2017-03-22 19:01:25 +01:00
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// Copyright 2017 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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2017-03-08 19:03:47 +01:00
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package server
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import (
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"fmt"
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"time"
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"github.com/fatedier/frp/assets"
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"github.com/fatedier/frp/models/config"
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"github.com/fatedier/frp/models/msg"
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"github.com/fatedier/frp/utils/log"
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2017-05-17 11:47:20 +02:00
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frpNet "github.com/fatedier/frp/utils/net"
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2017-03-08 19:03:47 +01:00
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"github.com/fatedier/frp/utils/util"
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"github.com/fatedier/frp/utils/version"
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"github.com/fatedier/frp/utils/vhost"
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2017-05-17 11:47:20 +02:00
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"github.com/xtaci/smux"
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2017-03-08 19:03:47 +01:00
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)
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2017-05-09 18:46:42 +02:00
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const (
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connReadTimeout time.Duration = 10 * time.Second
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)
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2017-03-22 19:01:25 +01:00
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var ServerService *Service
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2017-03-08 19:03:47 +01:00
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// Server service.
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type Service struct {
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// Accept connections from client.
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listener frpNet.Listener
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// For http proxies, route requests to different clients by hostname and other infomation.
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VhostHttpMuxer *vhost.HttpMuxer
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// For https proxies, route requests to different clients by hostname and other infomation.
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VhostHttpsMuxer *vhost.HttpsMuxer
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// Manage all controllers.
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ctlManager *ControlManager
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// Manage all proxies.
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pxyManager *ProxyManager
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}
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func NewService() (svr *Service, err error) {
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svr = &Service{
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ctlManager: NewControlManager(),
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pxyManager: NewProxyManager(),
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}
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// Init assets.
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err = assets.Load(config.ServerCommonCfg.AssetsDir)
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if err != nil {
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err = fmt.Errorf("Load assets error: %v", err)
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return
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}
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// Listen for accepting connections from client.
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svr.listener, err = frpNet.ListenTcp(config.ServerCommonCfg.BindAddr, config.ServerCommonCfg.BindPort)
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2017-03-08 19:03:47 +01:00
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if err != nil {
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err = fmt.Errorf("Create server listener error, %v", err)
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return
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}
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// Create http vhost muxer.
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if config.ServerCommonCfg.VhostHttpPort != 0 {
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var l frpNet.Listener
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l, err = frpNet.ListenTcp(config.ServerCommonCfg.BindAddr, config.ServerCommonCfg.VhostHttpPort)
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2017-03-08 19:03:47 +01:00
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if err != nil {
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err = fmt.Errorf("Create vhost http listener error, %v", err)
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return
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}
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svr.VhostHttpMuxer, err = vhost.NewHttpMuxer(l, 30*time.Second)
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if err != nil {
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err = fmt.Errorf("Create vhost httpMuxer error, %v", err)
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return
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}
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}
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// Create https vhost muxer.
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if config.ServerCommonCfg.VhostHttpsPort != 0 {
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var l frpNet.Listener
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l, err = frpNet.ListenTcp(config.ServerCommonCfg.BindAddr, config.ServerCommonCfg.VhostHttpsPort)
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if err != nil {
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err = fmt.Errorf("Create vhost https listener error, %v", err)
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return
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}
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svr.VhostHttpsMuxer, err = vhost.NewHttpsMuxer(l, 30*time.Second)
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if err != nil {
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err = fmt.Errorf("Create vhost httpsMuxer error, %v", err)
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return
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}
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}
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// Create dashboard web server.
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if config.ServerCommonCfg.DashboardPort != 0 {
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err = RunDashboardServer(config.ServerCommonCfg.BindAddr, config.ServerCommonCfg.DashboardPort)
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if err != nil {
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err = fmt.Errorf("Create dashboard web server error, %v", err)
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return
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}
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2017-05-19 12:38:31 +02:00
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log.Info("Dashboard listen on %s:%d", config.ServerCommonCfg.BindAddr, config.ServerCommonCfg.DashboardPort)
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}
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return
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}
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func (svr *Service) Run() {
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// Listen for incoming connections from client.
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for {
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c, err := svr.listener.Accept()
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if err != nil {
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log.Warn("Listener for incoming connections from client closed")
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return
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}
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// Start a new goroutine for dealing connections.
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go func(frpConn frpNet.Conn) {
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dealFn := func(conn frpNet.Conn) {
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var rawMsg msg.Message
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conn.SetReadDeadline(time.Now().Add(connReadTimeout))
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if rawMsg, err = msg.ReadMsg(conn); err != nil {
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log.Warn("Failed to read message: %v", err)
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conn.Close()
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return
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}
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conn.SetReadDeadline(time.Time{})
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switch m := rawMsg.(type) {
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case *msg.Login:
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err = svr.RegisterControl(conn, m)
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// If login failed, send error message there.
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// Otherwise send success message in control's work goroutine.
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if err != nil {
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conn.Warn("%v", err)
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msg.WriteMsg(conn, &msg.LoginResp{
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Version: version.Full(),
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Error: err.Error(),
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})
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conn.Close()
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}
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case *msg.NewWorkConn:
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svr.RegisterWorkConn(conn, m)
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default:
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log.Warn("Error message type for the new connection [%s]", conn.RemoteAddr().String())
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conn.Close()
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}
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2017-03-08 19:03:47 +01:00
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}
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2017-05-17 11:47:20 +02:00
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if config.ServerCommonCfg.TcpMux {
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session, err := smux.Server(frpConn, nil)
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if err != nil {
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log.Warn("Failed to create mux connection: %v", err)
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frpConn.Close()
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return
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}
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for {
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stream, err := session.AcceptStream()
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if err != nil {
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log.Warn("Accept new mux stream error: %v", err)
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2017-05-17 19:51:32 +02:00
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session.Close()
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return
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}
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wrapConn := frpNet.WrapConn(stream)
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go dealFn(wrapConn)
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}
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} else {
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dealFn(frpConn)
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}
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}(c)
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}
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}
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2017-05-17 11:47:20 +02:00
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func (svr *Service) RegisterControl(ctlConn frpNet.Conn, loginMsg *msg.Login) (err error) {
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ctlConn.Info("client login info: ip [%s] version [%s] hostname [%s] os [%s] arch [%s]",
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ctlConn.RemoteAddr().String(), loginMsg.Version, loginMsg.Hostname, loginMsg.Os, loginMsg.Arch)
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// Check client version.
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if ok, msg := version.Compat(loginMsg.Version); !ok {
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err = fmt.Errorf("%s", msg)
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return
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}
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// Check auth.
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nowTime := time.Now().Unix()
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if config.ServerCommonCfg.AuthTimeout != 0 && nowTime-loginMsg.Timestamp > config.ServerCommonCfg.AuthTimeout {
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err = fmt.Errorf("authorization timeout")
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return
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}
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if util.GetAuthKey(config.ServerCommonCfg.PrivilegeToken, loginMsg.Timestamp) != loginMsg.PrivilegeKey {
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err = fmt.Errorf("authorization failed")
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return
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}
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// If client's RunId is empty, it's a new client, we just create a new controller.
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// Otherwise, we check if there is one controller has the same run id. If so, we release previous controller and start new one.
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if loginMsg.RunId == "" {
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loginMsg.RunId, err = util.RandId()
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if err != nil {
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return
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}
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}
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ctl := NewControl(svr, ctlConn, loginMsg)
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if oldCtl := svr.ctlManager.Add(loginMsg.RunId, ctl); oldCtl != nil {
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oldCtl.allShutdown.WaitDown()
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}
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ctlConn.AddLogPrefix(loginMsg.RunId)
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ctl.Start()
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2017-03-22 19:01:25 +01:00
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// for statistics
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StatsNewClient()
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return
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}
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// RegisterWorkConn register a new work connection to control and proxies need it.
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func (svr *Service) RegisterWorkConn(workConn frpNet.Conn, newMsg *msg.NewWorkConn) {
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ctl, exist := svr.ctlManager.GetById(newMsg.RunId)
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if !exist {
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workConn.Warn("No client control found for run id [%s]", newMsg.RunId)
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return
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}
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ctl.RegisterWorkConn(workConn)
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return
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}
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func (svr *Service) RegisterProxy(name string, pxy Proxy) error {
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err := svr.pxyManager.Add(name, pxy)
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return err
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}
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func (svr *Service) DelProxy(name string) {
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svr.pxyManager.Del(name)
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}
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