ডাউনলোড

`dns` মডিউল

OS resolver দিয়ে DNS lookup। Async (callbacks), IP-literal detection হেল্পারসহ।

import "dns" as dns;

dns.lookup("example.com", 0, function (err, ip, family) {
    if (err != null) { print("lookup failed:", err); return; }
    print("got:", ip, "family", family);
});

Lookups

ফাংশন	বর্ণনা
`dns.lookup(host, family, cb)`	`cb(err, ip, family)` — প্রথম address। `family`: 0/4/6।
`dns.lookup_all(host, family, cb)`	`cb(err, [{address, family}, …])` — সব address।
`dns.reverse(ip, cb)`	`cb(err, hostname)`। PTR না থাকলে IP literal-এ fallback।

হেল্পার

ফাংশন	বর্ণনা
`dns.is_ipv4(s)` → bool
`dns.is_ipv6(s)` → bool
`dns.is_ip(s)` → bool	`is_ipv4 or is_ipv6`।
`dns.lookup_or_self(host, cb)`	IP literal হলে সরাসরি ফেরত, না হলে resolve।

আরও দেখুন

net।