51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package env
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import (
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"fmt"
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"net/netip"
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"github.com/qdm12/gluetun/internal/configuration/settings"
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)
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func (s *Source) readDNS() (dns settings.DNS, err error) {
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dns.ServerAddress, err = s.readDNSServerAddress()
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if err != nil {
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return dns, err
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}
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dns.KeepNameserver, err = envToBoolPtr("DNS_KEEP_NAMESERVER")
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if err != nil {
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return dns, fmt.Errorf("environment variable DNS_KEEP_NAMESERVER: %w", err)
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}
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dns.DoT, err = s.readDoT()
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if err != nil {
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return dns, fmt.Errorf("DoT settings: %w", err)
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}
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return dns, nil
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}
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func (s *Source) readDNSServerAddress() (address netip.Addr, err error) {
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key, value := s.getEnvWithRetro("DNS_ADDRESS", "DNS_PLAINTEXT_ADDRESS")
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if value == "" {
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return address, nil
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}
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address, err = netip.ParseAddr(value)
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if err != nil {
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return address, fmt.Errorf("environment variable %s: %w", key, err)
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}
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// TODO remove in v4
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if address.Unmap().Compare(netip.AddrFrom4([4]byte{127, 0, 0, 1})) != 0 {
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s.warner.Warn(key + " is set to " + value +
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" so the DNS over TLS (DoT) server will not be used." +
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" The default value changed to 127.0.0.1 so it uses the internal DoT serves." +
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" If the DoT server fails to start, the IPv4 address of the first plaintext DNS server" +
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" corresponding to the first DoT provider chosen is used.")
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}
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return address, nil
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}
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