__SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
char sa_data[14]; /* Address data. */
struct sockaddr_in
{
__SOCKADDR_COMMON (sin_);
in_port_t sin_port; /* Port number. */
struct in_addr sin_addr; /* Internet address. */
/* Pad to size of `struct sockaddr‘. */
unsigned char sin_zero[sizeof (struct sockaddr) -__SOCKADDR_COMMON_SIZE -sizeof (in_port_t) -sizeof (struct in_addr)];
};
