--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pcm-br/main.c	Wed Aug 28 05:00:38 2024 +0000
@@ -0,0 +1,87 @@
+/*
+ * This C module is the main for itt-pcm-br, a program in the icE1 TRAU tester
+ * suite that bridges two different timeslots (two TRAU channels) on the A i/f.
+ *
+ * This code is based on osmo-e1d-pipe,
+ * (C) 2020-2022 by Harald Welte <laforge@osmocom.org>,
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/application.h>
+#include <osmocom/e1d/proto_clnt.h>
+
+#include "../libutil/open_ts.h"
+#include "../libutil/stdin_handler.h"
+#include "globals.h"
+
+struct osmo_e1dp_client *g_client;
+int tsa_fd, tsb_fd;
+
+static const char *e1d_socket_path = E1DP_DEFAULT_SOCKET;
+static const char *timeslot_spec_a, *timeslot_spec_b;
+static void *g_ctx;
+static struct osmo_fd tsa_ofd, tsb_ofd, stdin_ofd;
+
+static void process_cmdline(int argc, char **argv)
+{
+	extern int optind;
+	extern char *optarg;
+	int c;
+
+	while ((c = getopt(argc, argv, "p:")) != EOF) {
+		switch (c) {
+		case 'p':
+			e1d_socket_path = optarg;
+			continue;
+		default:
+		usage:
+			fprintf(stderr,
+			"usage: %s [-p socket] intf:line:ts intf:line:ts\n",
+				argv[0]);
+			exit(1);
+		}
+	}
+	if (argc != optind + 2)
+		goto usage;
+	timeslot_spec_a = argv[optind];
+	timeslot_spec_b = argv[optind+1];
+}
+
+int main(int argc, char **argv)
+{
+	process_cmdline(argc, argv);
+	g_ctx = talloc_named_const(NULL, 0, "g_ctx");
+	OSMO_ASSERT(g_ctx);
+	osmo_init_logging2(g_ctx, NULL);
+
+	g_client = osmo_e1dp_client_create(g_ctx, e1d_socket_path);
+	if (!g_client) {
+		fprintf(stderr, "error: cannot connect to osmo-e1d at %s\n",
+			e1d_socket_path);
+		exit(1);
+	}
+	tsa_fd = open_e1d_ts(g_client, timeslot_spec_a);
+	tsb_fd = open_e1d_ts(g_client, timeslot_spec_b);
+
+	osmo_fd_setup(&tsa_ofd, tsa_fd, OSMO_FD_READ, tsa_fd_cb, NULL, 0);
+	OSMO_ASSERT(osmo_fd_register(&tsa_ofd) == 0);
+
+	osmo_fd_setup(&tsb_ofd, tsb_fd, OSMO_FD_READ, tsb_fd_cb, NULL, 0);
+	OSMO_ASSERT(osmo_fd_register(&tsb_ofd) == 0);
+
+	osmo_fd_setup(&stdin_ofd, 0, OSMO_FD_READ, stdin_select_cb,
+			handle_user_cmd, 0);
+	OSMO_ASSERT(osmo_fd_register(&stdin_ofd) == 0);
+
+	while (1) {
+		osmo_select_main(0);
+	}
+}