host/trxcon: introduce a new 'trxcon' application

This app is similar to the osmocon, but designed to
connect L2 & L3 apps with SDR transceiver insted of
obsolete Calypso based hardware.

Change-Id: Ie3c17f19aad9c26f3c49966a7c96b65911f62369

1 files changed, 193 insertions, 0 deletions

diff --git a/src/host/trxcon/trxcon.c b/src/host/trxcon/trxcon.c
new file mode 100644
index 00000000..03664ca6
--- /dev/null
+++ b/src/host/trxcon/trxcon.c
@@ -0,0 +1,193 @@
+/*
+ * OsmocomBB <-> SDR connection bridge
+ *
+ * (C) 2016-2017 by Vadim Yanitskiy <axilirator@gmail.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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <signal.h>
+
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/signal.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/application.h>
+
+#include "logging.h"
+
+#define COPYRIGHT \
+	"Copyright (C) 2016-2017 by Vadim Yanitskiy <axilirator@gmail.com>\n" \
+	"License GPLv2+: GNU GPL version 2 or later " \
+	"<http://gnu.org/licenses/gpl.html>\n" \
+	"This is free software: you are free to change and redistribute it.\n" \
+	"There is NO WARRANTY, to the extent permitted by law.\n\n"
+
+static struct {
+	const char *debug_mask;
+	int daemonize;
+	int quit;
+
+	const char *trx_ip;
+	uint16_t trx_base_port;
+	const char *bind_socket;
+} app_data;
+
+void *tall_trx_ctx = NULL;
+
+static void print_usage(const char *app)
+{
+	printf("Usage: %s\n", app);
+}
+
+static void print_help(void)
+{
+	printf(" Some help...\n");
+	printf("  -h --help         this text\n");
+	printf("  -d --debug        Change debug flags. Default: %s\n", DEBUG_DEFAULT);
+	printf("  -i --trx-ip       IP address of host runing TRX (default 127.0.0.1)\n");
+	printf("  -p --trx-port     Base port of TRX instance (default 5700)\n");
+	printf("  -s --socket       Listening socket for layer23 (default /tmp/osmocom_l2)\n");
+	printf("  -D --daemonize    Run as daemon\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'},
+			{"socket", 1, 0, 's'},
+			{"trx-ip", 1, 0, 'i'},
+			{"trx-port", 1, 0, 'p'},
+			{"daemonize", 0, 0, 'D'},
+			{0, 0, 0, 0}
+		};
+
+		c = getopt_long(argc, argv, "d:i:p:s:Dh",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h':
+			print_usage(argv[0]);
+			print_help();
+			exit(0);
+			break;
+		case 'd':
+			app_data.debug_mask = optarg;
+			break;
+		case 'i':
+			app_data.trx_ip = optarg;
+			break;
+		case 'p':
+			app_data.trx_base_port = atoi(optarg);
+			break;
+		case 's':
+			app_data.bind_socket = optarg;
+			break;
+		case 'D':
+			app_data.daemonize = 1;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+static void init_defaults(void)
+{
+	app_data.bind_socket = "/tmp/osmocom_l2";
+	app_data.trx_ip = "127.0.0.1";
+	app_data.trx_base_port = 5700;
+
+	app_data.debug_mask = NULL;
+	app_data.daemonize = 0;
+	app_data.quit = 0;
+}
+
+static void signal_handler(int signal)
+{
+	fprintf(stderr, "signal %u received\n", signal);
+
+	switch (signal) {
+	case SIGINT:
+		app_data.quit++;
+		break;
+	case SIGABRT:
+	case SIGUSR1:
+	case SIGUSR2:
+		talloc_report_full(tall_trx_ctx, stderr);
+		break;
+	default:
+		break;
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int rc = 0;
+
+	printf("%s", COPYRIGHT);
+	init_defaults();
+	handle_options(argc, argv);
+
+	/* Init talloc memory management system */
+	tall_trx_ctx = talloc_init("trxcon context");
+	msgb_talloc_ctx_init(tall_trx_ctx, 0);
+
+	/* Setup signal handlers */
+	signal(SIGINT, &signal_handler);
+	signal(SIGUSR1, &signal_handler);
+	signal(SIGUSR2, &signal_handler);
+	osmo_init_ignore_signals();
+
+	/* Init logging system */
+	trx_log_init(app_data.debug_mask);
+
+	/* Currently nothing to do */
+	print_usage(argv[0]);
+	print_help();
+	goto exit;
+
+	if (app_data.daemonize) {
+		rc = osmo_daemonize();
+		if (rc < 0) {
+			perror("Error during daemonize");
+			goto exit;
+		}
+	}
+
+	while (!app_data.quit)
+		osmo_select_main(0);
+
+exit:
+	/* Make Valgrind happy */
+	log_fini();
+	talloc_free(tall_trx_ctx);
+
+	return rc;
+}