examples/stream-*: Add options, to set local/remote peer

This helps to test connections via a network and failing connections.

The client may add "-r <peer>" to the command line, to set the address
of the remote peer.

The server may add "-l <peer>" to the command line, to select address
of local peer.

By default "127.0.0.1" is used.

Change-Id: Ie6da55ef248436e521c5d8f21f8053356c46a114
---
M examples/stream-client.c
M examples/stream-server.c
2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/examples/stream-client.c b/examples/stream-client.c
index e42748f..535804e 100644
--- a/examples/stream-client.c
+++ b/examples/stream-client.c
@@ -94,15 +94,19 @@
 {
 	struct osmo_fd *kbd_ofd;
 	bool use_sctp = false;
+	const char *use_remote_addr = "127.0.0.1";
 	int opt, rc;
 
-	while ((opt = getopt(argc, argv, "s")) != -1) {
+	while ((opt = getopt(argc, argv, "sr:")) != -1) {
 		switch (opt) {
 		case 's':
 			use_sctp = true;
 			break;
-		default:
+		case 'r':
+			use_remote_addr = optarg;
 			break;
+		default:
+			exit(0);
 		}
 	}
 
@@ -121,11 +125,10 @@
 		exit(EXIT_FAILURE);
 	}
 	osmo_stream_cli_set_name(conn, "stream_client");
-	osmo_stream_cli_set_addr(conn, "127.0.0.1");
+	osmo_stream_cli_set_addr(conn, use_remote_addr);
 	osmo_stream_cli_set_port(conn, 10000);
 	if (use_sctp)
 		osmo_stream_cli_set_proto(conn, IPPROTO_SCTP);
-
 	osmo_stream_cli_set_connect_cb(conn, connect_cb);
 	osmo_stream_cli_set_disconnect_cb(conn, disconnect_cb);
 	osmo_stream_cli_set_read_cb2(conn, read_cb);
diff --git a/examples/stream-server.c b/examples/stream-server.c
index 9faf307..bfbde6d 100644
--- a/examples/stream-server.c
+++ b/examples/stream-server.c
@@ -121,15 +121,19 @@
 {
 	struct osmo_fd *kbd_ofd;
 	bool use_sctp = false;
+	const char *use_local_addr = "127.0.0.1";
 	int opt;
 
-	while ((opt = getopt(argc, argv, "s")) != -1) {
+	while ((opt = getopt(argc, argv, "sl:")) != -1) {
 		switch (opt) {
 		case 's':
 			use_sctp = true;
 			break;
-		default:
+		case 'l':
+			use_local_addr = optarg;
 			break;
+		default:
+			exit(0);
 		}
 	}
 
@@ -147,7 +151,7 @@
 		fprintf(stderr, "cannot create server link\n");
 		exit(EXIT_FAILURE);
 	}
-	osmo_stream_srv_link_set_addr(srv, "127.0.0.1");
+	osmo_stream_srv_link_set_addr(srv, use_local_addr);
 	osmo_stream_srv_link_set_port(srv, 10000);
 	if (use_sctp)
 		osmo_stream_srv_link_set_proto(srv, IPPROTO_SCTP);

