#include <stdio.h>
#include <netinet/in.h>

void output_sa(struct sockaddr_in *sa)
{
    printf("sin_len is %d\n", sa->sin_len);
    printf("sin_family is %d\n", sa->sin_family);
    printf("sin_port is %d\n", sa->sin_port);
    printf("sin_addr is %d\n", sa->sin_addr.s_addr);
    printf("sizeof is %lu\n", sizeof(sa));
}