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("loglevel", "warning", "Logging 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 not 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 {
89 ).Fatal("Invalid protocol")
92 if *proxyAddr != "" && protocol == govpn.ProtocolUDP {
93 logrus.WithFields(fields).WithFields(logrus.Fields{
96 }).Fatal("HTTP proxy is supported only in TCP mode")
99 if *verifierRaw == "" {
100 logger.Fatalln("-verifier is required")
102 verifier, err := govpn.VerifierFromString(*verifierRaw)
104 logger.WithError(err).Fatal("Invalid -verifier")
106 key, err := govpn.KeyRead(*keyPath)
108 logger.WithError(err).Fatal("Invalid -key")
110 priv, err := verifier.PasswordApply(key)
112 logger.WithError(err).Fatal("Can not PasswordApply")
115 if protocol != govpn.ProtocolTCP {
116 logger.Fatal("Currently encryptionless mode works only with TCP")
120 conf := client.Configuration{
122 Peer: &govpn.PeerConf{
126 Timeout: time.Second * time.Duration(*timeoutP),
133 Up: govpn.RunScriptAction(upPath),
134 Down: govpn.RunScriptAction(downPath),
137 ProxyAddress: *proxyAddr,
138 ProxyAuthentication: *proxyAuth,
139 RemoteAddress: *remoteAddr,
140 NoReconnect: *noreconnect,
142 if err = conf.Validate(); err != nil {
143 logger.WithError(err).Fatal("Invalid settings")
146 c, err := client.NewClient(conf, logger, govpn.CatchSignalShutdown())
148 logger.WithError(err).Fatal("Can not initialize client")
152 go govpn.StatsProcessor(*stats, c.KnownPeers())
156 if err = <-c.Error; err != nil {
157 logger.WithError(err).Fatal("Fatal error")