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waitfordns: resolve and check against NS' IPv6 address

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This commit is contained in:
Girish Ramakrishnan
2024-04-26 17:41:51 +02:00
parent 4e363dc77a
commit 2da361a1f2
1 changed files with 10 additions and 6 deletions
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16
src/dns/waitfordns.js
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@@ -38,20 +38,24 @@ async function isChangeSynced(hostname, type, value, nameserver) {
assert.strictEqual(typeof nameserver, 'string');
// ns records cannot have cname
const [error, nsIps] = await safe(dig.resolve(nameserver, 'A', { timeout: 5000 }));
if (error || !nsIps || nsIps.length === 0) {
debug(`isChangeSynced: cannot resolve NS ${nameserver}`); // it's fine if one or more ns are dead
const [error4, nsIPv4s] = await safe(dig.resolve(nameserver, 'A', { timeout: 5000 }));
const [error6, nsIPv6s] = await safe(dig.resolve(nameserver, 'AAAA', { timeout: 5000 }));
if (error4 && error6) {
debug(`isChangeSynced: cannot resolve NS ${nameserver}`); // NS doesn't resolve at all; it's fine
return true;
}
const nsIPs = [].concat(nsIPv4s || []).concat(nsIPv6s || []);
const status = [];
for (let i = 0; i < nsIps.length; i++) {
const nsIp = nsIps[i];
for (let i = 0; i < nsIPs.length; i++) {
const nsIp = nsIPs[i];
const resolveOptions = { server: nsIp, timeout: 5000 };
const resolver = type === 'A' || type === 'AAAA' ? resolveIp(hostname, type, resolveOptions) : dig.resolve(hostname, 'TXT', resolveOptions);
const [error, answer] = await safe(resolver);
if (error && (error.code === dns.TIMEOUT || error.code === dns.REFUSED)) {
// CONNREFUSED - when there is no ipv4/ipv6 connectivity. REFUSED - server won't answer maybe by policy
if (error && (error.code === dns.TIMEOUT || error.code === dns.REFUSED || error.code === dns.CONNREFUSED)) {
debug(`isChangeSynced: NS ${nameserver} (${nsIp}) not resolving ${hostname} (${type}): ${error}. Ignoring`);
status[i] = true; // should be ok if dns server is down
continue;