Replace gethostbyname and gethostbyname with getaddrinfo for DNS domain name resolution.

Replace gethostbyname and gethostbyname with getaddrinfo for DNS domain name resolution.

Void DomainToIP (const char * host, const char * portStr, char * ip) {struct addrinfo hints, * res, * res0; char str [32] = {0 }; memset (& hints, 0, sizeof (hints); hints. ai_family = PF_UNSPEC; hints. ai_socktype = SOCK_STREAM; hints. ai_protocol = IPPROTO_TCP; hints. ai_flags = AI_PASSIVE; int ret = getaddrinfo (host, portStr, & hints, & res0); if (ret! = 0) {fprintf (stderr, "getaddrinfo: % s \ n", gai_strerror (ret )); <pre code_snippet_id = "582093" snippet_file_name = "blog_20150117_2_5030408" name = "code" class = "cpp"> return ;}for (res = res0; res; res = res-> ai_next) {if (res-> ai_family = AF_INET) {// Found IPv4 address inet_ntop (AF_INET, & (struct sockaddr_in *) (res-> ai_addr)-> sin_addr), str, 32); <span style = "font-family: Arial, Helvetica, sans-serif; "> printf </span> <span style =" font-family: Arial, Helvetica, sans-serif; "> (" Resolved IP: % s \ n ", str); </span> strncpy (ip, str, 32);} else if (res-> ai_family = AF_INET6) {// Found IPv6 address inet_ntop (AF_INET6, & (struct sockaddr_in *) (res-> ai_addr)-> sin_addr), str, 32); printf ("parsed IP6: % s \ n ", str); strncpy (ip, str, 32) ;}} freeaddrinfo (res0 );}