311 lines
9.2 KiB
Go
311 lines
9.2 KiB
Go
package outbound
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"strconv"
|
|
"time"
|
|
|
|
N "github.com/Dreamacro/clash/common/net"
|
|
"github.com/Dreamacro/clash/common/structure"
|
|
"github.com/Dreamacro/clash/component/dialer"
|
|
C "github.com/Dreamacro/clash/constant"
|
|
obfs "github.com/Dreamacro/clash/transport/simple-obfs"
|
|
shadowtls "github.com/Dreamacro/clash/transport/sing-shadowtls"
|
|
"github.com/Dreamacro/clash/transport/socks5"
|
|
v2rayObfs "github.com/Dreamacro/clash/transport/v2ray-plugin"
|
|
|
|
shadowsocks "github.com/metacubex/sing-shadowsocks"
|
|
"github.com/metacubex/sing-shadowsocks/shadowimpl"
|
|
"github.com/sagernet/sing/common/bufio"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
"github.com/sagernet/sing/common/uot"
|
|
)
|
|
|
|
type ShadowSocks struct {
|
|
*Base
|
|
method shadowsocks.Method
|
|
|
|
option *ShadowSocksOption
|
|
// obfs
|
|
obfsMode string
|
|
obfsOption *simpleObfsOption
|
|
v2rayOption *v2rayObfs.Option
|
|
shadowTLSOption *shadowtls.ShadowTLSOption
|
|
}
|
|
|
|
type ShadowSocksOption struct {
|
|
BasicOption
|
|
Name string `proxy:"name"`
|
|
Server string `proxy:"server"`
|
|
Port int `proxy:"port"`
|
|
Password string `proxy:"password"`
|
|
Cipher string `proxy:"cipher"`
|
|
UDP bool `proxy:"udp,omitempty"`
|
|
Plugin string `proxy:"plugin,omitempty"`
|
|
PluginOpts map[string]any `proxy:"plugin-opts,omitempty"`
|
|
UDPOverTCP bool `proxy:"udp-over-tcp,omitempty"`
|
|
}
|
|
|
|
type simpleObfsOption struct {
|
|
Mode string `obfs:"mode,omitempty"`
|
|
Host string `obfs:"host,omitempty"`
|
|
}
|
|
|
|
type v2rayObfsOption struct {
|
|
Mode string `obfs:"mode"`
|
|
Host string `obfs:"host,omitempty"`
|
|
Path string `obfs:"path,omitempty"`
|
|
TLS bool `obfs:"tls,omitempty"`
|
|
Fingerprint string `obfs:"fingerprint,omitempty"`
|
|
Headers map[string]string `obfs:"headers,omitempty"`
|
|
SkipCertVerify bool `obfs:"skip-cert-verify,omitempty"`
|
|
Mux bool `obfs:"mux,omitempty"`
|
|
}
|
|
|
|
type shadowTLSOption struct {
|
|
Password string `obfs:"password"`
|
|
Host string `obfs:"host"`
|
|
Fingerprint string `obfs:"fingerprint,omitempty"`
|
|
ClientFingerprint string `obfs:"client-fingerprint,omitempty"`
|
|
SkipCertVerify bool `obfs:"skip-cert-verify,omitempty"`
|
|
Version int `obfs:"version,omitempty"`
|
|
}
|
|
|
|
// StreamConn implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
|
|
switch ss.obfsMode {
|
|
case shadowtls.Mode:
|
|
// fix tls handshake not timeout
|
|
ctx, cancel := context.WithTimeout(context.Background(), C.DefaultTLSTimeout)
|
|
defer cancel()
|
|
var err error
|
|
c, err = shadowtls.NewShadowTLS(ctx, c, ss.shadowTLSOption)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
return ss.streamConn(c, metadata)
|
|
}
|
|
|
|
func (ss *ShadowSocks) streamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
|
|
switch ss.obfsMode {
|
|
case "tls":
|
|
c = obfs.NewTLSObfs(c, ss.obfsOption.Host)
|
|
case "http":
|
|
_, port, _ := net.SplitHostPort(ss.addr)
|
|
c = obfs.NewHTTPObfs(c, ss.obfsOption.Host, port)
|
|
case "websocket":
|
|
var err error
|
|
c, err = v2rayObfs.NewV2rayObfs(c, ss.v2rayOption)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
|
|
}
|
|
}
|
|
if metadata.NetWork == C.UDP && ss.option.UDPOverTCP {
|
|
if N.NeedHandshake(c) {
|
|
return ss.method.DialEarlyConn(c, M.ParseSocksaddr(uot.UOTMagicAddress+":443")), nil
|
|
} else {
|
|
return ss.method.DialConn(c, M.ParseSocksaddr(uot.UOTMagicAddress+":443"))
|
|
}
|
|
}
|
|
if N.NeedHandshake(c) {
|
|
return ss.method.DialEarlyConn(c, M.ParseSocksaddr(metadata.RemoteAddress())), nil
|
|
} else {
|
|
return ss.method.DialConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
|
|
}
|
|
}
|
|
|
|
// DialContext implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
|
|
return ss.DialContextWithDialer(ctx, dialer.NewDialer(ss.Base.DialOptions(opts...)...), metadata)
|
|
}
|
|
|
|
// DialContextWithDialer implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) DialContextWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.Conn, err error) {
|
|
c, err := dialer.DialContext(ctx, "tcp", ss.addr)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
|
|
}
|
|
tcpKeepAlive(c)
|
|
|
|
defer func(c net.Conn) {
|
|
safeConnClose(c, err)
|
|
}(c)
|
|
|
|
switch ss.obfsMode {
|
|
case shadowtls.Mode:
|
|
c, err = shadowtls.NewShadowTLS(ctx, c, ss.shadowTLSOption)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
c, err = ss.streamConn(c, metadata)
|
|
return NewConn(c, ss), err
|
|
}
|
|
|
|
// ListenPacketContext implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
|
|
return ss.ListenPacketWithDialer(ctx, dialer.NewDialer(ss.Base.DialOptions(opts...)...), metadata)
|
|
}
|
|
|
|
// ListenPacketWithDialer implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) ListenPacketWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.PacketConn, err error) {
|
|
if ss.option.UDPOverTCP {
|
|
tcpConn, err := ss.DialContextWithDialer(ctx, dialer, metadata)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return newPacketConn(uot.NewClientConn(tcpConn), ss), nil
|
|
}
|
|
addr, err := resolveUDPAddrWithPrefer(ctx, "udp", ss.addr, ss.prefer)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
pc, err := dialer.ListenPacket(ctx, "udp", "", addr.AddrPort())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
pc = ss.method.DialPacketConn(&bufio.BindPacketConn{PacketConn: pc, Addr: addr})
|
|
return newPacketConn(pc, ss), nil
|
|
}
|
|
|
|
// SupportWithDialer implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) SupportWithDialer() bool {
|
|
return true
|
|
}
|
|
|
|
// ListenPacketOnStreamConn implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) ListenPacketOnStreamConn(c net.Conn, metadata *C.Metadata) (_ C.PacketConn, err error) {
|
|
if ss.option.UDPOverTCP {
|
|
return newPacketConn(uot.NewClientConn(c), ss), nil
|
|
}
|
|
return nil, errors.New("no support")
|
|
}
|
|
|
|
// SupportUOT implements C.ProxyAdapter
|
|
func (ss *ShadowSocks) SupportUOT() bool {
|
|
return ss.option.UDPOverTCP
|
|
}
|
|
|
|
func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
|
|
addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
|
|
method, err := shadowimpl.FetchMethod(option.Cipher, option.Password, time.Now)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("ss %s initialize error: %w", addr, err)
|
|
}
|
|
|
|
var v2rayOption *v2rayObfs.Option
|
|
var obfsOption *simpleObfsOption
|
|
var shadowTLSOpt *shadowtls.ShadowTLSOption
|
|
obfsMode := ""
|
|
|
|
decoder := structure.NewDecoder(structure.Option{TagName: "obfs", WeaklyTypedInput: true})
|
|
if option.Plugin == "obfs" {
|
|
opts := simpleObfsOption{Host: "bing.com"}
|
|
if err := decoder.Decode(option.PluginOpts, &opts); err != nil {
|
|
return nil, fmt.Errorf("ss %s initialize obfs error: %w", addr, err)
|
|
}
|
|
|
|
if opts.Mode != "tls" && opts.Mode != "http" {
|
|
return nil, fmt.Errorf("ss %s obfs mode error: %s", addr, opts.Mode)
|
|
}
|
|
obfsMode = opts.Mode
|
|
obfsOption = &opts
|
|
} else if option.Plugin == "v2ray-plugin" {
|
|
opts := v2rayObfsOption{Host: "bing.com", Mux: true}
|
|
if err := decoder.Decode(option.PluginOpts, &opts); err != nil {
|
|
return nil, fmt.Errorf("ss %s initialize v2ray-plugin error: %w", addr, err)
|
|
}
|
|
|
|
if opts.Mode != "websocket" {
|
|
return nil, fmt.Errorf("ss %s obfs mode error: %s", addr, opts.Mode)
|
|
}
|
|
obfsMode = opts.Mode
|
|
v2rayOption = &v2rayObfs.Option{
|
|
Host: opts.Host,
|
|
Path: opts.Path,
|
|
Headers: opts.Headers,
|
|
Mux: opts.Mux,
|
|
}
|
|
|
|
if opts.TLS {
|
|
v2rayOption.TLS = true
|
|
v2rayOption.SkipCertVerify = opts.SkipCertVerify
|
|
}
|
|
} else if option.Plugin == shadowtls.Mode {
|
|
obfsMode = shadowtls.Mode
|
|
opt := &shadowTLSOption{
|
|
Version: 2,
|
|
}
|
|
if err := decoder.Decode(option.PluginOpts, opt); err != nil {
|
|
return nil, fmt.Errorf("ss %s initialize shadow-tls-plugin error: %w", addr, err)
|
|
}
|
|
|
|
shadowTLSOpt = &shadowtls.ShadowTLSOption{
|
|
Password: opt.Password,
|
|
Host: opt.Host,
|
|
Fingerprint: opt.Fingerprint,
|
|
ClientFingerprint: opt.ClientFingerprint,
|
|
SkipCertVerify: opt.SkipCertVerify,
|
|
Version: opt.Version,
|
|
}
|
|
}
|
|
|
|
return &ShadowSocks{
|
|
Base: &Base{
|
|
name: option.Name,
|
|
addr: addr,
|
|
tp: C.Shadowsocks,
|
|
udp: option.UDP,
|
|
tfo: option.TFO,
|
|
iface: option.Interface,
|
|
rmark: option.RoutingMark,
|
|
prefer: C.NewDNSPrefer(option.IPVersion),
|
|
},
|
|
method: method,
|
|
|
|
option: &option,
|
|
obfsMode: obfsMode,
|
|
v2rayOption: v2rayOption,
|
|
obfsOption: obfsOption,
|
|
shadowTLSOption: shadowTLSOpt,
|
|
}, nil
|
|
}
|
|
|
|
type ssPacketConn struct {
|
|
net.PacketConn
|
|
rAddr net.Addr
|
|
}
|
|
|
|
func (spc *ssPacketConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
|
|
packet, err := socks5.EncodeUDPPacket(socks5.ParseAddrToSocksAddr(addr), b)
|
|
if err != nil {
|
|
return
|
|
}
|
|
return spc.PacketConn.WriteTo(packet[3:], spc.rAddr)
|
|
}
|
|
|
|
func (spc *ssPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
|
|
n, _, e := spc.PacketConn.ReadFrom(b)
|
|
if e != nil {
|
|
return 0, nil, e
|
|
}
|
|
|
|
addr := socks5.SplitAddr(b[:n])
|
|
if addr == nil {
|
|
return 0, nil, errors.New("parse addr error")
|
|
}
|
|
|
|
udpAddr := addr.UDPAddr()
|
|
if udpAddr == nil {
|
|
return 0, nil, errors.New("parse addr error")
|
|
}
|
|
|
|
copy(b, b[len(addr):])
|
|
return n - len(addr), udpAddr, e
|
|
}
|