func (h *Handler) Dial(ctx context.Context, dest v2net.Destination) (internet.Connection, error) {
if h.senderSettings != nil {
if h.senderSettings.ProxySettings.HasTag() {
tag := h.senderSettings.ProxySettings.Tag
handler := h.outboundManager.GetHandler(tag)
if handler != nil {
log.Info("Proxyman|OutboundHandler: Proxying to ", tag)
ctx = proxy.ContextWithDestination(ctx, dest)
stream := ray.NewRay(ctx)
go handler.Dispatch(ctx, stream)
return NewConnection(stream), nil
}
log.Warning("Proxyman|OutboundHandler: Failed to get outbound handler with tag: ", tag)
}
if h.senderSettings.Via != nil {
ctx = internet.ContextWithDialerSource(ctx, h.senderSettings.Via.AsAddress())
}
if h.senderSettings != nil {
ctx = internet.ContextWithStreamSettings(ctx, h.senderSettings.StreamSettings)
}
}
return internet.Dial(ctx, dest)
}
func (this *FreedomConnection) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
log.Info("Freedom: Opening connection to ", destination)
defer payload.Release()
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
var conn internet.Connection
if this.domainStrategy == Config_USE_IP && destination.Address.Family().IsDomain() {
destination = this.ResolveIP(destination)
}
err := retry.ExponentialBackoff(5, 100).On(func() error {
rawConn, err := internet.Dial(this.meta.Address, destination, this.meta.GetDialerOptions())
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("Freedom: Failed to open connection to ", destination, ": ", err)
return err
}
defer conn.Close()
input := ray.OutboundInput()
output := ray.OutboundOutput()
if !payload.IsEmpty() {
conn.Write(payload.Value)
}
go func() {
v2writer := v2io.NewAdaptiveWriter(conn)
defer v2writer.Release()
v2io.Pipe(input, v2writer)
if tcpConn, ok := conn.(*tcp.RawConnection); ok {
tcpConn.CloseWrite()
}
}()
var reader io.Reader = conn
timeout := this.timeout
if destination.Network == v2net.Network_UDP {
timeout = 16
}
if timeout > 0 {
reader = v2net.NewTimeOutReader(timeout /* seconds */, conn)
}
v2reader := v2io.NewAdaptiveReader(reader)
v2io.Pipe(v2reader, output)
v2reader.Release()
ray.OutboundOutput().Close()
return nil
}
func (this *VMessOutboundHandler) Dispatch(target v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
var rec *protocol.ServerSpec
var conn internet.Connection
err := retry.Timed(5, 100).On(func() error {
rec = this.serverPicker.PickServer()
rawConn, err := internet.Dial(this.meta.Address, rec.Destination(), this.meta.StreamSettings)
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Error("VMess|Outbound: Failed to find an available destination:", err)
return err
}
log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())
command := protocol.RequestCommandTCP
if target.IsUDP() {
command = protocol.RequestCommandUDP
}
request := &protocol.RequestHeader{
Version: encoding.Version,
User: rec.PickUser(),
Command: command,
Address: target.Address(),
Port: target.Port(),
Option: protocol.RequestOptionChunkStream,
}
defer conn.Close()
conn.SetReusable(true)
if conn.Reusable() { // Conn reuse may be disabled on transportation layer
request.Option.Set(protocol.RequestOptionConnectionReuse)
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
var requestFinish, responseFinish sync.Mutex
requestFinish.Lock()
responseFinish.Lock()
session := encoding.NewClientSession(protocol.DefaultIDHash)
go this.handleRequest(session, conn, request, payload, input, &requestFinish)
go this.handleResponse(session, conn, request, rec.Destination(), output, &responseFinish)
requestFinish.Lock()
responseFinish.Lock()
return nil
}
func (v *OutboundProxy) Dial(src v2net.Address, dest v2net.Destination, options internet.DialerOptions) (internet.Connection, error) {
handler := v.outboundManager.GetHandler(options.Proxy.Tag)
if handler == nil {
log.Warning("Proxy: Failed to get outbound handler with tag: ", options.Proxy.Tag)
return internet.Dial(src, dest, internet.DialerOptions{
Stream: options.Stream,
})
}
log.Info("Proxy: Dialing to ", dest)
stream := ray.NewRay()
go handler.Dispatch(dest, nil, stream)
return NewProxyConnection(src, dest, stream), nil
}
func (this *Client) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
defer payload.Release()
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
network := destination.Network
var server *protocol.ServerSpec
var conn internet.Connection
err := retry.ExponentialBackoff(5, 100).On(func() error {
server = this.serverPicker.PickServer()
dest := server.Destination()
dest.Network = network
rawConn, err := internet.Dial(this.meta.Address, dest, this.meta.GetDialerOptions())
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
return errors.New("Shadowsocks|Client: Failed to find an available destination:" + err.Error())
}
log.Info("Shadowsocks|Client: Tunneling request to ", destination, " via ", server.Destination())
conn.SetReusable(false)
request := &protocol.RequestHeader{
Version: Version,
Address: destination.Address,
Port: destination.Port,
}
if destination.Network == v2net.Network_TCP {
request.Command = protocol.RequestCommandTCP
} else {
request.Command = protocol.RequestCommandUDP
}
user := server.PickUser()
rawAccount, err := user.GetTypedAccount()
if err != nil {
return errors.New("Shadowsocks|Client: Failed to get a valid user account: " + err.Error())
}
account := rawAccount.(*ShadowsocksAccount)
request.User = user
if account.OneTimeAuth == Account_Auto || account.OneTimeAuth == Account_Enabled {
request.Option |= RequestOptionOneTimeAuth
}
if request.Command == protocol.RequestCommandTCP {
bufferedWriter := v2io.NewBufferedWriter(conn)
defer bufferedWriter.Release()
bodyWriter, err := WriteTCPRequest(request, bufferedWriter)
defer bodyWriter.Release()
if err != nil {
return errors.New("Shadowsock|Client: Failed to write request: " + err.Error())
}
if err := bodyWriter.Write(payload); err != nil {
return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
}
var responseMutex sync.Mutex
responseMutex.Lock()
go func() {
defer responseMutex.Unlock()
responseReader, err := ReadTCPResponse(user, conn)
if err != nil {
log.Warning("Shadowsocks|Client: Failed to read response: " + err.Error())
return
}
v2io.Pipe(responseReader, ray.OutboundOutput())
}()
bufferedWriter.SetCached(false)
v2io.Pipe(ray.OutboundInput(), bodyWriter)
responseMutex.Lock()
}
if request.Command == protocol.RequestCommandUDP {
timedReader := v2net.NewTimeOutReader(16, conn)
var responseMutex sync.Mutex
responseMutex.Lock()
go func() {
defer responseMutex.Unlock()
reader := &UDPReader{
Reader: timedReader,
User: user,
}
v2io.Pipe(reader, ray.OutboundOutput())
}()
writer := &UDPWriter{
Writer: conn,
Request: request,
}
if !payload.IsEmpty() {
if err := writer.Write(payload); err != nil {
return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
}
}
v2io.Pipe(ray.OutboundInput(), writer)
responseMutex.Lock()
}
return nil
}
func (v *VMessOutboundHandler) Dispatch(target v2net.Destination, payload *buf.Buffer, ray ray.OutboundRay) {
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
var rec *protocol.ServerSpec
var conn internet.Connection
err := retry.ExponentialBackoff(5, 100).On(func() error {
rec = v.serverPicker.PickServer()
rawConn, err := internet.Dial(v.meta.Address, rec.Destination(), v.meta.GetDialerOptions())
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("VMess|Outbound: Failed to find an available destination:", err)
return
}
log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())
command := protocol.RequestCommandTCP
if target.Network == v2net.Network_UDP {
command = protocol.RequestCommandUDP
}
request := &protocol.RequestHeader{
Version: encoding.Version,
User: rec.PickUser(),
Command: command,
Address: target.Address,
Port: target.Port,
Option: protocol.RequestOptionChunkStream,
}
rawAccount, err := request.User.GetTypedAccount()
if err != nil {
log.Warning("VMess|Outbound: Failed to get user account: ", err)
}
account := rawAccount.(*vmess.InternalAccount)
request.Security = account.Security
defer conn.Close()
conn.SetReusable(true)
if conn.Reusable() { // Conn reuse may be disabled on transportation layer
request.Option.Set(protocol.RequestOptionConnectionReuse)
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
var requestFinish, responseFinish sync.Mutex
requestFinish.Lock()
responseFinish.Lock()
session := encoding.NewClientSession(protocol.DefaultIDHash)
go v.handleRequest(session, conn, request, payload, input, &requestFinish)
go v.handleResponse(session, conn, request, rec.Destination(), output, &responseFinish)
requestFinish.Lock()
responseFinish.Lock()
return
}