ggsn: Split application lifecycle related code into ggsn_main.c
This way we further shrink ggsn.c and leave there GGSN related code.
Change-Id: I9e6a3beac7657f0a8c02d514b54c6f1caa93bba7
diff --git a/ggsn/ggsn_main.c b/ggsn/ggsn_main.c
new file mode 100644
index 0000000..81a8ab1
--- /dev/null
+++ b/ggsn/ggsn_main.c
@@ -0,0 +1,208 @@
+/*
+ * OsmoGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002, 2003, 2004 Mondru AB.
+ * Copyright (C) 2017-2019 by Harald Welte <laforge@gnumonks.org>
+ * Copyright (C) 2019 sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ */
+
+#include "../config.h"
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+
+#include <getopt.h>
+#include <ctype.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
+#include <osmocom/core/application.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/stats.h>
+#include <osmocom/core/rate_ctr.h>
+#include <osmocom/core/timer.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/ctrl/control_if.h>
+#include <osmocom/ctrl/control_cmd.h>
+#include <osmocom/ctrl/control_vty.h>
+#include <osmocom/ctrl/ports.h>
+#include <osmocom/vty/telnet_interface.h>
+#include <osmocom/vty/logging.h>
+#include <osmocom/vty/stats.h>
+#include <osmocom/vty/ports.h>
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/misc.h>
+
+#include "ggsn.h"
+
+void *tall_ggsn_ctx;
+
+static int end = 0;
+static int daemonize = 0;
+struct ctrl_handle *g_ctrlh;
+
+struct ul255_t qos;
+struct ul255_t apn;
+
+static char *config_file = "osmo-ggsn.cfg";
+
+/* To exit gracefully. Used with GCC compilation flag -pg and gprof */
+static void signal_handler(int s)
+{
+ LOGP(DGGSN, LOGL_NOTICE, "signal %d received\n", s);
+ switch (s) {
+ case SIGINT:
+ case SIGTERM:
+ LOGP(DGGSN, LOGL_NOTICE, "SIGINT received, shutting down\n");
+ end = 1;
+ break;
+ case SIGABRT:
+ case SIGUSR1:
+ talloc_report(tall_vty_ctx, stderr);
+ talloc_report_full(tall_ggsn_ctx, stderr);
+ break;
+ case SIGUSR2:
+ talloc_report_full(tall_vty_ctx, stderr);
+ break;
+ default:
+ break;
+ }
+}
+
+static void print_usage()
+{
+ printf("Usage: osmo-ggsn [-h] [-D] [-c configfile] [-V]\n");
+}
+
+static void print_help()
+{
+ printf( " Some useful help...\n"
+ " -h --help This help text\n"
+ " -D --daemonize Fork the process into a background daemon\n"
+ " -c --config-file filename The config file to use\n"
+ " -V --version Print the version of OsmoGGSN\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' },
+ { "daemonize", 0, 0, 'D' },
+ { "config-file", 1, 0, 'c' },
+ { "version", 0, 0, 'V' },
+ { 0, 0, 0, 0 }
+ };
+
+ c = getopt_long(argc, argv, "hdc:V", long_options, &option_index);
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'h':
+ print_usage();
+ print_help();
+ exit(0);
+ case 'D':
+ daemonize = 1;
+ break;
+ case 'c':
+ config_file = optarg;
+ break;
+ case 'V':
+ print_version(1);
+ exit(0);
+ break;
+ }
+ }
+}
+
+int main(int argc, char **argv)
+{
+ struct ggsn_ctx *ggsn;
+ int rc;
+
+ tall_ggsn_ctx = talloc_named_const(NULL, 0, "OsmoGGSN");
+ msgb_talloc_ctx_init(tall_ggsn_ctx, 0);
+ g_vty_info.tall_ctx = tall_ggsn_ctx;
+
+ /* Handle keyboard interrupt SIGINT */
+ signal(SIGINT, &signal_handler);
+ signal(SIGTERM, &signal_handler);
+ signal(SIGABRT, &signal_handler);
+ signal(SIGUSR1, &signal_handler);
+ signal(SIGUSR2, &signal_handler);
+
+ osmo_init_ignore_signals();
+ osmo_init_logging2(tall_ggsn_ctx, &log_info);
+ osmo_stats_init(tall_ggsn_ctx);
+
+ vty_init(&g_vty_info);
+ logging_vty_add_cmds();
+ osmo_talloc_vty_add_cmds();
+ osmo_stats_vty_add_cmds();
+ ggsn_vty_init();
+ ctrl_vty_init(tall_ggsn_ctx);
+
+ handle_options(argc, argv);
+
+ rate_ctr_init(tall_ggsn_ctx);
+
+ rc = vty_read_config_file(config_file, NULL);
+ if (rc < 0) {
+ fprintf(stderr, "Failed to open config file: '%s'\n", config_file);
+ exit(2);
+ }
+
+ rc = telnet_init_dynif(tall_ggsn_ctx, NULL, vty_get_bind_addr(), OSMO_VTY_PORT_GGSN);
+ if (rc < 0)
+ exit(1);
+
+ g_ctrlh = ctrl_interface_setup_dynip(NULL, ctrl_vty_get_bind_addr(),
+ OSMO_CTRL_PORT_GGSN, NULL);
+ if (!g_ctrlh) {
+ LOGP(DGGSN, LOGL_ERROR, "Failed to create CTRL interface.\n");
+ exit(1);
+ }
+
+ if (daemonize) {
+ rc = osmo_daemonize();
+ if (rc < 0) {
+ perror("Error during daemonize");
+ exit(1);
+ }
+ }
+
+#if 0
+ /* qos */
+ qos.l = 3;
+ qos.v[2] = (args_info.qos_arg) & 0xff;
+ qos.v[1] = ((args_info.qos_arg) >> 8) & 0xff;
+ qos.v[0] = ((args_info.qos_arg) >> 16) & 0xff;
+#endif
+
+ /* Main select loop */
+ while (!end) {
+ osmo_select_main(0);
+ }
+
+ llist_for_each_entry(ggsn, &g_ggsn_list, list)
+ ggsn_stop(ggsn);
+
+ return 0;
+}