+} __attribute__((__packed__)) meshlink_packethdr_t;
+
+void meshlink_send_from_queue(event_loop_t *loop, void *mesh);
+void update_node_status(meshlink_handle_t *mesh, struct node_t *n);
+void update_node_pmtu(meshlink_handle_t *mesh, struct node_t *n);
+extern meshlink_log_level_t global_log_level;
+extern meshlink_log_cb_t global_log_cb;
+void handle_duplicate_node(meshlink_handle_t *mesh, struct node_t *n);
+void handle_network_change(meshlink_handle_t *mesh, bool online);
+void call_error_cb(meshlink_handle_t *mesh, meshlink_errno_t meshlink_errno);
+
+/// Per-instance PRNG
+static inline int prng(meshlink_handle_t *mesh, uint64_t max) {
+ return xoshiro(mesh->prng_state) % max;
+}
+
+/// Fudge value of ~0.1 seconds, in microseconds.
+static const unsigned int TIMER_FUDGE = 0x8000000;