Example of getaddrinfo() for Clients

• struct addrinfo hints, *res, *ai;

• int s;

• memset(&hints, 0, sizeof(hints));

• hints.ai_family = PF_UNSPEC;

• hints.ai_socktype = SOCK_STREAM;

• hints.ai_protocol = IPPROTO_TCP;

• if (gai = getaddrinfo(name, service, &hints, &res)) {

• printf("getaddrinfo failed: %s\n", gai_strerror(gai)); return -1;

• }

• for (ai = res; ai != NULL; ai = ai->ai_next) {

• s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);

• if (s < 0) continue;

• if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {

• close(s);

• s = -1;

• continue;

• }

• break;

• }

• freeaddrinfo(res);

• return s;

Notes: