public static int Devcon(string p)
=> ProcExec.Exec(Path.Combine(BundleSetup.SupportFilesPath, @"tap\tapinstall.exe"),
Path.Combine(BundleSetup.SupportFilesPath, "tap"), p);
public static int Netsh(string p)
=> ProcExec.Exec("netsh", null, p);
// returns the IP address to use for activation
public static IPAddress RegisterAndStartVlmcsd(IPAddress ipa = null)
{
if (ipa == null)
{
Logger.Debug("Generating a random IP address");
Random rnd = new Random();
// assuming the user is using a /24 in the 10.0.0.0/8 address space, this has a chance
// of 1 in 65k to collide. maybe it's worth trying to detect whether the chosen
// address space is already in use by other NICs, but it is kind of a worthless battle:
// what if the user connects to a different network after we do this?
// we could add a bit more randomness (we still have 6 free bits in the last octed) but I
// don't think it's worth the hassle, especially because people usually use /24's anyway.
// anyway, we pick a random /30 and pass its first address (.9) to vlmcsd, which will
// configure the Tap adapter to use it. vlmcsd will then listen on all other addresses,
// which, since we are using a /30, correspond to just the single .10
byte[] octects = new byte[] { 10, (byte)rnd.Next(256), (byte)rnd.Next(256), 9 };
ipa = new IPAddress(octects);
}
if (ipa.AddressFamily != AddressFamily.InterNetwork)
{
Logger.Error("Passed address is not of the right family");
return(null);
}
Logger.Info("Using IP address " + ipa.ToString() + " for Tap interface");
// -s: run as a service
// -U /n: run as "NT AUTHORITY\eNetworkService"
// -O: tap adapter configuration
string vlmcsdPath = Path.Combine(BundleSetup.SupportFilesPath, "vlmcsd");
string vlmcsdExePath = Path.Combine(vlmcsdPath, "vlmcsd.exe");
string p = "-s -U /n -O \"" + NicHelper.JAW_DEV_NAME + "\"=" + ipa.ToString() + "/30";
ProcExec.Exec(vlmcsdExePath, vlmcsdPath, p);
if (!VlmcsdRegistered())
{
Logger.Error("Failed to register vlmcsd service");
return(null);
}
// add firewall rule
// TODO: this should probably be done through WMI, if possible, and we should also check
// if it succeeded before continuing
ProcExec.Exec("netsh", null,
"advfirewall firewall add rule name=\"vlmcsd\" dir=in action=allow " +
"program=\"" + vlmcsdExePath + "\" enable=yes");
Logger.Debug("Added firewall rule");
// start the service
VlmcsdStart();
if (!VlmcsdStarted())
{
Logger.Error("Failed to start vlmcsd service");
return(null);
}
// return activation IP address as described above
byte[] activationOctects = ipa.GetAddressBytes();
activationOctects[3] += 1;
return(new IPAddress(activationOctects));
}
