}
void bar_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
printf("bar_receive_cb %zu: ", len);
fwrite(data, 1, len, stdout);
}
void bar_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
printf("bar_receive_cb %zu: ", len);
fwrite(data, 1, len, stdout);