mirror of
https://github.com/fatedier/frp.git
synced 2024-11-24 11:09:21 +08:00
666f122a72
The ClientCommonConf, configuration file path, and server UDP port are now passed around as arguments instead of being shared between components as global variables. This allows for multiple clients to exist in the same process, and allows client.Session to be used as a library more easily.
567 lines
14 KiB
Go
567 lines
14 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"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/fatedier/frp/models/config"
|
|
"github.com/fatedier/frp/models/msg"
|
|
"github.com/fatedier/frp/models/plugin"
|
|
"github.com/fatedier/frp/models/proto/udp"
|
|
"github.com/fatedier/frp/utils/log"
|
|
frpNet "github.com/fatedier/frp/utils/net"
|
|
|
|
"github.com/fatedier/golib/errors"
|
|
frpIo "github.com/fatedier/golib/io"
|
|
"github.com/fatedier/golib/pool"
|
|
fmux "github.com/hashicorp/yamux"
|
|
pp "github.com/pires/go-proxyproto"
|
|
)
|
|
|
|
// Proxy defines how to handle work connections for different proxy type.
|
|
type Proxy interface {
|
|
Run() error
|
|
|
|
// InWorkConn accept work connections registered to server.
|
|
InWorkConn(frpNet.Conn, *msg.StartWorkConn)
|
|
|
|
Close()
|
|
log.Logger
|
|
}
|
|
|
|
func NewProxy(pxyConf config.ProxyConf, clientCfg config.ClientCommonConf, serverUDPPort int) (pxy Proxy) {
|
|
baseProxy := BaseProxy{
|
|
Logger: log.NewPrefixLogger(pxyConf.GetBaseInfo().ProxyName),
|
|
clientCfg: clientCfg,
|
|
serverUDPPort: serverUDPPort,
|
|
}
|
|
switch cfg := pxyConf.(type) {
|
|
case *config.TcpProxyConf:
|
|
pxy = &TcpProxy{
|
|
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,
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
type BaseProxy struct {
|
|
closed bool
|
|
mu sync.RWMutex
|
|
clientCfg config.ClientCommonConf
|
|
serverUDPPort int
|
|
log.Logger
|
|
}
|
|
|
|
// 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 frpNet.Conn, m *msg.StartWorkConn) {
|
|
HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, pxy.proxyPlugin, &pxy.cfg.BaseProxyConf, 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 frpNet.Conn, m *msg.StartWorkConn) {
|
|
HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, pxy.proxyPlugin, &pxy.cfg.BaseProxyConf, 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 frpNet.Conn, m *msg.StartWorkConn) {
|
|
HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, pxy.proxyPlugin, &pxy.cfg.BaseProxyConf, 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 frpNet.Conn, m *msg.StartWorkConn) {
|
|
HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, pxy.proxyPlugin, &pxy.cfg.BaseProxyConf, conn,
|
|
[]byte(pxy.clientCfg.Token), m)
|
|
}
|
|
|
|
// XTCP
|
|
type XtcpProxy struct {
|
|
*BaseProxy
|
|
|
|
cfg *config.XtcpProxyConf
|
|
proxyPlugin plugin.Plugin
|
|
}
|
|
|
|
func (pxy *XtcpProxy) 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 *XtcpProxy) Close() {
|
|
if pxy.proxyPlugin != nil {
|
|
pxy.proxyPlugin.Close()
|
|
}
|
|
}
|
|
|
|
func (pxy *XtcpProxy) InWorkConn(conn frpNet.Conn, m *msg.StartWorkConn) {
|
|
defer conn.Close()
|
|
var natHoleSidMsg msg.NatHoleSid
|
|
err := msg.ReadMsgInto(conn, &natHoleSidMsg)
|
|
if err != nil {
|
|
pxy.Error("xtcp read from workConn error: %v", err)
|
|
return
|
|
}
|
|
|
|
natHoleClientMsg := &msg.NatHoleClient{
|
|
ProxyName: pxy.cfg.ProxyName,
|
|
Sid: natHoleSidMsg.Sid,
|
|
}
|
|
raddr, _ := net.ResolveUDPAddr("udp",
|
|
fmt.Sprintf("%s:%d", pxy.clientCfg.ServerAddr, pxy.serverUDPPort))
|
|
clientConn, err := net.DialUDP("udp", nil, raddr)
|
|
defer clientConn.Close()
|
|
|
|
err = msg.WriteMsg(clientConn, natHoleClientMsg)
|
|
if err != nil {
|
|
pxy.Error("send natHoleClientMsg to server error: %v", err)
|
|
return
|
|
}
|
|
|
|
// Wait for client address at most 5 seconds.
|
|
var natHoleRespMsg msg.NatHoleResp
|
|
clientConn.SetReadDeadline(time.Now().Add(5 * time.Second))
|
|
|
|
buf := pool.GetBuf(1024)
|
|
n, err := clientConn.Read(buf)
|
|
if err != nil {
|
|
pxy.Error("get natHoleRespMsg error: %v", err)
|
|
return
|
|
}
|
|
err = msg.ReadMsgInto(bytes.NewReader(buf[:n]), &natHoleRespMsg)
|
|
if err != nil {
|
|
pxy.Error("get natHoleRespMsg error: %v", err)
|
|
return
|
|
}
|
|
clientConn.SetReadDeadline(time.Time{})
|
|
clientConn.Close()
|
|
|
|
if natHoleRespMsg.Error != "" {
|
|
pxy.Error("natHoleRespMsg get error info: %s", natHoleRespMsg.Error)
|
|
return
|
|
}
|
|
|
|
pxy.Trace("get natHoleRespMsg, sid [%s], client address [%s] visitor address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr, natHoleRespMsg.VisitorAddr)
|
|
|
|
// Send detect message
|
|
array := strings.Split(natHoleRespMsg.VisitorAddr, ":")
|
|
if len(array) <= 1 {
|
|
pxy.Error("get NatHoleResp visitor address error: %v", natHoleRespMsg.VisitorAddr)
|
|
}
|
|
laddr, _ := net.ResolveUDPAddr("udp", clientConn.LocalAddr().String())
|
|
/*
|
|
for i := 1000; i < 65000; i++ {
|
|
pxy.sendDetectMsg(array[0], int64(i), laddr, "a")
|
|
}
|
|
*/
|
|
port, err := strconv.ParseInt(array[1], 10, 64)
|
|
if err != nil {
|
|
pxy.Error("get natHoleResp visitor address error: %v", natHoleRespMsg.VisitorAddr)
|
|
return
|
|
}
|
|
pxy.sendDetectMsg(array[0], int(port), laddr, []byte(natHoleRespMsg.Sid))
|
|
pxy.Trace("send all detect msg done")
|
|
|
|
msg.WriteMsg(conn, &msg.NatHoleClientDetectOK{})
|
|
|
|
// Listen for clientConn's address and wait for visitor connection
|
|
lConn, err := net.ListenUDP("udp", laddr)
|
|
if err != nil {
|
|
pxy.Error("listen on visitorConn's local adress error: %v", err)
|
|
return
|
|
}
|
|
defer lConn.Close()
|
|
|
|
lConn.SetReadDeadline(time.Now().Add(8 * time.Second))
|
|
sidBuf := pool.GetBuf(1024)
|
|
var uAddr *net.UDPAddr
|
|
n, uAddr, err = lConn.ReadFromUDP(sidBuf)
|
|
if err != nil {
|
|
pxy.Warn("get sid from visitor error: %v", err)
|
|
return
|
|
}
|
|
lConn.SetReadDeadline(time.Time{})
|
|
if string(sidBuf[:n]) != natHoleRespMsg.Sid {
|
|
pxy.Warn("incorrect sid from visitor")
|
|
return
|
|
}
|
|
pool.PutBuf(sidBuf)
|
|
pxy.Info("nat hole connection make success, sid [%s]", natHoleRespMsg.Sid)
|
|
|
|
lConn.WriteToUDP(sidBuf[:n], uAddr)
|
|
|
|
kcpConn, err := frpNet.NewKcpConnFromUdp(lConn, false, natHoleRespMsg.VisitorAddr)
|
|
if err != nil {
|
|
pxy.Error("create kcp connection from udp connection error: %v", err)
|
|
return
|
|
}
|
|
|
|
fmuxCfg := fmux.DefaultConfig()
|
|
fmuxCfg.KeepAliveInterval = 5 * time.Second
|
|
fmuxCfg.LogOutput = ioutil.Discard
|
|
sess, err := fmux.Server(kcpConn, fmuxCfg)
|
|
if err != nil {
|
|
pxy.Error("create yamux server from kcp connection error: %v", err)
|
|
return
|
|
}
|
|
defer sess.Close()
|
|
muxConn, err := sess.Accept()
|
|
if err != nil {
|
|
pxy.Error("accept for yamux connection error: %v", err)
|
|
return
|
|
}
|
|
|
|
HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, pxy.proxyPlugin, &pxy.cfg.BaseProxyConf,
|
|
frpNet.WrapConn(muxConn), []byte(pxy.cfg.Sk), m)
|
|
}
|
|
|
|
func (pxy *XtcpProxy) sendDetectMsg(addr string, port int, laddr *net.UDPAddr, content []byte) (err error) {
|
|
daddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", addr, port))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
tConn, err := net.DialUDP("udp", laddr, daddr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
//uConn := ipv4.NewConn(tConn)
|
|
//uConn.SetTTL(3)
|
|
|
|
tConn.Write(content)
|
|
tConn.Close()
|
|
return nil
|
|
}
|
|
|
|
// UDP
|
|
type UdpProxy struct {
|
|
*BaseProxy
|
|
|
|
cfg *config.UdpProxyConf
|
|
|
|
localAddr *net.UDPAddr
|
|
readCh chan *msg.UdpPacket
|
|
|
|
// include msg.UdpPacket and msg.Ping
|
|
sendCh chan msg.Message
|
|
workConn frpNet.Conn
|
|
}
|
|
|
|
func (pxy *UdpProxy) Run() (err error) {
|
|
pxy.localAddr, err = net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", pxy.cfg.LocalIp, pxy.cfg.LocalPort))
|
|
if err != nil {
|
|
return
|
|
}
|
|
return
|
|
}
|
|
|
|
func (pxy *UdpProxy) Close() {
|
|
pxy.mu.Lock()
|
|
defer pxy.mu.Unlock()
|
|
|
|
if !pxy.closed {
|
|
pxy.closed = true
|
|
if pxy.workConn != nil {
|
|
pxy.workConn.Close()
|
|
}
|
|
if pxy.readCh != nil {
|
|
close(pxy.readCh)
|
|
}
|
|
if pxy.sendCh != nil {
|
|
close(pxy.sendCh)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (pxy *UdpProxy) InWorkConn(conn frpNet.Conn, m *msg.StartWorkConn) {
|
|
pxy.Info("incoming a new work connection for udp proxy, %s", conn.RemoteAddr().String())
|
|
// close resources releated with old workConn
|
|
pxy.Close()
|
|
|
|
pxy.mu.Lock()
|
|
pxy.workConn = conn
|
|
pxy.readCh = make(chan *msg.UdpPacket, 1024)
|
|
pxy.sendCh = make(chan msg.Message, 1024)
|
|
pxy.closed = false
|
|
pxy.mu.Unlock()
|
|
|
|
workConnReaderFn := func(conn net.Conn, readCh chan *msg.UdpPacket) {
|
|
for {
|
|
var udpMsg msg.UdpPacket
|
|
if errRet := msg.ReadMsgInto(conn, &udpMsg); errRet != nil {
|
|
pxy.Warn("read from workConn for udp error: %v", errRet)
|
|
return
|
|
}
|
|
if errRet := errors.PanicToError(func() {
|
|
pxy.Trace("get udp package from workConn: %s", udpMsg.Content)
|
|
readCh <- &udpMsg
|
|
}); errRet != nil {
|
|
pxy.Info("reader goroutine for udp work connection closed: %v", errRet)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
workConnSenderFn := func(conn net.Conn, sendCh chan msg.Message) {
|
|
defer func() {
|
|
pxy.Info("writer goroutine for udp work connection closed")
|
|
}()
|
|
var errRet error
|
|
for rawMsg := range sendCh {
|
|
switch m := rawMsg.(type) {
|
|
case *msg.UdpPacket:
|
|
pxy.Trace("send udp package to workConn: %s", m.Content)
|
|
case *msg.Ping:
|
|
pxy.Trace("send ping message to udp workConn")
|
|
}
|
|
if errRet = msg.WriteMsg(conn, rawMsg); errRet != nil {
|
|
pxy.Error("udp work write error: %v", errRet)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
heartbeatFn := func(conn net.Conn, sendCh chan msg.Message) {
|
|
var errRet error
|
|
for {
|
|
time.Sleep(time.Duration(30) * time.Second)
|
|
if errRet = errors.PanicToError(func() {
|
|
sendCh <- &msg.Ping{}
|
|
}); errRet != nil {
|
|
pxy.Trace("heartbeat goroutine for udp work connection closed")
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
go workConnSenderFn(pxy.workConn, pxy.sendCh)
|
|
go workConnReaderFn(pxy.workConn, pxy.readCh)
|
|
go heartbeatFn(pxy.workConn, pxy.sendCh)
|
|
udp.Forwarder(pxy.localAddr, pxy.readCh, pxy.sendCh)
|
|
}
|
|
|
|
// Common handler for tcp work connections.
|
|
func HandleTcpWorkConnection(localInfo *config.LocalSvrConf, proxyPlugin plugin.Plugin,
|
|
baseInfo *config.BaseProxyConf, workConn frpNet.Conn, encKey []byte, m *msg.StartWorkConn) {
|
|
|
|
var (
|
|
remote io.ReadWriteCloser
|
|
err error
|
|
)
|
|
remote = workConn
|
|
|
|
if baseInfo.UseEncryption {
|
|
remote, err = frpIo.WithEncryption(remote, encKey)
|
|
if err != nil {
|
|
workConn.Close()
|
|
workConn.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"
|
|
}
|
|
h := &pp.Header{
|
|
Command: pp.PROXY,
|
|
SourceAddress: net.ParseIP(m.SrcAddr),
|
|
SourcePort: m.SrcPort,
|
|
DestinationAddress: net.ParseIP(m.DstAddr),
|
|
DestinationPort: m.DstPort,
|
|
}
|
|
|
|
if h.SourceAddress.To16() == nil {
|
|
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
|
|
workConn.Debug("handle by plugin: %s", proxyPlugin.Name())
|
|
proxyPlugin.Handle(remote, workConn, extraInfo)
|
|
workConn.Debug("handle by plugin finished")
|
|
return
|
|
} else {
|
|
localConn, err := frpNet.ConnectServer("tcp", fmt.Sprintf("%s:%d", localInfo.LocalIp, localInfo.LocalPort))
|
|
if err != nil {
|
|
workConn.Close()
|
|
workConn.Error("connect to local service [%s:%d] error: %v", localInfo.LocalIp, localInfo.LocalPort, err)
|
|
return
|
|
}
|
|
|
|
workConn.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 {
|
|
localConn.Write(extraInfo)
|
|
}
|
|
|
|
frpIo.Join(localConn, remote)
|
|
workConn.Debug("join connections closed")
|
|
}
|
|
}
|