--- /dev/null
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "meshlink.h"
+
+volatile bool bar_reachable = false;
+volatile bool bar_responded = false;
+
+void status_cb(meshlink_handle_t *mesh, meshlink_node_t *node, bool reachable) {
+ if(!strcmp(node->name, "bar"))
+ bar_reachable = reachable;
+}
+
+void foo_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+ if(len == 5 && !memcmp(data, "Hello", 5))
+ bar_responded = true;
+}
+
+void bar_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+ // Echo the data back.
+ meshlink_channel_send(mesh, channel, data, len);
+}
+
+bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_node_t *node, uint16_t port, const void *data, size_t len) {
+ if(port != 7)
+ return false;
+ meshlink_set_channel_receive_cb(mesh, channel, bar_receive_cb);
+ if(data)
+ bar_receive_cb(mesh, channel, data, len);
+ return true;
+}
+
+int main(int argc, char *argv[]) {
+ // Open two new meshlink instance.
+
+ meshlink_handle_t *mesh1 = meshlink_open("channels_conf.1", "foo");
+ if(!mesh1) {
+ fprintf(stderr, "Could not initialize configuration for foo\n");
+ return 1;
+ }
+
+ meshlink_handle_t *mesh2 = meshlink_open("channels_conf.2", "bar");
+ if(!mesh2) {
+ fprintf(stderr, "Could not initialize configuration for bar\n");
+ return 1;
+ }
+
+ // Import and export both side's data
+
+ meshlink_add_address(mesh1, "localhost");
+ meshlink_add_address(mesh2, "localhost");
+
+ char *data = meshlink_export(mesh1);
+ if(!data) {
+ fprintf(stderr, "Foo could not export its configuration\n");
+ return 1;
+ }
+
+ if(!meshlink_import(mesh2, data)) {
+ fprintf(stderr, "Bar could not import foo's configuration\n");
+ return 1;
+ }
+
+ free(data);
+
+ data = meshlink_export(mesh2);
+ if(!data) {
+ fprintf(stderr, "Bar could not export its configuration\n");
+ return 1;
+ }
+
+
+ if(!meshlink_import(mesh1, data)) {
+ fprintf(stderr, "Foo could not import bar's configuration\n");
+ return 1;
+ }
+
+ free(data);
+
+ // Set the channel accept callback on bar.
+
+ meshlink_set_channel_accept_cb(mesh2, accept_cb);
+
+ // Start both instances
+
+ meshlink_set_node_status_cb(mesh1, status_cb);
+
+ if(!meshlink_start(mesh1)) {
+ fprintf(stderr, "Foo could not start\n");
+ return 1;
+ }
+
+ if(!meshlink_start(mesh2)) {
+ fprintf(stderr, "Bar could not start\n");
+ return 1;
+ }
+
+ // Wait for the two to connect.
+
+ for(int i = 0; i < 20; i++) {
+ sleep(1);
+ if(bar_reachable)
+ break;
+ }
+
+ if(!bar_reachable) {
+ fprintf(stderr, "Bar not reachable for foo after 20 seconds\n");
+ return 1;
+ }
+
+ // Open a channel from foo to bar.
+
+ meshlink_node_t *bar = meshlink_get_node(mesh1, "bar");
+ if(!bar) {
+ fprintf(stderr, "Foo could not find bar\n");
+ return 1;
+ }
+
+ meshlink_channel_t *channel = meshlink_channel_open(mesh1, bar, 7, foo_receive_cb, "Hello", 5);
+
+ for(int i = 0; i < 5; i++) {
+ sleep(1);
+ if(bar_responded)
+ break;
+ }
+
+ if(!bar_responded) {
+ fprintf(stderr, "Bar did not respond to foo's channel message\n");
+ return 1;
+ }
+
+ meshlink_channel_close(mesh1, channel);
+
+ // Clean up.
+
+ meshlink_stop(mesh2);
+ meshlink_stop(mesh1);
+ meshlink_close(mesh2);
+ meshlink_close(mesh1);
+
+ return 0;
+}