mirror of https://gitee.com/IrisVega/frp.git
136 lines
3.2 KiB
Go
136 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 visitor
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import (
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"io"
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"net"
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"strconv"
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"time"
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libio "github.com/fatedier/golib/io"
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"github.com/fatedier/frp/pkg/config"
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"github.com/fatedier/frp/pkg/msg"
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"github.com/fatedier/frp/pkg/util/util"
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"github.com/fatedier/frp/pkg/util/xlog"
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)
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type STCPVisitor struct {
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*BaseVisitor
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cfg *config.STCPVisitorConf
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}
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func (sv *STCPVisitor) Run() (err error) {
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if sv.cfg.BindPort > 0 {
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sv.l, err = net.Listen("tcp", net.JoinHostPort(sv.cfg.BindAddr, strconv.Itoa(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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}
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go sv.internalConnWorker()
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return
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}
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func (sv *STCPVisitor) Close() {
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sv.BaseVisitor.Close()
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}
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func (sv *STCPVisitor) worker() {
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xl := xlog.FromContextSafe(sv.ctx)
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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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xl.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 *STCPVisitor) internalConnWorker() {
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xl := xlog.FromContextSafe(sv.ctx)
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for {
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conn, err := sv.internalLn.Accept()
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if err != nil {
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xl.Warn("stcp internal 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 *STCPVisitor) handleConn(userConn net.Conn) {
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xl := xlog.FromContextSafe(sv.ctx)
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defer userConn.Close()
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xl.Debug("get a new stcp user connection")
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visitorConn, err := sv.helper.ConnectServer()
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if err != nil {
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return
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}
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defer visitorConn.Close()
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now := time.Now().Unix()
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newVisitorConnMsg := &msg.NewVisitorConn{
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RunID: sv.helper.RunID(),
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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(visitorConn, newVisitorConnMsg)
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if err != nil {
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xl.Warn("send newVisitorConnMsg to server error: %v", err)
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return
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}
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var newVisitorConnRespMsg msg.NewVisitorConnResp
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_ = visitorConn.SetReadDeadline(time.Now().Add(10 * time.Second))
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err = msg.ReadMsgInto(visitorConn, &newVisitorConnRespMsg)
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if err != nil {
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xl.Warn("get newVisitorConnRespMsg error: %v", err)
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return
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}
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_ = visitorConn.SetReadDeadline(time.Time{})
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if newVisitorConnRespMsg.Error != "" {
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xl.Warn("start new visitor connection error: %s", newVisitorConnRespMsg.Error)
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return
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}
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var remote io.ReadWriteCloser
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remote = visitorConn
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if sv.cfg.UseEncryption {
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remote, err = libio.WithEncryption(remote, []byte(sv.cfg.Sk))
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if err != nil {
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xl.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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var releaseFn func()
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remote, releaseFn = libio.WithCompressionFromPool(remote)
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defer releaseFn()
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}
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libio.Join(userConn, remote)
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}
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