335 lines
9.3 KiB
Go
335 lines
9.3 KiB
Go
//go:build with_quic
|
|
|
|
package inbound
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/sagernet/quic-go"
|
|
"github.com/sagernet/quic-go/congestion"
|
|
"github.com/sagernet/sing-box/adapter"
|
|
"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/auth"
|
|
E "github.com/sagernet/sing/common/exceptions"
|
|
F "github.com/sagernet/sing/common/format"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
N "github.com/sagernet/sing/common/network"
|
|
|
|
"golang.org/x/exp/slices"
|
|
)
|
|
|
|
var _ adapter.Inbound = (*Hysteria)(nil)
|
|
|
|
type Hysteria struct {
|
|
myInboundAdapter
|
|
quicConfig *quic.Config
|
|
tlsConfig tls.ServerConfig
|
|
authKey []string
|
|
authUser []string
|
|
xplusKey []byte
|
|
sendBPS uint64
|
|
recvBPS uint64
|
|
listener quic.Listener
|
|
udpAccess sync.RWMutex
|
|
udpSessionId uint32
|
|
udpSessions map[uint32]chan *hysteria.UDPMessage
|
|
udpDefragger hysteria.Defragger
|
|
}
|
|
|
|
func NewHysteria(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.HysteriaInboundOptions) (*Hysteria, error) {
|
|
options.UDPFragmentDefault = true
|
|
quicConfig := &quic.Config{
|
|
InitialStreamReceiveWindow: options.ReceiveWindowConn,
|
|
MaxStreamReceiveWindow: options.ReceiveWindowConn,
|
|
InitialConnectionReceiveWindow: options.ReceiveWindowClient,
|
|
MaxConnectionReceiveWindow: options.ReceiveWindowClient,
|
|
MaxIncomingStreams: int64(options.MaxConnClient),
|
|
KeepAlivePeriod: hysteria.KeepAlivePeriod,
|
|
DisablePathMTUDiscovery: options.DisableMTUDiscovery || !(C.IsLinux || C.IsWindows),
|
|
EnableDatagrams: true,
|
|
}
|
|
if options.ReceiveWindowConn == 0 {
|
|
quicConfig.InitialStreamReceiveWindow = hysteria.DefaultStreamReceiveWindow
|
|
quicConfig.MaxStreamReceiveWindow = hysteria.DefaultStreamReceiveWindow
|
|
}
|
|
if options.ReceiveWindowClient == 0 {
|
|
quicConfig.InitialConnectionReceiveWindow = hysteria.DefaultConnectionReceiveWindow
|
|
quicConfig.MaxConnectionReceiveWindow = hysteria.DefaultConnectionReceiveWindow
|
|
}
|
|
if quicConfig.MaxIncomingStreams == 0 {
|
|
quicConfig.MaxIncomingStreams = hysteria.DefaultMaxIncomingStreams
|
|
}
|
|
authKey := common.Map(options.Users, func(it option.HysteriaUser) string {
|
|
if len(it.Auth) > 0 {
|
|
return string(it.Auth)
|
|
} else {
|
|
return it.AuthString
|
|
}
|
|
})
|
|
authUser := common.Map(options.Users, func(it option.HysteriaUser) string {
|
|
return it.Name
|
|
})
|
|
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")
|
|
}
|
|
inbound := &Hysteria{
|
|
myInboundAdapter: myInboundAdapter{
|
|
protocol: C.TypeHysteria,
|
|
network: []string{N.NetworkUDP},
|
|
ctx: ctx,
|
|
router: router,
|
|
logger: logger,
|
|
tag: tag,
|
|
listenOptions: options.ListenOptions,
|
|
},
|
|
quicConfig: quicConfig,
|
|
authKey: authKey,
|
|
authUser: authUser,
|
|
xplusKey: xplus,
|
|
sendBPS: up,
|
|
recvBPS: down,
|
|
udpSessions: make(map[uint32]chan *hysteria.UDPMessage),
|
|
}
|
|
if options.TLS == nil || !options.TLS.Enabled {
|
|
return nil, C.ErrTLSRequired
|
|
}
|
|
if len(options.TLS.ALPN) == 0 {
|
|
options.TLS.ALPN = []string{hysteria.DefaultALPN}
|
|
}
|
|
tlsConfig, err := tls.NewServer(ctx, router, logger, common.PtrValueOrDefault(options.TLS))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
inbound.tlsConfig = tlsConfig
|
|
return inbound, nil
|
|
}
|
|
|
|
func (h *Hysteria) Start() error {
|
|
packetConn, err := h.myInboundAdapter.ListenUDP()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if len(h.xplusKey) > 0 {
|
|
packetConn = hysteria.NewXPlusPacketConn(packetConn, h.xplusKey)
|
|
packetConn = &hysteria.PacketConnWrapper{PacketConn: packetConn}
|
|
}
|
|
err = h.tlsConfig.Start()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
rawConfig, err := h.tlsConfig.Config()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
listener, err := quic.Listen(packetConn, rawConfig, h.quicConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
h.listener = listener
|
|
h.logger.Info("udp server started at ", listener.Addr())
|
|
go h.acceptLoop()
|
|
return nil
|
|
}
|
|
|
|
func (h *Hysteria) acceptLoop() {
|
|
for {
|
|
ctx := log.ContextWithNewID(h.ctx)
|
|
conn, err := h.listener.Accept(ctx)
|
|
if err != nil {
|
|
return
|
|
}
|
|
go func() {
|
|
hErr := h.accept(ctx, conn)
|
|
if hErr != nil {
|
|
conn.CloseWithError(0, "")
|
|
NewError(h.logger, ctx, E.Cause(hErr, "process connection from ", conn.RemoteAddr()))
|
|
}
|
|
}()
|
|
}
|
|
}
|
|
|
|
func (h *Hysteria) accept(ctx context.Context, conn quic.Connection) error {
|
|
controlStream, err := conn.AcceptStream(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
clientHello, err := hysteria.ReadClientHello(controlStream)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
userIndex := slices.Index(h.authKey, string(clientHello.Auth))
|
|
if userIndex == -1 {
|
|
err = hysteria.WriteServerHello(controlStream, hysteria.ServerHello{
|
|
Message: "wrong password",
|
|
})
|
|
return E.Errors(E.New("wrong password: ", string(clientHello.Auth)), err)
|
|
}
|
|
user := h.authUser[userIndex]
|
|
if user == "" {
|
|
user = F.ToString(userIndex)
|
|
} else {
|
|
ctx = auth.ContextWithUser(ctx, user)
|
|
}
|
|
h.logger.InfoContext(ctx, "[", user, "] inbound connection from ", conn.RemoteAddr())
|
|
h.logger.DebugContext(ctx, "peer send speed: ", clientHello.SendBPS/1024/1024, " MBps, peer recv speed: ", clientHello.RecvBPS/1024/1024, " MBps")
|
|
if clientHello.SendBPS == 0 || clientHello.RecvBPS == 0 {
|
|
return E.New("invalid rate from client")
|
|
}
|
|
serverSendBPS, serverRecvBPS := clientHello.RecvBPS, clientHello.SendBPS
|
|
if h.sendBPS > 0 && serverSendBPS > h.sendBPS {
|
|
serverSendBPS = h.sendBPS
|
|
}
|
|
if h.recvBPS > 0 && serverRecvBPS > h.recvBPS {
|
|
serverRecvBPS = h.recvBPS
|
|
}
|
|
err = hysteria.WriteServerHello(controlStream, hysteria.ServerHello{
|
|
OK: true,
|
|
SendBPS: serverSendBPS,
|
|
RecvBPS: serverRecvBPS,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
conn.SetCongestionControl(hysteria.NewBrutalSender(congestion.ByteCount(serverSendBPS)))
|
|
go h.udpRecvLoop(conn)
|
|
for {
|
|
var stream quic.Stream
|
|
stream, err = conn.AcceptStream(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
go func() {
|
|
hErr := h.acceptStream(ctx, conn /*&hysteria.StreamWrapper{Stream: stream}*/, stream)
|
|
if hErr != nil {
|
|
stream.Close()
|
|
NewError(h.logger, ctx, E.Cause(hErr, "process stream from ", conn.RemoteAddr()))
|
|
}
|
|
}()
|
|
}
|
|
}
|
|
|
|
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) acceptStream(ctx context.Context, conn quic.Connection, stream quic.Stream) error {
|
|
request, err := hysteria.ReadClientRequest(stream)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var metadata adapter.InboundContext
|
|
metadata.Inbound = h.tag
|
|
metadata.InboundType = C.TypeHysteria
|
|
metadata.InboundOptions = h.listenOptions.InboundOptions
|
|
metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr()).Unwrap()
|
|
metadata.OriginDestination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
|
|
metadata.Destination = M.ParseSocksaddrHostPort(request.Host, request.Port).Unwrap()
|
|
|
|
if !request.UDP {
|
|
err = hysteria.WriteServerResponse(stream, hysteria.ServerResponse{
|
|
OK: true,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
h.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination)
|
|
return h.router.RouteConnection(ctx, hysteria.NewConn(stream, metadata.Destination, false), metadata)
|
|
} else {
|
|
h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
|
|
var id uint32
|
|
h.udpAccess.Lock()
|
|
id = h.udpSessionId
|
|
nCh := make(chan *hysteria.UDPMessage, 1024)
|
|
h.udpSessions[id] = nCh
|
|
h.udpSessionId += 1
|
|
h.udpAccess.Unlock()
|
|
err = hysteria.WriteServerResponse(stream, hysteria.ServerResponse{
|
|
OK: true,
|
|
UDPSessionID: id,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
packetConn := hysteria.NewPacketConn(conn, stream, id, metadata.Destination, nCh, common.Closer(func() error {
|
|
h.udpAccess.Lock()
|
|
if ch, ok := h.udpSessions[id]; ok {
|
|
close(ch)
|
|
delete(h.udpSessions, id)
|
|
}
|
|
h.udpAccess.Unlock()
|
|
return nil
|
|
}))
|
|
go packetConn.Hold()
|
|
return h.router.RoutePacketConnection(ctx, packetConn, metadata)
|
|
}
|
|
}
|
|
|
|
func (h *Hysteria) Close() error {
|
|
h.udpAccess.Lock()
|
|
for _, session := range h.udpSessions {
|
|
close(session)
|
|
}
|
|
h.udpSessions = make(map[uint32]chan *hysteria.UDPMessage)
|
|
h.udpAccess.Unlock()
|
|
return common.Close(
|
|
&h.myInboundAdapter,
|
|
h.listener,
|
|
h.tlsConfig,
|
|
)
|
|
}
|