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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-12-23 02:26:49 -05:00
v2fly/proxy/vmess/outbound/outbound.go
2016-10-16 14:22:21 +02:00

189 lines
5.1 KiB
Go

package outbound
import (
"io"
"sync"
"v2ray.com/core/app"
"v2ray.com/core/common/alloc"
v2io "v2ray.com/core/common/io"
"v2ray.com/core/common/loader"
"v2ray.com/core/common/log"
v2net "v2ray.com/core/common/net"
"v2ray.com/core/common/protocol"
"v2ray.com/core/common/retry"
"v2ray.com/core/proxy"
"v2ray.com/core/proxy/registry"
"v2ray.com/core/proxy/vmess"
"v2ray.com/core/proxy/vmess/encoding"
vmessio "v2ray.com/core/proxy/vmess/io"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/ray"
)
type VMessOutboundHandler struct {
serverList *protocol.ServerList
serverPicker protocol.ServerPicker
meta *proxy.OutboundHandlerMeta
}
func (this *VMessOutboundHandler) Dispatch(target v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
var rec *protocol.ServerSpec
var conn internet.Connection
err := retry.Timed(5, 100).On(func() error {
rec = this.serverPicker.PickServer()
rawConn, err := internet.Dial(this.meta.Address, rec.Destination(), this.meta.StreamSettings)
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Error("VMess|Outbound: Failed to find an available destination:", err)
return err
}
log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())
command := protocol.RequestCommandTCP
if target.Network == v2net.Network_UDP {
command = protocol.RequestCommandUDP
}
request := &protocol.RequestHeader{
Version: encoding.Version,
User: rec.PickUser(),
Command: command,
Address: target.Address,
Port: target.Port,
Option: protocol.RequestOptionChunkStream,
}
defer conn.Close()
conn.SetReusable(true)
if conn.Reusable() { // Conn reuse may be disabled on transportation layer
request.Option.Set(protocol.RequestOptionConnectionReuse)
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
var requestFinish, responseFinish sync.Mutex
requestFinish.Lock()
responseFinish.Lock()
session := encoding.NewClientSession(protocol.DefaultIDHash)
go this.handleRequest(session, conn, request, payload, input, &requestFinish)
go this.handleResponse(session, conn, request, rec.Destination(), output, &responseFinish)
requestFinish.Lock()
responseFinish.Lock()
return nil
}
func (this *VMessOutboundHandler) handleRequest(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, payload *alloc.Buffer, input v2io.Reader, finish *sync.Mutex) {
defer finish.Unlock()
writer := v2io.NewBufferedWriter(conn)
defer writer.Release()
session.EncodeRequestHeader(request, writer)
bodyWriter := session.EncodeRequestBody(writer)
var streamWriter v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
if request.Option.Has(protocol.RequestOptionChunkStream) {
streamWriter = vmessio.NewAuthChunkWriter(streamWriter)
}
if !payload.IsEmpty() {
if err := streamWriter.Write(payload); err != nil {
conn.SetReusable(false)
}
}
writer.SetCached(false)
err := v2io.Pipe(input, streamWriter)
if err != io.EOF {
conn.SetReusable(false)
}
if request.Option.Has(protocol.RequestOptionChunkStream) {
err := streamWriter.Write(alloc.NewLocalBuffer(32).Clear())
if err != nil {
conn.SetReusable(false)
}
}
streamWriter.Release()
return
}
func (this *VMessOutboundHandler) handleResponse(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, dest v2net.Destination, output v2io.Writer, finish *sync.Mutex) {
defer finish.Unlock()
reader := v2io.NewBufferedReader(conn)
defer reader.Release()
header, err := session.DecodeResponseHeader(reader)
if err != nil {
conn.SetReusable(false)
log.Warning("VMess|Outbound: Failed to read response from ", request.Destination(), ": ", err)
return
}
go this.handleCommand(dest, header.Command)
if !header.Option.Has(protocol.ResponseOptionConnectionReuse) {
conn.SetReusable(false)
}
reader.SetCached(false)
decryptReader := session.DecodeResponseBody(reader)
var bodyReader v2io.Reader
if request.Option.Has(protocol.RequestOptionChunkStream) {
bodyReader = vmessio.NewAuthChunkReader(decryptReader)
} else {
bodyReader = v2io.NewAdaptiveReader(decryptReader)
}
err = v2io.Pipe(bodyReader, output)
if err != io.EOF {
conn.SetReusable(false)
}
bodyReader.Release()
return
}
type Factory struct{}
func (this *Factory) StreamCapability() v2net.NetworkList {
return v2net.NetworkList{
Network: []v2net.Network{v2net.Network_TCP, v2net.Network_KCP, v2net.Network_WebSocket},
}
}
func (this *Factory) Create(space app.Space, rawConfig interface{}, meta *proxy.OutboundHandlerMeta) (proxy.OutboundHandler, error) {
vOutConfig := rawConfig.(*Config)
serverList := protocol.NewServerList()
for _, rec := range vOutConfig.Receiver {
serverList.AddServer(protocol.NewServerSpecFromPB(vmess.NewAccount, *rec))
}
handler := &VMessOutboundHandler{
serverList: serverList,
serverPicker: protocol.NewRoundRobinServerPicker(serverList),
meta: meta,
}
return handler, nil
}
func init() {
registry.MustRegisterOutboundHandlerCreator(loader.GetType(new(Config)), new(Factory))
}