HP-UX IPv6 Porting Guide (September 2004)

Sample Client/Server Programs
IPv6 TCP Client using getipnodebyname()
Chapter 15 63
IPv6 TCP Client using getipnodebyname()
This code fragment is part of an example IPv6 client program that ships in the HP-UX 11i v2
/usr/lib/demos/networking/socket/af_inet6 directory, rewritten using the
getipnodebyname() function call.
struct sockaddr_in6 peeraddr_in6; /* for peer socket address */
memset ((char *)&peeraddr_in6, 0, sizeof(struct sockaddr_in6));
hp = getipnodebyname (argv[1], AF_INET6, AI_DEFAULT, &error);
if (hp == NULL) {
fprintf(stderr, "%s: %s not found in /etc/hosts\n",
argv[0], argv[1]);
exit(1);
}
peeraddr_in6.sin6_family = hp->h_addrtype;
memcpy(&peeraddr_in6.sin6_addr, hp->h_addr, hp->h_length);
/* Find the information for the "example" server
* in order to get the needed port number.
*/
sp = getservbyname ("example", "tcp");
if (sp == NULL) {
fprintf(stderr, "%s: example not found in /etc/services\n",
argv[0]);
exit(1);
}
peeraddr_in6.sin6_port = sp->s_port;
/* Create the socket. */
s = socket (AF_INET6, SOCK_STREAM, 0);
if (s == -1) {
perror(argv[0]);
fprintf(stderr, "%s: unable to create socket\n", argv[0]);
exit(1);
}
/* Try to connect to the remote server at the address
* which was just built into peeraddr.
*/
if (connect(s, &peeraddr_in6, sizeof(peeraddr_in6)) == -1) {
perror(argv[0]);
fprintf(stderr, "%s: unable to connect to remote\n", argv[0]);
exit(1);
}