frp/server/proxy/tcp.go

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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"
"github.com/fatedier/frp/g"
"github.com/fatedier/frp/models/config"
frpNet "github.com/fatedier/frp/utils/net"
)
type TcpProxy struct {
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*BaseProxy
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cfg *config.TcpProxyConf
realPort int
}
func (pxy *TcpProxy) Run() (remoteAddr string, err error) {
if pxy.cfg.Group != "" {
l, realPort, errRet := pxy.rc.TcpGroupCtl.Listen(pxy.name, pxy.cfg.Group, pxy.cfg.GroupKey, g.GlbServerCfg.ProxyBindAddr, pxy.cfg.RemotePort)
if errRet != nil {
err = errRet
return
}
defer func() {
if err != nil {
l.Close()
}
}()
pxy.realPort = realPort
listener := frpNet.WrapLogListener(l)
listener.AddLogPrefix(pxy.name)
pxy.listeners = append(pxy.listeners, listener)
pxy.Info("tcp proxy listen port [%d] in group [%s]", pxy.cfg.RemotePort, pxy.cfg.Group)
} else {
pxy.realPort, err = pxy.rc.TcpPortManager.Acquire(pxy.name, pxy.cfg.RemotePort)
if err != nil {
return
}
defer func() {
if err != nil {
pxy.rc.TcpPortManager.Release(pxy.realPort)
}
}()
listener, errRet := frpNet.ListenTcp(g.GlbServerCfg.ProxyBindAddr, pxy.realPort)
if errRet != nil {
err = errRet
return
}
listener.AddLogPrefix(pxy.name)
pxy.listeners = append(pxy.listeners, listener)
pxy.Info("tcp proxy listen port [%d]", pxy.cfg.RemotePort)
}
pxy.cfg.RemotePort = pxy.realPort
remoteAddr = fmt.Sprintf(":%d", pxy.realPort)
pxy.startListenHandler(pxy, HandleUserTcpConnection)
return
}
func (pxy *TcpProxy) GetConf() config.ProxyConf {
return pxy.cfg
}
func (pxy *TcpProxy) Close() {
pxy.BaseProxy.Close()
if pxy.cfg.Group == "" {
pxy.rc.TcpPortManager.Release(pxy.realPort)
}
}