Xray-core/infra/conf/fakedns.go

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package conf
import (
"github.com/golang/protobuf/proto"
"github.com/xtls/xray-core/app/dns/fakedns"
)
type FakeDNSConfig struct {
IPPool string `json:"ipPool"`
LruSize int64 `json:"poolSize"`
}
func (f FakeDNSConfig) Build() (proto.Message, error) {
return &fakedns.FakeDnsPool{
IpPool: f.IPPool,
LruSize: f.LruSize,
}, nil
}
type FakeDNSPostProcessingStage struct{}
func (FakeDNSPostProcessingStage) Process(conf *Config) error {
var fakeDNSInUse bool
if conf.DNSConfig != nil {
for _, v := range conf.DNSConfig.Servers {
if v.Address.Family().IsDomain() {
if v.Address.Domain() == "fakedns" {
fakeDNSInUse = true
}
}
}
}
if fakeDNSInUse {
if conf.FakeDNS == nil {
// Add a Fake DNS Config if there is none
conf.FakeDNS = &FakeDNSConfig{
IPPool: "240.0.0.0/8",
LruSize: 65535,
}
}
found := false
// Check if there is a Outbound with necessary sniffer on
var inbounds []InboundDetourConfig
if len(conf.InboundConfigs) > 0 {
inbounds = append(inbounds, conf.InboundConfigs...)
}
for _, v := range inbounds {
if v.SniffingConfig != nil && v.SniffingConfig.Enabled && v.SniffingConfig.DestOverride != nil {
for _, dov := range *v.SniffingConfig.DestOverride {
if dov == "fakedns" {
found = true
}
}
}
}
if !found {
newError("Defined Fake DNS but haven't enabled fake dns sniffing at any inbound.").AtWarning().WriteToLog()
}
}
return nil
}