mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-10-31 00:08:08 -04:00
156 lines
4.0 KiB
Go
156 lines
4.0 KiB
Go
package vmess
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import (
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"crypto/md5"
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"io"
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"net"
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"strconv"
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"sync"
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"time"
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"github.com/v2ray/v2ray-core"
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v2io "github.com/v2ray/v2ray-core/common/io"
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"github.com/v2ray/v2ray-core/common/log"
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v2net "github.com/v2ray/v2ray-core/common/net"
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"github.com/v2ray/v2ray-core/proxy/vmess/protocol"
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"github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
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)
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const (
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requestReadTimeOut = 4 * time.Second
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)
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var (
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zeroTime time.Time
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)
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type VMessInboundHandler struct {
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vPoint *core.Point
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clients user.UserSet
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accepting bool
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udpEnabled bool
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}
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func NewVMessInboundHandler(vp *core.Point, clients user.UserSet, udpEnabled bool) *VMessInboundHandler {
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return &VMessInboundHandler{
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vPoint: vp,
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clients: clients,
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udpEnabled: udpEnabled,
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}
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}
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func (handler *VMessInboundHandler) Listen(port uint16) error {
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listener, err := net.Listen("tcp", ":"+strconv.Itoa(int(port)))
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if err != nil {
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return log.Error("Unable to listen tcp:%d", port)
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}
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handler.accepting = true
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go handler.AcceptConnections(listener)
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if handler.udpEnabled {
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handler.ListenUDP(port)
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}
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return nil
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}
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func (handler *VMessInboundHandler) AcceptConnections(listener net.Listener) error {
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for handler.accepting {
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connection, err := listener.Accept()
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if err != nil {
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return log.Error("Failed to accpet connection: %s", err.Error())
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}
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go handler.HandleConnection(connection)
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}
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return nil
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}
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func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error {
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defer connection.Close()
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connReader := v2net.NewTimeOutReader(120, connection)
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requestReader := protocol.NewVMessRequestReader(handler.clients)
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request, err := requestReader.Read(connReader)
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if err != nil {
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log.Warning("VMessIn: Invalid request from (%s): %v", connection.RemoteAddr().String(), err)
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return err
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}
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log.Debug("VMessIn: Received request for %s", request.Address.String())
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ray := handler.vPoint.DispatchToOutbound(v2net.NewPacket(request.Destination(), nil, true))
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input := ray.InboundInput()
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output := ray.InboundOutput()
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var readFinish, writeFinish sync.Mutex
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readFinish.Lock()
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writeFinish.Lock()
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go handleInput(request, connReader, input, &readFinish)
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responseKey := md5.Sum(request.RequestKey)
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responseIV := md5.Sum(request.RequestIV)
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responseWriter, err := v2io.NewAesEncryptWriter(responseKey[:], responseIV[:], connection)
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if err != nil {
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return log.Error("VMessIn: Failed to create encrypt writer: %v", err)
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}
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// Optimize for small response packet
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buffer := make([]byte, 0, 4*1024)
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buffer = append(buffer, request.ResponseHeader...)
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if data, open := <-output; open {
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buffer = append(buffer, data...)
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responseWriter.Write(buffer)
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go handleOutput(request, responseWriter, output, &writeFinish)
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writeFinish.Lock()
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}
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if tcpConn, ok := connection.(*net.TCPConn); ok {
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tcpConn.CloseWrite()
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}
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readFinish.Lock()
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return nil
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}
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func handleInput(request *protocol.VMessRequest, reader io.Reader, input chan<- []byte, finish *sync.Mutex) {
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defer close(input)
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defer finish.Unlock()
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requestReader, err := v2io.NewAesDecryptReader(request.RequestKey, request.RequestIV, reader)
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if err != nil {
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log.Error("VMessIn: Failed to create decrypt reader: %v", err)
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return
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}
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v2net.ReaderToChan(input, requestReader)
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}
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func handleOutput(request *protocol.VMessRequest, writer io.Writer, output <-chan []byte, finish *sync.Mutex) {
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v2net.ChanToWriter(writer, output)
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finish.Unlock()
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}
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type VMessInboundHandlerFactory struct {
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}
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func (factory *VMessInboundHandlerFactory) Create(vp *core.Point, rawConfig interface{}) (core.InboundConnectionHandler, error) {
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config := rawConfig.(*VMessInboundConfig)
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allowedClients := user.NewTimedUserSet()
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for _, client := range config.AllowedClients {
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user, err := client.ToUser()
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if err != nil {
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panic(log.Error("VMessIn: Failed to parse user id %s: %v", client.Id, err))
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}
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allowedClients.AddUser(user)
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}
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return NewVMessInboundHandler(vp, allowedClients, config.UDPEnabled), nil
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}
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func init() {
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core.RegisterInboundConnectionHandlerFactory("vmess", &VMessInboundHandlerFactory{})
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}
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