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50 lines
1.2 KiB
50 lines
1.2 KiB
package dns
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import (
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"context"
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"github.com/xtls/xray-core/common/net"
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"github.com/xtls/xray-core/core"
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"github.com/xtls/xray-core/features/dns"
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)
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type FakeDNSServer struct {
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fakeDNSEngine dns.FakeDNSEngine
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}
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func NewFakeDNSServer() *FakeDNSServer {
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return &FakeDNSServer{}
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}
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func (FakeDNSServer) Name() string {
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return "FakeDNS"
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}
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func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, _ net.IP, opt dns.IPOption, _ bool) ([]net.IP, error) {
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if f.fakeDNSEngine == nil {
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if err := core.RequireFeatures(ctx, func(fd dns.FakeDNSEngine) {
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f.fakeDNSEngine = fd
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}); err != nil {
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return nil, newError("Unable to locate a fake DNS Engine").Base(err).AtError()
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}
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}
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var ips []net.Address
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if fkr0, ok := f.fakeDNSEngine.(dns.FakeDNSEngineRev0); ok {
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ips = fkr0.GetFakeIPForDomain3(domain, opt.IPv4Enable, opt.IPv6Enable)
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} else {
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ips = f.fakeDNSEngine.GetFakeIPForDomain(domain)
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}
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netIP, err := toNetIP(ips)
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if err != nil {
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return nil, newError("Unable to convert IP to net ip").Base(err).AtError()
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}
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newError(f.Name(), " got answer: ", domain, " -> ", ips).AtInfo().WriteToLog()
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if len(netIP) > 0 {
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return netIP, nil
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}
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return nil, dns.ErrEmptyResponse
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}
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