frp/server/proxy/tcpmux.go

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// Copyright 2020 guylewin, guy@lewin.co.il
//
// 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"
"strings"
"github.com/fatedier/frp/models/config"
"github.com/fatedier/frp/models/consts"
"github.com/fatedier/frp/utils/util"
"github.com/fatedier/frp/utils/vhost"
)
type TcpMuxProxy struct {
*BaseProxy
cfg *config.TcpMuxProxyConf
realPort int
}
func (pxy *TcpMuxProxy) httpConnectListen(domain string, addrs []string) ([]string, error) {
routeConfig := &vhost.VhostRouteConfig{
Domain: domain,
}
l, err := pxy.rc.TcpMuxHttpConnectMuxer.Listen(pxy.ctx, routeConfig)
if err != nil {
return nil, err
}
pxy.xl.Info("tcpmux httpconnect multiplexer listens for host [%s]", routeConfig.Domain)
pxy.listeners = append(pxy.listeners, l)
return append(addrs, util.CanonicalAddr(routeConfig.Domain, pxy.serverCfg.TcpMuxHttpConnectPort)), nil
}
func (pxy *TcpMuxProxy) httpConnectRun() (remoteAddr string, err error) {
addrs := make([]string, 0)
for _, domain := range pxy.cfg.CustomDomains {
if domain == "" {
continue
}
addrs, err = pxy.httpConnectListen(domain, addrs)
if err != nil {
return "", err
}
}
if pxy.cfg.SubDomain != "" {
addrs, err = pxy.httpConnectListen(pxy.cfg.SubDomain+"."+pxy.serverCfg.SubDomainHost, addrs)
if err != nil {
return "", err
}
}
pxy.startListenHandler(pxy, HandleUserTcpConnection)
remoteAddr = strings.Join(addrs, ",")
return remoteAddr, err
}
func (pxy *TcpMuxProxy) Run() (remoteAddr string, err error) {
switch pxy.cfg.Multiplexer {
case consts.HttpConnectTcpMultiplexer:
remoteAddr, err = pxy.httpConnectRun()
default:
err = fmt.Errorf("unknown multiplexer [%s]", pxy.cfg.Multiplexer)
}
if err != nil {
pxy.Close()
}
return remoteAddr, err
}
func (pxy *TcpMuxProxy) GetConf() config.ProxyConf {
return pxy.cfg
}
func (pxy *TcpMuxProxy) Close() {
pxy.BaseProxy.Close()
if pxy.cfg.Group == "" {
pxy.rc.TcpPortManager.Release(pxy.realPort)
}
}