'V' },
+			{"log-level", 1, 0, 'e'},
+			{NULL, 0, 0, 0}
+		};
+
+		c = getopt_long(argc, argv, "hd:Dc:sTVe:",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h':
+			//print_usage();
+			print_help();
+			exit(0);
+		case 's':
+			log_set_use_color(osmo_stderr_target, 0);
+			break;
+		case 'd':
+			log_parse_category_mask(osmo_stderr_target, optarg);
+			break;
+		case 'D':
+			daemonize = 1;
+			break;
+		case 'c':
+			sgsn_inst.config_file = strdup(optarg);
+			break;
+		case 'T':
+			log_set_print_timestamp(osmo_stderr_target, 1);
+			break;
+		case 'V':
+			print_version(1);
+			exit(0);
+			break;
+		case 'e':
+			log_set_log_level(osmo_stderr_target, atoi(optarg));
+			break;
+		default:
+			/* ignore */
+			break;
+		}
+	}
+}
+
+/* default categories */
+static struct log_info_cat gprs_categories[] = {
+	[DMM] = {
+		.name = "DMM",
+		.description = "Layer3 Mobility Management (MM)",
+		.color = "\033[1;33m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
+	},
+	[DPAG]	= {
+		.name = "DPAG",
+		.description = "Paging Subsystem",
+		.color = "\033[1;38m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
+	},
+	[DMEAS] = {
+		.name = "DMEAS",
+		.description = "Radio Measurement Processing",
+		.enabled = 0, .loglevel = LOGL_NOTICE,
+	},
+	[DREF] = {
+		.name = "DREF",
+		.description = "Reference Counting",
+		.enabled = 0, .loglevel = LOGL_NOTICE,
+	},
+	[DGPRS] = {
+		.name = "DGPRS",
+		.description = "GPRS Packet Service",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+	[DNS] = {
+		.name = "DNS",
+		.description = "GPRS Network Service (NS)",
+		.enabled = 1, .loglevel = LOGL_INFO,
+	},
+	[DBSSGP] = {
+		.name = "DBSSGP",
+		.description = "GPRS BSS Gateway Protocol (BSSGP)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+	[DLLC] = {
+		.name = "DLLC",
+		.description = "GPRS Logical Link Control Protocol (LLC)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+	[DSNDCP] = {
+		.name = "DSNDCP",
+		.description = "GPRS Sub-Network Dependent Control Protocol (SNDCP)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+	[DRANAP] = {
+		.name = "DRANAP",
+		.description = "RAN Application Part (RANAP)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+	[DSUA] = {
+		.name = "DSUA",
+		.description = "SCCP User Adaptation (SUA)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+	[DSLHC] = {
+		.name = "DSLHC",
+		.description = "RFC1144 TCP/IP Header compression (SLHC)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+	[DV42BIS] = {
+		.name = "DV42BIS",
+		.description = "V.42bis data compression (SNDCP)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	}
+};
+
+static const struct log_info gprs_log_info = {
+	.filter_fn = gprs_log_filter_fn,
+	.cat = gprs_categories,
+	.num_cat = ARRAY_SIZE(gprs_categories),
+};
+
+/* Implement the extern asn_debug from libasn1c to indicate whether the ASN.1
+ * binary code decoded and encoded during Iu communication should be logged to
+ * stderr. See osmocom's libasn1c, asn_internal.h, at "if (asn_debug)":
+ * http://git.osmocom.org/libasn1c/tree/include/asn1c/asn_internal.h */
+int asn_debug = 0;
+
+int sgsn_ranap_iu_event(struct ue_conn_ctx *ctx, enum iu_event_type type, void *data);
+
+int main(int argc, char **argv)
+{
+	struct ctrl_handle *ctrl;
+	struct gsm_network dummy_network;
+	int rc;
+
+	srand(time(NULL));
+	tall_bsc_ctx = talloc_named_const(NULL, 0, "osmo_sgsn");
+	msgb_talloc_ctx_init(tall_bsc_ctx, 0);
+
+	signal(SIGINT, &signal_handler);
+	signal(SIGABRT, &signal_handler);
+	signal(SIGUSR1, &signal_handler);
+	signal(SIGUSR2, &signal_handler);
+
+	osmo_init_ignore_signals();
+	osmo_init_logging(&gprs_log_info);
+	osmo_stats_init(tall_bsc_ctx);
+
+	vty_info.copyright = openbsc_copyright;
+	vty_init(&vty_info);
+	logging_vty_add_cmds(NULL);
+	osmo_stats_vty_add_cmds(&gprs_log_info);
+	sgsn_vty_init();
+	ctrl_vty_init(tall_bsc_ctx);
+#ifdef BUILD_IU
+	iu_vty_init(&asn_debug);
+#endif
+
+	handle_options(argc, argv);
+
+	rate_ctr_init(tall_bsc_ctx);
+
+	gprs_ns_set_log_ss(DNS);
+	bssgp_set_log_ss(DBSSGP);
+
+	sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb, tall_bsc_ctx);
+	if (!sgsn_nsi) {
+		LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
+		exit(1);
+	}
+	bssgp_nsi = sgsn_inst.cfg.nsi = sgsn_nsi;
+
+	gprs_llc_init("/usr/local/lib/osmocom/crypt/");
+	sgsn_rate_ctr_init();
+	sgsn_inst_init();
+
+	gprs_ns_vty_init(bssgp_nsi);
+	bssgp_vty_init();
+	gprs_llc_vty_init();
+	gprs_sndcp_vty_init();
+	sgsn_auth_init();
+	sgsn_cdr_init(&sgsn_inst);
+	/* FIXME: register signal handler for SS_L_NS */
+
+	rc = sgsn_parse_config(sgsn_inst.config_file, &sgsn_inst.cfg);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Error in config file\n");
+		exit(2);
+	}
+
+	/* start telnet after reading config for vty_get_bind_addr() */
+	rc = telnet_init_dynif(tall_bsc_ctx, &dummy_network,
+			       vty_get_bind_addr(), OSMO_VTY_PORT_SGSN);
+	if (rc < 0)
+		exit(1);
+
+	/* start control interface after reading config for
+	 * ctrl_vty_get_bind_addr() */
+	ctrl = sgsn_controlif_setup(NULL, ctrl_vty_get_bind_addr(),
+				    OSMO_CTRL_PORT_SGSN);
+	if (!ctrl) {
+		LOGP(DGPRS, LOGL_ERROR, "Failed to create CTRL interface.\n");
+		exit(1);
+	}
+
+	if (sgsn_ctrl_cmds_install() != 0) {
+		LOGP(DGPRS, LOGL_ERROR, "Failed to install CTRL commands.\n");
+		exit(1);
+	}
+
+
+	rc = sgsn_gtp_init(&sgsn_inst);
+	if (rc) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on GTP socket\n");
+		exit(2);
+	}
+
+	rc = gprs_subscr_init(&sgsn_inst);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot set up subscriber management\n");
+		exit(2);
+	}
+
+	rc = gprs_ns_nsip_listen(sgsn_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n");
+		exit(2);
+	}
+
+	rc = gprs_ns_frgre_listen(sgsn_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE "
+			"socket. Do you have CAP_NET_RAW?\n");
+		exit(2);
+	}
+
+	if (sgsn->cfg.dynamic_lookup) {
+		if (sgsn_ares_init(sgsn) != 0) {
+			LOGP(DGPRS, LOGL_FATAL,
+				"Failed to initialize c-ares(%d)\n", rc);
+			exit(4);
+		}
+	}
+
+#ifdef BUILD_IU
+	iu_init(tall_bsc_ctx, "127.0.0.2", 14001, gsm0408_gprs_rcvmsg_iu, sgsn_ranap_iu_event);
+#endif
+
+	if (daemonize) {
+		rc = osmo_daemonize();
+		if (rc < 0) {
+			perror("Error during daemonize");
+			exit(1);
+		}
+	}
+
+	while (1) {
+		rc = osmo_select_main(0);
+		if (rc < 0)
+			exit(3);
+	}
+
+	/* not reached */
+	exit(0);
+}