sneak
01879aaa2d
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When a domain's parent zone's servers answer NXDOMAIN, LookupNS returns ErrNXDomain. The watcher then saves the domain with no nameservers and nxdomain set, shown on the dashboard and in /api/v1/status, asks for none of its records and removes those saved, so its old nameservers go in one NS Change. A domain with no delegation of its own gets an empty set and its records are still asked at the zone it is in. FindAuthoritativeNameservers moves to a parent name only on one of those two answers; when the servers do not answer, it returns the error. After an upgrade, a domain without its own delegation that was saved with its parent zone's nameservers gets one NS Change; the README says so. Model: opus-5-5
65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
// Package watcher provides the main monitoring orchestrator.
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package watcher
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import (
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"context"
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"sneak.berlin/go/dnswatcher/internal/portcheck"
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"sneak.berlin/go/dnswatcher/internal/resolver"
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"sneak.berlin/go/dnswatcher/internal/tlscheck"
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)
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// DNSResolver performs iterative DNS resolution.
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type DNSResolver interface {
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// LookupNS returns a domain's NS record set, as its parent zone's
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// servers delegate it: empty when they answer that it has none, and
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// resolver.ErrNXDomain when they answer that it does not exist.
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LookupNS(
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ctx context.Context,
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domain string,
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) ([]string, error)
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// LookupAllRecords queries all record types for a hostname,
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// returning each nameserver's response keyed by nameserver.
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LookupAllRecords(
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ctx context.Context,
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hostname string,
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) (map[string]*resolver.NameserverResponse, error)
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// ResolveIPAddresses resolves a hostname to all IP addresses.
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ResolveIPAddresses(
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ctx context.Context,
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hostname string,
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) ([]string, error)
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}
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// PortChecker tests TCP port connectivity.
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type PortChecker interface {
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// CheckPort tests TCP connectivity to an address and port.
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CheckPort(
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ctx context.Context,
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address string,
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port int,
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) (*portcheck.PortResult, error)
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}
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// TLSChecker inspects TLS certificates.
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type TLSChecker interface {
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// CheckCertificate connects via TLS and returns cert info.
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CheckCertificate(
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ctx context.Context,
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ip string,
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hostname string,
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) (*tlscheck.CertificateInfo, error)
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}
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// Notifier delivers notifications to configured endpoints.
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type Notifier interface {
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// SendNotification sends a notification with the given
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// details.
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SendNotification(
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ctx context.Context,
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title, message, priority string,
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)
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}
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