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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| // Copyright 2017 fatedier, [email protected] | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package client | ||
|
|
||
| import ( | ||
| "io" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/fatedier/frp/models/config" | ||
| "github.com/fatedier/frp/models/msg" | ||
| frpIo "github.com/fatedier/frp/utils/io" | ||
| "github.com/fatedier/frp/utils/log" | ||
| frpNet "github.com/fatedier/frp/utils/net" | ||
| "github.com/fatedier/frp/utils/util" | ||
| ) | ||
|
|
||
| // Vistor is used for forward traffics from local port tot remote service. | ||
| type Vistor interface { | ||
| Run() error | ||
| Close() | ||
| log.Logger | ||
| } | ||
|
|
||
| func NewVistor(ctl *Control, pxyConf config.ProxyConf) (vistor Vistor) { | ||
| baseVistor := BaseVistor{ | ||
| ctl: ctl, | ||
| Logger: log.NewPrefixLogger(pxyConf.GetName()), | ||
| } | ||
| switch cfg := pxyConf.(type) { | ||
| case *config.StcpProxyConf: | ||
| vistor = &StcpVistor{ | ||
| BaseVistor: baseVistor, | ||
| cfg: cfg, | ||
| } | ||
| } | ||
| return | ||
| } | ||
|
|
||
| type BaseVistor struct { | ||
| ctl *Control | ||
| l frpNet.Listener | ||
| closed bool | ||
| mu sync.RWMutex | ||
| log.Logger | ||
| } | ||
|
|
||
| type StcpVistor struct { | ||
| BaseVistor | ||
|
|
||
| cfg *config.StcpProxyConf | ||
| } | ||
|
|
||
| func (sv *StcpVistor) Run() (err error) { | ||
| sv.l, err = frpNet.ListenTcp(sv.cfg.BindAddr, int64(sv.cfg.BindPort)) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
|
||
| go sv.worker() | ||
| return | ||
| } | ||
|
|
||
| func (sv *StcpVistor) Close() { | ||
| sv.l.Close() | ||
| } | ||
|
|
||
| func (sv *StcpVistor) worker() { | ||
| for { | ||
| conn, err := sv.l.Accept() | ||
| if err != nil { | ||
| sv.Warn("stcp local listener closed") | ||
| return | ||
| } | ||
|
|
||
| go sv.handleConn(conn) | ||
| } | ||
| } | ||
|
|
||
| func (sv *StcpVistor) handleConn(userConn frpNet.Conn) { | ||
| defer userConn.Close() | ||
|
|
||
| sv.Debug("get a new stcp user connection") | ||
| vistorConn, err := sv.ctl.connectServer() | ||
| if err != nil { | ||
| return | ||
| } | ||
| defer vistorConn.Close() | ||
|
|
||
| now := time.Now().Unix() | ||
| newVistorConnMsg := &msg.NewVistorConn{ | ||
| ProxyName: sv.cfg.ServerName, | ||
| SignKey: util.GetAuthKey(sv.cfg.Sk, now), | ||
| Timestamp: now, | ||
| UseEncryption: sv.cfg.UseEncryption, | ||
| UseCompression: sv.cfg.UseCompression, | ||
| } | ||
| err = msg.WriteMsg(vistorConn, newVistorConnMsg) | ||
| if err != nil { | ||
| sv.Warn("send newVistorConnMsg to server error: %v", err) | ||
| return | ||
| } | ||
|
|
||
| var newVistorConnRespMsg msg.NewVistorConnResp | ||
| vistorConn.SetReadDeadline(time.Now().Add(10 * time.Second)) | ||
| err = msg.ReadMsgInto(vistorConn, &newVistorConnRespMsg) | ||
| if err != nil { | ||
| sv.Warn("get newVistorConnRespMsg error: %v", err) | ||
| return | ||
| } | ||
| vistorConn.SetReadDeadline(time.Time{}) | ||
|
|
||
| if newVistorConnRespMsg.Error != "" { | ||
| sv.Warn("start new vistor connection error: %s", newVistorConnRespMsg.Error) | ||
| return | ||
| } | ||
|
|
||
| var remote io.ReadWriteCloser | ||
| remote = vistorConn | ||
| if sv.cfg.UseEncryption { | ||
| remote, err = frpIo.WithEncryption(remote, []byte(sv.cfg.Sk)) | ||
| if err != nil { | ||
| sv.Error("create encryption stream error: %v", err) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| if sv.cfg.UseCompression { | ||
| remote = frpIo.WithCompression(remote) | ||
| } | ||
|
|
||
| frpIo.Join(userConn, remote) | ||
| } |
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