mirror of
https://gitee.com/IrisVega/frp.git
synced 2024-11-01 22:31:29 +08:00
369 lines
8.9 KiB
Go
369 lines
8.9 KiB
Go
// Copyright 2017 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 (
|
|
"bytes"
|
|
"context"
|
|
"io"
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
frpIo "github.com/fatedier/golib/io"
|
|
libdial "github.com/fatedier/golib/net/dial"
|
|
pp "github.com/pires/go-proxyproto"
|
|
"golang.org/x/time/rate"
|
|
|
|
"github.com/fatedier/frp/pkg/config"
|
|
"github.com/fatedier/frp/pkg/msg"
|
|
plugin "github.com/fatedier/frp/pkg/plugin/client"
|
|
"github.com/fatedier/frp/pkg/transport"
|
|
"github.com/fatedier/frp/pkg/util/limit"
|
|
"github.com/fatedier/frp/pkg/util/xlog"
|
|
)
|
|
|
|
// Proxy defines how to handle work connections for different proxy type.
|
|
type Proxy interface {
|
|
Run() error
|
|
|
|
// InWorkConn accept work connections registered to server.
|
|
InWorkConn(net.Conn, *msg.StartWorkConn)
|
|
|
|
Close()
|
|
}
|
|
|
|
func NewProxy(
|
|
ctx context.Context,
|
|
pxyConf config.ProxyConf,
|
|
clientCfg config.ClientCommonConf,
|
|
msgTransporter transport.MessageTransporter,
|
|
) (pxy Proxy) {
|
|
var limiter *rate.Limiter
|
|
limitBytes := pxyConf.GetBaseInfo().BandwidthLimit.Bytes()
|
|
if limitBytes > 0 && pxyConf.GetBaseInfo().BandwidthLimitMode == config.BandwidthLimitModeClient {
|
|
limiter = rate.NewLimiter(rate.Limit(float64(limitBytes)), int(limitBytes))
|
|
}
|
|
|
|
baseProxy := BaseProxy{
|
|
clientCfg: clientCfg,
|
|
limiter: limiter,
|
|
msgTransporter: msgTransporter,
|
|
xl: xlog.FromContextSafe(ctx),
|
|
ctx: ctx,
|
|
}
|
|
switch cfg := pxyConf.(type) {
|
|
case *config.TCPProxyConf:
|
|
pxy = &TCPProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
}
|
|
case *config.TCPMuxProxyConf:
|
|
pxy = &TCPMuxProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
}
|
|
case *config.UDPProxyConf:
|
|
pxy = &UDPProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
}
|
|
case *config.HTTPProxyConf:
|
|
pxy = &HTTPProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
}
|
|
case *config.HTTPSProxyConf:
|
|
pxy = &HTTPSProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
}
|
|
case *config.STCPProxyConf:
|
|
pxy = &STCPProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
}
|
|
case *config.XTCPProxyConf:
|
|
pxy = &XTCPProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
}
|
|
case *config.SUDPProxyConf:
|
|
pxy = &SUDPProxy{
|
|
BaseProxy: &baseProxy,
|
|
cfg: cfg,
|
|
closeCh: make(chan struct{}),
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
type BaseProxy struct {
|
|
closed bool
|
|
clientCfg config.ClientCommonConf
|
|
msgTransporter transport.MessageTransporter
|
|
limiter *rate.Limiter
|
|
|
|
mu sync.RWMutex
|
|
xl *xlog.Logger
|
|
ctx context.Context
|
|
}
|
|
|
|
// TCP
|
|
type TCPProxy struct {
|
|
*BaseProxy
|
|
|
|
cfg *config.TCPProxyConf
|
|
proxyPlugin plugin.Plugin
|
|
}
|
|
|
|
func (pxy *TCPProxy) Run() (err error) {
|
|
if pxy.cfg.Plugin != "" {
|
|
pxy.proxyPlugin, err = plugin.Create(pxy.cfg.Plugin, pxy.cfg.PluginParams)
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (pxy *TCPProxy) Close() {
|
|
if pxy.proxyPlugin != nil {
|
|
pxy.proxyPlugin.Close()
|
|
}
|
|
}
|
|
|
|
func (pxy *TCPProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
|
|
HandleTCPWorkConnection(pxy.ctx, &pxy.cfg.LocalSvrConf, pxy.proxyPlugin, pxy.cfg.GetBaseInfo(), pxy.limiter,
|
|
conn, []byte(pxy.clientCfg.Token), m)
|
|
}
|
|
|
|
// TCP Multiplexer
|
|
type TCPMuxProxy struct {
|
|
*BaseProxy
|
|
|
|
cfg *config.TCPMuxProxyConf
|
|
proxyPlugin plugin.Plugin
|
|
}
|
|
|
|
func (pxy *TCPMuxProxy) Run() (err error) {
|
|
if pxy.cfg.Plugin != "" {
|
|
pxy.proxyPlugin, err = plugin.Create(pxy.cfg.Plugin, pxy.cfg.PluginParams)
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (pxy *TCPMuxProxy) Close() {
|
|
if pxy.proxyPlugin != nil {
|
|
pxy.proxyPlugin.Close()
|
|
}
|
|
}
|
|
|
|
func (pxy *TCPMuxProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
|
|
HandleTCPWorkConnection(pxy.ctx, &pxy.cfg.LocalSvrConf, pxy.proxyPlugin, pxy.cfg.GetBaseInfo(), pxy.limiter,
|
|
conn, []byte(pxy.clientCfg.Token), m)
|
|
}
|
|
|
|
// HTTP
|
|
type HTTPProxy struct {
|
|
*BaseProxy
|
|
|
|
cfg *config.HTTPProxyConf
|
|
proxyPlugin plugin.Plugin
|
|
}
|
|
|
|
func (pxy *HTTPProxy) Run() (err error) {
|
|
if pxy.cfg.Plugin != "" {
|
|
pxy.proxyPlugin, err = plugin.Create(pxy.cfg.Plugin, pxy.cfg.PluginParams)
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (pxy *HTTPProxy) Close() {
|
|
if pxy.proxyPlugin != nil {
|
|
pxy.proxyPlugin.Close()
|
|
}
|
|
}
|
|
|
|
func (pxy *HTTPProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
|
|
HandleTCPWorkConnection(pxy.ctx, &pxy.cfg.LocalSvrConf, pxy.proxyPlugin, pxy.cfg.GetBaseInfo(), pxy.limiter,
|
|
conn, []byte(pxy.clientCfg.Token), m)
|
|
}
|
|
|
|
// HTTPS
|
|
type HTTPSProxy struct {
|
|
*BaseProxy
|
|
|
|
cfg *config.HTTPSProxyConf
|
|
proxyPlugin plugin.Plugin
|
|
}
|
|
|
|
func (pxy *HTTPSProxy) Run() (err error) {
|
|
if pxy.cfg.Plugin != "" {
|
|
pxy.proxyPlugin, err = plugin.Create(pxy.cfg.Plugin, pxy.cfg.PluginParams)
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (pxy *HTTPSProxy) Close() {
|
|
if pxy.proxyPlugin != nil {
|
|
pxy.proxyPlugin.Close()
|
|
}
|
|
}
|
|
|
|
func (pxy *HTTPSProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
|
|
HandleTCPWorkConnection(pxy.ctx, &pxy.cfg.LocalSvrConf, pxy.proxyPlugin, pxy.cfg.GetBaseInfo(), pxy.limiter,
|
|
conn, []byte(pxy.clientCfg.Token), m)
|
|
}
|
|
|
|
// STCP
|
|
type STCPProxy struct {
|
|
*BaseProxy
|
|
|
|
cfg *config.STCPProxyConf
|
|
proxyPlugin plugin.Plugin
|
|
}
|
|
|
|
func (pxy *STCPProxy) Run() (err error) {
|
|
if pxy.cfg.Plugin != "" {
|
|
pxy.proxyPlugin, err = plugin.Create(pxy.cfg.Plugin, pxy.cfg.PluginParams)
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (pxy *STCPProxy) Close() {
|
|
if pxy.proxyPlugin != nil {
|
|
pxy.proxyPlugin.Close()
|
|
}
|
|
}
|
|
|
|
func (pxy *STCPProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
|
|
HandleTCPWorkConnection(pxy.ctx, &pxy.cfg.LocalSvrConf, pxy.proxyPlugin, pxy.cfg.GetBaseInfo(), pxy.limiter,
|
|
conn, []byte(pxy.clientCfg.Token), m)
|
|
}
|
|
|
|
// Common handler for tcp work connections.
|
|
func HandleTCPWorkConnection(ctx context.Context, localInfo *config.LocalSvrConf, proxyPlugin plugin.Plugin,
|
|
baseInfo *config.BaseProxyConf, limiter *rate.Limiter, workConn net.Conn, encKey []byte, m *msg.StartWorkConn,
|
|
) {
|
|
xl := xlog.FromContextSafe(ctx)
|
|
var (
|
|
remote io.ReadWriteCloser
|
|
err error
|
|
)
|
|
remote = workConn
|
|
if limiter != nil {
|
|
remote = frpIo.WrapReadWriteCloser(limit.NewReader(workConn, limiter), limit.NewWriter(workConn, limiter), func() error {
|
|
return workConn.Close()
|
|
})
|
|
}
|
|
|
|
xl.Trace("handle tcp work connection, use_encryption: %t, use_compression: %t",
|
|
baseInfo.UseEncryption, baseInfo.UseCompression)
|
|
if baseInfo.UseEncryption {
|
|
remote, err = frpIo.WithEncryption(remote, encKey)
|
|
if err != nil {
|
|
workConn.Close()
|
|
xl.Error("create encryption stream error: %v", err)
|
|
return
|
|
}
|
|
}
|
|
if baseInfo.UseCompression {
|
|
remote = frpIo.WithCompression(remote)
|
|
}
|
|
|
|
// check if we need to send proxy protocol info
|
|
var extraInfo []byte
|
|
if baseInfo.ProxyProtocolVersion != "" {
|
|
if m.SrcAddr != "" && m.SrcPort != 0 {
|
|
if m.DstAddr == "" {
|
|
m.DstAddr = "127.0.0.1"
|
|
}
|
|
srcAddr, _ := net.ResolveTCPAddr("tcp", net.JoinHostPort(m.SrcAddr, strconv.Itoa(int(m.SrcPort))))
|
|
dstAddr, _ := net.ResolveTCPAddr("tcp", net.JoinHostPort(m.DstAddr, strconv.Itoa(int(m.DstPort))))
|
|
h := &pp.Header{
|
|
Command: pp.PROXY,
|
|
SourceAddr: srcAddr,
|
|
DestinationAddr: dstAddr,
|
|
}
|
|
|
|
if strings.Contains(m.SrcAddr, ".") {
|
|
h.TransportProtocol = pp.TCPv4
|
|
} else {
|
|
h.TransportProtocol = pp.TCPv6
|
|
}
|
|
|
|
if baseInfo.ProxyProtocolVersion == "v1" {
|
|
h.Version = 1
|
|
} else if baseInfo.ProxyProtocolVersion == "v2" {
|
|
h.Version = 2
|
|
}
|
|
|
|
buf := bytes.NewBuffer(nil)
|
|
_, _ = h.WriteTo(buf)
|
|
extraInfo = buf.Bytes()
|
|
}
|
|
}
|
|
|
|
if proxyPlugin != nil {
|
|
// if plugin is set, let plugin handle connections first
|
|
xl.Debug("handle by plugin: %s", proxyPlugin.Name())
|
|
proxyPlugin.Handle(remote, workConn, extraInfo)
|
|
xl.Debug("handle by plugin finished")
|
|
return
|
|
}
|
|
|
|
localConn, err := libdial.Dial(
|
|
net.JoinHostPort(localInfo.LocalIP, strconv.Itoa(localInfo.LocalPort)),
|
|
libdial.WithTimeout(10*time.Second),
|
|
)
|
|
if err != nil {
|
|
workConn.Close()
|
|
xl.Error("connect to local service [%s:%d] error: %v", localInfo.LocalIP, localInfo.LocalPort, err)
|
|
return
|
|
}
|
|
|
|
xl.Debug("join connections, localConn(l[%s] r[%s]) workConn(l[%s] r[%s])", localConn.LocalAddr().String(),
|
|
localConn.RemoteAddr().String(), workConn.LocalAddr().String(), workConn.RemoteAddr().String())
|
|
|
|
if len(extraInfo) > 0 {
|
|
if _, err := localConn.Write(extraInfo); err != nil {
|
|
workConn.Close()
|
|
xl.Error("write extraInfo to local conn error: %v", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
_, _, errs := frpIo.Join(localConn, remote)
|
|
xl.Debug("join connections closed")
|
|
if len(errs) > 0 {
|
|
xl.Trace("join connections errors: %v", errs)
|
|
}
|
|
}
|