frp/cmd/frpc/sub/root.go

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// Copyright 2018 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 sub
import (
"context"
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"fmt"
"net"
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"os"
"os/signal"
"strconv"
"strings"
"syscall"
"time"
"github.com/spf13/cobra"
"github.com/fatedier/frp/client"
"github.com/fatedier/frp/models/auth"
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"github.com/fatedier/frp/models/config"
"github.com/fatedier/frp/utils/log"
"github.com/fatedier/frp/utils/version"
)
const (
CfgFileTypeIni = iota
CfgFileTypeCmd
)
var (
cfgFile string
showVersion bool
serverAddr string
user string
protocol string
token string
logLevel string
logFile string
logMaxDays int
disableLogColor bool
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proxyName string
localIp string
localPort int
remotePort int
useEncryption bool
useCompression bool
customDomains string
subDomain string
httpUser string
httpPwd string
locations string
hostHeaderRewrite string
role string
sk string
multiplexer string
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serverName string
bindAddr string
bindPort int
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kcpDoneCh chan struct{}
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)
func init() {
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rootCmd.PersistentFlags().StringVarP(&cfgFile, "config", "c", "./frpc.ini", "config file of frpc")
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rootCmd.PersistentFlags().BoolVarP(&showVersion, "version", "v", false, "version of frpc")
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kcpDoneCh = make(chan struct{})
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}
var rootCmd = &cobra.Command{
Use: "frpc",
Short: "frpc is the client of frp (https://github.com/fatedier/frp)",
RunE: func(cmd *cobra.Command, args []string) error {
if showVersion {
fmt.Println(version.Full())
return nil
}
// Do not show command usage here.
err := runClient(cfgFile)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
return nil
},
}
func Execute() {
if err := rootCmd.Execute(); err != nil {
os.Exit(1)
}
}
func handleSignal(svr *client.Service) {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
<-ch
svr.Close()
time.Sleep(250 * time.Millisecond)
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close(kcpDoneCh)
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}
func parseClientCommonCfg(fileType int, content string) (cfg config.ClientCommonConf, err error) {
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if fileType == CfgFileTypeIni {
cfg, err = parseClientCommonCfgFromIni(content)
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} else if fileType == CfgFileTypeCmd {
cfg, err = parseClientCommonCfgFromCmd()
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}
if err != nil {
return
}
err = cfg.Check()
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if err != nil {
return
}
return
}
func parseClientCommonCfgFromIni(content string) (config.ClientCommonConf, error) {
cfg, err := config.UnmarshalClientConfFromIni(content)
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if err != nil {
return config.ClientCommonConf{}, err
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}
return cfg, err
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}
func parseClientCommonCfgFromCmd() (cfg config.ClientCommonConf, err error) {
cfg = config.GetDefaultClientConf()
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strs := strings.Split(serverAddr, ":")
if len(strs) < 2 {
err = fmt.Errorf("invalid server_addr")
return
}
if strs[0] != "" {
cfg.ServerAddr = strs[0]
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}
cfg.ServerPort, err = strconv.Atoi(strs[1])
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if err != nil {
err = fmt.Errorf("invalid server_addr")
return
}
cfg.User = user
cfg.Protocol = protocol
cfg.LogLevel = logLevel
cfg.LogFile = logFile
cfg.LogMaxDays = int64(logMaxDays)
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if logFile == "console" {
cfg.LogWay = "console"
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} else {
cfg.LogWay = "file"
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}
cfg.DisableLogColor = disableLogColor
// Only token authentication is supported in cmd mode
cfg.AuthClientConfig = auth.GetDefaultAuthClientConf()
cfg.Token = token
return
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}
func runClient(cfgFilePath string) (err error) {
var content string
content, err = config.GetRenderedConfFromFile(cfgFilePath)
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if err != nil {
return
}
cfg, err := parseClientCommonCfg(CfgFileTypeIni, content)
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if err != nil {
return
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}
pxyCfgs, visitorCfgs, err := config.LoadAllConfFromIni(cfg.User, content, cfg.Start)
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if err != nil {
return err
}
err = startService(cfg, pxyCfgs, visitorCfgs, cfgFilePath)
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return
}
func startService(cfg config.ClientCommonConf, pxyCfgs map[string]config.ProxyConf, visitorCfgs map[string]config.VisitorConf, cfgFile string) (err error) {
log.InitLog(cfg.LogWay, cfg.LogFile, cfg.LogLevel,
cfg.LogMaxDays, cfg.DisableLogColor)
if cfg.DnsServer != "" {
s := cfg.DnsServer
if !strings.Contains(s, ":") {
s += ":53"
}
// Change default dns server for frpc
net.DefaultResolver = &net.Resolver{
PreferGo: true,
Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
return net.Dial("udp", s)
},
}
}
svr, errRet := client.NewService(cfg, pxyCfgs, visitorCfgs, cfgFile)
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if errRet != nil {
err = errRet
return
}
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// Capture the exit signal if we use kcp.
if cfg.Protocol == "kcp" {
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go handleSignal(svr)
}
err = svr.Run()
if cfg.Protocol == "kcp" {
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<-kcpDoneCh
}
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return
}