func ServerStart(bindAddr, proto, confPath, stats, proxy, egdPath string, mtu int) {
timeout := time.Second * time.Duration(govpn.TimeoutDefault)
log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
log.Println(govpn.VersionGet())
if len(bindAddr) <= 0 {
bindAddr = "[::]:1194"
}
if len(proto) <= 0 {
proto = "udp"
}
if len(confPath) <= 0 {
confPath = "peers.json"
}
if mtu <= 0 {
mtu = 1452
}
govpn.MTU = mtu
confInit(&confPath)
knownPeers = govpn.KnownPeers(make(map[string]**govpn.Peer))
if egdPath != "" {
log.Println("Using", egdPath, "EGD")
govpn.EGDInit(egdPath)
}
switch proto {
case "udp":
startUDP(&bindAddr)
case "tcp":
startTCP(&bindAddr)
case "all":
startUDP(&bindAddr)
startTCP(&bindAddr)
default:
log.Fatalln("Unknown protocol specified")
}
termSignal := make(chan os.Signal, 1)
signal.Notify(termSignal, os.Interrupt, os.Kill)
hsHeartbeat := time.Tick(timeout)
go func() { <-hsHeartbeat }()
log.Println("Max MTU on TAP interface:", govpn.TAPMaxMTU())
if stats != "" {
log.Println("Stats are going to listen on", stats)
statsPort, err := net.Listen("tcp", stats)
if err != nil {
log.Fatalln("Can not listen on stats port:", err)
}
go govpn.StatsProcessor(statsPort, &knownPeers)
}
if proxy != "" {
go proxyStart(&proxy)
}
log.Println("Server started")
var needsDeletion bool
MainCycle:
for {
select {
case <-termSignal:
break MainCycle
case <-hsHeartbeat:
now := time.Now()
hsLock.Lock()
for addr, hs := range handshakes {
if hs.LastPing.Add(timeout).Before(now) {
log.Println("Deleting handshake state", addr)
hs.Zero()
delete(handshakes, addr)
}
}
peersLock.Lock()
peersByIdLock.Lock()
kpLock.Lock()
for addr, ps := range peers {
ps.peer.BusyR.Lock()
needsDeletion = ps.peer.LastPing.Add(timeout).Before(now)
ps.peer.BusyR.Unlock()
if needsDeletion {
log.Println("Deleting peer", ps.peer)
delete(peers, addr)
delete(knownPeers, addr)
delete(peersById, *ps.peer.Id)
go govpn.ScriptCall(
confs[*ps.peer.Id].Down,
ps.tap.Name,
)
ps.terminator <- struct{}{}
}
}
hsLock.Unlock()
peersLock.Unlock()
peersByIdLock.Unlock()
kpLock.Unlock()
}
}
}
func main() {
flag.Parse()
timeout = *timeoutP
var err error
log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
govpn.MTU = *mtu
if *egdPath != "" {
log.Println("Using", *egdPath, "EGD")
govpn.EGDInit(*egdPath)
}
verifier, err := govpn.VerifierFromString(*verifierRaw)
if err != nil {
log.Fatalln(err)
}
priv := verifier.PasswordApply(govpn.StringFromFile(*keyPath))
conf = &govpn.PeerConf{
Id: verifier.Id,
Timeout: time.Second * time.Duration(timeout),
Noise: *noisy,
CPR: *cpr,
Verifier: verifier,
DSAPriv: priv,
}
idsCache = govpn.NewCipherCache([]govpn.PeerId{*verifier.Id})
log.Println(govpn.VersionGet())
tap, err = govpn.TAPListen(*ifaceName)
if err != nil {
log.Fatalln("Can not listen on TAP interface:", err)
}
log.Println("Max MTU on TAP interface:", govpn.TAPMaxMTU())
if *stats != "" {
log.Println("Stats are going to listen on", *stats)
statsPort, err := net.Listen("tcp", *stats)
if err != nil {
log.Fatalln("Can not listen on stats port:", err)
}
go govpn.StatsProcessor(statsPort, &knownPeers)
}
termSignal := make(chan os.Signal, 1)
signal.Notify(termSignal, os.Interrupt, os.Kill)
MainCycle:
for {
timeouted := make(chan struct{})
rehandshaking := make(chan struct{})
termination := make(chan struct{})
if *proxyAddr != "" {
*proto = "tcp"
}
switch *proto {
case "udp":
go startUDP(timeouted, rehandshaking, termination)
case "tcp":
if *proxyAddr != "" {
go proxyTCP(timeouted, rehandshaking, termination)
} else {
go startTCP(timeouted, rehandshaking, termination)
}
default:
log.Fatalln("Unknown protocol specified")
}
select {
case <-termSignal:
log.Fatalln("Finishing")
termination <- struct{}{}
break MainCycle
case <-timeouted:
break MainCycle
case <-rehandshaking:
}
close(timeouted)
close(rehandshaking)
close(termination)
}
govpn.ScriptCall(*downPath, *ifaceName)
}