mirror of https://github.com/fatedier/frp.git
523 lines
15 KiB
Go
523 lines
15 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 server
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"crypto/rand"
|
|
"crypto/rsa"
|
|
"crypto/tls"
|
|
"crypto/x509"
|
|
"encoding/pem"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"math/big"
|
|
"net"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/fatedier/frp/assets"
|
|
"github.com/fatedier/frp/models/auth"
|
|
"github.com/fatedier/frp/models/config"
|
|
modelmetrics "github.com/fatedier/frp/models/metrics"
|
|
"github.com/fatedier/frp/models/msg"
|
|
"github.com/fatedier/frp/models/nathole"
|
|
plugin "github.com/fatedier/frp/models/plugin/server"
|
|
"github.com/fatedier/frp/server/controller"
|
|
"github.com/fatedier/frp/server/group"
|
|
"github.com/fatedier/frp/server/metrics"
|
|
"github.com/fatedier/frp/server/ports"
|
|
"github.com/fatedier/frp/server/proxy"
|
|
"github.com/fatedier/frp/server/visitor"
|
|
"github.com/fatedier/frp/utils/log"
|
|
frpNet "github.com/fatedier/frp/utils/net"
|
|
"github.com/fatedier/frp/utils/tcpmux"
|
|
"github.com/fatedier/frp/utils/util"
|
|
"github.com/fatedier/frp/utils/version"
|
|
"github.com/fatedier/frp/utils/vhost"
|
|
"github.com/fatedier/frp/utils/xlog"
|
|
|
|
"github.com/fatedier/golib/net/mux"
|
|
fmux "github.com/hashicorp/yamux"
|
|
)
|
|
|
|
const (
|
|
connReadTimeout time.Duration = 10 * time.Second
|
|
vhostReadWriteTimeout time.Duration = 30 * time.Second
|
|
)
|
|
|
|
// Server service
|
|
type Service struct {
|
|
// Dispatch connections to different handlers listen on same port
|
|
muxer *mux.Mux
|
|
|
|
// Accept connections from client
|
|
listener net.Listener
|
|
|
|
// Accept connections using kcp
|
|
kcpListener net.Listener
|
|
|
|
// Accept connections using websocket
|
|
websocketListener net.Listener
|
|
|
|
// Accept frp tls connections
|
|
tlsListener net.Listener
|
|
|
|
// Manage all controllers
|
|
ctlManager *ControlManager
|
|
|
|
// Manage all proxies
|
|
pxyManager *proxy.Manager
|
|
|
|
// Manage all plugins
|
|
pluginManager *plugin.Manager
|
|
|
|
// HTTP vhost router
|
|
httpVhostRouter *vhost.Routers
|
|
|
|
// All resource managers and controllers
|
|
rc *controller.ResourceController
|
|
|
|
// Verifies authentication based on selected method
|
|
authVerifier auth.Verifier
|
|
|
|
tlsConfig *tls.Config
|
|
|
|
cfg config.ServerCommonConf
|
|
}
|
|
|
|
func NewService(cfg config.ServerCommonConf) (svr *Service, err error) {
|
|
svr = &Service{
|
|
ctlManager: NewControlManager(),
|
|
pxyManager: proxy.NewManager(),
|
|
pluginManager: plugin.NewManager(),
|
|
rc: &controller.ResourceController{
|
|
VisitorManager: visitor.NewManager(),
|
|
TCPPortManager: ports.NewManager("tcp", cfg.ProxyBindAddr, cfg.AllowPorts),
|
|
UDPPortManager: ports.NewManager("udp", cfg.ProxyBindAddr, cfg.AllowPorts),
|
|
},
|
|
httpVhostRouter: vhost.NewRouters(),
|
|
authVerifier: auth.NewAuthVerifier(cfg.ServerConfig),
|
|
tlsConfig: generateTLSConfig(),
|
|
cfg: cfg,
|
|
}
|
|
|
|
// Create tcpmux httpconnect multiplexer.
|
|
if cfg.TCPMuxHTTPConnectPort > 0 {
|
|
var l net.Listener
|
|
l, err = net.Listen("tcp", fmt.Sprintf("%s:%d", cfg.ProxyBindAddr, cfg.TCPMuxHTTPConnectPort))
|
|
if err != nil {
|
|
err = fmt.Errorf("Create server listener error, %v", err)
|
|
return
|
|
}
|
|
|
|
svr.rc.TCPMuxHTTPConnectMuxer, err = tcpmux.NewHTTPConnectTCPMuxer(l, vhostReadWriteTimeout)
|
|
if err != nil {
|
|
err = fmt.Errorf("Create vhost tcpMuxer error, %v", err)
|
|
return
|
|
}
|
|
log.Info("tcpmux httpconnect multiplexer listen on %s:%d", cfg.ProxyBindAddr, cfg.TCPMuxHTTPConnectPort)
|
|
}
|
|
|
|
// Init all plugins
|
|
for name, options := range cfg.HTTPPlugins {
|
|
svr.pluginManager.Register(plugin.NewHTTPPluginOptions(options))
|
|
log.Info("plugin [%s] has been registered", name)
|
|
}
|
|
svr.rc.PluginManager = svr.pluginManager
|
|
|
|
// Init group controller
|
|
svr.rc.TCPGroupCtl = group.NewTCPGroupCtl(svr.rc.TCPPortManager)
|
|
|
|
// Init HTTP group controller
|
|
svr.rc.HTTPGroupCtl = group.NewHTTPGroupController(svr.httpVhostRouter)
|
|
|
|
// Init TCP mux group controller
|
|
svr.rc.TCPMuxGroupCtl = group.NewTCPMuxGroupCtl(svr.rc.TCPMuxHTTPConnectMuxer)
|
|
|
|
// Init 404 not found page
|
|
vhost.NotFoundPagePath = cfg.Custom404Page
|
|
|
|
var (
|
|
httpMuxOn bool
|
|
httpsMuxOn bool
|
|
)
|
|
if cfg.BindAddr == cfg.ProxyBindAddr {
|
|
if cfg.BindPort == cfg.VhostHTTPPort {
|
|
httpMuxOn = true
|
|
}
|
|
if cfg.BindPort == cfg.VhostHTTPSPort {
|
|
httpsMuxOn = true
|
|
}
|
|
}
|
|
|
|
// Listen for accepting connections from client.
|
|
ln, err := net.Listen("tcp", fmt.Sprintf("%s:%d", cfg.BindAddr, cfg.BindPort))
|
|
if err != nil {
|
|
err = fmt.Errorf("Create server listener error, %v", err)
|
|
return
|
|
}
|
|
|
|
svr.muxer = mux.NewMux(ln)
|
|
go svr.muxer.Serve()
|
|
ln = svr.muxer.DefaultListener()
|
|
|
|
svr.listener = ln
|
|
log.Info("frps tcp listen on %s:%d", cfg.BindAddr, cfg.BindPort)
|
|
|
|
// Listen for accepting connections from client using kcp protocol.
|
|
if cfg.KCPBindPort > 0 {
|
|
svr.kcpListener, err = frpNet.ListenKcp(cfg.BindAddr, cfg.KCPBindPort)
|
|
if err != nil {
|
|
err = fmt.Errorf("Listen on kcp address udp [%s:%d] error: %v", cfg.BindAddr, cfg.KCPBindPort, err)
|
|
return
|
|
}
|
|
log.Info("frps kcp listen on udp %s:%d", cfg.BindAddr, cfg.KCPBindPort)
|
|
}
|
|
|
|
// Listen for accepting connections from client using websocket protocol.
|
|
websocketPrefix := []byte("GET " + frpNet.FrpWebsocketPath)
|
|
websocketLn := svr.muxer.Listen(0, uint32(len(websocketPrefix)), func(data []byte) bool {
|
|
return bytes.Equal(data, websocketPrefix)
|
|
})
|
|
svr.websocketListener = frpNet.NewWebsocketListener(websocketLn)
|
|
|
|
// Create http vhost muxer.
|
|
if cfg.VhostHTTPPort > 0 {
|
|
rp := vhost.NewHTTPReverseProxy(vhost.HTTPReverseProxyOptions{
|
|
ResponseHeaderTimeoutS: cfg.VhostHTTPTimeout,
|
|
}, svr.httpVhostRouter)
|
|
svr.rc.HTTPReverseProxy = rp
|
|
|
|
address := fmt.Sprintf("%s:%d", cfg.ProxyBindAddr, cfg.VhostHTTPPort)
|
|
server := &http.Server{
|
|
Addr: address,
|
|
Handler: rp,
|
|
}
|
|
var l net.Listener
|
|
if httpMuxOn {
|
|
l = svr.muxer.ListenHttp(1)
|
|
} else {
|
|
l, err = net.Listen("tcp", address)
|
|
if err != nil {
|
|
err = fmt.Errorf("Create vhost http listener error, %v", err)
|
|
return
|
|
}
|
|
}
|
|
go server.Serve(l)
|
|
log.Info("http service listen on %s:%d", cfg.ProxyBindAddr, cfg.VhostHTTPPort)
|
|
}
|
|
|
|
// Create https vhost muxer.
|
|
if cfg.VhostHTTPSPort > 0 {
|
|
var l net.Listener
|
|
if httpsMuxOn {
|
|
l = svr.muxer.ListenHttps(1)
|
|
} else {
|
|
l, err = net.Listen("tcp", fmt.Sprintf("%s:%d", cfg.ProxyBindAddr, cfg.VhostHTTPSPort))
|
|
if err != nil {
|
|
err = fmt.Errorf("Create server listener error, %v", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
svr.rc.VhostHTTPSMuxer, err = vhost.NewHTTPSMuxer(l, vhostReadWriteTimeout)
|
|
if err != nil {
|
|
err = fmt.Errorf("Create vhost httpsMuxer error, %v", err)
|
|
return
|
|
}
|
|
log.Info("https service listen on %s:%d", cfg.ProxyBindAddr, cfg.VhostHTTPSPort)
|
|
}
|
|
|
|
// frp tls listener
|
|
svr.tlsListener = svr.muxer.Listen(1, 1, func(data []byte) bool {
|
|
return int(data[0]) == frpNet.FRPTLSHeadByte
|
|
})
|
|
|
|
// Create nat hole controller.
|
|
if cfg.BindUDPPort > 0 {
|
|
var nc *nathole.Controller
|
|
addr := fmt.Sprintf("%s:%d", cfg.BindAddr, cfg.BindUDPPort)
|
|
nc, err = nathole.NewController(addr)
|
|
if err != nil {
|
|
err = fmt.Errorf("Create nat hole controller error, %v", err)
|
|
return
|
|
}
|
|
svr.rc.NatHoleController = nc
|
|
log.Info("nat hole udp service listen on %s:%d", cfg.BindAddr, cfg.BindUDPPort)
|
|
}
|
|
|
|
var statsEnable bool
|
|
// Create dashboard web server.
|
|
if cfg.DashboardPort > 0 {
|
|
// Init dashboard assets
|
|
err = assets.Load(cfg.AssetsDir)
|
|
if err != nil {
|
|
err = fmt.Errorf("Load assets error: %v", err)
|
|
return
|
|
}
|
|
|
|
err = svr.RunDashboardServer(cfg.DashboardAddr, cfg.DashboardPort)
|
|
if err != nil {
|
|
err = fmt.Errorf("Create dashboard web server error, %v", err)
|
|
return
|
|
}
|
|
log.Info("Dashboard listen on %s:%d", cfg.DashboardAddr, cfg.DashboardPort)
|
|
statsEnable = true
|
|
}
|
|
if statsEnable {
|
|
modelmetrics.EnableMem()
|
|
if cfg.EnablePrometheus {
|
|
modelmetrics.EnablePrometheus()
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (svr *Service) Run() {
|
|
if svr.rc.NatHoleController != nil {
|
|
go svr.rc.NatHoleController.Run()
|
|
}
|
|
if svr.cfg.KCPBindPort > 0 {
|
|
go svr.HandleListener(svr.kcpListener)
|
|
}
|
|
|
|
go svr.HandleListener(svr.websocketListener)
|
|
go svr.HandleListener(svr.tlsListener)
|
|
|
|
svr.HandleListener(svr.listener)
|
|
}
|
|
|
|
func (svr *Service) handleConnection(ctx context.Context, conn net.Conn) {
|
|
xl := xlog.FromContextSafe(ctx)
|
|
|
|
var (
|
|
rawMsg msg.Message
|
|
err error
|
|
)
|
|
|
|
conn.SetReadDeadline(time.Now().Add(connReadTimeout))
|
|
if rawMsg, err = msg.ReadMsg(conn); err != nil {
|
|
log.Trace("Failed to read message: %v", err)
|
|
conn.Close()
|
|
return
|
|
}
|
|
conn.SetReadDeadline(time.Time{})
|
|
|
|
switch m := rawMsg.(type) {
|
|
case *msg.Login:
|
|
// server plugin hook
|
|
content := &plugin.LoginContent{
|
|
Login: *m,
|
|
}
|
|
retContent, err := svr.pluginManager.Login(content)
|
|
if err == nil {
|
|
m = &retContent.Login
|
|
err = svr.RegisterControl(conn, m)
|
|
}
|
|
|
|
// If login failed, send error message there.
|
|
// Otherwise send success message in control's work goroutine.
|
|
if err != nil {
|
|
xl.Warn("register control error: %v", err)
|
|
msg.WriteMsg(conn, &msg.LoginResp{
|
|
Version: version.Full(),
|
|
Error: util.GenerateResponseErrorString("register control error", err, svr.cfg.DetailedErrorsToClient),
|
|
})
|
|
conn.Close()
|
|
}
|
|
case *msg.NewWorkConn:
|
|
if err := svr.RegisterWorkConn(conn, m); err != nil {
|
|
conn.Close()
|
|
}
|
|
case *msg.NewVisitorConn:
|
|
if err = svr.RegisterVisitorConn(conn, m); err != nil {
|
|
xl.Warn("register visitor conn error: %v", err)
|
|
msg.WriteMsg(conn, &msg.NewVisitorConnResp{
|
|
ProxyName: m.ProxyName,
|
|
Error: util.GenerateResponseErrorString("register visitor conn error", err, svr.cfg.DetailedErrorsToClient),
|
|
})
|
|
conn.Close()
|
|
} else {
|
|
msg.WriteMsg(conn, &msg.NewVisitorConnResp{
|
|
ProxyName: m.ProxyName,
|
|
Error: "",
|
|
})
|
|
}
|
|
default:
|
|
log.Warn("Error message type for the new connection [%s]", conn.RemoteAddr().String())
|
|
conn.Close()
|
|
}
|
|
}
|
|
|
|
func (svr *Service) HandleListener(l net.Listener) {
|
|
// Listen for incoming connections from client.
|
|
for {
|
|
c, err := l.Accept()
|
|
if err != nil {
|
|
log.Warn("Listener for incoming connections from client closed")
|
|
return
|
|
}
|
|
// inject xlog object into net.Conn context
|
|
xl := xlog.New()
|
|
ctx := context.Background()
|
|
|
|
c = frpNet.NewContextConn(xlog.NewContext(ctx, xl), c)
|
|
|
|
log.Trace("start check TLS connection...")
|
|
originConn := c
|
|
c, err = frpNet.CheckAndEnableTLSServerConnWithTimeout(c, svr.tlsConfig, svr.cfg.TLSOnly, connReadTimeout)
|
|
if err != nil {
|
|
log.Warn("CheckAndEnableTLSServerConnWithTimeout error: %v", err)
|
|
originConn.Close()
|
|
continue
|
|
}
|
|
log.Trace("success check TLS connection")
|
|
|
|
// Start a new goroutine for dealing connections.
|
|
go func(ctx context.Context, frpConn net.Conn) {
|
|
if svr.cfg.TCPMux {
|
|
fmuxCfg := fmux.DefaultConfig()
|
|
fmuxCfg.KeepAliveInterval = 20 * time.Second
|
|
fmuxCfg.LogOutput = ioutil.Discard
|
|
session, err := fmux.Server(frpConn, fmuxCfg)
|
|
if err != nil {
|
|
log.Warn("Failed to create mux connection: %v", err)
|
|
frpConn.Close()
|
|
return
|
|
}
|
|
|
|
for {
|
|
stream, err := session.AcceptStream()
|
|
if err != nil {
|
|
log.Debug("Accept new mux stream error: %v", err)
|
|
session.Close()
|
|
return
|
|
}
|
|
go svr.handleConnection(ctx, stream)
|
|
}
|
|
} else {
|
|
svr.handleConnection(ctx, frpConn)
|
|
}
|
|
}(ctx, c)
|
|
}
|
|
}
|
|
|
|
func (svr *Service) RegisterControl(ctlConn net.Conn, loginMsg *msg.Login) (err error) {
|
|
// If client's RunID is empty, it's a new client, we just create a new controller.
|
|
// Otherwise, we check if there is one controller has the same run id. If so, we release previous controller and start new one.
|
|
if loginMsg.RunID == "" {
|
|
loginMsg.RunID, err = util.RandID()
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
|
|
ctx := frpNet.NewContextFromConn(ctlConn)
|
|
xl := xlog.FromContextSafe(ctx)
|
|
xl.AppendPrefix(loginMsg.RunID)
|
|
ctx = xlog.NewContext(ctx, xl)
|
|
xl.Info("client login info: ip [%s] version [%s] hostname [%s] os [%s] arch [%s]",
|
|
ctlConn.RemoteAddr().String(), loginMsg.Version, loginMsg.Hostname, loginMsg.Os, loginMsg.Arch)
|
|
|
|
// Check client version.
|
|
if ok, msg := version.Compat(loginMsg.Version); !ok {
|
|
err = fmt.Errorf("%s", msg)
|
|
return
|
|
}
|
|
|
|
// Check auth.
|
|
if err = svr.authVerifier.VerifyLogin(loginMsg); err != nil {
|
|
return
|
|
}
|
|
|
|
ctl := NewControl(ctx, svr.rc, svr.pxyManager, svr.pluginManager, svr.authVerifier, ctlConn, loginMsg, svr.cfg)
|
|
if oldCtl := svr.ctlManager.Add(loginMsg.RunID, ctl); oldCtl != nil {
|
|
oldCtl.allShutdown.WaitDone()
|
|
}
|
|
|
|
ctl.Start()
|
|
|
|
// for statistics
|
|
metrics.Server.NewClient()
|
|
|
|
go func() {
|
|
// block until control closed
|
|
ctl.WaitClosed()
|
|
svr.ctlManager.Del(loginMsg.RunID, ctl)
|
|
}()
|
|
return
|
|
}
|
|
|
|
// RegisterWorkConn register a new work connection to control and proxies need it.
|
|
func (svr *Service) RegisterWorkConn(workConn net.Conn, newMsg *msg.NewWorkConn) error {
|
|
xl := frpNet.NewLogFromConn(workConn)
|
|
ctl, exist := svr.ctlManager.GetByID(newMsg.RunID)
|
|
if !exist {
|
|
xl.Warn("No client control found for run id [%s]", newMsg.RunID)
|
|
return fmt.Errorf("no client control found for run id [%s]", newMsg.RunID)
|
|
}
|
|
// server plugin hook
|
|
content := &plugin.NewWorkConnContent{
|
|
User: plugin.UserInfo{
|
|
User: ctl.loginMsg.User,
|
|
Metas: ctl.loginMsg.Metas,
|
|
RunID: ctl.loginMsg.RunID,
|
|
},
|
|
NewWorkConn: *newMsg,
|
|
}
|
|
retContent, err := svr.pluginManager.NewWorkConn(content)
|
|
if err == nil {
|
|
newMsg = &retContent.NewWorkConn
|
|
// Check auth.
|
|
err = svr.authVerifier.VerifyNewWorkConn(newMsg)
|
|
}
|
|
if err != nil {
|
|
xl.Warn("invalid NewWorkConn with run id [%s]", newMsg.RunID)
|
|
msg.WriteMsg(workConn, &msg.StartWorkConn{
|
|
Error: util.GenerateResponseErrorString("invalid NewWorkConn", err, ctl.serverCfg.DetailedErrorsToClient),
|
|
})
|
|
return fmt.Errorf("invalid NewWorkConn with run id [%s]", newMsg.RunID)
|
|
}
|
|
return ctl.RegisterWorkConn(workConn)
|
|
}
|
|
|
|
func (svr *Service) RegisterVisitorConn(visitorConn net.Conn, newMsg *msg.NewVisitorConn) error {
|
|
return svr.rc.VisitorManager.NewConn(newMsg.ProxyName, visitorConn, newMsg.Timestamp, newMsg.SignKey,
|
|
newMsg.UseEncryption, newMsg.UseCompression)
|
|
}
|
|
|
|
// Setup a bare-bones TLS config for the server
|
|
func generateTLSConfig() *tls.Config {
|
|
key, err := rsa.GenerateKey(rand.Reader, 1024)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
template := x509.Certificate{SerialNumber: big.NewInt(1)}
|
|
certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
|
|
certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
|
|
|
|
tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return &tls.Config{Certificates: []tls.Certificate{tlsCert}}
|
|
}
|