+int pb_protocol_serialise_boot_status(const struct boot_status *status,
+ char *buf, int buf_len);
+int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
+ char *buf, int buf_len);
+int pb_protocol_serialise_config(const struct config *config,
+ char *buf, int buf_len);
+int pb_protocol_serialise_url(const char *url, char *buf, int buf_len);