Xray-core/features/dns/client.go
yuhan6665 f50eff5ebb
Add Fake DNS support (#309)
Co-authored-by: Xiaokang Wang <xiaokangwang@outlook.com>
Co-authored-by: loyalsoldier <10487845+Loyalsoldier@users.noreply.github.com>
Co-authored-by: kslr <kslrwang@gmail.com>
2021-03-07 04:39:50 +00:00

53 lines
1.2 KiB
Go

package dns
import (
"github.com/xtls/xray-core/common/errors"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/serial"
"github.com/xtls/xray-core/features"
)
// IPOption is an object for IP query options.
type IPOption struct {
IPv4Enable bool
IPv6Enable bool
FakeEnable bool
}
// Client is a Xray feature for querying DNS information.
//
// xray:api:stable
type Client interface {
features.Feature
// LookupIP returns IP address for the given domain. IPs may contain IPv4 and/or IPv6 addresses.
LookupIP(domain string, option IPOption) ([]net.IP, error)
}
// ClientType returns the type of Client interface. Can be used for implementing common.HasType.
//
// xray:api:beta
func ClientType() interface{} {
return (*Client)(nil)
}
// ErrEmptyResponse indicates that DNS query succeeded but no answer was returned.
var ErrEmptyResponse = errors.New("empty response")
type RCodeError uint16
func (e RCodeError) Error() string {
return serial.Concat("rcode: ", uint16(e))
}
func RCodeFromError(err error) uint16 {
if err == nil {
return 0
}
cause := errors.Cause(err)
if r, ok := cause.(RCodeError); ok {
return uint16(r)
}
return 0
}