46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package checker
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import (
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"context"
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"fmt"
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sdk "git.happydns.org/checker-sdk-go/checker"
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)
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// Rule returns the alias check rule.
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func Rule() sdk.CheckRule {
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return &aliasRule{}
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}
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type aliasRule struct{}
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func (r *aliasRule) Name() string { return "alias_check" }
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func (r *aliasRule) Description() string {
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return "Verifies a CNAME / DNAME / ALIAS chain: coexistence, loops, length, target resolvability, DNSSEC coverage."
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}
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func (r *aliasRule) ValidateOptions(opts sdk.CheckerOptions) error {
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if v, ok := opts["maxChainLength"]; ok {
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f, ok := v.(float64)
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if !ok {
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return fmt.Errorf("maxChainLength must be a number")
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}
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if f < 1 {
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return fmt.Errorf("maxChainLength must be >= 1")
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}
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}
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return nil
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}
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func (r *aliasRule) Evaluate(ctx context.Context, obs sdk.ObservationGetter, opts sdk.CheckerOptions) []sdk.CheckState {
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var data AliasData
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if err := obs.Get(ctx, ObservationKeyAlias, &data); err != nil {
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return []sdk.CheckState{{
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Status: sdk.StatusError,
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Message: fmt.Sprintf("failed to get alias data: %v", err),
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Code: "alias_error",
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}}
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}
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return Evaluate(&data)
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}
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