clawbot
d0ac850407
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 go through queryZone, which asks the nameservers whose addresses the referral gives first and, if none of them gives a usable reply, looks up and asks the others. maxLookupDepth stops lookups three deep, so delegations that point at each other still end; when the limit is why no address was found, the error is ErrLookupDepthExceeded, not "no address". Model: opus-5-5
99 lines
2.3 KiB
Go
99 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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ips, _ := r.resolveNSIPs(ctx, nsNames, 1)
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return ips
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}
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// MaxLookupDepth exports maxLookupDepth for testing.
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const MaxLookupDepth = maxLookupDepth
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// QueryZone exports queryZone for testing.
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func (r *Resolver) QueryZone(
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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.queryZone(
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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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