471 lines
13 KiB
Go
471 lines
13 KiB
Go
package outbound
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
|
|
"github.com/Dreamacro/clash/component/dialer"
|
|
"github.com/Dreamacro/clash/component/resolver"
|
|
tlsC "github.com/Dreamacro/clash/component/tls"
|
|
C "github.com/Dreamacro/clash/constant"
|
|
"github.com/Dreamacro/clash/transport/gun"
|
|
clashVMess "github.com/Dreamacro/clash/transport/vmess"
|
|
|
|
vmess "github.com/sagernet/sing-vmess"
|
|
"github.com/sagernet/sing-vmess/packetaddr"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
)
|
|
|
|
var ErrUDPRemoteAddrMismatch = errors.New("udp packet dropped due to mismatched remote address")
|
|
|
|
type Vmess struct {
|
|
*Base
|
|
client *vmess.Client
|
|
option *VmessOption
|
|
|
|
// for gun mux
|
|
gunTLSConfig *tls.Config
|
|
gunConfig *gun.Config
|
|
transport *gun.TransportWrap
|
|
}
|
|
|
|
type VmessOption struct {
|
|
BasicOption
|
|
Name string `proxy:"name"`
|
|
Server string `proxy:"server"`
|
|
Port int `proxy:"port"`
|
|
UUID string `proxy:"uuid"`
|
|
AlterID int `proxy:"alterId"`
|
|
Cipher string `proxy:"cipher"`
|
|
UDP bool `proxy:"udp,omitempty"`
|
|
Network string `proxy:"network,omitempty"`
|
|
TLS bool `proxy:"tls,omitempty"`
|
|
SkipCertVerify bool `proxy:"skip-cert-verify,omitempty"`
|
|
Fingerprint string `proxy:"fingerprint,omitempty"`
|
|
ServerName string `proxy:"servername,omitempty"`
|
|
HTTPOpts HTTPOptions `proxy:"http-opts,omitempty"`
|
|
HTTP2Opts HTTP2Options `proxy:"h2-opts,omitempty"`
|
|
GrpcOpts GrpcOptions `proxy:"grpc-opts,omitempty"`
|
|
WSOpts WSOptions `proxy:"ws-opts,omitempty"`
|
|
PacketAddr bool `proxy:"packet-addr,omitempty"`
|
|
XUDP bool `proxy:"xudp,omitempty"`
|
|
PacketEncoding string `proxy:"packet-encoding,omitempty"`
|
|
GlobalPadding bool `proxy:"global-padding,omitempty"`
|
|
AuthenticatedLength bool `proxy:"authenticated-length,omitempty"`
|
|
ClientFingerprint string `proxy:"client-fingerprint,omitempty"`
|
|
}
|
|
|
|
type HTTPOptions struct {
|
|
Method string `proxy:"method,omitempty"`
|
|
Path []string `proxy:"path,omitempty"`
|
|
Headers map[string][]string `proxy:"headers,omitempty"`
|
|
}
|
|
|
|
type HTTP2Options struct {
|
|
Host []string `proxy:"host,omitempty"`
|
|
Path string `proxy:"path,omitempty"`
|
|
}
|
|
|
|
type GrpcOptions struct {
|
|
GrpcServiceName string `proxy:"grpc-service-name,omitempty"`
|
|
}
|
|
|
|
type WSOptions struct {
|
|
Path string `proxy:"path,omitempty"`
|
|
Headers map[string]string `proxy:"headers,omitempty"`
|
|
MaxEarlyData int `proxy:"max-early-data,omitempty"`
|
|
EarlyDataHeaderName string `proxy:"early-data-header-name,omitempty"`
|
|
}
|
|
|
|
// StreamConn implements C.ProxyAdapter
|
|
func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
|
|
var err error
|
|
|
|
if tlsC.HaveGlobalFingerprint() && (len(v.option.ClientFingerprint) == 0) {
|
|
v.option.ClientFingerprint = tlsC.GetGlobalFingerprint()
|
|
}
|
|
|
|
switch v.option.Network {
|
|
case "ws":
|
|
|
|
host, port, _ := net.SplitHostPort(v.addr)
|
|
wsOpts := &clashVMess.WebsocketConfig{
|
|
Host: host,
|
|
Port: port,
|
|
Path: v.option.WSOpts.Path,
|
|
MaxEarlyData: v.option.WSOpts.MaxEarlyData,
|
|
EarlyDataHeaderName: v.option.WSOpts.EarlyDataHeaderName,
|
|
ClientFingerprint: v.option.ClientFingerprint,
|
|
Headers: http.Header{},
|
|
}
|
|
|
|
if len(v.option.WSOpts.Headers) != 0 {
|
|
for key, value := range v.option.WSOpts.Headers {
|
|
wsOpts.Headers.Add(key, value)
|
|
}
|
|
}
|
|
|
|
if v.option.TLS {
|
|
wsOpts.TLS = true
|
|
tlsConfig := &tls.Config{
|
|
ServerName: host,
|
|
InsecureSkipVerify: v.option.SkipCertVerify,
|
|
NextProtos: []string{"http/1.1"},
|
|
}
|
|
|
|
if len(v.option.Fingerprint) == 0 {
|
|
wsOpts.TLSConfig = tlsC.GetGlobalTLSConfig(tlsConfig)
|
|
} else {
|
|
if wsOpts.TLSConfig, err = tlsC.GetSpecifiedFingerprintTLSConfig(tlsConfig, v.option.Fingerprint); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if v.option.ServerName != "" {
|
|
wsOpts.TLSConfig.ServerName = v.option.ServerName
|
|
} else if host := wsOpts.Headers.Get("Host"); host != "" {
|
|
wsOpts.TLSConfig.ServerName = host
|
|
}
|
|
}
|
|
c, err = clashVMess.StreamWebsocketConn(c, wsOpts)
|
|
case "http":
|
|
// readability first, so just copy default TLS logic
|
|
if v.option.TLS {
|
|
host, _, _ := net.SplitHostPort(v.addr)
|
|
tlsOpts := &clashVMess.TLSConfig{
|
|
Host: host,
|
|
SkipCertVerify: v.option.SkipCertVerify,
|
|
ClientFingerprint: v.option.ClientFingerprint,
|
|
}
|
|
|
|
if v.option.ServerName != "" {
|
|
tlsOpts.Host = v.option.ServerName
|
|
}
|
|
|
|
c, err = clashVMess.StreamTLSConn(c, tlsOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
host, _, _ := net.SplitHostPort(v.addr)
|
|
httpOpts := &clashVMess.HTTPConfig{
|
|
Host: host,
|
|
Method: v.option.HTTPOpts.Method,
|
|
Path: v.option.HTTPOpts.Path,
|
|
Headers: v.option.HTTPOpts.Headers,
|
|
}
|
|
|
|
c = clashVMess.StreamHTTPConn(c, httpOpts)
|
|
case "h2":
|
|
host, _, _ := net.SplitHostPort(v.addr)
|
|
tlsOpts := clashVMess.TLSConfig{
|
|
Host: host,
|
|
SkipCertVerify: v.option.SkipCertVerify,
|
|
NextProtos: []string{"h2"},
|
|
ClientFingerprint: v.option.ClientFingerprint,
|
|
}
|
|
|
|
if v.option.ServerName != "" {
|
|
tlsOpts.Host = v.option.ServerName
|
|
}
|
|
|
|
c, err = clashVMess.StreamTLSConn(c, &tlsOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
h2Opts := &clashVMess.H2Config{
|
|
Hosts: v.option.HTTP2Opts.Host,
|
|
Path: v.option.HTTP2Opts.Path,
|
|
}
|
|
|
|
c, err = clashVMess.StreamH2Conn(c, h2Opts)
|
|
case "grpc":
|
|
c, err = gun.StreamGunWithConn(c, v.gunTLSConfig, v.gunConfig)
|
|
default:
|
|
// handle TLS
|
|
if v.option.TLS {
|
|
host, _, _ := net.SplitHostPort(v.addr)
|
|
tlsOpts := &clashVMess.TLSConfig{
|
|
Host: host,
|
|
SkipCertVerify: v.option.SkipCertVerify,
|
|
ClientFingerprint: v.option.ClientFingerprint,
|
|
}
|
|
|
|
if v.option.ServerName != "" {
|
|
tlsOpts.Host = v.option.ServerName
|
|
}
|
|
|
|
c, err = clashVMess.StreamTLSConn(c, tlsOpts)
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if metadata.NetWork == C.UDP {
|
|
if v.option.XUDP {
|
|
return v.client.DialEarlyXUDPPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress())), nil
|
|
} else {
|
|
return v.client.DialEarlyPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress())), nil
|
|
}
|
|
} else {
|
|
return v.client.DialEarlyConn(c, M.ParseSocksaddr(metadata.RemoteAddress())), nil
|
|
}
|
|
}
|
|
|
|
// DialContext implements C.ProxyAdapter
|
|
func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
|
|
// gun transport
|
|
if v.transport != nil && len(opts) == 0 {
|
|
c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer func(c net.Conn) {
|
|
safeConnClose(c, err)
|
|
}(c)
|
|
|
|
c, err = v.client.DialConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return NewConn(c, v), nil
|
|
}
|
|
return v.DialContextWithDialer(ctx, dialer.NewDialer(v.Base.DialOptions(opts...)...), metadata)
|
|
}
|
|
|
|
// DialContextWithDialer implements C.ProxyAdapter
|
|
func (v *Vmess) DialContextWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.Conn, err error) {
|
|
c, err := dialer.DialContext(ctx, "tcp", v.addr)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
|
|
}
|
|
tcpKeepAlive(c)
|
|
defer func(c net.Conn) {
|
|
safeConnClose(c, err)
|
|
}(c)
|
|
|
|
c, err = v.StreamConn(c, metadata)
|
|
return NewConn(c, v), err
|
|
}
|
|
|
|
// ListenPacketContext implements C.ProxyAdapter
|
|
func (v *Vmess) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
|
|
// vmess use stream-oriented udp with a special address, so we need a net.UDPAddr
|
|
if !metadata.Resolved() {
|
|
ip, err := resolver.ResolveIP(ctx, metadata.Host)
|
|
if err != nil {
|
|
return nil, errors.New("can't resolve ip")
|
|
}
|
|
metadata.DstIP = ip
|
|
}
|
|
|
|
if v.option.PacketAddr {
|
|
_metadata := *metadata // make a copy
|
|
metadata = &_metadata
|
|
metadata.Host = packetaddr.SeqPacketMagicAddress
|
|
metadata.DstPort = "443"
|
|
}
|
|
|
|
var c net.Conn
|
|
// gun transport
|
|
if v.transport != nil && len(opts) == 0 {
|
|
c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer func(c net.Conn) {
|
|
safeConnClose(c, err)
|
|
}(c)
|
|
|
|
if v.option.XUDP {
|
|
c = v.client.DialEarlyXUDPPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
|
|
} else {
|
|
c = v.client.DialEarlyPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("new vmess client error: %v", err)
|
|
}
|
|
return v.ListenPacketOnStreamConn(c, metadata)
|
|
}
|
|
return v.ListenPacketWithDialer(ctx, dialer.NewDialer(v.Base.DialOptions(opts...)...), metadata)
|
|
}
|
|
|
|
// ListenPacketWithDialer implements C.ProxyAdapter
|
|
func (v *Vmess) ListenPacketWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.PacketConn, err error) {
|
|
// vmess use stream-oriented udp with a special address, so we need a net.UDPAddr
|
|
if !metadata.Resolved() {
|
|
ip, err := resolver.ResolveIP(ctx, metadata.Host)
|
|
if err != nil {
|
|
return nil, errors.New("can't resolve ip")
|
|
}
|
|
metadata.DstIP = ip
|
|
}
|
|
|
|
c, err := dialer.DialContext(ctx, "tcp", v.addr)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
|
|
}
|
|
tcpKeepAlive(c)
|
|
defer func(c net.Conn) {
|
|
safeConnClose(c, err)
|
|
}(c)
|
|
|
|
c, err = v.StreamConn(c, metadata)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("new vmess client error: %v", err)
|
|
}
|
|
return v.ListenPacketOnStreamConn(c, metadata)
|
|
}
|
|
|
|
// SupportWithDialer implements C.ProxyAdapter
|
|
func (v *Vmess) SupportWithDialer() bool {
|
|
return true
|
|
}
|
|
|
|
// ListenPacketOnStreamConn implements C.ProxyAdapter
|
|
func (v *Vmess) ListenPacketOnStreamConn(c net.Conn, metadata *C.Metadata) (_ C.PacketConn, err error) {
|
|
if v.option.PacketAddr {
|
|
return newPacketConn(&threadSafePacketConn{PacketConn: packetaddr.NewBindConn(c)}, v), nil
|
|
} else if pc, ok := c.(net.PacketConn); ok {
|
|
return newPacketConn(&threadSafePacketConn{PacketConn: pc}, v), nil
|
|
}
|
|
return newPacketConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
|
|
}
|
|
|
|
// SupportUOT implements C.ProxyAdapter
|
|
func (v *Vmess) SupportUOT() bool {
|
|
return true
|
|
}
|
|
|
|
func NewVmess(option VmessOption) (*Vmess, error) {
|
|
security := strings.ToLower(option.Cipher)
|
|
var options []vmess.ClientOption
|
|
if option.GlobalPadding {
|
|
options = append(options, vmess.ClientWithGlobalPadding())
|
|
}
|
|
if option.AuthenticatedLength {
|
|
options = append(options, vmess.ClientWithAuthenticatedLength())
|
|
}
|
|
client, err := vmess.NewClient(option.UUID, security, option.AlterID, options...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
switch option.PacketEncoding {
|
|
case "packetaddr", "packet":
|
|
option.PacketAddr = true
|
|
case "xudp":
|
|
option.XUDP = true
|
|
}
|
|
if option.XUDP {
|
|
option.PacketAddr = false
|
|
}
|
|
|
|
switch option.Network {
|
|
case "h2", "grpc":
|
|
if !option.TLS {
|
|
option.TLS = true
|
|
}
|
|
}
|
|
|
|
v := &Vmess{
|
|
Base: &Base{
|
|
name: option.Name,
|
|
addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
|
|
tp: C.Vmess,
|
|
udp: option.UDP,
|
|
xudp: option.XUDP,
|
|
iface: option.Interface,
|
|
rmark: option.RoutingMark,
|
|
prefer: C.NewDNSPrefer(option.IPVersion),
|
|
},
|
|
client: client,
|
|
option: &option,
|
|
}
|
|
|
|
switch option.Network {
|
|
case "h2":
|
|
if len(option.HTTP2Opts.Host) == 0 {
|
|
option.HTTP2Opts.Host = append(option.HTTP2Opts.Host, "www.example.com")
|
|
}
|
|
case "grpc":
|
|
dialFn := func(network, addr string) (net.Conn, error) {
|
|
c, err := dialer.DialContext(context.Background(), "tcp", v.addr, v.Base.DialOptions()...)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
|
|
}
|
|
tcpKeepAlive(c)
|
|
return c, nil
|
|
}
|
|
|
|
gunConfig := &gun.Config{
|
|
ServiceName: v.option.GrpcOpts.GrpcServiceName,
|
|
Host: v.option.ServerName,
|
|
ClientFingerprint: v.option.ClientFingerprint,
|
|
}
|
|
tlsConfig := &tls.Config{
|
|
InsecureSkipVerify: v.option.SkipCertVerify,
|
|
ServerName: v.option.ServerName,
|
|
}
|
|
|
|
if v.option.ServerName == "" {
|
|
host, _, _ := net.SplitHostPort(v.addr)
|
|
tlsConfig.ServerName = host
|
|
gunConfig.Host = host
|
|
}
|
|
|
|
v.gunTLSConfig = tlsConfig
|
|
v.gunConfig = gunConfig
|
|
|
|
v.transport = gun.NewHTTP2Client(dialFn, tlsConfig, v.option.ClientFingerprint)
|
|
|
|
}
|
|
return v, nil
|
|
}
|
|
|
|
type threadSafePacketConn struct {
|
|
net.PacketConn
|
|
access sync.Mutex
|
|
}
|
|
|
|
func (c *threadSafePacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
|
|
c.access.Lock()
|
|
defer c.access.Unlock()
|
|
return c.PacketConn.WriteTo(b, addr)
|
|
}
|
|
|
|
type vmessPacketConn struct {
|
|
net.Conn
|
|
rAddr net.Addr
|
|
access sync.Mutex
|
|
}
|
|
|
|
// WriteTo implments C.PacketConn.WriteTo
|
|
// Since VMess doesn't support full cone NAT by design, we verify if addr matches uc.rAddr, and drop the packet if not.
|
|
func (uc *vmessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
|
|
allowedAddr := uc.rAddr.(*net.UDPAddr)
|
|
destAddr := addr.(*net.UDPAddr)
|
|
if !(allowedAddr.IP.Equal(destAddr.IP) && allowedAddr.Port == destAddr.Port) {
|
|
return 0, ErrUDPRemoteAddrMismatch
|
|
}
|
|
uc.access.Lock()
|
|
defer uc.access.Unlock()
|
|
return uc.Conn.Write(b)
|
|
}
|
|
|
|
func (uc *vmessPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
|
|
n, err := uc.Conn.Read(b)
|
|
return n, uc.rAddr, err
|
|
}
|