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DNS: Implement queryStrategy for "localhost" (#4303)

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Fixes https://github.com/XTLS/Xray-core/issues/4302
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风扇滑翔翼 2025-01-19 15:39:54 +08:00 committed by GitHub
parent 14a6636a41
commit f4fd8b8fad
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3 changed files with 13 additions and 6 deletions
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2
app/dns/nameserver.go
View File

@ -43,7 +43,7 @@ func NewServer(ctx context.Context, dest net.Destination, dispatcher routing.Dis
}
switch {
case strings.EqualFold(u.String(), "localhost"):
return NewLocalNameServer(), nil
return NewLocalNameServer(queryStrategy), nil
case strings.EqualFold(u.Scheme, "https"): // DOH Remote mode
return NewDoHNameServer(u, dispatcher, queryStrategy)
case strings.EqualFold(u.Scheme, "https+local"): // DOH Local mode

11
app/dns/nameserver_local.go
View File

@ -15,12 +15,18 @@ import (
// LocalNameServer is an wrapper over local DNS feature.
type LocalNameServer struct {
client *localdns.Client
queryStrategy QueryStrategy
}
const errEmptyResponse = "No address associated with hostname"
// QueryIP implements Server.
func (s *LocalNameServer) QueryIP(ctx context.Context, domain string, _ net.IP, option dns.IPOption, _ bool) (ips []net.IP, err error) {
option = ResolveIpOptionOverride(s.queryStrategy, option)
if !option.IPv4Enable && !option.IPv6Enable {
return nil, dns.ErrEmptyResponse
}
start := time.Now()
ips, err = s.client.LookupIP(domain, option)
@ -42,14 +48,15 @@ func (s *LocalNameServer) Name() string {
}
// NewLocalNameServer creates localdns server object for directly lookup in system DNS.
func NewLocalNameServer() *LocalNameServer {
func NewLocalNameServer(queryStrategy QueryStrategy) *LocalNameServer {
errors.LogInfo(context.Background(), "DNS: created localhost client")
return &LocalNameServer{
queryStrategy: queryStrategy,
client: localdns.New(),
}
}
// NewLocalDNSClient creates localdns client object for directly lookup in system DNS.
func NewLocalDNSClient() *Client {
return &Client{server: NewLocalNameServer()}
return &Client{server: NewLocalNameServer(QueryStrategy_USE_IP)}
}

2
app/dns/nameserver_local_test.go
View File

@ -12,7 +12,7 @@ import (
)
func TestLocalNameServer(t *testing.T) {
s := NewLocalNameServer()
s := NewLocalNameServer(QueryStrategy_USE_IP)
ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
ips, err := s.QueryIP(ctx, "google.com", net.IP{}, dns.IPOption{
IPv4Enable: true,