如何从iOS上的给定主机名获取IP?
我已经尝试了谷歌,但一无所获。
答案 0 :(得分:8)
以下代码适用于IPv4和IPv6。它使用getaddrinfo()
来
检索主机的IP地址列表,并转换getnameinfo()
将每个IP地址转换为字符串。 (为简洁起见,省略了错误检查。)
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC; // PF_INET if you want only IPv4 addresses
hints.ai_protocol = IPPROTO_TCP;
struct addrinfo *addrs, *addr;
getaddrinfo("www.google.com", NULL, &hints, &addrs);
for (addr = addrs; addr; addr = addr->ai_next) {
char host[NI_MAXHOST];
getnameinfo(addr->ai_addr, addr->ai_addrlen, host, sizeof(host), NULL, 0, NI_NUMERICHOST);
printf("%s\n", host);
}
freeaddrinfo(addrs);