black-internet-days-ahead/Xray-core
1
0
Fork 0
mirror of https://github.com/XTLS/Xray-core.git synced 2024-11-28 19:41:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

Wireguard resolve strategy (#2717)

Browse source 
* 增加 wireguard 出站选项 `resolveStrategy`.

* They become a part of you.

* 移除不必要的选项别名.

* aliases NG.

* 微调.

---------

Co-authored-by: rui0572 <125641819+rui0572@users.noreply.github.com>
This commit is contained in:
yuhan6665 2023-11-12 15:52:09 -05:00 committed by GitHub
parent cc4b28b159
commit a109389efb
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
6 changed files with 175 additions and 35 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

29
infra/conf/wireguard.go
View file

@ -3,6 +3,7 @@ package conf
import ( import (
"encoding/base64" "encoding/base64"
"encoding/hex" "encoding/hex"
"strings"
"github.com/xtls/xray-core/proxy/wireguard" "github.com/xtls/xray-core/proxy/wireguard"
"google.golang.org/protobuf/proto" "google.golang.org/protobuf/proto"
@ -47,12 +48,13 @@ func (c *WireGuardPeerConfig) Build() (proto.Message, error) {
} }
type WireGuardConfig struct { type WireGuardConfig struct {
SecretKey string `json:"secretKey"` SecretKey string `json:"secretKey"`
Address []string `json:"address"` Address []string `json:"address"`
Peers []*WireGuardPeerConfig `json:"peers"` Peers []*WireGuardPeerConfig `json:"peers"`
MTU int `json:"mtu"` MTU int `json:"mtu"`
NumWorkers int `json:"workers"` NumWorkers int `json:"workers"`
Reserved []byte `json:"reserved"` Reserved []byte `json:"reserved"`
DomainStrategy string `json:"domainStrategy"`
} }
func (c *WireGuardConfig) Build() (proto.Message, error) { func (c *WireGuardConfig) Build() (proto.Message, error) {
@ -96,6 +98,21 @@ func (c *WireGuardConfig) Build() (proto.Message, error) {
} }
config.Reserved = c.Reserved config.Reserved = c.Reserved
switch strings.ToLower(c.DomainStrategy) {
case "forceip", "":
config.DomainStrategy = wireguard.DeviceConfig_FORCE_IP
case "forceipv4":
config.DomainStrategy = wireguard.DeviceConfig_FORCE_IP4
case "forceipv6":
config.DomainStrategy = wireguard.DeviceConfig_FORCE_IP6
case "forceipv4v6":
config.DomainStrategy = wireguard.DeviceConfig_FORCE_IP46
case "forceipv6v4":
config.DomainStrategy = wireguard.DeviceConfig_FORCE_IP64
default:
return nil, newError("unsupported domain strategy: ", c.DomainStrategy)
}
return config, nil return config, nil
} }

8
infra/conf/wireguard_test.go
View file

@ -24,7 +24,8 @@ func TestWireGuardOutbound(t *testing.T) {
} }
], ],
"mtu": 1300, "mtu": 1300,
"workers": 2 "workers": 2,
"domainStrategy": "ForceIPv6v4"
}`, }`,
Parser: loadJSON(creator), Parser: loadJSON(creator),
Output: &wireguard.DeviceConfig{ Output: &wireguard.DeviceConfig{
@ -41,8 +42,9 @@ func TestWireGuardOutbound(t *testing.T) {
AllowedIps: []string{"0.0.0.0/0", "::0/0"}, AllowedIps: []string{"0.0.0.0/0", "::0/0"},
}, },
}, },
Mtu: 1300, Mtu: 1300,
NumWorkers: 2, NumWorkers: 2,
DomainStrategy: wireguard.DeviceConfig_FORCE_IP64,
}, },
}, },
}) })

25
proxy/wireguard/config.go Normal file
View file

@ -0,0 +1,25 @@
package wireguard
func (c *DeviceConfig) preferIP4() bool {
return c.DomainStrategy == DeviceConfig_FORCE_IP ||
c.DomainStrategy == DeviceConfig_FORCE_IP4 ||
c.DomainStrategy == DeviceConfig_FORCE_IP46
}
func (c *DeviceConfig) preferIP6() bool {
return c.DomainStrategy == DeviceConfig_FORCE_IP ||
c.DomainStrategy == DeviceConfig_FORCE_IP6 ||
c.DomainStrategy == DeviceConfig_FORCE_IP64
}
func (c *DeviceConfig) hasFallback() bool {
return c.DomainStrategy == DeviceConfig_FORCE_IP46 || c.DomainStrategy == DeviceConfig_FORCE_IP64
}
func (c *DeviceConfig) fallbackIP4() bool {
return c.DomainStrategy == DeviceConfig_FORCE_IP64
}
func (c *DeviceConfig) fallbackIP6() bool {
return c.DomainStrategy == DeviceConfig_FORCE_IP46
}

125
proxy/wireguard/config.pb.go
View file

@ -20,6 +20,61 @@ const (
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20) _ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
) )
type DeviceConfig_DomainStrategy int32
const (
DeviceConfig_FORCE_IP DeviceConfig_DomainStrategy = 0
DeviceConfig_FORCE_IP4 DeviceConfig_DomainStrategy = 1
DeviceConfig_FORCE_IP6 DeviceConfig_DomainStrategy = 2
DeviceConfig_FORCE_IP46 DeviceConfig_DomainStrategy = 3
DeviceConfig_FORCE_IP64 DeviceConfig_DomainStrategy = 4
)
// Enum value maps for DeviceConfig_DomainStrategy.
var (
DeviceConfig_DomainStrategy_name = map[int32]string{
0: "FORCE_IP",
1: "FORCE_IP4",
2: "FORCE_IP6",
3: "FORCE_IP46",
4: "FORCE_IP64",
}
DeviceConfig_DomainStrategy_value = map[string]int32{
"FORCE_IP": 0,
"FORCE_IP4": 1,
"FORCE_IP6": 2,
"FORCE_IP46": 3,
"FORCE_IP64": 4,
}
)
func (x DeviceConfig_DomainStrategy) Enum() *DeviceConfig_DomainStrategy {
p := new(DeviceConfig_DomainStrategy)
*p = x
return p
}
func (x DeviceConfig_DomainStrategy) String() string {
return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
}
func (DeviceConfig_DomainStrategy) Descriptor() protoreflect.EnumDescriptor {
return file_proxy_wireguard_config_proto_enumTypes[0].Descriptor()
}
func (DeviceConfig_DomainStrategy) Type() protoreflect.EnumType {
return &file_proxy_wireguard_config_proto_enumTypes[0]
}
func (x DeviceConfig_DomainStrategy) Number() protoreflect.EnumNumber {
return protoreflect.EnumNumber(x)
}
// Deprecated: Use DeviceConfig_DomainStrategy.Descriptor instead.
func (DeviceConfig_DomainStrategy) EnumDescriptor() ([]byte, []int) {
return file_proxy_wireguard_config_proto_rawDescGZIP(), []int{1, 0}
}
type PeerConfig struct { type PeerConfig struct {
state protoimpl.MessageState state protoimpl.MessageState
sizeCache protoimpl.SizeCache sizeCache protoimpl.SizeCache
@ -104,12 +159,13 @@ type DeviceConfig struct {
sizeCache protoimpl.SizeCache sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields unknownFields protoimpl.UnknownFields
SecretKey string `protobuf:"bytes,1,opt,name=secret_key,json=secretKey,proto3" json:"secret_key,omitempty"` SecretKey string `protobuf:"bytes,1,opt,name=secret_key,json=secretKey,proto3" json:"secret_key,omitempty"`
Endpoint []string `protobuf:"bytes,2,rep,name=endpoint,proto3" json:"endpoint,omitempty"` Endpoint []string `protobuf:"bytes,2,rep,name=endpoint,proto3" json:"endpoint,omitempty"`
Peers []*PeerConfig `protobuf:"bytes,3,rep,name=peers,proto3" json:"peers,omitempty"` Peers []*PeerConfig `protobuf:"bytes,3,rep,name=peers,proto3" json:"peers,omitempty"`
Mtu int32 `protobuf:"varint,4,opt,name=mtu,proto3" json:"mtu,omitempty"` Mtu int32 `protobuf:"varint,4,opt,name=mtu,proto3" json:"mtu,omitempty"`
NumWorkers int32 `protobuf:"varint,5,opt,name=num_workers,json=numWorkers,proto3" json:"num_workers,omitempty"` NumWorkers int32 `protobuf:"varint,5,opt,name=num_workers,json=numWorkers,proto3" json:"num_workers,omitempty"`
Reserved []byte `protobuf:"bytes,6,opt,name=reserved,proto3" json:"reserved,omitempty"` Reserved []byte `protobuf:"bytes,6,opt,name=reserved,proto3" json:"reserved,omitempty"`
DomainStrategy DeviceConfig_DomainStrategy `protobuf:"varint,7,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.proxy.wireguard.DeviceConfig_DomainStrategy" json:"domain_strategy,omitempty"`
} }
func (x *DeviceConfig) Reset() { func (x *DeviceConfig) Reset() {
@ -186,6 +242,13 @@ func (x *DeviceConfig) GetReserved() []byte {
return nil return nil
} }
func (x *DeviceConfig) GetDomainStrategy() DeviceConfig_DomainStrategy {
if x != nil {
return x.DomainStrategy
}
return DeviceConfig_FORCE_IP
}
var File_proxy_wireguard_config_proto protoreflect.FileDescriptor var File_proxy_wireguard_config_proto protoreflect.FileDescriptor
var file_proxy_wireguard_config_proto_rawDesc = []byte{ var file_proxy_wireguard_config_proto_rawDesc = []byte{
@ -203,7 +266,7 @@ var file_proxy_wireguard_config_proto_rawDesc = []byte{
0x76, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x6b, 0x65, 0x65, 0x70, 0x41, 0x6c, 0x76, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x6b, 0x65, 0x65, 0x70, 0x41, 0x6c,
0x69, 0x76, 0x65, 0x12, 0x1f, 0x0a, 0x0b, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x65, 0x64, 0x5f, 0x69, 0x69, 0x76, 0x65, 0x12, 0x1f, 0x0a, 0x0b, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x65, 0x64, 0x5f, 0x69,
0x70, 0x73, 0x18, 0x05, 0x20, 0x03, 0x28, 0x09, 0x52, 0x0a, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x65, 0x70, 0x73, 0x18, 0x05, 0x20, 0x03, 0x28, 0x09, 0x52, 0x0a, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x65,
0x64, 0x49, 0x70, 0x73, 0x22, 0xd0, 0x01, 0x0a, 0x0c, 0x44, 0x65, 0x76, 0x69, 0x63, 0x65, 0x43, 0x64, 0x49, 0x70, 0x73, 0x22, 0x8a, 0x03, 0x0a, 0x0c, 0x44, 0x65, 0x76, 0x69, 0x63, 0x65, 0x43,
0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x1d, 0x0a, 0x0a, 0x73, 0x65, 0x63, 0x72, 0x65, 0x74, 0x5f, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x1d, 0x0a, 0x0a, 0x73, 0x65, 0x63, 0x72, 0x65, 0x74, 0x5f,
0x6b, 0x65, 0x79, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x09, 0x73, 0x65, 0x63, 0x72, 0x65, 0x6b, 0x65, 0x79, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x09, 0x73, 0x65, 0x63, 0x72, 0x65,
0x74, 0x4b, 0x65, 0x79, 0x12, 0x1a, 0x0a, 0x08, 0x65, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x74, 0x4b, 0x65, 0x79, 0x12, 0x1a, 0x0a, 0x08, 0x65, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74,
@ -216,13 +279,25 @@ var file_proxy_wireguard_config_proto_rawDesc = []byte{
0x6d, 0x5f, 0x77, 0x6f, 0x72, 0x6b, 0x65, 0x72, 0x73, 0x18, 0x05, 0x20, 0x01, 0x28, 0x05, 0x52, 0x6d, 0x5f, 0x77, 0x6f, 0x72, 0x6b, 0x65, 0x72, 0x73, 0x18, 0x05, 0x20, 0x01, 0x28, 0x05, 0x52,
0x0a, 0x6e, 0x75, 0x6d, 0x57, 0x6f, 0x72, 0x6b, 0x65, 0x72, 0x73, 0x12, 0x1a, 0x0a, 0x08, 0x72, 0x0a, 0x6e, 0x75, 0x6d, 0x57, 0x6f, 0x72, 0x6b, 0x65, 0x72, 0x73, 0x12, 0x1a, 0x0a, 0x08, 0x72,
0x65, 0x73, 0x65, 0x72, 0x76, 0x65, 0x64, 0x18, 0x06, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x08, 0x72, 0x65, 0x73, 0x65, 0x72, 0x76, 0x65, 0x64, 0x18, 0x06, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x08, 0x72,
0x65, 0x73, 0x65, 0x72, 0x76, 0x65, 0x64, 0x42, 0x5e, 0x0a, 0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x65, 0x73, 0x65, 0x72, 0x76, 0x65, 0x64, 0x12, 0x5a, 0x0a, 0x0f, 0x64, 0x6f, 0x6d, 0x61, 0x69,
0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x77, 0x69, 0x72, 0x65, 0x67, 0x75, 0x6e, 0x5f, 0x73, 0x74, 0x72, 0x61, 0x74, 0x65, 0x67, 0x79, 0x18, 0x07, 0x20, 0x01, 0x28, 0x0e,
0x61, 0x72, 0x64, 0x50, 0x01, 0x5a, 0x29, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x32, 0x31, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x77, 0x69,
0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x72, 0x65, 0x67, 0x75, 0x61, 0x72, 0x64, 0x2e, 0x44, 0x65, 0x76, 0x69, 0x63, 0x65, 0x43, 0x6f,
0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x77, 0x69, 0x72, 0x65, 0x67, 0x75, 0x61, 0x72, 0x64, 0x6e, 0x66, 0x69, 0x67, 0x2e, 0x44, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x53, 0x74, 0x72, 0x61, 0x74,
0xaa, 0x02, 0x14, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x57, 0x69, 0x65, 0x67, 0x79, 0x52, 0x0e, 0x64, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x53, 0x74, 0x72, 0x61, 0x74,
0x72, 0x65, 0x47, 0x75, 0x61, 0x72, 0x64, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33, 0x65, 0x67, 0x79, 0x22, 0x5c, 0x0a, 0x0e, 0x44, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x53, 0x74, 0x72,
0x61, 0x74, 0x65, 0x67, 0x79, 0x12, 0x0c, 0x0a, 0x08, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49,
0x50, 0x10, 0x00, 0x12, 0x0d, 0x0a, 0x09, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x34,
0x10, 0x01, 0x12, 0x0d, 0x0a, 0x09, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x36, 0x10,
0x02, 0x12, 0x0e, 0x0a, 0x0a, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x34, 0x36, 0x10,
0x03, 0x12, 0x0e, 0x0a, 0x0a, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x36, 0x34, 0x10,
0x04, 0x42, 0x5e, 0x0a, 0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72,
0x6f, 0x78, 0x79, 0x2e, 0x77, 0x69, 0x72, 0x65, 0x67, 0x75, 0x61, 0x72, 0x64, 0x50, 0x01, 0x5a,
0x29, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73,
0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79,
0x2f, 0x77, 0x69, 0x72, 0x65, 0x67, 0x75, 0x61, 0x72, 0x64, 0xaa, 0x02, 0x14, 0x58, 0x72, 0x61,
0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x57, 0x69, 0x72, 0x65, 0x47, 0x75, 0x61, 0x72,
0x64, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
} }
var ( var (
@ -237,18 +312,21 @@ func file_proxy_wireguard_config_proto_rawDescGZIP() []byte {
return file_proxy_wireguard_config_proto_rawDescData return file_proxy_wireguard_config_proto_rawDescData
} }
var file_proxy_wireguard_config_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
var file_proxy_wireguard_config_proto_msgTypes = make([]protoimpl.MessageInfo, 2) var file_proxy_wireguard_config_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_proxy_wireguard_config_proto_goTypes = []interface{}{ var file_proxy_wireguard_config_proto_goTypes = []interface{}{
(*PeerConfig)(nil), // 0: xray.proxy.wireguard.PeerConfig (DeviceConfig_DomainStrategy)(0), // 0: xray.proxy.wireguard.DeviceConfig.DomainStrategy
(*DeviceConfig)(nil), // 1: xray.proxy.wireguard.DeviceConfig (*PeerConfig)(nil), // 1: xray.proxy.wireguard.PeerConfig
(*DeviceConfig)(nil), // 2: xray.proxy.wireguard.DeviceConfig
} }
var file_proxy_wireguard_config_proto_depIdxs = []int32{ var file_proxy_wireguard_config_proto_depIdxs = []int32{
0, // 0: xray.proxy.wireguard.DeviceConfig.peers:type_name -> xray.proxy.wireguard.PeerConfig 1, // 0: xray.proxy.wireguard.DeviceConfig.peers:type_name -> xray.proxy.wireguard.PeerConfig
1, // [1:1] is the sub-list for method output_type 0, // 1: xray.proxy.wireguard.DeviceConfig.domain_strategy:type_name -> xray.proxy.wireguard.DeviceConfig.DomainStrategy
1, // [1:1] is the sub-list for method input_type 2, // [2:2] is the sub-list for method output_type
1, // [1:1] is the sub-list for extension type_name 2, // [2:2] is the sub-list for method input_type
1, // [1:1] is the sub-list for extension extendee 2, // [2:2] is the sub-list for extension type_name
0, // [0:1] is the sub-list for field type_name 2, // [2:2] is the sub-list for extension extendee
0, // [0:2] is the sub-list for field type_name
} }
func init() { file_proxy_wireguard_config_proto_init() } func init() { file_proxy_wireguard_config_proto_init() }
@ -287,13 +365,14 @@ func file_proxy_wireguard_config_proto_init() {
File: protoimpl.DescBuilder{ File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(), GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_proxy_wireguard_config_proto_rawDesc, RawDescriptor: file_proxy_wireguard_config_proto_rawDesc,
NumEnums: 0, NumEnums: 1,
NumMessages: 2, NumMessages: 2,
NumExtensions: 0, NumExtensions: 0,
NumServices: 0, NumServices: 0,
}, },
GoTypes: file_proxy_wireguard_config_proto_goTypes, GoTypes: file_proxy_wireguard_config_proto_goTypes,
DependencyIndexes: file_proxy_wireguard_config_proto_depIdxs, DependencyIndexes: file_proxy_wireguard_config_proto_depIdxs,
EnumInfos: file_proxy_wireguard_config_proto_enumTypes,
MessageInfos: file_proxy_wireguard_config_proto_msgTypes, MessageInfos: file_proxy_wireguard_config_proto_msgTypes,
}.Build() }.Build()
File_proxy_wireguard_config_proto = out.File File_proxy_wireguard_config_proto = out.File

8
proxy/wireguard/config.proto
View file

@ -15,10 +15,18 @@ message PeerConfig {
} }
message DeviceConfig { message DeviceConfig {
enum DomainStrategy {
FORCE_IP = 0;
FORCE_IP4 = 1;
FORCE_IP6 = 2;
FORCE_IP46 = 3;
FORCE_IP64 = 4;
}
string secret_key = 1; string secret_key = 1;
repeated string endpoint = 2; repeated string endpoint = 2;
repeated PeerConfig peers = 3; repeated PeerConfig peers = 3;
int32 mtu = 4; int32 mtu = 4;
int32 num_workers = 5; int32 num_workers = 5;
bytes reserved = 6; bytes reserved = 6;
DomainStrategy domain_strategy = 7;
} }

15
proxy/wireguard/wireguard.go
View file

@ -31,6 +31,7 @@ import (
"github.com/xtls/xray-core/common" "github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/buf" "github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/common/dice"
"github.com/xtls/xray-core/common/log" "github.com/xtls/xray-core/common/log"
"github.com/xtls/xray-core/common/net" "github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/protocol" "github.com/xtls/xray-core/common/protocol"
@ -159,15 +160,23 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
addr := destination.Address addr := destination.Address
if addr.Family().IsDomain() { if addr.Family().IsDomain() {
ips, err := h.dns.LookupIP(addr.Domain(), dns.IPOption{ ips, err := h.dns.LookupIP(addr.Domain(), dns.IPOption{
IPv4Enable: h.hasIPv4, IPv4Enable: h.hasIPv4 && h.conf.preferIP4(),
IPv6Enable: h.hasIPv6, IPv6Enable: h.hasIPv6 && h.conf.preferIP6(),
}) })
{ // Resolve fallback
if (len(ips) == 0 || err != nil) && h.conf.hasFallback() {
ips, err = h.dns.LookupIP(addr.Domain(), dns.IPOption{
IPv4Enable: h.hasIPv4 && h.conf.fallbackIP4(),
IPv6Enable: h.hasIPv6 && h.conf.fallbackIP6(),
})
}
}
if err != nil { if err != nil {
return newError("failed to lookup DNS").Base(err) return newError("failed to lookup DNS").Base(err)
} else if len(ips) == 0 { } else if len(ips) == 0 {
return dns.ErrEmptyResponse return dns.ErrEmptyResponse
} }
addr = net.IPAddress(ips[0]) addr = net.IPAddress(ips[dice.Roll(len(ips))])
} }
var newCtx context.Context var newCtx context.Context