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96 lines
2.2 KiB
96 lines
2.2 KiB
// Copyright 2019 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 proxy
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import (
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"fmt"
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"github.com/fatedier/frp/models/config"
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"github.com/fatedier/frp/models/msg"
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"github.com/fatedier/golib/errors"
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)
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type XtcpProxy struct {
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*BaseProxy
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cfg *config.XtcpProxyConf
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closeCh chan struct{}
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}
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func (pxy *XtcpProxy) Run() (remoteAddr string, err error) {
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if pxy.rc.NatHoleController == nil {
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pxy.Error("udp port for xtcp is not specified.")
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err = fmt.Errorf("xtcp is not supported in frps")
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return
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}
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sidCh := pxy.rc.NatHoleController.ListenClient(pxy.GetName(), pxy.cfg.Sk)
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go func() {
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for {
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select {
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case <-pxy.closeCh:
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break
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case sidRequest := <-sidCh:
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sr := sidRequest
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workConn, errRet := pxy.GetWorkConnFromPool()
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if errRet != nil {
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continue
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}
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m := &msg.NatHoleSid{
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Sid: sr.Sid,
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}
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errRet = msg.WriteMsg(workConn, m)
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if errRet != nil {
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pxy.Warn("write nat hole sid package error, %v", errRet)
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workConn.Close()
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break
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}
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go func() {
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raw, errRet := msg.ReadMsg(workConn)
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if errRet != nil {
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pxy.Warn("read nat hole client ok package error: %v", errRet)
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workConn.Close()
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return
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}
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if _, ok := raw.(*msg.NatHoleClientDetectOK); !ok {
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pxy.Warn("read nat hole client ok package format error")
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workConn.Close()
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return
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}
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select {
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case sr.NotifyCh <- struct{}{}:
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default:
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}
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}()
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}
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}
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}()
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return
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}
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func (pxy *XtcpProxy) GetConf() config.ProxyConf {
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return pxy.cfg
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}
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func (pxy *XtcpProxy) Close() {
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pxy.BaseProxy.Close()
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pxy.rc.NatHoleController.CloseClient(pxy.GetName())
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errors.PanicToError(func() {
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close(pxy.closeCh)
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})
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}
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