sneak
6e3795fde1
check / check (push) Failing after 2m9s
ResolveIPAddresses now returns an error, not no addresses, when no nameserver of the name's zone answered. A nameserver with status timeout or error is not an answer; one answer, even NXDOMAIN, is enough for an empty result without an error. When every server of a zone fails, FindAuthoritativeNameservers moves on to the parent name, whose servers only refer the query onward. Such a referral now has status error, so it is no answer either, and a hostname's saved records show it as error. The only caller, the nameserver address lookup, already keeps the previous addresses on an error; its comment no longer says the resolver hides this case. Model: opus-5-5
28 lines
804 B
Go
28 lines
804 B
Go
package resolver
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import "errors"
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// Sentinel errors returned by the resolver.
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var (
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// ErrNoNameservers is returned when no authoritative NS
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// could be discovered for a domain.
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ErrNoNameservers = errors.New(
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"no authoritative nameservers found",
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)
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// ErrNoNameserverAnswered is returned when every nameserver
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// asked about a name timed out, failed or returned a referral,
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// so whether the name has addresses is unknown.
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ErrNoNameserverAnswered = errors.New("no nameserver answered")
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// ErrCNAMEDepthExceeded is returned when a CNAME chain
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// exceeds MaxCNAMEDepth.
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ErrCNAMEDepthExceeded = errors.New(
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"CNAME chain depth exceeded",
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)
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// ErrContextCanceled wraps context cancellation for the
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// resolver's iterative queries.
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ErrContextCanceled = errors.New("context canceled")
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)
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