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chore: add tuic outbound

Browse Source 
close #133
This commit is contained in:
gVisor bot 2022-11-25 08:08:14 +08:00
parent 4adfea87f7
commit 0f4a0a7275
9 changed files with 1125 additions and 15 deletions
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19
README.md
View File

@ -227,6 +227,25 @@ proxies:
udp: true
```
Support outbound transport protocol `Tuic`
```yaml
proxies:
- name: "tuic"
server: www.example.com
port: 10443
type: tuic
token: TOKEN
# ip: 127.0.0.1
# heartbeat_interval: 10000
# alpn: [h3]
# disable_sni: true
reduce_rtt: true
# request_timeout: 8000
udp_relay_mode: native
# skip-cert-verify: true
```
### IPTABLES configuration
Work on Linux OS who's supported `iptables`

216
adapter/outbound/tuic.go Normal file
View File

@ -0,0 +1,216 @@
package outbound
import (
"context"
"crypto/sha256"
"crypto/tls"
"encoding/hex"
"encoding/pem"
"fmt"
"net"
"os"
"strconv"
"sync"
"time"
"github.com/lucas-clemente/quic-go"
"github.com/Dreamacro/clash/component/dialer"
tlsC "github.com/Dreamacro/clash/component/tls"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/transport/tuic"
)
type Tuic struct {
*Base
option *TuicOption
getClient func(opts ...dialer.Option) *tuic.Client
}
type TuicOption struct {
BasicOption
Name string `proxy:"name"`
Server string `proxy:"server"`
Port int `proxy:"port"`
Token string `proxy:"token"`
Ip string `proxy:"ip,omitempty"`
HeartbeatInterval int `proxy:"heartbeat_interval,omitempty"`
ALPN []string `proxy:"alpn,omitempty"`
ReduceRtt bool `proxy:"reduce_rtt,omitempty"`
RequestTimeout int `proxy:"request_timeout,omitempty"`
UdpRelayMode string `proxy:"udp_relay_mode,omitempty"`
DisableSni bool `proxy:"disable_sni,omitempty"`
SkipCertVerify bool `proxy:"skip-cert-verify,omitempty"`
Fingerprint string `proxy:"fingerprint,omitempty"`
CustomCA string `proxy:"ca,omitempty"`
CustomCAString string `proxy:"ca_str,omitempty"`
ReceiveWindowConn int `proxy:"recv_window_conn,omitempty"`
ReceiveWindow int `proxy:"recv_window,omitempty"`
DisableMTUDiscovery bool `proxy:"disable_mtu_discovery,omitempty"`
}
// DialContext implements C.ProxyAdapter
func (t *Tuic) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
opts = t.Base.DialOptions(opts...)
conn, err := t.getClient(opts...).DialContext(ctx, metadata, func(ctx context.Context) (net.PacketConn, net.Addr, error) {
pc, err := dialer.ListenPacket(ctx, "udp", "", opts...)
if err != nil {
return nil, nil, err
}
addr, err := resolveUDPAddrWithPrefer(ctx, "udp", t.addr, t.prefer)
if err != nil {
return nil, nil, err
}
return pc, addr, err
})
if err != nil {
return nil, err
}
return NewConn(conn, t), err
}
// ListenPacketContext implements C.ProxyAdapter
func (t *Tuic) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
opts = t.Base.DialOptions(opts...)
pc, err := t.getClient(opts...).ListenPacketContext(ctx, metadata, func(ctx context.Context) (net.PacketConn, net.Addr, error) {
pc, err := dialer.ListenPacket(ctx, "udp", "", opts...)
if err != nil {
return nil, nil, err
}
addr, err := resolveUDPAddrWithPrefer(ctx, "udp", t.addr, t.prefer)
if err != nil {
return nil, nil, err
}
return pc, addr, err
})
if err != nil {
return nil, err
}
return newPacketConn(pc, t), nil
}
func NewTuic(option TuicOption) (*Tuic, error) {
addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
serverName := option.Server
tlsConfig := &tls.Config{
ServerName: serverName,
InsecureSkipVerify: option.SkipCertVerify,
MinVersion: tls.VersionTLS13,
}
var bs []byte
var err error
if len(option.CustomCA) > 0 {
bs, err = os.ReadFile(option.CustomCA)
if err != nil {
return nil, fmt.Errorf("hysteria %s load ca error: %w", addr, err)
}
} else if option.CustomCAString != "" {
bs = []byte(option.CustomCAString)
}
if len(bs) > 0 {
block, _ := pem.Decode(bs)
if block == nil {
return nil, fmt.Errorf("CA cert is not PEM")
}
fpBytes := sha256.Sum256(block.Bytes)
if len(option.Fingerprint) == 0 {
option.Fingerprint = hex.EncodeToString(fpBytes[:])
}
}
if len(option.Fingerprint) != 0 {
var err error
tlsConfig, err = tlsC.GetSpecifiedFingerprintTLSConfig(tlsConfig, option.Fingerprint)
if err != nil {
return nil, err
}
} else {
tlsConfig = tlsC.GetGlobalFingerprintTLCConfig(tlsConfig)
}
if len(option.ALPN) > 0 {
tlsConfig.NextProtos = option.ALPN
} else {
tlsConfig.NextProtos = []string{"h3"}
}
if option.RequestTimeout == 0 {
option.RequestTimeout = 8000
}
if option.HeartbeatInterval <= 0 {
option.HeartbeatInterval = 10000
}
if option.UdpRelayMode != "quic" {
option.UdpRelayMode = "native"
}
quicConfig := &quic.Config{
InitialStreamReceiveWindow: uint64(option.ReceiveWindowConn),
MaxStreamReceiveWindow: uint64(option.ReceiveWindowConn),
InitialConnectionReceiveWindow: uint64(option.ReceiveWindow),
MaxConnectionReceiveWindow: uint64(option.ReceiveWindow),
KeepAlivePeriod: time.Duration(option.HeartbeatInterval) * time.Millisecond,
DisablePathMTUDiscovery: option.DisableMTUDiscovery,
EnableDatagrams: true,
}
if option.ReceiveWindowConn == 0 {
quicConfig.InitialStreamReceiveWindow = DefaultStreamReceiveWindow / 10
quicConfig.MaxStreamReceiveWindow = DefaultStreamReceiveWindow
}
if option.ReceiveWindow == 0 {
quicConfig.InitialConnectionReceiveWindow = DefaultConnectionReceiveWindow / 10
quicConfig.MaxConnectionReceiveWindow = DefaultConnectionReceiveWindow
}
if len(option.Ip) > 0 {
addr = net.JoinHostPort(option.Ip, strconv.Itoa(option.Port))
}
host := option.Server
if option.DisableSni {
host = ""
tlsConfig.ServerName = ""
}
tkn := tuic.GenTKN(option.Token)
clientMap := make(map[any]*tuic.Client)
clientMapMutex := sync.Mutex{}
getClient := func(opts ...dialer.Option) *tuic.Client {
o := *dialer.ApplyOptions(opts...)
clientMapMutex.Lock()
defer clientMapMutex.Unlock()
if client, ok := clientMap[o]; ok && client != nil {
return client
}
client := &tuic.Client{
TlsConfig: tlsConfig,
QuicConfig: quicConfig,
Host: host,
Token: tkn,
UdpRelayMode: option.UdpRelayMode,
ReduceRtt: option.ReduceRtt,
RequestTimeout: option.RequestTimeout,
}
clientMap[o] = client
return client
}
return &Tuic{
Base: &Base{
name: option.Name,
addr: addr,
tp: C.Tuic,
udp: true,
iface: option.Interface,
prefer: C.NewDNSPrefer(option.IPVersion),
},
option: &option,
getClient: getClient,
}, nil
}

13
adapter/parser.go
View File

@ -89,12 +89,19 @@ func ParseProxy(mapping map[string]any) (C.Proxy, error) {
}
proxy, err = outbound.NewHysteria(*hyOption)
case "wireguard":
hyOption := &outbound.WireGuardOption{}
err = decoder.Decode(mapping, hyOption)
wgOption := &outbound.WireGuardOption{}
err = decoder.Decode(mapping, wgOption)
if err != nil {
break
}
proxy, err = outbound.NewWireGuard(*hyOption)
proxy, err = outbound.NewWireGuard(*wgOption)
case "tuic":
tuicOption := &outbound.TuicOption{}
err = decoder.Decode(mapping, tuicOption)
if err != nil {
break
}
proxy, err = outbound.NewTuic(*tuicOption)
default:
return nil, fmt.Errorf("unsupport proxy type: %s", proxyType)
}

28
component/dialer/dialer.go
View File

@ -22,7 +22,7 @@ var (
ErrorDisableIPv6 = errors.New("IPv6 is disabled, dialer cancel")
)
func DialContext(ctx context.Context, network, address string, options ...Option) (net.Conn, error) {
func ApplyOptions(options ...Option) *option {
opt := &option{
interfaceName: DefaultInterface.Load(),
routingMark: int(DefaultRoutingMark.Load()),
@ -36,6 +36,12 @@ func DialContext(ctx context.Context, network, address string, options ...Option
o(opt)
}
return opt
}
func DialContext(ctx context.Context, network, address string, options ...Option) (net.Conn, error) {
opt := ApplyOptions(options...)
if opt.network == 4 || opt.network == 6 {
if strings.Contains(network, "tcp") {
network = "tcp"
@ -204,15 +210,15 @@ func dualStackDialContext(ctx context.Context, network, address string, opt *opt
}
}
case <-ctx.Done():
err=ctx.Err()
err = ctx.Err()
break
}
}
if err==nil {
err=fmt.Errorf("dual stack dial failed")
}else{
err=fmt.Errorf("dual stack dial failed:%w",err)
if err == nil {
err = fmt.Errorf("dual stack dial failed")
} else {
err = fmt.Errorf("dual stack dial failed:%w", err)
}
return nil, err
}
@ -322,7 +328,7 @@ func concurrentDialContext(ctx context.Context, network string, ips []netip.Addr
if fallback.done && fallback.error == nil {
return fallback.Conn, nil
}
finalError=ctx.Err()
finalError = ctx.Err()
break
}
}
@ -339,10 +345,10 @@ func concurrentDialContext(ctx context.Context, network string, ips []netip.Addr
return nil, fallback.error
}
if finalError==nil {
finalError=fmt.Errorf("all ips %v tcp shake hands failed", ips)
}else{
finalError=fmt.Errorf("concurrent dial failed:%w",finalError)
if finalError == nil {
finalError = fmt.Errorf("all ips %v tcp shake hands failed", ips)
} else {
finalError = fmt.Errorf("concurrent dial failed:%w", finalError)
}
return nil, finalError

3
constant/adapters.go
View File

@ -32,6 +32,7 @@ const (
Trojan
Hysteria
WireGuard
Tuic
)
const (
@ -168,6 +169,8 @@ func (at AdapterType) String() string {
return "Hysteria"
case WireGuard:
return "WireGuard"
case Tuic:
return "Tuic"
case Relay:
return "Relay"

14
docs/config.yaml
View File

@ -458,6 +458,20 @@ proxies:
public-key: Cr8hWlKvtDt7nrvf+f0brNQQzabAqrjfBvas9pmowjo=
udp: true
- name: tuic
server: www.example.com
port: 10443
type: tuic
token: TOKEN
# ip: 127.0.0.1
# heartbeat_interval: 10000
# alpn: [h3]
# disable_sni: true
reduce_rtt: true
# request_timeout: 8000
udp_relay_mode: native
# skip-cert-verify: true
# ShadowsocksR
# The supported ciphers (encryption methods): all stream ciphers in ss
# The supported obfses:

2
go.mod
View File

@ -42,6 +42,7 @@ require (
golang.org/x/sys v0.2.0
google.golang.org/protobuf v1.28.1
gopkg.in/yaml.v3 v3.0.1
lukechampine.com/blake3 v1.1.7
)
@ -75,5 +76,4 @@ require (
golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
golang.org/x/tools v0.1.12 // indirect
gvisor.dev/gvisor v0.0.0-20220901235040-6ca97ef2ce1c // indirect
lukechampine.com/blake3 v1.1.7 // indirect
)

377
transport/tuic/client.go Normal file
View File

@ -0,0 +1,377 @@
package tuic
import (
"bufio"
"bytes"
"context"
"crypto/tls"
"errors"
"math/rand"
"net"
"net/netip"
"sync"
"time"
"github.com/lucas-clemente/quic-go"
N "github.com/Dreamacro/clash/common/net"
C "github.com/Dreamacro/clash/constant"
)
type Client struct {
TlsConfig *tls.Config
QuicConfig *quic.Config
Host string
Token [32]byte
UdpRelayMode string
ReduceRtt bool
RequestTimeout int
quicConn quic.Connection
connMutex sync.Mutex
udpInputMap sync.Map
}
func (t *Client) getQuicConn(ctx context.Context, dialFn func(ctx context.Context) (net.PacketConn, net.Addr, error)) (quic.Connection, error) {
t.connMutex.Lock()
defer t.connMutex.Unlock()
if t.quicConn != nil {
return t.quicConn, nil
}
pc, addr, err := dialFn(ctx)
if err != nil {
return nil, err
}
var quicConn quic.Connection
if t.ReduceRtt {
quicConn, err = quic.DialEarlyContext(ctx, pc, addr, t.Host, t.TlsConfig, t.QuicConfig)
} else {
quicConn, err = quic.DialContext(ctx, pc, addr, t.Host, t.TlsConfig, t.QuicConfig)
}
if err != nil {
return nil, err
}
sendAuthentication := func(quicConn quic.Connection) (err error) {
defer func() {
t.deferQuicConn(quicConn, err)
}()
stream, err := quicConn.OpenUniStream()
if err != nil {
return err
}
buf := &bytes.Buffer{}
err = NewAuthenticate(t.Token).WriteTo(buf)
if err != nil {
return err
}
_, err = buf.WriteTo(stream)
if err != nil {
return err
}
err = stream.Close()
if err != nil {
return
}
return nil
}
go sendAuthentication(quicConn)
go func(quicConn quic.Connection) (err error) {
defer func() {
t.deferQuicConn(quicConn, err)
}()
switch t.UdpRelayMode {
case "quic":
for {
var stream quic.ReceiveStream
stream, err = quicConn.AcceptUniStream(context.Background())
if err != nil {
return err
}
go func() (err error) {
var assocId uint32
defer func() {
t.deferQuicConn(quicConn, err)
if err != nil && assocId != 0 {
if val, ok := t.udpInputMap.LoadAndDelete(assocId); ok {
if conn, ok := val.(net.Conn); ok {
_ = conn.Close()
}
}
}
}()
reader := bufio.NewReader(stream)
packet, err := ReadPacket(reader)
if err != nil {
return
}
assocId = packet.ASSOC_ID
if val, ok := t.udpInputMap.Load(assocId); ok {
if conn, ok := val.(net.Conn); ok {
writer := bufio.NewWriterSize(conn, packet.BytesLen())
_ = packet.WriteTo(writer)
_ = writer.Flush()
}
}
return
}()
}
default: // native
for {
var message []byte
message, err = quicConn.ReceiveMessage()
if err != nil {
return err
}
go func() (err error) {
var assocId uint32
defer func() {
t.deferQuicConn(quicConn, err)
if err != nil && assocId != 0 {
if val, ok := t.udpInputMap.LoadAndDelete(assocId); ok {
if conn, ok := val.(net.Conn); ok {
_ = conn.Close()
}
}
}
}()
buffer := bytes.NewBuffer(message)
packet, err := ReadPacket(buffer)
if err != nil {
return
}
assocId = packet.ASSOC_ID
if val, ok := t.udpInputMap.Load(assocId); ok {
if conn, ok := val.(net.Conn); ok {
_, _ = conn.Write(message)
}
}
return
}()
}
}
}(quicConn)
t.quicConn = quicConn
return quicConn, nil
}
func (t *Client) deferQuicConn(quicConn quic.Connection, err error) {
var netError net.Error
if err != nil && errors.As(err, &netError) {
t.connMutex.Lock()
defer t.connMutex.Unlock()
if t.quicConn == quicConn {
t.udpInputMap.Range(func(key, value any) bool {
if conn, ok := value.(net.Conn); ok {
_ = conn.Close()
}
return true
})
t.udpInputMap = sync.Map{} // new one
t.quicConn = nil
}
}
}
func (t *Client) DialContext(ctx context.Context, metadata *C.Metadata, dialFn func(ctx context.Context) (net.PacketConn, net.Addr, error)) (net.Conn, error) {
quicConn, err := t.getQuicConn(ctx, dialFn)
if err != nil {
return nil, err
}
defer func() {
t.deferQuicConn(quicConn, err)
}()
buf := &bytes.Buffer{}
err = NewConnect(NewAddress(metadata)).WriteTo(buf)
if err != nil {
return nil, err
}
stream, err := quicConn.OpenStream()
if err != nil {
return nil, err
}
_, err = buf.WriteTo(stream)
if err != nil {
return nil, err
}
if t.RequestTimeout > 0 {
_ = stream.SetReadDeadline(time.Now().Add(time.Duration(t.RequestTimeout) * time.Millisecond))
}
conn := N.NewBufferedConn(&quicStreamConn{stream, quicConn.LocalAddr(), quicConn.RemoteAddr()})
response, err := ReadResponse(conn)
if err != nil {
return nil, err
}
if response.IsFailed() {
_ = stream.Close()
return nil, errors.New("connect failed")
}
_ = stream.SetReadDeadline(time.Time{})
return conn, err
}
type quicStreamConn struct {
quic.Stream
lAddr net.Addr
rAddr net.Addr
}
func (q *quicStreamConn) LocalAddr() net.Addr {
return q.lAddr
}
func (q *quicStreamConn) RemoteAddr() net.Addr {
return q.rAddr
}
var _ net.Conn = &quicStreamConn{}
func (t *Client) ListenPacketContext(ctx context.Context, metadata *C.Metadata, dialFn func(ctx context.Context) (net.PacketConn, net.Addr, error)) (net.PacketConn, error) {
quicConn, err := t.getQuicConn(ctx, dialFn)
if err != nil {
return nil, err
}
pipe1, pipe2 := net.Pipe()
inputCh := make(chan udpData)
var connId uint32
for {
connId = rand.Uint32()
_, loaded := t.udpInputMap.LoadOrStore(connId, pipe1)
if !loaded {
break
}
}
pc := &quicStreamPacketConn{
connId: connId,
quicConn: quicConn,
lAddr: quicConn.LocalAddr(),
client: t,
inputConn: N.NewBufferedConn(pipe2),
inputCh: inputCh,
}
return pc, nil
}
type udpData struct {
data []byte
addr net.Addr
err error
}
type quicStreamPacketConn struct {
connId uint32
quicConn quic.Connection
lAddr net.Addr
client *Client
inputConn *N.BufferedConn
inputCh chan udpData
closeOnce sync.Once
closeErr error
}
func (q *quicStreamPacketConn) Close() error {
q.closeOnce.Do(func() {
q.closeErr = q.close()
})
return q.closeErr
}
func (q *quicStreamPacketConn) close() (err error) {
defer func() {
q.client.deferQuicConn(q.quicConn, err)
}()
buf := &bytes.Buffer{}
err = NewDissociate(q.connId).WriteTo(buf)
if err != nil {
return
}
stream, err := q.quicConn.OpenUniStream()
if err != nil {
return
}
_, err = buf.WriteTo(stream)
if err != nil {
return
}
err = stream.Close()
if err != nil {
return
}
return
}
func (q *quicStreamPacketConn) SetDeadline(t time.Time) error {
//TODO implement me
return nil
}
func (q *quicStreamPacketConn) SetReadDeadline(t time.Time) error {
return q.inputConn.SetReadDeadline(t)
}
func (q *quicStreamPacketConn) SetWriteDeadline(t time.Time) error {
//TODO implement me
return nil
}
func (q *quicStreamPacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
packet, err := ReadPacket(q.inputConn)
if err != nil {
return
}
n = copy(p, packet.DATA)
addr = packet.ADDR.UDPAddr()
return
}
func (q *quicStreamPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
defer func() {
q.client.deferQuicConn(q.quicConn, err)
}()
addr.String()
buf := &bytes.Buffer{}
addrPort, err := netip.ParseAddrPort(addr.String())
if err != nil {
return
}
err = NewPacket(q.connId, uint16(len(p)), NewAddressAddrPort(addrPort), p).WriteTo(buf)
if err != nil {
return
}
switch q.client.UdpRelayMode {
case "quic":
var stream quic.SendStream
stream, err = q.quicConn.OpenUniStream()
if err != nil {
return
}
_, err = buf.WriteTo(stream)
if err != nil {
return
}
err = stream.Close()
if err != nil {
return
}
default: // native
err = q.quicConn.SendMessage(buf.Bytes())
if err != nil {
return
}
}
n = len(p)
return
}
func (q *quicStreamPacketConn) LocalAddr() net.Addr {
return q.lAddr
}
var _ net.PacketConn = &quicStreamPacketConn{}

468
transport/tuic/protocol.go Normal file
View File

@ -0,0 +1,468 @@
package tuic
import (
"encoding/binary"
"fmt"
"io"
"net"
"net/netip"
"strconv"
"github.com/lucas-clemente/quic-go"
"lukechampine.com/blake3"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/transport/socks5"
)
type BufferedReader interface {
io.Reader
io.ByteReader
}
type BufferedWriter interface {
io.Writer
io.ByteWriter
}
type CommandType byte
const (
AuthenticateType = CommandType(0x00)
ConnectType = CommandType(0x01)
PacketType = CommandType(0x02)
DissociateType = CommandType(0x03)
HeartbeatType = CommandType(0x04)
ResponseType = CommandType(0x05)
)
func (c CommandType) String() string {
switch c {
case AuthenticateType:
return "Authenticate"
case ConnectType:
return "Connect"
case PacketType:
return "Packet"
case DissociateType:
return "Dissociate"
case HeartbeatType:
return "Heartbeat"
case ResponseType:
return "Response"
default:
return fmt.Sprintf("UnknowCommand: %#x", byte(c))
}
}
func (c CommandType) BytesLen() int {
return 1
}
type CommandHead struct {
VER byte
TYPE CommandType
}
func NewCommandHead(TYPE CommandType) CommandHead {
return CommandHead{
VER: 0x04,
TYPE: TYPE,
}
}
func ReadCommandHead(reader BufferedReader) (c CommandHead, err error) {
c.VER, err = reader.ReadByte()
if err != nil {
return
}
TYPE, err := reader.ReadByte()
if err != nil {
return
}
c.TYPE = CommandType(TYPE)
return
}
func (c CommandHead) WriteTo(writer BufferedWriter) (err error) {
err = writer.WriteByte(c.VER)
if err != nil {
return
}
err = writer.WriteByte(byte(c.TYPE))
if err != nil {
return
}
return
}
func (c CommandHead) BytesLen() int {
return 1 + c.TYPE.BytesLen()
}
type Authenticate struct {
CommandHead
TKN [32]byte
}
func NewAuthenticate(TKN [32]byte) Authenticate {
return Authenticate{
CommandHead: NewCommandHead(AuthenticateType),
TKN: TKN,
}
}
func GenTKN(token string) [32]byte {
return blake3.Sum256([]byte(token))
}
func (c Authenticate) WriteTo(writer BufferedWriter) (err error) {
err = c.CommandHead.WriteTo(writer)
if err != nil {
return
}
_, err = writer.Write(c.TKN[:])
if err != nil {
return
}
return
}
func (c Authenticate) BytesLen() int {
return c.CommandHead.BytesLen() + 32
}
type Connect struct {
CommandHead
ADDR Address
}
func NewConnect(ADDR Address) Connect {
return Connect{
CommandHead: NewCommandHead(ConnectType),
ADDR: ADDR,
}
}
func (c Connect) WriteTo(writer BufferedWriter) (err error) {
err = c.CommandHead.WriteTo(writer)
if err != nil {
return
}
err = c.ADDR.WriteTo(writer)
if err != nil {
return
}
return
}
func (c Connect) BytesLen() int {
return c.CommandHead.BytesLen() + c.ADDR.BytesLen()
}
type Packet struct {
CommandHead
ASSOC_ID uint32
LEN uint16
ADDR Address
DATA []byte
}
func NewPacket(ASSOC_ID uint32, LEN uint16, ADDR Address, DATA []byte) Packet {
return Packet{
CommandHead: NewCommandHead(PacketType),
ASSOC_ID: ASSOC_ID,
LEN: LEN,
ADDR: ADDR,
DATA: DATA,
}
}
func ReadPacket(reader BufferedReader) (c Packet, err error) {
c.CommandHead, err = ReadCommandHead(reader)
if err != nil {
return
}
if c.CommandHead.TYPE != PacketType {
err = fmt.Errorf("error command type: %s", c.CommandHead.TYPE)
}
err = binary.Read(reader, binary.BigEndian, &c.ASSOC_ID)
if err != nil {
return
}
err = binary.Read(reader, binary.BigEndian, &c.LEN)
if err != nil {
return
}
c.ADDR, err = ReadAddress(reader)
if err != nil {
return
}
c.DATA = make([]byte, c.LEN)
_, err = io.ReadFull(reader, c.DATA)
if err != nil {
return
}
return
}
func (c Packet) WriteTo(writer BufferedWriter) (err error) {
err = c.CommandHead.WriteTo(writer)
if err != nil {
return
}
err = binary.Write(writer, binary.BigEndian, c.ASSOC_ID)
if err != nil {
return
}
err = binary.Write(writer, binary.BigEndian, c.LEN)
if err != nil {
return
}
err = c.ADDR.WriteTo(writer)
if err != nil {
return
}
_, err = writer.Write(c.DATA)
if err != nil {
return
}
return
}
func (c Packet) BytesLen() int {
return c.CommandHead.BytesLen() + 4 + 2 + c.ADDR.BytesLen() + len(c.DATA)
}
type Dissociate struct {
CommandHead
ASSOC_ID uint32
}
func NewDissociate(ASSOC_ID uint32) Dissociate {
return Dissociate{
CommandHead: NewCommandHead(DissociateType),
ASSOC_ID: ASSOC_ID,
}
}
func (c Dissociate) WriteTo(writer BufferedWriter) (err error) {
err = c.CommandHead.WriteTo(writer)
if err != nil {
return
}
err = binary.Write(writer, binary.BigEndian, c.ASSOC_ID)
if err != nil {
return
}
return
}
func (c Dissociate) BytesLen() int {
return c.CommandHead.BytesLen() + 4
}
type Heartbeat struct {
CommandHead
}
func NewHeartbeat() Heartbeat {
return Heartbeat{
CommandHead: NewCommandHead(HeartbeatType),
}
}
func ReadHeartbeat(reader BufferedReader) (c Response, err error) {
c.CommandHead, err = ReadCommandHead(reader)
if err != nil {
return
}
if c.CommandHead.TYPE != HeartbeatType {
err = fmt.Errorf("error command type: %s", c.CommandHead.TYPE)
}
return
}
type Response struct {
CommandHead
REP byte
}
func NewResponse(REP byte) Response {
return Response{
CommandHead: NewCommandHead(ResponseType),
REP: REP,
}
}
func ReadResponse(reader BufferedReader) (c Response, err error) {
c.CommandHead, err = ReadCommandHead(reader)
if err != nil {
return
}
if c.CommandHead.TYPE != ResponseType {
err = fmt.Errorf("error command type: %s", c.CommandHead.TYPE)
}
c.REP, err = reader.ReadByte()
if err != nil {
return
}
return
}
func (c Response) WriteTo(writer BufferedWriter) (err error) {
err = c.CommandHead.WriteTo(writer)
if err != nil {
return
}
err = writer.WriteByte(c.REP)
if err != nil {
return
}
return
}
func (c Response) IsSucceed() bool {
return c.REP == 0x00
}
func (c Response) IsFailed() bool {
return c.REP == 0xff
}
func (c Response) BytesLen() int {
return c.CommandHead.BytesLen() + 1
}
// Addr types
const (
AtypDomainName byte = 0
AtypIPv4 byte = 1
AtypIPv6 byte = 2
)
type Address struct {
TYPE byte
ADDR []byte
PORT uint16
}
func NewAddress(metadata *C.Metadata) Address {
var addrType byte
var addr []byte
switch metadata.AddrType() {
case socks5.AtypIPv4:
addrType = AtypIPv4
addr = make([]byte, net.IPv4len)
copy(addr[:], metadata.DstIP.AsSlice())
case socks5.AtypIPv6:
addrType = AtypIPv6
addr = make([]byte, net.IPv6len)
copy(addr[:], metadata.DstIP.AsSlice())
case socks5.AtypDomainName:
addrType = AtypDomainName
addr = make([]byte, len(metadata.Host)+1)
addr[0] = byte(len(metadata.Host))
copy(addr[1:], metadata.Host)
}
port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
return Address{
TYPE: addrType,
ADDR: addr,
PORT: uint16(port),
}
}
func NewAddressAddrPort(addrPort netip.AddrPort) Address {
var addrType byte
var addr []byte
if addrPort.Addr().Is4() {
addrType = AtypIPv4
addr = make([]byte, net.IPv4len)
} else {
addrType = AtypIPv6
addr = make([]byte, net.IPv6len)
}
copy(addr[:], addrPort.Addr().AsSlice())
return Address{
TYPE: addrType,
ADDR: addr,
PORT: addrPort.Port(),
}
}
func ReadAddress(reader BufferedReader) (c Address, err error) {
c.TYPE, err = reader.ReadByte()
if err != nil {
return
}
switch c.TYPE {
case AtypIPv4:
c.ADDR = make([]byte, net.IPv4len)
_, err = io.ReadFull(reader, c.ADDR)
if err != nil {
return
}
case AtypIPv6:
c.ADDR = make([]byte, net.IPv6len)
_, err = io.ReadFull(reader, c.ADDR)
if err != nil {
return
}
case AtypDomainName:
var addrLen byte
addrLen, err = reader.ReadByte()
if err != nil {
return
}
c.ADDR = make([]byte, addrLen+1)
c.ADDR[0] = addrLen
_, err = io.ReadFull(reader, c.ADDR[1:])
if err != nil {
return
}
}
err = binary.Read(reader, binary.BigEndian, &c.PORT)
if err != nil {
return
}
return
}
func (c Address) WriteTo(writer BufferedWriter) (err error) {
err = writer.WriteByte(c.TYPE)
if err != nil {
return
}
_, err = writer.Write(c.ADDR[:])
if err != nil {
return
}
err = binary.Write(writer, binary.BigEndian, c.PORT)
if err != nil {
return
}
return
}
func (c Address) UDPAddr() *net.UDPAddr {
return &net.UDPAddr{
IP: c.ADDR,
Port: int(c.PORT),
Zone: "",
}
}
func (c Address) BytesLen() int {
return 1 + len(c.ADDR) + 2
}
const (
ProtocolError = quic.ApplicationErrorCode(0xfffffff0)
AuthenticationFailed = quic.ApplicationErrorCode(0xfffffff1)
AuthenticationTimeout = quic.ApplicationErrorCode(0xfffffff2)
BadCommand = quic.ApplicationErrorCode(0xfffffff3)
)