541 lines
14 KiB
Go
541 lines
14 KiB
Go
package main
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import (
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"bufio"
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"crypto/tls"
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"crypto/x509"
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"net"
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"net/url"
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"os"
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"runtime"
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"strconv"
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"strings"
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"time"
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"github.com/go-log/log"
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"github.com/go-redis/redis"
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"github.com/jinzhu/configor"
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"github.com/xiaoli/gost"
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)
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var (
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options struct {
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ChainNodes, ServeNodes stringList
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Debug bool
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}
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redisClient *redis.Client
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)
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func init() {
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gost.SetLogger(&gost.LogLogger{})
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var (
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configureFile string
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printVersion bool
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)
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flag.Var(&options.ChainNodes, "F", "forward address, can make a forward chain")
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flag.Var(&options.ServeNodes, "L", "listen address, can listen on multiple ports")
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flag.StringVar(&configureFile, "C", "", "configure file")
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flag.BoolVar(&options.Debug, "D", false, "enable debug log")
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flag.BoolVar(&printVersion, "V", false, "print version")
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flag.Parse()
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if err := loadConfigureFile(configureFile); err != nil {
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log.Log(err)
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os.Exit(1)
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}
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if flag.NFlag() == 0 {
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flag.PrintDefaults()
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os.Exit(0)
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}
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if printVersion {
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fmt.Fprintf(os.Stderr, "gost %s (%s)\n", gost.Version, runtime.Version())
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os.Exit(0)
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}
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gost.Debug = options.Debug
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}
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func main() {
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chain, err := initChain()
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if err != nil {
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log.Log(err)
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os.Exit(1)
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}
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if err := serve(chain); err != nil {
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log.Log(err)
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os.Exit(1)
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}
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select {}
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}
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func initChain() (*gost.Chain, error) {
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chain := gost.NewChain()
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for _, ns := range options.ChainNodes {
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node, err := gost.ParseNode(ns)
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if err != nil {
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return nil, err
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}
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users, err := parseUsers(node.Values.Get("secrets"))
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if err != nil {
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return nil, err
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}
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if node.User == nil && len(users) > 0 {
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node.User = users[0]
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}
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serverName, _, _ := net.SplitHostPort(node.Addr)
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if serverName == "" {
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serverName = "localhost" // default server name
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}
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rootCAs, err := loadCA(node.Values.Get("ca"))
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if err != nil {
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return nil, err
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}
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tlsCfg := &tls.Config{
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ServerName: serverName,
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InsecureSkipVerify: !toBool(node.Values.Get("secure")),
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RootCAs: rootCAs,
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}
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var tr gost.Transporter
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switch node.Transport {
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case "tls":
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tr = gost.TLSTransporter()
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case "ws":
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wsOpts := &gost.WSOptions{}
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wsOpts.EnableCompression = toBool(node.Values.Get("compression"))
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wsOpts.ReadBufferSize, _ = strconv.Atoi(node.Values.Get("rbuf"))
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wsOpts.WriteBufferSize, _ = strconv.Atoi(node.Values.Get("wbuf"))
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wsOpts.UserAgent = node.Values.Get("agent")
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tr = gost.WSTransporter(wsOpts)
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case "wss":
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wsOpts := &gost.WSOptions{}
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wsOpts.EnableCompression = toBool(node.Values.Get("compression"))
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wsOpts.ReadBufferSize, _ = strconv.Atoi(node.Values.Get("rbuf"))
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wsOpts.WriteBufferSize, _ = strconv.Atoi(node.Values.Get("wbuf"))
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tr = gost.WSSTransporter(wsOpts)
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case "kcp":
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if !chain.IsEmpty() {
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return nil, errors.New("KCP must be the first node in the proxy chain")
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}
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config, err := parseKCPConfig(node.Values.Get("c"))
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if err != nil {
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return nil, err
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}
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tr = gost.KCPTransporter(config)
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case "ssh":
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if node.Protocol == "direct" || node.Protocol == "remote" || node.Protocol == "forward" {
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tr = gost.SSHForwardTransporter()
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} else {
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tr = gost.SSHTunnelTransporter()
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}
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node.DialOptions = append(node.DialOptions,
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gost.ChainDialOption(chain),
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)
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chain = gost.NewChain() // cutoff the chain for multiplex
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case "quic":
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if !chain.IsEmpty() {
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return nil, errors.New("QUIC must be the first node in the proxy chain")
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}
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config := &gost.QUICConfig{
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TLSConfig: tlsCfg,
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KeepAlive: toBool(node.Values.Get("keepalive")),
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}
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tr = gost.QUICTransporter(config)
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case "http2":
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tr = gost.HTTP2Transporter(tlsCfg)
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node.DialOptions = append(node.DialOptions,
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gost.ChainDialOption(chain),
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)
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chain = gost.NewChain() // cutoff the chain for multiplex
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case "h2":
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tr = gost.H2Transporter(tlsCfg)
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node.DialOptions = append(node.DialOptions,
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gost.ChainDialOption(chain),
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)
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chain = gost.NewChain() // cutoff the chain for multiplex
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case "h2c":
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tr = gost.H2CTransporter()
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node.DialOptions = append(node.DialOptions,
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gost.ChainDialOption(chain),
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)
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chain = gost.NewChain() // cutoff the chain for multiplex
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case "obfs4":
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if err := gost.Obfs4Init(node, false); err != nil {
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return nil, err
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}
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tr = gost.Obfs4Transporter()
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default:
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tr = gost.TCPTransporter()
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}
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var connector gost.Connector
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switch node.Protocol {
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case "http2":
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connector = gost.HTTP2Connector(node.User)
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case "socks", "socks5":
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connector = gost.SOCKS5Connector(node.User)
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case "socks4":
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connector = gost.SOCKS4Connector()
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case "socks4a":
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connector = gost.SOCKS4AConnector()
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case "ss":
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connector = gost.ShadowConnector(node.User)
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case "direct", "forward":
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connector = gost.SSHDirectForwardConnector()
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case "remote":
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connector = gost.SSHRemoteForwardConnector()
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case "http":
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fallthrough
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default:
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node.Protocol = "http" // default protocol is HTTP
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connector = gost.HTTPConnector(node.User)
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}
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timeout, _ := strconv.Atoi(node.Values.Get("timeout"))
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node.DialOptions = append(node.DialOptions,
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gost.TimeoutDialOption(time.Duration(timeout)*time.Second),
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gost.IPDialOption(parseIP(node.Values.Get("ip"))...),
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)
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interval, _ := strconv.Atoi(node.Values.Get("ping"))
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node.HandshakeOptions = append(node.HandshakeOptions,
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gost.AddrHandshakeOption(node.Addr),
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gost.UserHandshakeOption(node.User),
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gost.TLSConfigHandshakeOption(tlsCfg),
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gost.IntervalHandshakeOption(time.Duration(interval)*time.Second),
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)
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node.Client = &gost.Client{
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Connector: connector,
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Transporter: tr,
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}
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chain.AddNode(node)
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}
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return chain, nil
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}
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func serve(chain *gost.Chain) error {
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for _, ns := range options.ServeNodes {
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node, err := gost.ParseNode(ns)
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if err != nil {
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return err
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}
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users, err := parseUsers(node.Values.Get("secrets"))
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if err != nil {
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return err
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}
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if node.User != nil {
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users = append(users, node.User)
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}
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redisClient, err := parseRedisUsersAuth(node.Values.Get("redis"))
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if err != nil {
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return err
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}
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certFile, keyFile := node.Values.Get("cert"), node.Values.Get("key")
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tlsCfg, err := tlsConfig(certFile, keyFile)
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if err != nil && certFile != "" && keyFile != "" {
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return err
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}
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var ln gost.Listener
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switch node.Transport {
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case "tls":
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ln, err = gost.TLSListener(node.Addr, tlsCfg)
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case "ws":
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wsOpts := &gost.WSOptions{}
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wsOpts.EnableCompression = toBool(node.Values.Get("compression"))
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wsOpts.ReadBufferSize, _ = strconv.Atoi(node.Values.Get("rbuf"))
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wsOpts.WriteBufferSize, _ = strconv.Atoi(node.Values.Get("wbuf"))
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ln, err = gost.WSListener(node.Addr, wsOpts)
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case "wss":
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wsOpts := &gost.WSOptions{}
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wsOpts.EnableCompression = toBool(node.Values.Get("compression"))
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wsOpts.ReadBufferSize, _ = strconv.Atoi(node.Values.Get("rbuf"))
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wsOpts.WriteBufferSize, _ = strconv.Atoi(node.Values.Get("wbuf"))
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ln, err = gost.WSSListener(node.Addr, tlsCfg, wsOpts)
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case "kcp":
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config, er := parseKCPConfig(node.Values.Get("c"))
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if er != nil {
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return er
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}
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ln, err = gost.KCPListener(node.Addr, config)
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case "ssh":
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config := &gost.SSHConfig{
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Users: users,
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TLSConfig: tlsCfg,
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}
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if node.Protocol == "forward" {
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ln, err = gost.TCPListener(node.Addr)
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} else {
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ln, err = gost.SSHTunnelListener(node.Addr, config)
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}
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case "quic":
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config := &gost.QUICConfig{
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TLSConfig: tlsCfg,
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KeepAlive: toBool(node.Values.Get("keepalive")),
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}
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timeout, _ := strconv.Atoi(node.Values.Get("timeout"))
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config.Timeout = time.Duration(timeout) * time.Second
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ln, err = gost.QUICListener(node.Addr, config)
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case "http2":
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ln, err = gost.HTTP2Listener(node.Addr, tlsCfg)
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case "h2":
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ln, err = gost.H2Listener(node.Addr, tlsCfg)
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case "h2c":
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ln, err = gost.H2CListener(node.Addr)
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case "obfs4":
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if err = gost.Obfs4Init(node, true); err != nil {
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return err
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}
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ln, err = gost.Obfs4Listener(node.Addr)
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case "tcp":
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ln, err = gost.TCPListener(node.Addr)
|
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case "rtcp":
|
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if chain.LastNode().Protocol == "forward" && chain.LastNode().Transport == "ssh" {
|
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chain.Nodes()[len(chain.Nodes())-1].Client.Connector = gost.SSHRemoteForwardConnector()
|
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}
|
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ln, err = gost.TCPRemoteForwardListener(node.Addr, chain)
|
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case "udp":
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ttl, _ := strconv.Atoi(node.Values.Get("ttl"))
|
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ln, err = gost.UDPDirectForwardListener(node.Addr, time.Duration(ttl)*time.Second)
|
|
case "rudp":
|
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ttl, _ := strconv.Atoi(node.Values.Get("ttl"))
|
|
ln, err = gost.UDPRemoteForwardListener(node.Addr, chain, time.Duration(ttl)*time.Second)
|
|
case "ssu":
|
|
ttl, _ := strconv.Atoi(node.Values.Get("ttl"))
|
|
ln, err = gost.ShadowUDPListener(node.Addr, node.User, time.Duration(ttl)*time.Second)
|
|
default:
|
|
ln, err = gost.TCPListener(node.Addr)
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var whitelist, blacklist *gost.Permissions
|
|
if node.Values.Get("whitelist") != "" {
|
|
if whitelist, err = gost.ParsePermissions(node.Values.Get("whitelist")); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if node.Values.Get("blacklist") != "" {
|
|
if blacklist, err = gost.ParsePermissions(node.Values.Get("blacklist")); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
var handlerOptions []gost.HandlerOption
|
|
|
|
handlerOptions = append(handlerOptions,
|
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gost.AddrHandlerOption(node.Addr),
|
|
gost.ChainHandlerOption(chain),
|
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gost.UsersHandlerOption(users...),
|
|
gost.TLSConfigHandlerOption(tlsCfg),
|
|
gost.WhitelistHandlerOption(whitelist),
|
|
gost.BlacklistHandlerOption(blacklist),
|
|
gost.RedisClientHandlerOption(redisClient),
|
|
)
|
|
var handler gost.Handler
|
|
switch node.Protocol {
|
|
case "http2":
|
|
handler = gost.HTTP2Handler(handlerOptions...)
|
|
case "socks", "socks5":
|
|
handler = gost.SOCKS5Handler(handlerOptions...)
|
|
case "socks4", "socks4a":
|
|
handler = gost.SOCKS4Handler(handlerOptions...)
|
|
case "ss":
|
|
handler = gost.ShadowHandler(handlerOptions...)
|
|
case "http":
|
|
handler = gost.HTTPHandler(handlerOptions...)
|
|
case "tcp":
|
|
handler = gost.TCPDirectForwardHandler(node.Remote, handlerOptions...)
|
|
case "rtcp":
|
|
handler = gost.TCPRemoteForwardHandler(node.Remote, handlerOptions...)
|
|
case "udp":
|
|
handler = gost.UDPDirectForwardHandler(node.Remote, handlerOptions...)
|
|
case "rudp":
|
|
handler = gost.UDPRemoteForwardHandler(node.Remote, handlerOptions...)
|
|
case "forward":
|
|
handler = gost.SSHForwardHandler(handlerOptions...)
|
|
case "redirect":
|
|
handler = gost.TCPRedirectHandler(handlerOptions...)
|
|
case "ssu":
|
|
handler = gost.ShadowUDPdHandler(handlerOptions...)
|
|
default:
|
|
handler = gost.AutoHandler(handlerOptions...)
|
|
}
|
|
srv := &gost.Server{Listener: ln}
|
|
go srv.Serve(handler)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Load the certificate from cert and key files, will use the default certificate if the provided info are invalid.
|
|
func tlsConfig(certFile, keyFile string) (*tls.Config, error) {
|
|
if certFile == "" {
|
|
certFile = "cert.pem"
|
|
}
|
|
if keyFile == "" {
|
|
keyFile = "key.pem"
|
|
}
|
|
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &tls.Config{Certificates: []tls.Certificate{cert}}, nil
|
|
}
|
|
|
|
func loadCA(caFile string) (cp *x509.CertPool, err error) {
|
|
if caFile == "" {
|
|
return
|
|
}
|
|
cp = x509.NewCertPool()
|
|
data, err := ioutil.ReadFile(caFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !cp.AppendCertsFromPEM(data) {
|
|
return nil, errors.New("AppendCertsFromPEM failed")
|
|
}
|
|
return
|
|
}
|
|
|
|
func loadConfigureFile(configureFile string) error {
|
|
if configureFile == "" {
|
|
return nil
|
|
}
|
|
content, err := ioutil.ReadFile(configureFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := json.Unmarshal(content, &options); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type stringList []string
|
|
|
|
func (l *stringList) String() string {
|
|
return fmt.Sprintf("%s", *l)
|
|
}
|
|
func (l *stringList) Set(value string) error {
|
|
*l = append(*l, value)
|
|
return nil
|
|
}
|
|
|
|
func toBool(s string) bool {
|
|
if b, _ := strconv.ParseBool(s); b {
|
|
return b
|
|
}
|
|
n, _ := strconv.Atoi(s)
|
|
return n > 0
|
|
}
|
|
|
|
func parseKCPConfig(configFile string) (*gost.KCPConfig, error) {
|
|
if configFile == "" {
|
|
return nil, nil
|
|
}
|
|
file, err := os.Open(configFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
|
|
config := &gost.KCPConfig{}
|
|
if err = json.NewDecoder(file).Decode(config); err != nil {
|
|
return nil, err
|
|
}
|
|
return config, nil
|
|
}
|
|
|
|
func parseUsers(authFile string) (users []*url.Userinfo, err error) {
|
|
if authFile == "" {
|
|
return
|
|
}
|
|
|
|
file, err := os.Open(authFile)
|
|
if err != nil {
|
|
return
|
|
}
|
|
scanner := bufio.NewScanner(file)
|
|
for scanner.Scan() {
|
|
line := strings.TrimSpace(scanner.Text())
|
|
if line == "" || strings.HasPrefix(line, "#") {
|
|
continue
|
|
}
|
|
|
|
s := strings.SplitN(line, " ", 2)
|
|
if len(s) == 1 {
|
|
users = append(users, url.User(strings.TrimSpace(s[0])))
|
|
} else if len(s) == 2 {
|
|
users = append(users, url.UserPassword(strings.TrimSpace(s[0]), strings.TrimSpace(s[1])))
|
|
}
|
|
}
|
|
|
|
err = scanner.Err()
|
|
return
|
|
}
|
|
|
|
func parseRedisUsersAuth(configFile string) (client *redis.Client, err error) {
|
|
if configFile == "" {
|
|
return
|
|
}
|
|
|
|
var Config = struct {
|
|
RedisServer struct {
|
|
Address string `default:"localhost:6379"`
|
|
Password string `default:""`
|
|
DB int `default:0`
|
|
}
|
|
}{}
|
|
|
|
configor.Load(&Config, configFile)
|
|
client = redis.NewClient(&redis.Options{
|
|
Addr: Config.RedisServer.Address,
|
|
Password: Config.RedisServer.Password,
|
|
DB: Config.RedisServer.DB,
|
|
})
|
|
|
|
_, err = client.Ping().Result()
|
|
|
|
return
|
|
}
|
|
|
|
func parseIP(s string) (ips []string) {
|
|
if s == "" {
|
|
return nil
|
|
}
|
|
file, err := os.Open(s)
|
|
if err != nil {
|
|
ss := strings.Split(s, ",")
|
|
for _, s := range ss {
|
|
if ip := net.ParseIP(s); ip != nil {
|
|
ips = append(ips, s)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
scanner := bufio.NewScanner(file)
|
|
for scanner.Scan() {
|
|
line := strings.TrimSpace(scanner.Text())
|
|
if line == "" || strings.HasPrefix(line, "#") {
|
|
continue
|
|
}
|
|
if ip := net.ParseIP(line); ip != nil {
|
|
ips = append(ips, line)
|
|
}
|
|
}
|
|
return
|
|
}
|