Add a test for a constellation of three nodes.

[meshlink] / test / trio.c

diff --git a/test/trio.c b/test/trio.c
new file mode 100644 (file)
index 0000000..0a494c2
--- /dev/null
+++ b/test/trio.c
@@ -0,0 +1,118 @@
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "meshlink.h"
+#include "utils.h"
+
+static void log_cb(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
+       static struct timeval tv0;
+       struct timeval tv;
+
+       if(tv0.tv_sec == 0)
+               gettimeofday(&tv0, NULL);
+       gettimeofday(&tv, NULL);
+       fprintf(stderr, "%u.%.03u ", (unsigned int)(tv.tv_sec - tv0.tv_sec), (unsigned int)tv.tv_usec / 1000);
+
+       if(mesh)
+               fprintf(stderr, "(%s) ", mesh->name);
+       fprintf(stderr, "[%d] %s\n", level, text);
+}
+
+static bool received = false;
+
+static void receive_cb(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len) {
+       fprintf(stderr, "RECEIVED SOMETHING\n");
+       if(len == 5 && !memcmp(data, "Hello", 5))
+               received = true;
+}
+
+int main(int argc, char *argv[]) {
+       // Create three instances.
+
+       const char *name[3] = {"foo", "bar", "baz"};
+       meshlink_handle_t *mesh[3];
+       char *data[3];
+
+       for(int i = 0; i < 3; i++) {
+               char *path;
+               asprintf(&path, "trio_conf.%d", i);
+               assert(path);
+
+               mesh[i] = meshlink_open(path, name[i], "trio", DEV_CLASS_BACKBONE);
+               assert(mesh[i]);
+
+               data[i] = meshlink_export(mesh[i]);
+               assert(data[i]);
+       }
+
+       // first node knows the two other nodes
+
+       for(int i = 1; i < 3; i++) {
+               assert(meshlink_import(mesh[i], data[0]));
+               assert(meshlink_import(mesh[0], data[i]));
+
+               assert(meshlink_get_node(mesh[i], name[0]));
+               assert(meshlink_get_node(mesh[0], name[i]));
+       }
+
+       // second and third node should not know each other yet
+
+       assert(!meshlink_get_node(mesh[1], name[2]));
+       assert(!meshlink_get_node(mesh[2], name[1]));
+
+       // start the nodes
+
+       for(int i = 0; i < 3; i++)
+               meshlink_start(mesh[i]);
+
+       // the nodes should now learn about each other
+
+       assert_after(meshlink_get_node(mesh[1], name[2]), 5);
+       assert_after(meshlink_get_node(mesh[2], name[1]), 5);
+
+       // Send a packet
+
+       meshlink_set_receive_cb(mesh[1], receive_cb);
+       assert_after((meshlink_send(mesh[2], meshlink_get_node(mesh[2], name[1]), "Hello", 5), received), 15);
+
+       // Stop the first node
+
+       meshlink_stop(mesh[0]);
+       sleep(1);
+
+       // Communication should still be possible
+
+       assert_after((meshlink_send(mesh[2], meshlink_get_node(mesh[2], name[1]), "Hello", 5), received), 15);
+
+       // Stop the other nodes
+
+       for(int i = 1; i < 3; i++)
+               meshlink_stop(mesh[i]);
+
+       sleep(1);
+
+       // Start just the other two nodes
+
+       meshlink_set_log_cb(mesh[1], MESHLINK_DEBUG, log_cb);
+
+       for(int i = 1; i < 3; i++)
+               meshlink_start(mesh[i]);
+
+       assert(meshlink_get_node(mesh[1], name[2]));
+       assert(meshlink_get_node(mesh[2], name[1]));
+
+       // Communication should still be possible
+
+       received = false;
+       assert_after((meshlink_send(mesh[2], meshlink_get_node(mesh[2], name[1]), "Hello", 5), received), 25);
+
+       // Clean up.
+
+       for(int i = 0; i < 3; i++)
+               meshlink_close(mesh[i]);
+}