mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-09-07 04:24:23 -04:00
83 lines
1.9 KiB
Go
83 lines
1.9 KiB
Go
package udp
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import (
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"context"
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"sync"
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"v2ray.com/core/app/dispatcher"
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"v2ray.com/core/app/log"
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"v2ray.com/core/common/buf"
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"v2ray.com/core/common/net"
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"v2ray.com/core/transport/ray"
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)
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type ResponseCallback func(payload *buf.Buffer)
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type Dispatcher struct {
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sync.RWMutex
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conns map[net.Destination]ray.InboundRay
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dispatcher dispatcher.Interface
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}
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func NewDispatcher(dispatcher dispatcher.Interface) *Dispatcher {
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return &Dispatcher{
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conns: make(map[net.Destination]ray.InboundRay),
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dispatcher: dispatcher,
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}
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}
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func (v *Dispatcher) RemoveRay(dest net.Destination) {
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v.Lock()
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defer v.Unlock()
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if conn, found := v.conns[dest]; found {
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conn.InboundInput().Close()
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conn.InboundOutput().Close()
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delete(v.conns, dest)
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}
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}
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func (v *Dispatcher) getInboundRay(ctx context.Context, dest net.Destination) (ray.InboundRay, bool) {
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v.Lock()
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defer v.Unlock()
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if entry, found := v.conns[dest]; found {
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return entry, true
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}
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log.Trace(newError("establishing new connection for ", dest))
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inboundRay, _ := v.dispatcher.Dispatch(ctx, dest)
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v.conns[dest] = inboundRay
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return inboundRay, false
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}
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func (v *Dispatcher) Dispatch(ctx context.Context, destination net.Destination, payload *buf.Buffer, callback ResponseCallback) {
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// TODO: Add user to destString
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log.Trace(newError("dispatch request to: ", destination).AtDebug())
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inboundRay, existing := v.getInboundRay(ctx, destination)
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outputStream := inboundRay.InboundInput()
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if outputStream != nil {
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if err := outputStream.Write(buf.NewMultiBufferValue(payload)); err != nil {
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v.RemoveRay(destination)
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}
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}
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if !existing {
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go func() {
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handleInput(inboundRay.InboundOutput(), callback)
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v.RemoveRay(destination)
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}()
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}
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}
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func handleInput(input ray.InputStream, callback ResponseCallback) {
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for {
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mb, err := input.Read()
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if err != nil {
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break
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}
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for _, b := range mb {
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callback(b)
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}
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}
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}
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