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