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vmessin.go
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vmessin.go
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package vmess
import (
"crypto/md5"
"io"
"net"
"sync"
"github.com/v2ray/v2ray-core/app"
"github.com/v2ray/v2ray-core/common/alloc"
v2crypto "github.com/v2ray/v2ray-core/common/crypto"
"github.com/v2ray/v2ray-core/common/log"
v2net "github.com/v2ray/v2ray-core/common/net"
"github.com/v2ray/v2ray-core/common/retry"
"github.com/v2ray/v2ray-core/proxy/common/connhandler"
"github.com/v2ray/v2ray-core/proxy/vmess/config"
"github.com/v2ray/v2ray-core/proxy/vmess/protocol"
"github.com/v2ray/v2ray-core/proxy/vmess/protocol/user"
)
type VMessInboundHandler struct {
dispatcher app.PacketDispatcher
clients user.UserSet
accepting bool
}
func NewVMessInboundHandler(dispatcher app.PacketDispatcher, clients user.UserSet) *VMessInboundHandler {
return &VMessInboundHandler{
dispatcher: dispatcher,
clients: clients,
}
}
func (handler *VMessInboundHandler) Listen(port uint16) error {
listener, err := net.ListenTCP("tcp", &net.TCPAddr{
IP: []byte{0, 0, 0, 0},
Port: int(port),
Zone: "",
})
if err != nil {
log.Error("Unable to listen tcp port %d: %v", port, err)
return err
}
handler.accepting = true
go handler.AcceptConnections(listener)
return nil
}
func (handler *VMessInboundHandler) AcceptConnections(listener *net.TCPListener) error {
for handler.accepting {
retry.Timed(100 /* times */, 100 /* ms */).On(func() error {
connection, err := listener.AcceptTCP()
if err != nil {
log.Error("Failed to accpet connection: %s", err.Error())
return err
}
go handler.HandleConnection(connection)
return nil
})
}
return nil
}
func (handler *VMessInboundHandler) HandleConnection(connection *net.TCPConn) error {
defer connection.Close()
connReader := v2net.NewTimeOutReader(16, connection)
requestReader := protocol.NewVMessRequestReader(handler.clients)
request, err := requestReader.Read(connReader)
if err != nil {
log.Access(connection.RemoteAddr().String(), "", log.AccessRejected, err.Error())
log.Warning("VMessIn: Invalid request from (%s): %v", connection.RemoteAddr().String(), err)
return err
}
log.Access(connection.RemoteAddr().String(), request.Address.String(), log.AccessAccepted, "")
log.Debug("VMessIn: Received request for %s", request.Address.String())
ray := handler.dispatcher.DispatchToOutbound(v2net.NewPacket(request.Destination(), nil, true))
input := ray.InboundInput()
output := ray.InboundOutput()
var readFinish, writeFinish sync.Mutex
readFinish.Lock()
writeFinish.Lock()
userSettings := config.GetUserSettings(request.User.Level())
connReader.SetTimeOut(userSettings.PayloadReadTimeout)
go handleInput(request, connReader, input, &readFinish)
responseKey := md5.Sum(request.RequestKey)
responseIV := md5.Sum(request.RequestIV)
aesStream, err := v2crypto.NewAesEncryptionStream(responseKey[:], responseIV[:])
if err != nil {
log.Error("VMessIn: Failed to create AES decryption stream: %v", err)
return err
}
responseWriter := v2crypto.NewCryptionWriter(aesStream, connection)
// Optimize for small response packet
buffer := alloc.NewLargeBuffer().Clear()
buffer.Append(request.ResponseHeader)
if data, open := <-output; open {
buffer.Append(data.Value)
data.Release()
responseWriter.Write(buffer.Value)
buffer.Release()
go handleOutput(request, responseWriter, output, &writeFinish)
writeFinish.Lock()
}
connection.CloseWrite()
readFinish.Lock()
return nil
}
func handleInput(request *protocol.VMessRequest, reader io.Reader, input chan<- *alloc.Buffer, finish *sync.Mutex) {
defer close(input)
defer finish.Unlock()
aesStream, err := v2crypto.NewAesDecryptionStream(request.RequestKey, request.RequestIV)
if err != nil {
log.Error("VMessIn: Failed to create AES decryption stream: %v", err)
return
}
requestReader := v2crypto.NewCryptionReader(aesStream, reader)
v2net.ReaderToChan(input, requestReader)
}
func handleOutput(request *protocol.VMessRequest, writer io.Writer, output <-chan *alloc.Buffer, finish *sync.Mutex) {
v2net.ChanToWriter(writer, output)
finish.Unlock()
}
type VMessInboundHandlerFactory struct {
}
func (factory *VMessInboundHandlerFactory) Create(dispatcher app.PacketDispatcher, rawConfig interface{}) (connhandler.InboundConnectionHandler, error) {
config := rawConfig.(config.Inbound)
allowedClients := user.NewTimedUserSet()
for _, user := range config.AllowedUsers() {
allowedClients.AddUser(user)
}
return NewVMessInboundHandler(dispatcher, allowedClients), nil
}
func init() {
connhandler.RegisterInboundConnectionHandlerFactory("vmess", &VMessInboundHandlerFactory{})
}