socklen_t         100 kern/include/kern/socket.h 	socklen_t msg_namelen;	/* size of msg_name object, or 0 */
socklen_t         104 kern/include/kern/socket.h 	socklen_t msg_controllen; /* size of msg_control area */
socklen_t         109 kern/include/kern/socket.h 	socklen_t cmsg_len;	/* length of control data, including header */