Maximus-

// ./usr/include/sys/syscall.h:521:#define	SYS_sendmsg_x      481
// ./kern/syscalls.master:751:480	AUE_NULL	ALL	{ user_ssize_t recvmsg_x(int s, struct msghdr_x *msgp, u_int cnt, int flags); }
#include <sys/syscall.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>