Xray-core/features/dns/client.go

53 lines
1.2 KiB
Go
Raw Normal View History

2020-11-25 13:01:53 +02:00
package dns
import (
2020-12-04 03:36:16 +02:00
"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"
2020-11-25 13:01:53 +02:00
)
// IPOption is an object for IP query options.
type IPOption struct {
IPv4Enable bool
IPv6Enable bool
FakeEnable bool
}
2020-11-25 13:01:53 +02:00
// 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)
2020-11-25 13:01:53 +02:00
}
// 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
}