#include <endian.h>

struct msghdr {
  void* msg_name;
  socklen_t msg_namelen;
  struct iovec* msg_iov;
#if __BYTE_ORDER == __BIG_ENDIAN
  int __pad1, msg_iovlen;
#else
  int msg_iovlen, __pad1;
#endif
  void* msg_control;
#if __BYTE_ORDER == __BIG_ENDIAN
  int __pad2;
  socklen_t msg_controllen;
#else
  socklen_t msg_controllen;
  int __pad2;
#endif
  int msg_flags;
};

struct cmsghdr {
#if __BYTE_ORDER == __BIG_ENDIAN
  int __pad1;
  socklen_t cmsg_len;
#else
  socklen_t cmsg_len;
  int __pad1;
#endif
  int cmsg_level;
  int cmsg_type;
};