Initial GIT import

1 files changed, 260 insertions, 0 deletions

diff --git a/src/router/main.c b/src/router/main.c
new file mode 100644
index 0000000..b3a404e
--- /dev/null
+++ b/src/router/main.c
@@ -0,0 +1,260 @@
+/* osmo-cc-router main
+ *
+ * (C) 2020 by Andreas Eversberg <jolly@eversberg.eu>
+ * 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <termios.h>
+#include "../libdebug/debug.h"
+#include "../liboptions/options.h"
+#include "../libg711/g711.h"
+#include "call.h"
+#include "audio.h"
+#include "display.h"
+
+int num_kanal = 1;
+osmo_cc_endpoint_t *cc_ep = NULL;
+
+static char *routing_script = "~/.osmocom/router/routing.sh";
+static char *routing_shell = "bash";
+#define MAX_CC_ARGS 1024
+static int cc_argc = 0;
+static const char *cc_argv[MAX_CC_ARGS];
+
+static void print_usage(const char *app)
+{
+	printf("Usage: %s [<options>]\n", app);
+}
+
+static void print_help()
+{
+	/*      -                                                                             - */
+	printf(" -h --help\n");
+	printf("        This help\n");
+	printf(" -v --verbose <level> | <level>,<category>[,<category>[,...]] | list\n");
+	printf("        Use 'list' to get a list of all levels and categories\n");
+	printf("        Verbose level: digit of debug level (default = '%d')\n", debuglevel);
+	printf("        Verbose level+category: level digit followed by one or more categories\n");
+	printf(" -r --routing-script <script>\n");
+	printf("        Define the script/executable that is executed to perform routing\n");
+	printf("        decision for each call. (default = %s)\n", routing_script);
+	printf(" -s --routing-shell <>\n");
+	printf("        Define the shell to run the routing scrip. (default = %s)\n", routing_shell);
+	printf(" -C --cc \"<osmo-cc arg>\" [--cc ...]\n");
+	printf("        Pass arguments to Osmo-CC endpoint. Use '-cc help' for description.\n");
+}
+
+#define OPT_XXX	256
+
+static void add_options(void)
+{
+	option_add('h', "help", 0);
+	option_add('v', "verbose", 1);
+	option_add('r', "routing-script", 1);
+	option_add('s', "routing-shell", 1);
+	option_add('C', "cc", 1);
+}
+
+static int handle_options(int short_option, int argi, char **argv)
+{
+	int rc;
+
+	switch (short_option) {
+	case 'h':
+		print_usage(argv[0]);
+		print_help();
+		return 0;
+	case 'v':
+		if (!strcasecmp(argv[argi], "list")) {
+	                debug_list_cat();
+			return 0;
+		}
+		rc = parse_debug_opt(argv[argi]);
+		if (rc < 0) {
+			fprintf(stderr, "Failed to parse debug option, please use -h for help.\n");
+			return rc;
+		}
+		break;
+	case 'r':
+		routing_script = strdup(argv[argi]);
+		break;
+	case 's':
+		routing_shell = strdup(argv[argi]);
+		break;
+	case 'C':
+		if (!strcasecmp(argv[argi], "help")) {
+			osmo_cc_help();
+			return 0;
+		}
+		if (cc_argc == MAX_CC_ARGS) {
+			fprintf(stderr, "Too many osmo-cc args!\n");
+			break;
+		}
+		cc_argv[cc_argc++] = strdup(argv[argi]);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 1;
+}
+
+static int quit = 0;
+void sighandler(int sigset)
+{
+	if (sigset == SIGHUP || sigset == SIGPIPE)
+		return;
+
+	fprintf(stderr, "\nSignal %d received.\n", sigset);
+
+	quit = 1;
+}
+
+static int get_char()
+{
+	struct timeval tv = {0, 0};
+	fd_set fds;
+	char c = 0;
+	int __attribute__((__unused__)) rc;
+
+	FD_ZERO(&fds);
+	FD_SET(0, &fds);
+	select(0+1, &fds, NULL, NULL, &tv);
+	if (FD_ISSET(0, &fds)) {
+		rc = read(0, &c, 1);
+		return c;
+	} else
+		return -1;
+}
+
+int main(int argc, char *argv[])
+{
+	double last_time_call = 0, now;
+	int argi, rc;
+	struct termios term, term_orig;
+	int c;
+
+	/* init FM */
+	fm_init(0);
+
+	/* init codecs (for recording) */
+	g711_init();
+
+        /* handle options / config file */
+	add_options();
+	rc = options_config_file("~/.osmocom/router/router.conf", handle_options);
+	if (rc < 0)
+		return 0;
+	argi = options_command_line(argc, argv, handle_options);
+	if (argi <= 0)
+		return argi;
+
+	/* init osmo-cc endpoint */
+	cc_ep = calloc(1, sizeof(*cc_ep));
+	if (!cc_ep)
+		goto error;
+	rc = osmo_cc_new(cc_ep, OSMO_CC_VERSION, NULL, OSMO_CC_LOCATION_PRIV_SERV_LOC_USER, cc_message, NULL, NULL, cc_argc, cc_argv);
+	if (rc < 0)
+		goto error;
+
+	/* init call handling */
+	call_init(cc_ep, routing_script, routing_shell);
+
+	/* prepare terminal */
+	tcgetattr(0, &term_orig);
+	term = term_orig;
+	term.c_lflag &= ~(ISIG|ICANON|ECHO);
+	term.c_cc[VMIN]=1;
+	term.c_cc[VTIME]=2;
+	tcsetattr(0, TCSANOW, &term);
+
+	/* catch signals */
+	signal(SIGINT, sighandler);
+	signal(SIGHUP, sighandler);
+	signal(SIGTERM, sighandler);
+	signal(SIGPIPE, sighandler);
+
+	printf("\nRouter is ready to process calls.\n\n");
+
+	while (!quit) {
+		int w;
+
+                /* send clock calls to play/record audio files */
+		now = get_time();
+		if (now - last_time_call >= 0.1)
+			last_time_call = now;
+		if (now - last_time_call >= 0.020) {
+			last_time_call += 0.020;
+			/* call clock every 20ms */
+			call_clock(160);
+		}
+
+		process_timer();
+		call_media_handle();
+		do {
+			w = 0;
+			w |= osmo_cc_handle();
+			w |= call_handle();
+		} while (w);
+		usleep(1000);
+
+		/* process keyboard input */
+next_char:
+		c = get_char();
+		switch (c) {
+		case 3:
+			printf("CTRL+c received, quitting!\n");
+			quit = 1;
+			goto next_char;
+		case 'c':
+			display_status_on(-1);
+			goto next_char;
+		}
+	}
+
+	/* reset signals */
+	signal(SIGINT, SIG_DFL);
+	signal(SIGTSTP, SIG_DFL);
+	signal(SIGHUP, SIG_DFL);
+	signal(SIGTERM, SIG_DFL);
+	signal(SIGPIPE, SIG_DFL);
+
+	/* reset terminal */
+	tcsetattr(0, TCSANOW, &term_orig);
+
+
+error:
+	if (cc_ep) {
+		/* exit call handling */
+		call_exit();
+
+		/* exit osmo-cc endpoint */
+		osmo_cc_delete(cc_ep);
+		free(cc_ep);
+	}
+
+	/* exit FM */
+	fm_exit();
+
+	return 0;
+}
+