2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2017 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 // Simple secure, DPI/censorship-resistant free software VPN daemon client.
27 "github.com/Sirupsen/logrus"
29 "cypherpunks.ru/govpn"
30 "cypherpunks.ru/govpn/client"
35 remoteAddr = flag.String("remote", "", "Remote server address")
36 proto = flag.String("proto", "udp", "Protocol to use: udp or tcp")
37 ifaceName = flag.String("iface", "tap0", "TUN/TAP network interface")
38 verifierRaw = flag.String("verifier", "", "Verifier")
39 keyPath = flag.String("key", "", "Path to passphrase file")
40 upPath = flag.String("up", "", "Path to up-script")
41 downPath = flag.String("down", "", "Path to down-script")
42 stats = flag.String("stats", "", "Enable stats retrieving on host:port")
43 proxyAddr = flag.String("proxy", "", "Use HTTP proxy on host:port")
44 proxyAuth = flag.String("proxy-auth", "", "user:password Basic proxy auth")
45 mtu = flag.Int("mtu", govpn.MTUDefault, "MTU of TUN/TAP interface")
46 timeoutP = flag.Int("timeout", 60, "Timeout seconds")
47 timeSync = flag.Int("timesync", 0, "Time synchronization requirement")
48 noreconnect = flag.Bool("noreconnect", false, "Disable reconnection after timeout")
49 noisy = flag.Bool("noise", false, "Enable noise appending")
50 encless = flag.Bool("encless", false, "Encryptionless mode")
51 cpr = flag.Int("cpr", 0, "Enable constant KiB/sec out traffic rate")
52 egdPath = flag.String("egd", "", "Optional path to EGD socket")
53 syslog = flag.Bool("syslog", false, "Enable logging to syslog")
54 version = flag.Bool("version", false, "Print version information")
55 warranty = flag.Bool("warranty", false, "Print warranty information")
56 logLevel = flag.String("log_level", "warning", "Log level")
57 protocol govpn.Protocol
59 fields = logrus.Fields{"func": "main"}
64 fmt.Println(govpn.Warranty)
68 fmt.Println(govpn.VersionGet())
72 logger, err := govpn.NewLogger(*logLevel, *syslog)
74 logrus.WithFields(fields).WithError(err).Fatal("Can't initialize logging")
78 logger.WithField("egd_path", *egdPath).WithFields(fields).Debug("Init EGD")
79 govpn.EGDInit(*egdPath)
82 if protocol, err = govpn.NewProtocolFromString(*proto); err != nil {
83 logger.WithError(err).WithFields(fields).WithField("proto", *proto).Fatal("Invalid protocol")
86 if *proxyAddr != "" && protocol == govpn.ProtocolUDP {
87 logrus.WithFields(fields).WithFields(logrus.Fields{
90 }).Fatal("HTTP proxy is supported only in TCP mode")
93 if *verifierRaw == "" {
94 logger.Fatalln("-verifier is required")
96 verifier, err := govpn.VerifierFromString(*verifierRaw)
98 logger.WithError(err).Fatal("Invalid -verifier")
100 key, err := govpn.KeyRead(*keyPath)
102 logger.WithError(err).Fatal("Invalid -key")
104 priv, err := verifier.PasswordApply(key)
106 logger.WithError(err).Fatal("Can't PasswordApply")
109 if protocol != govpn.ProtocolTCP {
110 logger.Fatal("Currently encryptionless mode works only with TCP")
114 conf := client.Configuration{
116 Peer: &govpn.PeerConf{
120 Timeout: time.Second * time.Duration(*timeoutP),
127 Up: govpn.RunScriptAction(upPath),
128 Down: govpn.RunScriptAction(downPath),
131 ProxyAddress: *proxyAddr,
132 ProxyAuthentication: *proxyAuth,
133 RemoteAddress: *remoteAddr,
134 NoReconnect: *noreconnect,
136 if err = conf.Validate(); err != nil {
137 logger.WithError(err).Fatal("Invalid settings")
140 c, err := client.NewClient(conf, logger, govpn.CatchSignalShutdown())
142 logger.WithError(err).Fatal("Can't initialize client")
146 go govpn.StatsProcessor(*stats, c.KnownPeers())
150 if err = <-c.Error; err != nil {
151 logger.WithError(err).Fatal("Fatal error")