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client.go
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client.go
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package dns
import (
"github.com/bmclab-git/v2ray-core/v5/common/errors"
"github.com/bmclab-git/v2ray-core/v5/common/net"
"github.com/bmclab-git/v2ray-core/v5/common/serial"
"github.com/bmclab-git/v2ray-core/v5/features"
)
// IPOption is an object for IP query options.
type IPOption struct {
IPv4Enable bool
IPv6Enable bool
FakeEnable bool
}
// Client is a V2Ray feature for querying DNS information.
//
// v2ray: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) ([]net.IP, error)
}
// IPv4Lookup is an optional feature for querying IPv4 addresses only.
//
// v2ray:api:beta
type IPv4Lookup interface {
LookupIPv4(domain string) ([]net.IP, error)
}
// IPv6Lookup is an optional feature for querying IPv6 addresses only.
//
// v2ray:api:beta
type IPv6Lookup interface {
LookupIPv6(domain string) ([]net.IP, error)
}
// ClientWithIPOption is an optional feature for querying DNS information.
//
// v2ray:api:beta
type ClientWithIPOption interface {
// GetIPOption returns IPOption for the DNS client.
GetIPOption() *IPOption
// SetQueryOption sets IPv4Enable and IPv6Enable for the DNS client.
SetQueryOption(isIPv4Enable, isIPv6Enable bool)
// SetFakeDNSOption sets FakeEnable option for DNS client.
SetFakeDNSOption(isFakeEnable bool)
}
// ClientType returns the type of Client interface. Can be used for implementing common.HasType.
//
// v2ray: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
}