mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-10 02:53:12 +00:00
340 lines
9.1 KiB
Go
340 lines
9.1 KiB
Go
//go:build with_quic
|
|
|
|
package outbound
|
|
|
|
import (
|
|
"context"
|
|
"net"
|
|
"sync"
|
|
|
|
"github.com/sagernet/quic-go"
|
|
"github.com/sagernet/quic-go/congestion"
|
|
"github.com/sagernet/sing-box/adapter"
|
|
"github.com/sagernet/sing-box/common/dialer"
|
|
"github.com/sagernet/sing-box/common/tls"
|
|
C "github.com/sagernet/sing-box/constant"
|
|
"github.com/sagernet/sing-box/log"
|
|
"github.com/sagernet/sing-box/option"
|
|
"github.com/sagernet/sing-box/transport/hysteria"
|
|
"github.com/sagernet/sing/common"
|
|
"github.com/sagernet/sing/common/bufio"
|
|
E "github.com/sagernet/sing/common/exceptions"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
N "github.com/sagernet/sing/common/network"
|
|
)
|
|
|
|
var _ adapter.Outbound = (*Hysteria)(nil)
|
|
|
|
type Hysteria struct {
|
|
myOutboundAdapter
|
|
ctx context.Context
|
|
dialer N.Dialer
|
|
serverAddr M.Socksaddr
|
|
tlsConfig *tls.STDConfig
|
|
quicConfig *quic.Config
|
|
authKey []byte
|
|
xplusKey []byte
|
|
sendBPS uint64
|
|
recvBPS uint64
|
|
connAccess sync.Mutex
|
|
conn quic.Connection
|
|
udpAccess sync.RWMutex
|
|
udpSessions map[uint32]chan *hysteria.UDPMessage
|
|
udpDefragger hysteria.Defragger
|
|
}
|
|
|
|
func NewHysteria(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.HysteriaOutboundOptions) (*Hysteria, error) {
|
|
if options.TLS == nil || !options.TLS.Enabled {
|
|
return nil, C.ErrTLSRequired
|
|
}
|
|
abstractTLSConfig, err := tls.NewClient(router, options.Server, common.PtrValueOrDefault(options.TLS))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tlsConfig, err := abstractTLSConfig.Config()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tlsConfig.MinVersion = tls.VersionTLS13
|
|
if len(tlsConfig.NextProtos) == 0 {
|
|
tlsConfig.NextProtos = []string{hysteria.DefaultALPN}
|
|
}
|
|
quicConfig := &quic.Config{
|
|
InitialStreamReceiveWindow: options.ReceiveWindowConn,
|
|
MaxStreamReceiveWindow: options.ReceiveWindowConn,
|
|
InitialConnectionReceiveWindow: options.ReceiveWindow,
|
|
MaxConnectionReceiveWindow: options.ReceiveWindow,
|
|
KeepAlivePeriod: hysteria.KeepAlivePeriod,
|
|
DisablePathMTUDiscovery: options.DisableMTUDiscovery,
|
|
EnableDatagrams: true,
|
|
}
|
|
if options.ReceiveWindowConn == 0 {
|
|
quicConfig.InitialStreamReceiveWindow = hysteria.DefaultStreamReceiveWindow
|
|
quicConfig.MaxStreamReceiveWindow = hysteria.DefaultStreamReceiveWindow
|
|
}
|
|
if options.ReceiveWindow == 0 {
|
|
quicConfig.InitialConnectionReceiveWindow = hysteria.DefaultConnectionReceiveWindow
|
|
quicConfig.MaxConnectionReceiveWindow = hysteria.DefaultConnectionReceiveWindow
|
|
}
|
|
if quicConfig.MaxIncomingStreams == 0 {
|
|
quicConfig.MaxIncomingStreams = hysteria.DefaultMaxIncomingStreams
|
|
}
|
|
var auth []byte
|
|
if len(options.Auth) > 0 {
|
|
auth = options.Auth
|
|
} else {
|
|
auth = []byte(options.AuthString)
|
|
}
|
|
var xplus []byte
|
|
if options.Obfs != "" {
|
|
xplus = []byte(options.Obfs)
|
|
}
|
|
var up, down uint64
|
|
if len(options.Up) > 0 {
|
|
up = hysteria.StringToBps(options.Up)
|
|
if up == 0 {
|
|
return nil, E.New("invalid up speed format: ", options.Up)
|
|
}
|
|
} else {
|
|
up = uint64(options.UpMbps) * hysteria.MbpsToBps
|
|
}
|
|
if len(options.Down) > 0 {
|
|
down = hysteria.StringToBps(options.Down)
|
|
if down == 0 {
|
|
return nil, E.New("invalid down speed format: ", options.Down)
|
|
}
|
|
} else {
|
|
down = uint64(options.DownMbps) * hysteria.MbpsToBps
|
|
}
|
|
if up < hysteria.MinSpeedBPS {
|
|
return nil, E.New("invalid up speed")
|
|
}
|
|
if down < hysteria.MinSpeedBPS {
|
|
return nil, E.New("invalid down speed")
|
|
}
|
|
return &Hysteria{
|
|
myOutboundAdapter: myOutboundAdapter{
|
|
protocol: C.TypeHysteria,
|
|
network: options.Network.Build(),
|
|
router: router,
|
|
logger: logger,
|
|
tag: tag,
|
|
},
|
|
ctx: ctx,
|
|
dialer: dialer.New(router, options.DialerOptions),
|
|
serverAddr: options.ServerOptions.Build(),
|
|
tlsConfig: tlsConfig,
|
|
quicConfig: quicConfig,
|
|
authKey: auth,
|
|
xplusKey: xplus,
|
|
sendBPS: up,
|
|
recvBPS: down,
|
|
}, nil
|
|
}
|
|
|
|
func (h *Hysteria) offer(ctx context.Context) (quic.Connection, error) {
|
|
conn := h.conn
|
|
if conn != nil && !common.Done(conn.Context()) {
|
|
return conn, nil
|
|
}
|
|
h.connAccess.Lock()
|
|
defer h.connAccess.Unlock()
|
|
h.udpAccess.Lock()
|
|
defer h.udpAccess.Unlock()
|
|
conn = h.conn
|
|
if conn != nil && !common.Done(conn.Context()) {
|
|
return conn, nil
|
|
}
|
|
conn, err := h.offerNew(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
h.conn = conn
|
|
if common.Contains(h.network, N.NetworkUDP) {
|
|
for _, session := range h.udpSessions {
|
|
close(session)
|
|
}
|
|
h.udpSessions = make(map[uint32]chan *hysteria.UDPMessage)
|
|
h.udpDefragger = hysteria.Defragger{}
|
|
go h.udpRecvLoop(conn)
|
|
}
|
|
return conn, nil
|
|
}
|
|
|
|
func (h *Hysteria) offerNew(ctx context.Context) (quic.Connection, error) {
|
|
udpConn, err := h.dialer.DialContext(h.ctx, "udp", h.serverAddr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var packetConn net.PacketConn
|
|
packetConn = bufio.NewUnbindPacketConn(udpConn)
|
|
if h.xplusKey != nil {
|
|
packetConn = hysteria.NewXPlusPacketConn(packetConn, h.xplusKey)
|
|
}
|
|
packetConn = &hysteria.PacketConnWrapper{PacketConn: packetConn}
|
|
quicConn, err := quic.Dial(packetConn, udpConn.RemoteAddr(), h.serverAddr.AddrString(), h.tlsConfig, h.quicConfig)
|
|
if err != nil {
|
|
packetConn.Close()
|
|
return nil, err
|
|
}
|
|
controlStream, err := quicConn.OpenStreamSync(ctx)
|
|
if err != nil {
|
|
packetConn.Close()
|
|
return nil, err
|
|
}
|
|
err = hysteria.WriteClientHello(controlStream, hysteria.ClientHello{
|
|
SendBPS: h.sendBPS,
|
|
RecvBPS: h.recvBPS,
|
|
Auth: h.authKey,
|
|
})
|
|
if err != nil {
|
|
packetConn.Close()
|
|
return nil, err
|
|
}
|
|
serverHello, err := hysteria.ReadServerHello(controlStream)
|
|
if err != nil {
|
|
packetConn.Close()
|
|
return nil, err
|
|
}
|
|
if !serverHello.OK {
|
|
packetConn.Close()
|
|
return nil, E.New("remote error: ", serverHello.Message)
|
|
}
|
|
quicConn.SetCongestionControl(hysteria.NewBrutalSender(congestion.ByteCount(serverHello.RecvBPS)))
|
|
return quicConn, nil
|
|
}
|
|
|
|
func (h *Hysteria) udpRecvLoop(conn quic.Connection) {
|
|
for {
|
|
packet, err := conn.ReceiveMessage()
|
|
if err != nil {
|
|
return
|
|
}
|
|
message, err := hysteria.ParseUDPMessage(packet)
|
|
if err != nil {
|
|
h.logger.Error("parse udp message: ", err)
|
|
continue
|
|
}
|
|
dfMsg := h.udpDefragger.Feed(message)
|
|
if dfMsg == nil {
|
|
continue
|
|
}
|
|
h.udpAccess.RLock()
|
|
ch, ok := h.udpSessions[dfMsg.SessionID]
|
|
if ok {
|
|
select {
|
|
case ch <- dfMsg:
|
|
// OK
|
|
default:
|
|
// Silently drop the message when the channel is full
|
|
}
|
|
}
|
|
h.udpAccess.RUnlock()
|
|
}
|
|
}
|
|
|
|
func (h *Hysteria) Close() error {
|
|
h.connAccess.Lock()
|
|
defer h.connAccess.Unlock()
|
|
h.udpAccess.Lock()
|
|
defer h.udpAccess.Unlock()
|
|
if h.conn != nil {
|
|
h.conn.CloseWithError(0, "")
|
|
}
|
|
for _, session := range h.udpSessions {
|
|
close(session)
|
|
}
|
|
h.udpSessions = make(map[uint32]chan *hysteria.UDPMessage)
|
|
return nil
|
|
}
|
|
|
|
func (h *Hysteria) open(ctx context.Context) (quic.Connection, quic.Stream, error) {
|
|
conn, err := h.offer(ctx)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
stream, err := conn.OpenStream()
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
return conn, &hysteria.StreamWrapper{Stream: stream}, nil
|
|
}
|
|
|
|
func (h *Hysteria) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
|
|
switch N.NetworkName(network) {
|
|
case N.NetworkTCP:
|
|
h.logger.InfoContext(ctx, "outbound connection to ", destination)
|
|
_, stream, err := h.open(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
err = hysteria.WriteClientRequest(stream, hysteria.ClientRequest{
|
|
Host: destination.AddrString(),
|
|
Port: destination.Port,
|
|
})
|
|
if err != nil {
|
|
stream.Close()
|
|
return nil, err
|
|
}
|
|
return hysteria.NewConn(stream, destination, true), nil
|
|
case N.NetworkUDP:
|
|
conn, err := h.ListenPacket(ctx, destination)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return conn.(*hysteria.PacketConn), nil
|
|
default:
|
|
return nil, E.New("unsupported network: ", network)
|
|
}
|
|
}
|
|
|
|
func (h *Hysteria) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
|
|
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
|
|
conn, stream, err := h.open(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
err = hysteria.WriteClientRequest(stream, hysteria.ClientRequest{
|
|
UDP: true,
|
|
Host: destination.AddrString(),
|
|
Port: destination.Port,
|
|
})
|
|
if err != nil {
|
|
stream.Close()
|
|
return nil, err
|
|
}
|
|
var response *hysteria.ServerResponse
|
|
response, err = hysteria.ReadServerResponse(stream)
|
|
if err != nil {
|
|
stream.Close()
|
|
return nil, err
|
|
}
|
|
if !response.OK {
|
|
stream.Close()
|
|
return nil, E.New("remote error: ", response.Message)
|
|
}
|
|
h.udpAccess.Lock()
|
|
nCh := make(chan *hysteria.UDPMessage, 1024)
|
|
h.udpSessions[response.UDPSessionID] = nCh
|
|
h.udpAccess.Unlock()
|
|
packetConn := hysteria.NewPacketConn(conn, stream, response.UDPSessionID, destination, nCh, common.Closer(func() error {
|
|
h.udpAccess.Lock()
|
|
if ch, ok := h.udpSessions[response.UDPSessionID]; ok {
|
|
close(ch)
|
|
delete(h.udpSessions, response.UDPSessionID)
|
|
}
|
|
h.udpAccess.Unlock()
|
|
return nil
|
|
}))
|
|
go packetConn.Hold()
|
|
return packetConn, nil
|
|
}
|
|
|
|
func (h *Hysteria) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
|
|
return NewConnection(ctx, h, conn, metadata)
|
|
}
|
|
|
|
func (h *Hysteria) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
|
|
return NewPacketConnection(ctx, h, conn, metadata)
|
|
}
|