64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
// Package updater runs one dynamic DNS update pass across all configured entries.
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package updater
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import (
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"fmt"
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"log"
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"net"
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"git.aehoo.net/alphard/he-dydns/internal/config"
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"git.aehoo.net/alphard/he-dydns/internal/hedns"
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"git.aehoo.net/alphard/he-dydns/internal/network"
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)
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// Run discovers the current address(es) and updates every configured entry.
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// It returns an error only when address discovery itself fails outright;
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// per-entry update failures are logged and aggregated but do not stop other
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// entries from being attempted.
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func Run(cfg *config.Config) error {
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addrs, err := network.Discover(cfg.Interface)
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if err != nil {
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return fmt.Errorf("discovering address: %w", err)
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}
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if addrs.Empty() {
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log.Printf("no address found (interface=%q); skipping update", cfg.Interface)
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return nil
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}
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if addrs.IPv4 != nil {
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log.Printf("discovered IPv4 address %s", addrs.IPv4)
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}
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if addrs.IPv6 != nil {
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log.Printf("discovered IPv6 address %s", addrs.IPv6)
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}
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var failures int
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for _, entry := range cfg.Entries {
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var ip net.IP
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switch entry.RecordType {
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case config.RecordTypeAAAA:
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ip = addrs.IPv6
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default:
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ip = addrs.IPv4
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}
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if ip == nil {
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log.Printf("no %s address available for %s; skipping", entry.RecordType, entry.Hostname)
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continue
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}
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if err := hedns.Update(entry.Hostname, entry.Token, ip); err != nil {
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log.Printf("error: %v", err)
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failures++
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} else {
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log.Printf("updated %s (%s) -> %s", entry.Hostname, entry.RecordType, ip)
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}
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}
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if failures > 0 {
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return fmt.Errorf("%d update(s) failed", failures)
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}
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return nil
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}
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