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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
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import (
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"v2ray.com/core/common/errors"
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"v2ray.com/core/common/net"
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"v2ray.com/core/common/serial"
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"v2ray.com/core/features"
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)
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// Client is a V2Ray feature for querying DNS information.
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//
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// v2ray:api:stable
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type Client interface {
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features.Feature
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// LookupIP returns IP address for the given domain. IPs may contain IPv4 and/or IPv6 addresses.
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LookupIP(domain string) ([]net.IP, error)
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}
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// IPv4Lookup is an optional feature for querying IPv4 addresses only.
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//
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// v2ray:api:beta
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type IPv4Lookup interface {
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LookupIPv4(domain string) ([]net.IP, error)
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}
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// IPv6Lookup is an optional feature for querying IPv6 addresses only.
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//
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// v2ray:api:beta
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type IPv6Lookup interface {
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LookupIPv6(domain string) ([]net.IP, error)
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}
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// ClientType returns the type of Client interface. Can be used for implementing common.HasType.
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//
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// v2ray:api:beta
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func ClientType() interface{} {
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return (*Client)(nil)
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}
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// ErrEmptyResponse indicates that DNS query succeeded but no answer was returned.
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var ErrEmptyResponse = errors.New("empty response")
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type RCodeError uint16
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func (e RCodeError) Error() string {
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return serial.Concat("rcode: ", uint16(e))
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}
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func RCodeFromError(err error) uint16 {
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if err == nil {
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return 0
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}
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cause := errors.Cause(err)
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if r, ok := cause.(RCodeError); ok {
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return uint16(r)
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}
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return 0
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}
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