mhdr              385 sys/socket.h   #define	CMSG_NXTHDR(mhdr, cmsg)	\
mhdr              388 sys/socket.h   	    ((caddr_t)(mhdr)->msg_control) + (mhdr)->msg_controllen) ? \
mhdr              396 sys/socket.h   #define	CMSG_FIRSTHDR(mhdr) \
mhdr              397 sys/socket.h   	((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
mhdr              398 sys/socket.h   	 (struct cmsghdr *)(mhdr)->msg_control : \