123 lines
2.7 KiB
Go
123 lines
2.7 KiB
Go
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package app
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import (
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"context"
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"fmt"
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"time"
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"git.ext.icikowski.pl/icikowski/ip-ddns/adapter/directadmin"
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"git.ext.icikowski.pl/icikowski/ip-ddns/adapter/dnsresolver"
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"git.ext.icikowski.pl/icikowski/ip-ddns/config"
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"github.com/rs/zerolog"
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)
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type Service struct {
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da directadmin.DirectAdminClient
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resolv dnsresolver.DomainNameResolver
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srcDomain string
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srcNameserver string
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dstDomain string
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dstNameserver string
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entryDomain string
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entryName string
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entryTTL uint16
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resyncTime time.Duration
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log zerolog.Logger
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}
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func NewService(
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directadminClient directadmin.DirectAdminClient,
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dnsResolver dnsresolver.DomainNameResolver,
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domainConfig config.DomainConfig,
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resyncTime time.Duration,
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log zerolog.Logger,
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) *Service {
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return &Service{
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da: directadminClient,
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resolv: dnsResolver,
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srcDomain: domainConfig.Source.Name,
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srcNameserver: domainConfig.Source.Nameserver,
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dstDomain: domainConfig.Destination.Name,
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dstNameserver: domainConfig.Destination.Nameserver,
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entryName: domainConfig.Entry.Name,
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entryDomain: domainConfig.Entry.Domain,
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entryTTL: domainConfig.Entry.TTL,
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resyncTime: resyncTime,
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log: log,
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}
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}
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func (s *Service) update() {
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srcIPs, err := s.resolv.ResolveA(s.srcDomain, s.srcNameserver)
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if err != nil {
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s.log.Warn().Err(err).Msg("unable to get source IP address")
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return
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}
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srcIP := srcIPs[0]
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s.log.Info().IPAddr("ip", srcIP).Msg("got source IP address")
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dstIPs, err := s.resolv.ResolveA(s.dstDomain, s.dstNameserver)
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if err != nil {
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s.log.Warn().Err(err).Msg("unable to get destination IP address")
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return
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}
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dstIP := dstIPs[0]
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s.log.Info().IPAddr("ip", dstIP).Msg("got destination IP address")
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if srcIP.Equal(dstIP) {
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s.log.Info().Msg("addresses match, no update needed")
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return
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}
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s.log.Info().Msg("addresses mismatch, updating")
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params := &directadmin.DNSControlParams{
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Domain: s.entryDomain,
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Action: directadmin.DNSControlActionEdit,
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Type: directadmin.DNSControlRecordTypeA,
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Name: s.entryName,
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Value: srcIP.String(),
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TTL: &s.entryTTL,
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ARECS0: fmt.Sprintf(
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"name=%s&value=%s",
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s.entryName,
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dstIP.String(),
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),
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}
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log := s.log.With().Object("params", params).Logger()
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resp, err := s.da.DNSControl(params)
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if err != nil {
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log.Error().Err(err).Msg("unable to update domain params")
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return
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}
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log = log.With().Object("response", resp).Logger()
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if resp.Error {
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log.Error().Msg("unable to update domain params")
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return
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}
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log.Info().Msg("successfully updated domain params")
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}
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func (s *Service) Run(ctx context.Context) error {
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ticker := time.NewTicker(s.resyncTime)
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defer ticker.Stop()
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for {
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s.update()
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select {
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case <-ctx.Done():
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return nil
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case <-ticker.C:
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continue
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}
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}
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}
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