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Some refines related to direct/freedom and targetStrategy; More intelligent "useIP"/"ForceIP", enhance "origin" functionality (#5030)

Browse Source 
https://github.com/XTLS/Xray-core/pull/5009#issuecomment-3194264277
This commit is contained in:
patterniha
2025-08-19 16:03:12 +02:00
parent 3a54924045
commit 6d1695a686
11 changed files with 245 additions and 347 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
proxy/freedom/config.go
View File

@@ -1,44 +1 @@
package freedom
var strategy = [][]byte{
// name strategy, prefer, fallback
{0, 0, 0}, // AsIs none, /, /
{1, 0, 0}, // UseIP use, both, none
{1, 4, 0}, // UseIPv4 use, 4, none
{1, 6, 0}, // UseIPv6 use, 6, none
{1, 4, 6}, // UseIPv4v6 use, 4, 6
{1, 6, 4}, // UseIPv6v4 use, 6, 4
{2, 0, 0}, // ForceIP force, both, none
{2, 4, 0}, // ForceIPv4 force, 4, none
{2, 6, 0}, // ForceIPv6 force, 6, none
{2, 4, 6}, // ForceIPv4v6 force, 4, 6
{2, 6, 4}, // ForceIPv6v4 force, 6, 4
}
func (c *Config) hasStrategy() bool {
return strategy[c.DomainStrategy][0] != 0
}
func (c *Config) forceIP() bool {
return strategy[c.DomainStrategy][0] == 2
}
func (c *Config) preferIP4() bool {
return strategy[c.DomainStrategy][1] == 4 || strategy[c.DomainStrategy][1] == 0
}
func (c *Config) preferIP6() bool {
return strategy[c.DomainStrategy][1] == 6 || strategy[c.DomainStrategy][1] == 0
}
func (c *Config) hasFallback() bool {
return strategy[c.DomainStrategy][2] != 0
}
func (c *Config) fallbackIP4() bool {
return strategy[c.DomainStrategy][2] == 4
}
func (c *Config) fallbackIP6() bool {
return strategy[c.DomainStrategy][2] == 6
}

257
proxy/freedom/config.pb.go
View File

@@ -8,6 +8,7 @@ package freedom
import (
protocol "github.com/xtls/xray-core/common/protocol"
internet "github.com/xtls/xray-core/transport/internet"
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
@@ -21,79 +22,6 @@ const (
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
type Config_DomainStrategy int32
const (
Config_AS_IS Config_DomainStrategy = 0
Config_USE_IP Config_DomainStrategy = 1
Config_USE_IP4 Config_DomainStrategy = 2
Config_USE_IP6 Config_DomainStrategy = 3
Config_USE_IP46 Config_DomainStrategy = 4
Config_USE_IP64 Config_DomainStrategy = 5
Config_FORCE_IP Config_DomainStrategy = 6
Config_FORCE_IP4 Config_DomainStrategy = 7
Config_FORCE_IP6 Config_DomainStrategy = 8
Config_FORCE_IP46 Config_DomainStrategy = 9
Config_FORCE_IP64 Config_DomainStrategy = 10
)
// Enum value maps for Config_DomainStrategy.
var (
Config_DomainStrategy_name = map[int32]string{
0: "AS_IS",
1: "USE_IP",
2: "USE_IP4",
3: "USE_IP6",
4: "USE_IP46",
5: "USE_IP64",
6: "FORCE_IP",
7: "FORCE_IP4",
8: "FORCE_IP6",
9: "FORCE_IP46",
10: "FORCE_IP64",
}
Config_DomainStrategy_value = map[string]int32{
"AS_IS": 0,
"USE_IP": 1,
"USE_IP4": 2,
"USE_IP6": 3,
"USE_IP46": 4,
"USE_IP64": 5,
"FORCE_IP": 6,
"FORCE_IP4": 7,
"FORCE_IP6": 8,
"FORCE_IP46": 9,
"FORCE_IP64": 10,
}
)
func (x Config_DomainStrategy) Enum() *Config_DomainStrategy {
p := new(Config_DomainStrategy)
*p = x
return p
}
func (x Config_DomainStrategy) String() string {
return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
}
func (Config_DomainStrategy) Descriptor() protoreflect.EnumDescriptor {
return file_proxy_freedom_config_proto_enumTypes[0].Descriptor()
}
func (Config_DomainStrategy) Type() protoreflect.EnumType {
return &file_proxy_freedom_config_proto_enumTypes[0]
}
func (x Config_DomainStrategy) Number() protoreflect.EnumNumber {
return protoreflect.EnumNumber(x)
}
// Deprecated: Use Config_DomainStrategy.Descriptor instead.
func (Config_DomainStrategy) EnumDescriptor() ([]byte, []int) {
return file_proxy_freedom_config_proto_rawDescGZIP(), []int{3, 0}
}
type DestinationOverride struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@@ -330,12 +258,12 @@ type Config struct {
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
DomainStrategy Config_DomainStrategy `protobuf:"varint,1,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.proxy.freedom.Config_DomainStrategy" json:"domain_strategy,omitempty"`
DestinationOverride *DestinationOverride `protobuf:"bytes,3,opt,name=destination_override,json=destinationOverride,proto3" json:"destination_override,omitempty"`
UserLevel uint32 `protobuf:"varint,4,opt,name=user_level,json=userLevel,proto3" json:"user_level,omitempty"`
Fragment *Fragment `protobuf:"bytes,5,opt,name=fragment,proto3" json:"fragment,omitempty"`
ProxyProtocol uint32 `protobuf:"varint,6,opt,name=proxy_protocol,json=proxyProtocol,proto3" json:"proxy_protocol,omitempty"`
Noises []*Noise `protobuf:"bytes,7,rep,name=noises,proto3" json:"noises,omitempty"`
DomainStrategy internet.DomainStrategy `protobuf:"varint,1,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.transport.internet.DomainStrategy" json:"domain_strategy,omitempty"`
DestinationOverride *DestinationOverride `protobuf:"bytes,3,opt,name=destination_override,json=destinationOverride,proto3" json:"destination_override,omitempty"`
UserLevel uint32 `protobuf:"varint,4,opt,name=user_level,json=userLevel,proto3" json:"user_level,omitempty"`
Fragment *Fragment `protobuf:"bytes,5,opt,name=fragment,proto3" json:"fragment,omitempty"`
ProxyProtocol uint32 `protobuf:"varint,6,opt,name=proxy_protocol,json=proxyProtocol,proto3" json:"proxy_protocol,omitempty"`
Noises []*Noise `protobuf:"bytes,7,rep,name=noises,proto3" json:"noises,omitempty"`
}
func (x *Config) Reset() {
@@ -368,11 +296,11 @@ func (*Config) Descriptor() ([]byte, []int) {
return file_proxy_freedom_config_proto_rawDescGZIP(), []int{3}
}
func (x *Config) GetDomainStrategy() Config_DomainStrategy {
func (x *Config) GetDomainStrategy() internet.DomainStrategy {
if x != nil {
return x.DomainStrategy
}
return Config_AS_IS
return internet.DomainStrategy(0)
}
func (x *Config) GetDestinationOverride() *DestinationOverride {
@@ -418,81 +346,72 @@ var file_proxy_freedom_config_proto_rawDesc = []byte{
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}
var (
@@ -507,22 +426,21 @@ func file_proxy_freedom_config_proto_rawDescGZIP() []byte {
return file_proxy_freedom_config_proto_rawDescData
}
var file_proxy_freedom_config_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
var file_proxy_freedom_config_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
var file_proxy_freedom_config_proto_goTypes = []any{
(Config_DomainStrategy)(0), // 0: xray.proxy.freedom.Config.DomainStrategy
(*DestinationOverride)(nil), // 1: xray.proxy.freedom.DestinationOverride
(*Fragment)(nil), // 2: xray.proxy.freedom.Fragment
(*Noise)(nil), // 3: xray.proxy.freedom.Noise
(*Config)(nil), // 4: xray.proxy.freedom.Config
(*protocol.ServerEndpoint)(nil), // 5: xray.common.protocol.ServerEndpoint
(*DestinationOverride)(nil), // 0: xray.proxy.freedom.DestinationOverride
(*Fragment)(nil), // 1: xray.proxy.freedom.Fragment
(*Noise)(nil), // 2: xray.proxy.freedom.Noise
(*Config)(nil), // 3: xray.proxy.freedom.Config
(*protocol.ServerEndpoint)(nil), // 4: xray.common.protocol.ServerEndpoint
(internet.DomainStrategy)(0), // 5: xray.transport.internet.DomainStrategy
}
var file_proxy_freedom_config_proto_depIdxs = []int32{
5, // 0: xray.proxy.freedom.DestinationOverride.server:type_name -> xray.common.protocol.ServerEndpoint
0, // 1: xray.proxy.freedom.Config.domain_strategy:type_name -> xray.proxy.freedom.Config.DomainStrategy
1, // 2: xray.proxy.freedom.Config.destination_override:type_name -> xray.proxy.freedom.DestinationOverride
2, // 3: xray.proxy.freedom.Config.fragment:type_name -> xray.proxy.freedom.Fragment
3, // 4: xray.proxy.freedom.Config.noises:type_name -> xray.proxy.freedom.Noise
4, // 0: xray.proxy.freedom.DestinationOverride.server:type_name -> xray.common.protocol.ServerEndpoint
5, // 1: xray.proxy.freedom.Config.domain_strategy:type_name -> xray.transport.internet.DomainStrategy
0, // 2: xray.proxy.freedom.Config.destination_override:type_name -> xray.proxy.freedom.DestinationOverride
1, // 3: xray.proxy.freedom.Config.fragment:type_name -> xray.proxy.freedom.Fragment
2, // 4: xray.proxy.freedom.Config.noises:type_name -> xray.proxy.freedom.Noise
5, // [5:5] is the sub-list for method output_type
5, // [5:5] is the sub-list for method input_type
5, // [5:5] is the sub-list for extension type_name
@@ -540,14 +458,13 @@ func file_proxy_freedom_config_proto_init() {
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_proxy_freedom_config_proto_rawDesc,
NumEnums: 1,
NumEnums: 0,
NumMessages: 4,
NumExtensions: 0,
NumServices: 0,
},
GoTypes: file_proxy_freedom_config_proto_goTypes,
DependencyIndexes: file_proxy_freedom_config_proto_depIdxs,
EnumInfos: file_proxy_freedom_config_proto_enumTypes,
MessageInfos: file_proxy_freedom_config_proto_msgTypes,
}.Build()
File_proxy_freedom_config_proto = out.File

16
proxy/freedom/config.proto
View File

@@ -7,6 +7,7 @@ option java_package = "com.xray.proxy.freedom";
option java_multiple_files = true;
import "common/protocol/server_spec.proto";
import "transport/internet/config.proto";
message DestinationOverride {
xray.common.protocol.ServerEndpoint server = 1;
@@ -32,20 +33,7 @@ message Noise {
}
message Config {
enum DomainStrategy {
AS_IS = 0;
USE_IP = 1;
USE_IP4 = 2;
USE_IP6 = 3;
USE_IP46 = 4;
USE_IP64 = 5;
FORCE_IP = 6;
FORCE_IP4 = 7;
FORCE_IP6 = 8;
FORCE_IP46 = 9;
FORCE_IP64 = 10;
}
DomainStrategy domain_strategy = 1;
xray.transport.internet.DomainStrategy domain_strategy = 1;
DestinationOverride destination_override = 3;
uint32 user_level = 4;
Fragment fragment = 5;

96
proxy/freedom/freedom.go
View File

@@ -20,7 +20,6 @@ import (
"github.com/xtls/xray-core/common/task"
"github.com/xtls/xray-core/common/utils"
"github.com/xtls/xray-core/core"
"github.com/xtls/xray-core/features/dns"
"github.com/xtls/xray-core/features/policy"
"github.com/xtls/xray-core/features/stats"
"github.com/xtls/xray-core/proxy"
@@ -35,8 +34,8 @@ var useSplice bool
func init() {
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
h := new(Handler)
if err := core.RequireFeatures(ctx, func(pm policy.Manager, d dns.Client) error {
return h.Init(config.(*Config), pm, d)
if err := core.RequireFeatures(ctx, func(pm policy.Manager) error {
return h.Init(config.(*Config), pm)
}); err != nil {
return nil, err
}
@@ -53,16 +52,13 @@ func init() {
// Handler handles Freedom connections.
type Handler struct {
policyManager policy.Manager
dns dns.Client
config *Config
}
// Init initializes the Handler with necessary parameters.
func (h *Handler) Init(config *Config, pm policy.Manager, d dns.Client) error {
func (h *Handler) Init(config *Config, pm policy.Manager) error {
h.config = config
h.policyManager = pm
h.dns = d
return nil
}
@@ -71,28 +67,6 @@ func (h *Handler) policy() policy.Session {
return p
}
func (h *Handler) resolveIP(ctx context.Context, domain string, localAddr net.Address) net.Address {
ips, _, err := h.dns.LookupIP(domain, dns.IPOption{
IPv4Enable: (localAddr == nil || localAddr.Family().IsIPv4()) && h.config.preferIP4(),
IPv6Enable: (localAddr == nil || localAddr.Family().IsIPv6()) && h.config.preferIP6(),
})
{ // Resolve fallback
if (len(ips) == 0 || err != nil) && h.config.hasFallback() && localAddr == nil {
ips, _, err = h.dns.LookupIP(domain, dns.IPOption{
IPv4Enable: h.config.fallbackIP4(),
IPv6Enable: h.config.fallbackIP6(),
})
}
}
if err != nil {
errors.LogInfoInner(ctx, err, "failed to get IP address for domain ", domain)
}
if len(ips) == 0 {
return nil
}
return net.IPAddress(ips[dice.Roll(len(ips))])
}
func isValidAddress(addr *net.IPOrDomain) bool {
if addr == nil {
return false
@@ -114,6 +88,12 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
inbound := session.InboundFromContext(ctx)
destination := ob.Target
origTargetAddr := ob.OriginalTarget.Address
if origTargetAddr == nil {
origTargetAddr = ob.Target.Address
}
dialer.SetOutboundGateway(ctx, ob)
outGateway := ob.Gateway
UDPOverride := net.UDPDestination(nil, 0)
if h.config.DestinationOverride != nil {
server := h.config.DestinationOverride.Server
@@ -133,17 +113,24 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
var conn stat.Connection
err := retry.ExponentialBackoff(5, 100).On(func() error {
dialDest := destination
if h.config.hasStrategy() && dialDest.Address.Family().IsDomain() {
ip := h.resolveIP(ctx, dialDest.Address.Domain(), dialer.Address())
if ip != nil {
if h.config.DomainStrategy.HasStrategy() && dialDest.Address.Family().IsDomain() {
strategy := h.config.DomainStrategy
if destination.Network == net.Network_UDP && origTargetAddr != nil && outGateway == nil {
strategy = strategy.GetDynamicStrategy(origTargetAddr.Family())
}
ips, err := internet.LookupForIP(dialDest.Address.Domain(), strategy, outGateway)
if err != nil {
errors.LogInfoInner(ctx, err, "failed to get IP address for domain ", dialDest.Address.Domain())
if h.config.DomainStrategy.ForceIP() {
return err
}
} else {
dialDest = net.Destination{
Network: dialDest.Network,
Address: ip,
Address: net.IPAddress(ips[dice.Roll(len(ips))]),
Port: dialDest.Port,
}
errors.LogInfo(ctx, "dialing to ", dialDest)
} else if h.config.forceIP() {
return dns.ErrEmptyResponse
}
}
@@ -203,7 +190,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
writer = buf.NewWriter(conn)
}
} else {
writer = NewPacketWriter(conn, h, ctx, UDPOverride, destination)
writer = NewPacketWriter(conn, h, UDPOverride, destination)
if h.config.Noises != nil {
errors.LogDebug(ctx, "NOISE", h.config.Noises)
writer = &NoisePacketWriter{
@@ -339,7 +326,7 @@ func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
}
// DialDest means the dial target used in the dialer when creating conn
func NewPacketWriter(conn net.Conn, h *Handler, ctx context.Context, UDPOverride net.Destination, DialDest net.Destination) buf.Writer {
func NewPacketWriter(conn net.Conn, h *Handler, UDPOverride net.Destination, DialDest net.Destination) buf.Writer {
iConn := conn
statConn, ok := iConn.(*stat.CounterConnection)
if ok {
@@ -360,9 +347,9 @@ func NewPacketWriter(conn net.Conn, h *Handler, ctx context.Context, UDPOverride
PacketConnWrapper: c,
Counter: counter,
Handler: h,
Context: ctx,
UDPOverride: UDPOverride,
resolvedUDPAddr: resolvedUDPAddr,
ResolvedUDPAddr: resolvedUDPAddr,
LocalAddr: net.DestinationFromAddr(conn.LocalAddr()).Address,
}
}
@@ -373,14 +360,14 @@ type PacketWriter struct {
*internet.PacketConnWrapper
stats.Counter
*Handler
context.Context
UDPOverride net.Destination
// Dest of udp packets might be a domain, we will resolve them to IP
// But resolver will return a random one if the domain has many IPs
// Resulting in these packets being sent to many different IPs randomly
// So, cache and keep the resolve result
resolvedUDPAddr *utils.TypedSyncMap[string, net.Address]
ResolvedUDPAddr *utils.TypedSyncMap[string, net.Address]
LocalAddr net.Address
}
func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
@@ -400,20 +387,22 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
b.UDP.Port = w.UDPOverride.Port
}
if b.UDP.Address.Family().IsDomain() {
if ip, ok := w.resolvedUDPAddr.Load(b.UDP.Address.Domain()); ok {
if ip, ok := w.ResolvedUDPAddr.Load(b.UDP.Address.Domain()); ok {
b.UDP.Address = ip
} else {
ShouldUseSystemResolver := true
if w.Handler.config.hasStrategy() {
ip = w.Handler.resolveIP(w.Context, b.UDP.Address.Domain(), nil)
if ip != nil {
if w.Handler.config.DomainStrategy.HasStrategy() {
ips, err := internet.LookupForIP(b.UDP.Address.Domain(), w.Handler.config.DomainStrategy, w.LocalAddr)
if err != nil {
// drop packet if resolve failed when forceIP
if w.Handler.config.DomainStrategy.ForceIP() {
b.Release()
continue
}
} else {
ip = net.IPAddress(ips[dice.Roll(len(ips))])
ShouldUseSystemResolver = false
}
// drop packet if resolve failed when forceIP
if ip == nil && w.Handler.config.forceIP() {
b.Release()
continue
}
}
if ShouldUseSystemResolver {
udpAddr, err := net.ResolveUDPAddr("udp", b.UDP.NetAddr())
@@ -425,7 +414,7 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
}
}
if ip != nil {
b.UDP.Address, _ = w.resolvedUDPAddr.LoadOrStore(b.UDP.Address.Domain(), ip)
b.UDP.Address, _ = w.ResolvedUDPAddr.LoadOrStore(b.UDP.Address.Domain(), ip)
}
}
}
@@ -496,7 +485,10 @@ func (w *NoisePacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
if err != nil {
return err
}
w.Writer.WriteMultiBuffer(buf.MultiBuffer{buf.FromBytes(noise)})
err = w.Writer.WriteMultiBuffer(buf.MultiBuffer{buf.FromBytes(noise)})
if err != nil {
return err
}
if n.DelayMin != 0 || n.DelayMax != 0 {
time.Sleep(time.Duration(crypto.RandBetween(int64(n.DelayMin), int64(n.DelayMax))) * time.Millisecond)