mirror of
https://github.com/fatedier/frp.git
synced 2024-11-27 12:39:09 +08:00
136 lines
3.2 KiB
Go
136 lines
3.2 KiB
Go
// Copyright 2017 fatedier, fatedier@gmail.com
|
|
//
|
|
// 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 visitor
|
|
|
|
import (
|
|
"io"
|
|
"net"
|
|
"strconv"
|
|
"time"
|
|
|
|
libio "github.com/fatedier/golib/io"
|
|
|
|
v1 "github.com/fatedier/frp/pkg/config/v1"
|
|
"github.com/fatedier/frp/pkg/msg"
|
|
"github.com/fatedier/frp/pkg/util/util"
|
|
"github.com/fatedier/frp/pkg/util/xlog"
|
|
)
|
|
|
|
type STCPVisitor struct {
|
|
*BaseVisitor
|
|
|
|
cfg *v1.STCPVisitorConfig
|
|
}
|
|
|
|
func (sv *STCPVisitor) Run() (err error) {
|
|
if sv.cfg.BindPort > 0 {
|
|
sv.l, err = net.Listen("tcp", net.JoinHostPort(sv.cfg.BindAddr, strconv.Itoa(sv.cfg.BindPort)))
|
|
if err != nil {
|
|
return
|
|
}
|
|
go sv.worker()
|
|
}
|
|
|
|
go sv.internalConnWorker()
|
|
return
|
|
}
|
|
|
|
func (sv *STCPVisitor) Close() {
|
|
sv.BaseVisitor.Close()
|
|
}
|
|
|
|
func (sv *STCPVisitor) worker() {
|
|
xl := xlog.FromContextSafe(sv.ctx)
|
|
for {
|
|
conn, err := sv.l.Accept()
|
|
if err != nil {
|
|
xl.Warnf("stcp local listener closed")
|
|
return
|
|
}
|
|
go sv.handleConn(conn)
|
|
}
|
|
}
|
|
|
|
func (sv *STCPVisitor) internalConnWorker() {
|
|
xl := xlog.FromContextSafe(sv.ctx)
|
|
for {
|
|
conn, err := sv.internalLn.Accept()
|
|
if err != nil {
|
|
xl.Warnf("stcp internal listener closed")
|
|
return
|
|
}
|
|
go sv.handleConn(conn)
|
|
}
|
|
}
|
|
|
|
func (sv *STCPVisitor) handleConn(userConn net.Conn) {
|
|
xl := xlog.FromContextSafe(sv.ctx)
|
|
defer userConn.Close()
|
|
|
|
xl.Debugf("get a new stcp user connection")
|
|
visitorConn, err := sv.helper.ConnectServer()
|
|
if err != nil {
|
|
return
|
|
}
|
|
defer visitorConn.Close()
|
|
|
|
now := time.Now().Unix()
|
|
newVisitorConnMsg := &msg.NewVisitorConn{
|
|
RunID: sv.helper.RunID(),
|
|
ProxyName: sv.cfg.ServerName,
|
|
SignKey: util.GetAuthKey(sv.cfg.SecretKey, now),
|
|
Timestamp: now,
|
|
UseEncryption: sv.cfg.Transport.UseEncryption,
|
|
UseCompression: sv.cfg.Transport.UseCompression,
|
|
}
|
|
err = msg.WriteMsg(visitorConn, newVisitorConnMsg)
|
|
if err != nil {
|
|
xl.Warnf("send newVisitorConnMsg to server error: %v", err)
|
|
return
|
|
}
|
|
|
|
var newVisitorConnRespMsg msg.NewVisitorConnResp
|
|
_ = visitorConn.SetReadDeadline(time.Now().Add(10 * time.Second))
|
|
err = msg.ReadMsgInto(visitorConn, &newVisitorConnRespMsg)
|
|
if err != nil {
|
|
xl.Warnf("get newVisitorConnRespMsg error: %v", err)
|
|
return
|
|
}
|
|
_ = visitorConn.SetReadDeadline(time.Time{})
|
|
|
|
if newVisitorConnRespMsg.Error != "" {
|
|
xl.Warnf("start new visitor connection error: %s", newVisitorConnRespMsg.Error)
|
|
return
|
|
}
|
|
|
|
var remote io.ReadWriteCloser
|
|
remote = visitorConn
|
|
if sv.cfg.Transport.UseEncryption {
|
|
remote, err = libio.WithEncryption(remote, []byte(sv.cfg.SecretKey))
|
|
if err != nil {
|
|
xl.Errorf("create encryption stream error: %v", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
if sv.cfg.Transport.UseCompression {
|
|
var recycleFn func()
|
|
remote, recycleFn = libio.WithCompressionFromPool(remote)
|
|
defer recycleFn()
|
|
}
|
|
|
|
libio.Join(userConn, remote)
|
|
}
|