87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
package checker
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import (
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"time"
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sdk "git.happydns.org/checker-sdk-go/checker"
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)
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// Version is the checker version reported in CheckerDefinition.Version.
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var Version = "built-in"
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// Definition returns the CheckerDefinition for the PTR checker.
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func (p *ptrProvider) Definition() *sdk.CheckerDefinition {
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def := &sdk.CheckerDefinition{
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ID: "ptr",
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Name: "PTR / Reverse DNS",
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Version: Version,
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Availability: sdk.CheckerAvailability{
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ApplyToService: true,
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LimitToServices: []string{"svcs.PTR"},
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},
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ObservationKeys: []sdk.ObservationKey{ObservationKeyPTR},
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Options: sdk.CheckerOptionsDocumentation{
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UserOpts: []sdk.CheckerOptionDocumentation{
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{
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Id: "requireForwardMatch",
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Type: "bool",
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Label: "Require forward-confirmed reverse DNS (FCrDNS)",
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Description: "When enabled, a PTR whose target does not resolve back to the original IP is reported as critical (otherwise as warning). Mail servers and many SSH setups require FCrDNS.",
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Default: true,
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},
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{
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Id: "allowMultiplePTR",
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Type: "bool",
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Label: "Allow multiple PTR records on the same IP",
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Description: "When disabled, more than one PTR at the same owner name is reported as warning (RFC 1912 §2.1 recommends a single PTR per IP).",
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Default: false,
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},
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{
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Id: "minTTL",
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Type: "uint",
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Label: "Minimum PTR TTL (seconds)",
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Description: "PTR records with a TTL below this threshold are flagged as warning. Very short TTLs degrade resolver cache efficiency.",
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Default: float64(300),
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},
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{
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Id: "flagGenericPTR",
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Type: "bool",
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Label: "Flag generic-looking PTR hostnames",
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Description: "When enabled, PTR targets that embed the dotted IP or match common ISP auto-generated patterns are reported as warning.",
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Default: true,
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},
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},
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ServiceOpts: []sdk.CheckerOptionDocumentation{
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{
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Id: "service_type",
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Label: "Service type",
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AutoFill: sdk.AutoFillServiceType,
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},
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{
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Id: "service",
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Label: "Service",
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AutoFill: sdk.AutoFillService,
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},
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{
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Id: "domain_name",
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Label: "Reverse zone",
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AutoFill: sdk.AutoFillDomainName,
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},
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{
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Id: "subdomain",
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Label: "PTR record",
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AutoFill: sdk.AutoFillSubdomain,
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},
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},
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},
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Rules: Rules(),
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HasHTMLReport: true,
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Interval: &sdk.CheckIntervalSpec{
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Min: 5 * time.Minute,
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Max: 24 * time.Hour,
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Default: 1 * time.Hour,
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},
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}
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def.BuildRulesInfo()
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return def
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}
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