Check that specified MTUs are not greater than MTUMax

[govpn.git] / src / govpn / cmd / govpn-client / main.go

diff --git a/src/govpn/cmd/govpn-client/main.go b/src/govpn/cmd/govpn-client/main.go
index da7ac2bb270f54831a5eb51026e29e3f86d6d71f..c4414050937f20e9740a3233d6e2d0c1fcac193e 100644 (file)
--- a/src/govpn/cmd/govpn-client/main.go
+++ b/src/govpn/cmd/govpn-client/main.go
@@ -41,7 +41,7 @@ var (
        stats       = flag.String("stats", "", "Enable stats retrieving on host:port")
        proxyAddr   = flag.String("proxy", "", "Use HTTP proxy on host:port")
        proxyAuth   = flag.String("proxy-auth", "", "user:password Basic proxy auth")
-       mtu         = flag.Int("mtu", 1452, "MTU for outgoing packets")
+       mtu         = flag.Int("mtu", govpn.MTUDefault, "MTU of TAP interface")
        timeoutP    = flag.Int("timeout", 60, "Timeout seconds")
        noisy       = flag.Bool("noise", false, "Enable noise appending")
        encless     = flag.Bool("encless", false, "Encryptionless mode")
@@ -53,7 +53,7 @@ var (
        timeout     int
        firstUpCall bool = true
        knownPeers  govpn.KnownPeers
-       idsCache    govpn.CipherCache
+       idsCache    *govpn.CipherCache
 )
 
 func main() {
@@ -62,8 +62,9 @@ func main() {
        var err error
        log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
 
-       govpn.MTU = *mtu
-
+       if *mtu > govpn.MTUMax {
+               log.Fatalln("Maximum allowable MTU is", govpn.MTUMax)
+       }
        if *egdPath != "" {
                log.Println("Using", *egdPath, "EGD")
                govpn.EGDInit(*egdPath)
@@ -82,22 +83,23 @@ func main() {
        }
        conf = &govpn.PeerConf{
                Id:       verifier.Id,
+               Iface:    *ifaceName,
+               MTU:      *mtu,
                Timeout:  time.Second * time.Duration(timeout),
                Noise:    *noisy,
                CPR:      *cpr,
-               EncLess:  *encless,
+               Encless:  *encless,
                Verifier: verifier,
                DSAPriv:  priv,
        }
        idsCache = govpn.NewCipherCache([]govpn.PeerId{*verifier.Id})
        log.Println(govpn.VersionGet())
 
-       tap, err = govpn.TAPListen(*ifaceName)
+       tap, err = govpn.TAPListen(*ifaceName, *mtu)
        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)