extern bool send_meta_sptps(void *handle, uint8_t type, const void *data, size_t length);
extern bool receive_meta_sptps(void *handle, uint8_t type, const void *data, uint16_t length);
extern void broadcast_meta(struct connection_t *from, const char *buffer, size_t length);
extern bool send_meta_sptps(void *handle, uint8_t type, const void *data, size_t length);
extern bool receive_meta_sptps(void *handle, uint8_t type, const void *data, uint16_t length);
extern void broadcast_meta(struct connection_t *from, const char *buffer, size_t length);