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Refine DNS Options

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This commit is contained in:
JimhHan 2021-04-10 11:36:58 +08:00
parent f20c445974
commit 217844cc37
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GPG key ID: 48D5D7CF95157AC5
10 changed files with 82 additions and 55 deletions
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25
app/dns/dns.go
View file

@ -167,33 +167,36 @@ func (s *DNS) IsOwnLink(ctx context.Context) bool {
// LookupIP implements dns.Client.
func (s *DNS) LookupIP(domain string) ([]net.IP, error) {
return s.lookupIPInternal(domain, *s.ipOption)
return s.lookupIPInternal(domain, s.ipOption.Copy())
}
// LookupOptions implements dns.Client.
func (s *DNS) LookupOptions(domain string, opt dns.IPOption) ([]net.IP, error) {
func (s *DNS) LookupOptions(domain string, opts ...dns.Option) ([]net.IP, error) {
opt := s.ipOption.Copy()
for _, o := range opts {
if o != nil {
o(opt)
}
}
return s.lookupIPInternal(domain, opt)
}
// LookupIPv4 implements dns.IPv4Lookup.
func (s *DNS) LookupIPv4(domain string) ([]net.IP, error) {
return s.lookupIPInternal(domain, dns.IPOption{
return s.lookupIPInternal(domain, &dns.IPOption{
IPv4Enable: true,
IPv6Enable: false,
FakeEnable: false,
})
}
// LookupIPv6 implements dns.IPv6Lookup.
func (s *DNS) LookupIPv6(domain string) ([]net.IP, error) {
return s.lookupIPInternal(domain, dns.IPOption{
IPv4Enable: false,
return s.lookupIPInternal(domain, &dns.IPOption{
IPv6Enable: true,
FakeEnable: false,
})
}
func (s *DNS) lookupIPInternal(domain string, option dns.IPOption) ([]net.IP, error) {
func (s *DNS) lookupIPInternal(domain string, option *dns.IPOption) ([]net.IP, error) {
if domain == "" {
return nil, newError("empty domain name")
}
@ -228,7 +231,7 @@ func (s *DNS) lookupIPInternal(domain string, option dns.IPOption) ([]net.IP, er
errs := []error{}
ctx := session.ContextWithInbound(s.ctx, &session.Inbound{Tag: s.tag})
for _, client := range s.sortClients(domain, option) {
ips, err := client.QueryIP(ctx, domain, option, s.cs)
ips, err := client.QueryIP(ctx, domain, *option, s.cs)
if len(ips) > 0 {
return ips, nil
}
@ -244,7 +247,7 @@ func (s *DNS) lookupIPInternal(domain string, option dns.IPOption) ([]net.IP, er
return nil, newError("returning nil for domain ", domain).Base(errors.Combine(errs...))
}
func (s *DNS) sortClients(domain string, option dns.IPOption) []*Client {
func (s *DNS) sortClients(domain string, option *dns.IPOption) []*Client {
clients := make([]*Client, 0, len(s.clients))
clientUsed := make([]bool, len(s.clients))
clientNames := make([]string, 0, len(s.clients))

6
app/dns/hosts.go
View file

@ -74,7 +74,7 @@ func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDoma
return sh, nil
}
func filterIP(ips []net.Address, option dns.IPOption) []net.Address {
func filterIP(ips []net.Address, option *dns.IPOption) []net.Address {
filtered := make([]net.Address, 0, len(ips))
for _, ip := range ips {
if (ip.Family().IsIPv4() && option.IPv4Enable) || (ip.Family().IsIPv6() && option.IPv6Enable) {
@ -95,7 +95,7 @@ func (h *StaticHosts) lookupInternal(domain string) []net.Address {
return ips
}
func (h *StaticHosts) lookup(domain string, option dns.IPOption, maxDepth int) []net.Address {
func (h *StaticHosts) lookup(domain string, option *dns.IPOption, maxDepth int) []net.Address {
switch addrs := h.lookupInternal(domain); {
case len(addrs) == 0: // Not recorded in static hosts, return nil
return nil
@ -113,6 +113,6 @@ func (h *StaticHosts) lookup(domain string, option dns.IPOption, maxDepth int) [
}
// Lookup returns IP addresses or proxied domain for the given domain, if exists in this StaticHosts.
func (h *StaticHosts) Lookup(domain string, option dns.IPOption) []net.Address {
func (h *StaticHosts) Lookup(domain string, option *dns.IPOption) []net.Address {
return h.lookup(domain, option, 5)
}

6
app/dns/hosts_test.go
View file

@ -40,7 +40,7 @@ func TestStaticHosts(t *testing.T) {
common.Must(err)
{
ips := hosts.Lookup("example.com", dns.IPOption{
ips := hosts.Lookup("example.com", &dns.IPOption{
IPv4Enable: true,
IPv6Enable: true,
})
@ -53,7 +53,7 @@ func TestStaticHosts(t *testing.T) {
}
{
ips := hosts.Lookup("www.example.cn", dns.IPOption{
ips := hosts.Lookup("www.example.cn", &dns.IPOption{
IPv4Enable: true,
IPv6Enable: true,
})
@ -66,7 +66,7 @@ func TestStaticHosts(t *testing.T) {
}
{
ips := hosts.Lookup("baidu.com", dns.IPOption{
ips := hosts.Lookup("baidu.com", &dns.IPOption{
IPv4Enable: false,
IPv6Enable: true,
})

14
app/dns/options.go
View file

@ -2,23 +2,15 @@ package dns
import "github.com/xtls/xray-core/features/dns"
type Option interface {
queryIPv4() bool
queryIPv6() bool
queryIP() bool
queryFake() bool
canDoQuery(c *Client) bool
}
func isIPQuery(o dns.IPOption) bool {
func isIPQuery(o *dns.IPOption) bool {
return o.IPv4Enable || o.IPv6Enable
}
func canQueryOnClient(o dns.IPOption, c *Client) bool {
func canQueryOnClient(o *dns.IPOption, c *Client) bool {
isIPClient := !(c.Name() == FakeDNSName)
return isIPClient && isIPQuery(o)
}
func isQuery(o dns.IPOption) bool {
func isQuery(o *dns.IPOption) bool {
return !(o.IPv4Enable || o.IPv6Enable || o.FakeEnable)
}

44
features/dns/client.go
View file

@ -14,6 +14,12 @@ type IPOption struct {
FakeEnable bool
}
func (p *IPOption) Copy() *IPOption {
return &IPOption{p.IPv4Enable, p.IPv6Enable, p.FakeEnable}
}
type Option func(dopt *IPOption) *IPOption
// Client is a Xray feature for querying DNS information.
//
// xray:api:stable
@ -23,8 +29,8 @@ type Client interface {
// LookupIP returns IP address for the given domain. IPs may contain IPv4 and/or IPv6 addresses.
LookupIP(domain string) ([]net.IP, error)
// LookupOptions query IP address for domain with IPOption.
LookupOptions(domain string, opt IPOption) ([]net.IP, error)
// LookupOptions query IP address for domain with *IPOption.
LookupOptions(domain string, opt ...Option) ([]net.IP, error)
}
// IPv4Lookup is an optional feature for querying IPv4 addresses only.
@ -69,9 +75,33 @@ func RCodeFromError(err error) uint16 {
}
var (
LookupIPv4 = IPOption{IPv4Enable: true}
LookupIPv6 = IPOption{IPv6Enable: true}
LookupIP = IPOption{IPv4Enable: true, IPv6Enable: true}
LookupFake = IPOption{FakeEnable: true}
LookupAll = IPOption{true, true, true}
LookupIPv4Only = func(d *IPOption) *IPOption {
d.IPv4Enable = true
d.IPv6Enable = false
return d
}
LookupIPv6Only = func(d *IPOption) *IPOption {
d.IPv4Enable = false
d.IPv6Enable = true
return d
}
LookupIP = func(d *IPOption) *IPOption {
d.IPv4Enable = true
d.IPv6Enable = true
return d
}
LookupFake = func(d *IPOption) *IPOption {
d.FakeEnable = true
return d
}
LookupNoFake = func(d *IPOption) *IPOption {
d.FakeEnable = false
return d
}
LookupAll = func(d *IPOption) *IPOption {
LookupIP(d)
LookupFake(d)
return d
}
)

2
features/dns/localdns/client.go
View file

@ -39,7 +39,7 @@ func (*Client) LookupIP(host string) ([]net.IP, error) {
}
// LookupOptions implements Client.
func (c *Client) LookupOptions(host string, _ dns.IPOption) ([]net.IP, error) {
func (c *Client) LookupOptions(host string, _ ...dns.Option) ([]net.IP, error) {
return c.LookupIP(host)
}

10
proxy/dns/dns.go
View file

@ -199,18 +199,16 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
var err error
var ttl uint32 = 600
var opt = dns.LookupIP
var opt dns.Option
switch qType {
case dnsmessage.TypeA:
opt = dns.LookupIPv4
opt = dns.LookupIPv4Only
case dnsmessage.TypeAAAA:
opt = dns.LookupIPv6
opt = dns.LookupIPv6Only
}
opt.FakeEnable = true
ips, err = h.client.LookupOptions(domain, opt)
ips, err = h.client.LookupOptions(domain, opt, dns.LookupFake)
rcode := dns.RCodeFromError(err)
if rcode == 0 && len(ips) == 0 && err != dns.ErrEmptyResponse {
newError("ip query").Base(err).WriteToLog()

9
proxy/freedom/freedom.go
View file

@ -59,15 +59,14 @@ func (h *Handler) policy() policy.Session {
}
func (h *Handler) resolveIP(ctx context.Context, domain string, localAddr net.Address) net.Address {
var opt = dns.LookupIP
var opt dns.Option
if h.config.DomainStrategy == Config_USE_IP4 || (localAddr != nil && localAddr.Family().IsIPv4()) {
opt = dns.LookupIPv4
opt = dns.LookupIPv4Only
} else if h.config.DomainStrategy == Config_USE_IP6 || (localAddr != nil && localAddr.Family().IsIPv6()) {
opt = dns.LookupIPv6
opt = dns.LookupIPv6Only
}
opt.FakeEnable = true
ips, err := h.dns.LookupOptions(domain, opt)
ips, err := h.dns.LookupOptions(domain, opt, dns.LookupNoFake)
if err != nil {
newError("failed to get IP address for domain ", domain).Base(err).WriteToLog(session.ExportIDToError(ctx))
}

13
testing/mocks/dns.go
View file

@ -65,18 +65,23 @@ func (mr *DNSClientMockRecorder) LookupIP(arg0 interface{}) *gomock.Call {
}
// LookupOptions mocks base method.
func (m *DNSClient) LookupOptions(arg0 string, arg1 dns.IPOption) ([]net.IP, error) {
func (m *DNSClient) LookupOptions(arg0 string, arg1 ...dns.Option) ([]net.IP, error) {
m.ctrl.T.Helper()
ret := m.ctrl.Call(m, "LookupOptions", arg0, arg1)
varargs := []interface{}{arg0}
for _, a := range arg1 {
varargs = append(varargs, a)
}
ret := m.ctrl.Call(m, "LookupOptions", varargs...)
ret0, _ := ret[0].([]net.IP)
ret1, _ := ret[1].(error)
return ret0, ret1
}
// LookupOptions indicates an expected call of LookupOptions.
func (mr *DNSClientMockRecorder) LookupOptions(arg0, arg1 interface{}) *gomock.Call {
func (mr *DNSClientMockRecorder) LookupOptions(arg0 interface{}, arg1 ...interface{}) *gomock.Call {
mr.mock.ctrl.T.Helper()
return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LookupOptions", reflect.TypeOf((*DNSClient)(nil).LookupOptions), arg0, arg1)
varargs := append([]interface{}{arg0}, arg1...)
return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LookupOptions", reflect.TypeOf((*DNSClient)(nil).LookupOptions), varargs...)
}
// Start mocks base method.

8
transport/internet/system_dialer.go
View file

@ -63,17 +63,17 @@ func (d *DefaultSystemDialer) lookupIP(domain string, strategy DomainStrategy, l
return nil, nil
}
var opt = dns.LookupIP
var opt dns.Option
switch {
case strategy == DomainStrategy_USE_IP4 || (localAddr != nil && localAddr.Family().IsIPv4()):
opt = dns.LookupIPv4
opt = dns.LookupIPv4Only
case strategy == DomainStrategy_USE_IP6 || (localAddr != nil && localAddr.Family().IsIPv6()):
opt = dns.LookupIPv6
opt = dns.LookupIPv6Only
case strategy == DomainStrategy_AS_IS:
return nil, nil
}
return d.dns.LookupOptions(domain, opt)
return d.dns.LookupOptions(domain, opt, dns.LookupNoFake)
}
func (d *DefaultSystemDialer) canLookupIP(ctx context.Context, dst net.Destination, sockopt *SocketConfig) bool {