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- // Copyright 2019 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 proxy
- import (
- "fmt"
- "reflect"
- "sync"
- v1 "github.com/fatedier/frp/pkg/config/v1"
- "github.com/fatedier/frp/pkg/msg"
- )
- func init() {
- RegisterProxyFactory(reflect.TypeOf(&v1.XTCPProxyConfig{}), NewXTCPProxy)
- }
- type XTCPProxy struct {
- *BaseProxy
- cfg *v1.XTCPProxyConfig
- closeCh chan struct{}
- closeOnce sync.Once
- }
- func NewXTCPProxy(baseProxy *BaseProxy) Proxy {
- unwrapped, ok := baseProxy.GetConfigurer().(*v1.XTCPProxyConfig)
- if !ok {
- return nil
- }
- return &XTCPProxy{
- BaseProxy: baseProxy,
- cfg: unwrapped,
- closeCh: make(chan struct{}),
- }
- }
- func (pxy *XTCPProxy) Run() (remoteAddr string, err error) {
- xl := pxy.xl
- if pxy.rc.NatHoleController == nil {
- err = fmt.Errorf("xtcp is not supported in frps")
- return
- }
- allowUsers := pxy.cfg.AllowUsers
- // if allowUsers is empty, only allow same user from proxy
- if len(allowUsers) == 0 {
- allowUsers = []string{pxy.GetUserInfo().User}
- }
- sidCh, err := pxy.rc.NatHoleController.ListenClient(pxy.GetName(), pxy.cfg.Secretkey, allowUsers)
- if err != nil {
- return "", err
- }
- go func() {
- for {
- select {
- case <-pxy.closeCh:
- return
- case sid := <-sidCh:
- workConn, errRet := pxy.GetWorkConnFromPool(nil, nil)
- if errRet != nil {
- continue
- }
- m := &msg.NatHoleSid{
- Sid: sid,
- }
- errRet = msg.WriteMsg(workConn, m)
- if errRet != nil {
- xl.Warnf("write nat hole sid package error, %v", errRet)
- }
- workConn.Close()
- }
- }
- }()
- return
- }
- func (pxy *XTCPProxy) Close() {
- pxy.closeOnce.Do(func() {
- pxy.BaseProxy.Close()
- pxy.rc.NatHoleController.CloseClient(pxy.GetName())
- close(pxy.closeCh)
- })
- }
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