mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-12-22 01:57:12 -05:00
9957c64b4a
the internal dns system can correctly handle the cases where: 1) domain has no A or AAAA records 2) domain doesn't exist fixes #1565
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package dns
|
|
|
|
import (
|
|
"v2ray.com/core/common/errors"
|
|
"v2ray.com/core/common/net"
|
|
"v2ray.com/core/common/serial"
|
|
"v2ray.com/core/features"
|
|
)
|
|
|
|
// 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)
|
|
}
|
|
|
|
// 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
|
|
}
|