mirror of https://github.com/v2fly/v2ray-core.git
133 lines
3.2 KiB
Go
133 lines
3.2 KiB
Go
package impl
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import (
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"context"
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"time"
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"v2ray.com/core/app"
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"v2ray.com/core/app/dispatcher"
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"v2ray.com/core/app/proxyman"
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"v2ray.com/core/app/router"
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"v2ray.com/core/common"
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"v2ray.com/core/common/buf"
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"v2ray.com/core/common/errors"
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"v2ray.com/core/common/log"
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"v2ray.com/core/proxy"
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"v2ray.com/core/transport/ray"
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)
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type DefaultDispatcher struct {
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ohm proxyman.OutboundHandlerManager
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router *router.Router
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}
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func NewDefaultDispatcher(ctx context.Context, config *dispatcher.Config) (*DefaultDispatcher, error) {
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space := app.SpaceFromContext(ctx)
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if space == nil {
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return nil, errors.New("DefaultDispatcher: No space in context.")
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}
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d := &DefaultDispatcher{}
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space.OnInitialize(func() error {
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d.ohm = proxyman.OutboundHandlerManagerFromSpace(space)
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if d.ohm == nil {
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return errors.New("DefaultDispatcher: OutboundHandlerManager is not found in the space.")
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}
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d.router = router.FromSpace(space)
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return nil
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})
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return d, nil
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}
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func (DefaultDispatcher) Interface() interface{} {
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return (*dispatcher.Interface)(nil)
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}
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func (v *DefaultDispatcher) DispatchToOutbound(ctx context.Context) ray.InboundRay {
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dispatcher := v.ohm.GetDefaultHandler()
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destination := proxy.DestinationFromContext(ctx)
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if !destination.IsValid() {
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panic("Dispatcher: Invalid destination.")
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}
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if v.router != nil {
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if tag, err := v.router.TakeDetour(ctx); err == nil {
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if handler := v.ohm.GetHandler(tag); handler != nil {
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log.Info("DefaultDispatcher: Taking detour [", tag, "] for [", destination, "].")
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dispatcher = handler
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} else {
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log.Warning("DefaultDispatcher: Nonexisting tag: ", tag)
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}
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} else {
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log.Info("DefaultDispatcher: Default route for ", destination)
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}
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}
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direct := ray.NewRay(ctx)
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var waitFunc func() error
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if allowPassiveConnection, ok := proxy.AllowPassiveConnectionFromContext(ctx); ok && allowPassiveConnection {
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waitFunc = noOpWait()
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} else {
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wdi := &waitDataInspector{
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hasData: make(chan bool, 1),
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}
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direct.AddInspector(wdi)
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waitFunc = waitForData(wdi)
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}
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go v.waitAndDispatch(ctx, waitFunc, direct, dispatcher)
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return direct
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}
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func (v *DefaultDispatcher) waitAndDispatch(ctx context.Context, wait func() error, link ray.OutboundRay, dispatcher proxyman.OutboundHandler) {
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if err := wait(); err != nil {
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log.Info("DefaultDispatcher: Failed precondition: ", err)
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link.OutboundInput().CloseError()
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link.OutboundOutput().CloseError()
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return
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}
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dispatcher.Dispatch(ctx, link)
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}
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func init() {
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common.Must(common.RegisterConfig((*dispatcher.Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
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return NewDefaultDispatcher(ctx, config.(*dispatcher.Config))
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}))
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}
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type waitDataInspector struct {
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hasData chan bool
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}
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func (wdi *waitDataInspector) Input(*buf.Buffer) {
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select {
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case wdi.hasData <- true:
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default:
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}
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}
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func (wdi *waitDataInspector) WaitForData() bool {
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select {
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case <-wdi.hasData:
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return true
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case <-time.After(time.Minute):
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return false
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}
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}
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func waitForData(wdi *waitDataInspector) func() error {
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return func() error {
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if wdi.WaitForData() {
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return nil
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}
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return errors.New("DefaultDispatcher: No data.")
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}
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}
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func noOpWait() func() error {
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return func() error {
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return nil
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}
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}
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