corrige detecção de endereços

internal/config/config.go

@@ -5,16 +5,30 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/BurntSushi/toml"
 )
 
 const DefaultIntervalMinutes = 5
 
+// RecordType identifies which DNS record family an entry updates. Hurricane
+// Electric's dynamic DNS API cannot infer this from the submitted address
+// alone, so it must be configured explicitly per entry.
+type RecordType string
+
+const (
+	RecordTypeA    RecordType = "A"
+	RecordTypeAAAA RecordType = "AAAA"
+)
+
 // Entry describes a single Hurricane Electric dynamic DNS hostname to keep updated.
 type Entry struct {
 	Hostname string `toml:"hostname"`
 	Token    string `toml:"token"`
+	// RecordType selects whether this entry updates the A (IPv4) or AAAA
+	// (IPv6) record. Defaults to A when omitted.
+	RecordType RecordType `toml:"record_type"`
 }
 
 // Config is the top-level he-dydns configuration.
@@ -46,13 +60,25 @@ func Load(path string) (*Config, error) {
 	if len(cfg.Entries) == 0 {
 		return nil, fmt.Errorf("config %s: no entries defined", path)
 	}
-	for i, e := range cfg.Entries {
+	for i := range cfg.Entries {
+		e := &cfg.Entries[i]
 		if e.Hostname == "" {
 			return nil, fmt.Errorf("config %s: entries[%d] missing hostname", path, i)
 		}
 		if e.Token == "" {
 			return nil, fmt.Errorf("config %s: entries[%d] missing token", path, i)
 		}
+
+		switch RecordType(strings.ToUpper(string(e.RecordType))) {
+		case "":
+			e.RecordType = RecordTypeA
+		case RecordTypeA:
+			e.RecordType = RecordTypeA
+		case RecordTypeAAAA:
+			e.RecordType = RecordTypeAAAA
+		default:
+			return nil, fmt.Errorf("config %s: entries[%d] invalid record_type %q (must be \"A\" or \"AAAA\")", path, i, e.RecordType)
+		}
 	}
 
 	if cfg.IntervalMinutes <= 0 {