2015-12-04 11:07:32 +00:00
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package outbound
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2015-09-10 22:24:18 +00:00
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2017-04-08 23:43:25 +00:00
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//go:generate go run $GOPATH/src/v2ray.com/core/tools/generrorgen/main.go -pkg outbound -path Proxy,VMess,Outbound
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2015-09-10 22:24:18 +00:00
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import (
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2017-01-12 23:56:21 +00:00
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"context"
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2017-01-13 22:42:39 +00:00
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"time"
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2017-01-12 23:56:21 +00:00
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2016-08-20 18:55:45 +00:00
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"v2ray.com/core/app"
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2017-02-03 21:35:09 +00:00
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"v2ray.com/core/app/log"
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2016-12-27 23:53:29 +00:00
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"v2ray.com/core/common"
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2016-12-09 10:35:27 +00:00
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"v2ray.com/core/common/buf"
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2017-01-13 22:42:39 +00:00
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"v2ray.com/core/common/net"
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2016-08-20 18:55:45 +00:00
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"v2ray.com/core/common/protocol"
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"v2ray.com/core/common/retry"
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2016-12-29 23:32:20 +00:00
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"v2ray.com/core/common/signal"
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2016-08-20 18:55:45 +00:00
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"v2ray.com/core/proxy"
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2016-12-07 20:43:41 +00:00
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"v2ray.com/core/proxy/vmess"
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"v2ray.com/core/proxy/vmess/encoding"
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"v2ray.com/core/transport/internet"
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"v2ray.com/core/transport/ray"
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2015-09-10 22:24:18 +00:00
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)
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2017-02-13 12:16:37 +00:00
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// Handler is an outbound connection handler for VMess protocol.
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type Handler struct {
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serverList *protocol.ServerList
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serverPicker protocol.ServerPicker
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}
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2017-02-13 12:16:37 +00:00
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func New(ctx context.Context, config *Config) (*Handler, error) {
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space := app.SpaceFromContext(ctx)
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if space == nil {
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return nil, newError("no space in context.")
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}
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serverList := protocol.NewServerList()
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for _, rec := range config.Receiver {
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serverList.AddServer(protocol.NewServerSpecFromPB(*rec))
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}
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handler := &Handler{
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serverList: serverList,
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serverPicker: protocol.NewRoundRobinServerPicker(serverList),
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}
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return handler, nil
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}
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2017-02-13 12:16:37 +00:00
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// Process implements proxy.Outbound.Process().
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func (v *Handler) Process(ctx context.Context, outboundRay ray.OutboundRay, dialer proxy.Dialer) error {
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var rec *protocol.ServerSpec
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var conn internet.Connection
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2016-06-05 22:10:51 +00:00
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2017-02-10 10:41:50 +00:00
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err := retry.ExponentialBackoff(5, 200).On(func() error {
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2016-11-27 20:39:09 +00:00
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rec = v.serverPicker.PickServer()
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2017-01-26 19:46:44 +00:00
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rawConn, err := dialer.Dial(ctx, rec.Destination())
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2016-06-05 22:10:51 +00:00
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if err != nil {
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return err
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}
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conn = rawConn
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return nil
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})
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if err != nil {
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return newError("failed to find an available destination").Base(err).AtWarning()
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2016-06-05 22:10:51 +00:00
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}
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defer conn.Close()
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2017-02-09 21:49:38 +00:00
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target, ok := proxy.TargetFromContext(ctx)
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if !ok {
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return newError("target not specified").AtError()
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}
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log.Trace(newError("tunneling request to ", target, " via ", rec.Destination()))
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2015-09-10 22:24:18 +00:00
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2016-05-07 18:26:29 +00:00
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command := protocol.RequestCommandTCP
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if target.Network == net.Network_UDP {
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command = protocol.RequestCommandUDP
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2015-09-20 16:22:29 +00:00
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}
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2017-05-17 19:13:01 +00:00
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//if target.Address.Family().IsDomain() && target.Address.Domain() == "v1.mux.com" {
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// command = protocol.RequestCommandMux
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//}
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request := &protocol.RequestHeader{
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Version: encoding.Version,
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User: rec.PickUser(),
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Command: command,
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Address: target.Address,
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Port: target.Port,
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Option: protocol.RequestOptionChunkStream,
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2016-02-01 11:22:29 +00:00
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}
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2015-10-07 12:50:17 +00:00
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2016-12-07 20:43:41 +00:00
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rawAccount, err := request.User.GetTypedAccount()
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if err != nil {
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return newError("failed to get user account").Base(err).AtWarning()
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}
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account := rawAccount.(*vmess.InternalAccount)
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request.Security = account.Security
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2017-02-14 13:16:43 +00:00
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if request.Security.Is(protocol.SecurityType_AES128_GCM) || request.Security.Is(protocol.SecurityType_NONE) || request.Security.Is(protocol.SecurityType_CHACHA20_POLY1305) {
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request.Option.Set(protocol.RequestOptionChunkMasking)
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}
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2017-01-04 11:34:01 +00:00
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input := outboundRay.OutboundInput()
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output := outboundRay.OutboundOutput()
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2016-01-05 11:08:16 +00:00
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2016-07-23 11:17:51 +00:00
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session := encoding.NewClientSession(protocol.DefaultIDHash)
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2017-11-14 23:36:14 +00:00
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ctx, cancel := context.WithCancel(ctx)
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timer := signal.CancelAfterInactivity(ctx, cancel, time.Minute*5)
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2017-01-31 11:42:05 +00:00
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2016-12-29 23:32:20 +00:00
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requestDone := signal.ExecuteAsync(func() error {
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2017-11-09 21:33:15 +00:00
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writer := buf.NewBufferedWriter(buf.NewWriter(conn))
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2017-10-22 18:17:06 +00:00
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if err := session.EncodeRequestHeader(request, writer); err != nil {
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return newError("failed to encode request").Base(err).AtWarning()
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}
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2015-09-15 22:06:22 +00:00
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2016-12-29 23:32:20 +00:00
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bodyWriter := session.EncodeRequestBody(request, writer)
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firstPayload, err := input.ReadTimeout(time.Millisecond * 500)
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2017-03-27 09:14:55 +00:00
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if err != nil && err != buf.ErrReadTimeout {
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2017-04-08 23:43:25 +00:00
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return newError("failed to get first payload").Base(err)
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}
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if !firstPayload.IsEmpty() {
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2017-11-09 21:33:15 +00:00
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if err := bodyWriter.WriteMultiBuffer(firstPayload); err != nil {
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2017-04-08 23:43:25 +00:00
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return newError("failed to write first payload").Base(err)
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2016-12-29 23:32:20 +00:00
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}
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2017-01-04 11:34:01 +00:00
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firstPayload.Release()
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}
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2017-03-27 09:26:44 +00:00
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if err := writer.SetBuffered(false); err != nil {
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return err
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}
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2017-04-27 20:30:48 +00:00
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if err := buf.Copy(input, bodyWriter, buf.UpdateActivity(timer)); err != nil {
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2016-12-29 23:32:20 +00:00
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return err
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2016-08-15 10:23:35 +00:00
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}
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2016-05-13 00:20:07 +00:00
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2016-12-29 23:32:20 +00:00
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if request.Option.Has(protocol.RequestOptionChunkStream) {
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2017-11-09 21:33:15 +00:00
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if err := bodyWriter.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
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2016-12-29 23:32:20 +00:00
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return err
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}
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}
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return nil
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})
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responseDone := signal.ExecuteAsync(func() error {
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defer output.Close()
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2017-11-09 21:33:15 +00:00
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reader := buf.NewBufferedReader(buf.NewReader(conn))
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2016-12-29 23:32:20 +00:00
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header, err := session.DecodeResponseHeader(reader)
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2016-06-02 19:34:25 +00:00
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if err != nil {
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2016-12-29 23:32:20 +00:00
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return err
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2016-06-02 19:34:25 +00:00
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}
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2016-12-29 23:32:20 +00:00
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v.handleCommand(rec.Destination(), header.Command)
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2015-09-10 22:24:18 +00:00
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2016-12-29 23:32:20 +00:00
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reader.SetBuffered(false)
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bodyReader := session.DecodeResponseBody(request, reader)
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2017-04-27 20:30:48 +00:00
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if err := buf.Copy(bodyReader, output, buf.UpdateActivity(timer)); err != nil {
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2016-12-29 23:32:20 +00:00
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return err
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}
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2016-06-02 19:34:25 +00:00
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2016-12-29 23:32:20 +00:00
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return nil
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})
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2015-10-03 09:34:01 +00:00
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2017-01-28 20:24:46 +00:00
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if err := signal.ErrorOrFinish2(ctx, requestDone, responseDone); err != nil {
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2017-04-08 23:43:25 +00:00
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return newError("connection ends").Base(err)
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2016-06-01 20:09:34 +00:00
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}
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2017-01-26 19:46:44 +00:00
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return nil
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2015-09-10 22:24:18 +00:00
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}
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2016-06-14 20:54:08 +00:00
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func init() {
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2017-01-12 23:56:21 +00:00
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common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
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return New(ctx, config.(*Config))
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}))
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2015-09-10 22:24:18 +00:00
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}
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