IPv6 Network Programming

2.3 Guidelines to Address-Family Independent Socket Programming 17

2.3

if (hp->h_length l= sizeof(sin6.sin6 addr)) {

fprintf(stderr, "invalid address size\n");

exit(l);

/*NOTREACHED*/

}

memset(&sin6, 0, sizeof(sin6));

sin6.sin6_family = AF_INET6;

salen

= sin6.sin6 len = sizeof(struct sockaddr in6) ;

memcpy(&sin6.sin6_addr,

hp->h_addr, sizeof(sin6.sin6_addr)) ;

sin6.sin6_port = htons(80) ;

/*

connect to the peer

*/

if (connect(s, (struct sockaddr *)&sin6, salen) 0) {

perror("connect") ;

exit(l);

}

Guidelines to Address-Family Independent

Socket Programming

So, how can we make our program address-family independent? ...