mirror of https://github.com/XTLS/Xray-core.git
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
package dns
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import (
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"context"
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"strings"
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"time"
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"github.com/xtls/xray-core/common/log"
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"github.com/xtls/xray-core/common/net"
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"github.com/xtls/xray-core/features/dns"
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"github.com/xtls/xray-core/features/dns/localdns"
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)
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// LocalNameServer is an wrapper over local DNS feature.
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type LocalNameServer struct {
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client *localdns.Client
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}
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const errEmptyResponse = "No address associated with hostname"
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// QueryIP implements Server.
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func (s *LocalNameServer) QueryIP(_ context.Context, domain string, _ net.IP, option dns.IPOption, _ bool) (ips []net.IP, err error) {
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start := time.Now()
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ips, err = s.client.LookupIP(domain, option)
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if err != nil && strings.HasSuffix(err.Error(), errEmptyResponse) {
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err = dns.ErrEmptyResponse
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}
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if len(ips) > 0 {
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newError("Localhost got answer: ", domain, " -> ", ips).AtInfo().WriteToLog()
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log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
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}
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return
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}
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// Name implements Server.
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func (s *LocalNameServer) Name() string {
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return "localhost"
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}
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// NewLocalNameServer creates localdns server object for directly lookup in system DNS.
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func NewLocalNameServer() *LocalNameServer {
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newError("DNS: created localhost client").AtInfo().WriteToLog()
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return &LocalNameServer{
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client: localdns.New(),
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}
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}
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// NewLocalDNSClient creates localdns client object for directly lookup in system DNS.
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func NewLocalDNSClient() *Client {
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return &Client{server: NewLocalNameServer()}
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}
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