extern void broadcast_meta(struct meshlink_handle *mesh, struct connection_t *, const char *, int);
extern void broadcast_submesh_meta(struct meshlink_handle *mesh, connection_t *from, submesh_t *s,
const char *buffer, int length);
extern void broadcast_meta(struct meshlink_handle *mesh, struct connection_t *, const char *, int);
extern void broadcast_submesh_meta(struct meshlink_handle *mesh, connection_t *from, submesh_t *s,
const char *buffer, int length);