mirror of https://github.com/v2fly/v2ray-core.git
131 lines
3.4 KiB
Go
131 lines
3.4 KiB
Go
package dispatcher
|
|
|
|
//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg impl -path App,Dispatcher,Default
|
|
|
|
import (
|
|
"context"
|
|
"time"
|
|
|
|
"v2ray.com/core"
|
|
"v2ray.com/core/app/proxyman"
|
|
"v2ray.com/core/common"
|
|
"v2ray.com/core/common/buf"
|
|
"v2ray.com/core/common/net"
|
|
"v2ray.com/core/proxy"
|
|
"v2ray.com/core/transport/ray"
|
|
)
|
|
|
|
var (
|
|
errSniffingTimeout = newError("timeout on sniffing")
|
|
)
|
|
|
|
// DefaultDispatcher is a default implementation of Dispatcher.
|
|
type DefaultDispatcher struct {
|
|
ohm core.OutboundHandlerManager
|
|
router core.Router
|
|
}
|
|
|
|
// NewDefaultDispatcher create a new DefaultDispatcher.
|
|
func NewDefaultDispatcher(ctx context.Context, config *Config) (*DefaultDispatcher, error) {
|
|
v := core.FromContext(ctx)
|
|
if v == nil {
|
|
return nil, newError("V is not in context.")
|
|
}
|
|
|
|
d := &DefaultDispatcher{
|
|
ohm: v.OutboundHandlerManager(),
|
|
router: v.Router(),
|
|
}
|
|
|
|
if err := v.RegisterFeature((*core.Dispatcher)(nil), d); err != nil {
|
|
return nil, newError("unable to register Dispatcher")
|
|
}
|
|
return d, nil
|
|
}
|
|
|
|
// Start implements app.Application.
|
|
func (*DefaultDispatcher) Start() error {
|
|
return nil
|
|
}
|
|
|
|
// Close implements app.Application.
|
|
func (*DefaultDispatcher) Close() {}
|
|
|
|
// Dispatch implements core.Dispatcher.
|
|
func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destination) (ray.InboundRay, error) {
|
|
if !destination.IsValid() {
|
|
panic("Dispatcher: Invalid destination.")
|
|
}
|
|
ctx = proxy.ContextWithTarget(ctx, destination)
|
|
|
|
outbound := ray.NewRay(ctx)
|
|
sniferList := proxyman.ProtocoSniffersFromContext(ctx)
|
|
if destination.Address.Family().IsDomain() || len(sniferList) == 0 {
|
|
go d.routedDispatch(ctx, outbound, destination)
|
|
} else {
|
|
go func() {
|
|
domain, err := snifer(ctx, sniferList, outbound)
|
|
if err == nil {
|
|
newError("sniffed domain: ", domain).WriteToLog()
|
|
destination.Address = net.ParseAddress(domain)
|
|
ctx = proxy.ContextWithTarget(ctx, destination)
|
|
}
|
|
d.routedDispatch(ctx, outbound, destination)
|
|
}()
|
|
}
|
|
return outbound, nil
|
|
}
|
|
|
|
func snifer(ctx context.Context, sniferList []proxyman.KnownProtocols, outbound ray.OutboundRay) (string, error) {
|
|
payload := buf.New()
|
|
defer payload.Release()
|
|
|
|
sniffer := NewSniffer(sniferList)
|
|
totalAttempt := 0
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return "", ctx.Err()
|
|
default:
|
|
totalAttempt++
|
|
if totalAttempt > 5 {
|
|
return "", errSniffingTimeout
|
|
}
|
|
outbound.OutboundInput().Peek(payload)
|
|
if !payload.IsEmpty() {
|
|
domain, err := sniffer.Sniff(payload.Bytes())
|
|
if err != ErrMoreData {
|
|
return domain, err
|
|
}
|
|
}
|
|
if payload.IsFull() {
|
|
return "", ErrInvalidData
|
|
}
|
|
time.Sleep(time.Millisecond * 100)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (d *DefaultDispatcher) routedDispatch(ctx context.Context, outbound ray.OutboundRay, destination net.Destination) {
|
|
dispatcher := d.ohm.GetDefaultHandler()
|
|
if d.router != nil {
|
|
if tag, err := d.router.PickRoute(ctx); err == nil {
|
|
if handler := d.ohm.GetHandler(tag); handler != nil {
|
|
newError("taking detour [", tag, "] for [", destination, "]").WriteToLog()
|
|
dispatcher = handler
|
|
} else {
|
|
newError("nonexisting tag: ", tag).AtWarning().WriteToLog()
|
|
}
|
|
} else {
|
|
newError("default route for ", destination).WriteToLog()
|
|
}
|
|
}
|
|
dispatcher.Dispatch(ctx, outbound)
|
|
}
|
|
|
|
func init() {
|
|
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
|
|
return NewDefaultDispatcher(ctx, config.(*Config))
|
|
}))
|
|
}
|