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Merge pull request #2 from patterniha/happy

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Happy
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patterniha 2025-05-07 19:52:19 +03:30 committed by GitHub
commit f774518905
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GPG Key ID: B5690EEEBB952194
6 changed files with 413 additions and 99 deletions
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61
infra/conf/transport_internet.go
View File

@ -699,25 +699,34 @@ type CustomSockoptConfig struct {
Type string `json:"type"`
}
type HappyEyeballsConfig struct {
Enabled bool `json:"enabled"`
PrioritizeIPv6 bool `json:"prioritizeIPv6"`
TryDelayMs uint64 `json:"tryDelayMs"`
Interleave uint32 `json:"interleave"`
MaxConcurrentTry uint32 `json:"maxConcurrentTry"`
}
type SocketConfig struct {
Mark int32 `json:"mark"`
TFO interface{} `json:"tcpFastOpen"`
TProxy string `json:"tproxy"`
AcceptProxyProtocol bool `json:"acceptProxyProtocol"`
DomainStrategy string `json:"domainStrategy"`
DialerProxy string `json:"dialerProxy"`
TCPKeepAliveInterval int32 `json:"tcpKeepAliveInterval"`
TCPKeepAliveIdle int32 `json:"tcpKeepAliveIdle"`
TCPCongestion string `json:"tcpCongestion"`
TCPWindowClamp int32 `json:"tcpWindowClamp"`
TCPMaxSeg int32 `json:"tcpMaxSeg"`
Penetrate bool `json:"penetrate"`
TCPUserTimeout int32 `json:"tcpUserTimeout"`
V6only bool `json:"v6only"`
Interface string `json:"interface"`
TcpMptcp bool `json:"tcpMptcp"`
CustomSockopt []*CustomSockoptConfig `json:"customSockopt"`
AddressPortStrategy string `json:"addressPortStrategy"`
Mark int32 `json:"mark"`
TFO interface{} `json:"tcpFastOpen"`
TProxy string `json:"tproxy"`
AcceptProxyProtocol bool `json:"acceptProxyProtocol"`
DomainStrategy string `json:"domainStrategy"`
DialerProxy string `json:"dialerProxy"`
TCPKeepAliveInterval int32 `json:"tcpKeepAliveInterval"`
TCPKeepAliveIdle int32 `json:"tcpKeepAliveIdle"`
TCPCongestion string `json:"tcpCongestion"`
TCPWindowClamp int32 `json:"tcpWindowClamp"`
TCPMaxSeg int32 `json:"tcpMaxSeg"`
Penetrate bool `json:"penetrate"`
TCPUserTimeout int32 `json:"tcpUserTimeout"`
V6only bool `json:"v6only"`
Interface string `json:"interface"`
TcpMptcp bool `json:"tcpMptcp"`
CustomSockopt []*CustomSockoptConfig `json:"customSockopt"`
AddressPortStrategy string `json:"addressPortStrategy"`
HappyEyeballsSettings *HappyEyeballsConfig `json:"happyEyeballs"`
}
// Build implements Buildable.
@ -809,6 +818,21 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
return nil, errors.New("unsupported address and port strategy: ", c.AddressPortStrategy)
}
var happyEyeballs = &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, PrioritizeIpv6: false, TryDelayMs: 250, MaxConcurrentTry: 4}
if c.HappyEyeballsSettings != nil {
happyEyeballs.Enabled = c.HappyEyeballsSettings.Enabled
happyEyeballs.PrioritizeIpv6 = c.HappyEyeballsSettings.PrioritizeIPv6
if c.HappyEyeballsSettings.Interleave > 0 {
happyEyeballs.Interleave = c.HappyEyeballsSettings.Interleave
}
if c.HappyEyeballsSettings.TryDelayMs > 0 {
happyEyeballs.TryDelayMs = c.HappyEyeballsSettings.TryDelayMs
}
if c.HappyEyeballsSettings.MaxConcurrentTry > 0 {
happyEyeballs.MaxConcurrentTry = c.HappyEyeballsSettings.MaxConcurrentTry
}
}
return &internet.SocketConfig{
Mark: c.Mark,
Tfo: tfo,
@ -828,6 +852,7 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
TcpMptcp: c.TcpMptcp,
CustomSockopt: customSockopts,
AddressPortStrategy: addressPortStrategy,
HappyEyeballs: happyEyeballs,
}, nil
}

31
infra/conf/transport_test.go
View File

@ -26,6 +26,7 @@ func TestSocketConfig(t *testing.T) {
Tfo: 256,
DomainStrategy: internet.DomainStrategy_USE_IP,
DialerProxy: "tag",
HappyEyeballs: &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, TryDelayMs: 250, PrioritizeIpv6: false, MaxConcurrentTry: 4},
}
runMultiTestCase(t, []TestCase{
{
@ -45,8 +46,9 @@ func TestSocketConfig(t *testing.T) {
// test "tcpFastOpen": false, disabled TFO is expected
expectedOutput = &internet.SocketConfig{
Mark: 0,
Tfo: -1,
Mark: 0,
Tfo: -1,
HappyEyeballs: &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, TryDelayMs: 250, PrioritizeIpv6: false, MaxConcurrentTry: 4},
}
runMultiTestCase(t, []TestCase{
{
@ -63,8 +65,9 @@ func TestSocketConfig(t *testing.T) {
// test "tcpFastOpen": 65535, queue length 65535 is expected
expectedOutput = &internet.SocketConfig{
Mark: 0,
Tfo: 65535,
Mark: 0,
Tfo: 65535,
HappyEyeballs: &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, TryDelayMs: 250, PrioritizeIpv6: false, MaxConcurrentTry: 4},
}
runMultiTestCase(t, []TestCase{
{
@ -81,8 +84,9 @@ func TestSocketConfig(t *testing.T) {
// test "tcpFastOpen": -65535, disable TFO is expected
expectedOutput = &internet.SocketConfig{
Mark: 0,
Tfo: -65535,
Mark: 0,
Tfo: -65535,
HappyEyeballs: &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, TryDelayMs: 250, PrioritizeIpv6: false, MaxConcurrentTry: 4},
}
runMultiTestCase(t, []TestCase{
{
@ -99,8 +103,9 @@ func TestSocketConfig(t *testing.T) {
// test "tcpFastOpen": 0, no operation is expected
expectedOutput = &internet.SocketConfig{
Mark: 0,
Tfo: 0,
Mark: 0,
Tfo: 0,
HappyEyeballs: &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, TryDelayMs: 250, PrioritizeIpv6: false, MaxConcurrentTry: 4},
}
runMultiTestCase(t, []TestCase{
{
@ -117,8 +122,9 @@ func TestSocketConfig(t *testing.T) {
// test omit "tcpFastOpen", no operation is expected
expectedOutput = &internet.SocketConfig{
Mark: 0,
Tfo: 0,
Mark: 0,
Tfo: 0,
HappyEyeballs: &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, TryDelayMs: 250, PrioritizeIpv6: false, MaxConcurrentTry: 4},
}
runMultiTestCase(t, []TestCase{
{
@ -133,8 +139,9 @@ func TestSocketConfig(t *testing.T) {
// test "tcpFastOpen": null, no operation is expected
expectedOutput = &internet.SocketConfig{
Mark: 0,
Tfo: 0,
Mark: 0,
Tfo: 0,
HappyEyeballs: &internet.HappyEyeballsConfig{Enabled: true, Interleave: 1, TryDelayMs: 250, PrioritizeIpv6: false, MaxConcurrentTry: 4},
}
runMultiTestCase(t, []TestCase{
{

241
transport/internet/config.pb.go
View File

@ -511,24 +511,25 @@ type SocketConfig struct {
Tproxy SocketConfig_TProxyMode `protobuf:"varint,3,opt,name=tproxy,proto3,enum=xray.transport.internet.SocketConfig_TProxyMode" json:"tproxy,omitempty"`
// ReceiveOriginalDestAddress is for enabling IP_RECVORIGDSTADDR socket
// option. This option is for UDP only.
ReceiveOriginalDestAddress bool `protobuf:"varint,4,opt,name=receive_original_dest_address,json=receiveOriginalDestAddress,proto3" json:"receive_original_dest_address,omitempty"`
BindAddress []byte `protobuf:"bytes,5,opt,name=bind_address,json=bindAddress,proto3" json:"bind_address,omitempty"`
BindPort uint32 `protobuf:"varint,6,opt,name=bind_port,json=bindPort,proto3" json:"bind_port,omitempty"`
AcceptProxyProtocol bool `protobuf:"varint,7,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
DomainStrategy DomainStrategy `protobuf:"varint,8,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.transport.internet.DomainStrategy" json:"domain_strategy,omitempty"`
DialerProxy string `protobuf:"bytes,9,opt,name=dialer_proxy,json=dialerProxy,proto3" json:"dialer_proxy,omitempty"`
TcpKeepAliveInterval int32 `protobuf:"varint,10,opt,name=tcp_keep_alive_interval,json=tcpKeepAliveInterval,proto3" json:"tcp_keep_alive_interval,omitempty"`
TcpKeepAliveIdle int32 `protobuf:"varint,11,opt,name=tcp_keep_alive_idle,json=tcpKeepAliveIdle,proto3" json:"tcp_keep_alive_idle,omitempty"`
TcpCongestion string `protobuf:"bytes,12,opt,name=tcp_congestion,json=tcpCongestion,proto3" json:"tcp_congestion,omitempty"`
Interface string `protobuf:"bytes,13,opt,name=interface,proto3" json:"interface,omitempty"`
V6Only bool `protobuf:"varint,14,opt,name=v6only,proto3" json:"v6only,omitempty"`
TcpWindowClamp int32 `protobuf:"varint,15,opt,name=tcp_window_clamp,json=tcpWindowClamp,proto3" json:"tcp_window_clamp,omitempty"`
TcpUserTimeout int32 `protobuf:"varint,16,opt,name=tcp_user_timeout,json=tcpUserTimeout,proto3" json:"tcp_user_timeout,omitempty"`
TcpMaxSeg int32 `protobuf:"varint,17,opt,name=tcp_max_seg,json=tcpMaxSeg,proto3" json:"tcp_max_seg,omitempty"`
Penetrate bool `protobuf:"varint,18,opt,name=penetrate,proto3" json:"penetrate,omitempty"`
TcpMptcp bool `protobuf:"varint,19,opt,name=tcp_mptcp,json=tcpMptcp,proto3" json:"tcp_mptcp,omitempty"`
CustomSockopt []*CustomSockopt `protobuf:"bytes,20,rep,name=customSockopt,proto3" json:"customSockopt,omitempty"`
AddressPortStrategy AddressPortStrategy `protobuf:"varint,21,opt,name=address_port_strategy,json=addressPortStrategy,proto3,enum=xray.transport.internet.AddressPortStrategy" json:"address_port_strategy,omitempty"`
ReceiveOriginalDestAddress bool `protobuf:"varint,4,opt,name=receive_original_dest_address,json=receiveOriginalDestAddress,proto3" json:"receive_original_dest_address,omitempty"`
BindAddress []byte `protobuf:"bytes,5,opt,name=bind_address,json=bindAddress,proto3" json:"bind_address,omitempty"`
BindPort uint32 `protobuf:"varint,6,opt,name=bind_port,json=bindPort,proto3" json:"bind_port,omitempty"`
AcceptProxyProtocol bool `protobuf:"varint,7,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
DomainStrategy DomainStrategy `protobuf:"varint,8,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.transport.internet.DomainStrategy" json:"domain_strategy,omitempty"`
DialerProxy string `protobuf:"bytes,9,opt,name=dialer_proxy,json=dialerProxy,proto3" json:"dialer_proxy,omitempty"`
TcpKeepAliveInterval int32 `protobuf:"varint,10,opt,name=tcp_keep_alive_interval,json=tcpKeepAliveInterval,proto3" json:"tcp_keep_alive_interval,omitempty"`
TcpKeepAliveIdle int32 `protobuf:"varint,11,opt,name=tcp_keep_alive_idle,json=tcpKeepAliveIdle,proto3" json:"tcp_keep_alive_idle,omitempty"`
TcpCongestion string `protobuf:"bytes,12,opt,name=tcp_congestion,json=tcpCongestion,proto3" json:"tcp_congestion,omitempty"`
Interface string `protobuf:"bytes,13,opt,name=interface,proto3" json:"interface,omitempty"`
V6Only bool `protobuf:"varint,14,opt,name=v6only,proto3" json:"v6only,omitempty"`
TcpWindowClamp int32 `protobuf:"varint,15,opt,name=tcp_window_clamp,json=tcpWindowClamp,proto3" json:"tcp_window_clamp,omitempty"`
TcpUserTimeout int32 `protobuf:"varint,16,opt,name=tcp_user_timeout,json=tcpUserTimeout,proto3" json:"tcp_user_timeout,omitempty"`
TcpMaxSeg int32 `protobuf:"varint,17,opt,name=tcp_max_seg,json=tcpMaxSeg,proto3" json:"tcp_max_seg,omitempty"`
Penetrate bool `protobuf:"varint,18,opt,name=penetrate,proto3" json:"penetrate,omitempty"`
TcpMptcp bool `protobuf:"varint,19,opt,name=tcp_mptcp,json=tcpMptcp,proto3" json:"tcp_mptcp,omitempty"`
CustomSockopt []*CustomSockopt `protobuf:"bytes,20,rep,name=customSockopt,proto3" json:"customSockopt,omitempty"`
AddressPortStrategy AddressPortStrategy `protobuf:"varint,21,opt,name=address_port_strategy,json=addressPortStrategy,proto3,enum=xray.transport.internet.AddressPortStrategy" json:"address_port_strategy,omitempty"`
HappyEyeballs *HappyEyeballsConfig `protobuf:"bytes,22,opt,name=happy_eyeballs,json=happyEyeballs,proto3" json:"happy_eyeballs,omitempty"`
}
func (x *SocketConfig) Reset() {
@ -708,6 +709,90 @@ func (x *SocketConfig) GetAddressPortStrategy() AddressPortStrategy {
return AddressPortStrategy_None
}
func (x *SocketConfig) GetHappyEyeballs() *HappyEyeballsConfig {
if x != nil {
return x.HappyEyeballs
}
return nil
}
type HappyEyeballsConfig struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Enabled bool `protobuf:"varint,1,opt,name=enabled,proto3" json:"enabled,omitempty"`
PrioritizeIpv6 bool `protobuf:"varint,2,opt,name=prioritize_ipv6,json=prioritizeIpv6,proto3" json:"prioritize_ipv6,omitempty"`
Interleave uint32 `protobuf:"varint,3,opt,name=interleave,proto3" json:"interleave,omitempty"`
TryDelayMs uint64 `protobuf:"varint,4,opt,name=try_delayMs,json=tryDelayMs,proto3" json:"try_delayMs,omitempty"`
MaxConcurrentTry uint32 `protobuf:"varint,5,opt,name=max_concurrent_try,json=maxConcurrentTry,proto3" json:"max_concurrent_try,omitempty"`
}
func (x *HappyEyeballsConfig) Reset() {
*x = HappyEyeballsConfig{}
mi := &file_transport_internet_config_proto_msgTypes[5]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *HappyEyeballsConfig) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*HappyEyeballsConfig) ProtoMessage() {}
func (x *HappyEyeballsConfig) ProtoReflect() protoreflect.Message {
mi := &file_transport_internet_config_proto_msgTypes[5]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use HappyEyeballsConfig.ProtoReflect.Descriptor instead.
func (*HappyEyeballsConfig) Descriptor() ([]byte, []int) {
return file_transport_internet_config_proto_rawDescGZIP(), []int{5}
}
func (x *HappyEyeballsConfig) GetEnabled() bool {
if x != nil {
return x.Enabled
}
return false
}
func (x *HappyEyeballsConfig) GetPrioritizeIpv6() bool {
if x != nil {
return x.PrioritizeIpv6
}
return false
}
func (x *HappyEyeballsConfig) GetInterleave() uint32 {
if x != nil {
return x.Interleave
}
return 0
}
func (x *HappyEyeballsConfig) GetTryDelayMs() uint64 {
if x != nil {
return x.TryDelayMs
}
return 0
}
func (x *HappyEyeballsConfig) GetMaxConcurrentTry() uint32 {
if x != nil {
return x.MaxConcurrentTry
}
return 0
}
var File_transport_internet_config_proto protoreflect.FileDescriptor
var file_transport_internet_config_proto_rawDesc = []byte{
@ -766,7 +851,7 @@ var file_transport_internet_config_proto_rawDesc = []byte{
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@ -827,37 +912,55 @@ var file_transport_internet_config_proto_rawDesc = []byte{
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}
var (
@ -873,7 +976,7 @@ func file_transport_internet_config_proto_rawDescGZIP() []byte {
}
var file_transport_internet_config_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
var file_transport_internet_config_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
var file_transport_internet_config_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
var file_transport_internet_config_proto_goTypes = []any{
(DomainStrategy)(0), // 0: xray.transport.internet.DomainStrategy
(AddressPortStrategy)(0), // 1: xray.transport.internet.AddressPortStrategy
@ -883,24 +986,26 @@ var file_transport_internet_config_proto_goTypes = []any{
(*ProxyConfig)(nil), // 5: xray.transport.internet.ProxyConfig
(*CustomSockopt)(nil), // 6: xray.transport.internet.CustomSockopt
(*SocketConfig)(nil), // 7: xray.transport.internet.SocketConfig
(*serial.TypedMessage)(nil), // 8: xray.common.serial.TypedMessage
(*net.IPOrDomain)(nil), // 9: xray.common.net.IPOrDomain
(*HappyEyeballsConfig)(nil), // 8: xray.transport.internet.HappyEyeballsConfig
(*serial.TypedMessage)(nil), // 9: xray.common.serial.TypedMessage
(*net.IPOrDomain)(nil), // 10: xray.common.net.IPOrDomain
}
var file_transport_internet_config_proto_depIdxs = []int32{
8, // 0: xray.transport.internet.TransportConfig.settings:type_name -> xray.common.serial.TypedMessage
9, // 1: xray.transport.internet.StreamConfig.address:type_name -> xray.common.net.IPOrDomain
3, // 2: xray.transport.internet.StreamConfig.transport_settings:type_name -> xray.transport.internet.TransportConfig
8, // 3: xray.transport.internet.StreamConfig.security_settings:type_name -> xray.common.serial.TypedMessage
7, // 4: xray.transport.internet.StreamConfig.socket_settings:type_name -> xray.transport.internet.SocketConfig
2, // 5: xray.transport.internet.SocketConfig.tproxy:type_name -> xray.transport.internet.SocketConfig.TProxyMode
0, // 6: xray.transport.internet.SocketConfig.domain_strategy:type_name -> xray.transport.internet.DomainStrategy
6, // 7: xray.transport.internet.SocketConfig.customSockopt:type_name -> xray.transport.internet.CustomSockopt
1, // 8: xray.transport.internet.SocketConfig.address_port_strategy:type_name -> xray.transport.internet.AddressPortStrategy
9, // [9:9] is the sub-list for method output_type
9, // [9:9] is the sub-list for method input_type
9, // [9:9] is the sub-list for extension type_name
9, // [9:9] is the sub-list for extension extendee
0, // [0:9] is the sub-list for field type_name
9, // 0: xray.transport.internet.TransportConfig.settings:type_name -> xray.common.serial.TypedMessage
10, // 1: xray.transport.internet.StreamConfig.address:type_name -> xray.common.net.IPOrDomain
3, // 2: xray.transport.internet.StreamConfig.transport_settings:type_name -> xray.transport.internet.TransportConfig
9, // 3: xray.transport.internet.StreamConfig.security_settings:type_name -> xray.common.serial.TypedMessage
7, // 4: xray.transport.internet.StreamConfig.socket_settings:type_name -> xray.transport.internet.SocketConfig
2, // 5: xray.transport.internet.SocketConfig.tproxy:type_name -> xray.transport.internet.SocketConfig.TProxyMode
0, // 6: xray.transport.internet.SocketConfig.domain_strategy:type_name -> xray.transport.internet.DomainStrategy
6, // 7: xray.transport.internet.SocketConfig.customSockopt:type_name -> xray.transport.internet.CustomSockopt
1, // 8: xray.transport.internet.SocketConfig.address_port_strategy:type_name -> xray.transport.internet.AddressPortStrategy
8, // 9: xray.transport.internet.SocketConfig.happy_eyeballs:type_name -> xray.transport.internet.HappyEyeballsConfig
10, // [10:10] is the sub-list for method output_type
10, // [10:10] is the sub-list for method input_type
10, // [10:10] is the sub-list for extension type_name
10, // [10:10] is the sub-list for extension extendee
0, // [0:10] is the sub-list for field type_name
}
func init() { file_transport_internet_config_proto_init() }
@ -914,7 +1019,7 @@ func file_transport_internet_config_proto_init() {
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_transport_internet_config_proto_rawDesc,
NumEnums: 3,
NumMessages: 5,
NumMessages: 6,
NumExtensions: 0,
NumServices: 0,
},

10
transport/internet/config.proto
View File

@ -130,4 +130,14 @@ message SocketConfig {
repeated CustomSockopt customSockopt = 20;
AddressPortStrategy address_port_strategy = 21;
HappyEyeballsConfig happy_eyeballs = 22;
}
message HappyEyeballsConfig {
bool enabled = 1;
bool prioritize_ipv6 = 2;
uint32 interleave = 3;
uint64 try_delayMs = 4;
uint32 max_concurrent_try = 5;
}

4
transport/internet/dialer.go
View File

@ -255,9 +255,11 @@ func DialSystem(ctx context.Context, dest net.Destination, sockopt *SocketConfig
if sockopt.DomainStrategy.forceIP() {
return nil, err
}
} else {
} else if !sockopt.HappyEyeballs.Enabled || len(ips) < 2 || len(sockopt.DialerProxy) > 0 || dest.Network != net.Network_TCP {
dest.Address = net.IPAddress(ips[dice.Roll(len(ips))])
errors.LogInfo(ctx, "replace destination with "+dest.String())
} else {
return TcpRaceDial(ctx, src, ips, dest.Port, sockopt)
}
}

165
transport/internet/happy_eyeballs.go Normal file
View File

@ -0,0 +1,165 @@
package internet
import (
"context"
"github.com/xtls/xray-core/common/net"
"time"
)
type result struct {
err error
conn net.Conn
index int
}
func TcpRaceDial(ctx context.Context, src net.Address, ips []net.IP, port net.Port, sockopt *SocketConfig) (net.Conn, error) {
if len(ips) < 2 {
panic("at least 2 ips is required to race dial")
}
ips = sortIPs(ips, sockopt.HappyEyeballs.PrioritizeIpv6, sockopt.HappyEyeballs.Interleave)
newCtx, cancel := context.WithCancel(ctx)
defer cancel()
var resultCh = make(chan *result, len(ips))
nextTryIndex := 0
activeNum := uint32(0)
timer := time.NewTimer(0)
var winConn net.Conn
for {
select {
case r := <-resultCh:
activeNum--
select {
case <-ctx.Done():
cancel()
timer.Stop()
if winConn != nil {
winConn.Close()
}
if r.conn != nil {
r.conn.Close()
}
if activeNum == 0 {
return nil, ctx.Err()
}
continue
default:
if r.conn != nil {
cancel()
timer.Stop()
if winConn == nil {
winConn = r.conn
} else {
r.conn.Close()
}
}
if winConn != nil && activeNum == 0 {
return winConn, nil
}
if winConn != nil {
continue
}
if nextTryIndex < len(ips) {
timer.Reset(0)
continue
}
if activeNum == 0 {
return nil, r.err
}
timer.Stop()
continue
}
case <-timer.C:
if nextTryIndex == len(ips) || activeNum == sockopt.HappyEyeballs.MaxConcurrentTry {
panic("impossible situation")
}
go tcpTryDial(newCtx, src, sockopt, ips[nextTryIndex], port, nextTryIndex, resultCh)
activeNum++
nextTryIndex++
if nextTryIndex == len(ips) || activeNum == sockopt.HappyEyeballs.MaxConcurrentTry {
timer.Stop()
} else {
timer.Reset(time.Duration(sockopt.HappyEyeballs.TryDelayMs) * time.Millisecond)
}
continue
}
}
}
// sortIPs sort IPs according to rfc 8305.
func sortIPs(ips []net.IP, priorIPv6 bool, interleave uint32) []net.IP {
if len(ips) == 0 {
return ips
}
var ip4 = make([]net.IP, 0, len(ips))
var ip6 = make([]net.IP, 0, len(ips))
for _, ip := range ips {
parsedIp := net.IPAddress(ip).IP()
if len(parsedIp) == net.IPv4len {
ip4 = append(ip4, parsedIp)
} else {
ip6 = append(ip6, parsedIp)
}
}
if len(ip4) == 0 || len(ip6) == 0 {
return ips
}
var newIPs = make([]net.IP, 0, len(ips))
consumeIP4 := 0
consumeIP6 := 0
consumeTurn := uint32(0)
ip4turn := true
if priorIPv6 {
ip4turn = false
}
for {
if ip4turn {
newIPs = append(newIPs, ip4[consumeIP4])
consumeIP4++
if consumeIP4 == len(ip4) {
newIPs = append(newIPs, ip6[consumeIP6:]...)
break
}
consumeTurn++
if consumeTurn == interleave {
ip4turn = false
consumeTurn = uint32(0)
}
} else {
newIPs = append(newIPs, ip6[consumeIP6])
consumeIP6++
if consumeIP6 == len(ip6) {
newIPs = append(newIPs, ip4[consumeIP4:]...)
break
}
consumeTurn++
if consumeTurn == interleave {
ip4turn = true
consumeTurn = uint32(0)
}
}
}
return newIPs
}
func tcpTryDial(ctx context.Context, src net.Address, sockopt *SocketConfig, ip net.IP, port net.Port, index int, resultCh chan<- *result) {
conn, err := effectiveSystemDialer.Dial(ctx, src, net.Destination{Address: net.IPAddress(ip), Network: net.Network_TCP, Port: port}, sockopt)
select {
case <-ctx.Done():
if conn != nil {
conn.Close()
}
resultCh <- &result{err: ctx.Err(), index: index}
return
default:
if err != nil {
resultCh <- &result{err: err, index: index}
return
}
resultCh <- &result{conn: conn, index: index}
return
}
}