Remove compatibility code

The minimum support go version is already 1.18

app/proxyman/outbound/uot.go

@@ -1,5 +1,3 @@
-//go:build go1.18
-
 package outbound
 
 import (

app/proxyman/outbound/uot_stub.go

@@ -1,15 +0,0 @@
-//go:build !go1.18
-
-package outbound
-
-import (
-	"context"
-	"os"
-
-	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/transport/internet/stat"
-)
-
-func (h *Handler) getUoTConnection(ctx context.Context, dest net.Destination) (stat.Connection, error) {
-	return nil, os.ErrInvalid
-}

common/protocol/quic/qtls_go116.go

@@ -1,19 +0,0 @@
-//go:build go1.16 && !go1.17
-// +build go1.16,!go1.17
-
-package quic
-
-import (
-	"crypto/cipher"
-
-	"github.com/marten-seemann/qtls-go1-16"
-)
-
-type (
-	// A CipherSuiteTLS13 is a cipher suite for TLS 1.3
-	CipherSuiteTLS13 = qtls.CipherSuiteTLS13
-)
-
-func AEADAESGCMTLS13(key, fixedNonce []byte) cipher.AEAD {
-	return qtls.AEADAESGCMTLS13(key, fixedNonce)
-}

common/protocol/quic/qtls_go117.go

@@ -1,19 +0,0 @@
-//go:build go1.17 && !go1.18
-// +build go1.17,!go1.18
-
-package quic
-
-import (
-	"crypto/cipher"
-
-	"github.com/marten-seemann/qtls-go1-17"
-)
-
-type (
-	// A CipherSuiteTLS13 is a cipher suite for TLS 1.3
-	CipherSuiteTLS13 = qtls.CipherSuiteTLS13
-)
-
-func AEADAESGCMTLS13(key, fixedNonce []byte) cipher.AEAD {
-	return qtls.AEADAESGCMTLS13(key, fixedNonce)
-}

common/protocol/quic/qtls_go118.go

@@ -1,6 +1,3 @@
-//go:build go1.18
-// +build go1.18
-
 package quic
 
 import (

infra/conf/shadowsocks.go

@@ -1,5 +1,3 @@
-//go:build go1.18
-
 package conf
 
 import (

infra/conf/shadowsocks_legacy.go

@@ -1,154 +0,0 @@
-//go:build !go1.18
-
-package conf
-
-import (
-	"strings"
-
-	"github.com/golang/protobuf/proto"
-	"github.com/xtls/xray-core/common/protocol"
-	"github.com/xtls/xray-core/common/serial"
-	"github.com/xtls/xray-core/proxy/shadowsocks"
-)
-
-func cipherFromString(c string) shadowsocks.CipherType {
-	switch strings.ToLower(c) {
-	case "aes-128-gcm", "aead_aes_128_gcm":
-		return shadowsocks.CipherType_AES_128_GCM
-	case "aes-256-gcm", "aead_aes_256_gcm":
-		return shadowsocks.CipherType_AES_256_GCM
-	case "chacha20-poly1305", "aead_chacha20_poly1305", "chacha20-ietf-poly1305":
-		return shadowsocks.CipherType_CHACHA20_POLY1305
-	case "xchacha20-poly1305", "aead_xchacha20_poly1305", "xchacha20-ietf-poly1305":
-		return shadowsocks.CipherType_XCHACHA20_POLY1305
-	case "none", "plain":
-		return shadowsocks.CipherType_NONE
-	default:
-		return shadowsocks.CipherType_UNKNOWN
-	}
-}
-
-type ShadowsocksUserConfig struct {
-	Cipher   string `json:"method"`
-	Password string `json:"password"`
-	Level    byte   `json:"level"`
-	Email    string `json:"email"`
-}
-
-type ShadowsocksServerConfig struct {
-	Cipher      string                   `json:"method"`
-	Password    string                   `json:"password"`
-	Level       byte                     `json:"level"`
-	Email       string                   `json:"email"`
-	Users       []*ShadowsocksUserConfig `json:"clients"`
-	NetworkList *NetworkList             `json:"network"`
-	IVCheck     bool                     `json:"ivCheck"`
-}
-
-func (v *ShadowsocksServerConfig) Build() (proto.Message, error) {
-	config := new(shadowsocks.ServerConfig)
-	config.Network = v.NetworkList.Build()
-
-	if v.Users != nil {
-		for _, user := range v.Users {
-			account := &shadowsocks.Account{
-				Password:   user.Password,
-				CipherType: cipherFromString(user.Cipher),
-				IvCheck:    v.IVCheck,
-			}
-			if account.Password == "" {
-				return nil, newError("Shadowsocks password is not specified.")
-			}
-			if account.CipherType < shadowsocks.CipherType_AES_128_GCM ||
-				account.CipherType > shadowsocks.CipherType_XCHACHA20_POLY1305 {
-				return nil, newError("unsupported cipher method: ", user.Cipher)
-			}
-			config.Users = append(config.Users, &protocol.User{
-				Email:   user.Email,
-				Level:   uint32(user.Level),
-				Account: serial.ToTypedMessage(account),
-			})
-		}
-	} else {
-		account := &shadowsocks.Account{
-			Password:   v.Password,
-			CipherType: cipherFromString(v.Cipher),
-			IvCheck:    v.IVCheck,
-		}
-		if account.Password == "" {
-			return nil, newError("Shadowsocks password is not specified.")
-		}
-		if account.CipherType == shadowsocks.CipherType_UNKNOWN {
-			return nil, newError("unknown cipher method: ", v.Cipher)
-		}
-		config.Users = append(config.Users, &protocol.User{
-			Email:   v.Email,
-			Level:   uint32(v.Level),
-			Account: serial.ToTypedMessage(account),
-		})
-	}
-
-	return config, nil
-}
-
-type ShadowsocksServerTarget struct {
-	Address  *Address `json:"address"`
-	Port     uint16   `json:"port"`
-	Cipher   string   `json:"method"`
-	Password string   `json:"password"`
-	Email    string   `json:"email"`
-	Level    byte     `json:"level"`
-	IVCheck  bool     `json:"ivCheck"`
-	UoT      bool     `json:"uot"`
-}
-
-type ShadowsocksClientConfig struct {
-	Servers []*ShadowsocksServerTarget `json:"servers"`
-}
-
-func (v *ShadowsocksClientConfig) Build() (proto.Message, error) {
-	if len(v.Servers) == 0 {
-		return nil, newError("0 Shadowsocks server configured.")
-	}
-
-	config := new(shadowsocks.ClientConfig)
-	serverSpecs := make([]*protocol.ServerEndpoint, len(v.Servers))
-	for idx, server := range v.Servers {
-		if server.Address == nil {
-			return nil, newError("Shadowsocks server address is not set.")
-		}
-		if server.Port == 0 {
-			return nil, newError("Invalid Shadowsocks port.")
-		}
-		if server.Password == "" {
-			return nil, newError("Shadowsocks password is not specified.")
-		}
-		account := &shadowsocks.Account{
-			Password: server.Password,
-		}
-		account.CipherType = cipherFromString(server.Cipher)
-		if account.CipherType == shadowsocks.CipherType_UNKNOWN {
-			return nil, newError("unknown cipher method: ", server.Cipher)
-		}
-
-		account.IvCheck = server.IVCheck
-
-		ss := &protocol.ServerEndpoint{
-			Address: server.Address.Build(),
-			Port:    uint32(server.Port),
-			User: []*protocol.User{
-				{
-					Level:   uint32(server.Level),
-					Email:   server.Email,
-					Account: serial.ToTypedMessage(account),
-				},
-			},
-		}
-
-		serverSpecs[idx] = ss
-	}
-
-	config.Server = serverSpecs
-
-	return config, nil
-}

proxy/shadowsocks_2022/inbound.go

@@ -1,5 +1,3 @@
-//go:build go1.18
-
 package shadowsocks_2022
 
 import (

proxy/shadowsocks_2022/inbound_multi.go

@@ -1,5 +1,3 @@
-//go:build go1.18
-
 package shadowsocks_2022
 
 import (

proxy/shadowsocks_2022/outbound.go

@@ -1,5 +1,3 @@
-//go:build go1.18
-
 package shadowsocks_2022
 
 import (

proxy/shadowsocks_2022/shadowsocks_2022.go

@@ -1,5 +1,3 @@
-//go:build go1.18
-
 package shadowsocks_2022
 
 import (