Ask Bjørn Hansen
1f2f39f40c
Generate RFC 9432 DNS catalog zone files from a declarative input file. Parses zone-to-catalog assignments with optional group and coo properties, produces deterministic BIND-format output with automatic SOA serial management and change detection.
79 lines
1.7 KiB
Go
79 lines
1.7 KiB
Go
package main
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import (
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"fmt"
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"os"
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"strings"
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"gopkg.in/yaml.v3"
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)
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// CatalogConfig holds the configuration for a single catalog zone.
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type CatalogConfig struct {
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Zone string `yaml:"zone"`
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}
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// SOAConfig holds the configurable SOA fields.
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type SOAConfig struct {
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Mname string `yaml:"mname"`
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Rname string `yaml:"rname"`
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}
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// Config holds the parsed catz.yaml configuration.
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type Config struct {
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Catalogs map[string]CatalogConfig `yaml:"catalogs"`
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SOA SOAConfig `yaml:"soa"`
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}
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func loadConfig(path string) (*Config, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return nil, fmt.Errorf("reading config: %w", err)
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}
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var cfg Config
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if err := yaml.Unmarshal(data, &cfg); err != nil {
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return nil, fmt.Errorf("parsing config: %w", err)
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}
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if err := validateConfig(&cfg); err != nil {
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return nil, err
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}
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// Normalize zone FQDNs
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for name, cat := range cfg.Catalogs {
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cat.Zone = normalizeFQDN(cat.Zone)
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cfg.Catalogs[name] = cat
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}
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cfg.SOA.Mname = normalizeFQDN(cfg.SOA.Mname)
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cfg.SOA.Rname = normalizeFQDN(cfg.SOA.Rname)
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return &cfg, nil
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}
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func validateConfig(cfg *Config) error {
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if len(cfg.Catalogs) == 0 {
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return fmt.Errorf("config: no catalogs defined")
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}
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for name, cat := range cfg.Catalogs {
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if cat.Zone == "" {
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return fmt.Errorf("config: catalog %q has no zone defined", name)
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}
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}
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if cfg.SOA.Mname == "" {
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return fmt.Errorf("config: soa.mname is required")
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}
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if cfg.SOA.Rname == "" {
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return fmt.Errorf("config: soa.rname is required")
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}
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return nil
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}
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func normalizeFQDN(name string) string {
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name = strings.ToLower(strings.TrimSpace(name))
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if name != "" && !strings.HasSuffix(name, ".") {
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name += "."
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}
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return name
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}
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