clawbot
661ef8d937
check / check (push) Canceled after 0s
Looking up a nameserver's own address followed only the addresses a referral gave, so a nameserver whose zone is delegated without them, such as a.ntpns.org of pool.ntp.org, never resolved. The walk to a name's nameservers looked addresses up only when a referral gave none. Both now ask the nameservers whose addresses the referral gives first and, if none of them gives a usable reply, look up and ask the others; with no addresses given, all are looked up, as before. maxLookupDepth stops lookups three deep, so delegations that point at each other still end. g.ntpns.org's address needs all three when anyns.pch.net gives the referral to g.ntpns.org without addresses. Model: opus-5-5
97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
package resolver
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import (
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"context"
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"github.com/miekg/dns"
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)
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// ExtractRecordValue exports extractRecordValue for testing.
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func ExtractRecordValue(rr dns.RR) string {
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return extractRecordValue(rr)
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}
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// CollectAnswerRecords exports collectAnswerRecords for testing.
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func CollectAnswerRecords(msg *dns.Msg, resp *NameserverResponse) {
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var state queryState
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collectAnswerRecords(msg, resp, &state)
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}
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// UsableReply exports usableReply for testing.
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func UsableReply(resp *dns.Msg, zone string, name string) bool {
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return usableReply(resp, zone, name)
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}
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// NSSetFrom exports nsSetFrom for testing.
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func NSSetFrom(resp *dns.Msg, domain string) []string {
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return nsSetFrom(resp, domain)
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}
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// CollectIPs exports collectIPs for testing.
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func CollectIPs(
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results map[string]*NameserverResponse,
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) ([]string, string, error) {
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return collectIPs(results)
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}
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// QueryServers exports queryServers for testing.
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func (r *Resolver) QueryServers(
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ctx context.Context,
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servers []string,
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zone string,
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name string,
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qtype uint16,
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) (*dns.Msg, error) {
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return r.queryServers(ctx, servers, zone, name, qtype)
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}
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// QueryEachNS exports queryEachNS for testing.
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func (r *Resolver) QueryEachNS(
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ctx context.Context,
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nameservers []string,
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hostname string,
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) (map[string]*NameserverResponse, error) {
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return r.queryEachNS(ctx, nameservers, hostname, recordTypes())
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}
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// ResolveNSIPs exports resolveNSIPs for testing, looking each name up
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// as a lookup that no other lookup started.
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func (r *Resolver) ResolveNSIPs(
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ctx context.Context,
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nsNames []string,
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) []string {
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return r.resolveNSIPs(ctx, nsNames, 1)
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}
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// MaxLookupDepth exports maxLookupDepth for testing.
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const MaxLookupDepth = maxLookupDepth
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// QueryNameservers exports queryNameservers for testing.
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func (r *Resolver) QueryNameservers(
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ctx context.Context,
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given []string,
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withoutAddresses []string,
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zone string,
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name string,
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qtype uint16,
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depth int,
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) (*dns.Msg, error) {
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return r.queryNameservers(
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ctx, given, withoutAddresses, zone, name, qtype, depth,
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)
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}
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// RootServerList exports rootServerList for testing.
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func RootServerList() []string {
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return rootServerList()
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}
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// Shuffled exports shuffled for testing.
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func Shuffled(
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servers []string,
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shuffle func(n int, swap func(i, j int)),
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) []string {
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return shuffled(servers, shuffle)
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}
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