-int ipc_server_read(server_child *children, int fd);
-int ipc_child_write(int fd, uint16_t command, int len, void *token);
+extern int ipc_server_read(server_child_t *children, int fd);
+extern int ipc_child_write(int fd, uint16_t command, int len, void *token);
+extern int ipc_child_state(AFPObj *obj, uint16_t state);