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"
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"net"
"strings"
"golang.org/x/time/rate"
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"github.com/fatedier/frp/pkg/config"
"github.com/fatedier/frp/pkg/consts"
"github.com/fatedier/frp/pkg/util/util"
"github.com/fatedier/frp/pkg/util/vhost"
)
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type TCPMuxProxy struct {
*BaseProxy
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cfg *config.TCPMuxProxyConf
}
func (pxy *TCPMuxProxy) httpConnectListen(domain, routeByHTTPUser string, addrs []string) ([]string, error) {
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var l net.Listener
var err error
routeConfig := &vhost.RouteConfig{
Domain: domain,
RouteByHTTPUser: routeByHTTPUser,
}
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if pxy.cfg.Group != "" {
l, err = pxy.rc.TCPMuxGroupCtl.Listen(pxy.ctx, pxy.cfg.Multiplexer, pxy.cfg.Group, pxy.cfg.GroupKey, *routeConfig)
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} else {
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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], group [%s] routeByHTTPUser [%s]",
domain, pxy.cfg.Group, pxy.cfg.RouteByHTTPUser)
pxy.listeners = append(pxy.listeners, l)
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return append(addrs, util.CanonicalAddr(domain, pxy.serverCfg.TCPMuxHTTPConnectPort)), nil
}
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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, pxy.cfg.RouteByHTTPUser, addrs)
if err != nil {
return "", err
}
}
if pxy.cfg.SubDomain != "" {
addrs, err = pxy.httpConnectListen(pxy.cfg.SubDomain+"."+pxy.serverCfg.SubDomainHost, pxy.cfg.RouteByHTTPUser, addrs)
if err != nil {
return "", err
}
}
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pxy.startListenHandler(pxy, HandleUserTCPConnection)
remoteAddr = strings.Join(addrs, ",")
return remoteAddr, err
}
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func (pxy *TCPMuxProxy) Run() (remoteAddr string, err error) {
switch pxy.cfg.Multiplexer {
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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
}
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func (pxy *TCPMuxProxy) GetConf() config.ProxyConf {
return pxy.cfg
}
func (pxy *TCPMuxProxy) GetLimiter() *rate.Limiter {
return pxy.limiter
}
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func (pxy *TCPMuxProxy) Close() {
pxy.BaseProxy.Close()
}