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.
31 "cypherpunks.ru/govpn"
35 bindAddr = flag.String("bind", "[::]:1194", "Bind to address")
36 proto = flag.String("proto", "udp", "Protocol to use: udp, tcp or all")
37 confPath = flag.String("conf", "peers.yaml", "Path to configuration YAML")
38 stats = flag.String("stats", "", "Enable stats retrieving on host:port")
39 proxy = flag.String("proxy", "", "Enable HTTP proxy on host:port")
40 egdPath = flag.String("egd", "", "Optional path to EGD socket")
41 syslog = flag.Bool("syslog", false, "Enable logging to syslog")
42 version = flag.Bool("version", false, "Print version information")
43 warranty = flag.Bool("warranty", false, "Print warranty information")
49 fmt.Println(govpn.Warranty)
53 fmt.Println(govpn.VersionGet())
56 timeout := time.Second * time.Duration(govpn.TimeoutDefault)
57 log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
58 log.Println(govpn.VersionGet())
63 log.Println("Using", *egdPath, "EGD")
64 govpn.EGDInit(*egdPath)
80 log.Fatalln("Unknown protocol specified")
83 termSignal := make(chan os.Signal, 1)
84 signal.Notify(termSignal, os.Interrupt, os.Kill)
86 hsHeartbeat := time.Tick(timeout)
87 go func() { <-hsHeartbeat }()
90 log.Println("Stats are going to listen on", *stats)
91 statsPort, err := net.Listen("tcp", *stats)
93 log.Fatalln("Can not listen on stats port:", err)
95 go govpn.StatsProcessor(statsPort, &knownPeers)
100 govpn.BothPrintf(`[started bind="%s"]`, *bindAddr)
102 var needsDeletion bool
107 govpn.BothPrintf(`[terminating bind="%s"]`, *bindAddr)
108 peers.Range(func(_, psI interface{}) bool {
109 ps := psI.(*PeerState)
111 confs[*ps.peer.ID].Down,
121 handshakes.Range(func(addrI, hsI interface{}) bool {
122 addr := addrI.(string)
123 hs := hsI.(*govpn.Handshake)
124 if hs.LastPing.Add(timeout).Before(now) {
125 govpn.Printf(`[handshake-delete bind="%s" addr="%s"]`, *bindAddr, addr)
127 handshakes.Delete(addr)
132 peers.Range(func(addrI, psI interface{}) bool {
133 addr := addrI.(string)
134 ps := psI.(*PeerState)
136 needsDeletion = ps.peer.LastPing.Add(timeout).Before(now)
137 ps.peer.BusyR.Unlock()
140 `[peer-delete bind="%s" peer="%s"]`,
145 knownPeers.Delete(addr)
146 peersByID.Delete(*ps.peer.ID)
148 confs[*ps.peer.ID].Down,
152 ps.terminator <- struct{}{}